Defrosting control method and device, heat exchange equipment and storage medium

Abstract

The invention discloses a defrosting control method, a defrosting control device, heat exchange equipment and a storage medium. The defrosting control method comprises the steps that the inlet temperature of an evaporator in the heat exchange equipment is detected; under the condition that the inlet temperature of the evaporator is smaller than the preset temperature, the heat exchange equipment is controlled to operate for a first preset duration in a heating mode and operate for a second preset duration in a defrosting mode; the current defrosting amount in the defrosting mode is recorded; and the first preset duration and the second preset duration are corrected according to the current defrosting amount. According to the defrosting control method, the defrosting heating duration and the defrosting duration can be revised according to the last defrosting water amount, redundant defrosting actions are reduced, and energy consumption waste is reduced while the defrosting effect is guaranteed.

Description

Technical Field

[0001] The present application relates to the field of heat pump control, and in particular to a defrost control method, a defrost control device, a heat exchange device and a storage medium. Background Art

[0002] When the air source heat pump is running in a low temperature environment, the surface of its outdoor evaporator is prone to frost. This is due to the white ice crystals formed by the condensation of water vapor in the air at low temperatures. The frost layer has poor thermal conductivity, which will hinder heat transfer, resulting in a decrease in the energy efficiency ratio of the heat pump system and a decrease in overall performance. There are two commonly used defrosting methods. The first is that when the running time reaches the cumulative time, the unit will enter the defrost mode. This method is prone to frost-free defrosting, resulting in energy waste and reduced heating comfort. The other is defrost control, which is to revise the defrost time and heating time by detecting the defrost time or the temperature drop rate of the fin coil. However, when there is an uneven frost problem on the fins, this method may result in misjudgment, resulting in the air source heat pump not defrosting for a long time. Summary of the invention

[0003] Embodiments of the present application provide a defrost control method, a defrost control device, a heat exchange device, and a non-volatile computer-readable storage medium.

[0004] The defrost control method provided in the embodiment of the present application includes:

[0005] detecting an inlet temperature of an evaporator in the heat exchange device;

[0006] When the inlet temperature of the evaporator is lower than a preset temperature, controlling the heat exchange device to operate in the heating mode for a first preset time and in the defrosting mode for a second preset time;

[0007] Recording the current defrost amount in the defrost mode; and

[0008] The first preset time length and the second preset time length are corrected according to the current defrost amount.

[0009] In some embodiments, the first preset time and the second preset time are corrected according to the current defrost amount, including:

[0010] Obtaining a first heating time, a first defrosting time, and a first defrosting amount obtained by the heat exchange device under a first environmental condition, and a second heating time, a second defrosting amount, and a second defrosting time obtained under a second environmental condition, wherein the first heating time is less than the second heating time, the first defrosting time is greater than the second defrosting time, and the first defrosting amount is greater than the second defrosting amount;

[0011] comparing the current defrost amount, the first defrost amount, and the second defrost amount;

[0012] When the current defrost amount is less than or equal to the second defrost amount, determining the first preset time according to the second heating time and determining the second preset time according to the second defrost time; or

[0013] When the current defrost amount is greater than or equal to the first defrost amount, the first preset time is determined according to the first heating time, and the second preset time is determined according to the first defrost time.

[0014] In some embodiments, the method further comprises: correcting the first preset time and the second preset time according to the current defrost amount;

[0015] When the current defrost amount is greater than the second defrost amount and less than the first defrost amount, determining the first preset time according to the first heating time, the second heating time, the first defrost amount, the second defrost amount and the current defrost amount; and

[0016] The second preset time is determined according to the first defrost time and the second defrost time, the first defrost amount, the second defrost amount and the current defrost amount.

[0017] In some embodiments, the calculation expression of the first preset duration includes:

[0018]

[0019] Wherein, T is the first preset duration, T min is the second heating time, Tmax is the first heating time, Q0 is the first defrost amount, Q1 is the second defrost amount, and Q is the current defrost amount.

[0020] In some embodiments, the calculation expression of the second preset duration includes:

[0021]

[0022] Among them, B is the second preset duration, B max is the first defrost duration, B min is the second defrost time, Q0 is the first defrost amount, Q1 is the second defrost amount, and Q is the current defrost amount.

