Defrosting device, control method thereof, and air conditioning unit

Abstract

The application discloses a defrosting device, a control method thereof and an air conditioning unit, wherein the defrosting device comprises: a heat carrier plate arranged on one side of a defrosting heat exchanger; a plurality of heat channels arranged on the heat carrier plate, the heat channels containing heat exchange fluid; and a switch valve corresponding to the plurality of heat channels, used for controlling the on-off of the plurality of heat channels. The application solves the problem that the defrosting scheme in the prior art cannot be used for partition defrosting, can effectively utilize a heat source to perform regional defrosting on a frosting area, has high utilization rate of the defrosting heat source, and can be performed without affecting the heating mode of the air conditioner, thereby greatly improving user experience.

Description

TECHNICAL FIELD

[0001] The present application relates to the air conditioning technical field, and in particular, relates to a defrosting device and a control method thereof, and an air conditioning unit. BACKGROUND

[0002] In the current air conditioning field, if air conditioning equipment is installed in a high-humidity area in winter, it will often face serious frosting. In the current common defrosting scheme, hot air is often used for defrosting, and hot air defrosting has the disadvantage of complex equipment, and can only defrost the entire area of the heat exchanger, and cannot defrost different areas. When only part of the heat exchanger is frosted, hot air defrosting undoubtedly has the problems of low energy utilization rate or incomplete defrosting.

[0003] In view of the problem that the defrosting scheme in the related art cannot defrost in different areas, no effective solution has been proposed so far. SUMMARY

[0004] The present application provides a defrosting device and a control method thereof, and an air conditioning unit, to at least solve the problems in the prior art.

[0005] To solve the above technical problems, according to an aspect of an embodiment of the present application, a defrosting device is provided, comprising:

[0006] A heat carrier plate is arranged on one side of a heat exchanger to be defrosted;

[0007] A plurality of hot channels are arranged on the heat carrier plate, and the hot channels contain heat exchange fluid;

[0008] A plurality of on-off valves are arranged one by one corresponding to the plurality of hot channels, and are used to control the on-off of the plurality of hot channels.

[0009] Further, it further comprises:

[0010] A fan is arranged on the other side of the heat exchanger to be defrosted.

[0011] Further, it further comprises:

[0012] A heating system is connected to the plurality of hot channels, and is used to provide heat exchange fluid.

[0013] Further, the heating system comprises:

[0014] A heat exchange fluid pipeline is connected to one end of the inlet of the plurality of hot channels, and is connected to the other end of the outlet of the plurality of hot channels;

[0015] A high-temperature refrigerant pipeline is used to exchange heat with the heat exchange fluid pipeline, and heat the heat exchange fluid in the heat exchange fluid pipeline.

[0016] Further, the heat carrier plate is a fence structure, and the plurality of hot channels are evenly arranged on the fence structure.

[0017] Further, the heat carrier plate can be adjusted in rotation, so that the position relationship of the heat carrier plate relative to the defrosting-required heat exchanger includes at least a vertical position and a parallel position.

[0018] Further, the heat transfer fluid is water.

[0019] Further, the method further comprises:

[0020] The scanning device is configured to scan the surface of the defrosting-required heat exchanger to determine the frosting condition of the defrosting-required heat exchanger.

[0021] According to another aspect of the embodiments of the present application, a defrosting device control method is provided, which is applied to the defrosting device as described above, and the method comprises:

[0022] detecting the frosting condition of the defrosting-required heat exchanger; wherein the frosting condition includes at least a frosting area and a frosting degree;

[0023] controlling the operation of the heat carrier plate, the hot channel and the fan according to the frosting condition.

[0024] Further, the controlling of the operation of the heat carrier plate, the hot channel and the fan according to the frosting condition comprises:

[0025] determining whether there is a frosting area;

[0026] if yes, controlling the position relationship of the heat carrier plate relative to the defrosting-required heat exchanger to be a parallel position, controlling the fan to be turned on, and controlling the hot channel to be turned on or off according to the frosting condition;

[0027] otherwise, controlling the position relationship of the heat carrier plate relative to the defrosting-required heat exchanger to be a vertical position, and controlling the fan and the hot channel to be turned off.

