JPH10288413A - Refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance radiation from a high temperature part to lower temperature in a case and a refrigerator and make it possible to make the refrigerator compact by bringing at least part of a high temperature part of the refrigerator into at least one face of a case in an air cooled type refrigerator comprising a compressor part, a refrigerator part and an expansion part. SOLUTION: A reverse Stirling refrigerating machine or the like comprises a horizontally installed compressor part 11 and a refrigerator part 12 provided with a vertically installed vacuum heat insulated tank 120. In this case, radiator fins 15 consisting of thin annular fins spaced apart at a regular interval are integrally formed on an outer peripheral wall of a hollow circular cylindrical body in which a compressor piston of the compressor part reciprocates. In a direction of a case 13 vertical to an axis of the compressor part 11 an air inlet and an air outlet are formed in opposing walls in an opposing relation to each other and an air cooling fan 14 are installed in a vicinity of the air inlet in the case 13. Outer air taken in by the air cooling fan 14 is brought into contact with the radiator fins 15 to deprive the refrigerator of heat.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a refrigeration system such as an air-cooled reverse Stirling refrigerator or a pulse tube refrigerator comprising a compression section, a refrigeration section and an expansion section. The present invention relates to a refrigeration apparatus in which a part is brought into contact with a bottom surface of a case and heat radiation of the refrigeration apparatus is promoted using the case.

[0002]

2. Description of the Related Art As shown in FIGS. 7 to 9, a conventional refrigeration apparatus incorporates a cryogenic refrigerator such as an inverse Stirling refrigerator or a pulse tube refrigerator in a case 3 and uses it in air cooling. A projection 5 as a cooling radiator fin is attached around the refrigerator, and an air flow path 6 is formed so as to cover the periphery of the projection, and air is flowed therethrough to cool the refrigerator.

That is, the conventional refrigeration system comprises a compression unit 1 and a refrigeration unit 2 provided with a vacuum heat insulating tank, a radiation fin 5 is disposed on a side wall, and an air inlet 7 and an air outlet 8 are formed. Placed in the case, and provided with an air-cooling fan 4 to allow air taken in from the air inlet 7 to
An air passage 6 formed between the case 3 and the refrigerating device
To cool the refrigerating apparatus and discharge the air from the air outlet 8.

In addition, as shown in FIG. 9, the refrigerating apparatus is fixed to the bottom surface 31 of the case 3 at four points by an L-shaped bracket 9 in a point contact manner.

[0005]

In the above-mentioned conventional refrigeration apparatus, the air passage 6 formed between the case 3 and the refrigeration apparatus by the air taken in from the air inlet 7 by the air cooling fan 4. Since the refrigerating device is cooled through the air outlet and is discharged from the air outlet 8, there is a problem that the air flow path 6 needs to be formed and the size becomes large.

Further, the conventional refrigeration apparatus is partially fixed to the bottom surface 31 of the case 3 at four points in a point-contact manner by an L-shaped bracket 9 as shown in FIG. However, since the heat of the refrigerating device cannot be sufficiently transmitted to the case 3, the temperature inside the case 3 increases, so that there is a problem that heat radiation deteriorates.

Accordingly, the present inventors have paid attention to the fact that the heat of the refrigerating apparatus is transmitted to the case and heat is radiated using the case having a large surface area. In the refrigeration apparatus, focusing on the technical idea of the present invention that at least a part of the lower surface of the high-temperature section of the refrigeration apparatus is brought into contact with the bottom of the case, and as a result of further research and development, the heat of the high-temperature section of the refrigeration apparatus is reduced. By effectively dissipating heat,
The present invention has been made to achieve the object of promoting the heat radiation and lowering the temperature of the inside of the case and the refrigeration apparatus and enabling the miniaturization of the apparatus.

[0008]

According to a first aspect of the present invention, there is provided an air-cooled type refrigeration apparatus comprising a compression section, a refrigeration section and an expansion section. A part of the flat part of the part is brought into contact with at least one surface of the case.

