JPH0624666Y2 - Flow control device for gas appliances for micro combustion - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a flow rate control device for a gas appliance for micro combustion such as a gas refrigerator, and in particular, it provides an apparatus for facilitating the formation of a small diameter orifice.

[Background of the invention]

 There is a gas refrigerator, for example, as a gas appliance for micro combustion.

As shown in FIG. 4, the fuel gas 53 supplied from the fuel supply source 51 through the fuel supply pipe 52 is injected from the burner 54 and burned, and the combustion heat causes the refrigerant in the refrigerant gas generator 55 to flow. The solution 56 is heated to generate a refrigerant vapor 57, which is radiated by a condenser 58 to be condensed into a liquid refrigerant 59, and the liquid refrigerant 59 is evaporated by an evaporator 60, and heat absorption at the time of this evaporation. The effect is to cool the interior space 61 to refrigerate the food or the like in the interior space 61.

In this way, the fuel gas 53 to be injected from the burner 54
The amount of combustion heat is only a small amount that heats the refrigerant solution 56 to generate the refrigerant vapor 57, and the excessive combustion heat only causes supercooling of the internal space 61, which is uneconomical.

Therefore, it is necessary to limit the injection amount of the fuel gas 53 from the burner 54 to a very small amount.

[Conventional technology]

Conventionally, as a technique for limiting the injection amount of the fuel gas 53 from the burner 54 to a very small amount, a pressure regulator such as a regulator can be incorporated in the fuel supply pipe 52.

However, regulators and the like are large in size, occupy a large space, and a gas appliance incorporating the regulator is large in size. is doing.

On the other hand, in a flow rate control device having a minute bore orifice, the fuel gas 53 is jetted from the minute bore orifice 62 only in minute amounts, the flow rate of the fuel gas 53 in the fuel supply pipe 52 is restricted, and the fuel from the burner 54 is controlled. The injection amount of the gas 53 is configured to be very small.

[Problems of solution]

In this flow rate control device, in order to form a minute bore orifice, machining by a drill is generally performed, and in this case, it is necessary to use a very fine drill corresponding to the diameter of the minute bore orifice.

However, in this conventional flow rate adjusting device, since the portion forming the minute diameter orifice is made of a metal material, it is hard, the resistance applied to the drill during drilling processing is large, and an ultrafine drill with low mechanical strength is easily damaged. Etc., the processing is difficult, and the cost is high due to the difficulty of processing.

It should be noted that it is possible to use an electron beam or a laser beam to form a small-diameter orifice instead of drilling. In this case, however, the cost of equipment such as an electron beam generator and a laser beam generator is extremely high. It is costly and not feasible for financial reasons.

The present invention has been made in view of the above conventional problems, and provides a flow rate control device for a small amount combustion gas appliance which occupies a small space, allows a gas appliance incorporating the same to be compact, and can be manufactured at low cost. To aim.

[Means for Solving the Problems]

The present invention is, for example, as shown in FIG. 3, a flow control device 34 for a small amount combustion gas appliance which is provided in the middle of a fuel supply pipe provided with a burner at its tip, or a plurality of gas combustion devices connected in series. An opening 27 is provided at the tip of the tubular body 25, and the opening 27 is covered with a heat-resistant synthetic resin film 29 having a minute diameter orifice 28, and the synthetic resin film 29 is fixed to the opening 27.

[Action]

The fuel gas 10 is ejected little by little from the small-diameter orifice 28, and the burner 12 is passed through the subsequent fuel supply pipe 11.
A small amount is injected from the burner 12 and a small amount is burned in the burner 12.

In addition, the small-diameter orifice 28 is a synthetic resin film 29.
Since the synthetic resin film 29 is softer than a metal material, the resistance at the time of drilling is small, and even an extremely fine drill is unlikely to be damaged.

[Embodiment] An embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is an overall perspective view of a portable gas refrigerator according to an embodiment of the present invention, FIG. 2 is a mechanism explanatory view of the refrigerator, and FIG. 3 is a vertical sectional view of a flow rate adjusting device used in the refrigerator.

First, the configuration of the portable gas refrigerator 1 will be described.

As shown in FIG. 1, in the portable gas refrigerator 1, an internal space 2, a device room 3, and a cylinder housing room 4 are arranged.

A lid 6 is attached to the upper opening 5 of the interior space 2.

Further, an absorption refrigerating device 7 is arranged in the equipment chamber 3, and a connecting tool 9 for connecting a gas cylinder 8 is arranged in the cylinder housing chamber 4.

A fuel supply pipe 11 serving as a supply path of the fuel gas 10 is led out from the connector 9, and a burner 12 for burning the fuel gas 10 supplied from the fuel supply pipe 11 is attached to the tip of the fuel supply pipe 11. .

