JP2006207925A - Carbon dioxide gas filling device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a carbon dioxide gas filling device capable of accurately filling the predetermined amount of carbon dioxide gas even though the carbon dioxide gas has properties instable in its phase and largely changes its density by the change of temperature. <P>SOLUTION: This carbon dioxide gas filling device is composed of a carbon dioxide gas cylinder 3, a carbon dioxide gas supply passage 6 charged with a filling valve 7 at a filling nozzle side, to supply the carbon dioxide gas from the carbon dioxide gas cylinder 3 by the charging nozzle 5, and a mass flowmeter 8 intervened on the carbon dioxide gas supply passage 6 for measuring the filling quantity of carbon dioxide gas to an object filled by the charging nozzle 5 of the carbon dioxide gas supply passage 6. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a carbon dioxide gas filling device that fills carbon dioxide gas used as a refrigerant.

  Conventionally, when a chlorofluorocarbon refrigerant is charged into a refrigerator or the like, a liquefied refrigerant is accumulated in a cylinder, and the refrigerant accumulated in the cylinder is pressurized and injected by a piston.

Such a filling method can be used with a fluorocarbon refrigerant whose density is relatively stable with respect to temperature. However, due to temperature changes such as carbon dioxide, the phase state is unstable and the density change is large. With physical properties, it is difficult to control the filling amount.
In addition, when carbon dioxide gas is continuously charged, it is difficult to manage the temperature of the cylinder, and a cooling process of the cylinder is inevitably generated after the end of one cycle, and it is difficult to control the filling amount. There was a drawback that the gas in the carbon dioxide container could not be used sufficiently.
nothing special

  In view of the above-mentioned conventional drawbacks, the present invention is a carbon dioxide gas capable of accurately filling a predetermined amount even with carbon dioxide gas having physical properties that are unstable in phase state and large in density change due to a change in temperature. The object is to provide a filling device.

The above and other objects and novel features of the present invention will become more fully apparent when the following description is read in conjunction with the accompanying drawings.
However, the drawings are for explanation only and do not limit the technical scope of the present invention.

  In order to achieve the above object, the present invention provides a carbon dioxide gas container, a carbon dioxide gas supply path for supplying a carbon dioxide gas from the carbon dioxide gas container to a filling nozzle, which is provided with a filling valve on the filling nozzle side, A carbon dioxide filling device is constituted by a mass flow meter interposed in the carbon dioxide supply passage for measuring the amount of carbon dioxide filled in the carbon dioxide supply passage filled with the filling nozzle.

  The present invention also provides a liquefied carbon dioxide gas container, a liquefied carbon dioxide gas supply path for supplying a liquefied carbon dioxide gas from the liquefied carbon dioxide gas container to a filling nozzle filled with a filling valve on the filling nozzle side, Measure the filling amount of carbon dioxide gas into the one filled with the filling nozzle, interposed in the liquefied carbon dioxide gas supply passage downstream of the pressure pump, and the pressure pump interposed in the carbon dioxide gas supply passage The liquefied carbon dioxide filling device is composed of the mass flow meter to be used.

  As will be apparent from the following description, the present invention has the following effects.

(1) A carbon dioxide gas container, a carbon dioxide gas supply passage for supplying a carbon dioxide gas from the carbon dioxide gas container to a filling nozzle, and a filling valve provided on the filling nozzle side, and a filling nozzle for the carbon dioxide gas supply passage And the mass flow meter interposed in the carbon dioxide supply path for measuring the amount of carbon dioxide filled in the one filled with the carbon dioxide gas flowing when filling the carbon dioxide supply path. Therefore, it is possible to accurately measure the filling amount of carbon dioxide gas to be filled.
Therefore, the filling amount of carbon dioxide gas into the filling can be made uniform, and the quality can be improved.

(2) According to the above (1), even if it is continuously filled, a cooling step is not required as in the prior art, and one cycle is short and filling can be performed efficiently.

(3) According to the above (1), the structure is simple and can be easily manufactured.

(4) Claim 2 can obtain the same effects as the above (1) to (3), and can efficiently prevent the entry of substances other than carbon dioxide when filling with carbon dioxide.

(5) In claim 3, the same effects as in the above (1) to (3) can be obtained, and the pressure pump can always be filled at a constant pressure flow rate, and an accurate amount of liquefied carbon dioxide gas is filled. be able to.

(6) In claim 4, the same effects as in the above (1) to (3) and (5) can be obtained, and the liquefied carbon dioxide gas can be efficiently passed through the liquefied carbon dioxide gas supply path by a gas-liquid separator. More accurate liquefied carbon dioxide gas can be filled.

(7) In claim 5, the same effects as in the above (1) to (3), (5), and (6) can be obtained, and the liquefied carbon dioxide gas can be filled more accurately.

  Hereinafter, the present invention will be described in detail with reference to the best mode for carrying out the invention shown in the drawings.

