Air source heat pump defrosting control method and system based on cold and wet island effect

Abstract

The invention provides an air source heat pump defrosting control method and system based on the cold and wet island effect, and belongs to the technical field of air source heat pump defrosting control. The method comprises the steps that environment side parameters and air source heat pump unit side parameters are obtained; according to the environment side parameters and the air source heat pump unit side parameters, the cold and wet island effect strength of each area unit of the air source heat pump is determined, and a cold and wet island effect loss coefficient is calculated; the air source heat pump array is partitioned on the basis of the cold and wet island effect loss coefficient, the defrosting time of each area of the array is recorded, and the total defrosting timing is calculated; and the air source heat pump unit is controlled to conduct defrosting based on the total defrosting timing. Through the defrosting control strategy of real-time judgment, area normalization and accumulative timing, dynamic and accurate defrosting control is achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of defrosting control of air source heat pumps, and in particular relates to a defrosting control method of an air source heat pump based on a cold and wet island effect. Background Art

[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] As a highly efficient and energy-saving renewable energy technology, air source heat pumps can effectively reduce building energy consumption and carbon emissions, and have received widespread attention around the world. In recent years, especially under the vigorous promotion of "clean heating", air source heat pumps have become a reliable technology to replace traditional heating methods such as coal and have been widely used.

[0004] At present, the air source heat pump array layout has been widely used in medium and large heating projects, and has become the main layout form of efficient heating systems. However, with the further expansion of the heating scale, the central unit of the array is significantly affected by the "cold and wet island effect", resulting in a decrease in the unit's inlet air temperature and an increase in the frequency of defrosting, which greatly increases the unit's frost risk and defrosting energy loss; while the outer units are less affected by the "cold and wet island effect" and have a lower frosting frequency. However, the existing defrost control strategy has the problem of insufficient accuracy, which can easily lead to a decrease in the performance of the central unit of the array due to failure to defrost in time, as well as energy waste due to frost-free defrosting of the outer units, further reducing the overall operating efficiency of the system. Summary of the invention

[0005] In order to overcome the deficiencies of the above-mentioned prior art, the present invention proposes an air source heat pump defrosting control method and system based on the cold and wet island effect. By real-time monitoring the intensity of the "cold and wet island effect" of air source heat pump units in different regions, the defrosting timing of each area of ​​the array is recorded, and the defrosting demand of each area is normalized. After the standardized timing of each area of ​​the array is obtained, the total defrosting timing is accumulated and calculated. After the defrosting judgment conditions are met, the unit starts to defrost. Through the defrosting control strategy of "real-time judgment, regional normalization, and cumulative timing", dynamic and precise defrosting control is achieved, which promotes the large-scale application and development of air source heat pump centralized heating systems and helps the air source heat pump array to operate stably and efficiently.

[0006] To achieve the above objectives, one or more embodiments of the present invention provide the following technical solutions: In a first aspect, a defrosting control method for an air source heat pump based on a cold and wet island effect is disclosed, comprising: Obtain environmental parameters and air source heat pump unit parameters; Determine the cold and wet island effect intensity of each area unit of the air source heat pump according to the parameters on the environmental side and the parameters on the air source heat pump unit side, and calculate the cold and wet island effect loss coefficient; Based on the cold and wet island effect loss coefficient, the air source heat pump array is divided into zones and the defrost time of each zone of the array is recorded to calculate the total defrost time. The air source heat pump unit is controlled to defrost based on the total defrost timing.

[0007] Furthermore, the environmental side parameters include ambient temperature, ambient relative humidity and ambient atmospheric pressure; the air source heat pump unit side parameters include air source heat pump unit coil temperature, unit inlet air temperature and unit inlet air relative humidity.

[0008] Furthermore, the calculation expression of the intensity of the cold and wet island effect is: Δ T CH =(2 T a – T wba )–(2 T in – T wbin ) Among them, Δ T CH is the intensity of the cold and wet island effect; T a is the ambient temperature; T wba is the ambient wet bulb temperature; T in is the unit inlet air temperature; T wbin It is the wet bulb temperature of the air inlet to the unit.

