JPH09152234A - Method and apparatus for charging fluorine refrigerant - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to suppress the composition change and to charge accurate refrigerant charging amount when fluorine refrigerant is charged in various apparatus by metering the necessary charging amount by a metering vessel from a vessel liquid phase part charged with the refrigerant and then charging the entire amount in a gaseous state. SOLUTION: In the case of charging a fluorine refrigerant, a refrigerant vessel 70 is connected to connecting means 2, connecting means 10 is connected to the charge port 51 of a cooler 50, opening/closing valves V6 to V8 are opened, and a vacuum pump 9 is operated. The fact that a refrigerating circuit and vaporizer 4 become vacuum therein is confirmed by a pressure gage PG2, and the valves V6 to V8 are closed. Then, valves V1 to V4 are opened, and necessary amount of refrigerant is transferred to a metering vessel 3 while observing a level gage 3e and flowmeter FG. Thereafter, the valves V1 to V4 are closed, the valves V5, V8 are opened, liquid refrigerant in the vessel 3 is fed out to the vaporizer 4, and then the valve V5 is closed. The liquid refrigerant evaporated and vaporized by the vaporizer 4 is charged in a charger 50.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filling method and an apparatus for preventing a change in the refrigerant composition when a fluorine-based refrigerant is metered and filled. It can be used in all fields, such as filling refrigerant in service cans.

[0002]

2. Description of the Related Art In recent years, chlorofluorocarbon (hereinafter referred to as C)
The environmental problem of ozone layer depletion due to the influence of FC) is drawing attention, and it has been decided to abolish it at the end of 1995. Also, regarding hydrochlorofluorocarbons (hereinafter referred to as HCFCs), which have little effect on ozone layer depletion,
It will eventually be abolished.

Therefore, as a substitute for these CFCs and HCFCs, it has been promising to adopt a hydrofluorocarbon (hereinafter referred to as HFC) type fluorine-based refrigerant which has no influence on ozone layer depletion. For example, Japanese Patent Publication No. 6-5594
2 includes difluoromethane (HFC-32), 1, 1,
1,2,2-Pentafluoroethane (HFC-125)
And 1,1,1,2-tetrafluoroethane (HFC
-134a) is disclosed in combination with a fluorine-based refrigerant.

Since there is no change in the composition of the single component or azeotropic refrigerants that have been used up to now, there is a need for a technique for suppressing the composition change particularly in the gas phase filling or the liquid phase filling at the time of filling. There wasn't.

Fluorine-based refrigerants are mixed in a certain specific weight ratio to substitute CFCs and HCFCs in cooling devices such as refrigerating machines and air conditioners that are currently widely used, and to exhibit equivalent refrigerant action. It is a thing. Therefore, when filling the cooling device with these fluorine-based refrigerants, care must be taken so that the composition is accurately maintained and the component composition does not differ depending on the filling operation.

In the case of filling with a fluorine-based refrigerant, a filling method similar to that for a single component can be considered. However, at that time, a component having a low boiling point selectively evaporates to the gas phase side, so that the composition change in both the gas and liquid phases. It cannot be avoided. For this reason, as the cooling device is filled with the cooling medium, the cooling medium composition of each cooling device changes, and it becomes difficult for all the cooling devices to exhibit the same capacity. Liquid phase filling is exemplified as a method of suppressing the composition change of the fluorine-based refrigerant. However, it cannot be applied to a device having only a filling port in a gas phase state.

By the way, as a conventional refrigerant charging device for a cooling device, for example, in Japanese Patent Laid-Open No. 56-105274,
When the refrigerant is filled into the cooling device from the container filled with the refrigerant, the filling circuit is repeatedly evacuated, and in the middle of the refrigerant flow path from the refrigerant container to the cooling device, an expansion valve and heat exchange for vaporizing the refrigerant. There is disclosed a device that is provided with a container and once the refrigerant is vaporized and then filled. In addition, the amount of refrigerant to be filled is determined by measuring the physical property value of the refrigerant in the pipeline on the inlet side of the expansion valve, calculating and setting the optimum filling time based on this, and after a predetermined time has elapsed, the valve on the refrigerant pipe side is set. There is disclosed a device for automatically setting by closing.

Further, in Japanese Patent Laid-Open No. 55-99566, a cylinder for filling a refrigerant is used, the cylinder is first evacuated by a vacuum pump, and then the refrigerant is moved from a refrigerant container containing the refrigerant to the cylinder. An apparatus for filling a cooling device with a precisely measured amount of a refrigerant in a liquid state is disclosed.

