Air source heat pump unit control method and device, storage medium and electronic equipment

Abstract

The invention discloses an air source heat pump unit control method and device, a storage medium and electronic equipment, and relates to the technical field of heat pump units, an air source heat pump unit comprises a four-way valve, and the method comprises the steps that calculation is conducted according to pressure domain data, temperature domain data and current domain data of the air source heat pump unit, the fault probability of the preset reversing fault of the four-way valve is obtained; when the fault probability is larger than a preset probability, it is determined that the preset reversing fault happens to the four-way valve; and controlling the air source heat pump unit to execute a preset repair action corresponding to the preset reversing fault so as to repair the preset reversing fault. According to the invention, the recognition accuracy of the reversing fault of the four-way valve can be effectively improved, and the operation reliability of the air source heat pump unit is improved.

Description

Technical Field

[0001] This application relates to the field of heat pump unit technology, specifically to a control method, device, storage medium, and electronic equipment for an air source heat pump unit. Background Technology

[0002] When air source heat pump units operate under harsh conditions such as low temperature and high humidity, the four-way valve is prone to switching failures. For example, the switching failure may not start (i.e., the valve core of the four-way valve is completely stuck due to mechanical wear, refrigerant liquid slugging, or impurities) or the cross-flow failure may occur (i.e., the valve core of the four-way valve is not fully switched to the position and cross-flow occurs in the middle position). When the switching failure fails to start, the operating mode of the air source heat pump unit will be completely invalidated. When the cross-flow failure occurs, the refrigerant on the high-pressure side and the low-pressure side will flow across each other, resulting in a sharp drop in energy efficiency.

[0003] Currently, relevant technologies typically employ dedicated reversing fault detection devices for four-way valves to monitor for reversing faults during switching. However, this approach is costly and susceptible to external influences, resulting in low accuracy in fault identification. Other technologies simply rely on pressure data to determine if a reversing fault has occurred, which also suffers from low accuracy. The inability to accurately identify and effectively repair reversing faults in four-way valves leads to poor operational reliability of air source heat pump units. Summary of the Invention

[0004] This application provides a control scheme for an air source heat pump unit, which can effectively improve the accuracy of identifying switching faults in four-way valves and improve the operational reliability of the air source heat pump unit.

[0005] The embodiments of this application provide the following technical solutions: According to one embodiment of this application, a control method for an air source heat pump unit is provided. The air source heat pump unit includes a four-way valve. The method includes: calculating the probability of a preset reversing fault occurring in the four-way valve based on pressure domain data, temperature domain data, and current domain data of the air source heat pump unit; determining that the four-way valve has experienced the preset reversing fault when the fault probability is greater than the preset probability; and controlling the air source heat pump unit to perform a preset repair action corresponding to the preset reversing fault to repair the preset reversing fault.

[0006] In some embodiments of this application, the pressure domain data includes high-pressure value and low-pressure value, the temperature domain data includes exhaust temperature, and the current domain data includes compressor current; the preset reversing fault includes a failure to start reversing fault, and the fault probability includes a first fault probability of the four-way valve experiencing the failure to start reversing fault; the calculation of the fault probability of the four-way valve experiencing the preset reversing fault based on the pressure domain data, temperature domain data, and current domain data of the air source heat pump unit includes: calculating the pressure difference and pressure difference change rate between the high-pressure value and the low-pressure value, the temperature change rate and temperature change value of the exhaust temperature, and the total harmonic distortion rate of the compressor current; and calculating the first fault probability based on the pressure difference, the pressure difference change rate, the temperature change rate, the temperature change value, and the total harmonic distortion rate.

[0007] In some embodiments of this application, the calculation of the first fault probability based on the pressure difference, the rate of change of the pressure difference, the rate of change of the temperature, the temperature change value, and the total harmonic distortion rate includes: when the maximum pressure difference is less than a preset first pressure difference and the rate of change of the pressure difference is less than or equal to a preset first rate of change for a preset first number of consecutive periods, a first failure probability is determined as a first probability; otherwise, the first failure probability is zero. When the rate of change of the temperature is greater than a preset second rate of change and the temperature change value is greater than a preset change value for a preset second number of consecutive periods, a second failure probability is determined as a second probability; otherwise, the second failure probability is zero. When the total harmonic distortion rate is greater than a preset first distortion rate and lasts for a first duration, a third failure probability is determined as a third probability; otherwise, the third failure probability is zero. The first failure probability, the second failure probability, and the third failure probability are summed to obtain the first fault probability.

[0008] In some embodiments of this application, the air source heat pump unit includes a compressor and an electronic expansion valve; the preset reversing fault includes a failure to start reversing fault; controlling the air source heat pump unit to perform a preset repair action corresponding to the preset reversing fault to repair the preset reversing fault includes: performing a first reversing repair action to increase the operating frequency of the compressor to a first rated frequency and adjust the opening of the electronic expansion valve to the maximum opening; within a second time period after performing the first reversing repair action, if the pressure difference is not greater than or equal to a preset second pressure difference and the total If the harmonic distortion rate is greater than a preset second distortion rate, a second commutation repair action is performed to intermittently energize the four-way valve and increase the compressor from the first rated frequency to the second rated frequency. If, within a third time period after the second commutation repair action is performed, the pressure difference is not greater than or equal to a preset second pressure difference and the total harmonic distortion rate is not greater than the preset second distortion rate, the second commutation repair action is repeated at intervals of the third time period until the pressure difference is greater than or equal to the preset second pressure difference and the total harmonic distortion rate is greater than the preset second distortion rate, or the action is repeated a preset number of times.

[0009] In some embodiments of this application, when performing the first reversing repair action or the second reversing repair action, the method further includes: when the high pressure value is greater than the preset pressure, controlling the air source heat pump unit to stop; or, when the coil temperature of the four-way valve is greater than the preset temperature, stopping the execution of the first reversing repair action or the second reversing repair action.

[0010] In some embodiments of this application, the pressure domain data includes high-pressure and low-pressure values, the temperature domain data includes evaporator inlet and outlet temperatures, and the current domain data includes compressor current and compressor voltage; the preset reversing fault includes a cross-flow fault, and the fault probability includes a second fault probability of the four-way valve experiencing the cross-flow fault; the calculation of the fault probability of the four-way valve experiencing the preset reversing fault based on the pressure domain data, temperature domain data, and current domain data of the air source heat pump unit includes: calculating the pressure imbalance rate between the high-pressure and low-pressure values, the inlet and outlet temperature difference between the evaporator inlet and outlet temperatures, and the fundamental phase difference between the compressor current and compressor voltage; and calculating the second fault probability based on the pressure imbalance rate, the inlet and outlet temperature difference, and the fundamental phase difference.

[0011] In some embodiments of this application, the step of calculating the second fault probability based on the pressure imbalance rate, the inlet and outlet temperature difference, and the fundamental phase difference includes: if the moving average of the pressure imbalance rate under a preset third consecutive number of times is less than the target imbalance rate, then the first leakage probability is determined as the fourth probability; otherwise, the first leakage probability is zero. If the inlet and outlet temperature difference is less than the target temperature difference, then the second leakage probability is determined as the fifth probability; otherwise, the second leakage probability is zero. If the fundamental phase difference is greater than a preset phase difference and lasts for a fifth duration, then the third leakage probability is determined as the sixth probability; otherwise, the third leakage probability is zero. The first leakage probability, the second leakage probability, and the third leakage probability are summed to obtain the second fault probability.

[0012] In some embodiments of this application, the target imbalance rate includes: the target imbalance rate is calculated according to the formula ψ1=ψ0*[1+k1*(Tc-Tc0)], where ψ1 is the target imbalance rate, ψ0 is the preset imbalance rate, k1 is the condensation temperature compensation coefficient, Tc is the actual condensation temperature, and Tc0 is the preset reference condensation temperature.

