JPH01121666A - Cooling device - Google Patents

Abstract

PURPOSE: To suppress mechanical vibration and noise by providing a condenser, an expansion valve, an evaporator and a fluid pump comprising a superconducting coil, a pair of electrodes, a DC power supply and a heat filament. CONSTITUTION: A strong magnetic field is generated between superconducting coils 10, 11 by inducing a current between electrodes 12, 13 an refrigerant piping 8a thus producing a refrigerant flow by Lorentz force. Ionization of refrigerant is accelerated by emission of electrons from a heat filament 15 and the Lorentz force is enhanced thus realizing an efficient fluid pump 9 free from mechanical vibration.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a cooling device used in a refrigerator or the like.

Conventional technology The configuration diagram of a conventional cooling device such as a refrigerator is shown in Figure 3.
As shown in the figure. In Fig. 3, 1 is a cooling device, 2 is a condenser,
3 is an expansion valve (capillary), 4 is an evaporator, 5 is an electric compressor, and 6 is a refrigerant pipe connecting these condenser 2, expansion valve 3, evaporator 4, and compressor 5.

The operation of the cooling device configured as above will be explained below.

The refrigerant compressed by the electric compressor 5 flows through the refrigerant pipe 6, radiates heat in the condenser 2, expands in the expansion valve 3, and absorbs heat in the evaporator 4, thereby forming a refrigeration cycle.

Problems to be Solved by the Invention However, in the above configuration, since the electric compressor 6 is used, there is a problem in that mechanical vibrations and noise are generated mainly due to load fluctuations.

In view of this, an object of the present invention is to provide a cooling device that does not generate mechanical vibrations or noise.

Means for Solving the Problems In order to solve the above problems, the cooling device of the present invention includes a condenser, an expansion valve, an evaporator, and a fluid pump, and the fluid pump is arranged close to the refrigerant pipe. A superconducting coil, a pair of electrodes located in the refrigerant pipe corresponding to the superconducting coil, a DC power supply connected to this electrode, and a hot filament located near the electrode in the refrigerant pipe. It is composed of

Function: With the above-described configuration, the present invention can generate a flow of refrigerant due to Lorentz force by generating a current between the electrodes in the refrigerant pipe and further generating a strong magnetic field in the superconducting coil. Furthermore, the ionization of the refrigerant is promoted by the electron emission of the hot filament, making it easier for current to flow between the electrodes and increasing the Lorentz force, making it possible to form an efficient fluid pump without mechanical vibration.

EXAMPLE Hereinafter, an example of the cooling device of the present invention will be described with reference to the drawings. Incidentally, in order to avoid duplication of explanation, the same parts as in the conventional example are given the same reference numerals and the explanation will be omitted.

FIGS. 1 and 2 show an embodiment of the cooling device of the present invention.

7 is a cooling device, 8 is a refrigerant pipe, and 9 is a fluid pump. The fluid pump 9 includes a pair of superconducting coils 10.11 adjacent to the refrigerant pipe 8a of the fluid pump 9 section, and a pair of superconducting coils 10. A pair of electrodes 12 and 13 are constructed. The superconducting coils 10.11 are formed such that magnetic flux flows from the superconducting coil 1° toward the superconducting coil 11. Electrodes 12,13 are connected to a DC power source 14, electrode 12 being positive and electrode 13 being negative.

16 is a hot filament arranged between electrodes 12 and 13 in the refrigerant pipe 8a.

Note that S r B is a material that exhibits superconductivity near room temperature.
a YCu 307-δ is known. During production, first the raw material powder is crushed and mixed. That's 920
After baking in air at ℃ for 5 hours, it is ground and turned over three times. The powder is shaped, sintered by heating in air at 1000° C. for 5 hours, and cooled in a furnace. The sintered body thus produced exhibits superconductivity at 338 K (66° C.).

[Ihara et al., Japanese Journal of Applied Physics
APPLIED PHYSIC8), Vol, 26
．． 48, August, 1987.

PP, 167-171) The operation of the cooling device configured as above will be described below.

