CN218972934U - Cold filling service equipment - Google Patents

Abstract

The utility model provides a cold charging service device for carrying out cold charging service on a cold accumulation box, comprising: the device comprises an air return header, a low-pressure liquid storage device, a compressor, a condenser, a liquid supply header and a vacuum pump, wherein a first outlet of the air return header is connected with an inlet of the low-pressure liquid storage device, an outlet of the low-pressure liquid storage device is connected with an inlet of the compressor, an outlet of the compressor is connected with an inlet of the condenser, an outlet of the condenser is connected with an inlet of the liquid supply header, an inlet of the vacuum pump is connected with a second outlet of the air return header and a second outlet of the liquid supply header, and an inlet of the air return header, a first outlet of the liquid supply header and a cold storage box are connected. The utility model solves the technical problem that air exists in a pipeline easily in the operation process, so that cold cannot be filled into the cold accumulation box, and realizes the technical effect of vacuumizing the pipeline of the cold accumulation box and avoiding the operation of water vapor in the air in the pipeline.

Description

Cold filling service equipment

Technical Field

The utility model relates to the technical field of cold chain logistics, in particular to cooling service equipment.

Background

In order to maintain the temperature in the small-sized cold storage box within a preset constant temperature range, cold energy supplementation is needed to be carried out on equipment such as a cold storage box active cold storage vehicle and the like by using cold charging equipment. The cold accumulation working medium is subjected to cold charge through the cold charge equipment, the cold quantity is accumulated in advance by utilizing the phase change characteristic of the cold charge equipment, and the cold quantity is released to a cargo area at the lower part of the cold accumulation element in a convection heat exchange mode in the transportation process, so that the cargo in the cold accumulation box or the cold accumulation car is kept in a certain temperature range lower than the external environment temperature, and the quality of the cargo is ensured without being changed by the ambient temperature and the humidity environment. The existing cold accumulation equipment has few types, and cannot be used as cold chain transportation equipment under the condition of not having a refrigerating unit.

However, in the practical application process, there is a problem that: when the cooling device and the cold accumulation box are independent devices, air is easy to exist in the pipeline in the operation process, and once water vapor in the air runs in the pipeline, the refrigeration system can be seriously damaged, so that cooling cannot be performed.

Disclosure of Invention

The utility model solves the technical problem that air exists in a pipeline easily in the operation process to cause the incapability of filling cold for the cold storage box, and realizes the technical effect of vacuumizing the pipeline for the cold storage box and avoiding the operation of water vapor in the air in the pipeline.

In order to solve the above problems, the present utility model provides a cold charging service device for performing a cold charging service for a cold storage tank, the cold charging service device comprising: the device comprises an air return header, a low-pressure liquid storage device, a compressor, a condenser, a liquid supply header and a vacuum pump, wherein a first outlet of the air return header is connected with an inlet of the low-pressure liquid storage device, an outlet of the low-pressure liquid storage device is connected with an inlet of the compressor, an outlet of the compressor is connected with an inlet of the condenser, an outlet of the condenser is connected with an inlet of the liquid supply header, an inlet of the vacuum pump is connected with a second outlet of the air return header and a second outlet of the liquid supply header, and an inlet of the air return header, a first outlet of the liquid supply header and a cold storage box are connected.

Compared with the prior art, the technical effect achieved by adopting the technical scheme is as follows: the cold charging service equipment is connected with the cold accumulation box through the air return header and the liquid supply header to form a closed loop; before entering the compressor, the gaseous refrigerant needs to pass through a low-pressure liquid storage device to separate out the liquid part of the refrigerant; the compressor is used for compressing the gas separated from the low-pressure liquid storage device; the condenser is used for condensing the gas discharged from the compressor; the vacuum pump is arranged for vacuumizing the pipeline of the cold accumulation box before working, so that the problem that the refrigerating system is seriously damaged and cannot be charged with cold due to the fact that water vapor in the air runs in the pipeline is avoided.

