JP5758991B2 - Heat exchanger and refrigeration cycle apparatus including the same - Google Patents

Description

  The present invention relates to a heat exchanger that performs heat exchange between a first refrigerant and a second refrigerant, and a refrigeration cycle apparatus including the heat exchanger.

  As a conventional heat exchanger, a flat first flat tube having a plurality of through holes through which a high-temperature refrigerant flows, a flat second flat tube having a plurality of through holes through which a low-temperature fluid flows, and a first flat tube A first header connected to both ends and a second header connected to both ends of the second flat tube are provided, and the first flat tube and the second flat tube are parallel to each other in the longitudinal direction (flow direction of the refrigerant). In this way, there is one that obtains high heat exchange performance by causing the flat surfaces to be contact-laminated by brazing or the like (see, for example, Patent Document 1).

JP 2002-340485 A (page 8, FIG. 1)

However, since the flat tubes are joined to each other in the heat exchanger as described above, there is a problem that the joint surface becomes a thermal resistance and the heat exchange performance is lowered.
In addition, when joining by brazing or the like, there is a problem that voids are likely to be generated on the joining surface, resulting in a decrease in heat exchange performance.
In addition, when brazing joints between the header and flat tubes and between flat tubes at the same time, it is necessary to manage the entire heat exchanger at a uniform temperature during processing, and it is also suitable for brazing joints. There is also a problem that the processing of the heat exchanger becomes complicated and difficult, such as requiring high-accuracy clearance management between the flat tube and the flat tube.
Further, when the layers are laminated in order to increase the heat exchange capacity, there is a problem that the header interferes.

The present invention has been made to solve the above problems, and a first object is to provide a heat exchanger that can be configured compactly and that can be easily manufactured, and a refrigeration cycle apparatus including the heat exchanger. Is to get.
And the 2nd objective is to obtain the heat exchanger and refrigeration cycle device which improved heat exchange performance.

The heat exchanger according to the present invention includes a first refrigerant path configured by arranging a plurality of first refrigerant flow paths through which a first refrigerant flows in a line, and a plurality of second refrigerant flows through which the second refrigerant flows. And a second refrigerant path configured by integrally arranging paths in a row, and the main body includes a main body in a parallel direction of the plurality of first refrigerant channels at both ends of the first refrigerant path. Formed as a through-hole, formed as a first communication hole communicating with the plurality of first refrigerant channels, and a hole penetrating the main body in the parallel direction of the plurality of second refrigerant channels at both ends of the second refrigerant path, A second communication hole communicating with the plurality of second refrigerant flow paths, the first refrigerant flows into one of the first communication holes formed at both ends of the first refrigerant path, and the first refrigerant flow path Circulates and flows out to the outside through the other first communication hole, and the second refrigerant is formed at both ends of the second refrigerant path. Flows into one of the holes, flows through the second refrigerant flow path, flows out to the outside via the other second communication hole, and the flow direction of the first refrigerant flow path and the second refrigerant flow path is Parallel to each other and arranged adjacent to each other, heat exchange between the first refrigerant and the second refrigerant is performed via the partition walls on the adjacent surfaces , and the first refrigerant path is a plurality of first refrigerant flow paths. There are a plurality of first refrigerant flow path groups that are a set, and the second refrigerant path has a plurality of second refrigerant flow path groups that are a set of a plurality of second refrigerant flow paths, and each of the first refrigerant paths in the first refrigerant path. The refrigerant flow path groups and the second refrigerant flow path groups in the second refrigerant path are alternately arranged adjacent to each other, and the parallel directions in all the refrigerant flow path groups are parallel to each other. The holes are formed at both ends of each first refrigerant flow path group, and both ends in the penetrating direction are closed, and the second communication hole is formed by each second refrigerant flow path group. Are formed at both ends thereof, and both ends in the penetrating direction are closed, and the main body is formed as a hole penetrating the main body in the parallel direction of the plurality of first communicating holes, and communicated with the plurality of first communicating holes. A first collecting hole and a second collecting hole that is formed as a hole penetrating the main body in the parallel direction of the plurality of second communication holes and communicates with the plurality of second communication holes. The refrigerant flows into one of the first collecting holes formed at both ends of the one refrigerant path, flows through the first refrigerant flow path, flows out to the outside through the other first collecting hole, and the second refrigerant The refrigerant flows into one of the second collecting holes formed at both ends of the two refrigerant paths, flows through the second refrigerant flow path, and flows out to the outside through the other second collecting hole .

  According to the present invention, since the first communication hole and the second communication hole are provided in the heat exchanger, it is not necessary to provide separate header pipes for connection to the first refrigerant path and the second refrigerant path. The heat exchanger can be made compact and the manufacturing process can be simplified.

It is a structure figure of the heat exchanger 8 which concerns on Embodiment 1 of this invention. It is a structural diagram of the heat exchanger 8a according to Embodiment 2 of the present invention. It is a structural diagram of the heat exchanger 8b which concerns on Embodiment 3 of this invention. It is a structural diagram of the heat exchanger 8c according to Embodiment 4 of the present invention. It is a structural diagram of the heat exchanger 8d which concerns on Embodiment 5 of this invention. It is a refrigerant circuit figure which shows an example of the refrigerating-cycle apparatus which concerns on Embodiment 6 of this invention. It is a refrigerant circuit diagram which shows an example of the refrigeration cycle apparatus which concerns on Embodiment 7 of this invention. It is a refrigerant circuit figure which shows an example of the refrigerating-cycle apparatus which concerns on Embodiment 8 of this invention.

Embodiment 1 FIG.
(Configuration of heat exchanger 8)
FIG. 1 is a structural diagram of a heat exchanger 8 according to Embodiment 1 of the present invention. Among these, Fig.1 (a) is a perspective view of the heat exchanger 8, FIG.1 (b) is a top view seen from the arrow A direction of Fig.1 (a), and FIG. (c) is the side view seen from the arrow B direction of Fig.1 (a).
As shown in FIG. 1, the main body 10 of the heat exchanger 8 according to the present embodiment has a plurality of first refrigerant flow paths 1 a through which a first refrigerant (for example, high-temperature refrigerant) circulates in a line in the longitudinal direction. The 1st refrigerant | coolant path | pass 1 formed so that it might penetrate to was comprised. A plurality of second refrigerant flow paths 2a through which a second refrigerant (for example, a low-temperature refrigerant) flows are arranged in a row and penetrated in the longitudinal direction so as to be adjacent to the first refrigerant flow paths 1a of the first refrigerant path 1. The 2nd refrigerant | coolant path | pass 2 formed so that is comprised is comprised. Therefore, the first refrigerant path 1 and the second refrigerant path 2 are integrally formed in the main body 10. The main body 10 in which the first refrigerant path 1 and the second refrigerant path 2 are formed is formed of, for example, aluminum or an aluminum alloy, copper or a copper alloy, or steel or a stainless alloy, and is formed by extrusion or pultrusion molding. Manufactured.

  A first inlet communication hole 3a that communicates with all the first refrigerant flow paths 1a is formed in one of both ends of the main body 10 in the refrigerant flow direction along the arrangement direction of the first refrigerant flow paths 1a. . On the other hand, first outlet communication holes 4a communicating with all the first refrigerant flow paths 1a are formed along the direction in which the first refrigerant flow paths 1a are arranged.

  Further, on both sides of the main body 10 in the refrigerant flow direction, the side where the first outlet communication holes 4a are formed communicates with all the second refrigerant flow paths 2a along the arrangement direction of the second refrigerant flow paths 2a. A second inlet communication hole 5a is formed. Further, on the side where the first inlet communication hole 3a is formed in both ends of the refrigerant flow direction of the main body 10, all the second refrigerant flow paths 2a communicate with each other along the arrangement direction of the second refrigerant flow paths 2a. A second outlet communication hole 6a is formed.

  The first inlet communication hole 3a and the second outlet communication hole 6a are formed so as to be slightly shifted in the refrigerant flow direction of the first refrigerant flow path 1a (or the second refrigerant flow path 2a). Further, the first outlet communication hole 4a and the second inlet communication hole 5a are formed with a slight shift in the refrigerant flow direction of the first refrigerant flow path 1a (or the second refrigerant flow path 2a).

  In addition, the penetration direction of the 1st inlet communicating hole 3a and the 1st outlet communicating hole 4a does not necessarily need to be perpendicular | vertical to the direction of each 1st refrigerant | coolant flow path 1a. Further, the penetrating direction of the second inlet communication hole 5a and the second outlet communication hole 6a is not necessarily perpendicular to the direction of the second refrigerant flow path 2a.

