CN106918165B - Heat exchanger - Google Patents

Abstract

The invention discloses a heat exchange device, which comprises a heat exchanger core, a valve component and a first interface, wherein the heat exchanger core is provided with a first port and a second port; the plate sheets comprise a first plate sheet, a second plate sheet and a third plate sheet, the third plate sheet comprises a first blocking part and a second hole, the first blocking part is positioned at the position corresponding to the first hole of each plate sheet, the first holes of the first plate sheet and the second plate sheet are aligned to form a first hole channel, the first hole channel is divided into at least two sub-hole channels by the first blocking part, and each sub-hole channel of the first hole channel is communicated with the adjacent sub-hole channel through the second hole channel; the first circulation channel is divided into at least two heat exchange sections by the third plate, and the flow directions of fluids in the adjacent heat exchange sections are opposite; the valve assembly is located between the first port and the first hole, the first circulation area of the valve assembly is located outside the heat exchanger core and communicated with the first port, and the second circulation area of the valve assembly is communicated with the first hole. The invention has small overall dimension, better vibration resistance and better heat exchange performance.

Description

a heat exchange device

technical field

The present invention relates to the technical field of heat exchange.

Background technique

The battery of an electric vehicle will generate heat when it works and needs to be cooled. Cooling with coolant is a more common method. The usual battery cooling device includes a heat exchanger and an expansion valve. The liquid refrigerant enters the heat exchanger through the throttling action of the expansion valve. After evaporation, the cooling liquid is cooled, and the cooled cooling liquid flows to the battery pack to dissipate heat from the battery. , the temperature of the coolant rises after flowing through the battery pack and needs to be returned to the heat exchanger for cooling. Similar to the principle, these refrigeration devices are widely used in automotive air conditioners, heat pump units, multi-connected air conditioners, and electric motor thermal management. Usually, refrigerant flows through the expansion valve, and two liquids, refrigerant and coolant, flow through the heat exchanger. The refrigerant first passes through the expansion valve to generate throttling, and when it comes out of the valve, it enters the heat exchanger in a vapor-liquid two-phase state.

The existing heat exchanger and expansion valve are separate components, connected by pipes. There is a large distance between the heat exchanger and the valve, and the refrigerant in the vapor-liquid two-phase state will change its flow state during the period, such as vapor-liquid stratification, which will inevitably affect the cooling effect. In addition, it also increases the pipeline material, which makes the whole assembly less resistant to vibration and prone to pipeline breakage.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a heat exchange device with small size, better anti-vibration performance and better heat exchange performance.

In order to achieve the above purpose, the following technical solutions are adopted:

A heat exchange device comprises a plurality of stacked plates, the plates include a plurality of first plates and a plurality of second plates, the plates are stacked to form a first circulation channel and a second circulation channel, The first circulation channel and the second circulation channel are not communicated;

The heat exchange device includes a heat exchanger core, a valve assembly and a connection channel;

The plate further includes at least one third plate, the heat exchanger core includes the first plate, the second plate and the third plate arranged in layers, the first plate includes the first plate orifice, second orifice, the second plate also includes a first orifice, a second orifice, the third plate includes a first blocking part and a second orifice, the first blocking part is located at The position corresponding to the first hole of the first plate or the second plate, the first hole of the first plate and the first hole of the second plate are stacked to form a first channel, the first hole The second hole of the plate, the second hole of the second plate and the second hole of the third plate are stacked to form a second channel, and the first channel and the second channel are the first circulation A part of the channel, the first channel is divided into at least two sub-channels by the first blocking part, and each sub-channel of the first channel communicates with the adjacent sub-channels through the second channel; the first channel The circulation channel is divided into at least two heat exchange sections by the third plate, and the flow directions of the fluids in the adjacent heat exchange sections are opposite;

The valve assembly and the first interface are located on the same side of the heat exchanger core, the valve assembly includes a first flow area, a throttle area and a second flow area, and the first flow area is located on the The heat exchanger core is outside and communicated with the first interface, the second circulation area is communicated with the first orifice, and the throttle area is located between the first circulation area and the second circulation area .

The valve assembly includes a valve seat portion, the valve seat portion includes a first opening communicated with the first flow area and a second opening communicated with the second flow area, and the inner diameter of the second opening is smaller than the the inner diameter of the first hole;

The heat exchange device further includes a mounting plate and a connecting channel, the mounting plate and the valve assembly are located on the same side of the heat exchanger core; the connecting channel is formed between the mounting plate and the heat exchange Between the cores, the connection channel communicates with the first interface and the first flow area.

The valve assembly further includes a valve core assembly, the valve seat part includes a mounting part, a positioning part and a through hole formed in the middle position of the valve seat part and communicated with the first hole, the valve core assembly extending into The through hole is assembled and fixed with the mounting part, the positioning part includes a convex section and an isolation section, the convex section of the positioning part protrudes into the first hole, and the outer diameter of the convex section is Smaller than the inner diameter of the first channel, the isolation section of the positioning portion is located outside the heat exchanger core, the first opening is formed between the isolation section and the mounting portion, and the isolation section isolates the heat exchanger. the connecting channel and the first channel.

The valve seat portion is assembled and fixed with the mounting plate, the mounting plate includes a positioning hole for fixing the valve seat portion, the position of the positioning hole corresponds to the first hole, and the valve seat portion is the positioning hole extends into the first hole;

Or the valve seat portion is a part of the mounting plate; the valve seat portion protrudes from the plane of the mounting plate, the mounting portion is located on the front of the mounting plate, and the positioning portion is located at the front of the mounting plate. The reverse side, wherein the reverse side of the mounting plate is the side facing the heat exchanger core.