In one example of the utility model, at least two high-pressure liquid storage systems, a liquid supply electromagnetic valve, a second ball valve and an expansion valve are arranged between the condenser and the liquid supply header, the outlet of the condenser is connected with the inlet of the high-pressure liquid storage system, the outlet of the high-pressure liquid storage system is connected with the inlet of the liquid supply electromagnetic valve, the outlet of the liquid supply electromagnetic valve is connected with the inlet of the second ball valve, the outlet of the second ball valve is connected with the inlet of the expansion valve, and the outlet of the expansion valve is connected with the inlet of the liquid supply header.

Compared with the prior art, the technical effect achieved by adopting the technical scheme is as follows: at least two high-pressure liquid storage systems are arranged between the condenser and the liquid supply header pipe, at least one high-pressure liquid storage system is used for working, and the other high-pressure liquid storage system can be used for refrigerating, recovering and storing refrigerant; the liquid supply solenoid valve is used for controlling the flow rate of liquid refrigerant flowing from the outlet of the high-pressure liquid storage system to the inlet of the second ball valve, the second ball valve is used for controlling the flow rate of liquid refrigerant flowing from the outlet of the liquid supply solenoid valve to the inlet of the expansion valve, and the expansion valve is used for throttling the liquid refrigerant with medium temperature and high pressure into low-temperature and low-pressure wet steam through the expansion valve.

In one example of the utility model, a high pressure reservoir system includes: the outlet of the condenser is connected with the inlet of the electric valve, the outlet of the electric valve is connected with the inlet of the high-pressure liquid storage device, the outlet of the high-pressure liquid storage device is connected with the inlet of the stop valve, and the outlet of the stop valve is connected with the inlet of the liquid supply electromagnetic valve; the inlet of the electric valve is connected with the outlet of the stop valve through a second bypass pipe, and a third electric valve is arranged on the second bypass pipe.

Compared with the prior art, the technical effect achieved by adopting the technical scheme is as follows: the first high-pressure liquid storage system comprises a first electric valve, a first high-pressure liquid storage device, a first stop valve and a second bypass pipe, and a third electric valve is arranged on the second bypass pipe; the second high-pressure liquid storage system comprises a second electric valve, a second high-pressure liquid storage device, a second stop valve and a third bypass pipe, and a fourth electric valve is arranged on the third bypass pipe. The first high-pressure liquid storage system is provided with a second bypass pipe, so that the first high-pressure liquid storage device can be replaced in time, and the second high-pressure liquid storage system is provided with a third bypass pipe, so that the second high-pressure liquid storage device can be replaced in time.

In one example of the utility model, a first bypass pipe is arranged among the liquid supply header, the air return header and the vacuum pump, the inlet of the first bypass pipe is connected with the second outlet of the liquid supply header, the outlet of the first bypass pipe is connected with the inlet of the vacuum pump, and the inlet of the first bypass pipe is also connected with the second outlet of the air return header; the first bypass pipe is provided with a sixth electromagnetic valve, a fifth electromagnetic valve is arranged between the inlet of the first bypass pipe and the second outlet of the liquid supply header, and a first electromagnetic valve is arranged between the inlet of the first bypass pipe and the second outlet of the return air header.

Compared with the prior art, the technical effect achieved by adopting the technical scheme is as follows: one end of the first bypass pipe is communicated with the liquid supply header and the air return header, the other end of the first bypass pipe is communicated with the vacuum pump, and the first bypass pipe is used for controlling the vacuum pumping service of the liquid supply header and the air return header, and the vacuum system and the cooling system are integrated; the sixth electromagnetic valve is arranged on the first bypass pipe and used for controlling the direction, flow, speed and the like of the fluid in the first bypass pipe; the fifth electromagnetic valve is used for controlling the direction, flow and speed of the fluid between the second outlet of the liquid supply header pipe and the inlet of the first bypass pipe; the first electromagnetic valve is used for controlling the direction, flow and speed of fluid between the second outlet of the return air header and the inlet of the first bypass pipe.

In one example of the present utility model, an oil separator is provided between the compressor and the condenser.

Compared with the prior art, the technical effect achieved by adopting the technical scheme is as follows: the oil separator is connected in series between the compressor and the condenser, and is arranged at the outlet side of the compressor, and can separate lubricating oil, so that the amount of lubricating oil brought into the system by the refrigerant can be reduced to the maximum extent, and reliable lubrication of the running parts of the compressor is ensured at low ambient temperature.

