Air conditioning system

Abstract

The invention provides an air conditioning system, and belongs to the technical field of electrical equipment. The air conditioning system comprises a first heating device, a first control valve, a second control valve and a controller. And the controller is used for controlling the port A to communicate with the port B, controlling the port C to communicate with the port D and controlling the port E to communicate with the port F when the air conditioning system is in a heating mode and the outdoor temperature is within a preset temperature range, so that a refrigerant firstly absorbs part of heat in the outdoor heat exchanger and then flows into the first heating device to absorb heat. By the adoption of the air conditioning system, the first heating device shares a part of heat exchange burden for the outdoor heat exchanger, the heat exchange degree of the outdoor heat exchanger is reduced, the frosting time of the outdoor heat exchanger is delayed, then the reverse defrosting frequency is reduced, and the heating efficiency of the air conditioning system in the heating mode is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of electrical equipment, and in particular to an air conditioning system. Background Art

[0002] The air conditioning system usually includes a compressor, an indoor heat exchanger, a throttle valve and an outdoor heat exchanger, which are connected in sequence to form a heat exchange loop. When the air conditioning system is in heating mode, the refrigerant in the heat exchange loop absorbs heat from the external environment in the outdoor heat exchanger, and then circulates to the indoor heat exchanger to release heat to the indoor air, thereby achieving the heating function. However, when the air conditioning system is in a low-temperature operating condition (i.e., the outdoor heat exchanger is located in a low-temperature environment), after running for a period of time, frost is very likely to form on the outdoor heat exchanger, reducing the heat absorption efficiency of the refrigerant in the outdoor heat exchanger.

[0003] To solve the above-mentioned frosting problem, the air conditioning system occasionally performs reverse defrosting when heating. During reverse defrosting, the refrigerant absorbs heat from the indoor environment in the indoor heat exchanger, and then circulates to the outdoor heat exchanger to release heat, thereby achieving defrosting.

[0004] However, in a low-temperature environment, the outdoor heat exchanger frosts quickly, and the air-conditioning system needs to enter the reverse defrost mode after working in the heating mode for a short period of time, which reduces the heating effect of the air-conditioning system in the heating mode. Summary of the invention

[0005] The embodiment of the present disclosure provides an air conditioning system, which can improve the heating effect of the air conditioning system in the heating mode. The technical solution is as follows:

[0006] The embodiment of the present disclosure provides an air conditioning system, characterized in that the air conditioning system includes a compressor, an indoor heat exchanger, an outdoor heat exchanger, a throttle valve, a first heating device, a first control valve, a second control valve, a temperature sensor and a controller;

[0007] The first end of the throttle valve is in communication with the first end of the indoor heat exchanger, and the second end of the throttle valve is in communication with the first end of the outdoor heat exchanger;

[0008] The first end of the first heating device is in communication with the second end of the outdoor heat exchanger;

[0009] The first control valve has an A port, a B port, a C port and a D port, the A port is connected to the second end of the indoor heat exchanger, the B port is connected to the outlet end of the compressor, and the D port is connected to the inlet end of the compressor;

[0010] The second control valve has an E port, an F port and a G port, the E port is in communication with the C port, the F port is in communication with the second end of the first heating device, and the G port is in communication with the second end of the outdoor heat exchanger;

[0011] The temperature sensor is used to detect the outdoor temperature;

[0012] The controller is used to control the A port to be connected to the B port, control the C port to be connected to the D port, and control the E port to be connected to the F port when the air conditioning system is in heating mode and the outdoor temperature is within a preset temperature range.

[0013] In a possible implementation, the controller is further used to control the opening of the throttle valve so that the superheat at the inlet end of the compressor is within a preset superheat range.

[0014] In one possible implementation, the controller is also used to control the A port to be connected to the B port, control the C port to be connected to the D port, and control the E port to be connected to the G port when the air-conditioning system is in heating mode and the outdoor temperature is outside the preset temperature range.

[0015] In a possible implementation, the controller is further used to control the A port to be connected to the D port, control the B port to be connected to the C port, and control the E port to be connected to the G port when the air-conditioning system is in a cooling mode.

[0016] In a possible implementation manner, the first heating device is an electric heating device.

[0017] In one possible implementation, the first heating device is a high-temperature regenerator, and the first heating device has a first flow channel and a second flow channel, the first end of the first flow channel is connected to the B port, the second end of the first flow channel is connected to the outlet end of the compressor, the first end of the second flow channel is the first end of the first heating device, and the second end of the second flow channel is the second end of the first heating device.

[0018] In a possible implementation, the air conditioning system further includes a second heating device, a first end of the second heating device being connected to the second end of the outdoor heat exchanger and the G port, and a second end of the second heating device being connected to the first end of the first heating device.

[0019] In a possible implementation manner, the second heating device is an electric heating device.

[0020] In one possible implementation, the second heating device is a low-temperature regenerator, and the second heating device has a third flow channel and a fourth flow channel, the first end of the third flow channel is connected to the first end of the indoor heat exchanger, the second end of the third flow channel is connected to the first end of the throttle valve, the first end of the fourth flow channel is the first end of the second heating device, and the second end of the fourth flow channel is the second end of the second heating device.

[0021] In a possible implementation, the air conditioning system further includes a third heating device, a first end of the third heating device is connected to the second end of the outdoor heat exchanger, and a second end of the third heating device is connected to the first end of the first heating device and the G port.

[0022] In a possible implementation, the third heating device is an electric heating device.

[0023] In one possible implementation, the air-conditioning system also includes a heat exchange device, which has a fifth flow channel and a sixth flow channel, the first end of the fifth flow channel is connected to the first end of the indoor heat exchanger, the second end of the fifth flow channel is connected to the first end of the throttle valve, the first end of the sixth flow channel is connected to the second end of the outdoor heat exchanger, and the second end of the sixth flow channel is connected to the first end of the first heating device and the G port.

[0024] The technical solution provided by the embodiments of the present disclosure includes at least the following beneficial effects:

[0025] An embodiment of the present disclosure provides an air-conditioning system. When the air-conditioning system is in a heating mode and the outdoor temperature is within a preset temperature range, it means that the outdoor heat exchanger is in a low-temperature and frosty environment. At this time, the controller can control the A port of the first control valve to be connected to the B port, the C port to be connected to the D port, and control the E port of the second control valve to be connected to the F port, so that the low-temperature and low-pressure refrigerant can first absorb a part of the heat in the outdoor heat exchanger, and then flow into the first heating device to absorb a part of the heat. In this way, the first heating device can share a part of the heat exchange burden for the outdoor heat exchanger, reduce the heat exchange degree of the outdoor heat exchanger, thereby delaying the frosting time of the outdoor heat exchanger, and then reduce the frequency of reverse defrosting, thereby increasing the heating efficiency of the air-conditioning system in the heating mode.

[0026] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 is a structural schematic diagram of an air conditioning system shown in an embodiment of the present disclosure;

[0029] Figure 2 is a schematic diagram of a working state of an air conditioning system when the air conditioning system is in a heating mode and the outdoor temperature is within a preset temperature range, shown in an embodiment of the present disclosure;

[0030] Figure 3 is a schematic diagram of a working state of an air conditioning system when the air conditioning system is in a heating mode and the outdoor temperature is outside a preset temperature range, shown in an embodiment of the present disclosure;

[0031] Figure 4 is a schematic diagram of a working state of an air-conditioning system when the air-conditioning system is in a cooling mode, shown in an embodiment of the present disclosure;

[0032] Figure 5 is a structural schematic diagram of an air conditioning system shown in an embodiment of the present disclosure;

[0033] Figure 6 is a schematic diagram of a working state of an air conditioning system when the air conditioning system is in a heating mode and the outdoor temperature is within a preset temperature range, shown in an embodiment of the present disclosure;

[0034] Figure 7 is a schematic diagram of a working state of an air conditioning system when the air conditioning system is in a heating mode and the outdoor temperature is outside a preset temperature range, shown in an embodiment of the present disclosure;

[0035] Figure 8 is a schematic diagram of a working state of an air-conditioning system when the air-conditioning system is in a cooling mode, shown in an embodiment of the present disclosure;

[0036] Fig. 9 is a structural schematic diagram of an air conditioning system shown in an embodiment of the present disclosure;

[0037] Fig.10 is a schematic diagram of a working state of an air conditioning system when the air conditioning system is in a heating mode and the outdoor temperature is within a preset temperature range, shown in an embodiment of the present disclosure;

[0038] Fig.11is a schematic diagram of a working state of an air conditioning system when the air conditioning system is in a heating mode and the outdoor temperature is outside a preset temperature range, shown in an embodiment of the present disclosure;

[0039] Fig.12 is a schematic diagram of a working state of an air-conditioning system when the air-conditioning system is in a cooling mode, shown in an embodiment of the present disclosure;

[0040] Fig.13 is a structural schematic diagram of an air conditioning system shown in an embodiment of the present disclosure;

[0041] Fig.14 is a schematic diagram of a working state of an air conditioning system when the air conditioning system is in a heating mode and the outdoor temperature is within a preset temperature range, shown in an embodiment of the present disclosure;

[0042] Fig.15 is a schematic diagram of a working state of an air conditioning system when the air conditioning system is in a heating mode and the outdoor temperature is outside a preset temperature range, shown in an embodiment of the present disclosure;

