Air conditioner, air conditioner defrosting control method and readable storage medium

Abstract

The invention provides an air conditioner, an air conditioner defrosting control method and a readable storage medium, and is applied to the field of air conditioner control. The method comprises the steps that under the condition that the air conditioner operates in a heating mode, a defrosting signal is received; according to the defrosting signal, defrosting control is conducted on a first four-way valve, and / or a second four-way valve, and / or a first switch valve, and / or a second switch valve, and / or a first electronic expansion valve, and / or a second electronic expansion valve, and / or a third electronic expansion valve; wherein the first sub-passage is a refrigerant passage between the first outdoor heat exchanger and the first electronic expansion valve; and the second sub-passage is a refrigerant passage between the second outdoor heat exchanger and the second electronic expansion valve. According to the air conditioner, the air conditioner defrosting control method and the readable storage medium, the outdoor heat exchange unit is defrosted while continuous heating is achieved through partition defrosting, and defrosting is achieved under the condition that the system does not absorb indoor heat.

Description

Technical Field

[0001] This application relates to the field of air conditioner control, and particularly to an air conditioner, an air conditioner defrosting control method, and a readable storage medium. Background Art

[0002] With the continuous improvement of people's living standards and the continuous enhancement of the intelligent level of household appliances, intelligent household appliances are becoming more and more popular. Users can use the air conditioner for heating in winter to increase the indoor temperature; they can also use the air conditioner for cooling in summer to lower the indoor temperature.

[0003] When using the air conditioner to heat the indoor environment, frosting may occur on the surface of the outdoor heat exchanger. In order to avoid the large impact of frosting on the normal operation of the air conditioner, it is necessary to defrost the outdoor heat exchanger. In the related art, most defrosting is carried out through reverse circulation, that is, when it is detected that the outdoor heat exchanger needs to be defrosted, the four-way valve is powered off, and the high-temperature and high-pressure refrigerant enters the indoor heat exchange unit after defrosting through the outdoor heat exchange unit.

[0004] However, such a defrosting method still inevitably absorbs indoor heat and causes the indoor temperature to drop even when the indoor unit shuts down the fan, and due to the repeated start and stop of heating, the indoor temperature fluctuates repeatedly, resulting in poor comfort. Summary of the Invention

[0005] The purpose of this application is to provide an air conditioner, an air conditioner defrosting control method, and a readable storage medium, which are used to defrost the outdoor heat exchange unit while realizing continuous heating through zoned defrosting, so as to realize defrosting without absorbing indoor heat.

[0006] This application provides an air conditioner, including: An indoor heat exchange unit, a first outdoor heat exchanger and a second outdoor heat exchanger connected in parallel, and a control unit; the indoor heat exchange unit and the first outdoor heat exchanger form a first refrigerant path; the indoor heat exchange unit and the second outdoor heat exchanger form a second refrigerant path; a first four-way valve and a first switching valve are arranged on the first refrigerant path; a second four-way valve and a second switching valve are arranged on the second refrigerant path; a first electronic expansion valve is arranged between the first outdoor heat exchanger and the indoor heat exchange unit; a second electronic expansion valve is arranged between the second outdoor heat exchanger and the indoor heat exchange unit; a third electronic expansion valve is arranged between the first sub-path and the second sub-path; the control unit is configured to perform defrosting control on at least one of the first four-way valve, the second four-way valve, the first switching valve, the second switching valve, the first electronic expansion valve, the second electronic expansion valve, and the third electronic expansion valve according to a defrosting signal; wherein, the first sub-path is a refrigerant path between the first outdoor heat exchanger and the first electronic expansion valve; the second sub-path is a refrigerant path between the second outdoor heat exchanger and the second electronic expansion valve.

[0007] Optionally, check valves are arranged between the first refrigerant path and the gas-liquid separator, and between the second refrigerant path and the gas-liquid separator; the check valves are used to control the one-way flow of refrigerant from the outdoor heat exchanger to the gas-liquid separator.

[0008] Optionally, the control unit is further configured to, when the air conditioner is operating in the heating mode, control the first four-way valve to be energized, the second four-way valve to be energized, the first switching valve to be opened, the second switching valve to be opened, the first electronic expansion valve to be opened, the second electronic expansion valve to be opened, and the third electronic expansion valve to be closed; wherein, when the air conditioner is operating in the heating mode, the refrigerant discharged from the compressor passes through the first four-way valve, the first switching valve, the indoor heat exchange unit, the first electronic expansion valve, and the first outdoor heat exchanger, and then returns to the compressor through the gas-liquid separator; when the air conditioner is operating in the heating mode, the refrigerant discharged from the compressor passes through the second four-way valve, the second switching valve, the indoor heat exchange unit, the second electronic expansion valve, and the second outdoor heat exchanger, and then returns to the compressor through the gas-liquid separator.