One end of the first inlet communication hole 3a, the first outlet communication hole 4a, the second inlet communication hole 5a, and the second outlet communication hole 6a is opened, and the first inlet connection so as to communicate with the outside. The pipe 3, the first outlet connecting pipe 4, the second inlet connecting pipe 5 and the second outlet connecting pipe 6 are connected. The other ends of the first inlet communication hole 3a, the first outlet communication hole 4a, the second inlet communication hole 5a, and the second outlet communication hole 6a are closed by a sealing member or the like.
In addition, as shown in FIG. 1, with respect to the first inlet communication hole 3a, the first outlet communication hole 4a, the second inlet communication hole 5a, and the second outlet communication hole 6a, the end portions that are opened (or closed) are: Although all are on the same side, the present invention is not limited to this, and it is not necessary to be on the same side as long as one end is opened in each communication hole and the other end is closed.

  Moreover, both ends of the plurality of first refrigerant flow paths 1a and second refrigerant flow paths 2a formed so as to penetrate in the longitudinal direction of the main body 10 are sealed by pinching or the like, or sealed by a sealing member (Not shown).

  The first inlet communication hole 3a and the first outlet communication hole 4a correspond to the “first communication hole” in the present invention, and the second inlet communication hole 5a and the second inlet communication hole 6a are the “first communication hole” in the present invention. Corresponds to “2 communication holes”.

(Heat exchange operation of the heat exchanger 8)
Next, the heat exchange operation between the first refrigerant and the second refrigerant in the heat exchanger 8 will be described with reference to FIG.

  The first refrigerant flows into the first inlet communication hole 3a through the first inlet connection pipe 3, flows in the order of the first refrigerant path 1, and then the first outlet communication hole 4a, and the first outlet connection pipe 4 Spill from. On the other hand, the second refrigerant flows into the second inlet communication hole 5a via the second inlet connection pipe 5, flows in the order of the second refrigerant path 2, and then the second outlet communication hole 6a, and is connected to the second outlet connection. It flows out from the pipe 6. At that time, heat exchange is performed between the first refrigerant flowing through the first refrigerant path 1 and the second refrigerant flowing through the second refrigerant path 2 in a counterflow through a partition between the refrigerant paths.

(Effect of Embodiment 1)
Since the first refrigerant path 1 and the second refrigerant path 2 are integrally formed in the main body 10 as in the configuration of the heat exchanger 8 described above, the pipe through which the first refrigerant circulates and the second refrigerant circulates. The thermal resistance generated at the joint surface when the tube is formed separately is suppressed, and the heat exchange performance can be improved.

  Further, since the first inlet communication hole 3a and the first outlet communication hole 4a are provided inside the main body 10 of the heat exchanger 8, it is not necessary to provide a separate header pipe for connecting to the first refrigerant path 1. The heat exchanger 8 can be made compact and the manufacturing process can be simplified. The same applies to the second inlet communication hole 5a and the second outlet communication hole 6a for the second refrigerant path 2.

  Furthermore, since the first inlet communication hole 3a and the second outlet communication hole 6a, as well as the first outlet communication hole 4a and the second inlet communication hole 5a are formed slightly shifted in the flow direction of each refrigerant, Since the distance between the adjacent first refrigerant path 1 and the second refrigerant path 2 can be reduced as compared with the case where they are not shifted, the heat exchanger 8 can be made compact.

  As shown in FIG. 1, the cross-sectional shapes of the first refrigerant flow path 1a and the second refrigerant flow path 2a are rectangular, but the present invention is not limited to this, and any polygon can be used. In order to improve the pressure resistance, it may be circular, or may be a long hole or an ellipse. In this case, it goes without saying that the flow path cross section of the first refrigerant flow path 1a and the flow path cross section of the second refrigerant flow path 2a need not have the same shape. Furthermore, in order to improve the heat transfer performance, a groove may be provided on the inner surface of the refrigerant flow path to increase the heat transfer area. In this case, if the groove is processed at the same time as the extrusion of the heat exchanger 8 and the pultrusion molding, the manufacturing operation can be simplified.

  Further, as shown in FIG. 1, the same number of refrigerant flow paths are provided in the first refrigerant path 1 and the second refrigerant path 2, but the present invention is not limited to this. That is, the numbers may be different from each other so that the heat exchanger 8 has a high heat transfer performance, a low pressure loss, and a suitable heat exchanger according to the operating condition or fluid property value of the refrigerant in the heat exchanger 8.

  Further, as shown in FIG. 1, the first refrigerant path 1 and the second refrigerant path 2 are integrally formed in the main body 10, but the present invention is not limited to this. That is, even when the first refrigerant path 1 and the second refrigerant path 2 are separate pipes and both are joined by brazing or the like, the first inlet communication is connected to the pipe in which the first refrigerant path 1 is formed. If the hole 3a and the first outlet communication hole 4a are provided, it is not necessary to provide a separate header pipe for connecting the refrigerant flow path of the first refrigerant path 1, so that the heat exchanger can be made compact, The manufacturing process can be simplified. The same applies to the case where the second inlet communication hole 5a and the second outlet communication hole 6a are provided in the pipe in which the second refrigerant path 2 is formed.

  The first inlet connection pipe 3 and the first outlet connection pipe 4 are respectively connected to the first inlet communication hole 3a and the first outlet communication hole 4a from the first inlet communication hole 3a to the first outlet communication hole 4a. You may make it comprise by inserting the pipe in which opening parts, such as a slit opened only in the direction which goes to only the direction which goes to the 1st exit communication hole 3a from the 1st exit communication hole 4a. Thus, when both ends of the plurality of first refrigerant flow paths 1a and the second refrigerant flow paths 2a are sealed with a sealing member or the like by brazing or the like, an extra sealing member enters and the refrigerant flow paths Can be suppressed and manufacturing variation can be suppressed. About this, the same effect can be acquired also in the 2nd inlet connecting pipe 5 and the 2nd outlet connecting pipe 6 if it is set as the same structure.

  Moreover, although the 1st refrigerant | coolant which distribute | circulates the 1st refrigerant | coolant path | pass 1 and the 2nd refrigerant | coolant which distribute | circulates the 2nd refrigerant | coolant path | pass 2 shall be heat-exchanged by counterflow, it is not limited to this Alternatively, heat exchange may be performed as a parallel flow. For example, if the first refrigerant flows in from the first inlet connecting pipe 3 and the second refrigerant flows in from the second outlet connecting pipe 6, the first refrigerant and the second refrigerant become parallel flows.

Embodiment 2. FIG.
The heat exchanger 8a according to the present embodiment will be described focusing on differences from the configuration and operation of the heat exchanger 8 according to the first embodiment.

(Configuration of heat exchanger 8a)
FIG. 2 is a structural diagram of a heat exchanger 8a according to Embodiment 2 of the present invention.
As shown in FIG. 2, in the main body 10 of the heat exchanger 8a according to the present embodiment, the first refrigerant path 1 through which the first refrigerant flows includes a plurality of first refrigerant flow paths 1a arranged in a line. The plurality of first refrigerant flow paths 1b are arranged in a row so as to be adjacent to the first refrigerant flow path 1a. The second refrigerant path 2 through which the second refrigerant flows includes a plurality of second refrigerant flow paths 2a arranged in a line and a plurality of second refrigerant flow paths 2b adjacent to the second refrigerant flow paths 2a. Are arranged in a row. That is, each of the first refrigerant path 1 and the second refrigerant path 2 is constituted by two sets of refrigerant flow paths, and as shown in FIG. 2, the first refrigerant flow path 1b in the first refrigerant path 1 and The second refrigerant flow path 2a in the second refrigerant path 2 is adjacent.

  All the first refrigerant flow paths 1a and the first refrigerant flow paths are arranged at one of both ends of the main body 10 in the refrigerant flow direction along the arrangement direction of the first refrigerant flow paths 1a (first refrigerant flow paths 1b). A first inlet communication hole 3a is formed so as to communicate with 1b. On the other hand, the first refrigerant flow paths 1a (first refrigerant flow paths 1b) are communicated with all the second refrigerant flow paths 2a and the second refrigerant flow paths 2b along the alignment direction of the first refrigerant flow paths 1a (first refrigerant flow paths 1b). An outlet communication hole 4a is formed.

  Furthermore, on the side where the first outlet communication hole 4a is formed on both ends of the main body 10 in the refrigerant flow direction, all the second refrigerant flow paths 2a (second refrigerant flow paths 2b) are arranged along the arrangement direction of the respective second refrigerant flow paths 2a. A second inlet communication hole 5a is formed so as to communicate with the second refrigerant channel 2a and the second refrigerant channel 2b. Further, on both sides of the refrigerant flow direction of the main body 10 on the side where the first inlet communication hole 3a is formed, all the two refrigerant flow paths 2a (second refrigerant flow paths 2b) are arranged along the arrangement direction of the second refrigerant flow paths 2a (second refrigerant flow paths 2b). A second outlet communication hole 6a is formed so as to communicate with the second refrigerant channel 2a and the second refrigerant channel 2b.

