JPH0451327Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is applied to a car used to replenish refrigerant gas in an automobile air conditioner or cooler (hereinafter referred to as an air conditioner) and lubricating oil that circulates with the refrigerant gas. This relates to gas/oil chargers for air conditioners.

[Prior Art] Conventionally, when replenishing a car air conditioner with refrigerant gas and lubricating oil, as shown in FIG. Separator 42
The oil in the oil separator 42 was supplied to the air conditioner 33 in conjunction with the supply of refrigerant gas from the gas charger 35.

[Problems to be solved by the invention] However, in the above case, each time the air conditioner 33 is refilled with oil in the oil separator 42, the oil separator 42 must be separated and the oil separator 42 must be filled with oil. First, replenishing the oil separator 42 with oil and separating and assembling the oil separator 42 each time it is refilled requires time and effort, and it is not possible to replenish the air conditioner 33 mainly with oil.

Therefore, the present invention does not require time and effort to replenish refrigerant gas and oil, and can easily replenish mainly refrigerant gas or oil.Furthermore, oil and refrigerant gas can be refilled from the oil can when connecting the oil can. The purpose is to provide a gas/oil charger for car air conditioners that prevents leakage.

[Means for Solving the Problems] That is, the oil/gas charger for a car air conditioner of the present invention forms a three-pronged pipe body including an oil supply inlet, a gas supply inlet, and an air conditioner connection outlet. The supply inlet is equipped with a check valve.
A manually operated check valve that opens manually is connected to the oil supply inlet, and a can connecting pipe equipped with an oil can connecting port is connected to the inlet side of the check valve. It is characterized by being equipped with a punching tool that can be moved forward and backward by manual operation.

[Function] When using this gas/oil charger, connect the air conditioner connection outlet to the low pressure side connection port of the air conditioner via a hose, and then manually operate the manually operated check valve. It will open for a few seconds. As a result, the air inside the hose pushed by the refrigerant gas from the air conditioner escapes to the outside through the manually operated check valve and the oil can connection port of the can connection pipe. restore to state.

Next, oil or refrigerant gas is replenished. That is, when replenishing oil, an oil can containing charging refrigerant gas and oil is connected to an oil can connection port, and then a hole is punched in the oil can by manually moving the punching tool back and forth. As a result, the oil and refrigerant gas flow to the air conditioner connection outlet side through the can connection pipe and the manually operated check valve.

[Embodiment] Next, an embodiment of the present invention shown in Figs. A fork-like tube body 22 is formed, and these nipples 2, 3,
4 are respectively used as an oil supply inlet 23, an air conditioner connection outlet 6, and a gas supply inlet 24, and the oil supply inlet 23 is connected to an oil charge section 5.

The oil charge section 5 has a tubular main body 7 whose base end is screwed into the oil supply inlet 23, a bent tubular can connecting pipe 9 connected to the tip of the main body 7, and a through hole 11 that is slidably fitted into the main body 7. Poppet type check valve 12 and nipple 2
A lever shaft 1 having a spring 13 stretched therebetween to normally close the check valve 12 and a lever 14 attached to the outer end.
5 is supported on the main body 7 by a bearing 16, and the lever shaft 1
5 is disposed in a cavity 18 provided in the main body 7 between the can connecting pipe 9 and the check valve 12, so that the cam 17 presses the check valve 12 at a predetermined rotational position to open it. I have to.

An oil can connection port 8 is formed at the lower end of the can connection pipe 9, and a rod-shaped punching tool 10 with a knob 25 is screwed into the upper part of the can connection pipe 9. faces inward of the oil can connection port 8.

A poppet type check valve 20 with a through hole 19 is slidably fitted into the gas supply inlet 24, and the check valve 20 is normally closed by a spring 21 housed in the nipple 4, so that the tip of the check valve 20 is closed to the gas. Supply inlet 24
protrudes at the edges.

Gas/oil charger 31 made like this
When in use, after connecting the outlet 6 to the low pressure side connection port of the air conditioner 33 via the hose 32, the lever shaft 1 is connected by operating the lever 14 as shown in FIG.
5, the cam 17 is rotated, and the cam 17 pushes the check valve 12 to open it. As a result, the air in the hose 32 pushed by the refrigerant gas of the air conditioner 33 escapes to the outside through the open check valve 12 and the oil can connection port 8 of the can connection pipe 9.
1 to 2 seconds after the opening operation of step 2, the lever 14 is returned to its original position, and the check valve 12 is restored to its normal state by the action of the spring 13.

Next, oil or refrigerant gas is replenished.

That is, when replenishing oil, the oil can 34 containing refrigerant gas and oil for oil charge is used.
After screwing into the oil can connection port 8, by rotating the knob 25, screw the punching tool 10 as shown by the imaginary line 27 in FIG. At dawn, return the punching tool 10 to its original position. This causes the oil and refrigerant gas in the oil can 34 to flow from the oil can connection port 8 through the can connection pipe 9 to the check valve 1.
2 is opened against the spring 13 and flows to the outlet 6 side. Therefore, the operation of the air conditioner 33 causes the air conditioner 3 to
This oil and gas is drawn into 3.

In addition, when replenishing refrigerant gas, the gas supply inlet 2 is connected to the gas charger 35 via the hose 36.
At this time, the cap of the hose 36 (not shown) inserts the end of the check valve 20 to open the check valve 20, and by this and the operation of the gas charge machine 35, the refrigerant gas in the gas charge machine 35 is discharged. flows to the outlet 6 side through the check valve 20. Therefore, as above, air conditioner 3
3, this refrigerant gas is drawn into the air conditioner 33.

[Effects of the invention] As described above, in the present invention, replenishment of refrigerant gas can be performed from the gas supply inlet and replenishment of oil can be performed from the oil can connection port, so replenishment of refrigerant gas and oil can be done without much effort. It is not necessary, and it is easy to replenish mainly oil.Furthermore, by manually opening the check valve, air can be easily vented from the connecting hose before supplying oil or refrigerant gas. After connecting the oil can to the oil can connection port, a hole can be made in the oil can using a punching tool, which prevents oil and refrigerant gas from leaking to the outside when connecting the oil can. can.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional view of one embodiment of the present invention, Fig. 2 is a partial longitudinal cross-sectional view for explaining its operation, Fig. 3 is a system diagram of its usage, and Fig. 4 is a diagram of its usage system of a conventional example. be. 6... Outlet, 8... Oil can connection port, 9... Can connection pipe, 10... Punching tool, 12... Check valve, 20
... Check valve, 22 ... Pipe body, 23, 24 ... Inlet.

Claims (1)

[Scope of utility model registration request] It has an oil supply inlet, a gas supply inlet, and an air conditioner connection outlet to form a three-pronged pipe, the gas supply inlet is equipped with a check valve, and the oil supply inlet is equipped with a manual opening valve. An operated check valve is connected, a can connecting pipe equipped with an oil can connecting port is connected to the inlet side of the check valve, and a punching tool that is moved forward and backward by manual operation is attached to the can connecting pipe. Gas/oil charger for car air conditioners.