Hot fluorine defrosting mechanism of refrigerating unit

Abstract

The hot fluorine defrosting mechanism of the refrigerating unit comprises a base, a compressor, a condenser, an evaporator and a liquid supply box, the compressor, the condenser, the evaporator and the liquid supply box are arranged on the base, the output end of the compressor is connected with a breather pipe, and a three-way reversing valve is arranged on the breather pipe. One outlet of the three-way reversing valve is connected with an air inlet of the condenser, the other outlet of the three-way reversing valve is connected with an inlet of the evaporator through a hot fluorine defrosting pipe, the condenser is arranged on one side of the compressor, and an outlet of the condenser is connected with the liquid supply box through a liquid refrigerant pipeline. And the liquid supply box is connected with the evaporator through an evaporation pipeline. Compared with the prior art, the refrigerating system has the advantages that the flow direction, the flow rate and the temperature of a refrigerant can be accurately controlled, it is ensured that the refrigerating system stably operates in a refrigerating mode, meanwhile, the defrosting mode can be rapidly switched to when defrosting is needed, and a frost layer on the surface of the evaporator is effectively removed.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigeration, in particular to a hot fluorine defrosting mechanism for a refrigeration unit. Background Technique

[0002] With the wide application of refrigeration technology, refrigeration units play an important role in many fields such as food preservation, cold chain logistics, and industrial refrigeration. However, during the refrigeration process, the surface of the evaporator is prone to frosting, which affects the refrigeration effect and the operating efficiency of the equipment. Therefore, defrosting has become an indispensable part of the refrigeration unit.

[0003] In the prior art, there are various defrosting methods for refrigeration units, including electric defrosting, water spraying defrosting, mechanical defrosting, etc. However, these methods all have different degrees of defects. Although electric defrosting is simple and easy to implement, it has high energy consumption, high cost, and is prone to causing the temperature in the warehouse to rise; although water spraying defrosting has a good defrosting effect, its effect is limited in a low-temperature environment and it is easy to cause equipment corrosion; mechanical defrosting has a large labor intensity and low efficiency.

[0004] In addition, existing refrigeration units often lack intelligent control during the defrosting process and cannot automatically adjust the defrosting time and intensity according to the actual frosting situation on the surface of the evaporator, resulting in unstable defrosting effects and even possible damage to the equipment. Content of the Utility Model

[0005] The technical problem to be solved by the utility model is to overcome the above technical defects and provide a hot fluorine defrosting mechanism for a refrigeration unit.

[0006] To solve the above technical problem, the technical solution provided by the utility model is: a hot fluorine defrosting mechanism for a refrigeration unit, including a base and a compressor, a condenser, an evaporator, and a liquid supply tank arranged on the base. The output end of the compressor is connected with a ventilation pipe, and a three-way reversing valve is arranged on the ventilation pipe. One outlet of the three-way reversing valve is connected with the air inlet of the condenser, and the other outlet of the three-way reversing valve is connected with the inlet of the evaporator through a hot fluorine defrosting pipe. The condenser is arranged on one side of the compressor, and the outlet of the condenser is connected with the liquid supply tank through a liquid refrigerant pipeline. The liquid supply tank is connected with the evaporator through an evaporation pipeline. A liquid level gauge is also arranged at the top of the liquid supply tank, and the liquid supply tank is connected with the liquid inlet of the compressor through a return pipe.

[0007] Further, a first drying filter is arranged on the return pipe.

[0008] Further, a first regulating valve is arranged on the ventilation pipe.

[0009] Further, a second regulating valve is arranged on the hot fluorine defrosting pipe.

[0010] Further, a first solenoid valve is provided on the liquid refrigerant pipeline.

[0011] Further, a second solenoid valve is provided on the evaporation pipeline.

[0012] Further, a temperature sensor is provided on the evaporator.

[0013] Further, a stirring motor is provided on the liquid supply tank. The output shaft of the stirring motor is provided with a stirring shaft located inside the liquid supply tank, and stirring rods are provided on the stirring shaft.

[0014] Further, a defrost return air pipe is also connected to the outlet of the evaporator. One end of the defrost return air pipe far from the evaporator is connected to the suction port of the compressor, and a second drying filter is provided on the defrost return air pipe.

