Defrosting device

Abstract

The utility model belongs to the technical field of air source heat pump defrosting, and particularly relates to a defrosting device which comprises a box body, a condenser is installed on a bottom plate of the box body, a first air guide plate, a second air guide plate, a third air guide plate and a fourth air guide plate are installed between a top plate and the bottom plate of the box body, a plurality of ventilation grooves are formed in the first air guide plate, and a plurality of air outlets are formed in the second air guide plate. A lifting frame is installed on the lifting block, a plurality of sealing plates are installed on the lifting frame, a push rod is installed on the electric telescopic rod, the push rod is fixedly connected with the lifting frame, air is continuously supplied into the box body only through operation of the draught fan, meanwhile, the sealing plates close ventilation grooves in first air guide plates, and at the moment, after air enters the box body from air inlet grooves, the air is conveyed to the box body; air enters the space between the third air guide plate and the fourth air guide plate along the first air guide plate and the second air guide plate, frost on the condenser is blown away by the air at the moment, the air speed is increased by reducing the sectional area of the air, and the defrosting efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of air source heat pump defrosting technology, specifically a defrosting device. Background Technology

[0002] An air source heat pump is a device that uses natural energy—air—for heating or cooling. When it is working, it has an evaporator and a condenser inside, which achieve heating or cooling operations through internal circulation. During the cooling or heating process of an air source heat pump, the condenser will frost, so a defrosting device is required.

[0003] Chinese patent application CN 119393953 A discloses a defrosting device for an air conditioner, including a bottom shell. A condenser is connected to the upper surface of the bottom shell, and a partition box is connected to the end of the bottom shell away from the condenser. A vertical shell is connected to the outer surface of the bottom shell. A support frame is connected to the inner surface of the condenser, and an axial flow heat dissipation mechanism is connected to one side of the support frame. The vertical shell has a heat dissipation port corresponding to the axial flow heat dissipation mechanism, and an air-guiding assembly is connected to the inner surface of the vertical shell, with the position of the air-guiding assembly corresponding to the heat dissipation port. This invention guides hot air from multiple directions to the condenser to accelerate all-round defrosting of the condenser.

[0004] Existing defrosting devices typically start a fan to continuously blow air away the frost on the condenser of an air source heat pump during the defrosting process. However, the large cross-sectional area inside an air source heat pump results in poor airflow and low defrosting efficiency. Therefore, a defrosting device is proposed to address the above problems. Utility Model Content

[0005] In order to overcome the shortcomings of the existing technology and solve the problems existing in the existing technology, this utility model proposes a defrosting device.

[0006] The technical solution adopted by this utility model to solve its technical problem is a defrosting device, including a housing. A condenser is installed on the bottom plate of the housing. A first air guide plate, a second air guide plate, a third air guide plate, and a fourth air guide plate are installed between the top plate and the bottom plate of the housing. The side walls of the first and second air guide plates are fixedly connected to the inner wall of the housing. The first and third air guide plates are fixedly connected, and the second and fourth air guide plates are fixedly connected. A heating plate is installed between the third and fourth air guide plates. Multiple ventilation slots are opened on the first air guide plate. Lifting slots are symmetrically opened on the side wall of the first air guide plate. Lifting blocks are assembled in the lifting slots, and lifting frames are installed on the lifting blocks. There are multiple sealing plates. An electric telescopic rod is fixedly installed on the side wall of the first air guide plate. A push rod is installed on the electric telescopic rod and fixedly connected to the lifting frame. By operating only the fan, air is continuously supplied into the box. At the same time, the operation of the electric telescopic rod is controlled by the control panel. The push rod on it moves vertically downward, which drives the lifting frame to move vertically downward. The lifting frame drives the multiple sealing plates on it to move vertically downward. The sealing plates close the ventilation slots on the first air guide plate. At this time, the air enters the box from the air inlet slot, and then enters between the third and fourth air guide plates along the first and second air guide plates. At this time, the air blows away the frost on the condenser. This structure increases the air velocity by reducing the cross-sectional area of ​​the air, which is beneficial to improving the defrosting efficiency.