[0043] Fig.16 is a schematic diagram of a working state of an air-conditioning system when the air-conditioning system is in a cooling mode, shown in an embodiment of the present disclosure;

[0044] Fig.17 is a structural schematic diagram of an air conditioning system shown in an embodiment of the present disclosure;

[0045] Fig.18 is a schematic diagram of a working state of an air conditioning system when the air conditioning system is in a heating mode and the outdoor temperature is within a preset temperature range, shown in an embodiment of the present disclosure;

[0046] Fig.19 is a schematic diagram of a working state of an air conditioning system when the air conditioning system is in a heating mode and the outdoor temperature is outside a preset temperature range, shown in an embodiment of the present disclosure;

[0047] Fig. 20 is a schematic diagram of a working state of an air-conditioning system when the air-conditioning system is in a cooling mode, shown in an embodiment of the present disclosure;

[0048] Fig.21 is a structural schematic diagram of an air conditioning system shown in an embodiment of the present disclosure;

[0049] Fig. 22 is a schematic diagram of a working state of an air conditioning system when the air conditioning system is in a heating mode and the outdoor temperature is within a preset temperature range, shown in an embodiment of the present disclosure;

[0050] Fig.23is a schematic diagram of a working state of an air conditioning system when the air conditioning system is in a heating mode and the outdoor temperature is outside a preset temperature range, shown in an embodiment of the present disclosure;

[0051] Fig.24 is a schematic diagram of a working state of an air-conditioning system when the air-conditioning system is in a cooling mode, shown in an embodiment of the present disclosure;

[0052] Fig.25 It is a schematic diagram of the experimental effect of an air-conditioning system shown in an embodiment of the present disclosure.

[0053] Legend

[0054] 1. Compressor; 2. Indoor heat exchanger; 3. Outdoor heat exchanger; 4. Throttle valve; 5. First heating device; 6. First control valve; 7. Second control valve; 8. Second heating device; 9. Third heating device; 10. Heat exchange device;

[0055] 11. The outlet of the compressor; 12. The inlet of the compressor;

[0056] 21. A first end of an indoor heat exchanger; 22. A second end of an indoor heat exchanger;

[0057] 31. A first end of an outdoor heat exchanger; 32. A second end of an outdoor heat exchanger;

[0058] 41. a first end of the throttle valve; 42. a second end of the throttle valve;

[0059] 51. a first end of a first heating device; 52. a second end of a first heating device; 53. a first flow channel; 54. a second flow channel;

[0060] 531, a first end of the first flow channel; 532, a second end of the first flow channel;

[0061] A, A port; B, B port; C, C port; D, D port;

[0062] E, E port; F, F port; G, G port;

[0063] 81. a first end of a second heating device; 82. a second end of a second heating device; 83. a third flow channel; 84. a fourth flow channel;

[0064] 831, a first end of the third flow channel; 832, a second end of the third flow channel;

[0065] 91. A first end of a third heating device; 92. A second end of a third heating device;

[0066] 101, fifth flow channel; 102, sixth flow channel;

[0067] 1011, a first end of the fifth flow channel; 1012, a second end of the fifth flow channel; 1021, a first end of the sixth flow channel; 1022, a second end of the sixth flow channel. DETAILED DESCRIPTION

[0068] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0069] The present disclosure provides an air conditioning system. Figure 1 As shown, the air conditioning system includes a compressor 1, an indoor heat exchanger 2, an outdoor heat exchanger 3, a throttle valve 4, a first heating device 5, a first control valve 6, a second control valve 7, a temperature sensor and a controller.

[0070] Among them, the compressor 1 has an inlet end and an outlet end connected to each other, the indoor heat exchanger 2 has a first end 21 of the indoor heat exchanger 2 and a second end 22 of the indoor heat exchanger 2 connected to each other, the outdoor heat exchanger 3 has a first end 31 of the outdoor heat exchanger 3 and a second end 32 of the outdoor heat exchanger 3 connected to each other, the throttle valve 4 has a first end 41 of the throttle valve 4 and a second end 42 of the throttle valve 4 connected to each other, the first heating device 5 has a first end 51 of the first heating device 5 and a second end 52 of the first heating device 5 connected to each other, the first control valve 6 has an A port, a B port, a C port and a D port, and the A port, the B port, the C port and the D port can realize communication between any two ports, and the second control valve 7 has an E port, an F port and a G port, and the E port, the F port and the G port can realize communication between any two ports.

[0071] The first end 41 of the throttle valve 4 is in communication with the first end 21 of the indoor heat exchanger 2, and the second end 42 of the throttle valve 4 is in communication with the first end 31 of the outdoor heat exchanger 3. The first end 51 of the first heating device 5 is in communication with the second end 32 of the outdoor heat exchanger 3. The A port of the first control valve 6 is in communication with the second end 22 of the indoor heat exchanger 2, the B port of the first control valve 6 is in communication with the outlet end 11 of the compressor 1, and the D port of the first control valve 6 is in communication with the inlet end 12 of the compressor 1. The E port of the second control valve 7 is in communication with the C port of the first control valve 6, the F port of the second control valve 7 is in communication with the second end 52 of the first heating device 5, and the G port of the second control valve 7 is in communication with the second end 32 of the outdoor heat exchanger 3.

[0072] The temperature sensor is located outdoors and can be fixed at any position that can detect the outdoor temperature. For example, it can be fixed at the same position as the outdoor heat exchanger 3, or fixed on the outdoor heat exchanger 3, etc. The embodiment of the present disclosure does not specifically limit the fixing position of the temperature sensor.

[0073] The controller may be electrically connected to the compressor 1, the indoor heat exchanger 2, the outdoor heat exchanger 3, the throttle valve 4, the first heating device 5, the first control valve 6, the second control valve 7, and the temperature sensor, respectively.

[0074] The temperature sensor can periodically detect the outdoor temperature and then send the detected outdoor temperature to the controller.

[0075] The controller pre-stores a preset temperature range, which is the outdoor temperature at which the outdoor heat exchanger 3 is prone to frost. It can be set according to actual conditions. For example, the preset temperature range can be -7 degrees Celsius to 5 degrees Celsius, etc. The embodiment of the present disclosure does not make specific limitations on this.

[0076] In implementation, when the air conditioning system enters the heating mode, the controller will first determine whether the outdoor temperature received from the temperature sensor is within a preset temperature range.

[0077] If the outdoor temperature is within the preset temperature range, it means that the outdoor heat exchanger 3 is operating in a low temperature environment prone to frost. Figure 2 As shown, the controller can control the first control valve 6 to connect the A port with the B port ( Figure 2 Connect port C to port D ( Figure 2 The second control valve 7 is controlled to connect the E port with the F port ( Figure 2 The two triangles filled with black are the two connected ports).

[0078] like Figure 2 As shown, at this time, the working state of the air-conditioning system is: the outlet end 11 of the compressor 1 outputs high-temperature and high-pressure refrigerant, and the high-temperature and high-pressure refrigerant enters the indoor heat exchanger 2 through the B port, the A port, and the second end 22 of the indoor heat exchanger 2 to release heat, thereby heating the room, and the high-temperature and high-pressure refrigerant becomes low-temperature and high-pressure refrigerant, and the low-temperature and high-pressure refrigerant passes through the first end 21 of the indoor heat exchanger 2 and the first end 41 of the throttle valve 4 and enters the throttle valve 4 to reduce the pressure, and the low-temperature and high-pressure refrigerant becomes low-temperature and low-pressure refrigerant, and the low-temperature and low-pressure refrigerant passes through the second end 42 of the throttle valve 4 and the outdoor heat exchanger. The first end 31 of 3 enters the outdoor heat exchanger 3 to absorb heat, and the low-temperature and low-pressure refrigerant becomes a high-temperature and low-pressure refrigerant. The high-temperature and low-pressure refrigerant passes through the second end 32 of the outdoor heat exchanger 3 and the first end 51 of the first heating device 5 and enters the first heating device 5 for further heating. The heated refrigerant passes through the second end 52 of the first heating device 5, the F port, the E port, the C port, the D port, and the inlet end 12 of the compressor 1 and enters the compressor 1 for compression, thereby obtaining a high-temperature and high-pressure refrigerant, and the high-temperature and high-pressure refrigerant flows out from the outlet end 11 of the compressor 1, thereby realizing circulation.

[0079] In the above process, the controller realizes the heating mode of the air-conditioning system by controlling the first control valve 6 and the second control valve 7, and connects the first heating device 5 between the second end 32 of the outdoor heat exchanger 3 and the inlet end 12 of the compressor 1, so that the first heating device 5 can share part of the heat exchange burden for the outdoor heat exchanger 3, reduce the heat exchange degree of the outdoor heat exchanger 3, thereby delaying the frosting time of the outdoor heat exchanger 3, and then can reduce the frequency of reverse defrosting, increase the heating efficiency of the air-conditioning system in the heating mode, and improve the comprehensive energy efficiency COP (Coefficient Of Performance).

[0080] In one possible implementation, the controller is also used to control port A to be connected to port B, port C to be connected to port D, and port E to be connected to port G when the air-conditioning system is in heating mode and the outdoor temperature is outside a preset temperature range.

