Heat pump unit control method and device, electronic equipment and readable storage medium

Abstract

The invention provides a heat pump unit control method and device, electronic equipment and a readable storage medium, and the method comprises the following steps: if high-load protection is triggered, obtaining water outlet temperature data of a heat pump unit in a protection period of the high-load protection; determining an outlet water temperature change state according to the outlet water temperature data; a protection triggering object is determined according to the outlet water temperature change state; and executing a protection releasing strategy based on the protection triggering object. When the high-load protection is triggered, the water outlet temperature data in the protection period is detected, so that the water flow state in the water circulation system can be determined through the water outlet temperature data, whether the high-load protection is caused by the water circulation system or not is determined, and a trigger object can be clearly protected; and the protection contact strategy is executed based on the protection triggering object, so that the heat pump unit can automatically recover to a normal operation state, and user use is prevented from being influenced.

Description

Technical Field

[0001] This invention relates to the field of heat pump units, and more particularly to a heat pump unit control method, apparatus, electronic device, and readable storage medium. Background Technology

[0002] Air source heat pump units have gained increasing recognition from users due to their advantages such as energy saving, ease of use, and zero pollution, combined with the national coal-to-electricity conversion policy.

[0003] During the operation of a heat pump unit, if there is air trapped in the water circulation system or the water pump stops abnormally, the heat pump unit will trigger high-load protection such as high-pressure protection, power protection, or current protection, causing the heat pump unit to shut down.

[0004] Besides issues caused by the water circulation system, malfunctions in the heat pump unit itself can also lead to protective shutdowns. However, current technology cannot differentiate the causes of these shutdowns, making it impossible to specifically disable them. Users can only wait for after-sales personnel to troubleshoot, resulting in a poor user experience. Summary of the Invention

[0005] The main objective of this invention is to provide a heat pump unit control method, device, electronic equipment, and readable storage medium, aiming to solve the problem in the prior art that the cause of protection shutdown cannot be distinguished.

[0006] To achieve the above objectives, the present invention provides a heat pump unit control method, the method comprising the following steps: If high load protection is triggered, the outlet water temperature data of the heat pump unit during the protection cycle of the high load protection is obtained. Determine the water temperature change status based on the water temperature data; The protection trigger target is determined based on the change in the outlet water temperature. The protection release strategy is executed based on the protection trigger object.

[0007] Optionally, determining the protection trigger object based on the change in the outlet water temperature includes: Determine whether the outlet water temperature rises within the first preset time after the heat pump unit stops following the triggering of high-pressure load protection; If the outlet water temperature rises within the first preset time after the heat pump unit stops, the protection trigger target is determined to be the water circulation system of the heat pump unit.

[0008] Optionally, the step of determining the protection trigger object as the water circulation system of the heat pump unit if the outlet water temperature rises within a first preset time after the heat pump unit stops includes: If the outlet water temperature rises within the first preset time after the heat pump unit stops, the high pressure, compressor frequency and inlet water temperature of the heat pump unit during the protection cycle of the high load protection are obtained. Obtain the frequency range of the compressor frequency and the inlet water temperature range within a second preset time period before the high load protection is triggered; Determine whether the frequency range is less than a first threshold, the inlet water range is less than a second threshold, and the high pressure rises to a protection threshold. If the frequency range is less than the first threshold, the inlet water range is less than the second threshold, and the high pressure rises to the protection threshold, then the protection trigger object is determined to be the water circulation system of the heat pump unit.

[0009] Optionally, the protection triggering object is a water circulation system; the execution of the protection release strategy based on the protection triggering object includes: Obtain the water pump voltage data of the water circulation system; Based on the water pump voltage data, the triggering cause was determined to be either an air blockage in the water circulation system or an abnormal water pump voltage. The protection release strategy is executed based on the triggering reason.

[0010] Optionally, determining the triggering cause as an air blockage or abnormal water pump voltage within the water circulation system based on the water pump voltage data includes: Determine whether the water pump voltage is stable before triggering the high load protection based on the water pump voltage data. If the water pump voltage stabilizes before triggering the high load protection, the triggering cause is determined to be an air blockage within the water circulation system. If the water pump voltage is unstable before the high load protection is triggered, the triggering cause is determined to be an abnormal water pump voltage.

[0011] Optionally, determining whether the water pump voltage is stable before triggering high-load protection based on the water pump voltage data includes: The maximum and minimum stable voltages of the heat pump unit after startup are determined from the water pump voltage data. The stable voltage range is obtained by using the maximum stable voltage and the minimum stable voltage; Determine whether the water pump voltage is within the stable voltage range within a third preset time period before triggering the high load protection; If the water pump voltage is within the stable voltage range within a third preset time period before triggering the high load protection, then the water pump voltage is determined to be stable before triggering the high load protection.

[0012] Optionally, the triggering reason is an abnormal water pump voltage, and the execution of the protection release strategy based on the triggering reason includes: The stable voltage range is obtained based on the water pump voltage data; The target start-up voltage range and the target shutdown voltage range are determined based on the stable voltage range, wherein the stable voltage range is truly contained within the target start-up voltage range, and the target shutdown voltage range is truly contained within the target start-up voltage range; When the water pump voltage is within the target starting voltage range, the water pump voltage regulating device is activated; When the water pump voltage is within the target shut-off voltage range, the water pump voltage regulating device is turned off.

[0013] To achieve the above objectives, the present invention also provides a heat pump unit control device, the heat pump unit control device comprising: The first acquisition module is used to acquire the outlet water temperature data of the heat pump unit during the protection cycle of the high load protection if the high load protection is triggered. The first determining module is used to determine the water temperature change state based on the water temperature data. The second determining module is used to determine the protection trigger object based on the change in the outlet water temperature. The first execution module is used to execute a protection release strategy based on the protection trigger object.

[0014] Optionally, the second determining module includes; The first judgment unit is used to determine whether the outlet water temperature rises within the first preset time after the heat pump unit stops after the high-pressure load protection is triggered. The first determining unit is used to determine that if the outlet water temperature rises within a first preset time after the heat pump unit stops, the protection trigger object is the water circulation system of the heat pump unit.

