Heat pump unit anti-overload protection device

Abstract

This utility model discloses an overload protection device for heat pump units, belonging to the technical field of heat pump units. It includes a unit body, a protective shell fixedly connected to the outside of the unit body, an overload protector fixedly connected to the outside of the unit body, a sealing structure inside the protective shell, a display screen on one side of the overload protector, a guide rod rotatably connected inside the overload protector, a button fixedly connected to the outer surface of the guide rod, a sliding groove inside the overload protector, and an adjustment structure outside the guide rod. This utility model, by setting up an overload protector, adjustment structure, button, and guide rod, enables the button to achieve remote reset through the cooperation of a contactor, reflector, gear, and toothed plate. This not only improves equipment safety and response speed but also promotes the upgrade of heat pump systems to a smart operation and maintenance mode, thereby reducing subsequent operation procedures and ensuring the operating efficiency of the unit body.

Description

Technical Field

[0001] This utility model relates to the field of heat pump unit technology, specifically to an overload protection device for heat pump units. Background Technology

[0002] Against the backdrop of global energy transition and the "dual carbon" goal, efficient and clean energy utilization technologies have become the core driving force for promoting sustainable social development. Heat pump units, as an advanced energy device integrating heating, cooling, and hot water supply functions, are increasingly favored by the market. They cleverly utilize the reverse Carnot cycle principle, consuming a small amount of high-grade electricity to transfer ubiquitous low-grade heat energy from the environment to spaces or water requiring heating, achieving energy "transfer" rather than "creation." Compared to traditional resistance electric heating or fossil fuel boilers, heat pump units typically have a coefficient of performance (COP) of over 3.0, meaning that consuming 1 kWh of electricity can generate more than 3 kWh of heat. Their energy-saving effect is significant, not only greatly reducing users' energy bills but also effectively reducing carbon emissions, making a significant contribution to improving environmental quality, just like any other energy-efficient system. Like other industrial equipment, the efficient and stable operation of a heat pump unit relies on comprehensive protection of its core components. The compressor, the heart of the unit, needs to handle the compression and circulation of refrigerant during operation, with operating pressure and temperature at relatively high levels. In addition, the unit's control system, expansion valve, fan motor, and other electrical and mechanical components are also operating under high load for extended periods. When the grid voltage is unstable, refrigerant leaks, heat dissipation is poor, or the external ambient temperature is abnormally extreme, current surges and temperature spikes can easily occur, resulting in an "overload" phenomenon. Once an overload occurs, it may force the unit to shut down for protection, affecting the user experience; in severe cases, it may directly burn out expensive core components such as the compressor and controller, causing huge economic losses and severely shortening the equipment's lifespan. Therefore, a sensitive and reliable protection mechanism is the "lifeline" for ensuring the safe and long-term operation of the heat pump unit.

[0003] Among the many protection mechanisms, protection against electrical and thermal overloads is particularly critical. Electrical overload usually refers to the current flowing through the circuit exceeding the rated value of the equipment or line. Its main causes include abnormal power supply voltage, motor stall, or excessive load. Thermal overload focuses on monitoring the temperature of critical parts of the equipment. When the rate of heat generation exceeds the rate of heat dissipation, the temperature will continue to rise. This is often a direct consequence of electrical overload, but it may also be a manifestation of mechanical problems such as poor ventilation or poor lubrication. To deal with these potential risks, modern heat pump units generally integrate advanced thermal overload protection devices. When abnormal current or temperature is detected, the protection device will respond quickly by cutting off the power supply or sending a shutdown command to the control system to force the unit to stop running, thereby avoiding catastrophic damage accidents.

[0004] However, most protection devices do not have remote reset functionality. When the heat pump unit is overhauled or inspected, the protection device needs to be manually activated, which not only increases the subsequent operation procedures but also affects the operating efficiency of the heat pump unit. Utility Model Content

[0005] The purpose of this utility model is to provide an overload protection device for heat pump units to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an overload protection device for a heat pump unit, comprising a unit body, a protective shell fixedly connected to the outside of the unit body, an overload protector fixedly connected to the outside of the unit body, a sealing structure inside the protective shell, a display screen on one side of the overload protector, a guide rod rotatably connected inside the overload protector, a button fixedly connected to the outer surface of the guide rod, a groove inside the overload protector, an adjustment structure outside the guide rod, the adjustment structure slidably connected to the groove, the adjustment structure being connected to the overload protector, the adjustment structure including a telescopic device, a chip plate, a toothed plate, and a gear, a slider fixedly connected to one side of the toothed plate, a contactor fixedly connected above the slider, and a reflector connected to one end of the telescopic device.

[0007] As a further preferred embodiment of this technical solution, the overload protector is sleeved inside the protective shell, the button is rotatably connected inside the overload protector, and the telescopic device is fixedly connected outside the overload protector.

[0008] As a further preferred embodiment of this technical solution, the chip board is fixedly connected to the outside of the telescopic device, the chip board is fixedly connected to the outside of the overload protector, and the gear is fixedly connected to the outside of the guide rod.

