A defrosting control device, a defrosting control method, and a temperature regulation system

Abstract

The application discloses a defrosting control device, a defrosting control method and a temperature regulation system. The defrosting control device comprises a collection module, an edge calculation module, a defrosting module and a control module. The defrosting module comprises a plurality of defrosting units arranged on a heat exchange unit. The collection module is used to collect the air pressure difference of the heat exchange unit and the temperature field distribution information of the set surface of the heat exchange unit. The edge calculation module is used to determine the critical defrosting threshold and the frost layer thickness distribution information of the set surface according to the air pressure difference and the temperature field distribution information. The control module is used to determine the target defrosting area according to the frost layer thickness distribution information and the critical defrosting threshold, and control the defrosting unit corresponding to the target defrosting area to defrost. The application provides a defrosting control device, a defrosting control method and a temperature regulation system, which can reduce the defrosting energy consumption, ensure the continuous operation of the temperature regulation system where the heat exchange unit is located during defrosting, prolong the service life of the temperature regulation system and increase the application scenarios of the temperature regulation system.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of defrosting, in particular to a defrosting control device, a defrosting control method and a temperature regulation system. BACKGROUND

[0002] When the air source heat pump is heating, the evaporator absorbs heat from the external air. When the ambient temperature is low and the humidity is high, frost may form on the surface of the evaporator, which will reduce the heat exchange efficiency, so defrosting is needed.

[0003] Currently, defrosting is triggered by temperature sensors or time thresholds, which can easily cause false triggering (defrosting without frost) or delayed defrosting, resulting in energy waste. Moreover, reverse cycle mode is often used during defrosting, which requires stopping the air source heat pump heating operation, resulting in large indoor temperature fluctuations, poor user experience, and frequent start-stop of the compressor caused by reverse cycle mode, which shortens the service life of the equipment. SUMMARY

[0004] The present application provides a defrosting control device, a defrosting control method and a temperature regulation system, which can reduce defrosting energy consumption, ensure that the temperature regulation system where the heat exchange unit is located continues to work during defrosting, and prolong the service life of the temperature regulation system and increase its application scenarios.

[0005] According to an aspect of the present application, a defrosting control device is provided, which comprises a collection module, an edge computing module, a defrosting module and a control module;

[0006] The defrosting module comprises a plurality of defrosting units arranged on the heat exchange unit;

[0007] The collection module is configured to collect the wind pressure difference of the heat exchange unit and the temperature field distribution information of the set surface of the heat exchange unit;

[0008] The edge computing module is configured to determine a critical defrosting threshold and the frost layer thickness distribution information of the set surface according to the wind pressure difference and the temperature field distribution information; wherein the critical defrosting threshold comprises a thickness threshold, and the thickness threshold is greater than 0;

[0009] The control module is configured to determine a target defrosting area according to the frost layer thickness distribution information and the critical defrosting threshold, and control the defrosting unit corresponding to the target defrosting area to defrost, wherein the frost layer thickness of the target defrosting area is greater than or equal to the thickness threshold.

[0010] Optionally, the collection module is further configured to collect the ambient humidity where the heat exchange unit is located;

[0011] The edge computing module is further configured to determine the frost formation rate of the frost layer on the heat exchange unit according to the wind pressure difference, the temperature field distribution information and the ambient humidity.

[0012] The control module is further configured to determine the working power of the defrosting unit corresponding to the target defrosting area according to the frost layer frosting rate.

[0013] Optionally, the edge computing module is specifically configured to determine the critical defrosting threshold, actual wind resistance rising rate, and frost layer thickness distribution information of the set surface according to the wind pressure difference, the temperature field distribution information, and the environmental humidity; wherein, the critical defrosting threshold further includes a wind resistance rising rate threshold.

[0014] The control module is specifically configured to determine the target defrosting area according to the frost layer thickness distribution information and the thickness threshold, and control the defrosting unit corresponding to the target defrosting area to defrost when the actual wind resistance rising rate is greater than or equal to the wind resistance rising rate threshold.

[0015] Optionally, the control module is further configured to control the temperature regulation system in which the heat exchange unit is located to switch to a reverse circulation mode when the area of the target defrosting area is greater than or equal to a set area threshold.

[0016] Optionally, the control module is further configured to control the frost layer of the heat exchange sub-unit with the thickest frost layer to be the target defrosting area when the heat exchange unit includes n heat exchange sub-units, and control the temperature regulation system in which the heat exchange sub-unit with the thickest frost layer is located to switch to a reverse circulation mode, while ensuring that at least one temperature regulation system in which the heat exchange sub-unit is located is normally working.

