Air conditioning system and locomotive

Abstract

The invention provides an air conditioning system and a locomotive, the system comprises a compression assembly, an indoor heat exchanger, an indoor fan, an indoor reversing device, an outdoor heat exchanger, an outdoor fan and an outdoor reversing device, and the compression assembly communicates with the indoor heat exchanger and the outdoor heat exchanger through pipelines; the indoor fan is used for blowing air to the indoor heat exchanger; the indoor reversing device is used for controlling the flow direction of a refrigerant in the indoor heat exchanger to be opposite to the blowing direction of the indoor fan; the outdoor reversing device is used for controlling the flow direction of a refrigerant in the outdoor heat exchanger to be opposite to the air blowing direction of the outdoor fan. The working efficiency of the air conditioning system can be improved.

Description

Technical Field

[0001] This application relates to the technical field of air conditioners, and particularly to an air conditioning system and a locomotive. Background Art

[0002] An air conditioning system includes a compression assembly, an indoor heat exchanger, an outdoor heat exchanger, an indoor fan, an outdoor fan, etc. The air conditioning system can achieve refrigeration and heating by controlling the circulation of refrigerant among the compression assembly, the indoor heat exchanger, and the outdoor heat exchanger. The heat exchange efficiency of the indoor heat exchanger can be improved by blowing air to the indoor heat exchanger through the indoor fan, and the heat exchange efficiency of the outdoor heat exchanger can be improved by blowing air to the outdoor heat exchanger through the outdoor fan.

[0003] In the related art, when the air conditioning system is in the refrigeration and heating modes, the blowing directions of the indoor fan and the outdoor fan are fixed. In the refrigeration mode, the flow direction of the refrigerant in the indoor heat exchanger and the outdoor heat exchanger is opposite to that in the heating mode.

[0004] However, in the above method, when the air conditioning system is in the refrigeration and heating modes, only in one mode can the flow direction of the refrigerant in the heat exchanger be opposite to the blowing direction of the fan, while in the other mode, the flow direction of the refrigerant in the heat exchanger is the same as the blowing direction of the fan. When the flow direction of the refrigerant in the heat exchanger is the same as the blowing direction of the fan, the heat exchange efficiency of the heat exchanger is relatively low, resulting in a relatively low working efficiency of the air conditioning system. Summary of the Invention

[0005] Embodiments of this application provide an air conditioning system and a locomotive to solve the problem of relatively low working efficiency of the existing air conditioning system.

[0006] In a first aspect, embodiments of this application provide an air conditioning system, including: a compression assembly, an indoor heat exchanger, an indoor fan, an indoor reversing device, an outdoor heat exchanger, an outdoor fan, and an outdoor reversing device, where

[0007] The compression assembly is respectively connected to the indoor heat exchanger and the outdoor heat exchanger through pipelines;

[0008] The indoor fan is used to blow air directly at the indoor heat exchanger, and the indoor reversing device is used to control the flow direction of the refrigerant in the indoor heat exchanger to be opposite to the blowing direction of the indoor fan;

[0009] The outdoor fan is used to blow air directly at the outdoor heat exchanger, and the outdoor reversing device is used to control the flow direction of the refrigerant in the outdoor heat exchanger to be opposite to the blowing direction of the outdoor fan.

[0010] In a possible implementation, the indoor reversing device includes a first indoor switch, a second indoor switch, a third indoor switch, a fourth indoor switch, a first indoor reversing pipeline, and a second indoor reversing pipeline, where

[0011] The first indoor switch is arranged on the pipeline at one end of the indoor heat exchanger;

[0012] The second indoor switch is arranged on the pipeline at the other end of the indoor heat exchanger;

[0013] The third indoor switch is arranged on the first indoor reversing pipeline;

[0014] The fourth indoor switch is arranged on the second indoor reversing pipeline;

[0015] The first indoor reversing pipeline is respectively communicated with the pipelines at both ends of the indoor heat exchanger;

[0016] The second indoor reversing pipeline is respectively communicated with the pipelines at both ends of the indoor heat exchanger.

[0017] In a possible implementation manner, the system includes:

[0018] The first indoor reversing pipeline is communicated with the first indoor pipeline through a first indoor connection point on the first indoor pipeline, and the first indoor pipeline is the pipeline at one end of the indoor heat exchanger;

[0019] The first indoor reversing pipeline is communicated with the second indoor pipeline through a second indoor connection point on the second indoor pipeline, and the second indoor pipeline is the pipeline at the other end of the indoor heat exchanger;

[0020] The second indoor reversing pipeline is communicated with the first indoor pipeline through a third indoor connection point on the first indoor pipeline;

[0021] The second indoor reversing pipeline is communicated with the second indoor pipeline through a fourth indoor connection point on the second indoor pipeline.

[0022] In a possible implementation manner, the system includes:

[0023] The first indoor switch is arranged between the first indoor connection point and the third indoor connection point;

[0024] The second indoor switch is arranged between the second indoor connection point and the fourth indoor connection point.

[0025] In a possible implementation manner, at least one of the first indoor switch, the second indoor switch, the third indoor switch, and the fourth indoor switch is a one-way valve, wherein,

[0026] The conduction direction of the first indoor switch is from the first indoor connection point to the third indoor connection point; or,

[0027] The conduction direction of the second indoor switch is from the second indoor connection point to the fourth indoor connection point; or,

[0028] The conduction direction of the third indoor switch is from the connection point in the second chamber to the connection point in the first chamber; or,

[0029] The conduction direction of the fourth indoor switch is from the connection point in the fourth chamber to the connection point in the third chamber.

[0030] In a possible implementation, the outdoor commutation device includes a first outdoor switch, a second outdoor switch, a third outdoor switch, a fourth outdoor switch, a first outdoor commutation pipeline, and a second outdoor commutation pipeline, where,

[0031] The first outdoor switch is arranged on the pipeline at one end of the outdoor heat exchanger;

[0032] The second outdoor switch is arranged on the pipeline at the other end of the outdoor heat exchanger;

[0033] The third outdoor switch is arranged on the first outdoor commutation pipeline;

[0034] The fourth outdoor switch is arranged on the second outdoor commutation pipeline;

[0035] The first outdoor commutation pipeline is respectively communicated with the pipelines at both ends of the outdoor heat exchanger;

[0036] The second outdoor commutation pipeline is respectively communicated with the pipelines at both ends of the outdoor heat exchanger.

