Reversing control method for four-way valve of air conditioner, air conditioning system and electronic equipment

Abstract

The embodiment of the invention relates to an air conditioner four-way valve reversing control method, an air conditioner system and electronic equipment. The method comprises the steps that the air conditioner system is controlled to enter a preset temperature control mode; induction signals collected by at least one sensor in the air conditioning system are obtained; determining whether a four-way valve in the air conditioning system meets a power-on condition or not based on the induction signal; if the power-on condition is met, a four-way valve is controlled to be powered on, a first electromagnetic valve connected with the four-way valve is controlled to be opened, and a refrigerant in the air conditioning system flows into the four-way valve through the first electromagnetic valve; based on the induction signal, whether reversing of the four-way valve is normal or not is determined; if reversing of the four-way valve is normal, the first electromagnetic valve is closed. According to the embodiment of the invention, after the air conditioner enters the preset temperature control mode, the four-way valve and the first electromagnetic valve are opened at the same time, larger impact force is provided for the four-way valve, the four-way valve is assisted in reversing, the reversing stability of the four-way valve is improved, and abnormal operation of the air conditioner caused by reversing faults of the four-way valve is prevented.

Description

Technical Field

[0001] This application relates to the technical field of air conditioners, and particularly to a method for controlling the reversing of an air conditioner four-way valve, an air conditioning system, and an electronic device. Background Art

[0002] The four-way valve is one of the important components of an air conditioning system. For example, in most air conditioner heat pump systems, the four-way valve is used to switch between the cooling mode and the heating mode to meet the requirements of users for indoor temperature in different seasons.

[0003] In the existing air conditioning system, the four-way valve reverses when starting and stopping. The size of the four-way valve of the air conditioner unit is relatively large, and the resistance during reversing is relatively large. It is easy for the four-way valve to fail to reverse in place during low-pressure difference operation, resulting in gas leakage during the operation of the unit. At the same time, the unit is prone to frosting in winter, and the four-way valve needs to reverse frequently when the unit switches to the defrosting mode. After long-term use, the four-way valve may be worn and stuck during reversing, resulting in abnormal operation of the unit. Summary of the Invention

[0004] In view of this, to solve the above-mentioned partial or all technical problems, embodiments of this application provide a method for controlling the reversing of an air conditioner four-way valve, an air conditioning system, and an electronic device.

[0005] In a first aspect, embodiments of this application provide a method for controlling the reversing of an air conditioner four-way valve, the method including: controlling the air conditioning system to enter a preset temperature control mode; obtaining sensing signals collected by at least one sensor in the air conditioning system; based on the sensing signals, determining whether the four-way valve in the air conditioning system meets the energization condition; if it meets the energization condition, controlling the four-way valve to be energized, and controlling the first electromagnetic valve connected to the four-way valve to open, so that the refrigerant in the air conditioning system flows into the four-way valve through the first electromagnetic valve; based on the sensing signals, determining whether the four-way valve reverses normally; if the four-way valve reverses normally, closing the first electromagnetic valve.

[0006] In a possible implementation manner, determining whether the four-way valve reverses normally based on the sensing signals includes: after a first preset time period after the four-way valve is energized, based on the sensing signals, determining the refrigerant pressure difference of the compressor in the air conditioning system, where the refrigerant pressure difference is the difference between the pressure value at the exhaust port of the compressor and the pressure value at the intake port; determining whether the refrigerant pressure difference is greater than or equal to a first preset pressure difference threshold; if the refrigerant pressure difference is greater than or equal to the first preset pressure difference threshold, after a second preset time period, based on the sensing signals, determining the temperature difference between the condensation temperature and the evaporation temperature of the air conditioning system; determining whether the temperature difference is greater than or equal to a preset temperature difference threshold, and whether the evaporation temperature of the air conditioning system is less than or equal to a preset temperature; if the temperature difference is greater than or equal to the preset temperature difference threshold and the evaporation temperature is less than or equal to the preset temperature, determining that the four-way valve reverses normally.

[0007] In a possible implementation, after determining whether the refrigerant pressure difference is greater than or equal to the first preset pressure difference threshold, the method further includes: if the refrigerant pressure difference is less than the preset pressure difference threshold, based on the induction signal, determining whether the temperature of the target heat exchanger in the air-conditioning system is within the preset temperature range, and determining whether the pressure value at the inlet of the compressor is within the preset pressure value range; if the temperature of the target heat exchanger is within the preset temperature range and the pressure value at the inlet of the compressor is within the preset pressure value range, determining that the four-way valve has abnormal commutation.

[0008] In a possible implementation, after determining whether the four-way valve has normal commutation based on the induction signal, the method further includes: if the four-way valve has abnormal commutation, perform the following fault repair operations: control the compressor to keep running, control the four-way valve to be powered off and the first solenoid valve to be closed, after a third preset duration, then control the four-way valve to be powered on and the first solenoid valve to be opened, after a fourth preset duration, perform the fault repair operations again; if the number of executions of the fault repair operations reaches the first preset number, record the number of abnormal commutations of the four-way valve; if the number of abnormal commutations of the four-way valve does not reach the second preset number, re-execute the step of controlling the air-conditioning system to enter the preset temperature control mode; if the number of abnormal commutations of the four-way valve reaches the second preset number, control the air-conditioning system to stop.

[0009] In a possible implementation, the method further includes: if the number of abnormal commutations of the four-way valve reaches the second preset number and the refrigerant pressure difference of the compressor in the air-conditioning system detected most recently is less than the second preset pressure difference threshold, output a prompt message for prompting that the four-way valve has a gas leakage fault.

[0010] In a possible implementation, after closing the first solenoid valve if the four-way valve has normal commutation, the method further includes: in response to the air-conditioning system exiting the preset temperature control mode, control the four-way valve to be powered off, and control the second solenoid valve connected to the four-way valve to be opened, so that the refrigerant in the air-conditioning system flows into the four-way valve through the second solenoid valve; after a fifth preset duration after the four-way valve is powered off, control the compressor to stop running, and control the second solenoid valve to be closed.

[0011] In a possible implementation manner, determining whether a four-way valve in an air-conditioning system meets the energization condition based on an induction signal includes: after a sixth preset time period has elapsed since entering a preset temperature control mode, determining the refrigerant pressure difference of a compressor in the air-conditioning system based on the induction signal; determining whether the refrigerant pressure difference is greater than or equal to a third preset pressure difference threshold; if the refrigerant pressure difference is greater than or equal to the third preset pressure difference threshold, determining that the four-way valve meets the energization condition; if the refrigerant pressure difference is less than the third preset pressure difference threshold, determining whether the operating time of the compressor in the air-conditioning system since entering the preset temperature control mode is greater than or equal to a seventh preset time period; if it is greater than or equal to the seventh preset time period, determining that the four-way valve meets the energization condition; if it is less than the seventh preset time period, re-executing the step of determining whether the refrigerant pressure difference is greater than or equal to the third preset pressure difference threshold.

[0012] In a possible implementation manner, the method further includes: when the air-conditioning system is in a stopped state, in response to the current time reaching the four-way valve cleaning time, controlling a cleaning device in the air-conditioning system to spray a cleaning liquid into the four-way valve based on preset cleaning parameters to clean the inside of the four-way valve.

[0013] In a second aspect, an embodiment of the present application provides an air-conditioning system, including: a controller, at least one sensor, a four-way valve, a first solenoid valve, a compressor, a first heat exchanger, and a second heat exchanger, where at least one sensor, the four-way valve, and the first solenoid valve are all electrically connected to the controller;

[0014] The compressor, the four-way valve, the first heat exchanger, a check valve, and the second heat exchanger are sequentially connected through refrigerant pipes, and the second heat exchanger is connected to the four-way valve through a refrigerant pipe; the first solenoid valve is connected to the four-way valve and the compressor through a refrigerant pipe; the controller is configured to execute the air-conditioning four-way valve commutation control method in the first aspect above.

