WO2023040384A1

WO2023040384A1 - Air conditioner

Info

Publication number: WO2023040384A1
Application number: PCT/CN2022/099077
Authority: WO
Inventors: 沈英焱; 罗建文; 李旭; 张心沛; 邱爽
Original assignee: 青岛海尔空调电子有限公司; 青岛海尔空调器有限总公司; 海尔智家股份有限公司
Priority date: 2021-09-18
Filing date: 2022-06-16
Publication date: 2023-03-23
Also published as: CN216346591U

Abstract

An air conditioner, comprising an indoor unit (1), an outdoor unit (2), a gas pipeline (3), a liquid pipeline (4), a cooling branch (5) and a subcooling heat exchanger (6), and further comprising a first check valve (7) located on the gas pipeline (3) and a second check valve (8) on the cooling branch (5). Two ends of the cooling branch (5) are separately connected to the gas pipeline (3), and connection points thereof are located on two sides of the first check valve (7) respectively. Moreover, a part of the cooling branch (5) is arranged in the subcooling heat exchanger (6), and a part of the liquid pipeline (4) is arranged in the subcooling heat exchanger (6) for heat exchange. To a certain extent, the air conditioner may solve the problem of indoor noise caused by refrigerant flashing, and improve the comfort experience. Meanwhile, the effective gasification of the refrigerant in the cooling branch may also be ensured, which reduces the risk of liquid slugging and improves the operation reliability of the air conditioner.

Description

air conditioner

technical field

The utility model relates to the technical field of air conditioner noise reduction, and specifically provides an air conditioner.

Background technique

With the gradual popularization of air conditioners, people have higher and higher requirements for the comfort experience of air conditioners, and the noise problem of indoor units of air conditioners is one of the important indicators that affect the comfort experience. Therefore, to provide users with reliability Air conditioners that are stronger and more comfortable to use are the goals that major air conditioner manufacturers are constantly pursuing.

Existing air conditioners usually include liquid pipes and gas pipes. When the air conditioner is in cooling mode, the heat transfer performance of the outdoor unit is an important factor that easily causes refrigerant noise in the indoor unit. When the outdoor unit When the heat exchange effect of the air conditioner is not good, when the refrigerant in the liquid pipe enters the indoor heat exchanger, flashing of the refrigerant often occurs, resulting in excessive noise of the indoor unit, which affects the comfort experience of the air conditioner.

Accordingly, a new air conditioner is needed in the art to solve the above problems.

Utility model content

The utility model aims to solve the above-mentioned technical problem, that is, to solve the problem that the existing air conditioner is prone to indoor noise due to refrigerant flashing phenomenon.

The utility model provides an air conditioner, which includes an indoor unit, an outdoor unit, a gas pipe, a liquid pipe, a cooling branch and a subcooling heat exchanger. The gas pipe and the liquid pipe are arranged in the Between the indoor unit and the outdoor unit, the outdoor unit includes an outdoor pipeline, a compressor arranged on the outdoor pipeline, an outdoor heat exchanger, and a first throttling member, and the indoor unit includes an indoor pipeline and an indoor heat exchanger arranged on the indoor pipeline, a first one-way valve is set on the air pipe line, a second one-way valve is set on the cooling branch, and the two ends of the cooling branch are respectively connected to The air pipes are connected and their connection points are respectively located on both sides of the first check valve, and a part of the cooling branch is arranged in the subcooling heat exchanger, and a part of the liquid pipe is Set in the subcooling heat exchanger for heat exchange.

In the preferred technical solution of the above-mentioned air conditioner, the subcooling heat exchanger includes a shell, and a heat exchange cavity is formed in the shell, and a part of the cooling branch and a part of the liquid pipe are arranged In the heat exchange cavity, heat exchange is performed.

In a preferred technical solution of the above air conditioner, the heat exchange cavity is filled with a heat exchange medium.

In a preferred technical solution of the air conditioner above, the air conditioner further includes a second throttling member, and the second throttling member is arranged on the liquid pipe.