[0081] In implementation, when the air conditioning system enters the heating mode, the controller will first determine whether the outdoor temperature received from the temperature sensor is within a preset temperature range.

[0082] If the outdoor temperature is outside the preset temperature range, it means that although the outdoor heat exchanger 3 is located in a relatively low temperature environment, it is not easy for the outdoor heat exchanger 3 to frost in this environment. Figure 3 As shown, the controller can control the first control valve 6 to connect the A port with the B port ( Figure 3 Connect port C to port D ( Figure 3 The second control valve 7 is controlled to connect the E port with the G port ( Figure 3 The two triangles filled with black are the two connected ports).

[0083] like Figure 3As shown, at this time, the working state of the air-conditioning system is: the outlet end 11 of the compressor 1 outputs high-temperature and high-pressure refrigerant, and the high-temperature and high-pressure refrigerant enters the indoor heat exchanger 2 through the B port, the A port, and the second end 22 of the indoor heat exchanger 2 to release heat, thereby heating the indoor room, and the high-temperature and high-pressure refrigerant becomes a low-temperature and high-pressure refrigerant, and the low-temperature and high-pressure refrigerant passes through the first end 21 of the indoor heat exchanger 2 and the first end 41 of the throttle valve 4 to enter the throttle valve 4 for pressure reduction, and the low-temperature and high-pressure refrigerant becomes a low-temperature and low-pressure refrigerant, and the low-temperature and low-pressure refrigerant passes through the second end 42 of the throttle valve 4 and the first end 31 of the outdoor heat exchanger 3 to enter the outdoor heat exchanger 3 for heat absorption, and the low-temperature and low-pressure refrigerant becomes a high-temperature and low-pressure refrigerant, and the high-temperature and low-pressure refrigerant passes through the second end 32 of the outdoor heat exchanger 3, the G port, the E port, the C port, the D port, and the inlet end 12 of the compressor 1 into the compressor 1 for compression, thereby obtaining a high-temperature and high-pressure refrigerant, and the high-temperature and high-pressure refrigerant flows out from the outlet end 11 of the compressor 1, thereby realizing circulation.

[0084] In the above process, the controller realizes the heating mode of the air-conditioning system by controlling the first control valve 6 and the second control valve 7. In addition, since the outdoor heat exchanger 3 is not easy to frost at this time and the refrigerant is sufficient to absorb sufficient heat in the outdoor heat exchanger 3, there is no need for the first heating device 5 to share the heat exchange burden of the outdoor heat exchanger 3. At this time, the E port is connected to the G port by controlling the second control valve 7, so that the first heating device 5 is bypassed, so that the refrigerant does not need to enter the first heating device 5 for further heating, thereby improving the energy efficiency of the air-conditioning system.

[0085] In a possible implementation, the controller is also used to control the opening of the throttle valve 4 so that the superheat at the inlet end 12 of the compressor 1 is within a preset superheat range.

[0086] The superheat degree of the inlet end 12 of the compressor 1 may be a first temperature value at the inlet end 12 of the compressor 1 and a second temperature value at the refrigerant inlet of the outdoor heat exchanger 3 .

[0087] In implementation, temperature sensors can be respectively arranged at the inlet end 12 of the compressor 1 and at the refrigerant inlet of the outdoor heat exchanger 3. The temperature sensors at the corresponding positions send the detected temperature to the controller, and the controller determines the superheat of the inlet end 12 of the compressor 1 based on the temperature difference between the first temperature value and the second temperature value obtained.

[0088] If the superheat is within the preset superheat range, it means that the working efficiency of each part is normal at this time. If the superheat is outside the preset superheat range, the working efficiency of each part is abnormal at this time, and the indoor heat exchanger 2 may not be able to provide enough heat. Therefore, at this time, the controller can gradually adjust the opening of the throttle valve 4 until the detected superheat of the inlet end 12 of the compressor 1 is within the preset superheat range, so as to improve the energy efficiency of the air conditioning system.

[0089] Among them, the preset superheat range can be set according to needs. For example, in the embodiment of the present disclosure, the preset superheat range can be 2 degrees Celsius to 3 degrees Celsius, etc., and the embodiment of the present disclosure does not make specific limitations on this.

[0090] In a possible implementation, the controller is further configured to control the A port to be connected to the D port, control the B port to be connected to the C port, and control the E port to be connected to the G port when the air-conditioning system is in a cooling mode.

[0091] In implementation, Figure 4 As shown, at this time, the working state of the air-conditioning system is: the outlet end 11 of the compressor 1 outputs high-temperature and high-pressure refrigerant, and the high-temperature and high-pressure refrigerant enters the outdoor heat exchanger 3 through the B port, the C port, the E port, the G port, and the second end 32 of the outdoor heat exchanger 3 to release heat, and the high-temperature and high-pressure refrigerant becomes a low-temperature and high-pressure refrigerant, and the low-temperature and high-pressure refrigerant passes through the first end 31 of the outdoor heat exchanger 3 and the second end 42 of the throttle valve 4 to enter the throttle valve 4 for pressure reduction, and the low-temperature and high-pressure refrigerant becomes a low-temperature and low-pressure refrigerant, and the low-temperature and low-pressure refrigerant passes through the first end 41 of the throttle valve 4 and the first end 21 of the indoor heat exchanger 2 to enter the indoor heat exchanger 2 for heat absorption, thereby cooling the room, and the low-temperature and low-pressure refrigerant becomes a high-temperature and low-pressure refrigerant, and the high-temperature and low-pressure refrigerant passes through the second end 22 of the indoor heat exchanger 2, the A port, the D port, and the inlet end 12 of the compressor 1 into the compressor for compression, thereby obtaining a high-temperature and high-pressure refrigerant, and the high-temperature and high-pressure refrigerant flows out from the outlet end 11 of the compressor 1, thereby realizing circulation.

[0092] In the above process, the controller realizes the cooling mode of the air-conditioning system by controlling the first control valve 6 and the second control valve 7. Moreover, since the air-conditioning system is in the cooling mode at this time, there is no need for the first heating device 5 to further heat the high-temperature and high-pressure refrigerant flowing out of the outlet port 11 of the compressor 1. Therefore, the E port is connected to the G port by controlling the second control valve 7, thereby bypassing the first heating device 5, so that the refrigerant no longer needs to enter the first heating device 5.

[0093] In a possible implementation, the first heating device 5 in the embodiment of the present disclosure may be an electric heating device, so that the heating efficiency of the first heating device 5 can be improved, thereby improving the heating efficiency of the air-conditioning system.

[0094] When the first heating device 5 is an electric heating device, the working state of the air conditioning system is the same as described above and will not be repeated here.

[0095] In another possible implementation, the first heating device 5 in the embodiment of the present disclosure may be a high-temperature regenerator, such as Figure 5 As shown, the first heating device 5 has a first flow channel 53 and a second flow channel 54 which exchange heat with each other.

[0096] The first end 531 of the first flow channel 53 is connected to the B port, the second end 532 of the first flow channel 53 is connected to the outlet end 11 of the compressor 1, the first end of the second flow channel 54 is the first end 51 of the first heating device 5, that is, the first end of the second flow channel 54 is connected to the second end 32 of the outdoor heat exchanger 3, and the second end of the second flow channel 54 is the second end 52 of the first heating device 5, that is, the second end of the second flow channel 54 is connected to the F port.

[0097] When the air conditioning system is in heating mode and the outdoor temperature is within the preset temperature range, Figure 6 As shown, the working state of the air-conditioning system is: the outlet end 11 of the compressor 1 outputs high-temperature and high-pressure refrigerant, the high-temperature and high-pressure refrigerant enters the first flow channel 53 through the second end 532 of the first flow channel 53 to release heat, and the refrigerant after heat release passes through the first end 531 of the first flow channel 53, the B port, the A port, and the second end 22 of the indoor heat exchanger 2 to enter the indoor heat exchanger 2 to release heat, thereby heating the room, and the refrigerant becomes low-temperature and high-pressure refrigerant, and the low-temperature and high-pressure refrigerant passes through the first end 21 of the indoor heat exchanger 2 and the first end 41 of the throttle valve 4 to enter the throttle valve 4 for pressure reduction, and the low-temperature and high-pressure refrigerant becomes low-temperature and low-pressure refrigerant, and the low-temperature and low-pressure The refrigerant passes through the second end 42 of the throttle valve 4 and the first end 31 of the outdoor heat exchanger 3 and enters the outdoor heat exchanger 3 to absorb heat, and the low-temperature and low-pressure refrigerant becomes a high-temperature and low-pressure refrigerant. The high-temperature and low-pressure refrigerant passes through the second end 32 of the outdoor heat exchanger 3 and the first end of the second flow channel 54 and enters the second flow channel 54 to further absorb the heat released by the first flow channel 53. The refrigerant after absorbing heat passes through the second end of the second flow channel 54, the F port, the E port, the C port, the D port, and the inlet end 12 of the compressor 1 and enters the compressor 1 for compression, thereby obtaining a high-temperature and high-pressure refrigerant, and the high-temperature and high-pressure refrigerant flows out from the outlet end 11 of the compressor 1, thereby realizing circulation.