A refrigeration apparatus according to the present invention (the second invention according to the second aspect) is the refrigeration apparatus according to the first aspect, wherein at least a part of the lower surface of the compression section is brought into contact with the bottom surface of the case.

A refrigeration apparatus according to the present invention (a third invention according to claim 3) is the refrigeration apparatus according to the second invention, wherein a part of a lower surface of the refrigeration section is brought into contact with a case bottom.

[0011] In the refrigeration apparatus according to the present invention (fourth aspect of the present invention), in the first aspect, an area portion of a lower surface of the high-temperature portion having a predetermined ratio or more is brought into contact with a case bottom surface. .

A refrigeration apparatus according to the present invention (fifth invention according to claim 5) is the refrigeration apparatus according to the first invention, wherein a heat conductive sheet is provided between a part of a lower surface of the high temperature portion of the refrigeration apparatus and the bottom of the case. Is interposed.

[0013] In the refrigeration apparatus of the present invention (a sixth invention according to claim 6), in the first invention, the side wall surface of the high-temperature portion of the refrigeration apparatus is brought into contact with the inner wall surface of the case. The heat radiation fins are disposed on the outer wall surface of the radiator.

A refrigeration apparatus according to the present invention (a seventh invention according to claim 7) is the refrigeration apparatus according to the first invention, wherein a radiation fin is formed on an outer wall of the high-temperature portion of the refrigeration apparatus.

According to a refrigeration apparatus of the present invention (an eighth aspect of the present invention), in the first aspect, an air inlet and an air outlet are formed in the case.

A refrigeration apparatus according to the present invention (a ninth aspect of the present invention) is the refrigeration apparatus according to the eighth aspect, wherein an air cooling fan is provided in the case.

[0017]

In the refrigeration apparatus according to the first aspect of the present invention, at least a part of the flat portion of the high-temperature portion of the refrigeration device is brought into contact with at least one surface of the case. By dissipating heat effectively,
The heat radiation is promoted to lower the temperature inside the case and the refrigerating device, and the size of the device can be reduced.

[0018] The refrigeration apparatus of the second invention having the above-described structure,
In the first invention, since a part of the lower surface of the compression section, which is a high-temperature section, is brought into contact with the bottom of the case, the heat of the high-temperature section of the compression section is effectively radiated, so that heat dissipation is promoted and the case is improved. This has the effect of reducing the temperatures of the inside and the refrigeration system.

The refrigeration apparatus of the third invention having the above-described structure,
In the second invention, since a part of the lower surface of the freezing portion, which is a high-temperature portion, is also brought into contact with the case bottom surface, the heat of the high-temperature portion of the freezing portion is also effectively dissipated, thereby further promoting heat dissipation. This has the effect of further reducing the temperature inside the case and the refrigeration device.

[0020] The refrigeration apparatus of the fourth invention having the above structure is
In the first invention, an area of a predetermined percentage or more of the lower surface of the high-temperature section is brought into contact with the bottom of the case. This has the effect of promoting the temperature of the inside of the case and the refrigeration device to be reliably reduced.

[0021] The refrigeration apparatus of the fifth invention having the above-described structure,
In the first invention, since the heat conductive sheet is interposed between a part of the lower surface of the high temperature portion of the refrigeration device and the bottom surface of the case, the heat of the high temperature portion of the refrigeration device can be more effectively used. This has the effect that it can be transmitted to the case.

[0022] The refrigeration apparatus of the sixth invention having the above-described structure,
In the first invention, since the side wall surface of the high-temperature portion of the refrigerating device is also in contact with the inner wall surface of the case, heat is also transmitted from the side wall surface of the high-temperature portion to the inner wall surface of the case, and a large amount of heat is transferred. Since heat is radiated by the radiating fins disposed on the outer wall surface of the case to which the heat has been transmitted, there is an effect that heat transmitted from the high temperature portion of the refrigeration apparatus to the case can be effectively radiated. .