In a preferred technical solution of the above air conditioner, the first throttling member and/or the second throttling member is an electronic expansion valve.

In the preferred technical solution of the above-mentioned air conditioner, the air conditioner further includes a liquid separating member, the liquid separating member is arranged on the indoor pipeline, and is located between the second throttling member and the indoor heat exchanger between.

In a preferred technical solution of the air conditioner above, the air conditioner further includes a filter, and the filter is arranged on the liquid pipe.

In a preferred technical solution of the above air conditioner, the number of the filters is two, and the two filters are respectively located on both sides of the second throttling member.

In a preferred technical solution of the above air conditioner, the indoor unit further includes a temperature sensor capable of detecting the temperature of the indoor heat exchanger.

In the preferred technical solution of the above-mentioned air conditioner, the number of the temperature sensors is three, and the three temperature sensors are set to be able to detect the main body temperature, liquid inlet temperature and liquid outlet temperature of the indoor heat exchanger.

In the case of adopting the above technical solution, the air conditioner of the present invention includes an indoor unit, an outdoor unit, a gas pipeline, a liquid pipeline, a cooling branch and a subcooling heat exchanger, the gas pipeline and the liquid The pipeline is arranged between the indoor unit and the outdoor unit, the outdoor unit includes an outdoor pipeline, a compressor, an outdoor heat exchanger and a first throttling member arranged on the outdoor pipeline, and the The indoor unit includes an indoor pipeline and an indoor heat exchanger arranged on the indoor pipeline, a first one-way valve is set on the air pipeline, a second one-way valve is set on the cooling branch, and the cooling branch The two ends of the path are respectively connected to the gas pipe, and the connection points are respectively located on both sides of the first check valve, and a part of the cooling branch is arranged in the subcooling heat exchanger, the A part of the liquid pipe line is arranged in the subcooling heat exchanger for heat exchange. Based on the above structural configuration, the air conditioner of the present invention makes the liquid pipe The pipeline and a part of the cooling branch are arranged in the subcooling heat exchanger, which can solve or effectively alleviate the indoor noise problem caused by the flashing of the refrigerant to a certain extent, and improve the comfort experience of the user; at the same time It can also ensure that the refrigerant in the cooling branch is effectively vaporized, and the suction dryness is increased, that is, it can effectively balance the circulation pressure of the refrigerant, reduce the impact of refrigerant migration, and reduce the occurrence of liquid hammer when the compressor is cold started. risk, improving the reliability of the operation of the air conditioner.

Description of drawings

Describe preferred embodiment of the present utility model below in conjunction with accompanying drawing, in accompanying drawing:

Fig. 1 is the structural representation of the air conditioner of the present utility model;

Reference signs:

1. Indoor unit; 110. Indoor pipeline; 120. Indoor heat exchanger; 130. Indoor fan; 140. Second throttling member; 2. Outdoor unit; 3. Gas pipe pipeline; 4. Liquid pipe pipeline; 5 1. Cooling branch; 6. Subcooling heat exchanger; 7. First one-way valve; 8. Second one-way valve; 9. Liquid separator; 10. Filter; 11. Temperature sensor.

Detailed ways

Preferred embodiments of the present utility model are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principle of the utility model, and are not intended to limit the protection scope of the utility model. Those skilled in the art can make adjustments as needed so as to adapt to specific applications. For example, the utility model does not impose any restrictions on the specific application objects of the air conditioner. The air conditioner of the utility model can be a wall-mounted air conditioner or a vertical air conditioner, and technicians can set it by themselves according to actual use requirements. The change of this specific application object does not deviate from the basic principle of the utility model, and belongs to the protection scope of the utility model.

It should be noted that, in the description of the present utility model, terms such as "middle", "upper", "lower", "both sides" and other indicated directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings , which is only for the convenience of description, and does not indicate or imply that the device or supply must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

In addition, it should be noted that in the description of the present utility model, unless otherwise specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection or a flexible connection. Disassembled connection; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations. In addition, the terms "first" and "second" are used for descriptive purposes only, and should not be understood as indicating or implying relative importance.

