CN211824007U - Heat exchange system - Google Patents

Abstract

The utility model discloses a heat exchange system. The heat exchange system comprises a compressor, a first heat exchanger, a throttle element, a second heat exchanger and a flow direction conversion element. The compressor is respectively connected with the first heat exchanger through the flow direction conversion element. The heat exchanger is connected with the second heat exchanger, the throttling element is connected between the first heat exchanger and the second heat exchanger, the heat exchange system also includes a connecting pipe and a heating device, and the connecting pipe includes a first opening and a second heat exchanger opening, the first opening of the connecting pipe is communicated with the first opening of the second heat exchanger and the second opening of the throttling member, the second opening of the connecting pipe is communicated with the second opening of the second heat exchanger, and the first opening of the connecting pipe The two openings are communicated with the second opening of the compressor through the flow direction converting member, and the heating device is arranged on the connecting pipe. The heat exchange system of the utility model delays the frost formation speed in the heating mode, which is beneficial to improve the heat exchange performance.

Description

heat exchange system

technical field

The utility model relates to the technical field of heat exchange, and more particularly, to a heat exchange system.

Background technique

In the related art, when the microchannel heat exchanger is used as an outdoor heat exchanger, the biggest technical problem is that it is easy to form frost. Micro-channel heat exchangers are used as outdoor heat exchangers. Compared with copper tube-finned heat exchangers as outdoor heat exchangers, micro-channel heat exchangers are prone to frost when running in heating mode, which affects the heat exchange of heat exchangers. Thermal performance and system energy efficiency.

Utility model content

To this end, the present utility model proposes a heat exchange system, which delays the frost formation speed in the heating mode and is beneficial to improve the heat exchange performance.

A heat exchange system according to an embodiment of the first aspect of the present invention includes a compressor, a first heat exchanger, a second heat exchanger, a throttle and a flow direction changer, the compressor including a first opening and a second an opening, the first heat exchanger includes a first opening and a second opening, the throttling member includes a first opening and a second opening, the second heat exchanger includes a first opening and a second opening, the The first opening of the first heat exchanger communicates with the first opening of the compressor through the flow direction conversion member, and the second opening of the first heat exchanger communicates with the first opening of the throttle member, so The second opening of the throttle member communicates with the first opening of the second heat exchanger, and the second opening of the second heat exchanger communicates with the second opening of the compressor through the flow direction conversion member, When the heat exchange system is working, the heat exchange system is filled with refrigerant, and the flow direction conversion member is used to change the flow direction of the refrigerant in the heat exchange system, and the heat exchange system further includes a connecting pipe and a heating device, The connecting pipe includes a first opening and a second opening, the first opening of the connecting pipe communicates with the first opening of the second heat exchanger and the second opening of the throttling member, and the connecting pipe is The second opening of the second heat exchanger communicates with the second opening of the second heat exchanger, and the second opening of the connecting pipe communicates with the second opening of the compressor through the flow direction conversion member. The heating device is provided at the connection. Tube.

According to the heat exchange system of the embodiment of the present invention, by setting the connecting pipe and the heating device, and in the heating mode, that is, in the frosting condition, the connecting pipe communicates with the first opening of the second heat exchanger and the second opening of the throttling member. The opening and the second opening of the second heat exchanger and the flow direction conversion member can make the refrigerant flowing out of the first heat exchanger and the throttling member in sequence enter the flow direction conversion member through the connecting pipe, or the refrigerant in the second heat exchanger. It flows out from the first opening of the second heat exchanger, flows into the flow direction adapter through the connecting pipe, and then flows back to the compressor through the flow direction adapter. The refrigerant no longer enters the flow direction adapter through the second heat exchanger, and the flow resistance is relatively reduced. . In addition, the heating device is turned on to heat the refrigerant flowing through the connecting pipe to accelerate the vaporization of the liquid refrigerant, increase the evaporation temperature, delay the frost formation speed in the heating mode, and improve the heat exchange performance.

In some embodiments, the heat exchange system further includes a control member, the control member is provided on the connecting pipe for connecting or disconnecting the first opening of the connecting pipe and the second opening of the connecting pipe .

In some embodiments, the first opening of the first heat exchanger communicates with the second opening of the compressor through the flow direction conversion member, and the second opening of the second heat exchanger is converted through the flow direction The component communicates with the first opening of the compressor, the first opening of the first heat exchanger communicates with the first opening of the compressor, and the second opening of the second heat exchanger communicates with the first opening of the compressor. The second opening of the compressor is in communication; while the first opening of the first heat exchanger is in communication with the second opening of the compressor, the second opening of the second heat exchanger is in communication with the second opening of the compressor. An opening communicates with one another, the flow direction conversion member includes a first opening, a second opening, a third opening and a fourth opening, the first opening of the flow direction conversion member communicates with the first opening of the compressor, and the flow direction conversion member communicates with the first opening of the compressor. The second opening of the flow-to-conversion member communicates with the first opening of the first heat exchanger, the third opening of the flow-to-conversion member communicates with the second opening of the second heat exchanger, and the fourth opening of the flow-to-conversion member communicates with the second opening of the second heat exchanger. The opening communicates with the second opening of the compressor, the heat exchange system is in the heating mode, and the first opening of the flow direction conversion member communicates with the second opening to communicate the first opening of the compressor and the first opening. A first opening of a heat exchanger, the third opening of the flow direction conversion member communicates with a fourth opening to communicate with the second opening of the compressor and the second opening of the second heat exchanger, the control member It is opened to communicate the first opening and the second opening of the connecting pipe, and the heating device is opened to heat the refrigerant in the connecting pipe.

In some embodiments, the heating device is an electric heating wire, and the electric heating wire is arranged in the connection pipe; or the electric heating device is an electric heating pipe, and the electric heating pipe is arranged in the connection pipe; The heating device is an electric heating belt, and the electric heating belt is wound around the outer wall of the connecting pipe.

In some embodiments, the second heat exchanger includes: a first header and a second header, the first header and the second header are spaced apart, the first header The flow tube is adjacent to and communicated with the first opening of the second heat exchanger, the second header is adjacent to and communicated with the second opening of the second heat exchanger; a plurality of heat exchange tubes, a plurality of all The heat exchange tubes are arranged at intervals along the length direction of the first header, and at least one of the heat exchange tubes is connected to the first header at one end in the length direction, and the heat exchange tube is at its end. The other end in the length direction is connected to the second header to communicate with the first header and the second header; a first tube, the first tube and the first header The tubes are connected, and one end of the first tube is located outside the first header, and the first opening of the second heat exchanger is provided at the one end of the first tube; the second tube , the second pipe communicates with the second header, and one end of the second pipe is located outside the second header, and the second opening of the second heat exchanger is provided at the the one end of the second tube.

In some embodiments, the first opening of the connecting pipe is provided at one end of the connecting pipe, and the one end of the connecting pipe is connected to the one end of the first pipe, or, The one end portion of the connecting pipe is connected with the one end portion of the first header to communicate with the connecting pipe and the first header, and the second opening of the connecting pipe is provided at the The other end of the connecting pipe is connected to the other end of the second pipe.

In some embodiments, the other end of the first tube and a section adjacent to the other end are located in the first header, and the section of the first tube is configured to communicate with the first tube and the through hole of the first header.

In some embodiments, the first header includes two ends spaced apart in its length direction, and the connection between the connecting pipe and the first header is away from the first header of both ends.

In some embodiments, the heat exchange tube is a flat tube, and the heat exchange tube includes a first side surface and a second side surface arranged oppositely and a third side surface and a fourth side surface arranged oppositely. The distance between one side surface and the second side surface is smaller than the distance between the third side surface and the fourth side surface of the heat exchange tube, the heat exchange tube further includes a plurality of channels arranged at intervals, and the heat exchange tube passes through the The passage communicates with the first header and the second header, each of the plurality of heat exchange tubes communicates with the first header and the second header, and the The relationship between the connecting pipe and the heat exchange pipe of the second heat exchanger is:

A≥0.5·n·C, where A is the flow area of the connecting tube, C is the flow area of a single heat exchange tube, and n is the number of the heat exchange tubes in the heat exchanger.

A heat exchange system according to an embodiment of the second aspect of the present invention includes a compressor, a first heat exchanger, a second heat exchanger, a throttling member and a flow direction changing member, the compressor including a first opening and a second an opening, the first heat exchanger includes a first opening and a second opening, the throttling member includes a first opening and a second opening, the second heat exchanger includes a first opening and a second opening, the The first opening of the first heat exchanger communicates with the first opening of the compressor through the flow direction conversion member, and the second opening of the first heat exchanger communicates with the first opening of the throttle member, so The second opening of the throttle member communicates with the first opening of the second heat exchanger, and the second opening of the second heat exchanger communicates with the second opening of the compressor through the flow direction conversion member, When the heat exchange system is in operation, the heat exchange system is filled with refrigerant, and the flow direction converting member is used to change the flow direction of the refrigerant in the heat exchange system. The heat exchange system further includes a heating device, and the heating A device is positioned between the second opening of the second heat exchanger and the second opening of the compressor.

According to the heat exchange system of the embodiment of the present invention, by setting the heating device, the heating device can be turned on in the heating mode to heat the refrigerant flowing through any position between the second opening of the second heat exchanger and the second opening of the compressor , which can accelerate the vaporization of liquid refrigerant, increase the evaporation temperature, delay the frost formation speed in the heating mode, and improve the heat exchange performance.

