Heat exchange system and air conditioner

Abstract

The utility model relates to the technical field of heat exchange systems, and discloses a heat exchange system and an air conditioner. The heat exchange loop comprises a compressor, an indoor heat exchanger, an indoor throttling device, an outdoor throttling device and an outdoor heat exchanger which are sequentially connected through a refrigerant pipeline; two ends of the auxiliary heat exchanger are respectively connected with the indoor throttling device and the outdoor throttling device; the first end of the liquid storage device is connected with the air return end of the compressor, the second end of the liquid storage device is connected with a refrigerant pipeline between the indoor throttling device and the outdoor throttling device, and a refrigerant in the first end of the liquid storage device can exchange heat with the auxiliary heat exchanger. According to the embodiment, the quantity of the refrigerant participating in the heat exchange circulation can be adjusted through the liquid storage device, so that the reasonability of the quantity of the refrigerant participating in the heat exchange circulation under different working conditions of the heat exchange system is improved, and the energy efficiency of the heat exchange system is improved.

Description

Technical Field

[0001] The present application relates to the technical field of heat exchange systems, for example, to a heat exchange system and an air conditioner. Background Art

[0002] The refrigerant in the air conditioning system circulates in the system to achieve cooling or heating operation mode. When the air conditioner is running in cooling mode with different loads or heating mode with different loads, the optimal refrigerant circulation volume required by the heat exchange system is different, but for the heat exchange system, the refrigerant filling volume is fixed. When the outside temperature of the cooling system is high or the outside temperature of the heating system is low, the rated refrigerant volume may cause the air conditioning system to overload, resulting in poor cooling or heating effects; and when the outside temperature of the cooling system is low or the outside temperature of the heating system is high, the air conditioning system is running at low load, and the amount of refrigerant may be in a surplus situation. This part of the refrigerant does not play a role in heat exchange during system operation, resulting in low energy efficiency of the temperature control equipment unit and failure to bring into play the optimal performance of the heat exchange system.

[0003] In the related art, the refrigerant in the heat exchange system is generally regulated by adjusting the opening of the throttle to reduce the pressure, cool down or increase the pressure and heat the refrigerant, so that the refrigerant state meets the needs of the indoor heat exchanger and puts the heat exchange system in a relatively good state.

[0004] In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the related art:

[0005] Since the throttle opening adjustment capability is limited and the adjustment range is small, when the refrigerant required by the heat exchange system varies greatly, the throttle cannot meet the refrigerant adjustment requirements and the performance of the heat exchange system is poor.

[0006] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0007] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0008] The disclosed embodiment provides an air conditioner with a heat exchange system to adjust the amount of refrigerant participating in a heat exchange cycle in the heat exchange system and improve the performance of the heat exchange system.

[0009] According to the first embodiment provided in the present application, a heat exchange system is provided, which includes: a heat exchange circuit, including a compressor, an indoor heat exchanger, an indoor throttling device, an outdoor throttling device and an outdoor heat exchanger connected in sequence through a refrigerant pipeline; an auxiliary heat exchanger, whose two ends are respectively connected to the indoor throttling device and the outdoor throttling device; a liquid storage device, whose first end is connected to the return air end of the compressor, and whose second end is connected to the refrigerant pipeline between the indoor throttling device and the outdoor throttling device, wherein the refrigerant in the first end of the liquid storage device can exchange heat with the auxiliary heat exchanger.

[0010] In some optional embodiments, the liquid storage device includes: a liquid storage tank;

[0011] a first refrigerant pipeline, a first end of which is connected to the refrigerant pipeline between the indoor throttling device and the outdoor throttling device, and a second end of which is connected to the liquid storage tank;

[0012] A second refrigerant pipeline, a first end of which is connected to the return air end of the compressor, and a second end of which is connected to the liquid storage tank;

[0013] The second refrigerant pipeline cooperates with the auxiliary heat exchanger to adjust the temperature of the refrigerant in the second refrigerant pipeline flowing into the return air end of the compressor.

