Heat pump preheating control method and device, air source heat pump and computer readable storage medium

Abstract

The embodiment of the invention provides a heat pump preheating control method and device, an air source heat pump and a computer readable storage medium, the heat pump preheating control method comprises a compressor and a preheating module, and the heat pump preheating control method comprises the steps that in response to a starting instruction received by the heat pump, whether the compressor starting condition is met or not is determined; in response to determining that the compressor starting condition is not met, executing circulating preheating operation until the compressor eliminates the starting fault; the circulating preheating operation comprises the steps that the compressor is controlled to be stopped or stopped, and the preheating module is controlled to preheat the compressor; and the compressor is controlled to be started, and whether the compressor has a starting fault or not is determined.

Description

Technical Field

[0001] The present application relates to the field of heat pump technology, and in particular to a heat pump preheating control method, device, air source heat pump and computer-readable storage medium. Background Art

[0002] Low Temperature Air Source Heat Pump (LT-ASHP) is an energy-saving device that uses low-grade energy in the ambient atmosphere to convert low-grade heat energy into high-grade heat energy through the reverse Carnot cycle principle. Low-temperature air source heat pumps are widely used in the fields of heating, hot water supply, etc., and are particularly suitable for working in low-temperature environments such as below -15°C. They have the advantages of high efficiency, environmental protection, and economy. In related technologies, when a low-temperature air source heat pump is started in a low-temperature environment, the compressor may fail to start normally, which may cause serious problems such as structural damage to the compressor. Summary of the invention

[0003] The embodiments of the present application provide a heat pump preheating control method, device, air source heat pump and computer-readable storage medium, which can cyclically preheat the compressor when the heat pump is turned on, eliminate the startup failure of the compressor, and ensure the safety and reliability of the compressor when starting.

[0004] In a first aspect, an embodiment of the present application provides a heat pump preheating control method, wherein the heat pump includes a compressor and a preheating module, and the heat pump preheating control method includes: in response to the heat pump receiving a power-on instruction, determining whether the compressor start-up conditions are met; in response to determining that the compressor start-up conditions are not met, performing a cyclic preheating operation until the compressor eliminates a start-up fault; the cyclic preheating operation includes: controlling the compressor to remain shut down or stop starting, and controlling the preheating module to preheat the compressor; controlling the compressor to start, and determining whether a start-up fault occurs in the compressor.

[0005] In some embodiments, the heat pump includes a circulating water pump and an auxiliary heat source, the circulating water pump is used to drive the circulation of the refrigerant, and the auxiliary heat source is used to auxiliary heat the refrigerant; the heat pump preheating control method includes: in response to determining that the compressor start-up conditions are not met, controlling the circulating water pump and the auxiliary heat source to start.

[0006] In some embodiments, controlling the preheating module to preheat the compressor includes: determining a target preheating time for the current preheating according to the current preheating times; in response to the preheating module preheating the compressor for the first time, using the first preset preheating time as the target preheating time for the current preheating; in response to the preheating module preheating the compressor for the second time, using the second preset preheating time as the target preheating time for the current preheating; in response to the preheating module preheating the compressor for the i+1th time, determining the target preheating time for the current preheating according to the following formula:

[0007]

[0008] Among them, t i is the target preheating time when the preheating module preheats the compressor for the i-th time, t i+1 is the target preheating time when the preheating module preheats the compressor for the i+1th time, where i is a positive integer greater than 1.

[0009] In some embodiments, after the compressor eliminates the startup fault, the heat pump preheating control method includes: obtaining the number of preheating times of the cyclic preheating operation, the preheating time of each preheating, and the outdoor ambient temperature; updating a first preset preheating time according to the number of preheating times of the cyclic preheating operation, the preheating time of each preheating, and the outdoor ambient temperature, the first preset preheating time being the target preheating time for the first preheating.