[0009] Optionally, the defrosting signal includes: a first signal for indicating that the first outdoor heat exchanger needs to perform a defrosting operation; the control unit is specifically configured to, in response to the first signal, control the first four-way valve to de-energize, the first switching valve to close, the first electronic expansion valve to close, and the third electronic expansion valve to open; or, the control unit is specifically configured to, in response to the first signal, control the first four-way valve to de-energize, the first switching valve to close, the second switching valve to close, the first electronic expansion valve to close, the second electronic expansion valve to close, and the third electronic expansion valve to open.

[0010] Optionally, the defrosting signal includes: a second signal for indicating that the second outdoor heat exchanger needs to perform a defrosting operation; the control unit is specifically configured to, in response to the second signal, control the second four-way valve to de-energize, the second switching valve to close, the second electronic expansion valve to close, and the third electronic expansion valve to open; or, the control unit is specifically configured to, in response to the second signal, control the second four-way valve to de-energize, the first switching valve to close, the second switching valve to close, the first electronic expansion valve to close, the second electronic expansion valve to close, and the third electronic expansion valve to open.

[0011] This application further provides an air conditioner defrosting control method, including: When the air conditioner is operating in the heating mode, receiving a defrosting signal; performing defrosting control on the first four-way valve, and / or, the second four-way valve, and / or, the first switching valve, and / or, the second switching valve, and / or, the first electronic expansion valve, and / or, the second electronic expansion valve, and / or, the third electronic expansion valve according to the defrosting signal; wherein, the first sub-path is the refrigerant path between the first outdoor heat exchanger and the first electronic expansion valve; the second sub-path is the refrigerant path between the second outdoor heat exchanger and the second electronic expansion valve.

[0012] Optionally, before performing defrosting control on at least one of the first four-way valve, the second four-way valve, the first switching valve, the second switching valve, the first electronic expansion valve, the second electronic expansion valve, and the third electronic expansion valve according to the defrosting signal, the method further includes: when the air conditioner is operating in the heating mode, controlling the first four-way valve to be energized, the second four-way valve to be energized, the first switching valve to be opened, the second switching valve to be opened, the first electronic expansion valve to be opened, the second electronic expansion valve to be opened, and the third electronic expansion valve to be closed; wherein, when the air conditioner is operating in the heating mode, the refrigerant discharged from the compressor passes through the first four-way valve, the first switching valve, the indoor heat exchange unit, the first electronic expansion valve, and the first outdoor heat exchanger, and then returns to the compressor through the gas-liquid separator; when the air conditioner is operating in the heating mode, the refrigerant discharged from the compressor passes through the second four-way valve, the second switching valve, the indoor heat exchange unit, the second electronic expansion valve, and the second outdoor heat exchanger, and then returns to the compressor through the gas-liquid separator.

[0013] Optionally, the defrosting signal includes: a first signal for indicating that the first outdoor heat exchanger needs to perform a defrosting operation; performing defrosting control on at least one of the first four-way valve, the second four-way valve, the first switching valve, the second switching valve, the first electronic expansion valve, the second electronic expansion valve, and the third electronic expansion valve according to the defrosting signal includes: in response to the first signal, controlling the first four-way valve to be de-energized, the first switching valve to be closed, the first electronic expansion valve to be closed, and the third electronic expansion valve to be opened; or, in response to the first signal, controlling the first four-way valve to be de-energized, the first switching valve to be closed, the second switching valve to be closed, the first electronic expansion valve to be closed, the second electronic expansion valve to be closed, and the third electronic expansion valve to be opened.

[0014] Optionally, the defrosting signal includes: a second signal for indicating that the first outdoor heat exchanger needs to perform a defrosting operation; performing defrosting control on at least one of the first four-way valve, the second four-way valve, the first switching valve, the second switching valve, the first electronic expansion valve, the second electronic expansion valve, and the third electronic expansion valve according to the defrosting signal includes: in response to the second signal, controlling the second four-way valve to be de-energized, the second switching valve to be closed, the second electronic expansion valve to be closed, and the third electronic expansion valve to be opened; or, in response to the second signal, controlling the second four-way valve to be de-energized, the first switching valve to be closed, the second switching valve to be closed, the first electronic expansion valve to be closed, the second electronic expansion valve to be closed, and the third electronic expansion valve to be opened.

[0015] The present application also provides a computer program product, including a computer program / instructions, which when executed by a processor, implement the steps of the defrosting control method of the air conditioner as described in any one of the above.

[0016] The present application also provides an electronic device, which can be an air conditioner. The air conditioner includes a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, it implements the steps of the defrosting control method of the air conditioner as described in any one of the above.

[0017] The present application also provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, it implements the steps of the defrosting control method of the air conditioner as described in any one of the above.