[0009] Furthermore, the calculation expression of the cold and wet island effect loss coefficient is: , 0≤ e CHL ≤ x 3 in, e CHL is the cold and wet island effect loss coefficient; A and B are constants; x 3 means the maximum value of the cold and wet island effect loss coefficient.

[0010] Furthermore, the air source heat pump array is partitioned based on the cold and wet island effect loss coefficient, specifically including: When the cold and wet island effect loss coefficient is greater than or equal to zero and less than the first preset value, the area where the air source heat pump array unit is located is a low risk area affected by the cold and wet island effect of the air source heat pump array; When the cold and wet island effect loss coefficient is greater than or equal to the first preset value and less than the second preset value, the area where the air source heat pump array unit is located is a medium risk area affected by the cold and wet island effect of the air source heat pump array; When the cold-humidity island effect loss coefficient is greater than or equal to the second preset value and less than or equal to the third preset value, the area where the air source heat pump array unit is located is a high-risk area affected by the cold-humidity island effect of the air source heat pump array.

[0011] Furthermore, the total defrost timing is calculated by accumulating the standardized timings of the air source heat pump units in different zones.

[0012] Furthermore, the air source heat pump unit is controlled to defrost based on the total defrost timing, and the defrost determination condition is: when the total defrost timing reaches or exceeds the set value of the standard defrost timing, the unit starts to defrost.

[0013] In a second aspect, an air source heat pump defrosting control system based on the cold and wet island effect is disclosed, comprising: A monitoring module is configured to: obtain parameters on the environment side and parameters on the air source heat pump unit side; The first calculation module is configured to: determine the cold and wet island effect intensity of each regional unit of the air source heat pump according to the environmental side parameters and the air source heat pump unit side parameters, and calculate the cold and wet island effect loss coefficient; The second calculation module is configured to: divide the air source heat pump array into zones based on the cold and wet island effect loss coefficient and record the defrost time of each zone of the array to calculate the total defrost timing; The control module is configured to control the air source heat pump unit to defrost based on the total defrost timing.

[0014] In a third aspect, an electronic device is disclosed, including a memory and a processor, and computer instructions stored in the memory and running on the processor, wherein when the computer instructions are run by the processor, the steps of the above-mentioned air source heat pump defrost control method based on the cold and moisture island effect are completed.

[0015] In a fourth aspect, a computer-readable storage medium is disclosed for storing computer instructions, which, when executed by a processor, complete the steps of the above-mentioned air source heat pump defrosting control method based on the cold and moisture island effect.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides an air source heat pump defrost control method based on the cold and moisture island effect. The intensity of the cold and moisture island effect is used as the characteristic parameter for frost judgment. A regional defrost control method for an air source heat pump array of "real-time judgment, regional normalization, and cumulative timing" is proposed. By real-time monitoring of the intensity of the cold and moisture island effect of the unit and dynamic regional division of the array, comprehensive and accurate defrosting is achieved, which significantly reduces the defrosting loss of the unit, improves the operating energy efficiency of the unit, and weakens the influence of the "cold and moisture island effect" of the air source heat pump array.

[0017] The present invention is suitable for large and medium-sized air source heat pump heating projects under complex and changeable climatic conditions, can improve the stability and reliability of air source heat pump heating systems in winter, and has strong applicability.

[0018] Advantages of additional aspects of the present invention will be given in part in the following description, and in part will become obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0020] Figure 1 This is a logic diagram of the air source heat pump defrosting control method based on the cold and wet island effect described in Example 1 of the present invention. DETAILED DESCRIPTION

[0021] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0022] It should be noted that the terms used herein are for describing specific embodiments only and are not intended to be limiting of exemplary embodiments according to the present invention.

[0023] In the absence of conflict, the embodiments of the present invention and the features of the embodiments may be combined with each other.

[0024] Embodiment 1 In one or more embodiments, a defrosting control method for an air source heat pump based on a cold and wet island effect is disclosed, comprising the following steps: Step S1: Obtaining parameters on the environment side and parameters on the air source heat pump unit side; The monitoring module collects the parameters of the environment and the air source heat pump unit module and transmits them to the control module. The environmental parameters include the ambient temperature T a , unit is ℃, ambient relative humidity RH a , unit is %, ambient atmospheric pressure P , in Pa; the air source heat pump unit side parameters include the air source heat pump unit coil temperature T w , in °C, unit inlet air temperature T in , unit is ℃, unit inlet relative humidity RH in , the unit is %.