[0007] Preferably, a control panel is installed on the side wall of the housing, and the control panel is connected to the heating plate via an internal circuit. The heating plate has a mesh structure. An air inlet slot is formed on one side wall of the housing, and an air outlet slot is formed on the other side wall. Filter screens are installed on the inner wall of the housing at the air inlet and outlet slots. A fan is fixedly installed on the inner wall of the housing. An evaporator is installed on the bottom plate of the housing, and the evaporator is connected to a compressor via a conduit. The compressor is installed on the bottom plate of the housing and is connected to a condenser via a conduit. Next, the condenser is equipped with an inlet pipe and an outlet pipe. The condenser is connected to an expansion valve via a conduit, and the expansion valve is connected to the evaporator via a conduit. The operation of the heating plate is controlled by a control panel. The heating plate has a grid structure. After the air enters the housing from the air inlet slot, it travels along the first and second air guide plates and enters between the third and fourth air guide plates. During this process, the air is heated into hot air by passing through the grid structure heating plate. The hot air then blows air onto the condenser, which removes the frost on the condenser and improves the defrosting effect.

[0008] The advantages of this utility model are:

[0009] 1. This utility model utilizes a fan-operated system to continuously supply air into the housing. Simultaneously, an electric telescopic rod is controlled via a control panel. The push rod on the rod moves vertically downward, causing the lifting frame to move vertically downward. The lifting frame then moves multiple sealing plates vertically downward, closing the ventilation slots on the first air guide plate. At this point, air enters the housing from the air inlet slot, travels along the first and second air guide plates, and then enters between the third and fourth air guide plates. This airflow blows away the frost on the condenser. This structure increases the airflow velocity by reducing the cross-sectional area of ​​the airflow, thus improving defrosting efficiency.

[0010] 2. This utility model controls the operation of the heating plate through the control panel. The heating plate has a grid structure. After the air enters the box from the air inlet slot, it goes along the first and second air guide plates and enters between the third and fourth air guide plates. During this process, the air is heated into hot air by passing through the grid structure heating plate. Then the hot air blows on the condenser, which realizes that the hot air blows away the frost on the condenser, which is beneficial to improving the defrosting effect. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a first-person perspective 3D structural diagram;

[0013] Figure 2 This is a schematic diagram of the three-dimensional structure of the air guide plate.

[0014] Figure 3 This is a schematic diagram of the three-dimensional structure of the first air guide plate;

[0015] Figure 4 This is a schematic diagram of the internal three-dimensional structure of the box;

[0016] Figure 5 This is a schematic diagram of the three-dimensional structure in a side view.

[0017] In the diagram: 1. Housing; 2. Control panel; 3. Air inlet duct; 4. Air outlet duct; 5. Filter screen; 6. Condenser; 7. First air guide plate; 8. Second air guide plate; 9. Third air guide plate; 10. Fourth air guide plate; 11. Ventilation duct; 12. Lifting duct; 13. Lifting block; 14. Lifting frame; 15. Sealing plate; 16. Electric telescopic rod; 17. Push rod; 18. Fan; 19. Evaporator; 20. Compressor; 21. Expansion valve; 22. Water inlet pipe; 23. Water outlet pipe; 24. Heating plate. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0019] Please see Figures 1-3 As shown, a defrosting device includes a housing 1. A condenser 6 is installed on the bottom plate of the housing 1. A first air guide plate 7, a second air guide plate 8, a third air guide plate 9, and a fourth air guide plate 10 are installed between the top plate and the bottom plate of the housing 1. The side walls of the first air guide plate 7 and the second air guide plate 8 are fixedly connected to the inner wall of the housing 1. The first air guide plate 7 and the third air guide plate 9 are fixedly connected. The second air guide plate 8 and the fourth air guide plate 10 are fixedly connected. A heating plate 24 is installed between the third air guide plate 9 and the fourth air guide plate 10. Multiple ventilation slots 11 are formed on the first air guide plate 7. Symmetrical lifting slots 12 are provided on the side wall of the first air guide plate 7. Lifting blocks 13 are installed in the lifting slots 12, and lifting frames 14 are installed on the lifting blocks 13. Multiple sealing plates 15 are installed on the lifting frames 14. An electric telescopic rod 16 is fixedly installed on the side wall of the first air guide plate 7. A push rod 17 is installed on the electric telescopic rod 16 and is fixedly connected to the lifting frame 14. During operation, existing defrosting devices usually start the fan 18 to continuously blow air away the frost on the condenser 6 of the air source heat pump during defrosting. However, the internal condenser of the air source heat pump... The large area results in poor airflow and low defrosting efficiency. The compressor 20 (model WHP32900AEKTQ9JK), condenser 6 (model FN-36), expansion valve 21 (model DF1.3-4.0c), and evaporator 19 (model JY-02) work together to compress the low-temperature, low-pressure gaseous refrigerant into a high-temperature, high-pressure gas. This gas then enters the condenser 6 through a conduit. Inside the condenser 6, the high-temperature, high-pressure refrigerant releases heat and condenses into a high-pressure liquid state, which is then released through the water inlet pipe. The cold water entering through pipe 22 absorbs heat, and then the hot water is discharged from pipe 23. After that, the high-pressure liquid refrigerant enters the expansion valve 21 through the conduit. The expansion valve 21 throttles and reduces the pressure of the high-pressure liquid refrigerant, turning it into a low-temperature, low-pressure liquid-gas mixture. Finally, the liquid-gas mixture enters the evaporator 19 through the conduit. At the same time, the fan 18 operates, and outside air continuously enters from the air inlet slot 3 and is discharged from the air outlet slot 4. The refrigerant in the evaporator 19 absorbs heat from the air and evaporates into a low-temperature, low-pressure gas, completing the heat absorption process and realizing the operation of the air source heat pump.