[0014] In some optional embodiments, the liquid storage device further includes: a second valve, disposed on the second refrigerant pipeline.

[0015] In some optional embodiments, the second refrigerant pipeline includes: a first sub-refrigerant pipeline, a first end of which is connected to the return air end of the compressor, a second end of which is connected to the lower end of the liquid storage tank, a second valve is provided on the first sub-refrigerant pipeline, and the first sub-refrigerant pipeline cooperates with the auxiliary heat exchanger;

[0016] The second sub-refrigerant pipeline has a first end connected to the first sub-refrigerant pipeline and a second end connected to the upper end of the liquid storage tank; wherein the connection position between the second sub-refrigerant pipeline and the first sub-refrigerant pipeline is located upstream of the matching position between the first sub-refrigerant pipeline and the auxiliary heat exchanger.

[0017] In some optional embodiments, the liquid storage device further includes: a third valve, disposed in the second sub-refrigerant pipeline.

[0018] In some optional embodiments, the second end of the second refrigerant pipeline is connected to the lower end of the liquid storage tank, and the liquid storage device also includes: a third refrigerant pipeline, the first end of which is connected to the return air end of the compressor and the first end is connected to the upper end of the liquid storage tank.

[0019] In some optional embodiments, the liquid storage device further includes: a fourth valve, disposed on the third refrigerant pipeline.

[0020] In some optional embodiments, the third refrigerant pipeline is cooperated with the auxiliary heat exchanger to adjust the temperature of the refrigerant in the third refrigerant pipeline flowing into the return air end of the compressor. The third refrigerant pipeline is arranged adjacent to the second refrigerant pipeline, or the third refrigerant pipeline and the second refrigerant pipeline are respectively arranged on opposite sides of the auxiliary heat exchanger.

[0021] In some optional embodiments, the liquid storage device further includes: a first valve, disposed on the first refrigerant pipeline.

[0022] According to a second embodiment provided by the present application, an air conditioner is provided, comprising: a heat exchange system as described in any one of the above items.

[0023] The heat exchange system and air conditioner provided by the embodiments of the present disclosure can achieve the following technical effects:

[0024] In this embodiment, the first end of the liquid storage device is connected to the return air end of the compressor, and the second end of the liquid storage device is connected to the refrigerant pipeline between the indoor throttling device and the outdoor throttling device, so that the refrigerant between the indoor throttling device and the outdoor throttling device can enter the liquid storage device through the second end of the liquid storage device to store the refrigerant in the liquid storage device, thereby reducing the amount of refrigerant participating in the heat exchange cycle. The refrigerant in the liquid storage device can also flow into the return air end of the compressor through the first end of the liquid storage device to reduce the refrigerant stored in the liquid storage device and increase the amount of refrigerant participating in the heat exchange cycle. In this embodiment, the amount of refrigerant participating in the heat exchange cycle can be adjusted by the liquid storage device to improve the rationality of the amount of refrigerant participating in the heat exchange cycle under different working conditions of the heat exchange system and improve the energy efficiency of the heat exchange system. In addition, in this embodiment, the two ends of the auxiliary heat exchanger are respectively connected to the indoor throttling device and the outdoor throttling device, so that the heat exchange of the auxiliary heat exchanger can be adjusted by adjusting the working throttling or fully open non-throttling state of the indoor throttling device and the outdoor throttling device. The refrigerant in the first end of the liquid storage device can exchange heat with the auxiliary heat exchanger. In this way, the refrigerant flowing into the compressor from the first end of the liquid storage device can exchange heat with the auxiliary heat exchanger to adjust the temperature of the refrigerant flowing into the compressor, thereby improving the compression rate of the refrigerant discharged from the compressor and the working efficiency of the compressor, and further improving the energy efficiency of the heat exchange system.

