Heat exchange structure and air conditioner

Abstract

The utility model provides a heat exchange structure and an air conditioner. The heat exchange structure comprises a first heat exchanger and a second heat exchanger, a second heat exchanger; the pipeline structure is connected with the first heat exchanger and the second heat exchanger; and the control module is used for controlling the flow direction of fluid in the pipeline structure, so that the heat exchange structure has a refrigeration parallel connection mode, a refrigeration series connection mode, a heating mode, a heating defrosting mode and a defrosting mode. The heat exchange structure solves the technical problem that a heat exchanger structure with an alternate defrosting function in the prior art is poor in heat exchange effect.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, in particular to a heat exchange structure and an air conditioner. Background Art

[0002] In the prior art, there is already an outdoor heat exchanger structure with a heat exchanger defrosting function. The details are as follows:

[0003] 1) Solenoid valves are installed between some of the liquid and gas collecting pipes and the heat exchanger flow paths, and the heat exchange flow paths are connected in parallel or in series by switching the solenoid valves on and off. However, this approach fails to take into account the rotating defrosting of the outdoor heat exchanger in heating mode and fails to maximize the function of the heat exchanger in the series-parallel flow paths.

[0004] 2) Using a dual four-way valve and dual outdoor heat exchanger configuration, alternating defrosting of the dual outdoor heat exchangers is achieved by switching the flow paths between the four-way valve and the outdoor heat exchanger. However, this approach fails to account for the varying heat exchanger volumes required for different operating loads under cooling mode, fails to implement series-parallel flow paths for the heat exchangers, and fails to maximize cooling capacity under varying operating loads.

[0005] Therefore, the prior art needs to be further developed. Utility Model Content

[0006] The purpose of the present invention is to overcome the above technical deficiencies and provide a heat exchange structure and an air conditioner to solve the technical problem of poor heat exchange effect of the heat exchanger structure with a rotating defrosting function in the related art.

[0007] In order to achieve the above technical objectives, the present invention adopts the following technical solutions: a heat exchange structure is provided, comprising: a first heat exchanger; a second heat exchanger; a piping structure, the piping structure being connected to the first heat exchanger and the second heat exchanger; a control module, the control module being used to control the flow direction of the fluid in the piping structure, so that the heat exchange structure has a cooling parallel mode, a cooling series mode, a heating mode, a heating defrost mode, and a defrost mode; wherein, when the heat exchange structure is in the cooling parallel mode, the first heat exchanger and the second heat exchanger are used for cooling, and the first heat exchanger and the second heat exchanger are used for heating, A heat exchanger is connected in parallel with the second heat exchanger; when the heat exchange structure is in the cooling series mode, the first heat exchanger and the second heat exchanger are used for cooling, and the first heat exchanger and the second heat exchanger are connected in series; when the heat exchange structure is in the heating mode, the first heat exchanger and the second heat exchanger are used for heating; when the heat exchange structure is in the heating defrost mode, any one of the first heat exchanger and the second heat exchanger is used for heating, and the other of the first heat exchanger and the second heat exchanger is defrosted; when the heat exchange structure is in the defrost mode, both the first heat exchanger and the second heat exchanger are defrosted.

[0008] Furthermore, the pipeline structure includes: a gas pipe connecting pipe, which is used to introduce gas into the pipeline structure or lead out gas in the pipeline structure; and a liquid pipe connecting pipe, which is used to introduce liquid into the pipeline structure or lead out liquid in the pipeline structure.

[0009] Furthermore, the control module includes a control valve group, which includes at least one four-way valve. The control valve group is arranged in the pipeline structure to change the flow direction of the fluid in the pipeline structure through the control valve group.

[0010] Furthermore, the heat exchange structure also includes: a first connecting pipeline, one end of the first connecting pipeline is connected to the input end of the first heat exchanger, and the other end of the first connecting pipeline is connected to the control valve group; a second connecting pipeline, one end of the second connecting pipeline is connected to the output end of the first heat exchanger, and the other end of the second connecting pipeline is connected to the control valve group.

[0011] Furthermore, the heat exchange structure also includes: a third connecting pipeline, one end of the third connecting pipeline is connected to the input end of the second heat exchanger, and the other end of the third connecting pipeline is connected to the control valve group; a fourth connecting pipeline, one end of the fourth connecting pipeline is connected to the output end of the second heat exchanger, and the other end of the fourth connecting pipeline is connected to the control valve group.

