CN210242110U - 777 Freon filling system for airplane and refrigerator - Google Patents

Abstract

The utility model discloses a 777 airplane freezer Freon filling system, which comprises a stop valve, a pressure gauge, a refrigerant filling device, a nitrogen tank, a helium tank, a vacuum pump, a check valve, a container, a drying filter, a refrigerant recovery unit, a recovered refrigerant storage container and a rack assembly; when the test board works, nitrogen or helium is filled in, and a vacuum pump pumps out residual Freon and nitrogen or helium in the system to clean residual substances in the system; the switching of filling and residual substance removal of the compressor is realized by adjusting a change-over switch on the panel, and the filling pressure and the extraction pressure in the system can be visually read by observing a pressure gauge; the pressure regulation of the vacuum pump adopts stepless speed regulation, and the operation is carried out from small to large, so that the damage to the compressor caused by overhigh pressure in the initial extraction process is avoided. The working strength of testing personnel can be reduced, the accuracy of the testing result is improved, the requirements of users on guarantee and maintainability are met, and the market prospect is considerable.

Description

777 Freon filling system for airplane and refrigerator

Technical Field

The utility model belongs to avionics equipment test field, in particular to freon fills system of irritating that is used for 777 aircraft refrigerator-freezer specially.

Background

The airplane refrigerator belongs to airplane kitchen facilities, provides frozen food, beverages and the like for passengers, and improves the riding experience of the passengers. 777 said refrigerator has a compressor as its core component, said compressor is different from general compressor, its features are high speed, high refrigerating efficiency and high working strength, so the Freon proportion is very critical. For more precise charging of freon, a dedicated charging system needs to be designed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a 777 aircraft refrigerator-freezer freon fills system of irritating to the realization fills the accurate control of irritating to 777 aircraft refrigerator-freezer freon.

In order to achieve the above object, the utility model provides a following technical scheme:

a777 Freon charging system for airplane and refrigerator comprises a first stop valve, a second stop valve, a first pressure gauge, a second pressure gauge, a third stop valve, a fourth stop valve, a refrigerant charging device, a nitrogen tank, a fifth stop valve, a helium tank, a sixth stop valve, a micron-sized pressure gauge, a seventh stop valve, a vacuum pump, a check valve, a container, a drying filter, a refrigerant recovery unit, an eighth stop valve, a recovered refrigerant storage container and a rack assembly;

the rack assembly is respectively connected with the first stop valve and the second stop valve through two hoses and then respectively connected with two ends of a three-way joint, the third end of the three-way joint is divided into two paths through the hoses, one path of the three-way joint is connected with the third stop valve and then connected with the first joint, the other path of the three-way joint is connected with the fourth stop valve and then connected with the second joint, the first stop valve is provided with the first pressure gauge, and the second stop valve is provided with the second pressure gauge; the output end of the refrigerant filling device is connected with a filling joint through a hose; the output end of the nitrogen tank is connected with the fifth stop valve through a hose and then is connected with a nitrogen joint; the output end of the helium tank is connected with the sixth stop valve through a hose and then is connected with a helium connector; the filling joint, the nitrogen joint and the helium joint are respectively connected with the first joint; the input end of the vacuum pump is sequentially connected with the seventh stop valve and the micron-sized pressure gauge through hoses and then connected with an extraction joint; the input end of the container is connected with the check valve through a hose and then is connected with a residue discharge joint; the input end of the recovered refrigerant storage container is sequentially connected with the eighth stop valve, the refrigerant recovery unit and the drying filter through hoses and then is connected with a recovery joint; the extraction joint, the residue discharge joint and the recovery joint are respectively connected with the second joint.

Due to the adoption of the scheme, the beneficial effects of the utility model are that:

the utility model discloses a 777 airplane freezer Freon filling system, which is a function test board specially used for 777 airplane freezer Freon filling, and realizes the accurate adjustment of pressure during filling according to CMM manual; when the test board works, nitrogen or helium is filled in, and a vacuum pump pumps out residual Freon and nitrogen or helium in the system to clean residual substances in the system; the switching of filling and residual substance removal of the compressor is realized by adjusting a change-over switch on the panel, and the filling pressure and the extraction pressure in the system can be visually read by observing a pressure gauge; the pressure regulation of the vacuum pump adopts stepless speed regulation, and the operation is carried out from small to large, so that the damage to the compressor caused by overhigh pressure in the initial extraction process is avoided. The utility model discloses can reduce tester's working strength, improve the accuracy of test result, satisfy user's guarantee nature, maintainability demand, market prospect is considerable.

Drawings

FIG. 1 is a schematic diagram of a 777 Freon charging system for an airplane ice chest.

Description of reference numerals: the system comprises a first stop valve 1, a second stop valve 2, a first pressure gauge 3, a second pressure gauge 4, a third stop valve 5, a fourth stop valve 6, a refrigerant filler 7, a nitrogen tank 8, a fifth stop valve 9, a helium tank 10, a sixth stop valve 11, a micron-sized pressure gauge 12, a seventh stop valve 13, a vacuum pump 14, a check valve 15, a container 16, a drying filter 17, a refrigerant recovery unit 18, an eighth stop valve 19, a recovered refrigerant storage container 20 and a bench assembly 21.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1, the system components of the present invention include: the system comprises a first stop valve 1, a second stop valve 2, a first pressure gauge 3, a second pressure gauge 4, a third stop valve 5, a fourth stop valve 6, a refrigerant charger 7, a nitrogen tank 8, a fifth stop valve 9, a helium tank 10, a sixth stop valve 11, a micron-sized pressure gauge 12, a seventh stop valve 13, a vacuum pump 14, a check valve 15, a container 16, a drying filter 17, a refrigerant recovery unit 18, an eighth stop valve 19, a recovered refrigerant storage container 20 and a bench assembly 21.