In one example of the utility model, a condensing fan is provided on the condenser.

Compared with the prior art, the technical effect achieved by adopting the technical scheme is as follows: the condensing fan is arranged on the condenser, and the condensing fan rapidly discharges air around the condenser to dissipate heat.

In one example of the utility model, a first ball valve is provided between the return air header and the low pressure reservoir.

Compared with the prior art, the technical effect achieved by adopting the technical scheme is as follows: a first ball valve is arranged between the return air header and the low-pressure liquid reservoir to facilitate the maintenance of the pipeline and the adjustment of related fluid.

In one example of the utility model, the liquid supply header is provided with a second angle valve and the return header is provided with a first angle valve.

Compared with the prior art, the technical effect achieved by adopting the technical scheme is as follows: the second angle valve and the first angle valve are used for controlling the flow rate of the liquid supply header and the return air header respectively.

In one embodiment of the utility model, the inlet of the return header is provided with at least one return pipe connection, and the outlet of the supply header is provided with at least one supply pipe connection.

Compared with the prior art, the technical effect achieved by adopting the technical scheme is as follows: the air return pipe joint and the liquid supply pipe joint are respectively connected with the outlet and the inlet of the cold accumulation box to form a closed loop, so that the normal working operation of the cold charging service equipment is ensured; and the number of the air return pipe joints is the same as that of the liquid supply pipe joints, so that a plurality of groups of air return pipe joints and liquid supply pipe joints can be arranged, and meanwhile, a plurality of cold storage boxes are filled with cold.

In one example of the present utility model, a cold box includes: at least two cold accumulation units; the air return outlet is connected with the inlet of the air return header; a liquid supply inlet connected with the outlet of the liquid supply header; wherein, the air return outlet and the liquid supply inlet are communicated with the two cold accumulation units.

Compared with the prior art, the technical effect achieved by adopting the technical scheme is as follows: the cold accumulation unit is an independent energy storage unit and is used for storing the refrigerant; the cold storage box is also provided with an air return outlet and a liquid supply inlet which are communicated with at least two cold storage units, and an air return outlet and a liquid supply inlet of the cold storage units are provided.

After the technical scheme of the utility model is adopted, the following technical effects can be achieved:

(1) The vacuum pump is arranged for vacuumizing the pipeline of the cold accumulation box before working, so that the problem that the refrigerating system is seriously damaged and cold cannot be filled due to the fact that water vapor in the air runs in the pipeline is avoided;

(2) At least two high-pressure liquid storage systems are arranged, at least one high-pressure liquid storage system is used for carrying out cold charging work, at least one other high-pressure liquid storage system can be used for recovering and storing the refrigerant, and the cold charging and the refrigerant recovering are integrated;

(3) The cold charging service equipment is provided with a plurality of air return pipe joints and liquid supply pipe joints, and can charge cold for a plurality of cold storage boxes at the same time.

Drawings

Fig. 1 is a schematic structural diagram of a cooling service device according to a first embodiment of the present utility model.

Fig. 2 is another structural schematic diagram of the cold charging service equipment of fig. 1.

FIG. 3 is a schematic view of the cold storage box of FIG. 1.

FIG. 4 is a schematic diagram of the cold storage box of FIG. 2.

Reference numerals illustrate:

100-return air header; 110 a-a first return air pipe joint; 110 b-a second return air pipe joint; 120-a first angle valve; 101-a first ball valve; 105-a first solenoid valve; 186-sixth solenoid valve; 181-a first bypass pipe; 200-a low pressure reservoir; 300-compressor; 304-oil separator; 400-condenser; 410 a-a first high pressure reservoir; 411 a-a first electrically operated valve; 412 a-a first shut-off valve; 420 a-a second bypass pipe; 421 a-a third electrically operated valve; 410 b-a second high pressure reservoir; 411 b-a second electrically operated valve; 412 b-a second shut-off valve; 420 b-a third bypass pipe; 421 b-fourth electrically operated valve; 403-a liquid supply solenoid valve; 404-a second ball valve; 405-expansion valve; 430-condensing fans; 500-liquid supply header; 504-a fifth solenoid valve; 510 a-a first liquid supply pipe joint; 510 b-a second liquid supply pipe joint; 520-second angle valve; 600-vacuum pump; 700-cold charging service equipment; 800-a cold storage box; 811-a liquid feed inlet; 812-return air outlet; 820-cold storage unit.