Based on the problem that existing air conditioners are prone to noise due to refrigerant flash phenomenon mentioned in the background technology, the utility model provides a new air conditioner, which aims to effectively solve the problem that the air conditioner is prone to noise due to refrigerant flash phenomenon. Indoor noise problems that arise.

Referring to Fig. 1, Fig. 1 is a schematic structural view of the air conditioner of the present invention. As shown in Figure 1, the air conditioner includes an indoor unit 1 (the part shown in the lower dashed box), an outdoor unit 2 (the part shown in the upper dashed box), a gas pipe line 3, a liquid pipe line 4, The cooling branch 5 and the subcooling heat exchanger 6, the air pipe line 3 and the liquid pipe line 4 are arranged between the indoor unit 1 and the outdoor unit 2; the outdoor unit 2 includes an outdoor pipeline (not shown) and a set A compressor, an outdoor heat exchanger and a first throttling member (not shown in the figure) on the outdoor pipeline, the indoor unit 1 includes an indoor pipeline 110 and an indoor heat exchanger 120 arranged on the indoor pipeline 110 , an indoor fan 130 is installed near the indoor heat exchanger 120 to supply air to the room; the air pipe line 3 is provided with a first one-way valve 7, and the cooling branch 5 is provided with a second one-way valve 8, and the cooling branch The two ends of the road 5 are respectively connected with the air pipe line 3 and its connection points are respectively located on both sides of the first one-way valve 7, and a part of the cooling branch 5 is arranged in the subcooling heat exchanger 6, and the liquid pipe line 4 A part of it is arranged in the subcooling heat exchanger 6 for heat exchange; the outdoor pipeline, gas pipeline 3, indoor pipeline 110 and liquid pipeline 4 are connected to form the heat exchange cycle of the air conditioner circuit.

It should be noted that the utility model does not impose any restrictions on the specific structures of the indoor unit 1 and the outdoor unit 2, and technicians can set them by themselves according to the actual situation; for example, the outdoor unit 2 may include but is not limited to the outdoor pipeline, The compressor, the outdoor heat exchanger, and the first throttling member may also include other structures, such as capillary components, four-way valves, etc., which are not limiting. It should also be noted that the utility model does not impose any restrictions on the specific types of the indoor heat exchanger 120 and the outdoor heat exchanger, which can be a plate heat exchanger, or a casing heat exchanger, or a Fin heat exchanger. In addition, the utility model also does not impose any restrictions on the specific type and structure of the first one-way valve 7 and the second one-way valve 8, the first one-way valve 7 and the second one-way valve 8 can be vertical one-way valves, It can also be a horizontal check valve, a swing check valve, a lift check valve, or a butterfly check valve, and technicians can set it by themselves according to the actual situation.

Specifically, as a preferred embodiment, the subcooling heat exchanger 6 includes a housing in which a heat exchange cavity is formed, a part of the cooling branch 5 and a part of the liquid pipe 4 are arranged on the In the heat exchange cavity, the heat exchange cavity is filled with a heat exchange medium to improve heat exchange efficiency through the heat exchange medium, and the heat exchange medium is preferably water. Further preferably, the cooling branch 5 and the liquid pipe 4 located in the heat exchange cavity are spirally arranged, so as to further improve the heat exchange effect. Of course, this is only a preferred setting method, and the present invention does not impose any restrictions on the specific structure of the subcooling heat exchanger 6, and technicians can set it by themselves according to the actual situation. In the air conditioner of the present utility model, a part of the liquid pipe line 4 and the cooling branch 5 are set through the co-setting of the subcooling heat exchanger 6, the cooling branch 5, the first check valve 7 and the second check valve 8 In the subcooling heat exchanger 6, the indoor noise problem caused by the flashing of the refrigerant can be solved or effectively alleviated to a certain extent, and the comfort experience of the user can be improved; at the same time, the effective gas flow of the refrigerant in the cooling branch 5 can be ensured. The dryness of the suction air increases, that is, it can effectively balance the refrigerant pressure in the heat exchange cycle, reduce the impact of refrigerant migration, reduce the risk of liquid hammer when the compressor is cold started, and improve the performance of the air conditioner. operational reliability.