[0015] The advantages of the present utility model compared with the prior art are as follows: Compared with the prior art, the significant advantage of this application is the realization of efficient coordination and intelligent control of the refrigeration and defrosting processes. By integrating key components such as a three-way reversing valve, solenoid valves, regulating valves, and temperature sensors, this application can precisely control the flow direction, flow rate, and temperature of the refrigerant, ensuring the stable operation of the refrigeration system in the refrigeration mode. At the same time, when defrosting is required, it can quickly switch to the defrosting mode to effectively remove the frost layer on the surface of the evaporator. This intelligent control strategy not only improves the response speed and defrosting efficiency of the refrigeration system but also significantly reduces energy consumption and maintenance costs. In addition, the application of the stirring motor ensures the uniform mixing of the liquid refrigerant in the liquid supply tank, further improving the overall performance and stability of the refrigeration system. In summary, this application shows significant advantages in improving refrigeration efficiency, reducing energy consumption, simplifying operation, and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of a hot gas defrosting mechanism of a refrigeration unit of the present utility model.

[0017] Figure 2 is a rear view structural diagram of a hot gas defrosting mechanism of a refrigeration unit of the present utility model.

[0018] As shown in the figure: 1. Base, 2. Compressor, 3. Condenser, 4. Liquid supply tank, 5. Vent pipe, 6. Three-way reversing valve, 7. Evaporator, 8. Hot gas defrosting pipe, 9. Liquid refrigerant pipeline, 10. Liquid level gauge, 11. Return pipe, 12. First drying filter, 13. First regulating valve, 14. Second regulating valve, 15. First solenoid valve, 16. Second solenoid valve, 17. Temperature sensor, 18. Stirring motor, 19. Defrost return air pipe, 20. Second drying filter. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following further elaborates on the present utility model in conjunction with the accompanying drawings.

[0020] The following further illustrates the specific implementation manner of the present utility model in conjunction with the accompanying drawings. Among them, the same components are denoted by the same reference numerals.

[0021] It should be noted that the terms "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the accompanying drawings, and the terms "inner" and "outer" respectively refer to the directions towards or away from the geometric center of a specific component.

[0022] In order to make the content of the present utility model more clearly understood, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model.

[0023] Combined with the attached Figure 1 - attached Figure 2 , a hot gas defrosting mechanism for a refrigeration unit, includes a base 1 and a compressor 2, a condenser 3, an evaporator 7 and a liquid supply tank 4 provided on the base 1. The output end of the compressor 2 is connected with a ventilation pipe 5. A three-way reversing valve 6 is provided on the ventilation pipe 5. One outlet of the three-way reversing valve 6 is connected with the air inlet of the condenser 3, and the other outlet of the three-way reversing valve 6 is connected with the inlet of the evaporator 7 through a hot gas defrosting pipe 8. The condenser 3 is arranged on one side of the compressor 2, and the outlet of the condenser 3 is connected with the liquid supply tank 4 through a liquid refrigerant pipeline 9. The liquid supply tank 4 is connected with the evaporator 7 through an evaporation pipeline 21. A liquid level gauge 10 is further provided on the top of the liquid supply tank 4, and the liquid supply tank 4 is connected with the liquid inlet of the compressor 2 through a return pipe 11.

[0024] In one embodiment, a first drying filter 12 is provided on the return pipe 11. The main function of the first drying filter 12 provided on the return pipe 11 is to filter and remove possible impurities, moisture and fine particles in the refrigerant. If these impurities enter the compressor 2, they may have an adverse impact on the operating efficiency and life of the compressor 2. The first drying filter 12 uses a high-efficiency filtering material, which can effectively prevent impurities from entering the compressor 2. At the same time, the desiccant inside it can absorb the moisture in the refrigerant to prevent the moisture from freezing or causing corrosion inside the compressor 2. In addition, the first drying filter 12 also has a certain dust capacity and can work continuously for a period of time, but it also needs to be regularly inspected and replaced to ensure its filtering effect.

[0025] In one embodiment, a first regulating valve 13 is provided on the vent pipe 5. By adjusting the opening degree of the first regulating valve 13, fine adjustment of the refrigerant flow rate can be achieved, thereby meeting the requirements of the refrigeration system under different working conditions. For example, when the refrigeration load is large, the opening degree of the first regulating valve 13 can be appropriately increased to increase the refrigerant flow rate and improve the refrigeration efficiency; while when the refrigeration load is small, the opening degree of the first regulating valve 13 can be reduced to reduce the refrigerant flow rate and lower the energy consumption. The first regulating valve 13 usually adopts an electric or pneumatic actuator, which can achieve remote control and automatic adjustment, improving the intelligent level of the system.

[0026] In one embodiment, a second regulating valve 14 is provided on the hot fluorine defrosting pipe 8. During the defrosting process, by adjusting the opening degree of the second regulating valve 14, the heating intensity and defrosting speed inside the evaporator 7 can be controlled. If the defrosting steam volume is too large, it may cause the surface temperature of the evaporator 7 to be too high, even damaging the evaporator 7; while if the defrosting steam volume is too small, the frost layer may not be effectively removed. Therefore, the precise adjustment of the second regulating valve 14 is crucial for ensuring the defrosting effect and equipment safety. The second regulating valve 14 can also adopt an electric or pneumatic actuator to achieve remote control and automatic adjustment.

