JPS5935759A - Refrigerator - 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 The present invention relates to a refrigeration system, more specifically a compressor, an expander,
The present invention relates to a gas cycle refrigeration system composed of a regenerator and a switching valve.

A gas cycle refrigeration system introduces high-pressure gas such as helium compressed by a compressor to an expander via a switching valve, expands this high-pressure gas here to obtain an extremely low temperature, stores it in a regenerator, and stores it in a regenerator. After cooling the refrigerant, the cycle of returning it to the compressor via the angle switching valve is repeated.

In this case, the switching valve that switches between the introduction of high-pressure gas and the discharge of low-pressure gas has conventionally been composed of two solenoid valves connected in the middle of the pipe connecting the compressor and the displacer, or Since it was composed of a motor and a cam mechanism, the overall structure was complicated and large.

An object of the present invention is to provide a refrigeration system that solves this problem. For this reason, the present invention forms a switching valve that switches between introducing high-pressure gas and discharging low-pressure gas using an electromagnetic solenoid and a plunger driven by the electromagnetic solenoid, and connects the solenoid of this switching valve to the high-temperature end of the reciprocating displacer. Furthermore, one end of the plunger is used as a low-pressure gas discharge valve, and when this discharge valve is pushed by the magnetic force of the solenoid, the high-pressure gas suction valve installed at the end of the discharge valve opens. This is how it was done.

An embodiment of the present invention will be described with reference to FIG. 1. Reference numeral 1 indicates a refrigeration system, a 2.3 Fi cylinder, and 4 a case integrated with the cylinders 2 and 3.

As shown in the figure, the cylinders 2 and 3 are formed by stacking cylinders with different diameters in two stages, and inside each cylinder, a two-stage displacer 7 consisting of a large diameter part 5 and a small diameter part 6 is provided with a seal ring 8. It is slidably fitted through the angle 9. The upper part of the displacer 7 has a reduced diameter, and this reduced diameter part 10 is slidably fitted to the upper end of the cylinder 2 via a seal ring 11.

A portion 12 above the reduced diameter portion 10 of the displacer 7 serves as a high temperature end portion of the displacer 7, and further serves as a mounting portion for an electromagnetic solenoid 14 of a valve mechanism 16, which will be described later. This part is fitted into the case 4 via a seal ring 15 and has a hole 16 in its upper part. The case 4 is provided with a high pressure gas intake hole 17 and a low pressure gas discharge hole 18. The suction hole 17 is connected to the discharge side of a compressor (not shown), and the discharge hole 18 is connected to the suction side of the compressor.

The large diameter part 5 and the small diameter part 6 of the displacer 7 are each hollow, and regenerators 19 and 20 are formed therein. The large diameter part 5 and the upper and lower parts of the cylinder 2 have chambers 21 and 22.
A chamber 23 is formed between the small diameter portion 6 and the lower end of the cylinder 6. The upper part of the regenerator 19 is a reduced diameter part 10
It communicates with the hole 24 inside. A passage 25 having flow path resistance is provided between the hole 24 and the chamber 21. A passage 26 communicates between the regenerator 19 and the chamber 22. Further, the regenerator 20 and the chamber 22 communicate with each other through a passage 27, and the regenerator 20 and the chamber 22 communicate with each other through a passage 28.

The hole 24 in the reduced diameter part 10, the hole 16 in the upper part 12 and the space 2
9 are communicated with and shut off by a valve mechanism 13, respectively. This valve mechanism 13 includes a valve body 31 that is tightly and slidably provided in a hole 16 by a seal ring 60.

A spring 32 that biases the valve in the valve closing direction, a ball 36 that presses the valve body 31 in the valve opening direction, and this ball 3
It consists of a plunger 34 that presses the plunger 6, and a spring 35 that biases the plunger in the direction of opening the valve. The plunger 34 is moved downward in the figure by energizing the coil 36 of the electromagnetic solenoid 14.

The coil 36 is fixed only to the upper part 12' which serves as a frame. E blade part Kid of plunger 34, plunger 34
The anti-flyout device 67 has been removed. Valve body 3
1 is provided with a hole 8, and a passage 39 is provided between the cut diameter reduced portion 10 and the upper portion 12.

21Jζ This refrigeration system configured in this way is shown in the figure.
Sensors are provided at the locations indicated by , and these sensors detect the position of the displacer 7 to control the energization of the coil 36 for use. When the displacer 7 is at the bottom dead center slightly lower than the position shown in the figure, the coil A is detected by the sensor Q).
36 is energized, the plunger 64 descends and the valve body 31 compresses the spring 32, opening the valve.
High pressure gas enters the hole 24 through the passage 39, enters the chamber 21 through the passage 25, and! The displacer 7 is raised from the passage 26 into the chamber 22 and from the passage 28 into the chamber 23.

Next, the position of the displacer 7 that has risen is detected by the sensor (2), and the current to the coil 36 is cut off. This closes the valve body 31, but the ball 33 separates from the hole 38) provided in the center of the valve body 61 and opens. The high pressure gas in chamber 22.23 is stored in regenerator 19.20.
It expands through the air and lowers the temperature. At this time, objects to be cooled attached to the outer peripheries of the cylinders 2 and 6 are cooled. The gas in the chambers 21, 22 and 23 is then discharged from the outlet through the passages 25, 26 and 28, respectively, so that the displacer 7 is lowered. The same thing will be repeated below.

