CN212902078U

CN212902078U - Novel refrigeration equipment

Info

Publication number: CN212902078U
Application number: CN202021831094.4U
Authority: CN
Inventors: 赵健; 赵华强
Original assignee: Jiangsu Jingying Kitchen Equipment Co ltd
Current assignee: Jiangsu Jingying Kitchen Equipment Co ltd
Priority date: 2020-08-28
Filing date: 2020-08-28
Publication date: 2021-04-06
Anticipated expiration: 2030-08-28

Abstract

The utility model discloses a novel refrigeration device, which comprises a compressor, a condenser and a refrigeration area, wherein a first bypass pipeline is arranged between an air outlet and an air return port of the compressor, a three-way valve is arranged on one side of the first bypass pipeline close to the compressor, one end of the condenser is connected with the air outlet of the compressor, and the other end of the condenser is connected to the refrigeration area; the refrigeration district is including the gas-liquid separation device and the return-air device that set gradually, and gas-liquid separation device is close to the condenser, and the return-air device is provided with a plurality of return-air inlets that correspond, is provided with the return-air valve on the return-air branch pipe. The utility model discloses simple structure can improve the security of part refrigerant, reduces the harm that takes place the leakage accident, heat transfer device's heat exchange efficiency in the middle of improving, has solved that the pressure drop that evaporimeter flow overlength leads to under the traditional mode is big, the superheat degree is big, hang bad phenomenon such as frost is not full, has solved the compressor refrigerating output and has unmatched the messenger with terminal load, and the phenomenon of ultralow suction pressure appears in the compressor.

Description

Novel refrigeration equipment

Technical Field

The utility model relates to a refrigeration plant technical field, concretely relates to novel refrigeration plant.

Background

The compressor of the refrigeration principle of a general refrigerator has the function of compressing steam with lower pressure into steam with higher pressure, so that the volume of the steam is reduced, and the pressure is increased. The compressor sucks working medium steam with lower pressure from the evaporator, the working medium steam with lower pressure is sent into the condenser after the pressure of the working medium steam is increased, the working medium steam is condensed into liquid with higher pressure in the condenser, the liquid with lower pressure is sent into the evaporator after the liquid is throttled by the throttle valve, the liquid is evaporated by absorbing heat in the evaporator to form steam with lower pressure, and the steam is sent into an inlet of the compressor, so that the refrigeration cycle is completed.

At present, in the traditional mode of refrigerator construction, one compression condensing unit generally corresponds to one evaporator, if a plurality of evaporators are required to be corresponded, the pressure drop caused by the influence of the distance from the tail end to a refrigeration host is overlarge and inconsistent, and the refrigeration capacity loss is overlarge; meanwhile, liquid separation of the main liquid supply pipe and gas accumulation of the main gas return pipe are extremely uneven, liquid supply of part of evaporators is seriously insufficient to cause reduction of refrigeration efficiency, liquid return is caused by excessive liquid supply of part of evaporators, and the compressor can be damaged in serious cases; in addition, in a specific occasion such as a refrigerator, ammonia is generally used as a refrigerant to perform cooling and refrigeration, but ammonia is used as the refrigerant, and due to the flammability and toxicity of ammonia, serious safety accidents are easily caused once ammonia leakage occurs.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a novel refrigeration plant, simple structure can improve the security of part refrigerant, reduces the harm that takes place the leakage accident, improves heat transfer device's heat exchange efficiency in the middle of, has solved that the pressure drop that evaporimeter flow overlength leads to under the traditional mode is big, the superheat degree is big, hang bad phenomenon such as frost not full, has solved the compressor refrigerating output and has mismatched the messenger with terminal load, the phenomenon of ultralow suction pressure appears in the compressor.

In order to solve the technical problem, the utility model provides a novel refrigeration device, which comprises a compressor, a condenser and a refrigeration area, wherein a first bypass pipeline is arranged between an air outlet and an air return port of the compressor, a three-way valve is arranged on one side of the first bypass pipeline close to the compressor, one end of the condenser is connected with the air outlet of the compressor, and the other end of the condenser is connected to the refrigeration area; the refrigeration area comprises a gas-liquid separation device and an air return device which are sequentially arranged, the gas-liquid separation device is close to the condenser, the gas-liquid separation device is provided with a plurality of liquid supply outlets, the air return device is provided with a plurality of corresponding air return inlets, a throttling device and an evaporator are sequentially arranged between the liquid supply outlets and the air return inlets, a liquid supply branch pipe is arranged between the liquid supply outlets and the throttling device, a liquid supply valve is arranged on the liquid supply branch pipe, a liquid dividing head and a liquid dividing pipe are arranged between the throttling device and the evaporator, an air return branch pipe is arranged between the evaporator and the air return inlets, and an air return valve is arranged on the air return branch pipe; the refrigeration district with be provided with first heat exchanger between the compressor, the compressor with be provided with the second heat exchanger between the condenser, first heat exchanger with be provided with middle heat transfer device between the second heat exchanger, middle heat transfer device is including the third heat exchanger that is close to first heat exchanger and the fourth heat exchanger that is close to the second heat exchanger, the third heat exchanger with be provided with the connecting pipe between the fourth heat exchanger.

