Compressor control method and device in defrosting process, air conditioning system and electronic equipment

Abstract

The embodiment of the invention relates to a compressor control method and device in the defrosting process, an air conditioner system and electronic equipment, and the method comprises the steps that a compressor of an air conditioner is started in response to a defrosting operation instruction for triggering an outdoor unit of the air conditioner; controlling a four-way valve included in the air conditioner to be switched to a defrosting state and controlling the air conditioner to start defrosting operation at the moment after the first waiting duration after the compressor is started; in response to the end of the defrosting operation, the compressor is controlled to stop, and the current outdoor environment temperature is determined; based on the corresponding relation between the preset temperature and the pressure balance duration, the pressure balance duration corresponding to the outdoor environment temperature is determined to serve as the shutdown duration of the compressor; and after the compressor stops, the air conditioner is controlled to start indoor heating operation at the moment of the stop duration. According to the embodiment of the invention, the impact of refrigerant fluid on the compressor in the reversing process of the four-way valve is effectively reduced, the hydraulic compression problem of the compressor is effectively solved, and the cost for solving the hydraulic compression problem is reduced.

Description

Technical Field

[0001] The present application relates to the field of air conditioning technology, and in particular to a compressor control method, device, air conditioning system and electronic equipment during a defrosting process. Background Art

[0002] During the operation of the air-conditioning unit, when the refrigerant liquid refluxes in the unit, the compressor is prone to liquid hammer. When the compressor has liquid hammer, it is easy to have compressor overcurrent problems, which will cause the reliability of the unit to decrease. This situation is more common under low temperature conditions. In actual operation scenarios, during the defrosting process under low temperature conditions, the compressor liquid will be compressed due to the compressor liquid hammer caused by the reversing of the four-way valve, resulting in unstable control of the compressor and affecting the long-term reliability of the unit. Therefore, how to reduce the risk of compressor liquid compression during the defrosting process is a problem that needs to be solved at present. Summary of the invention

[0003] In view of this, in order to solve some or all of the above-mentioned technical problems, the embodiments of the present application provide a compressor control method, device, air conditioning system and electronic equipment during the defrosting process.

[0004] In a first aspect, an embodiment of the present application provides a method for controlling a compressor during a defrost process, the method comprising: in response to triggering a defrost operation instruction to an air-conditioning outdoor unit, starting the compressor of the air-conditioning; at a moment after a first waiting time has passed after the compressor is started, controlling the four-way valve included in the air-conditioning to switch to a defrost state, and controlling the air-conditioning to start a defrost operation; in response to the end of the defrost operation, controlling the compressor to stop, and determining the current outdoor ambient temperature; based on a correspondence between a preset temperature and a pressure balance time, determining the pressure balance time corresponding to the outdoor ambient temperature as the shutdown time of the compressor; at a moment after the shutdown time has passed after the compressor is stopped, controlling the air-conditioning to start an indoor heating operation.

[0005] In one possible embodiment, based on the correspondence between the preset temperature and the pressure balance time, the pressure balance time corresponding to the outdoor ambient temperature is determined as the shutdown time of the compressor, including: determining the target temperature range to which the outdoor ambient temperature belongs from at least two preset temperature ranges; based on the correspondence between the preset temperature range and the pressure balance time, determining the pressure balance time corresponding to the target temperature range as the shutdown time of the compressor.

[0006] In one possible embodiment, controlling the air conditioner to start the indoor heating operation includes: based on the corresponding relationship between the preset temperature and pressure difference establishment time, determining the pressure difference establishment time corresponding to the outdoor ambient temperature as the second waiting time of the four-way valve, and controlling the compressor to start; after the second waiting time has passed after the compressor is started, controlling the four-way valve to switch to the heating state, so that the air conditioner performs the heating operation.

[0007] In one possible embodiment, based on the correspondence between the preset temperature and pressure difference establishment time, the pressure difference establishment time corresponding to the outdoor ambient temperature is determined as the second waiting time of the four-way valve, including: determining the target temperature interval to which the outdoor ambient temperature belongs from at least two preset temperature intervals; based on the correspondence between the preset temperature interval and the pressure difference establishment time, determining the pressure difference establishment time corresponding to the outdoor ambient temperature as the second waiting time of the four-way valve.

[0008] In one possible embodiment, based on the correspondence between the preset temperature and the pressure difference establishment time, the pressure difference establishment time corresponding to the outdoor ambient temperature is determined as the second waiting time of the four-way valve, including: based on the pressure difference establishment time calculation formula obtained in advance through data fitting, the outdoor ambient temperature is calculated, and the pressure difference establishment time corresponding to the outdoor ambient temperature is obtained as the second waiting time of the four-way valve.