[0013] In some embodiments of this application, the target temperature difference includes: in cooling mode, adjusting a preset first temperature difference based on the difference between the actual ambient temperature and a preset cooling compensation temperature to obtain the target temperature difference; and in heating mode, adjusting a preset second temperature difference based on the difference between the actual ambient temperature and a preset heating compensation temperature to obtain the target temperature difference.

[0014] In some embodiments of this application, the air source heat pump unit includes a compressor, an electronic expansion valve, and a fan; the preset reversing fault includes a cross-flow fault; controlling the air source heat pump unit to perform a preset repair action corresponding to the preset reversing fault to repair the preset reversing fault includes: adjusting the opening of the electronic expansion valve to a target opening, wherein the target opening is equal to a preset base opening plus a compensation opening corresponding to the pressure imbalance rate; adjusting the operating frequency of the compressor to a target frequency every sixth time interval, wherein the target frequency is equal to a preset reference frequency multiplied by a frequency adjustment coefficient, the frequency adjustment coefficient being calculated based on the pressure imbalance rate and the target imbalance rate; adjusting the fan speed to a target speed every seventh time interval, wherein the target speed is equal to a preset base speed plus an adjustment speed, the adjustment speed being calculated based on the inlet and outlet temperature difference and the speed adjustment parameters corresponding to the unit's operating mode.

[0015] According to one embodiment of this application, an air source heat pump unit control device is provided. The air source heat pump unit includes a four-way valve. The device includes: a calculation module, used to: calculate based on pressure domain data, temperature domain data, and current domain data of the air source heat pump unit to obtain the failure probability of the four-way valve experiencing a preset reversing fault; a determination module, used to: determine that the four-way valve has experienced the preset reversing fault when the failure probability is greater than the preset probability; and a control module, used to: control the air source heat pump unit to execute a preset repair action corresponding to the preset reversing fault to repair the preset reversing fault.

[0016] According to another embodiment of this application, a storage medium stores a computer program thereon, which, when executed by a processor of an electronic device, causes the electronic device to perform the methods described in the embodiments of this application.

[0017] According to another embodiment of this application, an electronic device may include: a memory storing a computer program; and a processor reading the computer program stored in the memory to execute the methods described in the embodiments of this application.

[0018] According to another embodiment of this application, a computer program product or computer program includes computer instructions stored in a computer-readable storage medium. A processor of an electronic device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the electronic device to perform the methods provided in the various optional implementations described in the embodiments of this application.

[0019] In this embodiment, the air source heat pump unit includes a four-way valve. Based on the pressure domain data, temperature domain data, and current domain data of the air source heat pump unit, the failure probability of the four-way valve experiencing a preset reversing fault is calculated. When the failure probability is greater than the preset probability, it is determined that the four-way valve has experienced the preset reversing fault. The air source heat pump unit is controlled to execute a preset repair action corresponding to the preset reversing fault to repair the preset reversing fault.

[0020] By combining pressure domain data, temperature domain data, and current domain data of the air source heat pump unit in this embodiment, the probability of a preset reversing fault occurring in the four-way valve can be accurately calculated. When this fault probability is greater than the preset probability, the occurrence of the preset reversing fault in the four-way valve can be further accurately determined. Since the preset reversing fault in the four-way valve is accurately identified, executing the preset repair action can effectively repair the preset reversing fault. This effectively improves the accuracy of identifying reversing faults in the four-way valve and enhances the operational reliability of the air source heat pump unit. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A flowchart of an air source heat pump unit control method according to an embodiment of this application is shown.

[0023] Figure 2 An architectural diagram of an air source heat pump unit according to an embodiment of this application is shown.

[0024] Figure 3 A block diagram of an air source heat pump unit control device according to an embodiment of this application is shown.

[0025] Figure 4 A block diagram of an electronic device according to an embodiment of this application is shown. Detailed Implementation

[0026] The present disclosure will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the embodiments provided herein are merely illustrative of the present disclosure and are not intended to limit the present disclosure. Furthermore, the embodiments provided below are some embodiments for implementing the present disclosure, and not all embodiments for implementing the present disclosure. Unless otherwise specified, the technical solutions described in the embodiments of the present disclosure can be implemented in any combination. It should be noted that, in the embodiments of this disclosure, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a method or apparatus that includes a list of elements includes not only the elements expressly described, but also other elements not expressly listed, or elements inherent to implementing the method or apparatus. Without further limitations, an element defined by the phrase "comprising a..." does not exclude the presence of other related elements (e.g., steps in the method or units in the apparatus, such as portions of circuitry, processors, programs, or software, etc.) in the method or apparatus that includes that element. For example, the air source heat pump unit control method provided in this disclosure includes a series of steps, but the air source heat pump unit control method provided in this disclosure is not limited to the steps described. Similarly, the air source heat pump unit control device provided in this disclosure includes a series of units, but the device provided in this disclosure is not limited to the units explicitly described, but may also include units that need to be set up to obtain relevant information or to process information. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure. It is understood that in the specific implementation of this application, relevant data is involved. When the embodiments in this application are applied to specific products or technologies, user permission or consent is required, and the collection, use and processing of relevant data must comply with the relevant laws, regulations and standards of the relevant countries and regions.

[0027] When air source heat pump units operate under harsh conditions such as low temperature and high humidity, the four-way valve is prone to switching failures. For example, the switching failure may not start (i.e., the valve core of the four-way valve is completely stuck due to mechanical wear, refrigerant liquid slugging, or impurities) or the cross-flow failure may occur (i.e., the valve core of the four-way valve is not fully switched to the position and cross-flow occurs in the middle position). When the switching failure fails to start, the operating mode of the air source heat pump unit will be completely invalidated. When the cross-flow failure occurs, the refrigerant on the high-pressure side and the low-pressure side will flow across each other, resulting in a sharp drop in energy efficiency.

[0028] Currently, relevant technologies typically employ dedicated reversing fault detection devices for four-way valves to monitor for reversing faults during switching. However, this approach is costly and susceptible to external influences, resulting in low accuracy in fault identification. Other technologies simply rely on pressure data to determine if a reversing fault has occurred, which also suffers from low accuracy. The inability to accurately identify and effectively repair reversing faults in four-way valves leads to poor operational reliability of air source heat pump units.

[0029] To address these issues, this application provides a control scheme for an air source heat pump unit, which can effectively improve the accuracy of identifying swivel faults in the four-way valve and enhance the operational reliability of the air source heat pump unit.

[0030] The following is a detailed description of the relevant embodiments of the air conditioning control scheme provided in this application.

[0031] Figure 1 A flowchart illustrating an embodiment of an air source heat pump unit control method according to this application is shown. The execution entity of this air conditioning control method can be a control module with processing capabilities. The control module can be installed in electronic devices such as air source heat pump units, remote controls, wired controllers, mobile phones, computers, smartwatches, and other home appliances, and the control module may include at least a memory and a processor.

[0032] In one embodiment of this application, the control module, which serves as the execution body of the air source heat pump unit control method, is specifically disposed within the air source heat pump unit. The control module may include a processor and a memory, i.e., the air conditioner includes the processor and memory, and the memory stores a computer program. Therefore, the processor in the air source heat pump unit can read the computer program stored in the memory to execute the methods of the various embodiments of this application.