[0023] The refrigeration apparatus of the seventh invention having the above-described structure,
In the first invention, the heat radiation fins formed on the outer wall of the high temperature section of the refrigerating apparatus have an effect that heat of the high temperature section of the refrigerating apparatus can be effectively radiated.

[0024] The refrigeration apparatus of the eighth invention having the above-described structure,
In the seventh aspect, since the air inlet and the air outlet are formed in the case, air is taken into the case from the air inlet, and the temperature of the air whose temperature rises from the refrigeration apparatus and the radiation fins is increased. Is discharged from the air outlet, so that the heat of the high-temperature portion of the refrigerating device can be radiated.

The refrigeration apparatus according to the ninth invention having the above-described structure,
In the eighth aspect, the air-cooling fan disposed in the case rotates to form a forced flow in the case, to take in air into the case from the air inlet, Since the air whose temperature has risen from the heat radiation fins is discharged from the air outlet, the heat of the high temperature portion of the refrigeration device can be more effectively radiated.

[0026]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention are described below.
This will be described with reference to the drawings.

(First Embodiment) As shown in FIGS. 1 and 2, the refrigeration apparatus of the first embodiment is an air-cooled refrigeration apparatus comprising a compression section 11, a refrigeration section 12, and an expansion section. The lower surface 19 of the compression unit 11, which is a high-temperature portion of the device
Are brought into contact with the bottom surface 131 of the case 13.

The refrigerating apparatus according to the first embodiment is constituted by, for example, an integrated pulse tube refrigerating machine or an inverse Stirling refrigerating machine. As shown in FIGS. , A vertically installed vacuum insulation tank 1
And a refrigeration unit 12 provided with the same 20 and is formed in a substantially inverted T-shape.

The compression section 11 is constituted by a hollow cylinder in which a compression piston (not shown) is inserted, and a compression space (not shown) in which the compression piston 1 reciprocates is formed therein. The radiation fins 15 are formed integrally with thin annular fins arranged side by side at regular intervals on the outer peripheral wall.

The lower surface 19 at the center of the compression portion 11 is made flat, and a part of the lower surface 19 is
Are fixed by bolts or other fixing means in a state of surface contact.

A part of the flat surface, that is, an area sufficient to transmit heat of the high temperature part of the refrigerating device to the case, and a certain ratio (25%) of the projected area of the compression part 11
%) Is desirable. In the first embodiment, an area corresponding to 46% is set as an example. If more area than necessary is brought into contact, more heat transfer than necessary is obtained, and the refrigeration function of the refrigeration system is reduced, which is undesirable.

Side walls 132 and 13 of the case 13 facing each other in a direction perpendicular to the axial direction of the compression portion 11
3, an air inlet 17 and an air outlet 18 are formed to face each other.

In the case 13, an axial type air-cooling fan 14 that is rotated and driven by a motor or the like is provided in proximity to the air inlet 17, and the air-cooling fan 14 is rotated so that the air-cooling fan 14 rotates from the air inlet 17. Intake outside air, and the outer surface of the refrigeration system and the radiating fins 1
5, the refrigerating device is configured to generate a forced flow for discharging air from the refrigerating device, the temperature of which has risen and the temperature of which rises from the air outlet 18.

In the refrigerating apparatus according to the first embodiment, a part of the flat surface 19 on the lower surface at the center of the compression part 11 is in surface contact with the bottom surface 131 of the case 13. The heat of the high temperature portion is transmitted to the case 13 via the contact portion 19 between the lower surface of the compression portion 11 and the bottom surface 131 of the case 13.

When the air-cooling fan disposed near the air inlet 17 rotates in the case 13, a forced flow is formed in the case 13, and outside air is taken in from the air inlet 17. The air whose temperature has risen due to heat from the refrigerating device is discharged from the air outlet 18 by contacting the outer surface of the refrigerating device and the radiation fins 15.

