JPH0555785B2 - - Google Patents

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 injected at high speed from the ejector nozzle, absorbing surrounding gas and creating a high vacuum. It lowers the pressure and saturation temperature of the refrigerant (water), causes it to boil even 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 h at a 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 d and steam evaporated in the evaporator c enters the condenser f and is condensed.

A portion of this water is supplied to the evaporator c, and the remainder is supplied to the boiler i, which produces steam h spouted from the nozzle e.

(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.

Since a steam injection refrigerator requires a boiler, it requires a large space, requires a lot of effort to manage the boiler, and is impossible to make compact as a whole. It is not suitable for any purpose.

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 for Solving the Problems) The present invention has been made in view of the above points, and is based on a heat medium heating and pressure feeding device having a heating part mantle provided with a circulation path for hot water or hot air guided from a heat source. A heat medium in a gas-liquid mixed state is pumped into an evaporator with a jacket, and the medium vapor is further heated and high pressure is sent into the pipe through a pipe and a diffuser, where it is liquefied in a cooling section and sent to a heat medium heating and pumping device. In a cooling device in which a sealed circuit is formed for the heat medium to be returned, the bottom of the evaporator and the bottom of the medium container are communicated with each other by a pipe partially serving as a cooling pipe, and the medium container has a heat exchanger and a radiator. In addition, a liquid level maintenance valve is provided for replenishing a portion of the medium to the medium container, and a conduit is provided at a position higher than the liquid level of the medium container, and the low pressure medium is configured to be guided to the diffuser through the conduit. did.

(Function) The heat medium in a gas-liquid mixed state heated and pressure-fed into the evaporator from the heat-medium heating and pressure-feeding device is further heated in the evaporator to become high-pressure dry vapor, and this medium vapor is liquefied again in the cooling section via a diffuser. Returning to the heat medium heating and pumping device, the medium is continuously heated and pumped, and the medium in the medium container is evaporated at a low temperature to lower its temperature.

In addition, the medium is refilled into the medium container in a cooled and liquefied state by using a conduit with a part as a cooler, making use of the difference in internal pressure between the evaporator and the medium container, and a liquid level maintenance valve is used to maintain the required amount of medium. The only thing that was allowed to flow in.

(Example) An example of the present invention will be described below based on 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 pipe line.

4 is a nozzle, and 9 is a constriction part, which together with the conduit 13 forms 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.

12 is connected to the bottom of the evaporator 2 by a pipe 10 of the medium container, and the inlet section is 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. It is provided.

In this way, a part of the tube 10 is used as a cooler 11, and by utilizing the pressure difference between the internal pressure of the evaporator 2 (high pressure) and the internal pressure (low pressure) of the medium container 12, the float 16,
A portion of the medium R is replenished into the medium container 12 so as to maintain the liquid level in the medium container 12 constant using a liquid level maintenance valve constituted by a connecting rod 15 and a valve 14.

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.

Pipe A and pipe B are circulation pipes for hot water or hot air guided from a heat source P, one part of which is guided to the heating part jacket 5 of the heat medium heating and pumping device 1, and the other part to the evaporator 2. is guided to the mantle 6 of

The operation of the cooling device constructed in this way can be explained by replacing it with a general loop heat pipe.
When a diff user is installed on the heating side of a loop heat pipe, the medium liquid level on the heating side, which has liquefied and accumulated at the bottom of the loop, generally falls due to the resistance of the nozzle of the diff user, and the medium liquid level on the cooling side rises. A water level difference occurs and the injection pressure of the nozzle is increased.

However, in a cooler that operates using the suction force of a diffuser, that is, when the purpose is to suck the medium saturated vapor in the medium container and evaporate the medium at a low temperature to obtain a low temperature, It is difficult to sufficiently achieve the objective by increasing the injection pressure due to the water level difference, and furthermore, it is practically impossible to increase the water level difference without limit.

Therefore, in this invention, as shown in FIG.
The cooled and liquefied medium is heated and pressurized by the heat medium heating and pressure feeding device 1, and is injected into the evaporator 2 (corresponding to the lower part of the loop) in a mixed state of gas and liquid, where it is further heated and the liquid portion is vaporized. The high-pressure dry steam was injected from the nozzle 4.

In this way, gas,
The purpose of injecting the mixed liquid is to increase the efficiency of pumping the medium (the amount of the medium). Therefore, it is impossible to vaporize and pressurize the entire amount of the medium sent into the heat medium heating and pumping device 1. , it is not necessary, but if the internal pressure reaches the required pumping pressure,
As will be described later, consideration is given to injecting the unvaporized high-temperature medium at the same time.