[0033] like Figure 2 The diagram illustrates an example system architecture of an air-source heat pump unit. The unit may include a compressor 210, a four-way valve 220, a first heat exchanger 230 (i.e., an air-side heat exchanger), an economizer 240, and a second heat exchanger 250 (i.e., a water-side heat exchanger). A main electronic expansion valve 260 is installed on the main line between the economizer 240 and the first heat exchanger 230, and an auxiliary electronic expansion valve 270 is installed on the auxiliary line. The suction port of the compressor 210 is connected to the first port of the four-way valve 220, and the discharge port of the compressor 210 is connected to the second port of the four-way valve 220. The third port of the four-way valve 220 is connected to the first heat exchanger 230. The fourth port of the four-way valve 220 is connected to the second heat exchanger 250.

[0034] like Figure 1 As shown, the air source heat pump unit control method may include steps S110 to S130.

[0035] Step S110: Calculate the failure probability of the four-way valve experiencing a preset reversing fault based on the pressure domain data, temperature domain data, and current domain data of the air source heat pump unit. Step S120: When the failure probability is greater than the preset probability, determine that the four-way valve has experienced a preset reversing failure. Step S130: Control the air source heat pump unit to perform the preset repair action corresponding to the preset commutation fault, so as to repair the preset commutation fault.

[0036] After the four-way valve in the air source heat pump unit is activated and reversed, it can continuously monitor and collect pressure, temperature, and current domain data of the air source heat pump unit in real time. Pressure domain data includes pressure-related data such as high-pressure and low-pressure values. Temperature domain data includes temperature-related data such as exhaust temperature, evaporator inlet temperature, and evaporator outlet temperature. Current domain data includes current-related data such as compressor current and compressor voltage.

[0037] Pressure domain data, temperature domain data, and current domain data reflect the state of the air source heat pump unit when the four-way valve switches from three different dimensions. By combining the pressure domain data, temperature domain data, and current domain data for calculation, the probability of the four-way valve experiencing a preset switching failure can be accurately calculated. The higher the failure probability, the greater the possibility of the four-way valve experiencing a preset switching failure. Among them, preset switching failures can include failures to start switching (i.e., complete jamming, where the valve core of the four-way valve cannot switch due to mechanical wear, refrigerant liquid slugging, or impurities) or cross-flow failures (i.e., cross-flow in the middle position, where the valve core of the four-way valve is not fully switched to the correct position, causing refrigerant to flow between the high-pressure side and the low-pressure side).

[0038] A preset probability is set for the preset reversing fault. When the fault probability is greater than the preset probability, the four-way valve is further accurately determined to have the preset reversing fault. Then, the air source heat pump unit is controlled to execute the preset repair action corresponding to the preset reversing fault. Since the four-way valve is accurately determined to have the preset reversing fault, the preset repair action can effectively repair the preset reversing fault.

[0039] In summary, by combining pressure domain data, temperature domain data, and current domain data of the air source heat pump unit using the method described in this embodiment, the probability of a preset reversing fault occurring in the four-way valve can be accurately calculated. Furthermore, when this fault probability exceeds the preset probability, the occurrence of the preset reversing fault in the four-way valve can be further accurately determined. Since the preset reversing fault in the four-way valve is accurately identified, executing the preset repair action can effectively repair the fault. This significantly improves the accuracy of identifying reversing faults in the four-way valve and enhances the operational reliability of the air source heat pump unit.

[0040] The following description Figure 1 Further optional specific embodiments are provided for each step performed when controlling an air source heat pump unit under the example.

[0041] In one embodiment, the pressure domain data includes high pressure value and low pressure value, the temperature domain data includes exhaust temperature, and the current domain data includes compressor current; the preset reversing fault includes a failure to start reversing fault, and the fault probability includes a first fault probability of the four-way valve failing to start reversing fault; in step S110, the fault probability of the four-way valve failing to start reversing fault is calculated based on the pressure domain data, temperature domain data, and current domain data of the air source heat pump unit, which may include: calculating the pressure difference and pressure difference change rate between the high pressure value and the low pressure value, the temperature change rate and temperature change value of the exhaust temperature, and the total harmonic distortion rate of the compressor current; and calculating the first fault probability based on the pressure difference, pressure difference change rate, temperature change rate, temperature change value, and total harmonic distortion rate.

[0042] For air source heat pump units, they can continuously operate according to a predetermined cycle TS Collect data in the pressure domain, temperature domain, and current domain. Predetermined period T S It can be set according to the actual situation, for example, T S This can be equal to 2 seconds or 2.5 seconds, etc. The pressure domain data can include the high-pressure value Ph (i.e., the pressure value on the high-pressure side of the compressor) and the low-pressure value Pl (i.e., the pressure value on the low-pressure side of the compressor). The temperature domain data includes the exhaust temperature T. 排 (That is, the temperature on the compressor discharge side). Current domain data includes compressor current I (that is, the compressor current).

[0043] Then, the pressure difference at time t is ΔP(t) = Ph(t) - Pl(t), where Ph(t) is the high-pressure value at time t, and Pl(t) is the low-pressure value at time t. The rate of change of pressure difference is dΔP / dt = (ΔP(t) - ΔP(t)) / T S Temperature change rate L 温 =dT 排 / dt, temperature change ΔT 排 (t) = T 排 (tz)-T 排 (t), T 排 (tz) represents the exhaust temperature at time tz, T 排 (t) represents the exhaust temperature at time t, where z can be set according to the actual situation, for example, z can be equal to 10 seconds.

[0044] The compressor current can be decomposed into fundamental and harmonic components using Fast Fourier Transform (FFT). The effective value of the fundamental current I1 can be calculated based on the fundamental component, and the effective value of the harmonic current can be calculated based on the harmonic components. The total harmonic distortion rate THD = (Ih / I1) * 100%, where Ih is equal to the sum of the effective values ​​of all harmonic currents.

[0045] Differential pressure, differential pressure change rate, temperature change rate, temperature change value, and total harmonic distortion rate can reflect the operating status of the air source heat pump unit when the four-way valve switches in multiple dimensions. The first fault probability is calculated by combining differential pressure, differential pressure change rate, temperature change rate, temperature change value, and total harmonic distortion rate. This first fault probability can accurately reflect the possibility of the four-way valve failing to start and switching.

[0046] Furthermore, in one embodiment, a first fault probability is calculated based on the pressure difference, the rate of change of the pressure difference, the rate of change of temperature, the temperature change value, and the total harmonic distortion rate. Specifically, this may include: When the maximum pressure difference is less than the preset first pressure difference and the rate of change of pressure difference under the first preset number of consecutive cycles is less than or equal to the preset first rate of change, the first failure probability is determined as the first probability; otherwise, the first failure probability is zero. When the rate of change of temperature under the second preset number of consecutive cycles is greater than the preset second rate of change and the temperature change value is greater than the preset change value, the second failure probability is determined as the second probability; otherwise, the second failure probability is zero. When the total harmonic distortion rate is greater than the preset first distortion rate and lasts for a first duration, the third failure probability is determined as the third probability; otherwise, the third failure probability is zero. The first failure probability, the second failure probability, and the third failure probability are summed to obtain the first failure probability.

[0047] Calculate the pressure difference ΔP(t) and the rate of change of pressure difference dΔP / dt for C1 consecutive times (C1 can be between 10 and 15 times). If the maximum pressure difference ΔPmax in C1 times is less than the preset first pressure difference P1 (P1 can be between 0.15 MPa and 0.5 MPa), and the rate of change of pressure difference dΔP / dt under the preset first number of consecutive times (Cs1, where Cs1 is less than or equal to C1) in C1 times is less than or equal to the preset first rate of change d1 (d1 can be between 0.03 MPa / s and 0.3 MPa / s), then determine the first failure probability KH-1 as the first probability (the first probability can be between 35% and 50%). Otherwise, determine the first failure probability KH-1 = 0.

