Heat exchange device, outdoor unit, air conditioning system and control method, device and equipment thereof

Abstract

The present application relates to a heat exchange device, an outdoor unit, an air-conditioning system and a control method, device and equipment thereof, wherein the heat exchange device comprises: a first heat exchange component, a second heat exchange component, a first flow direction control unit, a second flow direction control unit and a fan; the first heat exchange component is arranged between the second heat exchange component and the fan; one end of the first heat exchange component and one end of the second heat exchange component are both connected to one end of the first throttling unit; the other end of the first heat exchange component is connected to the first end, and the second end is used to connect to the exhaust port of the compressor of the outdoor unit. Therefore, when the air-conditioning system is in defrost mode, the first flow direction control unit will be opened and the second flow direction control unit will be in the first flow state. The refrigerant coming out of the exhaust port is a high-temperature refrigerant. After directly passing through the first heat exchange component for heat exchange, the frost layer on the first heat exchange component is effectively removed. At the same time, the second heat exchange component participates in the heating cycle of the indoor unit, thereby achieving defrosting and participating in the heating cycle of the indoor unit.

Description

Technical Field

[0001] The present application relates to the field of air conditioning technology, and in particular to a heat exchange device, an outdoor unit, an air conditioning system, and a control method, device, and equipment thereof. Background Art

[0002] When the air conditioner is running in a low temperature environment, the outdoor heat exchanger may be frosted, resulting in a reduction in the air conditioner's heating capacity. At this time, the outdoor heat exchanger of the air conditioner needs to be defrosted.

[0003] At present, in the existing air conditioning control logic, there are generally two defrosting methods: refrigeration cycle defrosting and hot gas defrosting. Refrigeration cycle defrosting is to control the reversing of the four-way valve to switch the air conditioning system from the heating cycle to the refrigeration cycle. The outdoor heat exchanger will act as a condenser to condense the high-temperature refrigerant in the refrigeration cycle state, thereby using the high-temperature refrigerant to achieve defrosting; hot gas defrosting is to increase the opening of the expansion valve and reduce the throttling effect of the expansion valve, so that the high-temperature refrigerant enters the outdoor heat exchanger for defrosting. However, when the air conditioning system uses these two defrosting methods for defrosting, it cannot heat the room at the same time, causing the room temperature to drop, affecting the user's heating use. Summary of the invention

[0004] In order to overcome the problems existing in the related art at least to a certain extent, the present application provides a heat exchange device, an outdoor unit, an air-conditioning system and a control method, device and equipment thereof.

[0005] According to a first aspect of the present application, there is provided a heat exchange device, comprising: a first heat exchange component, a second heat exchange component, a first flow direction control unit, a second flow direction control unit, and a fan;

[0006] The first heat exchange component is disposed between the second heat exchange component and the fan, so that the fan blows air to the first heat exchange component and the second heat exchange component in sequence for heat exchange;

[0007] The second flow control unit includes a first end, a second end and a third end; one end of the first heat exchange component and one end of the second heat exchange component are both connected to one end of the first throttling unit; the other end of the first heat exchange component is connected to the first end, and the second end is used to connect to the exhaust port of the compressor of the outdoor unit, so that when the air-conditioning system in which the outdoor unit is located is in the defrost mode, the first flow control unit is controlled to be opened and the second flow control unit is in the first flow state, and after the refrigerant is discharged from the exhaust port of the compressor, a part of it flows out from the other end of the first throttling unit after passing through the second heat exchange component; the other part flows out from the other end of the first throttling unit after passing through the first heat exchange component; when the air-conditioning system in which the outdoor unit is located is in other modes except the defrost mode, the first flow control unit is controlled to be closed and the second flow control unit is in the second flow state, and the refrigerant flows in from the other end of the second heat exchange component, passes through the second heat exchange component and the first heat exchange component in sequence, and flows out from the third end.

[0008] Optionally, the second flow direction control unit includes a three-way valve, the three-way valve includes a first valve port, a second valve port and a third valve port, the first valve port is the first end, the second valve port is the second end, and the third valve port is the third end;

[0009] or,

[0010] The second flow direction control unit includes a first two-way valve and a second two-way valve; the first two-way valve includes a fourth valve port and a fifth valve port, and the second two-way valve includes a sixth valve port and a seventh valve port; the fourth valve port and the sixth valve port are the first end, the fifth valve port is the second end, and the seventh valve port is the third end.

[0011] Optionally, the first heat exchange component includes a first heat exchanger and a first throttling unit; the second heat exchange component includes a second heat exchanger.

[0012] Optionally, the first heat exchanger is a tube-fin heat exchanger or a microchannel heat exchanger; the second heat exchanger is a tube-fin heat exchanger or a microchannel heat exchanger.

[0013] Optionally, the first throttling unit is of a type of capillary tube throttling, throttling short tube throttling or electronic expansion valve throttling.

[0014] According to a second aspect of the present application, an outdoor unit is provided, comprising a second throttling unit, a reversing valve, a compressor and a heat exchange device as described in the first aspect of the present application;

[0015] The other end of the first heat exchange component in the heat exchange device is connected to one end of the second throttling unit;

[0016] The reversing valve includes an eighth valve port, a ninth valve port, a tenth valve port and an eleventh valve port; the eighth valve port is connected to the third end and the other end of the first flow direction control unit; the ninth valve port is connected to the air inlet of the compressor; the eleventh valve port is connected to the exhaust port of the compressor; the other end of the second throttling unit and the tenth valve port are used to connect to the indoor unit heat exchanger in the air-conditioning system where the outdoor unit is located.

