Outdoor heat exchanger structure and air conditioning system

Abstract

The present invention discloses an outdoor heat exchanger structure and air-conditioning system, comprising: an air collecting pipe assembly, wherein the air collecting pipe assembly is divided into a first air collecting pipe part, a second air collecting pipe part and a third air collecting pipe part by a first control valve and a second control valve; a first liquid collecting pipe assembly, wherein a part of the pipe on one side is connected to the other side of the first heat exchanger, and the other part of the pipe is connected to one side of the second heat exchanger; and a second liquid collecting pipe assembly, wherein one side is connected to the other side of the third heat exchanger. The present invention divides the air collecting pipe into three areas by controlling the valve component, and each area corresponds to an independent heat exchanger. The windward area of ​​the heat exchanger is positively correlated with the wind field effect. The two heat exchangers corresponding to the best wind field effect can form parallel and series flow paths through the valve assembly and be used as the condensing section; the heat exchanger corresponding to the worst wind field effect is used as the subcooling section. In the cooling mode, the flow path of the heat exchanger can be freely switched according to the operating load demand to increase the heat exchange efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to an outdoor heat exchanger structure and an air conditioning system. Background Art

[0002] When designing the flow path for an outdoor heat exchanger, the impact of uneven wind patterns must be considered. This is especially true in areas with weaker wind patterns. To balance outdoor evaporation efficiency in heating mode, the manifold design requires less smooth flow in areas with weaker wind patterns than in areas with stronger wind patterns. This, in cooling mode, can lead to accumulation of liquid refrigerant after condensation. Furthermore, the requirements for outdoor condensing area vary depending on the cooling load. Configuring a larger condensing area for a smaller cooling load can reduce heat exchange efficiency due to slower refrigerant flow. Summary of the Invention

[0003] In order to solve the technical problem in the prior art that the outdoor heat exchanger does not take into account the influence of the wind field on the heat exchange effect, the present invention proposes an outdoor heat exchanger structure and an air-conditioning system.

[0004] The technical solution adopted in the present invention is:

[0005] The present invention proposes an outdoor heat exchanger structure, comprising:

[0006] The gas collecting pipe assembly is divided into a first gas collecting pipe section, a second gas collecting pipe section and a third gas collecting pipe section by a first control valve and a second control valve;

[0007] a heat exchanger group comprising a first heat exchanger connected to the first collecting pipe section on one side, a second heat exchanger connected to the second collecting pipe section on one side, and a third heat exchanger connected to the third collecting pipe section on one side, wherein the windward areas of the three heat exchangers are positively correlated with their corresponding wind field effects;

[0008] a first manifold assembly, a portion of the pipe on one side of which is connected to the other side of the first heat exchanger, and another portion of the pipe is connected to the other side of the second heat exchanger;

[0009] One side of the second liquid collecting pipe assembly is connected to the other side of the third heat exchanger.

[0010] Furthermore, the other side of the first heat exchanger and the second heat exchanger branches into two paths, one path is connected to the first collecting pipe assembly, and the other path is connected to each other through pipes so that the first heat exchanger and the other side of the second heat exchanger are connected in series.

[0011] Furthermore, the multiple pipe interfaces on the other side of the first heat exchanger are divided into n groups in order from high to low according to the heat exchange effect, and the multiple pipe interfaces on the other side of the second heat exchanger are divided into n groups in order from low to high according to the heat exchange effect, and n is greater than 1. Each group of pipe interfaces of the first heat exchanger is connected to each group of pipe interfaces of the second heat exchanger in sequence through pipes.

[0012] Furthermore, the pipes connected in series on the other side of the first heat exchanger and the second heat exchanger are straight pipes.

[0013] The present invention also includes a first connecting pipe connected to the indoor heat exchanger side, the first connecting pipe is provided with a throttling component, and the first connecting pipe branches into two branch pipes, the two branch pipes are respectively connected to the other side of the first collecting pipe assembly and the second collecting pipe assembly.