During the circulation process of heating, evaporating, cooling, and liquefying the medium in the sealed circuit, the pressure inside the medium container 12 connected to this circuit is reduced by the suction of the diffuser, and the enclosed medium S (medium R) is (identical) induces low-pressure evaporation and the temperature decreases.

Note that the heat exchanger 17 and the radiator 18 take out the cold air or cold liquid to the outside of the medium container 12,
It can be 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 and liquefied medium fills the inner chamber 47 of the tube body 21 and the inner chamber 46 of the cylinder 23 .

A member 22 connects the tube body 21 and the cylinder 23, and is provided with a spring seat for a piston pressing spring 36.

The inner surface of the cylinder 23 is smooth and precisely machined so that the piston 27 can 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, and its outer periphery serves as a heating surface, and its inner periphery forms an inner cylinder 26 and an annular cylindrical slit 48.

Further, a heating part jacket 5 is attached to the outer periphery, and hot air or hot liquid flows in from the conduit A, heats the outer cylinder 24, and flows out from the conduit B. Note that there is a cylinder 25 at the right end of the figure.
is provided.

A valve surface 45 is machined at the right end of the inner cylinder 26 so as to maintain the internal pressure of the slit 48 by being pressed against the valve seat 37, and a sliding surface 45 is formed at the left end to smoothly and airtightly slide on the inner surface of the piston. The moving part is machined, and a flange 44 is provided at the left end of the sliding part.

Further, a check valve constituted by a spring 30, a valve 29, and a valve body 33 is provided at the left end of the inner cylinder 26, and allows the liquid medium to flow only in the right direction in the figure.

Reference numeral 41 denotes a medium flow path bored in the axial direction through the center of the inner cylinder 26, and 42 is a plurality of medium flow paths bored in the radial direction with respect to the flow path 41. The piston 27 is made to be able to slide smoothly and airtightly on the inner surface of the cylinder 23, and a check valve composed of a spring 32, a valve 31, and a valve body 34 is built into the center of the piston lid 28 which is screwed onto the piston 27. There is.

This check valve also allows the liquid medium to flow only in the right direction in the drawing.

The inner cylinder pressing spring 35 and the piston pressing spring 36 are respectively connected to the inner chamber 43 of the piston 27.
The inner cylinder pressing spring 35 is provided in the inner chamber 46 of the cylinder 23, and the inner cylinder pressing spring 35 is located at the right end of the inner cylinder 26, at the valve surface 45.
is crimped onto the valve seat 37, and the piston pressing spring 3
6 has a piston 27 crimped to the left end of the outer cylinder 24.

The inner chambers 46, 43, flow paths 41, 42 and slit 48 communicate with each other via check valves 32, 31, 34 and 30, 29, 33.

Now, when the outer cylinder 24 is heated by the heat source, the medium in the slit 48 evaporates and 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 piston 2
The volume of the inner chamber 43 of the cylinder 23 is expanded, and the medium filling the inner chamber 46 of the cylinder 23 is transferred to the check valves 32 and 3.
1 and 34 into the inner chamber 43.

The piston 27 further moves to the left, and the inner cylinder 26
When the right side inner surface of the inner chamber 43 of the piston 27 comes into contact with the flange 44 of the piston 27, the right end of the inner cylinder 26, the valve surface 45, is separated from the valve seat 37 and the vaporized medium vapor and non-vaporized liquid are released from the spout 40 into the pipe body 25. The vaporized liquid medium is ejected together.

When the injection is completed, the pressure inside the slit 48 decreases, the piston 27 begins to move to the right by the piston pressing spring 36, and the spring 3
5, the right end valve surface 45 of the inner cylinder 26 is pressed against the valve seat 37, and the slit 48 is sealed.

Further, the piston 27 continues to move to the right by the spring 36, and the volume of the inner chamber 43 begins to decrease, causing the check valve 3
0, 29, 33 open, check valves 32, 31, 34
is closed, the medium in the inner chamber 43 is sent into the annular cylindrical slit 48 through the channels 41 and 42, heated again, evaporated and pressurized, and the above-mentioned operation is continuously repeated to move the medium from the X direction to the Y direction. to be pumped to.

In other words, by providing a narrow slit-shaped evaporation section using double pipes and skillfully linking the functions of the inner cylinder and the piston, the medium can be heated and pumped continuously. It is.