[0017] Optionally, the type of the second throttling unit is capillary tube throttling, throttling short tube throttling or electronic expansion valve throttling.

[0018] According to a third aspect of the present application, there is provided an air conditioning system, comprising an indoor unit and an outdoor unit as described in the second aspect of the present application;

[0019] The indoor unit includes the indoor unit heat exchanger, one end of the indoor unit heat exchanger is connected to the other end of the second throttling unit, and the other end is connected to the tenth valve port.

[0020] Optionally, the indoor unit is provided with an electric auxiliary heating unit.

[0021] According to a fourth aspect of the present application, a control method for an air conditioning system is provided, which is applied to the air conditioning system as described in the third aspect of the present application, comprising:

[0022] Receiving an operation mode signal of the air conditioning system; the operation mode signal includes a defrost mode signal and other mode signals except the defrost mode;

[0023] When the operation mode signal is a defrost mode signal, the first flow control unit is controlled to be opened and the second flow control unit is controlled to be in a first flow state, so that the refrigerant flows into the heat exchange device from the other end of the second heat exchange component and the second end of the second flow control unit respectively, flows out from the other end of the first throttling unit, and flows into the air inlet of the compressor after passing through the reversing valve;

[0024] When the operation mode signal is a mode signal other than the defrost mode, the first flow direction control unit is controlled to be closed and the second flow direction control unit is in a second flow state, so that the refrigerant flows in from the other end of the second heat exchange component and flows out from the third end.

[0025] According to a fifth aspect of the present application, a control method for an air conditioning system is provided, which is applied to the air conditioning system according to the third aspect of the present application, comprising:

[0026] Receiving an operation mode signal of the air conditioning system; the operation mode signal includes a defrost mode signal and other mode signals except the defrost mode;

[0027] When the operation mode signal is a defrost mode signal, the first flow direction control unit is controlled to be opened, the second flow direction control unit is controlled to be in the first flow state, and the electric auxiliary heating unit is turned on, so that the refrigerant flows into the heat exchange device from the other end of the second heat exchange component and the second end of the second flow direction control unit respectively, flows out from the other end of the first throttling unit, and flows into the air inlet of the compressor after passing through the reversing valve;

[0028] When the operation mode signal is a mode signal other than the defrost mode, the first flow direction control unit is controlled to be closed and the second flow direction control unit is in a second flow state, so that the refrigerant flows in from the other end of the second heat exchange component and flows out from the third end.

[0029] According to a sixth aspect of the present application, there is provided a control device for an air conditioning system, comprising:

[0030] A first receiving module, configured to receive an operation mode signal of the air conditioning system; the operation mode signal includes a defrost mode signal and other mode signals except the defrost mode;

[0031] a first control module, for controlling the first flow control unit to be opened and the second flow control unit to be in a first flow state when the operation mode signal is a defrost mode signal, so that the refrigerant flows into the heat exchange device from the other end of the second heat exchange component and the second end of the second flow control unit, flows out from the other end of the first throttling unit, and flows into the air inlet of the compressor after passing through the reversing valve;

[0032] The second control module is used to control the first flow direction control unit to be closed and the second flow direction control unit to be in a second flow state when the operating mode signal is a mode signal other than the defrost mode, so that the refrigerant flows in from the other end of the second heat exchange component and flows out from the third end.

[0033] According to a seventh aspect of the present application, a control device for an air conditioning system is provided, comprising:

[0034] A second receiving module is used to receive an operation mode signal of the air conditioning system; the operation mode signal includes a defrost mode signal and other mode signals except the defrost mode;

[0035] a third control module, configured to control the first flow direction control unit to be turned on, the second flow direction control unit to be in a first flow state, and the electric auxiliary heating unit to be turned on when the operation mode signal is a defrost mode signal, so that the refrigerant flows into the heat exchange device from the other end of the second heat exchange component and the second end of the second flow direction control unit, flows out from the other end of the first throttling unit, and flows into the air inlet of the compressor after passing through the reversing valve;

[0036] The fourth control module is used to control the first flow direction control unit to be closed and the second flow direction control unit to be in a second flow state when the operating mode signal is a mode signal other than the defrost mode, so that the refrigerant flows in from the other end of the second heat exchange component and flows out from the third end.

[0037] According to an eighth aspect of the present application, there is provided a control device for an air conditioning system, comprising:

[0038] A processor, and a memory connected to the processor;

[0039] The memory is used to store a computer program, and the computer program is at least used to execute the control method of the air conditioning system according to the fourth aspect or the fifth aspect of the present application;

[0040] The processor is used to call and execute the computer program in the memory.