[0012] Furthermore, the heat exchange structure also includes: a compressor; a fifth connecting pipeline, one end of the fifth connecting pipeline is connected to the air inlet of the compressor, and the other end of the fifth connecting pipeline is connected to the control valve group; a sixth connecting pipeline, one end of the sixth connecting pipeline is connected to the air outlet of the compressor, and the other end of the sixth connecting pipeline is connected to the control valve group.

[0013] Furthermore, the heat exchange structure also includes a gas-liquid separator, which is arranged on the fifth connecting pipeline.

[0014] Furthermore, the control valve group includes a first four-way valve, a second four-way valve and a third four-way valve; wherein, the D ends of the first four-way valve and the third four-way valve are respectively connected to the sixth connecting pipeline; the E ends of the first four-way valve and the second four-way valve are respectively connected to the fifth connecting pipeline; the D end of the second four-way valve is connected to the S end of the third four-way valve; the E end of the third four-way valve is connected to the liquid collecting end of the first heat exchanger; the C end of the third four-way valve is connected to the liquid pipe connecting pipe; the S end of the first four-way valve is connected to the gas pipe connecting pipe (8); the C end of the first four-way valve is connected to the gas collecting end of the first heat exchanger; the S end of the second four-way valve is connected to the gas collecting end of the second heat exchanger; and the C end of the second four-way valve is connected to the gas collecting end of the first heat exchanger.

[0015] Furthermore, the C end of the third four-way valve is connected to the liquid pipe connecting pipe through the first throttling component; the liquid collecting end of the second heat exchanger is connected to the liquid pipe connecting pipe through the second throttling component; the C end of the second four-way valve is connected to the gas collecting end of the first heat exchanger through the first control valve; and the C end of the first four-way valve is connected to the gas collecting end of the first heat exchanger through the second control valve.

[0016] An air conditioner comprises a heat exchange structure, wherein the heat exchange structure is the above-mentioned heat exchange structure.

[0017] Beneficial effects:

[0018] The heat exchange structure of this embodiment includes: a first heat exchanger; a second heat exchanger; a piping structure, the piping structure being connected to both the first heat exchanger and the second heat exchanger; a control module, the control module being used to control the flow direction of the fluid in the piping structure so that the heat exchange structure has a cooling parallel mode, a cooling series mode, a heating mode, a heating defrost mode and a defrost mode; wherein, when the heat exchange structure is in the cooling parallel mode, the first heat exchanger and the second heat exchanger are used for cooling, and the first heat exchanger is connected in parallel; when the heat exchange structure is in the cooling series mode, the first heat exchanger and the second heat exchanger are used for cooling, and the first heat exchanger is connected in series; when the heat exchange structure is in the heating mode, the first heat exchanger and the second heat exchanger are used for heating; when the heat exchange structure is in the heating defrost mode, any one of the first heat exchanger and the second heat exchanger is used for heating, and the other of the first heat exchanger and the second heat exchanger is defrosted; when the heat exchange structure is in the defrost mode, both the first heat exchanger and the second heat exchanger are defrosted. The heat exchange structure of the utility model adopts a variety of defrosting flow paths, which can be used as needed to ensure indoor comfort and solve the technical problem of poor heat exchange effect of the heat exchanger structure with a rotating defrosting function. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the heat exchange structure adopted in the embodiment of the present utility model;

[0020] Figure 2 This is a schematic structural diagram of the heat exchange structure used in the embodiment of the present utility model when it is in a cooling parallel mode;

[0021] Figure 3 This is a schematic structural diagram of the heat exchange structure used in the embodiment of the present utility model when it is in a refrigeration series mode;

[0022] Figure 4 This is a schematic structural diagram of the heat exchange structure used in the embodiment of the present utility model when it is in heating mode;

[0023] Figure 5 This is a schematic structural diagram of the heat exchange structure used in the embodiment of the present utility model when it is in heating mode;

[0024] Figure 6 This is a schematic structural diagram of the heat exchange structure used in the embodiment of the present utility model when it is in the heating and defrosting mode;

[0025] Figure 7 It is a structural schematic diagram of the heat exchange structure adopted in the embodiment of the present utility model when it is in the defrosting mode.