[0009] In a possible implementation, the method further includes: in response to detecting that the pressure at the exhaust port of the compressor is greater than or equal to a preset pressure threshold, starting a fan of the air conditioner outdoor unit to reduce the pressure at the exhaust port.

[0010] In a second aspect, an embodiment of the present application provides a compressor control device during a defrost process, the device comprising: a starting module, for starting the compressor of the air conditioner in response to triggering a defrost operation instruction to an outdoor unit of the air conditioner; a first control module, for controlling the four-way valve included in the air conditioner to switch to a defrost state at a moment when a first waiting time has passed after the compressor is started, and controlling the air conditioner to start the defrost operation; a first determination module, for controlling the compressor to stop in response to the end of the defrost operation, and determining the current outdoor ambient temperature; a second determination module, for determining the pressure balance time corresponding to the outdoor ambient temperature as the shutdown time of the compressor based on the corresponding relationship between a preset temperature and a pressure balance time; and a second control module, for controlling the air conditioner to start the indoor heating operation at a moment when the shutdown time has passed after the compressor is stopped.

[0011] In a third aspect, an embodiment of the present application provides an air-conditioning system, which includes: an indoor unit, an outdoor unit and a controller, the outdoor unit includes a four-way valve, a compressor, and a temperature sensor, the four-way valve, the compressor and the temperature sensor are all electrically connected to the controller, and the four-way valve is connected to the indoor unit through a pipeline; the controller is used to execute the compressor control method in the defrost process described in the first aspect above.

[0012] In a fourth aspect, an embodiment of the present application provides an electronic device, 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, the method of any embodiment of the compressor control method during the defrosting process of the above-mentioned first aspect of the present application is implemented.

[0013] In a fifth aspect, an embodiment of the present application provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the method of any embodiment of the compressor control method during the defrosting process of the first aspect described above is implemented.

[0014] In a sixth aspect, an embodiment of the present application provides a computer program, which includes a computer readable code. When the computer readable code runs on a device, the processor in the device implements a method as in any embodiment of the compressor control method during the defrosting process of the first aspect mentioned above.

[0015] The compressor control method, device, air conditioning system and electronic device in the defrosting process provided by the embodiment of the present application, when performing the defrosting operation on the air conditioner outdoor unit, the compressor is first started, and after the first waiting time has passed after the start, the four-way valve is controlled to switch to the defrosting state, and the air conditioner is controlled to start the defrosting operation. At the end of the defrosting operation, the compressor is controlled to stop, and the current outdoor ambient temperature is determined. Based on the corresponding relationship between the temperature and the pressure balance time, the pressure balance time corresponding to the outdoor ambient temperature is determined as the compressor stop time, and after the compressor stops and the stop time has passed, the air conditioner is controlled to start the indoor heating operation. The embodiment of the present application realizes the control of the start and stop timing of the compressor during the defrosting operation, especially after the defrosting is completed, according to the current outdoor ambient temperature, the corresponding shutdown time of the compressor is accurately controlled, so that the pressure difference between the refrigerant inlet and outlet of the compressor reaches a balance before starting the heating operation, thereby effectively reducing the impact of the refrigerant fluid on the compressor during the four-way valve reversing process, effectively solving the liquid compression problem of the compressor, and improving the reliability of the compressor during operation. In addition, the embodiment of the present application does not require any additional hardware devices, and only needs to control the downtime of the compressor, thereby reducing the cost of solving the liquid compression problem. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0018] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0019] Figure 1 A schematic flow chart of a compressor control method in a defrosting process provided by an embodiment of the present application;

[0020] Figure 2 A schematic flow chart of another compressor control method in a defrosting process provided by an embodiment of the present application;

[0021] Figure 3 A schematic flow chart of another compressor control method in a defrosting process provided by an embodiment of the present application;

[0022] Figure 4 A schematic flow chart of another compressor control method in a defrosting process provided by an embodiment of the present application;

[0023] Figure 5 A schematic diagram of the corresponding relationship between the outdoor ambient temperature and the pressure difference establishment time provided in an embodiment of the present application;

[0024] Figure 6 A schematic diagram of the structure of a compressor control device in a defrosting process provided by an embodiment of the present application;

[0025] Figure 7 A schematic diagram of the structure of an air conditioning system provided in an embodiment of the present application;

[0026] Figure 8 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0027] Various exemplary embodiments of the present application will now 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 arrangement of the components and steps, the numerical expressions and the numerical values ​​described in these embodiments do not limit the scope of the present application.

