Condenser piping structure and air conditioning system

Abstract

This invention discloses a condenser piping structure and an air conditioning system, comprising: a condenser including multiple sets of parallel-flowing heat exchange zones, each set of heat exchange zones including multiple heat exchange units; and a pipe valve assembly, corresponding to each set of heat exchange zones, used to switch the series and parallel connection status of each heat exchange unit in each set of heat exchange zones according to the discharge pressure of the air conditioning system compressor, thereby changing the number of parallel flow paths in the condenser. This invention changes the number of parallel flow paths in the condenser according to the air conditioning operating conditions to match different operating conditions of the air conditioner. This ensures that the heat exchange capacity does not decrease under high-temperature conditions of the air conditioning system, while preventing excessively high discharge pressure from triggering high-pressure protection and causing shutdown, thus avoiding impact on user experience.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, specifically to a condenser piping structure and an air conditioning system. Background Technology

[0002] Special purpose air conditioning systems typically operate over a wide temperature range. For small fixed-frequency air conditioners that use capillary throttling, the conventional methods used by variable frequency air conditioners, such as reducing the compressor frequency and increasing the opening of the electronic expansion valve, cannot be employed to achieve stable operation under high-temperature conditions. They generally have to rely on bypass circuits to handle the high pressure and high flow problems under high-temperature conditions, resulting in poor adaptability and stability. At the same time, a significant amount of cooling capacity will be lost under high-temperature conditions. Summary of the Invention

[0003] In order to solve the technical problem that the number of parallel flow rates of air conditioning heat exchangers in the prior art cannot be switched according to the actual operating conditions of the air conditioner, the present invention proposes a condenser piping structure and an air conditioning system.

[0004] The technical solution adopted in this invention is:

[0005] This invention proposes a condenser piping structure, comprising: a condenser, the condenser including multiple sets of parallel-flowing heat exchange zones, each set of heat exchange zones including multiple heat exchange units; and a pipe valve assembly, corresponding to each set of heat exchange zones, used to switch the series and parallel connection status of each heat exchange unit in each set of heat exchange zones according to the exhaust pressure of the air conditioning system compressor, thereby changing the number of parallel flow paths in the condenser.

[0006] When the compressor discharge pressure of the air conditioning system reaches the preset protection value, the pipe valve assembly of each heat exchange area is controlled to switch the heat exchange units of the corresponding heat exchange area into a series state.

[0007] When the compressor discharge pressure of the air conditioning system fails to reach the preset protection value, the pipe valve assemblies of each heat exchange area are controlled to switch each heat exchange unit of the corresponding heat exchange area to a parallel state.

[0008] The pipeline valve assembly includes: a series pipeline connecting two adjacent heat exchange units in each of the heat exchange areas, and a series valve installed on the series pipeline; one end of the series pipeline is connected to the outlet branch pipe of one heat exchange unit, and the outlet branch pipe of the heat exchange unit is provided with an outlet valve at the position between the connection point of the series pipeline and the main outlet pipe; the other end of the series pipeline is connected to the inlet branch pipe of another heat exchange unit, and the inlet branch pipe of the heat exchange unit is provided with an inlet valve at the position between the connection point of the series pipeline and the main inlet pipe.

[0009] The condenser is divided into a first heat exchange zone and a second heat exchange zone from top to bottom; the first heat exchange zone is further divided into a second heat exchange unit A2 and a first heat exchange unit A1; the second heat exchange zone is further divided into a fourth heat exchange unit A4 and a third heat exchange unit A3; the inlet branch pipes of the second heat exchange unit A2 and the fourth heat exchange unit A4 are equipped with inlet valves, and the outlet branch pipes of the third heat exchange unit A3 and the first heat exchange unit A1 are equipped with outlet valves; the outlet branch pipe of the first heat exchange unit A1 is connected to the inlet branch pipe of the second heat exchange unit A2, and the outlet branch pipe of the third heat exchange unit A3 is connected to the inlet branch pipe of the fourth heat exchange unit A4, all connected in series with the aforementioned valves.

[0010] Furthermore, the outlet side branch pipes of each heat exchange unit are connected to the outlet side main pipe of the condenser, and the inlet side branch pipes are connected to the inlet side main pipe of the condenser.