[0018] The air conditioner, the defrosting control method of the air conditioner, and the readable storage medium provided by the present application. The air conditioner includes: an indoor heat exchange unit, a first outdoor heat exchanger and a second outdoor heat exchanger connected in parallel, and a control unit; the indoor heat exchange unit and the first outdoor heat exchanger form a first refrigerant path; the indoor heat exchange unit and the second outdoor heat exchanger form a second refrigerant path; a first four-way valve and a first switching valve are arranged on the first refrigerant path; a second four-way valve and a second switching valve are arranged on the second refrigerant path; a first electronic expansion valve is arranged between the first outdoor heat exchanger and the indoor heat exchange unit; a second electronic expansion valve is arranged between the second outdoor heat exchanger and the indoor heat exchange unit; a third electronic expansion valve is arranged between the first sub-path and the second sub-path; the control unit is used to perform defrosting control on at least one of the first four-way valve, the second four-way valve, the first switching valve, the second switching valve, the first electronic expansion valve, the second electronic expansion valve, and the third electronic expansion valve according to a defrosting signal; wherein, the first sub-path is the refrigerant path between the first outdoor heat exchanger and the first electronic expansion valve; the second sub-path is the refrigerant path between the second outdoor heat exchanger and the second electronic expansion valve. In this way, defrosting can be achieved for the outdoor heat exchange unit while continuously heating through zoned defrosting, and defrosting can be achieved without absorbing indoor heat. Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions in the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1It is a schematic diagram of the operating principle of the air conditioner provided by this application; Figure 2 It is a schematic diagram of the structure of the air conditioner provided by this application; Figure 3 It is a schematic diagram of the control of the air conditioner in the heating mode provided by this application; Figure 4 It is a schematic diagram of the defrosting control for the first outdoor heat exchanger in the continuous heating mode provided by this application; Figure 5 It is a schematic diagram of the defrosting control for the first outdoor heat exchanger in the intermittent heating mode provided by this application; Figure 6 It is a schematic diagram of the defrosting control for the second outdoor heat exchanger in the continuous heating mode provided by this application; Figure 7 It is a schematic diagram of the defrosting control for the second outdoor heat exchanger in the intermittent heating mode provided by this application; Figure 8 It is a schematic diagram of the flow of the defrosting control method of the air conditioner provided by this application; Figure 9 It is a schematic diagram of the structure of the electronic device provided by this application. Detailed Embodiments

[0021] To make the objectives, technical solutions and advantages of this application clearer, the technical solutions in this application will be clearly and completely described below with reference to the accompanying drawings in this application. Obviously, the described embodiments are some but not all of the embodiments of this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts shall fall within the scope of protection of this application.

[0022] The terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of this application can be implemented in an order different from those illustrated or described here, and the objects distinguished by "first", "second", etc. are usually of the same category, and the number of objects is not limited. For example, the first object can be one or multiple. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / " generally means an "or" relationship between the associated objects before and after.

[0023] The following provides a detailed description of the operating principle of the air conditioner involved in the embodiments of this application: As Figure 1As shown in the figure, the compressor compresses the refrigerant, transports it through a pipeline to the condenser, and the high-temperature and high-pressure gaseous refrigerant releases heat in the condenser and becomes a medium-temperature and high-pressure liquid refrigerant. Then, the medium-temperature and high-pressure liquid refrigerant becomes a low-temperature and low-pressure liquid refrigerant after reducing pressure through a capillary tube (throttling unit). The low-temperature and low-pressure liquid refrigerant is transported to the evaporator and evaporates from a liquid to a gas, absorbing a large amount of heat during the evaporation process. Finally, the low-temperature and low-pressure gaseous refrigerant in the evaporator is transported to the compressor and participates in the next cycle. When the air conditioner is cooling, the heat exchanger of the outdoor unit is the condenser, and the heat exchanger of the indoor unit is the evaporator; conversely, when the air conditioner is heating, the heat exchanger of the outdoor unit is the evaporator, and the heat exchanger of the indoor unit is the condenser.

[0024] In view of the above technical problems existing in the related art, the embodiment of the present application provides an air conditioner. By dividing the outdoor heat exchange unit into two or more parts, each heat exchange unit is connected to a four-way valve, and defrosting of the outdoor heat exchange unit is achieved while continuously heating through zoned defrosting. In extremely harsh conditions or when the indoor heating demand is relatively small, the connection between the outdoor and indoor refrigerants can be cut off to achieve defrosting of the system without absorbing indoor heat.

[0025] As Figure 2 shown, it is a schematic structural diagram of the air conditioner provided by the embodiment of the present application. The air conditioner includes: an indoor heat exchange unit, a first outdoor heat exchanger and a second outdoor heat exchanger connected in parallel, and a control unit.

[0026] Exemplarily, the indoor heat exchange unit and the first outdoor heat exchanger form a first refrigerant path; the indoor heat exchange unit and the second outdoor heat exchanger form a second refrigerant path; a first four-way valve and a first switch valve are arranged on the first refrigerant path; a second four-way valve and a second switch valve are arranged on the second refrigerant path; a first electronic expansion valve is arranged between the first outdoor heat exchanger and the indoor heat exchange unit; a second electronic expansion valve is arranged between the second outdoor heat exchanger and the indoor heat exchange unit; a third electronic expansion valve is arranged between the first sub-path and the second sub-path.

