Defrosting device of air source heat pump

Abstract

The defrosting device of the air source heat pump comprises an outer shell and a compressor, an evaporator is fixedly installed in the outer shell, a dehumidifier is arranged on one side of the outer shell, an exhaust pipe is fixedly connected to the other side of the outer shell, an exhaust fan is fixedly connected to the upper end of the outer shell, and the exhaust fan is fixedly connected to the lower end of the outer shell. The input end of the exhaust fan is fixedly connected with one end of an exhaust pipe, a temperature and humidity sensor is fixedly connected to the inner wall of the outer shell, a front cover is fixedly connected to the front end of the outer shell, a wireless module and a controller are fixedly connected to the outer wall of the front cover, and the output end of the dehumidifier is fixedly connected with an air inlet pipe through a flange. And the other end of the air inlet pipe communicates with the interior of the outer shell, and the compressor is fixedly connected to the outer side of the outer shell. The technical problems that according to an existing defrosting device, defrosting operation is mainly conducted after a coil pipe is frosted, hysteresis exists, and the treatment effect is common are solved.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration and air conditioning technology, and in particular to a defrosting device for an air source heat pump. Background Technology

[0002] For heat pumps that use air as a low-grade heat source, frost formation on the evaporator coil has always been a potentially difficult problem to solve, often becoming a major cause of heat pump shutdown failures. Conventional heat pump defrosting technology switches the system from heating to cooling mode, using indoor heat sources for defrosting. This defrosting method causes frequent refrigerant reversal, and the sudden change in operating conditions affects various system components, causing stress and strain. This is particularly evident in the lubrication system of reciprocating compressors, where damage is very noticeable.

[0003] The existing patent application number CN87202133 discloses a defrosting device for an outdoor coil of an air heat pump. The defrosting device of this utility model divides the outdoor coil into two groups and connects them in parallel. It uses a low-grade air heat source for a hot fluorine condensation box and consumes a small amount of mechanical work to eliminate the frost layer on the outdoor coil by switching between opposite directions through heat pump circulation.

[0004] The applicant found that existing defrosting devices mainly perform defrosting operations after the coils have frosted over, which results in a delay and generally poor treatment effect. Based on this, we propose an improved defrosting device for an air source heat pump. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the above-mentioned technology and provide a defrosting device for an air source heat pump.

[0006] Therefore, this utility model provides a defrosting device for an air source heat pump, including a housing and a compressor. An evaporator is fixedly installed inside the housing. A dehumidifier is provided on one side of the housing, and an exhaust pipe is fixedly connected to the other side of the housing. An exhaust fan is fixedly connected to the upper end of the housing. The input end of the exhaust fan is fixedly connected to one end of the exhaust pipe. A temperature and humidity sensor is fixedly connected to the inner wall of the housing. A front cover is fixedly connected to the front end of the housing. A wireless module and a controller are fixedly connected to the outer wall of the front cover.

[0007] Preferably, the output end of the dehumidifier is fixedly connected to an air inlet pipe via a flange, and the other end of the air inlet pipe is connected to the outer casing.

[0008] Preferably, the compressor is fixedly connected to the outside of the outer casing, a heating tube is fixedly connected to the outer wall of the compressor, a connecting pipe is fixedly connected to the bottom of the compressor, and the other end of the connecting pipe is fixedly connected to the coil of the evaporator.

[0009] Preferably, the heating tubes are spirally distributed on the outer wall of the compressor, the output end of the heating tubes is fixedly connected to the input end of the dehumidifier, the input end of the heating tubes is fixedly connected to a guide tube, and the other end of the guide tube is fixedly connected to the output end of the exhaust fan.

[0010] Preferably, the temperature and humidity sensor and the wireless module are both electrically connected to the controller, and the temperature and humidity sensor is located inside the housing near the air inlet side of the exhaust pipe.

[0011] Preferably, the upper end of the compressor is fixedly connected to an output pipe, and the other end of the evaporator coil away from the connecting pipe is disposed through the outer shell of the evaporator.

[0012] This utility model provides a defrosting device for an air source heat pump, which has the following beneficial effects:

[0013] (1) By setting up a structure including an outer casing, dehumidifier, air inlet pipe, exhaust pipe, and exhaust fan, and simultaneously using a temperature and humidity sensor, wireless module, and controller, the humidity of the environment inside the outer casing can be detected in real time by the temperature and humidity sensor. The exhaust fan draws out air while the dehumidifier introduces dry gas to reduce the humidity around the evaporator, thereby reducing moisture and fundamentally suppressing the problem of coil frost, and handling it promptly.

[0014] (2) By setting up an air inlet pipe and a heating pipe structure, the gas drawn out by the exhaust fan can be guided into the heating pipe attached to the surface of the compressor through the air inlet pipe for heating, and then guided into the dehumidifier, which can further improve the dehumidification effect. Attached Figure Description

[0015] Figure 1 This is an external structural diagram of the present invention;

[0016] Figure 2 This is a diagram of the internal structure of this utility model;

[0017] Figure 3 This is a structural diagram of the back of this utility model;

[0018] Figure 4 This is a bottom view of the structure of this utility model;

[0019] The markings in the diagram are: 1. Outer casing, 2. Evaporator, 3. Dehumidifier, 4. Compressor, 5. Inlet pipe, 6. Exhaust pipe, 7. Fan, 8. Heating element, 9. Guide pipe, 10. Output pipe, 11. Connecting pipe, 12. Temperature and humidity sensor, 13. Front cover, 14. Wireless module, 15. Controller. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments to aid in understanding its content. Unless otherwise specified, the methods used in this invention are conventional methods; the raw materials and apparatus used, unless otherwise specified, are conventional commercially available products.