[0048] Furthermore, the rate of temperature change L is calculated by performing C2 consecutive calculations (e.g., C2 can be between 5 and 10 calculations). 温 And the temperature change value ΔT is calculated according to the time interval z. 排 (t), where the temperature change rate L under the second consecutive preset number (Cs2, where Cs2 is less than or equal to C2) 温 All are greater than the preset second rate of change d2 (e.g., d2 can be between 1.2℃ / S and 2.0℃ / S), and the temperature change value ΔT 排 (t) is greater than the preset change value ΔT 设 If the probability of failure to start is KH-2, then the second probability of failure to start is determined as the second probability (e.g., the second probability can be between 25% and 35%); otherwise, the second probability of failure to start is KH-2 = 0.

[0049] Furthermore, the total harmonic distortion (THD) is continuously calculated. If the THD is greater than the preset first distortion rate THD1 (e.g., THD1 can be between 12% and 18%) and lasts for a first duration (e.g., 5 seconds), then the third failure probability KH-3 is determined as the third probability (e.g., the third probability can be between 20% and 30%). Otherwise, the third failure probability KH-3 = 0.

[0050] Finally, the first failure probability KH-S = KH-1 + KH-2 + KH-3. Using this embodiment, the first failure probability is calculated by combining differential pressure, differential pressure change rate, temperature change rate, temperature change value, and total harmonic distortion rate, which can further improve the accuracy of the first failure probability. When the first failure probability is greater than the preset probability, it can be accurately determined that the four-way valve has experienced a failure to start and switch.

[0051] In one embodiment, the air source heat pump unit includes a compressor and an electronic expansion valve (e.g., as shown in the image). Figure 2 The main electronic expansion valve 260 shown); preset commutation faults include failure to start commutation faults; in step S130, the air source heat pump unit is controlled to perform preset repair actions corresponding to the preset commutation faults to repair the preset commutation faults, which may include: Perform the first reversing repair action to increase the compressor's operating frequency to the first rated frequency and adjust the opening of the electronic expansion valve to the maximum opening. If, within a second time period after the first reversing repair action is performed, the pressure difference is not greater than or equal to the preset second pressure difference and the total harmonic distortion rate is not greater than the preset second distortion rate, then the second reversing repair action is performed to intermittently energize the four-way valve and increase the compressor from the first rated frequency to the second rated frequency. If, within the third time interval after the second commutation repair action begins, the pressure difference is not greater than or equal to the preset second pressure difference and the total harmonic distortion rate is not greater than the preset second distortion rate, then the second commutation repair action is repeated at a third time interval until the pressure difference is greater than or equal to the preset second pressure difference and the total harmonic distortion rate is greater than the preset second distortion rate, or the preset number of repetitions is repeated.

[0052] After confirming that the four-way valve is experiencing a failure to start and reverse, first perform a first-level reversing repair action ("Level 1 Repair"), followed by a second-level reversing repair action ("Level 2 Repair"). Through these two repair actions, the failure to start and reverse can be successfully and reliably repaired.

[0053] Executing the first reversing repair action increases the compressor's operating frequency to the first rated frequency E1 and adjusts the electronic expansion valve opening to its maximum (100%). Within a second time period (e.g., 30 seconds) after executing the first reversing repair action, if at some point the differential pressure is greater than or equal to the preset second differential pressure P2 and the total harmonic distortion (THD) is greater than the preset second distortion rate THD2, it indicates that the reversing failure has been successfully repaired. Conversely, if within the second time period, the differential pressure is not greater than or equal to the preset second differential pressure and the THD is not greater than the preset second distortion rate, it indicates that the reversing failure has not been successfully repaired, and the first second reversing repair action is then executed again. The first rated frequency E1, the preset second differential pressure P2, and the preset second distortion rate THD2 can be set according to actual conditions; this application does not impose any special limitations on them.

[0054] Executing the first second reversing repair action involves intermittently energizing the four-way valve and increasing the compressor's operating frequency from the first rated frequency E1 to the second rated frequency E2. For example, the second reversing repair action begins at time O1, with intermittent energization meaning "energized from O1 to O2, not energized from O2 to O3, energized from O3 to O4," and so on until the third duration is reached. At time O1, the compressor will operate from the first rated frequency E1 to the second rated frequency E2. The second rated frequency E2 can be set according to actual conditions; for example, in one example, E2 can be between E1*110% and E1*120%.

[0055] If, within the third time period after the second commutation repair action is initiated, the differential pressure is greater than or equal to the preset second differential pressure and the total harmonic distortion rate is greater than the preset second distortion rate at a certain moment, it indicates that the commutation failure cannot be initiated and has been successfully repaired; conversely, if, within the third time period, the differential pressure is not greater than or equal to the preset second differential pressure and the total harmonic distortion rate is not greater than the preset second distortion rate, it indicates that the commutation failure cannot be initiated and has not been successfully repaired.

[0056] If the commutation fault cannot be initiated and is not successfully repaired, the second commutation repair action will be repeated at a third time interval (i.e., the interval between two second commutation repair actions is the third time interval, for example, the third time interval can be between 10 and 20 seconds) until "the differential pressure is greater than or equal to the preset second differential pressure and the total harmonic distortion rate is greater than the preset second distortion rate" within the third time interval after the second commutation repair action is started. This indicates that the commutation fault cannot be initiated and has been successfully repaired, and the second commutation repair action will no longer be executed. Alternatively, the action will be repeated a preset number of times (e.g., 2 or 3 times). This indicates that the commutation fault cannot be initiated and has not been successfully repaired, and the second commutation repair action will also no longer be executed.

[0057] Furthermore, in one embodiment, when performing the first reversing repair action or the second reversing repair action, it may also include: when the high pressure value is greater than the preset pressure, controlling the air source heat pump unit to stop; or, when the coil temperature of the four-way valve is greater than the preset temperature, stopping the execution of the first reversing repair action or the second reversing repair action.

[0058] If the high pressure value is found to be greater than the preset pressure (e.g., 4.0 MPa) when performing the first or second reversing repair action, the air source heat pump unit will be directly controlled to stop. The high pressure value upper limit protection can prevent the air source heat pump unit from malfunctioning due to the repair action.

[0059] If the coil temperature of the four-way valve is found to be higher than the preset temperature when performing the first or second reversing repair action, the first or second reversing repair action should be stopped to avoid damage to the four-way valve during the repair action.

[0060] In one embodiment, the pressure domain data includes high pressure and low pressure values, the temperature domain data includes evaporator inlet temperature and evaporator outlet temperature, and the current domain data includes compressor current and compressor voltage; the preset reversing fault includes a gas leakage fault, and the fault probability includes a second fault probability of the four-way valve experiencing a gas leakage fault; in step S110, the fault probability of the four-way valve experiencing a preset reversing fault is calculated based on the pressure domain data, temperature domain data, and current domain data of the air source heat pump unit, including: calculating the pressure imbalance rate between the high pressure value and the low pressure value, the inlet and outlet temperature difference between the evaporator inlet temperature and the evaporator outlet temperature, and the fundamental phase difference between the compressor current and the compressor voltage; and calculating the second fault probability based on the pressure imbalance rate, the inlet and outlet temperature difference, and the fundamental phase difference.

[0061] For air source heat pump units, they can continuously operate according to a predetermined cycle T S Collect data in the pressure domain, temperature domain, and current domain. Predetermined period T S It can be set according to the actual situation, for example, T S This can be equal to 2 seconds or 2.5 seconds, etc. The pressure domain data can include the high-pressure value Ph (i.e., the compressor high-pressure side pressure) and the low-pressure value Pl (i.e., the compressor low-pressure side pressure). The temperature domain data can include the evaporator inlet temperature T. e进 and evaporator outlet temperature T e出 The current domain data includes the compressor current I (i.e., the compressor current) and the compressor voltage V.

