CN106813416B

CN106813416B - Multi-split system and device for reducing flowing sound of refrigerant in multi-split system

Info

Publication number: CN106813416B
Application number: CN201710005010.8A
Authority: CN
Inventors: 任林行; 许永锋; 熊美兵; 马熙华; 梁泽坤; 赵增毅
Original assignee: Midea Group Co Ltd; GD Midea Heating and Ventilating Equipment Co Ltd
Current assignee: Midea Group Co Ltd; GD Midea Heating and Ventilating Equipment Co Ltd
Priority date: 2017-01-04
Filing date: 2017-01-04
Publication date: 2020-01-07
Anticipated expiration: 2037-01-04
Also published as: CN106813416A

Abstract

The invention discloses a multi-split system and a device for reducing flowing sound of a refrigerant in the multi-split system, wherein the multi-split system comprises N indoor units, N is an integer greater than 1, and the device comprises: n first capillary, N first capillary correspond the liquid tube entrance that sets up at N indoor set. The device throttles through external capillary to improve the super-cooled rate of the refrigerant that gets into the indoor set, guarantee that the refrigerant that gets into the indoor set is liquid, thereby effectively reduce the noise that the refrigerant flows and produces, with low costs moreover, simple to operate has improved user experience greatly.

Description

Multi-split system and device for reducing flowing sound of refrigerant in multi-split system

Technical Field

The invention relates to the technical field of air conditioners, in particular to a device for reducing flowing sound of a refrigerant in a multi-split system and the multi-split system with the device.

Background

When the multi-split air conditioner system runs in a mixed mode (partial refrigerating operation of the indoor unit and partial heating operation), when the refrigerating indoor unit and the heating indoor unit are adjacent to the branch pipes, refrigerant flowing noise is generated due to insufficient supercooling of the refrigerant in the refrigerating indoor unit, and the use feeling of a user is seriously influenced by the noise.

At present, the supercooling degree of a system can be improved by adding a supercooling device for a new product so as to solve the problem of refrigerant flowing noise. However, in the installed system, it is difficult to add the supercooling means to the system due to the high installation cost and the limitation of the installation space, and thus the problem of the refrigerant flow noise cannot be solved by the supercooling means.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.

Therefore, one objective of the present invention is to provide a device for reducing flowing sound of refrigerants in a multi-split air-conditioning system, which performs throttling through an external capillary tube to improve the supercooling degree of the refrigerants entering an indoor unit and ensure that the refrigerants entering the indoor unit are in a liquid state, so as to effectively reduce noise generated by the flowing of the refrigerants, and the device has the advantages of low cost, convenient installation and greatly improved user experience.

Another object of the present invention is to provide a multi-split system.

In order to achieve the above object, an embodiment of the present invention provides an apparatus for reducing flowing sound of a refrigerant in a multi-split system, where the multi-split system includes N indoor units, where N is an integer greater than 1, and the apparatus includes: n first capillary, N first capillary corresponds the setting in the liquid tube entrance of N indoor set.

According to the device for reducing the flowing sound of the refrigerant in the multi-split system, the refrigerant entering the indoor units is throttled through the first capillary tubes correspondingly arranged at the inlets of the liquid tubes of the N indoor units, so that the supercooling degree of the refrigerant entering the indoor units is improved, the refrigerant entering the indoor units is guaranteed to be in a liquid state, the noise generated by the flowing of the refrigerant is effectively reduced, the cost is low, the installation is convenient, and the user experience is greatly improved.

According to an embodiment of the present invention, the apparatus for reducing sound of refrigerant flow in a multi-split system further includes: n second capillary, N second capillary and N first capillary correspond parallelly connected.

According to an embodiment of the present invention, the apparatus for reducing sound of refrigerant flow in a multi-split system further includes: and the N filters are correspondingly connected with the N second capillary tubes in series, and each filter in the N filters is arranged at the front end of the flowing refrigerant when the indoor unit operates in a refrigerating mode.