  In addition, both ends of the plurality of first refrigerant flow paths 1a, first refrigerant flow paths 1b, second refrigerant flow paths 2a, and second refrigerant flow paths 2b formed through the body 10 in the longitudinal direction are pinched. It is sealed (not shown) by a sealing process or the like by a sealing member.

(Heat exchange operation of the heat exchanger 8a)
Next, the heat exchange operation between the first refrigerant and the second refrigerant in the heat exchanger 8a will be described with reference to FIG.

  The first refrigerant flows into the first inlet communication hole 3a through the first inlet connection pipe 3, flows through the first refrigerant flow path 1a and the first refrigerant flow path 1b constituting the first refrigerant path 1, and Then, it flows through the first outlet communication hole 4 a and flows out from the first outlet connection pipe 4. On the other hand, the second refrigerant flows into the second inlet communication hole 5a through the second inlet connection pipe 5, and flows through the second refrigerant flow path 2a and the second refrigerant flow path 2b constituting the second refrigerant path 2. Furthermore, it flows through the second outlet communication hole 6 a and flows out from the second outlet connecting pipe 6. At that time, the first refrigerant flowing through the first refrigerant flow path 1a and the first refrigerant flow path 1b, and the second refrigerant flowing through the second refrigerant flow path 2a and the second refrigerant flow path 2b are the first refrigerant flow. Heat exchange is performed in a counterflow through a partition wall between the path 1b and the second refrigerant flow path 2a.

(Effect of Embodiment 2)
In the heat exchanger 8a described above, in addition to the effects of the heat exchanger 8 according to Embodiment 1, each refrigerant flow path is also formed when each refrigerant path is configured by a plurality of sets of refrigerant flow paths. Since it is comprised integrally, the thermal resistance which generate | occur | produces when each is comprised separately is suppressed, and heat exchange performance can be improved.

  In addition, each refrigerant path is constituted by two sets of refrigerant flow paths, and these refrigerant flow paths are integrated by one communication hole, so the number of communication holes can be reduced, and the manufacturing process of the heat exchanger 8a can be simplified. Can be planned.

  In addition, since one communication hole is formed in order to consolidate the two sets of refrigerant flow paths, the distance between the two sets of refrigerant flow paths in each refrigerant path can be reduced, and the heat exchanger 8a can be made compact. Can be planned.

  Further, since each refrigerant path is constituted by two sets of refrigerant flow paths, the heat exchange capacity can be increased.

  As shown in FIG. 2, the number of the first refrigerant flow path 1a, the first refrigerant flow path 1b, the second refrigerant flow path 2a, and the second refrigerant flow path 2b is the same, but it is limited to this. It is not a thing. That is, the numbers may be different from each other so that the heat exchanger performance is high, the pressure loss is low, and a suitable heat exchanger is obtained in accordance with the operating condition or flow characteristic value of the refrigerant in the heat exchanger 8a.

  Further, as shown in FIG. 2, each refrigerant path is composed of two sets of refrigerant flow paths (for example, the first refrigerant flow path 1b and the first refrigerant flow path 1b in the case of the first refrigerant path 1). However, the present invention is not limited to this. That is, when the heat exchange capacity is increased, or when the flow path area is increased to reduce the pressure loss, each refrigerant path may be constituted by three or more sets of refrigerant flow paths. Further, it is not necessary that the number of sets of refrigerant flow paths in the first refrigerant path 1 and the number of sets of refrigerant flow paths in the second refrigerant path 2 are the same.

  Further, similarly to the first embodiment, the first inlet communication hole 3a and the second outlet communication hole 6a may be formed so as to be shifted in the flow direction of the first refrigerant path 1 (or the second refrigerant path 2). . The same applies to the first outlet communication hole 4a and the second inlet communication hole 5b. As a result, the distance between the adjacent first refrigerant path 1 and the second refrigerant path 2 (the distance between the first refrigerant flow path 1b and the second refrigerant flow path 2a in FIG. 2) can be reduced. The exchanger 8a can be made compact.

Embodiment 3 FIG.
The heat exchanger 8b according to the present embodiment will be described focusing on differences from the configuration and operation of the heat exchanger 8 according to the first embodiment.

(Configuration of heat exchanger 8b)
FIG. 3 is a structural diagram of a heat exchanger 8b according to Embodiment 3 of the present invention. Among these, Fig.3 (a) is a perspective view of the heat exchanger 8b, FIG.3 (b) is a top view seen from the arrow A direction of Fig.3 (a), and FIG. c) is a side view seen from the direction of arrow B in FIG.
As shown in FIG. 3, in the main body 10 of the heat exchanger 8b according to the present embodiment, the first refrigerant path 1 through which the first refrigerant flows has a plurality of first refrigerant flow paths 1a arranged in a line. And a plurality of first refrigerant flow paths 1b arranged in a line. The second refrigerant path 2 through which the second refrigerant flows is composed of a plurality of second refrigerant flow paths 2a arranged in a line and a plurality of second refrigerant flow paths 2b arranged in a line. . Further, the row of the refrigerant flow paths of the first refrigerant path 1 and the row of the refrigerant flow paths of the second refrigerant path 2 are alternately arranged every other row. Specifically, when viewed from the direction of arrow B in FIG. 3A, the first refrigerant channel 1a, the second refrigerant channel 2a, the first refrigerant channel 1b, and the second refrigerant channel from the top. They are arranged in the order of 2b.

  A first inlet communication hole 3a is formed at one of both ends of the main body 10 in the refrigerant flow direction so as to communicate with all the first refrigerant flow paths 1a along the arrangement direction of the first refrigerant flow paths 1a. In addition, first inlet communication holes 3b are formed along the direction in which the first refrigerant flow paths 1b are arranged so as to communicate with all the first refrigerant flow paths 1b. Further, on the other side, first outlet communication holes 4a are formed so as to communicate with all the first refrigerant flow paths 1a along the arrangement direction of the first refrigerant flow paths 1a. A first outlet communication hole 4b is formed along the direction in which the refrigerant flow paths 1b are arranged so as to communicate with all the first refrigerant flow paths 1b.

  Furthermore, on the side where the first outlet communication hole 4a and the first outlet communication hole 4b are formed on both ends in the refrigerant flow direction of the main body 10, all the second refrigerant flow paths 2a are arranged along the arrangement direction of the second refrigerant flow paths 2a. The second inlet communication hole 5a is formed so as to communicate with the two refrigerant flow paths 2a, and communicates with all the second refrigerant flow paths 2b along the arrangement direction of the second refrigerant flow paths 2b. A second inlet communication hole 5b is formed in the upper part. On the other hand, second outlet communication holes 6a are formed so as to communicate with all the second refrigerant flow paths 2a along the arrangement direction of the second refrigerant flow paths 2a. A second outlet communication hole 6b is formed along the direction in which the refrigerant flow paths 2b are arranged so as to communicate with all the second refrigerant flow paths 2b.

  Note that, as shown in FIG. 3, the penetration direction of the first inlet communication hole 3a and the first outlet communication hole 4a is not necessarily perpendicular to the direction of each first refrigerant flow path 1a. The penetrating direction of the inlet communication hole 3b and the first outlet communication hole 4b is not necessarily perpendicular to the direction of each first refrigerant channel 1b. The same applies to the penetrating direction of the second inlet communication hole 5a and the second inlet communication hole 5b, and the second outlet communication hole 6a and the second outlet communication hole 6b.

  The first inlet communication hole 3a, the first inlet communication hole 3b, the first outlet communication hole 4a, the first outlet communication hole 4b, the second inlet communication hole 5a, the second inlet communication hole 5b, and the second outlet communication hole 6a. The second outlet communication hole 6b is closed at both ends by a sealing member or the like.

  In addition, both ends of the plurality of first refrigerant flow paths 1a, first refrigerant flow paths 1b, second refrigerant flow paths 2a, and second refrigerant flow paths 2b formed through the body 10 in the longitudinal direction are pinched. It is sealed (not shown) by a sealing process or the like by a sealing member.

A first inlet collecting hole 31 is formed so as to communicate with both of the first inlet communication hole 3a and the first inlet communication hole 3b along the arrangement direction of the first inlet communication hole 3a. A first outlet collection hole 41 is formed along the direction in which the first outlet communication holes 4b are arranged so as to communicate with both of them. The second inlet communication hole 5a and the second inlet communication hole 5b are arranged along the direction of arrangement of the second inlet communication hole 5b so as to communicate with both of them, and the second outlet communication hole 6a and A second outlet collecting hole 61 is formed along the direction in which the second outlet communicating holes 6b are arranged so as to communicate with both of them.
3A, when viewed from the direction of arrow A (plan view), the first inlet collecting hole 31, the first outlet collecting hole 41, the second inlet collecting hole 51, and the second outlet collecting hole 61 are all. Although formed on the same side (the right side in FIG. 3B), it is not limited to this. That is, for example, the first inlet collecting hole 31 may be formed at any position as long as the first inlet communicating hole 3a and the first inlet communicating hole 3b are aligned with each other. Further, as shown in FIG. 3A, the penetration direction of the first inlet collecting hole 31 is not necessarily perpendicular to the penetration direction of the first inlet communication hole 3a and the first inlet communication hole 3b. . The same applies to the first outlet collecting hole 41, the second inlet collecting hole 51, and the second outlet collecting hole 61.