Detailed Description

In order to make the above objects, features and advantages of the present utility model more comprehensible, embodiments accompanied with present utility model are described in detail with embodiments of the present utility model including only some but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1 to 4, the present utility model provides a cooling service apparatus 700 for performing a cooling service for a cold storage box 800, the cooling service apparatus 700 comprising: the low-pressure liquid storage device comprises an air return header 100, a low-pressure liquid storage device 200, a compressor 300, a condenser 400, a liquid supply header 500 and a vacuum pump 600, wherein a first outlet of the air return header 100 is connected with an inlet of the low-pressure liquid storage device 200, an outlet of the low-pressure liquid storage device 200 is connected with an inlet of the compressor 300, an outlet of the compressor 300 is connected with an inlet of the condenser 400, an outlet of the condenser 400 is connected with an inlet of the liquid supply header 500, an inlet of the vacuum pump 600 is connected with a second outlet of the air return header 100 and a second outlet of the liquid supply header 500, and an inlet of the air return header 100, a first outlet of the liquid supply header 500 and the cold storage box 800 are connected.

For example, the present utility model integrates a cooling system, a refrigerant recovery system, and a vacuum system, and can realize cooling, refrigerant recovery, and vacuum of the cold storage box 800. In this embodiment, the cold fill service equipment 700 is provided with at least two high pressure reservoir systems, wherein at least one high pressure reservoir system is used for cold fill and at least one other high pressure reservoir system is used for refrigerant recovery storage.

Specifically, in this embodiment, the high-pressure liquid storage system includes a first high-pressure liquid storage system and a second high-pressure liquid storage system, where the first high-pressure liquid storage system is used for refrigerant recovery storage, and the second high-pressure liquid storage system is used for cold-filling operation. The cooling service equipment 700 operates on the principle that: connecting the cold charging service equipment 700 with the cold accumulation box 800, and starting the vacuum pump 600 to vacuumize the cold accumulation box 800 through a pipeline; after the cold storage box 800 is vacuumized through a pipeline, cold filling service is started, the compressor 300 is started, gas enters the low-pressure liquid storage tank 200 through the air return pipe joint and the air return header 100 under the suction action of the compressor 300, the liquid part of the refrigerant is separated, the gas discharged from the low-pressure liquid storage tank 200 is compressed again by the compressor 300 and becomes high-temperature high-pressure gas, the high-pressure gas is discharged to the condenser 400, the high-pressure medium-temperature liquid is changed into high-pressure medium-temperature liquid after entering the condenser 400, then the high-pressure medium-temperature liquid flows into a second high-pressure liquid storage system, and the liquid in the second high-pressure liquid storage tank 410b is supplied to at least one cold storage box 800 through the liquid supply header 500 and the liquid supply pipe joint under the action of system pressure, so that cold filling of the cold storage box 800 is realized; after the cold charging service of the cold storage tank 800 is completed, the refrigerant recovery service is performed, the compressor 300 is started, and at the suction pressure of the compressor 300, the refrigerant gas reaching the cold storage tank 800 and reaching all the pipelines before the cold storage tank 800 and the compressor 300 after the second ball valve 404 is pumped back, and is condensed and stored in the first high-pressure liquid storage device 410a under the action of the condenser 400. When the suction pressure of the compressor 300 is a negative set pressure value, the refrigerant recovery service is ended; at this time, the connection of the cold charge service equipment 700 to the cold box 800 may be disconnected.

Before the cold charging service, the valves are required to be operated, first, the first electric valve 411a, the third electric valve 421a, the first stop valve 412a, the fourth electric valve 421b, the second ball valve 404, the first ball valve 101, the second angle valve 520, and the first angle valve 120 are closed, and the second electric valve 411b, the second stop valve 412b, the fifth electromagnetic valve 504, the first electromagnetic valve 105, and the sixth electromagnetic valve 186 are opened, so that the second high-pressure reservoir 410b is ensured to be operated during the cold charging process. The liquid supply pipe joint of the cold charging service equipment 700 is connected to the liquid supply inlet 811 of the cold storage tank 800, and the air return pipe joint of the cold charging service equipment 700 is connected to the air return outlet 812 of the cold storage tank 800.

