JP2003240373A - Jacket for heat-exchanger, and stirling refrigerating engine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a Stirling refrigerating engine with a cooling jacket easily attachable to a heat-radiation part and enhanced in cooling efficiency. <P>SOLUTION: A contact part contacting with the heat-radiation part 11 of the cooling jacket 40 attached to contact with the heat-radiation part 11 for radiating heat in a compression chamber to an outside is formed integrally into an annular shape. In the annular part 41 formed integrally into the annular shape, a cross-section thereof is formed into a U-shape, and an opening is provided in a side faced to the heat-radiation part 11. A recessed part 41a is formed in an opening side end part of the annular part 41, and an O-ring 48 is fitted into the recessed part 41a. When the cooling jacket 40 is assembled, press-in- fixation is executed to make a flow passage 47 in an inside water-tight by bringing the O-ring 48 into contact with an outer face of the heat-radiation part 11. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a Stirling refrigerating engine using a reverse Stirling refrigerating cycle, and a heat exchange jacket such as a cooling jacket used in this Stirling refrigerating engine.

[0002]

2. Description of the Related Art In general, a vapor compression refrigeration cycle is used as a refrigeration cycle used in a home refrigerator / freezer. In this vapor compression refrigeration cycle, Freon (chlorofluorocarbon) is used as a refrigerant, and the desired cooling performance is obtained by utilizing the condensation and evaporation of this Freon. However, it has been pointed out that CFC used as a refrigerant has a very high chemical stability and reaches the stratosphere to destroy the ozone layer when released into the atmosphere. Therefore, in recent years, the use and production of specific CFCs have been regulated.

Therefore, the reverse Stirling refrigeration cycle has been attracting attention as a cycle to replace the vapor compression refrigeration cycle using CFCs. In the reverse Stirling refrigeration cycle, since an inert gas such as helium gas or nitrogen gas can be adopted as a working medium, it does not adversely affect the global environment.

FIG. 7 is a sectional view for explaining the structure of a general Stirling refrigerating engine utilizing this reverse Stirling refrigerating cycle. In the free piston type Stirling refrigerating engine, the compression chamber 4 is provided between the piston 2 and the displacer 3 by coaxially fitting the piston 2 and the displacer 3 in the cylinder 1 having a cylindrical space inside. Expansion chambers 5 are formed between the displacer 3 and the closed end of the cylinder 1. A regenerator 6 is installed between the compression chamber 4 and the expansion chamber 5, and the compression chamber 4, the expansion chamber 5 and the regenerator 6 form a closed circuit. The above-mentioned inert gas is filled in the closed circuit.

The piston 2 is driven by a driving means such as a linear motor 7 and periodically reciprocates in the cylinder 1 in the axial direction. In response to the reciprocating force of this piston 2,
Periodic axial vibration also occurs in the displacer 3 and reciprocates in the cylinder 1 with the piston 2 with a constant phase difference. By the periodic reciprocating motion of the piston 2 and the displacer 3, the working gas in the compression chamber 4 and the expansion chamber 5 is repeatedly compressed and expanded.

With the above-described structure and operation, a reverse Stirling refrigeration cycle which is a known thermodynamic cycle is formed in the closed circuit. As a result, a low temperature is generated in the expansion chamber 5 and a high temperature is generated in the compression chamber 4. Here, the heat radiating portion (worm section) 11 plays a role of releasing the heat in the compression chamber 4 to the outside, and the high temperature side heat exchanger 10 plays a role of promoting this heat radiation. Further, the heat absorbing part (cold section) 13 plays a role of transferring external heat into the expansion chamber 5 (in other words, a role of transferring cold heat inside the expansion chamber 5 to the outside), and the low temperature side exchanger. 12 plays a role of promoting this heat transfer. As described above, an extremely low temperature is generated in the heat absorbing section 13 of the Stirling refrigerating engine, which cools the refrigerator or the freezer.

In order to improve the cooling performance in the Stirling refrigerating engine, it is necessary to efficiently take out cold heat from the heat absorbing portion 13. On the other hand, it is also important to improve the heat dissipation performance of the heat dissipation unit 11. When the heat radiation performance of the heat radiation portion 11 is insufficient, the reverse Stirling refrigeration cycle becomes unstable due to abnormal heat generation of the heat radiation portion 11, and the refrigeration capacity is significantly deteriorated. If this abnormal fever continues,
In the worst case, the Stirling refrigeration engine itself may be damaged.