[0014] The present invention also includes a third control valve and a fourth control valve, one end of the third control valve is connected to the other side of the first heat exchanger and the second heat exchanger through a pipeline, and the other end is connected to the gas collecting pipe assembly, and the connection point is located between the second control valve and the third gas collecting pipe part; the fourth control valve is arranged on a branch pipe connecting the first connecting pipe to the first liquid collecting pipe assembly.

[0015] Furthermore, the fourth control valve is a one-way valve or a switch valve, and the third control valve is a flow regulating valve or a switch valve.

[0016] The present invention also provides an air conditioning system, characterized in that it includes the above-mentioned outdoor heat exchanger structure.

[0017] The air conditioning system comprises a gas-liquid separator, a compressor and a four-way valve, and the gas collecting pipe assembly is connected to the four-way valve.

[0018] Specifically, when the air conditioning system operates in the cooling parallel mode, the four-way valve is switched to connect the exhaust side of the compressor to the gas collecting pipe assembly, and the first control valve and the third control valve are opened, and the second control valve and the fourth control valve are closed.

[0019] Specifically, when the air-conditioning system operates in refrigeration series mode, the four-way valve is switched to connect the exhaust side of the compressor to the gas collecting pipe assembly, the second control valve is opened, the first control valve and the fourth control valve are closed, and the third control valve is closed or the opening of the third control valve is adjusted according to the load demand.

[0020] Specifically, when the air conditioning system operates in heating mode, the four-way valve is switched to connect the gas collecting pipe assembly to the gas-liquid separator, the first control valve, the second control valve and the fourth control valve are opened, and the third control valve is closed.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] A multi-flow path outdoor heat exchanger structure is proposed. Control valves divide the manifold into three zones, each corresponding to an independent heat exchanger. The windward area of ​​the heat exchanger is positively correlated with the wind field effect. The two heat exchangers corresponding to the optimal wind field effect can be connected in parallel and series via valve components, serving as the condensing section. The heat exchanger corresponding to the worst wind field effect serves as the subcooling section. In cooling mode, the heat exchanger flow paths can be freely switched according to operating load demand, maximizing heat exchange efficiency.

[0023] In the condensing section, the outlets of both the first and second heat exchangers utilize a dual flow path design. One path is connected to a throttling component for uniform liquid evaporation during heating; the other uses a straight pipe section to connect the typical flow paths of the first and second heat exchangers in series, achieving a series connection of the two heat exchangers at partial load and a parallel connection at full load. The typical flow path refers to a portion of the flow path of the first heat exchanger connected in series with a portion of the flow path of the second heat exchanger, achieving equal heat exchange for each flow path exiting the second heat exchanger.

[0024] The two heat exchangers in the condensing section adopt a dual-flow design in which the heating flow passes through the throttling component and the cooling flow passes through the straight pipe section. This can not only achieve uniform liquid separation during heating and improve the evaporation effect of the heat exchanger in the heating flow path, but also avoid the pressure loss caused by the throttling component in the cooling flow path.

[0025] The outlet of the heat exchanger corresponding to the subcooling section adopts a throttling component connection method and is set in front of the cooling flow flow regulating valve. It can be used as an evaporator in the heating mode to improve the overall heating efficiency of the heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 Schematic diagram of the structure of an outdoor heat exchanger in an embodiment of the present invention;

[0028] Figure 2 Schematic diagram of parallel flow paths of an outdoor heat exchanger in cooling mode according to an embodiment of the present invention;

[0029] Figure 3 Schematic diagram of the series flow path of the outdoor heat exchanger in cooling mode according to an embodiment of the present invention;

[0030] Figure 4 Schematic diagram of a series flow path of an outdoor heat exchanger in cooling mode in another embodiment of the present invention;

[0031] Figure 5 Schematic diagram of parallel flow paths of an outdoor heat exchanger in heating mode according to an embodiment of the present invention;

[0032] Figure 6 Schematic diagram of the structure of an outdoor heat exchanger in another embodiment of the present invention.