[0011] Preferably, the heat exchange zones of each group are arranged in a direction perpendicular to the air outlet direction of the condenser, and the heat exchange units are arranged in a direction parallel to the air outlet direction.

[0012] The present invention also proposes an air conditioning system including the above-described condenser piping structure.

[0013] The air conditioning system includes: a capillary tube connected to the outlet side main pipe of the condenser piping structure, an evaporator connected to the capillary tube, and a compressor connected to the evaporator, wherein the exhaust pipe of the compressor is connected to the inlet side main pipe of the condenser piping structure.

[0014] Furthermore, a high-pressure sensor is installed on the exhaust pipe of the compressor.

[0015] Compared with existing technologies, this invention changes the number of parallel flow paths in the condenser according to the air conditioner's operating conditions to match different operating conditions. This ensures that the heat exchange capacity does not decrease under high-temperature conditions of the air conditioning system, while preventing excessively high exhaust pressure from triggering high-pressure protection and causing shutdown, thus avoiding impacting the user experience. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the pipeline structure in an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the pipeline structure switched to parallel mode in an embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of the pipeline structure switched to series mode in an embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of the condenser in an embodiment of the present invention;

[0021] 1. Compressor;

[0022] 21. Import-side supervisor; 22. Export-side supervisor;

[0023] 3. Capillary tube;

[0024] 4. Evaporator;

[0025] 51. Series valves; 52. Outlet valves; 53. Inlet valves; 54. Series pipelines. Detailed Implementation

[0026] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0027] The principles and structure of the present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0028] Special-purpose air conditioning systems typically operate over a wide temperature range. For small, fixed-frequency air conditioners using capillary throttling, the conventional methods of reducing compressor frequency and increasing the electronic expansion valve opening used in variable-frequency air conditioners cannot achieve stable operation under high-temperature conditions. They generally rely on a bypass circuit (i.e., directly connecting a bypass circuit from the condenser outlet to the compressor intake pipe) to handle the high pressure and high flow rate issues under high-temperature conditions. This approach has poor adaptability and stability, and results in significant cooling capacity loss under high-temperature conditions. To address this, this invention designs an adjustable condenser piping structure for fixed-frequency air conditioners used in these special-purpose applications. This allows for the modification of the number of parallel flow paths in the condenser to match different operating conditions, ensuring that heat exchange capacity does not decrease under high-temperature conditions while preventing excessively high exhaust pressure from triggering high-pressure protection and causing shutdown, thus avoiding impact on user experience.

[0029] like Figure 1As shown, this invention proposes a condenser piping structure for an air conditioning system, specifically a fixed-frequency air conditioning system, comprising: a condenser and a piping and valve assembly. The condenser specifically includes an outlet-side main pipe 22 and an inlet-side main pipe 21. The outlet end of the outlet-side main pipe 22 is connected to the capillary tube 3 of the air conditioning system, and the inlet end of the inlet-side main pipe 21 is connected to the exhaust pipe of the compressor 1 of the air conditioning system. The condenser is divided into multiple parallel-flowing heat exchange zones, which are connected in parallel between the inlet-side main pipe 21 and the outlet-side main pipe 22. Each (or each group, meaning the same thing) heat exchange zone is further divided into multiple heat exchange units (A1 and A2 in the figure represent two heat exchange units in one heat exchange zone, and A3 and A4 represent two heat exchange units in another heat exchange zone). Each heat exchange unit is also connected in parallel... Between the inlet-side main pipe 21 and the outlet-side main pipe 22; pipe valve assemblies are set for each heat exchange area, used to switch the heat exchange units in the heat exchange area to a parallel or series state according to the discharge pressure of the compressor 1 (i.e., the actual operating condition of the air conditioning system). When switched to the parallel state, all heat exchange units are in parallel as a separate flow path. At this time, the number of flow paths increases but the heat exchange path is short, the heat exchange capacity increases and the discharge pressure also increases. When switched to the series state, each heat exchange area is in series, that is, each heat exchange area is a separate flow path. At this time, the number of flow paths is halved but the heat exchange path is long, the heat exchange capacity decreases but the discharge pressure also decreases. Thus, the discharge pressure can be changed by switching the number of flow paths to suit different operating conditions of the air conditioning system.