[0015] In a possible implementation manner, at least one sensor includes a first pressure sensor, a second pressure sensor, a first temperature sensor, and a second temperature sensor; the first pressure sensor is used to detect the pressure value at the exhaust port of the compressor, and the second pressure sensor is used to detect the pressure value at the intake port of the compressor; the first temperature sensor is used to detect the condensation temperature of the refrigerant in the system, and the second temperature sensor is used to detect the evaporation temperature of the refrigerant in the system.

[0016] In a possible implementation manner, the system further includes a second solenoid valve; the second solenoid valve is electrically connected to the controller and is connected to the four-way valve and the compressor through a refrigerant pipe.

[0017] In a possible implementation, the system further includes a cleaning device, which includes a liquid storage tank, a recovery tank, a water pump, and a stop valve; both the water pump and the stop valve are electrically connected to the controller; the liquid storage tank, the water pump, the stop valve, the four-way valve, and the recovery tank are sequentially connected through a cleaning liquid pipeline. In a possible implementation,

[0018] In a third aspect, an embodiment of the present application provides an electronic device, including: a memory for storing a computer program; a processor for executing the computer program stored in the memory, and when the computer program is executed, implementing the method of any one of the embodiments of the air-conditioning four-way valve commutation control method in the first aspect of the present application.

[0019] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, implementing the method of any one of the embodiments of the air-conditioning four-way valve commutation control method in the first aspect as described above.

[0020] In a fifth aspect, an embodiment of the present application provides a computer program, which includes computer-readable code, and when the computer-readable code runs on a device, enabling the processor in the device to implement the method of any one of the embodiments of the air-conditioning four-way valve commutation control method in the first aspect as described above.

[0021] The air-conditioning four-way valve commutation control method, air-conditioning system, and electronic device provided by the embodiments of the present application, after the air-conditioning system enters the preset temperature control mode, determine whether the four-way valve meets the energization condition based on the induction signal collected by the sensor in the air-conditioning system. If it meets the condition, control the four-way valve to be energized, and control the first solenoid valve connected to the four-way valve to open, so that the refrigerant in the air-conditioning system flows into the four-way valve through the first solenoid valve. Then, based on the induction signal, determine whether the four-way valve commutes normally. If it is normal, close the first solenoid valve. The embodiments of the present application realize that after entering the preset temperature control mode, the four-way valve and the first solenoid valve are opened simultaneously. The first solenoid valve allows the refrigerant in the air-conditioning refrigerant pipeline to flow into the four-way valve, providing a greater impact force for the four-way valve to assist the four-way valve in commuting, improving the stability of the four-way valve commutation, and preventing abnormal operation of the air-conditioning caused by four-way valve commutation failure. Description of the Drawings

[0022] The drawings here are incorporated into the specification and constitute a part of this specification, showing embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application.

[0023] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0024] One or more embodiments are illustrated by way of example in the accompanying drawings, which do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements, and the drawings in the accompanying drawings do not constitute a scale limitation unless otherwise stated.

[0025] Figure 1 It is a schematic flow chart of a method for controlling the commutation of an air-conditioning four-way valve provided by an embodiment of the present application;

[0026] Figure 2 It is a schematic flow chart of another method for controlling the commutation of an air-conditioning four-way valve provided by an embodiment of the present application;

[0027] Figure 3 It is a schematic flow chart of yet another method for controlling the commutation of an air-conditioning four-way valve provided by an embodiment of the present application;

[0028] Figure 4 It is a schematic flow chart of yet another method for controlling the commutation of an air-conditioning four-way valve provided by an embodiment of the present application;

[0029] Figure 5 It is a schematic flow chart of yet another method for controlling the commutation of an air-conditioning four-way valve provided by an embodiment of the present application;

[0030] Figure 6 It is a schematic flow chart of yet another method for controlling the commutation of an air-conditioning four-way valve provided by an embodiment of the present application;

[0031] Figure 7 It is a schematic flow chart of yet another method for controlling the commutation of an air-conditioning four-way valve provided by an embodiment of the present application;

[0032] Figure 8 It is a schematic structural diagram of an air-conditioning four-way valve commutation control device provided by an embodiment of the present application;

[0033] Figure 9 It is a schematic structural diagram of an air-conditioning system provided by an embodiment of the present application;

[0034] Figure 10 It is a schematic structural diagram of another air-conditioning system provided by an embodiment of the present application;

[0035] Figure 11A 、 Figure 11B It is a schematic connection diagram of a first electromagnetic valve, a second electromagnetic valve and a four-way valve provided by an embodiment of the present application;

[0036] Figure 12 It is a schematic structural diagram of yet another air-conditioning system provided by an embodiment of the present application;

[0037] Figure 13 It is a schematic structural diagram of a cleaning device provided by an embodiment of the present application;

[0038] Figure 14 This is a schematic structural diagram of an electronic device provided by an embodiment of the present application. Detailed implementation manners

[0039] Now, various exemplary embodiments of the present application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. It should be noted that: unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and values set forth in these embodiments do not limit the scope of the present application.

[0040] Those skilled in the art can understand that terms such as "first" and "second" in the embodiments of the present application are only used to distinguish different steps, devices or modules, etc., without representing any specific technical meaning, nor indicating the logical order between them.

[0041] It should also be understood that in this embodiment, "a plurality of" may refer to two or more, and "at least one" may refer to one, two or more.

[0042] It should also be understood that for any component, data or structure mentioned in the embodiments of the present application, without clear limitation or contrary indication in the context, it can generally be understood as one or more.

[0043] In addition, the term "and / or" in the present application is merely a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in the present application generally represents an "or" relationship between the associated objects before and after.

[0044] It should also be understood that the description of each embodiment of the present application emphasizes the differences between the embodiments, and the same or similar parts can be referred to each other. For the sake of brevity, they will not be described one by one.

[0045] The following description of at least one exemplary embodiment is actually only illustrative and in no way restricts the present application and its application or use.

[0046] For technologies, circuits and devices known to those of ordinary skill in the relevant art, detailed discussion may not be made, but where appropriate, the above technologies, circuits and devices should be regarded as part of the specification.

[0047] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0048] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. For the convenience of understanding the embodiments of the present application, the present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts belong to the scope of protection of the present application.

[0049] In order to solve the technical problem that the four-way valve in the existing air-conditioning system is prone to commutation failure during commutation, the present application provides a method for controlling the commutation of an air-conditioning four-way valve, which can increase the amount of refrigerant flowing into the four-way valve during the commutation of the four-way valve, provide an additional impact force for the four-way valve, and prevent the four-way valve from jamming and other failures.

[0050] Figure 1 It is a schematic flow chart of a method for controlling the commutation of an air-conditioning four-way valve provided by an embodiment of the present application. This method can be applied to an air-conditioning system and can be executed by a controller in the control system. This method can also be executed by other electronic devices connected to the air-conditioning system, such as one or more electronic devices such as a smart phone, a tablet computer, and a personal computer. In addition, the execution subject of this method can be hardware or software. When the above execution subject is hardware, the execution subject can be one or more of the above electronic devices. For example, a single electronic device can execute this method, or multiple electronic devices can cooperate with each other to execute this method. When the above execution subject is software, this method can be implemented as multiple software or software modules, or can be implemented as a single software or software module. No specific limitation is made here.

[0051] As Figure 1 shown, the method specifically includes:

[0052] Step 101, control the air-conditioning system to enter a preset temperature control mode.

[0053] In some embodiments, the preset temperature control mode is the temperature control mode in which the air-conditioning system is located when this method is executed. For example, usually the preset temperature control mode can be the heating mode. Optionally, the preset temperature control mode can also be other modes such as the cooling mode. The electronic device executing this method can control the air-conditioning system to enter the preset temperature control mode according to the instruction input by the user; or automatically control the air-conditioning system to enter the preset temperature control mode according to the preset trigger condition.

[0054] Step 102, obtain the sensing signals collected by at least one sensor in the air-conditioning system.

[0055] In some embodiments, the types of the at least one sensor may include but are not limited to at least one of the following: a pressure sensor, a temperature sensor, etc. The at least one sensor may be disposed at various locations in the air conditioning system, such as at the inlet and outlet of the compressor, inside the heat exchanger, etc.