  In the first preferred embodiment for carrying out the present invention shown in FIGS. 1 to 3, the present invention is capable of uniformly filling a predetermined amount into a refrigerator 2 using carbon dioxide as a refrigerant. The carbon dioxide gas filling device 1 has one end connected to a carbon dioxide gas container 3 in which a cylinder is filled with a gas or liquid carbon dioxide gas, and an on-off valve 4 of the carbon dioxide gas container 3. A carbon dioxide gas supply passage 6 in which a filling nozzle 5 for filling the refrigerator 2 with carbon dioxide gas is attached at the end, and a filling valve 7 interposed in a portion of the carbon dioxide gas supply passage 6 near the filling nozzle 5; It is less affected by changes in the temperature, pressure, and density of the carbon dioxide gas flowing through the carbon dioxide gas supply passage 6 upstream of the carbon dioxide gas supply passage 6 near the filling valve 7, and is highly accurate with low pressure loss. Coriolis that can measure the flow rate A mass flow meter 8, an on-off valve 9 interposed in the carbon dioxide gas supply path 6 upstream of the mass flow meter 8, and the carbon dioxide supply between the on-off valve 9 and the mass flow meter 8 The vacuum device 13 includes a vacuum pump 12 interposed in the passage 6 and a vacuum pipe 12 interposed in the suction pipe 10 for vacuuming the downstream of the on-off valve 9.

The carbon dioxide filling device 1 having the above configuration connects the filling nozzle 5 and a refrigerant supply path (not shown) of the refrigerator 2 in a sealed state.
Thereafter, the on-off valve 9 of the carbon dioxide gas supply path 6, the on-off valve 11 of the suction pipe 10 and the filling valve 7 are opened, and the vacuum pump 12 is actuated to operate the carbon dioxide gas supply path 6 and the refrigerant supply path of the refrigerator 2 (see FIG. Vacuum).

  Next, the opening / closing valve 11 of the suction pipe 10 is closed, the opening / closing valve 4 of the carbon dioxide container 3 is opened, and the filling valve 7 is closed when the preset filling amount is measured by the mass flow meter 8. Complete filling.

The opening and closing of the filling valve 7 is a control circuit that is controlled to automatically close when the filling amount preset by the mass flow meter 8 is reached, or a valve that opens and closes according to a command from the control circuit. .
In addition, the work of closing the on-off valve 9 of the carbon dioxide gas supply path 6 and evacuating the downstream of the on-off valve 9 is performed in the second and subsequent filling operations.
[Different forms for carrying out the invention]

  Next, different modes for carrying out the present invention shown in FIGS. 4 to 7 will be described. In the description of these different modes for carrying out the present invention, the same components as those in the best mode for carrying out the present invention are designated by the same reference numerals and redundant description is omitted. To do.

  In the second embodiment for carrying out the present invention shown in FIG. 4, the main difference from the first embodiment for carrying out the present invention is that a cylinder or storage tank capable of supplying liquefied carbon dioxide gas is used. A pressure pump 14 is provided in the liquefied carbon dioxide container 3A and the liquefied carbon dioxide supply path 6A upstream of the mass flow meter 8, a cooling device 15 is provided upstream of the pressure pump 14, and a safety valve 16 is provided downstream of the pressure pump 14. At the same time, the present invention is implemented even in the carbon dioxide gas filling device 1A constructed as described above in that the suction pipe 10 is interposed in the liquefied carbon dioxide gas supply path 6A between the filling valve 7 and the filling nozzle 5. In addition to the effects similar to those of the first preferred embodiment, the carbon dioxide gas can be more accurately filled.

  The third embodiment for carrying out the present invention shown in FIG. 5 is mainly different from the second embodiment for carrying out the present invention in that the liquefied carbon dioxide gas supply path 6A upstream of the cooling device 15 is in the air. Even with the carbon dioxide gas filling device 1B configured as described above, the same effect as that of the second embodiment for carrying out the present invention can be obtained and the liquefied carbon dioxide can be obtained by interposing the liquid separator 17. Only the liquefied carbon dioxide gas can flow through the gas supply path 6A, and the carbon dioxide gas can be filled more accurately.

  The fourth embodiment for carrying out the present invention shown in FIG. 6 is mainly different from the third embodiment for carrying out the present invention in that one end is between the mass flow meter 8 and the filling valve 7. In this way, an open / close valve 18 and a back pressure valve 19 connected to the gas side of the gas-liquid separator 17 are connected to the liquefied carbon dioxide gas supply path 6A. Even with the carbon dioxide gas filling device 1C configured as described above, the same effects as those of the third embodiment for carrying out the present invention can be obtained, and more accurate carbon dioxide gas filling can be performed.