Conventionally, the heat dissipation portion 11 of the Stirling refrigerating engine
For cooling, the cooling jacket 20 that performs heat exchange by circulating a refrigerant inside has been used. FIG. 8 is a view for explaining a conventional cooling jacket assembling structure, and FIG. 8A is an exploded perspective view, FIG.
(B) is a perspective view after assembly. In addition, FIG.
It is a schematic sectional drawing in IX-IX of (b). In addition,
In FIG. 9, only the cooling jacket and the heat radiating portion are shown, and the cylinder, displacer and the like are omitted.
Hereinafter, a conventional cooling jacket will be described with reference to the drawings.

As shown in FIG. 8A, the cooling jacket 20 is composed of a half-circle jacket 21 which is divided into two parts, and is sandwiched in both directions so as to come into contact with the outer peripheral surface of the heat radiating portion 11. Can be installed at. A collar provided with a fixing hole 22 is provided at each end of the jacket 21 divided into two, and a bolt 25 is inserted into the hole 22 and fixed by a nut 26 (see FIG. )
reference).

Next, referring to FIG. 9, the flow path provided inside the cooling jacket 20 will be described. An inflow port 23 and an outflow port 24 for the refrigerant are provided at predetermined positions in each of the two jackets 21. Inlet 2
The refrigerant that has flowed in from 3 exchanges heat with the heat dissipation portion 11 via the inner peripheral wall of the jacket 21 when passing through the flow path 27, reaches the outlet 24, and is discharged to the outside. The arrows in the figure indicate the direction in which the refrigerant flows. By constantly circulating the cooling medium through the cooling jacket 20, the heat of the heat radiating portion 11 is released to the outside.

[0011]

However, in the above-mentioned structure, since the jacket is formed in the shape of a semicircle, it is necessary to tighten it with bolts or the like when mounting it on the heat radiating portion. Usually, copper having a high thermal conductivity is used for the heat dissipation part in order to achieve high heat dissipation performance. Copper is softer than other metals and is easily deformed and distorted. Therefore, it is necessary to properly adjust the tightening torque, which complicates the work. If tightening is performed without adjusting the torque, the heat radiating portion may be deformed or distorted, which may lead to reduced efficiency or damage to the Stirling refrigeration engine.

Further, in the split type jacket, sufficient heat exchange is not performed at the joint portion between the jackets. This is designed so that the flange part of the jacket cannot be in close proximity to the inlet and outlet, and the flange parts of the divided jacket do not contact each other in order to bring the inner peripheral surface of the jacket and the peripheral surface of the heat dissipation part into close contact. It depends on what has been done.
For this reason, sufficient heat exchange is not performed in the joint portion, which leads to a reduction in efficiency of the Stirling refrigeration engine. As described above, the conventional cooling jacket has problems in improving the efficiency of the Stirling refrigerating engine and in the workability of mounting work.

Therefore, an object of the present invention is to provide a Stirling refrigerating engine equipped with a cooling jacket which can be easily attached to a heat radiating portion and whose cooling efficiency can be improved. It is to provide a heat exchange jacket having an excellent new structure.

[0014]

According to a first aspect of the present invention, there is provided a Stirling refrigerating engine having a piston and a displacer which reciprocate in a cylinder filled with a working gas, and a compression formed by the piston and the displacer. The chamber, the expansion chamber defined by the displacer and the closed end of the cylinder, the heat radiating unit that transfers the heat of the compression chamber to the outside, the heat absorbing unit that transfers the cold heat of the expansion chamber to the outside, and the heat radiating unit. A Stirling refrigerating engine having a cooling jacket attached so as to be in contact with each other, wherein the cooling jacket has an annular portion surrounding the heat radiating portion from the outside, and the annular portion is fitted to the heat radiating portion. Is characterized by.

As described above, the portion surrounding the heat radiating portion of the cooling jacket is integrally formed in an annular shape, and the annular portion integrally formed in the annular shape is fitted and fixed to the heat radiating portion, whereby the bolt is tightened. No need for fixing work by
Work can be simplified. Further, since the joint portion is also eliminated, the entire outer surface of the heat dissipation portion can be cooled, and the cooling efficiency can be improved. Furthermore, since the number of parts can be reduced, the manufacturing cost can be reduced.
Further, since the cooling jacket can be easily removed, the parts can be easily replaced.