[0033] 1. Gas-liquid separator; 2. Compressor; 3. Four-way valve; 4. Outdoor heat exchanger; 5. First connecting pipe; 6. Second connecting pipe;

[0034] 401, gas collecting pipe assembly; 4011, first control valve; 4012, second control valve;

[0035] 402, heat exchanger group; 4021, first heat exchanger; 4022, second heat exchanger; 4023, third heat exchanger;

[0036] 403, liquid collecting pipe assembly; 4031, first liquid collecting pipe assembly; 4032, second liquid collecting pipe assembly; 4033, first connecting pipe; 4034, second connecting pipe; 4035, third connecting pipe; 404, third control valve; 405, fourth control valve; 406, throttling component. DETAILED DESCRIPTION

[0037] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0038] The principle and structure of the present invention are described in detail below with reference to the accompanying drawings and embodiments.

[0039] When designing the flow path of an outdoor heat exchanger, the impact of uneven wind fields must be considered. In particular, in areas with weaker wind fields, to balance evaporation efficiency outdoors in heating mode, the manifold design requires less smooth flow in areas with weaker wind fields than in areas with stronger wind fields. This, in cooling mode, can lead to accumulation of liquid refrigerant after condensation. Furthermore, different cooling loads require varying amounts of outdoor condensing area. Configuring a larger condensing area for a smaller cooling load can reduce refrigerant flow and reduce heat exchange efficiency. To address this issue, the present invention proposes an outdoor heat exchanger structure that uses a control valve to divide the manifold into three zones, each corresponding to a separate heat exchanger. The heat exchanger's frontal area is positively correlated with the wind field's performance. The two heat exchangers corresponding to the best wind field performance can be connected in parallel or series via a valve assembly, functioning as the condensing stage. The heat exchanger corresponding to the worst wind field performance functions as the subcooling stage. In cooling mode, the heat exchanger's flow path can be freely switched based on the operating load, maximizing heat exchange efficiency.

[0040] like Figure 1 As shown, the present invention proposes an outdoor heat exchanger structure. The outdoor heat exchanger 4 of the present invention specifically includes: an air collecting pipe assembly 401, a heat exchanger group, a first liquid collecting pipe assembly and a second liquid collecting pipe assembly. The upper part of the air collecting pipe assembly 401 is connected to a four-way valve. By switching the cooling and heating modes of the four-way valve, the compressor or the gas-liquid separator of the air-conditioning system can be connected. The air collecting pipe assembly is divided into a first air collecting pipe part, a second air collecting pipe part and a third air collecting pipe part by a first control valve and a second control valve; the heat exchanger group specifically includes a first heat exchanger, a second heat exchanger and a third heat exchanger, and the windward area of ​​the three heat exchangers is positively correlated with the corresponding wind field effect. Specifically, the right side of the first heat exchanger (it should be noted that one side, one end, the other end, the other side, the exhaust side, the outlet side The right side of the second heat exchanger is connected to the second gas collecting pipe part, and the right side of the third heat exchanger is connected to the third gas collecting pipe part; a part of the capillary tube on the upper right side of the first liquid collecting pipe assembly is connected one by one with each pipe interface on the left side of the first heat exchanger, and another part of the capillary tube on the lower right side of the first liquid collecting pipe assembly is connected one by one with each pipe interface on the left side of the second heat exchanger; the capillary tube on the right side of the second liquid collecting pipe assembly is connected one by one with each pipe interface on the left side of the third heat exchanger.

[0041] In the outdoor heat exchanger structure of the present invention, the frontal areas of the three heat exchangers in heat exchanger group 402 (first heat exchanger 4021, second heat exchanger 4022, and third heat exchanger 4023) are positively correlated with their corresponding wind field performance. Specifically, areas with better wind field performance have larger frontal areas, while areas with poorer wind field performance have smaller frontal areas. For example, in a vertical heat exchanger with air outlet directly above the unit, the upper wind field performance is better than the lower wind field performance, and the corresponding frontal areas are: first heat exchanger 4021 > second heat exchanger 4022 > third heat exchanger 4023.