In some embodiments, the first opening of the first heat exchanger communicates with the second opening of the compressor through the flow direction conversion member, and the second opening of the second heat exchanger is converted through the flow direction The component communicates with the first opening of the compressor, the first opening of the first heat exchanger communicates with the first opening of the compressor, and the second opening of the second heat exchanger communicates with the first opening of the compressor. The second opening of the compressor communicates with the first opening of the first heat exchanger and the second opening of the compressor, while the second opening of the second heat exchanger communicates with the first opening of the compressor. An opening communicates with one another, the flow direction conversion member includes a first opening, a second opening, a third opening and a fourth opening, the first opening of the flow direction conversion member communicates with the first opening of the compressor, and the flow direction conversion member communicates with the first opening of the compressor. The second opening of the flow-to-conversion member communicates with the first opening of the first heat exchanger, the third opening of the flow-to-conversion member communicates with the second opening of the second heat exchanger, and the fourth opening of the flow-to-conversion member communicates with the second opening of the second heat exchanger. The opening communicates with the second opening of the compressor, the heat exchange system is in the heating mode, and the first opening of the flow direction conversion member communicates with the second opening to communicate the first opening of the compressor and the first opening. a first opening of a heat exchanger, the third opening of the flow-direction converter communicates with the fourth opening to communicate with the second opening of the compressor and the second opening of the second heat exchanger, the The heating device is turned on to heat the refrigerant at least in part between the second opening of the second heat exchanger and the second opening of the compressor.

In some embodiments, the heat exchange system further includes a gas-liquid separator, the gas-liquid separator includes a first opening and a second opening, and the first opening of the gas-liquid separator communicates with the flow direction conversion member , the second opening of the gas-liquid separator communicates with the second opening of the compressor, and the heating device is provided in the gas-liquid separator.

In some embodiments, the heating device is an electric heating wire, and the electric heating wire is arranged in the gas-liquid separator; or the electric heating device is an electric heating pipe, and the electric heating tube is arranged in the gas-liquid separator. or the electric heating device is an electric heating belt, and the electric heating belt is wound around the outer wall of the gas-liquid separator.

A heat exchange system according to an embodiment of the third aspect of the present invention includes a compressor, a first heat exchanger, a second heat exchanger, a throttling member and a flow direction changing member, the compressor including a first opening and a second opening , the first heat exchanger includes a first opening and a second opening, the throttling member includes a first opening and a second opening, and the first opening of the first heat exchanger passes through the flow direction conversion member and the other The first opening of the compressor communicates with the first opening of the first heat exchanger, and the second opening of the first heat exchanger communicates with the first opening of the throttling member. When the heat exchange system is in operation, the heat exchange system is filled with refrigerant. The flow direction conversion member is used to change the flow direction of the refrigerant in the heat exchange system, the second heat exchanger includes a first header, a second header and a plurality of heat exchange tubes, the first header The flow tubes and the second headers are arranged at intervals, a plurality of the heat exchange tubes are arranged at intervals along the length direction of the first header tubes, and at least one of the heat exchange tubes is at one end in the length direction thereof connected to the first header, the other end of the heat exchange tube in the length direction is connected to the second header to communicate with the first header and the second header, The first header communicates with the second opening of the throttle member, the second header communicates with the second opening of the compressor through the flow direction conversion member, and the heat exchange system further includes and a heating device, the heating device is arranged in the first header.

According to the heat exchange system of the embodiment of the present invention, by setting the heating device and turning on the heating device in the heating mode to heat the refrigerant flowing through the first header, the refrigerant can be converted from liquid to gaseous refrigerant, and the liquid refrigerant can be accelerated. Gasification increases the evaporation temperature, delays the frosting speed in the heating mode, and improves the heat exchange performance.

In some embodiments, the first opening of the first heat exchanger communicates with the second opening of the compressor through the flow direction switch, and the second header communicates with the compressor through the flow direction switch The first opening of the compressor communicates with the first opening of the first heat exchanger, and the second header communicates with the second opening of the compressor while the first opening of the first heat exchanger communicates with the first opening of the compressor; While the first opening of the first heat exchanger communicates with the second opening of the compressor, the second header communicates with the first opening of the compressor, and the flow direction conversion member includes a first an opening, a second opening, a third opening and a fourth opening, the first opening of the flow direction conversion member communicates with the first opening of the compressor, and the second opening of the flow direction conversion member exchanges heat with the first The first opening of the flow direction converter communicates with the second opening of the second heat exchanger, the fourth opening of the flow direction converter communicates with the second opening of the compressor, In the heating mode of the heat exchange system, the first opening of the flow direction conversion member communicates with the second opening to communicate with the first opening of the compressor and the first opening of the first heat exchanger, and the flow direction The third opening of the conversion member communicates with the fourth opening to communicate with the second opening of the compressor and the second header, and the heating device is turned on to heat the refrigerant in the first header .

In some embodiments, the heating device is a heating tube or a heating wire.

In some embodiments, the heat exchange system further includes a gas-liquid separator, the gas-liquid separator includes a first opening and a second opening, and the first opening of the gas-liquid separator communicates with the flow direction conversion member , the second opening of the gas-liquid separator communicates with the second opening of the compressor.

Description of drawings

FIG. 1 is a schematic structural diagram of a heat exchange system according to an embodiment of the present invention.

FIG. 2 is a partial enlarged schematic view of the heat exchange system in FIG. 1 .

FIG. 3 is a schematic diagram of the heat exchange system of FIG. 1 showing the openings of the various devices in the system.

4 is a schematic structural diagram of a heat exchange system according to another embodiment of the present invention.

FIG. 5 is a partial enlarged schematic view of the heat exchange system in FIG. 4 .

FIG. 6 is a schematic structural diagram of a heat exchange system according to still another embodiment of the present invention.

7 is a schematic structural diagram of a heat exchange system according to yet another embodiment of the present invention.

FIG. 8 is a partial enlarged schematic view of the heat exchange system in FIG. 7 .

Reference number:

Compressor 1, first opening 11 of compressor, second opening 12 of compressor, flow to converter 2, first opening 21 of flow to converter, second opening 22 of flow to converter, third opening of flow to converter 23, the fourth opening 24 of the flow direction conversion element, the first heat exchanger 3, the first opening 31 of the first heat exchanger, the second opening 32 of the first heat exchanger, the throttling element 4, the first opening of the throttling element an opening 41, the second opening 42 of the throttle, the second heat exchanger 5, the first opening 501 of the second heat exchanger, the second opening 502 of the second heat exchanger, the first header 51, the first Two headers 52, heat exchange tubes 53, fins 54, connecting tube 6, first opening 61 of the connecting tube, second opening 62 of the connecting tube, control member 7, heating device 8, gas-liquid separator 9, gas-liquid separator 9, The first opening 91 of the liquid separator and the second opening 92 of the gas-liquid separator.

Detailed ways

The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to be used to explain the present invention, but should not be construed as a limitation of the present invention. In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inside", "Outside", "Clockwise", "Counterclockwise", "Axial" The orientation or positional relationship indicated by , "radial direction", "circumferential direction", etc. are based on the orientation or positional relationship shown in the accompanying drawings, which are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying the indicated device. Or the element clamp must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be construed as a limitation of the present invention.

As shown in FIGS. 1-5 , the heat exchange system according to the embodiment of the present invention includes a compressor 1 , a first heat exchanger 3 , a second heat exchanger 5 , a throttle member 4 and a flow direction conversion member 2 . The compressor 1 includes a first opening 11 and a second opening 12, the first heat exchanger 3 includes a first opening 31 and a second opening 32, the throttle member 4 includes a first opening 41 and a second opening 42, and the second heat exchange The compressor 5 includes a first opening 501 and a second opening 502, the first opening 31 of the first heat exchanger 3 communicates with the first opening 11 of the compressor 1 through the flow direction conversion member 2, and the second opening of the first heat exchanger 3 32 is communicated with the first opening 41 of the throttle member 4, the second opening 42 of the throttle member 4 is communicated with the first opening 501 of the second heat exchanger 5, and the second opening 502 of the second heat exchanger 5 is converted by the flow direction The element 2 communicates with the second opening 12 of the compressor 1 .

Specifically, adjacent devices in the heat exchange system are connected at least through pipelines, in other words, the first opening 11 of the compressor 1 and the flow direction conversion member 2 are connected through at least a first pipeline, and the flow direction conversion member 2 and the first The first openings 31 of the heat exchanger 3 are connected at least through a second pipeline, and the second opening 32 of the first heat exchanger 3 and the first opening 41 of the throttle member 4 are connected through at least a third pipeline, The second opening 42 of the throttle member 4 and the first opening 501 of the second heat exchanger 5 are connected at least through a fourth pipeline, and the second opening 502 of the second heat exchanger 5 and the flow direction conversion member 2 are connected at least through a fourth pipeline. It is connected through a fifth pipeline, and the flow direction converter 2 and the second opening 12 of the compressor 1 are connected through at least a sixth pipeline.

When the heat exchange system is working, the heat exchange system is filled with refrigerant, and the refrigerant can circulate in the heat exchange system. The flow direction converter 2 is used to change the flow direction of the refrigerant in the heat exchange system. In other words, under the action of the flow direction conversion element 2, the refrigerant can flow out from the compressor 1, firstly pass through the first heat exchanger 3 and then pass through the second heat exchanger 5, and then flow back to the compressor 1, and can also flow out from the compressor 1. First, it flows back to the compressor 1 through the second heat exchanger 5 and then through the first heat exchanger 3 .

The heat exchange system also includes a connecting pipe 6 and a heating device 8 . The connecting pipe 6 includes a first opening 61 and a second opening 62 , the first opening 61 of the connecting pipe 6 communicates with the first opening 501 of the second heat exchanger 5 , and the first opening 61 of the connecting pipe 6 communicates with the throttle 4 The second opening 42 is connected. The second opening 62 of the connecting pipe 6 communicates with the second opening 502 of the second heat exchanger 5 , and the second opening 62 of the connecting pipe 6 communicates with the second opening 12 of the compressor 1 through the flow direction converter 2 .

In other words, the connecting pipes 6 are provided at the first opening 501 and the second opening 502 of the second heat exchanger 5 so that the first opening 501 and the second opening 502 of the second heat exchanger 5 can pass through the second heat exchanger 5 itself can be communicated through the connecting pipe 6 , and the throttle element 4 can be communicated with the flow direction converting element 2 through the second heat exchanger 5 , and can also be communicated through the connecting pipe 6 .