In the Stirling refrigerating engine according to the first aspect of the present invention, for example, heat radiation in a cross section in which the outer shape of the heat absorbing portion in the cross section intersecting the fitting direction of the cooling jacket crosses the fitting direction of the cooling jacket. It is desirable that it is smaller than the outer shape of the part. In a Stirling refrigerating engine, the heat absorbing part is usually located at the end of the cylinder and the heat radiating part is located near the center of the cylinder.Therefore, design the outer shape of the heat radiating part smaller than that of the heat absorbing part. It is possible to attach a ring-integrated cooling jacket to the heat dissipation part. Further, since the cooling jacket can be easily removed from the heat absorbing portion side, the parts can be easily replaced.

In the Stirling refrigerating engine according to the first aspect of the present invention described above, for example, the outer shape of the heat radiating portion in the cross section intersecting with the fitting direction of the cooling jacket is enlarged as it goes in the fitting direction of the cooling jacket. It is desirable to have a tapered shape. By thus tapering the outer surface of the heat radiating portion, the cooling jacket is securely fitted and fixed to the heat radiating portion, and its adhesion is also improved.

In the Stirling refrigerating engine according to the first aspect of the present invention, for example, the cooling jacket is preferably provided with a flow passage therein, and the refrigerant is preferably configured to flow through this flow passage. As described above, high cooling performance is realized by using the cooling jacket in which the refrigerant is circulated. Liquids and gases can be considered as the refrigerant.

In the Stirling refrigerating engine according to the first aspect of the present invention, for example, the cooling jacket preferably has fins inside. In this way, by providing the fins inside, the contact area with the refrigerant increases, so that high cooling performance is realized. Also in this case, both liquid and gas can be considered as the refrigerant.

The heat exchanging jacket according to the present invention has an annular portion having a flow passage formed inside, and the annular portion is fitted to the outer surface of the object so as to surround the object for heat exchange from the outside. A heat exchange jacket that exchanges heat with an object by circulating a medium in a passage, wherein the annular portion
In a cross section including the axis of the annular portion, there is an opening on the side of the object, and at the opening side end of the annular portion, a seal member interposed between the outer surface of the object is located, and in the annular portion, the medium The outer surface of the object positioned so as to close the opening is included as the wall surface that constitutes the flow path of 1.

As described above, in the mounting structure of the type in which the heat exchange jacket is fitted to the object for heat exchange, a part of the wall surface forming the flow path through which the medium flows is the outer surface of the object for heat exchange. By configuring and connecting the heat exchange jacket to the outer surface of the object to be heat-exchanged by using the seal member, the medium and the object to be heat-exchanged can be brought into direct contact with each other, resulting in high heat exchange. Efficiency is realized. Further, since the heat exchanging jacket is fixed to the heat radiating portion by compressing the sealing member, there is no fear that the medium leaks out.
Both liquid and gas can be considered as the medium used in this case.

In the heat exchange jacket according to the present invention, it is desirable that the seal member be an O-ring. As described above, by using the O-ring as the seal member interposed between the heat exchange jacket and the object for heat exchange, not only the heat exchange jacket can be easily attached but also the simultaneous connection can be achieved. The flow path can be reliably sealed in the part.

In the heat exchange jacket according to the present invention described above, for example, it is preferable that a concave portion is formed at the end portion on the opening side of the annular portion, and an O-ring is fitted into this concave portion. As described above, by providing a recess at the end of the heat exchange jacket on the opening side and previously fitting the O-ring into the recess to attach the recess, it becomes easier to assemble the heat exchange jacket. In addition, by fitting an O-ring in the recess, O-ring can be used when it is attached to an object.
The ring is prevented from being displaced.

A Stirling refrigerating engine according to a second aspect of the present invention is a piston and a displacer reciprocating in a cylinder filled with a working gas, a compression chamber defined by the piston and the displacer, a displacer and a cylinder. The expansion chamber is defined by the closed end of the expansion chamber, the heat radiating unit that transfers the heat of the compression chamber to the outside, the heat absorbing unit that transfers the cold heat of the expansion chamber to the outside, and the heat radiating unit are attached to be in contact with each other. A Stirling refrigerating engine having a cooling jacket, wherein the cooling jacket attached to the heat radiating portion is any one of the heat exchange jackets described above.