[0009]

However, the former refrigerant charging device has a drawback that the charging amount of the mixed refrigerant into the cooling device cannot be accurately grasped. Further, the latter refrigerant charging device has a drawback that the cooling device cannot be charged in the vapor phase.

The first object of the present invention is to solve the above problems.
It is an object of the present invention to provide a method and an apparatus for suppressing a composition change when a fluorine-based refrigerant, particularly a refrigerant in a vapor phase state, is filled into various devices. A second object of the present invention is to provide a fluorine-based refrigerant charging method and a device thereof in which the amount of refrigerant charged into a cooling device is accurate.

HFC-32 / HFC-125 / HFC-1 which is considered as an alternative candidate for chlorodifluoromethane
When non-azeotropic mixed refrigerant of 34a = 23/25/52 (wt%) is filled directly into various devices from a gas phase in a closed container,
At the initial stage of filling, HFC-32 having the lowest boiling point is selectively vaporized, so that the gas phase concentration of HFC-32 rises to around 33%, and as the filling is carried out, this HFC-32 concentration decreases and the sealing is performed. When the porosity of the container reaches 80% or more, the HFC-32 concentration decreases to around 18%. That is, H
FC-32 concentration is ± 10 against 23% concentration in a closed container.
% Or more, and it becomes impossible to control the refrigeration performance of the air conditioner.

[0012]

Means for Solving the Problems As a result of studies on a method for suppressing the composition change of a fluorine-based refrigerant when filling various devices in a gas state, the present inventors have once filled a container filled with the fluorine-based refrigerant. It has been found that such an object can be achieved by measuring the required filling amount from the liquid phase part in a measuring container and then filling the entire amount in a gas state, or by filling the vaporizer from the liquid phase part of the measuring container. It was That is, the present invention is the following inventions (1) to (4).

(1) Connection means (A-1) to the liquid phase portion of the closed container filled with a fluorine-based refrigerant, and pipe line opening / closing means (B)
-1), a measuring container connected to the connecting means (A-1), and a cooling device filling port connected to the outflow passage of the gas phase part of the measuring container via the conduit opening / closing means (B-2). And a connecting means (A-2) to the fluorine-based refrigerant charging device.

(2) Connection means (A-1) to the liquid phase portion of the closed container filled with the fluorine-based refrigerant, and pipeline opening / closing means (B)
-1), a measuring container connected to the connecting means (A-1), and a vaporizer connected to the outflow passage of the liquid phase portion of the measuring container via the pipe opening / closing means (B-3), Pipe opening / closing means (B
-2), and a connecting means (A-2) to a cooling device charging port connected to the outflow passage of the vaporizer.

(3) The fluorine-based refrigerant filled in the closed container is extracted from the liquid phase portion of the fluorine-based refrigerant in the closed container, introduced into a measuring container, and then a predetermined amount of the fluorine-based refrigerant is discharged from the measuring container. Is taken out and introduced into the cooling device in a gaseous state.

(4) The fluorine-based refrigerant filled in the closed container is extracted from the liquid phase portion of the fluorine-based refrigerant in the closed container, introduced into the measuring container, and then the liquid of the fluorine-based refrigerant in the measuring container. A method for charging a fluorine-based refrigerant, which comprises extracting a predetermined amount of a fluorine-based refrigerant from a phase portion, introducing it into a vaporizer, and then extracting a gaseous fluorine-based refrigerant from this vaporizer and introducing it into a cooling device.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION The fluorine-based refrigerant filling device of the present invention comprises a connecting means (A-1) to a liquid phase portion of a closed container filled with a fluorine-based refrigerant and a pipeline opening / closing means (B-1). A measuring container connected to the connecting means (A-1) via the connecting means, and a connecting means to the cooling device filling port connected to the outflow passage of the gas phase part of the measuring container via the pipe opening / closing means (B-2). And (A-2).

The fluorine-based refrigerant filled in the closed container is extracted from the liquid phase portion of the fluorine-based refrigerant in the closed container and then introduced into the measuring container, and then a predetermined amount of the fluorine-based refrigerant is discharged from the measuring container. It is extracted and introduced into the cooling device in a gaseous state. It is preferable to fill the cooling device in a gas state with the entire amount or a similar amount of the fluorine-based refrigerant measured by the measuring container. Thereby, especially when the fluorine-based refrigerant is a non-azeotropic mixed refrigerant, the mixed refrigerant can be filled without changing the composition.