[0098] In the above process, the controller realizes the heating mode of the air-conditioning system by controlling the first control valve 6 and the second control valve 7, and the first heating device 5 shares part of the heat exchange burden for the outdoor heat exchanger 3, reducing the heat exchange degree of the outdoor heat exchanger 3, thereby delaying the frosting time of the outdoor heat exchanger 3, thereby reducing the frequency of reverse defrosting, and increasing the heating efficiency of the air-conditioning system in the heating mode.

[0099] Furthermore, although the high-temperature and high-pressure refrigerant flowing out of the outlet port 11 of the compressor 1 releases heat in the first flow channel 53 first, the controller can control the superheat of the inlet port 12 of the compressor 1 to be within a preset superheat range by adjusting the opening of the throttle valve 4, thereby increasing the flow rate of the high-temperature and high-pressure refrigerant flowing out of the outlet port 11 of the compressor 1. Even if this refrigerant with a larger flow rate releases a part of its heat in the first flow channel 53 first, the heat released when it enters the indoor heat exchanger 2 is sufficient to achieve indoor heating, that is, the first heating device 5 will not affect the normal operation of the indoor heating mode, and the indoor heating mode can operate at normal working efficiency.

[0100] When the air conditioning system is in heating mode and the outdoor temperature is outside the preset temperature range, Figure 7 As shown, the working state of the air conditioning system is: the outlet end 11 of the compressor 1 outputs high-temperature and high-pressure refrigerant, the high-temperature and high-pressure refrigerant passes through the first flow channel 53, the B port, the A port, and the second end 22 of the indoor heat exchanger 2 to enter the indoor heat exchanger 2 to release heat, thereby heating the room, and the high-temperature and high-pressure refrigerant becomes low-temperature and high-pressure refrigerant, the low-temperature and high-pressure refrigerant passes through the first end 21 of the indoor heat exchanger 2 and the first end 41 of the throttle valve 4 to enter the throttle valve 4 to reduce the pressure, and the low-temperature and high-pressure refrigerant becomes low-temperature and low-pressure refrigerant. The low-temperature and low-pressure refrigerant passes through the second end 42 of the throttle valve 4 and the first end 31 of the outdoor heat exchanger 3 to enter the outdoor heat exchanger 3 to absorb heat, and the low-temperature and low-pressure refrigerant becomes a high-temperature and low-pressure refrigerant. The high-temperature and low-pressure refrigerant passes through the second end 32 of the outdoor heat exchanger 3, the G port, the E port, the C port, the D port, and the inlet end 12 of the compressor 1 and enters the compressor 1 for compression, thereby obtaining a high-temperature and high-pressure refrigerant, and the high-temperature and high-pressure refrigerant flows out from the outlet end 11 of the compressor 1, thereby realizing circulation.

[0101] In the above process, since the outdoor heat exchanger 3 is not easy to frost and the refrigerant can absorb enough heat in the outdoor heat exchanger 3, there is no need for the first heating device 5 to share the heat exchange burden of the outdoor heat exchanger 3. At this time, the E port is connected to the G port by controlling the second control valve 7, so that the second flow channel 54 of the first heating device 5 is bypassed, so that the refrigerant does not need to enter the second flow channel 54 for further heat absorption, thereby improving the energy efficiency of the air-conditioning system.

[0102] It is understandable that since the refrigerant no longer flows into the second flow channel 54 for heat exchange, the high-temperature and high-pressure refrigerant flowing through the first flow channel 53 will no longer release heat in the first flow channel 53, but will directly flow into the indoor heat exchanger 2 for heat release.

[0103] When the air conditioning system is in cooling mode, Figure 8 As shown, the working state of the air-conditioning system is: the outlet end 11 of the compressor 1 outputs high-temperature and high-pressure refrigerant, and the high-temperature and high-pressure refrigerant enters the outdoor heat exchanger 3 through the first flow channel 53, the B port, the C port, the E port, the G port, and the second end 32 of the outdoor heat exchanger 3 to release heat, and the high-temperature and high-pressure refrigerant becomes a low-temperature and high-pressure refrigerant, and the low-temperature and high-pressure refrigerant passes through the first end 31 of the outdoor heat exchanger 3 and the second end 42 of the throttle valve 4 to enter the throttle valve 4 for pressure reduction, and the low-temperature and high-pressure refrigerant becomes a low-temperature and low-pressure refrigerant, and the low-temperature and low-pressure refrigerant passes through the first end 41 of the throttle valve 4 and the first end 21 of the indoor heat exchanger 2 to enter the indoor heat exchanger 2 for heat absorption, thereby cooling the room, and the low-temperature and low-pressure refrigerant becomes a high-temperature and low-pressure refrigerant, and the high-temperature and low-pressure refrigerant passes through the second end 22 of the indoor heat exchanger 2, the A port, the D port, and the inlet end 12 of the compressor 1 into the compressor for compression, thereby obtaining a high-temperature and high-pressure refrigerant, and the high-temperature and high-pressure refrigerant flows out from the outlet end 11 of the compressor 1, thereby realizing circulation.

[0104] In the above process, since the air-conditioning system is in the cooling mode, the first heating device 5 is not required to further heat the high-temperature and high-pressure refrigerant flowing out of the outlet port 11 of the compressor 1. Therefore, the E port is connected to the G port by controlling the second control valve 7, thereby bypassing the second flow channel 54 of the first heating device 5, so that the refrigerant no longer needs to enter the second flow channel 54.

[0105] It is understandable that, since the refrigerant no longer flows into the second flow channel 54 for heat exchange, the high-temperature and high-pressure refrigerant flowing through the first flow channel 53 will no longer release heat in the first flow channel 53 .

[0106] The disclosed embodiment provides an air-conditioning system. When the air-conditioning system is in a heating mode and the outdoor temperature is within a preset temperature range, it means that the outdoor heat exchanger 3 is in a low-temperature and frosty environment. At this time, the controller can control the A port of the first control valve 6 to be connected to the B port, the C port to be connected to the D port, and control the E port of the second control valve 7 to be connected to the F port, so that the low-temperature and low-pressure refrigerant can first absorb a part of the heat in the outdoor heat exchanger 3, and then flow into the first heating device 5 to absorb a part of the heat. In this way, the first heating device 5 can share a part of the heat exchange burden for the outdoor heat exchanger 3, reduce the heat exchange degree of the outdoor heat exchanger 3, thereby delaying the frosting time of the outdoor heat exchanger 3, and then reduce the frequency of reverse defrosting, thereby increasing the heating efficiency of the air-conditioning system in the heating mode.

[0107] In the embodiment of the present disclosure, the air conditioning system may further include a second heating device 8, such as Fig. 9 As shown, the first end 81 of the second heating device 8 is communicated with the second end 32 and the G port of the outdoor heat exchanger 3 , and the second end 82 of the second heating device 8 is communicated with the first end 51 of the first heating device 5 .

[0108] When the air conditioning system is in heating mode and the outdoor temperature is within the preset temperature range, Fig.10 The working state of the air-conditioning system is as follows: the outlet end 11 of the compressor 1 outputs high-temperature and high-pressure refrigerant, the high-temperature and high-pressure refrigerant enters the indoor heat exchanger 2 through the B port, the A port, and the second end 22 of the indoor heat exchanger 2 to release heat, thereby heating the indoor space, the high-temperature and high-pressure refrigerant becomes low-temperature and high-pressure refrigerant, the low-temperature and high-pressure refrigerant passes through the first end 21 of the indoor heat exchanger 2 and the first end 41 of the throttle valve 4 and enters the throttle valve 4 to reduce the pressure, the low-temperature and high-pressure refrigerant becomes low-temperature and low-pressure refrigerant, the low-temperature and low-pressure refrigerant passes through the second end 42 of the throttle valve 4 and the first end 31 of the outdoor heat exchanger 3 and enters the outdoor heat exchanger 3 to absorb heat, and the low-temperature and low-pressure refrigerant becomes The high-temperature and low-pressure refrigerant passes through the second end 32 of the outdoor heat exchanger 3 and the first end 81 of the second heating device 8 to enter the second heating device 8 for a second heat absorption. After the second heat absorption, the refrigerant passes through the second end 82 of the second heating device 8 and the first end 51 of the first heating device 5 to enter the first heating device 5 for a third heat absorption. After the third heat absorption, the refrigerant passes through the second end 52 of the first heating device 5, the F port, the E port, the C port, the D port, and the inlet end 12 of the compressor 1 to enter the compressor 1 for compression, thereby obtaining a high-temperature and high-pressure refrigerant. The high-temperature and high-pressure refrigerant flows out from the outlet end 11 of the compressor 1, thereby realizing circulation.

[0109] In the above process, the controller realizes the heating mode of the air-conditioning system by controlling the first control valve 6 and the second control valve 7, and connects the second heating device 8 and the first heating device 5 between the second end 32 of the outdoor heat exchanger 3 and the inlet end 12 of the compressor 1, so that the second heating device 8 and the first heating device 5 can share part of the heat exchange burden for the outdoor heat exchanger 3, further reducing the heat exchange degree of the outdoor heat exchanger 3, thereby delaying the frosting time of the outdoor heat exchanger 3, and then reducing the frequency of reverse defrosting, thereby increasing the heating efficiency of the air-conditioning system in the heating mode.