The first interface is located on the mounting plate and penetrates through the mounting plate. The mounting plate further includes a connecting groove, the connecting groove is located on the opposite side of the mounting plate, and the connecting groove extends from the first interface. The connecting channel is formed between the connecting groove and the heat exchanger core to the first opening of the valve seat, wherein the reverse side of the mounting plate is the side facing the heat exchanger core.

The heat exchanger core body includes a top plate and a bottom plate, the top plate and the bottom plate are located on both sides of the heat exchanger core body, the top plate is stacked with the mounting plate, and the bottom plate is located on the heat exchanger core body a side away from the mounting plate;

The protruding segment is located between the top plate and the bottom plate, and the distance between the end of the protruding segment and the third plate is smaller than the distance between the third plate and the bottom plate. distance; the isolation segment is located between the top plate and the mounting plate, and the isolation segment is adjacent to the connection channel.

The plate also includes at least one fourth plate, the heat exchanger core includes the fourth plate, the fourth plate includes a first aperture and a second blocking portion, the second blocking portion is located at the The fourth plate corresponds to the position of the second orifice of the first plate, the second plate, and the third plate. The first plate, the second plate, and the fourth plate are stacked so that all the The first hole of the first plate, the first hole of the second plate, and the first hole of the fourth plate are aligned to form a first channel, the first plate, the second plate, the third plate The plates are stacked so that the second holes of the first plate, the second holes of the second plate and the second holes of the third plate are aligned to form a second channel, and the first channel is The first blocking part is divided into at least two sub-channels, the second channel is divided into at least two sub-channels by the second blocking part, and each sub-channel of the first channel passes through the second channel and is adjacent to the adjacent channel. The sub-channels are connected, and each sub-channel of the second channel is communicated with the adjacent sub-channels through the first channel; the first circulation channel is divided into a plurality of exchange channels by the third plate and the fourth plate In the hot section, the flow direction of the fluid in the adjacent heat exchange section is opposite.

The heat exchange device further includes a second interface; the first interface and the second interface are located on different sides of the heat exchanger core, and the first interface and the valve assembly are located in the heat exchange one side of the heat exchanger core, the second interface is located on the other side of the heat exchanger core, and a fluid channel is formed between the first interface and the second interface;

The plate includes a first plate, a second plate and a third plate, the heat exchange section includes a first heat exchange section and a second heat exchange section, and the second interface is far away from the first orifice The communication of the sub-orifices of the valve assembly; the fluid channel includes the connecting channel, the first flow area, the throttle area, the second flow area, and the first orifice is adjacent to the valve assembly The sub-channel, the first heat exchange section, the second channel, the second heat exchange section, and the first channel are away from the sub-channel of the valve assembly;

Or the plate includes a first plate, a second plate, a third plate and a fourth plate, and the heat exchange section includes a first heat exchange section, a second heat exchange section and a third heat exchange section, The second interface is communicated with the sub-pore on the side of the heat exchanger core body where the second orifice is far away from the valve assembly; the fluid channel includes the connecting channel, the first flow area, the throttling area, the second flow area, the first orifice is adjacent to the sub-channel of the valve assembly, the first heat exchange section, the second orifice is adjacent to the side of the heat exchanger core where the valve assembly is located The sub-channel, the second heat exchange section, the first channel is away from the sub-channel of the valve assembly, the third heat exchange section, the second channel is away from the heat exchanger core body where the valve assembly is located. side sub-channels.

The heat exchange device further includes a first outer pipe and a second outer pipe, the first outer pipe is communicated with the first interface; the first outer pipe, the second outer pipe and the valve assembly Located on the same side of the heat exchanger core, a fluid channel is formed between the first outer pipe and the second outer pipe;

The outer diameter of the second outer pipe is smaller than the inner diameter of the second hole, and one end of the second outer pipe extends into the second hole adjacent to the side of the heat exchanger core where the valve assembly is located. The second blocking part of the fourth plate is also provided with a through hole, the nozzle of the second outer pipe is communicated with the through hole, and the pipe wall of the second outer pipe is connected with the second blocking pipe. The part is sealed and fixed; the fluid channel includes the connection channel, the first flow area, the throttling area, the second flow area, the first orifice adjacent to the sub-channel of the valve assembly, the The first heat exchange section, the second channel is adjacent to the sub-channel on the side of the heat exchanger core body where the valve assembly is located, the second heat exchange section, the first channel is away from the valve component sub-channel, The third heat exchange section and the second channel are far away from the sub-channel on the side of the heat exchanger core where the valve assembly is located.

The end of the second outer tube extending into the second hole includes a flange, and the flange has a matching portion; the flange of the second outer tube extends into the through hole, and the matching portion is connected to the through hole. The reverse side of the second blocking portion around the through hole is sealed and fixed or the flange of the second outer pipe does not extend into the through hole, and the matching portion is sealed with the front side of the second blocking portion around the through hole. Fixed; wherein the reverse side of the second blocking portion is the side facing away from the heat exchanger core where the valve assembly is located, and the front side of the second blocking portion is facing the side of the heat exchanger core where the valve assembly is located side;

Or the second blocking part includes a flange, the flange of the second blocking part is located at the periphery of the through hole, and the flange of the second blocking part has a matching part; the second outer pipe extends into the the through hole, the matching part is sealed and fixed with the outer wall of the second outer pipe; or the second outer pipe does not extend into the through hole, the matching part is sealed and fixed with the inner wall of the second outer pipe .