As described above, by using any one of the heat exchange jackets described above as the cooling jacket assembled to the heat radiation portion of the Stirling refrigerating engine, a part of the wall surface constituting the flow path through which the medium flows is radiated. Since it can be configured on the outer surface of the portion, the refrigerant and the heat radiating portion can be directly brought into contact with each other, and high cooling performance is realized.

[0026]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 is a view for explaining an assembly structure of a cooling jacket of a Stirling refrigerating engine according to Embodiment 1 of the present invention, and FIG. 1 (a) is an exploded perspective view. 1 (b) is a perspective view after assembly. Moreover, FIG. 2 is a schematic cross-sectional view taken along line II-II of FIG. Note that, in FIG. 2, only the cooling jacket and the heat radiating portion are shown, and the cylinder, the displacer and the like are omitted.

As shown in FIG. 1A, unlike the conventional cooling jacket, the cooling jacket 30 of the Stirling refrigerating engine according to the first embodiment of the present invention has an annular contact point with a heat radiating portion. Is formed in. The inner peripheral surface of the annular integrated cooling jacket 30 is designed so as to come into close contact with the heat radiating portion 11 of the Stirling refrigerating engine. When assembling this cooling jacket 30, it is assembled by fitting it to the heat radiating portion 11 from the direction shown by the arrow in the figure, that is, from the heat absorbing portion side. Generally, this fitting is also called press fitting. As a result,
As shown in (b), the cooling jacket 30 is fixed to the heat radiating portion 11 so as to surround the outer peripheral surface of the heat radiating portion 11.

Next, the flow path provided inside the cooling jacket 30 will be described with reference to FIG. An inflow port 33 and an outflow port 34 are provided at predetermined positions of the cooling jacket 30. Preferably, the inflow port 33 and the outflow port 34 are provided at symmetrical positions with respect to the center point of the cooling jacket 30. The refrigerant that has flowed in from the inflow port 33 is split into two paths of the flow path 37, exchanges heat with the heat dissipation unit 11 via the inner peripheral wall of the cooling jacket 30, and reaches the outflow port 34. The arrows in the figure indicate the direction in which the refrigerant flows. By constantly circulating the cooling medium through the cooling jacket 30, the heat of the heat radiating portion 11 is released to the outside.

In order to realize the above structure, it is desirable that the outer diameter R _C of the heat absorbing portion 13 of the Stirling refrigerating engine is smaller than the outer diameter R _W of the heat radiating portion 11 as shown in FIG. . Accordingly, when the cooling jacket 30 is attached to the heat dissipation part 11, the heat absorption part 13 passes through the opening provided inside the cooling jacket 30 without coming into contact with the heat dissipation part 11, so that the heat dissipation part 11 can be press-fitted. Become. Also,
Similarly, the cooling jacket 30 can be removed over the heat absorbing portion 13.

Furthermore, as shown in FIG.
It is desirable that the outer peripheral surface of 1 is tapered so that its outer diameter gradually increases in the direction in which the cooling jacket 30 is press-fitted. As a result, the cooling jacket 30 is reliably press-fitted into the heat radiating portion 11, and the adhesion between the inner peripheral surface of the cooling jacket 30 and the outer peripheral surface of the heat radiating portion 11 is improved. The inclination angle θ of the taper is a small value such that the cooling jacket 30 can be press-fitted.

With the above construction, the fixing work such as the bolt tightening, which is conventionally required, becomes unnecessary, and the work can be simplified. Further, since the cooling jacket has no joint portion, heat can be exchanged over the entire outer peripheral surface of the heat dissipation portion, and heat exchange efficiency can be improved. Further, since only one refrigerant inlet and one refrigerant outlet are required for the cooling jacket, the refrigerant circulation system (not shown) can be simplified. Furthermore, since the number of parts can be reduced, the manufacturing cost can be reduced.

(Second Embodiment) FIG. 5 (a) is a side view of a Stirling refrigerating engine according to a second embodiment of the present invention, and FIG. 5 (b) is surrounded by a dotted line in FIG. 5 (a). FIG. In the figure, only the cooling jacket is shown in cross section.

Cooling jacket 4 in the present embodiment
Similarly to the cooling jacket of the first embodiment described above, 0 is integrally formed in an annular shape so that it can be fitted into the heat radiating portion 11. However, as shown in FIG. 5, the cross section of the annular portion 41 in the direction perpendicular to the traveling direction of the flow path 47 provided inside is U-shaped, and the heat radiating portion 11
The inner wall surface on the side facing is omitted. Further, a concave portion 41a is formed on the end surface of the U-shaped wall surface facing the heat dissipation portion 11, and an O-ring 48 which is a seal member is fitted in the concave portion 41a.

