JPH043857A - Thermodynamic reciprocating type freezer - Google Patents

Abstract

PURPOSE:To increase a degree of freedom in mounting and perform a smooth driving of a displacing piston by a method wherein a displacing device cylinder and a power cylinder are separately disposed and at the same time a connecting means for connecting the displacing piston with a driving source are formed by a flexible member. CONSTITUTION:A flexible connecting wire 14 is formed by a bundle of several steel wires or a flexible resin rod. One end of the wire is connected to a bottom part of a displacing piston 4 and the other end of the wire is connected to a crank mechanism 6 through a guide rod 12 and a displacing piston rod 16. The connecting wire 14 is disposed in a flexible wire holding pipe 17 and is connected to a power cylinder 1 and a displacing device cylinder 2. The power cylinder 1 and the displacing device cylinder 2 are separately disposed, and the displacing device cylinder 2 and a canned motor 5 are connected by the flexible connecting wire 14, so that the displacing device cylinder 2 can be disposed at any position.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention is directed to a refrigerator that does not use fluorocarbon gas, namely a Stirling cycle refrigerator or a Vullieu refrigerator.
This invention relates to a thermodynamic reciprocating refrigerator used as a cycle refrigerator.

(Prior art) Stirling engines have been known that utilize a Stirling cycle consisting of two isothermal changes and two isovolume changes in the gas cycle, and when this Stirling cycle is reversed, the Stirling cycle It becomes a refrigerator.

This type of Stirling cycle refrigerator consists of a displacer cylinder in which a displacer piston is reciprocably housed, a power cylinder in which a power piston is housed in a reciprocating manner, and each cylinder is connected to the displacer cylinder and the power cylinder. The displacer piston and the power piston are provided with a gas flow pipe that allows working gas to flow therebetween, and a motor that drives the displacer piston and the power piston with a predetermined phase difference through separate connection means that connect the displacer piston and the power piston to the crank mechanism,
The drive of the motor produces heat absorption on the displacer cylinder side.

In this way, in a Stirling cycle refrigerator, the displacer piston and the power piston create isothermal and equal volume of the working gas, but the Villeumier system uses two displacer pistons to create this change in the working gas. It is a cycle refrigerator.

This Villeumier cycle refrigerator includes a first displacer cylinder in which a first displacer piston is reciprocatably housed, a second displacer cylinder in which a second displacer piston is reciprocatably housed,
Each displacer cylinder is driven with a predetermined phase difference through a gas flow pipe that communicates with each other and allows working gas to flow between each displacer cylinder, and a separate connecting means that connects each displacer piston to the crank mechanism. The displacer cylinder is provided with a drive means to generate an endothermic action on each displacer cylinder side by driving the drive means.

In addition, in a Stirling cycle compact crankless ultra-low temperature refrigerator, an intermediate pressure chamber is placed at the rear of the displacer piston isolated from the crank, and the displacer piston is moved only by the pressure rise and fall of the working gas generated by the crank-driven power piston. There is something that moves back and forth.

(Problem to be Solved by the Invention) However, in either of the first two refrigerators, the connecting means for transmitting the rotational force of the motor to each piston is a rigid rod connected to the crank mechanism. Because of this structure, there are restrictions on the position and orientation of the displacer cylinder that produces heat absorption, that is, cooling effect, and there is a problem in that the displacer cylinder cannot be installed arbitrarily in relation to the part to be cooled. Ta.

In addition, in Vuilleumier cycle refrigerators, one displacer piston and cylinder may be large in order to create pressure fluctuations in the working gas, but in such cases, the displacer piston and cylinder are If there is an error between the direction of the force applied to the cylinder and the direction in which the cylinder is installed, the frictional vibrations generated therebetween become significantly large, resulting in a problem in that the performance cannot be fully demonstrated.

Furthermore, in the case of the latter small crankless ultra-low temperature refrigerator,
Although its structure is extremely simple, it requires a seal ring on the displacer piston, which has the disadvantage of causing an excessive phase delay in movement and producing impact noise.

SUMMARY OF THE INVENTION In view of the above-mentioned conventional problems, an object of the present invention is to enable a displacer cylinder that produces a cooling effect to be placed in an arbitrary position and posture, and to control the reciprocating movement of a displacer piston.
It is an object of the present invention to provide a thermodynamic reciprocating refrigerator that can operate smoothly and quietly while maintaining accurate phase motion.