[0017] Optionally, the plurality of defrosting units in the defrosting module are arranged in an array on the surface of the heat exchange unit.

[0018] The defrosting unit includes an electric heating wire.

[0019] The area of the defrosting unit is less than or equal to a set threshold.

[0020] Optionally, the acquisition module includes a thermal imaging unit and a differential pressure detection unit.

[0021] The thermal imaging unit is arranged on the windward side of the heat exchange unit, and the thermal imaging unit is configured to acquire the temperature field distribution information of the set surface of the heat exchange unit.

[0022] The differential pressure detection unit is arranged between the air inlet of the heat exchange unit and the air outlet of the heat exchange unit, and the differential pressure detection unit is configured to acquire the wind pressure difference of the heat exchange unit.

[0023] Optionally, the thermal imaging unit includes an infrared thermal imaging sensor, and the infrared thermal imaging sensor is configured to acquire the temperature field distribution information of the set surface of the heat exchange unit.

[0024] The differential pressure detection unit comprises a differential pressure sensor configured to collect the air pressure difference of the heat exchange unit.

[0025] According to another aspect of the present application, a defrosting control method is provided, which is applied to the defrosting control device provided in any embodiment of the present application.

[0026] The defrosting control method comprises:

[0027] The collection module collects the air pressure difference of the heat exchange unit and temperature field distribution information of a set surface of the heat exchange unit.

[0028] The edge computing module determines a critical defrosting threshold and frost layer thickness distribution information of the set surface according to the air pressure difference and the temperature field distribution information, wherein the critical defrosting threshold comprises a thickness threshold, and the thickness threshold is greater than 0.

[0029] The control module determines a target defrosting area according to the frost layer thickness distribution information and the critical defrosting threshold, and controls the defrosting unit corresponding to the target defrosting area to defrost, wherein the frost layer thickness of the target defrosting area is all greater than or equal to the thickness threshold.

[0030] According to another aspect of the present application, a temperature regulation system is provided, which comprises the defrosting control device provided in any embodiment of the present application.

[0031] The embodiment of the present application provides a defrosting control device, an edge computing module in the defrosting control device is used for determining a critical defrosting threshold and frost layer thickness distribution information of a heat exchange unit according to wind pressure difference and temperature field distribution information collected by a collection module, a control module is used for determining a target defrosting area according to the critical defrosting threshold and the frost layer thickness distribution information, and the frost layer thickness in the target defrosting area is greater than or equal to a thickness threshold in the critical defrosting threshold, and the thickness threshold is greater than 0, so that it is ensured that the target defrosting area does not include a frost-free area, and the control module is further used for controlling a defrosting unit corresponding to the target defrosting area to defrost to remove the frost layer in the target defrosting area, so that it is ensured that the heat exchange unit can work normally. The defrosting control device provided by the embodiment of the present application is provided with a defrosting module, and defrosting is not needed by stopping running of a temperature regulation system in which the heat exchange unit is located, so that the number of start and stop of a compressor can be reduced, and the service life of the compressor is prolonged. The defrosting module can defrost the heat exchange unit in time, so that the heat exchange unit can work normally in a variety of environments, and the temperature regulation system in which the heat exchange unit is located can work normally in a variety of environments, in addition, the control module controls the defrosting unit in the defrosting module to defrost only the target defrosting area, local partial area defrosting is realized, and the defrosting module is prevented from working due to the defrosting unit corresponding to the frost-free area. The defrosting control device provided by the embodiment of the present application can reduce defrosting energy consumption, ensure that the temperature regulation system in which the heat exchange unit is located works continuously during defrosting, prolong the service life of the temperature regulation system, and increase the application scenarios of the temperature regulation system.

[0032] It should be understood that the content described in this part is not intended to identify key or important features of the embodiments of the present application, nor is it used to limit the scope of the present application. Other features of the present application will become apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0034] Figure 1 is a structural schematic diagram of a defrosting control device according to an embodiment of the present application;

[0035] Figure 2 is a front structural schematic diagram of a defrosting control device according to an embodiment of the present application applied to a heat exchange unit;

[0036] Figure 3 is a side structural schematic diagram of a defrosting control device according to an embodiment of the present application applied to a heat exchange unit;

[0037] Figure 4 is a flowchart of a defrosting control method according to an embodiment of the present application. DETAILED DESCRIPTION

[0038] In order to make the personnel in the art better understand the present application scheme, the technical scheme in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the protection scope of the present application.

