WO2017213087A1

WO2017213087A1 - Heat exchanger

Info

Publication number: WO2017213087A1
Application number: PCT/JP2017/020832
Authority: WO
Inventors: 祥啓古賀
Original assignee: イビデン株式会社
Priority date: 2016-06-06
Filing date: 2017-06-05
Publication date: 2017-12-14
Also published as: JP2017219226A; CN109219728A

Abstract

This heat exchanger is equipped with a cylindrical case (10), a columnar ceramic body (20) stored in the case (10), and a sealing member (30) for sealing the space between the case (10) and the ceramic body (20). The case (10) has a pair of first openings (12, 13) which pass through the case (10) from the inside to the outside thereof, and are formed in both axial direction ends thereof, and also has a pair of second openings (14, 15) which pass through the case (10) from the inside to the outside thereof, and are formed in the circumferential surface thereof. The ceramic body (20) has a first channel through which a first heat medium passes, and a second channel through which a second heat medium passes. The first channel connects the space between the first openings (12, 13), while the second channel connects the space between the second openings (14, 15). The sealing member (30) is configured from a ring-shaped metal material, and is positioned between the end sections of the ceramic body (20) and the first openings (12, 13) so as to surround each first channel end section.

Description

Heat exchanger

The present invention relates to a heat exchanger that allows heat transfer from one heat medium to the other heat medium.

The ceramic heat exchanger disclosed in Patent Document 1 includes a heat exchanger, and the heat exchanger includes a first fluid circulation part and a second fluid circulation part. The first fluid circulation part is constituted by a plurality of cells that are partitioned by a partition wall and extend in the axial direction from one end face to the other end face. The second fluid circulation part is constituted by a plurality of cells that are partitioned by a partition wall and extend in a direction orthogonal to the axial direction. A heating body flows through the first fluid circulation portion, a heated body flows through the second fluid circulation portion, and heat is transferred from the heating body to the heated body. The heat exchanger is placed inside the heat exchanger holding container.

JP 2010-271031 A

In heat exchangers, heat media with different physical properties circulate, so it is necessary to isolate them from each other. Therefore, it is necessary to consider the sealing property of the passage configuration of the heat medium on the assumption that the heat medium flows through the ceramic body that performs the heat exchange function accommodated in the case.

A heat exchanger for solving the above problems includes a cylindrical case, a columnar ceramic body housed in the case, and a sealing member that seals between the case and the ceramic body. A heat exchanger, wherein the case is formed at both ends in the axial direction and has a pair of first openings penetrating the inside and the outside of the case, and is formed on the peripheral surface, and is formed on the inside and outside of the case. The ceramic body has a first flow path through which the first heat medium flows and a second flow path through which the second heat medium flows, and the first flow The path communicates between the pair of first openings, the second flow path communicates between the pair of second openings, and the sealing member is made of an annular metal material, The first opening and the ceramic body so as to surround each flow path end of the first flow path. It is summarized as that arranged between the parts.

The first heat medium flowing through the ceramic body flows into and out of the first flow path through the first opening, and the second heat medium flowing through the ceramic body also flows through the second opening through the second flow path. Flow into and out. The sealing member may cause a situation in which the first heat medium enters between the case and the ceramic body without flowing into the first flow path from one of the first openings, and the other of the first heat medium from the first flow path. The occurrence of a situation of entering between the case and the ceramic body without flowing out into one opening is suppressed. Therefore, according to the said structure, the airtightness of a 1st opening part and a 1st flow path and the airtightness of a 2nd opening part and a 2nd flow path can be ensured suitably.

For the heat exchanger, the sealing member includes a first annular portion that is pressed against the first opening, a second annular portion that is pressed against the end of the ceramic body, and the It is preferable to have a connection portion that connects the end portion of the first annular portion and the end portion of the second annular portion. According to this configuration, even if a change occurs in the separation length due to thermal expansion between the first opening of the case and the end of the ceramic body, the first annular portion and the second annular follow the change. The part is displaced. Therefore, it contributes to the improvement of the sealing function of the sealing member.

