KR900003604A - Refrigerant Automatic Filling Device - Google Patents

Abstract

No content.

Description

Refrigerant Automatic Filling Device

Since this is an open matter, no full text was included.

1 is a perspective view of an automatic refrigerant charging device configured by way of example according to the present invention.

2 is an overall piping configuration that is the main part of the present invention.

3 is a sequence circuit diagram showing an operating state of the present invention.

4 is a block diagram of the oil suction device of the present invention.

Claims (7)

In constructing the refrigerant charging device using the vacuum pump, the seventh solenoid valve SV ₇ and the second solenoid valve SV ₂ are coupled to the suction line 2 and the discharge line 3 of the vacuum pump 1, respectively. While being installed, the sixth solenoid valve (SV ₆ ) is provided at one end of the suction pipe passage (2) and is connected to the low pressure gauge (6) as the low pressure transfer pipe passage (5a), and the end portion is connected to the refrigerant bottle (14). The oil suction pipe line 4 provided with the conduit 5, the 8th solenoid valve SV8, and the 5th solenoid valve SV ₅ , and the 2nd which has the 9th solenoid valve SV ₉ in one side part are provided. The bypass pipe line 7 in which the air discharge line 22 is installed is connected and installed, and the discharge line 3 includes a first air discharge line 10 having a third solenoid valve SV ₃ and a fourth electron. High pressure transmission pipe line having a valve (SV ₄ ) and connected to the airtight state check means in which oil is built, and a first solenoid valve (SV ₁ ) and provided with a high pressure cut-off switch (12). To (11a) Connected to the high-pressure meter (13), and connected to the end portion of the bypass line (7) on one side and at the same time the selector switch is located in the control unit is connected to the compressor connecting line (11) connected to the refrigeration unit (SW ₁ … SW ₄ ) and a relay to selectively operate the solenoid valves SV ₁ … SV ₉ to perform internal pressure test, airtight test, refrigerant charge and oil suction of the refrigerating device. Refrigerant automatic charging device for. The pressure resistance test according to claim 1, wherein the _first , _second , _seven , _eight solenoid valves SV ₁ , SV ₂ , SV ₇ , SV ₈ and the vacuum are operated by a relay when the first selection switch SW ₁ is turned on. The pump (1) is operated so that the oil suction line (4)-suction line (2)-discharge line (3)-compressor connecting line (1) is opened so that the compressed air is supplied to the refrigeration unit Refrigerant Automatic Charging Device. The method of claim 1, wherein the airtightness inspection is performed by the _ninth and _third solenoid valves SV ₉ and SV ₃ having the timers T ₁ and T ₂ through the relay R ₃ when the second selection switch SW ₂ is turned on. ₉ ) The 9th solenoid valve (SV ₉ ) is cut off, and then the other relay relays the vacuum pump (1) and the ₂ , ₅ , ₆ , 7 solenoid valves (SV ₂ , SV ₅ , SV _6). , SV ₇ ) is operated to maintain the vacuum state inside the freezing device, the automatic refrigerant charging device for a refrigerator. According to claim 1, Refrigerant charging, the _fifth and sixth solenoid valves (SV ₅ , SV ₆ ) is operated by the relay during the ON operation of the fourth selection switch (SW ₄ ) to cool the refrigerant in the refrigerant bottle 14 Filled into the refrigeration unit in a vacuum state through the refrigerant connection pipe (5) -bypass pipe (7) -compressor connection pipe (11), the power is supplied to the outlet 21 after the time set in the timer (T ₄ ), Refrigerant automatic charging device for a refrigerator, characterized in that to be activated to the refrigerator to be charged coupled to the plug. The oil suction of claim 1, wherein the oil suction is connected to the _second , _third , _seventh and eightth solenoid valves SV ₂ , SV ₃ , SV ₇ , and SV ₈ by a corresponding relay when the third selection valve SW ₃ is turned on. The vacuum pump 1 is operated so that the air sucked from the oil suction pipe line 4 is blown into the first air discharge pipe line 10, so that the oil suction device having the storage tank and the connection pipe is connected to the oil suction pipe line or the like. Refrigerant automatic charging device for a refrigerator, characterized in that by connecting to the first air discharge line to remove the waste oil in the compressor and supply of new oil. The oil suction device (15) according to claim 5, wherein the oil suction device (15) includes an oil storage tank (16) provided with a first connecting pipe (17) at an upper side and a drain valve (18) for discharging waste oil at a lower side thereof. 20), and one side end portion is located through the side wall of the oil storage tank while the other end portion is a refrigerant automatic charging device for a refrigerator, characterized in that it is composed of a second connecting pipe (19) connected to the oil supply port of the compressor. . The refrigerant automatic charging device for a refrigerator according to claim 1, wherein each of the solenoid valves (SV ₁ ... SV ₆ ) is connected to and installed with an operating state indicator lamp (LP ₁ ... SP ₉ ). ※ Note: The disclosure is based on the initial application.