Further, a liquid storage device is arranged between the condenser and the refrigerating area.

Further, an oil separator is arranged between the compressor and the condenser.

Furthermore, the condenser and the evaporator are both provided with fans.

Furthermore, the flow direction of the refrigerant in the third heat exchanger is the same as the flow direction of the refrigerant in the first heat exchanger, and the flow direction of the refrigerant in the fourth heat exchanger is the same as the flow direction of the refrigerant in the second heat exchanger.

Further, the evaporator is a short-process evaporation calandria, and the length of the short-process evaporation calandria is not more than 50 m.

Further, the throttling device is a thermal expansion valve.

The utility model has the advantages that: 1. the heat regenerator is separated into two parts, and the heat exchange is carried out by utilizing the intermediate heat exchange device, so that the refrigerating source adopting ammonia as a refrigerant is kept on one side, the ammonia consumption is reduced to the greatest extent, the harm caused when ammonia leaks is reduced, the major hazard source of the original ammonia refrigeration of the refrigerating system is changed into a non-major hazard source, and the safety of the refrigerating system is improved;

2. the device utilizes the cooperation of the gas-liquid separation device and the air return device, so that the liquid supply amount from the gas-liquid separation device to the inlet of each group of evaporators in the whole equipment is more uniformly distributed, and the pressure drop from each group of evaporators to the air return end of the compressor is completely consistent; the problems of large pressure drop, large superheat degree, insufficient frosting and the like caused by overlong flow of the evaporator in the traditional mode are completely solved; the problem of the unit refrigeration capacity mismatch with the terminal load make, the phenomenon of the ultralow suction pressure appears in the unit is solved.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

The reference numbers in the figures illustrate: 1. a compressor; 2. a condenser; 3. a refrigeration zone; 4. an exhaust port; 5. an air return port; 6. a first bypass line; 7. a three-way valve; 8. a gas-liquid separation device; 9. a gas return device; 10. a liquid supply outlet; 11. a return air inlet; 12. a throttling device; 13. an evaporator; 14. liquid supply branch pipes; 15. a liquid supply valve; 16. a liquid separation head; 17. a liquid separating pipe; 18. air return branch pipes; 19. an air return valve; 20. a first heat exchanger; 21. a second heat exchanger; 22. a third heat exchanger; 23. a fourth heat exchanger; 24. a connecting pipe; 25. a reservoir; 26. an oil separator; 27. a fan.

Detailed Description

The present invention is further described with reference to the following drawings and specific embodiments so that those skilled in the art can better understand the present invention and can implement the present invention, but the embodiments are not to be construed as limiting the present invention.

Referring to fig. 1, an embodiment of a novel refrigeration device of the present invention includes a compressor 1, a condenser 2 and a refrigeration area 3, a first bypass pipeline 6 is further disposed between an exhaust port 4 and a return air port 5 of the compressor 1, a three-way valve 7 is disposed on one side of the first bypass pipeline 6 close to the compressor 1, one end of the condenser 2 is connected to the exhaust port 4 of the compressor 1, and the other end of the condenser 2 is connected to the refrigeration area 3; the refrigerating area 3 comprises a gas-liquid separation device 8 and an air return device 9 which are sequentially arranged, the gas-liquid separation device 8 is close to the condenser 2, the gas-liquid separation device 8 is provided with a plurality of liquid supply outlets 10, the air return device 9 is provided with a plurality of corresponding air return inlets 11, a throttling device 12 and an evaporator 13 are sequentially arranged between the liquid supply outlets 10 and the air return inlets 11, a liquid supply branch pipe 14 is arranged between the liquid supply outlets 10 and the throttling device 12, a liquid supply valve 15 is arranged on the liquid supply branch pipe 14, a liquid distribution head 16 and a liquid distribution pipe 17 are arranged between the throttling device 12 and the evaporator 13, an air return branch pipe 18 is arranged between the evaporator 13 and the air return inlets 11, and an air return valve 19 is arranged on the air return branch pipe 18; be provided with first heat exchanger 20 between refrigeration district 3 and the compressor 1, be provided with second heat exchanger 21 between compressor 1 and the condenser 2, be provided with middle heat transfer device between first heat exchanger 20 and the second heat exchanger 21, middle heat transfer device is including being close to the third heat exchanger 22 of first heat exchanger 20 and being close to the fourth heat exchanger 23 of second heat exchanger 21, is provided with connecting pipe 24 between third heat exchanger 22 and the fourth heat exchanger 23.