[0028] Those skilled in the art will understand that the terms "first" and "second" in the embodiments of the present application are only used to distinguish between different steps, devices, modules and other objects, and do not represent any specific technical meanings, nor do they indicate the logical order between them.

[0029] It should also be understood that in this embodiment, “plurality” may refer to two or more than two, and “at least one” may refer to one, two or more than two.

[0030] It should also be understood that any component, data or structure mentioned in the embodiments of the present application can generally be understood as one or more, unless explicitly limited or otherwise indicated in the context.

[0031] In addition, the term "and / or" in this application is only 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 at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0032] It should also be understood that the description of the various embodiments in this application focuses on the differences between the various embodiments, and the same or similar aspects thereof can be referenced to each other, and for the sake of brevity, they will not be described one by one.

[0033] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present application, its application, or uses.

[0034] Technologies, circuits, and devices known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the above-mentioned technologies, circuits, and devices should be considered as part of the specification.

[0035] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0036] It should be noted that, in the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. To facilitate the understanding of 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. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0037] In order to solve the technical problem of compressor liquid compression occurring during the defrost operation in the prior art, the present application provides a compressor control method during the defrost process, which reduces the impact of refrigerant liquid on the compressor when the compressor is started by accurately controlling the compressor shutdown time after the defrost is completed.

[0038] Figure 1A flow chart of a compressor control method in a defrosting process provided by an embodiment of the present application. The method can be applied to an air-conditioning system and can be executed by a controller included in the air-conditioning system. Optionally, the method can also be executed by other electronic devices connected to the air-conditioning system, such as a central control device, a smart phone, a personal computer, etc., which can obtain status data such as temperature from the air-conditioning system and send various control instructions to the air-conditioning system. In addition, the execution subject of the method can be hardware or software. When the above-mentioned execution subject is hardware, the execution subject can be one or more of the above-mentioned electronic devices. For example, a single electronic device can execute the method, or a plurality of electronic devices can cooperate with each other to execute the method. When the above-mentioned execution subject is software, the method can be implemented as multiple software or software modules, or as a single software or software module. No specific limitation is made here.

[0039] like Figure 1 As shown, the method specifically includes:

[0040] Step 101, in response to triggering a defrost operation instruction for an air-conditioning outdoor unit, starting a compressor of the air-conditioning.

[0041] In some embodiments, when the outdoor temperature is too low, frost may occur outdoors. At this time, the air conditioner performs a defrost operation. The defrost operation instruction may be triggered automatically or manually by the user. After the electronic device executing the method detects the defrost operation instruction, the compressor may be started immediately.

[0042] Step 102, after the compressor is started and a first waiting time has passed, the four-way valve included in the air conditioner is controlled to switch to a defrost state, and the air conditioner is controlled to start a defrost operation.

[0043] In some embodiments, the four-way valve is used to switch the flow direction of the refrigerant in the air-conditioning system to adapt to different working modes of the air-conditioning system. Usually, in the defrost mode, the four-way valve can lose power, and the refrigerant flows through the four-way valve in the corresponding flow direction. In order to reduce the success rate of the action execution of the switching components in the four-way valve when the four-way valve is switched, the four-way valve can be controlled to switch the state after the compressor is started and after a first waiting time, so that a sufficient refrigerant pressure difference is established at both ends of the four-way valve, thereby improving the switching success rate. After the four-way valve is switched to the defrost state, the various components included in the air conditioner can be controlled to start the defrost operation.

[0044] The first waiting time can be preset, for example, 20 seconds.

[0045] Step 103, in response to the end of the defrosting operation, the compressor is controlled to stop, and the current outdoor ambient temperature is determined.

[0046] In some embodiments, after the defrosting operation is completed, the compressor can be controlled to stop and wait for the indoor heating operation to start. At this time, the current outdoor ambient temperature can be first collected through the temperature sensor on the outdoor unit.

[0047] Step 104: Based on the corresponding relationship between the preset temperature and the pressure balance time, determine the pressure balance time corresponding to the outdoor ambient temperature as the shutdown time of the compressor.

[0048] In some embodiments, the corresponding relationship between the temperature and the pressure balance time can be obtained in advance through calibration. The corresponding relationship can be expressed in the form of a table, a calculation formula, etc. As an example, the corresponding relationship between the temperature and the pressure balance time is shown in Table 1 below:

[0049] Table 1

[0050]

[0051] The pressure balance time refers to the time required for the refrigerant inlet and outlet pressure difference of the compressor to reach equilibrium after the compressor is shut down.

[0052] Step 105, when the compressor stops for a certain period of time, the air conditioner is controlled to start indoor heating operation.

