JPS62206349A - Cooling device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a cooling device, and more particularly to a cooling device that allows use of a wide range of heat sources.

(Prior Art) Various types of refrigerators have been used in the past, and one of them is a steam injection refrigerator as shown in FIG. 3, for example.

This diagram schematically shows a steam injection refrigeration cycle, in which fluid (generally steam or water is used) is ejected at high speed from an ejector nozzle, absorbing surrounding gas, and creating a high vacuum. This method lowers the pressure, lowers the saturation temperature of the refrigerant (water), causes fibers to form even at temperatures below room temperature, and uses the latent heat of evaporation to cool the refrigerant (water) itself.

That is, in the figure, to explain the case where water is used as a refrigerant, water a whose temperature has increased by cooling an object to be cooled enters an evaporator C by a circulation pump b and is circulated. Further, the pressure inside the evaporator C is reduced by ejecting steam at high speed from the nozzle e in the ejector d, whereby the steam inside the evaporator C is attracted and absorbed, and the internal pressure is lowered. Then, the inside of the evaporator C becomes a vacuum, the saturation temperature of the water drops, and it begins to boil, cooling the water by absorbing the latent heat of evaporation from the water itself.

This cooled water passes through pump b and cools the target substance.

Further, a mixture of high-velocity steam passing through the ejector and steam generated within the evaporator enters the condenser f and is condensed. A portion of this water is supplied to the evaporator C, and the rest is supplied to the boiler i, which produces steam ejected from the nozzle.

(Problems to be Solved by the Invention) The manufacturing cost of the conventional refrigerator described above is relatively low, but since the operating coefficient is low, it is not economical unless cheap steam or waste gas is available.

Steam injection refrigerators require a boiler, so they require a large amount of space.

Moreover, it requires time and effort to manage the boiler, it is impossible to make the whole system compact, and it is not suitable for home use, vehicle use, etc.

It is an object of the present invention to solve the above-mentioned problems and to provide a refrigerator that is compact and easy to handle without using special equipment such as a boiler.

(Means and effects for solving the problems) The present invention has been made in view of the above points, and includes a heat medium heating and pressure feeding device, an evaporator, a diffuser comprising a nozzle and a constriction portion, and a cooling fin. A cooling device is constructed by sealingly connecting a cooling pipe with a cooling pipe and enclosing a heat medium therein, and the heat medium in a gas-liquid mixed state is heated and pressure-fed into the evaporator from the heat-medium heating and pressure-feeding device. The medium is further heated in the evaporator to form high-pressure steam, and this medium vapor passes through the diffuser, is liquefied in the cooling section, and returns to the heat medium heating device again, thereby continuously heating and pressurizing the medium, and further adding to the closed circulation circuit described above. The evaporator and the medium container are connected by a pipe, a part of the pipe is used as a cooler, a liquid level maintenance valve is provided in the medium container, and the pressure inside the medium container is reduced by a diffuser. The medium is replenished into the medium container in a cooled state using the difference in internal pressure between the evaporator and the medium container through four pipes, and a liquid level maintenance valve ensures that only the required amount of medium flows in.

Further, the temperature of the medium in the medium container is reduced by low-temperature evaporation.

(Example) An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic diagram illustrating a cooling device according to an embodiment of the present invention.

In the figure, 1 is a heat medium heating and pressure feeding device, 2 is an evaporator, and 3
is a conduit. 4 is a nozzle, 9 is a constriction part, and conduit 1
3 together form a diffuser. Reference numeral 19 denotes a conduit, and 8 a cooling tube provided with a cooling fin 7, which is hermetically connected to each of the above-mentioned components and encloses a heat medium therein with extremely high purity.

Reference numeral 12 denotes a medium container connected to the bottom of the evaporator 2 by a pipe lO, and the inlet section may be provided with a liquid level maintenance valve consisting of a float 16, a connecting rod 15, and a valve 14, for example, as shown in the figure. be.

In this way, a part of the pipe IO is used as a cooler 11.

Internal pressure of evaporator 2 (high pressure) and internal pressure of medium container 12 (low pressure)
Using the pressure difference between float 16. Connecting rod 15. Valve 1
The liquid level in the medium container 12 is maintained constant using a liquid level maintenance valve constituted by 4.

A portion of the medium R is replenished into the medium container 12.