According to one embodiment of the invention, each of the N filters may be a dry filter.

According to an embodiment of the present invention, the apparatus for reducing sound of refrigerant flow in a multi-split system further includes: n control valves, N control valves with N second capillary corresponds the series connection.

According to an embodiment of the present invention, when there is one indoor unit in the N indoor units that operates in a cooling mode, the control valve corresponding to the indoor unit is controlled to be in an open state.

According to one embodiment of the invention, when at least two indoor units in the N indoor units run in a refrigerating mode, the average value of the outlet temperatures of the indoor heat exchangers of all the indoor units running in the refrigerating mode is obtained, wherein if the outlet temperature of the indoor heat exchanger of each indoor unit running in the refrigerating mode is larger than the sum of the average value and a first preset value, a control valve corresponding to the indoor unit is controlled to be in an open state; and if the outlet temperature of the indoor heat exchanger of the indoor unit in the refrigerating operation is smaller than the difference between the average value and the second preset value, controlling a control valve corresponding to the indoor unit to be in a closed state.

In order to achieve the above object, according to another aspect of the present invention, a multi-split air conditioning system is provided, which includes the above apparatus for reducing the sound of refrigerant flowing in the multi-split air conditioning system.

According to the multi-split system provided by the embodiment of the invention, through the device for reducing the flowing sound of the refrigerant in the multi-split system, the supercooling degree of the refrigerant entering the indoor unit can be improved, and the refrigerant entering the indoor unit is ensured to be in a liquid state, so that the noise generated by the flowing of the refrigerant is effectively reduced, the cost is low, the installation is convenient, and the user experience is greatly improved.

Drawings

Fig. 1 is a schematic structural diagram of an apparatus for reducing flowing sound of refrigerant in a multi-split system according to an embodiment of the invention;

fig. 2 is a schematic structural diagram of an apparatus for reducing flowing noise of refrigerant in a multi-split system according to another embodiment of the invention; and

fig. 3 is a schematic structural diagram of an apparatus for reducing sound of refrigerant flow in a multi-split system according to another embodiment of the invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

The apparatus for flowing sound of refrigerant in a multi-split system and the multi-split system having the same according to the embodiments of the present invention will be described with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of an apparatus for reducing sound of refrigerant flow in a multi-split system according to an embodiment of the present invention.

As shown in fig. 1, the apparatus 100 for reducing the sound of refrigerant flowing in a multi-split system may include: the N first capillaries 110, wherein the N first capillaries 110 are correspondingly disposed at the inlets of the liquid pipes of the N indoor units 120.

Specifically, a branch pipe in the multi-split system is used for dividing the refrigerant in the pipeline into the indoor units, so as to achieve the effect of dividing the refrigerant, the branch pipe is divided into an air pipe and a liquid pipe, and the air pipe is generally thicker than the liquid pipe in diameter. After the refrigerant comes out of the outdoor unit, the refrigerant is connected with the liquid pipe of the branch pipe, then is further connected with other branch pipes and the tail end indoor unit through the liquid pipe, and after the refrigerant absorbs heat in the indoor unit and becomes gas, the refrigerant flows back to the compressor through the gas pipe.

When the multi-split system operates in a mixed mode, if the refrigerating indoor unit and the heating indoor unit are arranged on adjacent branch pipes, the refrigerant entering the refrigerating indoor unit cannot be fully supercooled, and the refrigerant is a mixture of gas and liquid, so that refrigerant flowing noise is generated. In order to effectively reduce the flowing noise of the refrigerant, a supercooling device can be additionally arranged in the system to fully supercool the refrigerant, but the method is not suitable for the installed system, and is troublesome to install and cannot be installed under the condition of limited space, so that the problem of the flowing noise of the refrigerant is solved on the premise of not changing the structure of the existing whole system by externally arranging a small component.