This heat medium heating and pressure feeding device is extremely compact and can be manufactured in a small size, and a large number of devices can be provided in parallel in a circuit as required.

Furthermore, as mentioned above, in this invention, by incorporating the heat medium heating and pressure feeding device into the circuit, it is possible to appropriately select and apply the properties of the heat medium (chlorofluorocarbon, methanol, ammonia, water, etc.) according to the conditions of the heat source. can.

(Effect of the invention) Since this invention is made as detailed above,
It is possible to generate medium steam continuously with an extremely compact structure, and a cooling device using heat medium steam is obtained, and since equipment such as a boiler is not required, the space is small and there is no need for management effort. It can be used in a permanent state,
It is extremely convenient for use in homes, vehicles, etc.

In addition, by appropriately selecting the properties of the heat medium according to the conditions of the heat source, it is possible to use a wide range of heat sources, and it is possible to respond to energy conservation, making it possible to effectively utilize 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. 1... Heat medium heating and pressure feeding device, 2... Evaporator, 3
... Pipeline, 4 ... Nozzle, 5 ... Mantle, 6 ... Mantle, 7 ... Cooling fin, 8 ... Cooling pipe, 9 ... Throttle section, 10 ... Pipe, 11 ... Cooling pipe, 12 ...medium container, 13 ... conduit, 14 ... valve, 15 ... connecting rod, 16 ... float, 19 ... conduit, 21 ...
Pipe body, 22... Connection member, 23... Cylinder, 2
4... Outer cylinder, 26... Inner cylinder, 27... Piston,
28...Piston lid, 29...Valve, 30...Spring, 31...Valve, 32...Spring, 33
... Valve body, 34 ... Valve body, 35 ... Inner cylinder pressing spring, 36 ... Piston pressing spring, 37
...Valve seat, 41...Medium flow path, 42...Medium flow path, 43...Inner chamber of piston, 44...Flange, 45...Valve surface, 46...Inner chamber of cylinder, 4
8... Circular cylindrical slit.

Claims (1)

[Scope of Claims] 1. Gas-liquid mixing in the evaporator 2 having a jacket 6 from a heat medium heating and pressure feeding device 1 having a heating part jacket 5 provided with circulation paths A and B for hot water or hot air guided from a heat source P. The heat medium in the state is pumped and further heated, and the high-pressure medium vapor is sent into the pipe 19 via the pipe 3 and diffusers 4 and 9, and is liquefied in the cooling parts 7 and 8, and then sent to the heat medium heating and pressure feeding device 1. In a cooling device in which a sealed circuit of the heat medium is formed so that the heat medium returns, a part of the heat medium is connected to the cooling pipe 11.
The bottom of the evaporator 2 and the bottom of the medium container 12 are connected through a pipe 10, which has a heat exchanger 17 and a radiator 18, and is used for replenishing a portion of the medium to the medium container 12. liquid level maintenance valve 1
6, 15, and 14, and a conduit 13 is provided at a position higher than the liquid level of the medium container 12, and the low-pressure medium is guided to the diff users 4, 9 through the conduit 13. Device. 2 The heat medium heating and pressure feeding device 1 includes a tube body 21 coupled to the cooling pipe 8, and the tube body 21 and the cylinder 23.
an outer cylinder 24 coupled to a member 22 and a cylinder 23, a piston 27 airtightly and slidably attached to the cylinder 23, and a lower part of a flange 44 fitted to the piston 27 airtightly and slidably. It has an inner cylinder 26, and has a medium flow path 41 bored in the axial direction at the center of the inner cylinder 26, and a medium flow path 42 bored in the radial direction with respect to the flow path 41,
An annular cylindrical slit 4 is provided between the outer cylinder 24 and the inner cylinder 26.
Check valves 30, 29, 33, 32, 31, and 34 are respectively incorporated in the center of the piston lid 28 which forms the upper end of the inner cylinder 26 and the piston 27, and the lower end valve of the inner cylinder 26. The inner cylinder pressing spring 35 that presses the surface 45 against the valve seat 37 is connected to the piston 27.
A piston pressing spring 36 for press-fitting the piston 27 to the upper end of the outer cylinder 24 is provided in the inner chamber 43 of the cylinder 23, and these inner chambers 46, 4
3. The medium in the slit 48 is evaporated by making the channels 41, 42 and the slit 48 communicate with each other and heating the outer cylinder 24. Cooling device as described.