[0056] Step 103, based on the induction signal, determine whether the four-way valve in the air conditioning system meets the energization condition.

[0057] In some embodiments, the above-mentioned energization condition may be the environmental condition that must be satisfied for the four-way valve to be energized. For example, if it is determined according to the induction signal that the pressure difference between the inlet and outlet of the compressor (i.e., the high and low refrigerant pressure difference) is greater than the preset pressure difference threshold, it is determined that the four-way valve meets the energization condition.

[0058] Step 104, if the energization condition is met, control the four-way valve to be energized, and control the first solenoid valve connected to the four-way valve to open, so that the refrigerant in the air conditioning system flows into the four-way valve through the first solenoid valve.

[0059] In some embodiments, one end of the first solenoid valve is connected to the four-way valve, and the other end is connected to the refrigerant pipeline. Generally, to increase the impact force of the refrigerant flowing into the four-way valve, the first solenoid valve may be disposed between the four-way valve and the compressor, that is, the first solenoid valve is connected to the four-way valve and the compressor through the refrigerant pipeline, and the high-pressure refrigerant at the exhaust port of the compressor flows into the four-way valve through the first solenoid valve. The interface of the first solenoid valve may be connected to the internal pipeline of the four-way valve in the energized state, so that when the four-way valve is energized, the refrigerant can flow into the four-way valve and flow out through the internal pipeline of the four-way valve.

[0060] When the four-way valve is energized, the commutation device inside the four-way valve will act, and the flow direction of the refrigerant will change after passing through the four-way valve. At this time, the first solenoid valve is opened to provide a greater driving force for the commutation device inside the four-way valve to assist the four-way valve in commutation.

[0061] Step 105, based on the induction signal, determine whether the four-way valve commutes normally.

[0062] In some embodiments, the environment of the air conditioning system can be monitored according to the induction signal collected in real time. When the monitored environmental conditions meet the preset conditions, it can be determined that the four-way valve commutes normally. For example, the induction signal may include the condensation temperature and evaporation temperature collected from the condenser and evaporator in the air conditioning system. If the temperature difference between the condensation temperature and the evaporation temperature is greater than the preset temperature difference threshold, it means that the air conditioning system operates normally in the above-mentioned preset temperature control mode, and at this time, it is determined that the four-way valve commutes normally.

[0063] Step 106, if the four-way valve commutes normally, close the first solenoid valve.

[0064] In some embodiments, after determining that the four-way valve has switched directions properly, it indicates that the air-conditioning system is operating normally in the above-mentioned preset temperature control mode. At this time, the first solenoid valve can be controlled to close, and no additional refrigerant flow is provided to the four-way valve.

[0065] The four-way valve switching control method for an air conditioner provided by the embodiments of the present application determines whether the four-way valve meets the energization condition based on the induction signal collected by the sensors in the air-conditioning system after the air-conditioning system enters the preset temperature control mode. If it meets the condition, the four-way valve is controlled to be energized, and the first solenoid valve connected to the four-way valve is controlled to open, so that the refrigerant in the air-conditioning system flows into the four-way valve through the first solenoid valve. Then, based on the induction signal, it is determined whether the four-way valve has switched directions properly. If it is normal, the first solenoid valve is closed. The embodiments of the present application achieve that after entering the preset temperature control mode, the four-way valve and the first solenoid valve are opened simultaneously. The first solenoid valve allows the refrigerant in the air-conditioning refrigerant pipeline to flow into the four-way valve, providing a greater impact force for the four-way valve to assist in switching directions, improving the stability of the four-way valve switching, and preventing abnormal operation of the air conditioner caused by four-way valve switching failures.

[0066] In some alternative implementation manners, as Figure 2 shown, step 105 includes:

[0067] Step 1051, after the four-way valve is energized for a first preset duration, based on the induction signal, determine the refrigerant pressure difference of the compressor in the air-conditioning system.

[0068] Among them, the first preset duration is represented as t1, which can be set according to actual needs, such as 5 s. That is, after the four-way valve is energized, wait for a period of time to ensure the normal operation of the compressor. The refrigerant pressure difference is the difference between the pressure value at the exhaust port and the pressure value at the intake port of the compressor. That is, the induction signal includes the pressure signals collected by the pressure sensors at two positions, the exhaust port and the intake port of the compressor. According to this pressure signal, the refrigerant pressure difference (or the high and low refrigerant pressure difference of the air-conditioning system) can be calculated, which is represented as ΔP here.

[0069] Step 1052, determine whether the refrigerant pressure difference is greater than or equal to a first preset pressure difference threshold.

[0070] Among them, the first preset pressure difference threshold can be set according to actual needs, which is represented as P1 here.

[0071] Step 1053, if the refrigerant pressure difference is greater than or equal to the first preset pressure difference threshold, after a second preset duration, based on the induction signal, determine the temperature difference between the condensation temperature and the evaporation temperature of the air-conditioning system.

[0072] The above-mentioned second preset duration is denoted as t2, and the above-mentioned preset temperature is denoted as T0, both of which can be set according to requirements, for example, 5s. The above-mentioned induction signal may include the condensation temperature and evaporation temperature collected in real time by temperature sensors arranged on the condenser and evaporator. Furthermore, the electronic device can calculate the temperature difference, which is denoted as ΔT here. Then, it is judged

[0073] Step 1054, determine whether the temperature difference is greater than or equal to the preset temperature difference threshold, and whether the evaporation temperature of the air-conditioning system is less than or equal to the preset temperature.

[0074] The preset temperature difference threshold can be set according to actual requirements, which is denoted as T1 here.

[0075] Step 1055, if the temperature difference is greater than or equal to the preset temperature difference threshold and the evaporation temperature is less than or equal to the preset temperature, determine that the four-way valve commutation is normal.

[0076] That is, if ΔP≥P1, after a duration of t2, if ΔT≥T1 and the evaporation temperature ≤T0, then it is judged that the four-way valve commutation is normal.

[0077] In this embodiment, by judging the high and low pressure difference of the refrigerant in the air-conditioning system and judging the evaporation and condensation temperatures, it can be more accurately judged whether the air-conditioning system is operating normally in the preset temperature control mode, and thus it can be more accurately judged whether the four-way valve commutation is normal.

[0078] In some alternative implementation manners, as Figure 3 shown, after step 1052, the method further includes:

[0079] Step 1056, if the refrigerant pressure difference is less than the preset pressure difference threshold, based on the induction signal, determine whether the temperature of the target heat exchanger in the air-conditioning system is within the preset temperature range, and determine whether the pressure value at the inlet of the compressor is within the preset pressure value range.

[0080] In an application scenario, if the preset temperature control mode is the heating mode, the target heat exchanger may be a heat exchanger for heating, the target heat exchanger can heat water, and the temperature of the target heat exchanger is the water temperature. The preset temperature range is a preset desired temperature range. For example, the preset temperature range is a temperature range greater than or equal to T2, and T2 is a set temperature value. The pressure value at the inlet of the compressor is the low pressure value of the refrigerant in the air-conditioning system, and the preset pressure value range is a preset desired pressure value range. For example, the preset pressure value range is a range greater than or equal to P2.

[0081] Step 1057, if the temperature of the target heat exchanger is within the preset temperature range and the pressure value at the inlet of the compressor is within the preset pressure value range, determine that the four-way valve commutation is abnormal.

[0082] Continuing with the example of the above application scenario, if the temperature of the target heat exchanger is greater than or equal to T2 and the pressure value at the compressor inlet is greater than or equal to P2, it indicates that the system heat exchange and refrigerant quantity are normal. At this time, it is determined that the four-way valve is abnormal, and subsequent fault repair operations need to be performed.