[0009] As a further preferred embodiment of this technical solution, the slider is slidably connected in the groove, the toothed plate meshes with the gear, and the contactor overlaps with the reflector.

[0010] As a further preferred embodiment of this technical solution, the sealing structure includes a first rotating shaft, a second rotating shaft, and a motor. The first rotating shaft is rotatably connected inside the protective shell, the second rotating shaft is rotatably connected inside the protective shell, and a first sealing plate is externally connected to the first rotating shaft.

[0011] As a further preferred embodiment of this technical solution, the second rotating shaft is externally connected to a second sealing plate, and the motor is fixedly connected to the outside of the protective shell.

[0012] As a further preferred embodiment of this technical solution, the output shaft of the motor is connected to a first rotating shaft, the first rotating shaft is externally connected to an anti-slip belt, and the first rotating shaft is connected to a second rotating shaft through the anti-slip belt.

[0013] This utility model provides an overload protection device for heat pump units, which has the following beneficial effects:

[0014] (1) This utility model, by setting an overload protector, adjustment structure, button and guide rod, when an overload occurs and an emergency stop is required, the button will flip inside the overload protector, and the contactor above the slider will contact the reflector. When the unit body is overhauled, the external controller will apply a command to the chip board, and the telescopic device will apply a pushing force to the slider, and the slider will slide in the groove. Since the toothed plate and the gear mesh, the gear will drive the button to reset as the toothed plate moves. This protection device, through the cooperation between the contactor, reflector, gear and toothed plate, enables the button to achieve remote reset function, which not only improves the safety and response speed of the equipment, but also promotes the upgrade of the heat pump system to the intelligent operation and maintenance mode, thereby reducing the subsequent operation procedures and ensuring the operating efficiency of the unit body.

[0015] (2) This utility model sets up a protective shell and a sealing structure. The motor drives the first rotating shaft to rotate. Since the first rotating shaft is connected to the second rotating shaft through an anti-slip strip, the first sealing plate and the second sealing plate will rotate synchronously inside the protective shell. After the first sealing plate and the second sealing plate are closed, they will seal the protective shell, thereby providing a certain degree of antifreeze treatment for the overload protector and preventing the overload protector from short circuits due to low surface temperature. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a three-dimensional cross-sectional structural diagram of the protective shell of this utility model;

[0018] Figure 3 This is a three-dimensional structural diagram of the adjustment structure of this utility model;

[0019] Figure 4 This is a three-dimensional structural diagram of the sealing structure of this utility model.

[0020] In the diagram: 1. Generator unit body; 2. Protective shell; 3. Overload protector; 4. Sealing structure; 401. Shaft 1; 402. Shaft 2; 403. Sealing plate 1; 404. Sealing plate 2; 405. Motor; 406. Anti-slip strip; 5. Adjustment structure; 501. Expansion joint; 502. Chip board; 503. Gear plate; 504. Slider; 505. Contactor; 506. Reflector; 507. Gear; 6. Slide groove; 7. Display screen; 8. Button; 9. Guide rod. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0022] This utility model provides a technical solution: such as Figure 1 and Figure 4 As shown in this embodiment, a heat pump unit overload protection device includes a unit body 1, a protective shell 2 fixedly connected to the outside of the unit body 1, an overload protector 3 fixedly connected to the outside of the unit body 1, a sealing structure 4 provided inside the protective shell 2, a display screen 7 provided on one side of the overload protector 3, a guide rod 9 rotatably connected inside the overload protector 3, a button 8 fixedly connected to the outer surface of the guide rod 9, a sliding groove 6 provided inside the overload protector 3, an adjustment structure 5 provided outside the guide rod 9, the adjustment structure 5 slidably connected in the sliding groove 6, the adjustment structure 5 connected to the overload protector 3, the adjustment structure 5 includes a telescopic device 501, a chip plate 502, a toothed plate 503 and a gear 507, a slider 504 fixedly connected to one side of the toothed plate 503, a contactor 505 fixedly connected above the slider 504, and a reflector 506 connected to one end of the telescopic device 501.

[0023] like Figure 1 and Figure 3 As shown, the overload protector 3 is sleeved inside the protective shell 2, the button 8 is rotatably connected inside the overload protector 3, the telescopic device 501 is fixedly connected outside the overload protector 3, the chip board 502 is fixedly connected outside the telescopic device 501, the chip board 502 is fixedly connected outside the overload protector 3, the gear 507 is fixedly connected outside the guide rod 9, the slider 504 is slidably connected inside the slide groove 6, the toothed plate 503 meshes with the gear 507, and the contactor 505 overlaps with the reflector 506.

[0024] By setting the slide groove 6, when the telescopic device 501 applies a pushing force to the slider 504, the slider 504 will slide in the slide groove 6, so that the slide groove 6 plays a certain guiding role in the movement of the toothed plate 503, avoiding the phenomenon of the toothed plate 503 shifting its position when moving, thereby ensuring the stability of the button 8 reset and avoiding the phenomenon of the button 8 being bumped when reset.