[0025] Step S2: Determine the cold and wet island effect intensity of each area unit of the air source heat pump according to the environmental side parameters and the air source heat pump unit side parameters; Step S201: Setting the standard defrosting time of the air source heat pump unit t sd In this embodiment, preferably, the standard defrost time t sd Take 45 minutes.

[0026] Step S202: Real-time monitoring of environmental parameters and air source heat pump unit parameters to calculate the unit inlet wet bulb temperature T wbin , in °C, ambient wet bulb temperature T wba , the unit is ℃; the calculation formula is: (1) (2) Step S203: When the relative humidity of the environment RH a Relative humidity of air inlet to the unit RH in When formula (3) is satisfied, the unit defrosts according to the standard time t sd Directly carry out defrosting operation, otherwise further judgment will be made based on the real-time cold and wet island effect intensity of the unit; RH a ≥α%&RH a –RH in ≤γ% (3) in, α , c is a constant; & is AND logic; the meaning of formula (3) is the relative humidity RH a When the relative humidity is higher than a certain value α%, a Subtract the relative humidity RH of the air entering the unit in When the relative humidity is less than γ%, that is, when the relative humidity of the environment is high, the relative humidity of the unit inlet air is very close to the relative humidity of the environment, and the unit starts timing directly according to the standard defrosting time t sd Proceed directly to defrost operation.

[0027] Step S204: Calculate the cold and wet island effect intensity of each regional unit in real time. The calculation expression is as follows: Δ T CH =(2 Ta – T wba )–(2 T in – T wbin )(4) Among them, Δ T CH is the intensity of the cold and wet island effect, in ℃.

[0028] The intensity of the cold and wet island effect reflects the coupling relationship between temperature and relative humidity. Temperature and relative humidity jointly affect the intensity of the cold island and also the intensity of the wet island. It acts on the air source heat pump array unit and is more accurate than considering only temperature and humidity, which cannot fully summarize the intensity of the cold and wet island effect.

[0029] Step S3: Calculate the cold and wet island effect loss coefficient according to the cold and wet island effect intensity, and the expression is: , 0≤ e CHL ≤ x 3 (5) in, e CHL is the cold and wet island effect loss coefficient; A and B are constants measured by experiments; x 3 means the maximum value of the cold and wet island effect loss coefficient, which is calculated by experimental tests.

[0030] Step S4: based on the cold and wet island effect loss coefficient, the air source heat pump array is divided into zones and the defrosting time of each zone of the array is recorded, and the defrosting conditions are determined to control the unit to start defrosting.

[0031] Step S401: Based on the cold and wet island effect loss coefficient, the air source heat pump array is divided into three areas affected by the cold and wet island effect: a high risk area, a medium risk area, and a low risk area.

[0032] When 0≤ e CHL < x At 1:00, the unit is located in a low-risk area affected by the "cold and wet island effect" of the air source heat pump array in the area; x 1≤ e CHL < x At 2:00, the unit is located in a medium-risk area affected by the "cold and wet island effect" of the air source heat pump array; x 2≤ e CHL ≤ x 3, the unit is located in a high risk area affected by the "cold and wet island effect" of the air source heat pump array. In this embodiment, preferably, x1, x2, and x3 can be 0.1, 0.3, and 0.5.

[0033] By real-time monitoring of the intensity of the cold and wet island effect during unit operation, according to the cold and wet island effect loss coefficient and combining the above-mentioned area division standards, the unit's operating area in the air source heat pump array is determined.

[0034] Step S402: Set the defrosting time of the high-risk area, medium-risk area, and low-risk area affected by the cold and wet island effect of the air source heat pump array to t1, t2, and t3, respectively, in minutes (min). In this embodiment, preferably t 1. t 2. t 3 The possible values ​​are 45min, 90min, and 180min.