The above technical solution of the present invention directly integrates the valve assembly and the heat exchanger core body, eliminating the need for a long pipeline for connecting the valve assembly and the heat exchange device, and separating the first circulation channel by the third plate, so as to The flow path is increased, so that the heat exchange device has better heat exchange performance and meets the required requirements under the condition of small external dimensions.

Description of drawings

Fig. 1 is a three-dimensional schematic diagram of an embodiment of a heat exchange device;

Fig. 2 is a side view of the mounting plate of the heat exchange device shown in Fig. 1;

Fig. 3 is a partial three-dimensional structural schematic diagram of the heat exchange device shown in Fig. 1 after being cut;

FIG. 4 is a schematic partial three-dimensional structure diagram of another embodiment of the heat exchange device;

Fig. 5 is a schematic diagram of one of the plates of the heat exchange device shown in Fig. 1;

Fig. 6 is the partial enlarged schematic diagram of A in Fig. 3;

FIG. 7 is a schematic partial three-dimensional structure diagram of another embodiment of the heat exchange device;

FIG. 8 is a schematic view of the fixing method of the second outer pipe and the second blocking part of the heat exchange device shown in FIG. 2;

FIG. 9 is a schematic view of the fixing method of the second outer pipe and the second blocking part of the heat exchange device shown in FIG. 2;

Fig. 10 is a schematic diagram of the fixing method of the second outer pipe and the second blocking part of the heat exchange device shown in Fig. 2;

Fig. 11 is a schematic diagram of the fixing method of the second outer pipe and the second blocking part of the heat exchange device shown in Fig. 2;

Figure 12 is a schematic side view of the heat exchange device shown in Figure 1 in which two plates are stacked;

Figure 13 is a schematic diagram of yet another embodiment of a plate;

FIG. 14 is a partial enlarged schematic view of C in FIG. 13 .

Detailed ways

Referring to FIG. 1 , FIG. 1 is a schematic three-dimensional structure diagram of an embodiment of a heat exchange device.

The heat exchange device 100 includes a heat exchanger core 11, a valve assembly 12, a mounting plate 13, a top plate (not shown), a bottom plate 14, a first outer pipe 15, a second outer pipe 16, a third outer pipe 17 and a fourth outer pipe. Take over 18. The two sides of the heat exchanger core 11 are respectively abutted by the top plate and the bottom plate 14, and the mounting plate 13 is in contact with the top plate. Referring to FIG. 2 , the mounting plate 13 includes a plurality of mounting holes 132 , a first through hole 137 for fixedly mounting the first outer pipe 15 , a second through hole 133 for fixedly mounting the second outer pipe 16 , and a second through hole 133 for fixedly mounting A third through hole (not shown) of the third outer pipe 17 and a fourth through hole (not shown) for fixedly installing the fourth outer pipe 18 . The connection port between the first outer pipe 15 of the heat exchange device 100 and the heat exchange device is the first interface, the connection port between the second outer pipe 16 and the heat exchange device is the second interface, and the first interface shown in the figure is the first port. Hole 137, the second port shown in the figure is the second through hole 133, the valve assembly 12 is connected between the first port and the heat exchanger core, and the connection channel 151 is between the first port and the valve assembly 12 (see FIG. 3 ). ), a fluid channel is formed between the first outer pipe and the second outer pipe. The mounting plate 13 further includes a connecting groove 134 . The connecting groove 134 is located on the opposite side of the mounting plate 13 and extends from the first through hole 137 to the valve assembly 12 . The connecting groove 134 is used to form a connecting channel 151 . The reverse side of the mounting plate is the side facing the heat exchanger core 11 . It should be known that a connection channel may not be provided between the first interface and the valve assembly, and the first interface may be directly located on the valve assembly.

In order to understand the internal structure of the heat exchanger core more clearly, please refer to FIGS. 3 and 4 . FIG. 3 is a schematic partial perspective cross-sectional view of the heat exchange device 100 , and FIG. 4 is a partial three-dimensional cross-sectional schematic view of the heat exchange device 100 ′. . The heat exchanger core 11 includes a plurality of stacked plates, the plates include a plurality of first plates 111, a plurality of second plates 112 and at least one third plate 113; the first plates 111 and the second plates 111 The plates 112 are stacked to form a first circulation channel and a second circulation channel. Except for the two most edged plates, the two sides of most of the plates are respectively the first circulation channel and the second circulation channel, such as a first plate and a second circulation channel. One of the two adjacent second plates of the plate forms a first circulation channel, and the other second plate forms a second circulation channel, and the first circulation channel and the second circulation channel are not communicated. The first plate 111 and the second plate 112 each include a first orifice 23 , a second orifice 24 , a third orifice 25 , and a fourth orifice 26 . The first orifices 23 on each plate are aligned to form a first The second holes 24 on each plate are aligned to form a second channel, the third holes 25 on each plate are aligned to form a third channel, and the fourth holes 26 on each plate are aligned to form a fourth channel. Wherein, the first pores and the second pores of the heat exchanger core are communicated with the first circulation channel, and the third pores and the fourth pores are communicated with the second circulation channel. The third plate 113 includes the first blocking portion 19 a and the second hole 24 . The second hole 24 of the third plate 113 is connected to the second hole 24 of the first plate 111 and the second hole 24 of the second plate 112 . The apertures 24 are aligned to form the second apertures, the first blocking portion 19a is located at the position corresponding to the third plate and the first apertures 23 of the first and second sheets, and the first apertures of the heat exchanger core 11 are blocked by the first apertures 23 . A blocking portion 19a is divided into at least two sub-channels, the first circulation channel is divided into at least two heat exchange sections by the third plate 113, and the heat exchange section includes a first heat exchange section 101 and a second heat exchange section 102. A heat exchange section 101 communicates with one end of the first circulation channel, and a second heat exchange section 102 communicates with the other end of the first circulation channel. The fluid flow directions in the first heat exchange section 101 and the second heat exchange section 102 are opposite. The heat exchanger core is divided into at least two heat exchange sections by the first blocking part, which helps to increase the flow path of the fluid under the condition that the structure of the heat exchange device is kept small, so that the refrigerant at the outlet of the heat exchange device can flow freely. The degree of superheat meets certain requirements, so that it has better heat exchange performance.

