Air source heat pump defrosting device

Abstract

The utility model discloses a defrosting device of an air source heat pump, which relates to the technical field of air source heat pumps and comprises an air source heat pump main body, a connecting frame is arranged at the side end of the air source heat pump main body, an evaporator is connected in the connecting frame, a defrosting mechanism is arranged at the side end of the air source heat pump main body, and the defrosting mechanism comprises a defrosting box, a defrosting air inlet and a defrosting air outlet. The defrosting box is connected to the lower end of the connecting frame, the partition plate is connected to the interior of the defrosting box and vertically divides the defrosting box into a heating channel and an air guide channel, the heating channel communicates with the lower end of the air guide channel, and the moving frame is slidably connected into the connecting frame. According to the air source heat pump, the air source heat pump main body can be kept to work continuously while the evaporator is defrosted, although the air source heat pump can influence the heating efficiency of the air source heat pump, compared with the traditional situation that heating cannot be conducted during reverse circulation defrosting and heat pump demisting, the air source heat pump has the advantages that the influence is small, and the indoor temperature cannot fluctuate greatly.

Description

Technical Field

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

[0002] An air source heat pump is an energy-saving device that uses high-grade energy to move heat from a low-grade heat source (air) to a high-grade heat source. It works by having components such as a compressor and evaporator work together to absorb heat from the surrounding air and transfer it to a medium to achieve the purpose of heating.

[0003] In cold weather, the evaporator surface of an air source heat pump is prone to frost buildup. Traditional defrosting methods, such as reverse circulation defrosting, often take a long time, which affects the heating efficiency of the heat pump. For example, when the frost on the evaporator surface reaches a certain thickness, reverse circulation defrosting takes a long time to remove the frost layer. During this period, the heat pump cannot heat normally, and the indoor temperature will drop significantly.

[0004] To address these issues, we offer an air-source heat pump defrosting device. Utility Model Content

[0005] Technical problems to be solved

[0006] This utility model proposes an air source heat pump defrosting device, which solves the problems of slow defrosting efficiency and inability of the heat pump to heat during defrosting by the cooperation between the connecting frame and the defrosting mechanism.

[0007] Technical Solution: To achieve the above objectives, this utility model provides the following technical solution: an air source heat pump defrosting device, comprising an air source heat pump body, a connecting frame provided on the side of the air source heat pump body, an evaporator connected within the connecting frame, and a defrosting mechanism provided on the side of the air source heat pump body, the defrosting mechanism comprising:

[0008] A defrosting box, which is connected to the lower end of the connecting frame;

[0009] A partition plate is connected inside the defrosting box, which vertically divides the defrosting box into a heating channel and an air guide channel, with the lower ends of the heating channel and the air guide channel connected.

[0010] A movable frame is slidably connected to a connecting frame. The lower end of the movable frame is located inside an air duct, and the upper end of the movable frame is provided with a horizontally arranged air outlet. A ventilation slot is provided inside the movable frame.

[0011] The defrosting box has an air inlet on its side, and the fan is located inside the air inlet. A heating plate is connected inside the defrosting box, and the heat-generating end of the heating plate is located inside the heating channel. A PTC heating element is installed inside the heating plate.

[0012] Furthermore, the air source heat pump body includes components such as a compressor, condenser, and expansion valve. The evaporator is connected to the air source heat pump body via a pipe located at the side end of the air source heat pump body.

[0013] Furthermore, protective mesh covers are provided at the air inlets on both the side of the connecting frame and the side of the defrosting box.

[0014] Furthermore, the movable frame is located inside the evaporator, with the air outlet facing the evaporator, and a bottom frame is connected to the lower end of the movable frame, which is located inside the air guide channel.

[0015] Furthermore, a rectangular slot is provided on the side of the bottom frame, and movable blocks are connected to both sides of the bottom frame, with threaded grooves provided inside the movable blocks.

[0016] Furthermore, the defrosting mechanism also includes a threaded rod, which is rotatably connected inside the defrosting box and threadedly connected inside the moving block.

[0017] Furthermore, the defrosting mechanism also includes a drive motor, which is connected to the lower end of the defrosting box, with its drive end rotatably connected inside the defrosting box, and the drive end of the drive motor is connected to a threaded rod.