[0030] In a specific embodiment, when the exhaust pressure of the air conditioning system compressor 1 reaches the preset protection value, the pipe valve assembly of each heat exchange area is switched to switch each heat exchange unit of the heat exchange area to a series state, that is, each heat exchange area is a separate flow path. At this time, the number of flow paths is halved and the heat exchange path of the flow path is long, thereby reducing the exhaust pressure and making the exhaust pressure return to the preset protection value.

[0031] In a specific embodiment, when the exhaust pressure of the air conditioning system compressor 1 does not reach the preset protection value, the pipe valve assembly of each heat exchange area is switched to keep each heat exchange unit in the heat exchange area in parallel. All heat exchange units are in parallel as a separate flow path. At this time, the number of flow paths increases but the heat exchange path of the flow path is short, so as to improve the heat exchange capacity and ensure the operating efficiency of the air conditioning system.

[0032] In a specific embodiment, a series pipe 54 connects two adjacent heat exchange units in each heat exchange area, and a series valve 51 is installed on the series pipe 54. One end of the series pipe 54 is connected to the outlet branch pipe of one heat exchange unit, and the outlet branch pipe of the heat exchange unit is provided with an outlet valve 52 located between the connection point of the series pipe 54 and the outlet main pipe 22. The other end of the series pipe 54 is connected to the inlet branch pipe of another heat exchange unit, and the inlet branch pipe of the heat exchange unit is provided with an inlet valve 53 located between the connection point of the series pipe 54 and the inlet main pipe 21. When it is necessary to switch to the series state, the series valve 51 is opened, and the inlet valve 53 and the outlet valve 52 near the connection points of the two ends of the series pipe 54 are closed at the same time. This allows the refrigerant to flow into the inlet branch pipe of one heat exchange unit, and then flow through the series pipe 54 to the inlet branch pipe of the next heat exchange unit, and so on, until it flows through the last heat exchange unit and into the outlet main pipe 22.

[0033] The following are specific examples:

[0034] like Figure 1 , 2 As shown in Figure 3, the condenser is divided into a first heat exchange zone and a second heat exchange zone from top to bottom; the first heat exchange zone is divided into a second heat exchange unit A2 and a first heat exchange unit A1; the second heat exchange zone is divided into a fourth heat exchange unit A4 and a third heat exchange unit A3; the inlet branch pipes of the second heat exchange unit A2 and the fourth heat exchange unit A4 are equipped with inlet valves 53, and the outlet branch pipes of the third heat exchange unit A3 and the first heat exchange unit A1 are equipped with outlet valves 52. The outlet branch pipe of the first heat exchange unit A1 is connected to the inlet branch pipe of the second heat exchange unit A2, and the outlet branch pipe of the third heat exchange unit A3 is connected to the inlet branch pipe of the fourth heat exchange unit A4, all connected in series with valves 51.

[0035] like Figure 2 As shown, when it is necessary to switch to parallel mode, close the series valve 51 between the first heat exchange unit A1 and the second heat exchange unit A2, and at the same time open the outlet valve 52 of the outlet branch pipe of the first heat exchange unit A1 and the inlet valve 53 of the inlet branch pipe of the second heat exchange unit A2.

[0036] Close the series valve 51 between the third heat exchange unit A3 and the fourth heat exchange unit A4, and at the same time open the outlet valve 52 of the outlet branch pipe of the third heat exchange unit A3 and the inlet valve 53 of the inlet branch pipe of the fourth heat exchange unit A4, so that the refrigerant flows in from the inlet side branch pipe of the third heat exchange unit A3, then flows through the series pipe 54 to the inlet branch pipe of the fourth heat exchange unit A4, and then flows to the outlet side main pipe 22.