[0037] In a possible implementation, the system includes:

[0038] The first outdoor commutation pipeline is communicated with the first outdoor pipeline through the first outdoor connection point on the first outdoor pipeline, and the first outdoor pipeline is the pipeline at one end of the outdoor heat exchanger;

[0039] The first outdoor commutation pipeline is communicated with the second outdoor pipeline through the second outdoor connection point on the second outdoor pipeline, and the second outdoor pipeline is the pipeline at the other end of the outdoor heat exchanger;

[0040] The second outdoor commutation pipeline is communicated with the first outdoor pipeline through the third outdoor connection point on the first outdoor pipeline;

[0041] The second outdoor commutation pipeline is communicated with the second outdoor pipeline through the fourth outdoor connection point on the second outdoor pipeline.

[0042] In a possible implementation, the system includes:

[0043] The first outdoor switch is arranged between the first outdoor connection point and the third outdoor connection point;

[0044] The second outdoor switch is arranged between the second outdoor connection point and the fourth outdoor connection point.

[0045] In a possible implementation, at least one of the first outdoor switch, the second outdoor switch, the third outdoor switch, and the fourth outdoor switch is a one-way valve, where

[0046] the conduction direction of the first outdoor switch is from the first outdoor connection point to the third outdoor connection point; or,

[0047] the conduction direction of the second outdoor switch is from the second outdoor connection point to the fourth outdoor connection point; or,

[0048] the conduction direction of the third outdoor switch is from the second outdoor connection point to the first outdoor connection point; or,

[0049] the conduction direction of the fourth outdoor switch is from the fourth outdoor connection point to the third outdoor connection point.

[0050] In a possible implementation, the system further includes a controller, and at least one of the first indoor switch, the first outdoor switch, the second indoor switch, the second outdoor switch, the third indoor switch, the third outdoor switch, the fourth indoor switch, and the fourth outdoor switch is a solenoid valve, where

[0051] the controller is configured to control the on / off states of the solenoid valves among the first indoor switch, the first outdoor switch, the second indoor switch, the second outdoor switch, the third indoor switch, the third outdoor switch, the fourth indoor switch, and the fourth outdoor switch.

[0052] In a second aspect, an embodiment of the present application provides a locomotive, including the air conditioning system according to any one of the first aspect.

[0053] For the air conditioning system and the locomotive provided by the embodiments of the present application, the compression assembly is respectively communicated with the indoor heat exchanger and the outdoor heat exchanger through pipelines; the indoor fan is used to blow air directly at the indoor heat exchanger, and the indoor reversing device is used to control the flow direction of the refrigerant in the indoor heat exchanger to be opposite to the blowing direction of the indoor fan; the outdoor fan is used to blow air directly at the outdoor heat exchanger, and the outdoor reversing device is used to control the flow direction of the refrigerant in the outdoor heat exchanger to be opposite to the blowing direction of the outdoor fan. Through the indoor reversing device, the flow direction of the refrigerant in the indoor heat exchanger is opposite to the blowing direction of the indoor fan in both the cooling mode and the heating mode; through the outdoor reversing device, the flow direction of the refrigerant in the outdoor heat exchanger is opposite to the blowing direction of the outdoor fan in both the cooling mode and the heating mode, improving the heat exchange efficiency of the indoor heat exchanger and the outdoor heat exchanger, thereby enhancing the working efficiency of the air conditioning system. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] The accompanying drawings herein are incorporated into the specification and constitute a part of this specification, showing embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application.

[0055] Figure 1 Schematic diagram of the application scenario provided by the embodiment of the present application;

[0056] Figure 2 Schematic diagram of the structure of the air-conditioning system provided by the embodiment of the present application;

[0057] Figure 3 Schematic diagram of the structure of the indoor commutation device provided by the embodiment of the present application;

[0058] Figure 4 Schematic diagram of the structure of the outdoor commutation device provided by the embodiment of the present application;

[0059] Figure 5 Schematic diagram of the refrigerant flow direction of the air-conditioning system provided by the embodiment of the present application Figure 1 ;

[0060] Figure 6 Schematic diagram of the refrigerant flow direction of the air-conditioning system provided by the embodiment of the present application Figure 2 ;

[0061] Figure 7 Schematic diagram of the refrigerant flow direction of the air-conditioning system provided by the embodiment of the present application Figure 3 .

[0062] Through the above-mentioned drawings, the specific embodiments of the present application have been shown, and there will be more detailed descriptions hereinafter. These drawings and textual descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. Detailed implementation manners

[0063] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0064] It should be noted that in the embodiments of the present application, some industry-existing solutions such as certain software, components, models, etc. may be mentioned, and they should be considered exemplary. Their purpose is only to illustrate the feasibility in the implementation of the technical solution of the present application, but it does not mean that the applicant has already or necessarily used this solution.

[0065] Figure 1 Schematic diagram of the application scenario provided by the embodiment of the present application. Among them, Figure 1 (a) is the schematic diagram of the application scenario of the air-conditioning system, Figure 1 (b) is the schematic diagram of the refrigerant flow direction when the existing air-conditioning system is refrigerating,Figure 1 (c) is a schematic diagram of the refrigerant flow direction when the existing air-conditioning system is heating.

[0066] Refer to Figure 1 (a). The locomotive 100 includes an air-conditioning system 110, and the air-conditioning system 110 is used to adjust the temperature inside the locomotive 100.

[0067] Refer to Figure 1 (b) and Figure 1 (c). The air-conditioning system 110 may include an indoor fan 111, an indoor heat exchanger 112, an outdoor fan 113, an outdoor heat exchanger 114, a compression assembly 115, etc. The air-conditioning system 110 can achieve heat transfer and adjust the temperature inside the locomotive 100 by controlling the circulating flow of the refrigerant between the compression assembly 115, the indoor heat exchanger 112, and the outdoor heat exchanger 114.

[0068] As Figure 1 shown in (b), the direction indicated by the arrow in the figure is the refrigerant flow direction. When the air-conditioning system is in the cooling mode, the refrigerant flows from the compression assembly 115 to the outdoor heat exchanger 114, then to the indoor heat exchanger 112, and then back to the compression assembly 115 to achieve a refrigeration cycle; the indoor fan 111 blows air to the indoor heat exchanger 112 to improve the heat absorption and dissipation efficiency of the indoor heat exchanger 112; the outdoor fan 113 blows air to the outdoor heat exchanger 114 to improve the heat absorption and dissipation efficiency of the outdoor heat exchanger 114.

[0069] As Figure 1 shown in (c), the direction indicated by the arrow in the figure is the refrigerant flow direction. When the air-conditioning system is in the heating mode, the refrigerant flows from the compression assembly 115 to the indoor heat exchanger 112, then to the outdoor heat exchanger 114, and then back to the compression assembly 115 to achieve a heating cycle; the indoor fan 111 blows air to the indoor heat exchanger 112 to improve the heat absorption and dissipation efficiency of the indoor heat exchanger 112; the outdoor fan 113 blows air to the outdoor heat exchanger 114 to improve the heat absorption and dissipation efficiency of the outdoor heat exchanger 114.