The refrigeration system of the first embodiment having the above-described operation is characterized in that at least the compression unit 11 which is a high-temperature portion of the refrigeration system.
In addition, since a part of the lower surface of the freezing unit 12 is in contact with the bottom surface 131 of the case 13, the heat of the high-temperature portion of the freezing device is effectively radiated, thereby promoting the heat radiation and freezing the inside of the case and freezing. This has the effect of lowering the temperature of the device and enabling downsizing of the device.

In the refrigerating apparatus according to the first embodiment, an area of a predetermined ratio or more of the projected area of the compression section 11 constituting the high-temperature section is brought into contact with the bottom surface 131 of the case 13. This has the effect of effectively dissipating more than a certain amount of heat in the high-temperature portion of the device, thereby lowering the temperature of the high-temperature portion of the refrigeration device.

Further, in the refrigeration apparatus of the first embodiment, the heat of the high-temperature section of the refrigeration apparatus can be effectively radiated by the radiation fins 15 formed on the outer wall of the high-temperature section of the refrigeration apparatus. This has the effect.

In the refrigeration apparatus of the first embodiment, the air cooling fan 14 disposed in the case 13 rotates to form a forced flow in the case 13, and the forced air flows through the air inlet 17. Take air into case 13,
The air whose temperature has risen from the refrigeration apparatus and the radiating fins 15 is discharged from the air outlet 18, so that the heat of the high temperature portion of the refrigeration apparatus can be more effectively radiated. .

(Second Embodiment) As shown in FIGS. 3 and 4, the refrigeration apparatus of the second embodiment includes a part of the lower surface of the high-temperature portion of the refrigeration apparatus of the first embodiment and the case. 13, a heat conductive sheet 20 made of a flexible sheet or grease such as a silicon rubber sheet or an indium sheet, and adapted to conform to the unevenness of the contact surface and increase the contact surface area. Only the difference is that the other configuration is the same.

In the refrigeration apparatus of the second embodiment having the above structure, the heat conductive sheet 20 interposed between a part of the lower surface of the high temperature portion of the refrigeration apparatus and the bottom surface 131 of the case 13 is The heat of the high temperature section of the refrigeration device is transmitted to the case.

In the refrigeration apparatus according to the second embodiment having the above-described operation, the heat conductive sheet 20 effectively transfers the heat of the high-temperature portion of the refrigeration apparatus to the case 13 to radiate heat. The heat of the high temperature part is more effectively radiated, and the temperature of the high temperature part of the refrigerating device is effectively lowered.

(Third Embodiment) In the refrigerating apparatus of the third embodiment, as shown in FIGS. 5 and 6, the side wall surface of the high-temperature portion of the refrigerating apparatus is also brought into contact with the inner wall surfaces 134 and 135 of the case 13. The difference is that the heat radiation fins 43 are provided on the outer wall surface 136 of the case 13, and the other configurations are the same.

That is, the lower surface and both side surfaces 40 and 41 of the compression portion 31 which is a high temperature portion of the refrigerating device are connected to the case 1.
3 and the flange 42, which is a high-temperature portion of the freezing portion 32, is also in contact with the case 13.
Is brought into contact with the inner wall surface 134 of the main body.

Both sides 4 of the compression section 31 of the refrigeration system
The heat radiating fins 43 are disposed on both outer wall surfaces 136 of the case 13 on the opposite side of the inner wall surface 134 of the case 13 contacting the fin 43.

In the refrigeration apparatus of the third embodiment having the above-described structure, the side wall surfaces of the flange section 42 of the compression section 31 and the refrigeration section 32, which are the high-temperature sections of the refrigeration apparatus, also have the inner wall surface 134 of the case 13, Because it is in contact with 135,
Heat is also transmitted from the side wall surface of the high temperature portion to the inner wall surface of the case, and the heat is radiated by the radiation fins 43 disposed on the outer wall surface 134 of the case 13 to which a large amount of heat has been transmitted.