In addition, one end of the first inlet collecting hole 31, the first outlet collecting hole 41, the second inlet collecting hole 51, and the second outlet collecting hole 61 is opened, and the first inlet connection is made so as to communicate with the outside. The pipe 3, the first outlet connecting pipe 4, the second inlet connecting pipe 5 and the second outlet connecting pipe 6 are connected. The other ends of the first inlet collecting hole 31, the first outlet collecting hole 41, the second inlet collecting hole 51, and the second outlet collecting hole 61 are closed by a sealing member or the like.
As shown in FIG. 3, with respect to the first inlet collecting hole 31, the first outlet collecting hole 41, the second inlet collecting hole 51, and the second outlet collecting hole 61, the end portions that are opened (or closed) are These are all on the same side, but the present invention is not limited to this, and it is not necessary to be on the same side as long as one end is opened in each collecting hole and the other end is closed.

  The first inlet communication hole 3a, the first inlet communication hole 3b, the first outlet communication hole 4a, and the first outlet communication hole 4b correspond to the “first communication hole” of the present invention, and the second inlet communication hole 5a. The second inlet communication hole 5b, the second outlet communication hole 6a, and the second outlet communication hole 6b correspond to the “second communication hole” of the present invention. The first inlet collecting hole 31 and the first outlet collecting hole 41 correspond to the “first collecting hole” of the present invention, and the second inlet collecting hole 51 and the second outlet collecting hole 61 of the present invention are the “first collecting hole”. Corresponds to “2 holes”.

(Heat exchange operation of the heat exchanger 8b)
Next, the heat exchange operation between the first refrigerant and the second refrigerant in the heat exchanger 8b will be described with reference to FIG.

  The first refrigerant flows into the first inlet collecting hole 31 through the first inlet connecting pipe 3, and flows into the first inlet communication hole 3a and the first inlet communication hole 3b. The first refrigerant flowing into the first inlet communication hole 3a flows through the first refrigerant channel 1a and flows out to the first outlet communication hole 4a. Moreover, the 1st refrigerant | coolant which flowed into the 1st inlet communication hole 3b distribute | circulates the 1st refrigerant | coolant flow path 1b, and flows out into the 1st exit communication hole 4b. Then, the first refrigerant that has flowed into the first outlet communication hole 4 a and the first outlet communication hole 4 b merges at the first outlet collecting hole 41 and flows out from the first outlet connection pipe 4.

  On the other hand, the second refrigerant flows into the second inlet collecting hole 51 via the second inlet connecting pipe 5, and flows into the second inlet communication hole 5a and the second inlet communication hole 5b, respectively. The second refrigerant flowing into the second inlet communication hole 5a flows through the second refrigerant channel 2a and flows out to the second outlet communication hole 6a. Further, the second refrigerant flowing into the second inlet communication hole 5b flows through the second refrigerant flow path 2b and flows out to the second outlet communication hole 6b. Then, the second refrigerant that has flowed out into the second outlet communication hole 6 a and the second outlet communication hole 6 b merges in the second outlet collecting hole 61 and flows out from the second outlet connection pipe 6.

  The first refrigerant flowing through the first refrigerant flow path 1a and the first refrigerant flow path 1b and the second refrigerant flowing through the second refrigerant flow path 2a and the second refrigerant flow path 2b are between the respective refrigerant flow paths. Heat exchange is performed in a counterflow through the partition.

(Effect of Embodiment 3)
In the heat exchanger 8b described above, in addition to the effects of the heat exchanger 8 according to Embodiment 1, each refrigerant flow path is integrated even when each refrigerant path is constituted by two sets of refrigerant flow paths. Therefore, the heat resistance generated in the case of being configured separately is suppressed, and the heat exchange performance can be improved.

  Further, since the first inlet collecting hole 31 and the first outlet collecting hole 41 are provided in the main body 10 of the heat exchanger 8b, the first inlet communicating hole 3a, the first inlet communicating hole 3b, and the first outlet communicating hole are provided. It is not necessary to provide a separate header pipe for connecting to 4a and the first outlet communication hole 4b. Therefore, the heat exchanger 8b can be made compact and the manufacturing process can be simplified. The same applies to the second inlet collecting hole 51 and the second outlet collecting hole 61.

  In addition, each refrigerant path is constituted by two sets of refrigerant flow paths, and these refrigerant flow paths are collected by one communication hole, so the number of communication holes can be reduced, and the manufacturing process of the heat exchanger 8b can be simplified. Can be planned.

  Further, since each refrigerant path is constituted by two sets of refrigerant flow paths, the heat exchange capacity can be increased.

  Further, the heat exchanger 8b according to the present embodiment includes the first refrigerant path 1 and the second refrigerant path 2 that are configured by two sets of refrigerant flow paths, like the heat exchanger 8a according to the second embodiment. Instead of the adjacent configuration, the rows of the refrigerant flow paths of the first refrigerant path 1 and the rows of the refrigerant flow paths of the second refrigerant path 2 are alternately arranged every other row. As a result, the refrigerant flowing through each set of refrigerant flow paths and the refrigerant flowing through another set of refrigerant flow paths adjacent thereto are different from each other, and thus the heat exchanger 8a according to the second embodiment. As a result, the heat exchange performance is further improved.

  As shown in FIG. 3, the first refrigerant path 1 and the second refrigerant path 2 are integrally formed in the main body 10. However, the present invention is not limited to this. That is, even when the first refrigerant path 1 and the second refrigerant path 2 are separate pipes and both are joined by brazing or the like, the first inlet communication is connected to the pipe in which the first refrigerant path 1 is formed. If the hole 3a, the first inlet communication hole 3b, the first outlet communication hole 4a, and the first outlet communication hole 4b are provided, it is necessary to provide a separate header pipe for connecting the refrigerant flow path of the first refrigerant path 1. Therefore, the heat exchanger can be made compact and the manufacturing process can be simplified. The same applies to the case where the second inlet communication hole 5a, the second inlet communication hole 5b, the second outlet communication hole 6a, and the second outlet communication hole 6b are provided in the pipe in which the second refrigerant path 2 is formed. I can say.

  Further, as shown in FIG. 3, each refrigerant path is composed of two sets of refrigerant flow paths (for example, if the first refrigerant path 1 is used, the first refrigerant flow path 1a and the first refrigerant flow path 1b However, the present invention is not limited to this. That is, when the heat exchange capacity is increased, or when the flow path area is increased to reduce the pressure loss, each refrigerant path may be constituted by three or more sets of refrigerant flow paths. Further, it is not necessary that the number of sets of refrigerant flow paths in the first refrigerant path 1 and the number of sets of refrigerant flow paths in the second refrigerant path 2 are the same.

Embodiment 4 FIG.
The heat exchanger 8c according to the present embodiment will be described focusing on differences from the configuration and operation of the heat exchanger 8 according to the first embodiment.

(Configuration of heat exchanger 8c)
FIG. 4 is a structural diagram of a heat exchanger 8c according to Embodiment 4 of the present invention.
As shown in FIG. 4, a part of both ends of the main body 10 of the heat exchanger 8 c according to the present embodiment in the refrigerant flow direction has a part along the arrangement direction of the first refrigerant flow paths 1 a. A first inlet communication hole 3aa communicating with the first refrigerant flow path 1a (hereinafter referred to as “first first refrigerant flow path group”) is formed. Further, a first inlet communication hole 3ab communicating with the remaining first refrigerant flow path 1a is formed.
On the other hand, all the first refrigerant flow paths 1a communicating with the first inlet communication holes 3aa in the first refrigerant flow paths 1a along the direction in which the first refrigerant flow paths 1a are arranged, and the first A first outlet communication hole 4aa communicating with a part of the first refrigerant flow path 1a (hereinafter referred to as “second first refrigerant flow path group”) communicating with the inlet communication hole 3ab is formed. Further, a first outlet communication hole 4ab communicating with the remaining first refrigerant flow path 1a (hereinafter referred to as “third first refrigerant flow path group”) communicating with the first inlet communication hole 3ab is formed.