[0070] When the flow direction of the refrigerant in the heat exchanger is opposite to the blowing direction of the fan, the heat exchange efficiency of the heat exchanger is higher.

[0071] In the related art, when the air-conditioning system is in the cooling mode and the heating mode, the flow direction of the refrigerant in the heat exchanger is opposite, while the blowing directions of the indoor fan and the outdoor fan are fixed, that is, when the air-conditioning system is cooling and heating, only in one mode the refrigerant flow direction is opposite to the blowing direction, and in the other mode the refrigerant flow direction is the same as the blowing direction. When the flow direction of the refrigerant in the heat exchanger is the same as the blowing direction of the fan, the heat exchange efficiency of the heat exchanger is lower, resulting in a lower working efficiency of the air-conditioning system.

[0072] In view of this, an embodiment of the present application provides an air conditioning system. By setting an outdoor reversing device, the flow direction of the refrigerant in the outdoor heat exchanger is opposite to the blowing direction of the outdoor fan in the cooling mode and the heating mode of the air conditioning system. By setting an indoor reversing device, the flow direction of the refrigerant in the indoor heat exchanger is opposite to the blowing direction of the outdoor fan in the cooling mode and the heating mode of the air conditioning system, improving the heat exchange efficiency of the indoor heat exchanger and the outdoor heat exchanger, and thus improving the working efficiency of the air conditioning system.

[0073] The following uses specific embodiments to detail the technical solution of the present application and how the technical solution of the present application solves the above technical problems. These several specific embodiments below can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below with reference to the drawings.

[0074] Figure 2 is a schematic structural diagram of the air conditioning system provided by the embodiment of the present application, as Figure 2 shown. The system includes: a compression assembly 210, an indoor heat exchanger 220, an indoor fan 230, an indoor reversing device 240, an outdoor heat exchanger 250, an outdoor fan 260, and an outdoor reversing device 270.

[0075] Among them, the compression assembly 210 is connected to the indoor heat exchanger 220 and the outdoor heat exchanger 250 respectively through pipelines; the indoor fan 230 is used to blow air directly at the indoor heat exchanger 220, and the indoor reversing device 240 is used to control the flow direction of the refrigerant in the indoor heat exchanger 220 to be opposite to the blowing direction of the indoor fan 230; the outdoor fan 260 is used to blow air directly at the outdoor heat exchanger 250, and the outdoor reversing device 270 is used to control the flow direction of the refrigerant in the outdoor heat exchanger 250 to be opposite to the blowing direction of the outdoor fan 260

[0076] The refrigerant is used to transfer heat to achieve cooling and heating effects. The refrigerant can transfer heat by changing its own state. For example, the refrigerant in a vapor state can release heat and condense into a liquid state; the refrigerant in a liquid state can absorb heat and evaporate into a vapor state.

[0077] The compression assembly 210 may include a compressor and a four-way valve. The compressor is used to compress the refrigerant in a low-temperature and low-pressure gas state into a high-temperature and high-pressure gas state to provide power for the refrigerant cycle. The four-way valve is used to control the flow direction of the refrigerant so that the refrigerant discharged from the compressor flows to the indoor heat exchanger 220 in the heating mode and flows to the outdoor heat exchanger 250 in the cooling mode.

[0078] The indoor heat exchanger 220 is used to achieve heat transfer between the refrigerant and the indoor air. In the cooling mode, the indoor heat exchanger 220 can act as an evaporator, absorbing the heat indoors and transferring it to the refrigerant in a liquid state, causing the liquid-state refrigerant to evaporate into a gas and achieving a reduction in the indoor temperature; in the heating mode, the indoor heat exchanger 220 can act as a condenser, transferring the heat released by the refrigerant in a vapor state to the indoor air, causing the vapor-state refrigerant to condense into a liquid and achieving an increase in the indoor temperature.

[0079] The working process of the outdoor heat exchanger 250 is opposite to that of the indoor heat exchanger 220. In the cooling mode, the outdoor heat exchanger 250 can act as a condenser, transferring the heat released by the refrigerant in a vapor state to the outdoor air and achieving the conversion of the refrigerant from a vapor state to a liquid state; in the heating mode, the outdoor heat exchanger 250 can act as an evaporator, absorbing the heat outdoors and transferring it to the refrigerant in a liquid state and achieving the conversion of the refrigerant from a liquid state to a vapor state.

[0080] The indoor fan 230 can blow air directly at the indoor heat exchanger 220, which is used to accelerate air flow and improve the heat absorption efficiency and heat dissipation efficiency of the indoor heat exchanger 220.

[0081] The outdoor fan 260 can blow air directly at the outdoor heat exchanger 250, which is used to accelerate air flow and improve the heat absorption efficiency and heat dissipation efficiency of the outdoor heat exchanger 250.

[0082] The indoor reversing device 240 is used to control the flow direction of the refrigerant in the indoor heat exchanger 220. The indoor reversing device 240 can make the flow direction of the refrigerant in the indoor heat exchanger 220 opposite to the direction of the air blown by the indoor fan 230.

[0083] The outdoor reversing device 270 is used to control the flow direction of the refrigerant in the outdoor heat exchanger 250. The outdoor reversing device 270 can make the flow direction of the refrigerant in the outdoor heat exchanger 250 opposite to the direction of the air blown by the outdoor fan 260.

[0084] For the structure of the air-conditioning system, refer to Figure 2 , where the pipelines at both ends of the compression assembly 210 are respectively connected to one end of the indoor reversing device 240 and one end of the outdoor reversing device 270. After the pipeline connecting the indoor reversing device 240 and one end of the compression assembly 210 is connected, it is then respectively connected to both ends of the indoor heat exchanger 220; the indoor fan 230 can be arranged on one side of the indoor heat exchanger 220 and blow air directly at the indoor heat exchanger 220; after the outdoor reversing device 270 is connected to the pipeline at the other end of the compression assembly 210, it is then respectively connected to both ends of the outdoor heat exchanger 250, and the outdoor fan 260 can be arranged on one side of the outdoor heat exchanger 250 and blow air directly at the outdoor heat exchanger 250. One end of the indoor reversing device 240 and the outdoor reversing device 270 are connected.

[0085] The air-conditioning system and locomotive provided by the embodiments of the present application, the compression assembly is respectively communicated with the indoor heat exchanger and the outdoor heat exchanger through pipelines; the indoor fan is used to blow air directly at the indoor heat exchanger, and the indoor reversing device is used to control the flow direction of the refrigerant in the indoor heat exchanger to be opposite to the blowing direction of the indoor fan; the outdoor fan is used to blow air directly at the outdoor heat exchanger, and the outdoor reversing device is used to control the flow direction of the refrigerant in the outdoor heat exchanger to be opposite to the blowing direction of the outdoor fan. Through the indoor reversing device, in the cooling mode and the heating mode, the flow direction of the refrigerant in the indoor heat exchanger is opposite to the blowing direction of the indoor fan; through the outdoor reversing device, in the cooling mode and the heating mode, the flow direction of the refrigerant in the outdoor heat exchanger is opposite to the blowing direction of the outdoor fan, improving the heat exchange efficiency of the indoor heat exchanger and the outdoor heat exchanger, thereby improving the working efficiency of the air-conditioning system.