[0023] In certain embodiments, the heat exchange device includes a water volume detector, and the defrost control method further includes:

[0024] Detecting the state of the water quantity detector;

[0025] When the water level detector is abnormal, the defrost mode is periodically operated.

[0026] In some embodiments, the water level detector includes at least one of a water level sensor, a flow sensor, or a water flow switch.

[0027] In some embodiments, the defrost control method further includes:

[0028] Detecting the ambient temperature of the heat exchange device;

[0029] When the ambient temperature is lower than the temperature threshold, the heating mode of the heat exchange device is turned on.

[0030] The defrost control device of the embodiment of the present application includes:

[0031] A detection module, used to detect the inlet temperature of the evaporator in the heat exchange device;

[0032] A control module, configured to control the heat exchange device to operate in the heating mode for a first preset time and in the defrosting mode for a second preset time when the inlet temperature of the evaporator is less than a preset temperature;

[0033] a recording module, used for recording the current defrosting amount in the defrosting mode; and

[0034] A correction module is used to correct the first preset time and the second preset time according to the current defrost amount.

[0035] The heat exchange device of the embodiment of the present application includes a processor and a memory, wherein the memory stores a computer program. When the computer program is executed by the processor, the processor implements the defrost control method.

[0036] The non-volatile computer-readable storage medium of the embodiment of the present application includes a computer program, and when the computer program is executed by a processor, the processor implements the defrost control method.

[0037] In the defrost control method, defrost control device, heat exchange equipment and storage medium of the implementation mode of the present application, by recording the current defrost water volume, and revising the heating time and defrost time of the heat exchange equipment in the heating mode for the next time according to the current defrost water volume, unnecessary defrosting actions are reduced and heating comfort is improved. In this way, energy waste is reduced while ensuring the defrost effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0039] Figure 1 is a flow chart of a defrost control method according to certain embodiments of the present application;

[0040] Figure 2 is a module schematic diagram of a defrost control device according to certain embodiments of the present application;

[0041] Figure 3 It is a schematic diagram of a scene of a heat exchange device in certain embodiments of the present application;

[0042] Figure 4 It is another schematic diagram of a heat exchange device in some embodiments of the present application;

[0043] Figure 5-8 It is a flow chart of a defrost control method according to certain embodiments of the present application. DETAILED DESCRIPTION

[0044] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the embodiments of the present invention, and cannot be understood as limiting the embodiments of the present invention.

[0045] See also Figure 1 , the embodiment of the present application provides a defrost control method, the defrost control method comprising:

[0046] 01: Detect the inlet temperature of the evaporator in the heat exchange equipment;

[0047] 02: When the inlet temperature of the evaporator is lower than the preset temperature, the heat exchange device is controlled to operate in the heating mode for a first preset time and in the defrosting mode for a second preset time;

[0048] 03: Record the current defrost amount in defrost mode; and

[0049] 04: Modify the first preset time and the second preset time according to the current defrost amount.

[0050] See also Figure 2 This embodiment further provides a defrost control device 10 , which includes a detection module 110 , a control module 120 , a recording module 130 and a correction module 140 .

[0051] Step 01 can be implemented by the detection module 110, step 02 can be implemented by the control module 120, step 03 can be implemented by the recording module 130, and step 04 can be implemented by the correction module 140. That is, the detection module 110 is used to detect the inlet temperature of the evaporator in the heat exchange device; the control module 120 is used to control the heat exchange device to run for a first preset time in the heating mode and a second preset time in the defrosting mode when the inlet temperature of the evaporator is less than a preset temperature; the recording module 130 is used to record the current defrosting amount in the defrosting mode; and the correction module 140 is used to correct the first preset time and the second preset time according to the current defrosting amount.

[0052] An embodiment of the present application also provides a heat exchange device, which includes a processor and a memory, wherein the memory stores a computer program. When the computer program is executed by the processor, the processor executes the above-mentioned defrost control method, that is, the processor can be used to detect the inlet temperature of the evaporator in the heat exchange device; and when the inlet temperature of the evaporator is less than the preset temperature, the heat exchange device is controlled to operate in the heating mode for a first preset time and in the defrost mode for a second preset time; the processor can also be used to record the current defrost amount in the defrost mode, and to correct the first preset time and the second preset time according to the current defrost amount.