[0015] Optionally, the first determining unit includes: The first acquisition subunit is used to acquire the high pressure, compressor frequency and inlet water temperature of the heat pump unit during the protection cycle of the high load protection if the outlet water temperature rises within a first preset time after the heat pump unit stops. The second acquisition subunit is used to acquire the frequency range of the compressor frequency and the inlet water temperature range within a second preset time before the high load protection is triggered. The first judgment subunit is used to determine whether the frequency range is less than a first threshold, the water inlet range is less than a second threshold, and the high pressure rises to a protection threshold. The first determining subunit is used to determine that the protection trigger object is the water circulation system of the heat pump unit if the frequency range is less than a first threshold, the inlet water range is less than a second threshold, and the high pressure rises to a protection threshold.

[0016] Optionally, the protection trigger object is a water circulation system; the first execution module includes: The first acquisition unit is used to acquire the water pump voltage data of the water circulation system; The second determining unit is used to determine, based on the water pump voltage data, whether the triggering cause is an air blockage or an abnormal water pump voltage in the water circulation system. The first execution unit is used to execute the protection release strategy based on the triggering reason.

[0017] Optionally, the second determining unit includes: The second judgment subunit is used to determine whether the water pump voltage is stable before the high load protection is triggered based on the water pump voltage data. The second determining subunit is used to determine that if the water pump voltage is stable before triggering the high load protection, the triggering cause is an air blockage in the water circulation system. The third determining subunit is used to determine that the triggering cause is abnormal water pump voltage if the water pump voltage is unstable before triggering high load protection.

[0018] Optionally, the second determination subunit includes: The first determining unit is used to determine the maximum stable voltage and the minimum stable voltage of the heat pump unit after it is started from the water pump voltage data. A first execution unit is used to obtain a stable voltage range using the maximum stable voltage and the minimum stable voltage; The first judgment unit is used to determine whether the water pump voltage is within the stable voltage range within a third preset time before the high load protection is triggered. The first determining unit is configured to determine that the water pump voltage is stable before triggering the high load protection if the water pump voltage is within the stable voltage range for a third preset time period before triggering the high load protection.

[0019] Optionally, the triggering reason is an abnormal water pump voltage, and the first execution module includes: The second execution unit is used to obtain a stable voltage range based on the water pump voltage data; The third determining unit is used to determine a target start-up voltage range and a target shutdown voltage range based on the stable voltage range, wherein the stable voltage range is truly included in the target start-up voltage range, and the target shutdown voltage range is truly included in the target start-up voltage range; The first starting unit is used to start the water pump voltage regulating device when the water pump voltage is within the target starting voltage range; The first shut-off unit is used to shut off the water pump voltage regulating device when the water pump voltage is within the target shut-off voltage range.

[0020] To achieve the above objectives, the present invention also provides an electronic device, the electronic device including a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the computer program, when executed by the processor, implements the steps of the heat pump unit control method as described above.

[0021] To achieve the above objectives, the present invention also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps of the heat pump unit control method described above.

[0022] This invention proposes a heat pump unit control method, device, electronic equipment, and readable storage medium. If high-load protection is triggered, the method acquires the outlet water temperature data of the heat pump unit during the protection cycle of the high-load protection; determines the outlet water temperature change state based on the outlet water temperature data; determines the protection trigger object based on the outlet water temperature change state; and executes a protection release strategy based on the protection trigger object. By detecting the outlet water temperature data during the protection cycle when high-load protection is triggered, the water flow state within the water circulation system can be determined through the outlet water temperature data, thereby determining whether the high-load protection is caused by the water circulation system. This allows for the identification of the protection trigger object, and the execution of a protection release strategy based on the protection trigger object, enabling the heat pump unit to automatically return to normal operation and avoiding disruption to user experience. Attached Figure Description

[0023] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a flowchart illustrating the first embodiment of the heat pump unit control method of the present invention; Figure 2 This is an overall flowchart of the heat pump unit control method of the present invention; Figure 3 This is a schematic diagram of the module structure of the electronic device of the present invention. Detailed Implementation

[0026] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this application.

[0027] This invention provides a control method for a heat pump unit, referring to... Figure 1 , Figure 1 This is a flowchart illustrating the first embodiment of the heat pump unit control method of the present invention. The method includes the following steps: Step S10: If high load protection is triggered, obtain the outlet water temperature data of the heat pump unit during the protection cycle of the high load protection. High load protection is a shutdown protection mechanism triggered when critical operating parameters of the heat pump unit exceed safety thresholds due to excessive compressor load during operation. Critical operating parameters include discharge pressure, compressor current, and compressor power. For example, high load protection is triggered when the discharge pressure exceeds the pressure threshold, the compressor current exceeds the current threshold, or the compressor power exceeds the power threshold.

[0028] The protection period is a period of time before and after the high load protection is triggered; the relative relationship between the protection period and the time when the high load protection is triggered can be set according to actual needs; for example, the protection period is set to the time period between 3 minutes before the high load protection is triggered and 3 minutes after the high load protection is triggered.

[0029] For ease of explanation, the structure of the heat pump unit will be described first. It should be noted that this is only an example, and in actual applications, a suitable heat pump unit can be selected based on actual needs.

[0030] A heat pump unit includes a refrigerant system, a water circulation system, and a water-side heat exchanger; the specific type of water-side heat exchanger can be set according to actual needs, such as a plate heat exchanger, a coaxial heat exchanger, or a shell-and-tube heat exchanger.