As shown in fig. 1, a first capillary tube 110 can be connected in series to the pipeline at the inlet of the liquid pipe of each indoor unit 210 through two stop valves 310 or nuts, and throttling is performed through the capillary tube to improve the supercooling degree of the refrigerant entering the indoor unit, so that the refrigerant entering the indoor unit is in a liquid state, the flowing noise of the refrigerant is effectively reduced, and the installation is convenient without space limitation, and the cost is low, thereby greatly improving the user experience.

According to another embodiment of the present invention, as shown in fig. 2, the apparatus for reducing the sound of the refrigerant flowing in the multi-split system may further include N second capillaries 120, where the N second capillaries 120 are connected in parallel with the N first capillaries 110. Wherein the length of the second capillary 120 may be smaller than the length of the first capillary 110.

Further, as shown in fig. 2, the apparatus for reducing the flowing sound of the refrigerant in the multi-split system may further include N control valves 130, where the N control valves 130 are connected in series with the N second capillary tubes 120. Wherein, the N control valves 130 may be electromagnetic valves.

Specifically, as shown in fig. 2, the length of the first capillary tube 110 may be set to be longer to ensure that the refrigerant flowing into the refrigeration indoor unit has a supercooling degree in most cases, and the second capillary tube 120 is connected in parallel to the first capillary tube 110 and is controlled by the control valve 130 to operate or not. For example, under the throttling action of the first capillary tube 110, the supercooling degree of the refrigerant is still relatively small, and at this time, the control valve 130 may be controlled to be in an open state, so that the second capillary tube 120 participates in the throttling operation together, and the supercooling degree of the refrigerant is ensured. When the supercooling degree of the refrigerant is relatively high, the control valve 130 is closed to reduce the reduction of the system cooling effect due to the over-throttling. Therefore, the supercooling degree is adjusted, the flowing noise of the refrigerant can be effectively reduced, and the system can be ensured to have better refrigerating capacity and effect.

According to another embodiment of the present invention, as shown in fig. 3, the apparatus for reducing the sound of the refrigerant flowing in the multi-split system may further include N filters 140. The N filters 140 are connected in series with the N second capillaries 120, and each filter 140 of the N filters 140 is disposed at a front end of the refrigerant flow when the indoor unit 210 operates to cool. Wherein each of the N filters 140 may be a dry filter.

Specifically, as shown in fig. 3, a filter 140, such as a dry filter, may be provided at the front end (left side in the drawing) of the second capillary tube 120. The drying filter can comprise a molecular sieve and a filter screen, and is used for adsorbing redundant moisture in a pipeline, preventing ice blockage faults and reducing corrosion of the moisture to the refrigerating system, and simultaneously is used for filtering impurities, dust, metals and various oxides in the system to prevent the refrigerating system from generating dirty blockage faults, further changing the state of a refrigerant before entering a capillary tube, increasing the amount of a liquid refrigerant, and simultaneously automatically adjusting the supercooling degree of the refrigerant through the control valve 130 to effectively prevent the refrigerating capacity and the refrigerating effect of the system from being influenced by excessive throttling.

The control method of the control valve 130 in the above embodiment will be described in detail.

According to an embodiment of the present invention, when there is one indoor unit 210 in the N indoor units 210 operating in a cooling mode, the control valve 130 corresponding to the indoor unit 210 is controlled to be in an open state.

According to another embodiment of the present invention, when there are at least two indoor units 210 in the N indoor units 210 operating in a cooling mode, the average value of the outlet temperatures of the indoor heat exchangers (not specifically shown in the figure) of all the indoor units 210 operating in a cooling mode is obtained. If the outlet temperature of the indoor heat exchanger of the indoor unit 210 in the cooling operation is greater than the sum of the average value and the first preset value, controlling the control valve 130 corresponding to the indoor unit 210 to be in an open state; and if the outlet temperature of the indoor heat exchanger of the indoor unit 210 in the cooling operation is less than the difference between the average value and the second preset value, controlling the control valve 130 corresponding to the indoor unit 210 to be in a closed state.