[0041] The technical solution provided by the present application may include the following beneficial effects: a first heat exchange component, a second heat exchange component, a first flow control unit, a second flow control unit, and a fan are provided in a heat exchange device of an outdoor unit, wherein the first heat exchange component is provided between the second heat exchange component and the fan; so that the fan blows air to the first heat exchange component and the second heat exchange component in sequence for heat exchange. In addition, since one end of the first heat exchange component and one end of the second heat exchange component are both connected to one end of the first throttling unit; the other end of the first heat exchange component is connected to the first end, and the second end is used to connect to the exhaust port of the compressor of the outdoor unit. Therefore, when the air-conditioning system is in a mode other than the defrost mode, such as the heating mode, the first flow control unit will be closed, the second flow control unit will be in the second flow state, and the refrigerant will flow from the second heat exchange component to the first heat exchange component. Based on this, the temperature of the refrigerant flowing into the first heat exchange component is lower than that of the refrigerant flowing into the second heat exchange component, and the fan blows the air from the first The heat exchange component blows to the second heat exchange component. The refrigerant temperature of the first heat exchange component is lower, and the air will be dehumidified first, and then blown to the second heat exchange component. At this time, most of the frost layer will appear on the first heat exchange component. When the air-conditioning system is in defrost mode, the first flow direction control unit will be opened and the second flow direction control unit will be in the first flow state. At this time, after the refrigerant is discharged from the exhaust port of the compressor, a part of it passes through the second heat exchange component and flows out from the other end of the first throttling unit; the other part passes through the first heat exchange component and flows out from the other end of the first throttling unit. The refrigerant coming out of the exhaust port is a high-temperature and high-pressure refrigerant. After directly passing through the first heat exchange component for heat exchange, the frost layer on the first heat exchange component can be effectively removed. At the same time, the second heat exchange component participates in the heating cycle of the indoor unit. Based on the above structure and control, the outdoor unit with the heat exchange device of the present application can participate in the heating cycle of the indoor unit while defrosting, avoiding the problem in the prior art that defrosting and heating cannot be carried out at the same time, resulting in a drop in room temperature during defrosting.

[0042] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0044] Figure 1 It is a structural schematic diagram of a heat exchange device provided in Example 1 of the present application.

[0045] Figure 2 It is a structural schematic diagram of a second flow direction control unit in a heat exchange device provided in Example 1 of the present application.

[0046] Figure 3 This is a schematic diagram of the structure of an outdoor unit provided in Example 2 of the present application.

[0047] Figure 4 It is a structural schematic diagram of an air conditioning system provided in an embodiment of the present application.

[0048] Figure 5 It is a flow chart of a control method for an air-conditioning system provided in Embodiment 4 of the present application.

[0049] Figure 6 It is a flow chart of a control method of an air-conditioning system provided in Embodiment 5 of the present application.

[0050] Figure 7 It is a structural schematic diagram of a control device for an air-conditioning system provided in Example 6 of the present application.

[0051] Figure 8 It is a structural schematic diagram of a control device for an air-conditioning system provided in Example 7 of the present application.

[0052] Fig. 9 It is a structural schematic diagram of a control device for an air-conditioning system provided in Example 8 of the present application. DETAILED DESCRIPTION

[0053] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0054] When the air conditioner is running in a low temperature environment, the outdoor heat exchanger may be frosted, resulting in a reduction in the air conditioner's heating capacity. At this time, the outdoor heat exchanger of the air conditioner needs to be defrosted.

[0055] At present, in the existing air conditioning control logic, there are generally two defrosting methods: refrigeration cycle defrosting and hot gas defrosting. Refrigeration cycle defrosting is to control the reversing of the four-way valve to switch the air conditioning system from the heating cycle to the refrigeration cycle. The outdoor heat exchanger will act as a condenser to condense the high-temperature refrigerant in the refrigeration cycle state, thereby using the high-temperature refrigerant to achieve defrosting; hot gas defrosting is to increase the opening of the expansion valve and reduce the throttling effect of the expansion valve, so that the high-temperature refrigerant enters the outdoor heat exchanger for defrosting. However, when the air conditioning system uses these two defrosting methods for defrosting, it cannot heat the room at the same time, causing the room temperature to drop, affecting the user's heating use.

[0056] In order to solve the above technical problems, the present application provides a heat exchange device, an outdoor unit, an air-conditioning system and a control method, device and equipment thereof, which are described below in the form of embodiments.

[0057] Embodiment 1

[0058] See also Figure 1 , Figure 1 It is a structural schematic diagram of a heat exchange device provided in Example 1 of the present application.

[0059] like Figure 1 As shown, the heat exchange device provided in this embodiment is applied to an outdoor unit and may include: a first heat exchange component 2, a second heat exchange component 1, a first flow direction control unit 3, a second flow direction control unit 4, and a fan 5;

[0060] The first heat exchange component is arranged between the second heat exchange component and the fan, so that the fan blows air to the first heat exchange component and the second heat exchange component in sequence for heat exchange;

[0061] The second flow control unit includes a first end 41, a second end 42 and a third end 43; one end of the first heat exchange component and one end of the second heat exchange component are both connected to one end of the first throttling unit; the other end of the first heat exchange component is connected to the first end, and the second end is used to connect to the exhaust port of the compressor of the outdoor unit, so that when the air-conditioning system in which the outdoor unit is located is in the defrost mode, the first flow control unit is controlled to be opened and the second flow control unit is in the first flow state, and after the refrigerant is discharged from the exhaust port of the compressor, a part of it passes through the second heat exchange component and flows out from the other end of the first throttling unit; the other part passes through the first heat exchange component and flows out from the other end of the first throttling unit; when the air-conditioning system in which the outdoor unit is located is in other modes except the defrost mode, the first flow control unit is controlled to be closed and the second flow control unit is in the second flow state, and the refrigerant flows in from the other end of the second heat exchange component, passes through the second heat exchange component and the first heat exchange component in sequence, and flows out from the third end.