When the refrigerant bypass type refrigerating system is used, because the first bypass pipeline 6 is arranged on one side of the compressor 1, one of the compressor 1 and the first bypass pipeline 6 bypasses in the working process of the refrigerating system, when the compressor 1 bypasses, the refrigerant enters the compressor 1 from the air return port 5 of the compressor 1, and the refrigerant can be discharged through the air exhaust port 4 of the compressor 1 after being compressed by the compressor 1; when the first bypass pipeline 6 is bypassed, the refrigerant directly flows in from the first end of the first bypass pipeline 6 and flows out from the second end, after the third heat exchanger 22 exchanges heat with the first heat exchanger 20, the heat is transferred to the fourth heat exchanger 23 through the refrigerant, then the fourth heat exchanger 23 exchanges heat with the second heat exchanger 21, and the heat at the second heat exchanger 21 is absorbed, so that the second heat exchanger 21 releases heat, the refrigeration function of the refrigeration device is realized, and the mode can prevent ammonia from leaking.

The device in the cooling zone 3 operates as follows, communicating between each group of liquid supply outlets 10 and the corresponding evaporator inlet through the liquid supply branch 14, and the length of each group of liquid supply branch 14 being the same, also keeping the pressure drop of the refrigerant liquid reaching the evaporator through each group of liquid supply branch 14 uniform. Each group of liquid supply outlets 10 is also provided with one or more groups of liquid supply valves 15, so that the on-off of the corresponding liquid supply branch pipes 14 can be controlled in real time and the liquid supply amount of each group of evaporators can be controlled according to specific conditions, the phenomenon that liquid distribution from a main liquid supply pipe to each group of evaporators is extremely uneven in a refrigeration system is avoided, each group of air return inlets and the corresponding evaporator outlets are communicated through air return branch pipes 18, and the lengths of the air return branch pipes 18 are the same, so that the air return pressure drops generated by refrigerant steam returning to the air return integrated device through each group of evaporators are consistent; and one or more groups of air return valves 19 are arranged on the air return inlet and are used for controlling the on-off and air return quantity of the corresponding air return branch pipes 18.

Be provided with reservoir 25 between condenser 2 and the refrigeration district 3, be provided with oil separator 26 between compressor 1 and the condenser 2, can separate the lubricating oil that flows out from compressor 1, guarantee the lubrication effect to each part of refrigerating system, all be provided with fan 27 on condenser 2 and the evaporimeter 13, can accelerate the heat dissipation of evaporimeter 13 and condenser 2, thereby can reduce compressor 1's load and consumption, and then can reduce system's energy consumption, the evaporimeter is short flow evaporation calandria, short flow evaporation calandria's length is no longer than 50m, throttling arrangement 12 is thermal expansion valve.

The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. Equivalent substitutes or changes made by the technical personnel in the technical field on the basis of the utility model are all within the protection scope of the utility model. The protection scope of the present invention is subject to the claims.

Claims

1. The novel refrigeration equipment is characterized by comprising a compressor, a condenser and a refrigeration area, wherein a first bypass pipeline is arranged between an exhaust port and a return air port of the compressor, a three-way valve is arranged on one side, close to the compressor, of the first bypass pipeline, one end of the condenser is connected with the exhaust port of the compressor, and the other end of the condenser is connected to the refrigeration area;

the refrigeration area comprises a gas-liquid separation device and an air return device which are sequentially arranged, the gas-liquid separation device is close to the condenser, the gas-liquid separation device is provided with a plurality of liquid supply outlets, the air return device is provided with a plurality of corresponding air return inlets, a throttling device and an evaporator are sequentially arranged between the liquid supply outlets and the air return inlets, a liquid supply branch pipe is arranged between the liquid supply outlets and the throttling device, a liquid supply valve is arranged on the liquid supply branch pipe, a liquid dividing head and a liquid dividing pipe are arranged between the throttling device and the evaporator, an air return branch pipe is arranged between the evaporator and the air return inlets, and an air return valve is arranged on the air return branch pipe;

the refrigeration district with be provided with first heat exchanger between the compressor, the compressor with be provided with the second heat exchanger between the condenser, first heat exchanger with be provided with middle heat transfer device between the second heat exchanger, middle heat transfer device is including the third heat exchanger that is close to first heat exchanger and the fourth heat exchanger that is close to the second heat exchanger, the third heat exchanger with be provided with the connecting pipe between the fourth heat exchanger.

2. A novel refrigeration apparatus as claimed in claim 1 wherein an accumulator is provided between said condenser and said refrigeration zone.

3. The novel refrigeration appliance according to claim 1 wherein an oil separator is disposed between said compressor and said condenser.

4. The novel refrigeration appliance according to claim 1 wherein fans are provided on both said condenser and said evaporator.

5. The novel refrigeration equipment as claimed in claim 1, wherein the refrigerant flowing direction in the third heat exchanger is the same as the refrigerant flowing direction in the first heat exchanger, and the refrigerant flowing direction in the fourth heat exchanger is the same as the refrigerant flowing direction in the second heat exchanger.

6. The novel refrigeration appliance of claim 1 wherein said evaporator is a short run evaporator gauntlet, said short run evaporator gauntlet having a length of no more than 50 m.

7. The novel refrigeration appliance of claim 1 wherein said throttling means is a thermostatic expansion valve.