[0083] Correspondingly, if the temperature of the target heat exchanger is less than T2, it indicates that the water temperature of the air-conditioning heat pump unit is too low; if the pressure value at the compressor inlet is less than P2, it indicates that the refrigerant quantity of the unit is insufficient. Optionally, if the temperature of the target heat exchanger is not within the preset temperature range, a heat exchange fault prompt message can be output (for example, displaying a prompt that the water temperature of the unit is too low on the display panel). If the pressure value at the compressor inlet is not within the preset pressure range, a prompt message indicating insufficient refrigerant in the unit can be output (for example, displaying insufficient refrigerant on the display panel).

[0084] In this embodiment, when it is determined that the refrigerant pressure difference is less than the preset pressure difference threshold, the heat exchanger and the system low pressure are further judged, so that other reasons for the too low refrigerant pressure difference can be excluded, and thus the abnormality of the four-way valve can be correctly judged.

[0085] In some alternative implementation manners, as Figure 4 shown, after step 105, the method further includes:

[0086] Step 107, if the four-way valve has abnormal commutation, perform the following fault repair operation: control the compressor of the air-conditioning system to keep running, control the four-way valve to be powered off and the first solenoid valve to be closed, after a third preset duration, then control the four-way valve to be powered on and the first solenoid valve to be opened, and after a fourth preset duration, perform the fault repair operation again.

[0087] Among them, the third preset duration and the fourth preset duration can be set according to actual requirements. For example, the third preset duration is 15s and the fourth preset duration is 10s. That is, after the first solenoid valve is closed, after 15s, the first solenoid valve is started, and after another 15s, the fault repair operation is performed again. Repeating this multiple times can impact the four-way valve multiple times, thereby reducing the probability of the four-way valve getting stuck.

[0088] Step 108, if the number of executions of the fault repair operation reaches the first preset number, record the number of abnormal commutations of the four-way valve.

[0089] For example, the first preset number can be 3 times, that is, after repeatedly performing the fault repair operation 3 times, record the current number of abnormal commutations of the four-way valve.

[0090] Step 109, if the number of abnormal commutations of the four-way valve does not reach the second preset number, re-execute the step of controlling the air-conditioning system to enter the preset temperature control mode.

[0091] If the variable n is used to record the number of abnormal reversals of the four-way valve and the second preset number is 2, then initialize n = 0. After executing step 107, the value of n is incremented by 1. If n < 2, start executing from step 101 again.

[0092] Step 110, if the number of abnormal reversals of the four-way valve reaches the second preset number, control the air-conditioning system to shut down.

[0093] That is, if the current n = 2, it is determined that the four-way valve failure cannot be automatically repaired, and at this time the air-conditioning system automatically shuts down. Optionally, the electronic device executing this method can further output a prompt message for prompting the abnormal reversal of the four-way valve, so as to facilitate the handling of the failure.

[0094] In this embodiment, by setting the fault repair operation, when the four-way valve has an abnormal reversal, the fault is automatically repaired, the probability of the four-way valve being stuck is reduced, and the use stability of the four-way valve is improved. At the same time, after multiple fault repair operations are executed, if the fault still cannot be repaired, the system will automatically shut down to avoid further damage to the air-conditioning system.

[0095] In some alternative implementation manners, based on the above Figure 4 shown embodiment, the method further includes:

[0096] If the number of abnormal reversals of the four-way valve reaches the second preset number and the refrigerant pressure difference of the compressor in the air-conditioning system detected most recently is less than the second preset pressure difference threshold, output a prompt message for prompting that the four-way valve has a gas leakage fault.

[0097] Wherein, the second preset pressure difference threshold may be the same as or different from the above first preset pressure difference threshold. For example, the second preset pressure difference threshold is also the above P1. If the current n = 2, it is determined that the four-way valve failure cannot be automatically repaired, and at this time the air-conditioning system automatically shuts down. At the same time, if the most recently judged refrigerant pressure difference ΔP < P1, it means that the four-way valve has a gas leakage fault at the same time.

[0098] Optionally, the electronic device executing this method can further output a prompt message for prompting that the four-way valve has a gas leakage fault, so as to facilitate the handling of the failure.

[0099] In this embodiment, when the four-way valve failure cannot be automatically repaired, the refrigerant pressure difference is further judged. If the refrigerant pressure difference is too low, it is judged that the four-way valve has a gas leakage fault, realizing a more accurate judgment of the specific fault cause of the four-way valve, which helps to more efficiently eliminate the four-way valve fault.

[0100] In some alternative implementation manners, as Figure 5 shown, after step 106, the method further includes:

[0101] Step 111, in response to the air conditioning system exiting the preset temperature control mode, the four-way valve is controlled to be powered off, and the second solenoid valve connected to the four-way valve is controlled to be opened, so that the refrigerant in the air conditioning system flows into the four-way valve through the second solenoid valve.

[0102] Exiting the preset temperature control mode can be manually operated by the user or automatically triggered by the electronic device. As an example, if the preset temperature control mode is the heating mode, then exiting the preset temperature control mode means that the current mode is switched from the heating mode to the cooling mode or other modes; or the air conditioning system is shut down, resulting in exiting the preset temperature control mode.

[0103] One end of the second solenoid valve is connected to the four-way valve, and the other end is connected to the refrigerant pipeline. Usually, in order to increase the impact force of the refrigerant flowing into the four-way valve, the second solenoid valve can be arranged between the four-way valve and the compressor, that is, the second solenoid valve is connected to the compressor through the refrigerant pipeline and the four-way valve, and the high-pressure refrigerant at the exhaust port of the compressor flows into the four-way valve through the second solenoid valve. The second solenoid valve and the above-mentioned first solenoid valve can be connected to the four-way valve through different interfaces, that is, the interface of the first solenoid valve is connected to the internal pipeline of the four-way valve in the power-on state, and the interface of the second solenoid valve is connected to the internal pipeline of the four-way valve in the breakpoint state, so that when the four-way valve is powered off, the refrigerant can flow into the four-way valve and flow out through the internal pipeline of the four-way valve.

[0104] Step 112, after a fifth preset time has passed since the four-way valve was powered off, the compressor of the air-conditioning system is controlled to stop running, and the second solenoid valve is controlled to close.

[0105] The fifth preset time length can be set according to actual needs. For example, the fifth preset time length is 5s.

[0106] This embodiment realizes that when exiting the preset temperature control mode, the four-way valve is first controlled to be powered off, and at the same time, the second solenoid valve is used to provide more refrigerant to the four-way valve, so that when the four-way valve is switched, a greater impact force can be further provided to the four-way valve, thereby improving the success rate of switching. In addition, the four-way valve is closed a period of time earlier than the compressor, thereby ensuring that there is still sufficient pressure difference inside the four-way valve when the four-way valve is switched, which is conducive to the successful execution of the switching operation.

[0107] In some optional implementations, such as Figure 6 As shown, step 103 includes:

[0108] Step 1031, after a sixth preset time period has passed since the preset temperature control mode is entered, the refrigerant pressure difference of the compressor in the air-conditioning system is determined based on the sensing signal.

[0109] The sixth preset time length can be set according to actual needs, for example, the sixth preset time length is 3s. The method for determining the refrigerant pressure difference can refer to the above embodiments, which will not be repeated here.

[0110] Step 1032: Determine whether the refrigerant pressure difference is greater than or equal to the third preset pressure difference threshold.

[0111] The third preset pressure difference threshold may be the same as or different from the above-mentioned first preset pressure difference threshold and second preset pressure difference threshold. For example, the third preset pressure difference threshold is still P1. If the refrigerant pressure difference is greater than or equal to the third preset pressure difference threshold, execute Step 1033; if the refrigerant pressure difference is less than the third preset pressure difference threshold, execute Step 1034.

[0112] Step 1033: Determine that the four-way valve meets the energization condition.

[0113] After determining that the four-way valve meets the energization condition, Step 104 can be continued.

[0114] Step 1034: Determine whether the operating duration of the compressor in the air-conditioning system is greater than or equal to the seventh preset duration since entering the preset temperature control mode.

[0115] Among them, the seventh preset duration can be set according to actual needs. For example, the seventh preset duration is 10s.

[0116] If the operating duration is greater than or equal to the seventh preset duration, execute Step 1033; if the operating duration is less than the seventh preset duration, re-execute the above Step 1032.