[0062] The heat exchange device of the outdoor unit is provided with a first heat exchange component, a second heat exchange component, a first flow control unit, a second flow control unit, and a fan, wherein the first heat exchange component is arranged between the second heat exchange component and the fan; so that the fan blows air to the first heat exchange component and the second heat exchange component in sequence for heat exchange. In addition, since one end of the first heat exchange component and one end of the second heat exchange component are both connected to one end of the first throttling unit; the other end of the first heat exchange component is connected to the first end, and the second end is used to connect to the exhaust port of the compressor of the outdoor unit. Therefore, when the air-conditioning system is in a mode other than the defrost mode, such as the heating mode, the first flow control unit will be closed and the second flow control unit will be in the second flow state, and the refrigerant will flow from the second heat exchange component to the first heat exchange component. Based on this, the temperature of the refrigerant flowing into the first heat exchange component is lower than that of the refrigerant flowing into the second heat exchange component, and the fan blows air from the first heat exchange component to the second heat exchange component. The refrigerant temperature of the heat component is lower, and the air will be dehumidified first, and then blown to the second heat exchange component. At this time, most of the frost layer will appear on the first heat exchange component. When the air-conditioning system is in defrost mode, the first flow direction control unit will be opened and the second flow direction control unit will be in the first flow state. At this time, after the refrigerant is discharged from the exhaust port of the compressor, a part of it passes through the second heat exchange component and flows out from the other end of the first throttling unit; the other part passes through the first heat exchange component and flows out from the other end of the first throttling unit. The refrigerant coming out of the exhaust port is a high-temperature and high-pressure refrigerant. After directly passing through the first heat exchange component for heat exchange, the frost layer on the first heat exchange component can be effectively removed. At the same time, the second heat exchange component participates in the heating cycle of the indoor unit. Based on the above structure and control, the outdoor unit with the heat exchange device of the present application can participate in the heating cycle of the indoor unit while defrosting, avoiding the problem in the prior art that defrosting and heating cannot be carried out at the same time, resulting in a drop in room temperature during defrosting.

[0063] It should be noted that the second flow control unit is provided with a first end, a second end, and a third end, and its specific structure can be various, for example, it can be a three-way valve, and the specific type can be a T-type three-way valve, and the first valve port, the second valve port, and the third valve port of the three-way valve correspond to the first end, the second end, and the third end of the second flow control, for example, the first valve port corresponds to the first end, the second valve port corresponds to the second end, and the third valve port corresponds to the third end. When the second flow control unit is in the first flow state, the first valve port and the second valve port are in a connected state, the first valve port and the third valve port are in a closed state, and the second valve port and the third valve port are also in a closed state; when the second flow control unit is in the second flow state, the first valve port and the third valve port are in a connected state, the first valve port and the second valve port are in a closed state, and the second valve port and the third valve port are also in a closed state.

[0064] In addition, the second flow control unit can also be composed of two two-way valves, which can be used to Figure 2 , Figure 2Schematic diagram of the structure of a second flow control unit in a heat exchange device provided in Example 1 of the present application. Figure 2 As shown, the second flow control unit may include a first two-way valve 45 and a second two-way valve 44, wherein the first two-way valve is provided with a fourth valve port and a fifth valve port, and the second two-way valve is provided with a sixth valve port and a seventh valve port, and correspondingly, the fourth valve port and the sixth valve port are the above-mentioned first end 41, the fifth valve port is the above-mentioned second end 42, and the seventh valve port is the above-mentioned third end 43. When the second flow control unit is in the first flow state, the first two-way valve is opened, and the second two-way valve is closed, at which time only the fourth valve port and the fifth valve port are in a communication state; when the second flow control unit is in the second flow state, the first two-way valve is closed, and the second two-way valve is opened, at which time only the sixth valve port and the seventh valve port are in a communication state.

[0065] In order to make the dehumidification capacity of the above-mentioned first heat exchanger stronger, that is, to make the frost layer more distributed on the first heat exchanger, the first heat exchange component in this embodiment may include a first throttling unit and a first heat exchanger, and the second heat exchange component may include a second heat exchanger, and the first throttling unit is arranged between the first heat exchanger and the second heat exchanger. When in non-defrosting mode, such as heating mode, the refrigerant comes out of the second heat exchanger and first passes through the first throttling unit for throttling before entering the first heat exchanger. The temperature of the refrigerant entering the first heat exchanger will be lower, the dehumidification effect of the first heat exchanger will be better, and the frost layer will be more concentrated on the first heat exchanger.

[0066] It should be noted that the above frost layer generally appears in a low temperature environment and the air conditioning system is in heating mode, so the above examples of frost layer appearing are all examples in heating mode. When the air conditioner is in a mode other than heating mode and defrosting mode, the opening and closing states of the first flow control unit and the second flow control unit are the same as in the heating mode, and will not be repeated here.

[0067] In addition, the type of the first heat exchanger in this embodiment may be, but is not limited to, a tube-fin heat exchanger or a microchannel heat exchanger; the type of the second heat exchanger may be, but is not limited to, a tube-fin heat exchanger or a microchannel heat exchanger. The type of the first throttling unit may be, but is not limited to, capillary throttling, throttling short tube throttling, or electronic expansion valve throttling.

[0068] Embodiment 2

[0069] See also Figure 3 , Figure 3 This is a schematic diagram of the structure of an outdoor unit provided in Example 2 of the present application.