A vaporizer may be provided between the outflow passage of the liquid phase portion of the measuring container and the connecting means (A-2) to the cooling device filling port. This vaporizer is connected to the outflow passage of the vapor phase portion of the measuring container via the pipe opening / closing means (B-3), and the outflow passage of the vaporizer is cooled via the pipe opening / closing means (B-2). It is connected to the connecting means (A-2) to the filling port.

When the vaporizer is used, the fluorine-based refrigerant in the measuring container is withdrawn from the liquid phase portion in a predetermined amount and then introduced into the vaporizer, and then the gaseous fluorine-based refrigerant is withdrawn from the vaporizer. It is taken out and introduced into the cooling device. The predetermined amount of the fluorine-based refrigerant extracted from the liquid phase portion in the measuring container may be the whole amount or a part of the fluorine-based refrigerant measured in the measuring container. Since it is introduced into the vaporizer in a liquid state from the measuring container, particularly when the fluorine-based refrigerant is a non-azeotropic mixed refrigerant, even if not the total amount, the composition of the mixed refrigerant can be filled with little or no change. By providing a pressure equalizing means described later, this composition change can be further reduced.

The connecting means (A-1) to the liquid phase portion of the closed container filled with the fluorinated refrigerant and the pipeline opening / closing means (B-1) for connecting the measuring container may be provided with a vacuum source capable of being communicated. desirable.

In the above, the measuring container is provided with a communicating pipe for displaying the liquid level of the filled liquid refrigerant in the container, a pressure gauge for displaying the pressure in the measuring container, and a display provided along the communicating pipe. It is preferable to provide a scale showing the weight of the mixed refrigerant of the liquid level in the communicating pipe under pressure.

As the heating means of the vaporizer, depending on the use environment of the device of the present invention, there may be a case where only a blower is sufficient, or a blower and an air heater (for example, an electric heater provided in the blower area of this blower). ) May be combined with. Further, a sheath heater or the like may be wound around the heat transfer pipe forming the vaporizer.

The purpose of these heating means is to completely evaporate and vaporize all of their component compounds in the vaporizer, regardless of the environmental conditions surrounding the filling device,
It is to fill the cooling device without changing the composition of the refrigerant components.

A dew condensation detector or a temperature detector is attached to the vaporizer, and it is preferable to provide a vaporizer heating means which operates by a detection signal for detecting either the dew condensation state or the temperature by the detector.

The dew condensation detector detects moisture (or frost) on the surface of the carburetor, and the temperature detector measures the surface temperature of the carburetor to vaporize the refrigerant while a part of the refrigerant remains in a liquid state. The state sent out from is detected and the vaporizer heating means is activated. A preferable example of the vaporizer is a heat conductive metal pipe with a heat transfer fin.

The above-mentioned measuring container is provided with a pressure equalizing means which communicates with the upper part of the measuring container and expands or reduces the volume of the gas in the measuring container which should accommodate the gas in accordance with the pressure of the upper part of the measuring container. preferable. When the fluorine-based refrigerant is a non-azeotropic mixed refrigerant, the pressure equalizing means can keep the volume of the non-azeotropic mixed refrigerant vapor phase portion in the measuring container constant.

As a result, the non-azeotropic mixed refrigerant is introduced into the measuring container, and the non-azeotropic mixed refrigerant extracted from the non-azeotropic mixed refrigerant in the measuring container is discharged from the liquid phase. The composition change can be suppressed. Examples of the pressure equalizing means include a bellows-type container or a pressure container with a built-in bellows, which communicates with the upper part of the measuring container.

It is preferable to provide a sight glass in the conduit extending from the measuring container to the cooling device connection port, so that it is possible to visually confirm whether or not the liquid refrigerant is mixed. The measuring method using the measuring container may be a method using a scale provided in the measuring container or a method using weight measurement using a balance.

The fluorine-based refrigerant charging device of the present invention is not limited to fluorine-based refrigerants, but can be used for single refrigerants, azeotropic mixed refrigerants, azeotrope-like mixed refrigerants, and the like. It can also be applied when filling in the liquid phase.