The heating device 8 is provided on the connecting pipe 6 . Specifically, in the heating mode, the heating device 8 can be turned on to heat the refrigerant in the connecting pipe 6, so as to promote the refrigerant to change from a liquid state to a gaseous state.

In addition, when the heat exchange system is in use, the first opening 501 of the second heat exchanger 5 is lower than the second opening 502 of the second heat exchanger 5 in the direction of gravity, and the first opening 61 of the connecting pipe 6 is in the direction of gravity Below the second opening 62 of the connecting pipe 6 .

In other words, when the first opening 501 of the second heat exchanger 5 is at the bottom and the second opening 502 is at the top, the refrigerant entering the second heat exchanger 5 through the first opening 501 of the second heat exchanger 5 needs to overcome its own gravity The effect is to flow downward to flow out through the second opening 502 of the second heat exchanger 5 and return to the compressor 1 through the flow direction conversion member 2, and the flow resistance is relatively large. In this case, the connection pipe 6 can be provided to avoid Flow resistance, improve heat transfer performance.

According to the heat exchange system of the embodiment of the present invention, by arranging the connecting pipe 6 and the heating device 8, in the heating mode, that is, the frosting condition, the connecting pipe 6 can communicate with the first opening 501 and the joint of the second heat exchanger 5 through the connecting pipe 6. The second opening 42 of the flow element 4 and the second opening 502 of the second heat exchanger 5, the flow direction conversion element 2, so that the refrigerant flowing out through the first heat exchanger 3 and the throttle element 4 can enter the flow direction through the connecting pipe 6 The refrigerant in the conversion part 2 or the second heat exchanger 5 flows out from the first opening 501 of the second heat exchanger 5 and flows into the conversion part 2 through the connecting pipe 6, and then flows back to the compressor 1 through the flow direction conversion part 2. The refrigerant The second heat exchanger 5 no longer enters the flow direction adapter 2, the flow resistance is relatively reduced, and the heating device 8 is turned on to heat the refrigerant flowing through the connecting pipe 6, which can convert the refrigerant from liquid to gaseous refrigerant to accelerate the liquid refrigerant. Gasification increases the evaporation temperature, delays the frost formation rate in the heating mode, and is beneficial to improve the heat exchange performance.

In addition, since the vaporization of the liquid refrigerant is accelerated, the gaseous refrigerant entering the compressor 1 is increased, and the problem of liquid slamming of the compressor is avoided.

In some embodiments, the control member 7 is provided on the connecting pipe 6 for connecting or disconnecting the first opening 61 of the connecting pipe 6 and the second opening 62 of the connecting pipe 6 . In other words, when the control member 7 is opened, the first opening 501 of the second heat exchanger 5 and the second opening of the throttle member 4 communicate with the second opening 502 of the second heat exchanger 5 and the flow direction converting member 2 through the connecting pipe 6 .

When the heat exchange system is in use, in the heating mode (frosting condition), the connecting pipe 6 communicates with the first opening 501 of the second heat exchanger 5 , the second opening 42 of the throttle member 4 and the second heat exchanger 5 The second opening 502 of the compressor 1 flows to the conversion member 2, the heating device 8 is turned on to heat the refrigerant flowing through the connecting pipe 6, and the refrigerant flowing from the compressor 1 can enter the first opening 31 of the first heat exchanger 3 through the flow direction conversion member 2 , and flows out from the second opening 32 of the first heat exchanger 3 and flows back into the compressor 1 through the throttling member 4, the connecting pipe 6 and the flow direction conversion member 2 in sequence, so that in this mode, by setting the connecting pipe 6 The problem of large flow resistance of the refrigerant in the second heat exchanger 5 is avoided. By heating the refrigerant flowing through the connecting pipe 6 by the heating device 8, the liquid refrigerant can be converted into a gaseous refrigerant in time, which accelerates the vaporization of the liquid refrigerant and increases the evaporation temperature. , which delays the frost formation speed in the heating mode, which is beneficial to improve the heat exchange performance.

When the heat exchange system is in the cooling mode, that is, in the defrosting condition, the control element 7 is turned off, and the heating device 8 is turned off. 4 and the first heat exchanger 3, and then flow back to the compressor 1 through the flow direction conversion element 2. In other words, in the cooling mode, the refrigerant no longer flows back to the compressor 1 through the connecting pipe 6 through the flow direction converter 2 .

Further, in the start-up stage of the heating mode (frost condition), the control member 7 is opened to communicate the first opening 61 and the second opening 62 of the connecting pipe 6 , and the heating device 8 is turned on to heat the water flowing through the connecting pipe 6 . refrigerant.

In the stable stage of the heating mode (frosting condition), the control element 7 is turned off, the heating device 8 is turned off, and the refrigerant flowing from the compressor 1 can flow to the conversion element 2 and then enter the first opening 31 of the first heat exchanger 3 , and flow out from the second opening 32 of the first heat exchanger 3 and enter the first opening 501 of the second heat exchanger 5 through the throttling member 4 , and flow out from the second opening 502 of the second heat exchanger 5 and pass through The flow direction converter 2 is returned to the compressor 1 .

It should be noted here that the heating mode includes a start-up stage and a stable stage. After the compressor 1 is turned on in the heating mode, the flow rate of the refrigerant gradually increases from a very low start and reaches a certain normal operating speed. at speed. The period from the start of compressor 1 until the flow rate of the refrigerant reaches the normal operating speed is the startup stage of the heating mode, and the period when the flow rate of the refrigerant is at the normal operating speed is the stable stage of the heating mode. According to the knowledge in the art, the startup phase of the heating mode is within 5 minutes of the startup of the heating mode.

In other words, in some specific embodiments, the control member 7 is only opened to communicate with the first opening 61 and the second opening 62 of the connecting pipe 6 during the startup phase of the heating mode, and the heating device 8 is only opened during the startup phase of the heating mode. It is turned on to heat the refrigerant flowing through the connecting pipe 6, thereby delaying the frost formation speed in the start-up phase of the heating mode.

In some embodiments, the first opening 31 of the first heat exchanger 3 communicates with the second opening 12 of the compressor 1 through the flow direction conversion member 2 , and the second opening 502 of the second heat exchanger 5 communicates with the flow direction conversion member 2 . The first opening of the compressor 1 communicates. While the first opening 31 of the first heat exchanger 3 communicates with the first opening 11 of the compressor 1, the second opening 502 of the second heat exchanger 5 communicates with the second opening 12 of the compressor 1, and the first heat exchange While the first opening 31 of the heat exchanger 3 communicates with the second opening 12 of the compressor 1 , the second opening 502 of the second heat exchanger 5 communicates with the first opening 11 of the compressor 1 .

In other words, the first opening 31 of the first heat exchanger 3 can communicate with the first opening 11 of the compressor 1 or the second opening 12 of the compressor 1 through the flow direction conversion member 2 , but it can communicate with the first opening 12 of the compressor 1 . The first opening 11 and the second opening 12 are not in communication at the same time. The second opening 502 of the second heat exchanger 5 can be communicated with the second opening 12 of the compressor 1 through the flow direction conversion member 2, or communicated with the first opening of the compressor 1, but is connected to the first opening of the compressor 1. 11 and the second opening 12 are not in communication at the same time. Moreover, when the first opening 31 of the first heat exchanger 3 communicates with the first opening 11 of the compressor 1 , the second opening 502 of the second heat exchanger 5 needs to communicate with the second opening 12 of the compressor 1 . When the first opening 31 of the first heat exchanger 3 communicates with the second opening 12 of the compressor 1 , the second opening 502 of the second heat exchanger 5 needs to communicate with the first opening 11 of the compressor 1 .

In some specific embodiments, the flow direction conversion member 2 includes a first opening 21 , a second opening 22 , a third opening 23 and a fourth opening 24 , for example, the flow direction conversion member 2 is a four-way valve, and the flow direction conversion member 2 is a first While the opening 21 communicates with the second opening 22 , the third opening 23 and the fourth opening 24 of the flow-to-converter 2 communicate with each other. While the first opening 21 and the third opening 23 of the flow direction converter 2 communicate with each other, the second opening 22 and the fourth opening 24 of the flow direction converter 2 communicate with each other. When the first opening 21 and the second opening 22 of the flow direction converter 2 communicate with each other, the first opening 21 and the third opening 23 of the flow direction converter 2 are not in communication.

In other words, the first opening 21 of the flow direction converter 2 may communicate with the second opening 22 , and may also communicate with the third opening 23 , but not communicate with the second opening 22 and the third opening 23 at the same time. The fourth opening 24 of the flow direction converter 2 may communicate with the second opening 22 or with the third opening 23 , but not communicate with the second opening 22 and the third opening at the same time. Furthermore, when the first opening 21 and the second opening 22 of the flow direction converter 2 communicate with each other, the third opening 23 and the fourth opening 24 of the flow direction converter 2 communicate with each other. When the first opening 21 of the flow direction converter 2 communicates with the third opening 23 , the second opening 22 of the flow direction converter 2 communicates with the fourth opening 24 .

The first opening 21 of the flow-to-conversion element 2 communicates with the first opening 11 of the compressor 1 , the second opening 22 of the flow-to-conversion element 2 communicates with the first opening 31 of the first heat exchanger 3 , and the second opening 22 of the flow-to-conversion element 2 communicates with the first opening 31 of the first heat exchanger 3 . The three openings 23 communicate with the second opening 502 of the second heat exchanger 5 , and the fourth opening 24 flowing to the conversion member 2 communicates with the second opening 12 of the compressor 1 . Therefore, between the first opening 21 flowing to the conversion member 2 and the second opening 12 of the compressor 1 When the second opening 22 is in communication and the third opening 23 and the fourth opening 24 of the flow direction converter 2 are in communication, the flow direction converter 2 communicates with the first opening 11 of the compressor 1 and the first opening 31 of the first heat exchanger 3, and The second opening 12 of the compressor 1 and the second opening 502 of the second heat exchanger 5 are communicated. When the first opening 22 and the third opening 23 of the flow-to-converter 2 communicate with each other and the second opening 22 and the fourth opening 24 of the flow-to-converter 2 communicate with each other, the flow-to-converter 2 communicates with the first opening 11 and the second opening of the compressor 1 The second opening 502 of the heat exchanger 5 communicates with the second opening 12 of the compressor 1 and the first opening 31 of the first heat exchanger 3 .