[0110] When the air conditioning system is in heating mode and the outdoor temperature is outside the preset temperature range, Fig.11The working state of the air-conditioning system is as follows: the outlet end 11 of the compressor 1 outputs high-temperature and high-pressure refrigerant, and the high-temperature and high-pressure refrigerant enters the indoor heat exchanger 2 through the B port, the A port, and the second end 22 of the indoor heat exchanger 2 to release heat, thereby heating the indoor space, and the high-temperature and high-pressure refrigerant becomes a low-temperature and high-pressure refrigerant, and the low-temperature and high-pressure refrigerant passes through the first end 21 of the indoor heat exchanger 2 and the first end 41 of the throttle valve 4 to enter the throttle valve 4 for pressure reduction, and the low-temperature and high-pressure refrigerant becomes a low-temperature and low-pressure refrigerant, and the low-temperature and low-pressure refrigerant passes through the second end 42 of the throttle valve 4 and the first end 31 of the outdoor heat exchanger 3 to enter the outdoor heat exchanger 3 for heat absorption, and the low-temperature and low-pressure refrigerant becomes a high-temperature and low-pressure refrigerant, and the high-temperature and low-pressure refrigerant passes through the second end 32 of the outdoor heat exchanger 3, the G port, the E port, the C port, the D port, and the inlet end 12 of the compressor 1 into the compressor 1 for compression, thereby obtaining a high-temperature and high-pressure refrigerant, and the high-temperature and high-pressure refrigerant flows out from the outlet end 11 of the compressor 1, thereby realizing circulation.

[0111] In the above process, the controller realizes the heating mode of the air-conditioning system by controlling the first control valve 6 and the second control valve 7. In addition, since the outdoor heat exchanger 3 is not easy to frost at this time and the refrigerant is sufficient to absorb sufficient heat in the outdoor heat exchanger 3, there is no need for the first heating device 5 and the second heating device 8 to share the heat exchange burden of the outdoor heat exchanger 3. At this time, the E port is connected to the G port by controlling the second control valve 7, so that the first heating device 5 and the second heating device 8 are bypassed, so that the refrigerant does not need to enter the first heating device 5 and the second heating device 8 for further heating, thereby improving the energy efficiency of the air-conditioning system.

[0112] When the air conditioning system is in cooling mode, Fig.12 As shown, the working state of the air-conditioning system is: the outlet end 11 of the compressor 1 outputs high-temperature and high-pressure refrigerant, and the high-temperature and high-pressure refrigerant enters the outdoor heat exchanger 3 through the B port, the C port, the E port, the G port, and the second end 32 of the outdoor heat exchanger 3 to release heat, and the high-temperature and high-pressure refrigerant becomes a low-temperature and high-pressure refrigerant, and the low-temperature and high-pressure refrigerant passes through the first end 31 of the outdoor heat exchanger 3 and the second end 42 of the throttle valve 4 to enter the throttle valve 4 for pressure reduction, and the low-temperature and high-pressure refrigerant becomes a low-temperature and low-pressure refrigerant, and the low-temperature and low-pressure refrigerant passes through the first end 41 of the throttle valve 4 and the first end 21 of the indoor heat exchanger 2 to enter the indoor heat exchanger 2 for heat absorption, thereby cooling the room, and the low-temperature and low-pressure refrigerant becomes a high-temperature and low-pressure refrigerant, and the high-temperature and low-pressure refrigerant passes through the second end 22 of the indoor heat exchanger 2, the A port, the D port, and the inlet end 12 of the compressor 1 into the compressor for compression, thereby obtaining a high-temperature and high-pressure refrigerant, and the high-temperature and high-pressure refrigerant flows out from the outlet end 11 of the compressor 1, thereby realizing circulation.

[0113] In the above process, the controller realizes the cooling mode of the air-conditioning system by controlling the first control valve 6 and the second control valve 7. Moreover, since the air-conditioning system is in the cooling mode at this time, there is no need for the first heating device 5 and the second heating device 8 to further heat the high-temperature and high-pressure refrigerant flowing out of the outlet port 11 of the compressor 1. Therefore, the E port and the G port are connected by controlling the second control valve 7, so that the first heating device 5 and the second heating device 8 are bypassed, so that the refrigerant no longer needs to enter the first heating device 5 and the second heating device 8.

[0114] In a possible implementation, the second heating device 8 in the embodiment of the present disclosure may be an electric heating device, so that the heating efficiency of the second heating device 8 can be improved, thereby improving the heating efficiency of the air-conditioning system.

[0115] When the second heating device 8 is an electric heating device, the working state of the air conditioning system is the same as described above and will not be repeated here.

[0116] In the air-conditioning system provided in the embodiment of the present disclosure, the first heating device 5 and the second heating device 8 can both be electric heating devices, or the first heating device 5 can be a high-temperature heat exchanger and the second heating device 8 can be an electric heating device, and so on. They can be configured according to actual needs, and the embodiment of the present disclosure does not specifically limit this.

[0117] In another possible implementation, the second heating device 8 in the embodiment of the present disclosure may be a low-temperature regenerator. In the air-conditioning system provided in the embodiment of the present disclosure, both the first heating device 5 and the second heating device 8 may be regenerators, that is, the first heating device 5 is a high-temperature regenerator, and the second heating device 8 is a low-temperature regenerator, or the first heating device 5 is an electric heating device, and the second heating device 8 is a low-temperature regenerator, etc., which may be configured according to actual needs, and the embodiment of the present disclosure does not specifically limit this.

[0118] like Fig.13 As shown, Fig.13 The first heating device 5 in the air-conditioning system shown is a high-temperature regenerator, and the second heating device 8 is a low-temperature regenerator. Taking this as an example, the air-conditioning system when the second heating device 8 is a low-temperature regenerator is introduced.

[0119] The second heating device 8 has a third flow channel 83 and a fourth flow channel 84 which exchange heat with each other.

[0120] The first end 831 of the third flow channel 83 is connected to the first end 21 of the indoor heat exchanger 2, the second end 832 of the third flow channel 83 is connected to the first end 41 of the throttle valve 4, the first end of the fourth flow channel 84 is the first end 81 of the second heating device 8, that is, the first end of the fourth flow channel 84 is connected to the second end 32 of the outdoor heat exchanger 3, and the second end of the fourth flow channel 84 is the second end 82 of the second heating device 8, that is, the second end of the fourth flow channel 84 is connected to the first end 51 of the first heating device 5 (the first end of the second flow channel 54).

[0121] When the air conditioning system is in heating mode and the outdoor temperature is within the preset temperature range, Fig.14 As shown, the working state of the air-conditioning system is: the outlet end 11 of the compressor 1 outputs high-temperature and high-pressure refrigerant, the high-temperature and high-pressure refrigerant enters the first flow channel 53 through the second end 532 of the first flow channel 53 to release heat, the refrigerant after heat release passes through the first end 531 of the first flow channel 53, the B port, the A port, and the second end 22 of the indoor heat exchanger 2 to enter the indoor heat exchanger 2 to release heat, thereby heating the room, and the refrigerant becomes low-temperature and high-pressure refrigerant, the low-temperature and high-pressure refrigerant passes through the first end 21 of the indoor heat exchanger 2 and the first end 831 of the third flow channel 83 to enter the third flow channel 83 to release heat again, the refrigerant after heat release passes through the second end 832 of the third flow channel 83 and the first end 41 of the throttle valve 4 to enter the throttle valve 4 to reduce the pressure and become a low-temperature and low-pressure refrigerant, the low-temperature and low-pressure refrigerant passes through the second end 42 of the throttle valve 4 The first end 31 of the outdoor heat exchanger 3 enters the outdoor heat exchanger 3 for the first heat absorption, and the low-temperature and low-pressure refrigerant becomes a high-temperature and low-pressure refrigerant. The high-temperature and low-pressure refrigerant passes through the second end 32 of the outdoor heat exchanger 3 and the first end of the fourth flow channel 84 to enter the fourth flow channel 84 for the second heat absorption, that is, absorbing the heat released by the third flow channel 83. The refrigerant after the second heat absorption passes through the second end of the fourth flow channel 84 and the first end of the second flow channel 54 to enter the second flow channel 54 for the third heat absorption, that is, absorbing the heat released by the first flow channel 53. The refrigerant after heat absorption passes through the second end of the second flow channel 54, the F port, the E port, the C port, the D port, and the inlet end 12 of the compressor 1 and enters the compressor 1 for compression, thereby obtaining a high-temperature and high-pressure refrigerant. The high-temperature and high-pressure refrigerant flows out from the outlet end 11 of the compressor 1, thereby realizing circulation.

[0122] In the above process, after the refrigerant absorbs heat in the outdoor heat exchanger 3, it will also perform low-temperature heat exchange in the second heating device 8, and then perform high-temperature heat exchange in the first heating device 5. In this way, the first heating device 5 and the second heating device 8 both share a large part of the heat exchange burden with the outdoor heat exchanger 3, which greatly reduces the heat exchange degree of the outdoor heat exchanger 3, thereby delaying the frosting time of the outdoor heat exchanger 3, thereby reducing the frequency of reverse defrosting, and increasing the heating efficiency of the air-conditioning system in the heating mode.