[0042] In a specific embodiment, each pipe interface on the left side of the first heat exchanger and the second heat exchanger branches into two paths, one path is connected to the first collecting pipe assembly, and the other path is connected to each other through pipes so that the other side of the first heat exchanger and the second heat exchanger are connected in series.

[0043] Specifically, the other path is connected to each other through a straight pipe so that the first heat exchanger and the other side of the second heat exchanger are connected in series.

[0044] like Figure 6As shown, in other embodiments, another path is connected to the second heat exchanger through a capillary tube. Specifically, the capillary tubes are divided into multiple groups, each group is connected to a liquid separator, and the liquid separator is then connected one by one to the pipe interface of the second heat exchanger, which can be coordinated with the throttling component on the first connecting pipe. When the air-conditioning unit switches between cooling and heating modes, it can be taken into account. The two sets of throttling components act on the heating mode and the cooling mode respectively, so they can be designed independently without affecting each other.

[0045] In a preferred embodiment, the multiple pipe interfaces on the left side of the first heat exchanger are connected in sequence into n groups according to the connection method with the smallest difference in heat exchange effect, and the multiple pipe interfaces on the left side of the second heat exchanger are divided into n groups in sequence from low to high heat exchange effect, and n is greater than 1. Each group of pipe interfaces of the first heat exchanger is connected to each group of pipe interfaces of the second heat exchanger in sequence through pipes in a one-to-one correspondence.

[0046] The first heat exchanger 4021 and the second heat exchanger 4022 are connected in series using a typical flow path. The typical flow path refers to the connection method in which the best flow path and the worst flow path in the first heat exchanger 4021 are combined (i.e., the connection method with the smallest difference in heat exchange effect), and then enter the worst flow path in the second heat exchanger 4022 in series. The second best flow path and the second worst flow path in the first heat exchanger 4021 are combined in series and enter the second worst flow path in the second heat exchanger 4022 in series, and so on. This achieves the effect of achieving a consistent outlet temperature of the different series flow paths after the refrigerant enters the second heat exchanger through the first heat exchanger flow path series.

[0047] Specifically, Figure 1 The figure shows the flow path distribution of a vertical heat exchanger. The second heat exchanger has three branches (i.e., three pipe connections), designated 1 through 3 from top to bottom; the first heat exchanger has 12 branches (i.e., 12 pipe connections), designated 1 through 12 from top to bottom. Lines 1 and 2 in the first heat exchanger merge with lines 11 and 12 (i.e., a group of pipe connections) through first connecting pipe 4033 and enter line 3 (i.e., a group of pipe connections) in the second heat exchanger. Lines 3 and 4 in the first heat exchanger merge with lines 9 and 10 through second connecting pipe 4034 and enter line 2 of the second heat exchanger. Lines 5 and 6 in the first heat exchanger merge with lines 7 and 8 through third connecting pipe 4035 and enter line 1 of the second heat exchanger. The branch arrangement is not limited to the one described here; the specific configuration is designed to ensure that the temperatures of the branches in the series flow paths are consistent after heat exchange through the second heat exchanger.

[0048] In a preferred embodiment, the pipes connecting each group of pipe interfaces of the first heat exchanger and each group of pipe interfaces of the second heat exchanger in sequence through one-to-one correspondence are straight pipes.

[0049] In a preferred embodiment, the first gas header portion is connected to one end of the first heat exchanger 4021 via a straight pipe, and the first heat exchanger 4021 is connected to the first liquid header assembly 4031 via a capillary tube;

[0050] The second gas collecting pipe portion is connected to one end of the second heat exchanger 4022 via a straight pipe, and the other end of the second heat exchanger 4022 is connected to the second liquid collecting pipe assembly 4032 via a capillary tube;

[0051] The third gas collecting pipe portion is connected to one end of the third heat exchanger 4023 through a straight pipe, and the other end of the third heat exchanger 4023 is connected to the third liquid collecting pipe assembly through a capillary tube.