[0031] The refrigerant system includes a compressor, exhaust temperature sensor, high-pressure sensor, four-way valve, finned heat exchanger, ambient temperature sensor, electronic expansion valve, liquid line temperature sensor, gas line temperature sensor, gas separator, intake temperature sensor, and low-pressure sensor. The compressor's discharge end is connected to the first end of a four-way valve, the second end of the four-way valve is connected to the first end of a finned heat exchanger, the second end of the finned heat exchanger is connected to the first end of the first side of a water-side heat exchanger via an electronic expansion valve, the second end of the first side of the water-side heat exchanger is connected to the third end of the four-way valve, the fourth end of the four-way valve is connected to the input end of a gas separator, and the output end of the gas separator is connected to the compressor's inlet end. An exhaust temperature sensor is located at the compressor's discharge end; a high-pressure sensor is located between the compressor's discharge end and the first end of the four-way valve; an ambient temperature sensor is located at the outlet of the finned heat exchanger; a liquid pipe temperature sensor is located at the first end of the first side of the water-side heat exchanger; a gas pipe temperature sensor is located at the second end of the first side of the water-side heat exchanger; and an intake temperature sensor and a low-pressure sensor are located at the compressor's inlet. The water circulation system includes an outlet temperature sensor, an expansion device, a water pump, and an inlet temperature sensor. The water pump's outlet is connected to the inlet of the second side of the water-side heat exchanger, and the water pump's inlet is connected to the expansion device. The water pump's inlet and the outlet of the second side of the water-side heat exchanger are connected to the indoor terminal to form a circulation system. An outlet temperature sensor is installed at the outlet of the second side of the water-side heat exchanger, and an inlet temperature sensor is installed at the inlet of the second side of the water-side heat exchanger. The specific type of indoor terminal can be configured based on actual needs, such as underfloor heating, radiators, or fan coil units.

[0032] The aforementioned temperature sensor is used to detect the temperature of the refrigerant or water at the location.

[0033] In cooling mode, the first and second ends of the four-way valve are connected, and the third and fourth ends are connected. The high-temperature and high-pressure refrigerant discharged from the compressor reaches the finned heat exchanger and releases heat. Then it reaches the water-side heat exchanger and exchanges heat with the water circulation system before returning to the compressor's intake end. The water in the water circulation system decreases in temperature after passing through the water-side heat exchanger, thus achieving cooling. In heating mode, the first and third ends of the four-way valve are connected, and the second and fourth ends are connected; the high-temperature and high-pressure refrigerant discharged from the compressor reaches the water circulation system for heat exchange, and then returns to the compressor intake end after absorbing heat through the finned heat exchanger; the water in the water circulation system is heated after passing through the water-side heat exchanger, thus achieving heating.

[0034] The outlet water temperature data is the data obtained by collecting temperature data at the outlet end of the second side of the water-side heat exchanger.

[0035] Step S20: Determine the water temperature change status based on the water temperature data; The outlet water temperature change status is used to indicate the changes in outlet water temperature.

[0036] It is understandable that the state of the water in the water circulation system will affect the outlet water temperature. For example, after the high-load protection shutdown is triggered, if there is water in the water circulation system, the water will flow through the water-side heat exchanger. Due to the shutdown, heat exchange with the refrigerant system is not possible, so the outlet water temperature will gradually decrease to the inlet water temperature. If there is no water flow in the water circulation system, the outlet water temperature will not decrease due to water circulation. Instead, since the compressor exhaust pipe is directly connected to the upper part of the water-side heat exchanger after passing through the four-way valve, and is very close to the outlet water position also located at the upper part of the water-side heat exchanger, and the compressor exhaust pipe has a higher temperature, this temperature will be conducted to the stagnant outlet water pipe, causing the outlet water temperature to rise. Therefore, by detecting the change in outlet water temperature, it is possible to determine whether the high-load protection is caused by a lack of water in the water circulation system.

[0037] Step S30: Determine the protection trigger object based on the change in the outlet water temperature; The protection trigger object is the object that triggers high load protection.

[0038] If the water circulation system is found to be short of water based on the change in outlet water temperature, then the protection trigger target is considered to be the water circulation system.

[0039] If the presence of water in the water circulation system is determined based on the change in outlet water temperature, then the protection trigger is considered to be applied to the refrigerant system.

[0040] Step S40: Execute the protection release strategy based on the protection trigger object.

[0041] Once the protection trigger object is identified, the high-load protection can be released for that object.

[0042] For example, when the protection triggers the water circulation system, it can remind the user to add water and vent the system; when the protection triggers the refrigerant system, it can remind the user to contact after-sales service to have the heat pump unit inspected.

[0043] This embodiment detects the outlet water temperature data within the protection cycle when high load protection is triggered. By using the outlet water temperature data, the water flow status within the water circulation system can be determined, thereby determining whether the high load protection is caused by the water circulation system. This allows for the identification of the protection trigger object, and then the protection contact strategy can be executed based on the protection trigger object, enabling the heat pump unit to automatically return to normal operation and avoid affecting user use.

[0044] Furthermore, in the second embodiment of the heat pump unit control method of the present invention based on the first embodiment, step S30 includes the following steps: Step S31: Determine whether the outlet water temperature rises within the first preset time after the heat pump unit stops following the triggering of high-pressure load protection. Step S32: If the outlet water temperature rises within the first preset time after the heat pump unit stops, the protection trigger object is determined to be the water circulation system of the heat pump unit.

[0045] When the high-pressure load protection is triggered, the heat pump unit shuts down. At this time, the compressor stops running, and the refrigerant system no longer supplies heat to the water circulation system. However, the water pump in the water circulation system shuts down with a delay. When there is water in the water circulation system, since it cannot obtain heat from the refrigerant system, the water enters the water-side heat exchanger without heat exchange and is output immediately. Therefore, the outlet water temperature will gradually change to the same as the inlet water temperature. Before the high-pressure load protection is triggered, the water obtains heat from the refrigerant system in the water-side heat exchanger, and the outlet water temperature is higher at this time. Therefore, if the outlet water temperature gradually changes to the same as the inlet water temperature within the first preset time after the high-pressure load protection is triggered, the outlet water temperature itself will show a temperature drop. Therefore, if the outlet water temperature drops within the first preset time after the heat pump unit stops, it is determined that the water flow in the water circulation system is normal. Therefore, the protection trigger target is the refrigerant system of the heat pump unit.