As the fluorine-based refrigerant, the above-mentioned HFC-32 /
HFC-125 / HFC-134a = 23/25/52
(Wt%) non-azeotropic mixed refrigerant, or HFC-32
/ HFC-125 = 50/50 (wt%) mixed refrigerant,
HFC-32 / HFC-125 = 45/55 (wt%)
Mixed refrigerant, HFC-125 / HFC-143a = 50
/ 50 (wt%) mixed refrigerant, HFC-125 / HFC
-134a / HFC-143a = 44/4/52 (wt
%) And other azeotropic or azeotrope-like mixed refrigerants.

[0032]

FIG. 1 is a conceptual diagram showing an embodiment of the present invention. The fluorine-based refrigerant filling device 1 includes a connecting means 2 that connects to a refrigerant outlet 71 of a fluorine-based refrigerant container 70 that stores a fluorine-based refrigerant. The connecting means 2 is an opening / closing valve V.
1, V2, V3, V4 are communicated with the lower end of the inside of the measuring container 3 by a liquid refrigerant flow path sequentially and sequentially in this order. When the refrigerant container 70 is small, the connecting means 2 is configured to connect with the refrigerant outlet 71 facing downward, and when the refrigerant container 70 is large, it is opened in the liquid phase portion of the refrigerant container 70. It is connected to an outlet provided in a refrigerant outlet pipe (not shown) provided with a section.

The measuring container 3 is composed of an upright cylindrical hermetic pressure-resistant container, and a refrigerant inlet 3a and a refrigerant outlet 3b which are capable of communicating with the connecting means 2 are provided at the bottom thereof. Further, on the ceiling of the measuring container 3, a pressure gauge PG3 for displaying the pressure inside the measuring container 3, a purge for opening the inside of the measuring container 3 to the outside via an opening / closing valve V9 and a flow meter FG for measuring and displaying the purge flow rate. A release valve 3d is provided which is activated when the pressure in the pipe 3c and the measuring container 3 becomes a predetermined value or more. Further, the measuring container 3 is provided with a level gauge 3e made of a transparent communication pipe that communicates between the upper end portion and the lower end portion thereof.

The carburetor 4 is connected to the refrigerant outlet 3b through an on-off valve V5. The carburetor 4 is composed of a metal pipe 4a provided with a large number of heat transfer fins 4b on its surface and arranged in a meandering manner with a predetermined width. Facing the carburetor 4, carburetor heating means including a blower fan 5 and an air heater 6 composed of an electric heater is provided. A dew condensation detector 7 including a moisture sensor is additionally provided on the downstream side of the metal pipe 4a. Based on the moisture detection signal from the dew condensation detector 7, the controller 15 transmits an operation signal, so that the vaporizer heating means operates.

In the above, a temperature detector is provided in place of the dew condensation detector 7, and the vaporizer heating means is activated when a temperature equal to or lower than a predetermined temperature determined according to a physical property value such as a boiling point of the mixed refrigerant is detected. May be. These dew condensation detectors and temperature detectors activate the heating means by both signals or by either signal. The vaporizer heating means may be an electric heating wire wound around the metal pipe 4a.

A sight glass 8 is provided in the refrigerant flow path from the vaporizer 4 to the connecting means 10 to the filling port 51 of the cooling device 50. Is a liquid refrigerant mixed in the refrigerant discharged from the vaporizer 4? You can directly see whether or not.

A vacuum pump 9 is connected to the liquid refrigerant flow path from the connecting means 2 to the refrigerant inlet 3a via an on-off valve V6. Further, this liquid refrigerant flow path and the vaporizer 4 are connected to the connecting means 10. The gas refrigerant flow path that reaches the connecting means 10 can be communicated with the connecting means 10 via a short-circuit flow path that short-circuits via the on-off valve V7. The fluorine-based refrigerant charging device 1 is a unit in which the vacuum pump 9, the measuring container 3, the vaporizer 4, the vaporizer heating means 5 and 6, the controller 15 and the like are connected by a refrigerant pipe to form a unit. It will be attached to.

In the fluorine-based refrigerant charging device having the above structure, the refrigerant container 70 is connected to the connecting means 2 and the connecting means 1 is connected to the charging port 51 of the cooling device 50 to be charged with the refrigerant.
By connecting 0, the opening / closing valves V8, V6, and V7 are opened, and the vacuum pump 9 is operated with all the other valves kept closed. It is confirmed by the pressure gauge PG2 that the inside of the refrigeration circuit of the cooling device 50 and the inside of the vaporizer 4 have become vacuum, and the valve V8,
Close V7 and V6.