[0039] It should be noted that the terms "first", "second", and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to only those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0040] Figure 1 is a structural schematic diagram of a defrosting control device according to an embodiment of the present application, referring to Figure 1 The defrosting control device provided in the embodiment includes a collection module 110, an edge computing module 120, a control module 130 and a defrosting module 140. The defrosting module 140 includes a plurality of defrosting units 141 arranged on a heat exchange unit. The collection module 110 is configured to collect a wind pressure difference of the heat exchange unit and temperature field distribution information of a set surface of the heat exchange unit. The edge computing module 120 is configured to determine a critical defrosting threshold and frost layer thickness distribution information of the set surface according to the wind pressure difference and the temperature field distribution information. The critical defrosting threshold includes a thickness threshold, and the thickness threshold is greater than 0. The control module 130 is configured to determine a target defrosting area according to the frost layer thickness distribution information and the critical defrosting threshold, and control the defrosting unit 141 corresponding to the target defrosting area to defrost, wherein the frost layer thickness of the target defrosting area is all greater than or equal to the thickness threshold.

[0041] Specifically, the heat exchange unit can be an evaporator in a temperature regulation system, and the heat exchange unit can also include multiple evaporators in multiple temperature regulation systems, i.e., the heat exchange unit includes multiple evaporators. The temperature regulation system can be used to adjust the temperature in a room, a box, etc. The temperature regulation system can be an air source heat pump, an air conditioner, or a multi-connected system, which refers to multiple temperature regulation systems, and the multi-connected system can include multiple evaporators.

[0042] The wind pressure difference of the heat exchange unit refers to the difference between the wind pressure at the inlet and the wind pressure at the outlet of the heat exchange unit. The thickening of the frost layer on the surface of the heat exchange unit will affect the change of the wind pressure difference, and the thickening of the frost layer will cause the wind pressure difference to rise. Therefore, the thickness of the frost layer can be determined according to the wind pressure difference. The set surface of the heat exchange unit can be the surface of the windward side of the heat exchange unit, or the surface of the windward side and the surface adjacent to the windward side, or all the outer surfaces of the heat exchange unit. The temperature field distribution information can include the temperature of each region of the set surface.

[0043] The acquisition module 110 can acquire the wind pressure difference and the temperature field distribution information in real time, or can acquire the wind pressure difference and the temperature field distribution information every set time length, which can be 10s, 20s, 30s, etc. The acquisition module 110 is connected with the edge computing module 120, and the edge computing module 120 is connected with the control module 130. The acquisition module 110 can send the acquired wind pressure difference and temperature field distribution information to the edge computing module 120. The edge computing module 120 determines the critical defrosting threshold and the frost layer thickness distribution information according to the wind pressure difference and the temperature field distribution information sent by the acquisition module 110, and can send the determined critical defrosting threshold and the frost layer thickness distribution information to the control module 130. The edge computing module 120 can determine the critical defrosting threshold and the frost layer thickness distribution information once every time the wind pressure difference and the temperature field distribution information sent by the acquisition module 110 are received, and send the determined critical defrosting threshold and the frost layer thickness distribution information to the control module 130. The control module 130 can determine the target defrosting area according to the newly sent critical defrosting threshold and the frost layer thickness distribution information, so as to avoid that the previous target defrosting area is defrosted by the defrosting unit 141 when there is no frost, reduce invalid defrosting, and reduce energy consumption.

[0044] The edge computing module 120 can store the wind pressure difference and temperature field distribution information sent by the acquisition module 110. The edge computing module 120 can determine the frost layer position according to the temperature field distribution information. For example, a low-temperature region can refer to a region with a frost layer. After receiving the wind pressure difference and temperature field distribution information, the edge computing module 120 can determine the frost layer thickness of each region of the set surface through a pre-trained frost layer thickness prediction model, thereby generating frost layer thickness distribution information. The frost layer thickness distribution information includes the frost layer thickness of each region of the set surface. The frost layer thickness distribution information can be a frost layer thickness distribution map. After determining the frost layer thickness of each region, the edge computing module 120 can also determine the thickness threshold in the critical defrosting threshold. For example, the thickness threshold can be 3 mm. The frost layer thickness in the target defrosting region is greater than or equal to the thickness threshold. Therefore, the thickness threshold can affect the area of the target defrosting region. By setting a reasonable thickness threshold, the effect of local defrosting can be achieved.