[0028] Further, the controlling of the hot channel to be turned on or off according to the frosting condition comprises:

[0029] controlling the opening of the switch valve of the hot channel corresponding to the position of the frosting area; wherein when the number of the hot channels corresponding to the position of the frosting area is more than one, the switch valve of the hot channel is controlled to be turned on according to the frosting degree.

[0030] Further, the controlling of the switch valve of the hot channel to be turned on according to the frosting degree comprises:

[0031] controlling the opening sequence of the switch valve according to the frosting degree; wherein the switch valve of the hot channel corresponding to the frosting area with the heaviest frosting degree is preferably turned on first, and the switch valve of the hot channel corresponding to the frosting area with the lightest frosting degree is turned on last.

[0032] Further, after the controlling of the hot channel to be turned on or off according to the frosting condition, the method further comprises:

[0033] detecting whether the defrosting of the frosting area is completed.

[0034] When the defrosting in the defrosting area is completed, the position of the heat carrier plate relative to the heat exchanger to be defrosted is controlled to be vertical, and the fan and the heat passage are controlled to be closed.

[0035] According to still another aspect of the embodiments of the present application, there is provided an air conditioning unit comprising the defrosting device as described above.

[0036] According to still another aspect of the embodiments of the present application, there is provided a storage medium containing computer executable instructions for performing the defrosting device control method as described above when executed by a computer processor.

[0037] In the present application, a sub-area defrosting scheme is provided, in which a plurality of heat passages are arranged on the heat carrier plate, and the on-off of the plurality of heat passages is controlled by using the on-off valve, so as to realize the sub-area designated defrosting of different frosting areas. The scheme can effectively utilize the heat source to perform the sub-area defrosting of the frosting area, and is simple and has high utilization rate of the defrosting heat source. Meanwhile, the defrosting can be performed without affecting the heating mode of the air conditioning equipment, and the user experience is greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 is a schematic structural view of an optional defrosting device according to the embodiments of the present application;

[0039] Figure 2 is a schematic structural view of an optional heat carrier plate according to the embodiments of the present application;

[0040] Figure 3 is another schematic structural view of an optional defrosting device according to the embodiments of the present application;

[0041] Figure 4 is still another schematic structural view of an optional defrosting device according to the embodiments of the present application;

[0042] Figure 5 is an optional flow chart of a defrosting device control method according to the embodiments of the present application. DETAILED DESCRIPTION

[0043] The exemplary embodiments will be described in detail hereinbelow with reference to the drawings. In the following description, the same numbers in different drawings represent the same or similar elements unless otherwise represented. The embodiments described in the following exemplary embodiments do not represent all the embodiments consistent with the present application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the present application as detailed in the appended claims.

[0044] Embodiment 1

[0045] In the preferred embodiment 1 of the present application, a defrosting device is provided, in particular, Figure 1 An optional structural schematic diagram of the defrosting device is shown in FIG. 1, which comprises: Figure 1

[0046] A heat carrier plate 1 is arranged on one side of the heat exchanger 4 to be defrosted, and a plurality of heat channels 2 are arranged on the heat carrier plate 1, and the heat channels 2 have heat exchange fluid. Meanwhile, the device is also provided with a plurality of on-off valves 3 corresponding to the plurality of heat channels 2, which are used to control the on-off of the plurality of heat channels 2. Figure 2 An optional structural schematic diagram of the heat carrier plate 1 is shown in FIG. 2, which is arranged with high-efficiency heat channels 2 distributed in a transverse direction, and the heat channels 2 are divided into first heat channels 21, second heat channels 22 and third heat channels 23 from top to bottom, and each heat channel 2 is equipped with an on-off valve 3 for controlling the flow of heat exchange fluid in the heat channel 2. The high-efficiency heat channels 2 can be made of high-thermal-conductivity materials such as copper pipes, and the heat exchange fluid can be hot water. The high-efficiency heat channels 2 can be in a spiral coil structure to increase the heat dissipation area of the heat exchange fluid. Figure 2