[0052] The connecting pipes between the gas collecting pipe assembly 401 and the heat exchanger group 402 are connected by straight pipes and have no throttling and pressure reduction effect. In the heat exchanger group 402, the connecting pipes between the first heat exchanger, the second heat exchanger, the third heat exchanger and the collecting pipe assembly 403 (the first collecting pipe assembly 4031, the second collecting pipe assembly 4032 and the third collecting pipe assembly) are connected by capillary tubes and have a throttling and pressure reduction effect.

[0053] A first connecting pipe 5 is provided on the left side of the outdoor heat exchanger of the present invention for connecting to the indoor heat exchanger of the air conditioner. A throttling component 406 is provided on the first connecting pipe 5, and the first connecting pipe 5 branches into two branch pipes, which are respectively connected to the other side of the first collecting pipe assembly and the second collecting pipe assembly.

[0054] The outdoor heat exchanger structure of the present invention also includes a third control valve 404 and a fourth control valve 405. One end of the third control valve 404 is connected to the other side of the first heat exchanger 4021 and the second heat exchanger 4022 via a pipe, and the other end is connected to the gas manifold assembly 401, with the connection point located between the second control valve 4012 and the third gas manifold section. The fourth control valve 405 is disposed on a branch pipe connecting the main pipe to the first liquid manifold assembly. The outdoor heat exchanger structure of the present invention utilizes the third control valve 404, the fourth control valve 405, and the first control valve 4011 to achieve both series and parallel flow paths between the first heat exchanger 4021 and the second heat exchanger 4022.

[0055] In a specific embodiment, the fourth control valve can be a one-way valve or a switch valve. When it is set as a one-way valve, the flow direction is consistent with the direction of the heating flow path, that is, the refrigerant directly enters the first liquid collecting pipe assembly 4031 from the throttling component 406 (flow regulating valve), but cannot enter the throttling component 406 from the first liquid collecting pipe assembly 4031.

[0056] In a specific embodiment, the third control valve is a flow regulating valve or a switch valve.

[0057] If the third control valve is a valve with flow regulation function, there will be a second refrigeration series flow path, such as Figure 4 As shown. Figure 3 The difference is that the refrigerant after heat exchange in the first heat exchanger can directly enter the second heat exchanger in one way, and enter the third heat exchanger through the third control valve in the other way. The flow entering the third controller is controlled by the third control valve. In this way, the circulation rate of the refrigerant can be accelerated, which is suitable for different medium and low load requirements.

[0058] The present invention further provides an air conditioning system comprising the above-mentioned outdoor heat exchanger structure. Therefore, the air conditioning system of the present invention has all the beneficial effects that can be achieved by the above-mentioned outdoor heat exchanger structure.

[0059] In a specific embodiment, an air conditioning system includes a gas-liquid separator 1, a compressor 2, and a four-way valve 3. The upper end of an air manifold assembly 401 of an outdoor heat exchanger 4 is connected to the four-way valve 3. A second connecting pipe 6, connected to the four-way valve, is also provided for connection to the indoor heat exchanger. By switching the four-way valve, the exhaust side of the compressor is connected to the manifold assembly, or the manifold assembly is connected to the gas-liquid separator.

[0060] The refrigerant flow path of the cooling mode of the air conditioning system of the present invention is as follows:

[0061] When the air conditioner is judged to be in high load operation, a cooling parallel flow path is used, such as Figure 2 shown.

[0062] When the air conditioner is judged to be in medium or low load operation, the cooling series flow path is adopted, such as Figure 3 shown.

[0063] Optionally, when the air conditioner is operating at medium or low load, the second cooling series flow path can be used, such as Figure 4 shown.