When the heat exchange system is in the heating mode, the first opening 21 and the second opening 22 of the converter 2 communicate with each other, and the third opening 23 and the fourth opening 24 of the converter 2 communicate with each other, so as to communicate with the first opening 11 of the compressor 1 and the first opening 31 of the first heat exchanger 3 and communicate with the second opening 12 of the compressor 1 and the second opening 502 of the second heat exchanger 5, so that the refrigerant flowing out from the first opening 11 of the compressor 1 passes through The flow direction conversion element 2 enters the first heat exchanger 3 , and the refrigerant in the second heat exchanger 5 can be returned to the compressor 1 through the second opening 12 of the compressor 1 .

In the startup phase of the heating mode, the control element 7 is opened to communicate with the first opening 61 and the second opening 62 of the connecting pipe 6 , and the heating device 8 is opened to heat the refrigerant in the connecting pipe 6 .

During the stabilization phase of the heating mode, the control 7 is closed and the heating device 8 is switched off.

In the cooling mode, the control member 7 is turned off and the heating device 8 is turned off, the first opening 21 and the third opening 23 of the flow to the conversion member 2 are in communication and the second opening 22 and the fourth opening 24 of the flow to the conversion member 2 are communicated, so as to communicate with the compressor The first opening 11 of the compressor 1 and the second opening 502 of the second heat exchanger 5 communicate with the second opening 12 of the compressor 1 and the first opening 31 of the first heat exchanger 3, so that the The refrigerant flowing out of the opening 11 enters the second heat exchanger 5 through the flow direction conversion element 2 , and the refrigerant in the first heat exchanger 3 can be returned to the compressor 1 through the second opening 12 of the compressor 1 .

In some embodiments, the heating device 8 is a heating wire, and the heating wire is arranged in the connecting pipe 6 . In other words, in the start-up stage of the cooling mode, the refrigerant flowing through the connecting pipe 6 is heated by the electric heating wire provided in the connecting pipe 6 to convert the liquid refrigerant into a gaseous refrigerant. It can be understood that the heating device 8 of the present application is not limited to this, for example, the electric heating device 8 can also be an electric heating pipe, and the electric heating pipe is provided in the connecting pipe 6 . For another example, the electric heating device 8 may also be an electric heating belt, and the electric heating belt is wound around the outer wall of the connecting pipe 6 .

In some embodiments, the second heat exchanger 5 includes a first header 51 , a second header 52 and a plurality of heat exchange tubes 53 . The first header 51 and the second header 52 are arranged at intervals, the first header 51 is adjacent to and communicated with the first opening 501 of the second heat exchanger 5 , and the second header 52 is connected to the second heat exchanger The second opening 502 of 5 is adjacent and communicated. As shown in FIGS. 1-5 , the first header 51 and the second header 52 are generally arranged in parallel and spaced apart in the up-down direction, and the first header 51 is located below the second header 52 . The right end of the first header 51 is adjacent to the first opening 501 of the second heat exchanger 5 and communicates with the first opening 501 of the second heat exchanger 5 , and the right end of the second header 52 is adjacent to the second heat exchanger 5 The second opening 502 of the second heat exchanger 5 communicates with the second opening 502 of the second heat exchanger 5 .

A plurality of heat exchange tubes 53 are arranged at intervals along the length direction of the first header 51, and at least one heat exchange tube 53 is connected to the first header 51 at one end in the length direction thereof, and the heat exchange tube 53 is at its end. The other end in the length direction is connected to the second header 52 to communicate the first header 51 and the second header 52 . As shown in Figures 1-5, the length direction of the heat exchange tube 53 is the up-down direction, the upper end of the heat exchange tube 53 is connected to the first header 51, and the lower end of the heat exchange tube 53 is connected to the second header 52. The first header 51 and the second header 52 communicate with each other through heat exchange tubes 53 .

Specifically, the second heat exchanger 5 further includes fins 54 , and the fins 54 are arranged between adjacent heat exchange tubes 53 . By arranging the fins 54 between the adjacent heat exchange tubes 53, the heat exchange area of the two adjacent heat exchange tubes 53 can be increased, and the heat exchange efficiency can be improved.

In some specific embodiments, the second heat exchanger 5 further includes a first tube 55 and a second tube 56 . The first pipe 55 is communicated with the first header 51 , and one end of the first pipe 55 is located outside the first header 51 , and the first opening 501 of the second heat exchanger 5 is provided on the first pipe 55 . one end. As shown in FIGS. 1-5 , the upper right end of the first tube 55 is located outside the first header 51 , and the upper right end of the first tube 55 is provided with an opening to form the first opening 501 of the second heat exchanger 5 .

The second pipe 56 communicates with the second header 52 , and one end of the second pipe 56 is located outside the second header 52 , and the second opening 502 of the second heat exchanger 5 is provided on the second pipe 56 . one end. As shown in FIGS. 1-5 , the lower right end of the second pipe 56 is located outside the second header 52 , and the lower right end of the second pipe 56 is provided with an opening to form the second opening 502 of the second heat exchanger 5 .

In some embodiments, the first opening 61 of the connecting pipe 6 is provided at one end of the connecting pipe 6 , the one end of the connecting pipe 6 is connected with one end of the first pipe 55 , or the one end of the connecting pipe 6 The ends are connected with the first header 51 to communicate the connecting pipe 6 and the first header 51 .

The second opening 62 of the connecting pipe 6 is provided at the other end of the connecting pipe 6 , and the other end of the connecting pipe 6 is connected to the other end of the second pipe 56 .

As shown in FIGS. 1-5 , the first opening 61 of the connecting pipe 6 is provided on the lower end of the connecting pipe 6 , the second opening 62 of the connecting pipe 6 is provided on the upper end of the connecting pipe 6 , and the upper end of the connecting pipe 6 is connected with the first opening 62 of the connecting pipe 6 . The lower right ends of the two pipes 56 are connected to each other.

For the lower end of the connecting pipe 6 , in the embodiment shown in FIGS. 1-3 , the lower end of the connecting pipe 6 is connected to the upper right end of the first pipe 55 . In the embodiment shown in FIG. 4 and FIG. 5 , the lower end of the connecting pipe 6 is connected to the first header 51 to communicate with the connecting pipe 6 and the first header 51 . It can be understood that in this embodiment, , the first opening 501 of the second heat exchanger 5 communicates with the first opening 61 of the connecting pipe 6 through the inner cavity of the first header 51 .

In some specific embodiments, the other end of the first pipe 55 and a section adjacent to the other end are located in the first header 51 , and a section of the first pipe 55 is provided with a connection between the first pipe 55 and the The through hole of the first header 51 . As shown in FIGS. 1-5 , the left part of the first pipe 55 extends into the first header 51 , and the left part of the first pipe 55 is provided with a through hole to communicate with the first pipe 55 and the first header Tube 51. The refrigerant can enter the first header 51 through the first tube 55 and the through hole on the first tube 55 .

Further, in the embodiments shown in FIGS. 4 and 5 , in the start-up stage of the heat exchange system in the heating mode, the refrigerant flowing out from the second opening 42 of the throttle member 4 may pass through the upper right end of the first pipe 55 The opening of the first pipe 55 enters the first pipe 55, and enters the first header 51 through the through hole on the first pipe 55. The refrigerant in the first header 51 can enter the flow direction conversion member 2 through the connecting pipe 6 and pass through the flow direction conversion. Piece 2 returns to compressor 1.

In some specific embodiments, the first header 51 includes two ends that are spaced apart in its length direction, and the connection between the connecting pipe 6 and the first header 51 is far from the two ends of the first header 51 . end. As shown in FIG. 4 and FIG. 5 , the length direction of the first header 51 is the left-right direction, the first header 51 includes a left end and a right end, and the connection between the connecting pipe 6 and the first header 51 is located at the first header 51 . There is a certain distance between the left end and the right end of a header 51 and the left end of the first header 51 and a certain distance from the right end of the first header 51 .

In some embodiments, the heat exchange tube 53 is a flat tube, and the heat exchange tube 53 includes a first side surface and a second side surface arranged oppositely and a third side surface and a fourth side surface arranged oppositely. The first side surface of the heat exchange tube 53 and The distance between the second side surfaces is smaller than the distance between the third side surface and the fourth side surface of the heat exchange tube 53 . In other words, the heat exchange tubes 53 have thickness and width, and the width of the heat exchange tubes 53 is larger than the thickness of the heat exchange tubes 53 .

The heat exchange tube 53 further includes a plurality of channels arranged at intervals, and the heat exchange tube 53 communicates with the first header 51 and the second header 52 through the channels.

Specifically, each heat exchange tube 53 in the plurality of heat exchange tubes 53 communicates with the first header 51 and the second header 52 , in other words, the plurality of heat exchange tubes 53 are connected with the first header 51 and the second header 52 . The two headers 52 communicate with each other. The relationship between the connecting pipe 6 and the heat exchange pipe 53 of the second heat exchanger 5 is:

A≥0.5·n·C, where A is the flow area of the connecting pipe 6 , C is the flow area of a single heat exchange tube 53 , and n is the number of heat exchange tubes 53 in the heat exchanger.

In some embodiments, as shown in FIGS. 1-3 , the heat exchange system further includes a gas-liquid separator 9, the gas-liquid separator 9 includes a first opening and a second opening, and the first opening 91 of the gas-liquid separator 9 is connected to The flow direction converter 2 communicates with each other, and the second opening 92 of the gas-liquid separator 9 communicates with the second opening 12 of the compressor 1 . In other words, the flow direction switching member 2 communicates with the second opening 12 of the compressor 1 through the gas-liquid separator 9 .