As another embodiment, referring to FIG. 3 , the heat exchanger core 11 may further include at least one fourth plate 114 , and most of the structures of the fourth plate 114 can refer to the first plate 111 and the second plate 112. The fourth plate 114 further includes a second blocking portion 19b and a first orifice 23. The first orifice 23 of the fourth plate 114 and the first orifice 23 and the second plate 112 of the first plate 111 The first orifices 23 of the heat exchangers are aligned to form a first channel, and the second channel of the heat exchanger core 11 is divided by the second blocking portion 19b of the fourth plate 114 to form at least two sub-channels. The third plate 113 and the fourth plate 114 are located in the central area of the heat exchanger core or are arranged at a certain distance from the top plate or bottom plate, and separate the first circulation channel into three heat exchange sections. The heat exchange section includes the first The heat exchange section 101, the second heat exchange section 102 and the third heat exchange section 103, the first heat exchange section 101 communicates with one end of the first circulation channel, and the third heat exchange section 103 communicates with the other end of the first circulation channel, The second heat exchange section 102 is located between the third plate 113 and the fourth plate 114. The fluid flow direction in the first heat exchange section 101 is opposite to the fluid flow direction in the second heat exchange section 102. The second heat exchange section 102 The flow direction of the inner fluid is opposite to the flow direction of the fluid in the third heat exchange section 103 . By adding a third plate and a fourth plate inside the heat exchanger core, the first circulation channel is divided into at least three heat exchange sections, so that the heat exchange device has a small structure and effectively increases the fluid flow rate. The flow path ensures that the superheat degree of the refrigerant at the outlet of the heat exchange device meets certain requirements, so that it has better heat exchange performance.

The first plate 111 and the second plate 112 have substantially the same structure. For ease of understanding, only a certain plate 20 of the first plate or the second plate will be described in detail below. As shown in FIG. 5 , the plate 20 has an approximately square structure, and the plate 20 includes a plate plane 21 and a flange. 22, the flange 22 is located on the periphery of the board plane 21. A first orifice 23 and a second orifice 24 are formed at two positions of the board plane 21 near the corners, and two other positions near the corners of the board plane 21 are formed with protruding out of the board plane 21 to a certain extent. Height of two bosses 231. A third orifice 25 and a fourth orifice 26 are formed on the boss 231 . The first orifice 23 and the second orifice 24 may be located on the same side of the sheet or on diagonal sides. The third orifice 25 and the fourth orifice 26 can likewise be located on the same side of the plate 20 or on opposite sides. When the adjacent plates are stacked together, a part of the flange between the first plate and the second plate is in close contact with each other.

2 and 6 , the valve assembly 12 and the first interface are located on the same side of the heat exchanger core. The valve assembly 12 includes a first flow area 121 , a throttle area 123 and a second flow area 122 . The first flow area 121 is located outside the heat exchanger core 11 and communicates with the first interface, and the second circulation area 122 is communicated with the first hole. Specifically, the second circulation area 122 can be directly located in the first hole or the second circulation area Above the first orifice, the throttling area 123 is located between the first circulation area 121 and the second circulation area 122 . The valve assembly 12 includes a valve core assembly 120 and a valve seat portion 131, the valve core assembly 120 is in sealing fit with the valve seat portion 131; the valve seat portion 131 includes a first opening 131c communicating with the first flow area 121 and communicating with the second flow area The inner diameter of the second opening 131d is smaller than the inner diameter of the first hole, and the connecting groove of the mounting plate extends from the first interface to the first opening, so that the connecting channel communicates with the first flow area; the valve seat portion 131 also It includes a mounting portion 131a, a positioning portion 131b, and a through hole 138 formed in the middle of the valve seat portion and communicating with the first hole. The valve core assembly 120 extends into the through hole 138 and is assembled and fixed with the mounting portion 131a. The positioning portion 131b includes a raised segment 131b2 and an isolation segment 131b1, the raised segment 131b2 of the positioning portion 131b is located between the top plate and the bottom plate, the end of the raised segment 131b2 is located in the first hole, and the outer diameter of the raised segment 131b2 is smaller than that of the first hole. the inner diameter, and the distance between the end of the raised segment 131b2 and the third plate is smaller than the distance between the third plate and the bottom plate. The isolation section 131b1 of the positioning portion 131b is located outside the heat exchanger core. The isolation section 131b1 is especially located between the top plate and the mounting plate, and the isolation section 131b1 is close to the connecting channel 151. A first opening 131c is formed between the isolation section 131b1 and the mounting portion 131a. , the isolation section 131b1 isolates the connection channel 151 and the first hole. The convex section 131b2 is located in the first hole, which can shorten the path of the refrigerant entering the first circulation channel, and prevent the refrigerant from passing through the valve assembly from gas-liquid separation in the long pipeline; the isolation section 131b1 isolates the connecting channel from the first circulation channel. The pore channel prevents the refrigerant from directly entering the first pore channel without passing through the valve assembly; in addition, when the refrigerant enters the core of the heat exchanger, most of the refrigerant is liquid, and the liquid density is much higher than that of gas. Expansion, the flow velocity increases sharply, therefore, the distance between the convex section 131b2 and the third plate is small, which can reduce the flow velocity of the gas and achieve better heat exchange effect.

