Refrigerant filling pipe

Abstract

The utility model relates to the technical field of refrigerant filling appliances, and discloses a refrigerant filling pipe which comprises a pressure gauge and an exhaust valve, one end of the pressure gauge is provided with a discharge control valve, one end of the discharge control valve is provided with a discharge pipe, the other end of the discharge pipe is provided with an exhaust valve, and the exhaust valve is connected with the discharge pipe. An exhaust valve is installed at the bottom of the pressure gauge, an exhaust port is formed in the bottom of the exhaust valve in a penetrating mode, a discharging connector is installed at one end of the exhaust valve, a feeding pipe is installed at the other end of the pressure gauge, a feeding control valve is installed at the other end of the feeding pipe, and a feeding connector is installed at the other end of the feeding control valve. By arranging the exhaust valve, a worker can conveniently exhaust air in the device, the worker is prevented from directly rotating an equipment connector with hands, and the risk of finger frostbite is avoided, meanwhile, by arranging the ejector pin at the position of the feeding connector, the worker can conveniently connect a refrigerant tank, the time for finding a bottle opener is saved, and the working efficiency is improved. And the applicability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigerant filling appliances, in particular to a refrigerant filling pipe. Background Technique

[0002] Refrigerants, also known as refrigerants or coolants, are the medium substances used in various heat engines to complete energy conversion. These substances usually increase power through reversible phase changes. The commonly used working media in traditional industries and daily life are some halogenated hydrocarbons. However, due to their contribution to the ozone layer depletion, they are gradually phased out. Other widely used ones include sulfur dioxide and non-halogenated hydrocarbons. However, when the refrigerant leaks, it usually absorbs the heat in the air, turns into gas and evaporates, which is extremely harmful to the human body and very dangerous. Refrigerants are usually stored in steel cylinders. When people perform the filling work of refrigerants, special refrigerant filling appliances are needed for filling.

[0003] After retrieval, the Chinese utility model patent with the publication number: CN210892285U discloses a refrigerant filling pipe, which includes a first air extraction pipe, a second air extraction pipe and an injection pipe. An air extraction branch pipe is connected to the first air extraction pipe, an injection branch pipe is connected to the injection pipe, an air extraction valve is fixedly installed on the air extraction branch pipe, and an injection valve is fixedly installed on the injection branch pipe. A recovery branch pipe is fixedly connected to the second air extraction pipe, and a recovery valve is fixedly installed on the recovery branch pipe. A conduit is fixedly connected to the end of the air extraction branch pipe far away from the first air extraction pipe, and the other ends of the injection branch pipe and the recovery branch pipe are both connected to the conduit. The end of the conduit far away from the air extraction pipe is fixedly connected to a hose, and the other end of the hose is fixedly installed with a filling nozzle.

[0004] However, the above technical solution has the following problems. In the above technical solution, by directly installing the filling pipe on the device to which the refrigerant is to be added, the inside of the filling pipe contains a large amount of air. When filling work is carried out, the staff needs to manually rotate the nut at the interface to discharge the air inside. A large amount of refrigerant is also contained in the discharged air. However, when the refrigerant is discharged, it will absorb a huge amount of heat, easily frostbite the hands of the staff, and at the same time, the refrigerant emitted into the air is harmful to the human body. Moreover, when filling the bottled refrigerant, a special refrigerant opener needs to be found to carry out the operation, which is very troublesome. Content of the Utility Model

[0005] The purpose of the utility model is to provide a refrigerant filling pipe to solve the problems in the prior art during the refrigerant addition process. When discharging the air inside the filling pipe, the staff directly rotates the nut at the connection by hand, resulting in hand frostbite. At the same time, when discharging the air inside the filling pipe, a small amount of refrigerant will also be discharged into the air together with the air, affecting the air. At the same time, a refrigerant opener needs to be equipped when taking the bottled refrigerant.

[0006] To achieve the above object, the present utility model provides the following technical solutions: A refrigerant filling pipe, comprising: a pressure gauge and an exhaust valve. One end of the pressure gauge is installed with a discharge control valve. One end of the discharge control valve is installed with a discharge pipe. The other end of the discharge pipe is installed with an exhaust valve. An exhaust port is formed through the bottom of the exhaust valve. One end of the exhaust valve is installed with a discharge joint. The other end of the pressure gauge is installed with a feed pipe. The other end of the feed pipe is installed with a feed control valve. The other end of the feed control valve is installed with a feed joint.

[0007] Further, a feed end retaining piece is installed on the outer edge of the feed joint. One end of the feed joint is installed with a feed end sealing gasket, and the feed end sealing gasket is fitted with the feed end retaining piece.

[0008] Further, a thimble is installed on the outer wall of one side of the feed end retaining piece. A feed port is formed through the outer wall of one side of the thimble, and the feed port is communicated with the feed control valve.