[0086] Based on any of the above embodiments, the air-conditioning system of the embodiments of the present application will be introduced in detail below with reference to the accompanying drawings.

[0087] Figure 3 It is a schematic structural diagram of the indoor reversing device provided by the embodiments of the present application, as Figure 3 shown, the indoor reversing device includes a first indoor switch 311, a second indoor switch 312, a third indoor switch 313, a fourth indoor switch 314, a first indoor pipeline 321, a second indoor pipeline 322, a first indoor reversing pipeline 323, a second indoor reversing pipeline 324, a first indoor connection point 331, a second indoor connection point 332, a third indoor connection point 333 and a fourth indoor connection point 334.

[0088] Among them, the first indoor pipeline 321 is the pipeline at one end of the indoor heat exchanger. The first indoor connection point 331 and the third indoor connection point 333 are arranged on the first indoor pipeline 321, and the first indoor switch 311 is arranged between the first indoor connection point 331 and the third indoor connection point 333.

[0089] The second indoor pipeline 322 is the pipeline at the other end of the indoor heat exchanger. The second indoor connection point 332 and the fourth indoor connection point 334 are arranged on the second indoor pipeline 322, and the second indoor switch 312 is arranged between the second indoor connection point 332 and the fourth indoor connection point 334.

[0090] The first indoor reversing pipeline 323 is communicated with the first indoor pipeline 321 through the first indoor connection point 331, and the first indoor reversing pipeline 323 is communicated with the second indoor pipeline 322 through the second indoor connection point 332. On the first indoor reversing pipeline 323, that is, between the first indoor connection point 331 and the second indoor connection point 332, a third indoor switch 313 is arranged.

[0091] The second indoor reversing pipeline 324 communicates with the first indoor pipeline 321 through the third indoor connection point 333, and the second indoor reversing pipeline 324 communicates with the second indoor pipeline 322 through the fourth indoor connection point 334. On the second indoor reversing pipeline 324, that is, between the third indoor connection point 333 and the fourth indoor connection point 334, a fourth indoor switch 314 is provided.

[0092] In a possible implementation manner, at least one of the first indoor switch 311, the second indoor switch 312, the third indoor switch 313, and the fourth indoor switch 314 is a one-way valve, and the one-way valve only allows the refrigerant to be transmitted in one direction of the pipeline where the one-way valve is located. Among them, the conduction direction of the first indoor switch 311 is from the first indoor connection point 331 to the third indoor connection point 333; or, the conduction direction of the second indoor switch 312 is from the second indoor connection point 332 to the fourth indoor connection point 334; or, the conduction direction of the third indoor switch 313 is from the second indoor connection point 332 to the first indoor connection point 331; or, the conduction direction of the fourth indoor switch 314 is from the fourth indoor connection point 334 to the third indoor connection point 333.

[0093] Furthermore, the open and closed states of the one-way valve are related to the pressures at both ends of the one-way valve. For example, the conduction direction of the third indoor switch 313 is from the second indoor connection point 332 to the first indoor connection point 331. When the pressure at the second indoor connection point 332 is greater than the pressure at the first indoor connection point 331, the third indoor switch 313 is in the closed state, and the refrigerant can be transmitted from the second indoor connection point 332 to the first indoor connection point 331; when the pressure at the second indoor connection point 332 is less than the pressure at the first indoor connection point 331, the third indoor switch 313 is in the open state, and the refrigerant cannot be transmitted from the second indoor connection point 332 to the first indoor connection point 331.

[0094] In a possible implementation manner, at least one of the first indoor switch 311, the second indoor switch 312, the third indoor switch 313, and the fourth indoor switch 314 is a solenoid valve. When the solenoid valve is in the open state, the refrigerant can be transmitted on the pipeline where the solenoid valve is located. When the solenoid valve is in the closed state, the refrigerant cannot be transmitted on the pipeline where the solenoid valve is located. The open and closed states of the solenoid valve can be controlled by a controller.

[0095] Figure 4 This is a schematic structural diagram of the outdoor reversing device provided by the embodiment of the present application, as Figure 4As shown in the figure, the outdoor commutation device includes a first outdoor switch 411, a second outdoor switch 412, a third outdoor switch 413, a fourth outdoor switch 414, a first outdoor pipeline 421, a second outdoor pipeline 422, a first outdoor commutation pipeline 423, a second outdoor commutation pipeline 424, a first outdoor connection point 431, a second outdoor connection point 432, a third outdoor connection point 433, and a fourth outdoor connection point 434.

[0096] Among them, the first outdoor pipeline 421 is the pipeline at one end of the outdoor heat exchanger. The first outdoor connection point 431 and the third outdoor connection point 433 are provided on the first outdoor pipeline 421, and the first outdoor switch 411 is provided between the first outdoor connection point 431 and the third outdoor connection point 433.

[0097] The second outdoor pipeline 422 is the pipeline at the other end of the outdoor heat exchanger. The second outdoor connection point 432 and the fourth outdoor connection point 434 are provided on the second outdoor pipeline 422, and the second outdoor switch 412 is provided between the second outdoor connection point 432 and the fourth outdoor connection point 434.

[0098] The first outdoor commutation pipeline 423 is communicated with the first outdoor pipeline 421 through the first outdoor connection point 431, and the first outdoor commutation pipeline 423 is communicated with the second outdoor pipeline 422 through the second outdoor connection point 432. On the first outdoor commutation pipeline 423, that is, between the first outdoor connection point 431 and the second outdoor connection point 432, the third outdoor switch 413 is provided.

[0099] The second outdoor commutation pipeline 424 is communicated with the first outdoor pipeline 421 through the third outdoor connection point 433, and the second outdoor commutation pipeline 424 is communicated with the second outdoor pipeline 422 through the fourth outdoor connection point 434. On the second outdoor commutation pipeline 424, that is, between the third outdoor connection point 433 and the fourth outdoor connection point 434, the fourth outdoor switch 414 is provided.