[0123] Furthermore, although the refrigerant releases heat in the first flow channel 53 and the third flow channel 83, the controller can control the superheat of the inlet end 12 of the compressor 1 to be within a preset superheat range by adjusting the opening of the throttle valve 4, and can increase the flow rate of the high-temperature and high-pressure refrigerant flowing out of the outlet end 11 of the compressor 1. In this way, it is ensured that the refrigerant can release heat in the first flow channel 53, the indoor heat exchanger 2 and the third flow channel 83, and the first heating device 5, the indoor heat exchanger 2 and the second heating device 8 can all work at normal working efficiency.

[0124] When the air conditioning system is in heating mode and the outdoor temperature is outside the preset temperature range, Fig.15 As shown, the working state of the air conditioning system is: the outlet end 11 of the compressor 1 outputs high-temperature and high-pressure refrigerant, the high-temperature and high-pressure refrigerant passes through the first flow channel 53, the B port, the A port, and the second end 22 of the indoor heat exchanger 2 to enter the indoor heat exchanger 2 to release heat, thereby heating the room, and the high-temperature and high-pressure refrigerant becomes low-temperature and high-pressure refrigerant, the low-temperature and high-pressure refrigerant passes through the first end 21 of the indoor heat exchanger 2, the third flow channel 83, and the first end 41 of the throttle valve 4 to enter the throttle valve 4 to reduce the pressure, and the low-temperature and high-pressure refrigerant becomes The low-temperature and low-pressure refrigerant passes through the second end 42 of the throttle valve 4 and the first end 31 of the outdoor heat exchanger 3 to enter the outdoor heat exchanger 3 to absorb heat, and the low-temperature and low-pressure refrigerant becomes a high-temperature and low-pressure refrigerant. The high-temperature and low-pressure refrigerant passes through the second end 32 of the outdoor heat exchanger 3, the G port, the E port, the C port, the D port, and the inlet end 12 of the compressor 1 and enters the compressor 1 for compression, thereby obtaining a high-temperature and high-pressure refrigerant. The high-temperature and high-pressure refrigerant flows out from the outlet end 11 of the compressor 1, thereby realizing circulation.

[0125] In the above process, since the outdoor heat exchanger 3 is not easy to frost and the refrigerant can absorb enough heat in the outdoor heat exchanger 3, there is no need for the first heating device 5 and the second heating device 8 to share the heat exchange burden of the outdoor heat exchanger 3. At this time, the E port is connected to the G port by controlling the second control valve 7, so that the second flow channel 54 of the first heating device 5 and the fourth flow channel 84 of the second heating device 8 are bypassed, so that the refrigerant does not need to enter the second flow channel 54 and the fourth flow channel 84 for further heat absorption, thereby improving the energy efficiency of the air-conditioning system.

[0126] It is understandable that, since the refrigerant no longer flows into the second flow channel 54 and the fourth flow channel 84 for heat exchange, the refrigerant flowing through the first flow channel 53 and the third flow channel 83 will no longer release heat, but will directly flow into the indoor heat exchanger 2 for heat release.

[0127] When the air conditioning system is in cooling mode, Fig.16As shown, the working state of the air-conditioning system is: the outlet end 11 of the compressor 1 outputs high-temperature and high-pressure refrigerant, the high-temperature and high-pressure refrigerant passes through the first flow channel 53, the B port, the C port, the E port, the G port, and the second end 32 of the outdoor heat exchanger 3 to enter the outdoor heat exchanger 3 to release heat, and the high-temperature and high-pressure refrigerant becomes a low-temperature and high-pressure refrigerant, the low-temperature and high-pressure refrigerant passes through the first end 31 of the outdoor heat exchanger 3 and the second end 42 of the throttle valve 4 to enter the throttle valve 4 to reduce the pressure, and the low-temperature and high-pressure refrigerant becomes a low-temperature and low-pressure refrigerant. The low-temperature and low-pressure refrigerant passes through the first end 41 of the throttle valve 4, the third flow channel 83, and the first end 21 of the indoor heat exchanger 2, and enters the indoor heat exchanger 2 to absorb heat, thereby cooling the indoor room. The low-temperature and low-pressure refrigerant becomes a high-temperature and low-pressure refrigerant. The high-temperature and low-pressure refrigerant passes through the second end 22 of the indoor heat exchanger 2, the A port, the D port, and the inlet end 12 of the compressor 1, and enters the compressor for compression, thereby obtaining a high-temperature and high-pressure refrigerant. The high-temperature and high-pressure refrigerant flows out from the outlet end 11 of the compressor 1, thereby realizing circulation.

[0128] In the above process, the controller realizes the cooling mode of the air-conditioning system by controlling the first control valve 6 and the second control valve 7. Moreover, since the air-conditioning system is in the cooling mode at this time, there is no need for the first heating device 5 and the second heating device 8 to further heat the high-temperature and high-pressure refrigerant flowing out of the outlet port 11 of the compressor 1. Therefore, the E port is connected to the G port by controlling the second control valve 7, so that the second flow channel 54 and the fourth flow channel 84 are bypassed, so that the refrigerant no longer needs to enter the first heating device 5 and the second heating device 8.

[0129] It is understandable that, since the refrigerant no longer flows into the second flow channel 54 and the fourth flow channel 84 for heat exchange, the refrigerant flowing through the first flow channel 53 and the third flow channel 83 will not release heat.

[0130] The disclosed embodiment provides an air-conditioning system. When the air-conditioning system is in a heating mode and the outdoor temperature is within a preset temperature range, it means that the outdoor heat exchanger 3 is in a low-temperature and frosty environment. At this time, the controller can control the A port of the first control valve 6 to be connected to the B port, the C port to be connected to the D port, and control the E port of the second control valve 7 to be connected to the F port, so that the low-temperature and low-pressure refrigerant can first absorb a part of the heat in the outdoor heat exchanger 3, and then flow into the second heating device 8 to absorb a part of the heat again, and then flow into the first heating device 5 to absorb a part of the heat. In this way, the second heating device 8 and the first heating device 5 can both share a part of the heat exchange burden for the outdoor heat exchanger 3, further reduce the heat exchange degree of the outdoor heat exchanger 3, thereby delaying the frosting time of the outdoor heat exchanger 3, and then reduce the frequency of reverse defrosting, thereby increasing the heating efficiency of the air-conditioning system in the heating mode.

[0131] In the embodiment of the present disclosure, the air conditioning system may further include a third heating device 9, such as Fig.17 As shown, the first end 91 of the third heating device 9 is connected to the second end 32 of the outdoor heat exchanger 3 , and the second end 92 of the third heating device 9 is connected to the first end 51 and the G port of the first heating device 5 .

[0132] When the air conditioning system is in heating mode and the outdoor temperature is within the preset temperature range, Fig.18 The working state of the air-conditioning system is as follows: the outlet end 11 of the compressor 1 outputs high-temperature and high-pressure refrigerant, the high-temperature and high-pressure refrigerant enters the indoor heat exchanger 2 through the B port, the A port, and the second end 22 of the indoor heat exchanger 2 to release heat, thereby heating the indoor space, the high-temperature and high-pressure refrigerant becomes low-temperature and high-pressure refrigerant, the low-temperature and high-pressure refrigerant passes through the first end 21 of the indoor heat exchanger 2 and the first end 41 of the throttle valve 4 and enters the throttle valve 4 to reduce the pressure, the low-temperature and high-pressure refrigerant becomes low-temperature and low-pressure refrigerant, the low-temperature and low-pressure refrigerant passes through the second end 42 of the throttle valve 4 and the first end 31 of the outdoor heat exchanger 3 and enters the outdoor heat exchanger 3 to absorb heat, and the low-temperature and low-pressure refrigerant becomes The high-temperature and low-pressure refrigerant passes through the second end 32 of the outdoor heat exchanger 3 and the first end 91 of the third heating device 9 to enter the third heating device 9 for a second heat absorption. After the second heat absorption, the refrigerant passes through the second end 92 of the third heating device 9 and the first end 51 of the first heating device 5 to enter the first heating device 5 for a third heat absorption. After the third heat absorption, the refrigerant passes through the second end 52 of the first heating device 5, the F port, the E port, the C port, the D port, and the inlet end 12 of the compressor 1 to enter the compressor 1 for compression, thereby obtaining a high-temperature and high-pressure refrigerant. The high-temperature and high-pressure refrigerant flows out from the outlet end 11 of the compressor 1, thereby realizing circulation.

[0133] In the above process, the controller realizes the heating mode of the air-conditioning system by controlling the first control valve 6 and the second control valve 7, and connects the third heating device 9 and the first heating device 5 between the second end 32 of the outdoor heat exchanger 3 and the inlet end 12 of the compressor 1, so that the third heating device 9 and the first heating device 5 can share part of the heat exchange burden for the outdoor heat exchanger 3, further reducing the heat exchange degree of the outdoor heat exchanger 3, thereby delaying the frosting time of the outdoor heat exchanger 3, and then reducing the frequency of reverse defrosting, thereby increasing the heating efficiency of the air-conditioning system in the heating mode.