[0018] Beneficial effects:

[0019] Compared with existing technologies, this air source heat pump defrosting device has the following advantages:

[0020] 1. This air source heat pump defrosting device, equipped with a heating plate and a fan, generates hot air in the defrosting box. The hot air enters the moving frame through the air duct and is then blown onto the evaporator from the air outlet, thus heating and defrosting it. The high temperature of the hot air quickly melts the frost layer on the evaporator, reducing defrosting time and improving the overall operating efficiency of the air source heat pump. By opening ventilation slots in the moving frame, when defrosting the evaporator at the air outlet, the outside airflow that is not blocked by the air outlet can still enter the air source heat pump body through the ventilation slots, allowing it to continue working. Although this will affect the heating efficiency of the air source heat pump, the impact is smaller compared to the traditional reverse circulation defrosting method, where the heat pump cannot heat during demisting, thus preventing large fluctuations in indoor temperature.

[0021] Second, this air source heat pump defrosting device is equipped with a moving block and a threaded rod. When the drive motor is started, it will drive the threaded rod to rotate. The rotation of the threaded rod and the action of the moving block will enable the moving frame to move up and down. This allows the air outlet to move up and down repeatedly on the side of the evaporator, ensuring that the frost layer on the evaporator surface is completely and evenly removed, thus improving the defrosting effect. Attached Figure Description

[0022] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0023] Figure 1 This is a schematic diagram of the overall structure of the air source heat pump defrosting device of this utility model;

[0024] Figure 2 This is a schematic diagram of the movable frame structure of the air source heat pump defrosting device of this utility model;

[0025] Figure 3 This is a schematic diagram of the side structure of the air source heat pump defrosting device of this utility model;

[0026] Figure 4 This is a cross-sectional structural diagram of the air source heat pump defrosting device of this utility model.

[0027] In the diagram: 1. Air source heat pump body; 2. Connecting frame; 3. Evaporator; 4. Defrosting box; 5. Partition plate; 6. Heating channel; 7. Air duct; 8. Moving frame; 9. Air outlet; 10. Ventilation slot; 11. Fan; 12. Heating plate; 13. Bottom frame; 14. Moving block; 15. Threaded rod; 16. Drive motor. Detailed Implementation

[0028] 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 protection scope of the present utility model.

[0029] like Figure 1-4 As shown, this utility model provides a technical solution: an air source heat pump defrosting device, including an air source heat pump body 1, a connecting frame 2 is provided on the side of the air source heat pump body 1, an evaporator 3 is connected in the connecting frame 2, the connecting frame 2 is used to support and fix the evaporator 3, the air source heat pump body 1 includes components such as a compressor, condenser, and expansion valve, and a temperature sensor and controller are provided in the air source heat pump body 1.

[0030] A defrosting mechanism is provided on the side of the air source heat pump body 1. The defrosting mechanism is used to defrost the evaporator 3. The defrosting mechanism includes: a defrosting box 4, a partition plate 5, a movable frame 8, and a fan 11. The defrosting box 4 is connected to the lower end of the connecting frame 2, and its side end is connected to the air source heat pump body 1. The partition plate 5 is connected inside the defrosting box 4, which vertically divides the defrosting box into a heating channel 6 and an air guide channel 7. The lower ends of the heating channel 6 and the air guide channel 7 are connected. The side end of the heating channel 6 is set as the air inlet of the defrosting box 4. The movable frame 8 is slidably connected inside the connecting frame 2. The lower end of the movable frame 8 is located inside the air guide channel 7, so that the hot air in the air guide channel 7 will enter the movable frame 8. A horizontally positioned air outlet 9 is provided at the upper end of the frame 8. The movable frame 8 is located inside the evaporator 3, with the air outlet 9 facing the evaporator 3. Hot air in the air guide duct 7 will be discharged from the air outlet 9 through the movable frame 8, thereby blowing hot air onto the evaporator 3 to defrost it. A ventilation slot 10 is provided inside the movable frame 8, which allows outside air to enter the air source heat pump body 1. The fan 11 is located inside the air inlet, with the air outlet of the fan 11 facing into the defrost box 4. A heating plate 12 is connected inside the defrost box 4, with the heat-generating end of the heating plate 12 located inside the heating channel 6. The heating plate 12 is equipped with a PTC heating element, which has high heating efficiency.