[0010] In some embodiments, controlling the preheating module to preheat the compressor includes: in response to the preheating module preheating the compressor for the first time, determining whether a condition for stopping preheating is met; in response to determining that the condition for stopping preheating is met, controlling the preheating module to stop preheating; the condition for stopping preheating includes at least one of the following conditions: the actual preheating time reaches the target preheating time for the current preheating; the exhaust temperature of the compressor is greater than the second exhaust temperature threshold; the exhaust temperature of the compressor is greater than the third exhaust temperature threshold; the outdoor ambient temperature is greater than or equal to the second external ring temperature threshold; wherein the second exhaust temperature threshold is a preset value; the third exhaust temperature threshold is determined based on the outdoor ambient temperature.

[0011] In some embodiments, determining whether the compressor start-up conditions are met includes: obtaining the outdoor ambient temperature and the exhaust temperature of the compressor, and determining a first exhaust temperature threshold based on the outdoor ambient temperature; determining whether the outdoor ambient temperature is less than a first external ring temperature threshold and whether the exhaust temperature is less than a first exhaust temperature threshold; in response to determining that the outdoor ambient temperature is less than the first external ring temperature threshold and the exhaust temperature is less than the first exhaust temperature threshold, determining that the compressor start-up conditions are not met; in response to determining that the outdoor ambient temperature is greater than or equal to the first external ring temperature threshold and / or the exhaust temperature is greater than or equal to the first exhaust temperature threshold, determining that the compressor start-up conditions are met.

[0012] In some embodiments, controlling the preheating module to preheat the compressor includes: determining the preheating power of the preheating module according to the outdoor ambient temperature; and controlling the preheating module to preheat according to the preheating power.

[0013] In a second aspect, an embodiment of the present application provides a heat pump preheating control device, comprising: a trial start control circuit, configured to determine whether the compressor start-up conditions are met; a preheating control circuit, configured to perform a cyclic preheating operation until the compressor eliminates the start-up fault; the cyclic preheating operation includes: controlling the compressor to remain shut down or stop starting, and controlling the preheating module to preheat the compressor; controlling the compressor to start, and determining whether the compressor has a start-up fault.

[0014] In a third aspect, an embodiment of the present application provides an air source heat pump, comprising: a compressor; a preheating module, configured to preheat the compressor; a memory, storing a computer program; and a processor, wherein the computer program, when executed by the processor, implements the heat pump preheating control method as described in any of the above embodiments.

[0015] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program is loaded by a processor to execute the steps in the heat pump preheating control method described above.

[0016] The heat pump preheating control method provided in the embodiment of the present application first determines whether the compressor starting conditions are met when the heat pump receives a start-up instruction, and performs a cyclic preheating operation when it is determined that the compressor starting conditions are not met, so as to use the preheating module to preheat the compressor once or multiple times in a cycle according to the actual working condition of the compressor until the compressor eliminates the starting fault; in this way, on the one hand, the compressor can be preheated when necessary to ensure that the compressor can be reliably started in a safe state after preheating, and on the other hand, the time required for the preheating stage can be greatly compressed, the response speed of the heat pump startup can be improved, and the user's startup needs can be met more promptly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 is a flow chart of a heat pump preheating control method provided by some embodiments of the present application;

[0019] Figure 2 is a partial flow chart of a heat pump preheating control method provided in some embodiments of the present application;

[0020] Figure 3 is another partial flow chart of the heat pump preheating control method provided by some embodiments of the present application;

[0021] Figure 4 is another partial flow chart of the heat pump preheating control method provided in some embodiments of the present application;

[0022] Figure 5 is another partial flow chart of the heat pump preheating control method provided in some embodiments of the present application;

[0023] Figure 6 is another partial flow chart of the heat pump preheating control method provided in some embodiments of the present application;

[0024] Figure 7 is another partial flow chart of the heat pump preheating control method provided in some embodiments of the present application;

[0025] Figure 8 This is a structural diagram of an air source heat pump provided in some embodiments of the present application.

[0026] Description of main component symbols:

[0027] 1- air source heat pump, 10- processor, 20- memory. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.

[0029] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0030] “A and / or B” includes the following three combinations: A only, B only, and a combination of A and B.