[0045] The control module 130 is connected with each defrosting unit 141. The control module 130 can individually control the working state of each defrosting unit 141. The working states of the defrosting units 141 can be different. For example, the control module 130 can control a part of the defrosting units 141 to defrost, and can also control another part of the defrosting units 141 to be inactive, i.e., not to defrost. A plurality of defrosting units 141 can be arranged on one surface or multiple surfaces of the heat exchange unit. The defrosting unit 141 can include a heating wire.

[0046] The control module 130 can determine the region that needs to be defrosted according to the frost layer thickness distribution information and the thickness threshold, i.e., determine the target defrosting region. The control module 130 can regard the region with a frost layer thickness greater than or equal to the thickness threshold as the target defrosting region. The frost layer thickness in the target defrosting region is greater than or equal to the thickness threshold. Therefore, the target defrosting region does not include a region without a frost layer. Therefore, the control module 130 does not need to control the defrosting unit 141 corresponding to the region without a frost layer to defrost. Only the region that needs to be defrosted is defrosted, thereby achieving zoned defrosting, avoiding invalid defrosting, and reducing the power consumption of the defrosting module 140. The target defrosting region can be a region with the thickest frost layer, or can be all regions with a frost layer. When the target defrosting region is large, the target defrosting region can correspond to a plurality of defrosting units 141. The plurality of defrosting units 141 corresponding to the target defrosting region refer to the defrosting units 141 in the defrosting module 140 that are relatively close to the target defrosting region. In this way, the defrosting rate can be accelerated. In the present embodiment, the control module 130 controls the defrosting unit 141 to defrost, without stopping the temperature control system in which the heat exchange unit is located for defrosting, thereby avoiding the life loss caused by frequent start-stop of the compressor.

[0047] If the heat exchange unit is not defrosted in time, the heat exchange unit cannot work in high humidity (RH>80%) and low temperature (-15℃ or below), and the temperature regulation system in which the heat exchange unit is located cannot defrost through the reverse cycle mode. The defrosting module 140 is provided in the embodiment, the defrosting unit 141 in the defrosting module 140 can be controlled to defrost in time, and defrosting does not need to be performed through the temperature regulation system, so that the temperature regulation system in which the heat exchange unit is located can still work in harsh environments such as high humidity and low temperature, and the application scenarios of the temperature regulation system are increased.

[0048] The defrosting control device provided in the embodiment includes an edge computing module, a collection module, and a control module. The edge computing module is configured to determine a critical defrosting threshold and frost layer thickness distribution information of the heat exchange unit according to wind pressure difference and temperature field distribution information collected by the collection module. The control module is configured to determine a target defrosting area according to the critical defrosting threshold and the frost layer thickness distribution information, and ensure that the frost layer thickness in the target defrosting area is greater than or equal to a thickness threshold in the critical defrosting threshold, and the thickness threshold is greater than 0, so as to ensure that the target defrosting area does not include a frost-free area. The control module is further configured to control a defrosting unit corresponding to the target defrosting area to defrost the frost layer in the target defrosting area, so as to ensure that the heat exchange unit can work normally. The defrosting control device provided in the embodiment is provided with a defrosting module, and defrosting does not need to be performed by stopping the operation of the temperature regulation system in which the heat exchange unit is located, so that the number of starts and stops of the compressor can be reduced, and the service life of the compressor is prolonged. The defrosting module can defrost the heat exchange unit in time, so that the heat exchange unit cannot work in harsh environments such as high humidity and low temperature due to too thick frost layer, and the temperature regulation system in which the heat exchange unit is located can work normally in various environments. In addition, the control module controls the defrosting unit in the defrosting module to defrost only the target defrosting area, so that local partial area defrosting is realized, and the defrosting module is prevented from working due to the work of the defrosting unit corresponding to the frost-free area caused by overall defrosting. In summary, the defrosting control device provided in the embodiment can reduce defrosting energy consumption, ensure that the temperature regulation system in which the heat exchange unit is located works continuously during defrosting, prolong the service life of the temperature regulation system, and increase the application scenarios of the temperature regulation system.

[0049] Optionally, the collection module is further configured to collect environmental humidity in which the heat exchange unit is located; the edge computing module is further configured to determine a frost layer formation rate on the heat exchange unit according to the wind pressure difference, the temperature field distribution information, and the environmental humidity; and the control module is further configured to determine a working power of the defrosting unit corresponding to the target defrosting area according to the frost layer formation rate.