[0047] As shown in FIG. 3, the defrosting device further comprises: a fan 5 arranged on the other side of the heat exchanger 4 to be defrosted; and a heating system 6 connected with the plurality of heat channels 2 for providing heat exchange fluid. The heating system 6 comprises: a heat exchange fluid pipeline 61 connected at one end with the inlet of the plurality of heat channels 2 and at the other end with the outlet of the plurality of heat channels 2; and a high-temperature refrigerant pipeline 62 for heat exchange with the heat exchange fluid pipeline 61 to heat the heat exchange fluid in the heat exchange fluid pipeline 61. The heat exchange fluid is water. The heat carrier plate 1 of the defrosting device also needs to be used in combination with the fan 5, a conventional heating hot water system and the like, as shown in FIG. 4. Figure 1 As shown in FIG. 5, in the current common heating system 6, high-temperature hot water can be prepared by using a high-temperature refrigerant loop, and the obtained hot water is delivered through a flow path into the high-efficiency heat channels 2 on the heat carrier plate 1, and then backflows through the flow path to the heating system 6. The high-efficiency heat channels 2 on the heat carrier plate 1 radiate heat due to the flow of the heat fluid, and the radiated heat is delivered by the fan 5 to the surface of the heat exchanger 4 to be defrosted of the air conditioning equipment for defrosting. Figure 1 In the above embodiment, a sub-regional defrosting scheme is provided, which realizes sub-regional specified defrosting of different frosting regions by arranging a plurality of heat channels on a heat carrier plate and using on-off valves to control the on-off of the plurality of heat channels. This scheme can effectively utilize the heat source to defrost the frosting regions in sub-regions, is simple to realize, has high utilization rate of defrosting heat source, and can be performed without affecting the heating mode of the air conditioning equipment, thereby greatly improving the user experience.

[0048]

[0049] ​​​Preferably, the heat carrier plate 1 is in a fence structure, and the plurality of heat channels 2 are evenly arranged on the fence structure. In addition, the heat carrier plate 1 can be adjusted in rotation, so that the position relationship of the heat carrier plate 1 relative to the defrosting heat exchanger 4 at least includes a vertical position and a parallel position.

[0050] When the air conditioning equipment does not need to defrost, i.e. the defrosting device is in a non-working period, the heat carrier plate 1 can be adjusted in angle, so that the overall plane of the heat carrier plate 1 is perpendicular to the surface of the heat exchanger, as shown in FIG. 4, so as to minimize the wind blocking effect of the defrosting device and ensure the air supply performance of the air conditioning equipment. The heat carrier plate 1 can also be arranged in a fence structure, which also improves the air permeability. Figure 3

[0051] Preferably, the defrosting device further comprises a scanning device for scanning the surface of the defrosting heat exchanger 4 to determine the frosting condition of the defrosting heat exchanger 4.

[0052] When the air conditioning equipment enters the defrosting program, i.e. the defrosting device is in a working period, the scanning device arranged near the heat exchanger is turned on to scan and identify the frosting condition of the surface of the heat exchanger. According to the scanning result, the frosting position and degree of the surface of the heat exchanger can be identified. For example, when there is no frosting in the upper area of the heat exchanger and there is frosting in the lower area, according to the spectrum scanning result, the light signal can be converted into an electric signal, finally indicating that the first heat channel 21 and the second heat channel 22 of the heat carrier plate 1 are closed by the switch valve 3, and the third heat channel 23 is opened by the switch valve 3, so that the high-efficiency heat channel 2 below the heat carrier plate 1 has hot fluid flowing therethrough, and the heat emitted will also be transported to the surface of the heat exchanger by the fan 5 for defrosting the lower area of the heat exchanger. During the defrosting of the heat exchanger, the scanning device continues to work until the scanning result shows that there is no frosting on the surface of the heat exchanger, and then the scanning device stops working. When the whole area of the heat exchanger is frosted, the switch valves 3 of all the high-efficiency heat channels 2 are opened, and at this time the overall plane of the heat carrier plate 1 is parallel to the surface of the heat exchanger, as shown in FIG. 5, so that all the high-efficiency heat channels 2 of the heat carrier plate 1 have hot fluid flowing therethrough, and the heat emitted will also be transported to the surface of the heat exchanger by the fan 5 for defrosting the whole area of the heat exchanger. Figure 4