Furthermore, on the side where the first outlet communication hole 4aa and the first outlet communication hole 4ab are formed in both ends of the main body 10 in the refrigerant flow direction, a part of the second refrigerant flow path 2a is arranged along the arrangement direction. A second inlet communication hole 5ab communicating with the second refrigerant channel 2a (hereinafter referred to as “first second refrigerant channel group”) is formed. Further, a second inlet communication hole 5aa communicating with the remaining second refrigerant flow path 2a is formed.
In addition, the second refrigerant is disposed along the direction in which the second refrigerant flow paths 2a are arranged on the side where the first inlet communication hole 3aa and the first inlet communication hole 3ab are formed in both ends of the main body 10 in the refrigerant flow direction. Of the flow paths 2a, all the second refrigerant flow paths 2a communicating with the second inlet communication holes 5ab and a part of the second refrigerant flow paths 2a (hereinafter referred to as "second flow paths") communicating with the second inlet communication holes 5aa. A second outlet communication hole 6ab communicating with the “second refrigerant flow path group” is formed. In addition, a second outlet communication hole 6aa communicating with the remaining second refrigerant flow path 2a (hereinafter referred to as “third second refrigerant flow path group”) communicating with the second inlet communication hole 5aa is formed.

  In addition, the “second first refrigerant flow path group” is adjacent to the “third second refrigerant flow path group”, and the “second first refrigerant flow path group” is the “second second refrigerant flow path group”. The “third refrigerant channel group” is formed adjacent to the “second refrigerant channel group”, and the “third first refrigerant channel group” is formed adjacent to the “second refrigerant channel group”.

  The first inlet communication hole 3aa and the first inlet communication hole 3ab and the second outlet communication hole 6aa and the second outlet communication hole 6ab are the refrigerant in the first refrigerant channel 1a (or the second refrigerant channel 2a). It is formed with a slight shift in the distribution direction. Further, the first outlet communication hole 4aa and the first outlet communication hole 4ab, and the second inlet communication hole 5aa and the second inlet communication hole 5ab are the refrigerant in the first refrigerant channel 1a (or the second refrigerant channel 2a). It is formed with a slight shift in the distribution direction.

Note that the first inlet communication hole 3aa and the first inlet communication hole 3ab, and the first outlet communication hole 4aa and the first outlet communication hole 4ab are not necessarily perpendicular to the direction of each first refrigerant flow path 1a. There is no. Further, the second inlet communication hole 5aa and the second inlet communication hole 5ab, and the second outlet communication hole 6aa and the second outlet communication hole 6ab need to be perpendicular to the direction of each second refrigerant flow path 2a. There is no.
In addition, as shown in FIG. 4, the first inlet communication hole 3aa and the first inlet communication hole 3ab are formed in the same direction and coaxial, but are not necessarily in the same direction or coaxial. It doesn't have to be. The same applies to the first outlet communication hole 4aa and the first outlet communication hole 4ab, the second inlet communication hole 5aa and the second inlet communication hole 5ab, and the second outlet communication hole 6aa and the second outlet communication hole 6ab. is there.

  Also, one end of the first inlet communication hole 3aa, the first outlet communication hole 4ab, the second inlet communication hole 5ab, and the second outlet communication hole 6aa is opened, and the first inlet connection is made so as to communicate with the outside. A pipe 3, a first outlet connecting pipe 4, a second inlet connecting pipe 5 (not shown in FIG. 4 for the back side of the first outlet connecting pipe 4) and a second outlet connecting pipe 6 are connected.

  The first inlet communication hole 3aa corresponds to the “first divided communication hole inflow portion” of the present invention, and the first inlet communication hole 3ab and the first outlet communication hole 4aa are the “first divided communication hole” of the present invention. The first outlet communication hole 4ab corresponds to the “folded portion” and corresponds to the “first divided communication hole outflow portion” of the present invention. The second inlet communication hole 5ab corresponds to the “second divided communication hole inflow portion” of the present invention, and the second inlet communication hole 5aa and the second outlet communication hole 6ab are the “second divided communication hole of the present invention. The second outlet communication hole 6aa corresponds to the “folded portion”, and corresponds to the “second divided communication hole outflow portion” of the present invention.

(Heat exchange operation of the heat exchanger 8c)
Next, the heat exchange operation between the first refrigerant and the second refrigerant in the heat exchanger 8c will be described with reference to FIG.

  The first refrigerant flows into the first inlet communication hole 3aa via the first inlet connection pipe 3, and the first refrigerant channel 1a, the first outlet communication hole 4aa, the first refrigerant channel 1a, and the first inlet communication again. It flows through the hole 3ab, the first refrigerant flow path 1a, and the first outlet communication hole 4ab in this order, and flows out from the first outlet connecting pipe 4. On the other hand, the second refrigerant flows into the second inlet communication hole 5ab via the second inlet connection pipe 5, and then the second refrigerant flow path 2a, the second outlet communication hole 6ab, the second refrigerant flow path 2a, and the second refrigerant flow path again. It flows in the order of the inlet communication hole 5aa, the second refrigerant flow path 2a, and the second outlet communication hole 6aa again, and then flows out from the second outlet connection pipe 6. At that time, the first refrigerant and the second refrigerant exchange heat with each other through a partition wall between the refrigerant paths.

(Effect of Embodiment 4)
In the heat exchanger 8c described above, in addition to the effects of the heat exchanger 8 according to Embodiment 1, in order to maximize the heat exchange performance according to the operating conditions and physical property values of each refrigerant, When the cross-sectional area is small and the refrigerant circulation path is lengthened, the refrigerant circulation path can be folded inside, so that the heat exchange performance can be maximized while suppressing the size of the heat exchanger 8c.

  Further, since the first inlet communication hole 3aa and the like for turning the refrigerant flow path are formed inside the main body 10 of the heat exchanger 8c, it is not necessary to provide a separate pipe, and the heat exchanger 8c is compact. Can be achieved.

  In the heat exchanger 8c according to the present embodiment, the flow operation of the first refrigerant and the second refrigerant has been described as both flowing back. However, the present invention is not limited to this, and one refrigerant is folded back. The other refrigerant may flow linearly as in the first embodiment. In this case, which refrigerant is to be turned back and forth is determined according to the operating conditions and physical properties of the respective refrigerants in the heat exchanger, heat transfer performance is high, pressure loss is low, and a suitable heat exchanger It may be selected so that

  Further, the configurations of the first inlet communication hole 3aa and the first inlet communication hole 3ab, and the first outlet communication hole 4aa and the first outlet communication hole 4ab are the same as described above, and the second inlet communication hole 5aa and the second inlet are maintained. The configuration of the communication hole 5ab, the second outlet communication hole 6aa, and the second outlet communication hole 6ab may be as follows. However, the positional relationship between the first inlet communication hole 3aa and the first inlet communication hole 3ab, the second outlet communication hole 6aa and the second outlet communication hole 6ab, and the first outlet communication hole 4aa and the first outlet communication hole 4ab. The positional relationship between the second inlet communication hole 5aa and the second inlet communication hole 5ab is the same as that shown in FIG. That is, on the side where the first outlet communication hole 4aa and the first outlet communication hole 4ab are formed in both ends of the main body 10 in the refrigerant flow direction, a part of the second refrigerant flow path 2a is arranged along the arrangement direction of the second refrigerant flow paths 2a. The second inlet communication hole 5aa is formed so as to communicate with the second refrigerant flow path 2a (corresponding to the above-mentioned “third second refrigerant flow path group”). Further, the second inlet communication hole 5ab is formed so as to communicate with the remaining second refrigerant flow path 2a. And the 2nd refrigerant | coolant is along the arrangement direction of each 2nd refrigerant | coolant flow path 2a in the side in which the 1st inlet communication hole 3aa and the 1st inlet communication hole 3ab were formed among the both ends of the refrigerant | coolant distribution direction of the main body 10. Of the flow passages 2a, all the second refrigerant flow passages 2a communicating with the second inlet communication holes 5aa and a part of the second refrigerant flow passages 2a communicating with the second inlet communication holes 5ab (the above-mentioned “secondary passages”). The second outlet communication hole 6aa is formed so as to communicate with the “second refrigerant flow path group”. Further, the second outlet communication hole 6ab is formed so as to communicate with the remaining second refrigerant flow path 2a (corresponding to the above-mentioned “first second refrigerant flow path group”) communicating with the second inlet communication hole 5ab. . In this case, one end of the second inlet communication hole 5aa and the second outlet communication hole 6ab is opened, and the second inlet connection pipe 5 and the second outlet connection pipe 6 are connected to each other so as to communicate with the outside. Even with the configuration as described above, the first refrigerant and the second refrigerant can be heat-exchanged by the counter flow, and the same effect as the heat exchanger 8c shown in FIG. 4 can be obtained.

  Further, as shown in FIG. 4, the heat exchanger 8c according to the present embodiment divides the communication hole corresponding to the first inlet communication hole 3a of the heat exchanger 8 according to the first embodiment into two parts (first Although the inlet communication hole 3aa and the first inlet communication hole 3ab) are configured (the same applies to the first outlet communication hole 4aa and the first outlet communication hole 4ab), the present invention is not limited to this. That is, it is good also as what is comprised so that the frequency | count of folding | turning of each refrigerant | coolant may be increased as 3 or more divisions. In this case, depending on the mode of division, the two first outlet communication holes 4ab are arranged on one end side in the parallel direction of the first refrigerant flow path 1a, and the first refrigerant flows in or out, respectively. . As a result, the size of the heat exchanger can be kept as it is, and the refrigerant flow path can be further lengthened, so that the heat exchange performance can be further improved.