[0037] like Figure 3As shown, when it is necessary to switch to the series state, open the series valve 51 between the first heat exchange unit A1 and the second heat exchange unit A2, and at the same time close the outlet valve 52 of the outlet branch pipe of the first heat exchange unit A1 and the inlet valve 53 of the inlet branch pipe of the second heat exchange unit A2, so that the refrigerant flows in from the inlet side branch pipe of the first heat exchange unit A1, then flows through the series pipe 54 to the inlet branch pipe of the second heat exchange unit A2, and then flows to the outlet side main pipe 22;

[0038] Open the series valve 51 between the third heat exchange unit A3 and the fourth heat exchange unit A4, and at the same time close the outlet valve 52 of the outlet branch pipe of the third heat exchange unit A3 and the inlet valve 53 of the inlet branch pipe of the fourth heat exchange unit A4, so that the refrigerant flows in from the inlet side branch pipe of the third heat exchange unit A3, then flows through the series pipe 54 to the inlet branch pipe of the fourth heat exchange unit A4, and then flows to the outlet side main pipe 22.

[0039] The following are specific examples:

[0040] The condenser is divided into a first heat exchange zone and a second heat exchange zone from top to bottom; the first heat exchange zone is further divided into a second heat exchange unit A2, a first heat exchange unit A1, and a heat exchange unit A5; the second heat exchange zone is further divided into a fourth heat exchange unit A4, a third heat exchange unit A3, and a heat exchange unit A6; a series pipe 54 connects the first heat exchange unit A1 and the second heat exchange unit A2 in the first heat exchange zone, and a series pipe 54 also connects the second heat exchange unit A2 and the heat exchange unit A5. An outlet valve 52 is installed on the outlet branch pipe of the first heat exchange unit A1, and an inlet valve 52 is installed on the inlet branch pipe of the second heat exchange unit A2. The outlet branch pipe of the second heat exchange unit A2 is equipped with an outlet valve 52, and the inlet branch pipe of the heat exchange unit A5 is equipped with an inlet valve 53; the third heat exchange unit A3 and the fourth heat exchange unit A4 in the second heat exchange area are connected by a series pipe 54, and the fourth heat exchange unit A4 and the heat exchange unit A6 are connected by a series pipe 54. The outlet branch pipe of the third heat exchange unit A3 is equipped with an outlet valve 52, and the inlet branch pipe of the fourth heat exchange unit A4 is equipped with an inlet valve 53. The outlet branch pipe of the fourth heat exchange unit A4 is equipped with an outlet valve 52, and the inlet branch pipe of the heat exchange unit A6 is equipped with an inlet valve 53.

[0041] When switching to series mode, open the series valve 51 between the first heat exchange unit A1 and the second heat exchange unit A2 in the first heat exchange zone, open the series valve 51 between the second heat exchange unit A2 and the heat exchange unit A5, and at the same time close the outlet valve 52 of the outlet branch pipe of the first heat exchange unit A1, the inlet valve 53 of the inlet branch pipe of the second heat exchange unit A2, the outlet valve 52 of the outlet branch pipe of the second heat exchange unit A2, and the inlet valve 53 of the inlet branch pipe of the heat exchange unit A5. This allows the refrigerant to flow in from the inlet side branch pipe of the first heat exchange unit A1, then through the series pipe 54 to the inlet branch pipe of the second heat exchange unit A2, then through the series pipe 54 between the second heat exchange unit A2 and the heat exchange unit A5, to the heat exchange unit A5, and then through the valve outlet side main pipe 22.

[0042] Open the series valve 51 between the third heat exchange unit A3 and the fourth heat exchange unit A4 in the second heat exchange zone, and open the series valve 51 between the fourth heat exchange unit A4 and the heat exchange unit A6. Simultaneously close the outlet valve 52 of the outlet branch pipe of the third heat exchange unit A3, the inlet valve 53 of the inlet branch pipe of the fourth heat exchange unit A4, the outlet valve 52 of the outlet branch pipe of the fourth heat exchange unit A4, and the inlet valve 53 of the inlet branch pipe of the heat exchange unit A6. This allows the refrigerant to flow in from the inlet side branch pipe of the third heat exchange unit A3, then through the series pipe 54 to the inlet branch pipe of the fourth heat exchange unit A4, then through the series pipe 54 between the fourth heat exchange unit A4 and the heat exchange unit A6, and finally to the main pipe 22 on the valve outlet side. The number of heat exchange zones and the number of heat exchange units contained in each heat exchange zone can be adjusted according to the actual situation of the condenser.