[0053] The number, structure and specific arrangement of the high-efficiency heat channels 2 arranged on the heat carrier plate 1 can be flexibly set according to the area and structure of the heat exchanger of the air conditioning equipment. The start-stop state and time length of the switch valve 3 equipped in each high-efficiency heat channel 2 can be flexibly controlled according to the frosting condition of the heat exchanger scanned by the scanning device, such as preferentially opening the switch valve 3 of the corresponding high-efficiency heat channel 2 for the heavy frosting area, and immediately closing the switch valve 3 of the corresponding high-efficiency heat channel 2 for the defrosted area, so as to reasonably utilize the defrosting heat source and improve the overall energy efficiency.

[0054] ​​Because the heat source supply method of this defrosting device is different from that of conventional refrigerant reverse heat pump defrosting, there is no need to switch the direction of the four-way valve. When this defrosting device is working, the air conditioning equipment can heat without stopping, which greatly improves the user experience.

[0055] Compared to commonly used hot air defrosting devices, this defrosting device features zoned controllability. This zoned controllability is achieved by starting and stopping defrosting based on the spectral imaging results of the frost formation identified by the scanning device. The efficient thermal channels, acting as heat sources, are equipped with on / off valves that can be opened on specific commands to provide heat for dissipation. Furthermore, the zoned arrangement of these efficient thermal channels facilitates targeted defrosting of specific frost-covered areas.

[0056] Example 2

[0057] In a preferred embodiment 2 of the present invention, a defrosting device control method is provided, which is applied to the defrosting device in embodiment 1 above. Specifically, Figure 5 An optional flowchart of the method is shown, such as Figure 5 As shown, the method includes the following steps S502-S504:

[0058] S502: Detect the frosting condition of the heat exchanger to be defrosted; the frosting condition includes at least the frosting area and the degree of frosting.

[0059] S504: Control the operation of the heat transfer plate, heat channel and fan according to the frosting condition.

[0060] In the above embodiments, a zoned defrosting scheme is provided. By setting multiple heat channels on the heat transfer plate and using on / off valves to control the opening and closing of these channels, zoned defrosting of different frosted areas can be achieved. This scheme can effectively utilize the heat source for zoned defrosting of frosted areas, is simple to implement, and has a high heat source utilization rate. Furthermore, it can be performed without affecting the heating mode of the air conditioning equipment, greatly improving the user experience.

[0061] The operation of the heat transfer plate, hot aisle, and fan is controlled according to the frosting condition, including: determining whether there is a frosting area; if so, controlling the position of the heat transfer plate relative to the heat exchanger to be defrosted to a parallel position, controlling the fan to start, and controlling the opening and closing of the hot aisle according to the frosting condition; otherwise, controlling the position of the heat transfer plate relative to the heat exchanger to be defrosted to a vertical position, and controlling the fan and hot aisle to close.

[0062] Controlling the opening and closing of hot channels according to the frosting condition includes: controlling the opening of the valves of the hot channels corresponding to the frosting area; wherein, when there are multiple hot channels corresponding to the frosting area, the opening and closing valves of the hot channels are controlled according to the degree of frosting.

[0063] According to the frost degree, the opening of the switch valve of the heat channel is controlled, including: according to the frost degree, the opening sequence of the switch valve is controlled; wherein, the switch valve of the heat channel corresponding to the frost area with the heaviest frost degree is preferably opened, and the switch valve of the heat channel corresponding to the frost area with the lightest frost degree is opened last.

[0064] After the switch of the heat channel is controlled according to the frost condition, including: detecting whether the defrosting of the frost area is completed; when the defrosting of the frost area is completed, the position relationship of the heat plate relative to the heat exchanger to be defrosted is controlled to a vertical position, and the fan and the heat channel are controlled to be closed.