[0134] When the air conditioning system is in heating mode and the outdoor temperature is outside the preset temperature range, Fig.19The working state of the air conditioning system is as follows: the outlet end 11 of the compressor 1 outputs high-temperature and high-pressure refrigerant, the high-temperature and high-pressure refrigerant enters the indoor heat exchanger 2 through the B port, the A port, and the second end 22 of the indoor heat exchanger 2 to release heat, thereby heating the room, the high-temperature and high-pressure refrigerant becomes low-temperature and high-pressure refrigerant, the low-temperature and high-pressure refrigerant passes through the first end 21 of the indoor heat exchanger 2 and the first end 41 of the throttle valve 4 and enters the throttle valve 4 to reduce the pressure, the low-temperature and high-pressure refrigerant becomes low-temperature and low-pressure refrigerant, the low-temperature and low-pressure refrigerant passes through the second end 42 of the throttle valve 4 and the outdoor heat exchanger 3 The first end 31 enters the outdoor heat exchanger 3 to absorb heat, and the low-temperature and low-pressure refrigerant becomes a high-temperature and low-pressure refrigerant. The high-temperature and low-pressure refrigerant passes through the second end 32 of the outdoor heat exchanger 3 and the first end 91 of the third heating device 9 to enter the third heating device 9 for a second heat absorption. The refrigerant after the second heat absorption passes through the second end 92 of the third heating device 9, the G port, the E port, the C port, the D port, and the inlet end 12 of the compressor 1 and enters the compressor 1 for compression, thereby obtaining a high-temperature and high-pressure refrigerant. The high-temperature and high-pressure refrigerant flows out from the outlet end 11 of the compressor 1, thereby realizing circulation.

[0135] In the above process, the controller realizes the heating mode of the air-conditioning system by controlling the first control valve 6 and the second control valve 7. Moreover, since the frost time of the outdoor heat exchanger 3 is relatively slow, the second control valve 7 can be controlled to connect the E port and the G port, thereby bypassing the first heating device 5 and leaving only the third heating device 9, so that the refrigerant does not enter the first heating device 5 for the third heating, thereby improving the energy efficiency of the air-conditioning system.

[0136] When the air conditioning system is in cooling mode, Fig. 20 As shown, the working state of the air conditioning system is: the outlet end 11 of the compressor 1 outputs high-temperature and high-pressure refrigerant, the high-temperature and high-pressure refrigerant passes through the B port, the C port, the E port, the G port, and the second end 92 of the third heating device 9 to enter the third heating device 9 for heating, the heated refrigerant passes through the first end 91 of the third heating device 9 and the second end 32 of the outdoor heat exchanger 3 to enter the outdoor heat exchanger 3 to release heat, the high-temperature and high-pressure refrigerant becomes low-temperature and high-pressure refrigerant, the low-temperature and high-pressure refrigerant passes through the first end 31 of the outdoor heat exchanger 3 and the second end 42 of the throttle valve 4 to enter the throttle valve 4, and the high-temperature and high-pressure refrigerant is heated. The pressure is reduced in valve 4, and the low-temperature and high-pressure refrigerant becomes a low-temperature and low-pressure refrigerant. The low-temperature and low-pressure refrigerant passes through the first end 41 of the throttle valve 4 and the first end 21 of the indoor heat exchanger 2 to enter the indoor heat exchanger 2 to absorb heat, thereby cooling the room. The low-temperature and low-pressure refrigerant becomes a high-temperature and low-pressure refrigerant. The high-temperature and low-pressure refrigerant passes through the second end 22 of the indoor heat exchanger 2, the A port, the D port, and the inlet end 12 of the compressor 1 and enters the compressor for compression, thereby obtaining a high-temperature and high-pressure refrigerant. The high-temperature and high-pressure refrigerant flows out from the outlet end 11 of the compressor 1, thereby realizing circulation.

[0137] In the above process, the controller realizes the cooling mode of the air-conditioning system by controlling the first control valve 6 and the second control valve 7, and the high-temperature and high-pressure refrigerant output by the compressor 1 is further heated by the third heating device 9, and then enters the outdoor heat exchanger 3 to release heat, thereby improving the heat exchange efficiency of the refrigerant in the outdoor heat exchanger 3, thereby improving the cooling efficiency of the air-conditioning system.

[0138] In a possible implementation, the third heating device 9 may be an electric heating device. Of course, it may also be other reasonable heating devices, which is not specifically limited in the embodiment of the present disclosure.

[0139] The air conditioning system provided with the third heating device 9 is more suitable for an environment where the outdoor heat exchanger 3 will frost in the outdoor environment but the frost formation is relatively slow. In this environment, the heating degree of the third heating device 9 can be set to be less than the heating degree of the first heating device 5. In this way, when the air conditioning system is in the heating mode and the outdoor temperature is within the preset temperature range (the outdoor heat exchanger 3 is located in an environment where the frost formation is relatively fast), the first heating device 5 and the third heating device 9 can be used together to share the heat exchange burden for the outdoor heat exchanger 3. When the air conditioning system is in the heating mode and the outdoor temperature is outside the preset temperature range (the outdoor heat exchanger 3 is located in an environment where the frost formation is relatively slow), the heat exchange burden for the outdoor heat exchanger 3 can be shared only by the third heating device 9.

[0140] In the embodiment of the present disclosure, the air conditioning system may further include a heat exchange device 10, such as Fig.21 As shown, the heat exchange device 10 has a fifth flow channel 101 and a sixth flow channel 102 for exchanging heat with each other.

[0141] The first end 1011 of the fifth flow channel 101 is connected to the first end 21 of the indoor heat exchanger 2, the second end 1012 of the fifth flow channel 101 is connected to the first end 41 of the throttle valve 4, and the second end 1022 of the sixth flow channel 102 is connected to the first end 51 and the G port of the first heating device 5.

[0142] When the air conditioning system is in heating mode and the outdoor temperature is within the preset temperature range, Fig. 22The working state of the air-conditioning system is as follows: the outlet end 11 of the compressor 1 outputs high-temperature and high-pressure refrigerant, the high-temperature and high-pressure refrigerant enters the first flow channel 53 through the second end 532 of the first flow channel 53 to release heat, the refrigerant after release heat passes through the first end 531 of the first flow channel 53, the B port, the A port, and the second end 22 of the indoor heat exchanger 2 to enter the indoor heat exchanger 2 to release heat, thereby heating the room, and the refrigerant becomes low-temperature and high-pressure refrigerant, the low-temperature and high-pressure refrigerant passes through the first end 21 of the indoor heat exchanger 2 and the first end 1011 of the fifth flow channel 101 to the fifth flow channel 101 to release heat again, the refrigerant after release heat passes through the second end 1012 of the fifth flow channel 101 and the first end 41 of the throttle valve 4 to enter the throttle valve 4 for pressure reduction, and becomes low-temperature and low-pressure refrigerant, the low-temperature and low-pressure refrigerant passes through the second end 42 of the throttle valve 4, the outdoor heat exchanger 2, and the outdoor heat exchanger 2. The first end 31 of the heat exchanger 3 enters the outdoor heat exchanger 3 for the first heat absorption, and the low-temperature and low-pressure refrigerant becomes a high-temperature and low-pressure refrigerant. The high-temperature and low-pressure refrigerant passes through the second end 32 of the outdoor heat exchanger 3 and the first end 1021 of the sixth flow channel 102 to enter the sixth flow channel 102 for the second heat absorption, that is, absorbing the heat released by the fifth flow channel 101. The refrigerant after the second heat absorption passes through the second end 1022 of the sixth flow channel 102 and the first end of the second flow channel 54 to enter the second flow channel 54 for the third heat absorption, that is, absorbing the heat released by the first flow channel 53. The refrigerant after heat absorption passes through the second end of the second flow channel 54, the F port, the E port, the C port, the D port, and the inlet end 12 of the compressor 1 into the compressor 1 for compression, thereby obtaining a high-temperature and high-pressure refrigerant. The high-temperature and high-pressure refrigerant flows out from the outlet end 11 of the compressor 1, thereby realizing circulation.

[0143] In the above process, after the refrigerant absorbs heat in the outdoor heat exchanger 3, it will undergo low-temperature heat exchange in the heat exchange device 10, and then undergo high-temperature heat exchange in the first heating device 5. In this way, the first heating device 5 and the heat exchange device 10 both share a large part of the heat exchange burden for the outdoor heat exchanger 3, greatly reducing the heat exchange degree of the outdoor heat exchanger 3, thereby delaying the frosting time of the outdoor heat exchanger 3, and further reducing the frequency of reverse defrosting, thereby increasing the heating efficiency of the air-conditioning system in the heating mode.

[0144] Furthermore, although the refrigerant releases heat in the first flow channel 53 and the fifth flow channel 101, the controller can control the superheat of the inlet end 12 of the compressor 1 to be within a preset superheat range by adjusting the opening of the throttle valve 4, and can increase the flow rate of the high-temperature and high-pressure refrigerant flowing out of the outlet end 11 of the compressor 1. In this way, it is ensured that the refrigerant can release heat in the first flow channel 53, the indoor heat exchanger 2 and the fifth flow channel 101, and the first heating device 5, the indoor heat exchanger 2 and the heat exchange device 10 can all operate at normal working efficiency.