[0117] In this embodiment, by detecting the refrigerant pressure difference in real time and the operating duration of the compressor in real time after entering the preset temperature control mode, it can ensure that the energization timing of the four-way valve meets the requirements and improve the stability of the four-way valve commutation.

[0118] In some alternative implementation manners, the method further includes:

[0119] When the air-conditioning system is in a stopped state, in response to the current moment reaching the four-way valve cleaning moment, based on preset cleaning parameters, control the cleaning device in the air-conditioning system to spray cleaning liquid into the four-way valve to clean the inside of the four-way valve.

[0120] Among them, the cleaning device may include components such as a liquid storage tank, a recovery tank, a water pump, a stop valve, etc. The electronic device can control components such as the water pump and the stop valve according to the cleaning parameters, so as to complete the cleaning of the inside of the four-way valve by spraying cleaning liquid.

[0121] The above-mentioned four-way valve cleaning moment may be the moment when the user manually triggers the cleaning operation, or the moment when the electronic device automatically triggers the cleaning operation according to a preset cleaning cycle (such as once a day). The above-mentioned cleaning parameters may include at least one of the following: the total duration of spraying cleaning liquid this time, the spraying frequency, the spraying intensity, etc.

[0122] In this embodiment, by controlling the cleaning device to clean the inside of the four-way valve, the dirt and impurities inside the four-way valve can be effectively removed, the risk of commutation failure of the four-way valve can be reduced, and the reliability and durability of the four-way valve can be improved.

[0123] Combining the above embodiments, Figure 7 The flowchart of another embodiment of the four-way valve commutation control method for an air conditioner provided by this application is shown. Figure 7 The shown scenario is the heating mode. After the air conditioner system is powered on, the heating mode runs and the compressor starts.

[0124] First, after a duration of t1, it is detected whether the high-low pressure difference ΔP of the system is greater than or equal to the preset pressure difference P1. If so, the four-way valve is controlled to be energized and the first solenoid valve is opened. If not, it is detected whether the duration from the start of the compressor to the current moment is greater than or equal to t2. If so, the steps of forcibly energizing the four-way valve and opening the first solenoid valve are executed, otherwise it continues to judge whether the high-low pressure difference is greater than or equal to P1.

[0125] After the four-way valve is energized, after a duration of t3, it is judged again whether ΔP is greater than or equal to P1. If so, after a duration of t4, it is detected whether the evaporation temperature of the system is less than or equal to the preset temperature T0, and whether the difference between the condensation temperature and the evaporation temperature is greater than or equal to T1. If so, the system operates normally in heating mode and the first solenoid valve is closed; if not, the four-way valve repair operation is executed.

[0126] When exiting the heating mode, the four-way valve is de-energized and commutated, and the second solenoid valve is opened. After t5, the compressor is turned off and the second solenoid valve is closed.

[0127] After the four-way valve is energized, after a duration of t3, if it is judged that ΔP is less than P1, it is detected whether the water temperature in the second heat exchanger is greater than or equal to the preset temperature T2. If so, it continues to detect whether the low pressure of the system is greater than the preset pressure P2. If it is greater than P2, the four-way valve repair operation is executed.

[0128] If it is detected that the water temperature in the heat exchanger is less than the preset temperature T2, a prompt message indicating that the water temperature of the unit is too low can be displayed on the display panel; if the low pressure of the system is less than or equal to the preset pressure P2, a prompt message indicating that the refrigerant of the unit is insufficient can be displayed on the display panel.

[0129] The above four-way valve repair operation includes: the compressor keeps running, the four-way valve and the first solenoid valve are closed for 15 s and then energized and started for 10 s, and this action is repeatedly executed 3 times for the four-way valve and the first solenoid valve.

[0130] Then, record the current abnormal number of four-way valve reversals. If the abnormal number is less than 2, re-execute the steps to enter the heating mode. If the abnormal number is equal to 2, determine that the four-way valve reversal fault cannot be repaired, and the system shuts down. At the same time, a prompt message of four-way valve reversal abnormality can be displayed on the display panel. In addition, if the ΔP detected most recently is less than P1, a prompt message of four-way valve gas leakage fault is synchronously output.

[0131] Figure 8 FIG. 4 is a schematic structural diagram of a four-way valve reversal control device for an air conditioner provided by an embodiment of the present application. Specifically, it includes: a first control module 801 for controlling the air conditioner system to enter a preset temperature control mode; an acquisition module 802 for acquiring an induction signal collected by at least one sensor in the air conditioner system; a first determination module 803 for determining whether the four-way valve in the air conditioner system meets the energization condition based on the induction signal; a second control module 804 for controlling the four-way valve to be energized and controlling the first solenoid valve connected to the four-way valve to open if the energization condition is met, so that the refrigerant in the air conditioner system flows into the four-way valve through the first solenoid valve; a second determination module 805 for determining whether the four-way valve reverses normally based on the induction signal; a closing module 806 for closing the first solenoid valve if the four-way valve reverses normally.

[0132] In some alternative implementation manners, the second determination module includes: a first determination unit for determining the refrigerant pressure difference of the compressor in the air conditioner system based on the induction signal after a first preset time period after the four-way valve is energized, where the refrigerant pressure difference is the difference between the pressure value at the exhaust port of the compressor and the pressure value at the intake port; a second determination unit for determining whether the refrigerant pressure difference is greater than or equal to a first preset pressure difference threshold; a third determination unit for determining the temperature difference between the condensation temperature and the evaporation temperature of the air conditioner system based on the induction signal after a second preset time period if the refrigerant pressure difference is greater than or equal to the first preset pressure difference threshold; a fourth determination unit for determining whether the temperature difference is greater than or equal to a preset temperature difference threshold and whether the evaporation temperature of the air conditioner system is less than or equal to a preset temperature; a fifth determination unit for determining that the four-way valve reverses normally if the temperature difference is greater than or equal to the preset temperature difference threshold and the evaporation temperature is less than or equal to the preset temperature.

[0133] In some alternative implementation manners, the second determination module further includes: a sixth determination unit for determining whether the temperature of the target heat exchanger in the air conditioner system is within a preset temperature range and determining whether the pressure value at the intake port of the compressor is within a preset pressure value range based on the induction signal if the refrigerant pressure difference is less than the preset pressure difference threshold; a seventh determination unit for determining that the four-way valve reverses abnormally if the temperature of the target heat exchanger is within the preset temperature range and the pressure value at the intake port of the compressor is within the preset pressure value range.

[0134] In some alternative implementation manners, the device further includes: a repair module, configured to perform the following fault repair operations if the four-way valve has an abnormal commutation: control the compressor of the air-conditioning system to keep running, control the four-way valve to be powered off and the first solenoid valve to be closed, after a third preset duration, then control the four-way valve to be powered on and the first solenoid valve to be opened, and after a fourth preset duration, perform the fault repair operations again; a recording module, configured to record the number of abnormal commutations of the four-way valve if the execution times of the fault repair operations reach a first preset number; an execution module, configured to re-execute the step of controlling the air-conditioning system to enter a preset temperature control mode if the number of abnormal commutations of the four-way valve does not reach a second preset number; a third control module, configured to control the air-conditioning system to shut down if the number of abnormal commutations of the four-way valve reaches the second preset number.

[0135] In some alternative implementation manners, the device further includes: an output module, configured to output a prompt message for indicating that the four-way valve has a gas leakage fault if the number of abnormal commutations of the four-way valve reaches the second preset number and the refrigerant pressure difference of the compressor in the air-conditioning system detected most recently is less than a second preset pressure difference threshold.

[0136] In some alternative implementation manners, the device further includes: a fourth control module, configured to control the four-way valve to be powered off and control the second solenoid valve connected to the four-way valve to be opened in response to the air-conditioning system exiting the preset temperature control mode, so that the refrigerant in the air-conditioning system flows into the four-way valve through the second solenoid valve; a fifth control module, configured to control the compressor of the air-conditioning system to stop running and control the second solenoid valve to be closed after a fifth preset duration after the four-way valve is powered off.