[0065] When the air conditioning equipment does not need to defrost, that is, the defrosting device is in a non-working period, the heat plate can be angle-adjusted, so that the overall plane thereof is perpendicular to the surface of the heat exchanger, so as to minimize the wind blocking effect of the defrosting device and ensure the air supply performance of the air conditioning equipment.

[0066] When the air conditioning equipment enters the defrosting program, that is, the defrosting device is in a working period, the scanning device arranged near the heat exchanger is opened, and the frost condition of the surface of the heat exchanger is scanned and identified. According to the scanning result, the frost position and degree of the surface of the heat exchanger can be identified. For example, when no frost appears in the upper area of the heat exchanger and frost appears in the lower area, according to the spectrum scanning result, the light signal can be converted into an electric signal, finally indicating that the switch valves of the first heat channel and the second heat channel on the heat plate are closed, and the switch valve of the third heat channel is opened, so that the high-efficiency heat channel below the heat plate has hot fluid flowing therethrough, and the heat emitted will also be transported to the surface of the heat exchanger by the fan to defrost the lower area of the heat exchanger. During the defrosting of the heat exchanger, the scanning device continuously works until the scanning result feedbacks that there is no frost on the surface of the heat exchanger, and then the scanning device stops working. When frost appears in all areas of the heat exchanger, the switch valves of all high-efficiency heat channels are opened, at this time, the overall plane of the heat plate is parallel to the surface of the heat exchanger, and all high-efficiency heat channels of the heat plate have hot fluid flowing therethrough, and the heat emitted will also be transported to the surface of the heat exchanger by the fan to defrost all areas of the heat exchanger.

[0067] Embodiment 3

[0068] Based on the defrosting device provided in Embodiment 1, in the preferred Embodiment 3 of the present application, an air conditioning unit is also provided, which comprises the defrosting device as described above.

[0069] In the above-mentioned embodiments, a sub-area defrosting scheme is provided, in which a plurality of heat channels are arranged on the heat plate, and the on-off of the plurality of heat channels is controlled by using the switch valve, so as to realize the sub-area specified defrosting of different frost areas. This scheme can effectively utilize the heat source to defrost the frost areas in a sub-area, is simple to implement, and has high utilization rate of the defrosting heat source. At the same time, the defrosting can be performed without affecting the heating mode of the air conditioning equipment, thereby greatly improving the user experience.

[0070] Example 4

[0071] Based on the defrosting device control method provided in the above-mentioned example 2, in the preferred example 4 of the present application, a storage medium containing computer executable instructions for executing the defrosting device control method as described above when executed by a computer processor is also provided.

[0072] In the above-mentioned embodiments, a sub-regional defrosting scheme is provided, in which a plurality of heat channels are arranged on the heat carrier plate, and a switch valve is used to control the on-off of the plurality of heat channels, so as to realize sub-regional designated defrosting of different frosting areas. This scheme can effectively utilize the heat source to perform sub-regional defrosting on the frosting area, is simple to implement, and has high utilization rate of defrosting heat source. At the same time, it can be performed without affecting the heating mode of the air conditioning equipment, greatly improving the user experience.

[0073] Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. It is intended that the specification and examples be considered as exemplary only, with the true scope and spirit of the application being indicated by the following claims.

[0074] It should be understood that the application is not limited to the precise construction that has been described above and shown in the accompanying drawings, and that various modifications and changes can be made by those skilled in the art without departing from the scope of the application. The scope of the application is limited only by the appended claims.

