Ultralow-temperature air source heat pump defrosting device

Abstract

The utility model discloses an ultra-low temperature air source heat pump defrosting device which comprises a shell, an air source heat pump body and a compressor, the air source heat pump body and the compressor are both arranged in the shell, a plurality of coil pipes are installed on the outer surface of the air source heat pump body, a bottom plate is fixedly arranged at the position, close to the bottom end, in the shell, and the bottom plate is fixedly connected with the air source heat pump body. The air source heat pump body and the compressor are arranged above the bottom plate, guide blocks are arranged on the two sides of the lower portion of the bottom plate, a guide groove is formed between the guide blocks on the two sides, and the end, away from the interior of the shell, of the guide groove is fixedly connected with a drainage pipe penetrating and extending to the outer side of the shell. Water drops generated by defrosting drop on the bottom plate and then drop on the guide blocks from the through holes, and the two guide blocks are arranged obliquely downwards, so that the water can be guided to flow into the guide grooves and is finally discharged through the drainage pipe, and the bottom of the air source heat pump body can be prevented from being eroded by the water.

Description

Technical Field

[0001] The utility model relates to the technical field of air source heat pumps, and particularly relates to a defrosting device for an ultra-low temperature air source heat pump. Background Technique

[0002] Generally, it is not easy for low-temperature heat pumps and conventional heat pumps to have defrosting failures or incomplete defrosting. However, in ultra-low temperature conditions, heat pumps are prone to incomplete defrosting or even failure. For commercial top-outlet air heat pumps, the V-shaped or U-shaped design is adopted. The upper part has a high wind speed and good heat exchange, while the lower part has a low wind speed and poor heat exchange, making it easy to frost. When the humidity is high or it is raining, the frost is thick. Moreover, during defrosting, the condensed water from the upper part flows downwards and may freeze again if the temperature is low. Once the defrosting is incomplete, it will accumulate thicker and thicker, resulting in abnormal heat exchange and even freezing damage to the evaporator.

[0003] The prior art improves the evaporator design and refrigeration system. For example, there are two liquid distribution pipes on the liquid pipe side of the evaporator, and one of them has a solenoid valve. The solenoid valve is normally open during heating and refrigeration. When entering the defrosting operation, the solenoid valve closes. After the compressor starts, when the high-pressure pressure or the coil temperature or the operation time reaches set value one, the solenoid valve opens; when the high-pressure pressure or the coil temperature or the operation time reaches set value two, the defrosting is exited and the defrosting is completed. This aims to make the lower part enter the defrosting first and reach a certain temperature, and then the upper part enters the defrosting. On the one hand, the lower part itself frosts more and requires a longer defrosting time; on the other hand, the condensed water flowing down from the upper part during defrosting requires more heat.

[0004] However, the water generated after defrosting will drip onto the bottom end of the air source heat pump, and the long-term accumulation of moisture will erode the air source heat pump. Moreover, the coil structure is exposed outside the air source heat pump, and long-term use will affect the service life of the coil structure. Therefore, it does not meet the existing requirements, and for this reason, we propose a defrosting device for an ultra-low temperature air source heat pump. Content of the Utility Model

[0005] The purpose of the utility model is to provide a defrosting device for an ultra-low temperature air source heat pump to solve the problems proposed in the above background technique, that is, the water generated after defrosting will drip onto the bottom end of the air source heat pump, the long-term accumulation of moisture will erode the air source heat pump, and the coil structure is exposed outside the air source heat pump, and long-term use will affect the service life of the coil structure.

[0006] To achieve the above object, the present utility model provides the following technical solutions: A cryogenic air source heat pump defrosting device, comprising a housing, an air source heat pump body and a compressor. The air source heat pump body and the compressor are both arranged inside the housing. One side of the upper end of the compressor is connected with a three-way joint. Both ends of the three-way joint are connected with distributors through connecting pipes. A plurality of coils are installed on the outer surface of the air source heat pump body. The coils are distributed up and down and are respectively connected with the two distributors through connecting pipes. A bottom plate is fixedly arranged near the bottom end inside the housing, and the air source heat pump body and the compressor are both arranged above the bottom plate. Guide blocks are arranged on both sides below the bottom plate. A guide groove is formed between the two guide blocks. One end of the guide groove far away from the inside of the housing is fixedly connected with a drain pipe that penetrates and extends to the outside of the housing.

[0007] Preferably, a plurality of fixing seats are fixedly connected to the front and rear sides of the outer surface of the air source heat pump body. A first arc-shaped groove matching the coil is formed in the middle of one side of each fixing seat far away from the air source heat pump body.

[0008] Preferably, a docking seat is connected to one side of the fixing seat far away from the air source heat pump body. A clamping groove is formed on one side of the docking seat close to the fixing seat, and the docking seat is clamped to the outer surface of the docking seat through the clamping groove. A second arc-shaped groove corresponding to the first arc-shaped groove is formed in the middle of the inside of the clamping groove. The outer surface of the coil is respectively attached to the inner walls of the first arc-shaped groove and the second arc-shaped groove.