Next, the on-off valves V1, V2, V3 and V4 are opened to fill the measuring container 3 with the liquid refrigerant. If necessary, the on-off valve V9 is operated to open the purge pipe 3c for a short period of time to make a slight differential pressure in the upper portion inside the measuring container with respect to the inflow pressure of the liquid refrigerant, thereby making the level gauge 3e and While looking at the flow meter FG, the required amount of refrigerant is transferred to the measuring container 3.

In the measuring container 3, the pressure of the fluorine-based refrigerant filled in the refrigerant container 70 is plotted on the horizontal axis, and the vertical axis shows the weight of the mixed liquid refrigerant up to the display liquid level of the level gauge 3e at the pressure. Slide scale 3f (see Figure 2)
Are rotatably provided along the peripheral surface of the weighing container 3. By looking at the display pressure of the pressure gauge PG3, the weight of the liquid refrigerant in the measuring container 3 is known by matching the pressure line of the slide scale 3f with the level gauge 3e.

Next, the on-off valves V1, V2, V3 and V4 are closed, the on-off valves V5 and V8 are opened, and the liquid refrigerant in the measuring container 3 is accurately moved by the slide scale 3f by a predetermined amount.
After flowing out to the vaporizer 4, the valve V5 is closed. The liquid refrigerant that has flowed into the vaporizer 4 is evaporated and vaporized, and quickly flows into the operating cooling device 50 through the charging port 51 and is charged therein.
The vaporizer heating means 5, 6 blows warm air at a temperature equal to or higher than a temperature at which the highest boiling point refrigerant component in the mixed refrigerant components can be evaporated so that the liquid refrigerant does not remain in the vaporizer 4. The cooling device 50 can be accurately filled with a predetermined amount.

When moving the liquid refrigerant from the refrigerant container 70 into the measuring container 3, if necessary, the purge pipe 3c is manually opened to slightly lower the pressure in the upper part of the measuring container 3,
Introduced a liquid refrigerant, which is
This causes fluctuations in pressure, which in turn causes changes in the composition of the fluorine-based refrigerant. As one means to improve this point,
As shown in FIG. 2, it is preferable to equip the purge pipe 3c with a pressure equalizing means 20.

In FIG. 2, the pressure equalizing means 20 is provided with a metal bellows 25 inside a sealed cylindrical pressure-resistant container 21, and an upper end edge 26 of the bellows 25 that opens is located at a peripheral portion of a ceiling portion 22 of the container 21. It has a structure in which the inner space of the container 21 is divided into two by being fixed to, and the purge pipe 3c penetrates the bottom portion 23 of the container 21 and is opened inside the container 21.
Further, a release valve 24 is provided which operates when the pressure in the space surrounded by the bellows 25 exceeds the allowable pressure.

When the valve V4 is opened and the liquid refrigerant is introduced into the measuring container 3, the pressure equalizing means 20 responds to the pressure of the liquid refrigerant.
The bellows 25 moves upward little by little while resisting the pressure of the refrigerant, and can introduce the liquid refrigerant while keeping the pressure in the measuring container 3 constant. When the liquid refrigerant moves to the vaporizer side, conversely, the liquid refrigerant is pressurized by the restoring extension force of the bellows and transferred to the vaporizer side under a substantially constant pressure. Therefore, the composition of the refrigerant remaining in the refrigerant container 70 is not changed, and similarly, the change of the composition of the liquid refrigerant delivered from the measuring container 3 is suppressed.

As the pressure equalizing means, a telescopic container made of bellows may be connected to the upper part inside the measuring container 3, and a piston sliding in the cylindrical pressure resistant container 21 is supported by spring pressure from one side, Measure the air on the other side of the piston 3
It may be connected to the inside. In the above embodiment,
The on-off valves V1 to V9 may be electromagnetic valves, and a detection means for confirming the end of each operation stage of the refrigerant filling operation may be provided to automatically control the opening / closing operation according to the signal.

[0046]

EFFECTS OF THE INVENTION According to the present invention, when the fluorine-based refrigerant is charged in the gas phase, the composition change can be adjusted within the control range, and the refrigerant manufacturer can fill the cylinder and the air conditioner manufacturer can fill the air conditioner with the refrigerant. It can be used in all fields, such as repair, filling of service cans in case of leakage, etc. Furthermore, the required amount can be filled accurately, and since the filling is performed in a completely vaporized state, the filling can be performed quickly while the cooling device is operating. Therefore, there is an advantage that the adjustment of the cooling device can be completed in a short time.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a main part of another embodiment of the present invention.