[0100] In a possible implementation manner, at least one of the first outdoor switch 411, the second outdoor switch 412, the third outdoor switch 413, and the fourth outdoor switch 414 is a one-way valve, and the working principle of the one-way valve is the same as that of the one-way valve in the indoor commutation device. Among them, the conduction direction of the first outdoor switch 411 is from the first outdoor connection point 431 to the third outdoor connection point 433; or, the conduction direction of the second outdoor switch 412 is from the second outdoor connection point 432 to the fourth outdoor connection point 434; or, the conduction direction of the third outdoor switch 413 is from the second outdoor connection point 432 to the first outdoor connection point 431; or, the conduction direction of the fourth outdoor switch 414 is from the fourth outdoor connection point 434 to the third outdoor connection point 433.

[0101] In a possible implementation, at least one of the first outdoor switch 411, the second outdoor switch 412, the third outdoor switch 413, and the fourth outdoor switch 414 is a solenoid valve. The working principle of the solenoid valve is the same as that of the solenoid valve in the indoor commutation device, which will not be elaborated here.

[0102] In a possible implementation, each switch in the air-conditioning device can be a check valve. The following combines Figure 5 to illustrate the refrigerant flow directions of the air conditioner in the cooling mode and the heating mode when each switch is a check valve.

[0103] Figure 5 Schematic diagram of the refrigerant flow direction of the air-conditioning system provided by the embodiment of the present application Figure 1 . Among them, the switches in the indoor commutation device and the outdoor commutation device are both check valves. Figure 5 (a) is a schematic diagram of the refrigerant flow direction in the cooling mode. Figure 5 (b) is a schematic diagram of the refrigerant flow direction in the heating mode. As shown in Figure 5, the air-conditioning system includes a compressor 211, a four-way valve 212, an indoor heat exchanger 220, an indoor fan 230, an indoor commutation device 240, an outdoor heat exchanger 250, an outdoor fan 260, an outdoor commutation device 270, and a throttling component 280.

[0104] Among them, the throttling component 280 is used to reduce the temperature and pressure of the refrigerant. The structures and working principles of the above other components are the same as those of the components described in Figures 2 to 4 , which will not be elaborated here. Figure 5 The direction indicated by the arrow in

[0105] See Figure 5 (a). When the air-conditioning system is cooling, the compressor 211 discharges the refrigerant in a high-temperature and high-pressure steam state. After passing through the four-way valve 212, it first flows to the outdoor heat exchanger 250, then flows from the outdoor heat exchanger 250 to the indoor heat exchanger 220, and finally returns to the compressor 211 through the four-way valve 212.

[0106] Specifically, the process of the refrigerant flowing into and out of the outdoor heat exchanger 250 from the four-way valve 212 specifically includes: The refrigerant flows from the four-way valve 212 to the first outdoor connection point in the outdoor reversing device 270. Since the communication direction of the third outdoor switch is from the second outdoor connection point to the first outdoor connection point, the first outdoor reversing pipeline is not connected, and the refrigerant flows into one end of the outdoor heat exchanger 250 through the first outdoor pipeline. The refrigerant condenses from the vapor state to the liquid state in the outdoor heat exchanger 250 and flows out of the other end of the outdoor heat exchanger 250 to the second outdoor connection point of the outdoor reversing device 270. Due to the pressure drop in the outdoor heat exchanger 250, the pressure at the second outdoor connection point is less than the pressure at the first outdoor connection point, and the third outdoor switch is in the off state, that is, the first outdoor reversing pipeline is not connected. At this time, the refrigerant flows from the second outdoor connection point through the second outdoor switch to the fourth outdoor connection point. At this time, the flow direction of the refrigerant in the outdoor heat exchanger 250 is opposite to the blowing direction of the outdoor fan 260.

[0107] The process of the refrigerant flowing into and out of the indoor heat exchanger 220 from the outdoor reversing device 270 specifically includes: After the refrigerant flows from the fourth outdoor connection point to the throttling component 280, it flows to the first indoor connection point of the indoor reversing device 240. At this time, the first indoor pipeline is connected from the first indoor connection point to the third indoor connection point, while the first indoor reversing pipeline is not connected from the first indoor connection point to the second indoor connection point. Therefore, the refrigerant flows into one end of the indoor heat exchanger 220 through the first indoor pipeline. The refrigerant evaporates from the liquid state to the vapor state in the indoor heat exchanger 220 and flows out of the other end of the indoor heat exchanger 220 to the second indoor connection point of the indoor reversing device 240. Due to the pressure drop in the indoor heat exchanger 220, the pressure at the second indoor connection point is less than the pressure at the first indoor connection point, and the third indoor switch is in the off state, that is, the first indoor reversing pipeline is not connected. At this time, the refrigerant flows from the second indoor connection point through the second indoor switch to the fourth indoor connection point. At this time, the flow direction of the refrigerant in the indoor heat exchanger 220 is opposite to the blowing direction of the indoor fan 230.

[0108] After the refrigerant flows out of the indoor reversing device 240, it returns to the compressor 211 through the four-way valve 212, realizing the refrigeration cycle.

[0109] See Figure 5 As shown in (b), when the air conditioning system is in heating mode, the compressor 211 discharges the refrigerant in the form of high-temperature and high-pressure steam. After passing through the four-way valve 212, it first flows to the indoor heat exchanger 220, then flows from the indoor heat exchanger 220 to the outdoor heat exchanger 250, and finally returns to the compressor 211 through the four-way valve 212.

[0110] Specifically, the process of the refrigerant flowing into and out of the indoor heat exchanger 220 from the four-way valve 212 specifically includes: The refrigerant flows from the four-way valve 212 to the fourth indoor connection point in the indoor reversing device 240. Since the communication direction of the second indoor switch is from the second indoor connection point to the fourth indoor connection point, the second indoor pipeline is not connected, and the refrigerant flows into one end of the indoor heat exchanger 220 through the second indoor reversing pipeline. The refrigerant condenses from the vapor state to the liquid state in the indoor heat exchanger 220, flows out of the other end of the indoor heat exchanger 220, and reaches the second indoor connection point of the indoor reversing device 240. Due to the pressure drop in the indoor heat exchanger 220, the pressure at the second indoor connection point is less than the pressure at the fourth indoor connection point, and the second indoor switch is in the off state, that is, the second indoor pipeline is not connected. At this time, the refrigerant flows from the second indoor connection point through the third indoor switch to the first indoor connection point. At this time, the flow direction of the refrigerant in the indoor heat exchanger 220 is opposite to the blowing direction of the indoor fan 230.

