JPH0391659A - Refrigerator and refrigerant gas generator without power supply used for refrigerator - Google Patents

Abstract

PURPOSE:To provide a portable refrigerant gas generator in a place where there is no power source available by using a catalyst heater as a heat source for refrigerant solution heating of a refrigerant gas generator. CONSTITUTION:A refrigerant gas generator is in double structure. An inner cylinder is used as a refrigerant solution communication pipe 9 while an outer cylinder 10 covers the surrounding of the communication pipe 9 and thereby forms a ring space 11. The refrigerant solution communication pipe 9 is connected with a solution receiver in its inlet while its outlet is connected with a vaporizer, for example, with a separator inside a system. The peripheral surface of the refrigerant solution communication pipe 9 is surrounded with a catalyst heater 13 and installed inside the ringed space 11. The catalyst heater 13 forms close catalyst 13a by allowing excellent heat proof carrier, say, silica fiber to support the catalyst. It is clamped with metal nets 13b and 13c so that it may be coiled around the peripheral surface of the refrigerant solution communication pipe 9 so that it may be turned into one piece. It is, therefore, possible to carry the device in a place there is no power supply available.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is directed to a powerless refrigerator that uses a catalytic heater to generate refrigerant gas, and a powerless refrigerant gas generator for the refrigerator.

PRIOR TECHNOLOGY In the conventional diffusion absorption refrigerator, a refrigerant liquid, such as an aqueous ammonia solution, is heated in a generator, and the ammonia gas generated (vaporized) by this heating is liquefied in a condenser, and then transferred to an evaporator. This is a method in which the ammonia gas is brought into contact with hydrogen gas inside the tank to promote rapid vaporization, and the heat from the surrounding area is taken away as a result of this vaporization to cool the ammonia gas.The vaporized ammonia gas is absorbed into water again, liquefies it, and is returned to the generator mentioned above. An electric heater is used as a heating source for the refrigerant gas generator.

The problem to be solved by the invention is that the above-mentioned refrigerator requires the presence of a power source, and cannot be used outdoors or carried around in places where a power source is not available, and its range of use is limited. Currently, dry ice or ice is used in portable coolers for refrigeration without a power supply, and there is a strong need in the market for a refrigerator that does not require a power supply and has the same stable cooling performance as one using a power supply.

The present invention provides a powerless refrigerator that utilizes a catalytic heater as a refrigerant gas generator for the refrigerator.

The present invention also relates to a refrigerant gas generator that efficiently utilizes the catalytic heater.

As a result of the above, a refrigerator that does not require a power source and exhibits superior performance to that using a power source has been realized.

This also made it possible to meet the market demand for portable, power-free refrigerators.

Means for Solving the Problems The present invention configures the above-mentioned refrigerator by utilizing a catalytic heater as a means for heating an aqueous refrigerant solution and generating refrigerant gas.

In addition, as the above-mentioned refrigerant gas generator, the generator main body has a double cylinder structure, the inner cylinder is used as a refrigerant aqueous solution flow pipe, and its outer peripheral surface is surrounded by a catalytic heater, and fuel is supplied from the fuel supply port and intake port provided in the outer cylinder. A mixed gas of air and gas is introduced into the annular space around the flow pipe, and is brought into uniform contact with the catalyst heater within the space to promote a combustion reaction, thereby heating the flow pipe and the refrigerant aqueous solution within the flow pipe. This is designed to encourage the generation (vaporization) of refrigerant gas.

Function The present invention replaces the refrigerant gas generator driven by an electric heater such as the conventionally known diffusion absorption refrigerator with the generator operated by the catalytic heater described above, thereby making it possible to use an electric heater system without a power source. We have been able to provide a power-free refrigerator that provides equally stable refrigeration performance.

This makes it easy to carry and use in places where there is no power source. Further, the refrigerant gas generator fills the annular space of the heavy pipe with the mixed gas, and contacts the catalytic heater surrounding the circumferential surface of the refrigerant aqueous solution flow pipe within the annular space to generate an active and stable combustion reaction. cause

As a result, the refrigerant aqueous solution flow pipe is directly heated by the catalytic heater and at the same time heated by the high-temperature heated gas filling the annular space, which uniformly heats the refrigerant aqueous solution introduced into the flow pipe and stabilizes it. Generates refrigerant gas. As is known, this refrigerant gas is liquefied in a condenser, and then brought into contact with hydrogen gas in an evaporator to promote rapid vaporization, and as the vaporization occurs, heat from the surroundings is removed to achieve cooling.