Continue to refer to Fig. 1, further, the air conditioner also includes a second throttling member 140, the second throttling member 140 is arranged on the liquid pipe pipeline 4, the utility model arranges the second throttling member 140 on the indoor unit 1, can further effectively reduce the refrigerant noise generated by the air conditioner indoors, thereby effectively improving the comfort experience of users. In this preferred embodiment, the first throttling member and the second throttling member 140 are electronic expansion valves in order to better regulate the flow of refrigerant in the outdoor pipeline and the liquid pipeline 4, but it needs to be explained It is noted that the present utility model does not impose any limitation on the specific type and structure of the first throttling member and the second throttling member 140, and the first throttling member and the second throttling member 140 can also be thermodynamic expansion Valve or float regulating valve, technicians can set it by themselves according to the actual demand of the air conditioner.

Preferably, the air conditioner further includes a liquid separating member 9, the liquid separating member 9 is arranged on the indoor pipeline 110, and is located between the second throttle member 140 and the indoor heat exchanger 120, so as to effectively solve the problem of the indoor pipeline 110 The problem of uneven liquid separation. The air conditioner also includes a filter 10, and the filter 10 is arranged on the liquid pipe line 4; specifically, the number of the filter 10 is two, and the two filters are respectively located on both sides of the second throttling member 140 , so as to effectively ensure the smooth circulation of the refrigerant flowing through the second throttling member 140 , so that the normal operation of the air conditioner will not be affected due to blockage, and at the same time, the refrigerant noise generated by the second throttling member 140 can be further reduced. Of course, it should also be noted that the utility model does not impose any restrictions on the specific structure of the filter 10 and its setting quantity, and its setting quantity can also be three, four, or even more. The flow situation of the user can be set by itself.

Further, the air conditioner also includes a temperature sensor 11, which can detect the temperature of the indoor heat exchanger 120; specifically, in order to show the temperature situation of the indoor heat exchanger 120 more comprehensively and accurately, the setting of the temperature sensor 11 The number is three, wherein one temperature sensor 11 is arranged near the coil pipe of the indoor heat exchanger 120, and the other two temperature sensors 11 are respectively arranged at the inlet section and the outlet section of the indoor heat exchanger 120 to effectively detect the temperature of the indoor heat exchanger. 120 body temperature, liquid inlet temperature and liquid outlet temperature.

When the air conditioner is in cooling mode, the circulation sequence of the refrigerant is as follows: outdoor unit 2→subcooling heat exchanger 6→second throttling member 140→liquid separating member 9→indoor heat exchanger 120→second check valve 8→subcooling heat exchanger 6→outdoor unit 2. First, the high-temperature and high-pressure liquid refrigerant in the outdoor pipeline of the outdoor unit 2 flows into the liquid pipe 4, and the refrigerant in the liquid pipe 4 and the refrigerant in the cooling branch 5 exchange heat in the subcooling heat exchanger 6 In order to increase the subcooling degree of the liquid refrigerant, the refrigerant flows into the second throttling member 140 after being filtered by the filter 10, the temperature and pressure of the refrigerant are lowered, and the refrigerant is filtered by the filter 10 again before flowing into the indoor pipeline 110, and the refrigerant flows through After being distributed by the liquid separating member 9, it flows into the indoor heat exchanger 120, and is assisted by the indoor fan 130 to perform heat exchange. After being converted into a low-temperature and low-pressure gaseous refrigerant, it flows into the air pipe line 3, and the gaseous refrigerant is regulated by the second check valve 8. The flow direction flows into the cooling branch 5 and exchanges heat with the refrigerant in the liquid pipe 4 in the subcooling heat exchanger 6, and finally returns to the outdoor unit 2 through the air pipe 3 to complete a refrigeration cycle.