[0027] Exemplarily, the control unit is configured to perform defrosting control on at least one of the first four-way valve, the second four-way valve, the first switch valve, the second switch valve, the first electronic expansion valve, the second electronic expansion valve, and the third electronic expansion valve according to a defrosting signal.

[0028] Wherein, the first sub-path is the refrigerant path between the first outdoor heat exchanger and the first electronic expansion valve; the second sub-path is the refrigerant path between the second outdoor heat exchanger and the second electronic expansion valve.

[0029] For example, in the embodiments of the present application, the outdoor heat exchanger is divided into two parts, namely, the first outdoor heat exchanger and the second outdoor heat exchanger. The part connected to the indoor liquid pipe is divided into two paths. One path is connected to the first outdoor heat exchanger through the first electronic expansion valve, and the other part is connected to the second outdoor heat exchange unit through the second electronic expansion valve. A bypass connection is achieved through the third electronic expansion valve between the two parts of the heat exchanger and the electronic expansion valve. The first outdoor heat exchanger is connected to port C of the first four-way valve. Port D of the first four-way valve is connected to the compressor exhaust, port S is connected to the compressor suction port, and port E is connected to the first switch and then to the air pipe, and the air pipe is used to connect to the indoor unit; the second outdoor heat exchanger is connected to port C of the second four-way valve. Port D of the second four-way valve is connected to the compressor exhaust, port S is connected to the compressor suction port, and port E is connected to the first switch and then to the air pipe, and the air pipe is used to connect to the indoor unit; the outdoor system forms relatively independent cycles through the first four-way valve and the second four-way valve respectively, and defrosting of the partition is achieved through the third electronic expansion valve.

[0030] Exemplarily, check valves are provided between the first refrigerant passage and the gas-liquid separator, and between the second refrigerant passage and the gas-liquid separator; the check valves are used to control the one-way flow of the refrigerant from the outdoor heat exchanger to the gas-liquid separator.

[0031] Exemplarily, since the outdoor unit of the air conditioner will frost only in the heating mode, therefore, before defrosting, it is first necessary to control the air conditioner to operate in the heating mode.

[0032] Specifically, the control unit is further configured to, when the air conditioner is operating in the heating mode, control the first four-way valve to be powered on, the second four-way valve to be powered on, the first switching valve to be opened, the second switching valve to be opened, the first electronic expansion valve to be opened, the second electronic expansion valve to be opened, and the third electronic expansion valve to be closed.

[0033] Among them, when the air conditioner is operating in the heating mode, the refrigerant discharged from the compressor passes through the first four-way valve, the first switching valve, the indoor heat exchange unit, the first electronic expansion valve, and the first outdoor heat exchanger, and then returns to the compressor through the gas-liquid separator; when the air conditioner is operating in the heating mode, the refrigerant discharged from the compressor passes through the second four-way valve, the second switching valve, the indoor heat exchange unit, the second electronic expansion valve, and the second outdoor heat exchanger, and then returns to the compressor through the gas-liquid separator.

[0034] Exemplarily, as Figure 3As shown, it is a control schematic diagram of the air conditioner in the heating mode provided by the embodiment of the present application. When the air conditioner is in heating mode, the exhaust gas of the compressor passes through the first four-way valve and the second four-way valve. The first switching valve and the second switching valve are opened, and the high-temperature and high-pressure refrigerant enters the indoor unit. After heat exchange in the indoor unit, it is throttled by the first electronic expansion valve and the second electronic expansion valve and then enters the first outdoor heat exchanger and the second outdoor heat exchanger. After heat exchange, it returns to the compressor suction port through the first four-way valve and the second four-way valve respectively, completing the heating cycle.

[0035] Exemplarily, the defrost signal includes: a first signal for indicating that the first outdoor heat exchanger needs to perform a defrost operation; and a second signal for indicating that the second outdoor heat exchanger needs to perform a defrost operation.

[0036] Exemplarily, in the embodiment of the present application, the defrost control of the outdoor heat exchanger can be divided into defrost control in the continuous heating mode and defrost control in the intermittent mode. The continuous heating mode means that after defrosting, the system needs to resume operation in the heating mode; the intermittent heating mode means that after defrosting, the system stops heating.

[0037] Specifically, in the continuous heating mode, for the defrost control of the first ventilation heat, the control unit is specifically configured to, in response to the first signal, control the first four-way valve to cut off power, the first switching valve to close, the first electronic expansion valve to close, and the third electronic expansion valve to open.