  Furthermore, the configuration in which the refrigerant flow path is folded back as in the heat exchanger 8c according to the present embodiment can also be applied to the second and third embodiments.

Embodiment 5 FIG.
The heat exchanger 8d according to the present embodiment will be described focusing on differences from the configuration and operation of the heat exchanger 8b according to the third embodiment.

(Configuration of heat exchanger 8d)
FIG. 5 is a structural diagram of a heat exchanger 8d according to Embodiment 5 of the present invention. Among these, Fig.5 (a) is a perspective view of the heat exchanger 8d, FIG.5 (b) is the top view seen from the arrow A direction of Fig.5 (a), and FIG. (c) is the side view seen from the arrow B direction of Fig.5 (a).
As shown in FIG. 5, the first collecting hole 31a is formed so as to communicate with the first inlet communication hole 3a along the direction in which the first inlet communication hole 3a and the first inlet communication hole 3b are arranged. A first collecting hole 31b is formed so as to communicate with the first inlet communication hole 3b. Moreover, the 1st relay gathering hole 41a is formed along the arrangement direction of the 1st exit communicating hole 4a and the 1st exit communicating hole 4b so that it may communicate with both.

  A second relay assembly hole 51a is formed along the direction in which the second inlet communication hole 5a and the second inlet communication hole 5b are arranged so as to communicate with both. A second collecting hole 61a is formed along the direction in which the second outlet communication hole 6a and the second outlet communication hole 6b are arranged so as to communicate with the second outlet communication hole 6a. A second collective hole 61b is formed so as to communicate with the hole 6b.

  In addition, one end of the first collecting hole 31a, the first collecting hole 31b, the second collecting hole 61a, and the second collecting hole 61b is opened, and the first inlet connecting pipe 3 and the second collecting hole 61b are communicated to the outside. The 1 outlet connection pipe 4, the 2nd outlet connection pipe 6, and the 2nd inlet connection pipe 5 are connected. Further, both ends of the first relay assembly hole 41a and the second relay assembly hole 51a are closed by a sealing member or the like. Therefore, the first outlet connection pipe 4 and the second inlet connection pipe 5 are connected to the surface opposite to the one surface of the main body 10 to which the first inlet connection pipe 3 and the second outlet connection pipe 6 are connected.

When viewed from the direction of arrow A in FIG. 5 (plan view), the first collective hole 31a, the first collective hole 31b, the first relay collective hole 41a, the second relay collective hole 51a, the second collective hole 61a, and The second collecting holes 61b are all formed on the same side (right side), but are not limited thereto. That is, for example, the first collecting hole 31a may be formed at any position as long as it communicates with the first inlet communication hole 3a and has an opening to the outside. The same applies to the first collecting hole 31b, the second collecting hole 61a, and the second collecting hole 61b. Further, the first relay collecting hole 41a may be formed at any position as long as the first relay communicating hole 41a is located along the arrangement direction of the first outlet communicating hole 4a and the first outlet communicating hole 4b. The same applies to the second relay assembly hole 51a.
Further, as shown in FIG. 5, the penetration direction of the first relay assembly hole 41a is not necessarily perpendicular to the penetration direction of the first outlet communication hole 4a and the first outlet communication hole 4b. The same applies to the second relay assembly hole 51a.

  The first collecting hole 31a corresponds to the “first collecting hole inflow portion” of the present invention, and the first collecting hole 31b corresponds to the “first collecting hole outflow portion” of the present invention. The second collecting hole 61b corresponds to a “second collecting hole inflow portion” of the present invention, and the second collecting hole 61a corresponds to a “second collecting hole outflow portion” of the present invention.

(Heat exchange operation of the heat exchanger 8d)
Next, the heat exchange operation between the first refrigerant and the second refrigerant in the heat exchanger 8d will be described with reference to FIG.

  The first refrigerant flows into the first collecting hole 31a through the first inlet connection pipe 3, and flows into the first inlet communication hole 3a. The first refrigerant flowing into the first inlet communication hole 3a flows through the first refrigerant channel 1a and flows out to the first outlet communication hole 4a. The 1st refrigerant | coolant which flowed out to the 1st exit communication hole 4a flows out into the 1st exit communication hole 4b via the 1st relay gathering hole 41a. The 1st refrigerant | coolant which flowed out to the 1st exit communication hole 4b distribute | circulates the 1st refrigerant | coolant flow path 1b, and flows out into the 1st inlet communication hole 3b. The 1st refrigerant | coolant which flowed out to the 1st inlet communication hole 3b flows out via the 1st exit connection pipe 4 via the 1st collection hole 31b.

  The second refrigerant flows into the second collecting hole 61b through the second inlet connection pipe 5, and flows into the second outlet communication hole 6b. The second refrigerant flowing into the second outlet communication hole 6b flows through the second refrigerant flow path 2b and flows out to the second inlet communication hole 5b. The second refrigerant that has flowed out into the second inlet communication hole 5b flows into the second inlet communication hole 5a via the second relay collecting hole 51a. The second refrigerant that has flowed out into the second inlet communication hole 5a flows through the second refrigerant flow path 2a and flows out into the second outlet communication hole 6a. The second refrigerant that has flowed out into the second outlet communication hole 6a flows out through the second outlet connecting pipe 6 via the second collecting hole 61a.

  The first refrigerant flowing through the first refrigerant flow path 1a and the second refrigerant flowing through the second refrigerant flow path 2a are heat-exchanged in a counter flow through a partition between the refrigerant flow paths. In addition, the first refrigerant flowing through the first refrigerant flow path 1b and the second refrigerant flowing through the second refrigerant flow path 2b are subjected to heat exchange in a counter flow through a partition wall between the refrigerant flow paths. The Further, the first refrigerant flowing through the first refrigerant flow path 1b and the second refrigerant flowing through the second refrigerant flow path 2a are in a parallel flow relationship. Needless to say, the exchange is carried out.

(Effect of Embodiment 5)
In the heat exchanger 8d described above, in addition to the effects of the heat exchanger 8c according to the third embodiment, in order to maximize the heat exchange performance in accordance with the operation conditions and physical property values of each refrigerant, When the cross-sectional area is small and the refrigerant flow path is lengthened, the refrigerant flow path can be configured to be folded inside, so that the heat exchange performance can be maximized while suppressing the size of the heat exchanger 8d.

  In addition, since the first relay gathering hole 41a and the like for turning the refrigerant flow path are formed inside the main body 10 of the heat exchanger 8d, it is not necessary to provide a separate pipe, and the heat exchanger 8d is compact. Can be achieved.

  In the heat exchanger 8d according to the present embodiment, the flow operation of the first refrigerant and the second refrigerant has been described as both flowing back. However, the present invention is not limited to this, and one refrigerant is folded back. The other refrigerant may flow linearly as in the fourth embodiment. In this case, which refrigerant is to be turned back and forth is determined according to the operating conditions and physical properties of the respective refrigerants in the heat exchanger, heat transfer performance is high, pressure loss is low, and a suitable heat exchanger It may be selected so that

Embodiment 6 FIG.
Each heat exchanger which concerns on above-mentioned Embodiment 1-Embodiment 5 is mounted in refrigeration cycle apparatuses, such as an air conditioning apparatus, a hot water storage apparatus, and a refrigerator, for example. The refrigeration cycle apparatus according to the present embodiment will be described by taking as an example a case where the heat exchanger 8 according to the first embodiment is mounted.

(Configuration of refrigeration cycle apparatus 200)
FIG. 6 is a refrigerant circuit diagram showing an example of a refrigeration cycle apparatus according to Embodiment 6 of the present invention.
As shown in FIG. 6, the refrigeration cycle apparatus 200 includes a first compressor 230, a first radiator 231, a heat exchanger 8, a first decompressor 232, and a first cooler 233 connected in order by refrigerant piping. The first refrigerant circuit is provided. In addition, the first inlet connection pipe 3 in the heat exchanger 8 is connected to the first radiator 231 by a refrigerant pipe, and the first outlet connection pipe 4 is connected to the first pressure reducing device 232 by the refrigerant pipe. The first refrigerant circuit is configured such that the first refrigerant, which is a high-temperature refrigerant, circulates and operates in a vapor compression refrigeration cycle.