[0021] Depend on Figures 1-4 As shown, this utility model provides a defrosting device for an air source heat pump, including a housing 1 and a compressor 4. An evaporator 2 is fixedly installed inside the housing 1. A dehumidifier 3 is provided on one side of the housing 1, and an exhaust pipe 6 is fixedly connected to the other side of the housing 1. An exhaust fan 7 is fixedly connected to the upper end of the housing 1. The input end of the exhaust fan 7 is fixedly connected to one end of the exhaust pipe 6. Dry gas is supplied to the housing 1 through the dehumidifier 3, and gas is simultaneously drawn out from the other end through the exhaust pipe 6 by the exhaust fan 7. This can accelerate the drying of the gas inside the housing 1, thereby reducing the moisture content in the gas and preventing frost from forming on the outer wall of the coil. A temperature and humidity sensor 12 is fixedly connected to the inner wall of the housing 1. A front cover 13 is fixedly connected to the front end of the housing 1. A wireless module 14 and a controller 15 are fixedly connected to the outer wall of the front cover 13.

[0022] The output end of the dehumidifier 3 is fixedly connected to the air inlet pipe 5 via a flange. The other end of the air inlet pipe 5 is connected to the inside of the outer casing 1. The temperature and humidity sensor 12 and the wireless module 14 are both electrically connected to the controller 15. The temperature and humidity sensor 12 detects the temperature and humidity of the environment inside the outer casing 1 and transmits the data to the controller 15 for processing and analysis. At the same time, the temperature and humidity data is sent to the backend via the wireless module 14 for relevant personnel to record and observe. The temperature and humidity sensor 12 is located inside the outer casing 1 near the air inlet of the exhaust pipe 6. The upper end of the compressor 4 is fixedly connected to the output pipe 10. The other end of the output pipe 10 is connected to the condenser. Since this is existing technology, it will not be described in detail here. The other end of the coil of the evaporator 2 away from the connecting pipe 11 is set through the outer casing of the evaporator 2.

[0023] The compressor 4 is fixedly connected to the outside of the outer casing 1. A heating tube 8 is fixedly connected to the outer wall of the compressor 4. A connecting pipe 11 is fixedly connected to the bottom of the compressor 4. The other end of the connecting pipe 11 is fixedly connected to the coil of the evaporator 2. The heating tubes 8 are spirally distributed on the outer wall of the compressor 4 to improve the heating efficiency of the gas inside the heating tubes 8. The output end of the heating tubes 8 is fixedly connected to the input end of the dehumidifier 3. A guide pipe 9 is fixedly connected to the input end of the heating tubes 8. The other end of the guide pipe 9 is fixedly connected to the output end of the exhaust fan 7. The gas is heated by the heat emitted by the compressor 4 through the heating tubes 8 and then sent into the dehumidifier 3, which can further improve the dehumidification efficiency.

[0024] In the description of this utility model, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inner", "outer", "back", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] However, the above description is only a specific embodiment of this utility model and should not be construed as limiting the scope of implementation of this utility model. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of this utility model should still fall within the scope of the claims of this utility model.

Claims

1. A defrosting device for an air source heat pump comprising an outer housing (1) and a compressor (4), characterized in that, The outer shell (1) is fixedly installed with an evaporator (2), one side of the outer shell (1) is provided with a dehumidifier (3), the other side of the outer shell (1) is fixedly connected with an exhaust pipe (6), the upper end of the outer shell (1) is fixedly connected with an exhaust fan (7), the input end of the exhaust fan (7) is fixedly connected with one end of the exhaust pipe (6), the inner wall of the outer shell (1) is fixedly connected with a temperature and humidity sensor (12), the front end of the outer shell (1) is fixedly connected with a front cover (13), the outer wall of the front cover (13) is fixedly connected with a wireless module (14) and a controller (15) respectively.

2. An air source heat pump defrosting device according to claim 1, wherein, The output end of the dehumidifier (3) is fixedly connected with an air inlet pipe (5) through a flange, and the other end of the air inlet pipe (5) is communicated with the inner wall of the outer shell (1).

3. An air source heat pump defrosting device as claimed in claim 1, wherein, The compressor (4) is fixedly connected outside the outer shell (1), the outer wall of the compressor (4) is fixedly connected with a heating pipe (8), the bottom of the compressor (4) is fixedly connected with a connecting pipe (11), and the other end of the connecting pipe (11) is fixedly connected with the coil pipe of the evaporator (2).

4. An air source heat pump defrosting apparatus as claimed in claim 3, wherein, The heating pipe (8) is spirally arranged on the outer wall of the compressor (4), the output end of the heating pipe (8) is fixedly connected with the input end of the dehumidifier (3), the input end of the heating pipe (8) is fixedly connected with a flow guide pipe (9), and the other end of the flow guide pipe (9) is fixedly connected with the output end of the exhaust fan (7).

5. An air source heat pump defrosting device as claimed in claim 1, wherein, The temperature and humidity sensor (12) and the wireless module (14) are electrically connected with the controller (15), and the temperature and humidity sensor (12) is arranged on the inner wall of the outer shell (1) close to the air inlet side of the exhaust pipe (6).

6. An air source heat pump defrosting device according to claim 1, wherein, The upper end of the compressor (4) is fixedly connected with an output pipe (10), and the coil pipe of the evaporator (2) is arranged through the outer shell of the evaporator (2) away from the other end of the connecting pipe (11).

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