[0145] When the air conditioning system is in heating mode and the outdoor temperature is outside the preset temperature range, Fig.23 As shown, the working state of the air-conditioning system is: the outlet end 11 of the compressor 1 outputs high-temperature and high-pressure refrigerant, and the high-temperature and high-pressure refrigerant passes through the first flow channel 53, the B port, the A port, and the second end 22 of the indoor heat exchanger 2 to enter the indoor heat exchanger 2 to release heat, thereby heating the room, and the high-temperature and high-pressure refrigerant becomes low-temperature and high-pressure refrigerant, and the low-temperature and high-pressure refrigerant passes through the first end 21 of the indoor heat exchanger 2 and the first end 1011 of the fifth flow channel 101 to enter the fifth flow channel 101 to release heat, and the refrigerant after heat release passes through the second end 1012 of the fifth flow channel 101 and the first end 41 of the throttle valve 4 to enter the throttle valve 4 to reduce the pressure, and the low-temperature and high-pressure refrigerant becomes low-temperature and low-pressure refrigerant. The low-temperature and low-pressure refrigerant passes through the second end 42 of the throttle valve 4 and the first end 31 of the outdoor heat exchanger 3 to enter the outdoor heat exchanger 3 to absorb heat, and the low-temperature and low-pressure refrigerant becomes a high-temperature and low-pressure refrigerant. The high-temperature and low-pressure refrigerant passes through the second end 32 of the outdoor heat exchanger 3 and the first end 1021 of the sixth flow channel 102 to enter the sixth flow channel 102 to absorb the heat released by the fifth flow channel 101. The refrigerant after absorbing heat passes through the second end 1022 of the sixth flow channel 102, the G port, the E port, the C port, the D port, and the inlet end 12 of the compressor 1 and enters the compressor 1 for compression, thereby obtaining a high-temperature and high-pressure refrigerant, and the high-temperature and high-pressure refrigerant flows out from the outlet end 11 of the compressor 1, thereby realizing circulation.

[0146] In the above process, the controller realizes the heating mode of the air-conditioning system by controlling the first control valve 6 and the second control valve 7. Moreover, since the frost time of the outdoor heat exchanger 3 is relatively slow, the second control valve 7 can be controlled to connect the E port and the G port, thereby bypassing the second flow channel 54 and leaving only the heat exchange device 10, so that the refrigerant does not enter the first heating device 5 for the third heating, thereby improving the energy efficiency of the air-conditioning system.

[0147] It is understandable that, since the refrigerant no longer flows into the second flow channel 54 for heat exchange, the refrigerant flowing through the first flow channel 53 will no longer exchange heat.

[0148] When the air conditioning system is in cooling mode, Fig.24As shown, the working state of the air-conditioning system is: the outlet end 11 of the compressor 1 outputs high-temperature and high-pressure refrigerant, the high-temperature and high-pressure refrigerant passes through the first flow channel 53, the B port, the C port, the E port, the G port, and the second end 1022 of the sixth flow channel 102 to enter the sixth flow channel 102 for heat release, the refrigerant after heat release passes through the first end 1021 of the sixth flow channel 102 and the second end 32 of the outdoor heat exchanger 3 to enter the outdoor heat exchanger 3 for heat release, and the refrigerant becomes low-temperature and high-pressure refrigerant, the low-temperature and high-pressure refrigerant passes through the first end 31 of the outdoor heat exchanger 3 and the second end 42 of the throttle valve 4 to enter the throttle valve 4 for pressure reduction, and the low-temperature and high-pressure refrigerant becomes low-temperature and low-pressure The refrigerant, the low-temperature and low-pressure refrigerant passes through the first end 41 of the throttle valve 4 and the second end 1012 of the fifth flow channel 101 to enter the fifth flow channel 101 to absorb heat. The refrigerant after absorbing heat passes through the first end 1011 of the fifth flow channel 101 and the first end 21 of the indoor heat exchanger 2 to enter the indoor heat exchanger 2 to absorb heat, thereby cooling the indoor room. The refrigerant becomes a high-temperature and low-pressure refrigerant. The high-temperature and low-pressure refrigerant passes through the second end 22 of the indoor heat exchanger 2, the A port, the D port, and the inlet end 12 of the compressor 1 and enters the compressor for compression, thereby obtaining a high-temperature and high-pressure refrigerant. The high-temperature and high-pressure refrigerant flows out from the outlet end 11 of the compressor 1, thereby realizing circulation.

[0149] In the above process, the controller realizes the cooling mode of the air-conditioning system by controlling the first control valve 6 and the second control valve 7 .

[0150] Although the air-conditioning system equipped with the heat exchange device 10 reduces the cooling efficiency to a certain extent when in the cooling mode, overall, its heating efficiency is higher in the heating mode, and the frosting time is delayed, the frequency of reverse defrosting is reduced, and the heating efficiency of the air-conditioning system in the heating mode is increased.

[0151] like Fig.25 As shown, the experiment proves that in the heating mode of 21 degrees Celsius, Fig.21 The air conditioning system of the present disclosure shown can extend the continuous heating time from 50 minutes in the related art to 85 minutes, significantly extending the heating time and improving the comprehensive energy efficiency COP by more than 5%.

[0152] The above description is only an optional embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. An air conditioning system, characterized in that: The air conditioning system comprises a compressor (1), an indoor heat exchanger (2), an outdoor heat exchanger (3), a throttle valve (4), a first heating device (5), a first control valve (6), a second control valve (7), a temperature sensor and a controller; The first end (41) of the throttle valve (4) is in communication with the first end (21) of the indoor heat exchanger (2), and the second end (42) of the throttle valve (4) is in communication with the first end (31) of the outdoor heat exchanger (3); The first end (51) of the first heating device (5) is in communication with the second end (32) of the outdoor heat exchanger (3); The first control valve (6) has an A port, a B port, a C port and a D port, the A port being in communication with the second end (22) of the indoor heat exchanger (2), the B port being in communication with the outlet end (11) of the compressor (1), and the D port being in communication with the inlet end (12) of the compressor (1); The second control valve (7) has an E port, an F port and a G port, the E port is in communication with the C port, the F port is in communication with the second end (52) of the first heating device (5), and the G port is in communication with the second end (32) of the outdoor heat exchanger (3); The temperature sensor is used to detect the outdoor temperature; The controller is used to control the A port to be connected to the B port, control the C port to be connected to the D port, and control the E port to be connected to the F port when the air conditioning system is in heating mode and the outdoor temperature is within a preset temperature range.

2. The air conditioning system according to claim 1, characterized in that: The controller is also used to control the opening of the throttle valve (4) so ​​that the superheat at the inlet end (12) of the compressor (1) is within a preset superheat range.

3. The air conditioning system according to claim 1, characterized in that: The controller is also used to control the A port to be connected to the B port, control the C port to be connected to the D port, and control the E port to be connected to the G port when the air conditioning system is in heating mode and the outdoor temperature is outside the preset temperature range.

4. The air conditioning system according to claim 1, characterized in that: The controller is also used to control the A port to be connected to the D port, control the B port to be connected to the C port, and control the E port to be connected to the G port when the air conditioning system is in a cooling mode.

5. The air conditioning system according to claim 1, characterized in that: The first heating device (5) is an electric heating device; or, The first heating device (5) is a high-temperature regenerator, and the first heating device (5) has a first flow channel (53) and a second flow channel (54), the first end (531) of the first flow channel (53) is connected to the B port, the second end (532) of the first flow channel (53) is connected to the outlet end (11) of the compressor (1), the first end of the second flow channel (54) is the first end (51) of the first heating device (5), and the second end of the second flow channel (54) is the second end (52) of the first heating device (5).

6. The air conditioning system according to any one of claims 1 to 5, characterized in that: The air conditioning system further comprises a second heating device (8), wherein a first end (81) of the second heating device (8) is connected to a second end (32) of the outdoor heat exchanger (3) and the G port, and a second end (82) of the second heating device (8) is connected to a first end (51) of the first heating device (5).

7. The air conditioning system according to claim 6, characterized in that: The second heating device (8) is an electric heating device.

8. The air conditioning system according to claim 6, characterized in that: The second heating device (8) is a low-temperature regenerator, and the second heating device (8) has a third flow channel (83) and a fourth flow channel (84). The first end (831) of the third flow channel (83) is connected to the first end (21) of the indoor heat exchanger (2), the second end (832) of the third flow channel (83) is connected to the first end (41) of the throttle valve (4), the first end of the fourth flow channel (84) is the first end (81) of the second heating device (8), and the second end of the fourth flow channel (84) is the second end (82) of the second heating device (8).

9. The air conditioning system according to any one of claims 1 to 5, characterized in that: The air conditioning system further comprises a third heating device (9), wherein a first end (91) of the third heating device (9) is connected to a second end (32) of the outdoor heat exchanger (3), and a second end (92) of the third heating device (9) is connected to a first end (51) of the first heating device (5) and the G port.

10. The air conditioning system according to any one of claims 1 to 5, characterized in that: The air conditioning system further comprises a heat exchange device (10), the heat exchange device (10) comprising a fifth flow channel (101) and a sixth flow channel (102), the first end (1011) of the fifth flow channel (101) being in communication with the first end (21) of the indoor heat exchanger (2), the second end (1012) of the fifth flow channel (101) being in communication with the first end (41) of the throttle valve (4), the first end (1021) of the sixth flow channel (102) being in communication with the second end (32) of the outdoor heat exchanger (3), and the second end (1022) of the sixth flow channel (102) being in communication with the first end (51) of the first heating device (5) and the G port.

Images