[0035] Step S403: Record the defrosting time of each zone of the array according to the operation area of ​​the air source heat pump array; When the unit is operating in the high risk area of ​​cold and wet island effect of air source heat pump array, the time starts from 0 and the running time t A Record; when the unit is operating in the medium risk area affected by the cold and wet island effect of the air source heat pump array, start timing from 0 and record its operating time t B Record; when the unit is in the low risk area of ​​the cold and wet island effect of the air source heat pump array, start timing from 0 and record its running time t C Make a record.

[0036] When the operating area of ​​the unit changes, the operating time of the first area starts from 0, and the operating time of this area is recorded and kept unchanged. After the area changes, the operating time of the second area starts from 0, and the operating time of this area is recorded. Finally, the operating time of the two areas is normalized and weighted and further accumulated.

[0037] Step S404: To accumulate the operating time of the unit in each area, the timing of each operating area of ​​the air source heat pump array is normalized: (6) (7) in, It is a standardized time measurement in minutes (min); X i ( i = A , B , C ) are the standardized coefficients for timing the three partitions respectively; t It is the set standard defrost time.

[0038] Step S405: accumulating the standardized timings of the air source heat pump units in each zone to calculate the total defrost timing: (8) in, t sum It is the total defrost timing for each zone of the unit.

[0039] Step S5: Determine whether the air source heat pump unit has reached the defrost condition based on the total defrost timing. When the defrost determination condition is reached, the unit starts to defrost.

[0040] The defrost judgment conditions are as follows: When the total defrost timer t sum Meet or exceed standard defrost timing t sd When the set value is reached, the unit starts to defrost.

[0041] After defrosting begins, when the unit's outdoor heat exchanger coil temperature T w The defrost exit temperature is reached or exceeded T sd When the set value ξ is reached, preferably ξ can be taken as 20℃, the unit exits defrosting and switches to heating mode to continue running.

[0042] Embodiment 2 In this embodiment, a defrosting control method for an air source heat pump based on the cold and wet island effect applied to a demonstration project of a central heating system of an air source heat pump array is disclosed, and the specific steps include: The demonstration project is located in a cold climate zone, with a winter air conditioning design outdoor air temperature of -7.7℃, a relative humidity of 61%, and a design heating days of 137 days. The project is a small heating station consisting of 44 air source heat pump units arranged in an array. There are 4 rows, with 11 ASHP units in each row installed closely, and the spacing between rows is 1.74m, with a total area of ​​202.8m2.

[0043] Step S1: Obtaining parameters on the environment side and parameters on the air source heat pump unit side; The monitoring module collects the parameters of the environment and the air source heat pump unit module and transmits them to the control module. The environmental parameters include the ambient temperature T a , unit is ℃, ambient relative humidity RH a , unit is %, ambient atmospheric pressure P , in Pa; the air source heat pump unit side parameters include the air source heat pump unit coil temperature T w , in °C, unit inlet air temperature T in , unit is ℃, unit inlet relative humidity RH in , the unit is %.

[0044] Step S2: Determine the cold and wet island effect intensity of each regional unit of the air source heat pump in the demonstration project according to the environmental side parameters and the air source heat pump unit side parameters; Step S201: Set the standard defrost time t sd Set to t=45min.

[0045] Step S202: Real-time monitoring of the air inlet temperature of the air source heat pump unit T in =-8.0℃, relative humidity of air inlet to the unit RH in =87.8%, ambient temperature T a =-3.7℃, relative humidity RH a =63%, ambient atmospheric pressure P =100124Pa.

[0046] Calculate the unit inlet wet bulb temperature T wbin =-8.43℃, ambient wet bulb temperature T wba =-5.48℃.

[0047] Step S203: At this time, the relative humidity of the environment RH a Relative humidity of air inlet to the unit RH in Not satisfied RH a ≥80%& RH a – RH in ≤5%, further judgment is required based on the real-time “cold and wet island effect” intensity of the unit.

[0048] Step S204: Calculate the cooling island strength Δ of the unit T CH =(2 T a – T wba )–(2 T in – T wbin )=5.74℃.