[0009] Further, a discharge end retaining piece is installed on the outer edge of one end of the discharge joint. A discharge end sealing gasket is installed on the outer wall of one side of the discharge end retaining piece.

[0010] Further, connection nuts are respectively fitted on the outer sides of the feed joint and the discharge joint. One end of the connection nut is installed with a fixed block. Air guide grooves are formed on the inner walls of the connection nuts.

[0011] Further, a hook is installed on the outer wall of one side of the pressure gauge, and a dial is provided on the top of the pressure gauge.

[0012] Further, a gas collecting tank is installed at the bottom of the exhaust valve by means of a thread, and the gas collecting tank is communicated with the exhaust port.

[0013] Further, a material channel is formed inside the exhaust valve. A threaded control rod is installed through the top of the exhaust valve. One end of the threaded control rod is installed with a plug, and the plug is adapted to the exhaust port.

[0014] Compared with the prior art, the beneficial effects of the present utility model are:

[0015] The utility model realizes that when the staff needs to fill the refrigerant into the equipment, the staff can first close all the valves in the device according to the actual situation, and then install the device between the equipment and the refrigerant storage tank through the connecting nut. When connecting, the staff aligns the ejector pin with the mouth of the refrigerant storage tank as needed, and then tightens the connecting nut so that the ejector pin can smoothly enter the refrigerant storage tank. Then, the staff can open the inlet control valve and the outlet control valve. Subsequently, the staff can slowly open the exhaust valve to discharge the air in the device into the gas collecting tank through the exhaust port by the pressure of the refrigerant entering the device. Then, tighten the exhaust valve to block the exhaust port, and then tighten the connecting nut connected to the equipment. Then, by controlling the inlet control valve and the outlet control valve, the refrigerant can be filled into the equipment, and the applicability is relatively strong. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the overall structure of a refrigerant filling pipe of the utility model;

[0017] Figure 2 is a schematic diagram of the structure of the outlet joint of a refrigerant filling pipe of the utility model;

[0018] Figure 3 is a sectional view of the exhaust valve of a refrigerant filling pipe of the utility model;

[0019] Figure 4 is a schematic diagram of the structure of the inlet joint of a refrigerant filling pipe of the utility model;

[0020] Figure 5 is a schematic diagram of the structure of the connecting nut of a refrigerant filling pipe of the utility model.

[0021] In the figure: 1 - pressure gauge; 101 - hook; 102 - dial; 103 - outlet control valve; 2 - inlet pipe; 201 - inlet control valve; 202 - outlet pipe; 3 - connecting nut; 301 - fixed stop; 302 - air guide groove; 4 - exhaust valve; 401 - gas collecting tank; 402 - material passage; 403 - exhaust port; 404 - threaded control rod; 405 - plug; 5 - outlet joint; 501 - outlet end stop; 502 - outlet end sealing gasket; 6 - inlet joint; 601 - inlet end stop; 602 - ejector pin; 603 - inlet port; 604 - inlet end sealing gasket. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0023] Please refer to Figures 1 - 5 , the present utility model provides a technical solution: a refrigerant filling pipe, comprising: a pressure gauge 1 and an exhaust valve 4. A hook 101 is installed on the outer wall of one side of the pressure gauge 1. By installing the hook 101, it is convenient for the staff to hang the device, facilitating the operation of the staff. A dial 102 is provided at the top of the pressure gauge 1. The staff can observe the change of the pointer on the dial 102 by controlling each valve in the device, so as to understand the change of the pressure in the equipment and adjust the output rate of the refrigerant. One end of the pressure gauge 1 is installed with a discharge control valve 103. The staff can observe the pressure in the refrigerant storage tank through the discharge control valve 103 and the dial 102 to understand the remaining refrigerant inventory. One end of the discharge control valve 103 is installed with a discharge pipe 202. The other end of the discharge pipe 202 is installed with an exhaust valve 4. An exhaust port 403 is formed through the bottom of the exhaust valve 4. A material channel 402 is opened inside the exhaust valve 4, and the material channel 402 is communicated with the exhaust port 403. A threaded control rod 404 is installed through the top of the exhaust valve 4. One end of the threaded control rod 404 is installed with a plug 405, and the plug 405 is adapted to the exhaust port 403. One end of the exhaust valve 4 is installed with a discharge joint 5. The bottom of the exhaust valve 4 is installed with a gas collecting tank 401 through threads, and the gas collecting tank 401 is communicated with the exhaust port 403. The staff can control the valves in the device to push the air in the device into the gas collecting tank 401 by the refrigerant in the refrigerant storage tank, thereby reducing the diffusion of the refrigerant into the air and affecting the air quality.