When the air conditioner is in heating mode, the circulation of the refrigerant is as follows: outdoor unit 2→first check valve 7→indoor heat exchanger 120→liquid separating member 9→second throttling member 140→subcooling heat exchanger 6→Outdoor unit 2. First, the high-temperature and high-pressure gaseous refrigerant in the outdoor pipeline of the outdoor unit 2 flows into the air pipe pipeline 3, and the flow direction of the gaseous refrigerant is regulated by the first check valve 7 to reduce the impact of the subcooling heat exchanger 6 on the indoor heat exchanger 120. Influenced by the heat exchange effect, it continues to flow into the indoor pipeline 110 through the air pipe pipeline 3, with the assistance of the indoor fan 130 for heat exchange, converted into liquid refrigerant, distributed by the liquid separation member 9, and then flows into the liquid pipe pipeline 4 , and then the refrigerant flows into the second throttling member 140 after being filtered by the filter 10, flows into the subcooling heat exchanger 6 after being filtered by the filter 10 again, and finally returns to the outdoor unit 2 through the liquid pipe 4, completing a cycle heating cycle.

In addition, it should also be noted that the utility model does not impose any restrictions on the specific use of the air conditioner, and technicians can set it according to actual use requirements. The change of this specific use method does not deviate from the utility model The basic principles should belong to the protection scope of the present utility model.

So far, the technical solution of the utility model has been described in conjunction with the preferred implementations shown in the accompanying drawings, however, those skilled in the art can easily understand that the protection scope of the utility model is obviously not limited to these specific implementations. On the premise of not departing from the principle of the utility model, those skilled in the art can make equivalent changes or substitutions to relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of the utility model.

Claims

An air conditioner, characterized in that it includes an indoor unit, an outdoor unit, a gas pipe, a liquid pipe, a cooling branch and a subcooling heat exchanger,

The gas pipeline and the liquid pipeline are arranged between the indoor unit and the outdoor unit, and the outdoor unit includes an outdoor pipeline, a compressor arranged on the outdoor pipeline, and an outdoor heat exchanger and a first throttling member, the indoor unit includes an indoor pipeline and an indoor heat exchanger arranged on the indoor pipeline,

The air pipe is provided with a first one-way valve, and the cooling branch is provided with a second one-way valve. On both sides of the first one-way valve, and a part of the cooling branch is set in the subcooling heat exchanger, and a part of the liquid pipe is set in the subcooling heat exchanger to exchange hot.
The air conditioner according to claim 1, wherein the subcooling heat exchanger comprises a casing, a heat exchange cavity is formed in the casing, a part of the cooling branch and the liquid pipe A part of the path is arranged in the heat exchange cavity for heat exchange.
The air conditioner according to claim 2, wherein the heat exchange cavity is filled with a heat exchange medium.
The air conditioner according to any one of claims 1 to 3, characterized in that the air conditioner further comprises a second throttling member, and the second throttling member is arranged on the liquid pipe.
The air conditioner according to claim 4, wherein the first throttling member and/or the second throttling member is an electronic expansion valve.
The air conditioner according to claim 4, characterized in that the air conditioner further comprises a liquid separation member, the liquid separation member is arranged on the indoor pipeline, and is located between the second throttling member and the indoor air conditioner. between the heat exchangers.
The air conditioner according to claim 4, characterized in that the air conditioner further comprises a filter, and the filter is arranged on the liquid pipe.
The air conditioner according to claim 7, characterized in that there are two filters, and the two filters are respectively located on two sides of the second throttling member.
The air conditioner according to claim 4, wherein the indoor unit further includes a temperature sensor capable of detecting the temperature of the indoor heat exchanger.
The air conditioner according to claim 9, characterized in that the number of the temperature sensors is three, and the three temperature sensors are set to be able to detect the main body temperature, liquid inlet temperature and liquid outlet temperature of the indoor heat exchanger temperature.