[0050] Specifically, when the environmental humidity is large, the frost layer frosting rate is generally large, the wind pressure difference and the temperature of the surface of the heat exchange unit also affect the frost layer frosting rate. For example, when the surface temperature of the frost layer of the heat exchange unit is low, the frost layer frosting rate is generally fast, and the larger the wind pressure difference, the faster the frost layer frosting rate. The edge computing module is configured to determine the frost layer frosting rate on the heat exchange unit according to the wind pressure difference, the temperature field distribution information and the environmental humidity, so as to improve the accuracy of the determined frost layer frosting rate.

[0051] The greater the frost layer frosting rate, the thicker the frost layer will be, and therefore, timely and fast defrosting is required. The control module determines the working power of the defrosting unit according to the frost layer frosting rate, the greater the working power, the more heat the defrosting unit generates, and the faster the defrosting rate of the defrosting unit. For example, when the frost layer frosting rate is small, the control module can control the defrosting unit to defrost at a small working power, thereby reducing energy consumption, and when the frost layer frosting rate is large, the control module can control the defrosting unit to defrost at a large working power, thereby accelerating the defrosting rate and avoiding that the heat exchange unit cannot work normally due to the over-thick frost layer.

[0052] Optionally, the edge computing module is specifically configured to determine the critical defrosting threshold, the actual wind resistance rising rate and the frost layer thickness distribution information of the set surface according to the wind pressure difference, the temperature field distribution information and the environmental humidity, wherein the critical defrosting threshold further includes a wind resistance rising rate threshold; and the control module is specifically configured to determine the target defrosting area according to the frost layer thickness distribution information and the thickness threshold, and control the defrosting unit corresponding to the target defrosting area to defrost when the actual wind resistance rising rate is greater than or equal to the wind resistance rising rate threshold.

[0053] Specifically, the critical defrosting threshold determined by the edge computing module in this embodiment includes a thickness threshold and a wind resistance rising rate threshold. When the frost layer thickness of each region in the frost layer thickness distribution information is small but the actual wind resistance rising rate is high, it indicates that the frost layer on the surface of the heat exchange unit will increase in a short time. In order to ensure timely defrosting, the edge computing module can set a low thickness threshold and a suitable wind resistance rising rate threshold to ensure that the defrosting unit can defrost in time when the actual wind resistance rising rate is high, thereby ensuring the stability of the continuous normal work of the heat exchange unit.

[0054] The edge computing module determines the frost layer thickness distribution information according to the wind pressure difference, the temperature field distribution information and the environmental humidity, and combines multiple parameters to ensure the accuracy of the determined frost layer thickness distribution information, thereby ensuring that the defrosting module can defrost in time and accurately.

[0055] The edge computing module can be used to determine the actual wind resistance rise rate according to the wind pressure difference, and the actual wind resistance rise rate can reflect the thickness of the frost layer on the surface of the heat exchange unit. When the actual wind resistance rise rate is high, it indicates that the thickness of the frost layer is relatively large. When the actual wind resistance rise rate is greater than the wind resistance rise rate threshold, for example, the wind resistance rise rate threshold can be 15%, the control module can control the defrosting unit to defrost, thereby avoiding that the frost layer on the surface of the heat exchange unit is too thick to work normally.

[0056] When the environmental humidity is relatively large, it indicates that the thickness of the frost layer is relatively large after a short time. The edge computing module determines the wind resistance rise threshold in the critical defrosting threshold in combination with the environmental humidity, thereby improving the accuracy of the wind resistance rise threshold and ensuring that the defrosting unit can defrost in time. For example, when the environmental humidity is relatively large, the edge computing module can set the wind resistance rise threshold to be relatively small, thereby ensuring that the defrosting unit can defrost in time.

[0057] The inventor found through experiments that, compared with existing devices that defrost according to a single parameter, the defrosting control device provided in this embodiment can reduce the overall energy consumption by 15%-25%, and localized defrosting can avoid shutdown of the temperature regulation system in which the heat exchange unit is located. The defrosting control device provided in this embodiment can make the indoor temperature fluctuate by ≤1°C during defrosting. It can be seen that the defrosting control device provided in this embodiment can reduce energy consumption, basically does not affect the working state of the temperature regulation system, and can improve user experience.

[0058] Optionally, the control module is further configured to control the temperature regulation system in which the heat exchange unit is located to switch to a reverse circulation mode when the area of the target defrosting region is greater than or equal to a set area threshold.