[0024] At the other end of the pressure gauge 1, a feed pipe 2 is installed. At the other end of the feed pipe 2, a feed control valve 201 is installed. The staff can close the feed control valve 201 and the exhaust valve 4 to know the pressure of the remaining refrigerant in the equipment that needs to be filled with refrigerant. At the other end of the feed control valve 201, a feed joint 6 is installed. At the outer edge of the feed joint 6, a feed end retaining piece 601 is installed. At one end of the feed joint 6, a feed end sealing gasket 604 is installed, and the feed end sealing gasket 604 is fitted with the feed end retaining piece 601; on one outer wall of the feed end retaining piece 601, a thimble 602 is installed. An inlet 603 is formed through one outer wall of the thimble 602, and the inlet 603 is communicated with the feed control valve 201; at the outer edge of one end of the discharge joint 5, a discharge end retaining piece 501 is installed. On one outer wall of the discharge end retaining piece 501, a discharge end sealing gasket 502 is installed. Connecting nuts 3 are respectively fitted on the outer sides of the feed joint 6 and the discharge joint 5. At one end of the connecting nut 3, a fixed stop 301 is installed. Air guide grooves 302 are respectively formed in the inner walls of the connecting nuts 3. During the connection process of the device by the staff, the staff needs to align the thimble 602 at the feed joint 6 with the refrigerant storage tank, and then tighten the connecting nut 3. Under the action of the feed end retaining piece 601 and the fixed stop 301, the thimble 602 can enter the refrigerant storage tank, so that the refrigerant can enter the device through the inlet 603 on the outer side of the thimble 602.

[0025] Working principle: When the staff needs to fill the refrigerant into the equipment, the staff can first close all the valves in the device according to the actual situation, and then install the device between the equipment and the refrigerant storage tank through the connecting nut 3. When connecting, the staff aligns the thimble 602 with the tank mouth of the refrigerant storage tank as needed, and then tightens the connecting nut 3 so that the thimble 602 can smoothly enter the refrigerant storage tank. Then the staff can open the feed control valve 201 and the discharge control valve 103. Then the staff can slowly open the exhaust valve 4 to discharge the air in the device into the gas collecting tank 401 through the exhaust port 403 by the pressure of the refrigerant entering the device. Then tighten the exhaust valve 4 to block the exhaust port 403, and then tighten the connecting nut 3 connected to the equipment. Then, by controlling the feed control valve 201 and the discharge control valve 103, the refrigerant filling work of the equipment can be carried out, and the applicability is relatively strong.

[0026] Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Claims

1. A refrigerant filling pipe, comprising: A pressure gauge (1) and an exhaust valve (4), characterized in that: one end of the pressure gauge (1) is equipped with a discharge control valve (103), one end of the discharge control valve (103) is equipped with a discharge pipe (202), the other end of the discharge pipe (202) is equipped with an exhaust valve (4), the bottom of the exhaust valve (4) is provided with an exhaust port (403) through it, one end of the exhaust valve (4) is equipped with a discharge joint (5), the other end of the pressure gauge (1) is equipped with a feed pipe (2), the other end of the feed pipe (2) is equipped with a feed control valve (201), and the other end of the feed control valve (201) is equipped with a feed joint (6).

2. The refrigerant filling pipe according to claim 1, characterized in that: An inlet end retaining piece (601) is installed on the outer edge of the feed joint (6), and an inlet end sealing gasket (604) is installed at one end of the feed joint (6), and the inlet end sealing gasket (604) is in contact with the inlet end retaining piece (601).

3. The refrigerant filling pipe according to claim 2, wherein: A thimble (602) is installed on the outer wall of one side of the inlet end retaining piece (601), and an inlet port (603) is provided through the outer wall of one side of the thimble (602), and the inlet port (603) is communicated with the feed control valve (201).

4. A refrigerant filling pipe according to claim 1, characterized in that: A discharge end retaining piece (501) is installed on the outer edge of one end of the discharge joint (5), and a discharge end sealing gasket (502) is installed on the outer wall of one side of the discharge end retaining piece (501).

5. A refrigerant filling pipe according to claim 1, characterized in that: Both the outer sides of the feed joint (6) and the discharge joint (5) are fitted with connecting nuts (3), a fixed block (301) is installed at one end of the connecting nut (3), and air guiding grooves (302) are provided on the inner walls of the connecting nuts (3).

6. A refrigerant filling pipe according to claim 1, characterized in that: A hook (101) is installed on the outer wall of one side of the pressure gauge (1), and a dial (102) is provided on the top of the pressure gauge (1).

7. A refrigerant filling pipe according to claim 1, characterized in that: A gas collecting tank (401) is installed at the bottom of the exhaust valve (4) by means of threads, and the gas collecting tank (401) is communicated with the exhaust port (403).

8. A refrigerant filling pipe according to claim 1, characterized in that: A material channel (402) is provided inside the exhaust valve (4), a threaded control rod (404) is installed through the top of the exhaust valve (4), a plug (405) is installed at one end of the threaded control rod (404), and the plug (405) is adapted to the exhaust port (403).

Images