[0070] like Figure 3 As shown, the outdoor unit provided in the embodiment of the present application includes: a second throttling unit 6, a reversing valve 7, a compressor 8 and a heat exchange device as in the first embodiment of the present application;

[0071] The other end of the first heat exchange component in the heat exchange device is connected to one end of the second throttling unit;

[0072] The reversing valve includes an eighth valve port, a ninth valve port, a tenth valve port and an eleventh valve port; the eighth valve port is connected to the third end and the other end of the first flow direction control unit; the ninth valve port is connected to the air inlet of the compressor; the eleventh valve port is connected to the exhaust port of the compressor; the other end of the second throttling unit and the tenth valve port are used to connect to the indoor unit heat exchanger in the air-conditioning system where the outdoor unit is located.

[0073] The reversing valve may be a four-way valve. The working process of the outdoor unit is described below in the defrosting mode and the heating mode.

[0074] When the outdoor unit is in heating mode, the flow status of the four-way valve is as follows: Figure 3 As shown, the eighth valve port is connected to the ninth valve port, and the tenth valve port is connected to the eleventh valve port. Since the first flow control unit is closed and the second flow control unit is in the second flow state, after the refrigerant comes out of the exhaust port of the compressor, it passes through the eleventh valve port, the tenth valve port, the indoor unit heat exchanger, the second throttling unit, the second heat exchanger, the first throttling unit, the first heat exchanger, the first end and the third end of the second flow control unit, the eighth valve port, and the ninth valve port in sequence and enters the compressor from the air inlet of the compressor. Since the refrigerant passes through the first throttling unit for throttling before entering the first heat exchanger after coming out of the second heat exchanger, the temperature of the refrigerant entering the first heat exchanger will be lower, the dehumidification effect of the first heat exchanger will be better, and the frost layer will be more concentrated on the first heat exchanger.

[0075] When the outdoor unit is in defrost mode, the flow status of the four-way valve is the same as Figure 3 As shown, the eighth valve port is connected to the ninth valve port, and the tenth valve port is connected to the eleventh valve port. Since the first flow direction control unit is opened and the second flow direction control unit is in the first flow state, after the refrigerant comes out of the exhaust port of the compressor, a part of it will pass through the eleventh valve port, the tenth valve port, the indoor unit heat exchanger, the second throttling unit, the second heat exchanger, the first flow direction control unit, the eighth valve port, and the ninth valve port in sequence, and enter the compressor from the air inlet of the compressor to complete the circulation of the indoor heat exchanger and continue to provide heat for the room; the other part will pass through the second end and the first end of the second flow direction control unit, the first heat exchanger, the first throttling unit, the first flow direction control unit, the eighth valve port, and the ninth valve port in sequence, and enter the compressor from the air inlet of the compressor to remove the frost layer concentrated on the first heat exchanger.

[0076] It should be noted that the type of the second throttling unit may be, but is not limited to, capillary throttling, throttling short tube throttling or electronic expansion valve throttling.

[0077] Embodiment 3

[0078] See also Figure 4 , Figure 4 It is a structural schematic diagram of an air conditioning system provided in an embodiment of the present application.

[0079] like Figure 4 As shown, the air conditioning system provided in the third embodiment of the present application may include: an indoor unit and an outdoor unit as in the second embodiment of the present application;

[0080] The indoor unit comprises an indoor heat exchanger 9, one end of the indoor heat exchanger is connected to the other end of the second throttling unit, and the other end is connected to the tenth valve port.

[0081] In addition, an electric auxiliary heating unit 10 can be set in the indoor unit. When the air-conditioning system is in defrost mode, since only a part of the refrigerant enters the indoor unit heat exchanger for heat exchange, in order to make the heating effect of the air-conditioning system in defrost mode better, the electric auxiliary heating unit can be turned on at the same time.

[0082] It should be noted that the operation of the air-conditioning system in each mode in this embodiment can refer to the first and second embodiments, and will not be described in detail in this embodiment.

[0083] Embodiment 4

[0084] See also Figure 5 , Figure 5 It is a flow chart of a control method for an air-conditioning system provided in Embodiment 4 of the present application.

[0085] like Figure 5 As shown, the control method of the air conditioning system provided in this embodiment may include:

[0086] Step S501, receiving an operation mode signal of the air conditioning system; the operation mode signal includes a defrost mode signal and other mode signals except the defrost mode;

[0087] Step S502, when the operation mode signal is a defrost mode signal, control the first flow direction control unit to be open and the second flow direction control unit to be in the first flow state, so that the refrigerant flows into the heat exchange device from the other end of the second heat exchange component and the second end of the second flow direction control unit respectively, flows out from the other end of the first throttling unit, and flows into the air inlet of the compressor after passing through the reversing valve;

[0088] Step S503, when the operation mode signal is a mode signal other than the defrost mode, the first flow direction control unit is controlled to be closed and the second flow direction control unit is controlled to be in the second flow state, so that the refrigerant flows in from the other end of the second heat exchange component and flows out from the third end.

[0089] When the outdoor unit is in heating mode, the flow status of the four-way valve is as follows: Figure 3As shown, the eighth valve port is connected to the ninth valve port, and the tenth valve port is connected to the eleventh valve port. Since the first flow control unit is closed and the second flow control unit is in the second flow state, after the refrigerant comes out of the exhaust port of the compressor, it passes through the eleventh valve port, the tenth valve port, the indoor unit heat exchanger, the second throttling unit, the second heat exchanger, the first throttling unit, the first heat exchanger, the first end and the third end of the second flow control unit, the eighth valve port, and the ninth valve port in sequence and enters the compressor from the air inlet of the compressor. Since the refrigerant passes through the first throttling unit for throttling before entering the first heat exchanger after coming out of the second heat exchanger, the temperature of the refrigerant entering the first heat exchanger will be lower, the dehumidification effect of the first heat exchanger will be better, and the frost layer will be more concentrated on the first heat exchanger.