[0064] When the air conditioning system operates in the cooling parallel mode, that is, the cooling parallel flow path, specifically, the first heat exchanger 4021 and the second heat exchanger 4022 form a parallel flow path, and the two heat exchanger manifolds are connected and merged through a straight pipe section, forming a series connection with the third heat exchanger 4023. Among them, the first heat exchanger 4021 and the second heat exchanger 4022 do not need to pass through the throttling component before entering the third heat exchanger 4023, reducing the pressure loss caused by the throttling component. Specific control valve components are as follows: Figure 2 As shown:

[0065] First control valve 4011 is open, second control valve 4012 is closed, third control valve 404 is open, and fourth control valve 405 is closed. High-temperature, high-pressure gaseous refrigerant flows through the gas header and simultaneously enters the first and second heat exchangers for heat exchange. After merging through the straight pipe section, it enters the third heat exchanger for further heat exchange and subcooling, achieving a greater degree of subcooling before entering the indoor space through the liquid-side pipeline.

[0066] When the air conditioning system operates in cooling series mode, that is, the cooling series flow path, specifically the first heat exchanger 4021, the second heat exchanger 4022 and the third heat exchanger 4023 are connected in series. Among them, the first heat exchanger 4021 does not need to pass through the throttling component before entering the second heat exchanger 4022, reducing the pressure loss caused by the throttling component. Specific control valve components such as Figure 3 As shown:

[0067] First control valve 4011 is closed, second control valve 4012 is open, third control valve 404 is closed, and fourth control valve 405 is closed. High-temperature, high-pressure gaseous refrigerant flows through the gas header and sequentially enters the first heat exchanger, the second heat exchanger, and the third heat exchanger, creating a greater degree of subcooling before entering the indoor space through the liquid-side pipeline.

[0068] If the third control valve 404 is a valve with a flow regulating function, then there is a second refrigeration series flow path, such as Figure 4 As shown. Figure 3 The difference is that the refrigerant after heat exchange in the first heat exchanger can directly enter the second heat exchanger in one way, and enter the third heat exchanger through the third control valve in the other way. The flow entering the third controller is controlled by the third control valve. In this way, the circulation rate of the refrigerant can be accelerated, which is suitable for different medium and low load requirements.

[0069] When the air conditioning system is running in heating mode, that is, in the heating flow path, all three heat exchangers participate in the evaporation of the refrigerant on the evaporation side, increasing the evaporation area. Figure 5 As shown:

[0070] First control valve 4011 is open, second control valve 4012 is open, third control valve 404 is closed, and fourth control valve 405 is open. During heating, the medium-pressure refrigerant passing through the indoor side is separated by the liquid-side throttling component and simultaneously enters the first, second, and third heat exchangers, where it evaporates. The evaporated gaseous refrigerant then returns to the suction side through the gas-side pipeline.

[0071] In cooling mode, the operating load is divided into three zones. When the load demand is highest, the upper two heat exchange zones switch to parallel flow paths. When the load demand is moderate, the upper two heat exchange zones switch to series flow paths, and the second heat exchanger and the third heat exchanger, which serves as the subcooling zone, switch to a dual flow path of parallel and series. When the load demand is lowest, all three heat exchangers switch to a pure series configuration. The heat exchanger is adaptable to different load demands. Regardless of the flow path, cooling is countercurrent heat exchange, with the refrigerant flow direction opposite to the outdoor wind direction, achieving full countercurrent heat exchange and improving heat exchange efficiency.

