JPS5933836Y2 - Refrigerant charge valve - Google Patents

Description

[Detailed description of the invention] This invention relates to the improvement of a refrigerant charge valve provided in a refrigerant charging device that charges refrigerant to an air-conditioning device of an automobile, etc. It has a simple structure and is designed to prevent dust from entering the refrigerant, which tends to occur when the refrigerant can is opened. This prevents contamination with water, etc.

Detailed description will be given below with reference to the embodiment shown in the drawings. Reference numeral 1 denotes a charge valve body, which is connected to a compressor or the like of an air-conditioning device filled with refrigerant through a filling hose 2.

Reference numeral 3 denotes a refrigerant can mounting part in which the upper part of the charge valve main body 1 is recessed and a screw groove 5 is formed on the inner wall of this recessed part so that the refrigerant can 4 can be screwed into the refrigerant can mounting part, and the bottom part is in pressure contact with the end of the refrigerant can 4. A gasket 6 is provided to prevent refrigerant leakage.

7 is a cutting blade for opening the refrigerant can that protrudes from the center of the bottom of the refrigerant can attachment part 3 into the attachment part 3, and is made by cutting one end of a hollow material diagonally into the shape of a syringe needle, and is screwed into the attachment part 3. The refrigerant can be cut into the end of the refrigerant can 4 and the refrigerant is obtained from the hollow part of the cutting blade 7.

Reference numeral 8 denotes a check valve provided below the cutting blade 7, which is normally fitted with a spring 9.
It is in a closed state by the biasing force of the cutting blade 7, and is opened by the refrigerant pressure applied from the hollow part of the cutting blade 7, and its purpose is to prevent the backflow of refrigerant.

Reference numeral 10 denotes an escape hole that is formed in a part of the bottom circumferential wall of the refrigerant can mounting part 3 and communicated with the outside, and the refrigerant can 4 is opened by the cutting blade 7 when the refrigerant can 4 is screwed into the mounting part 3. Tekara Patsukin 6
Impurities such as dust and water inside the mounting part 3 are removed by the pressure of the refrigerant leaking into the mounting part 3 until the pressure is applied to the escape hole 1.
It is designed so that it can be discharged to the outside from 0.

Reference numeral 11 denotes a discharge pipe communicating with the escape hole 10, which guides and discharges the waste from the escape hole to an appropriate location. This prevents contamination caused by the discharged materials and adverse effects on the peripheral equipment.

Reference numeral 12 denotes a refrigerant filling device equipped with this charge valve main body 1, for example, and is provided with charge valves 1, each of which is connected to a plurality of refrigerant can attachment ports 13 that are opened upward.

This invention is constructed as described above, and in a refrigerant charge valve having a refrigerant can mounting part and a cutting blade for opening the refrigerant can protruding from the center of the refrigerant can mounting part, the bottom peripheral wall of the refrigerant can mounting part is Since a part of the refrigerant can is drilled to form an escape hole that communicates with the outside, dust, water, etc. tend to adhere to the refrigerant can attachment part 3, which is exposed to the outside, especially upwardly as shown in the filling device 12 shown in the figure. In a device that opens the refrigerant can attachment port 13, it is difficult to prevent dust from entering, and when the refrigerant can 4 is loaded, these dust, water, etc. mix into the refrigerant as impurities, leading to performance deterioration and failure of the filled refrigerant device. However, in the device according to this invention, even if dirt, water, etc. adhere to the mounting part 3, the escape hole 10 is provided in the mounting part 3, so that it is not necessary to open the refrigerant can. Dust, water, etc. can be discharged to the outside by the blowing pressure of the refrigerant that occasionally leaks into the mounting portion 3, and refrigerant can be reliably filled without contamination with impurities.

In addition, in general, in this type of refrigerant filling equipment, before the filling operation, the inside of the cooling device is evacuated using a vacuum pump to create a negative pressure and the filling operation is made more efficient. However, since the escape hole 10 is provided, when the refrigerant line 4 is unsealed, The air inside the charge valve can be discharged at the same time as the dust, water, etc., and refrigerant charging can be carried out very efficiently.

[Brief explanation of the drawing]

FIG. 1 is an explanatory view showing an embodiment of the invention, FIG. 2 is an explanatory view showing the refrigerant can being loaded in FIG. 1, and FIG. 3 is an external view of an apparatus using the charge valve according to the invention. 1 is a charge valve body, 3 is a refrigerant line attachment part, 4 is a refrigerant line, 7 is a cutting blade for opening the refrigerant can, and 10 is an escape hole.

Claims (1)

[Scope of utility model registration request] In a refrigerant charge valve having a refrigerant can mounting part and a cutting blade for opening the refrigerant can protruding from the center of the refrigerant can mounting part, a part of the bottom peripheral wall of the refrigerant can mounting part is bored to communicate with the outside. A refrigerant charge valve formed with a relief hole.