A conduit 13 is provided at a position higher than the liquid level of the medium container 12, and is connected to a diffuser section consisting of a nozzle 4 and a constriction section 9 via this conduit 13.

Note that although the P section is a solar heat receiving device, the heat source is not limited to this and any suitable heat source can be used.

The pipes A and B are circulation pipes for hot water or hot air guided from the heat source P, and a part of the pipes are connected to the heating part jacket 5 of the heat medium heating device 1.
while the other part is guided to the jacket 6 of the evaporator 2.

The heat medium (hereinafter referred to as medium) R in a mixed state of gas and liquid is now heated and pressure-fed into the evaporator 2 from the heat-medium heating and pressure-feeding device 1.
is further heated in the evaporator 2 to form high-pressure steam. The medium vapor R passes through a diffuser consisting of a nozzle 4 constriction section 9 and a conduit 13, is liquefied in a cooling section 7.8, and returns to the heat medium heating device 1 again. The liquid that is liquefied in the cooling section 7.8 is Thermosiphon (trade name Heatvibe).
In other words, when the medium is sealed in a vacuum container and there is no temperature difference between the heating section and the cooling section, it is filled with saturated vapor of the medium and is in equilibrium. When such a temperature difference is applied, the medium at the bottom boils and liquefies in the cooling section due to a slight temperature difference.

Heating of the medium in the above-mentioned sealed circuit.

In the circulation process of evaporation, cooling, and liquefaction, the pressure inside the medium container 12 connected to this circuit is reduced by the suction of the diffuser, and the enclosed medium S (same as medium R) is induced to undergo low-pressure evaporation and its temperature decreases. descend.

Note that by using the heat exchanger 17 and the radiator 18, it can be taken out of the medium container 12 as cold air or cold liquid and used for any desired purpose.

Next, FIG. 2 is a detailed explanatory diagram of the heat medium heating and pressure feeding device 1 shown in FIG. 1, and the left end of FIG. 2 means the upper position of FIG. 1.

In the figure, 21 is a tube body connected to the cooling pipe 8.

The cooled liquefied medium fills the pipes 47,46. 22 is a member that connects the tube body 21 and the cylinder 23, and is provided with a spring seat for the piston pressing spring 36. The inner surface of the cylinder 23 is smooth and precisely machined to allow the piston 27 to slide freely in an airtight manner, and the outer periphery is provided with heat radiation cooling fins.

The outer cylinder 24 is connected to the cylinder 23, its outer periphery serves as a heating surface, and its inner periphery forms a one-ring cylindrical slit 48 with the inner cylinder 26. Further, an outer cylinder 5 is attached to the outer periphery, and hot air or hot liquid flows in from the conduit A.

The outer cylinder 24 is heated and flows out from the conduit B. Note that a cylindrical body 25 is provided at the right end of the figure.

The right end of the inner cylinder 26 is pressed against the valve seat 37, so that the valve surface is machined to maintain the internal pressure of the slit 48, and the left end has a sliding part that slides smoothly and airtightly on the inner surface of the piston. has been processed.

Furthermore, a flange 44 is provided. Also spring 30
．． Valve 29. The valve body 33 forms a check valve.

Allows the liquid medium to flow only in the right direction in the figure.

41 and 42 are medium passages. Further, the piston 27 is designed to be able to slide smoothly and airtightly on the inner surface of the cylinder 23.

A piston lid 28 with a check valve (spring 32, valve 31, valve body 34) provided in the center is screwed together.

This check valve allows the two-liquid medium to flow only in the right direction in the drawing. The inner cylinder pressing spring 35 and the piston pressing spring 36 have approximately the same pressing force (with 36 being a slight chord), and the inner cylinder pressing spring 35 has the right end of the inner cylinder 26, the valve surface 45, the valve seat 37. The piston pressing spring 36 presses the piston 27 to the left end of the outer cylinder 24.

Now, when the medium in the slit 48 is heated by the heat source that heats it through the outer cylinder 24 and evaporates, the internal pressure of the slit 48 increases.

The piston 27 resists the pressing force of the piston pressing spring 36 and begins to move to the left.

The inner cylinder 26 remains at the current position due to the pressing force of the inner cylinder pressing spring 35.

As the piston 27 moves to the left, the volume of the inner chamber 43 expands, and the medium filling the inner chamber 46 is sucked into the inner chamber 43 . The piston 27 further moves to the left, and the inner cylinder 26
When the flange 44 and the piston 27 are in contact with each other, the inner cylinder 26
The right end of the valve surface 45 is away from the valve seat 37, and the spout 40
Both the evaporated medium and the unvaporized liquid medium are ejected into the pipe body 25.