[0053] In the defrost control method, defrost control device 10 and heat exchange equipment of the present application, the current defrost water volume obtained after the current defrost mode is operated is recorded, and the heating time of the next heat exchange equipment in the heating mode and the defrost time in the defrost mode are revised according to the current defrost water volume, thereby reducing unnecessary defrosting actions and improving heating comfort. In this way, energy waste is reduced while ensuring the defrost effect.

[0054] In some embodiments, the defrost control device 10 may be a part of a heat exchange device. In other words, the heat exchange device includes the defrost control device 10 .

[0055] In some embodiments, the defrost control device 10 may be a discrete component assembled in a certain manner to have the aforementioned functions, or a chip having the aforementioned functions in the form of an integrated circuit, or a computer software code segment that enables the computer to have the aforementioned functions when running on the computer.

[0056] In some embodiments, as hardware, the defrost control device 10 can be independent or installed as an additional peripheral component in the heat exchange device. The defrost control device 10 can also be integrated into the heat exchange device. For example, when the defrost control device 10 is a part of the heat exchange device, the defrost control device 10 can be integrated into the processor.

[0057] Specifically, the heat exchange device can be an air source heat pump air conditioner. Those skilled in the art can understand that an air source heat pump is a device that utilizes the reverse Carnot principle to convert low-temperature thermal energy in the air into high-temperature thermal energy by consuming electrical energy, etc., to achieve cooling or heating functions.

[0058] The heat exchange device may include an evaporator, a temperature sensor and a water level detector. The temperature sensor may be arranged at the inlet of the evaporator and may be used to detect the temperature at the inlet of the evaporator. The heat exchange device has multiple working modes, such as cooling mode, heating mode and defrosting mode. In cooling mode, the heat exchange device transfers cold air to the air through the surface of the evaporator. In heating mode, the heat exchange device transfers heat to the air through the surface of the evaporator. In defrosting mode, the frost on the surface of the evaporator can be removed.

[0059] It is understandable that in a low-temperature environment, water vapor in the air is prone to condense and frost on the surface of the evaporator. If the evaporator surface is frosted, it will affect the heat transfer from the evaporator surface to the air, that is, it will cause the capacity of the heat exchange equipment to decay, affecting the normal operation and high-efficiency performance of the heat exchange equipment in a low-temperature environment. Therefore, in a low-temperature environment that is prone to frost, the heat exchange equipment needs to turn on the defrost mode to remove the frost on the surface of the evaporator after running in the heating mode for a certain period of time. That is to say, in a low-temperature environment that is prone to frost, if the heating mode is turned on, the heating mode and the defrost mode will alternate cyclically, and the heat exchange equipment will run the defrost mode for the second preset time after running in the heating mode for the first preset time, and then run the heating mode again. In this way, the heating effect of the heat exchange equipment is guaranteed.

[0060] The preset temperature is used to determine whether the evaporator is frosted. When the temperature sensor detects that the temperature at the inlet of the evaporator is lower than the preset temperature, it indicates that the evaporator is prone to frosting. The preset temperature can be pre-stored in the memory of the heat exchange device and called by the processor when the processor detects the temperature through the temperature sensor. In this embodiment, the preset temperature can be 0-2 degrees Celsius. For example, when the preset temperature is 2 degrees Celsius, if the inlet temperature of the evaporator is lower than 2 degrees Celsius, the heat exchange device is controlled to operate in the heating mode for a first preset time and in the defrosting mode for a second preset time.

[0061] The defrost amount refers to the water volume or water flow obtained by frost liquefaction after the heat exchange equipment passes through the defrost mode. The higher the defrost amount, the thicker the frost on the heat exchange equipment, and the more serious the impact on the heat exchange equipment. It can be understood that the current defrost amount refers to the defrost amount recorded by the current heat exchange equipment in the defrost mode.

[0062] Furthermore, the heat exchange device may also include a water volume detector, which can be used to record the defrosting volume after the defrosting mode. The water volume detector can be a water level sensor, a flow sensor, or a water flow switch. The specific configuration is not limited and can be set according to the actual needs of the heat exchange device. For example, please combine Figure 3 In some examples, the heat exchange device may be provided with a defrost water tank and a water level sensor. The defrost water tank may collect defrost water. The water level sensor may be used to detect the amount of water in the defrost water tank to obtain the defrost amount. For another example, please combine Figure 4 In some examples, the heat exchange device may include a defrost drainage pipe, which is provided with a flow sensor or a water flow switch. The defrost amount can be obtained by detecting the water flow through the defrost drainage pipe by the flow sensor, or by recording the length of time the water flows after turning on the water flow switch.