[0049] Step S3: Based on the cold and wet island effect loss coefficient model , real-time calculation of cold and wet island effect loss coefficient e CHL =0.34.

[0050] Step S4: based on the cold and wet island effect loss coefficient, the air source heat pump array is divided into zones and the defrosting time of each zone of the array is recorded, and the defrosting conditions are determined to control the unit to start defrosting.

[0051] Step S401: Combine the "cold and wet island effect" loss coefficient to divide the "cold and wet island effect" influence area of ​​the air source heat pump array. e CHL When <0.1, the unit is located in a low-risk area affected by the "cold and wet island effect" of the air source heat pump array; 0.1≤ e CHL <0.3, the unit is located in a medium risk area affected by the "cold and wet island effect" of the air source heat pump array; 0.3≤ e CHL When ≤0.5, the area where the unit is located is a high-risk area affected by the "cold and wet island effect" of the air source heat pump array.

[0052] Step S403: Determine whether the unit is in a high risk area affected by the "cold and wet island effect". t A Start timing from 0. t B , t C Keep the value unchanged at 0min. After 15min of operation in the high-risk area, t A =15min. The unit operation area changes and is in a stable operation in the medium risk area affected by the "cold and wet island effect". t B The time starts from 0, and the medium-risk area operates for 60 minutes. t A , t C Keep its value unchanged, that is t A =15min, t B =60min, t C =0min.

[0053] Step S404: The defrosting time of the high-risk area, medium-risk area, and low-risk area affected by the "cold and wet island effect" of the air source heat pump array is set to t 1=45min, t 2 = 90 min, t 3=180min. The defrosting time of the high-risk area and the medium-risk area affected by the “cold and wet island effect” of the air source heat pump array is t 1=45min and t2=90min, the timing of the two areas is normalized, and the standardized coefficients of the timing of the high-risk area and the medium-risk area affected by the "cold and humid island effect" are , ; Calculate standardized timing =15min, =30min, =0min.

[0054] Step S405: Calculate the total defrost timing by accumulating the standardized timing of each partition =45min.

[0055] Step S5: At this time, the total defrost timing t sum Reach standard defrost timing t sd After the defrosting starts, when the temperature of the outdoor heat exchanger coil of the unit T w The defrost exit temperature is reached or exceeded T sd When the set value is 20℃, the unit exits defrosting and switches to heating mode to continue running, and the cycle continues.

[0056] Embodiment 3 In one or more embodiments, an air source heat pump defrost control system based on the cold and wet island effect is disclosed, specifically comprising: A monitoring module is configured to: obtain parameters on the environment side and parameters on the air source heat pump unit side; The first calculation module is configured to: determine the cold and wet island effect intensity of each regional unit of the air source heat pump according to the environmental side parameters and the air source heat pump unit side parameters, and calculate the cold and wet island effect loss coefficient; The second calculation module is configured to: divide the air source heat pump array into zones based on the cold and wet island effect loss coefficient and record the defrost time of each zone of the array to calculate the total defrost timing; The control module is configured to control the air source heat pump unit to defrost based on the total defrost timing.

[0057] Embodiment 4 This embodiment provides an electronic device, including a memory and a processor, and computer instructions stored in the memory and running on the processor. When the computer instructions are run by the processor, the steps of the above-mentioned air source heat pump defrosting control method based on the cold and moisture island effect are completed.

[0058] Embodiment 5 This embodiment provides a computer-readable storage medium for storing computer instructions. When the computer instructions are executed by a processor, the steps of the above-mentioned air source heat pump defrosting control method based on the cold and moisture island effect are completed.

[0059] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure one A process or multiple processes and / or boxes Figure one A device that provides the functions specified in a block or multiple blocks.

[0060] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure one A process or multiple processes and / or boxes Figure one A function specified in one or more boxes.

[0061] These computer program instructions can also be loaded onto a computer or other programmable data processing device, and a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, so that the instructions executed on the computer or other programmable device provide for implementing the process. Figure one A process or multiple processes and / or boxes Figure one The steps for the functions specified in one or more boxes.