[0059] Specifically, the set area threshold can be set according to actual conditions. For example, the set area threshold can be the total area of the set surface. When the area of the target defrosting region is greater than or equal to the set area threshold, it indicates that the frost layer on the surface of the heat exchange unit is relatively large, and localized defrosting will reduce the defrosting efficiency. In order to ensure the defrosting efficiency when the area of the target defrosting region is greater than or equal to the set area threshold, this embodiment sets the temperature regulation system in which the heat exchange unit is located to switch to a reverse circulation mode for self-defrosting, thereby avoiding that the temperature regulation system cannot work normally due to the frost layer being too thick.

[0060] When the temperature regulation system switches to the reverse circulation mode, the control module can also control all defrosting units to defrost, thereby accelerating the defrosting efficiency.

[0061] Optionally, when the heat exchange unit includes n heat exchange sub-units, the control module is further configured to control the frost layer of the heat exchange sub-unit with the thickest frost layer to be the target defrosting region, control the temperature regulation system in which the heat exchange sub-unit with the thickest frost layer is located to switch to a reverse circulation mode, and ensure that the temperature regulation system in which at least one heat exchange sub-unit is located works normally.

[0062] Specifically, when the heat exchange unit includes n heat exchange sub-units, it indicates that the system in which the heat exchange unit is located is a multi-connected system, and the defrosting control device provided in the embodiment can defrost the frost layer in the multi-connected system. The control module first processes the temperature regulation system with the most serious frost in the multi-connected system, while ensuring that at least one temperature regulation system maintains normal operation to avoid large fluctuations in indoor temperature.

[0063] Figure 2 is a front structure schematic diagram of a defrosting control device applied to a heat exchange unit according to an embodiment of the present application, referring to Figure 2 , a plurality of defrosting units 141 in the defrosting module are arranged in an array on the surface of the heat exchange unit 210; the defrosting unit 141 includes an electric heating wire; the area of the defrosting unit 141 is less than or equal to a set threshold.

[0064] Specifically, the plurality of defrosting units 141 are arranged in an array, which can basically ensure that each area of the heat exchange unit 210 is covered by the defrosting unit 141, thereby ensuring the defrosting effect of the defrosting module and avoiding the problem of not timely and accurate defrosting in the frost area due to the absence of the corresponding defrosting unit 141.

[0065] The defrosting unit 141 includes a heating wire, which can not only ensure the defrosting effect of the defrosting unit 141, but also reduce the cost of the defrosting unit 141, thereby reducing the manufacturing cost of the defrosting control device. Figure 2 The shape of the defrosting unit 141 in the embodiment is rectangular, which is only one of the shapes of the defrosting unit 141, and is not limited to the shape of the defrosting unit 141 provided in the embodiment. The shape of the defrosting unit 141 provided in the embodiment can be at least one or a combination of a square, a rectangle, a triangle, and a circle.

[0066] The set threshold can be set according to actual needs. For example, the set threshold can be 50mmx50mm, that is, 50mmx50mm is an independent control area.

[0067] Figure 3 is a side structure schematic diagram of a defrosting control device applied to a heat exchange unit according to an embodiment of the present application, referring to Figure 2 and Figure 3 The acquisition module includes a thermal imaging unit 111 and a differential pressure detection unit 112; the thermal imaging unit 111 is arranged on the windward side of the heat exchange unit 210, and the thermal imaging unit 111 is used to acquire the temperature field distribution information of the set surface of the heat exchange unit 210; the differential pressure detection unit 112 is arranged between the air inlet of the heat exchange unit 210 and the air outlet of the heat exchange unit 210, and the differential pressure detection unit 112 is used to acquire the air pressure difference of the heat exchange unit 210.

[0068] Specifically, the windward side of the heat exchange unit 210 refers to the side of the heat exchange unit 210 directly facing the air flow. In the heat exchange unit 210, the windward side refers to the side of the heat exchange unit 210 directly contacting the air and exchanging heat with the air during the evaporation process of the refrigerant. The windward side of the heat exchange unit 210 is prone to frost and the frost on the windward side of the heat exchange unit 210 has a greater impact on the working performance of the heat exchange unit 210. Therefore, the thermal imaging unit 111 is arranged on the windward side to collect the temperature field distribution information of the heat exchange unit 210 in the embodiment, so that the frost thickness of the heat exchange unit 210 can be obtained in time to ensure timely defrosting. The differential pressure detection unit 112 is arranged between the air inlet of the heat exchange unit 210 and the air outlet of the heat exchange unit 210, so as to ensure the accuracy of the air pressure difference collected by the differential pressure detection unit 112.