[0031] The use of "suitable for" or "configured to" in this application is meant to be open and inclusive language, which does not exclude devices that are suitable for or configured to perform additional tasks or steps. In addition, the use of "based on" is meant to be open and inclusive, because the process, step, calculation or other action "based on" one or more stated conditions or values ​​can be based on additional conditions or values ​​beyond the stated values ​​in practice.

[0032] In this application, the word "exemplary" is used to mean "used as an example, illustration, or description." Any embodiment described in this application as "exemplary" is not necessarily to be construed as being preferred or advantageous over other embodiments. The following description is given to enable any technician in the field to implement and use the present application. In the following description, details are listed for the purpose of explanation. It should be understood that a person of ordinary skill in the art can recognize that the present application can be implemented without using these specific details. In other instances, well-known structures and processes will not be elaborated in detail to avoid obscuring the description of the present application with unnecessary details. Therefore, the present application is not intended to be limited to the embodiments shown, but is consistent with the widest scope consistent with the principles and features disclosed in the present application.

[0033] like Figure 1As shown, in the first aspect, the embodiment of the present application provides a heat pump preheating control method for controlling a heat pump. The heat pump may be an air source heat pump 1, comprising a compressor and a preheating module. The preheating module is configured to preheat the compressor; the type of the preheating module may be determined according to actual needs, and may be, for example, a winding coil built into the compressor, an external heating source disposed outside the compressor, etc., which is not limited in the embodiment of the present application.

[0034] Here, the heat pump preheating control method includes S10 to S30, which can cyclically preheat the compressor when the heat pump is turned on, eliminate the startup failure of the compressor, and ensure the safety and reliability of the compressor when it is started.

[0035] S10: In response to the heat pump receiving a start-up instruction, determining whether a compressor start-up condition is met.

[0036] In some embodiments, the power-on command can be directly input by the user to the heat pump through an interactive terminal such as a switch button, a remote controller, or an application on a smart terminal. In other embodiments, the power-on command can be automatically generated by the control system of the heat pump; for example, after the heat pump reaches the temperature and stops, if the heat pump restart conditions such as reaching the restart time and the coolant temperature is lower than the restart threshold are met, the control system of the heat pump can generate a power-on command to control the heat pump to restart.

[0037] After receiving the power-on command, the heat pump will not start up directly, but needs to first determine whether the compressor start-up conditions are met. The specific method of determining whether the compressor start-up conditions are met can be determined according to actual needs, and the embodiment of the present application does not limit this.

[0038] S20: In response to determining that the compressor startup condition is not satisfied, a cyclic preheating operation is performed until the compressor eliminates the startup failure. Here, the cyclic preheating operation includes S21-S22.

[0039] S21: Control the compressor to remain stopped or stop starting, and control the preheating module to preheat the compressor.

[0040] Here, if the compressor is still in the shutdown state, the compressor is controlled to remain in the shutdown state; if the compressor is in the startup state, the compressor is controlled to stop starting. At the same time, the preheating module is controlled to preheat the compressor to increase the temperature of the refrigerant in the compressor.

[0041] S22: Control the compressor to start, and determine whether a startup failure occurs in the compressor.

[0042] After controlling the preheating module to preheat the compressor once, the compressor can be controlled to start, and during the startup process, it can be determined whether a startup failure occurs in the compressor. Here, the startup failure may include types of fault phenomena such as current protection of the compressor and loss of step of the compressor, which are not limited in the embodiments of the present application. When it is determined that a startup failure occurs in the compressor, S21 to S22 are executed again, that is, the compressor is controlled to stop starting, and the preheating module is controlled to preheat the compressor again. When it is determined that no startup failure occurs in the compressor, the compressor can be controlled to continue starting, so that the heat pump can be turned on and run to meet the user's needs. According to actual working conditions, in a cyclic preheating operation, the preheating module preheats the compressor at least once.