[0063] The first preset time and the second preset time are both preset time periods. The first preset time is the duration of the heat exchange device running in the heating mode under low temperature environment, and the second preset time is the duration of the heat exchange device running in the defrosting mode under low temperature environment. The first preset time and the second preset time of each time can be determined according to the defrosting amount recorded last time. In some examples, the size of the first preset time of each time can be inversely proportional to the defrosting amount of the last time, and the size of the second preset time of each time can be proportional to the defrosting amount of the last time, that is, the higher the defrosting amount, the shorter the first preset time and the longer the second preset time, and the lower the defrosting amount, the longer the first preset time and the shorter the second preset time. In this way, the frost-free defrosting phenomenon can be avoided while ensuring the capacity of the heat exchange device.

[0064] Please combine Figure 5 In some embodiments, 04 includes:

[0065] 041: Obtain a first heating time, a first defrosting time, and a first defrosting amount obtained by the heat exchange device under a first environmental condition, and a second heating time, a second defrosting amount, and a second defrosting time obtained under a second environmental condition, wherein the first heating time is less than the second heating time, the first defrosting time is greater than the second defrosting time, and the first defrosting amount is greater than the second defrosting amount;

[0066] 042: Compare the current defrost amount, the first defrost amount and the second defrost amount;

[0067] 043: when the current defrost amount is less than or equal to the second defrost amount, determining the first preset time according to the second heating time and determining the second preset time according to the second defrost time; or

[0068] 044: When the current defrost amount is greater than or equal to the first defrost amount, a first preset time is determined according to the first heating time, and a second preset time is determined according to the first defrost time.

[0069] Please further combine Figure 2 In some embodiments, 041-044 can be implemented by the correction module 140, or in other words, the correction module 140 can be used to obtain the first heating time, the first defrost time and the first defrost amount obtained by the heat exchange device under the first environmental condition and the second heating time, the second defrost amount and the second defrost time obtained under the second environmental condition, the first heating time is less than the second heating time, the first defrost time is greater than the second defrost time, and the first defrost amount is greater than the second defrost amount; and compare the current defrost amount, the first defrost amount and the second defrost amount; the correction module 140 can also be used to determine the first preset time according to the second heating time and determine the second preset time according to the second defrost time when the current defrost amount is less than or equal to the second defrost amount; or determine the first preset time according to the first heating time and determine the second preset time according to the first defrost time when the current defrost amount is greater than or equal to the first defrost amount.

[0070] In certain embodiments, the processor can be used to obtain a first heating time, a first defrost time, and a first defrost amount obtained by the heat exchange device under a first environmental condition, and a second heating time, a second defrost amount, and a second defrost time obtained under a second environmental condition, the first heating time being less than the second heating time, the first defrost time being greater than the second defrost time, and the first defrost amount being greater than the second defrost amount; and compare the current defrost amount, the first defrost amount, and the second defrost amount; the processor can also be used to determine a first preset time according to the second heating time and determine a second preset time according to the second defrost time when the current defrost amount is less than or equal to the second defrost amount; or determine a first preset time according to the first heating time and determine a second preset time according to the first defrost time when the current defrost amount is greater than or equal to the first defrost amount.

[0071] It should be noted that the first environmental condition is a condition of low temperature and high humidity (dry-bulb temperature can be 2 / 2 degrees Celsius), and the second environmental condition is a condition of low temperature and low humidity (the highest humidity at which the capacity of the heat exchange equipment does not decay). That is, under the first environmental condition, the capacity decay of the heat exchange equipment due to frost is the highest, and under the second environmental condition, the capacity decay of the heat exchange equipment due to frost is the lowest.

[0072] The first heating time is the time when the capacity of the heat exchange device is reduced by 50% or the low pressure is reduced to the lower limit value allowed by the compressor of the heat exchange device when the heat exchange device is running in the heating mode under the first environmental condition. The second heating time is the longest time for the heat exchange device to run in the heating mode under the second environmental condition without continuous operation capacity reduction. The first heating time can be 40-60 minutes, and the second heating time can be 120-150 minutes. The first defrost time is the longest time for complete defrosting when the heat exchange device is running in the defrost mode under the first environmental condition. The first defrost time can be 8-12 minutes, and the second defrost time is the shortest time for running the defrost mode under the second environmental condition. The second defrost time can be 30-120 seconds. For example, in some examples, the first heating time can be 45 minutes, the second heating time can be 120 minutes, the first defrost time can be 10 minutes, and the second defrost time can be 1 minute.