[0090] When the outdoor unit is in defrost mode, the flow status of the four-way valve is the same as Figure 3 As shown, the eighth valve port is connected to the ninth valve port, and the tenth valve port is connected to the eleventh valve port. Since the first flow direction control unit is opened and the second flow direction control unit is in the first flow state, after the refrigerant comes out of the exhaust port of the compressor, a part of it will pass through the eleventh valve port, the tenth valve port, the indoor unit heat exchanger, the second throttling unit, the second heat exchanger, the first flow direction control unit, the eighth valve port, and the ninth valve port in sequence, and enter the compressor from the air inlet of the compressor to complete the circulation of the indoor heat exchanger and continue to provide heat for the room; the other part will pass through the second end and the first end of the second flow direction control unit, the first heat exchanger, the first throttling unit, the first flow direction control unit, the eighth valve port, and the ninth valve port in sequence, and enter the compressor from the air inlet of the compressor to remove the frost layer concentrated on the first heat exchanger.

[0091] It should be noted that, in this embodiment, the control of the first flow direction control unit and the second flow direction control unit when receiving other mode signals are the same. You can refer to the specific example when the mode signal is a heating mode signal. The air-conditioning control logic corresponding to the mode signals other than the heating mode signal is just based on the control of the first flow direction control unit and the second flow control unit (the control here is the same as the logic corresponding to the heating mode signal), and adds control to the reversing valve. For example, in the cooling mode, the flow state of the reversing valve needs to be switched so that the eighth valve port is connected to the eleventh valve port, and the ninth valve port is connected to the tenth valve port.

[0092] Embodiment 5

[0093] See also Figure 6 , Figure 6 It is a flow chart of a control method of an air-conditioning system provided in Embodiment 5 of the present application.

[0094] like Figure 6 As shown, the control method of the air conditioning system provided in this embodiment may include:

[0095] Step S601, receiving an operation mode signal of the air conditioning system; the operation mode signal includes a defrost mode signal and other mode signals except the defrost mode;

[0096] Step S602: When the operation mode signal is a defrost mode signal, the first flow direction control unit is controlled to be turned on, the second flow direction control unit is controlled to be in the first flow state, and the electric auxiliary heating unit is turned on, so that the refrigerant flows into the heat exchange device from the other end of the second heat exchange component and the second end of the second flow direction control unit, flows out from the other end of the first throttling unit, and flows into the air inlet of the compressor after passing through the reversing valve;

[0097] When the air conditioning system is in defrost mode, since only a portion of the refrigerant enters the indoor unit heat exchanger for heat exchange, in order to make the heating effect of the air conditioning system in defrost mode better, the electric auxiliary heating unit can be turned on at the same time.

[0098] Step S603, when the operation mode signal is a mode signal other than the defrost mode, the first flow direction control unit is controlled to be closed and the second flow direction control unit is controlled to be in the second flow state, so that the refrigerant flows in from the other end of the second heat exchange component and flows out from the third end.

[0099] When the outdoor unit is in heating mode, the flow status of the four-way valve is as follows: Figure 3 As shown, the eighth valve port is connected to the ninth valve port, and the tenth valve port is connected to the eleventh valve port. Since the first flow control unit is closed and the second flow control unit is in the second flow state, after the refrigerant comes out of the exhaust port of the compressor, it passes through the eleventh valve port, the tenth valve port, the indoor unit heat exchanger, the second throttling unit, the second heat exchanger, the first throttling unit, the first heat exchanger, the first end and the third end of the second flow control unit, the eighth valve port, and the ninth valve port in sequence and enters the compressor from the air inlet of the compressor. Since the refrigerant passes through the first throttling unit for throttling before entering the first heat exchanger after coming out of the second heat exchanger, the temperature of the refrigerant entering the first heat exchanger will be lower, the dehumidification effect of the first heat exchanger will be better, and the frost layer will be more concentrated on the first heat exchanger.

[0100] When the outdoor unit is in defrost mode, the flow status of the four-way valve is the same as Figure 3As shown, the eighth valve port is connected to the ninth valve port, and the tenth valve port is connected to the eleventh valve port. Since the first flow direction control unit is opened and the second flow direction control unit is in the first flow state, after the refrigerant comes out of the exhaust port of the compressor, a part of it will pass through the eleventh valve port, the tenth valve port, the indoor unit heat exchanger, the second throttling unit, the second heat exchanger, the first flow direction control unit, the eighth valve port, and the ninth valve port in sequence, and enter the compressor from the air inlet of the compressor to complete the circulation of the indoor heat exchanger and continue to provide heat for the room; the other part will pass through the second end and the first end of the second flow direction control unit, the first heat exchanger, the first throttling unit, the first flow direction control unit, the eighth valve port, and the ninth valve port in sequence, and enter the compressor from the air inlet of the compressor to remove the frost layer concentrated on the first heat exchanger.

[0101] It should be noted that, in this embodiment, the control of the first flow direction control unit and the second flow direction control unit when receiving other mode signals are the same. You can refer to the specific example when the mode signal is a heating mode signal. The air-conditioning control logic corresponding to the mode signals other than the heating mode signal is just based on the control of the first flow direction control unit and the second flow control unit (the control here is the same as the logic corresponding to the heating mode signal), and adds control to the reversing valve. For example, in the cooling mode, the flow state of the reversing valve needs to be switched so that the eighth valve port is connected to the eleventh valve port, and the ninth valve port is connected to the tenth valve port.