[0137] In some alternative implementation manners, the first determination module includes: an eighth determination unit, configured to determine the refrigerant pressure difference of the compressor in the air-conditioning system based on the induction signal after a sixth preset duration since entering the preset temperature control mode; a ninth determination unit, configured to determine whether the refrigerant pressure difference is greater than or equal to a third preset pressure difference threshold; a tenth determination unit, configured to determine that the four-way valve meets the power-on condition if the refrigerant pressure difference is greater than or equal to the third preset pressure difference threshold; an eleventh determination unit, configured to determine whether the running duration of the compressor in the air-conditioning system since entering the preset temperature control mode is greater than or equal to a seventh preset duration if the refrigerant pressure difference is less than the third preset pressure difference threshold; a twelfth determination unit, configured to determine that the four-way valve meets the power-on condition if it is greater than or equal to the seventh preset duration; an execution unit, configured to re-execute the step of determining whether the refrigerant pressure difference is greater than or equal to the third preset pressure difference threshold if it is less than the seventh preset duration.

[0138] In some alternative implementation manners, the device further includes: a cleaning module, configured to, when the air-conditioning system is in a stopped state, in response to the current time reaching the four-way valve cleaning time, control a cleaning device in the air-conditioning system to spray a cleaning liquid into the four-way valve based on preset cleaning parameters to clean the inside of the four-way valve.

[0139] The reversing control device for the air-conditioning four-way valve provided in this embodiment may be the reversing control device for the air-conditioning four-way valve as shown in Figure 8 , which can execute all steps of the above-mentioned reversing control methods for the air-conditioning four-way valve, and then achieve the technical effects of the above-mentioned reversing control methods for the air-conditioning four-way valve. For specific details, please refer to the above relevant descriptions. For the sake of brevity, it will not be elaborated here.

[0140] Figure 9 FIG. is a schematic structural diagram of an air-conditioning system 900 provided in an embodiment of the present application. Figure 9 The air-conditioning system 900 shown includes: a controller 901, at least one sensor 902, a four-way valve 903, a first solenoid valve 904, a compressor 905, a first heat exchanger 906, and a second heat exchanger 907.

[0141] Among them, at least one sensor 902, a four-way valve 903, and a first solenoid valve 904 are all electrically connected to the controller 901.

[0142] The compressor 905, the four-way valve 903, the first heat exchanger 906, and the second heat exchanger 907 are sequentially connected through refrigerant pipelines, and the second heat exchanger 907 is connected to the four-way valve 903 through a refrigerant pipeline. Generally, the first heat exchanger may include a blower, the first heat exchanger may be arranged outdoors, and the second heat exchanger is arranged indoors.

[0143] The first solenoid valve 904 is connected to the four-way valve 903 and the compressor 905 through a refrigerant pipeline.

[0144] The controller 901 is used to execute the above-mentioned reversing control method for the air-conditioning four-way valve 903. That is, the controller 901 can control the air-conditioning system to enter multiple temperature control modes. When the air-conditioning system enters a preset temperature control mode, a greater reversing thrust is provided for the four-way valve 903 through the first solenoid valve 904 to improve the success rate of reversing.

[0145] The above-mentioned at least one sensor 902 may include various types of sensors, such as a temperature sensor, a pressure sensor, etc. Each sensor can be installed at various places in the air-conditioning system, so that at least one induction signal can be collected. The controller 901 can control the refrigerant flow direction in the four-way valve 903 according to the currently selected temperature control mode. Optionally, as shown in Figure 9 , the system further includes components such as a check valve 908, an oil separator 909, and an expansion valve 910. The check valve 908 is used to make the refrigerant flow in the corresponding direction under different temperature control modes.

[0146] In one example, the preset temperature control mode may be the heating mode. After the air-conditioning system enters the heating mode, the above-mentioned reversing control method for the air-conditioning four-way valve 903 can be executed. Figure 9The dashed arrows indicate the flow direction of the refrigerant in the heating mode, and the solid arrows indicate the flow direction of the refrigerant in the cooling mode. In the heating mode, the refrigerant flows out of the compressor 905, passes through the four-way valve 903, the second heat exchanger 907, the check valve, the first heat exchanger 906, and then through the four-way valve 903 and back to the compressor 905.

[0147] The air-conditioning system provided by the embodiment of the present application realizes that after entering the preset temperature control mode, when it is determined that the energization condition is met according to the collected induction signal, the four-way valve and the first solenoid valve are controlled to be opened simultaneously, so that the refrigerant in the refrigerant pipeline flows into the four-way valve, providing a greater impact force for the four-way valve, assisting the four-way valve to reverse, improving the stability of the four-way valve reversing, and preventing abnormal operation of the air conditioner caused by the four-way valve reversing failure.

[0148] In some optional implementation manners, as Figure 9 shown, at least one sensor 902 includes a first pressure sensor (PS1), a second pressure sensor (PS2), a first temperature sensor (TS1), and a second temperature sensor (TS2). The first pressure sensor is arranged at the exhaust port of the compressor 905, and the second pressure sensor is arranged at the intake port of the compressor 905. The first temperature sensor is arranged in the condenser (for example, in the heating mode, the first heat exchanger 906 realizes the function of the condenser), and the second temperature sensor is arranged in the evaporator (for example, in the heating mode, the second heat exchanger 907 realizes the function of the evaporator).

[0149] The first pressure sensor is used to detect the pressure value at the exhaust port of the compressor 905, and the second pressure sensor is used to detect the pressure value at the intake port of the compressor 905. The first temperature sensor is used to detect the condensation temperature of the refrigerant in the system, and the second temperature sensor is used to detect the evaporation temperature of the refrigerant in the system.

[0150] Based on the above two pressure values and two temperature values, the controller 901 can perform the following steps:

[0151] After the four-way valve 903 is energized for the first preset duration, based on the induction signal, determine the refrigerant pressure difference of the compressor 905 in the air-conditioning system; determine whether the refrigerant pressure difference is greater than or equal to the first preset pressure difference threshold; if the refrigerant pressure difference is greater than or equal to the first preset pressure difference threshold, after the second preset duration, based on the induction signal, determine the temperature difference between the condensation temperature and the evaporation temperature of the air-conditioning system; determine whether the temperature difference is greater than or equal to the preset temperature difference threshold, and whether the evaporation temperature of the air-conditioning system is less than or equal to the preset temperature; if the temperature difference is greater than or equal to the preset temperature difference threshold and the evaporation temperature is less than or equal to the preset temperature, determine that the four-way valve 903 reverses normally.

[0152] For a detailed description of the steps executed by the controller 901, reference can be made to the aboveFigure 2 For corresponding embodiments, they will not be elaborated here.

[0153] In this embodiment, by setting a pressure sensor and a temperature sensor to judge the high and low pressure difference of the refrigerant in the air-conditioning system and the evaporation and condensation temperatures, it is possible to more accurately judge whether the air-conditioning system is operating normally under the preset temperature control mode, and thus more accurately judge whether the four-way valve 903 is commutated normally.

[0154] In some alternative implementation manners, as Figure 10 shown, the system further includes a second solenoid valve 911. The second solenoid valve is electrically connected to the controller 901 and is connected to the four-way valve 903 and the compressor 905 through a refrigerant pipeline.

[0155] The second solenoid valve and the above-mentioned first solenoid valve 904 can be connected to the four-way valve 903 through different interfaces, that is, the interface of the first solenoid valve 904 is connected to the internal pipeline of the four-way valve 903 in the energized state, and the interface of the second solenoid valve is connected to the internal pipeline of the four-way valve 903 in the break state. Thus, when the four-way valve 903 is de-energized, the refrigerant can flow into the four-way valve 903 and flow out through the internal pipeline of the four-way valve 903.

[0156] Based on this second solenoid valve, the controller 901 can perform the following steps:

[0157] In response to the air-conditioning system exiting the preset temperature control mode, control the four-way valve 903 to be de-energized, and control the second solenoid valve connected to the four-way valve 903 to open, so that the refrigerant in the air-conditioning system flows into the four-way valve 903 through the second solenoid valve; after a fifth preset time period after the four-way valve 903 is de-energized, control the compressor 905 of the air-conditioning system to stop running, and control the second solenoid valve to close.