[0025] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0027] Figure 1 is a structural schematic diagram of a heat exchange system provided by an embodiment of the present disclosure;

[0028] Figure 2 is a structural schematic diagram of another heat exchange system provided by an embodiment of the present disclosure;

[0029] Figure 3 is a schematic diagram of a connection structure of an auxiliary heat exchanger, a second refrigerant pipeline, and a third refrigerant pipeline provided in an embodiment of the present disclosure;

[0030] Figure 4 It is a schematic diagram of the connection structure of another auxiliary heat exchanger, the second refrigerant pipeline and the third refrigerant pipeline provided in an embodiment of the present disclosure.

[0031] Reference numerals:

[0032] 100, heat exchange circuit; 110, compressor; 120, indoor heat exchanger; 130, indoor throttling device; 140, outdoor throttling device; 150, outdoor heat exchanger; 200, auxiliary heat exchanger; 300, liquid storage device; 310, liquid storage tank; 320, first refrigerant pipeline; 321, first valve; 330, second refrigerant pipeline; 331, first sub-refrigerant pipeline; 332, second sub-refrigerant pipeline; 333, second valve; 334, third valve; 340, third refrigerant pipeline; 341, fourth valve. DETAILED DESCRIPTION

[0033] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0034] The terms "first", "second", etc. in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0035] In the embodiments of the present disclosure, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the embodiments of the present disclosure and their embodiments, and are not intended to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction. Moreover, in addition to being used to indicate directions or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0036] In addition, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0037] The term "and / or" is a description of the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.

[0038] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

[0039] The present disclosure provides a heat exchange system, such as Figures 1 to 4 As shown, the heat exchange system includes a heat exchange circuit 100, an auxiliary heat exchanger 200 and a liquid storage device 300. The heat exchange circuit 100 includes a compressor 110, an indoor heat exchanger 120, an indoor throttling device 130, an outdoor throttling device 140 and an outdoor heat exchanger 150 which are sequentially connected through a refrigerant pipeline. The two ends of the auxiliary heat exchanger 200 are respectively connected to the indoor throttling device 130 and the outdoor throttling device 140. The first end of the liquid storage device 300 is connected to the return air end of the compressor 110, and the second end of the liquid storage device 300 is connected to the refrigerant pipeline between the indoor throttling device 130 and the outdoor throttling device 140, wherein the refrigerant in the first end of the liquid storage device 300 can exchange heat with the auxiliary heat exchanger 200.

[0040] The liquid storage device 300 is used to store refrigerant, and the refrigerant in the refrigerant pipeline between the indoor throttling device 130 and the outdoor throttling device 140 can flow into the liquid storage device 300 through the second end of the liquid storage device 300, and the refrigerant in the liquid storage device 300 can flow into the compressor 110 through the first end of the liquid storage device 300 and the return air end of the compressor 110.

[0041] In this embodiment, the first end of the liquid storage device 300 is connected to the return air end of the compressor 110, and the second end of the liquid storage device 300 is connected to the refrigerant pipeline between the indoor throttling device 130 and the outdoor throttling device 140, so that the refrigerant between the indoor throttling device 130 and the outdoor throttling device 140 can enter the liquid storage device 300 through the second end of the liquid storage device 300, so as to store the refrigerant in the liquid storage device 300 and reduce the amount of refrigerant participating in the heat exchange cycle. The refrigerant in the liquid storage device 300 can also flow into the return air end of the compressor 110 through the first end of the liquid storage device 300 to reduce the refrigerant stored in the liquid storage device 300 and increase the amount of refrigerant participating in the heat exchange cycle. In this embodiment, the amount of refrigerant participating in the heat exchange cycle can be adjusted through the liquid storage device 300 to improve the rationality of the amount of refrigerant participating in the heat exchange cycle under different working conditions of the heat exchange system and improve the energy efficiency of the heat exchange system. In addition, in this embodiment, the two ends of the auxiliary heat exchanger 200 are connected to the indoor throttling device 130 and the outdoor throttling device 140 respectively, so that the heat exchange amount of the auxiliary heat exchanger 200 can be adjusted by adjusting the working throttling or fully open non-throttling state of the indoor throttling device 130 and the outdoor throttling device 140. The refrigerant in the first end of the liquid storage device 300 can exchange heat with the auxiliary heat exchanger 200, so that the refrigerant flowing into the compressor 110 from the first end of the liquid storage device 300 can exchange heat with the auxiliary heat exchanger 200 to adjust the temperature of the refrigerant flowing into the compressor 110, thereby improving the compression rate of the refrigerant discharged from the compressor 110 and the working efficiency of the compressor 110, and further improving the energy efficiency of the heat exchange system.