[0046] When there is no water flow in the water circulation system, the outlet water temperature will not decrease due to water circulation. Instead, since the compressor exhaust pipe is directly connected to the upper part of the water-side heat exchanger after passing through the four-way valve, and is very close to the outlet water position also located at the upper part of the water-side heat exchanger, and the compressor exhaust pipe has a high temperature, it will be conducted to the stagnant outlet water pipe, causing the outlet water temperature to rise. Therefore, if the outlet water temperature rises within the first preset time after the high load protection is triggered, it is determined that there is a water shortage in the water circulation system. Therefore, the protection trigger target is the water circulation system.

[0047] The specific value of the first preset time can be set based on actual needs.

[0048] In this embodiment, the protection trigger object can be accurately determined as the water circulation system or the refrigerant system based on the change in outlet water temperature.

[0049] Further, step S32 includes the following steps: Step S321: If the outlet water temperature rises within the first preset time after the heat pump unit stops, then obtain the high pressure, compressor frequency and inlet water temperature of the heat pump unit during the protection cycle of the high load protection. Step S322: Obtain the frequency range of the compressor frequency and the inlet water temperature range within a second preset time period before the high load protection is triggered; Step S323: Determine whether the frequency range is less than the first threshold, the inlet water range is less than the second threshold, and the high pressure rises to the protection threshold. Step S324: If the frequency range is less than the first threshold, the inlet water range is less than the second threshold, and the high pressure rises to the protection threshold, then the protection trigger object is determined to be the water circulation system of the heat pump unit.

[0050] The high pressure is the pressure at the compressor's discharge port.

[0051] The compressor frequency is the operating frequency of the compressor.

[0052] The inlet water temperature is the temperature at the inlet end of the second side of the water-side heat exchanger in the water circulation system.

[0053] The compressor frequency directly determines the compressor's heating capacity.

[0054] The frequency range is the difference between the maximum and minimum values ​​of the compressor frequency within the second preset time period.

[0055] The inlet water range is the difference between the maximum and minimum inlet water temperature within the second preset time period.

[0056] When the frequency range is small, the compressor frequency is considered to be relatively stable within the second preset time period. Specifically, when the frequency range is less than the first threshold, the compressor frequency is considered to be relatively stable within the second preset time period. The specific value of the first threshold can be set based on actual needs.

[0057] When the inlet water temperature difference is small, the inlet water temperature is considered to be relatively stable within the second preset time period. Specifically, when the inlet water temperature difference is less than the second threshold, the inlet water temperature is considered to be relatively stable within the second preset time period. The specific value of the second threshold can be set based on actual needs.

[0058] The protection threshold is the maximum allowable high pressure of the heat pump unit.

[0059] If the high pressure suddenly rises above the protection threshold when the compressor frequency and the water inlet frequency are relatively stable, it indicates that the heat exchange between the refrigerant system and the water circulation system is abnormal. Heat cannot be transferred normally from the refrigerant system to the water circulation system, which leads to the rise in high pressure. At the same time, combined with the fact that the outlet water temperature rises within the first preset time after the heat pump unit stops, it can be determined that the high load protection is caused by the lack of water flow in the water circulation system.

[0060] If the frequency range is greater than or equal to the first threshold, the inlet water range is greater than or equal to the second threshold, or the high pressure does not rise to the protection threshold, then it is determined that the protection trigger object is not the water circulation system of the heat pump unit.

[0061] In this embodiment, by combining the inlet water temperature, compressor frequency, and high pressure in the second time period, it is further determined whether the protection trigger object is the water circulation system, thereby further improving the accuracy of the protection trigger object determination.

[0062] Furthermore, in the third embodiment of the heat pump unit control method of the present invention based on the first embodiment, the protection trigger object is the water circulation system; step S40 includes the following steps: Step S41: Obtain the water pump voltage data of the water circulation system; Step S42: Based on the water pump voltage data, determine that the triggering cause is an air blockage or abnormal water pump voltage in the water circulation system. Step S43: Execute the protection release strategy based on the triggering reason.

[0063] The water pump voltage data is obtained by detecting the voltage at the water pump terminals.

[0064] Understandably, the water pump is driven by the water pump voltage to control its operation.

[0065] The triggering cause is a specific event within the water circulation system that triggers high-load protection.

[0066] When a large amount of air accumulates in a water circulation system, it will cause no water flow in the system. It is understandable that when there is no water in the water circulation system, such as when it is full of air, it is also an air blockage event.

[0067] When the water pump in the water circulation system stops due to abnormal voltage, although there is water in the water circulation system, the water is stagnant because the pump cannot push the water. At this time, the heat in the refrigerant system cannot be transferred to the water circulation system, thus triggering the high load protection.

[0068] Therefore, when the water circulation system is a protected trigger, the water pump voltage data is detected to determine whether there is an abnormal water pump voltage. If the pump voltage data indicates an abnormality in the pump voltage, then the abnormal pump voltage is determined to be the triggering cause. If the pump voltage data indicates that there is no abnormal pump voltage, then the cause is determined to be an air blockage within the water circulation system.

[0069] Once the triggering cause is determined, the protection release strategy can be executed according to the type of triggering cause. For example, if the triggering cause is abnormal water pump voltage, the protection release strategy is to control the water pump voltage to return to normal. If the triggering cause is air blockage in the water circulation system, the user is reminded to replenish water and vent air.

[0070] In this embodiment, by analyzing the water pump voltage data, the triggering cause of the high-load protection can be further determined, thereby identifying a more specific problematic device and enabling targeted protection release strategies to be implemented.

[0071] Further, step S42 includes the following steps: Step S421: Determine whether the water pump voltage is stable before triggering the high load protection based on the water pump voltage data; Step S422: If the water pump voltage is stable before the high load protection is triggered, the triggering cause is determined to be an air blockage in the water circulation system. Step S423: If the water pump voltage is unstable before the high load protection is triggered, the triggering cause is determined to be abnormal water pump voltage.