[0009] Preferably, a movable groove is formed inside the upper end of the docking seat. A spring pin that penetrates the movable groove and extends into the clamping groove is movably connected inside the movable groove. A limiting groove matching the spring pin is formed in the upper end of the fixing seat, and one end of the spring pin that penetrates and extends into the clamping groove is inserted into the limiting groove.

[0010] Preferably, a slider is fixedly connected to the bottom end inside the clamping groove. A sliding groove is formed in the bottom end of the fixing seat, and the slider is slidably connected inside the sliding groove.

[0011] Preferably, a plurality of through holes are formed on the surface of the bottom plate. Both of the guide blocks are arranged obliquely downward, and the lowest ends of the two guide blocks are connected to the guide groove.

[0012] Compared with the prior art, the beneficial effects of the present utility model are:

[0013] 1. In the present utility model, the water droplets generated by defrosting fall on the bottom plate, and then fall into the guide blocks through the through holes. Since the two guide blocks are arranged obliquely downward, the water can be guided into the guide groove and finally discharged through the drain pipe, thereby preventing the water from eroding the bottom of the air source heat pump body.

[0014] 2. By pulling the spring pin, one end of the spring pin is disengaged from the insertion into the limit groove, and then the docking seat is pushed, causing the slider to slide along the sliding groove and move towards the side away from the fixed seat. Thus, the docking seat can be separated from the fixed seat, and the coil pipe can be removed from the outer surface of the air source heat pump body for replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the whole of the present utility model;

[0016] Figure 2 is a front cross-sectional view of the whole of the present utility model;

[0017] Figure 3 is a side view of the air source heat pump body and the coil pipe of the present utility model;

[0018] Figure 4 For the present utility model Figure 3 is a schematic structural diagram of the part at A in

[0019] In the figure: 1. Housing; 2. Air source heat pump body; 3. Compressor; 4. Bottom plate; 401. Through hole; 5. Coil pipe; 6. Guide block; 601. Guide groove; 7. Three-way joint; 8. Distributor; 9. Drain pipe; 10. Fixed seat; 1001. First arc-shaped groove; 1002. Limit groove; 1003. Sliding groove; 11. Docking seat; 1101. Card slot; 1102. Second arc-shaped groove; 1103. Movable groove; 12. Spring pin; 13. Slider. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0021] Please refer to Figures 1 to 4 , an embodiment provided by the present utility model: A super-low temperature air source heat pump defrosting device includes a housing 1, an air source heat pump body 2 and a compressor 3. The air source heat pump body 2 and the compressor 3 are both arranged inside the housing 1. One side of the upper end of the compressor 3 is connected with a three-way joint 7. Both ends of the three-way joint 7 are connected with distributors 8 through connecting pipes. A plurality of coil pipes 5 are installed on the outer surface of the air source heat pump body 2. The coil pipes 5 are distributed up and down and are respectively connected with the two distributors 8 through connecting pipes. A bottom plate 4 is fixedly arranged near the bottom end inside the housing 1, and the air source heat pump body 2 and the compressor 3 are both arranged above the bottom plate 4. Guide blocks 6 are arranged on both sides below the bottom plate 4. A guide groove 601 is opened between the two guide blocks 6. One end of the guide groove 601 far from the inside of the housing 1 is fixedly connected with a drain pipe 9 that penetrates and extends to the outside of the housing 1.

[0022] The surface of the bottom plate 4 is provided with a plurality of through holes 401. Both guiding blocks 6 are arranged obliquely downward, and the lowest ends of the two guiding blocks 6 are connected to the guiding groove 601. When the water droplets generated by defrosting fall on the bottom plate 4 and then fall into the guiding blocks 6 through the through holes 401, due to the two guiding blocks 6 being arranged obliquely downward, the water can be guided into the guiding groove 601 and finally discharged through the drain pipe 9, thereby preventing the water from eroding the bottom of the air source heat pump body 2.

[0023] A plurality of fixing seats 10 are fixedly connected to both the front and rear sides of the outer surface of the air source heat pump body 2. In the middle of one side of each fixing seat 10 away from the air source heat pump body 2, a first arc-shaped groove 1001 matching the coil pipe 5 is provided. One side of the fixing seat 10 away from the air source heat pump body 2 is connected with a docking seat 11. A clamping groove 1101 is provided on the side of the docking seat 11 close to the fixing seat 10, and the docking seat 11 is clamped to the outer surface of the docking seat 11 through the clamping groove 1101. A second arc-shaped groove 1102 corresponding to the first arc-shaped groove 1001 is provided in the middle of the inside of the clamping groove 1101. The outer surface of the coil pipe 5 is respectively attached to the inner walls of the first arc-shaped groove 1001 and the second arc-shaped groove 1102.