Specifically, the fourth opening 24 of the flow direction conversion member 2 communicates with the first opening 91 of the gas-liquid separator 9 . By arranging the gas-liquid separator 9 between the flow direction converter 2 and the second opening 12 of the compressor 1, in the heating mode, the liquid refrigerant can be separated from the gaseous refrigerant and the liquid refrigerant can be retained in the gas-liquid separator 9 , and the gaseous refrigerant is returned to the compressor 1, that is, the liquid refrigerant is prevented from returning to the compressor 1, thereby reducing the risk of liquid hammer of the compressor 1.

It can be understood that the present application is not limited to the embodiments shown in FIGS. 1-5 above. The following describes a heat exchange system according to another embodiment of the present invention with reference to FIG. 6 .

As shown in FIG. 6 , and referring to the labeling of the opening in FIG. 3 , the heat exchange system according to the embodiment of the present invention includes a compressor 1 , a first heat exchanger 3 , a second heat exchanger 5 , a throttling member 4 and a flow direction The conversion part 2, the compressor 1 includes the first opening 11 and the second opening 12, the first heat exchanger 3 includes the first opening 31 and the second opening 32, the throttle part 4 includes the first opening 41 and the second opening 42, The second heat exchanger 5 includes a first opening 501 and a second opening 502 . The first opening 31 of the first heat exchanger 3 communicates with the first opening 11 of the compressor 1 through the flow direction conversion member 2 . The first heat exchanger 3 The second opening 32 of the throttling member 4 communicates with the first opening 41 of the throttle member 4, the second opening 42 of the throttling member 4 communicates with the first opening 501 of the second heat exchanger 5, and the second opening of the second heat exchanger 5 502 communicates with the second opening 12 of the compressor 1 through the flow direction switch 2 .

Specifically, adjacent devices in the heat exchange system are connected at least through pipelines, in other words, the first opening 11 of the compressor 1 and the flow direction conversion member 2 are connected through at least a first pipeline, and the flow direction conversion member 2 and the first The first openings 31 of the heat exchanger 3 are connected at least through a second pipeline, and the second opening 32 of the first heat exchanger 3 and the first opening 41 of the throttle member 4 are connected through at least a third pipeline, The second opening of the throttle member 4 and the first opening 501 of the second heat exchanger 5 are connected at least through a fourth pipeline, and the second opening 502 of the second heat exchanger 5 and the flow direction conversion member 2 are connected at least through a fourth pipeline. The fifth pipeline is connected, and the flow direction converter 2 and the second opening 12 of the compressor 1 are connected through at least a sixth pipeline.

When the heat exchange system is working, the heat exchange system is filled with refrigerant, and the refrigerant can circulate in the heat exchange system. The flow direction converter 2 is used to change the flow direction of the refrigerant in the heat exchange system. In other words, under the action of the flow direction conversion element 2, the refrigerant can flow out from the compressor 1, firstly pass through the first heat exchanger 3 and then pass through the second heat exchanger 5, and then flow back to the compressor 1, and can also flow out from the compressor 1. First, it flows back to the compressor 1 through the second heat exchanger 5 and then through the first heat exchanger 3 .

The heat exchange system further includes a heating device 8 arranged between the second opening 502 of the second heat exchanger 5 and the second opening 12 of the compressor 1 . In other words, any position between the second opening 502 of the second heat exchanger 5 and the second opening 12 of the compressor 1 in the heat exchange system, that is, any pipeline and/or device between the two, is provided with a heating device 8.

When the heat exchange system is in use, in the heating mode (frost condition), the refrigerant flowing out from the compressor 1 can enter the first heat exchanger 3 through the first opening 31 flowing to the conversion element 2 and the first heat exchanger 3 , and flows out from the second opening 32 of the first heat exchanger 3 and then enters the second heat exchanger 5 through the throttle 4 and the first opening 501 of the second heat exchanger 5 and flows from the second heat exchanger 5 through the first opening 501 of the second heat exchanger 5 The two openings 502 flow out, and return to the compressor 1 through the flow direction conversion member 2 .

In the cooling mode (defrosting condition), the refrigerant flowing from the compressor 1 can enter the second heat exchanger 5 through the second opening 502 flowing to the conversion element 2 and the second heat exchanger 5, and flows from the second heat exchanger 5 to the second heat exchanger 5. After the first opening 501 of the The conversion element 2 is returned to the compressor 1 .

Specifically, in the heating mode (frost condition), the heating device 8 is turned on to heat the refrigerant flowing through any position between the second opening 52 of the second heat exchanger 5 and the second opening 12 of the compressor 1 . In cooling mode (defrost mode), the heating device 8 is switched off.

According to the heat exchange system of the embodiment of the present invention, by disposing the heating device 8, the heating device 8 can be turned on in the heating mode to heat the second opening 52 of the second heat exchanger 5 and the second opening 12 of the compressor 1. The refrigerant at any position between them can accelerate the vaporization of the liquid refrigerant, increase the evaporation temperature, delay the frost formation speed in the heating mode, and improve the heat exchange performance.

Moreover, due to the vaporization of the liquid refrigerant, the amount of gaseous refrigerant entering the compressor 1 is increased, thereby reducing the risk of liquid hammer of the compressor.

In some specific embodiments, during the startup phase of the heating mode (frost condition), the heating device 8 is activated to heat the second opening 502 of the second heat exchanger 5 and the second opening 12 of the compressor 1 . refrigerant anywhere in between.

During the stabilization phase of the heating mode (frost condition), the heating device 8 is turned off.

It should be noted here that the heating mode includes a start-up stage and a stable stage. After the compressor 1 is turned on in the heating mode, the flow rate of the refrigerant gradually increases from a very low start and reaches a certain normal operating speed. at speed. The period from the start of compressor 1 until the flow rate of the refrigerant reaches the normal operating speed is the startup stage of the heating mode, and the period when the flow rate of the refrigerant is at the normal operating speed is the stable stage of the heating mode. According to the knowledge in the art, the startup phase of the heating mode is within 5 minutes of the startup of the heating mode.

In other words, in some specific embodiments, the heating device 8 is only turned on during the start-up phase of the heating mode to heat any position between the second opening 52 of the second heat exchanger 5 and the second opening 12 of the compressor 1 the refrigerant, thereby delaying the frost formation rate in the start-up phase of the heating mode.

In some embodiments, the first opening 31 of the first heat exchanger 3 communicates with the second opening 12 of the compressor 1 through the flow direction conversion member 2 , and the second opening 502 of the second heat exchanger 5 communicates with the flow direction conversion member 2 . The first opening of the compressor 1 communicates. While the first opening 31 of the first heat exchanger 3 communicates with the first opening 11 of the compressor 1, the second opening 502 of the second heat exchanger 5 communicates with the second opening 12 of the compressor 1, and the first heat exchange While the first opening 31 of the heat exchanger 3 communicates with the second opening 12 of the compressor 1 , the second opening 502 of the second heat exchanger 5 communicates with the first opening 11 of the compressor 1 .

In other words, the first opening 31 of the first heat exchanger 3 can communicate with the first opening 11 of the compressor 1 or the second opening 12 of the compressor 1 through the flow direction conversion member 2 , but it can communicate with the first opening 12 of the compressor 1 . The first opening 11 and the second opening 12 are not in communication at the same time. The second opening 502 of the second heat exchanger 5 can be communicated with the second opening 12 of the compressor 1 through the flow direction conversion member 2, or communicated with the first opening of the compressor 1, but is connected to the first opening of the compressor 1. 11 and the second opening 12 are not in communication at the same time. Moreover, when the first opening 31 of the first heat exchanger 3 communicates with the first opening 11 of the compressor 1 , the second opening 502 of the second heat exchanger 5 needs to communicate with the second opening 12 of the compressor 1 . When the first opening 31 of the first heat exchanger 3 communicates with the second opening 12 of the compressor 1 , the second opening 502 of the second heat exchanger 5 needs to communicate with the first opening 11 of the compressor 1 .

In some embodiments, the flow direction converting member 2 includes a first opening 21 , a second opening 22 , a third opening 23 and a fourth opening 24 , for example, the flow direction converting member 2 is a four-way valve, and the first opening 21 of the flow direction converting member 2 is a four-way valve. While communicating with the second opening 22 , the third opening 23 of the flow-to-converter 2 communicates with the fourth opening 24 . While the first opening 21 and the third opening 23 of the flow direction converter 2 communicate with each other, the second opening 22 and the fourth opening 24 of the flow direction converter 2 communicate with each other. When the first opening 21 and the second opening 22 of the flow direction converter 2 communicate with each other, the first opening 21 and the third opening 23 of the flow direction converter 2 are not in communication.

In other words, the first opening 21 of the flow direction converter 2 may communicate with the second opening 22 , and may also communicate with the third opening 23 , but not communicate with the second opening 22 and the third opening 23 at the same time. The fourth opening 24 of the flow direction converter 2 may communicate with the second opening 22 or with the third opening 23 , but not communicate with the second opening 22 and the third opening at the same time. Furthermore, when the first opening 21 and the second opening 22 of the flow direction converter 2 communicate with each other, the third opening 23 and the fourth opening 24 of the flow direction converter 2 communicate with each other. When the first opening 21 of the flow direction converter 2 communicates with the third opening 23 , the second opening 22 of the flow direction converter 2 communicates with the fourth opening 24 .