[0038] Exemplarily, as Figure 4 shown, it is a control schematic diagram of defrosting for the first ventilation heat in the continuous heating mode. When the system detects that the first outdoor heat exchanger needs to defrost, it controls the first four-way valve to cut off power. The exhaust gas of the compressor enters the first outdoor heat exchanger through the first four-way valve and is throttled by the third electronic expansion valve and then enters the second outdoor heat exchanger. Another part of the exhaust gas passes through the second four-way valve, the second switching valve is opened, the first switching valve is closed, and the high-temperature and high-pressure refrigerant enters the indoor heat exchange unit. The refrigerant after heat exchange is throttled by the second electronic expansion valve and then converges with the refrigerant throttled by the third electronic expansion valve and enters the second outdoor heat exchanger. After absorbing heat from the second outdoor heat exchanger, it returns to the compressor suction port through the second four-way valve, completing the cycle. In this mode, the unit can complete the defrosting of the first outdoor heat exchanger while continuously heating. After the defrosting is completed, the first four-way valve and the first switching valve return to the heating mode, and the system continues to heat without stopping the compressor during this period.

[0039] Specifically, in the intermittent heating mode, for the defrost control of the first ventilation heat, the control unit is specifically configured to, in response to the first signal, control the first four-way valve to cut off power, the first switching valve to close, the second switching valve to close, the first electronic expansion valve to close, the second electronic expansion valve to close, and the third electronic expansion valve to open.

[0040] Exemplarily, as Figure 5 shown, it is a control schematic diagram for defrosting the first ventilation heat in the intermittent heating mode. When the system detects that the first outdoor heat exchanger needs defrosting, it controls the first four-way valve to cut off power. The exhaust gas of the compressor enters the first outdoor heat exchanger through the first four-way valve and throttles through the third electronic expansion valve into the second outdoor heat exchanger. After the second outdoor heat exchanger absorbs heat, it returns to the suction port of the compressor through the second four-way valve. In this mode, the first switching valve, the second switching valve, the first electronic expansion valve, and the second electronic expansion valve are all closed, cutting off the connection between the indoor and outdoor units to prevent the low-temperature and low-pressure refrigerant from entering the indoor unit to absorb heat and cause the indoor temperature to drop.

[0041] Specifically, in the continuous heating mode, for the defrosting control of the second ventilation heat, the control unit is specifically configured to, in response to the second signal, control the second four-way valve to cut off power, the second switching valve to close, the second electronic expansion valve to close, and the third electronic expansion valve to open.

[0042] Exemplarily, as Figure 6 shown, it is a control schematic diagram for defrosting the second ventilation heat in the continuous heating mode. When the system detects that the second outdoor heat exchanger needs defrosting, it controls the second four-way valve to cut off power. The exhaust gas of the compressor enters the second outdoor heat exchanger through the second four-way valve and throttles through the third electronic expansion valve into the first outdoor heat exchanger. Another part of the exhaust gas enters the indoor side for heat exchange through the first four-way valve, the first switching valve open and the second switching valve closed. The refrigerant after heat exchange throttles through the second electronic expansion valve and converges with the refrigerant throttled by the third electronic expansion valve, enters the first outdoor heat exchanger, and returns to the suction port of the compressor through the first four-way valve after absorbing heat from the first outdoor heat exchanger, completing the cycle. In this mode, the unit can complete the defrosting of the first outdoor heat exchanger while continuously heating. After the defrosting is completed, the first four-way valve and the first switching valve return to the heating mode, and the system continues to heat without stopping the compressor during this period.

[0043] Specifically, in the intermittent heating mode, for the defrosting control of the second ventilation heat, the control unit is specifically configured to, in response to the second signal, control the second four-way valve to cut off power, the second switching valve to close, the second electronic expansion valve to close, and the third electronic expansion valve to open.

[0044] Exemplarily, as Figure 7As shown in the figure, it is a control schematic diagram for defrosting the second ventilation heat in the intermittent heating mode. When the system detects that the second outdoor heat exchanger needs defrosting, it controls the second four-way valve to cut off the power supply. The exhaust gas of the compressor enters the second outdoor heat exchanger through the second four-way valve and throttles through the fifth electronic expansion valve into the first outdoor heat exchanger. After the first outdoor heat exchanger absorbs heat, it returns to the suction port of the compressor through the first four-way valve. In this mode, the first switching valve, the second switching valve, the first electronic expansion valve, and the second electronic expansion valve are all closed, cutting off the connection between the indoor and outdoor units to avoid the low-temperature and low-pressure refrigerant entering the indoor unit to absorb heat and causing the indoor temperature to drop.