[0062] The description of each embodiment in the above embodiments has different emphases. For parts not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A defrosting control method for an air source heat pump based on the cold and wet island effect, characterized in that: include: Obtain environmental parameters and air source heat pump unit parameters; Determine the cold and wet island effect intensity of each area unit of the air source heat pump according to the parameters on the environmental side and the parameters on the air source heat pump unit side, and calculate the cold and wet island effect loss coefficient; Based on the cold and wet island effect loss coefficient, the air source heat pump array is divided into zones and the defrost time of each zone of the array is recorded to calculate the total defrost time. The air source heat pump unit is controlled to defrost based on the total defrost timing.

2. The air source heat pump defrosting control method based on the cold and wet island effect as claimed in claim 1, characterized in that: The environmental side parameters include ambient temperature, ambient relative humidity and ambient atmospheric pressure; the air source heat pump unit side parameters include air source heat pump unit coil temperature, unit inlet air temperature and unit inlet air relative humidity.

3. The air source heat pump defrosting control method based on the cold and wet island effect as claimed in claim 1, characterized in that: The calculation expression of the intensity of the cold and wet island effect is: D T CH =(2) T a – T wba )–(2 T in – T wbin ) Among them, Δ T CH is the intensity of the cold and wet island effect; T a is the ambient temperature; T wba is the ambient wet bulb temperature; T in is the unit inlet air temperature; T wbin It is the wet bulb temperature of the air inlet to the unit.

4. The air source heat pump defrosting control method based on the cold and wet island effect as claimed in claim 1, characterized in that: The calculation expression of the cold and wet island effect loss coefficient is: ，0≤ ε CHL ≤ x 3 in, ε CHL is the cold and wet island effect loss coefficient; A and B are constants; x 3 means the maximum value of the cold and wet island effect loss coefficient.

5. The air source heat pump defrosting control method based on the cold and wet island effect as claimed in claim 1, characterized in that: Partitioning the air source heat pump array based on the cold and wet island effect loss coefficient specifically includes: When the cold and wet island effect loss coefficient is greater than or equal to zero and less than the first preset value, the area where the air source heat pump array unit is located is a low risk area affected by the cold and wet island effect of the air source heat pump array; When the cold and wet island effect loss coefficient is greater than or equal to the first preset value and less than the second preset value, the area where the air source heat pump array unit is located is a medium risk area affected by the cold and wet island effect of the air source heat pump array; When the cold-humidity island effect loss coefficient is greater than or equal to the second preset value and less than or equal to the third preset value, the area where the air source heat pump array unit is located is a high-risk area affected by the cold-humidity island effect of the air source heat pump array.

6. The air source heat pump defrosting control method based on the cold and wet island effect as claimed in claim 1, characterized in that: The total defrost timing is calculated by adding up the standardized timings of the air source heat pump units in different zones.

7. The air source heat pump defrosting control method based on the cold and wet island effect as claimed in claim 1, characterized in that: The air source heat pump unit is controlled to defrost based on the total defrost timing, and the defrost judgment condition is: when the total defrost timing reaches or exceeds the set value of the standard defrost timing, the unit starts to defrost.

8. An air source heat pump defrosting control system based on the cold and wet island effect, characterized in that: include: A monitoring module is configured to: obtain parameters on the environment side and parameters on the air source heat pump unit side; The first calculation module is configured to: determine the cold and wet island effect intensity of each regional unit of the air source heat pump according to the environmental side parameters and the air source heat pump unit side parameters, and calculate the cold and wet island effect loss coefficient; The second calculation module is configured to: divide the air source heat pump array into zones based on the cold and wet island effect loss coefficient and record the defrost time of each zone of the array to calculate the total defrost timing; The control module is configured to control the air source heat pump unit to defrost based on the total defrost timing.

9. An electronic device, characterized in that: The invention comprises a memory and a processor and computer instructions stored in the memory and executed on the processor. When the computer instructions are executed by the processor, the defrosting control method of an air source heat pump based on the cold and wet island effect as described in any one of claims 1 to 7 is completed.

10. A computer-readable storage medium, characterized in that: Used to store computer instructions, which, when executed by a processor, complete the air source heat pump defrosting control method based on the cold and wet island effect as described in any one of claims 1 to 7.

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