Examples Examples of the present invention are shown in Figures 1 to '! This will be explained based on Figure J6.

FIG. 1 is a plan view showing the structural principle of a diffusion absorption type powerless refrigerator embodying the present invention. Refrigerators include refrigerators, ice packs, and coolers.

In the figure, reference numeral 1 denotes a refrigerant gas generator, and a catalytic heater is used as a heat source for heating an aqueous refrigerant solution in the refrigerant gas generator to constitute the above-mentioned diffusion absorption type powerless refrigerator.

2 is a receiver for supplying an aqueous refrigerant solution to the refrigerant gas generator 1, and 5 is a liquid receiver on the outlet side of the generator 1. This is an evaporator connected via an R1 vessel 3 and a condenser 3, and the evaporator 5 has an outlet side connected to the liquid receiver 2 via an absorber 6 to recover the refrigerant aqueous solution. There is.

An aqueous refrigerant solution, typically an ammonia aqueous solution, is supplied from the liquid receiver 2 to the catalytic heater type refrigerant gas generator 1, and heating is performed in the generator 1 by a catalytic heater.The catalytic heater is made of a suitable heat-resistant carrier. It contains platinum, palladium, etc., and when it comes into contact with a mixed gas of air and fuel consisting of an organic volatile agent such as alcohol or butane, it undergoes a violent combustion reaction. This heat of reaction heats the refrigerant aqueous solution and promotes generation (vaporization) of refrigerant gas, that is, refrigerant gas is generated without a power source. This refrigerant gas is passed through the separator 3 and a low-concentration refrigerant aqueous solution is collected from the refrigerant gas into the liquid receiver 2 through the recovery pipe 7, while only the dry refrigerant gas is supplied to the condenser 4 and liquefied. The liquid is introduced into the evaporator 5 while being brought into contact with hydrogen gas supplied through the supply pipe 8a to promote rapid vaporization. At this time, it absorbs heat from the surrounding area and produces a cooling effect. The hydrogen gas is sealed in the system in order to naturally circulate the gas in the evaporator S.

The refrigerant liquid in the evaporator S contains a large amount of hydrogen gas near the outlet and becomes heavy, and this is caused to circulate naturally due to the difference in specific gravity. The refrigerant liquid thus cooled returns to the liquid receiver 2 together with hydrogen gas via the absorber 6 and is dissolved into water. The hydrogen gas in the receiver 2 is made to flow to the outlet of the condenser 4, ie, the inlet of the absorber 6, through the bypass pipe 8b. This hydrogen gas facilitates the natural circulation of the refrigerant gas.

The refrigerant liquid collected in the liquid receiver 2 is again supplied to the catalytic heater type refrigerant gas generator 1, and the above operation is repeated.

In this way, a refrigerator using a catalytic heater that performs cooling without a power source is constructed.

From FIG. 2 onwards, a specific example will be shown in which the catalytic heater type refrigerant gas generator 1 is made to function more rationally.

The refrigerant gas generator 1 has a double cylinder structure. The inner cylinder is a refrigerant aqueous solution flow pipe 9, and the outer cylinder 10 surrounds the flow pipe 9 and forms an annular space 11 between it and the flow pipe 9. The inlet of the refrigerant aqueous solution flow pipe 9 is connected to the liquid receiver 2 in the refrigeration system shown in FIG. 1, and the outlet thereof communicates with the evaporator 5 and is connected, for example, to the separator 3 in the system.

A catalytic heater 13 surrounds the circumferential surface of the refrigerant aqueous solution flow pipe 9 and is installed in the annular space 11 . The catalytic heater 13 is made of a heat-resistant carrier with high air permeability, such as fibers such as silica fibers, which hold the catalyst to form a cross catalyst 13a, which covers the circumferential surface of the refrigerant aqueous solution flow pipe 9. As shown in FIGS. 5 and 6, they are sandwiched between gold w413b and i3c and are integrally wrapped around the circumferential surface of the refrigerant aqueous solution flow pipe 9.