[0043] S30: In response to determining that the compressor start condition is met, control the compressor to start. When it is determined that the compressor start condition is met, it can be determined that there is no safety risk, and the compressor can be controlled to start, so that the heat pump can be turned on to meet the user's usage needs.

[0044] Compared with the related art, the heat pump preheating control method provided in the embodiment of the present application first determines whether the compressor starting conditions are met when the heat pump receives a start-up instruction, and performs a cyclic preheating operation when it is determined that the compressor starting conditions are not met, so as to use the preheating module to preheat the compressor once or multiple times in a cycle according to the actual working condition of the compressor until the compressor eliminates the starting fault; in this way, on the one hand, the compressor can be preheated when necessary to ensure that the compressor can be reliably started in a safe state after preheating, and on the other hand, the time required for the preheating stage can be greatly compressed, the response speed of the heat pump startup can be improved, and the user's startup needs can be met more promptly.

[0045] In some embodiments, the heat pump includes a circulating water pump and an auxiliary heat source; the circulating water pump is used to drive the circulation of the refrigerant, and the auxiliary heat source is used to auxiliary heat the refrigerant. The type of auxiliary heat source can be determined according to actual needs, and can be, for example, electric auxiliary heating and other types, which are not limited in the embodiments of the present application; illustratively, the heat pump can include a buffer water tank, which is connected to the refrigerant circuit and connected to the circulating water pump through a refrigerant circulation pipeline. The auxiliary heat source is used to heat the refrigerant in the buffer water tank at startup. Figure 2 As shown, the heat pump preheating control method may include S40.

[0046] S40: In response to determining that the compressor start-up condition is not met, controlling the circulating water pump and the auxiliary heat source to start.

[0047] When it is determined that the compressor start-up conditions are not met, a circulation preheating operation needs to be performed first to preheat the compressor; at this time, the circulation water pump and the auxiliary heat source can be controlled to start, and the auxiliary heat source can be used to auxiliary heat the refrigerant, and the circulation water pump can be used to transport the heated refrigerant to the heat-using terminals such as hot water faucets / showers and heating panels to meet the user's heating needs as soon as possible. Furthermore, after the compressor is started to allow the heat pump to operate normally for heating, the auxiliary heat source can be turned off to save energy.

[0048] By setting S40, the heat pump preheating control method provided in the embodiment of the present application can start the circulating water pump and the auxiliary heat source first when the compressor cannot be started temporarily, and the auxiliary heat source provides the required heat to the user to meet the user's heating needs as soon as possible.

[0049] like Figure 3 As shown, in some embodiments, S10 may include S11-S14.

[0050] S11: Acquire the outdoor ambient temperature and the exhaust temperature of the compressor, and determine a first exhaust temperature threshold according to the outdoor ambient temperature.

[0051] Here, the outdoor ambient temperature can be measured in real time by a temperature sensor disposed on the outdoor side, or it can be obtained from local meteorological data released by a meteorological measurement unit through a communication network, and the embodiments of the present application are not limited to this. The exhaust temperature of the compressor can be measured in real time by a temperature sensor disposed near the exhaust port of the compressor. After obtaining the outdoor ambient temperature, a first exhaust temperature threshold corresponding to the outdoor ambient temperature can be determined, and the first exhaust temperature threshold can be used as a sign for judging the high and low exhaust temperature of the compressor.

[0052] S12: Determine whether the outdoor ambient temperature is less than the first external temperature threshold and whether the exhaust temperature is less than the first exhaust temperature threshold. Here, the first external temperature threshold can be pre-set in the control system of the heat pump as a sign of judging the outdoor ambient temperature.

[0053] S13: In response to determining that the outdoor ambient temperature is less than the first outer ring temperature threshold and the exhaust temperature is less than the first exhaust temperature threshold, determining that the compressor start condition is not satisfied.

[0054] When it is determined that the outdoor ambient temperature is lower than the first outer ring temperature threshold and the exhaust temperature is lower than the first exhaust temperature threshold, it can be determined that the compressor is in a relatively harsh outdoor low temperature environment. If the compressor is controlled to start directly, the compressor will face a greater risk of start-up failure and malfunction. Therefore, it can be determined that the compressor start-up conditions are not met.