[0042] For example, when the heat exchange system is in cooling operation, the refrigerant is discharged from the exhaust end of the compressor 110 to the outdoor heat exchanger 150, and the refrigerant condenses and releases heat in the outdoor heat exchanger 150 and then flows into the outdoor throttling device 140. At this time, the outdoor throttling device 140 is in a fully open non-throttling state, and the refrigerant flows into the auxiliary heat exchanger 200 after passing through the outdoor throttling device 140, and the refrigerant can continue to condense and release heat in the auxiliary heat exchanger 200, so that the auxiliary heat exchanger 200 can heat.

[0043] After the refrigerant flows out of the auxiliary heat exchanger 200, if the liquid storage device 300 stores the refrigerant, a portion of the refrigerant flows into the liquid storage device 300 through the second end of the liquid storage device 300, and the other portion of the refrigerant continues to flow along the refrigerant pipeline to the indoor throttling device 130. If the liquid storage device 300 does not store the refrigerant, all of the refrigerant continues to flow along the refrigerant pipeline to the indoor throttling device 130.

[0044] At this time, the indoor throttling device 130 is in the working throttling state. The refrigerant flows into the indoor heat exchanger 120 after being throttled by the indoor throttling device 130. The refrigerant evaporates and absorbs heat in the indoor heat exchanger 120 to perform refrigeration. After flowing out of the indoor heat exchanger 120, the refrigerant flows back to the compressor 110 through the return air end of the compressor 110 to perform the next refrigeration cycle.

[0045] When the liquid storage device 300 releases the refrigerant, the refrigerant in the liquid storage device 300 flows from the first end of the liquid storage device 300 into the return air end of the compressor 110. In the process of the refrigerant flowing through the first end of the liquid storage device 300, the refrigerant can exchange heat with the auxiliary heat exchanger 200 to increase the temperature of the refrigerant flowing into the return air end of the compressor 110.

[0046] Optionally, when the heat exchange system is in heating operation, the refrigerant is discharged from the exhaust end of the compressor 110 into the indoor heat exchanger 120, and the refrigerant condenses and releases heat in the indoor heat exchanger 120 to perform heating. After the refrigerant flows out of the indoor heat exchanger 120, it flows into the indoor throttling device 130. At this time, the indoor throttling device 130 is in a fully open non-throttling state, and the refrigerant flows into the auxiliary heat exchanger 200 after passing through the indoor throttling device 130, and the refrigerant can continue to condense and release heat in the auxiliary heat exchanger 200, so that the auxiliary heat exchanger 200 can perform heating.

[0047] After the refrigerant flows out of the auxiliary heat exchanger 200, if the liquid storage device 300 stores the refrigerant, a portion of the refrigerant flows into the liquid storage device 300 through the second end of the liquid storage device 300, and the other portion of the refrigerant continues to flow along the refrigerant pipeline to the outdoor throttling device 140. If the liquid storage device 300 does not store the refrigerant, all of the refrigerant continues to flow along the refrigerant pipeline to the outdoor throttling device 140.