[0062] Subsequently, the pressure imbalance rate at time t is ψ = |Ph - Pl| / Ph * 100%. The inlet and outlet temperature difference ΔTe = T. e进 -T e出By performing Fourier transform (FFT) on the synchronously acquired compressor current I and compressor voltage V, the voltage phase and current phase can be obtained. The fundamental phase difference can be equal to the voltage phase minus the current phase.

[0063] Pressure imbalance rate, inlet and outlet temperature difference, and fundamental phase difference can reflect the operating status of the air source heat pump unit when the four-way valve switches in multiple dimensions. The second fault probability is calculated by combining the pressure imbalance rate, inlet and outlet temperature difference, and fundamental phase difference. This second fault probability can accurately reflect the possibility of the four-way valve experiencing a gas leakage fault.

[0064] Furthermore, in one embodiment, a second fault probability is calculated based on the pressure imbalance rate, the inlet and outlet temperature difference, and the fundamental phase difference. Specifically, this may include: If the moving average of the pressure imbalance rate under the third consecutive preset count is less than the target imbalance rate, then the first leakage probability is determined as the fourth probability; otherwise, the first leakage probability is zero. If the inlet and outlet temperature difference is less than the target temperature difference, then the second leakage probability is determined as the fifth probability; otherwise, the second leakage probability is zero. If the fundamental phase difference is greater than the preset phase difference and lasts for the fifth duration, then the third leakage probability is determined as the sixth probability; otherwise, the third leakage probability is zero. The first leakage probability, the second leakage probability, and the third leakage probability are summed to obtain the second fault probability.

[0065] The pressure imbalance rate is calculated by continuously setting a third preset number D1 (e.g., D1 could be 5 times, etc.). The moving average value ψ of the pressure imbalance rate after D1 times is then calculated. 平 If the probability is less than the target imbalance rate ψ1, then the probability of the first gas slug run KC-1 is determined to be the fourth probability (e.g., the fourth probability can be between 30% and 40%). Otherwise, the probability of the first gas slug run KC-1 is determined to be 0.

[0066] If the inlet and outlet temperature difference ΔTe is less than the target temperature difference M, then the second gas leakage probability KC-2 is determined to be the fifth probability (e.g., the fifth probability can be between 35% and 45%). Otherwise, the second gas leakage probability KC-2 is determined to be 0.

[0067] If the fundamental phase difference θ is greater than the preset phase difference (e.g., the preset phase difference can be between 4° and 8°) and lasts for a fifth duration (e.g., 10 seconds or 12 seconds), then the third air gap probability KC-1 is determined to be the sixth probability (e.g., the sixth probability can be between 20% and 30%). Otherwise, the third air gap probability KC-3 = 0.

[0068] Finally, the second failure probability KC-S = KC-1 + KC-2 + KC-3. Using this embodiment, the second failure probability is calculated by combining the pressure imbalance rate, inlet / outlet temperature difference, and fundamental phase difference, which can further improve the accuracy of the second failure probability. When the second failure probability is greater than the preset probability, a gas leakage fault in the four-way valve can be accurately determined.

[0069] Furthermore, in one embodiment, the target imbalance rate ψ1 may include: calculating the target imbalance rate according to the formula ψ1=ψ0*[1+k1*(Tc-Tc0)], where ψ1 is the target imbalance rate, ψ0 is the preset imbalance rate, k1 is the condensation temperature compensation coefficient, Tc is the actual condensation temperature, and Tc0 is the preset reference condensation temperature. With this implementation, the target imbalance rate ψ1 can be dynamically adjusted according to the actual condensation temperature, further improving the accuracy of the second fault probability.

[0070] The real-time actual condensing temperature can be equal to the saturation temperature corresponding to the real-time high-pressure value. The preset imbalance rate can be set according to actual conditions; for example, the preset imbalance rate can be between 20% and 40%, and different preset imbalance rates can be set for cooling and heating modes. In some methods, the condensing temperature compensation coefficient can be a predetermined compensation coefficient. In other methods, when the actual condensing temperature is higher than the preset reference condensing temperature, the refrigerant density decreases, and the cross-flow behavior is more pronounced under the same pressure difference. In this case, the predetermined compensation coefficient can be adjusted according to the temperature difference between the actual condensing temperature and the preset reference condensing temperature. The adjusted predetermined compensation coefficient, as the condensing temperature compensation coefficient, can further improve the accuracy of the second fault probability; for example, condensing temperature compensation coefficient = predetermined compensation coefficient + (temperature difference * preset ratio), where the preset ratio can be between 0.1% and 0.8%. The preset reference condensing temperature can be set according to actual conditions; for example, the preset reference condensing temperature can be between 40℃ and 50℃.

[0071] Furthermore, in one embodiment, the target temperature difference includes: in cooling mode, adjusting a preset first temperature difference based on the difference between the actual ambient temperature and a preset cooling compensation temperature to obtain a target temperature difference; and in heating mode, adjusting a preset second temperature difference based on the difference between the actual ambient temperature and a preset heating compensation temperature to obtain a target temperature difference.

[0072] For the cooling mode, a preset first temperature difference M1 is set, based on the real-time actual ambient temperature T. 环 and preset cooling compensation temperature T 补1 The difference ΔT1 is used to adjust the preset first temperature difference M1 to obtain the target temperature difference M2 in cooling mode. Specifically, the actual ambient temperature T 环 Greater than the preset cooling compensation temperature T 补1When M2 = M1 + (ΔT1 * 0.1℃) / 2, conversely, the actual ambient temperature T 环 Less than or equal to the preset cooling compensation temperature T 补1 At that time, M2 = M1. Wherein, the preset first temperature difference M1 and the preset cooling compensation temperature T... 补1 It can be set according to actual conditions. For example, the preset first temperature difference M1 can be between 2℃ and 6℃, and the preset cooling compensation temperature T can be set to... 补1 It can be located between 25℃ and 35℃.

[0073] For the heating mode, a preset second temperature difference M3 is set, based on the real-time actual ambient temperature T. 环 and preset heating compensation temperature T 补2 The difference ΔT2 is used to adjust the preset second temperature difference M2 to obtain the target temperature difference M4 in the heating mode. Specifically, the actual ambient temperature T 环 Greater than the preset cooling compensation temperature T 补1 When M4 = M3 + ΔT2 * 0.1℃, conversely, the actual ambient temperature T 环 Less than or equal to the preset cooling compensation temperature T 补1 At that time, M4 = M3. This includes the preset second temperature difference M2 and the preset heating compensation temperature T. 补2 It can be set according to actual conditions. For example, the preset second temperature difference M2 can be between 3℃ and 8℃, and the preset heating compensation temperature T can be set to... 补2 It can be located between -10℃ and 0℃.

[0074] In one embodiment, the air source heat pump unit includes a compressor, an electronic expansion valve, and a fan; the preset reversing fault includes a cross-flow fault; step S130, controlling the air source heat pump unit to perform a preset repair action corresponding to the preset reversing fault to repair the preset reversing fault, may include: adjusting the opening of the electronic expansion valve to a target opening, wherein the target opening is equal to a preset base opening plus a compensation opening corresponding to the pressure imbalance rate; adjusting the operating frequency of the compressor to a target frequency every sixth time interval, wherein the target frequency is equal to a preset reference frequency multiplied by a frequency adjustment coefficient, the frequency adjustment coefficient being calculated based on the pressure imbalance rate and the target imbalance rate; adjusting the fan speed to a target speed every seventh time interval, wherein the target speed is equal to a preset base speed plus an adjustment speed, the adjustment speed being calculated based on the inlet and outlet temperature difference and the speed adjustment parameters corresponding to the unit's operating mode.