[0055] S14: In response to determining that the outdoor ambient temperature is greater than or equal to the first external temperature threshold and / or the exhaust temperature is greater than or equal to the first exhaust temperature threshold, determining that the compressor start condition is satisfied.

[0056] When it is determined that the outdoor ambient temperature is greater than or equal to the first outer ring temperature threshold and / or the exhaust temperature is greater than or equal to the first exhaust temperature threshold, it is determined that the compressor start condition is met. In other words, when it is determined that the outdoor ambient temperature is greater than or equal to the first outer ring temperature threshold, or the exhaust temperature is greater than or equal to the first exhaust temperature threshold, or the outdoor ambient temperature is greater than or equal to the first outer ring temperature threshold and the exhaust temperature is greater than or equal to the first exhaust temperature threshold, it can be determined that the compressor start condition is met, and the compressor can be controlled to start directly.

[0057] By setting S11 to S14, it is possible to more accurately determine whether the compressor startup conditions are met, and then accurately perform the cyclic preheating operation when the compressor startup conditions are not met, thereby timely eliminating the risk of compressor startup failure.

[0058] like Figure 4 As shown, in some embodiments, S21 may include S2111 to S2114 to control the preheating module to preheat the compressor.

[0059] S2111: Determine the target preheating time for the current preheating according to the current preheating times.

[0060] Here, the current preheating number refers to the sequence number of the preheating module when executing the current preheating since entering the cyclic heating operation. For example, if the preheating module has not preheated the compressor three times before executing the current preheating since entering the cyclic heating operation, the current preheating number is the first preheating; if the preheating module has preheated the compressor three times before executing the current preheating since entering the cyclic heating operation, the current preheating number is the fourth preheating; and so on. The target preheating time is the preheating operation time that the preheating module needs to maintain when executing the current preheating, which is related to the current preheating number.

[0061] S2112: In response to the preheating module performing a first preheating on the compressor, a first preset preheating time is used as a target preheating time for the current preheating.

[0062] When the preheating module preheats the compressor for the first time, it can be determined that the current preheating number is 1, and the first preset preheating time can be used as the target preheating time for the current preheating. Here, the first preset preheating time is a preset value pre-set in the control system of the heat pump. The first preset preheating time and the first preheating are set correspondingly, and can be directly called when the current preheating number is 1.

[0063] S2113: In response to the preheating module, the compressor is preheated for the second time, and the second preset preheating time is used as the target preheating time for the current preheating.

[0064] When the preheating module preheats the compressor for the second time, it can be determined that the current preheating number is two, and then the second preset preheating time can be used as the target preheating time for the current preheating. Here, the second preset preheating time is a preset value pre-set in the control system of the heat pump. The second preset preheating time and the second preheating are set correspondingly, and can be directly called when the current preheating number is 2.

[0065] S2114: In response to the preheating module performing the (i+1)th preheating on the compressor, a target preheating time for the current preheating is determined according to the following formula:

[0066]

[0067] Among them, t i is the target preheating time when the preheating module preheats the compressor for the i-th time, t i+1 It is the target preheating time when the preheating module preheats the compressor for the i+1th time, where i is a positive integer and greater than 1.

[0068] Exemplarily, according to the above formula, when the preheating module preheats the compressor for the third time, the target preheating time for the third preheating is 2t2; when the preheating module preheats the compressor for the fourth time, the target preheating time for the third preheating is 3t2; and so on, which will not be repeated here.

[0069] By setting S2111 to S2114, the compressor can be preheated in cycles, and at least from the third preheating, the target preheating time of each preheating is gradually increased as the number of preheating times increases, and the target preheating time is adjusted according to the severity of the low-temperature environment. Specifically, when the severity of the low-temperature environment is relatively mild, the compressor can reach the starting conditions more quickly, and the time required for the preheating stage can be compressed to a large extent; when the severity of the low-temperature environment is relatively severe, such as in a deep low-temperature state such as -30°C, the target preheating time can be gradually increased to increase the preheating amount of the preheating module, and to a large extent ensure that the compressor can be reliably started within a safe temperature range.