The refrigerant in the refrigerant pipe 8a of the fluid pump 9 is connected to the positive and negative electrodes 1.
2.13, the current is ionized and current flows from the electrode 12 to the electrode 13. On the other hand, a strong magnetic flux is generated between superconducting coils 10 and 11 by superconducting coil 1.
0 toward the superconducting coil 11. Therefore, the current flowing between the electrodes 12 and 13 and the superconducting coil 10
．． The magnetic flux flowing between 11 generates a Lorentz force, and the ionized refrigerant moves toward the condenser, creating a flow of refrigerant toward the condenser and circulating through the cooling device. Since the expansion valve 3 is interposed between the condenser 2 and the evaporator 4, the refrigerant has a high pressure on the condenser 2 side and a low pressure on the evaporator 4 side, forming a cooling cycle in which heat is radiated in the condenser 2 and heat is absorbed in the evaporator 4. can do.

Furthermore, the ionization of the refrigerant is promoted by the collision with the electrons emitted from the hot filament 15, making it easier for current to flow between the electrodes, increasing the Lorentz force, increasing the refrigerant flow rate, and increasing the capacity. can be improved.

As mentioned above, since the refrigerant flow is electromagnetically generated by the Lorentz force, no mechanical vibration noise is generated.Furthermore, since the flow is generated with a continuous and constant force, there is no pressure pulsation of the refrigerant, and the refrigerant Since the generation of vibration and noise in the piping system can also be prevented, extremely effective noise reduction can be achieved.

Moreover, since the hot filament can facilitate the flow of current between the electrodes, the flow rate of the refrigerant can be increased by increasing the Lorentz force, the capacity can be improved, and an efficient cooling system can be formed.

Furthermore, since the flow rate of the refrigerant changes due to changes in the Lorentz force, that is, changes in the magnetic flux, the superconducting coil 10.1
In addition to being able to control the flow rate of the refrigerant by controlling the current flowing through the electrodes 12 and 1, the flow rate of the refrigerant can also be controlled by controlling the voltage between the electrodes 12 and 13, making capacity control extremely easy.

Effects of the Invention As described above, the present invention provides a cooling device for use in refrigerators, etc., which includes a condenser, an expansion valve, an evaporator, and a fluid pump, and the fluid pump is arranged close to a refrigerant pipe. Consisting of a superconducting coil, a pair of electrodes located in the refrigerant pipe corresponding to the superconducting coil, a DC power supply connected to this electrode, and a hot filament located near the electrode in the refrigerant pipe. By doing so, an electric current is generated in the refrigerant between the electrodes in the refrigerant pipe, and a strong magnetic field is generated by the superconducting coil to generate a flow of refrigerant due to the Lorentz force, creating a fluid pump without mechanical vibration. Furthermore, since the refrigerant flow is generated with a continuous and constant force, there is no pressure pulsation in the refrigerant and vibration noise in the refrigerant piping system can be prevented, resulting in extremely effective noise reduction. Since it is possible to make it easier for the current to flow between the electrodes (hot filament), it is possible to increase the flow rate of the refrigerant due to the increase in the Lorentz force, improve the capacity, and form an efficient cooling system. Capacity can be easily controlled by controlling the current flowing through the superconducting coil and the voltage between the electrodes.

[Brief explanation of the drawing]

FIG. 1 is a sectional view taken along the line A-A of a fluid pump of a cooling device showing an embodiment of the present invention, FIG. 2 is a block diagram of the same cooling device, and FIG. 3 is a block diagram of a conventional cooling device. 8a...Refrigerant piping, 9...Fluid pump, 10°11...Superconducting coil, 12.13.
... Electrode, 14 ... DC power supply, 16 ...
...hot filament. Name of agent: Patent attorney Toshio Nakao and 1 other person 8a
- Refrigerant piping 9 - Fluid pump to, t/-M'e, bar coil/2. /, 3--one electrode 14- direct emotion, 1st 1st r3 ts-11 filament/@211m

Claims (1)

[Claims] The fluid pump includes a condenser, an expansion valve, an evaporator, and a fluid pump, and the fluid pump includes a superconducting coil disposed close to a refrigerant pipe and a pair of electrodes located in the refrigerant pipe corresponding to the superconducting coil. and a DC power supply connected to this electrode,
and a hot filament located near the electrode in the refrigerant pipe.