[0026] The above drawings include the following reference numerals:

[0027] 1. Gas-liquid separator; 2. Compressor; 301. First four-way valve; 302. Second four-way valve; 303. Third four-way valve; 401. First throttling component; 402. Second throttling component; 501. First heat exchanger; 502. Second heat exchanger; 601. First control valve; 602. Second control valve; 7. Liquid pipe connecting pipe; 8. Gas pipe connecting pipe. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0029] According to an embodiment of the present invention, a heat exchange structure is provided. Figures 1 to 7 , comprising: a first heat exchanger 501; a second heat exchanger 502; a piping structure, the piping structure being connected to both the first heat exchanger 501 and the second heat exchanger 502; a control module, the control module being used to control the flow direction of the fluid in the piping structure, so that the heat exchange structure has a cooling parallel mode, a cooling series mode, a heating mode, a heating defrost mode, and a defrost mode; wherein, when the heat exchange structure is in the cooling parallel mode, the first heat exchanger 501 and the second heat exchanger 502 are used for cooling, and the first heat exchanger 501 and the second heat exchanger 502 are connected in parallel; when the heat exchange structure is in the cooling series mode, the first heat exchanger 501 and the second heat exchanger 502 are used for cooling, and the first heat exchanger 501 and the second heat exchanger 502 are connected in parallel; In the connected mode, the first heat exchanger 501 and the second heat exchanger 502 are used for cooling, and the first heat exchanger 501 and the second heat exchanger 502 are connected in series; when the heat exchange structure is in the heating mode, the first heat exchanger 501 and the second heat exchanger 502 are used for heating; when the heat exchange structure is in the heating defrost mode, any one of the first heat exchanger 501 and the second heat exchanger 502 is used for heating, and the other one of the first heat exchanger 501 and the second heat exchanger 502 is defrosted; when the heat exchange structure is in the defrost mode, both the first heat exchanger 501 and the second heat exchanger 502 are defrosted.

[0030] Specifically, during conventional defrosting, the indoor unit is shut down, and the refrigerant flowing through the indoor side absorbs indoor heat, reducing comfort. The heat exchange structure of this embodiment allows for rotational defrosting of the heat exchangers during defrosting. When heating conditions are not severe, rotational defrosting of the outdoor heat exchanger is used. During this period, the indoor unit can maintain heating mode operation, resulting in a relatively high level of comfort. However, during heating operation under severe conditions, when the outdoor heat exchanger frosts rapidly and the degree of frost is high, rotational defrosting of the outdoor heat exchanger cannot ensure comfort. This is because, if rotational defrosting of the heat exchanger is used under severe conditions, the defrosting time is long, and when one heat exchanger is defrosted, the already defrosted heat exchanger will quickly frost, thus reducing unit performance. Therefore, a conventional defrost flow path is used under severe conditions. The heat exchange structure of this embodiment adopts multiple defrost flow paths, which can be used as needed to ensure indoor comfort and solve the technical problem of poor heat exchange performance in heat exchanger structures with rotational defrosting functions.

[0031] In the heat exchange structure of this embodiment, see Figure 1 The piping structure includes: a gas connection pipe 8 for introducing gas into the piping structure or draining gas from the piping structure; and a liquid connection pipe 7 for introducing liquid into the piping structure or draining liquid from the piping structure. In this way, the heat exchange structure achieves external cooling and heating effects by inputting and outputting refrigerants in different states, improving indoor temperature control comfort.

[0032] See also Figure 1 In this embodiment of the heat exchange structure, the control module includes a control valve assembly, which includes at least one four-way valve. The control valve assembly is disposed within the piping structure to change the flow direction of the fluid within the piping structure. Specifically, a four-way valve is a relatively common valve body and has a strong ability to switch piping paths, thereby facilitating the implementation of various piping connection methods.

[0033] In the heat exchange structure of this embodiment, see Figure 1 The heat exchange structure further includes: a first connecting pipeline, one end of which is connected to the input end of the first heat exchanger 501 and the other end of which is connected to the control valve group; and a second connecting pipeline, one end of which is connected to the output end of the first heat exchanger 501 and the other end of which is connected to the control valve group. Thus, by providing the first connecting pipeline and the second connecting pipeline, the first heat exchanger 501 is connected to the control valve group, thereby facilitating control of the input and output directions of the first heat exchanger 501.