In the heat exchanger, it is preferable that an end portion of the ceramic body has an annular concave groove, and the sealing member is engaged with the concave groove. According to this configuration, since the sealing member establishes the engagement relationship with the concave groove, the positional deviation of the sealing member can be suppressed.

About the said heat exchanger, the said ceramic body has the rib protruded to the outer direction over the perimeter at each edge part of the surrounding wall of this ceramic body, The axial direction outer surface of the said rib, Opposite to this surface It is preferable that the sealing member is disposed between the opening inner surface of the first opening of the case. In disposing the sealing member between the case and the ceramic body, the peripheral wall of the ceramic body is formed to have an appropriate thickness, the axially outer surface of the peripheral wall, and the opening of the first opening of the case facing this surface It is conceivable to arrange a sealing member between the inner surface. However, in this configuration, since the peripheral wall of the ceramic body is formed to have an appropriate thickness, there is also a problem that causes a problem such as an increase in weight and cost of the heat exchanger. In the said structure, a sealing member is arrange | positioned with respect to the axial direction outer surface of a rib. Therefore, it is advantageous in terms of weight reduction and cost reduction of the heat exchanger as compared with the case where the entire peripheral wall of the ceramic body is configured with a wall thickness.

In the heat exchanger, the axial outer surface of the rib is in the same position as the end surface of the end portion of the ceramic body in the axial direction, or is more outward in the axial direction than the end surface of the end portion of the ceramic body. Preferably it is located. According to this configuration, the end of the ceramic body does not protrude outward in the axial direction from the outer surface of the rib in the axial direction. For this reason, when the outer surface in the axial direction of the rib to be formed with the groove is surface processed, the complexity of the surface processing due to the end of the ceramic body projecting outward is eliminated.

According to the present invention, it is possible to more suitably ensure the sealing property of the flow path configuration of the heat medium.

The perspective view of a heat exchanger. The perspective view of a honeycomb structure. The lateral end view of the 1st flow path of a honeycomb structure. The lateral end view of the 2nd flow path of a honeycomb structure. FIG. 2 is a sectional view taken along line 2-2 of FIG. FIG. 3 is a sectional view taken along line 3-3 in FIG. 1. (A), (b) is an enlarged view of a ditch | groove and a sealing member. The perspective view of the ceramic body of another embodiment. (A), (b) The enlarged view of the ditch | groove and sealing member of another embodiment.

One embodiment of a heat exchanger will be described.
As shown in FIG. 1, the heat exchanger includes a case 10. The case 10 has a case main body 11 having a cylindrical shape, and has a welded portion 16 at the central portion in the axial direction of the case main body 11. The welded portion 16 extends along the circumferential direction of the case body 11. The case 10 has a pair of first openings at both axial ends of the case body 11. The first axial opening 12 as the first opening has a first opening wall 12 a formed in an annular shape, and the outer peripheral end of the opening wall 12 a is connected to the edge of the case body 11 in the axial direction. Has been. The first axial opening 12 has a first connecting pipe 12b formed in a cylindrical shape having a diameter smaller than that of the case body 11, and an axial end edge of the first connecting pipe 12b is formed on the opening wall 12a. Connected to the inner periphery. Similar to the first axial opening 12, the second axial opening 13 as the first opening also has a second opening wall 13a and a second connecting pipe 13b.

As shown in FIG. 1, the case 10 has a pair of second openings on the peripheral surface of the case body 11. The first radial opening 14 as the second opening has a first through hole 14a, and the through hole 14a is a position that is the uppermost part of the peripheral surface of the case main body 11, and the case main body. 11 is formed at a position on the first axial direction opening 12 side in the axial direction. The first radial opening 14 has a first connecting pipe 14b formed in a cylindrical shape, and an axial end edge of the first connecting pipe 14b is connected to an inner peripheral end of the first through hole 14a. Yes. The second radial opening 15 as the second opening has a second through hole 15 a, and the second through hole 15 a is a position that is the lowest part of the peripheral surface of the case body 11. In the axial direction of the case body 11, it is formed at a position on the second axial opening 13 side. The second radial opening 15 has a second connecting pipe 15b formed in a cylindrical shape, and an axial end edge of the second connecting pipe 15b is connected to an inner peripheral end of the second through hole 15a. Yes.