The inner wire 13b forms a ventilation F112 on the circumferential surface of the refrigerant aqueous solution flow pipe 9 due to the braided structure of the net itself. That is, the cross catalyst 13a is wrapped in a non-adherent state so that its inner surface can be vented to the circumferential surface of the flow pipe 9. Further, the outer wire mesh 13c holds the cloth catalyst 13a together with the inner wire w413b on the circumferential surface of the flow pipe 9 and maintains the wrapped state.

Instead of the outer wire mesh 13c, wires, strips, or other air-permeable materials may be used to bind the cloth catalyst 13a as long as it does not impede the air permeability to the surface of the catalyst 13a.

A fuel supply port 14 communicating with the annular space 11 in the outer cylinder 10
An air intake port 15 is provided, and an exhaust port 16 is further provided. The fuel supply port 14 and the intake port 15 are arranged close to each other at one end of the outer cylinder 1o, and the exhaust port 16 is arranged at the other end remote from the supply port.

As a fuel supply means, for example, a liquid fuel container 17 is formed as shown in FIG. is soaked in the liquid fuel 24 in the container 17 so that the suction material 18 is constantly impregnated with the liquid fuel 24 through the liquid passage port 20 provided at the lower end C, and the suction tube 19 is immersed in the liquid fuel 24 in the container 17.
The upper end opening surface is exposed to the outside of the container and communicated with the intake port 14, and the fuel volatilized from the suction material 18 exposed at the upper end opening surface of the suction tube 19 is supplied into the annular space 11.

The fuel container 17 is removably connected, for example by fitting the upper end of the suction tube 19 into the fuel supply port 14 of the outer tube 10, and forms a unit with the generator 1. Of course, the suction tube 19 and the fuel supply port 14 may be connected via a hose or a vibrator.

As a means for forming the intake port 15, for example, as shown in FIG. , the container 17 is provided with a standoff 22 to draw air from the bottom surface of the container, and
1 is opened near the upper end surface of the wicking material 18, and the air rising through the wicking material 18 promotes volatilization of the fuel 24 from the surface of the wicking material 18, mixes with the volatile fuel, and forms the annular shape. so as to be introduced into the space 11. The fuel container 17 is provided with a removable lid 23, and the suction tube 19'HL and the extraction tube 21 are attached to the lid 23 so that the fuel can be refilled while being removable together. Make it.

Refrigerant gas generator 1 combined with a fuel supply source as described above
is formed. As a preferable example, the refrigerant gas generator 1
is installed in the refrigerator so as to be inclined with respect to the ground in the axial direction, as shown in FIG. 2C.

The angle of inclination is, for example, in the range of 5' to 30 degrees, and the fuel supply port 14 and intake port 15 are arranged at the lower end of the inclination, and the exhaust port 16 is arranged at the upper end of the inclination.

Further, as an example, as shown in FIG. 4, the generator 1 is installed at an angle as described above, and at the same time, the refrigerant water container flow pipe 9 is installed at the inlet side (lower end side of the inclination) with respect to the outer cylinder 10 as shown in FIG. As shown, it is arranged eccentrically toward the upper part, and the outlet side (slanted upper end side) is arranged so that it has the same name as the toothpick outer cylinder 10 shown in Fig.'j46. In this embodiment, the outer cylinder 10 of the generator is 3
Although it is inclined upward as shown in Fig. 42, the flow pipe 9 can be made horizontal or inclined downward.

In this way, a mixed gas of fuel and air is supplied from the fuel supply port 14 and the intake port 15, and the gas mixture flows through the annular space 11 to the catalytic heater 1.
3 from the lower end to the upper end, and during this period, a more intense and active combustion reaction occurs with the open heater 13 &: and the exhaust gas is discharged from the exhaust port 16.