[0034] In the heat exchange structure of this embodiment, see Figure 1The heat exchange structure further includes a third connecting pipe, one end of which is connected to the input end of the second heat exchanger 502 and the other end of which is connected to the control valve group; and a fourth connecting pipe, one end of which is connected to the output end of the second heat exchanger 502 and the other end of which is connected to the control valve group. Thus, by providing the third and fourth connecting pipes, the second heat exchanger 502 is connected to the control valve group, thereby facilitating control of the input and output directions of the second heat exchanger 502.

[0035] See also Figure 1 In this embodiment, the heat exchange structure further includes: a compressor 2; a fifth connecting pipeline, one end of which is connected to the air inlet of compressor 2 and the other end of which is connected to the control valve group; and a sixth connecting pipeline, one end of which is connected to the air outlet of compressor 2 and the other end of which is connected to the control valve group. Thus, by providing the sixth connecting pipeline, the high-pressure fluid output by compressor 2 is passed through different pipelines, thereby achieving different functions.

[0036] See also Figure 1 In the heat exchange structure of this embodiment, the heat exchange structure further includes a gas-liquid separator 1, which is arranged on the fifth connecting pipeline. The gas-liquid separator 1 is provided to discharge liquid from the fluid, which can improve the working efficiency of the compressor.

[0037] In the heat exchange structure of this embodiment, see Figure 1 The control valve group includes a first four-way valve 301, a second four-way valve 302 and a third four-way valve 303; wherein, the D ends of the first four-way valve 301 and the third four-way valve 303 are respectively connected to the sixth connecting pipeline; the E ends of the first four-way valve 301 and the second four-way valve 302 are respectively connected to the fifth connecting pipeline; the D end of the second four-way valve 302 is connected to the S end of the third four-way valve 303; the E end of the third four-way valve 303 is connected to the liquid collecting end of the first heat exchanger 501; the C end of the third four-way valve 303 is connected to the liquid pipe connecting pipe 7; the S end of the first four-way valve 301 is connected to the gas pipe connecting pipe 8; the C end of the first four-way valve 301 is connected to the gas collecting end of the first heat exchanger 501; the S end of the second four-way valve 302 is connected to the gas collecting end of the second heat exchanger 502; and the C end of the second four-way valve 302 is connected to the gas collecting end of the first heat exchanger 501. By setting up three four-way valves, while meeting the various cooling and heating needs of the heat exchange structure, the two flow paths can be switched in the cooling mode, and the heating mode can meet the defrosting work of a single or all heat exchangers, meeting the needs of efficient cooling and heating under different operating loads.

[0038] In the heat exchange structure of this embodiment, see Figure 1The C-end of the third four-way valve 303 is connected to the liquid pipe connecting pipe 7 via the first throttle component 401; the liquid collecting end of the second heat exchanger 502 is connected to the liquid pipe connecting pipe 7 via the second throttle component 402; the C-end of the second four-way valve 302 is connected to the gas collecting end of the first heat exchanger 501 via the first control valve 601; and the C-end of the first four-way valve 301 is connected to the gas collecting end of the first heat exchanger 501 via the second control valve 602. This arrangement allows for control of the flow rate and on / off switching within the pipeline, thereby adjusting the operating conditions of various functions and improving the operating efficiency of the heat exchange structure.

[0039] The air conditioner of this embodiment includes a heat exchange structure, which is the heat exchange structure described above. Using this heat exchange structure in this embodiment allows the outdoor heat exchangers to be connected in series or parallel in cooling mode, suitable for flow switching in multiple load scenarios, achieving more efficient cooling. In heating mode, the outdoor heat exchangers operate in parallel to ensure sufficient evaporation and avoid or reduce frost. In defrost mode, the heat exchangers can be defrosted in rotation while the indoor units continue to heat, improving indoor comfort.

[0040] The heat exchange structure of this embodiment is as follows:

[0041] See also Figure 1 The outdoor heat exchanger adopts a two-stage design, which is divided into the outdoor first heat exchanger 501 and the outdoor second heat exchanger 502; the first throttling component 401 serves as the refrigerant flow control component of the outdoor first heat exchanger 501, and is connected to the outdoor first heat exchanger 501 through the third four-way valve 303, which can control the flow and also control the on-off to realize the switching of the refrigeration series and parallel flow paths. The second throttling component 402 serves as the refrigerant flow control component of the outdoor second heat exchanger 502, and is directly connected to the outdoor second heat exchanger 502. Based on the outdoor second heat exchanger, the parallel and series flow paths of the outdoor first heat exchanger and the outdoor second heat exchanger are realized in the cooling mode through the switching of valve components; in the heating mode, the two rotate to defrost. The system is equipped with three four-way valves, and the multi-flow path function is realized through the four-way valve and double-layer outdoor heat exchanger design. The specific structure is shown below:

[0042] The gas-liquid separator 1 is connected to the suction side of the compressor 2. The discharge side of the compressor 2 is divided into two paths, connected to the D ends of the first four-way valve 301 and the third four-way valve 303, respectively. The E ends of the first four-way valve 301 and the second four-way valve 302 are connected to the inlet of the gas-liquid separator 1. The D end of the second four-way valve 302 is connected to the S end of the third four-way valve 303. The E end of the third four-way valve 303 is connected to the liquid collecting end of the outdoor first heat exchanger 501, and the C end is connected to the liquid pipe connecting pipe 7 through the first throttle component 401. The S end of the first four-way valve 301 is connected to the gas collecting end of the outdoor first heat exchanger 501, and the C end is connected to the gas collecting end of the outdoor first heat exchanger 501 through the second control valve 602. The S end of the second four-way valve 302 is connected to the gas collecting end of the outdoor second heat exchanger 502, and the C end is connected to the gas collecting end of the outdoor first heat exchanger 501 through the first control valve 601.

[0043] The specific advantages are:

[0044] In cooling mode, two flow paths can be switched to meet the needs of efficient cooling under different operating loads.

[0045] Figure 2 The figure shows the parallel flow path for the outdoor heat exchanger in cooling mode. In this flow path, the first four-way valve coil is de-energized, leaving both the DC and ES terminals connected. The second and third four-way valve coils are both energized, leaving both the DS and CE terminals connected. The second control valve 602 is open, while the first control valve 601 is closed. The first throttle component 401 is open, while the second throttle component 402 is open. The gaseous refrigerant returning from the indoor unit passes through gas connecting pipe 8 and returns to gas-liquid separator 1 for gas-liquid separation. After this, the gaseous refrigerant enters compressor 2 for compression. The high-temperature, high-pressure refrigerant is split into two paths. One path passes through the DC port of the first four-way valve 301, through the second control valve 602, and enters the outdoor first heat exchanger 501 for condensation. The condensed refrigerant then passes through the first throttle component 401 and enters the CE port of the third four-way valve 303, returning to the liquid connecting pipe 7. The other path passes through the DS port of the third four-way valve 303 and the DS port of the second four-way valve 302, entering the outdoor second heat exchanger 502 for condensation. The condensed refrigerant then passes through the second throttle component 402 and returns to the liquid connecting pipe 7. Both refrigerant paths merge at liquid connecting pipe 7 and enter the indoor space.

[0046] Figure 3The figure shows the series flow path of the outdoor heat exchanger in cooling mode. In this flow path, the coils of the first and third four-way valves are de-energized, connecting the DC and ES terminals. The coil of the second four-way valve 302 is energized, connecting the DS and CE terminals. The second control valve 602 is open, and the first control valve 601 is closed. The first throttle component 401 is closed, and the second throttle component 402 is open. The gaseous refrigerant returning from the indoor unit passes through the gas connecting pipe 8 and returns to the gas-liquid separator 1 for gas-liquid separation. The gaseous refrigerant then enters compressor 2 for compression. The high-temperature, high-pressure refrigerant passes through the DC terminal of the first four-way valve 301 and the second control valve 602, entering the outdoor first heat exchanger 501 for primary condensation. The condensed refrigerant then enters the SE terminal of the third four-way valve 303 and then passes through the DS terminal of the second four-way valve 302 to enter the outdoor second heat exchanger 502 for secondary condensation. The condensed refrigerant returns to the liquid connecting pipe 7 through the second throttle component 402, and then enters the indoor cooling system.