[0031] The lower end of the movable frame 8 is connected to a bottom frame 13, which is located inside the air duct 7. A rectangular slot is provided on the side of the bottom frame 13 to facilitate the airflow in the air duct 7 to enter the bottom frame 13. Movable blocks 14 are connected to both sides of the bottom frame 13. Threaded grooves are provided in the movable blocks 14. The defrosting mechanism also includes a threaded rod 15, which is rotatably connected inside the defrosting box 4 and threadedly connected to the movable blocks 14. The defrosting mechanism also includes a drive motor 16, which is connected to the lower end of the defrosting box 4 for installation and fixation. Its drive end is rotatably connected inside the defrosting box 4. The drive end of the drive motor 16 is connected to the threaded rod 15. When the drive motor 16 is started, it will drive the threaded rod 15 to rotate. The rotation of the threaded rod 15 interacts with the movable blocks 14, which will drive the movable frame 8 to move up and down.

[0032] The evaporator 3 is connected to the air source heat pump body 1 by a pipe located on the side of the air source heat pump body 1 so as not to obstruct the movement of the movable frame 8. Protective mesh covers are provided at the air inlets on the side of the connecting frame 2 and the side of the defrost box 4.

[0033] Working principle: When the fan 11 starts, it blows air into the defrosting box 4. This airflow enters the heating channel 6, and the heating plate 12 starts to generate heat, thereby heating the airflow into hot air and turning it into hot air. The hot airflow enters the air guide channel 7, then moves upward, and enters the moving frame 8 through the bottom frame 13. Finally, the hot air is blown from the air outlet 9 to the evaporator 3 to heat and defrost it. During this period, the drive motor 16 starts and drives the threaded rod 15 to rotate. The rotation of the threaded rod 15 interacts with the moving block 14, which drives the moving frame 8 to move within the connecting frame 2, thereby ensuring that the frost layer on the surface of the evaporator 3 is completely and evenly removed. During defrosting, the outside airflow can enter the air source heat pump body 1 normally through the ventilation slot 10, so that it can operate normally and ensure that the indoor temperature does not fluctuate greatly.

[0034] 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.

[0035] 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. An air source heat pump defrosting device, comprising an air source heat pump body (1), characterized in that: The air source heat pump body (1) is provided with a connecting frame (2) on its side, and an evaporator (3) is connected inside the connecting frame (2). The air source heat pump body (1) is provided with a defrosting mechanism, which includes: Defrosting box (4), the defrosting box (4) is connected to the lower end of the connecting frame (2); A partition plate (5) is connected inside the defrosting box (4), which vertically divides the defrosting box into a heating channel (6) and an air guide channel (7), wherein the lower ends of the heating channel (6) and the air guide channel (7) are connected. The movable frame (8) is slidably connected to the connecting frame (2). The lower end of the movable frame (8) is located in the air guide channel (7). The upper end of the movable frame (8) is provided with a horizontally arranged air outlet (9). The movable frame (8) is provided with a ventilation slot (10). The defrost box (4) has an air inlet on its side and the fan (11) is located inside the air inlet. The defrost box (4) is connected to a heating plate (12). The heat-generating end of the heating plate (12) is located inside the heating channel (6). The heating plate (12) is equipped with a PTC heating element.

2. The air source heat pump defrosting device according to claim 1, characterized in that: The air source heat pump body (1) includes a compressor, a condenser, and an expansion valve. The evaporator (3) is connected to the air source heat pump body (1) by a pipe located at the side of the air source heat pump body (1).

3. The air source heat pump defrosting device according to claim 1, characterized in that: Protective mesh covers are provided at the side inlets of the connecting frame (2) and the defrosting box (4).

4. The air source heat pump defrosting device according to claim 1, characterized in that: The movable frame (8) is located inside the evaporator (3), and the air outlet (9) faces the evaporator (3). The lower end of the movable frame (8) is connected to a bottom frame (13), which is located inside the air guide channel (7).

5. The air source heat pump defrosting device according to claim 4, characterized in that: The bottom frame (13) has a rectangular slot on its side, and the bottom frame (13) has a movable block (14) connected to both sides. The movable block (14) has a threaded groove.

6. The air source heat pump defrosting device according to claim 5, characterized in that: The defrosting mechanism also includes a threaded rod (15), which is rotatably connected inside the defrosting box (4) and threadedly connected inside the moving block (14).

7. The air source heat pump defrosting device according to claim 6, characterized in that: The defrosting mechanism also includes a drive motor (16), which is connected to the lower end of the defrosting box (4), and its drive end is rotatably connected inside the defrosting box (4). The drive end of the drive motor (16) is connected to the threaded rod (15).

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