[0069] Optionally, with reference to Figure 3 , the collection module further comprises a humidity detection unit 113; the humidity detection unit 113 comprises a humidity sensor, and the humidity detection unit 113 is configured to detect the humidity of the environment in which the heat exchange unit 210 is located.

[0070] Specifically, the humidity detection unit 113 can be arranged near the heat exchange unit 210, so as to ensure that the humidity detection unit 113 accurately detects the humidity of the environment in which the heat exchange unit 210 is located.

[0071] It should be noted that, Figure 2 and Figure 3 The relative position relationship between the edge computing module 120 and the heat exchange unit 210 in the above embodiments is only one of the relative position relationships between the edge computing module 120 and the heat exchange unit 210 in the embodiments of the present application, and is not a limitation on the present application. In actual application, the relative position relationship between the edge computing module 120 and the heat exchange unit 210 can be set according to actual needs.

[0072] Optionally, the thermal imaging unit comprises an infrared thermal imaging sensor, and the infrared thermal imaging sensor is configured to collect the temperature field distribution information of the set surface of the heat exchange unit; the differential pressure detection unit comprises a differential pressure sensor, and the differential pressure sensor is configured to collect the air pressure difference of the heat exchange unit.

[0073] Specifically, the infrared thermal imaging sensor can generate a temperature distribution image by detecting infrared radiation emitted by the frost layer, which is used to monitor the temperature distribution of the surface of the heat exchange unit, so that the frosting condition can be more accurately judged, and the defrosting efficiency can be improved. In addition, the infrared thermal imaging sensor is not limited by light conditions and can be used in dark, smoky, hazy and other harsh environments, so that the defrosting control device provided in the embodiment can ensure normal defrosting in dark, smoky, hazy and other harsh environments. In addition, the infrared thermal imaging sensor has high detection accuracy (the accuracy can reach ±0.1℃), so that the temperature of the surface of the heat exchange unit can be accurately detected, unnecessary defrosting operation can be reduced, and energy can be saved. Moreover, the infrared thermal imaging sensor supports large-area scanning, so that the temperature of each region of the set surface can be obtained at the same time, and the problem of untimely defrosting caused by detecting the temperature of a single region can be avoided.

[0074] The differential pressure sensor can detect a small pressure, has a differential millisecond level response speed, supports continuous monitoring, and also has the characteristics of anti-vibration and corrosion resistance. Setting the differential pressure detection unit as the differential pressure sensor can improve the collection accuracy of the defrosting control device and prolong the service life.

[0075] The embodiment also provides a defrosting control method which can be applied to the defrosting control device provided in any embodiment of the application. Figure 4 is a flowchart of a defrosting control method according to an embodiment of the application, with reference to Figure 4 The defrosting control method provided in the embodiment includes the following steps.

[0076] S110, the acquisition module acquires the air pressure difference of the heat exchange unit and the temperature field distribution information of the set surface of the heat exchange unit.

[0077] S120, the edge computing module determines the critical defrosting threshold and the frost layer thickness distribution information of the set surface according to the air pressure difference and the temperature field distribution information.

[0078] The critical defrosting threshold includes a thickness threshold, and the thickness threshold is greater than 0.

[0079] S130, the control module determines the target defrosting region according to the frost layer thickness distribution information and the critical defrosting threshold, and controls the defrosting unit corresponding to the target defrosting region to defrost, wherein the frost layer thickness of the target defrosting region is all greater than or equal to the thickness threshold.

[0080] The defrosting control method provided in the embodiment can reduce defrosting energy consumption, ensure that the temperature regulation system in which the heat exchange unit is located continues to work during defrosting, and prolong the service life of the temperature regulation system and increase the application scenarios of the temperature regulation system.

[0081] The defrosting control method provided by the embodiment has corresponding beneficial effects of the defrosting control device provided by any embodiment of the present application, and the detailed technical details are not described in the embodiment. For details, see the defrosting control device provided by any embodiment of the present application.

[0082] The embodiment also provides a temperature regulation system, which comprises the defrosting control device provided by any embodiment of the present application.

[0083] Specifically, the temperature regulation system provided by the embodiment can further comprise a heat exchange unit, which can comprise one evaporator or multiple evaporators. The temperature regulation system provided by the embodiment can reduce defrosting energy consumption, ensure continuous operation of the temperature regulation system during defrosting, and also prolong the service life of the temperature regulation system and increase the application scenarios of the temperature regulation system.

[0084] It should be noted that, Figure 2 and Figure 3 The structures shown in the figures can be a front view and a side view of a temperature regulation system provided by the embodiment.