[0047] like Figure 4 The figure shows the heating mode flow path. In this flow path, the coils of the first and third four-way valves are energized, connecting the DS and CE terminals. The coil of the second four-way valve 302 is de-energized, connecting the DC and SE terminals. The second control valve 602 is open, and the first control valve 601 is closed. The first throttle component 401 is open, and the second throttle component 402 is open. Liquid refrigerant returning from the indoor unit is split into two paths through the liquid pipe connection 7. One path passes through the first throttle component 401, enters the CE terminal of the third four-way valve 303, and then returns to the outdoor first heat exchanger 501 for evaporation. The evaporated low-pressure gaseous refrigerant passes through the second control valve 602, enters the CE terminal of the first four-way valve 301, and then returns to the inlet pipe of the gas-liquid separator 1. The other path passes through the second throttle component 402, enters the outdoor second heat exchanger 502 for evaporation, and then enters the SE terminal of the second four-way valve 302, returning to the inlet pipe of the gas-liquid separator 1. The two refrigerants merge at the inlet of the gas-liquid separator 1, enter the compressor through the gas-liquid separator 1, and the high-pressure refrigerant compressed by the compressor 2 enters the gas pipe connecting pipe 8 through the first four-way valve 301DS end, and then enters the indoor side to achieve heating.

[0048] Figure 5The figure shows a continuous heating and defrosting flow path for the outdoor second heat exchanger 502. In this flow path, the first, second, and third four-way valve coils are energized, connecting the DS and CE terminals. The second control valve 602 is open, and the first control valve 601 is closed. The first throttle component 401 is open, and the second throttle component 402 is open. The high-pressure, high-temperature refrigerant compressed by compressor 2 is split into two paths. One path passes through the DS terminal of the first four-way valve 301, enters the gas pipe connecting pipe 8, and enters the indoor side for heating, achieving continuous heating in the indoor unit during defrosting. The other path passes through the DS terminal of the third four-way valve 303 and the DS terminal of the second four-way valve 302, and enters the outdoor second heat exchanger 502 for defrosting. The liquid refrigerant after condensation on the indoor side and the outdoor second heat exchanger 502 converges at the liquid pipe connecting pipe 7, enters the third four-way valve 303CE end through the first throttling component 401, and enters the outdoor first heat exchanger 501 for evaporation. The evaporated low-pressure and low-temperature refrigerant enters the first four-way valve 301CE end through the second control valve 602 and returns to the gas-liquid separator 1. The separated gaseous refrigerant enters the compressor for compression, and the cycle continues.

[0049] Figure 6 The figure shows a continuous heating and defrosting flow path for the outdoor first heat exchanger 501. In this flow path, the coils of the first and third four-way valves are energized, connecting the DS and CE terminals. The coil of the second four-way valve 302 is de-energized, connecting the DC and SE terminals. The second control valve 602 is closed, and the first control valve 601 is open. The first throttle component 401 is open, and the second throttle component 402 is open. The high-pressure, high-temperature refrigerant compressed by compressor 2 is split into two paths. One path passes through the DS terminal of the first four-way valve 301 and enters the gas connecting pipe 8, where it enters the indoor unit for heating, achieving continuous heating in the defrosted state. The other path passes through the DS terminal of the third four-way valve 303, the DC terminal of the second four-way valve 302, and the first control valve 601, entering the outdoor first heat exchanger 501 for defrosting. The defrosted liquid refrigerant then passes through the CE terminal of the third four-way valve 303 and the first throttle component 401 to enter the liquid connecting pipe 7, where it merges with the liquid refrigerant from the indoor unit. The merged refrigerant enters the outdoor second heat exchanger 502 through the second throttling component 402 for evaporation. The evaporated refrigerant enters the second four-way valve 302SE end and returns to the gas-liquid separator 1. The separated gaseous refrigerant enters the compressor for compression, and the cycle continues.

[0050] See also Figure 7 , which is the conventional defrosting flow path. This flow path is consistent with the parallel flow path of the refrigeration heat exchanger in Figure 1, and will not be repeated here.

[0051] The system's flow path design enables series-parallel flow switching for cooling heat exchangers, as well as rotational or overall defrosting of heating heat exchangers. This allows for operation in multiple scenarios, improving cooling or heating capabilities.

[0052] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in a sequence other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0053] Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments, and this embodiment will not be described in detail here.