[0053] In some embodiments, after the compressor is shut down for the above-mentioned shutdown time, the refrigerant inlet and outlet pressure difference of the compressor reaches equilibrium, and then the heating mode can be entered to operate the compressor and heat the room.

[0054] The compressor control method in the defrosting process provided by the embodiment of the present application is to start the compressor first when performing the defrosting operation on the air conditioner outdoor unit, and control the four-way valve to switch to the defrosting state after the first waiting time after starting, and control the air conditioner to start the defrosting operation. At the end of the defrosting operation, the compressor is controlled to stop, and the current outdoor ambient temperature is determined. Based on the corresponding relationship between the temperature and the pressure balance time, the pressure balance time corresponding to the outdoor ambient temperature is determined as the compressor stop time, and the air conditioner is controlled to start the indoor heating operation after the compressor stops for the stop time. The embodiment of the present application realizes the control of the start and stop timing of the compressor during the defrosting operation, especially after the defrosting is completed, according to the current outdoor ambient temperature, the corresponding shutdown time of the compressor is accurately controlled, so that the pressure difference between the refrigerant inlet and outlet of the compressor reaches a balance before starting the heating operation, thereby effectively reducing the impact of the refrigerant fluid on the compressor during the four-way valve reversing process, effectively solving the liquid compression problem of the compressor, and improving the reliability of the compressor during operation. In addition, the embodiment of the present application does not require any additional hardware devices, and only needs to control the downtime of the compressor, thereby reducing the cost of solving the liquid compression problem.

[0055] In some optional implementations, such as Figure 2 As shown, step 104 includes:

[0056] Step 1041, determining a target temperature interval to which the outdoor ambient temperature belongs from at least two preset temperature intervals.

[0057] The number of temperature intervals and the range of each temperature interval can be set according to actual needs. As an example, at least two temperature intervals may include: greater than or equal to -30°C and less than 0°C, greater than or equal to 0°C and less than 5°C, and greater than or equal to 5°C.

[0058] Step 1042: Based on the correspondence between the preset temperature range and the pressure balance time, determine the pressure balance time corresponding to the target temperature range as the shutdown time of the compressor.

[0059] The corresponding relationship between the temperature range and the pressure balance time can be obtained in advance through calibration. As an example, let T be the current outdoor ambient temperature. If -30℃≤T<0℃, the corresponding shutdown time is 40s; if 0℃≤T<5℃, the corresponding shutdown time is 29s; if 5℃≤T, the corresponding shutdown time is 24s.

[0060] This embodiment can reduce the amount of data for calibrating the correspondence between outdoor ambient temperature and pressure balance time by setting pressure balance time corresponding to at least two temperature intervals, thereby helping to reduce the complexity of air-conditioning system control and improve control efficiency.

[0061] In some optional implementations, such as Figure 3 As shown, step 105 includes:

[0062] Step 1051, based on the corresponding relationship between the preset temperature and the pressure difference establishment time, determine the pressure difference establishment time corresponding to the outdoor ambient temperature as the second waiting time of the four-way valve, and control the compressor to start.

[0063] Among them, the corresponding relationship between temperature and pressure difference establishment time can be obtained in advance through calibration. The corresponding relationship can be expressed in the form of a table, calculation formula, etc. Usually, the refrigerant in the four-way valve flows to the switching device. In the absence of a pressure difference generated by the refrigerant, the switching success rate will be reduced. In order to improve the success rate, you can wait for a period of time after the compressor is started so that the inlet and outlet pressure difference of the four-way valve reaches a certain level. The length of this period of time is the pressure difference establishment time.

[0064] Step 1052: After the compressor is started and the second waiting time has passed, the four-way valve is controlled to switch to the heating state so that the air conditioner performs a heating operation.

[0065] After the compressor is started, the four-way valve is controlled to perform the state switching operation after the second waiting period, so that the refrigerant flow switching device in the four-way valve can successfully perform the switching action under the drive of the refrigerant pressure difference.

[0066] This embodiment pre-establishes the corresponding relationship between temperature and pressure difference establishment time, which can achieve accurate control of the switching timing of the four-way valve, so that the refrigerant inlet and outlet pressure difference of the four-way valve reaches a certain level, thereby improving the success rate of the four-way valve state switching, and thereby improving the stability of the air-conditioning system operation.

[0067] In some optional implementations, such as Figure 4 As shown, step 1051 includes:

[0068] Step 10511, determining the target temperature interval to which the outdoor ambient temperature belongs from at least two preset temperature intervals.