[0020] After the condenser 6 has been operating for a period of time, frost will appear. During the defrosting process, the evaporator 19, compressor 20, condenser 6 and expansion valve 21 are shut off, and only the fan 18 operates, continuously supplying air into the housing 1. At the same time, the electric telescopic rod 16 is controlled by the control panel 2, and the push rod 17 on it moves vertically downward. The push rod 17 drives the lifting frame 14 to move vertically downward, and the lifting frame 14 drives the multiple sealing plates 15 on it to move vertically downward. The sealing plates 15 close the ventilation slots 11 on the first air guide plate 7. At this time, the air enters the housing 1 from the air inlet slot 3, and then enters between the third air guide plate 9 and the fourth air guide plate 10 along the first air guide plate 7 and the second air guide plate 8. At this time, the air blows away the frost on the condenser 6. This structure increases the air velocity by reducing the cross-sectional area of ​​the air, which is beneficial to improving the defrosting efficiency.

[0021] Please see Figures 4-5 As shown, a control panel 2 is installed on the side wall of the housing 1. The control panel 2 is connected to the heating plate 24 via an internal circuit. The heating plate 24 has a mesh structure. An air inlet slot 3 is provided on one side wall of the housing 1, and an air outlet slot 4 is provided on the other side wall. A filter screen 5 is installed on the inner wall of the housing 1 at the air inlet slot 3 and the air outlet slot 4. A fan 18 is fixedly installed on the inner wall of the housing 1. An evaporator 19 is installed on the bottom plate of the housing 1. The evaporator 19 is connected to a compressor 20 via a conduit. The compressor 20 is installed on the bottom plate of the housing 1 and is connected to a condenser 6 via a conduit. A water inlet pipe 22 and a water outlet pipe 23 are installed on the condenser 6. An expansion valve 21 is connected to the condenser 6 via a conduit. 1. Connected to the evaporator 19 via a conduit; During operation, existing defrosting devices typically use outside air to blow away the frost on the condenser 6 of the air source heat pump during defrosting. Due to the inability to control the stability of the outside air, the defrosting effect is poor. The operation of the heating plate 24 is controlled by the control panel 2. The heating plate 24 has a grid structure. After the air enters the housing 1 from the air inlet slot 3, it travels along the first air guide plate 7 and the second air guide plate 8, and enters between the third air guide plate 9 and the fourth air guide plate 10. During this process, the air is heated into hot air by passing through the grid structure heating plate 24. The hot air then blows onto the condenser 6, thus blowing away the frost on the condenser 6 and improving the defrosting effect.