In addition, the material of case 10 is not specifically limited, The material used for a well-known heat exchanger can be used. For example, a metal and resin are mentioned. Among these, it is preferable to use a metal excellent in heat resistance and impact resistance.

The heat exchanger has a columnar ceramic body 20 housed in the case 10. As shown in FIG. 2, the ceramic body 20 has a honeycomb structure 21. The honeycomb structure 21 includes a cylindrical peripheral wall 22 and a partition wall 23 having a honeycomb shape in section that partitions the inside of the peripheral wall 22 into a plurality of cells extending in the axial direction of the peripheral wall 22.

As shown in FIGS. 3 and 4, the cell S partitioned by the partition wall 23 is divided into two cells, a first cell S1 whose both ends are open and a second cell S2 whose both ends are closed. It consists of different types of cells. As shown in FIG. 3, all the cells S arranged in the first direction (vertical direction in FIG. 2) are the same type of cells. Further, the cells S adjacent in the second direction (the front and back direction in FIG. 2) orthogonal to the first direction are different types of cells.

As shown in FIG. 4, in the honeycomb structure 21, each portion formed by the second cells S <b> 2 arranged in the first direction (a cell row including the second cells S <b> 2) is formed to extend in the first direction. Thus, a first communication part 24a and a second communication part 24b are provided that communicate with each other between the second cells S2 adjacent in the first direction.

The first communication portion 24 a is provided on the first end portion 21 a side of the honeycomb structure 21. An end portion (that is, a base end) on one side (upper side in FIG. 4) in the first direction of the first communication portion 24a opens to the peripheral wall 22 and an end portion (that is, the lower side in FIG. 4) on the other side (ie, the lower side in FIG. 4). The tip) reaches the second cell S2 located on the most other side in the first direction.

The second communication portion 24 b is provided on the second end portion 21 b side of the honeycomb structure 21. The end (namely, the base end) on the other side (the lower side in FIG. 4) of the second communication portion 24b in the first direction opens to the peripheral wall 22 and is the end on the same side (the upper side in FIG. 4) (ie, the upper side) The tip) reaches the second cell S2 located on the most side in the first direction.

Therefore, the inside of the honeycomb structure 21 is constituted by the first cell S1, and is constituted by the first channel having both the axial ends of the honeycomb structure 21 as the inlet or outlet, and the second cell S2. A second flow path that is formed in the peripheral wall 22 of the honeycomb structure 21 and has the openings of the first communication portion 24a and the second communication portion 24b as the inlet or outlet is formed. Both ends in the axial direction of the honeycomb structure 21 become the channel ends of the first channel. The honeycomb structure 21 having such a configuration can exchange heat through the partition wall 23 between the first heat medium flowing through the first flow path and the second heat medium flowing through the second flow path.

As shown in FIG. 2, the ceramic body 20 has an annular first rib 25 protruding radially outward at the first end 21 a of the honeycomb structure 21, and the second end 21 b of the honeycomb structure 21. 2 has an annular second rib 26 projecting radially outward. The first ribs 25 are arranged such that the axial outer surface 25a of the first ribs 25 and the end surface of the first end portion 21a of the honeycomb structure 21 are in the same position in the axial direction of the honeycomb structure 21. The second ribs 26 are also arranged so that the axial outer surface 26 a of the second ribs 26 and the end surface of the second end portion 21 b of the honeycomb structure 21 are in the same position in the axial direction of the honeycomb structure 21.

As shown in FIG. 3, the first rib 25 is recessed in the axial direction of the honeycomb structure 21 on the axial outer surface 25a, and has an annular groove 25b surrounding the end surface of the first end portion 21a of the honeycomb structure 21. Have. The second rib 26 is recessed in the axial direction of the honeycomb structure 21 on the axial outer surface 26 a, and has an annular groove 26 b surrounding the end surface of the second end portion 21 b of the honeycomb structure 21.