[0043] Because the heat exchange units of a condenser are generally corresponding to the size or heat exchange capacity of the condenser, the fewer the heat exchange areas are divided, the greater the number of flow path changes when switching to a series state, and the greater the impact on the exhaust pressure.

[0044] like Figure 4 As shown in the specific embodiment, the airflow direction of the condenser is from left to right, and the condenser is divided into a first heat exchange area and a second heat exchange area from top to bottom; the first heat exchange area is equally divided into a second heat exchange unit A2 and a first heat exchange unit A1 from left to right; the second heat exchange area is equally divided into a fourth heat exchange unit A4 and a third heat exchange unit A3 from left to right. That is, the heat exchange areas are divided according to the airflow direction, so that the actual heat exchange capacity of each heat exchange area is approximately the same. At the same time, when connected in series, the refrigerant first passes through the heat exchange unit on the leeward side and then through the heat exchange unit on the windward side, which can further improve the heat exchange efficiency.

[0045] Under normal operating conditions, when two flow paths in the same group are switched to parallel operation, i.e., the inlet and outlet valves are open and the series valves are closed, the refrigerant flow direction is as follows: Figure 2As shown, A1 to A4 are four parallel flow paths. With this, the condenser has four flow paths. Simulations were conducted under the same refrigerant mass flow rate. Compared to the two-flow path, the heat exchange capacity of the four-flow path is increased by approximately 3%, but the exhaust pressure increases by approximately 0.14 MPa.

[0046] The four-flow path can increase the overall cooling capacity and improve energy efficiency under normal operating conditions.

[0047] Under high-temperature conditions, when the high-pressure sensor detects that the exhaust pressure has reached the preset protection value, the two flow paths in the same group switch to series connection, that is, the inlet valve and outlet valve are closed, and the series valve is opened. At this time, the refrigerant flow direction is as follows: Figure 3 As shown, A1 and A2 are connected in series to form one path, and A3 and A4 are connected in series to form another path. At this time, the number of flow paths in the condenser is two. Simulation results under the condition of the same refrigerant mass flow rate show that the heat exchange is increased by about 1% compared with the four-flow path, while the exhaust pressure is reduced by about 0.18 MPa.

[0048] The dual-flow path ensures that the heat exchange capacity does not decrease under high-temperature conditions, while preventing excessive exhaust pressure from triggering high-pressure protection and causing shutdown, thus avoiding impact on user experience.

[0049]

[0050] This invention also proposes an air conditioning system, specifically a fixed-frequency air conditioner for special purposes, including a condenser piping structure, which specifically includes:

[0051] The condenser and piping valve assembly includes a main outlet pipe and an inlet pipe. The outlet pipe connects to the capillary tube of the air conditioning system, and the inlet pipe connects to the exhaust pipe of the compressor. The condenser is divided into multiple parallel heat exchange zones connected between the inlet and outlet pipes. Each (or group of) heat exchange zone is further divided into multiple heat exchange units, each also connected in parallel between the inlet and outlet pipes. The piping valve assembly is configured for each heat exchange zone and is used to adjust the compressor's exhaust pressure (i.e., the air conditioning system's exhaust pressure). (During the actual operating conditions of the system) the heat exchange units in the heat exchange area are switched to either parallel or series connection. When switched to parallel connection, all heat exchange units are connected in parallel as individual flow paths. At this time, the number of flow paths increases, but the heat exchange path is short, resulting in increased heat exchange capacity and higher exhaust pressure. When switched to series connection, each heat exchange area is connected in series, meaning each heat exchange area is a separate flow path. At this time, the number of flow paths is halved, but the heat exchange path is long, resulting in decreased heat exchange capacity and lower exhaust pressure. Thus, the exhaust pressure can be changed by switching the number of flow paths to suit different operating conditions of the air conditioning system.

[0052] like Figure 1As shown, the air conditioning system includes: a condenser piping structure (including a condenser), a capillary tube 3 connected to the outlet side main pipe of the condenser piping structure, an evaporator 4 connected to the capillary tube 3, a compressor 1 connected to the evaporator 4, and the exhaust pipe of the compressor 1 connected to the inlet side main pipe 21 of the condenser piping structure.