  In addition, the refrigeration cycle apparatus 200 includes a second refrigerant circuit in which a second compressor 240, a second heat radiator 241, a second pressure reducing device 242, and a heat exchanger 8 are sequentially connected by a refrigerant pipe. Moreover, the 2nd inlet connection pipe 5 in the heat exchanger 8 is connected to the 2nd decompression device 242 by refrigerant | coolant piping, and the 2nd exit connection pipe 6 is connected to the 2nd compressor 240 by refrigerant | coolant piping. The second refrigerant circuit is configured such that the second refrigerant, which is a low-temperature refrigerant, circulates and operates in a vapor compression refrigeration cycle.

  As the first refrigerant and the second refrigerant, carbon dioxide, HFC refrigerant, HC refrigerant, HFO refrigerant, refrigerant such as ammonia, or a mixed refrigerant thereof is used. In the present embodiment, a case where carbon dioxide is used as the first refrigerant will be described.

(Operation of refrigeration cycle apparatus 200)
The first refrigerant in the gas state is compressed by the first compressor 230 and discharged as a high-temperature and high-pressure supercritical refrigerant. The first high-temperature and high-pressure supercritical refrigerant flows into the first radiator 231 and exchanges heat with air or the like to dissipate heat to become a high-pressure supercritical refrigerant. The high-pressure supercritical first refrigerant flows into the heat exchanger 8, where it is cooled by dissipating heat to the second refrigerant flowing through the second refrigerant circuit. It flows into the apparatus 232 and is depressurized to become a low-temperature low-pressure gas-liquid two-phase refrigerant. This low-temperature and low-pressure gas-liquid two-phase refrigerant flows into the first cooler 233, evaporates by exchanging heat with air or the like, and becomes a low-temperature and low-pressure gas-state refrigerant. The low-temperature and low-pressure gas state first refrigerant is again sucked into the first compressor 230 and compressed.

  On the other hand, the second refrigerant in a gas state is compressed by the second compressor 240 and discharged as a high-temperature and high-pressure gas refrigerant. The high-temperature and high-pressure gas state second refrigerant flows into the second radiator 241, exchanges heat with air and the like, and condenses to become a high-pressure liquid state refrigerant. The second refrigerant in the high-pressure liquid state flows into the second decompression device 242 and is depressurized to become a low-temperature and low-pressure gas-liquid two-phase refrigerant. This low-temperature and low-pressure gas-liquid two-phase refrigerant flows into the heat exchanger 8, where it absorbs heat and evaporates from the first refrigerant flowing through the first refrigerant circuit, and is a low-temperature and low-pressure gas-state refrigerant. It becomes. The second refrigerant in the low-temperature and low-pressure gas state is again sucked into the second compressor 240 and compressed.

(Effect of Embodiment 6)
In the refrigeration cycle apparatus 200 configured as described above, a large degree of supercooling of the first refrigerant that has flowed out of the first radiator 231 can be secured, and the efficiency of the refrigeration cycle apparatus 200 can be greatly improved. . In particular, in the above example, since carbon dioxide is used as the first refrigerant, the efficiency of the refrigeration cycle apparatus 200 is particularly improved when the heat exchanger 8 dissipates heat to the second refrigerant in a state above the critical point. .

  Moreover, when the heat exchanger 8 is downsized, it contributes to downsizing of the entire refrigeration cycle apparatus 200.

  In addition, although the example which used the carbon dioxide was demonstrated as a 1st refrigerant | coolant which flows through a 1st refrigerant circuit, it is not limited to this, HFC type refrigerant | coolant, HC type | system | group refrigerant | coolant, HFO type | system | group refrigerant | coolants, such as ammonia, Needless to say, these mixed refrigerants may be used. Even in this case, the efficiency of the refrigeration cycle apparatus 200 can be improved by ensuring a large degree of supercooling of the first refrigerant that has flowed out of the first radiator 231.

  In the refrigeration cycle apparatus 200 shown in FIG. 6, the heat exchanger 8 is used as a radiator. However, the present invention is not limited to this, and the circulation direction of the first refrigerant using a four-way valve or the like. If the above is reversed, the heat exchanger 8 can also be used as a cooler.

  In the present embodiment, the second refrigerant circuit is shown as a vapor compression refrigeration cycle, but the second refrigerant may be water or a brine (antifreeze) such as an aqueous ethylene glycol solution. May be constituted by a pump.

  Moreover, as shown in FIG. 6, although the example using the heat exchanger 8 which concerns on Embodiment 1 was shown as a heat exchanger in the refrigerating-cycle apparatus 200 which concerns on this Embodiment, it is limited to this. Needless to say, any one of the heat exchangers 8a to 8d according to the second to fifth embodiments may be used.

Embodiment 7 FIG.
The refrigeration cycle apparatus 200a according to the present embodiment will be described focusing on differences from the configuration and operation of the refrigeration cycle apparatus 200 according to Embodiment 6.

(Configuration of refrigeration cycle apparatus 200a)
FIG. 7 is a refrigerant circuit diagram illustrating an example of a refrigeration cycle apparatus according to Embodiment 7 of the present invention.
As shown in FIG. 7, the refrigeration cycle apparatus 200a is the high temperature discharged from the first compressor 230 except for the first radiator 231 from the configuration of the refrigeration cycle apparatus 200 according to Embodiment 6 shown in FIG. All the high-pressure first refrigerant is cooled in the heat exchanger 8. That is, the refrigeration cycle apparatus 200a shown in FIG. 7 is a so-called secondary loop refrigeration cycle apparatus. In this case, the heat exchanger 8 in the present embodiment replaces the functions of both the first radiator 231 and the heat exchanger 8 in the seventh embodiment.

(Effect of Embodiment 7)
With the above configuration, the necessary heat exchange amount in the heat exchanger 8 is increased, and the volume ratio of the heat exchanger 8 in the entire refrigeration cycle apparatus 200a is the refrigeration according to the seventh embodiment including the first radiator 231. It becomes larger than the cycle device 200. At this time, the heat exchanger 8 is made compact, which contributes to making the entire refrigeration cycle apparatus 200a compact.

  In addition, although the case where the heat exchanger 8 was used as a radiator was shown in the refrigeration cycle apparatus 200a shown in FIG. 7, the present invention is not limited to this, and the circulation direction of the first refrigerant using a four-way valve or the like. If the above is reversed, the heat exchanger 8 can also be used as a cooler.

Embodiment 8 FIG.
The refrigeration cycle apparatus according to the present embodiment will be described by taking as an example a case where the heat exchanger 8 according to the first embodiment is mounted.

(Configuration of refrigeration cycle apparatus 200b)
FIG. 8 is a refrigerant circuit diagram illustrating an example of a refrigeration cycle apparatus according to Embodiment 8 of the present invention.
As shown in FIG. 8, the refrigeration cycle apparatus 200b includes a refrigerant circuit in which a compressor 250, a radiator 251, a heat exchanger 8, a decompression device 252, and a cooler 253 are sequentially connected by refrigerant piping. Yes. Further, a bypass pipe 255 branched from the refrigerant pipe between the heat exchanger 8 and the decompression device 252 is an injection port 256 provided in the compression chamber of the compressor 250, or although not shown here, the compressor 250 and the cooling pipe Connected to the device 253. In this bypass pipe 255, the bypass pressure reducing device 254 and the heat exchanger 8 are installed in this order from the branch point of the refrigerant pipe between the heat exchanger 8 and the pressure reducing device 252.

  Moreover, the 1st inlet connection pipe 3 in the heat exchanger 8 is connected to the heat radiator 251 by refrigerant | coolant piping, and the 1st exit connection pipe 4 is connected to the decompression device 252 by refrigerant | coolant piping. Further, the second inlet connecting pipe 5 in the heat exchanger 8 is connected to the bypass pressure reducing device 254 by a refrigerant pipe, and the second outlet connecting pipe 6 is an injection port 256 of the compressor 250 or a compression (not shown here) by the refrigerant pipe. Connected between machine 250 and cooler 253.

(Operation of refrigeration cycle apparatus 200b)
The gas refrigerant is compressed by the compressor 250 and discharged as a high-temperature and high-pressure gas refrigerant. The high-temperature and high-pressure gas refrigerant flows into the radiator 251, exchanges heat with air or the like to radiate heat, and the high-pressure refrigerant (high-temperature refrigerant) that flows out of the radiator 251 flows into the heat exchanger 8. The high-pressure refrigerant (high-temperature refrigerant) that has flowed into the heat exchanger 8 is cooled by dissipating heat to the low-temperature refrigerant that has flowed out of the bypass decompression device 254, and further flows into the decompression device 252, where it is depressurized. It becomes a two-phase refrigerant. This low-temperature low-pressure gas-liquid two-phase refrigerant flows into the cooler 253, exchanges heat with air or the like, and evaporates to become a low-temperature low-pressure gas refrigerant. This low-temperature and low-pressure gas refrigerant is again sucked into the compressor 250 and compressed.

