JPH0643646Y2 - Refrigerator flow path - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a flow path of a refrigerating device, and more specifically, to a regenerator (a regenerator is one of the components. The present invention relates to a flow path of a refrigerating device using a Gifode McMahon cycle type, a Solvay cycle type, and a Stirling cycle type refrigerator.

(Prior Art) This type of refrigeration system is, for example, a superconducting quantum interferometer (SQUI
D), Nuclear Magnetic Resonance Computer Tomography (NMR-CT)
Although these devices are extremely disliked by mechanical vibration and electrical noise generated from the refrigerator itself, in the conventional refrigeration device, a cold part for cooling the cooled object is used. It was installed away from the refrigerator.

However, in this type of refrigerating apparatus, the refrigerant discharged from the compressor to the refrigerator side is cooled by the refrigerator,
After cooling the object to be cooled in the cold section, it is returned to the compressor, but in order to improve the refrigeration efficiency, the refrigerant discharged from the compressor and the depressurized and lowered temperature by the Jewry Thomson valve are returned to the compressor. It exchanges heat with the generated refrigerant.

(Problems to be solved by the invention) However, in the conventional refrigerating apparatus of this kind, since the Gyur-Thomson valve was provided on the cold side, when the refrigerant passed through the Gyur-Thomson valve, there was a sudden decrease. A pressure change occurs, which causes instability in the pressure of the refrigerant after depressurization and transmission of vibration to the cooled object.

Therefore, the present invention aims to eliminate such defects.
This is a technical issue.

[Constitution of device]

(Means for Solving the Problems) In order to solve the above technical problems, the technical means taken in the present invention is the first means in which a compressor and a refrigerant flow in opposition to each other.
A heat exchanger having a passage and a second passage, a refrigerator having a cooling unit, and a cooling unit arranged at a distance from the heat exchanger and the main body accommodating the refrigerator, After the refrigerant discharged from the discharge port of the compressor passes through the first passage of the heat exchanger or after passing through the first passage of the heat exchanger and the cooling section of the refrigerator, the transfer pipe is Refrigeration which passes through to cool the cold section and return to the main body side, and then return to the suction port of the compressor through the cooling section of the refrigerator and the second passage of the heat exchanger. In the flow path of the device, the refrigerant passes through the Joule-Thomson valve disposed in the main body after passing through the cold section and before passing through the second passage of the heat exchanger. This is a flow path of the refrigeration system, which is designed to be weakened.

(Effect) Therefore, even when a sudden pressure change occurs when the refrigerant passes through the Gyur-Thomson valve, the Gyur-Thomson valve and the cold part are separated from each other. It does not cause pressure fluctuations or vibrations of the object to be cooled, and can solve the problems of the prior art.

(Embodiment) An embodiment of the present invention will be described below with reference to the accompanying drawings. In FIG. 1, a relatively high-pressure refrigerant (helium, nitrogen, argon, other gas, or mixed gas thereof) discharged from the discharge port 10a of the compressor 10 is connected to the pipe 11
Is supplied to the first passage 12a of the first heat exchanger 12 via
The refrigerant passing through the first passage 12a passes through the second passage 12b,
The temperature of the compressor 10 is lowered by exchanging heat with the low-temperature refrigerant flowing toward the suction port 10b of the compressor 10. The refrigerant flowing out of the first passage 12a of the first heat exchanger 12 passes through the transfer pipe 13 and surrounds the cooled body 16 attached to the cold generating portion 15 arranged apart from the main body 14. After cooling the heat radiation blocking section 17, it returns to the main body 14 side through the transfer pipe 18, and is cooled by the first freezing section 19a of the refrigerator 19 arranged in the main body 14. .

The refrigerant cooled in the first cooling unit 19a of the refrigerator 19 is the second
When passing through the first passage 20a of the heat exchanger 20, the heat is exchanged with the refrigerant passing through the second passage 20b to lower the temperature, and the second cooling unit 19b of the refrigerator 19 cools the heat. The refrigerant cooled here is sent to the cold section 15 through the transfer tube 21, cools the cooled object 16 disposed in the cold section 15, and then passes through the transfer tube 24 to the main body 14 They are coming back to their side.

Then, the refrigerant returned to the main body 14 side is decompressed and cooled by the Jouille-Thomson valve 22, and then, as described above, in the second heat exchanger 20 and the first heat exchanger 12b, is replaced with the refrigerant. While exchanging heat, the temperature is raised to near room temperature, and the suction port 10b of the compressor 10
Be returned to.

Further, the transfer pipe 13 is passed through the heat insulating parts 23 of the transfer pipes 21, 24, and the heat insulating part 23 is cooled by the refrigerant passing through the transfer pipe 13. In this way, it is possible to prevent the cold transfer efficiency of the refrigerant from being lowered due to the heat entering the transfer tubes 21 and 24.

The first heat exchanger 12, the transfer pipe 13, and the first cooling unit 9
a is removed, and the discharge port 10a and the suction port 10b of the compressor 10 are
The first passage 20a and the second passage 20b of the second heat exchanger 20 may be connected to each other. Further, the cooling of the refrigerant in the second cooling section 19b may be performed after the cooling of the cold section 15.

[Effect of device]

In order to solve the above-mentioned technical problem, as shown in FIG. 2, before sending the refrigerant to the cold section 15 through the transfer pipe 21, the Jour Thomson valve 22 is used to reduce and reduce the temperature. Good. However, with this method, the transfer tube 21
The refrigerant passing through has a relatively low pressure, and in order to avoid pressure loss, the diameter of the pipe must be made larger than that of a relatively high refrigerant. Then, as the inner surface of the pipe increases, the heat penetration into the transfer pipe increases.

The precooling time increases with the heat capacity of the transfer tube.

The problem occurs.

On the contrary, in the present invention, since the refrigerant returns to the refrigerator side through the transfer pipe and then passes through the Shell-Thomson valve, the refrigerant flowing in the transfer pipe remains at a relatively high pressure. Therefore, the above-mentioned problems do not occur.

[Brief description of drawings]

FIG. 1 is a schematic view of an embodiment of a flow path of a refrigerating apparatus according to the present invention, and FIG. 2 is a schematic view of an example of means for solving the problems of the prior art. 10 …… Compressor, 15 …… Cold section, 19 …… Refrigerator, 19b …… Cooling section, 20 …… Heat exchanger, 20a …… First passage, 20b …… Second passage,
21,24 ...... Transfer tube, 22 ...... Jule Thomson valve

Claims (1)

[Scope of utility model registration request] 1. A compressor, a heat exchanger having a first passage and a second passage through which a refrigerant flows in a mutually opposing manner, a refrigerator having a cooling unit, and a housing for the heat exchanger and the refrigerator. The refrigerant discharged from the discharge port of the compressor has a cold portion disposed separately from the main body of the heat exchanger after passing through the first passage of the heat exchanger, or of the heat exchanger. After passing through the first passage and the cooling section of the refrigerator, the cooling section is cooled by passing through the transfer pipe and returned to the main body side, and then the cooling section of the refrigerator and the second section of the heat exchanger. In the flow path of the refrigerating device configured to return to the suction port of the compressor via a passage, the refrigerant, after passing through the cold section, and before passing through the second passage of the heat exchanger, Allow the refrigerant to pass through the Joule-Thomson valve located inside the body And comprising, a flow path of the refrigeration system.