The first preset value and the second preset value may be calibrated according to actual conditions, for example, the first preset value may be 3 ℃, and the second preset value may be 2 ℃.

Specifically, when the indoor units have both cooling and heating functions, when only one indoor unit 210 of the N indoor units 210 operates in a cooling mode, the control valve 130 corresponding to the indoor unit 210 is controlled to be in an open state, so that the refrigerant entering the cooling indoor unit 210 has a sufficient supercooling degree, and noise caused by the flow of the refrigerant is avoided.

When a plurality of indoor units 210 in the N indoor units 210 perform cooling operation, whether the control valve 130 needs to be controlled to be in the open state may be determined according to the temperature T2B at the outlet of the indoor heat exchanger. Specifically, first, the outlet temperatures T2B of the indoor heat exchangers of all the indoor units 210 in the cooling operation are acquired, and the average value T2 is found, and then the outlet temperatures T2B of the indoor heat exchangers of the indoor units 210 in the cooling operation are compared one by one with the average value T2. If T2B is greater than T2+3 ℃, it indicates that the supercooling degree of the refrigerant entering the indoor unit 210 is low, and the control valve 130 may be controlled to be in an open state; T2B < T2-2 ℃, which indicates that the super-cooling degree is too high, and affects the cooling effect of the indoor unit, therefore, the control valve 130 corresponding to the indoor unit 210 needs to be controlled to be in a closed state to prevent the excessive throttling from affecting the cooling capacity and the cooling effect of the indoor unit.

In summary, according to the apparatus for reducing flowing sound of refrigerant in a multi-split air conditioning system in an embodiment of the present invention, the refrigerant entering the indoor units is throttled by the capillary tubes and the like correspondingly disposed at the inlets of the liquid pipes of the N indoor units, so as to improve the supercooling degree of the refrigerant entering the indoor units, and ensure that the refrigerant entering the indoor units is in a liquid state, thereby effectively reducing noise generated by the flowing of the refrigerant, and meanwhile, the supercooling degree is adjusted by the control valve, so as to prevent the refrigeration capacity and the refrigeration effect of the indoor units from being affected by excessive throttling.

In addition, an embodiment of the present invention further provides a multi-split system, which includes the above apparatus for reducing the sound of refrigerant flowing in the multi-split system.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer 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, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

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

Claims

1. The utility model provides a reduce device that refrigerant flows sound in multi-split system which characterized in that, multi-split system includes N indoor set, wherein, N is the integer that is greater than 1, the device includes:

the N first capillary tubes are correspondingly arranged at the liquid tube inlets of the N indoor units;

n second capillaries which are correspondingly connected with the N first capillaries in parallel;

n control valves connected in series with the N second capillaries, wherein,

when one indoor unit in the N indoor units operates in a refrigerating mode, controlling a control valve corresponding to the indoor unit to be in an opening state;

when at least two indoor units in the N indoor units run in a refrigerating mode, obtaining the average value of the outlet temperatures of the indoor heat exchangers of all the indoor units running in the refrigerating mode, wherein,

if the outlet temperature of an indoor heat exchanger of the indoor unit in refrigerating operation is greater than the sum of the average value and a first preset value, controlling a control valve corresponding to the indoor unit to be in an open state;

and if the outlet temperature of the indoor heat exchanger of the indoor unit in the refrigerating operation is smaller than the difference between the average value and the second preset value, controlling a control valve corresponding to the indoor unit to be in a closed state.

2. The apparatus for reducing the sound of refrigerant flow in a multi-split air conditioning system as claimed in claim 1, further comprising:

and the N filters are correspondingly connected with the N second capillary tubes in series, and each filter in the N filters is arranged at the front end of the flowing refrigerant when the indoor unit operates in a refrigerating mode.

3. The apparatus for reducing noise of refrigerant flow in a multi-split air-conditioning system as claimed in claim 2, wherein the N filters are dry filters.

4. A multi-split system, comprising the apparatus for reducing sound of refrigerant flow in the multi-split system as claimed in any one of claims 1 to 3.