The wire mesh 13b is caused by the combustion reaction by the catalytic heater 13.
becomes red hot, and the refrigerant aqueous solution flow pipe 9 heats up. At the same time, the annular space 11 is filled with hot air to promote heating of the flow pipe 9. The flow pipe 9 is uniformly heated over the entire length of the outer cylinder 10, heats the refrigerant aqueous solution provided therein, and regularly generates refrigerant gas. As explained in FIG. 1, this refrigerant gas is passed through the separator 3 and the condenser 4, liquefied, and supplied to the evaporator 5 for cooling.

FIG. 3 shows an embodiment in which the refrigerant gas generator 1 is made vertical. The refrigerant water mtti and the mixed gas are supplied from the lower end of the flow pipe 9 and the outer cylinder 10, and
The combustion reaction is promoted by the catalytic heater 13.

In any of the embodiments, the generator 1 may have a straight tube shape as described above, or may be meandering or bent to improve reaction efficiency.

The present invention also suggests that the refrigerant gas generator described above can be used as a liquid heater for obtaining heated liquid such as hot water instead of generating refrigerant gas. The tff1 body is water, oil, etc. In this case, the refrigerant aqueous solution in the above description may simply be read as liquid.

As described in detail of the invention, by using a power-free refrigerator that utilizes a catalytic heater as the refrigerant gas generator in the above-mentioned refrigerator, a refrigerator that does not require a power supply and exhibits superior performance to that using a power source has been realized, and is portable. This product was able to meet the market demand for power-free refrigerators.

In the present invention, instead of a refrigerant gas generator driven by an electric heater such as a conventionally known diffusion absorption refrigerator, a generator operated by the catalytic heater can be used, and the electric heater-driven diffusion Electric i! provides stable refrigeration performance comparable to absorption refrigerators! We were able to provide a li refrigerator.

Further, the refrigerant gas generator fills the annular space of the double pipe with the mixed gas, and contacts the catalytic heater surrounding the circumferential surface of the refrigerant aqueous solution flow pipe within the annular space to generate an active and stable combustion reaction. As a result, the aqueous refrigerant solution flow pipe is directly heated by the catalytic heater and at the same time heated by the high-temperature heated gas filling the annular space, causing the aqueous refrigerant solution introduced into the flow pipe to It is possible to uniformly heat the refrigerant gas and stably generate refrigerant gas, and by supplying this to the evaporator via the condenser, good cooling performance can be exhibited.

[Brief explanation of drawings]

Fig. 1 is a plan view showing the structural principle of a diffusion absorption type powerless refrigerator as an embodiment of the present invention, Fig. 2 is a longitudinal sectional view illustrating the specific structure of a refrigerant gas generator used in the refrigerator, and Fig. The figure is a vertical sectional view showing another example, FIG. 4 is a cross sectional view of the generator showing another example, FIG. 5 is a vertical sectional view showing an example of the structure of the catalytic heater, and FIG. be. DESCRIPTION OF SYMBOLS 1... Refrigerant gas generator, 2... Delivery device, 3... Evaporator, 4... Separator, 5... Condenser, 6... Absorber, 9... Refrigerant aqueous solution Flow pipe, 10... Outer cylinder, 11
... Annular space, 13... Catalyst heater, 13a...
Cross catalyst, 13b, 13c... wire mesh, 14... fuel supply port, 15... air intake port, 16... 41F air port,
17... Fuel container, 18... Suction material, 19... Suction tube, 21... Collection tube, 24... Fuel.

Claims (2)

[Claims] (1) A refrigerator characterized in that a catalytic heater is used as a heat source for heating an aqueous refrigerant solution in a refrigerant gas generator. (2) The periphery of the refrigerant aqueous solution flow pipe is covered with an outer cylinder to form a double cylinder structure, and a catalytic heater is arranged in the annular space inside the outer cylinder and the refrigerant aqueous solution flow pipe, so that the circumferential surface of the refrigerant aqueous solution flow pipe is At the same time, a fuel supply port, an air intake port, and an exhaust port are provided in the outer cylinder, and a mixed gas of air and fuel is supplied to the annular space through the fuel supply port and the air intake port to cause the catalytic heater to A powerless refrigerant gas generator characterized by having a configuration that promotes a combustion reaction, heats a refrigerant liquid flow pipe, and vaporizes the refrigerant liquid.