[0069] The at least two temperature intervals and the range of each temperature interval can be set according to actual needs. Figure 2 At least two temperature intervals in the corresponding embodiment are the same.

[0070] Step 10512, based on the correspondence between the preset temperature range and the pressure difference establishment time, determine the pressure difference establishment time corresponding to the outdoor ambient temperature as the second waiting time of the four-way valve.

[0071] As an example, let T be the current outdoor ambient temperature. If -30℃≤T<0℃, the corresponding second waiting time is 90s; if 0℃≤T<5℃, the corresponding second waiting time is 60s; if 5℃≤T, the corresponding second waiting time is 30s.

[0072] This embodiment can reduce the amount of data for calibrating the correspondence between the outdoor ambient temperature and the pressure difference establishment time by setting the pressure difference establishment time corresponding to at least two temperature intervals. The pressure difference establishment time can be quickly determined without calculation, thereby helping to reduce the complexity of air-conditioning system control and improve control efficiency.

[0073] In some optional implementations, step 1051 may be performed as follows:

[0074] Based on the pressure difference establishment time calculation formula obtained in advance through data fitting, the outdoor ambient temperature is calculated to obtain the pressure difference establishment time corresponding to the outdoor ambient temperature as the second waiting time of the four-way valve.

[0075] Specifically, different outdoor ambient temperatures and corresponding pressure difference establishment times may be recorded in advance, and a curve fitting may be performed based on the recorded data to obtain a calculation formula for the pressure difference establishment time. Figure 5 As shown, it shows a schematic diagram of curve fitting for outdoor ambient temperature and corresponding pressure difference establishment time. The solid line represents the actual recorded data, and the curve represents the fitted curve. The fitting formula of the curve is: y = -0.0476x 2 +3.7266x+9.7581, where x represents the outdoor ambient temperature and y represents the time for the pressure difference to be established. When determining the second waiting time, the current outdoor ambient temperature may be substituted into x in the formula to calculate the second waiting time.

[0076] By presetting the pressure difference establishment time calculation formula, this embodiment can accurately calculate the pressure difference establishment time and obtain a more accurate second waiting time, thereby more accurately controlling the state switching timing of the four-way valve and improving the stability and control efficiency of the air-conditioning system operation.

[0077] In some optional implementations, the method further includes:

[0078] In response to detecting that the pressure at the exhaust port of the compressor is greater than or equal to a preset pressure threshold, a fan of the air conditioner outdoor unit is started to reduce the pressure at the exhaust port.

[0079] Specifically, the pressure at the exhaust port can be detected by a pressure sensor installed at the exhaust port. When the pressure at the exhaust port is greater than or equal to the preset pressure threshold, it means that the refrigerant inlet and outlet pressure difference of the compressor is too large and the exhaust port pressure needs to be reduced quickly. At this time, turning on the fan can speed up the rate of reduction of the exhaust port pressure value.

[0080] Optionally, the corresponding relationship between pressure and fan speed can be set, and the fan speed can be adjusted in real time according to the pressure value to improve the pressure reduction efficiency and reduce power consumption.

[0081] This embodiment detects the pressure at the exhaust port of the compressor in real time and can quickly reduce the pressure of the compressor by starting the fan when the pressure is too high, thereby improving the safety and stability of the operation of the air-conditioning system.

[0082] Figure 6 This is a schematic diagram of the structure of a compressor control device in a defrosting process provided by an embodiment of the present application. Specifically comprising:

[0083] A starting module 601 is used to start the compressor of the air conditioner in response to triggering a defrost operation instruction for the air conditioner outdoor unit;

[0084] The first control module 602 is used to control the four-way valve included in the air conditioner to switch to the defrost state after the first waiting time has passed after the compressor is started, and control the air conditioner to start the defrost operation;

[0085] A first determination module 603 is used to control the compressor to stop in response to the end of the defrosting operation, and determine the current outdoor ambient temperature;

[0086] The second determination module 604 is used to determine the pressure balance time corresponding to the outdoor ambient temperature as the shutdown time of the compressor based on the corresponding relationship between the preset temperature and the pressure balance time;

[0087] The second control module 605 is used to control the air conditioner to start indoor heating operation after the compressor stops for a certain period of time.

[0088] In some optional implementations, the second determining module includes:

[0089] A first determining unit, configured to determine a target temperature interval to which the outdoor ambient temperature belongs from at least two preset temperature intervals;

[0090] The second determining unit is used to determine the pressure balance time corresponding to the target temperature range as the shutdown time of the compressor based on the correspondence between the preset temperature range and the pressure balance time.