When this cooling jacket 40 is press-fitted and attached to the heat radiating portion 11, the wall surface forming the flow path 47 is the U-shaped wall surface of the cooling jacket 40 and the heat radiating portion 11 as shown in the figure. And the outer peripheral surface.
An O-ring 48 is interposed between the wall surface of the cooling jacket 40 and the outer peripheral surface of the heat dissipation portion 11, and the O-ring 48 is appropriately compressed to seal the flow path 47.

As described above, the ring-shaped integral cooling jacket whose inner peripheral surface is omitted is press-fitted into the heat radiating portion through the O-ring, so that the refrigerant flowing through the flow path directly contacts the heat radiating portion. It becomes possible to cool very efficiently. Further, by using the O-ring to maintain the adhesiveness, the cooling jacket can be easily assembled to the heat dissipation portion. However, in order to prevent the leakage of the refrigerant, the wall surface of the U-shaped cooling jacket and the outer peripheral surface of the heat radiating portion can be easily attached and detached rather than being fixed with an adhesive or the like. Furthermore, as compared with the first embodiment described above, the O-ring is compressed during press-fitting so that the heat-radiating portion is deformed.
Since distortion is less likely to occur, improvement in yield can be expected.

In order to further improve the cooling efficiency, it is preferable to design the width t of the flow passage in FIG. 5 (b) to be small. This is because when the width t is large, not all of the refrigerant that has flowed into the flow path comes into contact with the outer peripheral surface of the heat radiating portion. By decreasing the width t, the flow velocity and flow rate of the refrigerant are increased. Highly efficient cooling is possible without

(Third Embodiment) FIG. 6 is a view for explaining the structure of a cooling jacket for a Stirling refrigerating engine according to a third embodiment of the present invention. FIG. 6 (a) is a top view and FIG. 6B is a sectional view taken along line VIB-VIB of FIG. In addition, in this figure, the heat dissipation portion to which the cooling jacket is attached is also shown.

Cooling jacket 5 in the present embodiment
Similarly to the cooling jacket of the first embodiment, 0 is integrally formed in an annular shape so that it can be press-fitted into the heat radiating portion 11. However, as shown in FIG. 6, a plurality of fins 59 are provided on the inner peripheral surface of the cooling jacket 50 so as to project toward the flow path 57. By providing the fins 59, the contact area with the refrigerant is significantly increased, so that the heat exchange efficiency is improved. Both a liquid and a gas can be considered as the medium that flows in the flow path of the cooling jacket provided with this fin.

In the above-described embodiment, the heat radiating portion of the Stirling refrigerating engine has been described as an example of the object for heat exchange, but the present invention is not limited to the Stirling refrigerating engine and applied to other devices. Is possible. Further, although the heat radiating portion which becomes high in temperature is illustrated as an object for performing heat exchange, it is also applicable to an object which becomes low in temperature. In this case, a medium having a temperature higher than that of the object is used for heat exchange. That is, in the above-described embodiment, the cooling jacket for cooling the heat radiating portion of the Stirling refrigerating engine is merely an example, and it can be applied to any object as long as it can perform heat exchange.

Further, in the above embodiment, the case where the outer shape of the object for heat exchange is circular has been described as an example, but the present invention is not particularly limited to this, and the other outer shape is provided. It can also be applied to objects. However, in the case of the Stirling refrigerating engine, the outer shape of the heat radiating portion is usually circular.

As described above, the above-described embodiments disclosed this time are exemplifications in all respects, and are not restrictive. The technical scope of the present invention is defined by the claims, and includes the meaning equivalent to the description of the claims and all modifications within the scope.

[0043]

According to the present invention, it is possible to provide a Stirling refrigerating engine equipped with a cooling jacket which can be easily attached to a heat radiating portion and whose cooling efficiency can be improved.

Further, by using the heat exchange jacket of the present invention, it becomes possible to directly contact the object for heat exchange with the medium for heat exchange to perform heat exchange.
A highly efficient heat exchange is realized.

[Brief description of drawings]

FIG. 1A is an exploded perspective view of a Stirling refrigerating engine according to a first embodiment of the present invention before a cooling jacket is assembled, and FIG. 1B is a perspective view after a cooling jacket is assembled.