[0070] like Figure 5 As shown, in some embodiments, after the compressor eliminates the startup fault, that is, ends the cycle preheating operation, the heat pump preheating control method may include S51-S52.

[0071] S51: Obtain the number of preheating times of the cyclic preheating operation, the preheating time of each preheating, and the outdoor ambient temperature.

[0072] S52: updating the first preset preheating time according to the number of preheating times of the cyclic preheating operation, the preheating time of each preheating, and the outdoor ambient temperature, wherein the first preset preheating time is the target preheating time for the first preheating.

[0073] By setting S51~S52, the first preset preheating time can be updated in time according to the actual working conditions and actual environmental parameters of the cyclic preheating operation after each completion of the cyclic preheating operation, so that the updated first preset preheating time can more accurately fit the actual environment of the heat pump, so that when the heat pump is started next time, the compressor can reach a safe starting state with the shortest preheating time, thereby taking into account both the startup safety of the compressor and the timeliness of the preheating process.

[0074] like Figure 6 As shown, in some embodiments, S21 may include S2121-S2122.

[0075] S2121: In response to the preheating module preheating the compressor for the first time, determining whether a stop preheating condition is met.

[0076] S2122: In response to determining that the preheating stop condition is met, controlling the preheating module to stop preheating.

[0077] Here, the stop preheating condition includes at least one of the following conditions: the actual preheating time reaches the target preheating time of the current preheating; the exhaust temperature of the compressor is greater than the second exhaust temperature threshold; the exhaust temperature of the compressor is greater than the third exhaust temperature threshold; the outdoor ambient temperature is greater than or equal to the second external temperature threshold. In other words, as long as any one of the above conditions is met, it can be determined that the stop preheating condition is met, and the preheating module can be controlled to stop preheating.

[0078] Among them, the second exhaust temperature threshold is a preset value pre-set in the control system of the heat pump; illustratively, the second exhaust temperature threshold is greater than the first exhaust temperature threshold. The third exhaust temperature threshold can be determined according to the outdoor ambient temperature, and the algorithm for determining the third exhaust temperature threshold can be determined according to actual needs, which is not limited in the embodiment of the present application; illustratively, the third exhaust temperature threshold is greater than the first exhaust temperature threshold. In this way, it is possible to directly judge whether the stop preheating condition is met based on the second exhaust temperature threshold, or to determine the third exhaust temperature threshold based on the outdoor ambient temperature, and then judge whether the stop preheating condition is met based on the third exhaust temperature threshold.

[0079] like Figure 7 As shown, in some embodiments, S21 may include S2131-S2132.

[0080] S2131: Determine the preheating power of the preheating module according to the outdoor ambient temperature.

[0081] Here, a correspondence between the outdoor ambient temperature and the preheating power of the preheating module can be pre-established in the control system of the heat pump, and different preheating powers can be set corresponding to different outdoor ambient temperatures to meet the preheating needs under different outdoor ambient temperatures. After obtaining the outdoor ambient temperature, the preheating power corresponding to the outdoor ambient temperature can be determined, thereby determining the preheating power of the preheating module.

[0082] In some examples, a plurality of outer ring temperature intervals distributed in sequence and continuously can be pre-set in the control system of the heat pump, and a corresponding preheating power value can be set for each outer ring temperature interval. As the outer ring temperature interval gradually decreases, the corresponding preheating power value can gradually increase, for example, arithmetically increasing. Exemplarily, at least four outer ring temperature intervals distributed in sequence and continuously can be set, namely, a first outer ring temperature interval less than the first outer ring temperature and greater than or equal to the second outer ring temperature, a second outer ring temperature interval less than the second outer ring temperature and greater than or equal to the third outer ring temperature, a third outer ring temperature interval less than the third outer ring temperature and greater than or equal to the fourth outer ring temperature, and a fourth outer ring temperature interval less than the fourth outer ring temperature, and the preheating power values ​​corresponding to the first outer ring temperature interval to the fourth outer ring temperature interval increase arithmetically.