As shown in fig. 1, the system connection mode of the present invention is: the rack assembly 21 is respectively connected with a first stop valve 1 and a second stop valve 2 through two hoses and then respectively connected with two ends of a three-way joint, the third end of the three-way joint is divided into two paths through the hoses, one path is connected with a first joint after being connected with a third stop valve 5, the other path is connected with a second joint after being connected with a fourth stop valve 6, a first pressure gauge 3 is installed on the first stop valve 1, and a second pressure gauge 4 is installed on the second stop valve 2; the output end of the refrigerant filling device 7 is connected with a filling joint through a hose; the output end of the nitrogen tank 8 is connected with a fifth stop valve 9 through a hose and then is connected with a nitrogen joint; the output end of the helium tank 10 is connected with a sixth stop valve 11 through a hose and then is connected with a helium connector; the filling joint, the nitrogen joint and the helium joint are respectively connected with the first joint; the input end of the vacuum pump 14 is sequentially connected with a seventh stop valve 13 and a micron-sized pressure gauge 12 through hoses and then is connected with an extraction joint; the input end of the container 16 is connected with the residual discharge joint after being connected with the check valve 15 through a hose; the input end of the recovered refrigerant storage container 20 is connected with an eighth stop valve 19, a refrigerant recovery unit 18 and a drying filter 17 in sequence through hoses and then is connected with a recovery joint; the extraction joint, the residue discharge joint and the recovery joint are respectively connected with the second joint. The refrigerant charger 7, the refrigerant recovery unit 18, and the stand assembly 21 are conventional in structure.

As shown in fig. 1, the working method of the present invention is: the utility model is a function test board specially used for 777 airplane freezer Freon filling, which is used for realizing the accurate adjustment of pressure during filling; when the test board works, firstly, nitrogen is filled in through the nitrogen tank 8, or helium is filled in through the helium tank 10, and the residual freon and nitrogen or helium in the system are pumped out through the vacuum pump 14 to clean residual substances in the system; the refrigerant is charged through the refrigerant charger 7; the switching of filling and residual substance removal can be realized by adjusting the change-over switch on the panel; the removal of the residual substances is achieved by means of a non-return valve 15 and a container 16; observing the pressure gauge, and visually reading the filling pressure and the extraction pressure in the system through the first pressure gauge 3, the second pressure gauge 4 and the micron-sized pressure gauge 12; the pressure regulation of the vacuum pump 14 adopts stepless speed regulation, and the operation is carried out from small to large, so that the damage to a compressor caused by overhigh pressure in the initial extraction process is avoided; after the charging is completed, the remaining refrigerant is recovered by the refrigerant recovery unit 18 and the recovered refrigerant storage container 20.

The embodiments described above are described to facilitate understanding and application of the present patent to those of ordinary skill in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the embodiments herein, and those skilled in the art should understand that modifications and alterations made without departing from the scope of the present invention are within the protection scope of the present invention.

Claims (1)

1. A777 airplane refrigerator freon filling system, its characteristic lies in: the system comprises a first stop valve, a second stop valve, a first pressure gauge, a second pressure gauge, a third stop valve, a fourth stop valve, a refrigerant filling device, a nitrogen tank, a fifth stop valve, a helium tank, a sixth stop valve, a micron-sized pressure gauge, a seventh stop valve, a vacuum pump, a check valve, a container, a drying filter, a refrigerant recovery unit, an eighth stop valve, a recovered refrigerant storage container and a rack assembly;

the rack assembly is respectively connected with the first stop valve and the second stop valve through two hoses and then respectively connected with two ends of a three-way joint, the third end of the three-way joint is divided into two paths through the hoses, one path of the three-way joint is connected with the third stop valve and then connected with the first joint, the other path of the three-way joint is connected with the fourth stop valve and then connected with the second joint, the first stop valve is provided with the first pressure gauge, and the second stop valve is provided with the second pressure gauge; the output end of the refrigerant filling device is connected with a filling joint through a hose; the output end of the nitrogen tank is connected with the fifth stop valve through a hose and then is connected with a nitrogen joint; the output end of the helium tank is connected with the sixth stop valve through a hose and then is connected with a helium connector; the filling joint, the nitrogen joint and the helium joint are respectively connected with the first joint; the input end of the vacuum pump is sequentially connected with the seventh stop valve and the micron-sized pressure gauge through hoses and then connected with an extraction joint; the input end of the container is connected with the check valve through a hose and then is connected with a residue discharge joint; the input end of the recovered refrigerant storage container is sequentially connected with the eighth stop valve, the refrigerant recovery unit and the drying filter through hoses and then is connected with a recovery joint; the extraction joint, the residue discharge joint and the recovery joint are respectively connected with the second joint.

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