Automatic defrosting mechanism of air source heat pump

Abstract

The utility model relates to the technical field of automatic defrosting, and provides an automatic defrosting mechanism of an air source heat pump, which comprises an air source heat pump body and a heat exchange evaporator, the heat exchange evaporator comprises a heat exchange fin, a defrosting pipe is fixedly mounted on the heat exchange fin, the air source heat pump body is communicated with a cold water pipe and a hot water pipe, and the cold water pipe is communicated with the hot water pipe. A heat preservation heating box is fixed to the outer wall of the air source heat pump body and communicated with a first water guide pipe, the first water guide pipe is communicated with one end of the defrosting pipe, the hot water pipe is further communicated with a water inlet pipe, the water inlet pipe is communicated with the heat preservation heating box, and the communication position is controlled by an electromagnetic control valve. The second water guide pipe communicates with a one-way water valve. The water inlet pipe is additionally arranged on the hot water pipe of the automatic defrosting mechanism of the air source heat pump and matched with the first water guide pipe, the defrosting pipe and the second water guide pipe, the heat exchange evaporator is defrosted, it is guaranteed that the heat exchange evaporator makes full contact with outside air, and the working efficiency of the heat exchange evaporator is not affected.

Description

Technical Field

[0001] The utility model relates to the technical field of automatic defrosting, and in particular to an automatic defrosting mechanism of an air source heat pump. Background Art

[0002] The working principle of air source heat pump is mainly to use the reverse Carnot principle to absorb heat from the ambient heat energy in the air through the evaporator to evaporate the heat transfer medium. Specifically, the evaporator is a very important component in the air source heat pump. It is responsible for exchanging heat between the low-temperature condensed "liquid" and the outside air, thereby vaporizing and absorbing heat to achieve the effect of cooling or heating.

[0003] When an air source heat pump is used for heating, when the surface temperature of the outdoor heat exchanger is lower than 0°C and the corresponding dew point temperature of the humid air at the same time, frost is likely to form on the fin surface. In order to prevent the heat transfer of the outdoor heat exchanger from deteriorating and ensure that the air can flow smoothly through the heat exchanger fins, the frost on the fin surface should be removed in time.

[0004] At present, the existing defrost mechanism (according to patent number: CN219572358U) discloses an automatic defrost mechanism of an air source heat pump, including a source heat pump body, the source heat pump body includes a fan, an exhaust pipe and a fin evaporator, the fin evaporator and the exhaust pipe are both arranged on the front side wall of the source heat pump body, and a defrost box is fixedly installed on the front side wall of the source heat pump body at a position corresponding to the fin evaporator, and the defrost box is a hollow rectangular body with an opening on the rear side.

[0005] However, in the process of implementing the above technical solution, it was found that there are at least the following technical problems: the mechanism uses a defrost box installed on the outside of the evaporator to perform defrosting operations, but in order to effectively absorb heat from the air, the evaporator needs to have sufficient contact with the outside air. Installing a defrost box on the outside reduces the working efficiency of the evaporator. For this reason, we propose an automatic defrost mechanism for an air source heat pump. Utility Model Content

[0006] The utility model proposes an automatic defrosting mechanism for an air source heat pump, which realizes the defrosting operation of the heat exchange evaporator when the heat exchange evaporator is in full contact with the outside air, and when the water temperature discharged from the hot water pipe is low, the electric heating plate in the thermal insulation heating box performs auxiliary heating, thereby effectively improving the working efficiency of the air source heat pump.

[0007] To this end, the present application provides an automatic defrosting mechanism for an air source heat pump, and the technical solution adopted is as follows:

[0008] The mechanism includes an air source heat pump body and a heat exchange evaporator, the heat exchange evaporator includes heat exchange fins, a defrost pipe is fixedly installed on the heat exchange fins, the air source heat pump body is connected to a cold water pipe and a hot water pipe, a thermal insulation heating box is fixed on the outer wall of the air source heat pump body, an electric heating plate is fixed inside the thermal insulation heating box, the thermal insulation heating box is connected to a water pipe 1, the water pipe 1 is connected to one end of the defrost pipe, the hot water pipe is also connected to a water inlet pipe, the water inlet pipe is connected to the thermal insulation heating box, and the connection point is controlled by an electromagnetic control valve, the cold water pipe is also connected to a water pipe 2, the water pipe 2 is connected to the other end of the defrost pipe and is connected to a one-way water valve.

[0009] A further technical solution is that the exterior of the heat-insulating heating box, water pipe one and water pipe two are all covered with a heat-insulating layer.

[0010] A further technical solution is that the air source heat pump body is provided with a drainage groove below the heat exchange evaporator.

[0011] A further technical solution is that the air source heat pump body is fixed with a vertically arranged fixing groove on one side of the heat exchange evaporator, and the interior of the fixing groove is rotatably connected with a vertically arranged threaded rod, one end of the threaded rod is fixed with a servo motor and is driven to rotate by the output shaft of the servo motor; a cleaning block threadedly connected to the threaded rod is fixed on the threaded rod, the cleaning block is horizontally arranged and can move up and down with the rotation of the threaded rod, and a cleaning brush is fixed to the bottom of the cleaning block, and the cleaning brush can contact the surface of the heat exchange evaporator.