[0158] For a detailed description of the steps executed by the controller 901, reference can be made to the above Figure 5 corresponding embodiments, which will not be elaborated here.

[0159] As Figure 11A and Figure 11B shown, it shows a connection schematic diagram of the four-way valve 903, the first solenoid valve 904, and the second solenoid valve. Among them, as Figure 11A is the front view, Figure 11B is the side view. Ports D, E, S, and C are the four pipeline interfaces of the four-way valve 903, and H is the pipeline interface between the first solenoid valve 904 and the four-way valve 903.

[0160] In this embodiment, when exiting the preset temperature control mode, the four-way valve 903 is first controlled to be powered off, and at the same time, the second solenoid valve is used to supply more refrigerant to the four-way valve 903, so that when the four-way valve 903 changes its direction, a greater impact force can be further provided to the four-way valve 903, improving the success rate of the direction change. Moreover, the four-way valve 903 is closed earlier than the compressor 905 by a certain period of time, so as to ensure that there is still sufficient pressure difference inside when the four-way valve 903 changes its direction, which helps the successful execution of the direction change operation.

[0161] In some alternative implementation manners, as Figure 12 shown, the system further includes a cleaning device 912, as Figure 13 shown, the cleaning device includes a liquid storage tank 9121, a recovery tank 9122, a water pump 9123, and a stop valve 9124.

[0162] Both the water pump and the stop valve are electrically connected to the controller 901. That is, the controller 901 can control the opening and closing of the water pump and the stop valve.

[0163] The liquid storage tank, the water pump, the stop valve, the four-way valve 903, and the recovery tank are sequentially connected through a cleaning liquid pipeline. The number of stop valves can be at least one, as Figure 13 shown, the number of stop valves is four.

[0164] Based on Figure 13 the cleaning device shown, the controller 901 can perform the following steps:

[0165] When the air-conditioning system is in a stopped state, in response to the current time reaching the cleaning time of the four-way valve 903, based on the preset cleaning parameters, the controller 901 controls the cleaning device in the air-conditioning system to spray cleaning liquid into the four-way valve 903 to clean the inside of the four-way valve 903.

[0166] Specifically, when reaching the cleaning time, the controller 901 can control the stop valve to open and control the water pump to operate according to the cleaning parameters to spray cleaning liquid into the four-way valve 903. Optionally, as Figure 13 shown, the cleaning device may further include a filter, and the filter is arranged on the pipeline between the four-way valve 903 and the recovery tank to filter the cleaning liquid after cleaning so that the recovered cleaning liquid can be reused.

[0167] In this embodiment, by setting a cleaning device to clean the inside of the four-way valve 903, the dirt and impurities inside the four-way valve 903 can be effectively removed, the risk of the four-way valve 903 having a direction change failure can be reduced, and the reliability and durability of the four-way valve 903 can be improved.

[0168] Figure 14 It is a schematic structural diagram of an electronic device provided by an embodiment of the present application. Figure 14The electronic device 1400 shown includes: at least one processor 1401, a memory 1402, at least one network interface 1404, and other user interfaces 1403. Each component in the electronic device 1400 is coupled together through a bus system 1405. It can be understood that the bus system 1405 is used to implement connection communication between these components. In addition to a data bus, the bus system 1405 also includes a power bus, a control bus, and a status signal bus. However, for the sake of clear illustration, in Figure 14 all kinds of buses are labeled as the bus system 1405.

[0169] Among them, the user interface 1403 may include a display, a keyboard, or a pointing device (for example, a mouse, a trackball, a touchpad, or a touch screen, etc.).

[0170] It can be understood that the memory 1402 in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example but not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synch link dynamic random access memory (SLDRAM), and direct rambus random access memory (DRRAM). The memory 1402 described herein is intended to include but not be limited to these and any other suitable types of memory.

[0171] In some embodiments, the memory 1402 stores the following elements, executable units, or data structures, or subsets thereof, or extended sets thereof: an operating system 14021 and application programs 14022.

[0172] Among them, the operating system 14021 includes various system programs, such as the framework layer, the core library layer, the driver layer, etc., which are used to implement various basic services and process hardware-based tasks. The application program 14022 includes various application programs, such as a Media Player, a Browser, etc., which are used to implement various application services. The program for implementing the method of the embodiment of the present application may be included in the application program 14022.

[0173] In this embodiment, by calling the program or instruction stored in the memory 1402, specifically, it may be the program or instruction stored in the application program 14022, the processor 1401 is used to execute the method steps provided by each method embodiment, for example, including:

[0174] Controlling the air-conditioning system to enter a preset temperature control mode; obtaining an induction signal collected by at least one sensor in the air-conditioning system; based on the induction signal, determining whether the four-way valve in the air-conditioning system meets the energization condition; if it meets the energization condition, controlling the four-way valve to be energized and controlling the first solenoid valve connected to the four-way valve to open, so that the refrigerant in the air-conditioning system flows into the four-way valve through the first solenoid valve; based on the induction signal, determining whether the four-way valve commutates normally; if the four-way valve commutates normally, closing the first solenoid valve.

[0175] The method disclosed in the embodiments of the present application above can be applied to the processor 1401 or implemented by the processor 1401. The processor 1401 may be an integrated circuit chip with signal processing capabilities. During implementation, the steps of the above method can be completed by the integrated logic circuit in the hardware of the processor 1401 or instructions in the form of software. The above-mentioned processor 1401 may be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. It can implement or execute the various methods, steps, and logic block diagrams disclosed in the embodiments of the present application. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc. The steps of the method disclosed in combination with the embodiments of the present application can be directly implemented by the execution of the hardware decoding processor or completed by the combination of the hardware and software units in the decoding processor. The software unit may be located in a mature storage medium in the art such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, register, etc. This storage medium is located in the memory 1402, and the processor 1401 reads the information in the memory 1402 and combines its hardware to complete the steps of the above method.

[0176] It can be understood that these embodiments described herein can be implemented using hardware, software, firmware, middleware, microcode, or a combination thereof. For hardware implementation, the processing unit can be implemented in one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), general-purpose processors, controllers, microcontrollers, microprocessors, other electronic units for performing the above functions of the present application, or a combination thereof.

[0177] For software implementation, the above technologies herein can be implemented by units that execute the functions described above. The software code can be stored in a memory and executed by a processor. The memory can be implemented inside or outside the processor.

[0178] The electronic device provided in this embodiment may be the electronic device shown in Figure 14 and can execute all steps of the above-described air-conditioning four-way valve commutation control methods, thereby achieving the technical effects of the above-described air-conditioning four-way valve commutation control methods. For specific reference, please refer to the above-related descriptions. For the sake of brevity, it will not be elaborated here.

[0179] This application embodiment also provides a storage medium (computer-readable storage medium). One or more programs are stored in this storage medium. Among them, the storage medium may include volatile memory, such as random access memory; the memory may also include non-volatile memory, such as read-only memory, flash memory, hard disk or solid-state drive; the memory may also include a combination of the above types of memory.

[0180] When one or more programs in the storage medium can be executed by one or more processors to implement the above-described air-conditioning four-way valve commutation control method executed on the electronic device side.

[0181] The above-mentioned processor is used to execute the program stored in the memory to implement the following steps of the air-conditioning four-way valve commutation control method executed on the electronic device side:

[0182] Control the air-conditioning system to enter a preset temperature control mode; obtain the sensed signals collected by at least one sensor in the air-conditioning system; based on the sensed signals, determine whether the four-way valve in the air-conditioning system meets the energization condition; if it meets the energization condition, control the four-way valve to be energized, and control the first solenoid valve connected to the four-way valve to open, so that the refrigerant in the air-conditioning system flows into the four-way valve through the first solenoid valve; based on the sensed signals, determine whether the four-way valve commutes normally; if the four-way valve commutes normally, close the first solenoid valve.