[0045] The air conditioner provided by the embodiment of the present application includes: an indoor heat exchange unit, a first outdoor heat exchanger and a second outdoor heat exchanger connected in parallel, and a control unit; the indoor heat exchange unit and the first outdoor heat exchanger form a first refrigerant path; the indoor heat exchange unit and the second outdoor heat exchanger form a second refrigerant path; a first four-way valve and a first switching valve are arranged on the first refrigerant path; a second four-way valve and a second switching valve are arranged on the second refrigerant path; a first electronic expansion valve is arranged between the first outdoor heat exchanger and the indoor heat exchange unit; a second electronic expansion valve is arranged between the second outdoor heat exchanger and the indoor heat exchange unit; a third electronic expansion valve is arranged between the first sub-path and the second sub-path; the control unit is configured to perform defrosting control on at least one of the first four-way valve, the second four-way valve, the first switching valve, the second switching valve, the first electronic expansion valve, the second electronic expansion valve, and the third electronic expansion valve according to a defrosting signal; wherein, the first sub-path is the refrigerant path between the first outdoor heat exchanger and the first electronic expansion valve; the second sub-path is the refrigerant path between the second outdoor heat exchanger and the second electronic expansion valve. In this way, continuous heating can be achieved through zoned defrosting while defrosting the outdoor heat exchange unit, and defrosting can be realized without absorbing indoor heat.

[0046] The following combines the accompanying drawings to explain in detail the air conditioner defrosting control method provided by the embodiment of the present application through specific embodiments and their application scenarios.

[0047] As Figure 8 shown, an air conditioner defrosting control method provided by the embodiment of the present application may include the following steps 801 and 802: Step 801, when the air conditioner is operating in the heating mode, receive a defrosting signal.

[0048] Step 802: Perform defrosting control on the first four-way valve, and / or the second four-way valve, and / or the first switching valve, and / or the second switching valve, and / or the first electronic expansion valve, and / or the second electronic expansion valve, and / or the third electronic expansion valve according to the defrosting signal.

[0049] Wherein, the first sub-path is the refrigerant path between the first outdoor heat exchanger and the first electronic expansion valve; the second sub-path is the refrigerant path between the second outdoor heat exchanger and the second electronic expansion valve.

[0050] Optionally, before the above step 802, the air conditioner defrosting control method provided by the embodiments of the present application may further include the following step 803: Step 803: When the air conditioner is operating in the heating mode, control the first four-way valve to be energized, the second four-way valve to be energized, the first switching valve to be opened, the second switching valve to be opened, the first electronic expansion valve to be opened, the second electronic expansion valve to be opened, and the third electronic expansion valve to be closed.

[0051] Wherein, when the air conditioner is operating in the heating mode, the refrigerant discharged from the compressor passes through the first four-way valve, the first switching valve, the indoor heat exchange unit, the first electronic expansion valve, and the first outdoor heat exchanger, and then returns to the compressor through the gas-liquid separator; when the air conditioner is operating in the heating mode, the refrigerant discharged from the compressor passes through the second four-way valve, the second switching valve, the indoor heat exchange unit, the second electronic expansion valve, and the second outdoor heat exchanger, and then returns to the compressor through the gas-liquid separator.

[0052] Specifically, in the above step 802, the steps for defrosting the first outdoor heat exchanger may further include the following step 802a1 or step 802a2: Step 802a1: In response to the first signal, control the first four-way valve to be de-energized, the first switching valve to be closed, the first electronic expansion valve to be closed, and the third electronic expansion valve to be opened.

[0053] Step 802a2: In response to the first signal, control the first four-way valve to be de-energized, the first switching valve to be closed, the second switching valve to be closed, the first electronic expansion valve to be closed, the second electronic expansion valve to be closed, and the third electronic expansion valve to be opened.

[0054] Specifically, in the above step 802, the steps for defrosting the second outdoor heat exchanger may further include the following step 802b1 or step 802b2: Step 802b1: In response to the second signal, control the second four-way valve to de-energize, the second switching valve to close, the second electronic expansion valve to close, and the third electronic expansion valve to open.

[0055] Step 802b2: In response to the second signal, control the second four-way valve to de-energize, the first switching valve to close, the second switching valve to close, the first electronic expansion valve to close, the second electronic expansion valve to close, and the third electronic expansion valve to open.

[0056] It should be noted that the control principle and achieved technical effects of the air conditioner in the above method steps have been described in detail in the above part regarding the air conditioner. To avoid repetition, they will not be elaborated here.

[0057] The defrosting control method for the air conditioner provided by the embodiment of the present application is used to perform defrosting control on at least one of the first four-way valve, the second four-way valve, the first switching valve, the second switching valve, the first electronic expansion valve, the second electronic expansion valve, and the third electronic expansion valve according to a defrosting signal; wherein, the first sub-path is the refrigerant path between the first outdoor heat exchanger and the first electronic expansion valve; the second sub-path is the refrigerant path between the second outdoor heat exchanger and the second electronic expansion valve. In this way, continuous heating can be achieved through zoned defrosting while defrosting the outdoor heat exchange unit, enabling the system to defrost without absorbing indoor heat.