[0012] A further technical solution is that a water pump is connected to the top of the thermal insulation heating box, the water outlet of the water pump is connected to a water pipe three, a spray pipe is fixed to the top of the air source heat pump body, the water pipe three is connected to the spray pipe, the spray pipe is located above the cleaning block, a collecting groove is opened on the top of the cleaning block, and a plurality of water guide holes are opened on the side wall of the collecting groove.

[0013] The working principle and beneficial effects of this application are:

[0014] 1. By adding a water inlet pipe to the hot water pipe of the automatic defrost mechanism of the air source heat pump, when the heat exchange evaporator is defrosted, the electromagnetic control valve is started to open the water inlet pipe, and the water inlet pipe cooperates with the first water pipe, the defrost pipe and the second water pipe to complete the defrosting of the heat exchange evaporator and ensure that the heat exchange evaporator is fully in contact with the outside air without affecting the working efficiency of the heat exchange evaporator.

[0015] 2. By adding a spray pipe and a cleaning brush to the automatic defrost mechanism of the air source heat pump, when the heat exchange evaporator is defrosted, the cleaning block moves to drive the cleaning brush to clean the frost on one side. During this period, the collection groove on the cleaning block collects the water sprayed by the spray pipe, and then the collected water is discharged from the water guide hole to the cleaning brush, thereby flushing the contact position with the cleaning brush, thereby accelerating the defrosting efficiency of the cleaning brush, and the cleaning brush can also clean the dust on one side. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0017] Figure 1 This is a schematic diagram of the overall structure of the automatic defrosting mechanism described in the embodiment of the present application;

[0018] Figure 2 This is a schematic diagram of the installation structure of the thermal insulation and heating box described in the embodiment of the present application;

[0019] Figure 3 This is a schematic diagram of the structure of the installation of the cleaning block described in the embodiment of the present application;

[0020] Figure 4 This is a schematic diagram of the overall structure of the cleaning block described in the embodiment of the present application.

[0021] In the figure: 1. air source heat pump body; 11. cold water pipe; 12. hot water pipe; 2. heat exchange evaporator; 21. heat exchange fins; 3. insulation heating box; 31. water pipe 1; 32. defrost pipe; 33. water inlet pipe; 34. solenoid control valve; 35. water pipe 2; 36. one-way water valve; 4. water pump; 41. water pipe 3; 42. spray pipe; 43. fixing groove; 44. threaded rod; 45. servo motor; 5. cleaning block; 51. collection groove; 52. water guide hole; 53. cleaning brush. DETAILED DESCRIPTION

[0022] The following will be combined with the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] like Figure 1-Figure 4As shown, the utility model proposes an automatic defrost mechanism of an air source heat pump, which includes an air source heat pump body 1 and a heat exchange evaporator 2, the heat exchange evaporator 2 includes a heat exchange fin 21, a defrost pipe 32 is fixedly installed on the heat exchange fin 21, the air source heat pump body 1 is connected with a cold water pipe 11 and a hot water pipe 12, a heat preservation and heating box 3 is fixed on the outer wall of the air source heat pump body 1, an electric heating plate is fixed inside the heat preservation and heating box 3, the heat preservation and heating box 3 is connected with a water guide pipe 1 31, the water guide pipe 1 31 is connected with one end of the defrost pipe 32, the hot water pipe 12 is also connected with a water inlet pipe 33, the water inlet pipe 33 is connected with the heat preservation and heating box 3, and the connection point is controlled by an electromagnetic control valve 34, the cold water pipe 11 is also connected with a water guide pipe 2 35, the water guide pipe 2 35 is connected with the other end of the defrost pipe 32 and is connected with a one-way water valve 36.

[0024] When the air source heat pump is in operation, cold water is transported to the inside of the air source heat pump body 1 through the cold water pipe 11, and then the cold water is heated by the air source heat pump body 1, and the heated cold water is discharged from the hot water pipe 12 for use. When defrosting is required, the electromagnetic control valve 34 is started, and the electromagnetic control valve 34 opens the water inlet pipe 33. The hot water transported by the hot water pipe 12 flows into the insulation heating box 3 through the water inlet pipe 33, and then the hot water is transported to the defrost pipe 32 through the water pipe 1 31, and then flows from the defrost pipe 32 to the water pipe 2 35 and finally transferred to the cold water pipe 11. During this period, the hot water flows to the defrost pipe 32 to heat the defrost pipe 32, and the defrost pipe 32 is connected to the heat exchange fins 21. The heated defrost pipe 32 defrosts the heat exchange fins 21.

[0025] In addition, a heat preservation layer is provided on the outside of the heat preservation heating box 3, the water conduit 1 31 and the water conduit 2 35. A drainage groove is provided on the air source heat pump body 1 below the heat exchange evaporator 2. The defrosted water on the heat exchange evaporator 2 flows into the drainage groove and is discharged through the drainage groove.