[0054] The serial numbers of the above embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0055] In the above embodiments of the present application, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0056] The above is only a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A heat exchange structure, characterized in that: include: a first heat exchanger (501); a second heat exchanger (502); a piping structure connected to both the first heat exchanger (501) and the second heat exchanger (502); a control module, the control module being configured to control the flow direction of the fluid in the pipeline structure so that the heat exchange structure has a cooling parallel mode, a cooling series mode, a heating mode, a heating and defrosting mode, and a defrosting mode; Wherein, when the heat exchange structure is in a cooling parallel mode, the first heat exchanger (501) and the second heat exchanger (502) are used for cooling, and the first heat exchanger (501) and the second heat exchanger (502) are connected in parallel; when the heat exchange structure is in a cooling series mode, the first heat exchanger (501) and the second heat exchanger (502) are used for cooling, and the first heat exchanger (501) and the second heat exchanger (502) are connected in series; when the heat exchange structure is in a heating mode, the first heat exchanger (501) and the second heat exchanger (502) are used for heating; when the heat exchange structure is in a heating defrosting mode, any one of the first heat exchanger (501) and the second heat exchanger (502) is used for heating, and the other of the first heat exchanger (501) and the second heat exchanger (502) is defrosted; when the heat exchange structure is in a defrosting mode, both the first heat exchanger (501) and the second heat exchanger (502) are defrosted.

2. The heat exchange structure according to claim 1, characterized in that: The pipeline structure includes: a gas pipe connecting pipe (8) for introducing gas into the pipeline structure or leading gas out of the pipeline structure; The liquid pipe connecting pipe (7) is used for introducing liquid into the pipe structure or leading the liquid out of the pipe structure.

3. The heat exchange structure according to claim 1, characterized in that: The control module includes a control valve group, which includes at least one four-way valve. The control valve group is arranged in the pipeline structure to change the flow direction of the fluid in the pipeline structure through the control valve group.

4. The heat exchange structure according to claim 3, characterized in that: The heat exchange structure further includes: a first connecting pipeline, one end of which is connected to the input end of the first heat exchanger (501), and the other end of which is connected to the control valve group; A second connecting pipeline, one end of which is connected to the output end of the first heat exchanger (501), and the other end of which is connected to the control valve group.

5. The heat exchange structure according to claim 3, characterized in that: The heat exchange structure further includes: a third connecting pipeline, one end of the third connecting pipeline being connected to the input end of the second heat exchanger (502), and the other end of the third connecting pipeline being connected to the control valve group; A fourth connecting pipeline, one end of which is connected to the output end of the second heat exchanger (502), and the other end of which is connected to the control valve group.

6. The heat exchange structure according to claim 5, characterized in that: The heat exchange structure further includes: compressor (2); a fifth connecting pipeline, one end of the fifth connecting pipeline being connected to the air inlet of the compressor (2), and the other end of the fifth connecting pipeline being connected to the control valve group; A sixth connecting pipeline, one end of which is connected to the air outlet of the compressor (2), and the other end of which is connected to the control valve group.

7. The heat exchange structure according to claim 6, characterized in that: The heat exchange structure further comprises a gas-liquid separator (1), and the gas-liquid separator (1) is arranged on the fifth connecting pipeline.

8. The heat exchange structure according to claim 7, characterized in that: The control valve group includes a first four-way valve (301), a second four-way valve (302) and a third four-way valve (303); wherein, The D ends of the first four-way valve (301) and the third four-way valve (303) are respectively connected to the sixth connecting pipeline; the E ends of the first four-way valve (301) and the second four-way valve (302) are respectively connected to the fifth connecting pipeline; the D end of the second four-way valve (302) is connected to the S end of the third four-way valve (303); the E end of the third four-way valve (303) is connected to the liquid collecting end of the first heat exchanger (501); The C end of the three-way valve (303) is connected to the liquid pipe connecting pipe (7); the S end of the first four-way valve (301) is connected to the gas pipe connecting pipe (8); the C end of the first four-way valve (301) is connected to the gas collecting end of the first heat exchanger (501); the S end of the second four-way valve (302) is connected to the gas collecting end of the second heat exchanger (502); and the C end of the second four-way valve (302) is connected to the gas collecting end of the first heat exchanger (501).

9. The heat exchange structure according to claim 8, characterized in that: The C end of the third four-way valve (303) is connected to the liquid pipe connecting pipe (7) through the first throttling component (401); The liquid collecting end of the second heat exchanger (502) is connected to the liquid pipe connecting pipe (7) via a second throttling component (402); The C end of the second four-way valve (302) is connected to the gas collecting end of the first heat exchanger (501) through the first control valve (601); The C end of the first four-way valve (301) is connected to the gas collecting end of the first heat exchanger (501) through a second control valve (602).

10. An air conditioner comprising a heat exchange structure, characterized in that: The heat exchange structure is the heat exchange structure according to any one of claims 1 to 9.

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