[0111] The process of the refrigerant flowing into and out of the outdoor heat exchanger 250 from the indoor reversing device 240 specifically includes: The refrigerant flows from the first indoor connection point to the throttling component 280 and then to the fourth outdoor connection point of the outdoor reversing device 270. At this time, the second outdoor reversing pipeline is in a connected state from the fourth outdoor connection point to the third outdoor connection point, while the second outdoor pipeline is not connected from the fourth outdoor connection point to the second outdoor connection point. Therefore, the refrigerant flows into one end of the outdoor heat exchanger 250 through the second outdoor reversing pipeline. The refrigerant evaporates from the liquid state to the vapor state in the outdoor heat exchanger 250, flows out of the other end of the outdoor heat exchanger 250, and reaches the second outdoor connection point of the outdoor reversing device 270. Due to the pressure drop in the outdoor heat exchanger 250, the pressure at the second outdoor connection point is less than the pressure at the fourth outdoor connection point, and the second outdoor switch is in the off state, that is, the second outdoor pipeline is not connected. At this time, the refrigerant flows from the second outdoor connection point through the third outdoor switch to the first outdoor connection point. At this time, the flow direction of the refrigerant in the outdoor heat exchanger 250 is opposite to the blowing direction of the outdoor fan 260.

[0112] After the refrigerant flows out of the outdoor reversing device 270, it returns to the compressor 211 through the four-way valve 212 to achieve the heating cycle.

[0113] In the embodiment of the present application, by setting the outdoor reversing device and controlling the connection of each pipeline in the outdoor reversing device by the one-way valve, the flow direction of the refrigerant in the outdoor heat exchanger is opposite to the blowing direction of the outdoor fan in the cooling mode and the heating mode of the air-conditioning system; by setting the indoor reversing device and controlling the connection of each pipeline in the indoor reversing device by the one-way valve, the flow direction of the refrigerant in the indoor heat exchanger is opposite to the blowing direction of the outdoor fan in the cooling mode and the heating mode of the air-conditioning system, improving the heat exchange efficiency of the indoor heat exchanger and the outdoor heat exchanger, thereby improving the working efficiency of the air-conditioning system.

[0114] In a possible implementation, each switch in the air-conditioning device can be a solenoid valve. The following combines Figure 6 to illustrate the refrigerant flow directions of the air conditioner in the cooling mode and the heating mode when each switch is a solenoid valve.

[0115] Figure 6 is a schematic diagram of the refrigerant flow direction of the air-conditioning system provided by the embodiment of the present application Figure 2 , where the switches in the indoor reversing device and the outdoor reversing device are both solenoid valves. Figure 6 (a) is a schematic diagram of the refrigerant flow direction in the cooling mode. Figure 6 (b) is a schematic diagram of the refrigerant flow direction in the heating mode. As shown in FIG. 6, the air-conditioning system includes a compressor 211, a four-way valve 212, an indoor heat exchanger 220, an indoor fan 230, an indoor reversing device 240, an outdoor heat exchanger 250, an outdoor fan 260, an outdoor reversing device 270, a four-way valve 212, and a throttling component 280. The structures and working principles of the above components are the same as those of the components described in Figures 2 to 4 and will not be described in detail here. Figure 6 The direction indicated by the arrow in

[0116] See Figure 6 (a). When the air-conditioning system is cooling, the controller controls the first indoor switch, the second indoor switch, the first outdoor switch, and the second outdoor switch to open, and the third indoor switch, the fourth indoor switch, the third outdoor switch, and the fourth outdoor switch to close.

[0117] The process of the refrigerant flowing into and out of the outdoor heat exchanger 250 from the four-way valve 212 specifically includes: the refrigerant flows from the four-way valve 212 to the first outdoor connection point in the outdoor reversing device 270. Since the third outdoor switch and the fourth outdoor switch are closed, the first outdoor reversing pipeline and the second outdoor reversing pipeline are not connected. The refrigerant flows into one end of the outdoor heat exchanger 250 through the first outdoor pipeline, flows out of the other end of the outdoor heat exchanger 250 after passing through the inside of the outdoor heat exchanger 250, and reaches the second outdoor connection point of the outdoor reversing device 270. Since the first outdoor reversing pipeline and the second outdoor reversing pipeline are not connected, the refrigerant flows from the second outdoor connection point through the second outdoor switch to the fourth outdoor connection point. At this time, the flow direction of the refrigerant in the outdoor heat exchanger 250 is opposite to the blowing direction of the outdoor fan 260.

[0118] The process of the refrigerant flowing into and out of the indoor heat exchanger 220 from the outdoor reversing device 270 specifically includes: After the refrigerant flows from the fourth outdoor connection point to the throttling component 280, it flows to the first indoor connection point of the indoor reversing device 240. Since the third indoor switch and the fourth indoor switch are closed, the first indoor reversing pipeline and the second indoor reversing pipeline are not connected. The refrigerant flows into one end of the indoor heat exchanger 220 through the first indoor pipeline. After passing through the inside of the indoor heat exchanger 220, it flows out of the other end of the indoor heat exchanger 220 to the second indoor connection point of the indoor reversing device 240. Since the first indoor reversing pipeline and the second indoor reversing pipeline are not connected, the refrigerant flows from the second indoor connection point through the second indoor switch to the fourth indoor connection point. At this time, the flowing direction of the refrigerant in the indoor heat exchanger 220 is opposite to the blowing direction of the indoor fan 230.

[0119] After the refrigerant flows out of the indoor reversing device 240, it returns to the compressor 211 through the four-way valve 212 to realize the refrigeration cycle.

[0120] See Figure 6 (b). When the air-conditioning system is in the heating mode, the controller controls the third indoor switch, the fourth indoor switch, the third outdoor switch, and the fourth outdoor switch to be turned on, and the first indoor switch, the second indoor switch, the first outdoor switch, and the second outdoor switch to be turned off.

[0121] The process of the refrigerant flowing into and out of the indoor heat exchanger 220 from the four-way valve 212 specifically includes: The refrigerant flows from the four-way valve 212 to the fourth indoor connection point in the indoor reversing device 240. Since the first indoor switch and the second indoor switch are closed, the first indoor pipeline and the second indoor pipeline are not connected. The refrigerant flows into one end of the indoor heat exchanger 220 through the second indoor reversing pipeline. After passing through the inside of the indoor heat exchanger 220, it flows out of the other end of the indoor heat exchanger 220 to the second indoor connection point of the indoor reversing device 240. Since the first indoor pipeline and the second indoor pipeline are not connected, the refrigerant flows from the second indoor connection point through the third indoor switch to the first indoor connection point. At this time, the flowing direction of the refrigerant in the indoor heat exchanger 220 is opposite to the blowing direction of the indoor fan 230.