Specifically, the valve core assembly 120 and the valve seat portion 131 may be assembled and fixed, for example, a part of the valve core assembly and the mounting portion 131a of the valve seat portion 131 are screwed together. Specifically, the valve seat portion 131 is located at the position of the mounting portion 131a. A part of the inner wall 135 of the hole is provided with a threaded interface part, and a part of the outer wall of the valve core assembly is provided with a threaded part matched with the threaded interface part, so as to realize the assembly and fixation of the two. The valve core assembly 120 further includes a valve needle and a throttle hole, the valve needle and the throttle hole cooperate to form a throttle area 123, and the throttle area 123 is located between the first flow area 121 and the second flow area 122, and the throttle area is 123 can communicate with the first flow area 121 and the second flow area 122, the size of the throttling area 123 is variable, the flow rate of the fluid in the second flow area 122 is controlled by the size of the throttling area 123, and the size of the throttling area is determined by the valve needle. and the position of the orifice. The valve assembly 12 may specifically be an electronic expansion valve, and the electronic expansion valve can move the valve needle according to the working conditions, and then automatically adjust the size of the throttling area, thereby realizing the automatic change of the flow rate. The first flow area 121 may be multiple to facilitate the flow of fluid from the connection channel into the valve assembly. Sealing rings are provided between the valve assembly 12 and the mounting portion 131a and between the valve assembly 12 and the positioning portion 131b to ensure the tightness between the channels. The valve assembly is directly integrated with the heat exchanger core, so that the second flow area of the valve assembly is directly located in the first hole of the heat exchanger core, so that there is no need for pipeline connection between the valve assembly and the heat exchanger core. Make the refrigerant throttled by the valve assembly directly into the heat exchanger core to avoid the change of the flow state of the refrigerant in the gas-liquid two-phase state after throttling in the long pipeline, such as vapor-liquid stratification , thereby affecting the heat exchange effect; in addition, it also helps to enhance the anti-vibration performance of the entire heat exchange device and improve the service life of the heat exchange device.

2, the valve seat portion 131 is a part of the mounting plate 13; the valve seat portion 131 protrudes from the plane of the mounting plate 13, the mounting portion 131a is located on the front side of the mounting plate, the positioning portion 131b is located on the reverse side of the mounting plate, and the positioning portion 131b extends into In the first hole, the positioning portion 131b isolates the connecting channel 151 and the first hole, and the outer diameter of the positioning portion 131b is smaller than the inner diameter of the first hole. As another embodiment, the valve seat portion 131 and the mounting plate 13 are assembled and fixed, the mounting plate 13 includes a positioning hole for fixing the valve seat portion 131 , the position of the positioning hole corresponds to the first hole, and the valve seat portion 131 self-aligns the hole The positioning portion 131b of the valve seat portion 131 isolates the connecting channel 151 and the first hole, and the outer diameter of the positioning portion 131b is smaller than the inner diameter of the first hole. The valve seat part and the mounting plate are arranged separately or in one piece to meet different manufacturing and installation requirements. The outer diameter of the positioning part is smaller than the inner diameter of the first hole, so that the fluid can flow back into the position to be positioned after flowing out of the second flow area of the valve assembly. The plate channel that is blocked by the outside, avoids the waste of the plate channel.

The third plate and the fourth plate in the above-mentioned embodiment are square structures with approximately the same size as the first plate and the second plate. Most of the structures can refer to the first plate and the second plate. The plate and the fourth plate are generally located in the middle area of the heat exchanger core. The third and fourth plates also include a plate plane 21, a flange 22 and a boss 231, and the boss 231 protrudes from the plate plane. 21 has a certain height and the bosses 231 are located at two corners of the plate plane 21. The first orifice 23 of the third plate 113 and the second orifice 24 of the fourth plate 114 can be located on the boss or the plate plane. The same , the first blocking part 19a and the second blocking part 19b can also be located on the boss or the plate plane, the boss 231 includes a convex surface protruding from the plate plane 21 and a concave surface opposite to the convex surface. The first blocking portion 19a and the second blocking portion 19b can be part of the third plate 113 or the fourth plate 114, or can be welded with the flat surface of the third plate 113 or the fourth plate 114 or the concave surface of the boss fixed.

To meet installation requirements, the first outer pipe and the second outer pipe can be located on the same side of the heat exchanger core or on different sides. Referring to Figures 4 and 7, Figure 7 is a partial perspective sectional view of the heat exchange device 100''. Wherein, a fluid channel is formed between the first outer pipe and the second outer pipe, the first outer pipe 15 and the second outer pipe 16 They are located on different sides of the heat exchanger core 11. Specifically, as shown in Figure 4, the first outer pipe 15 is assembled and fixed with the first through hole of the mounting plate 13, and the second outer pipe 16 corresponds to the position of the first hole. , and the second outer pipe 16 is assembled and fixed with the bottom plate; the fluid channel includes a connecting channel 151, a first circulation area 121, a throttle area 123, a second circulation area 122, a sub-channel adjacent to the mounting plate of the first channel, a first heat exchange Section 101, the second channel, the second heat exchange section 102, and the first channel are adjacent to the sub-channel of the bottom plate. Or as shown in FIG. 7, the first outer tube 15 is assembled and fixed with the first through hole of the The position of the nozzle 16 corresponds to the position of the second channel, and the second outer nozzle 16 is assembled and fixed with the bottom plate 14. The fluid channel includes a connecting channel 151, a first flow area 121, a throttle area 123, a second flow area 122, and a first channel. The sub-channel adjacent to the mounting plate, the first heat exchange section 101, the second channel adjacent to the sub-channel of the mounting plate, the second heat exchange section 102, the first channel adjacent to the sub-channel of the bottom plate, the third heat exchange section 103, the second channel Sub-channels adjacent to the bottom plate.