When the cold filling service process is performed, the vacuum pump 600 is started to vacuumize the cold storage box 800, after a period of time is performed in the vacuumizing process, the fifth electromagnetic valve 504, the first electromagnetic valve 105, the sixth electromagnetic valve 186 and the vacuum pump 600 are closed, the second ball valve 404 and the first ball valve 101 are opened, the compressor 300 is started, and meanwhile the liquid supply electromagnetic valve 403 is opened automatically. At this time, the cold charging service device 700 continuously provides low-temperature refrigerant to the cold storage unit 820 in the cold storage box 800, and a heat exchange pipeline is further provided in the cold storage unit 820, and exchanges heat with the cold storage material (X) through the heat exchange pipeline, so that the temperature of the cold storage material (X) is continuously reduced, and after the temperature is reduced to a certain temperature, a phase change occurs, thereby storing a large amount of cold. When the cold service provision 700 ends, the refrigeration system is directly shut down, while the liquid supply solenoid valve 403 is closed.

Before the refrigerant recovery is performed, the second electric valve 411b and the fourth electric valve 421b are closed, the first electric valve 411a is opened, the first high-pressure accumulator 410a is used for the refrigerant recovery storage, and the valves of the first ball valve 101, the fifth electromagnetic valve 504, and the first electromagnetic valve 105 are opened.

During the refrigerant recovery process, the compressor 300 is turned on, and at this time, the refrigerant gas in all the pipes from the second ball valve 404 to the cold storage tank 800 to the front of the compressor 300 is pumped back at the suction pressure of the compressor 300, and condensed and stored in the first high-pressure accumulator 410a by the condenser 400. When the suction pressure of the compressor 300 is a negative set pressure value, the compressor 300 is stopped while the first ball valve 101 is closed. At this time, the pipe connection between the cold charge service equipment 700 and the cold accumulation tank 800 may be disconnected.

Further, referring to fig. 2, at least two high-pressure liquid storage systems, a liquid supply electromagnetic valve 403, a second ball valve 404 and an expansion valve 405 are arranged between the condenser 400 and the liquid supply header 500, the outlet of the condenser 400 is connected with the inlet of the high-pressure liquid storage system, the outlet of the high-pressure liquid storage system is connected with the inlet of the liquid supply electromagnetic valve 403, the outlet of the liquid supply electromagnetic valve 403 is connected with the inlet of the second ball valve 404, the outlet of the second ball valve 404 is connected with the inlet of the expansion valve 405, and the outlet of the expansion valve 405 is connected with the inlet of the liquid supply header 500.

For example, at least two high pressure storage systems are provided between condenser 400 and supply header 500, at least one of which is configured to operate and another of which is configured to recover and store refrigerant as refrigeration. Under the suction action of the compressor 300, the gas sequentially passes through the air return pipe joint, the air return header 100, the low-pressure liquid storage 200 and the compressor 300 to become high-temperature high-pressure gas, the high-temperature high-pressure gas is discharged to the condenser 400, enters the condenser 400 to become high-pressure medium-temperature liquid, and then flows into the high-pressure liquid storage system; under the action of system pressure, liquid in the high-pressure liquid reservoir sequentially passes through a liquid supply electromagnetic valve 403, a second ball valve 404 and an expansion valve 405, and finally liquid is supplied to at least one cold storage box 800 through a liquid supply header 500 and a liquid supply pipe joint, wherein the liquid supply electromagnetic valve 403 is used for controlling the flow rate of liquid refrigerant flowing from the outlet of the high-pressure liquid storage system to the inlet of the second ball valve 404, the second ball valve 404 is used for controlling the flow rate of liquid refrigerant flowing from the outlet of the liquid supply electromagnetic valve 403 to the inlet of the expansion valve 405, and the expansion valve 405 is used for throttling the liquid refrigerant with medium temperature and high pressure into low-temperature and low-pressure wet steam through the expansion valve.