[0073] When the current defrost amount is less than or equal to the second defrost amount, the second heating time is directly used as the first preset time, and the second defrost time is used as the second preset time; that is:

[0074] Q≤Q 1 , T = T 1， B=B 1

[0075] Among them, Q is the current defrost amount, Q 1 is the second defrost amount, T is the first preset time, T 1 is the second heating time, B is the second preset time, B 1 It is the second defrost time.

[0076] When the current defrost amount is greater than or equal to the first defrost amount, the first heating time is directly used as the first preset time and the first defrost time is used as the second preset time. That is:

[0077] Q ≥ Q 0 , T = T 0 , B=B 0

[0078] Q is the current defrost amount, Q 0 is the first defrost amount, T is the first preset time, T 0 is the first heating duration, B is the second preset duration, and B 0 This is the first defrost duration.

[0079] Please combine Figure 6 In some embodiments, 04 further includes:

[0080] 045: when the current defrost amount is greater than the second defrost amount and less than the first defrost amount, determining the first preset time according to the first heating time, the second heating time, the first defrost amount, the second defrost amount and the current defrost amount;

[0081] 046: Determine the second preset time according to the first defrost time and the second defrost time, the first defrost amount, the second defrost amount and the current defrost amount.

[0082] In some embodiments, 045-046 can be implemented by the correction module 140, or in other words, the correction module 140 can be used to determine the first preset time according to the first heating time, the second heating time, the first defrost amount, the second defrost amount and the current defrost amount when the current defrost amount is greater than the second defrost amount and less than the first defrost amount; and to determine the second preset time according to the first defrost time and the second defrost time, the first defrost amount, the second defrost amount and the current defrost amount.

[0083] In certain embodiments, the processor can be used to determine a first preset time according to the first heating time, the second heating time, the first defrost amount, the second defrost amount and the current defrost amount when the current defrost amount is greater than the second defrost amount and less than the first defrost amount; and to determine a second preset time according to the first defrost time and the second defrost time, the first defrost amount, the second defrost amount and the current defrost amount.

[0084] The calculation expression of the first preset duration includes:

[0085]

[0086] Wherein, T is the first preset duration, T 0 is the first heating time, T 1 is the second heating time, Q is the current defrosting amount, Q 0 is the first defrost amount, Q 1 This is the second defrost amount.

[0087] The calculation expression of the second preset duration includes:

[0088]

[0089] Among them, B is the second preset duration, B 0 is the first defrost duration, B 1 is the second defrost time, Q is the current defrost amount, Q 0 is the first defrost amount, Q 1 This is the second defrost amount.

[0090] See also Figure 7 In some embodiments, the defrost control method further comprises:

[0091] 05. Check the status of the water detector;

[0092] 06. In case of abnormality in the water level detector, the defrost mode is operated regularly.

[0093] In some embodiments, 05 can be implemented by the detection module 110, and 06 can be implemented by the control module 120. In other words, the detection module 110 can be used to detect the state of the water level detector, and the control module 120 can be used to timedly run the defrost mode when the water level detector is abnormal.

[0094] In some embodiments, the processor can be used to detect the state of the water level detector; and in the event that the water level detector is abnormal, the defrost mode is periodically operated.

[0095] In this way, the capacity decline of the heat exchange equipment due to frost on the heat exchange equipment in the event of a water level detector failure is avoided, thereby ensuring the heat exchange efficiency of the heat exchange equipment in the event of a water level detector failure.

[0096] See also Figure 8 In some embodiments, the defrost control method further comprises:

[0097] 001: Detect the ambient temperature of the heat exchange equipment;

[0098] 002: When the ambient temperature is lower than the temperature threshold, the heating mode of the heat exchange equipment is turned on.

[0099] In some embodiments, 001 can be implemented by the detection module 110, and 002 can be implemented by the control module 120. In other words, the detection module 110 can also be used to detect the ambient temperature of the heat exchange device, and the control module 120 can be used to start the heating mode of the heat exchange device when the ambient temperature is lower than the temperature threshold.