FIG. 2 is a schematic sectional view of a cooling jacket according to the first embodiment of the present invention.

FIG. 3 is a side view of the Stirling refrigerating engine according to the first embodiment of the present invention.

FIG. 4 is a side view showing a modified example of the Stirling refrigerating engine according to the first embodiment of the present invention.

5A is a side view of a Stirling refrigerating engine according to a second embodiment of the present invention, and FIG. 5B is an enlarged view of a main part thereof.

FIG. 6A is a top view and FIG. 6B is a sectional view of a cooling jacket according to a third embodiment of the present invention.

FIG. 7 is a cross-sectional view for explaining the structure of a general Stirling refrigerating engine.

FIG. 8A is an exploded perspective view of a conventional Stirling refrigerating engine before the cooling jacket is assembled, and FIG. 8B is a perspective view after the cooling jacket is assembled.

FIG. 9 is a schematic sectional view of a conventional cooling jacket.

[Explanation of symbols]

1 cylinder, 2 pistons, 3 displacer, 4
Compression chamber, 5 expansion chamber, 6 regenerator, 7 linear motor, 8 leaf spring (for piston), 9 leaf spring (for displacer), 10 high temperature side heat exchanger, 11 heat dissipation part, 12 low temperature side heat exchanger , 13 heat absorbing part, 14 casing, 30 cooling jacket, 33 inflow port, 34
Outflow port, 37 flow paths, 40 cooling jacket, 41
Annular part, 41a concave part, 47 flow path, 48 O-ring, 50 cooling jacket, 53 inflow port, 54 outflow port, 57 flow path, 59 fin.

Claims (9)

[Claims] 1. A piston and a displacer that reciprocate in a cylinder filled with a working gas, and a compression chamber defined by the piston and the displacer.
An expansion chamber defined by the displacer and the closed end of the cylinder, a heat radiating portion that transfers the heat of the compression chamber to the outside, a heat absorbing portion that transfers the cold heat of the expansion chamber to the outside, and the heat radiation. A Stirling refrigerating engine having a cooling jacket attached so as to be in contact with the portion, wherein the cooling jacket has an annular portion surrounding the heat radiating portion from the outside, and the annular portion is fitted to the heat radiating portion. Stirling refrigeration engine, characterized by being combined. 2. The outer shape of the heat absorbing portion in a cross section intersecting the fitting direction of the cooling jacket is smaller than the outer shape of the heat radiating portion in a cross section intersecting the fitting direction of the cooling jacket. Stirling refrigeration engine described in. 3. The outer shape of the heat radiating portion in a cross section intersecting with the fitting direction of the cooling jacket is tapered so as to expand as it goes in the fitting direction of the cooling jacket. Or the Stirling refrigerating machine described in 2. 4. The Stirling refrigerating engine according to claim 1, wherein the cooling jacket is provided with a flow passage therein, and the coolant is circulated through the flow passage. 5. The Stirling refrigerating engine according to claim 1, wherein the cooling jacket has fins therein. 6. An annular portion having a flow path formed therein,
A heat exchange jacket, wherein the annular portion is fitted to the outer surface of the object so as to surround the object for heat exchange from the outside, and heat exchange is performed with the object by circulating a medium in the flow path, The annular portion, in a cross section including the axis of the annular portion,
Having an opening on the side of the object, the opening side end of the annular portion, a seal member interposed between the outer surface of the object is located, in the annular portion, the flow path of the medium A heat exchange jacket including an outer surface of the object positioned so as to block the opening as a constituent wall surface. 7. The heat exchange jacket according to claim 6, wherein the seal member is an O-ring. 8. The heat exchange jacket according to claim 7, wherein a concave portion is formed at an opening side end portion of the annular portion, and the O-ring is fitted in the concave portion. 9. A piston and a displacer that reciprocate in a cylinder filled with a working gas, and a compression chamber defined by the piston and the displacer.
An expansion chamber defined by the displacer and the closed end of the cylinder, a heat radiating portion that transfers the heat of the compression chamber to the outside, a heat absorbing portion that transfers the cold heat of the expansion chamber to the outside, and the heat radiation. A heat exchange jacket according to any one of claims 6 to 8, which is a Stirling refrigerating engine provided with a cooling jacket attached so as to be in contact with the heat-dissipating section. There is a Stirling refrigeration engine.