[0022] Working principle: Existing defrosting devices typically start the fan 18 to continuously blow air away the frost on the condenser 6 of an air source heat pump during defrosting. However, the large cross-sectional area inside the air source heat pump results in poor airflow and low defrosting efficiency. The compressor 20 (model WHP32900AEKTQ9JK), condenser 6 (model FN-36), expansion valve 21 (model DF1.3-4.0c), and evaporator 19 (model JY-02) compress the low-temperature, low-pressure gaseous refrigerant into a high-temperature, high-pressure gas. This high-temperature, high-pressure gas then enters the condenser 6 through a conduit, where it enters at high temperature and pressure. The refrigerant releases heat and condenses into a high-pressure liquid state. Cold water entering through inlet pipe 22 absorbs this heat, and hot water is then discharged from outlet pipe 23. The high-pressure liquid refrigerant then enters expansion valve 21 through a conduit. Expansion valve 21 throttles and reduces the pressure of the high-pressure liquid refrigerant, transforming it into a low-temperature, low-pressure liquid-gas mixture. Finally, this liquid-gas mixture enters evaporator 19 through a conduit. Simultaneously, fan 18 operates, continuously drawing in outside air through inlet slot 3 and expelling it through exhaust slot 4. Inside evaporator 19, the refrigerant absorbs heat from the air and evaporates into a low-temperature, low-pressure gas, completing the heat absorption process and realizing the operation of the air source heat pump. After the condenser 6 has been operating for a period of time, frost will appear. During the frost process, the evaporator 19, compressor 20, condenser 6, and expansion valve 21 are shut off, with only the fan 18 operating, continuously supplying air into the housing 1. Simultaneously, the electric telescopic rod 16 is controlled via the control panel 2, causing its push rod 17 to move vertically downwards. The push rod 17 drives the lifting frame 14 to move vertically downwards, which in turn drives multiple sealing plates 15 to move vertically downwards. The sealing plates 15 close the ventilation slots 11 on the first air guide plate 7. At this point, air enters the housing 1 from the air inlet slot 3, travels along the first and second air guide plates 7 and 8, and then enters between the third and fourth air guide plates 9 and 10. This airflow blows away the frost on the condenser 6. This structure achieves airflow by reducing the cross-sectional area of ​​the airflow. The increased speed is beneficial to improving defrosting efficiency. Existing defrosting devices typically use outside air to blow away the frost on the condenser 6 of an air source heat pump during defrosting. However, due to the inability to control the stability of the outside air, the defrosting effect is poor. The operation of the heating plate 24 is controlled by the control panel 2. The heating plate 24 has a grid structure. After the air enters the housing 1 from the air inlet slot 3, it travels along the first air guide plate 7 and the second air guide plate 8, and then enters between the third air guide plate 9 and the fourth air guide plate 10. During this process, the air is heated into hot air by passing through the grid structure heating plate 24. The hot air then blows onto the condenser 6, thus blowing away the frost on the condenser 6 and improving the defrosting effect.

[0023] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A defrosting device, characterized in that: The enclosure includes a housing (1), on which a condenser (6) is mounted. A first air guide plate (7), a second air guide plate (8), a third air guide plate (9), and a fourth air guide plate (10) are installed between the top and bottom plates of the housing (1). The side walls of the first air guide plate (7) and the second air guide plate (8) are fixedly connected to the inner wall of the housing (1). The first air guide plate (7) and the third air guide plate (9) are fixedly connected, and the second air guide plate (8) and the fourth air guide plate (10) are fixedly connected. A heating element is installed between the third air guide plate (9) and the fourth air guide plate (10). The hot plate (24) has multiple ventilation slots (11) on the first air guide plate (7), and lifting slots (12) are symmetrically provided on the side wall of the first air guide plate (7). Lifting blocks (13) are installed in the lifting slots (12), and lifting frames (14) are installed on the lifting blocks (13). Multiple sealing plates (15) are installed on the lifting frames (14). An electric telescopic rod (16) is fixedly installed on the side wall of the first air guide plate (7), and a push rod (17) is installed on the electric telescopic rod (16). The push rod (17) is fixedly connected to the lifting frame (14).

2. The defrosting device according to claim 1, characterized in that: A control panel (2) is installed on the side wall of the housing (1). The control panel (2) is connected to the heating plate (24) through an internal circuit. The heating plate (24) has a mesh structure.

3. The defrosting device according to claim 1, characterized in that: An air inlet slot (3) is provided on one side wall of the box (1), and an air outlet slot (4) is provided on the other side wall of the box (1). A filter screen (5) is installed on the inner wall of the box (1) at the air inlet slot (3) and the air outlet slot (4).

4. A defrosting device according to claim 1, characterized in that: A fan (18) is fixedly installed on the inner wall of the housing (1), and an evaporator (19) is installed on the bottom plate of the housing (1). The evaporator (19) is connected to a compressor (20) through a conduit.

5. A defrosting device according to claim 4, characterized in that: The compressor (20) is installed on the bottom plate of the housing (1). The compressor (20) is connected to the condenser (6) through a conduit. The condenser (6) is equipped with an inlet pipe (22) and an outlet pipe (23).

6. A defrosting device according to claim 1, characterized in that: The condenser (6) is connected to an expansion valve (21) via a conduit, and the expansion valve (21) is connected to the evaporator (19) via a conduit.

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