[0072] If the water pump voltage is stable before the high load protection is triggered, it means that the water pump voltage is normal when the high load protection is triggered. Therefore, the water flow problem is not caused by an abnormal water pump voltage. Thus, it is determined that the high load protection was triggered due to an air blockage in the water circulation system.

[0073] If the water pump voltage is unstable before the high load protection is triggered, it indicates that the water pump voltage is abnormal when the high load protection is triggered. Therefore, it is believed that the water flow problem is caused by the abnormal water pump voltage. Thus, it is determined that the high load protection was triggered due to the abnormal water pump voltage.

[0074] This embodiment accurately determines the triggering cause as either abnormal water pump voltage or air blockage within the water circulation system, based on the stability of the water pump voltage before triggering the high load protection.

[0075] Further, step S421 includes the following steps: Step S4211: Determine the maximum stable voltage and minimum stable voltage of the heat pump unit after startup from the water pump voltage data; Step S4212: Obtain the stable voltage range using the maximum stable voltage and the minimum stable voltage; Step S4213: Determine whether the water pump voltage is within the stable voltage range within the third preset time before triggering the high load protection; Step S4214: If the water pump voltage is within the stable voltage range within a third preset time before triggering the high load protection, then it is determined that the water pump voltage is stable before triggering the high load protection.

[0076] The maximum stable voltage is the maximum stable input voltage of the water pump detected after the heat pump unit is turned on; The minimum stable voltage is the minimum voltage at which the water pump voltage is stably input after the heat pump unit is turned on.

[0077] It should be noted that the maximum and minimum stable voltages in this embodiment are the voltages that are stably provided. In actual applications, instantaneous excessive or insufficient voltages caused by interference or other reasons are not considered as the maximum or minimum stable voltages.

[0078] For example, after the heat pump unit is turned on, the water pump voltage is automatically detected and recorded; when the heat pump unit is running normally, if it is detected that the water pump voltage is maintained at a certain voltage for a preset detection time, and this voltage is greater than the previously recorded maximum stable voltage, then the maximum stable voltage is updated to this voltage; the specific value of the preset detection time can be set according to actual needs; When the heat pump unit is operating normally, if it is detected that the water pump voltage is maintained at a certain voltage for a preset detection time, and this voltage is lower than the previously recorded minimum stable voltage, then the minimum stable voltage will be updated to this voltage.

[0079] The interval between the maximum stable voltage and the minimum stable voltage is defined as the stable voltage interval.

[0080] It is understandable that, since the maximum stable voltage and the minimum stable voltage are the voltages that are stably supplied to the water pump when the heat pump unit is running normally, the voltage can drive the water pump normally within the stable voltage range formed by the maximum stable voltage and the minimum stable voltage. Therefore, if the water pump voltage is within the stable voltage range within the third preset time before the high load protection is triggered, it is determined that the water pump voltage is stable before the high load protection is triggered. If the pump voltage is not within a stable voltage range within the third preset time before the high load protection is triggered, then the pump voltage is determined to be unstable before the high load protection is triggered.

[0081] In this embodiment, by determining whether the water pump voltage is within a stable voltage range, it is possible to accurately determine whether the water pump voltage is stable before triggering the high load protection.

[0082] Furthermore, in the fourth embodiment of the heat pump unit control method of the present invention based on the first embodiment, the triggering reason is abnormal water pump voltage, and step S40 includes the following steps: Step S41: Obtain the stable voltage range based on the water pump voltage data; Step S42: Determine the target start-up voltage range and the target shutdown voltage range based on the stable voltage range, wherein the stable voltage range is truly contained within the target start-up voltage range, and the target shutdown voltage range is truly contained within the target start-up voltage range; Step S43: When the water pump voltage is within the target starting voltage range, start the water pump voltage regulating device; Step S44: When the water pump voltage is within the target shut-off voltage range, shut down the water pump voltage regulating device.

[0083] When the triggering cause is abnormal water pump voltage, the water pump voltage needs to be adjusted to the normal range. In this embodiment, the water pump voltage is adjusted by a water pump voltage adjustment device.

[0084] The water pump voltage regulator is an electrical control module used to stabilize or adjust the power supply voltage to the water pump; the water pump voltage regulator can automatically adjust the water pump voltage to the required voltage.

[0085] In practical applications, the pump voltage regulator is usually controlled based on the pump's rated voltage. For example, when the pump voltage is within the rated range, the pump voltage regulator is turned off, and when the pump voltage exceeds the rated range, the pump voltage regulator is turned on to readjust the pump voltage back to the rated range.

[0086] However, when an abnormal water pump voltage triggers the high-load protection, it indicates that the start-stop strategy of the water pump voltage regulator is insufficient to meet the water pump voltage regulation requirements. Therefore, in this embodiment, the start-up voltage range of the water pump voltage regulator is narrowed, specifically to a range smaller than the stable voltage range. This allows the water pump voltage regulator to be activated when the water pump voltage is about to exceed the stable voltage range, thus preventing the water pump voltage from exceeding the stable voltage range. The water pump voltage regulator is only shut down when it has adjusted the water pump voltage to a more satisfactory range, i.e., the target shutdown voltage range. This ensures that the water pump voltage is satisfied to a greater extent before shutting down the water pump voltage regulator.

[0087] The specific relationship between the target start-up voltage range, the target stop-up voltage range, and the stable voltage range can be set based on actual needs. For example, the target start-up voltage range can be set to [minimum stable voltage + 2, maximum stable voltage - 2]; the target stop-up voltage range can be set to [minimum stable voltage + 5, maximum stable voltage - 5].

[0088] Simultaneously, it can record and analyze the changes in water pump voltage at different times of the day after the water pump voltage abnormality triggers the high load protection. If the water pump voltage changes irregularly, the voltage regulation device can be started and stopped according to the above method.

[0089] If the water pump voltage has a certain regularity, such as exceeding the stable voltage range only during certain fixed time periods each day, then the voltage regulator should be turned on n minutes before these fixed time periods and turned off n minutes after these fixed time periods.