The material of the ceramic body 20 is not particularly limited, and a ceramic material used for a known heat exchanger can be used, and examples thereof include oxide ceramics, nitride ceramics, and carbide ceramics. Examples of the oxide ceramic include alumina, zirconia, cordierite, and mullite. Examples of the nitride ceramic include aluminum nitride, silicon nitride, boron nitride, and titanium nitride. Examples of the carbide ceramic include silicon carbide, zirconium carbide, titanium carbide, tantalum carbide, and tungsten carbide.

The ceramic body 20 is not limited to a sintered body obtained by sintering the ceramic particles exemplified as the ceramic material, and the ceramic body 20 is configured by filling the ceramic particles exemplified as the ceramic material with another metal compound or metal. Shall be included. Specifically, those constituted by filling metal silicon between particles of a metal compound selected from silicon carbide, aluminum oxide, silicon nitride and the like are included.

5 and 6, the first axial opening 12 of the case 10 and the first end 21a of the honeycomb structure 21 of the ceramic body 20 are disposed so as to face each other. In this arrangement, the end face of the first connecting pipe 12 b of the first axial opening 12 faces the end face of the peripheral wall 22 in the first end 21 a of the honeycomb structure 21. The second axial opening 13 of the case 10 and the second end 21b of the honeycomb structure 21 of the ceramic body 20 are arranged to face each other. In this arrangement, the end face of the second connecting pipe 13 b of the second axial opening 13 faces the end face of the peripheral wall 22 at the second end 21 b of the honeycomb structure 21.

As shown in FIGS. 5 and 6, the heat exchanger includes a first sealing member 30 and a second sealing member 40 as sealing members. The first sealing member 30 is disposed between the first axial opening 12 of the case 10 and the first rib 25 of the ceramic body 20. The first sealing member 30 is made of an annular metal material. The first sealing member 30 has a S-shaped cross section. The first sealing member 30 has a first annular portion 31 and a second annular portion 32, and connects the outer peripheral side end of the first annular portion 31 and the inner peripheral end of the second annular portion 32. The connecting portion 33 is provided.

As shown in FIG. 7A, the first annular portion 31 is in pressure contact with the inner surface of the first opening wall 12a of the first axial opening 12 in line contact. The second annular portion 32 is in line contact with and in pressure contact with the bottom surface of the groove 25b of the first rib 25. As shown in FIG. 7B, the first sealing member 30 is in a state before being arranged between the case 10 and the ceramic body 20, and the inner peripheral side end of the first annular portion 31 and the second end. The distance from the outer peripheral side end of the annular portion 32, that is, the thickness of the first sealing member 30 is set to a predetermined length L1. This length L1 is set longer than the separation length L2 between the opening inner surface of the first opening wall 12a and the bottom surface of the concave groove 25b.

As shown in FIGS. 5 and 6, the second sealing member 40 is disposed between the second axial opening 13 of the case 10 and the second rib 26 of the ceramic body 20. The second sealing member 40 is made of an annular metal material. The second sealing member 40 has a S-shaped cross section. The second sealing member 40 includes a first annular portion 41 and a second annular portion 42, and connects the outer peripheral side end of the first annular portion 41 and the inner peripheral side end of the second annular portion 42. The connecting portion 43 is provided. The dimensional relationship between the length L1 which is the thickness of the second sealing member 40 and the separation length L2 between the case 10 and the ceramic body 20 is the same as in the case of the first sealing member 30. Therefore, the first annular portion 41 is in line contact with and in pressure contact with the inner surface of the second opening wall 13a of the second axial opening portion 13, and the second annular portion 42 is the bottom surface of the groove 26b of the second rib 26. It is in line contact and pressure contact.

The material of the first sealing member 30 and the second sealing member 40 is not particularly limited, and a known metal material used as a sealing member can be used. Among these, it is preferable to use stainless steel excellent in heat resistance and corrosion resistance.