Further, the high pressure reservoir system includes: the outlet of the condenser 400 is connected with the inlet of the electric valve, the outlet of the electric valve is connected with the inlet of the high-pressure liquid storage device, the outlet of the high-pressure liquid storage device is connected with the inlet of the stop valve, and the outlet of the stop valve is connected with the inlet of the liquid supply electromagnetic valve 403; the inlet of the electric valve is connected with the outlet of the stop valve through a second bypass pipe 420a, and a third electric valve 421a is arranged on the second bypass pipe 420 a.

Specifically, in this embodiment, the high-pressure liquid storage system includes a first high-pressure liquid storage system and a second high-pressure liquid storage system, where the first high-pressure liquid storage system is used for refrigerant recovery and storage, and the second high-pressure liquid storage system is used for working; the first high-pressure liquid storage system is at least one high-pressure liquid storage system, and comprises a first electric valve 411a, a first high-pressure liquid storage 410a, a first stop valve 412a and a second bypass pipe 420a, wherein a third electric valve 421a is arranged on the second bypass pipe 420 a; the second high-pressure liquid storage system is at least another high-pressure liquid storage system, and the second high-pressure liquid storage system comprises a second electric valve 411b, a second high-pressure liquid storage 410b, a second stop valve 412b and a third bypass pipe 420b, and a fourth electric valve 421b is arranged on the third bypass pipe 420 b. The first electric valve 411a is used for controlling the on-off of a pipeline on the first high-pressure liquid reservoir 410a, and the second electric valve 411b is used for controlling the on-off of a pipeline on the second high-pressure liquid reservoir 410b; the first high-pressure accumulator 410a is used for refrigerant recovery and storage, and the second high-pressure accumulator 410b is used for cold charging; the first shut-off valve 412a and the second shut-off valve 412b are for facilitating the maintenance of the pipeline; the first high-pressure liquid storage system is provided with a second bypass pipe 420a, so that the first high-pressure liquid storage device 410a can be replaced in time, and the second high-pressure liquid storage system is provided with a third bypass pipe 420b, so that the second high-pressure liquid storage device 410b can be replaced in time; the third and fourth electrically operated valves 421a and 421b are used to control the opening and closing of the second and third bypass pipes 420a and 420 b.

Further, a first bypass pipe 181 is arranged among the liquid supply header 500, the return air header 100 and the vacuum pump 600, an inlet of the first bypass pipe 181 is connected with a second outlet of the liquid supply header 500, an outlet of the first bypass pipe 181 is connected with an inlet of the vacuum pump 600, and an inlet of the first bypass pipe 181 is also connected with a second outlet of the return air header 100; the first bypass pipe 181 is provided with a sixth electromagnetic valve 186, a fifth electromagnetic valve 504 is further arranged between the inlet of the first bypass pipe 181 and the second outlet of the liquid supply header 500, and a first electromagnetic valve 105 is further arranged between the inlet of the first bypass pipe 181 and the second outlet of the return air header 100.

For example, the first bypass pipe 181 is disposed between the liquid supply header 500, the air return header 100 and the vacuum pump 600, and the inlet of the first bypass pipe 181 is connected to the second outlet of the liquid supply header 500 and the second outlet of the air return header 100, and the outlet of the first bypass pipe 181 is connected to the inlet of the vacuum pump 600, i.e. one end of the first bypass pipe 181 is connected to the liquid supply header 500 and the air return header 100, and the other end is connected to the vacuum pump 600, and the first bypass pipe 181 is provided for controlling the vacuum pumping service of the liquid supply header 500 and the air return header 100, and integrating the vacuum system with the cooling system; a sixth solenoid valve 186 is provided on the first bypass pipe 181 for controlling the direction, flow rate, speed, etc. of the fluid in the first bypass pipe 181, the fifth solenoid valve 504 is used for controlling the direction, flow rate, speed, etc. of the fluid between the second outlet of the liquid supply header 500 and the inlet of the first bypass pipe 181, and the first solenoid valve 105 is used for controlling the direction, flow rate, speed of the fluid between the second outlet of the return header 100 and the inlet of the first bypass pipe 181.

Further, an oil separator 304 is provided between the compressor 300 and the condenser 400.