[0090] When the triggering cause is air blockage in the water circulation system, the protection release strategy can be to wait for the air to float above the pipe after an interval, without interrupting the water flow, and then control the heat pump unit and water pump to restart according to the start-up procedure. At the same time, since there is still air in the water circulation system at this time, the possibility of air blockage still exists. Therefore, it is necessary to detect the air blockage.

[0091] First, obtain the correspondence between ambient temperature, compressor frequency, inlet water temperature, outlet water temperature, and high-pressure under normal operating conditions, and determine the normal outlet water temperature and normal high-pressure corresponding to different ambient temperatures, compressor frequencies, and inlet water temperatures under normal operating conditions. After triggering the high-load protection, control the heat pump unit to restart, and then detect the outlet water temperature and high-pressure. When the detected outlet water temperature minus the normal outlet water temperature is greater than the outlet water temperature threshold, or the high-pressure pressure minus the normal high-pressure pressure is greater than the high-pressure pressure threshold, it is considered that an air blockage has occurred, and the corresponding protection release strategy is executed again. The specific values ​​of the outlet water temperature threshold and the high-pressure pressure threshold can be set based on actual needs.

[0092] After the user replenishes water and vents air, they can manually clear the alert code on the display panel of the heat pump unit. After clearing, the system can continue to monitor the outlet water temperature and high pressure for a certain number of consecutive days. If no abnormality exceeding the corresponding threshold occurs again, the program will automatically stop executing the protection release strategy. If an abnormality exceeding the corresponding threshold still occurs, the above operation will be repeated.

[0093] The following is based on Figure 2 The overall implementation process of this application is described below: 1. The program determines whether the protection is caused by a problem with the water circulation system; When the heat pump unit experiences a high-load protection shutdown, the heat pump unit detects and compares the changes in high-pressure P from the high-pressure sensor and outlet water temperature Tc detected by the outlet water temperature sensor before and after the compressor stops.

[0094] 1. If, during the operation of a heat pump unit, the high pressure P suddenly and rapidly rises to the set value and the unit shuts down under protection conditions without significant changes in compressor frequency and inlet water temperature, and Tc rises after the heat pump unit stops, it is determined that the protection is caused by a problem with the water circulation system.

[0095] 2. If the temperature coefficient of thermal conductivity (Tc) begins to decrease after the heat pump unit's protection trips, it is determined that the protection was caused by a problem with the heat pump unit itself. In this case, the corresponding fault code will be displayed on the screen, which must be manually cleared by the user before restarting the unit. The user needs to contact after-sales service for maintenance of the heat pump unit.

[0096] Cause: After the heat pump unit is shut down for protection, the water pump shuts off after a delay. If there is water flow, the temperature Tc will drop directly to the same as the inlet water temperature. If there is no water flow, the compressor exhaust pipe is directly connected to the upper part of the heat exchanger inside the unit after passing through the four-way valve. It is very close to the water outlet position, which is also located at the upper part of the heat exchanger. The compressor exhaust pipe has a higher temperature, which will be conducted to the stagnant water outlet pipe, causing the Tc to rise.

[0097] II. The program distinguishes the causes of water circulation system problems; The heat pump unit is equipped with a water pump power cord terminal. The water pump power cord is connected to this terminal, and a voltage detection device is installed at this terminal to detect changes in the water pump voltage V in real time.

[0098] From the first startup, the heat pump unit is programmed to automatically record the water pump voltage. During normal operation, if the heat pump unit runs continuously at the current water pump voltage for ≥m seconds, and the current water pump voltage is higher than the voltage values ​​detected in the previous m seconds, then the water pump voltage value is recorded as Vmax; if the heat pump unit runs continuously at the current water pump voltage for ≥m seconds, and the current water pump voltage is lower than the voltage values ​​detected in the previous m seconds, then the voltage value is recorded as Vmin.

[0099] 1. If the voltage is constant before the high load protection is triggered, and the voltage value is between Vmin and Vmax, it is determined that the protection is caused by air in the water circulation system.

[0100] 2. If the voltage trend continues to rise, fall, or fluctuate before the high load protection is triggered, and the pump voltage is >Vmax or <Vmin when the high load protection occurs, it is determined that the pump stops due to voltage issues.

[0101] III. After the program determines that the cause is related to the water circulation system, the subsequent operation program of the heat pump unit will automatically activate the following processing method: 1. Handling methods for air leakage in the water circulation system that could cause protection issues; From the first startup, the heat pump unit is equipped with the ability to automatically record, store, and analyze data. It memorizes the outlet water temperature and high pressure under different ambient temperatures, compressor frequencies, and inlet water temperatures during normal operation. When a large amount of air accumulates in the water circulation system, causing the heat pump unit to run out of water, if the system detects that the outlet water temperature is greater than or equal to the normal outlet water temperature corresponding to the ambient temperature, compressor frequency, and inlet water temperature plus 'a', or the high pressure is greater than or equal to the normal high pressure corresponding to the ambient temperature, compressor frequency, and inlet water temperature plus 'b', it can be determined that air is causing or has already caused a lack of water flow in the water circulation system. The heat pump unit will immediately shut down, and the display panel will show a warning code indicating air in the water circulation system and emit a buzzer sound to remind the user for a short period of time. After an interval of time 't', the air floats above the pipes and no longer blocks the water flow. The heat pump unit and water pump will then restart according to the startup procedure.

[0102] After the user replenishes water and vents air, they can manually clear the reminder code on the display panel. Upon receiving the message, the program will continue to monitor the outlet water temperature and high pressure for a certain number of consecutive days (n). If no further abnormalities occur, the program will automatically shut down this processing method. If abnormalities still occur, the above operation will be repeated.

[0103] 2. Handling procedures for water pumps stopping due to voltage issues and triggering protection mechanisms; 1. When the heat pump unit is running: Real-time voltage V is detected during runtime: V≥Vmax-2 or V≤Vmin+2: Activate the water pump voltage regulator to adjust the water pump voltage in advance and avoid the water pump stopping due to excessively high or low voltage or fluctuations.