5 and 6, the first radial opening 14 of the case 10 and the opening of the first communicating portion 24a in the honeycomb structure 21 of the ceramic body 20 are disposed so as to face each other. In this arrangement, the first connecting pipe 14 b of the first radial opening 14 is directed to the opening of the first communication portion 24 a of the honeycomb structure 21. The second radial opening 15 of the case 10 and the opening of the second communication portion 24b in the honeycomb structure 21 of the ceramic body 20 are disposed so as to face each other. In this arrangement, the second connecting pipe 15 b of the second radial opening 15 is directed to the opening of the second communication portion 24 b of the honeycomb structure 21.

As shown in FIGS. 5 and 6, a holding material 50 is disposed between the case 10 and the ceramic body 20. The holding member 50 is disposed between the inner surface of the case body 11 and the peripheral wall 22 of the honeycomb structure 21 and is formed in an annular shape so as to cover the entire circumferential direction of the peripheral wall 22. The holding member 50 divides the gap between the inner surface of the case body 11 and the peripheral wall 22 of the honeycomb structure 21 into two in the axial direction of the honeycomb structure 21, and the first gap R1 is divided into the first gap R1. The opening of the 1st communication part 24a is located, and the opening of the 2nd communication part 24b is located in the other divided 2nd space | gap R2. The material of the holding member 50 is not particularly limited, and for example, an inorganic fiber mat or a metal mesh can be used.

A method for assembling each member of the heat exchanger of this embodiment will be described.
The case 10 is composed of two members, a first member 10A on the first axial opening 12 side and a second member 10B on the second axial opening 13 side, with the welded portion 16 of the case body 11 as a boundary. Yes. The holding material 50 is wound around and fixed to the peripheral wall 22 of the honeycomb structure 21 of the ceramic body 20. Next, the second annular portion 32 of the first sealing member 30 is fitted into the concave groove 25b of the first rib 25 of the ceramic body 20, and is inserted into the first member 10A of the case 10 in that state. At this time, the first annular portion 31 of the first sealing member 30 abuts on the inner surface of the first opening wall 12 a of the first axial opening 12. Next, the second annular portion 32 of the second sealing member 40 is fitted into the concave groove 26b of the second rib 26 of the ceramic body 20, and is inserted into the second member 10B of the case 10 in that state. At this time, the first annular portion 41 of the second sealing member 40 abuts on the inner surface of the second opening wall 13 a of the second axial opening 13. Since the first member 10A and the second member 10B of the case 10 are spaced apart from each other by a predetermined distance, they are arranged so that the edges of the first member 10A and the second member 10B are in contact with each other. Weld the contact edges together.

A usage pattern of the heat exchanger of the present embodiment will be described.
The heat exchanger is disposed on the flow path of the heat medium. The first connecting pipe 12b, the second connecting pipe 13b, the first connecting pipe 14b, and the second connecting pipe 15b of the case 10 are connected to pipes that form a flow path of the heat medium. As shown in FIG. 5, the 1st heat medium which flowed into the 2nd connection pipe 13b reaches the end surface of the 2nd end part 21b of the honeycomb structure 21 via the 2nd opening wall 13a. Then, it flows into the first cell S1 of the honeycomb structure 21, flows along the first cell S1, and reaches the end surface of the first end portion 21a. The first heat medium that has passed through the honeycomb structure 21 flows out to the first connecting pipe 12b through the first opening wall 12a.

As shown in FIG. 6, the second heat medium that has flowed into the first connecting pipe 14 b passes through the through holes 14 a of the case main body 11, and the second heat medium between the inner surface of the case main body 11 and the peripheral wall 22 of the honeycomb structure 21. One gap R1 is reached. The second heat medium flows into the first communication part 24a from the opening formed in the peripheral wall 22 of the honeycomb structure 21, flows along the second cell S2, and reaches the second communication part 24b. The second communication portion 24b is opened in the peripheral wall 22 of the honeycomb structure 21, and the second heat medium flows into the second gap R2 through this opening. On the other hand, the second heat medium that has reached the first gap R1 passes through the holding member 50 located between the inner surface of the case body 11 and the peripheral wall 22 of the honeycomb structure 21, and flows into the second gap R2. The second heat medium flowing into the second gap R2 flows out to the second connection pipe 15b through the through hole 15a of the case body 11.