[Explanation of symbols]

 1: Fluorine-based refrigerant filling device 2: Refrigerant container connection means 3: Measuring container 3a: Refrigerant inlet 3b: Refrigerant outlet 3c: Purge pipe 3d: Release valve 3e: Level gauge 3f: Slide scale 4: Vaporizer 4a: Metal Pipe 4b: Heat transfer fin 5: Blower fan 6: Air heater 7: Condensation detector 8: Sight glass 9: Vacuum pump 10: Connecting means to filling port 15: Controller 20: Pressure equalizing means 21: Cylindrical pressure resistance Container 22: Cylindrical pressure-resistant container ceiling 23: Cylindrical pressure-resistant container bottom 24: Release valve 25: Metal bellows 26: Upper edge 50: Cooling device 51: Filling port 70: Mixed refrigerant container V1 to V9: Open / close valve PG1 to PG3 : Pressure gauge FG: Flow meter

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Masato Fukushima, 10 Goi Kaigan, Ichihara City, Chiba, Asahi Glass Co., Ltd. Chiba Plant (72) Akihiko Yamashita 38, Hachiman Kaigan Dori, Ichihara, Chiba Asahi Glass Engineering Co., Ltd. ( 72) Inventor Kai Tsuboi No. 246, Kozaka, Suzaka, Nagano Prefecture Orion Machinery Co., Ltd. (72) Hideo Tamai, No. 246, Kozaka, Susaka City, Nagano Prefecture

Claims (8)

[Claims] 1. A connecting means (A-1) for connecting a liquid phase portion of a closed container filled with a fluorinated refrigerant, and a conduit opening / closing means (B-1).
Connecting to the connecting means (A-1) via the connecting means, and connecting to the cooling device filling port connecting to the outflow passage of the gas phase portion of the measuring container via the pipe opening / closing means (B-2). Means (A-
2) A fluorine-based refrigerant charging device comprising: 2. A means (A-1) for connecting to a liquid phase portion of a closed container filled with a fluorinated refrigerant, and a conduit opening / closing means (B-1).
A measuring container connected to the connecting means (A-1) via a pipe, a vaporizer connected to the outflow passage of the liquid phase portion of the measuring container via a pipe opening / closing means (B-3), and a pipe opening / closing Means (B-2)
And a connecting means (A-2) to a cooling device charging port which is connected to the outflow passage of the vaporizer via the fluorinated refrigerant charging device. 3. The fluorine-based refrigerant charging device according to claim 2, further comprising a condensation detector or a temperature detector attached to the vaporizer, the vaporizer heating means being activated by a detection signal for detecting the condensation state or temperature by the detector. 4. The carburetor comprises a heat-conductive metal pipe with heat transfer fins, and the carburetor heating means comprises (1) a combination of a blower and an air heater provided in a blower area of the blower,
(2) The fluorine-based refrigerant charging device according to claim 2 or 3, which is configured by an electric heater attached to the metal pipe or (3) a blower. 5. The measuring container is provided with a pressure equalizing means that communicates with an upper portion of the measuring container and that expands or contracts a volume of the measuring container for accommodating a gas in accordance with the internal pressure of the measuring container.
2, 3 or 4 fluorine-based refrigerant charging device. 6. The fluorine-based refrigerant charging device according to claim 5, wherein the pressure equalizing means is a bellows type container or a pressure container with a built-in bellows. 7. After extracting the fluorine-based refrigerant filled in the closed container from the liquid phase part of the fluorine-based refrigerant in the closed container,
A method for charging a fluorine-based refrigerant, which comprises introducing the fluorine-based refrigerant into a measuring container, extracting a predetermined amount of the fluorine-based refrigerant from the measuring container, and introducing the fluorine-based refrigerant in a gaseous state into a cooling device. 8. A fluorine-based refrigerant filled in a closed container is extracted from a liquid phase portion of the fluorine-based refrigerant in the closed container,
After introducing into the measuring container, and then withdrawing a predetermined amount of the fluorine-based refrigerant from the liquid phase portion of the fluorine-based refrigerant in the measuring container,
A method for charging a fluorine-based refrigerant, which comprises introducing the gas into the vaporizer, then extracting the gaseous fluorine-based refrigerant from the vaporizer and introducing the refrigerant into a cooling device.