Specifically, the oil separator 304 is connected in series between the compressor 300 and the condenser 400, the oil separator 304 is disposed at an outlet side of the compressor 300, and refrigerant gas discharged from the compressor 300 enters the oil separator 304 for oil-gas separation, and then enters the condenser 400 for condensation. Because the compressor 300 generates high pressure steam during operation, the high pressure steam contains lubricating oil, the lubricating oil can be separated by the oil separator 304, and the amount of lubricating oil brought into the system by the refrigerant can be reduced to the maximum extent, thereby ensuring reliable lubrication of the operating components of the compressor 300 at low ambient temperature.

Further, a condensing fan 430 is provided on the condenser 400.

For example, the condensing fan 430 is disposed on the condenser 400, and the condensing fan 430 rapidly discharges air around the condenser 400 to dissipate heat.

Further, a first ball valve 101 is provided between the return air header 100 and the low pressure reservoir 200.

Specifically, a first ball valve 101 is disposed between the return air header 100 and the low pressure reservoir 200, and the first ball valve 101 is provided to facilitate maintenance of the pipeline and regulation of the associated fluid.

Further, the liquid supply header 500 is provided with a second angle valve 520, and the return header 100 is provided with a first angle valve 120.

For example, the second angle valve 520 and the first angle valve 120 are used to control the flow of the supply header 500 and the return header 100, respectively.

Further, the inlet of the return air header 100 is provided with at least one return air connection, and the outlet of the supply header 500 is provided with at least one supply pipe connection.

Specifically, the inlet of the air return header 100 is provided with at least one air return pipe joint, the outlet of the liquid supply header 500 is provided with at least one liquid supply pipe joint, and the air return pipe joint and the liquid supply pipe joint are respectively connected with the outlet and the inlet of the cold accumulation box 800 to form a closed loop, so that the normal working operation of the cold charging service equipment 700 is ensured; and the number of the air return pipe joints and the number of the liquid supply pipe joints are the same, so that a plurality of groups of air return pipe joints and liquid supply pipe joints can be arranged, and simultaneously, a plurality of cold storage boxes 800 are filled with cold.

Preferably, the first return air pipe joint 110a and the first liquid supply pipe joint 510a are connected with the first cold storage box 800, and cool the cold storage box 800; the second return air pipe joint 110b is connected to the second liquid supply pipe joint 510b and the second cold storage tank 800, and the cold storage tank 800 is charged with cold.

Further, referring to fig. 3 to 4, the cold box 800 includes: at least two cold accumulation units 820; a return air outlet 812, the return air outlet 812 being connected to the inlet of the return air header 100; a liquid supply inlet 811, the liquid supply inlet 811 being connected to the outlet of the liquid supply header 500; wherein the return air outlet 812 and the liquid supply inlet 811 communicate with two cold storage units 820.

For example, the cold storage box 800 includes at least two cold storage units 820, wherein the cold storage units 820 are independent energy storage units, and cold storage materials (X) are contained in the cold storage units, and the cold storage materials (X) need to be placed in a low-temperature environment before each use, so that the internal cold storage materials (X) perform phase change for cold storage; the cold storage box 800 is further provided with a return air outlet 812 and a liquid supply inlet 811, wherein the return air outlet 812 and the liquid supply inlet 811 are communicated with at least two cold storage units 820, and an outlet and an inlet are provided for return air and liquid supply of the cold storage units 820; under the suction action of the compressor 300, the gas enters the low-pressure accumulator 200 through the return gas outlet 812 and the return gas header 100, is compressed again by the compressor 300, becomes high-temperature and high-pressure gas, is discharged to the condenser 400, becomes high-pressure and high-temperature liquid after entering the condenser 400, then flows into the high-pressure accumulator, and then supplies the liquid in the high-pressure accumulator to the cold storage tank 800 through the liquid supply header 500 and the liquid supply inlet 811 under the action of the system pressure.

Preferably, the cold storage box 800 adopts a light flexible heat insulation material, a heat exchange coil is arranged in the cold storage unit 820, a high-density phase change energy storage material is adopted in the cold storage unit 820, and the heat exchange can be performed with low-temperature refrigeration in a heat exchange pipeline in the cold storage unit, so that the phase change of the phase change cold storage material (X) is performed to display the storage of cold energy, and the temperature range of the phase change point of the phase change cold storage material (X) is-30 ℃.