[0024] An activity groove 1103 is provided inside the upper end of the docking seat 11. A spring pin 12 that penetrates the activity groove 1103 and extends into the inside of the clamping groove 1101 is movably connected inside the activity groove 1103. A limit groove 1002 matching the spring pin 12 is provided at the upper end of the fixing seat 10, and one end of the spring pin 12 that penetrates and extends into the inside of the clamping groove 1101 is inserted into the limit groove 1002. A slider 13 is fixedly connected to the bottom end inside the clamping groove 1101. A sliding groove 1003 is provided at the bottom end of the fixing seat 10, and the slider 13 is slidably connected inside the sliding groove 1003.

[0025] By pulling the spring pin 12, one end of the spring pin 12 is disengaged from the insertion into the limit groove 1002, and then the docking seat 11 is pushed, so that the slider 13 slides along the sliding groove 1003 and moves towards the side away from the fixing seat 10, thereby separating the docking seat 11 from the fixing seat 10 and removing and replacing the coil pipe 5 from the outer surface of the air source heat pump body 2.

[0026] When the low-temperature air source heat pump defrosting device provided by the present utility model is in use, the water droplets generated by defrosting fall on the bottom plate 4 and then fall into the guiding blocks 6 through the through holes 401. Due to the two guiding blocks 6 being arranged obliquely downward, the water can be guided into the guiding groove 601 and finally discharged through the drain pipe 9, thereby preventing the water from eroding the bottom of the air source heat pump body 2.

[0027] When the coil pipe 5 needs to be disassembled and replaced, by pulling the spring pin 12, one end of the spring pin 12 is disengaged from the insertion connection with the limit groove 1002, and then the docking seat 11 is pushed, so that the slider 13 slides along the sliding groove 1003 and moves towards the side away from the fixed seat 10, so that the docking seat 11 can be separated from the fixed seat 10, and the coil pipe 5 can be removed and replaced from the outer surface of the air source heat pump body 2.

[0028] For those skilled in the art, the present utility model is not limited to the above embodiments. If various modifications or variations of the present utility model do not depart from the spirit and scope of the present utility model, and if these modifications and variations fall within the scope of the claims of the present utility model and equivalent technical scope, then the present utility model also intends to include these modifications and variations.

Claims

1. A super-low temperature air source heat pump defrosting device, comprising a housing (1), an air source heat pump body (2) and a compressor (3). The air source heat pump body (2) and the compressor (3) are both arranged inside the housing (1). One side of the upper end of the compressor (3) is connected with a tee (7), and both ends of the tee (7) are connected with a liquid distributor (8) through connecting pipes. It is characterized in that: A plurality of coils (5) are installed on the outer surface of the air source heat pump body (2). The coils (5) are distributed vertically and are respectively connected to two distributors (8) through connecting pipes. A bottom plate (4) is fixedly arranged near the bottom end inside the housing (1), and the air source heat pump body (2) and the compressor (3) are both arranged above the bottom plate (4). Guide blocks (6) are arranged on both sides below the bottom plate (4). A guide groove (601) is formed between the two guide blocks (6). One end of the guide groove (601) far from the inside of the housing (1) is fixedly connected to a drain pipe (9) that penetrates and extends to the outside of the housing (1).

2. The defrosting device for an ultra-low temperature air source heat pump according to claim 1, characterized in that: A plurality of fixing seats (10) are fixedly connected to the front and rear sides of the outer surface of the air source heat pump body (2). A first arc-shaped groove (1001) matching the coil (5) is formed in the middle of the side of each fixing seat (10) far from the air source heat pump body (2).

3. The defrosting device for an ultra-low temperature air source heat pump according to claim 2, characterized in that: A docking seat (11) is connected to the side of the fixing seat (10) far from the air source heat pump body (2). A clamping groove (1101) is formed in the side of the docking seat (11) close to the fixing seat (10), and the docking seat (11) is clamped to the outer surface of the docking seat (11) through the clamping groove (1101). A second arc-shaped groove (1102) corresponding to the first arc-shaped groove (1001) is formed in the middle of the inside of the clamping groove (1101). The outer surface of the coil (5) is respectively attached to the inner walls of the first arc-shaped groove (1001) and the second arc-shaped groove (1102).

4. A super-low temperature air source heat pump defrosting device according to claim 3, characterized in that: An activity groove (1103) is formed inside the upper end of the docking seat (11). A spring pin (12) that penetrates the activity groove (1103) and extends into the clamping groove (1101) is movably connected inside the activity groove (1103). A limiting groove (1002) matching the spring pin (12) is formed in the upper end of the fixing seat (10), and one end of the spring pin (12) that penetrates and extends into the clamping groove (1101) is inserted into the limiting groove (1002).

5. The defrosting device for an ultra-low temperature air source heat pump according to claim 3, characterized in that: A slider (13) is fixedly connected to the bottom end inside the clamping groove (1101). A sliding groove (1003) is formed in the bottom end of the fixing seat (10), and the slider (13) is slidably connected inside the sliding groove (1003).

6. The defrosting device for ultra-low temperature air source heat pump according to claim 1, characterized in that: A plurality of through holes (401) are formed in the surface of the bottom plate (4). The two guide blocks (6) are both arranged obliquely downward, and the lowest ends of the two guide blocks (6) are connected to the guide groove (601).

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