The volume of the annular cylindrical slit 48 on the left end side (the upper position according to the arrangement in FIG. 1) is gradually increased in volume, so that the medium vaporized during evaporation and vaporization due to heating is located above, and the unvaporized medium is One of the important points of the present invention is to take care not to leave even the slightest amount of unvaporized medium in the annular cylindrical slit 48 after injection by setting the position of the passage 42 downward.

When the injection is completed, the pressure inside the slit 48 decreases, and the spring 35 causes the right end valve surface 45 of the inner cylinder 26 to
is pressed onto the valve seat 37, and the slit 48 is sealed.

Further, the piston 27 starts to move to the right by the spring 36, and the volume inside the chamber 43 is reduced, and the medium inside the chamber 43 is sent into the annular cylindrical slit 48 through the passage 41.42 by the function of the check valve 29.31. and evaporate again.

The pressure is increased and the above-mentioned operation is repeated continuously and in rapid cycles to heat and pump the medium from X to Y direction.

That is, by providing a narrow slit-shaped evaporation section made of double pipes and skillfully relating the functions of the inner cylinder and the piston, it is possible to continuously heat and pump the medium.

This heat medium heating and pressure feeding device is extremely compact and can be manufactured in a small size.

Further, a large number of them can be provided in parallel in the circuit if necessary.

Furthermore, as described above, in this invention, the heat medium heating and pressure feeding device and the medium replenishment device are combined, and the properties of the heat medium (freon, methanol, ammonia, water, etc.) are appropriately selected according to the heating and heat source conditions. Applicable.

(Effect of the invention) This invention is constructed as described above in detail.

A refrigeration system that has an extremely compact structure and can continuously heat and pump a medium can be obtained.

Since it does not require equipment such as a boiler, it takes up a small space and does not require maintenance, and can be left unattended at all times, making it suitable for home use.

It is extremely convenient for use in vehicles and the like.

In addition, by combining a heat medium heating and pressure feeding device and a medium replenishment device,
The properties of the heat medium can be selected appropriately according to the heating and heat source conditions, making it possible to use a wide range of heat sources, enabling energy conservation, and making effective use of even the slightest temperature difference in natural energy. This makes it possible to obtain an excellent cooling device.

[Brief explanation of drawings]

FIG. 1 schematically shows a cooling device according to an embodiment of the present invention, FIG. 2 is an explanatory diagram showing details of the heat medium heating and pressure feeding device of FIG. 1, and FIG. 3 shows a conventional device. l... Heat medium heating and pressure feeding device 2... Evaporator 3... Pipe line 4... Nozzle 7... Cooling fin 8... Cooling tube 9... Throttle part 10... Tube 12 ...Medium container 13...
Conduit 14...Valve 15...Connecting rod 16...Float 19...
Pipe line 21... Pipe body 22... Connecting member 2
3... Cylinder 24... Outer cylinder 26... Inner cylinder 27... Piston 28... Piston lid 29.
...Valve 30...Spring 31...Valve
32... Spring 33, 34... Valve body
35...Inner cylinder pressing spring 36...Piston pressing spring 37...Valve seat

Claims (4)

[Claims] (1) A diffuser comprising a heat medium heating and pressure feeding device, an evaporator, a nozzle, a constriction section, and a conduit for the medium container;
A cooling device characterized in that cooling pipes are hermetically connected to each other by pipes, and a heat medium is sealed inside the pipes. (2) The heat medium heating and pressure feeding device has a cylinder, a piston, an outer cylinder coupled to the cylinder, and an inner cylinder, and a cylindrical slit is formed between the outer cylinder and the inner cylinder. In addition, a check valve is installed at one end of the inner cylinder and the piston, and the piston is pressed by an inner cylinder pressing spring and a piston pressing spring, and a valve surface is provided at the other end of the inner cylinder and is pressed against the valve seat. A cooling device according to claim 1, configured as follows. (3) The cooling device according to claim 1, wherein the evaporator and the medium container are connected by a pipe in the sealed conduit, and a part of the pipe is used as a cooler. (4) The medium container has therein a liquid level maintenance valve consisting of a float, a connecting rod, and a valve, claim 1.
Cooling device as described in section.