Preferably, the air return pipe joint of the cold charging service equipment 700 and the air return outlet 812 of the cold accumulation tank 800 can be connected through threads, and the threaded connection is easy to assemble and disassemble the cold charging service equipment 700 and the cold accumulation tank 800, and has high stability.

Preferably, the height of the supply header 500 and return header 100 of the cold fill service kit 700 should not be lower than the height of the cold box 800 at the locations of the supply inlet 811 and return outlet 812.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims (10)

1. A cold charging service apparatus that performs a cold charging service for a cold storage tank, the cold charging service apparatus comprising:

the device comprises an air return header, a low-pressure liquid storage device, a compressor, a condenser, a liquid supply header and a vacuum pump, wherein a first outlet of the air return header is connected with an inlet of the low-pressure liquid storage device, an outlet of the low-pressure liquid storage device is connected with an inlet of the compressor, an outlet of the compressor is connected with an inlet of the condenser, an outlet of the condenser is connected with an inlet of the liquid supply header, an inlet of the vacuum pump is connected with a second outlet of the air return header and a second outlet of the liquid supply header, and an inlet of the air return header, a first outlet of the liquid supply header and the cold storage box are connected.

2. The cold-fill service kit of claim 1,

the condenser is provided with at least two high-pressure liquid storage systems, a liquid supply electromagnetic valve, a second ball valve and an expansion valve, wherein the outlet of the condenser is connected with the inlet of the high-pressure liquid storage system, the outlet of the high-pressure liquid storage system is connected with the inlet of the liquid supply electromagnetic valve, the outlet of the liquid supply electromagnetic valve is connected with the inlet of the second ball valve, the outlet of the second ball valve is connected with the inlet of the expansion valve, and the outlet of the expansion valve is connected with the inlet of the liquid supply header.

3. The cold-fill service kit of claim 2,

the high pressure reservoir system includes: the device comprises an electric valve, a high-pressure liquid storage device, a stop valve and a second bypass pipe, wherein the outlet of the condenser is connected with the inlet of the electric valve, the outlet of the electric valve is connected with the inlet of the high-pressure liquid storage device, the outlet of the high-pressure liquid storage device is connected with the inlet of the stop valve, and the outlet of the stop valve is connected with the inlet of the liquid supply electromagnetic valve;

the inlet of the electric valve is connected with the outlet of the stop valve through the second bypass pipe, and a third electric valve is arranged on the second bypass pipe.

4. The cold-fill service kit of claim 1,

a first bypass pipe is arranged among the liquid supply header, the air return header and the vacuum pump, an inlet of the first bypass pipe is connected with a second outlet of the liquid supply header, an outlet of the first bypass pipe is connected with an inlet of the vacuum pump, and an inlet of the first bypass pipe is also connected with a second outlet of the air return header;

the first bypass pipe is provided with a sixth electromagnetic valve, a fifth electromagnetic valve is further arranged between an inlet of the first bypass pipe and a second outlet of the liquid supply header, and a first electromagnetic valve is further arranged between an inlet of the first bypass pipe and a second outlet of the return air header.

5. The cold-fill service kit of claim 1,

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

6. The cold-fill service kit of claim 1,

and a condensing fan is arranged on the condenser.

7. The cold-fill service kit of claim 1,

a first ball valve is arranged between the return air header and the low-pressure liquid storage device.

8. The cold-fill service kit of claim 1,

the liquid supply header is provided with a second angle valve, and the return air header is provided with a first angle valve.

9. The cold fill service kit of claim 1, wherein the inlet of the return air header is provided with at least one return air connection and the outlet of the supply header is provided with at least one supply connection.

10. The cold charging service equipment of claim 1, wherein the cold storage tank comprises:

at least two cold accumulation units;

the air return outlet is connected with the inlet of the air return header;

a liquid supply inlet connected to the outlet of the liquid supply header;

wherein, the return air outlet and the liquid supply inlet are communicated with the two cold accumulation units.

Images