[0104] If V ≤ Vmax-5 or V ≥ Vmin+5, turn off the water pump voltage regulator.

[0105] Simultaneously, the program records and analyzes the voltage changes at different times each day since the protection was activated. If the voltage changes are irregular, the voltage regulator is started and stopped according to the above method. If the voltage has a certain regularity, only exceeding Vmax or falling below Vmin during certain fixed time periods each day, the voltage regulator is started n minutes before these fixed time periods and stopped n minutes after. If there is a conflict with the above start / stop operation, the voltage regulator is ensured to be in an operating state to avoid stopping and affecting user operation.

[0106] 2. When the heat pump unit is shut down; If the water pump voltage regulator is not started, when the heat pump unit and water pump are about to run, determine whether to start or stop the regulator according to step 1. Start the regulator before the water pump starts running and stop the regulator after the water pump is turned off.

[0107] It should be noted that, for the sake of simplicity, the foregoing method embodiments are all described as a series of actions. However, those skilled in the art should understand that this application is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously according to this application. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to this application.

[0108] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods according to the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0109] This application also provides a heat pump unit control device for implementing the above-described heat pump unit control method, the heat pump unit control device comprising: The first acquisition module is used to acquire the outlet water temperature data of the heat pump unit during the protection cycle of the high load protection if the high load protection is triggered. The first determining module is used to determine the water temperature change state based on the water temperature data. The second determining module is used to determine the protection trigger object based on the change in the outlet water temperature. The first execution module is used to execute a protection release strategy based on the protection trigger object.

[0110] The control device of this heat pump unit detects the outlet water temperature data within the protection cycle when the high load protection is triggered. By using the outlet water temperature data, the water flow status in the water circulation system can be determined, thereby determining whether the high load protection is caused by the water circulation system. This allows the protection trigger object to be identified, and then the protection disconnection strategy is executed based on the protection trigger object, so that the heat pump unit can automatically return to the normal operating state and avoid affecting the user.

[0111] It should be noted that the first acquisition module in this embodiment can be used to execute step S10 in this application embodiment, the first determination module in this embodiment can be used to execute step S20 in this application embodiment, the second determination module in this embodiment can be used to execute step S30 in this application embodiment, and the first execution module in this embodiment can be used to execute step S40 in this application embodiment.

[0112] Furthermore, the second determining module includes; The first judgment unit is used to determine whether the outlet water temperature rises within the first preset time after the heat pump unit stops after the high-pressure load protection is triggered. The first determining unit is used to determine that if the outlet water temperature rises within a first preset time after the heat pump unit stops, the protection trigger object is the water circulation system of the heat pump unit.

[0113] Further, the first determining unit includes: The first acquisition subunit is used to acquire the high pressure, compressor frequency and inlet water temperature of the heat pump unit during the protection cycle of the high load protection if the outlet water temperature rises within a first preset time after the heat pump unit stops. The second acquisition subunit is used to acquire the frequency range of the compressor frequency and the inlet water temperature range within a second preset time before the high load protection is triggered. The first judgment subunit is used to determine whether the frequency range is less than a first threshold, the water inlet range is less than a second threshold, and the high pressure rises to a protection threshold. The first determining subunit is used to determine that the protection trigger object is the water circulation system of the heat pump unit if the frequency range is less than a first threshold, the inlet water range is less than a second threshold, and the high pressure rises to a protection threshold.

[0114] Furthermore, the protection trigger object is a water circulation system; the first execution module includes: The first acquisition unit is used to acquire the water pump voltage data of the water circulation system; The second determining unit is used to determine, based on the water pump voltage data, whether the triggering cause is an air blockage or an abnormal water pump voltage in the water circulation system. The first execution unit is used to execute the protection release strategy based on the triggering reason.

[0115] Further, the second determining unit includes: The second judgment subunit is used to determine whether the water pump voltage is stable before the high load protection is triggered based on the water pump voltage data. The second determining subunit is used to determine that if the water pump voltage is stable before triggering the high load protection, the triggering cause is an air blockage in the water circulation system. The third determining subunit is used to determine that the triggering cause is abnormal water pump voltage if the water pump voltage is unstable before triggering high load protection.

[0116] Furthermore, the second determination subunit includes: The first determining unit is used to determine the maximum stable voltage and the minimum stable voltage of the heat pump unit after it is started from the water pump voltage data. A first execution unit is used to obtain a stable voltage range using the maximum stable voltage and the minimum stable voltage; The first judgment unit is used to determine whether the water pump voltage is within the stable voltage range within a third preset time before the high load protection is triggered. The first determining unit is configured to determine that the water pump voltage is stable before triggering the high load protection if the water pump voltage is within the stable voltage range for a third preset time period before triggering the high load protection.

[0117] Furthermore, the triggering reason is an abnormal water pump voltage, and the first execution module includes: The second execution unit is used to obtain a stable voltage range based on the water pump voltage data; The third determining unit is used to determine a target start-up voltage range and a target shutdown voltage range based on the stable voltage range, wherein the stable voltage range is truly included in the target start-up voltage range, and the target shutdown voltage range is truly included in the target start-up voltage range; The first starting unit is used to start the water pump voltage regulating device when the water pump voltage is within the target starting voltage range; The first shut-off unit is used to shut off the water pump voltage regulating device when the water pump voltage is within the target shut-off voltage range.

[0118] Reference Figure 3 In terms of hardware structure, the electronic device may include components such as a communication module 10, a memory 20, and a processor 30. In the electronic device, the processor 30 is connected to both the memory 20 and the communication module 10. The memory 20 stores a computer program, which is executed by the processor 30. When the computer program is executed, it implements the steps of the above-described method embodiments.

[0119] The communication module 10 can connect to external communication devices via a network. The communication module 10 can receive requests from the external communication devices and can also send requests, instructions, and information to the external communication devices. The external communication devices can be other electronic devices, servers, or IoT devices, such as televisions, etc.