[0075] The pre-defined repair actions after confirming a gas leakage fault in the four-way valve can include: adjusting the opening of the electronic expansion valve to the target opening, adjusting the compressor's operating frequency to the target frequency every six hours, and adjusting the fan speed to the target speed every seven hours. This method can successfully and reliably repair the gas leakage fault.

[0076] Specifically, the opening of the electronic expansion valve is adjusted to the target opening, which is equal to the preset base opening H plus the compensation opening K2 corresponding to the pressure imbalance rate. The compensation opening K2 corresponding to the pressure imbalance rate calculated in real time can be found in the preset opening table. In other words, K2 is dynamically corrected based on the pressure imbalance rate.

[0077] Specifically, the target frequency is dynamically calculated every six time intervals (e.g., the sixth time interval can be between 10S and 20S), and the compressor's operating frequency is adjusted to the target frequency. This target frequency is calculated as: preset reference frequency multiplied by f * frequency adjustment coefficient. The frequency adjustment coefficient is calculated based on the pressure imbalance rate and the target imbalance rate. In one method, the frequency adjustment coefficient = [1 + (ψ1 - ψ) / 2], where ψ1 is the target imbalance rate and ψ is the pressure imbalance rate calculated in real time.

[0078] Specifically, the target rotational speed is dynamically calculated every seventh time interval (e.g., the sixth time interval can be within 30 seconds), and the fan (which can be set up as follows) is also considered. Figure 2 The speed of the first heat exchanger (near 230) is adjusted to the target speed. The target speed = preset base speed RPM + adjustment speed. The adjustment speed is calculated based on the inlet and outlet temperature difference and the speed adjustment parameters corresponding to the unit's operating mode. In one method, the adjustment speed = 20% * (M - ΔTe) / 4. The speed adjustment parameter corresponding to the unit's operating mode (cooling mode or heating mode) is the target temperature difference M. In cooling mode, the target temperature difference M = M2; in heating mode, the target temperature difference M = M4. ΔTe is the inlet and outlet temperature difference.

[0079] Furthermore, in some methods, the compressor's maximum frequency can be limited to ≤ a preset limit frequency (e.g., 80Hz); when adjusting the compressor's operating frequency every sixth interval, the operating frequency can change by a maximum preset variation frequency (e.g., 5Hz). In some methods, the fan's minimum speed can be limited (e.g., 300RPM); when adjusting the fan's speed every seventh interval, the speed can change by a maximum preset variation value (e.g., 50 RPM).

[0080] Furthermore, in one embodiment, after determining that a gas leakage fault has occurred in the four-way valve and executing the aforementioned preset repair actions: in heating mode, if a pressure imbalance rate ψ > ψ1 is detected and remains stable for a preset duration (e.g., 30 seconds), and ΔTe > M4, then the gas leakage fault is determined to be successfully repaired; in cooling mode, if a pressure imbalance rate ψ > ψ1 is detected and remains stable for a preset duration (e.g., 30 seconds), and ΔTe > M2, then the gas leakage fault is determined to be successfully repaired. If the gas leakage fault is not successfully repaired within the preset monitoring time of "5 minutes" after executing the aforementioned preset repair actions, then the repair is deemed to have failed, and the execution of the aforementioned preset repair actions is terminated.

[0081] To facilitate better implementation of the air source heat pump unit control method provided in this application, this application also provides an air source heat pump unit control device based on the above-described air source heat pump unit control method. The meanings of the terms used are the same as in the above-described air source heat pump unit control method, and specific implementation details can be found in the descriptions in the method embodiments. Figure 3 A block diagram of an air source heat pump unit control device according to an embodiment of this application is shown.

[0082] like Figure 3 As shown, the air source heat pump unit control device 300 may include: a calculation module 310, which can be used to calculate the probability of the four-way valve experiencing a preset reversing fault based on the pressure domain data, temperature domain data, and current domain data of the air source heat pump unit; a determination module 320, which can be used to determine that the four-way valve has experienced the preset reversing fault when the fault probability is greater than the preset probability; and a control module 330, which can be used to control the air source heat pump unit to perform a preset repair action corresponding to the preset reversing fault in order to repair the preset reversing fault.

[0083] In some embodiments of this application, the pressure domain data includes high-pressure value and low-pressure value, the temperature domain data includes exhaust temperature, and the current domain data includes compressor current; the preset reversing fault includes a failure to start reversing fault, and the fault probability includes a first fault probability of the four-way valve experiencing the failure to start reversing fault; when calculating the fault probability of the four-way valve experiencing the preset reversing fault based on the pressure domain data, temperature domain data, and current domain data of the air source heat pump unit, the calculation module 310 can be used to: calculate the pressure difference and pressure difference change rate between the high-pressure value and the low-pressure value, the temperature change rate and temperature change value of the exhaust temperature, and the total harmonic distortion rate of the compressor current; and calculate the first fault probability based on the pressure difference, the pressure difference change rate, the temperature change rate, the temperature change value, and the total harmonic distortion rate.

[0084] In some embodiments of this application, when calculating the first fault probability based on the pressure difference, the pressure difference change rate, the temperature change rate, the temperature change value, and the total harmonic distortion rate, the calculation module 310 can be used to: determine the first failure probability as the first probability when the maximum pressure difference is less than a preset first pressure difference and the pressure difference change rate is less than or equal to the preset first change rate for a consecutive preset first number of times; otherwise, the first failure probability is zero. When the temperature change rate is greater than a preset second change rate and the temperature change value is greater than a preset change value for a consecutive preset second number of times, determine the second failure probability as the second probability; otherwise, the second failure probability is zero. When the total harmonic distortion rate is greater than the preset first distortion rate and lasts for a first duration, determine the third failure probability as the third probability; otherwise, the third failure probability is zero. The first failure probability, the second failure probability, and the third failure probability are summed to obtain the first fault probability.

[0085] In some embodiments of this application, the air source heat pump unit includes a compressor and an electronic expansion valve; the preset reversing fault includes a failure to start reversing fault; when controlling the air source heat pump unit to perform a preset repair action corresponding to the preset reversing fault to repair the preset reversing fault, the control module 330 can be used to: perform a first reversing repair action to increase the operating frequency of the compressor to a first rated frequency and adjust the opening of the electronic expansion valve to the maximum opening; within a second time period after performing the first reversing repair action, if the pressure difference is not greater than or equal to a preset second pressure... If the total harmonic distortion rate (THD) is greater than a preset second distortion rate, then a second reversing repair action is performed to intermittently energize the four-way valve and raise the compressor from the first rated frequency to the second rated frequency. Within a third time period after performing the second reversing repair action, if the pressure difference is not greater than or equal to the preset second pressure difference and the THD is not greater than the preset second distortion rate, then the second reversing repair action is repeated at intervals of the third time period until the pressure difference is greater than or equal to the preset second pressure difference and the THD is greater than the preset second distortion rate, or the action is repeated a preset number of times.

[0086] In some embodiments of this application, when performing the first reversing repair action or the second reversing repair action, the control module 330 may be used to: control the air source heat pump unit to stop when the high pressure value is greater than the preset pressure; or, stop performing the first reversing repair action or the second reversing repair action when the coil temperature of the four-way valve is greater than the preset temperature.