FIG. 2 shows another embodiment of the invention. In this case, the coil 36 of the electromagnetic solenoid 14 is directly attached to the frame, and only the plunger 64 is connected to the hot end of the displacer via a spring (compression spring) 35. However, in this case, in order to effectively use the magnetic flux by the coil 66 within the entire stroke range of the displacer, at least the upper part
The part 2 needs to be made of iron material, and the large diameter part of the plunger 64 also needs to be made of iron material, and its length needs to be about the same as or longer than the #1 stroke.

In this configuration, the gap 40 formed by the plunger 64 and the upper part 12 of the displacer always moves back and forth within the coil 66. At this time,
If the coil 36 is energized near the bottom dead center and de-energized near the top dead center, the displacer will be reciprocated by the pneumatic force, similar to the explanation for the embodiment shown in FIG. .

It should be noted that switching can be performed using a position yellow detector such as a photosensor at the top of the display stroke, at the bottom dead center, or at a position slightly inside of the energized paper to the -1 tile 36.

As described above, the present invention is configured so that when the discharge valve formed by the electromagnetic solenoid 14 and the plunger 34 is pushed, the high-pressure gas introduction valve opens. can be reciprocated using the pressure of high-pressure gas from the compressor. Furthermore, since the two valve mechanisms are opened and closed by one electromagnetic solenoid 14, it has the advantage of being smaller in size than the conventional one in which two independent valve mechanisms are provided. Moreover, since the valve end is not on the pedestal or the cylinder but on the displacer 7 as a movable part, it has the characteristic that vibrations at the time of valve closing are not directly transmitted to external pressure.

A further significant feature of the present invention, which is common to the embodiments shown in FIGS. The pressure receiving area is made almost equal to the pressure receiving area due to the diameter of the upper part 12, and at the same time, high pressure and low pressure act on each pressure receiving part, and the intermediate pressure between the suction and discharge pressure of the Habo compressor acts on the entire diameter reduction group. Focus on what you are doing. Therefore, when the pressure in the chambers 21, 22, 23 is high, there is an upward force, and when the pressure is low, there is a downward force. Furthermore, since the structure is such that the supply and discharge valve holes to the regenerator are provided directly from the space where each gas pressure is applied, the overall structure of the refrigerator is significantly simplified and the number of component parts is reduced. Therefore, reliability can be improved.

Further, since the valve body 31 and the plunger 34 are connected via the ball 36, the seating property is improved, and a stable valve action can always be obtained regardless of the posture of the plunger 34.

[Brief explanation of drawings]

FIG. 1 is a sectional view of one embodiment of the present invention. FIG. 2 is a sectional view of another embodiment of the invention. 1... Refrigeration device 2, 3... Cylinder 4...
・Case 7...Displacer 13...
・Valve mechanism 14...Electromagnetic lens 16...
・Suction hole 18...Discharge hole 19.20...Regenerator 21.22.23...Chamber 61...Valve body
33...Pole 34...Plunger
36...Coil 41 Diagram■ 1 original loss - within 2 years

Claims (1)

[Claims] (1) An electromagnetic solenoid and a valve mechanism for supplying compressed high-pressure gas to an expander in a reciprocating refrigerator using a regenerator and discharging the expanded low-pressure gas are provided by an electromagnetic solenoid and the electromagnetic solenoid. a driven plunger, the electromagnetic solenoid of the valve mechanism is connected to the hot end of the reciprocating displacer, one end of the plunger is used as a low pressure gas discharge valve, and the discharge valve is connected to the electromagnetic solenoid. A refrigeration system characterized in that a high-pressure gas suction valve provided at an end of the discharge valve opens when pushed by electromagnetic force. (2. In the refrigeration apparatus according to claim 1,
A refrigeration system characterized in that only a coil of an electromagnetic solenoid part of a valve mechanism is fixed to a pedestal, and the length of the coil is made longer than at least a stroke of a reciprocating displacer. (3) In the refrigeration apparatus according to claim 1,
A refrigeration device characterized in that a valve body of a low-pressure gas discharge valve is formed of a ball. (4) A valve mechanism for supplying compressed high-pressure gas to an expander in a reciprocating refrigerator using a regenerator and discharging the expanded low-pressure gas is formed by a plunger driven by an electromagnetic solenoid. The solenoid of the valve mechanism is connected to the hot end of the reciprocating displacer, and one end of the plunger is used as a low-pressure gas discharge valve, and when the discharge valve is pushed by the electromagnetic force of the solenoid, The high-pressure gas suction valve provided at the end of the discharge valve is opened, and the upper part of the displacer is reduced in diameter, and the upper part of the reduced diameter part is made smaller in diameter, and the reduced diameter part and the upper part are A refrigeration system characterized in that a pressure receiving area due to a dimensional difference is set to be approximately equal to a pressure receiving area due to a diameter dimension of an upper portion.