[0027] In one embodiment, a first solenoid valve 15 is provided on the liquid refrigerant pipeline 9. In the refrigeration mode, the first solenoid valve 15 is in the open state, allowing the liquid refrigerant to flow smoothly into the liquid supply tank 4 for storage; while when shutdown or maintenance is required, the first solenoid valve 15 can be closed to cut off the flow path of the liquid refrigerant. The fast response and reliable performance of the first solenoid valve 15 ensure the stable operation of the refrigeration system under different working conditions. In addition, the first solenoid valve 15 can also be linked with other control elements of the refrigeration system to achieve more complex control logics and automated operations.

[0028] In one embodiment, a second solenoid valve 16 is provided on the evaporation pipeline. In the refrigeration mode, the second solenoid valve 16 is in the open state, allowing the liquid refrigerant to enter the evaporator 7 through the evaporation pipeline 21 for evaporation refrigeration; while when shutdown, defrosting or other operations are required, the second solenoid valve 16 can be closed to cut off the supply of the liquid refrigerant. The precise control and fast response of the second solenoid valve 16 contribute to the rapid start and stop of the refrigeration system, as well as flexible working condition switching. At the same time, it can also be used in cooperation with other control elements of the refrigeration system to achieve more intelligent control and optimized operation.

[0029] In one embodiment, a temperature sensor 17 is provided on the evaporator 7. The temperature data collected by the temperature sensor 17 can be used to determine the operating state and refrigeration effect of the evaporator 7. For example, in the refrigeration mode, if the surface temperature of the evaporator 7 is too low, frosting may occur; if the temperature is too high, it may indicate insufficient refrigeration capacity or other faults in the system. According to the feedback signal of the temperature sensor 17, the refrigeration system can automatically adjust the operating state or send an alarm signal to ensure the safe and efficient operation of the system. In addition, the temperature sensor 17 can also be used in conjunction with other control elements of the refrigeration system to achieve more precise temperature control and regulation.

[0030] In one embodiment, a stirring motor 18 is provided on the liquid supply tank 4. The output shaft of the stirring motor 18 is provided with a stirring shaft located inside the liquid supply tank 4, and the stirring shaft is provided with stirring rods. The function of the stirring motor 18 is to keep the liquid refrigerant in the liquid supply tank 4 in a uniformly mixed state, preventing the refrigerant from stratifying or precipitating. During the operation of the refrigeration system, due to changes in factors such as temperature and pressure, the liquid refrigerant may stratify, resulting in a decrease in the refrigeration effect. Through the stirring action of the stirring motor 18, the components in the liquid refrigerant can be fully mixed evenly, improving the refrigeration efficiency and stability of the refrigeration system.

[0031] In one embodiment, the outlet of the evaporator 7 is further connected to a defrost return air pipe 19. One end of the defrost return air pipe 19 far from the evaporator 7 is connected to the suction port of the compressor 2, and a second drying filter 20 is provided on the defrost return air pipe 19.

[0032] Working principle: When the refrigeration of this application starts, the compressor 2 starts, inhaling the refrigerant vapor at low temperature and low pressure, which is compressed into refrigerant vapor at high temperature and high pressure and output through the ventilation pipe 5. The three-way reversing valve 6 on the ventilation pipe 5 is in the refrigeration mode, so that the refrigerant vapor at high temperature and high pressure flows into the condenser 3 through one of its outlets. In the condenser 3, the refrigerant exchanges heat with the external environment, releases heat and condenses into liquid refrigerant. The condensed liquid refrigerant flows into the liquid supply tank 4 through the liquid refrigerant pipe 9 for storage. The liquid level gauge 10 at the top of the liquid supply tank 4 monitors the liquid level to ensure that the amount of refrigerant is appropriate. Subsequently, the liquid refrigerant enters the evaporator 7 through the evaporation pipe 21 (equipped with a second solenoid valve 16 to control the supply of refrigerant), evaporates and absorbs heat in the evaporator to achieve the refrigeration effect. The evaporated refrigerant vapor and a small amount of liquid refrigerant that may be carried out from the evaporator 7 flow back to the liquid inlet of the compressor 2 through the return pipe 11 (equipped with a first drying filter 12 to remove impurities and moisture), completing the refrigerant cycle.