[0122] The process of the refrigerant flowing into and out of the outdoor heat exchanger 250 from the indoor reversing device 240 specifically includes: after the refrigerant flows from the first indoor connection point to the throttling component 280, it flows to the fourth outdoor connection point of the outdoor reversing device 270. Since the first outdoor switch and the second outdoor switch are closed, the first outdoor pipeline and the second outdoor pipeline are not connected. The refrigerant flows into one end of the outdoor heat exchanger 250 through the second outdoor reversing pipeline. After passing through the inside of the outdoor heat exchanger 250, it flows out of the other end of the outdoor heat exchanger 250 and reaches the second outdoor connection point of the outdoor reversing device 270. Since the first outdoor pipeline and the second outdoor pipeline are not connected, the refrigerant flows from the second outdoor connection point through the third outdoor switch to the first outdoor connection point. At this time, the flow direction of the refrigerant in the outdoor heat exchanger 250 is opposite to the blowing direction of the outdoor fan 260.

[0123] After the refrigerant flows out of the outdoor reversing device 270, it returns to the compressor 211 through the four-way valve 212 to achieve the heating cycle.

[0124] In the embodiment of the present application, by setting the outdoor reversing device and controlling the connection of each pipeline in the outdoor reversing device by the solenoid valve, the flow direction of the refrigerant in the outdoor heat exchanger is opposite to the blowing direction of the outdoor fan in the cooling mode and the heating mode of the air-conditioning system; by setting the indoor reversing device and controlling the connection of each pipeline in the indoor reversing device by the solenoid valve, the flow direction of the refrigerant in the indoor heat exchanger is opposite to the blowing direction of the outdoor fan in the cooling mode and the heating mode of the air-conditioning system, improving the heat exchange efficiency of the indoor heat exchanger and the outdoor heat exchanger, thereby improving the working efficiency of the air-conditioning system.

[0125] In a possible implementation manner, each switch in the air-conditioning device may include a check valve and a solenoid valve. The following combines Figure 7 to illustrate the flow direction of the refrigerant in the cooling mode and the heating mode of the air conditioner when each switch includes a check valve and a solenoid valve.

[0126] Figure 7 This is a schematic diagram of the refrigerant flow direction of the air-conditioning system provided in the embodiment of the present application Figure 3 where the first indoor switch, the second indoor switch, the first outdoor switch, and the second outdoor switch are solenoid valves, and the third indoor switch, the fourth indoor switch, the third outdoor switch, and the fourth outdoor switch are check valves. Figure 7 (a) is a schematic diagram of the refrigerant flow direction in the cooling mode. Figure 7 (b) is a schematic diagram of the refrigerant flow direction in the heating mode. As shown in Figure 7, the air-conditioning system includes a compressor 211, a four-way valve 212, an indoor heat exchanger 220, an indoor fan 230, an indoor reversing device 240, an outdoor heat exchanger 250, an outdoor fan 260, an outdoor reversing device 270, a four-way valve 212, and a throttling component 280. The structures and working principles of the above components are the same as those of the components described in Figures 2 to 4 and will not be elaborated here.Figure 7 The direction indicated by the arrow in [X] is the flowing direction of the refrigerant.

[0127] Figure 7 The working principle of each check valve in [X] is the same as that of the check valve shown in Figure 5 The conducting direction of the switch in the third chamber is from the connection point in the second chamber to the connection point in the first chamber; the conducting direction of the switch in the fourth chamber is from the connection point in the fourth chamber to the connection point in the third chamber; the conducting direction of the switch outside the third chamber is from the connection point outside the second chamber to the connection point outside the first chamber; the conducting direction of the switch outside the fourth chamber is from the connection point outside the fourth chamber to the connection point outside the third chamber.

[0128] Figure 7 The working principle of each solenoid valve in [X] is the same as that of the solenoid valve shown in Figure 6 In the refrigeration mode, the first indoor switch, the second indoor switch, the first outdoor switch and the second outdoor switch are all in the open state; in the heating mode, the first indoor switch, the second indoor switch, the first outdoor switch and the second outdoor switch are all in the closed state.

[0129] In the refrigeration mode, the flowing direction of the refrigerant is as indicated by the arrow in Figure 7 Figure (a), and the flowing direction of the refrigerant is the same as that in Figure 5 Figure (a) and Figure 6 Figure (a), and will not be elaborated here as it is the same as the flowing direction of the refrigerant in Figure (a).

[0130] In the heating mode, the flowing direction of the refrigerant is as indicated by the arrow in Figure 7 Figure (b), and the flowing direction of the refrigerant is the same as that in Figure 5 Figure (b) and Figure 6 Figure (b), and will not be elaborated here as it is the same as the flowing direction of the refrigerant in Figure (b).

[0131] In the embodiment of the present application, by setting an outdoor reversing device, the connection conditions of each pipeline in the outdoor reversing device are jointly controlled by check valves and solenoid valves, so that in the refrigeration mode and the heating mode of the air conditioning system, the flowing direction of the refrigerant in the outdoor heat exchanger is opposite to the blowing direction of the outdoor fan; by setting an indoor reversing device, the connection conditions of each pipeline in the indoor reversing device are jointly controlled by check valves and solenoid valves, so that in the refrigeration mode and the heating mode of the air conditioning system, the flowing direction of the refrigerant in the indoor heat exchanger is opposite to the blowing direction of the outdoor fan, improving the heat exchange efficiency of the indoor heat exchanger and the outdoor heat exchanger, thereby improving the working efficiency of the air conditioning system.

[0132] The embodiment of the present application provides a locomotive, which includes an air conditioning system, and the air conditioning system can be as shown in any of the above embodiments.

[0133] Those skilled in the art will readily conceive of other embodiments of the present application after considering the specification and practicing the invention disclosed herein. The present application is intended to cover any variations, uses, or adaptations of the present application, which follow the general principles of the present application and include common general knowledge or conventional technical means in the technical field not disclosed in the present application. The specification and examples are only illustrative, and the true scope and spirit of the present application are pointed out by the following claims.

[0134] It should be understood that the present application is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present application is only limited by the appended claims.

[0135] In the present application, "and / or" is merely a correlative relationship describing associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, the character " / " in this text indicates that the associated objects before and after are in an "or" relationship.

[0136] "At least one of the following" or its similar expressions refer to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b, or c can represent: a, b, c, a and b, a and c, b and c, or a, b, and c, where each of a, b, and c can itself be an element or a set containing one or more elements.

[0137] "At least one" in the present application means one or more. "Multiple" means two or more. The descriptions such as first and second that appear in the embodiments of the present application are only for illustrative and differentiating the described objects, without an order, and do not represent a special limitation on the number of devices in the embodiments of the present application, and cannot constitute any limitation on the embodiments of the present application. For example, the first threshold and the second threshold are only for differentiating different thresholds, rather than indicating differences in their magnitudes, priorities, or importance levels, etc.

[0138] In the present application, "exemplary", "in some embodiments", "in other embodiments", etc. are used to give examples, illustrations, or explanations. Any embodiment or design solution described as "exemplary" in the present application should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Rather, the use of the word "exemplary" is intended to present concepts in a specific manner.