The first opening 21 of the flow-to-conversion element 2 communicates with the first opening 11 of the compressor 1 , the second opening 22 of the flow-to-conversion element 2 communicates with the first opening 31 of the first heat exchanger 3 , and the second opening 22 of the flow-to-conversion element 2 communicates with the first opening 31 of the first heat exchanger 3 . The three openings 23 communicate with the second opening 502 of the second heat exchanger 5 , and the fourth opening 24 flowing to the conversion member 2 communicates with the second opening 12 of the compressor 1 . Therefore, between the first opening 21 flowing to the conversion member 2 and the second opening 12 of the compressor 1 When the second opening 22 is in communication and the third opening 23 and the fourth opening 24 of the flow direction converter 2 are in communication, the flow direction converter 2 communicates with the first opening 11 of the compressor 1 and the first opening 31 of the first heat exchanger 3, and The second opening 12 of the compressor 1 and the second opening 502 of the second heat exchanger 5 are communicated. When the first opening 22 and the third opening 23 of the flow-to-converter 2 communicate with each other and the second opening 22 and the fourth opening 24 of the flow-to-converter 2 communicate with each other, the flow-to-converter 2 communicates with the first opening 11 and the second opening of the compressor 1 The second opening 502 of the heat exchanger 5 communicates with the second opening 12 of the compressor 1 and the first opening 31 of the first heat exchanger 3 .

In the heating mode of the heat exchange system, the first opening 21 flowing to the converter 2 communicates with the second opening 22 and the third opening 23 flowing to the converter 2 communicates with the fourth opening 24, thereby communicating with the first opening 11 of the compressor 1 and the first opening 31 of the first heat exchanger 3, and communicate with the second opening 12 of the compressor 1 and the second opening 502 of the second heat exchanger 5, so that the refrigerant flowing out from the first opening 11 of the compressor 1 It enters the first heat exchanger 3 through the flow direction conversion element 2 , and the refrigerant in the second heat exchanger 5 can be returned to the compressor 1 through the second opening 12 of the compressor 1 .

In the startup phase of the heating mode, the heating device 8 is turned on to heat the refrigerant at any position between the second opening 502 of the second heat exchanger 5 and the second opening 12 of the compressor 1 .

During the steady phase of the heating mode and the cooling mode, the heating device 8 is switched off.

In some embodiments, the heat exchange system further includes a gas-liquid separator 9, the gas-liquid separator 9 includes a first opening and a second opening, the first opening 91 of the gas-liquid separator 9 communicates with the flow direction conversion member 2, and the gas-liquid separator 9 The second opening 92 of the separator 9 communicates with the second opening 12 of the compressor 1 . In other words, the flow direction switching member 2 communicates with the second opening 12 of the compressor 1 through the gas-liquid separator 9 . Specifically, the fourth opening 24 of the flow direction conversion member 2 communicates with the first opening 91 of the gas-liquid separator 9 . By arranging the gas-liquid separator 9 between the flow direction converter 2 and the second opening 12 of the compressor 1, in the heating mode, the liquid refrigerant can be separated from the gaseous refrigerant and the liquid refrigerant can be retained in the gas-liquid separator 9 , and the gaseous refrigerant is returned to the compressor 1, that is, the liquid refrigerant is prevented from returning to the compressor 1, thereby reducing the risk of liquid hammer of the compressor 1.

As shown in FIG. 6 , the heating device 8 is provided in the gas-liquid separator 9, so that in the heating mode, the heating device 8 can be turned on to heat the liquid refrigerant in the gas-liquid separator 9 into a gaseous refrigerant, further accelerating the flow rate of the refrigerant and improving the evaporation. temperature to slow down the frost formation rate in heating mode.

In some embodiments, the heating device 8 is a heating wire, and the heating wire is arranged in the gas-liquid separator 9 . In other words, in the cooling mode, the heating wire provided in the gas-liquid separator 9 heats the refrigerant flowing through the gas-liquid separator 9 to convert the liquid refrigerant into a gaseous refrigerant. It can be understood that the heating device 8 of the present application is not limited to this, for example, the electric heating device 8 can also be an electric heating pipe, and the electric heating pipe is provided in the gas-liquid separator 9 . For another example, the electric heating device 8 may also be an electric heating belt, and the electric heating belt is wound around the outer wall of the gas-liquid separator 9 .

It can be understood that the present application is not limited to the embodiments shown in FIGS. 1-5 and 6 above. The following describes a heat exchange system according to another embodiment of the present invention with reference to FIGS. 7 and 8 .

As shown in FIG. 7 and FIG. 8 , and referring to the labeling of the opening in FIG. 3 , the heat exchange system according to the embodiment of the present invention includes a compressor 1 , a first heat exchanger 3 , a second heat exchanger 5 , and a throttling member 4 and flow direction converter 2. The compressor 1 includes a first opening 11 and a second opening 12, the first heat exchanger 3 includes a first opening 31 and a second opening 32, the throttle member 4 includes a first opening 41 and a second opening 42, and the first heat exchange The first opening 31 of the heat exchanger 3 communicates with the first opening 11 of the compressor 1 through the flow direction converting member 2 , and the second opening 32 of the first heat exchanger 3 communicates with the first opening 41 of the throttle member 4 .

The second heat exchanger 5 includes a first header 51 , a second header 52 and a plurality of heat exchange tubes 53 , the first header 51 and the second header 52 are arranged at intervals, and the first header 51 In communication with the second opening 42 of the throttle member 4 , the second header 52 communicates with the second opening 12 of the compressor 1 through the flow direction conversion member 2 . As shown in FIGS. 7 and 8 , the first header 51 and the second header 52 are arranged substantially in parallel and spaced apart in the up-down direction, and the first header 51 is positioned below the second header 52 . The right end of the first header 51 is connected to the throttle member 4 to communicate with the first header 51 and the second opening 42 of the throttle member 4 , and the right end of the second header 52 is connected to the flow direction conversion member 2 to communicate with the second opening 12 of the compressor 1 through the flow direction conversion member 2 .

A plurality of heat exchange tubes 53 are arranged at intervals along the length direction of the first header 51, and at least one heat exchange tube 53 is connected to the first header 51 at one end in the length direction thereof, and the heat exchange tube 53 is at its end. The other end in the length direction is connected to the second header 52 to communicate the first header 51 and the second header 52 . As shown in Figures 1-5, the length direction of the heat exchange tube 53 is the up-down direction, the upper end of the heat exchange tube 53 is connected to the first header 51, and the lower end of the heat exchange tube 53 is connected to the second header 52. The first header 51 and the second header 52 communicate with each other through heat exchange tubes 53 .

Specifically, the second heat exchanger 5 further includes fins 54 , and the fins 54 are arranged between adjacent heat exchange tubes 53 . By arranging the fins 54 between the adjacent heat exchange tubes 53, the heat exchange area of the two adjacent heat exchange tubes 53 can be increased, and the heat exchange efficiency can be improved.

Specifically, adjacent devices in the heat exchange system are connected at least through pipelines, in other words, the first opening 11 of the compressor 1 and the flow direction conversion member 2 are connected through at least a first pipeline, and the flow direction conversion member 2 and the first The first openings 31 of the heat exchanger 3 are connected at least through a second pipeline, and the second opening 32 of the first heat exchanger 3 and the first opening 41 of the throttle member 4 are connected through at least a third pipeline, The second opening of the throttle member 4 and the first header 51 are connected through at least a fourth pipeline, and the second header 52 and the flow direction conversion member 2 are connected at least through a fifth pipeline, and the flow direction conversion member 2 It is connected with the second opening 12 of the compressor 1 through at least a sixth pipeline.

When the heat exchange system is working, the heat exchange system is filled with refrigerant, and the refrigerant can circulate in the heat exchange system. The flow direction converter 2 is used to change the flow direction of the refrigerant in the heat exchange system. In other words, under the action of the flow direction conversion element 2, the refrigerant can flow out from the compressor 1, firstly pass through the first heat exchanger 3 and then pass through the second heat exchanger 5, and then flow back to the compressor 1, and can also flow out from the compressor 1. First, it flows back to the compressor 1 through the second heat exchanger 5 and then through the first heat exchanger 3 .

The heat exchange system further includes a heating device 8 , and the heating device 8 is arranged in the first header 51 .

When the heat exchange system is in use, in the heating mode (frost condition), the refrigerant flowing out from the compressor 1 can enter the first heat exchanger 3 through the first opening 31 flowing to the conversion element 2 and the first heat exchanger 3 , and flows out from the second opening 32 of the first heat exchanger 3 and enters the second heat exchanger 5 through the throttling member 4 and the first header 51 and flows out from the second header 52, and passes through the flow to the conversion member 2 is returned to compressor 1.

In the cooling mode (defrosting condition), the refrigerant flowing out of the compressor 1 can enter the second heat exchanger 5 through the flow direction conversion element 2 and the second header 52, and after flowing out from the first header 51, it can pass through the joint The flow element 4 and the second opening 32 of the first heat exchanger 3 enter the first heat exchanger 3 and flow out from the first opening 31 of the first heat exchanger 3 and flow back into the compressor 1 through the flow direction changeover element 2 .

Specifically, in the heating mode (frost condition), the heating device 8 is turned on to heat the refrigerant flowing through the first header 51 . In cooling mode (defrost mode), the heating device 8 is switched off.

In addition, when the heat exchange system is in use, the first header 51 is lower than the second header 52 in the direction of gravity. In other words, when the first header 51 is down and the second header 52 is up, the refrigerant entering the second heat exchanger 5 through the first header 51 needs to overcome its own gravity to flow downward to pass through the second header 51. The header 52 flows out and flows back to the compressor 1 through the flow direction conversion member 2, and the flow resistance is relatively large. In this case, by setting the heating device 8, the liquid refrigerant can be converted into a gaseous refrigerant, which increases the flow rate of the refrigerant and reduces the flow rate. resistance, which delays the frost formation speed in the heating mode and improves the heat transfer performance.

According to the heat exchange system of the embodiment of the present invention, by setting the heating device, the heating device 8 can be turned on in the heating mode to heat the refrigerant flowing through the first header 51, and the refrigerant can be converted from liquid to gaseous refrigerant, accelerating the The liquid refrigerant is vaporized, the evaporation temperature is increased, the frosting speed in the heating mode is delayed, and the heat exchange performance is improved.

Moreover, due to the vaporization of the liquid refrigerant, the amount of gaseous refrigerant entering the compressor 1 is increased, thereby reducing the risk of liquid hammer of the compressor.