(Means for Solving the Problems) In order to solve the above problems, the invention of claim (1) provides a displacer cylinder in which a displacer piston is housed in a reciprocating manner, and a power piston in which a power piston is reciprocably housed. a power cylinder housed in the displacer cylinder, a gas flow pipe that communicates with the displacer cylinder and the power cylinder and allows working gas to flow between the cylinders, and a gas flow pipe that connects the displacer piston and the power piston to a crank mechanism. A thermodynamic reciprocating refrigerator is provided with a drive means that is driven with a predetermined phase difference through a separate connection means, and which produces an endothermic action on the displacer cylinder side by driving the drive means. The invention of claim (2) is characterized in that the power cylinder is provided separately, and a connecting means for connecting the displacer piston and the drive source is formed of a flexible member. a first displacer cylinder in which a piston is reciprocably housed; a second displacer cylinder in which a second displacer piston is accommodated in a reciprocating manner; and the displacer cylinders communicate with each other to communicate with each other. A gas flow pipe that allows working gas to flow between the cylinders, and a drive means that drives each displacer piston with a predetermined phase difference through separate connection means that connect each displacer piston to a crank mechanism, and drives the drive means. In the thermodynamic reciprocating refrigerator which generates an endothermic action on the side of each displacer cylinder, each of the displacer cylinders is provided separately, and at least a connecting means for connecting each of the displacer pistons and the drive source is provided. The invention of claim (3), characterized in that one of the members is made of a flexible member, is based on claim (1) or claim (2).
), the thermodynamic reciprocating refrigerator is characterized in that a connecting means formed of a flexible member is disposed within the gas flow pipe.

(Function) According to the invention of claim (1), the displacer cylinder and the power cylinder are provided separately, and the connecting means for connecting the displacer piston and the drive source is formed of a flexible member. A displacer cylinder having an endothermic or cooling effect can be arranged in a cooled part remote from the drive source. Further, even if there is an error between the direction of the force applied to the displacer piston via the connecting member and the installation direction of the cylinder, this error is absorbed by the connecting member.

According to the invention of claim (2), since each displacer cylinder is provided separately and at least one of the connecting means for connecting each displacer piston and the drive source is formed of a flexible member, the flexible Similarly to the invention of claim (1), the displacer piston connected to the coupling means can be placed in a cooled part isolated from the drive source, and the error that occurs between the displacer piston and the cylinder can also be avoided. It is absorbed by this connecting member.

According to the invention of claim (3), since the connecting means made of a flexible member is disposed within the gas flow pipe, the space peculiar to this connecting means is not required.

(Embodiment) FIG. 1 shows an example in which a thermodynamic reciprocating refrigerator, for example, a Starlinda cycle refrigerator, according to the present invention is used in an infrared sensor device.

In the figure, 1 is a power cylinder and 2 is a display surge cylinder. A power piston 3 is housed within the power cylinder 1 so as to be able to freely reciprocate, and a displacer piston 4 is housed within the displacer cylinder 2 so that it can freely reciprocate. A crank mechanism 6 connected to a canned motor 5 is disposed within the power cylinder 1, and a power piston rod 7 connected to the crank mechanism 6 causes the power piston 3 to reciprocate up and down. Further, the displacer piston 4 is provided with a regenerative heat exchanger 8 inside thereof, and via the regenerative heat exchanger 8, a heat absorption space 9 on the head side of the displacer cylinder 2 and a heat radiation space 1 on the bottom side.
It communicates with 0.

Furthermore, a heat absorption space 9 on the outer peripheral surface of the displacer cylinder 2
A heat absorbing fin 11 is provided protruding from the side, and a heat radiating fin 12 is provided protruding from the heat radiating space 10 side.

Reference numeral 13 denotes a gas flow pipe made of flexible resin, which communicates with the head side of the power cylinder 1 and the heat radiation space 10 of the displacer cylinder 2, through which the working gas sealed between each cylinder 1.2 flows. It looks like this.

Reference numeral 14 denotes a flexible connecting wire, which is made of a bundle of many steel wires or a flexible resin rod. One end of this connecting wire 14 is connected to the bottom of the displacer piston 4, and the other end is connected to the crank mechanism 6 via a guide rod 15 and a displacer piston rod 16. is displacer cylinder 2
move back and forth within. Further, this connecting wire 14 is disposed within a flexible wire holding tube 17, and this wire holding tube 17
is connected to the power cylinder 1 and the displacer cylinder 2. In addition, the power piston 3 and the displacer piston 4 are reciprocated by the canned motor 5, as shown in FIG. However, the phase difference between the pistons 3 and 4 is set to form a reverse Stirling cycle. That is, power piston 3
Working gas flows through the regenerative heat exchanger 8 due to pressure fluctuations caused by the reciprocating motion of It is designed to emit heat.

Reference numeral 19 denotes an infrared sensor device, and a gallium arsenide infrared sensor 21 is attached to one side of the heat insulating chamber 20.