  A part of the refrigerant flowing out of the heat exchanger 8 branches before flowing into the decompression device 252 and flows into the bypass pipe 255. The refrigerant flowing into the bypass pipe 255 is decompressed by the bypass decompression device 254, becomes a low-temperature gas-liquid two-phase refrigerant (low-temperature refrigerant), and flows into the heat exchanger 8. The low-temperature gas-liquid two-phase refrigerant (low-temperature refrigerant) flowing into the heat exchanger 8 is heated by absorbing heat from the high-temperature refrigerant, and is injected into the compression chamber from the injection port 256 of the compressor 250.

  As the refrigerant circulating in the refrigeration cycle apparatus 200b, a refrigerant such as carbon dioxide, an HFC refrigerant, an HC refrigerant, an HFO refrigerant, ammonia, or a mixed refrigerant thereof is used.

(Effect of Embodiment 8)
Also in the refrigeration cycle apparatus 200b configured as described above, a large degree of supercooling of the refrigerant that has flowed out of the radiator 251 can be secured, and the efficiency of the refrigeration cycle apparatus 200b can be greatly improved.

  Further, in the refrigeration cycle apparatus 200b shown in FIG. 8, the higher the saturation temperature (gas-liquid equilibrium temperature) of the low-temperature refrigerant flowing from the heat exchanger 8 into the injection port 256, the higher the efficiency of the compressor 250. Power can be reduced.

  In addition, as shown in FIG. 8, when the high-temperature refrigerant flowing out of the radiator 251 is cooled by the heat exchanger 8, particularly when the outside air temperature is high and the temperature of the high-temperature refrigerant flowing out of the radiator 251 is relatively high, In the exchanger 8, the temperature difference between the high temperature refrigerant and the low temperature refrigerant can be sufficiently large. For this reason, the temperature of the low-temperature refrigerant injected into the compression chamber of the compressor 250 from the injection port 256 can be maintained high, and high efficiency of the first compressor 230 can be ensured.

  Further, when the other end of the bypass pipe 255 is connected between the compressor 250 and the cooler 253, the refrigerant that flows through the cooler 253 without reducing the refrigeration effect compared to the case where the heat exchanger 8 is not used. The flow rate can be reduced, and particularly when the piping length between the compressor 250 and the cooler 253 is long, a decrease in performance associated with an increase in pressure loss can be suppressed.

  Moreover, when the heat exchanger 8 is downsized, it contributes to downsizing of the entire refrigeration cycle apparatus 200b.

  1 1st refrigerant path, 1a, 1b 1st refrigerant flow path, 2nd refrigerant path, 2a, 2b 2nd refrigerant flow path, 3 1st inlet connection pipe, 3a, 3aa, 3ab, 3b 1st inlet communication hole, 4 First outlet connecting pipe, 4a, 4aa, 4ab, 4b First outlet connecting hole, 5 Second inlet connecting pipe, 5a, 5aa, 5ab, 5b Second inlet connecting hole, 6 Second outlet connecting pipe, 6a, 6aa 6ab, 6b Second outlet communication hole, 8, 8a to 8d Heat exchanger, 10 Main body, 31 First inlet collecting hole, 31a, 31b First collecting hole, 41 First outlet collecting hole, 41a First relay collecting hole , 51 second inlet collecting hole, 51a second relay collecting hole, 61 second outlet collecting hole, 61a, 61b second collecting hole, 200, 200a, 200b refrigeration cycle apparatus, 230 first compressor, 231 first radiator 232 1st decompression device, 2 33 1st cooler, 240 2nd compressor, 241 2nd radiator, 242 2nd decompressor, 250 compressor, 251 radiator, 252 decompressor, 253 cooler, 254 bypass decompressor, 255 bypass pipe, 256 Injection port.

Claims (8)

A first refrigerant path configured such that a plurality of first refrigerant flow paths through which the first refrigerant flows are arranged in parallel in a row;
A second refrigerant path configured by arranging a plurality of second refrigerant flow paths through which the second refrigerant flows in parallel in a row, and a main body formed integrally;
The body is
A first communication hole formed as a hole penetrating the main body in the parallel direction of the plurality of first refrigerant flow paths at both ends of the first refrigerant path, and communicated with the plurality of first refrigerant flow paths;
A second communication hole formed as a hole penetrating the main body in the parallel direction of the plurality of second refrigerant flow paths at both ends of the second refrigerant path, and communicating with the plurality of second refrigerant flow paths;
With
The first refrigerant flows into one of the first communication holes formed at both ends of the first refrigerant path, flows through the first refrigerant flow path, and passes through the other first communication hole. Leaked outside,
The second refrigerant flows into one of the second communication holes formed at both ends of the second refrigerant path, flows through the second refrigerant flow path, and passes through the other second communication hole. Leaked outside,
The first refrigerant flow path and the second refrigerant flow path are parallel to each other and are disposed adjacent to each other, and the first refrigerant and the second refrigerant are arranged through a partition wall on the adjacent surface. heat exchange with is performed,
The first refrigerant path has a plurality of first refrigerant flow path groups that are a set of a plurality of the first refrigerant flow paths,
The second refrigerant path has a plurality of second refrigerant flow path groups that are a set of a plurality of the second refrigerant flow paths,
The first refrigerant flow path groups in the first refrigerant path and the second refrigerant flow path groups in the second refrigerant path are alternately arranged adjacent to each other and parallel in all the refrigerant flow path groups. It is configured so that the directions are parallel,
The first communication holes are formed at both ends of each first refrigerant flow path group, and both ends in the penetrating direction are closed,
The second communication hole is formed at both ends of each second refrigerant flow path group, and both ends in the penetrating direction are closed,
The body is
A plurality of first communicating holes are formed as holes penetrating the main body in the parallel direction, and the first collecting holes communicated with the plurality of first communicating holes and the plurality of second communicating holes in the parallel direction A second assembly hole formed as a hole penetrating the main body and communicating with the plurality of second communication holes;
The first refrigerant flows into one of the first collecting holes formed at both ends of the first refrigerant path, flows through the first refrigerant flow path, and passes through the other first collecting hole. Leaked outside,
The second refrigerant flows into one of the second collecting holes formed at both ends of the second refrigerant path, flows through the second refrigerant channel, and passes through the other second collecting hole. A heat exchanger characterized by flowing out . The first collecting hole has one end in the penetrating direction closed, the other end opened, and the first refrigerant flows in and out from the opening side,
Said second set hole, one end of the through-direction is closed, the other end is opened, the heat exchanger according to claim 1, wherein the entering and exiting flow is the second coolant from the opening side. Of the first communication hole formed at both ends of the first refrigerant path and the second communication hole formed at both ends of the second refrigerant path, the first communication hole and the second The heat exchanger according to claim 1 or 2, wherein the two communication holes are formed by shifting a predetermined amount in a flow path direction of the first refrigerant path or the second refrigerant path. The first communication hole has one end in the penetrating direction closed, the other end opened, and the first refrigerant flows in and out from the opening side,
The second communication hole, the one end of the through-direction is closed, the other end is open to any of claims 1 to 3, characterized in that into and out flow is the second coolant from the opening side The heat exchanger according to one item. The first communication hole is
Of those formed at both ends of the first refrigerant path, at least one is divided into a plurality of parts,
One first divided communication hole inflow portion that allows the first refrigerant to flow in from the outside and circulates in a part of the plurality of first refrigerant channels, and the first refrigerant channel that has circulated from some of the first refrigerant channels. One or more first divided communication hole folding portions that circulate one refrigerant into a part of the first refrigerant flow channel other than the part of the first refrigerant flow channel, and the first divided communication hole A first divided communication hole outflow portion that causes the first refrigerant that has flowed through a part of the first refrigerant flow path from the turn-back portion to flow to the outside is formed, and the first refrigerant turns back the first refrigerant path. The heat exchanger according to any one of claims 1 to 4 , wherein the heat exchanger is configured to flow. The second communication hole is
Among those formed at both ends of the second refrigerant path, at least one is divided into a plurality of parts,
One second divided communication hole inflow portion for allowing the second refrigerant to flow in from the outside and flowing through a part of the plurality of second refrigerant channels, and the second refrigerant channel flowing from a part of the second refrigerant channels. One or more second divided communication hole folding portions for circulating two refrigerants in a part of the second refrigerant flow channel other than the part of the second refrigerant flow channel, and the second divided communication hole A second divided communication hole outflow portion that allows the second refrigerant that has flowed through a part of the second refrigerant flow path from the turn-back portion to flow to the outside is formed, and the second refrigerant turns back the second refrigerant path. The heat exchanger according to claim 5 , wherein the heat exchanger is configured to flow. Wherein the first refrigerant and the flow direction of the second refrigerant, according to any one of claims 1 to 6, characterized in that it is configured such that the counter flow in at least a portion of the coolant channel Heat exchanger. A refrigeration cycle apparatus comprising the heat exchanger according to any one of claims 1 to 7 .

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