In some specific embodiments, in the start-up stage of the heating mode (frosting condition), the heating device 8 provided in the first header 51 is activated to heat the refrigerant flowing through the first header 51 .

During the stabilization phase of the heating mode (frost condition), the heating device 8 is turned off.

It should be noted here that the heating mode includes a start-up stage and a stable stage. After the compressor 1 is turned on in the heating mode, the flow rate of the refrigerant gradually increases from a very low start and reaches a certain normal operating speed. at speed. The period from the start of compressor 1 until the flow rate of the refrigerant reaches the normal operating speed is the startup stage of the heating mode, and the period when the flow rate of the refrigerant is at the normal operating speed is the stable stage of the heating mode. According to the knowledge in the art, the startup phase of the heating mode is within 5 minutes of the startup of the heating mode.

In other words, in some specific embodiments, the heating device 8 is only turned on during the start-up phase of the heating mode to heat the refrigerant flowing through the first header 51 , thereby delaying the frost formation speed during the start-up phase of the heating mode.

In some embodiments, the first opening 31 of the first heat exchanger 3 communicates with the second opening 12 of the compressor 1 through the flow direction conversion member 2 , and the second opening 502 of the second heat exchanger 5 communicates with the flow direction conversion member 2 . The first opening of the compressor 1 communicates. While the first opening 31 of the first heat exchanger 3 communicates with the first opening 11 of the compressor 1, the second opening 502 of the second heat exchanger 5 communicates with the second opening 12 of the compressor 1, and the first heat exchange While the first opening 31 of the heat exchanger 3 communicates with the second opening 12 of the compressor 1 , the second opening 502 of the second heat exchanger 5 communicates with the first opening 11 of the compressor 1 .

In other words, the first opening 31 of the first heat exchanger 3 can communicate with the first opening 11 of the compressor 1 or the second opening 12 of the compressor 1 through the flow direction conversion member 2 , but it can communicate with the first opening 12 of the compressor 1 . The first opening 11 and the second opening 12 are not in communication at the same time. The second opening 502 of the second heat exchanger 5 can be communicated with the second opening 12 of the compressor 1 through the flow direction conversion member 2, or communicated with the first opening of the compressor 1, but is connected to the first opening of the compressor 1. 11 and the second opening 12 are not in communication at the same time. Moreover, when the first opening 31 of the first heat exchanger 3 communicates with the first opening 11 of the compressor 1 , the second opening 502 of the second heat exchanger 5 needs to communicate with the second opening 12 of the compressor 1 . When the first opening 31 of the first heat exchanger 3 communicates with the second opening 12 of the compressor 1 , the second opening 502 of the second heat exchanger 5 needs to communicate with the first opening 11 of the compressor 1 .

In some embodiments, the flow direction converting member 2 includes a first opening 21 , a second opening 22 , a third opening 23 and a fourth opening 24 , for example, the flow direction converting member 2 is a four-way valve, and the first opening 21 of the flow direction converting member 2 is a four-way valve. While communicating with the second opening 22 , the third opening 23 of the flow-to-converter 2 communicates with the fourth opening 24 . While the first opening 21 and the third opening 23 of the flow direction converter 2 communicate with each other, the second opening 22 and the fourth opening 24 of the flow direction converter 2 communicate with each other. When the first opening 21 and the second opening 22 of the flow direction converter 2 communicate with each other, the first opening 21 and the third opening 23 of the flow direction converter 2 are not in communication.

In other words, the first opening 21 of the flow direction converter 2 may communicate with the second opening 22 , and may also communicate with the third opening 23 , but not communicate with the second opening 22 and the third opening 23 at the same time. The fourth opening 24 of the flow direction converter 2 may communicate with the second opening 22 or with the third opening 23 , but not communicate with the second opening 22 and the third opening at the same time. Furthermore, when the first opening 21 and the second opening 22 of the flow direction converter 2 communicate with each other, the third opening 23 and the fourth opening 24 of the flow direction converter 2 communicate with each other. When the first opening 21 of the flow direction converter 2 communicates with the third opening 23 , the second opening 22 of the flow direction converter 2 communicates with the fourth opening 24 .

The first opening 21 of the flow-to-conversion element 2 communicates with the first opening 11 of the compressor 1 , the second opening 22 of the flow-to-conversion element 2 communicates with the first opening 31 of the first heat exchanger 3 , and the second opening 22 of the flow-to-conversion element 2 communicates with the first opening 31 of the first heat exchanger 3 . The three openings 23 communicate with the second header 52 , and the fourth opening 24 of the flow-to-converter 2 communicates with the second opening 12 of the compressor 1 , so that the first and second openings 21 and 22 of the flow-to-converter 2 communicate with each other. And when the third opening 23 and the fourth opening 24 of the flow direction converter 2 communicate with each other, the flow direction converter 2 communicates with the first opening 11 of the compressor 1 and the first opening 31 of the first heat exchanger 3 , and communicates with the compressor 1 . The second opening 12 and the second header 52 . When the first opening 22 and the third opening 23 of the flow-to-converter 2 communicate with each other and the second opening 22 and the fourth opening 24 of the flow-to-converter 2 communicate with each other, the flow-to-converter 2 communicates with the first opening 11 and the second opening of the compressor 1 The header 52 is connected to the second opening 12 of the compressor 1 and the first opening 31 of the first heat exchanger 3 .

In the heating mode of the heat exchange system, the first opening 21 flowing to the converter 2 communicates with the second opening 22 , and the third opening 23 flowing to the converter 2 communicates with the fourth opening 24 , thereby communicating with the first opening of the compressor 1 11 and the first opening 31 of the first heat exchanger 3, and communicate with the second opening 12 of the compressor 1 and the second header 52, so that the refrigerant flowing out from the first opening 11 of the compressor 1 passes through the flow to the conversion member 2 enters the first heat exchanger 3, and the refrigerant in the second heat exchanger 5 can be returned to the compressor 1 through the second opening 12 of the compressor 1.

In the startup phase of the heating mode, the heating device 8 is turned on to heat the refrigerant in the first header 51 .

During the steady phase of the heating mode and the cooling mode, the heating device 8 is switched off.

In some specific embodiments, the heating device 8 is an electric heating tube or an electric heating wire.

In some embodiments, the heat exchange system further includes a gas-liquid separator 9, the gas-liquid separator 9 includes a first opening and a second opening, the first opening 91 of the gas-liquid separator 9 communicates with the flow direction conversion member 2, and the gas-liquid separator 9 The second opening 92 of the separator 9 communicates with the second opening 12 of the compressor 1 . . In other words, the flow direction switching member 2 communicates with the second opening 12 of the compressor 1 through the gas-liquid separator 9 . Specifically, the fourth opening 24 of the flow direction conversion member 2 communicates with the first opening 91 of the gas-liquid separator 9 . By arranging the gas-liquid separator 9 between the flow direction converter 2 and the second opening 12 of the compressor 1, in the heating mode, the liquid refrigerant can be separated from the gaseous refrigerant and the liquid refrigerant can be retained in the gas-liquid separator 9 , while the gaseous refrigerant is returned to the compressor 1, which further prevents the liquid refrigerant from returning to the compressor 1, thereby reducing the risk of liquid hammer of the compressor 1.

In the description of this specification, description with reference to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples", etc., mean specific features described in connection with the embodiment or example , structure, material or feature is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and combine the different embodiments or examples described in this specification, as well as the features of the different embodiments or examples, without conflicting each other.

In this application, unless otherwise expressly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrated; it can be a mechanical connection or an electrical connection or can communicate with each other; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two components or the interaction relationship between the two components, unless otherwise expressly qualified. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In the description of the present application, "plurality" means at least two, such as two, three, etc., unless expressly and specifically defined otherwise.

In this application, unless otherwise expressly stated and defined, a first feature "on" or "under" a second feature may be in direct contact with the first and second features, or the first and second features indirectly through an intermediary touch. Also, the first feature being "above", "over" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

Although the embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limitations of the present invention, and those of ordinary skill in the art are within the scope of the present invention Variations, modifications, substitutions and variations can be made to the above-described embodiments.

Claims (17)