[0100] In some embodiments, the processor may be configured to detect the ambient temperature of the heat exchange device; and when the ambient temperature is less than a temperature threshold, start a heating mode of the heat exchange device.

[0101] The temperature threshold can be set by the user, and the specific number is not limited. For example, the temperature threshold can be 6 degrees, 7 degrees, 8 degrees, 10 degrees, 12 degrees or 15 degrees or even more degrees.

[0102] In this way, the heating mode is automatically turned on when the ambient temperature is low, without the user having to actively turn it on, thereby improving the user experience.

[0103] In the description of this specification, the description with reference to the terms "one embodiment", "certain embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0104] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

[0105] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A defrost control method for heat exchange equipment, characterized in that: The defrost control method comprises: Detecting the inlet temperature of the evaporator in the heat exchange device; When the inlet temperature of the evaporator is lower than a preset temperature, controlling the heat exchange device to operate in a heating mode for a first preset time and in a defrosting mode for a second preset time; Recording the current defrost amount in the defrost mode; and The first preset time length and the second preset time length are corrected according to the current defrost amount.

2. The defrosting control method according to claim 1, characterized in that: Correcting the first preset time and the second preset time according to the current defrost amount includes: Obtaining a first heating time, a first defrosting time, and a first defrosting amount obtained by the heat exchange device under a first environmental condition, and a second heating time, a second defrosting amount, and a second defrosting time obtained under a second environmental condition, wherein the first heating time is less than the second heating time, the first defrosting time is greater than the second defrosting time, and the first defrosting amount is greater than the second defrosting amount; comparing the current defrost amount, the first defrost amount, and the second defrost amount; When the current defrost amount is less than or equal to the second defrost amount, determining the first preset time according to the second heating time and determining the second preset time according to the second defrost time; or When the current defrost amount is greater than or equal to the first defrost amount, the first preset time is determined according to the first heating time, and the second preset time is determined according to the first defrost time.

3. The defrosting control method according to claim 2, characterized in that: The method further comprises: correcting the first preset time length and the second preset time length according to the current defrosting amount; When the current defrost amount is greater than the second defrost amount and less than the first defrost amount, determining the first preset time according to the first heating time, the second heating time, the first defrost amount, the second defrost amount and the current defrost amount; and The second preset time is determined according to the first defrost time and the second defrost time, the first defrost amount, the second defrost amount and the current defrost amount.

4. The defrosting control method according to claim 3, characterized in that: The calculation expression of the first preset duration includes: Among them, T is the first preset duration, T1 is the second heating duration, T0 is the first heating duration, Q0 is the first defrost amount, Q1 is the second defrost amount, and Q is the current defrost amount.

5. The defrosting control method according to claim 3, characterized in that: The calculation expression of the second preset time length includes: Among them, B is the second preset duration, B0 is the first defrost duration, B1 is the second defrost duration, Q0 is the first defrost amount, Q1 is the second defrost amount, and Q is the current defrost amount.

6. The defrosting control method according to claim 1, characterized in that: The heat exchange device includes a water volume detector, and the defrost control method further includes: Detecting the state of the water quantity detector; When the water level detector is abnormal, the defrost mode is periodically operated.

7. The defrosting control method according to claim 6, characterized in that: The water volume detector includes at least one of a water level sensor, a flow sensor or a water flow switch.

8. The defrosting control method according to claim 1, characterized in that: The defrost control method further comprises: Detecting the ambient temperature of the heat exchange device; When the ambient temperature is lower than the temperature threshold, the heating mode of the heat exchange device is turned on.

9. A defrost control device for heat exchange equipment, characterized in that: The defrost control device comprises: A detection module, used to detect the inlet temperature of the evaporator in the heat exchange device; A control module, configured to control the heat exchange device to operate in a heating mode for a first preset time and in a defrosting mode for a second preset time when the inlet temperature of the evaporator is less than a preset temperature; a recording module, used for recording the current defrosting amount in the defrosting mode; and A correction module is used to correct the first preset time and the second preset time according to the current defrost amount.

10. A heat exchange device, characterized in that: The invention comprises a processor and a memory, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor implements the defrost control method according to any one of claims 1 to 8.

11. A non-volatile computer-readable storage medium, characterized in that: The invention comprises a computer program, and when the computer program is executed by a processor, the processor is enabled to implement the defrost control method according to any one of claims 1 to 8.

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