[0083] S2132: Control the preheating module to perform preheating according to the preheating power.

[0084] By setting S2131~S2132, the preheating module can be more accurately controlled to preheat according to the required preheating power, which can not only effectively ensure the preheating efficiency of the compressor, but also avoid energy waste and achieve better energy-saving effects.

[0085] In a second aspect, an embodiment of the present application provides a heat pump preheating control device, comprising: a trial start control circuit, configured to determine whether the compressor start conditions are met; a preheating control circuit, configured to perform a cyclic preheating operation until the compressor eliminates the start-up fault; the cyclic preheating operation includes: controlling the compressor to remain shut down or stop starting, and controlling the preheating module to preheat the compressor; controlling the compressor to start, and determining whether the compressor has a start-up fault.

[0086] like Figure 8 As shown, in the third aspect, the embodiment of the present application provides an air source heat pump 1, which includes a compressor, a preheating module, a processor 10 and a memory 20. The preheating module is configured to preheat the compressor. The type of the preheating module can be determined according to actual needs, and can be, for example, a winding coil built into the compressor, an external heating source arranged outside the compressor, etc., which is not limited in the embodiment of the present application. The memory 20 stores a computer program, and when the computer program is executed by the processor 10, a heat pump preheating control method as provided in any of the above embodiments is implemented.

[0087] The processor 10 is connected to the memory 20, and can perform various actions and processes according to the program stored in the memory 20. Specifically, the processor 10 can be an integrated circuit chip with signal processing capabilities. The above-mentioned processor 10 can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, and can implement or execute the various methods, steps and logic block diagrams disclosed in the embodiments of the present application. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc., which can be an X86 architecture or an ARM architecture.

[0088] The memory 20 may be a volatile memory or a nonvolatile memory, or may include both volatile and nonvolatile memory. The nonvolatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example but not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronously linked dynamic random access memory (SLDRAM), and direct memory bus random access memory (DRRAM). It should be noted that the memory 20 of the method described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0089] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium on which a computer program is stored. The computer program is loaded by the processor 10 to execute the steps in the control method of any of the above embodiments.

[0090] Exemplarily, the above-mentioned computer-readable storage media may include, but are not limited to: magnetic storage devices (e.g., hard disks, floppy disks or magnetic tapes, etc.), optical disks (e.g., CDs (Compact Disks), DVDs (Digital Versatile Disks), etc.), smart cards and flash memory devices (e.g., EPROMs (Erasable Programmable Read-Only Memory), cards, sticks or key drives, etc.). The various computer-readable storage media described in the embodiments of the present application may represent one or more devices and / or other machine-readable storage media for storing information. The term "machine-readable storage medium" may include, but is not limited to, wireless channels and various other media capable of storing, containing and / or carrying instructions and / or data.

[0091] The above is a detailed introduction to a heat pump preheating control method, device, air source heat pump and computer-readable storage medium provided in the embodiments of the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for technical personnel in this field, according to the ideas of the present application, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A heat pump preheating control method, characterized in that: The heat pump comprises a compressor and a preheating module, and the heat pump preheating control method comprises: In response to the heat pump receiving a start-up instruction, determining whether a compressor start-up condition is met; In response to determining that the compressor startup condition is not met, a cyclic preheating operation is performed until the compressor eliminates the startup fault; the cyclic preheating operation includes: Controlling the compressor to remain stopped or to stop starting, and controlling the preheating module to preheat the compressor; The compressor is controlled to start, and it is determined whether a startup failure occurs in the compressor.

2. The heat pump preheating control method according to claim 1, characterized in that: The heat pump comprises a circulating water pump and an auxiliary heat source, wherein the circulating water pump is used to drive the circulating flow of the brine, and the auxiliary heat source is used to perform auxiliary heating on the brine; the heat pump preheating control method comprises: In response to determining that the compressor start-up condition is not satisfied, the circulating water pump and the auxiliary heat source are controlled to start.