1. A heat exchange system, characterized in that it comprises a compressor, a first heat exchanger, a second heat exchanger, a throttling part and a flow direction conversion part, wherein the compressor comprises a first opening and a second opening, The first heat exchanger includes a first opening and a second opening, the throttle member includes a first opening and a second opening, the second heat exchanger includes a first opening and a second opening, and the first heat exchanger includes a first opening and a second opening. The first opening of the heat exchanger communicates with the first opening of the compressor through the flow direction conversion member, the second opening of the first heat exchanger communicates with the first opening of the throttle member, and the throttle The second opening of the component communicates with the first opening of the second heat exchanger, the second opening of the second heat exchanger communicates with the second opening of the compressor through the flow direction conversion component, and the heat exchanger communicates with the second opening of the compressor. When the heat system is working, the heat exchange system is filled with refrigerant, and the flow direction conversion element is used to change the flow direction of the refrigerant in the heat exchange system, The heat exchange system further includes a connecting pipe and a heating device, the connecting pipe includes a first opening and a second opening, and the first opening of the connecting pipe is connected to the first opening of the second heat exchanger and the joint. The second opening of the flow member communicates with the second opening of the connecting pipe, the second opening of the second heat exchanger communicates with the second opening of the connecting pipe, and the second opening of the connecting pipe communicates with the compressor through the flow direction conversion member. The second opening communicates with each other, and the heating device is arranged on the connecting pipe. 2 . The heat exchange system according to claim 1 , further comprising a control member, the control member is provided on the connecting pipe for connecting or disconnecting the first opening of the connecting pipe and the Connect the second opening of the tube. 3 . The heat exchange system according to claim 2 , wherein the first opening of the first heat exchanger communicates with the second opening of the compressor through the flow direction conversion member, and the second exchange The second opening of the heat exchanger communicates with the first opening of the compressor through the flow direction converting member, and the first opening of the first heat exchanger communicates with the first opening of the compressor while the first opening of the first heat exchanger communicates with the first opening of the compressor. The second opening of the second heat exchanger communicates with the second opening of the compressor; while the first opening of the first heat exchanger communicates with the second opening of the compressor, the second heat exchanger The second opening of the compressor communicates with the first opening of the compressor, The flow direction conversion member includes a first opening, a second opening, a third opening and a fourth opening, the first opening of the flow direction conversion member communicates with the first opening of the compressor, and the second opening of the flow direction conversion member is in communication with the first opening of the compressor. The opening communicates with the first opening of the first heat exchanger, the third opening of the flow direction conversion member communicates with the second opening of the second heat exchanger, and the fourth opening of the flow direction conversion member communicates with the The second opening of the compressor communicates, In the heating mode of the heat exchange system, the first opening of the flow direction conversion member communicates with the second opening to communicate with the first opening of the compressor and the first opening of the first heat exchanger, and the flow direction The third opening of the conversion piece communicates with the fourth opening to communicate with the second opening of the compressor and the second opening of the second heat exchanger, and the control piece is opened to communicate with the first opening of the connecting pipe and the second opening of the second heat exchanger. With the second opening, the heating device is turned on to heat the refrigerant in the connecting pipe. 4 . The heat exchange system according to claim 1 , wherein the heating device is an electric heating wire, and the electric heating wire is arranged in the connecting pipe; or the heating device is an electric heating pipe. 5 . , the electric heating pipe is arranged in the connecting pipe; or the heating device is an electric heating belt, and the electric heating belt is wound around the outer wall of the connecting pipe. 5. The heat exchange system according to any one of claims 1-3, wherein the second heat exchanger comprises: a first header and a second header, the first header and the second header being spaced apart, the first header being adjacent to the first opening of the second heat exchanger and communicated, the second header is adjacent to and communicated with the second opening of the second heat exchanger; A plurality of heat exchange tubes, the plurality of heat exchange tubes are arranged at intervals along the length direction of the first header, and at least one end of the heat exchange tube in the length direction is connected to the first header a tube is connected, and the other end of the heat exchange tube in the length direction is connected with the second header to communicate with the first header and the second header; a first pipe, the first pipe communicates with the first header, and one end of the first pipe is located outside the first header, and the first opening of the second heat exchanger provided at the one end of the first pipe; A second pipe, the second pipe communicates with the second header, and one end of the second pipe is located outside the second header, and the second opening of the second heat exchanger provided at the one end of the second pipe. 6 . The heat exchange system according to claim 5 , wherein the first opening of the connecting pipe is provided at one end of the connecting pipe, and the one end of the connecting pipe is connected to the first opening of the connecting pipe. 7 . The one end of the pipe is connected, or the one end of the connecting pipe is connected with the one end of the first header to communicate the connecting pipe and the first header, The second opening of the connecting pipe is provided at the other end of the connecting pipe, and the other end of the connecting pipe is connected to the other end of the second pipe. 7 . The heat exchange system according to claim 6 , wherein the other end of the first pipe and a section adjacent to the other end are located in the first header, and the first pipe The first section of the tube is provided with a through hole connecting the first tube and the first header. 8 . The heat exchange system according to claim 6 , wherein the first header comprises two ends spaced apart in its length direction, the connecting pipe and the first header. 9 . The connection is away from the two ends of the first header. 9 . The heat exchange system according to claim 5 , wherein the heat exchange tube is a flat tube, and the heat exchange tube comprises a first side surface and a second side surface arranged oppositely and a third side surface and a side surface arranged oppositely. 10 . the fourth side surface, the distance between the first side surface and the second side surface of the heat exchange tube is smaller than the distance between the third side surface and the fourth side surface of the heat exchange tube, and the heat exchange tube further includes a plurality of spacers an arrangement of channels through which the heat exchange tubes communicate with the first header and the second header, and each of the plurality of heat exchange tubes communicates with the first header The relationship between the flow pipe and the second header, the connecting pipe and the heat exchange pipe of the second heat exchanger is: A≥0.5·n·C, where A is the flow area of the connecting tube, C is the flow area of a single heat exchange tube, and n is the number of the heat exchange tubes in the heat exchanger. 10. A heat exchange system, characterized in that it comprises a compressor, a first heat exchanger, a second heat exchanger, a throttling part and a flow direction conversion part, wherein the compressor comprises a first opening and a second opening, The first heat exchanger includes a first opening and a second opening, the throttle member includes a first opening and a second opening, the second heat exchanger includes a first opening and a second opening, and the first heat exchanger includes a first opening and a second opening. The first opening of the heat exchanger communicates with the first opening of the compressor through the flow direction conversion member, the second opening of the first heat exchanger communicates with the first opening of the throttle member, and the throttle The second opening of the component communicates with the first opening of the second heat exchanger, the second opening of the second heat exchanger communicates with the second opening of the compressor through the flow direction conversion component, and the heat exchanger communicates with the second opening of the compressor. When the heat system is working, the heat exchange system is filled with refrigerant, and the flow direction conversion element is used to change the flow direction of the refrigerant in the heat exchange system, The heat exchange system further includes a heating device disposed between the second opening of the second heat exchanger and the second opening of the compressor. 11. The heat exchange system according to claim 10, wherein the first opening of the first heat exchanger communicates with the second opening of the compressor through the flow direction conversion member, and the second heat exchanger communicates with the second opening of the compressor. The second opening of the heater communicates with the first opening of the compressor through the flow direction conversion member, While the first opening of the first heat exchanger communicates with the first opening of the compressor, the second opening of the second heat exchanger communicates with the second opening of the compressor. While the first opening of the heat exchanger communicates with the second opening of the compressor, the second opening of the second heat exchanger communicates with the first opening of the compressor, The flow direction conversion member includes a first opening, a second opening, a third opening and a fourth opening, the first opening of the flow direction conversion member communicates with the first opening of the compressor, and the second opening of the flow direction conversion member is in communication with the first opening of the compressor. The opening communicates with the first opening of the first heat exchanger, the third opening of the flow direction conversion member communicates with the second opening of the second heat exchanger, and the fourth opening of the flow direction conversion member communicates with the The second opening of the compressor communicates, In the heating mode of the heat exchange system, the first opening of the flow direction conversion member communicates with the second opening to communicate with the first opening of the compressor and the first opening of the first heat exchanger, and the flow direction The third opening of the conversion member communicates with the fourth opening to communicate with the second opening of the compressor and the second opening of the second heat exchanger, and the heating device is turned on to connect the second opening of the second heat exchanger At least a part between the second opening of the compressor and the second opening of the compressor heats the refrigerant. 12. The heat exchange system according to claim 10 or 11, further comprising a gas-liquid separator, the gas-liquid separator comprising a first opening and a second opening, the first opening of the gas-liquid separator The opening communicates with the flow direction converting member, the second opening of the gas-liquid separator communicates with the second opening of the compressor, and the heating device is provided in the gas-liquid separator. 13. The heat exchange system according to claim 12, wherein the heating device is an electric heating wire, and the electric heating wire is arranged in the gas-liquid separator; Or the heating device is an electric heating pipe, and the electric heating pipe is arranged in the gas-liquid separator; Or the heating device is an electric heating belt, and the electric heating belt is wound around the outer wall of the gas-liquid separator. 14. A heat exchange system, characterized in that it comprises a compressor, a first heat exchanger, a second heat exchanger, a throttling part and a flow direction conversion part, wherein the compressor comprises a first opening and a second opening, The first heat exchanger includes a first opening and a second opening, the throttle element includes a first opening and a second opening, and the first opening of the first heat exchanger communicates with the compression element through the flow direction conversion element. The second opening of the first heat exchanger communicates with the first opening of the throttling member. When the heat exchange system is working, the heat exchange system is filled with refrigerant, and the The flow direction conversion element is used to change the flow direction of the refrigerant in the heat exchange system, The second heat exchanger includes a first header, a second header and a plurality of heat exchange tubes, the first header and the second header are arranged at intervals, and a plurality of the heat exchange tubes The tubes are arranged at intervals along the length direction of the first header, and at least one of the heat exchange tubes is connected to the first header at one end in the length direction thereof, the heat exchange tube being in the length direction thereof The other end of the pipe is connected to the second header to communicate with the first header and the second header, and the first header communicates with the second opening of the throttling member, The second header communicates with the second opening of the compressor through the flow direction conversion member, The heat exchange system further includes a heating device arranged in the first header. 15. The heat exchange system according to claim 14, wherein the first opening of the first heat exchanger communicates with the second opening of the compressor through the flow direction conversion member, and the second collector The flow pipe communicates with the first opening of the compressor through the flow direction conversion member, While the first opening of the first heat exchanger communicates with the first opening of the compressor, the second header communicates with the second opening of the compressor; While the first opening communicates with the second opening of the compressor, the second header communicates with the first opening of the compressor, The flow direction conversion member includes a first opening, a second opening, a third opening and a fourth opening, the first opening of the flow direction conversion member communicates with the first opening of the compressor, and the second opening of the flow direction conversion member is in communication with the first opening of the compressor. The opening communicates with the first opening of the first heat exchanger, the third opening of the flow direction conversion member communicates with the second opening of the second heat exchanger, and the fourth opening of the flow direction conversion member communicates with the The second opening of the compressor communicates, In the heating mode of the heat exchange system, the first opening of the flow direction conversion member communicates with the second opening to communicate with the first opening of the compressor and the first opening of the first heat exchanger, and the flow direction The third opening of the conversion member communicates with the fourth opening to communicate with the second opening of the compressor and the second header, and the heating device is turned on to heat the refrigerant in the first header . 16. The heat exchange system according to claim 14, wherein the heating device is an electric heating tube or an electric heating wire. 17. The heat exchange system according to any one of claims 14-16, further comprising a gas-liquid separator, the gas-liquid separator comprising a first opening and a second opening, the gas-liquid separation The first opening of the compressor communicates with the flow direction converting member, and the second opening of the gas-liquid separator communicates with the second opening of the compressor.

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