In addition, as shown in FIG. 2, the absorption refrigeration system 7 includes a refrigerant vapor generator 15 that heats the refrigerant solution 13 with the combustion heat of the fuel gas 10 that is burned by the burner 12 to generate a high-temperature refrigerant vapor 14. , A condenser 17 for radiating the high-temperature refrigerant vapor 14 received from the refrigerant vapor generator 15 to condense it into a liquid refrigerant 16, and an endothermic action at the time of evaporating the liquid refrigerant 16 received from the condenser 17 An evaporator 18 for cooling the space 2 is combined with a refrigerant gas 19 generated by evaporation in the evaporator 18 and a diluted refrigerant solution 20 sent from the refrigerant vapor generator 15 to form a diluted refrigerant solution 20. An absorber 21 that absorbs the refrigerant gas 19 and restores the refrigerant solution 13 and a refrigerant solution tank 22 that stores the refrigerant solution 13 restored by the absorber 21,
The restored refrigerant solution 13 can be returned from the refrigerant solution tank 22 to the refrigerant vapor generator 15.

In addition to the burner 12, a direct current electric heater 23 and an alternating current electric heater 24 are opposed to the refrigerant vapor generator 15.

That is, in the vehicle, the direct-current electric heater 23 can be made to generate heat by electricity taken in from the battery via the cigarette lighter, and indoors, the alternating-current electric heater 24 can be made to make heat by electricity taken in from a household power source via an outlet. The heat source of the refrigerant vapor generator 15 can be selectively used according to the location.

A flow rate adjusting device 34 is provided in the middle of the fuel supply pipe 11.

As shown in FIG. 3, an external thread portion 26 is formed on the outer peripheral side surface of the tip of a cylindrical body 25, and an opening 27 is formed at the tip.

The opening 27 is covered with a synthetic resin film 29 having a small diameter orifice 28.

The synthetic resin film 29 is installed so that the small-diameter orifice 28 is arranged at the center of the opening 27.

Further, the diameter of the small diameter orifice 28 may be set so that a supply amount of the fuel gas 10 suitable for the operation of the portable gas refrigerator 1 using the burner 12 can be secured, and for example, the diameters are 0.05 mm and 0.1 mm. You can set it to about.

Further, a cap nut 30 is attached to the tip of the tubular body 25,
A female screw portion 31 that is screwed into the male screw portion 26 is formed on the inner peripheral side surface of the cap nut 30, and a peripheral portion 32 of the synthetic resin film 29 is sandwiched between the female screw portion 31 and the male screw portion 26. The synthetic resin film 29 is fixed to the opening 27 of the tubular body 25, and the synthetic resin film 29 can be replaced by attaching and detaching the cap nut 30.

A threaded portion 33 may be provided on each of the cap nut 30 and the tubular body 25, and the threaded portion 33 may be screwed to and attached to the fuel supply pipe 11.

Although only one flow rate adjusting device 34 may be used as illustrated, a plurality of flow rate adjusting devices 34 may be connected in series and used.

〔effect〕

According to the present invention, the fine aperture can be formed by using an ultra-fine drill in the synthetic resin film, and compared with the conventional technique in which the fine aperture is formed by the ultra-fine drill at the tip of a metal object. The resistance at the time becomes remarkably small, the risk of breakage of an ultra-fine drill having a small mechanical strength can be reduced, the processing becomes easy, and the flow control device can be manufactured at low cost due to the ease of processing.

Further, a pressure regulator such as a regulator, which has been conventionally installed, is not required, and the cost and size of the gas appliance can be reduced.

[Brief description of drawings]

FIG. 1 is an overall perspective view of a portable gas refrigerator according to an embodiment of the present invention, FIG. 2 is a mechanism explanatory view of the refrigerator, FIG. 3 is a vertical sectional view of a flow rate adjusting device used in the refrigerator, and FIG. Is a background explanatory diagram. 10 ... Fuel gas, 12 ... Burner, 25 ... Cylinder,
27 ... Aperture, 28 ... Small-diameter orifice, 292
9 ... Synthetic resin film, 34 ... Flow control device.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Aji Tsuchiya 2-7-1, Hatchobori, Chuo-ku, Tokyo Iwatani Sangyo Co., Ltd. Tokyo Head Office (72) Hiroshi Kawabata 2-7-1, Hatchobori, Chuo-ku, Tokyo Iwatani Corporation Tokyo Head Office

Claims (1)

[Scope of utility model registration request] 1. A flow control device 34 for a gas appliance for small-quantity combustion, comprising one or a plurality of serially connected fuel supply pipes 11 having a burner 12 at the tip thereof, which is a cylindrical body 2.
5 An opening 27 is provided at the tip, and the opening 27 is covered with a synthetic resin film 29 having a small diameter orifice 28.
This synthetic resin film 29 is fixed to the opening 27, and a flow rate adjusting device for a gas appliance for micro combustion is characterized.