Referring back to FIG. 3 , the first outer nozzle 15 and the second outer nozzle 16 are located on the same side of the heat exchanger core 11 . Specifically, the first outer pipe 15 and the second outer pipe 16 are assembled and fixed with the mounting plate 13; the second blocking portion 19b of the fourth plate 114 is also provided with a through hole 191, and the outer diameter of the second outer pipe 16 is smaller than that of the third plate 114. The inner diameter of the two holes, one end of the second outer pipe 16 extends into the sub-hole 110 of the second hole relatively far from the mounting plate 13, the second outer pipe 16 is sealed and fixed with the second blocking part 19b, so that the second outer pipe 16 The second interface is communicated with the through hole 191 of the second blocking portion. The second outer tube 16 and the second blocking portion are fixed by welding, for example, so that the fluid in the second outer tube is isolated from the sub-channels of the second channel adjacent to the mounting plate. Several welding methods of the second outer pipe 16 and the second blocking portion are listed below, but are not limited thereto. As shown in FIG. 8 and FIG. 9 , the end of the second outer tube 16 extending into the second hole includes a flange 161, and the flange has a matching portion; the flange of the second outer tube 16 extends into the through hole 191, The matching portion is sealed and fixed with the reverse side of the second blocking portion around the through hole 191 or the flange of the second outer nozzle 16 does not extend into the through hole, and the matching portion is sealed and fixed with the front surface of the second blocking portion around the through hole. Or as shown in FIG. 10 and FIG. 11 , the second blocking portion 19b further includes a flange 161, the flange 19b1 of the second blocking portion 19b is located around the through hole 191, and the flange of the second blocking portion has a matching portion; The outer tube 16 extends into the through hole, and the matching portion is sealed and fixed to the outer wall of the second outer tube 16 ; The reverse side of the second blocking portion faces the bottom plate, and the front side faces the mounting plate.

In addition to the above-mentioned embodiment, the plate structure may also include other structures, for example, five orifices are provided on the plate to facilitate the arrangement of the first outer pipe and the second outer pipe on the same side of the heat exchange device.

In order to increase the turbulence capacity between the plates, the turbulence capacity can be increased by arranging corrugated protrusions or concave-convex pits or other structures on the plates. For example, the plate includes a main heat exchange area located in the middle area of the plate plane, and the main heat exchange area of the plate is formed with corrugated protrusions respectively protruding from the plate plane of the first plate, the second plate, and the third plate, Taking the plate shown in FIG. 5 as an example, a plurality of corrugated protrusions 27 protruding from the plate plane 21 at a certain distance are formed on the main heat exchange area of the plate 20 . There are pits that are recessed at a certain distance from the plane of the plate. Further, the corrugated protrusion 27 is a single herringbone-shaped corrugated protrusion including a curved portion 28, and the herringbone-shaped corrugated protrusion 27 extends to the intersection of the plate plane 21 and the flange 22, so that the fluid disturbed by the corrugated protrusion It can be spread as far as possible to the edge of the plate, so that the heat exchange area formed between two adjacent plates 20 is larger and the fluid can flow uniformly at the edge of the plate, so as to improve the heat exchange performance of the heat exchange device. The chevron-shaped corrugated protrusions 27 are arranged at a certain distance from each other, and a plate plane 21 for fluid circulation is formed between the chevron-shaped corrugated protrusions 27 . Further, the spacing between each herringbone-shaped corrugated protrusions in the main heat exchange area is approximately the same, the width of each herringbone-shaped corrugated protrusions 27 is approximately the same, and the height of the protrusions of the corrugated protrusions 27 and the plate plane 21 is the same as the boss 231. The heights of the protrusions above the plate plane 21 are the same. Referring to FIG. 12 , the height h of the corrugated protrusions 27 is less than or equal to 0.9 mm, for example, the height of the corrugated protrusions ranges from 0.6 to 0.9 mm. The period of the corrugated protrusions 27 is m, and the corrugated period refers to the repeated appearance of the corrugation every distance m, the period m≤8mm, and the more specific corrugation density (ie the corrugated protrusion height/period) k<0.15. The two important parameters of heat transfer performance and flow resistance can be balanced by the constraints of the height of the corrugated bulge and the period. The corrugations that meet the above requirements can be called shallow dense corrugations, which can make enough contact points and contact areas between the two plates, and at the same time, the burst pressure of the heat exchanger formed by laminating the plates can reach more than 5Mpa. In addition, the above-mentioned shallow dense corrugations can divide the fluid into finer and more tributaries in the channel, thereby improving the uniformity of fluid distribution in the fluid channel, especially suitable for unilateral flow, that is, the first orifice and the second orifice are located in same side. In addition, the shallow dense corrugated plate is easy to process and easy to stamp and form, which effectively avoids the increase of stamping thinning rate caused by the excessive height of the corrugated protrusion, thereby avoiding the poor pressure bearing capacity of the heat exchange device. Internal leakage situation. When the heat exchange device has the above-mentioned shallow and dense corrugations, the problem of uneven fluid distribution can be improved, the heat exchange performance of the heat exchange device can be improved, and the gas at the outlet of the evaporator has a certain degree of superheat.