Further, a heat absorbing portion of the displacer piston 4 is arranged within the heat insulating chamber 20.

According to this embodiment, the power piston 3 reciprocates through the crank mechanism 6 and the power piston rod 7 by driving the canned motor 5, fluctuates the pressure of the working gas, and converts the working gas into regenerated heat from the displacer piston 4. Exchanger 8
circulate within. On the other hand, the driving force of this canned motor 5 is transmitted to the crank mechanism 6 and the displacer piston rod 1.
6. It is transmitted to the displacer piston 4 via the guide rod 15 and the connecting wire 14, causing the displacer piston 4 to reciprocate.

The working gas flows into the regenerative heat exchanger 8 and the heat absorption space 9 and heat radiation space l of the displacer piston 4.
By reciprocating to O, the adiabatic space within the infrared sensor device 19 is cooled, and furthermore, the heat within the adiabatic space is released to the outside.

Also, power cylinder 1 and displacer cylinder 2
are arranged separately, and the displacer cylinder 2 and the canned motor 5 are connected by a flexible connecting wire 14.
can be installed at any position. Furthermore, the difference between the installation direction of the displacer cylinder 2 and the driving direction of the displacer piston 4 is caused by the flexible connection wire 14.
This allows the displacer piston 4 to reciprocate smoothly.

FIG. 2 shows an example in which a Starlinda cycle refrigerator is used in a refrigerator. In the figure, 30 is a power cylinder,
31 is a displacer cylinder. Each cylinder 3
0.31 respectively house a power piston 32 and a displacer 33 so as to be able to reciprocate. The power piston 32 is connected to a crank mechanism 35 via a power piston rod 34, and reciprocated by a canned motor 36 connected to the crank mechanism 35. On the other hand, the displacer piston 33 has a regenerative heat exchanger 37 therein.
and is connected to the crank mechanism 35 via a flexible connecting wire 38, a guide rod 39, and a displacer piston rod 40, thereby creating a heat absorption space 41 and a heat radiation space 4 in the displacer cylinder 31.
2 to reciprocate. Incidentally, the phase difference between each piston 32 and 33 is set to constitute a reverse Stirling cycle.

43 is a flexible wire holding tube surrounding the connecting wire 38, one end of which is passed through the head side of the power cylinder 30, the other end is passed through the bottom of the displacer cylinder 31, and both ends are inserted through a spacer 44. each cylinder 30
．． It is fixed at 31.

45 is a flexible gas flow tube that covers the wire holding tube 43 at a predetermined interval and connects each end to the power cylinder 30.
The head side of the displacer cylinder 31 is connected to the bottom of the displacer cylinder 31.

Reference numeral 46 denotes an adiabatic refrigerator, which has a base 47 and a cylindrical body 48 detachably installed on the base 47. The displacer cylinder 31 is removably attached to the upper opening of the cylindrical body 48 via a seal member 49, and the heat absorption space 41 side of the displacer cylinder 31 is connected to the cylindrical body 48.
It is located inside.

According to this embodiment, the power piston 32 and the displacer piston 33 are driven by the canned motor 36.
is driven, and the interior of the refrigerator 46 is cooled by a reverse Stirling cycle. Also, since the connecting wire 38 is flexible, the displacer piston 33 operates smoothly. Furthermore, since the connecting wire 38 is disposed within the gas distribution pipe 45, this gas distribution pipe 45 also serves as a space for arranging the connecting wire 38, and no space for arranging the connecting wire 38 is required.

FIG. 3 shows an example in which the Vuilleumier cycle refrigerator is used as a cooling system for a vehicle. In the figure, 50a, 50
b are first and second displacer cylinders, 51a;
51b is a displacer piston housed in each displacer cylinder 50a, 50b so as to be able to reciprocate. This first displacer piston 51a includes a guide rod 52a and a displacer piston rod 5.
It is connected to a crank mechanism 54 via 3a. On the other hand,
The second displacer piston 51b is connected to the crank mechanism 54 via a flexible connecting wire 55, a guide rod 52b, and a displacer piston rod 53b.

The displacer pistons 51a, 51b are driven by a canned motor 56 to reciprocate between heat absorption spaces 57a, 57b and heat radiation spaces 58a, 58b within each displacer cylinder 50a, 50b. In addition, a regenerative heat exchanger 59a is installed in each displacer piston 51a, 51b.
, 59b are provided, and each space 57a, 57b, 58a, 58
The working gas in b flows through each regenerative heat exchanger 59a, 59b. Further, the heat absorption space 57a side of the first displacer cylinder 50a is arranged in the air conditioning passage A of the vehicle, and the heat absorption space 57b side of the second displacer cylinder 50b is arranged in the exhaust gas passage B of the engine. On the other hand, each displacer cylinder 50a,
The heat radiation spaces 58a and 58b side of 50b is located in the cooling water channel 60. Further, a gas flow pipe 61 is arranged within the cooling water channel 60 and communicates between each of the heat radiation spaces 58a and 58b.