[0183] Professional personnel should also be able to further realize that the units and algorithm steps of each example described in combination with the embodiments disclosed in this article can be implemented by electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described according to functions in the above description. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Professional technicians can use different circuits to implement the described functions for each specific application, but this implementation should not be considered to exceed the scope of this application.

[0184] The steps of the circuits or algorithms described in connection with the embodiments disclosed herein may be implemented in hardware, software modules executed by a processor, or a combination of both. The software modules may be placed in a random access memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium well known in the art.

[0185] It should be understood that the terms used herein are for the purpose of describing particular example embodiments only and are not intended to be limiting. Unless the context clearly dictates otherwise, the singular forms "a", "an", and "the" as used herein may also include the plural forms. The terms "comprising", "including", "containing", and "having" are inclusive and thus specify the presence of the stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless the order of performance is explicitly stated. It should also be understood that additional or alternative steps may be used.

[0186] The above are only specific embodiments of the present application, enabling those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but rather is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A method for controlling the commutation of an air conditioner four-way valve, characterized in that, The method includes: Controlling the air conditioning system to enter a preset temperature control mode; Obtaining induction signals collected by at least one sensor in the air conditioning system; Based on the induction signals, determining whether a four-way valve in the air conditioning system meets the energization condition; If meeting the energization condition, controlling the four-way valve to be energized and controlling a first electromagnetic valve connected to the four-way valve to open, so that the refrigerant in the air conditioning system flows into the four-way valve through the first electromagnetic valve; Based on the induction signals, determining whether the four-way valve commutates normally; If the four-way valve commutates normally, closing the first electromagnetic valve.

2. The method according to claim 1, characterized in that, The determining whether the four-way valve commutates normally based on the induction signals includes: After a first preset time period after the four-way valve is energized, based on the induction signals, determining the refrigerant pressure difference of a compressor in the air conditioning system, where the refrigerant pressure difference is the difference between the pressure value at the exhaust port of the compressor and the pressure value at the intake port; Determining whether the refrigerant pressure difference is greater than or equal to a first preset pressure difference threshold; If the refrigerant pressure difference is greater than or equal to the first preset pressure difference threshold, after a second preset time period, based on the induction signals, determining the temperature difference between the condensation temperature and the evaporation temperature of the air conditioning system; Determining whether the temperature difference is greater than or equal to a preset temperature difference threshold and whether the evaporation temperature of the air conditioning system is less than or equal to a preset temperature; If the temperature difference is greater than or equal to the preset temperature difference threshold and the evaporation temperature is less than or equal to the preset temperature, determining that the four-way valve commutates normally.

3. The method according to claim 2, wherein After the determining whether the refrigerant pressure difference is greater than or equal to the first preset pressure difference threshold, the method further includes: If the refrigerant pressure difference is less than the preset pressure difference threshold, based on the induction signals, determining whether the temperature of a target heat exchanger in the air conditioning system is within a preset temperature range and determining whether the pressure value at the intake port of the compressor is within a preset pressure value range; If the temperature of the target heat exchanger is within the preset temperature range and the pressure value at the intake port of the compressor is within the preset pressure value range, determining that the four-way valve commutates abnormally.

4. The method according to claim 1, characterized in that, After the determining whether the four-way valve commutates normally based on the induction signals, the method further includes: If the four-way valve commutates abnormally, performing the following fault repair operation: controlling the compressor of the air conditioning system to keep running, controlling the four-way valve to be de-energized and the first electromagnetic valve to be closed, after a third preset time period, then controlling the four-way valve to be energized and the first electromagnetic valve to be opened, after a fourth preset time period, performing the fault repair operation again; If the execution times of the fault repair operation reach a first preset number of times, recording the number of abnormal commutating times of the four-way valve; If the number of abnormal commutating times of the four-way valve does not reach a second preset number of times, re-performing the step of controlling the air conditioning system to enter the preset temperature control mode; If the number of abnormal commutating times of the four-way valve reaches the second preset number of times, controlling the air conditioning system to stop.

5. The method according to claim 4, characterized in that, The method further includes: If the abnormal commutation times of the four-way valve reach the second preset times, and the refrigerant pressure difference of the compressor in the air-conditioning system detected most recently is less than the second preset pressure difference threshold, an alarm message for indicating that the four-way valve has a gas leakage fault is output.

6. The method according to claim 1, characterized in that After the first electromagnetic valve is closed when the four-way valve commutates normally, the method further includes: In response to the air-conditioning system exiting the preset temperature control mode, the power supply of the four-way valve is controlled to be cut off, and the second electromagnetic valve connected to the four-way valve is controlled to be opened, so that the refrigerant in the air-conditioning system flows into the four-way valve through the second electromagnetic valve. After a fifth preset time period elapses after the power supply of the four-way valve is cut off, the compressor of the air-conditioning system is controlled to stop operating, and the second electromagnetic valve is controlled to be closed.

7. The method according to claim 1, characterized in that Determining whether the four-way valve in the air-conditioning system meets the power-on condition based on the induction signal includes: After a sixth preset time period elapses after entering the preset temperature control mode, based on the induction signal, determining the refrigerant pressure difference of the compressor in the air-conditioning system; Determining whether the refrigerant pressure difference is greater than or equal to a third preset pressure difference threshold; If the refrigerant pressure difference is greater than or equal to the third preset pressure difference threshold, determining that the four-way valve meets the power-on condition; If the refrigerant pressure difference is less than the third preset pressure difference threshold, determining whether the operation duration of the compressor in the air-conditioning system is greater than or equal to a seventh preset time period since entering the preset temperature control mode; If it is greater than or equal to the seventh preset time period, determining that the four-way valve meets the power-on condition; If it is less than the seventh preset time period, re-executing the step of determining whether the refrigerant pressure difference is greater than or equal to the third preset pressure difference threshold.

8. The method according to any one of claims 1 to 7, characterized in that The method further includes: When the air-conditioning system is in a stopped operation state, in response to the current time reaching the four-way valve cleaning time, based on preset cleaning parameters, controlling a cleaning device in the air-conditioning system to spray a cleaning liquid into the four-way valve to clean the inside of the four-way valve.

9. An air conditioning system, characterized in that, The air-conditioning system includes: a controller, at least one sensor, a four-way valve, a first electromagnetic valve, a compressor, a first heat exchanger, and a second heat exchanger, wherein the at least one sensor, the four-way valve, and the first electromagnetic valve are all electrically connected to the controller; The compressor, the four-way valve, the first heat exchanger, and the second heat exchanger are sequentially connected through refrigerant pipelines, and the second heat exchanger is connected to the four-way valve through a refrigerant pipeline; The first electromagnetic valve is connected to the four-way valve and the compressor through a refrigerant pipeline; The controller is configured to execute the air-conditioning four-way valve commutation control method according to any one of claims 1-8.

10. The system according to claim 9, wherein The at least one sensor includes a first pressure sensor, a second pressure sensor, a first temperature sensor, and a second temperature sensor; The first pressure sensor is configured to detect the pressure value at the exhaust port of the compressor, and the second pressure sensor is configured to detect the pressure value at the intake port of the compressor; The first temperature sensor is configured to detect the condensation temperature of the refrigerant in the system, and the second temperature sensor is configured to detect the evaporation temperature of the refrigerant in the system.

11. The system according to claim 9, wherein The system further includes a second electromagnetic valve; The second solenoid valve is electrically connected to the controller and is connected to the four-way valve and the compressor through a refrigerant pipeline.

12. The system according to claim 9, wherein The system further includes a cleaning device, and the cleaning device includes a liquid storage tank, a recovery tank, a water pump, and a stop valve; Both the water pump and the stop valve are electrically connected to the controller; The liquid storage tank, the water pump, the stop valve, the four-way valve, and the recovery tank are sequentially connected through a cleaning liquid pipeline.

13. An electronic device, characterized in that, Comprising: A memory for storing a computer program; A processor for executing the computer program stored in the memory, and when the computer program is executed, implementing the air-conditioning four-way valve commutation control method according to any one of claims 1-8 above.

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