The refrigeration apparatus according to the third embodiment having the above-described operation is arranged such that, in addition to the bottom surface of the compression section 31, both side walls 40 and 41 of the compression section 31 and the flange section 42 of the refrigeration section 32.
Are also in contact with the inner wall surfaces 134 and 135 of the case 13, so that a large amount of heat can be transmitted to the case 13, and the transmitted large amount of heat can be transmitted to the outer wall surface 136 of the case 13. Since the heat is dissipated by the radiation fins 43 provided in the refrigerator, the heat transmitted from the high-temperature portion of the refrigerating device to the case 13 can be effectively dissipated, and the temperature of the high-temperature portion of the refrigerating device can be reduced. The effect that it can lower is produced.

The refrigeration apparatus of the third embodiment does not require an air-cooling fan rotated and driven by a motor or the like as in the above-described embodiment, and thus has the advantages of a simple structure and no maintenance or the like. .

The above-described embodiments have been described by way of example only, and the present invention is not limited to these embodiments. Those skilled in the art will recognize from the claims, the detailed description of the invention, and the drawings. Modifications and additions are possible without departing from the technical idea of the present invention.

In the above-described embodiment, an example in which the bottom surface of the high-temperature portion of the refrigerating apparatus is brought into contact with the bottom surface of the case has been described as an example. However, the present invention is not limited thereto. , The upper surface and the like can be brought into contact with the case.

[Brief description of the drawings]

FIG. 1 is a front view showing a refrigeration apparatus according to a first embodiment of the present invention.

FIG. 2 is a side view showing the refrigeration apparatus of the first embodiment.

FIG. 3 is a front view showing a refrigeration apparatus according to a second embodiment of the present invention.

FIG. 4 is a side view showing a refrigeration apparatus of the second embodiment.

FIG. 5 is a plan view showing a refrigeration apparatus according to a third embodiment of the present invention.

FIG. 6 is a side view showing a refrigeration apparatus according to the third embodiment.

FIG. 7 is a front view showing a conventional refrigeration apparatus.

FIG. 8 is a side view showing a conventional refrigeration apparatus.

FIG. 9 is a partially enlarged view showing a structure for attaching a conventional refrigeration apparatus to a case.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Compression part 12 Freezing part 13 Case 19 Lower surface 131 Bottom surface

Claims (9)

[Claims] 1. An air-cooled refrigeration apparatus comprising a compression section, a refrigeration section and an expansion section, wherein at least a part of a flat portion of a high-temperature section of the refrigeration apparatus is brought into contact with at least one surface of a case. apparatus. 2. The refrigeration apparatus according to claim 1, wherein at least a part of a lower surface of the compression section is in contact with a bottom surface of the case. 3. The refrigeration apparatus according to claim 2, wherein a part of a lower surface of the refrigeration unit is in contact with a bottom surface of the case. 4. The refrigeration apparatus according to claim 1, wherein an area of a predetermined ratio or more of a lower surface of the high-temperature portion is brought into contact with a bottom surface of the case. 5. The refrigeration apparatus according to claim 1, wherein a heat conductive sheet is interposed between a part of a lower surface of the high temperature section of the refrigeration apparatus and the bottom of the case. 6. The refrigeration apparatus according to claim 1, wherein a side wall surface of the high-temperature portion of the refrigeration device is brought into contact with an inner wall surface of the case, and radiation fins are provided on an outer wall surface of the case. Refrigeration equipment. 7. The refrigerating apparatus according to claim 1, wherein a radiating fin is formed on an outer wall of the high-temperature portion of the refrigerating apparatus. 8. The refrigeration apparatus according to claim 1, wherein an air inlet and an air outlet are formed in the case. 9. The refrigerating apparatus according to claim 8, wherein an air cooling fan is provided in the case.