[0048] At this time, the outdoor throttling device 140 is in the working throttling state. The refrigerant flows into the outdoor heat exchanger 150 after being throttled by the outdoor throttling device 140. After evaporating and absorbing heat in the outdoor heat exchanger 150, the refrigerant flows back to the compressor 110 through the return air end of the compressor 110 to perform the next heating cycle.

[0049] When the liquid storage device 300 releases the refrigerant, the refrigerant in the liquid storage device 300 flows from the first end of the liquid storage device 300 into the return air end of the compressor 110. In the process of the refrigerant flowing through the first end of the liquid storage device 300, the refrigerant can exchange heat with the auxiliary heat exchanger 200 to increase the temperature of the refrigerant flowing into the return air end of the compressor 110.

[0050] In some optional embodiments, such as Figure 1 and Figure 2 As shown, the liquid storage device 300 includes a liquid storage tank 310, a first refrigerant pipeline 320, and a second refrigerant pipeline 330. The first end of the first refrigerant pipeline 320 is connected to the refrigerant pipeline between the indoor throttling device 130 and the outdoor throttling device 140, and the second end of the first refrigerant pipeline 320 is connected to the liquid storage tank 310. The first end of the second refrigerant pipeline 330 is connected to the return air end of the compressor 110, and the second end of the second refrigerant pipeline 330 is connected to the liquid storage tank 310.

[0051] The second refrigerant pipeline 330 cooperates with the auxiliary heat exchanger 200 to adjust the temperature of the refrigerant flowing into the return air end of the compressor 110 in the second refrigerant pipeline 330 .

[0052] In this optional embodiment, the first end of the first refrigerant pipeline 320 is connected to the refrigerant pipeline between the indoor throttling device 130 and the outdoor throttling device 140, and the second end of the first refrigerant pipeline 320 is connected to the liquid storage tank 310. In this way, the refrigerant in the refrigerant pipeline between the indoor throttling device 130 and the outdoor throttling device 140 can flow into the liquid storage device 300 through the first refrigerant pipeline 320.

[0053] The first end of the second refrigerant pipeline 330 is connected to the return air end of the compressor 110, and the second end of the second refrigerant pipeline 330 is connected to the liquid storage tank 310, so that the refrigerant in the liquid storage tank 310 can flow into the return air end of the compressor 110 through the second refrigerant pipeline 330, and then flow into the compressor 110, reducing the refrigerant stored in the liquid storage tank 310. In addition, the second refrigerant pipeline 330 cooperates with the auxiliary heat exchanger 200, so that the temperature of the refrigerant in the second refrigerant pipeline 330 can be increased through the auxiliary heat exchanger 200. For example, when the heat exchange system is in low-temperature heating, the refrigerant flowing into the compressor 110 can be increased through the auxiliary heat exchanger 200 to supplement the compressor 110 and increase the working efficiency of the compressor 110.

[0054] Alternatively, if Figure 3 and Figure 4 As shown, the second refrigerant pipeline 330 is in contact with the auxiliary heat exchanger 200 , so that the heat of the auxiliary heat exchanger 200 can be transferred to the second refrigerant pipeline 330 .

[0055] Furthermore, the second refrigerant pipeline 330 is disposed around the outside of the auxiliary heat exchanger 200.

[0056] Optionally, there is a gap between the second refrigerant pipeline 330 and the auxiliary heat exchanger 200 , and the length of the gap is smaller than the radiation length of the heat of the auxiliary heat exchanger 200 .

[0057] In this embodiment, the specific coordination between the second refrigerant pipeline 330 and the auxiliary heat exchanger 200 is not specifically limited as long as it can achieve heat exchange between the second refrigerant pipeline 330 and the auxiliary heat exchanger 200.

[0058] Optionally, the auxiliary heat exchanger 200 comprises a plate heat exchanger.

[0059] Optionally, the liquid storage device 300 further includes a first valve 321 , which is disposed in the first refrigerant pipeline 320 , and is used to adjust the refrigerant flow in the first refrigerant pipeline 320 .