[0087] In some embodiments of this application, the pressure domain data includes high-pressure and low-pressure values, the temperature domain data includes evaporator inlet and outlet temperatures, and the current domain data includes compressor current and compressor voltage; the preset reversing fault includes a cross-flow fault, and the fault probability includes a second fault probability of the four-way valve experiencing the cross-flow fault; when calculating the fault probability of the four-way valve experiencing a preset reversing fault based on the pressure domain data, temperature domain data, and current domain data of the air source heat pump unit, the calculation module 310 can be used to: calculate the pressure imbalance rate between the high-pressure and low-pressure values, the inlet and outlet temperature difference between the evaporator inlet and outlet temperatures, and the fundamental phase difference between the compressor current and compressor voltage; and calculate the second fault probability based on the pressure imbalance rate, the inlet and outlet temperature difference, and the fundamental phase difference.

[0088] In some embodiments of this application, when calculating the second fault probability based on the pressure imbalance rate, the inlet / outlet temperature difference, and the fundamental phase difference, the calculation module 310 can be used to: determine the first leakage probability as the fourth probability when the moving average of the pressure imbalance rate under a third consecutive preset number of times is less than the target imbalance rate; otherwise, the first leakage probability is zero. When the inlet / outlet temperature difference is less than the target temperature difference, determine the second leakage probability as the fifth probability; otherwise, the second leakage probability is zero. When the fundamental phase difference is greater than a preset phase difference and lasts for a fifth duration, determine the third leakage probability as the sixth probability; otherwise, the third leakage probability is zero. The first leakage probability, the second leakage probability, and the third leakage probability are summed to obtain the second fault probability.

[0089] In some embodiments of this application, the calculation module 310 can be used to calculate the target imbalance rate according to the formula ψ1=ψ0*[1+k1*(Tc-Tc0)], where ψ1 is the target imbalance rate, ψ0 is the preset imbalance rate, k1 is the condensation temperature compensation coefficient, Tc is the actual condensation temperature, and Tc0 is the preset reference condensation temperature.

[0090] In some embodiments of this application, the calculation module 310 can be used to: in cooling mode, adjust a preset first temperature difference to obtain the target temperature difference based on the difference between the actual ambient temperature and the preset cooling compensation temperature; and in heating mode, adjust a preset second temperature difference to obtain the target temperature difference based on the difference between the actual ambient temperature and the preset heating compensation temperature.

[0091] In some embodiments of this application, the air source heat pump unit includes a compressor, an electronic expansion valve, and a fan; the preset reversing fault includes a cross-flow fault; when controlling the air source heat pump unit to perform a preset repair action corresponding to the preset reversing fault to repair the preset reversing fault, the control module 330 can be used to: adjust the opening of the electronic expansion valve to a target opening, wherein the target opening is equal to a preset base opening plus a compensation opening corresponding to the pressure imbalance rate; adjust the operating frequency of the compressor to a target frequency every sixth time interval, wherein the target frequency is equal to a preset reference frequency multiplied by a frequency adjustment coefficient, the frequency adjustment coefficient being calculated based on the pressure imbalance rate and the target imbalance rate; adjust the fan speed to a target speed every seventh time interval, wherein the target speed is equal to a preset base speed plus an adjustment speed, the adjustment speed being calculated based on the inlet and outlet temperature difference and the speed adjustment parameters corresponding to the unit's operating mode.

[0092] It should be noted that although several modules or units for the device used to perform actions have been mentioned in the detailed description above, this division is not mandatory. In fact, according to the embodiments of this application, the features and functions of two or more modules or units described above can be embodied in one module or unit. Conversely, the features and functions of one module or unit described above can be further divided and embodied by multiple modules or units.

[0093] Furthermore, embodiments of this application also provide an electronic device, such as... Figure 4 As shown, Figure 4 A block diagram of an electronic device according to an embodiment of this application is shown, specifically: The electronic device may include components such as a processor 401 with one or more processing cores, a memory 402 with one or more computer-readable storage media, a power supply 403, and an input unit 404. Those skilled in the art will understand that... Figure 4 The electronic device structure shown does not constitute a limitation on the electronic device and may include more or fewer components than shown, or combine certain components, or have different component arrangements. Wherein: The processor 401 is the control center of the electronic device, connecting various parts of the computer device via various interfaces and lines. It executes software programs and / or modules stored in the memory 402, and calls data stored in the memory 402, to perform various functions and process data. Optionally, the processor 401 may include one or more processing cores; preferably, the processor 401 may integrate an application processor and a modem processor, wherein the application processor mainly handles the operating system, user page, and applications, and the modem processor mainly handles wireless communication. It is understood that the modem processor may not be integrated into the processor 401.

[0094] The memory 402 can be used to store software programs and modules. The processor 401 executes various functional applications and data processing by running the software programs and modules stored in the memory 402. The memory 402 may mainly include a program storage area and a data storage area. The program storage area may store the operating system, application programs required for at least one function (such as sound playback function, image playback function, etc.), etc.; the data storage area may store data created according to the use of the electronic device, etc. In addition, the memory 402 may include high-speed random access memory, and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state storage device. Accordingly, the memory 402 may also include a memory controller to provide the processor 401 with access to the memory 402.

[0095] The electronic device also includes a power supply 403 that supplies power to the various components. Preferably, the power supply 403 can be logically connected to the processor 401 through a power management system, thereby enabling functions such as charging, discharging, and power consumption management through the power management system. The power supply 403 may also include one or more DC or AC power supplies, recharging systems, power fault detection circuits, power converters or inverters, power status indicators, and other arbitrary components.

[0096] The electronic device may also include an input unit 404, which can be used to receive input digital or character information, and generate keyboard, mouse, joystick, optical or trackball signal inputs related to user settings and function control.

[0097] Although not shown, the electronic device may also include a display unit, etc., which will not be described in detail here. Specifically, in this embodiment, the processor 401 in the electronic device can load the executable files corresponding to the processes of one or more computer programs into the memory 402 according to the following instructions, and the processor 401 runs the computer programs stored in the memory 402, thereby realizing the various functions in the foregoing embodiments of this application.

[0098] For example, processor 401 can perform the following: calculate the probability of a preset reversing fault occurring in the four-way valve based on the pressure domain data, temperature domain data, and current domain data of the air source heat pump unit; determine that the four-way valve has experienced the preset reversing fault when the fault probability is greater than the preset probability; and control the air source heat pump unit to perform a preset repair action corresponding to the preset reversing fault to repair the preset reversing fault.

[0099] Those skilled in the art will understand that all or part of the steps in the various methods of the above embodiments can be performed by a computer program, or by a computer program controlling related hardware. The computer program can be stored in a computer-readable storage medium and loaded and executed by a processor.

[0100] Therefore, embodiments of this application also provide a storage medium storing a computer program that can be loaded by a processor to execute the steps in any of the methods provided in embodiments of this application.

[0101] The storage medium can be a computer-readable storage medium, which may include: read-only memory (ROM), random access memory (RAM), disk or optical disk, etc.

[0102] Since the computer program stored in the storage medium can execute the steps of any of the methods provided in the embodiments of this application, the beneficial effects that the methods provided in the embodiments of this application can achieve can be realized. For details, please refer to the previous embodiments, which will not be repeated here.

[0103] According to another embodiment of this application, a computer program product or computer program includes computer instructions stored in a computer-readable storage medium. A processor of an electronic device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the electronic device to perform the methods provided in the various optional implementations described in the embodiments of this application.

[0104] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the embodiments disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein.

[0105] It should be understood that this application is not limited to the embodiments described above and shown in the accompanying drawings, but various modifications and changes can be made without departing from its scope.

Claims

1. An air source heat pump unit control method characterized by, The air source heat pump unit comprises a four-way valve, and the method comprises the following steps: According to the pressure domain data, temperature domain data and current domain data of the air source heat pump unit, the fault probability of the four-way valve occurring a preset reversing fault is calculated; When the fault probability is greater than a preset probability, it is determined that the four-way valve has occurred the preset reversing fault; The air source heat pump unit is controlled to perform a preset repair action corresponding to the preset reversing fault to repair the preset reversing fault.