[0102] Embodiment 6

[0103] See also Figure 7 , Figure 7 It is a structural schematic diagram of a control device for an air-conditioning system provided in Example 6 of the present application.

[0104] like Figure 7 As shown, the control device of the air conditioning system provided in this embodiment includes:

[0105] The first receiving module 71 is used to receive an operation mode signal of the air conditioning system; the operation mode signal includes a defrost mode signal and other mode signals except the defrost mode;

[0106] The first control module 72 is used for controlling the first flow control unit to be turned on and the second flow control unit to be in the first flow state when the operation mode signal is the defrost mode signal, so that the refrigerant flows into the heat exchange device from the other end of the second heat exchange component and the second end of the second flow control unit, flows out from the other end of the first throttling unit, and flows into the air inlet of the compressor after passing through the reversing valve;

[0107] The second control module 73 is used to control the first flow control unit to be closed and the second flow control unit to be in the second flow state when the operation mode signal is a mode signal other than the defrost mode, so that the refrigerant flows in from the other end of the second heat exchange component and flows out from the third end.

[0108] Embodiment 7

[0109] See also Figure 8 , Figure 8 It is a structural schematic diagram of a control device for an air-conditioning system provided in Example 7 of the present application.

[0110] like Figure 8 As shown, the control device of the air conditioning system provided in this embodiment includes:

[0111] The second receiving module 81 is used to receive an operation mode signal of the air conditioning system; the operation mode signal includes a defrost mode signal and other mode signals except the defrost mode;

[0112] The third control module 82 is used for controlling the first flow control unit to be turned on and the second flow control unit to be in the first flow state when the operation mode signal is the defrost mode signal, and turning on the electric auxiliary heating unit, so that the refrigerant flows into the heat exchange device from the other end of the second heat exchange component and the second end of the second flow control unit, flows out from the other end of the first throttling unit, and flows into the air inlet of the compressor after passing through the reversing valve;

[0113] The fourth control module 83 is used to control the first flow control unit to be closed and the second flow control unit to be in the second flow state when the operation mode signal is a mode signal other than the defrost mode, so that the refrigerant flows in from the other end of the second heat exchange component and flows out from the third end.

[0114] Embodiment 8

[0115] See also Fig. 9 , Fig. 9 It is a structural schematic diagram of a control device for an air-conditioning system provided in Example 8 of the present application.

[0116] like Fig. 9 As shown, the control device of the air conditioning system provided in this embodiment includes:

[0117] A processor 91, and a memory 92 connected to the processor;

[0118] The memory is used to store a computer program, and the computer program is used to at least execute the control method of the air conditioning system of the fourth embodiment or the fifth embodiment of the present application;

[0119] The processor is used to call and execute the computer program in the memory.

[0120] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0121] It can be understood that the same or similar parts of the above embodiments can be referenced to each other, and the contents not described in detail in some embodiments can refer to the same or similar contents in other embodiments.

[0122] It should be noted that, in the description of this application, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of this application, unless otherwise specified, the meaning of "plurality" refers to at least two.

[0123] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0124] It should be understood that the various parts of the present application can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0125] A person skilled in the art may understand that all or part of the steps in the above-mentioned embodiment method may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0126] In addition, each functional unit in each embodiment of the present application may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0127] The storage medium mentioned above can be a read-only memory, a magnetic disk or an optical disk, etc.

[0128] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0129] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A heat exchange device, applied to an outdoor unit, characterized in that: include: A first heat exchange component, a second heat exchange component, a first flow direction control unit, a second flow direction control unit, and a fan; The first heat exchange component is arranged between the second heat exchange component and the fan, so that the fan blows air to the first heat exchange component and the second heat exchange component in sequence for heat exchange; The second flow control unit includes a first end, a second end and a third end; one end of the first heat exchange component and one end of the second heat exchange component are both connected to one end of the first throttling unit; the other end of the first heat exchange component is connected to the first end, and the second end is used to connect to the exhaust port of the compressor of the outdoor unit, so that when the air-conditioning system in which the outdoor unit is located is in the defrost mode, the first flow control unit is controlled to be opened and the second flow control unit is in the first flow state, and after the refrigerant is discharged from the exhaust port of the compressor, a part of it flows out from the other end of the second flow control unit after passing through the second heat exchange component; the other part flows out from the other end of the first throttling unit after passing through the first heat exchange component; when the air-conditioning system in which the outdoor unit is located is in other modes except the defrost mode, the first flow control unit is controlled to be closed and the second flow control unit is in the second flow state, and the refrigerant flows in from the other end of the second heat exchange component, passes through the second heat exchange component and the first heat exchange component in sequence, and flows out from the third end.

2. The heat exchange device according to claim 1, characterized in that: The second flow direction control unit includes a three-way valve, the three-way valve includes a first valve port, a second valve port and a third valve port, the first valve port is the first end, the second valve port is the second end, and the third valve port is the third end; or, The second flow direction control unit includes a first two-way valve and a second two-way valve; the first two-way valve includes a fourth valve port and a fifth valve port, and the second two-way valve includes a sixth valve port and a seventh valve port; the fourth valve port and the sixth valve port are the first end, the fifth valve port is the second end, and the seventh valve port is the third end.