[0058] Figure 9 An example of a schematic physical structure diagram of an electronic device is shown. This electronic device can be the above-mentioned air conditioner, such as Figure 9 As shown, the electronic device may include: a processor 910, a communication interface 920, a memory 930, and a communication bus 940. Among them, the processor 910, the communication interface 920, and the memory 930 communicate with each other through the communication bus 940. The processor 910 can call the logical instructions in the memory 930 to execute the defrosting control method for the air conditioner, and this method includes: performing defrosting control on the first four-way valve, and / or, the second four-way valve, and / or, the first switching valve, and / or, the second switching valve, and / or, the first electronic expansion valve, and / or, the second electronic expansion valve, and / or, the third electronic expansion valve according to the defrosting signal; wherein, the first sub-path is the refrigerant path between the first outdoor heat exchanger and the first electronic expansion valve; the second sub-path is the refrigerant path between the second outdoor heat exchanger and the second electronic expansion valve.

[0059] In addition, when the logical instructions in the above-mentioned memory 930 are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: various media that can store program codes, such as USB flash drives, mobile hard disks, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks, or optical discs.

[0060] On the other hand, the present application also provides a computer program product. The computer program product includes a computer program stored on a computer-readable storage medium. The computer program includes program instructions. When the program instructions are executed by a computer, the computer can execute the air conditioner defrosting control method provided by the above-mentioned various methods. The method includes: performing defrosting control on the first four-way valve, and / or the second four-way valve, and / or the first switching valve, and / or the second switching valve, and / or the first electronic expansion valve, and / or the second electronic expansion valve, and / or the third electronic expansion valve according to the defrosting signal; wherein, the first sub-path is the refrigerant path between the first outdoor heat exchanger and the first electronic expansion valve; the second sub-path is the refrigerant path between the second outdoor heat exchanger and the second electronic expansion valve.

[0061] In yet another aspect, the present application also provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, it is configured to execute the air conditioner defrosting control method provided by the above-mentioned various methods. The method includes: performing defrosting control on the first four-way valve, and / or the second four-way valve, and / or the first switching valve, and / or the second switching valve, and / or the first electronic expansion valve, and / or the second electronic expansion valve, and / or the third electronic expansion valve according to the defrosting signal; wherein, the first sub-path is the refrigerant path between the first outdoor heat exchanger and the first electronic expansion valve; the second sub-path is the refrigerant path between the second outdoor heat exchanger and the second electronic expansion valve.

[0062] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on such an understanding, the essence of the above technical solution, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An air conditioner, characterized in that, Comprising: An indoor heat exchange unit, a first outdoor heat exchanger and a second outdoor heat exchanger connected in parallel, and a control unit; The indoor heat exchange unit and the first outdoor heat exchanger form a first refrigerant path; the indoor heat exchange unit and the second outdoor heat exchanger form a second refrigerant path; a first four-way valve and a first switching valve are arranged on the first refrigerant path; a second four-way valve and a second switching valve are arranged on the second refrigerant path; a first electronic expansion valve is arranged between the first outdoor heat exchanger and the indoor heat exchange unit; a second electronic expansion valve is arranged between the second outdoor heat exchanger and the indoor heat exchange unit; a third electronic expansion valve is arranged between the first sub-path and the second sub-path; The control unit is configured to perform defrosting control on at least one of the first four-way valve, the second four-way valve, the first switching valve, the second switching valve, the first electronic expansion valve, the second electronic expansion valve, and the third electronic expansion valve according to a defrosting signal; Wherein, the first sub-path is a refrigerant path between the first outdoor heat exchanger and the first electronic expansion valve; the second sub-path is a refrigerant path between the second outdoor heat exchanger and the second electronic expansion valve.

2. The method according to claim 1, wherein One-way valves are arranged between the first refrigerant path and the gas-liquid separator, and between the second refrigerant path and the gas-liquid separator; the one-way valves are used to control the one-way flow of refrigerant from the outdoor heat exchanger to the gas-liquid separator.

3. The method according to claim 1 or 2, wherein The control unit is further configured to, when the air conditioner is operating in the heating mode, control the first four-way valve to be energized, the second four-way valve to be energized, the first switching valve to be opened, the second switching valve to be opened, the first electronic expansion valve to be opened, the second electronic expansion valve to be opened, and the third electronic expansion valve to be closed; Wherein, when the air conditioner is operating in the heating mode, the refrigerant discharged from the compressor passes through the first four-way valve, the first switching valve, the indoor heat exchange unit, the first electronic expansion valve, the first outdoor heat exchanger, and then returns to the compressor through the gas-liquid separator; when the air conditioner is operating in the heating mode, the refrigerant discharged from the compressor passes through the second four-way valve, the second switching valve, the indoor heat exchange unit, the second electronic expansion valve, the second outdoor heat exchanger, and then returns to the compressor through the gas-liquid separator.

4. The method according to claim 3, wherein The defrosting signal includes: a first signal for indicating that the first outdoor heat exchanger needs to perform a defrosting operation; The control unit is specifically configured to, in response to the first signal, control the first four-way valve to be de-energized, the first switching valve to be closed, the first electronic expansion valve to be closed, and the third electronic expansion valve to be opened; Or, The control unit is specifically configured to, in response to the first signal, control the first four-way valve to be de-energized, the first switching valve to be closed, the second switching valve to be closed, the first electronic expansion valve to be closed, the second electronic expansion valve to be closed, and the third electronic expansion valve to be opened.