  The fifth embodiment for carrying out the present invention shown in FIG. 7 is mainly different from the best first embodiment for carrying out the present invention in that the internal volume from the refrigerator 2 to the on-off valve 9 is different. If the capacity of the refrigerator 2 is small with respect to the internal volume of the refrigerator 2 and there is no problem, the carbon dioxide gas filling device 1D that does not use a vacuum device may be used.

  The present invention is used in the industry of manufacturing a carbon dioxide gas filling device for filling a predetermined amount of carbon dioxide gas.

BRIEF DESCRIPTION OF THE DRAWINGS The schematic explanatory drawing of the best 1st form for implementing this invention. The principal part top view of the best 1st form for implementing this invention. The principal part front view of the best 1st form for implementing this invention. Schematic explanatory drawing of the 2nd form for implementing this invention. Schematic explanatory drawing of the 3rd form for implementing this invention. Schematic explanatory drawing of the 4th form for implementing this invention. Schematic explanatory drawing of the 5th form for implementing this invention.

Explanation of symbols

1, 1A, 1B, 1C, 1D: Carbon dioxide filling device,
2: refrigerator, 3, 3A: carbon dioxide container,
4: Open / close valve, 5: Filling nozzle,
6, 6A: Carbon dioxide gas supply path, 7: Filling valve,
8: Mass flow meter, 9: On-off valve,
10: suction pipe, 11: on-off valve,
12: vacuum pump, 13: vacuum device,
14: pressurizing pump, 15: cooling device,
16: Safety valve, 17: Gas-liquid separator,
18: On-off valve, 19: Back pressure valve,
20: Circulation path.

Claims (6)

Filled with a carbon dioxide gas container, a carbon dioxide gas supply passage with a filling valve provided on the side of the filling nozzle, which is supplied to a filling nozzle filled with carbon dioxide gas from the carbon dioxide gas container, and a filling nozzle of the carbon dioxide gas supply passage. A carbon dioxide gas filling device comprising: a mass flow meter interposed in the carbon dioxide gas supply path for measuring a carbon dioxide gas filling amount into a thing. Filled with a carbon dioxide gas container, a carbon dioxide gas supply passage with a filling valve provided on the side of the filling nozzle, which is supplied to a filling nozzle filled with carbon dioxide gas from the carbon dioxide gas container, and a filling nozzle of the carbon dioxide gas supply passage. A mass flow meter interposed in the carbon dioxide gas supply path for measuring the amount of carbon dioxide filled in the object, an on-off valve interposed in the carbon dioxide gas supply path upstream of the mass flow meter, And a vacuum device provided with a vacuum pump interposed in the carbon dioxide gas supply path between the valve and the mass flow meter and provided with an open / close valve for evacuating the downstream of the open / close valve. Carbon dioxide filling device. A liquefied carbon dioxide container, a liquefied carbon dioxide supply path for supplying a liquefied carbon dioxide gas from the liquefied carbon dioxide gas container to a filling nozzle, and a filling valve on the filling nozzle side, and a liquefied carbon dioxide gas supply path A mass flow meter for measuring the amount of liquefied carbon dioxide filled in the filling nozzle filled in the liquefied carbon dioxide gas supply passage downstream of the pressure pump. And a carbon dioxide gas filling device. A liquefied carbon dioxide container, a liquefied carbon dioxide supply path for supplying a liquefied carbon dioxide gas from the liquefied carbon dioxide gas container to a nozzle filled with a filling valve on the filling nozzle side, and a liquefied carbon dioxide gas supply path A gas-liquid separator for supplying only the liquefied carbon dioxide gas, a pressure pump provided in the liquefied carbon dioxide gas supply path downstream of the gas-liquid separator, and the liquefied carbon dioxide downstream of the pressure pump. A carbon dioxide filling device, comprising: a mass flow meter that measures a filling amount of liquefied carbon dioxide gas that is filled in the gas supply passage and is filled with the filling nozzle. A liquefied carbon dioxide container, a liquefied carbon dioxide supply path for supplying a liquefied carbon dioxide gas from the liquefied carbon dioxide gas container to a nozzle filled with a filling valve on the filling nozzle side, and a liquefied carbon dioxide gas supply path A gas-liquid separator for supplying only the liquefied carbon dioxide gas, a pressure pump provided in the liquefied carbon dioxide gas supply path downstream of the gas-liquid separator, and the liquefied carbon dioxide downstream of the pressure pump. A mass flow meter for measuring the filling amount of liquefied carbon dioxide gas filled in the filling nozzle inserted in a gas supply path, and the liquefied carbon dioxide gas between the mass flow meter and the filling valve A carbon dioxide gas filling device comprising: a circulation path having a back pressure valve interposed at one end portion in the supply path and at the other end interposed in the gas side of the gas-liquid separator. A vacuum device is provided that includes a vacuum pump that is interposed in a liquefied carbon dioxide gas supply path between a filling valve and a filling nozzle and that has an open / close valve that evacuates the downstream of the filling valve. The carbon dioxide filling device according to any one of claims 2, 3, 4, and 5.

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