[0060] In this embodiment, the first valve 321 is disposed on the first refrigerant pipeline 320. When the liquid storage tank 310 needs to store liquid, the first valve 321 can be opened to allow the refrigerant in the heat exchange circuit 100 to flow into the liquid storage device 300, thereby reducing the refrigerant participating in the heat exchange cycle.

[0061] Exemplarily, the liquid storage device 300 further includes a second valve 333 , and the second valve 333 is disposed on the second refrigerant pipeline 330 .

[0062] In this embodiment, the second valve 333 is arranged on the second refrigerant pipeline 330. When the liquid storage tank 310 needs to be drained, the second valve 333 can be opened to allow the refrigerant in the liquid storage tank 310 to flow into the compressor 110 through the second refrigerant pipeline 330 under the action of the suction force of the return air end of the compressor 110, thereby increasing the refrigerant participating in the heat exchange cycle.

[0063] like Figure 1 As shown, in a specific embodiment, the second refrigerant pipeline 330 includes a first sub-refrigerant pipeline 331 and a second sub-refrigerant pipeline 332, the first end of the first sub-refrigerant pipeline 331 is connected to the return air end of the compressor 110, and the second end of the first sub-refrigerant pipeline 331 is connected to the lower end of the liquid storage tank 310. The second valve 333 is provided on the first sub-refrigerant pipeline 331, and the first sub-refrigerant pipeline 331 cooperates with the auxiliary heat exchanger 200.

[0064] The first end of the second sub-refrigerant pipeline 332 is connected to the first sub-refrigerant pipeline 331, and the second end of the second sub-refrigerant pipeline 332 is connected to the upper end of the liquid storage tank 310. The connection position of the second sub-refrigerant pipeline 332 and the first sub-refrigerant pipeline 331 is located upstream of the matching position of the first sub-refrigerant pipeline 331 and the auxiliary heat exchanger 200.

[0065] In this embodiment, the two ends of the first sub-refrigerant pipeline 331 are respectively connected between the return air end of the compressor 110 and the lower end of the liquid storage tank 310. The upper end of the liquid storage tank 310 stores a gaseous refrigerant, and the lower end of the liquid storage tank 310 stores a liquid refrigerant. In this way, the liquid refrigerant in the liquid storage tank 310 can flow out of the liquid storage tank 310 through the first sub-refrigerant pipeline 331. In this way, when the refrigerant in the liquid storage tank 310 is reduced, the discharged refrigerant is a liquid refrigerant, so as to improve the efficiency of the refrigerant discharged from the liquid storage tank 310, reduce the time required to increase the refrigerant participating in the heat exchange cycle, and improve the heat exchange effect of the heat exchange system.

[0066] Optionally, the first valve 321 includes a first throttling device. When the liquid storage tank 310 is discharged, that is, when the refrigerant participating in the heat exchange cycle is increased, the first throttling device operates to throttle, and the second valve 333 is fully opened. In this way, the refrigerant flowing into the liquid storage tank 310 through the first refrigerant pipeline 320 is a gaseous refrigerant, and the refrigerant flowing out of the liquid storage tank 310 is a gaseous refrigerant, so as to improve the heat release efficiency of the liquid storage tank 310.

[0067] In this embodiment, the first end of the second sub-refrigerant pipeline 332 is connected to the first sub-refrigerant pipeline 331, and the second end of the second sub-refrigerant pipeline 332 is connected to the upper end of the liquid storage tank 310. In this way, the gaseous refrigerant at the upper end of the liquid storage tank 310 can also be discharged through the second sub-refrigerant pipeline 332 to reduce the storage amount of the gaseous refrigerant in the liquid storage tank 310, increase the storage amount of the liquid refrigerant, and thus improve the liquid storage effect of the liquid storage tank 310.

[0068] Furthermore, the liquid storage device 300 further includes a third valve 334 , which is disposed on the second refrigerant sub-pipeline 332 to adjust the refrigerant flow rate of the second refrigerant sub-pipeline 332 .