[0026] like Figure 3-Figure 4 As shown, the air source heat pump body 1 is fixed with a vertically arranged fixing groove 43 on one side of the heat exchange evaporator 2, and the interior of the fixing groove 43 is rotatably connected with a vertically arranged threaded rod 44, and one end of the threaded rod 44 is fixed with a servo motor 45 and is driven to rotate by the output shaft of the servo motor 45; a cleaning block 5 threadedly connected to the threaded rod 44 is fixed, and the cleaning block 5 is horizontally arranged and can move up and down with the rotation of the threaded rod 44, and a cleaning brush 53 is fixed to the bottom of the cleaning block 5, and the cleaning brush 53 can contact the surface of the heat exchange evaporator 2.

[0027] In addition, a water pump 4 is connected to the top of the thermal insulation heating box 3, and the water outlet of the water pump 4 is connected to a water pipe 3 41. A spray pipe 42 is fixed to the top of the air source heat pump body 1, and the water pipe 3 41 is connected to the spray pipe 42. The spray pipe 42 is located above the cleaning block 5. A collecting groove 51 is opened on the top of the cleaning block 5, and a plurality of water guide holes 52 are opened on the side wall of the collecting groove 51.

[0028] When in use, start the water pump 4 to pass the hot water in the heat preservation and heating box 3 into the water pipe 3 41, and then introduce it into the spray pipe 42 through the water pipe 3 41, and the spray pipe 42 sprays the outside of the heat exchange evaporator 2, and start the servo motor 45. The output shaft of the servo motor 45 rotates to drive the threaded rod 44 to rotate, and the threaded rod 44 is forced to rotate in the cleaning block 5. The threaded rotation of the threaded rod 44 adjusts the movement of the cleaning block 5. The movement of the cleaning block 5 drives the cleaning brush 53 to clean the frost on one side of the heat exchange evaporator 2. During this period, the collection groove 51 on the cleaning block 5 collects the water sprayed by the spray pipe 42, and then the collected water is discharged from the water guide hole 52 to the cleaning brush 53, so as to flush the contact position between the heat exchange evaporator 2 and the cleaning brush 53, thereby accelerating the defrosting efficiency of the cleaning brush 53.

[0029] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An automatic defrosting mechanism for an air source heat pump, comprising an air source heat pump body (1) and a heat exchange evaporator (2), characterized in that: The heat exchange evaporator (2) comprises a heat exchange fin (21), a defrost pipe (32) is fixedly mounted on the heat exchange fin (21), the air source heat pump body (1) is connected to a cold water pipe (11) and a hot water pipe (12), a heat preservation and heating box (3) is fixed on the outer wall of the air source heat pump body (1), an electric heating plate is fixed inside the heat preservation and heating box (3), the heat preservation and heating box (3) is connected to a water guide pipe 1 (31), the water guide pipe 1 (31) is connected to one end of the defrost pipe (32), the hot water pipe (12) is also connected to a water inlet pipe (33), the water inlet pipe (33) is connected to the heat preservation and heating box (3), and the connection point is controlled by an electromagnetic control valve (34), the cold water pipe (11) is also connected to a water guide pipe 2 (35), the water guide pipe 2 (35) is connected to the other end of the defrost pipe (32) and is connected to a one-way water valve (36).

2. The automatic defrosting mechanism of an air source heat pump according to claim 1, characterized in that: The exteriors of the heat-insulating heating box (3), the first water pipe (31) and the second water pipe (35) are all provided with a heat-insulating layer.

3. The automatic defrosting mechanism of an air source heat pump according to claim 2, characterized in that: The air source heat pump body (1) is provided with a drainage groove below the heat exchange evaporator (2).

4. The automatic defrosting mechanism of an air source heat pump according to claim 1, characterized in that: The air source heat pump body (1) is fixed with a vertically arranged fixing groove (43) on one side of the heat exchange evaporator (2); a vertically arranged threaded rod (44) is rotatably connected inside the fixing groove (43); a servo motor (45) is fixed to one end of the threaded rod (44) and is driven to rotate by the output shaft of the servo motor (45); A cleaning block (5) threadedly connected to the threaded rod (44) is fixed thereon; the cleaning block (5) is arranged horizontally and is capable of moving up and down as the threaded rod (44) rotates; a cleaning brush (53) is fixed at the bottom of the cleaning block (5); the cleaning brush (53) is capable of contacting the surface of the heat exchange evaporator (2).

5. The automatic defrosting mechanism of an air source heat pump according to claim 4, characterized in that: The top of the heat preservation and heating box (3) is connected to a water pump (4), the water outlet of the water pump (4) is connected to a water guide pipe (41), a spray pipe (42) is fixed to the top of the air source heat pump body (1), the water guide pipe (41) is connected to the spray pipe (42), the spray pipe (42) is located above the cleaning block (5), the top of the cleaning block (5) is provided with a collecting groove (51), and a plurality of water guide holes (52) are provided on the side wall of the collecting groove (51).

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