[0033] When the frosting on the surface of the evaporator 7 is severe, it is necessary to start the hot fluorine defrosting mode. At this time, the three-way reversing valve 6 switches to the defrosting mode, and the high-temperature and high-pressure refrigerant vapor discharged by the compressor 2 enters the evaporator 7 through the hot fluorine defrosting pipe 8. The high-temperature and high-pressure refrigerant vapor releases heat in the evaporator 7 to heat the surface of the evaporator and melt the frost layer. The second regulating valve 14 on the hot fluorine defrosting pipe 8 is used to regulate the amount of refrigerant vapor entering the evaporator 7 to control the defrosting effect and speed. During the defrosting process, the melted frost water in the evaporator 7 is mixed with the remaining refrigerant and lubricating oil and flows back to the suction port of the compressor 2 through the defrosting return pipe 19 (equipped with a second drying filter 20 to remove moisture and impurities). At the same time, the refrigerant vapor in the evaporator 7 also returns to the compressor 2 through the defrosting return pipe 19 and participates in the refrigeration cycle again. After the defrosting is completed, the three-way reversing valve 6 switches back to the refrigeration mode, and the refrigeration unit resumes the normal refrigeration process. At this time, the liquid refrigerant evaporates and refrigerates again from the liquid supply tank 4 through the evaporation pipeline 21 and the evaporator 7 to complete the refrigeration cycle.

[0034] During the whole working process, the first regulating valve 13 on the ventilation pipe 5 is used to regulate the amount of refrigerant vapor entering the compressor 2, the first solenoid valve 15 on the liquid refrigerant pipeline 9 is used to control the flow direction of the liquid refrigerant, the temperature sensor 17 on the evaporator 7 monitors the evaporator temperature, and the stirring motor 18 on the liquid supply tank 4 and its stirring shaft and stirring rod are used to stir the refrigerant in the liquid supply tank to ensure uniform mixing of the refrigerant.

[0035] The above describes the present invention and its implementation manners. This description is not restrictive. What is shown in the drawings is only one of the implementation manners of the present invention, and the actual structure is not limited thereto. Generally speaking, if those of ordinary skill in the art are inspired by it and without departing from the creative concept of the present invention, they design similar structural manners and embodiments to this technical solution without creative efforts, which shall fall within the protection scope of the present invention.

Claims

1. A hot gas defrosting mechanism for a refrigeration unit, characterized in that, It includes a base (1), as well as a compressor (2), a condenser (3), an evaporator (7), and a liquid supply tank (4) provided on the base (1). The output end of the compressor (2) is connected to a ventilation pipe (5). A three-way reversing valve (6) is provided on the ventilation pipe (5). One outlet of the three-way reversing valve (6) is connected to the intake port of the condenser (3), and the other outlet of the three-way reversing valve (6) is connected to the inlet of the evaporator (7) through a hot fluorine defrosting pipe (8). The condenser (3) is arranged on one side of the compressor (2), and the outlet of the condenser (3) is connected to the liquid supply tank (4) through a liquid refrigerant pipe (9). The liquid supply tank (4) is connected to the evaporator (7) through an evaporation pipe (21). A liquid level gauge (10) is also provided on the top of the liquid supply tank (4), and the liquid supply tank (4) is connected to the liquid inlet of the compressor (2) through a return pipe (11).

2. The hot gas defrosting mechanism of a refrigeration unit according to claim 1, characterized in that, A first drying filter (12) is provided on the return pipe (11).

3. The hot gas defrosting mechanism of a refrigeration unit according to claim 1, characterized in that, A first regulating valve (13) is provided on the ventilation pipe (5).

4. The hot fluorine defrosting mechanism of a refrigeration unit according to claim 1, characterized in that, A second regulating valve (14) is provided on the hot fluorine defrosting pipe (8).

5. The hot gas defrosting mechanism of a refrigeration unit according to claim 1, characterized in that, A first solenoid valve (15) is provided on the liquid refrigerant pipe (9).

6. The hot gas defrosting mechanism of a refrigeration unit according to claim 1, characterized in that, A second solenoid valve (16) is provided on the evaporation pipe (21).

7. The hot gas defrosting mechanism of a refrigeration unit according to claim 1, characterized in that, A temperature sensor (17) is provided on the evaporator (7).

8. The hot-gas defrosting mechanism of a refrigeration unit according to claim 1, characterized in that A stirring motor (18) is provided on the liquid supply tank (4). The output shaft of the stirring motor (18) is provided with a stirring shaft located inside the liquid supply tank (4), and stirring rods are provided on the stirring shaft.

9. The hot fluorine defrosting mechanism of a refrigeration unit according to claim 1, characterized in that, The outlet of the evaporator (7) is also connected to a defrosting return air pipe (19). One end of the defrosting return air pipe (19) far from the evaporator (7) is connected to the suction port of the compressor (2), and a second drying filter (20) is provided on the defrosting return air pipe (19).

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