[0069] For example, when increasing the liquid storage volume of the liquid storage tank 310, the third valve 334 is opened and the first valve 321 is opened, so that the gaseous refrigerant in the liquid storage tank 310 can flow from the second sub-refrigerant pipeline 332 into the first sub-refrigerant pipeline 331, and then flow into the compressor 110, so as to reduce the pressure in the liquid storage tank 310, increase the refrigerant volume and refrigerant speed of the liquid refrigerant flowing in from the first refrigerant pipeline 320, and improve the liquid storage effect of the liquid storage tank 310.

[0070] In this embodiment, the connection position of the second sub-refrigerant pipeline 332 and the first sub-refrigerant pipeline 331 is located upstream of the matching position of the first sub-refrigerant pipeline 331 and the auxiliary heat exchanger 200. In this way, the refrigerant flowing from the second sub-refrigerant pipeline 332 into the first sub-refrigerant pipeline 331 can also pass through the auxiliary heat exchanger 200 and perform heat exchange with the auxiliary heat exchanger 200.

[0071] Optionally, the second valve 333 includes a second throttling device, so that the amount of refrigerant flowing out of the liquid storage tank 310 can be adjusted by adjusting the size of the second throttling device. In addition, when the second throttling device is throttled, the liquid refrigerant can be throttled to a gaseous refrigerant to reduce the occurrence of liquid refrigerant entering the compressor 110, thereby improving the service life and working stability of the compressor 110.

[0072] Optionally, along the flow direction of the refrigerant in the first sub-refrigerant pipeline 331 , the connection position between the second sub-refrigerant pipeline and the first sub-refrigerant pipeline 331 , the second valve 333 and the auxiliary heat exchanger 200 are sequentially arranged.

[0073] like Figure 2 As shown, in another specific embodiment, the second end of the second refrigerant pipeline 330 is connected to the lower end of the liquid storage tank 310, and the liquid storage device 300 also includes a third refrigerant pipeline 340, the first end of the third refrigerant pipeline 340 is connected to the return air end of the compressor 110, and the second end of the third refrigerant pipeline 340 is connected to the upper end of the liquid storage tank 310.

[0074] In this embodiment, the second end of the second refrigerant pipeline 330 is connected to the lower end of the liquid storage tank 310, and the liquid refrigerant in the liquid storage tank 310 can flow into the compressor 110 through the second refrigerant pipeline 330. The two ends of the third refrigerant pipeline 340 are respectively connected to the return air end of the compressor 110 and the upper end of the liquid storage tank 310, so that the gaseous refrigerant in the liquid storage tank 310 can flow into the compressor 110 through the third refrigerant pipeline 340. In this embodiment, the third refrigerant pipeline 340 is arranged in parallel with the second refrigerant pipeline 330.

[0075] Furthermore, the liquid storage device 300 further includes a fourth valve 341 , which is disposed on the third refrigerant pipeline 340 to adjust the refrigerant flow rate of the third refrigerant pipeline 340 .

[0076] Optionally, the third refrigerant pipeline 340 cooperates with the auxiliary heat exchanger 200 to adjust the temperature of the refrigerant at the return air end of the compressor 110 flowing into the third refrigerant pipeline 340. The third refrigerant pipeline 340 is arranged adjacent to the second refrigerant pipeline 330, or the third refrigerant pipeline 340 and the second refrigerant pipeline 330 are respectively arranged on opposite sides of the auxiliary heat exchanger 200.

[0077] In this embodiment, the third refrigerant pipeline 340 cooperates with the auxiliary heat exchanger 200 to adjust the temperature of the refrigerant flowing into the return air end of the compressor 110 in the third refrigerant pipeline 340. For example, when the heat exchange system is heating at a low temperature, the refrigerant flowing into the compressor 110 can be increased through the auxiliary heat exchanger 200 to supplement the compressor 110 and increase the working efficiency of the compressor 110.