[0072] It should be noted that the terms used above are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0073] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to actual proportional relationships. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as being merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0074] In the description of this application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of this application; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0075] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0076] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0077] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. An outdoor heat exchanger structure, characterized in that: include: The gas collecting pipe assembly is divided into a first gas collecting pipe section, a second gas collecting pipe section and a third gas collecting pipe section by a first control valve and a second control valve; a heat exchanger group comprising a first heat exchanger connected to the first collecting pipe section on one side, a second heat exchanger connected to the second collecting pipe section on one side, and a third heat exchanger connected to the third collecting pipe section on one side, wherein the windward areas of the three heat exchangers are positively correlated with their corresponding wind field effects; a first manifold assembly, a portion of the pipe on one side of which is connected to the other side of the first heat exchanger, and another portion of the pipe is connected to the other side of the second heat exchanger; a second header assembly, one side of which is connected to the other side of the third heat exchanger; The two heat exchangers corresponding to the best wind field effect can form parallel and series flow paths through valve components and be used as condensing sections; the heat exchanger corresponding to the worst wind field effect can be used as a subcooling section. In the cooling mode, the flow path of the heat exchanger can be freely switched according to the operating load requirements.

2. The outdoor heat exchanger structure according to claim 1, characterized in that: The other side of the first heat exchanger and the second heat exchanger is branched into two paths, one path is connected to the first collecting pipe assembly, and the other path is interconnected through pipes to connect the first heat exchanger and the other side of the second heat exchanger.

3. The outdoor heat exchanger structure according to claim 2, characterized in that: The multiple pipe interfaces on the other side of the first heat exchanger are divided into n groups in descending order according to the heat exchange effect, and the multiple pipe interfaces on the other side of the second heat exchanger are divided into n groups in descending order according to the heat exchange effect, and n is greater than 1. Each group of pipe interfaces of the first heat exchanger is connected to each group of pipe interfaces of the second heat exchanger in sequence through pipes in a one-to-one correspondence.

4. The outdoor heat exchanger structure according to claim 2, characterized in that: The pipes connected in series on the other side of the first heat exchanger and the second heat exchanger are straight pipes.

5. The outdoor heat exchanger structure according to claim 1, characterized in that: It also includes a first connecting pipe connected to the indoor heat exchanger side, the first connecting pipe is provided with a throttling component, and the first connecting pipe branches into two branch pipes, the two branch pipes are respectively connected to the other side of the first collecting pipe assembly and the second collecting pipe assembly.

6. The outdoor heat exchanger structure according to claim 5, characterized in that: It also includes a third control valve and a fourth control valve, one end of the third control valve is connected to the other side of the first heat exchanger and the second heat exchanger through a pipeline, and the other end is connected to the gas collecting pipe assembly, and the connection point is located between the second control valve and the third gas collecting pipe part; the fourth control valve is arranged on a branch pipe connecting the first connecting pipe to the first liquid collecting pipe assembly.

7. The outdoor heat exchanger structure according to claim 6, characterized in that: The fourth control valve is a one-way valve or a switch valve, and the third control valve is a flow regulating valve or a switch valve.

8. Air conditioning system, characterized in that The outdoor heat exchanger structure comprises the outdoor heat exchanger structure according to any one of claims 1 to 7.

9. The air conditioning system according to claim 8, wherein: The air conditioning system includes a gas-liquid separator, a compressor and a four-way valve, and the gas collecting pipe assembly is connected to the four-way valve.

10. The air conditioning system according to claim 9, wherein: When the air conditioning system operates in a cooling parallel mode, the four-way valve is switched to connect the exhaust side of the compressor to the gas collecting pipe assembly, and the first control valve and the third control valve are opened, and the second control valve and the fourth control valve are closed.

11. The air conditioning system according to claim 9, wherein: When the air-conditioning system operates in refrigeration series mode, the four-way valve is switched to connect the exhaust side of the compressor to the gas collecting pipe assembly, the second control valve is opened, the first control valve and the fourth control valve are closed, and the third control valve is closed or the opening of the third control valve is adjusted according to the load demand.

12. The air conditioning system according to claim 9, wherein: When the air conditioning system operates in heating mode, the four-way valve is switched to connect the gas collecting pipe assembly to the gas-liquid separator, the first control valve, the second control valve and the fourth control valve are opened, and the third control valve is closed.

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