[0120] The memory 20 can be used to store software programs and various data. The memory 20 may primarily include a program storage area and a data storage area. The program storage area may store the operating system, at least one application program required for a function (e.g., acquiring the outlet water temperature data of the heat pump unit during the protection cycle of the high-load protection if high-load protection is triggered), etc.; the data storage area may include a database, and may store data or information created based on system usage, etc. Furthermore, the memory 20 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.

[0121] The processor 30 is the control center of the electronic device. It connects various parts of the electronic device via various interfaces and lines. By running or executing software programs and / or modules stored in the memory 20, and by calling data stored in the memory 20, it performs various functions and processes data, thereby providing overall monitoring of the electronic device. The processor 30 may include one or more processing units; optionally, the processor 30 may integrate an application processor and a modem processor. The application processor mainly handles the operating system, user interface, and applications, while the modem processor mainly handles wireless communication. It is understood that the modem processor may not be integrated into the processor 30.

[0122] although Figure 3 Not shown, but the above-described electronic device may further include a circuit control module for connecting to a power supply to ensure the normal operation of other components. Those skilled in the art will understand that... Figure 3 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.

[0123] The present invention also proposes a computer-readable storage medium having a computer program stored thereon. The computer-readable storage medium may be... Figure 3 The memory 20 in the electronic device may also be at least one of ROM (Read-Only Memory) / RAM (Random Access Memory), magnetic disk, optical disk, etc. The computer-readable storage medium includes a number of instructions to cause a terminal device with a processor (which may be a television, automobile, mobile phone, computer, server, terminal, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0124] In this invention, the terms "first," "second," "third," "fourth," and "fifth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0125] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0126] Although embodiments of the present invention have been shown and described above, the scope of protection of the present invention is not limited thereto. It is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, and substitutions to the above embodiments within the scope of the present invention, and such changes, modifications, and substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A control method for a heat pump unit, characterized in that, The heat pump unit control method includes: If high load protection is triggered, the outlet water temperature data of the heat pump unit during the protection cycle of the high load protection is obtained. Determine the water temperature change status based on the water temperature data; The protection trigger target is determined based on the change in the outlet water temperature. The protection release strategy is executed based on the protection trigger object.

2. The heat pump unit control method as described in claim 1, characterized in that, The step of determining the protection trigger object based on the change in the outlet water temperature includes: Determine whether the outlet water temperature rises within the first preset time after the heat pump unit stops following the triggering of high-pressure load protection; If the outlet water temperature rises within the first preset time after the heat pump unit stops, the protection trigger target is determined to be the water circulation system of the heat pump unit.

3. The heat pump unit control method as described in claim 2, characterized in that, If the outlet water temperature rises within a first preset time after the heat pump unit stops, the protection trigger target is determined to be the water circulation system of the heat pump unit, including: If the outlet water temperature rises within the first preset time after the heat pump unit stops, the high pressure, compressor frequency and inlet water temperature of the heat pump unit during the protection cycle of the high load protection are obtained. Obtain the frequency range of the compressor frequency and the inlet water temperature range within a second preset time period before the high load protection is triggered; Determine whether the frequency range is less than a first threshold, the inlet water range is less than a second threshold, and the high pressure rises to a protection threshold. If the frequency range is less than the first threshold, the inlet water range is less than the second threshold, and the high pressure rises to the protection threshold, then the protection trigger object is determined to be the water circulation system of the heat pump unit.

4. The heat pump unit control method as described in claim 1, characterized in that, The protection triggering object is a water circulation system; the protection release strategy based on the protection triggering object includes: Obtain the water pump voltage data of the water circulation system; Based on the water pump voltage data, the triggering cause was determined to be either an air blockage in the water circulation system or an abnormal water pump voltage. The protection release strategy is executed based on the triggering reason.

5. The heat pump unit control method as described in claim 4, characterized in that, The determination of the triggering cause as an air blockage or abnormal water pump voltage in the water circulation system based on the water pump voltage data includes: Determine whether the water pump voltage is stable before triggering the high load protection based on the water pump voltage data. If the water pump voltage stabilizes before triggering the high load protection, the triggering cause is determined to be an air blockage within the water circulation system. If the water pump voltage is unstable before the high load protection is triggered, the triggering cause is determined to be an abnormal water pump voltage.

6. The heat pump unit control method as described in claim 5, characterized in that, The step of determining whether the water pump voltage is stable before triggering high load protection based on the water pump voltage data includes: The maximum and minimum stable voltages of the heat pump unit after startup are determined from the water pump voltage data. The stable voltage range is obtained by using the maximum stable voltage and the minimum stable voltage; Determine whether the water pump voltage is within the stable voltage range within a third preset time period before triggering the high load protection; If the water pump voltage is within the stable voltage range within a third preset time period before triggering the high load protection, then the water pump voltage is determined to be stable before triggering the high load protection.

7. The heat pump unit control method as described in claim 4, characterized in that, The triggering reason is abnormal water pump voltage, and the execution of the protection release strategy based on the triggering reason includes: The stable voltage range is obtained based on the water pump voltage data; The target start-up voltage range and the target shutdown voltage range are determined based on the stable voltage range, wherein the stable voltage range is truly contained within the target start-up voltage range, and the target shutdown voltage range is truly contained within the target start-up voltage range; When the water pump voltage is within the target starting voltage range, the water pump voltage regulating device is activated; When the water pump voltage is within the target shut-off voltage range, the water pump voltage regulating device is turned off.

8. A heat pump unit control device, characterized in that, The heat pump unit control device includes: The first acquisition module is used to acquire the outlet water temperature data of the heat pump unit during the protection cycle of the high load protection if the high load protection is triggered. The first determining module is used to determine the water temperature change state based on the water temperature data. The second determining module is used to determine the protection trigger object based on the change in the outlet water temperature. The first execution module is used to execute a protection release strategy based on the protection trigger object.

9. An electronic device, characterized in that, The electronic device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program, when executed by the processor, implements the steps of the heat pump unit control method as described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the steps of the heat pump unit control method as described in any one of claims 1 to 7.

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