Thus, the first heat medium and the second heat medium that have flowed into the case 10 circulate through the ceramic body 20 accommodated in the case 10. The first heat medium and the second heat medium have different thermal properties. Accordingly, heat is transferred from one to the other as the heat medium flows through the heat exchanger.

The effect of the heat exchanger of this embodiment is demonstrated.
(1) The first sealing member is disposed between the first axial opening and the ceramic body so as to surround the end face of the first end of the honeycomb structure. The second sealing member is disposed between the second axial opening and the ceramic body so as to surround the end face of the second end of the honeycomb structure. Therefore, the 1st heat carrier which distribute | circulates a ceramic body flows in and out of a 1st flow path through a 1st axial direction opening part and a 2nd axial direction opening part. Therefore, the occurrence of a situation in which the first heat medium enters between the case and the ceramic body without flowing into the first cell S1 of the honeycomb structure from the second axial opening, and the first cell S1 to the first cell Occurrence of a situation of entering between the case and the ceramic body without flowing into the axial opening is suppressed. Therefore, it is possible to suitably ensure the sealing performance of the first axial opening and the first flow path and the sealing performance of the second axial opening and the first flow path.

(2) Depending on the temperature of the heat medium flowing through the heat exchanger, the heat exchanger may thermally expand. In that case, a difference arises between the thermal expansion of the case and the thermal expansion of the ceramic body, and due to the difference in thermal expansion, a change in the separation length between the case and the ceramic body may become large. The first sealing member of the present embodiment is pressed against the opening inner surface of the first opening wall and the groove of the first rib, and the second sealing member is recessed of the opening inner surface of the second opening wall and the second rib. It is in pressure contact with the groove. That is, based on the thermal expansion that may occur in the heat exchanger, the difference in thermal expansion between the case and the ceramic body is obtained, and the length L1 that is the thickness of the sealing member is such that the thermal expansion difference can be absorbed. Is set. Therefore, even if the separation length changes due to the difference in thermal expansion between the case and the ceramic body, the first annular portion and the second annular portion are displaced following the change. Therefore, the sealing function of the sealing member is improved.

(3) The first rib of the ceramic body has a groove on the outer surface in the axial direction, and the second annular portion of the first sealing member is in pressure contact with the groove. Moreover, it has a ditch | groove in the axial direction outer surface in a 2nd rib, and the 2nd annular part of the 2nd sealing member is press-contacted to the ditch | groove. Therefore, since the second annular portion of the sealing member and the concave groove establish an engagement relationship, positional deviation of the sealing member can be suppressed.

(4) The concave groove in which the second annular portion of the sealing member is in pressure contact is formed in the rib of the ceramic body. For example, it is also conceivable to form a concave groove on the end face of the peripheral wall of the honeycomb structure. However, in this case, it is necessary to increase the thickness of the peripheral wall accordingly in consideration of the formation of the concave groove. Therefore, the configuration of the present embodiment in which the concave grooves are formed in the ribs is advantageous in terms of weight reduction and cost reduction of the heat exchanger as compared with the case where the entire peripheral wall of the honeycomb structure is configured to have a wall thickness.

(5) There may be a difference between the channel cross-sectional area of the first connecting pipe in the first radial opening and the channel cross-sectional area in the opening of the first communicating part of the honeycomb structure. In the present embodiment, a first gap is formed between the inner surface of the case body and the peripheral wall of the honeycomb structure. Therefore, the difference in the flow path cross-sectional area can be suitably absorbed. In addition, the same effect as this is achieved by the second gap.

(6) On the peripheral wall of the honeycomb structure, a holding material is formed in an annular shape so as to cover the entire circumferential direction of the peripheral wall. The flow rate of the second heat medium that passes through the holding material can be set by setting the density of the holding material.