[0053] Specifically, a high-pressure sensor is installed on the compressor's exhaust pipe to detect the high-pressure on the compressor's exhaust side in order to confirm the operating condition of the air conditioning system.

[0054] It should be noted that the terminology used above is for describing particular embodiments only and is not intended to limit the exemplary embodiments of the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form as well. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0055] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0056] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0057] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0058] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0059] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A condenser piping structure for a fixed-frequency air conditioning system, the fixed-frequency air conditioning system comprising a capillary tube, an evaporator, and a compressor, wherein the outlet-side main pipe of the condenser piping structure is connected to the capillary tube, the capillary tube is connected to the evaporator, the evaporator is connected to the compressor, the compressor's discharge pipe is connected to the inlet-side main pipe of the condenser piping structure, and the compressor's discharge pipe is provided with a high-pressure sensor for detecting the compressor's discharge pressure, characterized in that... include: The condenser includes multiple sets of parallel-flowing heat exchange zones, each set of heat exchange zones including multiple heat exchange units. The outlet-side branch pipes of each heat exchange unit are connected to the outlet-side main pipe of the condenser, and the inlet-side branch pipes are connected to the inlet-side main pipe of the condenser. The heat exchange zones are arranged perpendicular to the air outlet direction of the condenser, and the heat exchange units are arranged parallel to the air outlet direction. The condenser is divided into a first heat exchange zone and a second heat exchange zone. The first heat exchange zone is further divided into a second heat exchange unit and a first heat exchange unit. The second heat exchange zone is further divided into a fourth heat exchange unit and a third heat exchange unit. Pipeline valve assembly, set for each heat exchange area, is used to switch the series and parallel states of each heat exchange unit in each heat exchange area according to the exhaust pressure of the air conditioning system compressor, thereby changing the number of parallel flow paths of the condenser; When the air conditioning system compressor discharge pressure reaches the preset protection value, the pipe valve assembly of each group of heat exchange areas is controlled to switch the heat exchange units of the corresponding heat exchange area to a series state; when the air conditioning system compressor discharge pressure does not reach the preset protection value, the pipe valve assembly of each group of heat exchange areas is controlled to switch the heat exchange units of the corresponding heat exchange area to a parallel state. The pipeline valve assembly includes: a series pipeline connecting two adjacent heat exchange units in each of the heat exchange areas, and a series valve disposed on the series pipeline; one end of the series pipeline is connected to the outlet branch pipe of one heat exchange unit, and the outlet branch pipe of the heat exchange unit is provided with an outlet valve at the position between the connection point of the series pipeline and the main outlet pipe; the other end of the series pipeline is connected to the inlet branch pipe of another heat exchange unit, and the inlet branch pipe of the heat exchange unit is provided with an inlet valve at the position between the connection point of the series pipeline and the main inlet pipe; the inlet branch pipes of the second heat exchange unit and the fourth heat exchange unit are provided with inlet valves, and the outlet branch pipes of the third heat exchange unit and the first heat exchange unit are provided with outlet valves; the outlet branch pipe of the first heat exchange unit and the inlet branch pipe of the second heat exchange unit, as well as the outlet branch pipe of the third heat exchange unit and the inlet branch pipe of the fourth heat exchange unit, are all connected to the series valves; When the high-pressure sensor detects that the compressor discharge pressure has reached a preset protection value, the two flow paths in the same group switch to a series connection. The inlet valve and the outlet valve close, and the series valve opens. The first heat exchange unit and the second heat exchange unit are connected in series to form one path, and the third heat exchange unit and the fourth heat exchange unit are connected in series to form one path, so that the number of flow paths in the condenser is two. When the high-pressure sensor detects that the compressor discharge pressure has not reached the preset protection value, the two flow paths in the same group switch to a parallel connection. The inlet valve and the outlet valve open, and the series valve closes, so that the first heat exchange unit, the second heat exchange unit, the third heat exchange unit, and the fourth heat exchange unit are connected in parallel as four paths.

2. An air conditioning system, characterized in that, Includes the condenser piping structure as described in claim 1.

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