[0025] like Figure 4 As shown, the sealing structure 4 includes a first rotating shaft 401, a second rotating shaft 402, and a motor 405. The first rotating shaft 401 is rotatably connected inside the protective shell 2, and the second rotating shaft 402 is rotatably connected inside the protective shell 2. A first sealing plate 403 is connected to the outside of the first rotating shaft 401, and a second sealing plate 404 is connected to the outside of the second rotating shaft 402. The motor 405 is fixedly connected to the outside of the protective shell 2. The output shaft of the motor 405 is connected to the first rotating shaft 401. An anti-slip belt 406 is connected to the outside of the first rotating shaft 401. The first rotating shaft 401 is connected to the second rotating shaft 402 through the anti-slip belt 406.

[0026] By setting an anti-slip strip 406, the motor 405 drives the rotating shaft 401 to rotate. Since the rotating shaft 401 is connected to the rotating shaft 402 through the anti-slip strip 406, the sealing plate 403 and the sealing plate 404 will rotate synchronously inside the protective shell 2, so that the sealing plate 403 and the sealing plate 404 can seal the protective shell 2, preventing cold air from entering the protective shell 2 and ensuring the stability of the internal temperature of the protective shell 2.

[0027] This utility model provides an overload protection device for heat pump units, the specific working principle of which is as follows:

[0028] When the protection device is in use, when an overload occurs and an emergency stop is initiated, button 8 will flip inside the overload protector 3, and the contactor 505 above slider 504 will contact reflector 506. When the unit body 1 is repaired, the external controller applies a command to chip board 502, and telescopic device 501 applies a pushing force to slider 504, which will slide in slide groove 6. Since toothed plate 503 meshes with gear 507, gear 507 will drive button 8 to return to its original position as toothed plate 503 moves.

[0029] When encountering cold weather, the motor 405 drives the rotating shaft 401 to rotate. Since the rotating shaft 401 is connected to the rotating shaft 402 through the anti-slip strip 406, the sealing plate 403 and the sealing plate 404 will rotate synchronously inside the protective shell 2. After the sealing plate 403 and the sealing plate 404 are closed, they will seal the protective shell 2.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An overload protection device for a heat pump unit, comprising a unit body (1), characterized in that: The unit body (1) is fixedly connected to a protective shell (2). An overload protector (3) is fixedly connected to the unit body (1). A sealing structure (4) is provided inside the protective shell (2). A display screen (7) is provided on one side of the overload protector (3). A guide rod (9) is rotatably connected inside the overload protector (3). A button (8) is fixedly connected to the outer surface of the guide rod (9). A sliding groove (6) is opened inside the overload protector (3). An adjustment structure is provided outside the guide rod (9). 5) The adjustment structure (5) is slidably connected in the slide groove (6). The adjustment structure (5) is connected to the overload protector (3). The adjustment structure (5) includes a telescopic device (501), a chip board (502), a toothed plate (503) and a gear (507). A slider (504) is fixedly connected to one side of the toothed plate (503). A contactor (505) is fixedly connected above the slider (504). A reflector (506) is connected to one end of the telescopic device (501).

2. The overload protection device for a heat pump unit according to claim 1, characterized in that: The overload protector (3) is fitted inside the protective shell (2), the button (8) is rotatably connected inside the overload protector (3), and the telescopic device (501) is fixedly connected outside the overload protector (3).

3. The overload protection device for a heat pump unit according to claim 1, characterized in that: The chip board (502) is fixedly connected to the outside of the telescopic device (501), the chip board (502) is fixedly connected to the outside of the overload protector (3), and the gear (507) is fixedly connected to the outside of the guide rod (9).

4. The overload protection device for a heat pump unit according to claim 1, characterized in that: The slider (504) is slidably connected in the groove (6), the toothed plate (503) meshes with the gear (507), and the contactor (505) overlaps with the reflector (506).

5. The overload protection device for a heat pump unit according to claim 1, characterized in that: The sealing structure (4) includes a first rotating shaft (401), a second rotating shaft (402), and a motor (405). The first rotating shaft (401) is rotatably connected inside the protective shell (2), the second rotating shaft (402) is rotatably connected inside the protective shell (2), and a sealing plate (403) is connected to the outside of the first rotating shaft (401).

6. The overload protection device for a heat pump unit according to claim 5, characterized in that: The rotating shaft (402) is externally connected to a sealing plate (404), and the motor (405) is fixedly connected to the outside of the protective shell (2).

7. The overload protection device for a heat pump unit according to claim 6, characterized in that: The output shaft of the motor (405) is connected to the first rotating shaft (401). The first rotating shaft (401) is externally connected to an anti-slip belt (406). The first rotating shaft (401) is connected to the second rotating shaft (402) through the anti-slip belt (406).

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