[0091] In some optional implementations, the second control module includes:

[0092] A third determining unit is used to determine the pressure difference establishment time corresponding to the outdoor ambient temperature as the second waiting time of the four-way valve based on the corresponding relationship between the preset temperature and the pressure difference establishment time, and control the compressor to start;

[0093] The control unit is used to control the four-way valve to switch to the heating state when the second waiting time has passed after the compressor is started, so that the air conditioner performs a heating operation.

[0094] In some optional implementations, the third determining unit includes:

[0095] A first determining subunit is used to determine a target temperature interval to which the outdoor ambient temperature belongs from at least two preset temperature intervals;

[0096] The second determining subunit is used to determine the pressure difference establishment time corresponding to the outdoor ambient temperature as the second waiting time of the four-way valve based on the corresponding relationship between the preset temperature range and the pressure difference establishment time.

[0097] In some optional implementations, the third determining unit is further configured to:

[0098] Based on the pressure difference establishment time calculation formula obtained in advance through data fitting, the outdoor ambient temperature is calculated to obtain the pressure difference establishment time corresponding to the outdoor ambient temperature as the second waiting time of the four-way valve.

[0099] In some optional implementations, the device further includes:

[0100] The pressure reduction module is used to start the fan of the air conditioner outdoor unit in response to detecting that the pressure at the exhaust port of the compressor is greater than or equal to a preset pressure threshold, so as to reduce the pressure at the exhaust port.

[0101] The compressor control device in the defrosting process provided in this embodiment can be as follows Figure 6 The compressor control device in the defrost process shown in can execute all steps of the above compressor control methods in each defrost process, thereby achieving the technical effects of the above compressor control methods in each defrost process. Please refer to the above related description for details. For the sake of brevity, it will not be repeated here.

[0102] Figure 7 A structural schematic diagram of an air-conditioning system 700 provided in an embodiment of the present application, the air-conditioning system 700 includes: an indoor unit 701, an outdoor unit 702 and a controller 703, the outdoor unit includes a four-way valve 7021, a compressor 7022, and a temperature sensor 7033, the four-way valve, the compressor and the temperature sensor are all electrically connected to the controller, and the four-way valve, the indoor unit and the outdoor unit are connected in sequence through pipes.

[0103] The controller is used to execute the compressor control method in the defrosting process.

[0104] Optionally, the air conditioning system may further include a fan and a pressure sensor, wherein the fan is arranged in the outdoor unit, and the pressure sensor is arranged at the exhaust port of the compressor. When the controller receives a pressure value detected by the pressure sensor that is greater than or equal to a preset pressure threshold, the controller starts the fan to reduce the pressure at the exhaust port, thereby improving the safety and stability of the operation of the air conditioning system.

[0105] The air conditioning system provided by the embodiment of the present application controls the compressor and the four-way valve by executing the above-mentioned compressor control method through the controller, thereby controlling the start and stop timing of the compressor during the defrosting operation. In particular, after the defrosting is completed, the corresponding length of time for the compressor to stop is accurately controlled according to the current outdoor ambient temperature, so that the pressure difference between the refrigerant inlet and outlet of the compressor reaches a balance before starting the heating operation, thereby effectively reducing the impact of the refrigerant fluid on the compressor during the four-way valve reversing process, effectively solving the liquid compression problem of the compressor, and improving the reliability of the compressor during operation. In addition, the air conditioning system does not need to add any additional hardware devices, and only needs to control the start and stop timing of the compressor, thereby reducing the cost of solving the liquid compression problem.

[0106] Figure 8 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application, Figure 8The electronic device 800 shown includes: at least one processor 801, a memory 802, at least one network interface 804 and other user interfaces 803. The various components in the electronic device 800 are coupled together via a bus system 805. It is understood that the bus system 805 is used to achieve connection and communication between these components. In addition to the data bus, the bus system 805 also includes a power bus, a control bus and a status signal bus. However, for the sake of clarity, the bus system 805 is not described in detail. Figure 8 Various buses are labeled as bus system 805 .

[0107] The user interface 803 may include a display, a keyboard, or a pointing device (eg, a mouse, a trackball, a touch pad, or a touch screen).

[0108] It can be understood that the memory 802 in the embodiment of the present application can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. Among them, the non-volatile memory can 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 can 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 (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct RAM bus random access memory (DRRAM). The memory 802 described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0109] In some implementations, the memory 802 stores the following elements, executable units or data structures, or a subset thereof, or an extended set thereof: an operating system 8021 and an application program 8022 .