In addition, 62 is a flexible wire holding tube that covers the connecting wire 55, and is a flexible wire holding tube that covers the heat radiation space 5 of the second displacer cylinder 50b.
8b and the crank chamber of the crank mechanism 54.

A sealing member 63 prevents working gas from entering the wire holding tube 62 and the crank chamber.

According to this embodiment, the second displacer piston 51b reciprocates between the heat absorption space 57b and the heat radiation space 58b via the connection wire 55 and the like by driving the canned motor 56. At this time, the heat absorption space 57b is heated by the exhaust gas and the working gas expands, while the heat of the working gas is radiated into the cooling water tank 60 in the heat radiation space 58b and contracts. This expansion and contraction of the working gas causes pressure fluctuations in the working gas. That is, this second displacer piston 51b has a function as a power piston of the Stirling cycle refrigerator.

On the other hand, by driving the canned motor 56, the first displacer piston 51a also moves into the heat absorption space 57a and the heat radiation space 58.
It moves back and forth between a and a. Due to the reciprocating movement of the first displacer piston 51a and the pressure fluctuation of the working gas,
The air conditioning air in the air conditioning passage A is cooled, and the heat of this air conditioning air is radiated into the cooling water tank 60.

In this way, the vehicle is cooled by the Vuilleumier cycle refrigerator according to the present embodiment, and since the connecting means of the second displacer piston 51b is constituted by the flexible connecting wire 55, the above-mentioned Like the Stirling cycle refrigerator of each embodiment, this second displacer piston 51b operates smoothly.

(Effects of the Invention) As explained above, according to the invention of claims (1) and (2), the displacer piston connected to the connecting means formed of a flexible member and the display housing the displacer piston are provided. Since the sur cylinder can be installed in any position, the degree of installation freedom is increased.
It also has the advantage that this displacer piston drives smoothly.

According to the invention of claim (3), since the connecting means made of a flexible member is disposed within the gas flow pipe, there is an advantage that the space peculiar to this connecting means is not required.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an example of a Stirling cycle refrigerator, FIG. 2 is a sectional view showing another example of a Stirling cycle refrigerator, and FIG. 3 is a sectional view showing an example of a Vuilleumier cycle refrigerator. In the figure, 1.30...power cylinder, 2,31°50
a, 50b...Displacer cylinder, 3゜32
...Power piston, 4.33.51a, 51b...
・Displacer piston, 5, 36.56°...
Canned motor, 6.35.54...crank mechanism,
13,45.61...Gas distribution pipe, 14.38°55
...Connection wire. Patent applicant Sanden Co., Ltd. (and 1 other person) Agent Patent attorney Yoshi 1) Power piston displacer - piston crank mechanism Canned motor Main cause Cooling chamber Cross-sectional diagram showing an example of a Yumi cycle refrigerator Tube 3
figure

Claims (3)

[Claims] (1) A displacer cylinder in which a displacer piston is reciprocably housed, a power cylinder in which a power piston is housed in a reciprocating manner, and the displacer cylinder communicates with the power cylinder and operates between the cylinders. A gas flow pipe through which gas flows, and a driving means for driving the displacer piston and the power piston with a predetermined phase difference through separate connecting means for connecting the displacer piston and the power piston to a crank mechanism, the driving means for driving the driving means. In a thermodynamic reciprocating refrigerator that produces an endothermic action on the displacer cylinder side, the displacer cylinder and the power cylinder are provided separately, and a connecting means is provided for connecting the displacer piston and the drive source. A thermodynamic reciprocating refrigerator characterized in that it is formed of a flexible member. (2) A first displacer cylinder in which the first displacer piston is reciprocably housed, a second displacer cylinder in which the second displacer piston is reciprocably housed, and mutual interaction between the respective displacer cylinders. a gas flow pipe that communicates with the displacer cylinders and allows working gas to flow between the displacer cylinders; and a drive means that drives the displacer pistons with a predetermined phase difference through separate coupling means that couple the displacer pistons to the crank mechanism. A thermodynamic reciprocating refrigerator is provided, in which each of the displacer cylinders is separately provided, and each of the displacer pistons and the drive source are connected to each other, A thermodynamic reciprocating refrigerator characterized in that at least one of the connecting means is made of a flexible member. (3) The thermodynamic reciprocating refrigerator according to claim (1) or claim (2), characterized in that a connecting means formed of a flexible member is disposed within the gas flow pipe.