(7) The first ribs of the ceramic body are arranged so that the axial outer surface of the first rib and the end surface of the first end of the honeycomb structure are in the same position in the axial direction of the honeycomb structure. The second ribs are also arranged so that the axially outer surface of the second ribs and the end surface of the second end of the honeycomb structure are in the same position in the axial direction of the honeycomb structure. Therefore, when the outer surface in the axial direction of the rib is surface processed, the complexity of the surface processing associated with the end portion of the honeycomb structure projecting in the axial direction can be eliminated.

The present embodiment can be implemented with the following modifications. Moreover, it is also possible to implement combining the structure of the said embodiment and the structure shown in the following modified examples suitably.
-The 1st flow path and 2nd flow path which are formed in a ceramic body do not need to be formed for a honeycomb structure. For example, as shown in FIG. 8, a plurality of ceramic tubes 28 are connected between a pair of ceramic plates 27 formed with a plurality of through holes 27A, and the through holes 27A of the ceramic plates 27 and the ceramic tubes 28 are communicated. It is good also as the structure made to do. In this case, the inside of the ceramic tube 28 becomes the first flow path, and the gap between the ceramic tubes 28 becomes the second flow path.

The holding material arranged on the peripheral wall of the honeycomb structure is not limited to an annular shape so as to cover the entire circumferential direction of the peripheral wall. If the opening of the first communication part 24a and the opening of the second communication part 24b formed on the peripheral wall of the ceramic body are not covered, it is possible to change the size in the axial direction and the circumferential direction of the ceramic body. . Also, the setting of the thickness of the holding material can be arbitrarily changed. For example, it can be set to be the same as the height of the first rib and the second rib, or can be set to be thicker than the height of the ribs.

・ The shape of the honeycomb structure is not limited to a cylindrical shape. For example, it can be formed in a prismatic shape. The shape of the case can be changed in accordance with the shape change of the ceramic body.

· The case is composed of two members with the welded portion of the case body as a boundary, but the number of members constituting the case is not limited to two. There may be three or more. The position where the case is divided into a plurality of members is not limited to the central portion of the case body. For example, you may comprise so that a case may be divided | segmented in the position of the boundary of a case main body and a 1st opening wall.

· The configuration of the first axial opening is not particularly limited. For example, instead of the configuration including the first opening wall and the first connecting pipe, the end portion of the case main body may be provided with a tapered wall having a smaller diameter as the distance from the end portion increases. Moreover, it is also possible to comprise the 1st connection pipe in the taper shape which becomes a small diameter, so that it separates from the 1st opening wall. Similarly, the configuration of the second axial opening is not particularly limited.

· The positions of the first radial opening and the second radial opening with respect to the peripheral surface of the case body are not particularly limited. For example, the first radial opening may be arranged on the second axial opening side, and the second radial opening may be arranged on the first axial opening side. Further, as viewed from the axial direction of the case, the first radial opening and the second radial opening may be arranged so as to sandwich the central axis of the case main body in the horizontal direction. That is, the first radial opening and the second radial opening are displaced by 90 degrees around the axis of the case while maintaining a state in which they are opposed to each other in the radial direction of the case (a direction orthogonal to the axial direction of the case). May be.

・ The cross-sectional shape of the sealing member is not particularly limited. For example, as shown in FIG. 9, a C-shaped cross section may be adopted. In this case, it has the 1st annular part 31 and 2nd annular part 32 which are arrange | positioned as a pair of free end by which the outer peripheral side was open | released, The inner peripheral side edge part of these 1st annular part 31 and the 2nd annular part 32 The connection part 33 which connects is connected. As shown in FIG. 9A, the first annular portion 31 is in line contact with and in pressure contact with the inner surface of the first opening wall 12 a of the first axial opening 12. The second annular portion 32 is in line contact with and in pressure contact with the bottom surface of the groove 25b of the first rib 25. As shown in FIG. 9B, the first sealing member 30 is the outer periphery of the first annular portion 31 and the second annular portion 32 in a state before being disposed between the case 10 and the ceramic body 20. The distance between the side ends, that is, the thickness of the first sealing member 30 is set to a predetermined length L1. This length L1 is set longer than the separation length L2 between the opening inner surface of the first opening wall 12a and the bottom surface of the concave groove 25b. Even if the separation length is changed due to a difference in thermal expansion between the case and the ceramic body, the first annular portion 31 and the second annular portion 32 are displaced following the change, whereby the sealing member The thickness follows the change in the distance between the case and the ceramic body. Moreover, it is also possible to employ a sealing member formed in a U-shaped cross section or a V-shaped cross section. In accordance with such a cross-sectional shape, the cross-sectional shapes of the first annular portion and the second annular portion are changed, or the connecting portion is omitted. Depending on the cross-sectional shape of the sealing member, the case and the ceramic body may be brought into surface contact. Moreover, it is also possible to arrange | position so that the free end of the 1st annular part of a sealing member and a 2nd annular part may face an inner peripheral side.