2. The method of claim 1, wherein, The pressure domain data comprises high pressure and low pressure, the temperature domain data comprises exhaust temperature, and the current domain data comprises compressor current; the preset reversing fault comprises a failure to start reversing fault, and the fault probability comprises a first fault probability of the four-way valve occurring the failure to start reversing fault; The calculation according to the pressure domain data, temperature domain data and current domain data of the air source heat pump unit to obtain the fault probability of the four-way valve occurring a preset reversing fault comprises the following steps: The differential pressure and differential pressure change rate between the high pressure and the low pressure, the temperature change rate and temperature change value of the exhaust temperature, and the total harmonic distortion rate of the compressor current are calculated; The first fault probability is calculated according to the differential pressure, the differential pressure change rate, the temperature change rate, the temperature change value and the total harmonic distortion rate.

3. The method of claim 2, wherein, The calculation according to the differential pressure, the differential pressure change rate, the temperature change rate, the temperature change value and the total harmonic distortion rate to obtain the first fault probability comprises the following steps: When the maximum differential pressure is less than a preset first differential pressure and the differential pressure change rate of the continuous preset first number of times is less than or equal to a preset first change rate, it is determined that the first failure to start probability is a first probability, otherwise, the first failure to start probability is zero; When the temperature change rate of the continuous preset second number of times is greater than a preset second change rate and the temperature change value is greater than a preset change value, it is determined that the second failure to start probability is a second probability, otherwise, the second failure to start probability is zero; When the total harmonic distortion rate is greater than a preset first distortion rate and lasts for a first time length, it is determined that the third failure to start probability is a third probability, otherwise, the third failure to start probability is zero; The first failure to start probability, the second failure to start probability and the third failure to start probability are summed to obtain the first fault probability.

4. The method of claim 2, wherein, The air source heat pump unit comprises a compressor and an electronic expansion valve; the preset reversing fault comprises a failure to start reversing fault; The control of the air source heat pump unit to perform a preset repair action corresponding to the preset reversing fault to repair the preset reversing fault comprises the following steps: A first reversing repair action is performed to increase the operating frequency of the compressor to a first rated frequency and adjust the opening degree of the electronic expansion valve to a maximum opening degree; In a second time period after the first commutation repair action is performed, if the pressure difference is greater than or equal to a preset second pressure difference and the total harmonic distortion rate is greater than a preset second distortion rate, a second commutation repair action is performed to intermittently energize the four-way valve and raise the compressor from the first rated frequency to a second rated frequency. In a third time period after the second commutation repair action is performed, if the pressure difference is greater than or equal to the preset second pressure difference and the total harmonic distortion rate is greater than the preset second distortion rate, the second commutation repair action is repeatedly performed at intervals of the third time period until the pressure difference is greater than or equal to the preset second pressure difference and the total harmonic distortion rate is greater than the preset second distortion rate or the preset number of repetitions is reached.

5. The method of claim 4, wherein, The method further comprises the following when the first commutation repair action or the second commutation repair action is performed: When the high-pressure pressure value is greater than a preset pressure, the air source heat pump unit is stopped; Or, when the coil temperature of the four-way valve is greater than a preset temperature, the first commutation repair action or the second commutation repair action is stopped.

6. The method of claim 1, wherein, The pressure domain data includes a high-pressure pressure value and a low-pressure pressure value, the temperature domain data includes an evaporator inlet temperature and an evaporator outlet temperature, and the current domain data includes a compressor current and a compressor voltage. The preset commutation fault includes a gas leakage fault, and the fault probability includes a second fault probability of the four-way valve having the gas leakage fault. The calculation according to the pressure domain data, the temperature domain data, and the current domain data of the air source heat pump unit to obtain the fault probability of the four-way valve having the preset commutation fault includes: Calculating a pressure imbalance rate of the high-pressure pressure value and the low-pressure pressure value, an inlet-outlet temperature difference between the evaporator inlet temperature and the evaporator outlet temperature, and a fundamental wave phase difference between the compressor current and the compressor voltage. The calculation according to the pressure imbalance rate, the inlet-outlet temperature difference, and the fundamental wave phase difference to obtain the second fault probability.

7. The method of claim 6, wherein, The calculation according to the pressure imbalance rate, the inlet-outlet temperature difference, and the fundamental wave phase difference to obtain the second fault probability includes: When the moving average of the pressure imbalance rate in a preset third number of consecutive times is less than a target imbalance rate, a first gas leakage probability is determined as a fourth probability, otherwise, the first gas leakage probability is zero; When the inlet-outlet temperature difference is less than a target temperature difference, a second gas leakage probability is determined as a fifth probability, otherwise, the second gas leakage probability is zero; When the fundamental wave phase difference is greater than a preset phase difference and lasts for a fifth time period, a third gas leakage probability is determined as a sixth probability, otherwise, the third gas leakage probability is zero; The first gas leakage probability, the second gas leakage probability, and the third gas leakage probability are summed to obtain the second fault probability.

8. The method of claim 7, wherein, The target imbalance rate includes: The target imbalance rate is calculated according to the formula ψ1=ψ0*[1+k1*(Tc-Tc0)], where ψ1 is the target imbalance rate, ψ0 is a preset imbalance rate, k1 is a condensation temperature compensation coefficient, Tc is an actual condensation temperature, and Tc0 is a preset reference condensation temperature.

9. The method of claim 7, wherein, The target temperature difference comprises: In the cooling mode, the preset first temperature difference is adjusted according to the difference between the actual environment temperature and the preset cooling compensation temperature to obtain the target temperature difference; In the heating mode, the preset second temperature difference is adjusted according to the difference between the actual environment temperature and the preset heating compensation temperature to obtain the target temperature difference.

10. The method of claim 6, wherein, The air source heat pump unit comprises a compressor, an electronic expansion valve and a fan; the preset reversing fault comprises a gas leakage fault; The control of the air source heat pump unit to perform the preset repair action corresponding to the preset reversing fault to repair the preset reversing fault comprises: The opening of the electronic expansion valve is adjusted to a target opening, wherein the target opening is equal to a preset basic opening plus a compensation opening corresponding to the pressure imbalance rate; The running frequency of the compressor is adjusted to a target frequency every sixth time length, wherein the target frequency is equal to a preset reference frequency multiplied by a frequency adjustment coefficient, and the frequency adjustment coefficient is calculated according to the pressure imbalance rate and a target imbalance rate; The speed of the fan is adjusted to a target speed every seventh time length, wherein the target speed is equal to a preset basic speed plus an adjustment speed, and the adjustment speed is calculated according to the inlet and outlet temperature difference and a speed adjustment parameter corresponding to the unit running mode.

11. An air source heat pump unit control apparatus, characterized by, The air source heat pump unit comprises a four-way valve, and the device comprises: A calculation module for calculating the pressure domain data, temperature domain data and current domain data of the air source heat pump unit to obtain the fault probability of the four-way valve occurring the preset reversing fault; A determination module for determining that the four-way valve occurs the preset reversing fault when the fault probability is greater than a preset probability; A control module for controlling the air source heat pump unit to perform the preset repair action corresponding to the preset reversing fault to repair the preset reversing fault.

12. A storage medium, characterized by The computer program is stored thereon, and when the computer program is executed by the processor of the electronic device, the electronic device executes the method of any one of claims 1-10.

13. An electronic device, comprising: Comprise: A memory storing a computer program; A processor reading the computer program stored in the memory to execute the method of any one of claims 1-10.

Images