3. The heat exchange device according to claim 1 or 2, characterized in that: The first heat exchange component includes a first heat exchanger and a first throttling unit; the second heat exchange component includes a second heat exchanger; and the first throttling unit is arranged between the first heat exchanger and the second heat exchanger.

4. The heat exchange device according to claim 3, characterized in that: The first heat exchanger is a tube-fin heat exchanger or a microchannel heat exchanger; the second heat exchanger is a tube-fin heat exchanger or a microchannel heat exchanger.

5. The heat exchange device according to claim 3, characterized in that: The type of the first throttling unit is capillary throttling, throttling short tube throttling or electronic expansion valve throttling.

6. An outdoor unit, characterized in that: include: A second throttling unit, a reversing valve and a compressor and a heat exchange device as claimed in any one of claims 1 to 5; The other end of the first heat exchange component in the heat exchange device is connected to one end of the second throttling unit; The reversing valve includes an eighth valve port, a ninth valve port, a tenth valve port and an eleventh valve port; the eighth valve port is connected to the third end and the other end of the first flow direction control unit; the ninth valve port is connected to the air inlet of the compressor; the eleventh valve port is connected to the exhaust port of the compressor; the other end of the second throttling unit and the tenth valve port are used to connect to the indoor unit heat exchanger in the air-conditioning system where the outdoor unit is located.

7. The outdoor unit according to claim 6, characterized in that: The type of the second throttling unit is capillary tube throttling, throttling short tube throttling or electronic expansion valve throttling.

8. An air conditioning system, characterized in that: comprising an indoor unit and an outdoor unit as claimed in claim 6 or 7; The indoor unit includes the indoor unit heat exchanger, one end of the indoor unit heat exchanger is connected to the other end of the second throttling unit, and the other end is connected to the tenth valve port.

9. The air conditioning system according to claim 8, characterized in that: The indoor unit is provided with an electric auxiliary heating unit.

10. A control method for an air conditioning system, applied to the air conditioning system according to claim 8 or 9, characterized in that: include: receiving an operation mode signal of an air conditioning system; The operation mode signal includes a defrost mode signal and other mode signals except the defrost mode; When the operation mode signal is a defrost mode signal, the first flow control unit is controlled to be opened and the second flow control unit is controlled to be in a first flow state, so that the refrigerant flows into the heat exchange device from the other end of the second heat exchange component and the second end of the second flow control unit respectively, flows out from the other end of the first throttling unit, and flows into the air inlet of the compressor after passing through the reversing valve; When the operation mode signal is a mode signal other than the defrost mode, the first flow direction control unit is controlled to be closed and the second flow direction control unit is in a second flow state, so that the refrigerant flows in from the other end of the second heat exchange component and flows out from the third end.

11. A control device for an air conditioning system, applied to the air conditioning system according to claim 8 or 9, characterized in that: include: A first receiving module, used for receiving an operation mode signal of the air conditioning system; The operation mode signal includes a defrost mode signal and other mode signals except the defrost mode; a first control module, for controlling the first flow control unit to be opened and the second flow control unit to be in a first flow state when the operation mode signal is a defrost mode signal, so that the refrigerant flows into the heat exchange device from the other end of the second heat exchange component and the second end of the second flow control unit, flows out from the other end of the first throttling unit, and flows into the air inlet of the compressor after passing through the reversing valve; The second control module is used to control the first flow direction control unit to be closed and the second flow direction control unit to be in a second flow state when the operating mode signal is a mode signal other than the defrost mode, so that the refrigerant flows in from the other end of the second heat exchange component and flows out from the third end.

12. A control method for an air conditioning system, applied to the air conditioning system according to claim 9, characterized in that: include: receiving an operation mode signal of an air conditioning system; The operation mode signal includes a defrost mode signal and other mode signals except the defrost mode; When the operation mode signal is a defrost mode signal, the first flow direction control unit is controlled to be opened, the second flow direction control unit is controlled to be in the first flow state, and the electric auxiliary heating unit is turned on, so that the refrigerant flows into the heat exchange device from the other end of the second heat exchange component and the second end of the second flow direction control unit respectively, flows out from the other end of the first throttling unit, and flows into the air inlet of the compressor after passing through the reversing valve; When the operation mode signal is a mode signal other than the defrost mode, the first flow direction control unit is controlled to be closed and the second flow direction control unit is in a second flow state, so that the refrigerant flows in from the other end of the second heat exchange component and flows out from the third end.

13. A control device for an air conditioning system, applied to the air conditioning system according to claim 9, characterized in that: include: A second receiving module, used for receiving an operation mode signal of the air conditioning system; The operation mode signal includes a defrost mode signal and other mode signals except the defrost mode; a third control module, configured to control the first flow direction control unit to be turned on, the second flow direction control unit to be in a first flow state, and the electric auxiliary heating unit to be turned on when the operation mode signal is a defrost mode signal, so that the refrigerant flows into the heat exchange device from the other end of the second heat exchange component and the second end of the second flow direction control unit, flows out from the other end of the first throttling unit, and flows into the air inlet of the compressor after passing through the reversing valve; The fourth control module is used to control the first flow direction control unit to be closed and the second flow direction control unit to be in a second flow state when the operating mode signal is a mode signal other than the defrost mode, so that the refrigerant flows in from the other end of the second heat exchange component and flows out from the third end.

14. A control device for an air conditioning system, characterized in that: include: A processor, and a memory connected to the processor; The memory is used to store a computer program, and the computer program is used to at least execute the control method of the air conditioning system according to claim 10 or 12; The processor is used to call and execute the computer program in the memory.

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