5. The method according to claim 3, characterized in that, The defrosting signal includes: a second signal for indicating that the second outdoor heat exchanger needs to perform a defrosting operation; The control unit is specifically configured to, in response to the second signal, control the second four-way valve to de-energize, the second switching valve to close, the second electronic expansion valve to close, and the third electronic expansion valve to open; Or, The control unit is specifically configured to, in response to the second signal, control the second four-way valve to de-energize, the first switching valve to close, the second switching valve to close, the first electronic expansion valve to close, the second electronic expansion valve to close, and the third electronic expansion valve to open.

6. A defrosting control method for an air conditioner, characterized in that, Applied to the control unit of an air conditioner, the air conditioner further includes: an indoor heat exchange unit, a first outdoor heat exchanger and a second outdoor heat exchanger connected in parallel; the indoor heat exchange unit and the first outdoor heat exchanger form a first refrigerant path; the indoor heat exchange unit and the second outdoor heat exchanger form a second refrigerant path; a first four-way valve and a first switching valve are provided on the first refrigerant path; a second four-way valve and a second switching valve are provided on the second refrigerant path; a first electronic expansion valve is provided between the first outdoor heat exchanger and the indoor heat exchange unit; a second electronic expansion valve is provided between the second outdoor heat exchanger and the indoor heat exchange unit; a third electronic expansion valve is provided between the first sub-path and the second sub-path; The method includes: When the air conditioner is operating in the heating mode, receiving a defrosting signal; Performing defrosting control on at least one of the first four-way valve, and / or the second four-way valve, and / or the first switching valve, and / or the second switching valve, and / or the first electronic expansion valve, and / or the second electronic expansion valve, and / or the third electronic expansion valve according to the defrosting signal; Wherein, the first sub-path is the refrigerant path between the first outdoor heat exchanger and the first electronic expansion valve; the second sub-path is the refrigerant path between the second outdoor heat exchanger and the second electronic expansion valve.

7. The method according to claim 6, wherein Before performing defrosting control on at least one of the first four-way valve, the second four-way valve, the first switching valve, the second switching valve, the first electronic expansion valve, the second electronic expansion valve, and the third electronic expansion valve according to the defrosting signal, the method further includes: When the air conditioner is operating in the heating mode, controlling the first four-way valve to be energized, the second four-way valve to be energized, the first switching valve to open, the second switching valve to open, the first electronic expansion valve to open, the second electronic expansion valve to open, and the third electronic expansion valve to close; Wherein, when the air conditioner operates in the heating mode, the refrigerant discharged from the compressor passes through the first four-way valve, the first switching valve, the indoor heat exchange unit, the first electronic expansion valve, and the first outdoor heat exchanger, and then returns to the compressor through the gas-liquid separator; when the air conditioner operates in the heating mode, the refrigerant discharged from the compressor passes through the second four-way valve, the second switching valve, the indoor heat exchange unit, the second electronic expansion valve, and the second outdoor heat exchanger, and then returns to the compressor through the gas-liquid separator.

8. The method according to claim 7, wherein The defrosting signal includes: a first signal for indicating that the first outdoor heat exchanger needs to perform a defrosting operation; The defrosting control of at least one of the first four-way valve, the second four-way valve, the first switching valve, the second switching valve, the first electronic expansion valve, the second electronic expansion valve, and the third electronic expansion valve according to the defrosting signal includes: In response to the first signal, controlling the first four-way valve to be powered off, the first switching valve to be closed, the first electronic expansion valve to be closed, and the third electronic expansion valve to be opened; Or, In response to the first signal, controlling the first four-way valve to be powered off, the first switching valve to be closed, the second switching valve to be closed, the first electronic expansion valve to be closed, the second electronic expansion valve to be closed, and the third electronic expansion valve to be opened.

9. The method according to claim 7, wherein The defrosting signal includes: a second signal for indicating that the first outdoor heat exchanger needs to perform a defrosting operation; The defrosting control of at least one of the first four-way valve, the second four-way valve, the first switching valve, the second switching valve, the first electronic expansion valve, the second electronic expansion valve, and the third electronic expansion valve according to the defrosting signal includes: In response to the second signal, controlling the second four-way valve to be powered off, the second switching valve to be closed, the second electronic expansion valve to be closed, and the third electronic expansion valve to be opened; Or, In response to the second signal, controlling the second four-way valve to be powered off, the first switching valve to be closed, the second switching valve to be closed, the first electronic expansion valve to be closed, the second electronic expansion valve to be closed, and the third electronic expansion valve to be opened.

10. A computer-readable storage medium, characterized in that, A computer program is stored thereon, and when the computer program is executed by a processor, the steps of the air conditioner defrosting control method according to any one of claims 6 to 9 are implemented.

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