3. The heat pump preheating control method according to claim 1, characterized in that: Controlling the preheating module to preheat the compressor includes: Determine the target preheating time for the current preheating according to the current preheating times; In response to the preheating module performing a first preheating on the compressor, a first preset preheating time is used as a target preheating time for the current preheating; In response to the preheating module performing a second preheating on the compressor, a second preset preheating time is used as a target preheating time for the current preheating; In response to the preheating module preheating the compressor for the (i+1)th time, the target preheating time for the preheating is determined according to the following formula: Among them, t i is the target preheating time when the preheating module preheats the compressor for the i-th time, t i+1 is the target preheating time when the preheating module preheats the compressor for the i+1th time, where i is a positive integer greater than 1.

4. The heat pump preheating control method according to claim 1, characterized in that: After the compressor eliminates the startup fault, the heat pump preheating control method includes: Obtaining the number of preheating times of the cyclic preheating operation, the preheating time of each preheating, and the outdoor ambient temperature; The first preset preheating time is updated according to the number of preheating times of the cyclic preheating operation, the preheating time of each preheating, and the outdoor ambient temperature. The first preset preheating time is the target preheating time for the first preheating.

5. The heat pump preheating control method according to claim 1, characterized in that: Controlling the preheating module to preheat the compressor includes: In response to the preheating module preheating the compressor for the first time, determining whether a stop preheating condition is met; In response to determining that the preheating stop condition is met, controlling the preheating module to stop preheating; The stop preheating condition includes at least one of the following conditions: the actual preheating time reaches the target preheating time of the current preheating; the exhaust temperature of the compressor is greater than the second exhaust temperature threshold; the exhaust temperature of the compressor is greater than the third exhaust temperature threshold; the outdoor ambient temperature is greater than or equal to the second external ring temperature threshold; The second exhaust temperature threshold is a preset value; and the third exhaust temperature threshold is determined according to the outdoor ambient temperature.

6. The heat pump preheating control method according to claim 1, characterized in that: Determine if compressor start conditions are met, including: Acquire the outdoor ambient temperature and the exhaust temperature of the compressor, and determine a first exhaust temperature threshold according to the outdoor ambient temperature; Determine whether the outdoor ambient temperature is less than a first outer ambient temperature threshold and whether the exhaust temperature is less than a first exhaust temperature threshold; In response to determining that the outdoor ambient temperature is less than the first external ambient temperature threshold and the exhaust temperature is less than the first exhaust temperature threshold, determining that a compressor start condition is not satisfied; In response to determining that the outdoor ambient temperature is greater than or equal to the first external ring temperature threshold and / or the exhaust temperature is greater than or equal to the first exhaust temperature threshold, it is determined that the compressor start condition is met.

7. The heat pump preheating control method according to claim 1, characterized in that: Controlling the preheating module to preheat the compressor includes: Determining the preheating power of the preheating module according to the outdoor ambient temperature; The preheating module is controlled to perform preheating according to the preheating power.

8. A heat pump preheating control device, characterized in that: The heat pump comprises a compressor and a preheating module, and the heat pump preheating control device comprises: a trial start control circuit configured to determine whether a compressor start condition is met; The preheating control circuit is configured to perform a cyclic preheating operation until the compressor eliminates the startup fault; the cyclic preheating operation includes: Controlling the compressor to remain stopped or to stop starting, and controlling the preheating module to preheat the compressor; The compressor is controlled to start, and it is determined whether a startup failure occurs in the compressor.

9. An air source heat pump, characterized in that: include: compressor; a preheating module, configured to preheat the compressor; a memory storing a computer program; A processor, wherein when the computer program is executed by the processor, the heat pump preheating control method according to any one of claims 1 to 7 is implemented.

10. A computer-readable storage medium, characterized in that: A computer program is stored thereon, and the computer program is loaded by a processor to execute the steps in the heat pump preheating control method according to any one of claims 1 to 7.

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