[0139] In this application, the words "of", "corresponding", "relevant", and "associated" can sometimes be used interchangeably. It should be noted that when the differences are not emphasized, they convey the same meaning. In the embodiments of this application, "communication" and "transmission" can sometimes be used interchangeably. It should be noted that when the differences are not emphasized, they convey the same meaning. For example, "transmission" can include sending and / or receiving, and can be a noun or a verb.

[0140] In this application, "equal to" can be used in combination with "less than" or "greater than", but not simultaneously with both "less than" and "greater than". When "equal to" is used in combination with "less than", the technical solution adopted for "less than" applies. When "equal to" is used in combination with "greater than", the technical solution adopted for "greater than" applies.

[0141] Finally, it should be noted that: After considering the specification and practicing the invention disclosed herein, those skilled in the art will readily conceive of other embodiments of the present invention. The present invention is intended to cover any variations, uses, or adaptations of the present invention, which follow the general principles of the present invention and include common general knowledge or conventional technical means in the technical field not disclosed in the present invention. It is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present invention is only limited by the appended claims.

Claims

1. An air conditioning system, characterized in that: include: Compression assembly, indoor heat exchanger, indoor fan, indoor reversing device, outdoor heat exchanger, outdoor fan and outdoor reversing device, wherein: The compression assembly is connected to the indoor heat exchanger and the outdoor heat exchanger through pipelines respectively; The indoor fan is used to blow air directly toward the indoor heat exchanger, and the indoor reversing device is used to control the flow direction of the refrigerant in the indoor heat exchanger to be opposite to the blowing direction of the indoor fan; The outdoor fan is used to blow air directly toward the outdoor heat exchanger, and the outdoor reversing device is used to control the flow direction of the refrigerant in the outdoor heat exchanger to be opposite to the blowing direction of the outdoor fan.

2. The system according to claim 1, characterized in that The indoor reversing device comprises a first indoor switch, a second indoor switch, a third indoor switch, a fourth indoor switch, a first indoor reversing pipeline and a second indoor reversing pipeline, wherein: The first indoor switch is arranged on a pipeline at one end of the indoor heat exchanger; The second indoor switch is arranged on the pipeline at the other end of the indoor heat exchanger; The third indoor switch is arranged on the first indoor reversing pipeline; The fourth indoor switch is arranged on the second indoor reversing pipeline; The first indoor reversing pipeline is respectively connected to pipelines at both ends of the indoor heat exchanger; The second indoor reversing pipeline is respectively communicated with pipelines at both ends of the indoor heat exchanger.

3. The system according to claim 2, characterized in that The first indoor reversing pipeline is connected to the first indoor pipeline through a first indoor connection point on the first indoor pipeline, and the first indoor pipeline is a pipeline at one end of the indoor heat exchanger; The first indoor reversing pipeline is connected to the second indoor pipeline through a second indoor connection point on the second indoor pipeline, and the second indoor pipeline is the pipeline at the other end of the indoor heat exchanger; The second indoor reversing pipeline is connected to the first indoor pipeline through a third indoor connection point on the first indoor pipeline; The second indoor reversing pipeline is communicated with the second indoor pipeline through a fourth indoor connecting point on the second indoor pipeline.

4. The system according to claim 3, characterized in that The first indoor switch is arranged between the first indoor connection point and the third indoor connection point; The second indoor switch is arranged between the second indoor connection point and the fourth indoor connection point.

5. The system according to claim 3 or 4, characterized in that: At least one of the first indoor switch, the second indoor switch, the third indoor switch and the fourth indoor switch is a one-way valve, wherein: The conducting direction of the first indoor switch is from the first indoor connection point to the third indoor connection point; or, The conduction direction of the second indoor switch is from the second indoor connection point to the fourth indoor connection point; or, The conduction direction of the third indoor switch is from the second indoor connection point to the first indoor connection point; or, The conducting direction of the fourth indoor switch is from the fourth indoor connection point to the third indoor connection point.

6. The system according to claim 1, characterized in that The outdoor reversing device includes a first outdoor switch, a second outdoor switch, a third outdoor switch, a fourth outdoor switch, a first outdoor reversing pipeline and a second outdoor reversing pipeline, wherein: The first outdoor switch is arranged on a pipeline at one end of the outdoor heat exchanger; The second outdoor switch is arranged on the pipeline at the other end of the outdoor heat exchanger; The third outdoor switch is arranged on the first outdoor reversing pipeline; The fourth outdoor switch is arranged on the second outdoor reversing pipeline; The first outdoor reversing pipeline is respectively connected to pipelines at both ends of the outdoor heat exchanger; The second outdoor reversing pipeline is respectively communicated with pipelines at both ends of the outdoor heat exchanger.

7. The system according to claim 6, characterized in that The first outdoor reversing pipeline is connected to the first outdoor pipeline through a first outdoor connection point on the first outdoor pipeline, and the first outdoor pipeline is a pipeline at one end of the outdoor heat exchanger; The first outdoor reversing pipeline is connected to the second outdoor pipeline through a second outdoor connection point on the second outdoor pipeline, and the second outdoor pipeline is the pipeline at the other end of the outdoor heat exchanger; The second outdoor reversing pipeline is connected to the first outdoor pipeline through a third outdoor connection point on the first outdoor pipeline; The second outdoor reversing pipeline is connected to the second outdoor pipeline through a fourth outdoor connection point on the second outdoor pipeline.

8. The system according to claim 7, characterized in that The first outdoor switch is arranged between the first outdoor connection point and the third outdoor connection point; The second outdoor switch is disposed between the second outdoor connection point and the fourth outdoor connection point.

9. The system according to claim 7 or 8, characterized in that: At least one of the first outdoor switch, the second outdoor switch, the third outdoor switch and the fourth outdoor switch is a one-way valve, wherein: The conducting direction of the first outdoor switch is from the first outdoor connection point to the third outdoor connection point; or, The conduction direction of the second outdoor switch is from the second outdoor connection point to the fourth outdoor connection point; or, The conduction direction of the third outdoor switch is from the second outdoor connection point to the first outdoor connection point; or, The conducting direction of the fourth outdoor switch is from the fourth outdoor connection point to the third outdoor connection point.

10. The system according to claim 2 or 6, characterized in that: The system further includes a controller, at least one of the first indoor switch, the first outdoor switch, the second indoor switch, the second outdoor switch, the third indoor switch, the third outdoor switch, the fourth indoor switch and the fourth outdoor switch is a solenoid valve, wherein: The controller is used to control the switching states of the solenoid valves in the first indoor switch, the first outdoor switch, the second indoor switch, the second outdoor switch, the third indoor switch, the third outdoor switch, the fourth indoor switch and the fourth outdoor switch.

11. A locomotive, characterized in that: An air conditioning system comprising any one of claims 1-10.

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