· The arrangement of the grooves in the ceramic body is not limited to the outer surface of the rib in the axial direction. For example, the peripheral wall of the honeycomb structure may be formed to have a predetermined thickness, and the sealing member may be disposed so as to form a concave groove on the end surface of the peripheral wall. It is also possible to omit the groove from the ceramic body. In this case, the sealing member comes into pressure contact with the axial outer surface of the rib and the end surface of the peripheral wall.

-The structure which becomes the object which a sealing member engages is not limited to a concave groove. If a projecting ridge extending in an annular shape is formed at the end of the ceramic body and an annular sealing member is disposed on the inner or outer peripheral surface of the projecting ridge, the projecting strip suppresses the displacement of the sealing member. Can do.

· The ceramic body can omit the first rib and the second rib. In this case, the diameter of the case main body is shortened by the height of the first rib and the second rib, and the heat exchanger becomes smaller accordingly.

It is also possible to adopt a configuration in which the end surface of the end portion of the honeycomb structure is positioned outward in the axial direction from the outer surface in the axial direction of the rib. In this case, the peripheral wall at the end of the honeycomb structure contributes to suppress the displacement of the sealing member.

・ It is possible to change the flow direction of the heat medium in the usage form of the heat exchanger. The first heat medium may flow from the first axial opening to the second axial opening, or the second heat medium may flow from the second radial opening to the first radial opening. You may make it do.

10 ... Case, 12, 13 ... First opening, 14, 15 ... Second opening, 20 ... Ceramic body, 25, 26 ... Rib, 25b, 26b ... Ditch, 30, 40 ... Sealing member

Claims

A heat exchanger comprising a cylindrical case, a columnar ceramic body housed in the case, and a sealing member for sealing between the case and the ceramic body,
The case has a pair of first openings formed at both ends in the axial direction and passing through the inside and outside of the case, and a pair of second openings formed at the peripheral surface and passing through the inside and outside of the case. Has an opening,
The ceramic body has a first flow path through which the first heat medium flows and a second flow path through which the second heat medium flows, and the first flow path is between the pair of first openings. The second flow path communicates between a pair of the second openings,
The sealing member is made of an annular metal material, and is disposed between the first opening and the end of the ceramic body so as to surround each flow path end of the first flow path. A heat exchanger characterized by
The sealing member includes a first annular portion that is in pressure contact with the first opening, a second annular portion that is in pressure contact with an end portion of the ceramic body, and an end of the first annular portion. The heat exchanger according to claim 1, further comprising a connecting portion that connects a portion and an end portion of the second annular portion.
The heat exchanger according to claim 1 or 2, wherein an end portion of the ceramic body has an annular concave groove, and the sealing member is engaged with the concave groove.
The ceramic body has ribs projecting outward over the entire circumference at each end of the peripheral wall of the ceramic body, and an axially outer surface of the rib and a first of the case facing the surface. The heat exchanger according to any one of claims 1 to 3, wherein the sealing member is disposed between an opening inner surface of the opening.
The axially outer surface of the rib is located at the same position as the end surface of the end portion of the ceramic body in the axial direction, or is located outward in the axial direction from the end surface of the end portion of the ceramic body. The described heat exchanger.