Claims

1. A defrosting device, characterized in that, include: A heat transfer plate (1) is placed on one side of the heat exchanger (4) to be defrosted; Multiple heat channels (2) are disposed on the heat transfer plate (1), and heat exchange fluid is contained in the heat channels (2); A switching valve (3) is provided in a one-to-one correspondence with the multiple heat channels (2) to control the opening and closing of the multiple heat channels (2); A fan (5) is located on the other side of the heat exchanger (4) to be defrosted; The heat carrier plate (1) can be rotated and adjusted so that the positional relationship of the heat carrier plate (1) relative to the defrosting heat exchanger (4) includes at least a vertical position and a parallel position; When the defrosting device has a frosted area on the heat exchanger (4) to be defrosted, it controls the position of the heat carrier plate (1) relative to the heat exchanger (4) to be defrosted to a parallel position, controls the fan (5) to be turned on, and controls the opening and closing of the heat channel (2) according to the frosting situation; wherein the frosting situation includes at least the frosting area and the degree of frosting. When there is no frosting area on the heat exchanger (4) to be defrosted, the position of the heat transfer plate (1) relative to the heat exchanger (4) to be defrosted is controlled to be vertical, and the fan (5) and the heat channel (2) are controlled to be closed.

2. The defrosting device according to claim 1, characterized in that, Also includes: A heating system (6) is connected to the multiple heat channels (2) and is used to provide the heat exchange fluid.

3. The defrosting device according to claim 2, characterized in that, The heating system (6) includes: The heat exchange fluid pipeline (61) is connected at one end to the inlet of the plurality of heat channels (2) and at the other end to the outlet of the plurality of heat channels (2); The high-temperature refrigerant pipeline (62) exchanges heat with the heat exchange fluid pipeline (61) to heat the heat exchange fluid in the heat exchange fluid pipeline (61).

4. The defrosting device according to claim 1, characterized in that, The heat transfer plate (1) is a grid structure, and the multiple heat channels (2) are evenly arranged on the grid structure.

5. The defrosting device according to claim 1, characterized in that, The heat exchange fluid is water.

6. The defrosting device according to claim 1, characterized in that, Also includes: A scanning device is used to scan the surface of the heat exchanger (4) to be defrosted and determine the frosting condition of the heat exchanger (4).

7. A defrosting device control method, applied to the defrosting device as described in any one of claims 1 to 6, characterized in that, The method includes: The frosting condition of the heat exchanger to be defrosted is detected; wherein, the frosting condition includes at least the frosting area and the degree of frosting. Control the operation of the heat transfer plate, heat channel, and fan according to the frosting condition.

8. The method according to claim 7, characterized in that, Controlling the operation of the heat transfer plate, heat channel, and fan based on the frosting condition includes: Determine if there are any areas of frost. If so, the position of the heat transfer plate relative to the heat exchanger to be defrosted is controlled to be parallel, the fan is controlled to be turned on, and the opening and closing of the hot channel is controlled according to the frosting situation. Otherwise, the position of the heat transfer plate relative to the defrosting heat exchanger is controlled to be vertical, and the fan and the heat channel are controlled to be closed.

9. The method according to claim 8, characterized in that, Controlling the opening and closing of the hot channel based on the frosting condition includes: The on / off valve of the hot channel corresponding to the location of the frosting area is controlled to open; wherein, when there are multiple hot channels corresponding to the location of the frosting area, the on / off valve of the hot channel is controlled to open according to the degree of frosting.

10. The method according to claim 9, characterized in that, Controlling the opening and closing of the hot channel valve according to the degree of frost formation includes: The opening sequence of the switching valves is controlled according to the degree of frost formation; wherein, the switching valve of the hot channel corresponding to the frost area with the heaviest frost formation is opened first, and the switching valve of the hot channel corresponding to the frost area with the lightest frost formation is opened last.

11. The method according to claim 8, characterized in that, After controlling the opening and closing of the hot channel based on the frosting condition, the following steps are included: Detect whether the frosted area has completely defrosted; When defrosting is complete in the frosted area, the position of the heat transfer plate relative to the heat exchanger to be defrosted is controlled to be vertical, and the fan and the hot passage are controlled to be closed.

12. An air conditioning unit, characterized in that, Includes the defrosting device as described in any one of claims 1 to 6.

13. A storage medium containing computer-executable instructions, characterized in that, The computer-executable instructions, when executed by a computer processor, are used to perform the defrosting device control method as described in any one of claims 7 to 11.

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