[0085] It should be understood that the above-mentioned various forms of flow can be reordered, added or deleted. For example, the steps described in the present application can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solutions of the present application can be achieved, which are not limited herein.

[0086] The above specific embodiments do not constitute a limitation on the scope of protection of the present application. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A defrosting control device, characterized in that, include: The module includes a data acquisition module, an edge computing module, a defrosting module, and a control module. The defrosting module includes multiple defrosting units disposed on the heat exchange unit; The acquisition module is used to acquire the wind pressure difference of the heat exchange unit and the temperature field distribution information of the set surface of the heat exchange unit; The edge computing module is used to determine the critical defrost threshold and the frost thickness distribution information of the set surface based on the wind pressure difference and the temperature field distribution information; wherein, the critical defrost threshold includes a thickness threshold, and the thickness threshold is greater than 0; The control module is used to determine the target defrosting area based on the frost thickness distribution information and the critical defrosting threshold, and to control the defrosting unit corresponding to the target defrosting area to defrost, wherein the frost thickness of the target defrosting area is greater than or equal to the thickness threshold. The acquisition module is also used to acquire the ambient humidity of the heat exchange unit. The edge computing module is also used to determine the frost formation rate on the heat exchange unit based on the wind pressure difference, the temperature field distribution information, and the ambient humidity. The control module is also used to determine the operating power of the defrosting unit corresponding to the target defrosting area based on the frost formation rate.

2. The defrosting control device according to claim 1, characterized in that, The edge computing module is specifically used to determine the critical defrost threshold, the actual wind resistance increase rate, and the frost thickness distribution information of the set surface based on the wind pressure difference, the temperature field distribution information, and the ambient humidity; wherein, the critical defrost threshold also includes a wind resistance increase rate threshold; The control module is specifically used to determine the target defrosting area based on the frost thickness distribution information and the thickness threshold, and to control the defrosting unit corresponding to the target defrosting area to defrost when the actual wind resistance increase rate is greater than or equal to the wind resistance increase rate threshold.

3. The defrosting control device according to claim 1, characterized in that, The control module is also used to control the temperature control system where the heat exchange unit is located to switch to reverse circulation mode when the area of ​​the target defrosting area is greater than or equal to a set area threshold.

4. The defrosting control device according to claim 1, characterized in that, The control module is also used to, when the heat exchange unit includes n heat exchange sub-units, control the frost layer of the heat exchange sub-unit with the thickest frost layer as the target defrosting area, and control the temperature control system of the heat exchange sub-unit with the thickest frost layer to switch to reverse circulation mode, while ensuring that the temperature control system of at least one of the heat exchange sub-units is working normally.

5. The defrosting control device according to claim 1, characterized in that, The defrosting module contains a plurality of defrosting units arranged in an array on the surface of the heat exchange unit; The defrosting unit includes an electric heating wire; The area of ​​the defrosting unit is less than or equal to a set threshold.

6. The defrosting control device according to any one of claims 1-5, characterized in that, The acquisition module includes a thermal imaging unit and a differential pressure detection unit; The thermal imaging unit is located on the windward side of the heat exchange unit, and the thermal imaging unit is used to collect the temperature field distribution information of a set surface of the heat exchange unit. The differential pressure detection unit is located between the air inlet and the air outlet of the heat exchange unit, and is used to collect the air pressure difference of the heat exchange unit.

7. The defrosting control device according to claim 6, characterized in that, The thermal imaging unit includes an infrared thermal imaging sensor, which is used to collect the temperature field distribution information of a set surface of the heat exchange unit. The differential pressure detection unit includes a differential pressure sensor, which is used to collect the air pressure difference of the heat exchange unit.

8. A defrosting control method, characterized in that, The defrosting control method is applied to the defrosting control device according to any one of claims 1-7; The defrosting control method includes: The acquisition module acquires the wind pressure difference of the heat exchange unit and the temperature field distribution information of the set surface of the heat exchange unit; The edge computing module determines the critical defrosting threshold and the frost thickness distribution information of the set surface based on the wind pressure difference and the temperature field distribution information; wherein, the critical defrosting threshold includes a thickness threshold, and the thickness threshold is greater than 0; The control module determines the target defrosting area based on the frost thickness distribution information and the critical defrosting threshold, and controls the defrosting unit corresponding to the target defrosting area to defrost, wherein the frost thickness of the target defrosting area is greater than or equal to the thickness threshold.

9. A temperature control system, characterized in that, Includes the defrosting control device as described in any one of claims 1-7.

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