[0110] The operating system 8021 includes various system programs, such as a framework layer, a core library layer, a driver layer, etc., which are used to implement various basic services and process hardware-based tasks. The application 8022 includes various application programs, such as a media player (Media Player), a browser (Browser), etc., which are used to implement various application services. The program for implementing the method of the embodiment of the present application can be included in the application 8022.

[0111] In this embodiment, by calling the program or instruction stored in the memory 802, specifically, the program or instruction stored in the application 8022, the processor 801 is used to execute the method steps provided by each method embodiment, for example, including:

[0112] In response to triggering a defrost operation instruction to the air conditioner outdoor unit, the compressor of the air conditioner is started; at a moment when a first waiting time has passed after the compressor is started, the four-way valve included in the air conditioner is controlled to switch to the defrost state, and the air conditioner is controlled to start the defrost operation; in response to the end of the defrost operation, the compressor is controlled to stop, and the current outdoor ambient temperature is determined; based on the corresponding relationship between the preset temperature and the pressure balance time, the pressure balance time corresponding to the outdoor ambient temperature is determined as the shutdown time of the compressor; at a moment when the shutdown time has passed after the compressor is stopped, the air conditioner is controlled to start the indoor heating operation.

[0113] The method disclosed in the above embodiment of the present application can be applied to the processor 801, or implemented by the processor 801. The processor 801 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by the hardware integrated logic circuit or software instructions in the processor 801. The above processor 801 can be a general processor, a digital signal processor (Digital Signal Processor, DSP), an application-specific integrated circuit (Application Specific Integrated Circuit, ASIC), a field programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general processor can be a microprocessor or the processor can also be any conventional processor, etc. The steps of the method disclosed in the embodiment of the present application can be directly embodied as a hardware decoding processor to execute, or the hardware and software units in the decoding processor can be executed. The software unit can be located in a mature storage medium in the field such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory 802, and the processor 801 reads the information in the memory 802 and completes the steps of the above method in combination with its hardware.

[0114] It is understood that the embodiments described herein may be implemented in hardware, software, firmware, middleware, microcode, or a combination thereof. For hardware implementation, the processing unit may be implemented in one or more application specific integrated circuits (ASIC), digital signal processors (DSP), digital signal processing devices (DSPDevice, DSPD), programmable logic devices (PLD), field programmable gate arrays (FPGA), general purpose processors, controllers, microcontrollers, microprocessors, other electronic units for performing the above functions of the present application, or a combination thereof.

[0115] For software implementation, the technology described above in this article can be implemented by a unit that performs the functions described above in this article. The software code can be stored in a memory and executed by a processor. The memory can be implemented in the processor or outside the processor.

[0116] The electronic device provided in this embodiment may be Figure 8 The electronic device shown in can execute all steps of the compressor control method in each defrosting process described above, and thus achieve the technical effect of the compressor control method in each defrosting process described above. Please refer to the above related description for details. For the sake of brevity, it will not be repeated here.

[0117] The embodiment of the present application also provides a storage medium (computer-readable storage medium). The storage medium here stores one or more programs. The storage medium may include a volatile memory, such as a random access memory; the memory may also include a non-volatile memory, such as a read-only memory, a flash memory, a hard disk or a solid-state drive; the memory may also include a combination of the above-mentioned types of memory.

[0118] When one or more programs in the storage medium can be executed by one or more processors, the compressor control method in the defrosting process executed on the electronic device side can be implemented.

[0119] The processor is used to execute the program stored in the memory to implement the following steps of the compressor control method in the defrosting process performed on the electronic device side:

[0120] In response to triggering a defrost operation instruction to the air conditioner outdoor unit, the compressor of the air conditioner is started; at a moment when a first waiting time has passed after the compressor is started, the four-way valve included in the air conditioner is controlled to switch to the defrost state, and the air conditioner is controlled to start the defrost operation; in response to the end of the defrost operation, the compressor is controlled to stop, and the current outdoor ambient temperature is determined; based on the corresponding relationship between the preset temperature and the pressure balance time, the pressure balance time corresponding to the outdoor ambient temperature is determined as the shutdown time of the compressor; at a moment when the shutdown time has passed after the compressor is stopped, the air conditioner is controlled to start the indoor heating operation.