As another embodiment, referring to FIGS. 13 and 14 , taking the plate 20 ′ as an example, the structure of the plate 20 ′ mostly refers to the plate 20 , wherein the middle area of the two-character edge of the herringbone corrugated protrusion 27 is A platform 29 is formed, and the width d of the platform area 29 is in the range of 0.2-2 mm, specifically 1 mm. The platform area 29 at the crest of the corrugated protrusion 27 can ensure that the contact between the two plates is in surface contact when the plates are stacked, so as to ensure a larger contact area between the plates, and to ensure the strength of the solder joints during the plate welding process. Make the burst pressure of the heat exchange device higher. It should be known that the chevron-shaped corrugations are not limited to the single chevron shape mentioned above, but can also be two or more chevron-shaped corrugations, or other forms of corrugations, such as half-herringbone patterns.

It should be noted that the above embodiments are only used to illustrate the present invention and not to limit the technical solutions described in the present invention. Although the present specification has been described in detail with reference to the above-mentioned embodiments, it should be understood by those of ordinary skill in the art that those skilled in the art can still combine, modify or modify the present invention. Equivalent replacement, and all technical solutions and improvements that do not depart from the spirit and scope of the present invention should be covered within the scope of the claims of the present invention.

Claims (9)

1. A heat exchange device comprising a plurality of stacked plates, the plates comprising a plurality of first plates and a plurality of second plates, the plates are stacked to form a first circulation channel and a second circulation channel, the first circulation channel and the second circulation channel are not connected; it is characterized in that: The heat exchange device includes a heat exchanger core, a valve assembly and a first interface; The plate further includes at least one third plate, the heat exchanger core includes the first plate, the second plate and the third plate arranged in layers, the first plate includes the first plate orifice, second orifice, the second plate also includes a first orifice, a second orifice, the third plate includes a first blocking part and a second orifice, the first blocking part is located at The position of the third plate corresponds to the first hole of the first plate or the second plate, and the first plate and the second plate are stacked so that the first hole of the first plate The opening and the first orifice of the second plate are aligned to form a first channel, and the first plate, the second plate and the third plate are stacked and arranged so that the second orifice of the first plate, the second plate The second hole of the plate is aligned with the second hole of the third plate to form a second channel, the first channel and the second channel are part of the first flow channel, and the first channel is The first blocking part is divided into at least two sub-channels, each sub-channel of the first channel communicates with the adjacent sub-channels through the second channel; the first flow channel is separated by the third plate is at least two heat exchange sections, and the flow directions of fluids in adjacent heat exchange sections are opposite; The valve assembly and the first interface are located on the same side of the heat exchanger core, the valve assembly includes a first flow area, a throttle area and a second flow area, and the first flow area is located on the The heat exchanger core is outside and communicated with the first interface, the second circulation area is communicated with the first orifice, and the throttle area is located between the first circulation area and the second circulation area ; The valve assembly includes a valve seat portion, the valve seat portion includes a first opening communicated with the first flow area and a second opening communicated with the second flow area, and the inner diameter of the second opening is smaller than the the inner diameter of the first hole; The heat exchange device further includes a mounting plate and a connecting channel, the mounting plate and the valve assembly are located on the same side of the heat exchanger core; the connecting channel is formed between the mounting plate and the heat exchange between the cores, the connection channel communicates with the first interface and the first flow area; The valve assembly further includes a valve core assembly, the valve seat part includes a mounting part, a positioning part and a through hole formed in the middle position of the valve seat part and communicated with the first hole, the valve core assembly extending into The through hole is assembled and fixed with the mounting part, the positioning part includes a convex section and an isolation section, the convex section of the positioning part protrudes into the first hole, and the outer diameter of the convex section is Smaller than the inner diameter of the first channel, the isolation section of the positioning portion is located outside the heat exchanger core, the first opening is formed between the isolation section and the mounting portion, and the isolation section isolates the heat exchanger. the connecting channel and the first channel. 2. The heat exchange device according to claim 1, characterized in that: The valve seat portion is assembled and fixed with the mounting plate, the mounting plate includes a positioning hole for fixing the valve seat portion, the position of the positioning hole corresponds to the first hole, and the valve seat portion is the positioning hole extends into the first hole; Or the valve seat portion is a part of the mounting plate; the valve seat portion protrudes from the plane of the mounting plate, the mounting portion is located on the front of the mounting plate, and the positioning portion is located at the front of the mounting plate. The reverse side, wherein the reverse side of the mounting plate is the side facing the heat exchanger core. 3 . The heat exchange device according to claim 2 , wherein the first interface is located on the mounting plate and penetrates through the mounting plate, the mounting plate further comprises a connecting groove, and the connecting groove is located on the mounting plate. 4 . On the opposite side of the mounting plate, the connection groove extends from the first interface to the first opening of the valve seat, and the connection channel is formed between the connection groove and the heat exchanger core, wherein the The reverse side of the mounting plate is the side facing the heat exchanger core. 4. The heat exchange device of claim 1, wherein: The heat exchanger core body includes a top plate and a bottom plate, the top plate and the bottom plate are located on both sides of the heat exchanger core body, the top plate is stacked with the mounting plate, and the bottom plate is located on the heat exchanger core body a side away from the mounting plate; The protruding segment is located between the top plate and the bottom plate, and the distance between the end of the protruding segment and the third plate is smaller than the distance between the third plate and the bottom plate. distance; the isolation segment is located between the top plate and the mounting plate, and the isolation segment is adjacent to the connection channel. 