[0078] The heat exchange system provided in the embodiments of the present disclosure can be used in temperature regulating devices such as air conditioners, refrigerators, wine cabinets, and water heaters.

[0079] An embodiment of the present disclosure provides an air conditioner, comprising any of the heat exchange systems described above.

[0080] The air conditioner provided in the embodiment of the present disclosure includes the heat exchange system described in any one of the above embodiments, and thus has all the beneficial effects of the heat exchange system described in any one of the above embodiments, which will not be described in detail here.

[0081] The above description and the accompanying drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Portions and features of some embodiments may be included in or replace portions and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A heat exchange system, characterized in that: include: A heat exchange circuit includes a compressor, an indoor heat exchanger, an indoor throttling device, an outdoor throttling device and an outdoor heat exchanger which are sequentially connected through a refrigerant pipeline; An auxiliary heat exchanger, both ends of which are respectively connected to the indoor throttling device and the outdoor throttling device; A liquid storage device has a first end connected to the return air end of the compressor and a second end connected to the refrigerant pipeline between the indoor throttling device and the outdoor throttling device, wherein the refrigerant in the first end of the liquid storage device can exchange heat with the auxiliary heat exchanger.

2. The heat exchange system according to claim 1, characterized in that: The liquid storage device includes: Fluid storage tank; a first refrigerant pipeline, a first end of which is connected to the refrigerant pipeline between the indoor throttling device and the outdoor throttling device, and a second end of which is connected to the liquid storage tank; A second refrigerant pipeline, a first end of which is connected to the return air end of the compressor, and a second end of which is connected to the liquid storage tank; The second refrigerant pipeline cooperates with the auxiliary heat exchanger to adjust the temperature of the refrigerant in the second refrigerant pipeline flowing into the return air end of the compressor.

3. The heat exchange system according to claim 2, characterized in that: The liquid storage device also includes: The second valve is arranged on the second refrigerant pipeline.

4. The heat exchange system according to claim 3, characterized in that: The second refrigerant pipeline includes: A first sub-refrigerant pipeline, a first end of which is connected to the return air end of the compressor, a second end of which is connected to the lower end of the liquid storage tank, a second valve is provided on the first sub-refrigerant pipeline, and the first sub-refrigerant pipeline cooperates with the auxiliary heat exchanger; The second sub-refrigerant pipeline has a first end connected to the first sub-refrigerant pipeline and a second end connected to the upper end of the liquid storage tank; wherein the connection position between the second sub-refrigerant pipeline and the first sub-refrigerant pipeline is located upstream of the matching position between the first sub-refrigerant pipeline and the auxiliary heat exchanger.

5. The heat exchange system according to claim 4, characterized in that: The liquid storage device also includes: The third valve is arranged on the second sub-refrigerant pipeline.

6. The heat exchange system according to claim 2, characterized in that: The second end of the second refrigerant pipeline is connected to the lower end of the liquid storage tank, and the liquid storage device also includes: The third refrigerant pipeline has a first end connected to the return air end of the compressor and a second end connected to the upper end of the liquid storage tank.

7. The heat exchange system according to claim 6, characterized in that: The liquid storage device also includes: The fourth valve is arranged on the third refrigerant pipeline.

8. The heat exchange system according to claim 6, characterized in that: The third refrigerant pipeline cooperates with the auxiliary heat exchanger to adjust the temperature of the refrigerant flowing into the return air end of the compressor in the third refrigerant pipeline. The third refrigerant pipeline is arranged adjacent to the second refrigerant pipeline, or the third refrigerant pipeline and the second refrigerant pipeline are respectively arranged on opposite sides of the auxiliary heat exchanger.

9. The heat exchange system according to any one of claims 2 to 8, characterized in that: The liquid storage device also includes: The first valve is arranged on the first refrigerant pipeline.

10. An air conditioner, characterized in that: include: A heat exchange system as claimed in any one of claims 1 to 9.

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