[0121] The professionals should further realize that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein 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 in terms of function in the above description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different circuits to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0122] The steps of the circuits or algorithms described in conjunction with the embodiments disclosed herein may be implemented using hardware, software modules executed by a processor, or a combination of the two. The software modules may be placed in a random access memory (RAM), a memory, a read-only memory (ROM), an electrically programmable ROM, an electrically erasable programmable ROM, a register, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

[0123] It should be understood that the terms used in the text are only for the purpose of describing specific example embodiments, and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used in the text may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The steps, processes, and operations described in the text are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0124] The above description is only a specific implementation of the present application, so that those skilled in the art can 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 can 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 will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A compressor control method during defrosting, characterized in that: The method comprises: In response to triggering a defrost operation instruction for an outdoor unit of an air conditioner, starting a compressor of the air conditioner; After the compressor is started, at a moment when a first waiting time has passed, the four-way valve included in the air conditioner is controlled to switch to a defrosting state, and the air conditioner is controlled to start a defrosting operation; In response to the defrosting operation being completed, controlling the compressor to stop, and determining the current outdoor ambient temperature; Based on the corresponding relationship between the preset temperature and the pressure balance time, determining the pressure balance time corresponding to the outdoor ambient temperature as the shutdown time of the compressor; At a moment when the shutdown time has elapsed after the compressor is shut down, the air conditioner is controlled to start an indoor heating operation.

2. The method according to claim 1, characterized in that The step of determining the pressure balance time corresponding to the outdoor ambient temperature as the shutdown time of the compressor based on the corresponding relationship between the preset temperature and the pressure balance time includes: Determining a target temperature interval to which the outdoor ambient temperature belongs from at least two preset temperature intervals; Based on the correspondence between the preset temperature interval and the pressure balance time, the pressure balance time corresponding to the target temperature interval is determined as the shutdown time of the compressor.

3. The method according to claim 1, characterized in that The controlling the air conditioner to start the indoor heating operation includes: Based on the correspondence between the preset temperature and the pressure difference establishment time, determining the pressure difference establishment time corresponding to the outdoor ambient temperature as the second waiting time of the four-way valve, and controlling the compressor to start; At the moment when the second waiting time has passed after the compressor is started, the four-way valve is controlled to switch to a heating state so that the air conditioner performs a heating operation.

4. The method according to claim 3, characterized in that The step of determining the pressure difference establishment time corresponding to the outdoor ambient temperature as the second waiting time of the four-way valve based on the corresponding relationship between the preset temperature and the pressure difference establishment time includes: Determining a target temperature interval to which the outdoor ambient temperature belongs from at least two preset temperature intervals; Based on the correspondence between the preset temperature range and the pressure difference establishment time, the pressure difference establishment time corresponding to the outdoor ambient temperature is determined as the second waiting time of the four-way valve.

5. The method according to claim 3, characterized in that: The step of determining the pressure difference establishment time corresponding to the outdoor ambient temperature as the second waiting time of the four-way valve based on the corresponding relationship between the preset temperature and the pressure difference establishment time includes: Based on the pressure difference establishment time calculation formula obtained in advance through data fitting, the outdoor ambient temperature is calculated to obtain the pressure difference establishment time corresponding to the outdoor ambient temperature as the second waiting time of the four-way valve.

6. The method according to any one of claims 1 to 5, characterized in that: The method further comprises: In response to detecting that the pressure at the exhaust port of the compressor is greater than or equal to a preset pressure threshold, a fan of the air conditioner outdoor unit is started to reduce the pressure at the exhaust port.

7. A compressor control device during defrosting, characterized in that: The device comprises: A starting module, configured to start a compressor of the air conditioner in response to triggering a defrost operation instruction for an outdoor unit of the air conditioner; A first control module, configured to control the four-way valve included in the air conditioner to switch to a defrost state after a first waiting time has passed after the compressor is started, and control the air conditioner to start a defrost operation; a first determining module, configured to control the compressor to stop in response to the end of the defrosting operation, and determine the current outdoor ambient temperature; A second determination module is used to determine the pressure balance time corresponding to the outdoor ambient temperature as the shutdown time of the compressor based on the corresponding relationship between the preset temperature and the pressure balance time; The second control module is used to control the air conditioner to start the indoor heating operation when the shutdown time has passed after the compressor is shut down.

8. An air conditioning system, characterized in that: The air conditioning system comprises: an indoor unit, an outdoor unit and a controller, the outdoor unit comprises a four-way valve, a compressor, and a temperature sensor, the four-way valve, the compressor and the temperature sensor are all electrically connected to the controller, and the four-way valve, the indoor unit and the outdoor unit are connected in sequence through pipelines; The controller is used to execute the compressor control method in the defrosting process described in any one of claims 1-6.

9. An electronic device, characterized in that: include: Memory for storing computer programs; A processor is used to execute the computer program stored in the memory, and when the computer program is executed, the compressor control method in the defrosting process described in any one of claims 1 to 6 is implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the compressor control method in the defrosting process described in any one of claims 1 to 6 is implemented.

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