5. The heat exchange device according to claim 1, wherein the plate further comprises at least one fourth plate, the heat exchanger core comprises the fourth plate, and the fourth plate comprises The first orifice and the second blocking portion are located at the corresponding positions of the fourth plate and the second orifices of the first, second and third plates, the The first plate, the second plate, and the fourth plate are stacked so that the first hole of the first plate, the first hole of the second plate, and the first hole of the fourth plate are aligned to form the first plate. a hole, the first plate, the second plate and the third plate are stacked so that the second hole of the first plate, the second hole of the second plate and the third plate The second orifices are aligned to form a second channel, the first channel is divided into at least two sub-channels by the first blocking portion, the second channel is divided into at least two sub-channels by the second blocking portion, and the Each sub-channel of the first channel communicates with the adjacent sub-channel through the second channel, and each sub-channel of the second channel communicates with the adjacent sub-channel through the first channel; the first circulation channel The third plate and the fourth plate are divided into a plurality of heat exchange sections, and the flow directions of the fluids in the adjacent heat exchange sections are opposite. 6. The heat exchange device according to any one of claims 1 to 5, wherein: The heat exchange device further includes a second interface; the first interface and the second interface are located on different sides of the heat exchanger core, and the first interface and the valve assembly are located in the heat exchange one side of the heat exchanger core, the second interface is located on the other side of the heat exchanger core, and a fluid channel is formed between the first interface and the second interface; The plate includes a first plate, a second plate and a third plate, the heat exchange section includes a first heat exchange section and a second heat exchange section, and the second interface is far away from the first orifice The communication of the sub-orifices of the valve assembly; the fluid channel includes the connecting channel, the first flow area, the throttle area, the second flow area, and the first orifice is adjacent to the valve assembly The sub-channel, the first heat exchange section, the second channel, the second heat exchange section, and the first channel are away from the sub-channel of the valve assembly; Or the plate includes a first plate, a second plate, a third plate and a fourth plate, and the heat exchange section includes a first heat exchange section, a second heat exchange section and a third heat exchange section, The second interface is communicated with the sub-pore on the side of the heat exchanger core body where the second orifice is far away from the valve assembly; the fluid channel includes the connecting channel, the first flow area, the throttling area, the second flow area, the first orifice is adjacent to the sub-channel of the valve assembly, the first heat exchange section, the second orifice is adjacent to the side of the heat exchanger core where the valve assembly is located The sub-channel, the second heat exchange section, the first channel is away from the sub-channel of the valve assembly, the third heat exchange section, the second channel is away from the heat exchanger core body where the valve assembly is located. side sub-channels. 7. The heat exchange device according to claim 6, characterized in that: The heat exchange device further includes a first outer pipe and a second outer pipe, the first outer pipe is communicated with the first interface; the first outer pipe, the second outer pipe and the valve assembly Located on the same side of the heat exchanger core, a fluid channel is formed between the first outer pipe and the second outer pipe; The outer diameter of the second outer pipe is smaller than the inner diameter of the second hole, and one end of the second outer pipe extends into the second hole adjacent to the side of the heat exchanger core where the valve assembly is located. The second blocking part of the fourth plate is also provided with a through hole, the nozzle of the second outer pipe is communicated with the through hole, and the pipe wall of the second outer pipe is connected with the second blocking pipe. The part is sealed and fixed; the fluid channel includes the connection channel, the first flow area, the throttling area, the second flow area, the first orifice adjacent to the sub-channel of the valve assembly, the The first heat exchange section, the second channel is adjacent to the sub-channel on the side of the heat exchanger core body where the valve assembly is located, the second heat exchange section, the first channel is away from the valve component sub-channel, The third heat exchange section and the second channel are far away from the sub-channel on the side of the heat exchanger core where the valve assembly is located. 8 . The heat exchange device according to claim 7 , wherein the end of the second outer pipe extending into the second hole includes a flange, and the flange has a matching portion; The flange of the outer pipe extends into the through hole, the matching portion is sealed and fixed with the reverse side of the second blocking portion around the through hole, or the flange of the second outer pipe does not extend into the through hole, so the The matching portion is sealed and fixed to the front side of the second blocking portion around the through hole; wherein the reverse side of the second blocking portion is the side facing away from the heat exchanger core where the valve assembly is located, and the second blocking portion is The front side of the part is facing the side of the heat exchanger core where the valve assembly is located; Or the second blocking part includes a flange, the flange of the second blocking part is located at the periphery of the through hole, and the flange of the second blocking part has a matching part; the second outer pipe extends into the the through hole, the matching part is sealed and fixed with the outer wall of the second outer pipe; or the second outer pipe does not extend into the through hole, the matching part is sealed and fixed with the inner wall of the second outer pipe . 9. The heat exchange device according to claim 8, characterized in that: The plate includes a plate plane and a flange, and the plate plane of the plate is formed with corrugated protrusions respectively protruding from the plate plane of the first plate, the second plate, and the third plate; the corrugated protrusions is a herringbone-shaped corrugated protrusion including at least one curved portion, and the herringbone-shaped corrugated protrusion extends to the intersection of the plate plane and the flange; The bulge height h≤0.9mm of the chevron-shaped corrugated protrusions, and the period m≤8mm of the chevron-shaped corrugated protrusions; and/or the curved portion of the chevron-shaped corrugated protrusions is a platform area, and the width of the platform area d range is 0.2-2mm.

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