WO2012098572A1

WO2012098572A1 - Laminate-type heat exchanger and heat pump system equipped with same

Info

Publication number: WO2012098572A1
Application number: PCT/JP2011/000222
Authority: WO
Inventors: 瑞朗酒井; 浩昭中宗; 寿守務吉村
Original assignee: 三菱電機株式会社
Priority date: 2011-01-18
Filing date: 2011-01-18
Publication date: 2012-07-26
Also published as: EP2667136A4; JP5496369B2; EP2667136A1; EP2667136B1; JPWO2012098572A1

Abstract

Provided is a laminate-type heat exchanger that requires no bending process for a heat transfer pipe and has no dead space caused by a header pipe, and also provided is a heat pump system equipped with the laminate-type heat exchanger. A heat exchanger (10) has a construction in which a plurality of first heat transfer pipes (1) and second heat transfer pipes (2) having a rectangular shape are stacked alternately. The first and second heat transfer pipes comprise refrigerant passages having rectangular cross sections through which a refrigerant flows, wherein the refrigerant passages have substantially the same length in the direction in which the refrigerant flows, and substantially the same length in the width direction of the refrigerant passages.

Description

Laminated heat exchanger and heat pump system equipped with the same

The present invention relates to a heat exchanger that performs heat exchange between a first refrigerant and a second refrigerant that are a low-temperature fluid or a high-temperature fluid, and a heat pump system equipped with the heat exchanger.

As a conventional heat exchanger, a first heat transfer tube through which a low-temperature fluid flows and a second heat transfer tube arranged such that a high-temperature fluid flows and the flow direction of the high-temperature fluid is parallel to the flow direction of the low-temperature fluid are alternately arranged. The heat exchanger is formed by stacking at least one heat transfer tube with a plurality of heat transfer tubes arranged in the stacking direction, and both ends of the plurality of heat transfer tubes are arranged in either the flow direction or the stacking direction of each fluid. Also, it is configured to be bent in a direction orthogonal to the above. Furthermore, a parallel flow path is constituted by the plurality of heat transfer tubes and the inlet header and the outlet header, either the inlet header or the outlet header is constituted by a tubular header, and the plurality of heat transfer pipes constituting the parallel flow path are provided. Some are bundled and connected so that the tube axis direction of the tubular header and the fluid flow direction of the heat transfer tube are perpendicular to each other (for example, see Patent Document 1).

WO2007 / 122865A1 (page 28, FIG. 17)

However, since the heat exchanger described in Patent Document 1 has a structure in which heat transfer tubes are stacked, although it has high performance and high space efficiency, at least one of the header tubes into which the refrigerant flows is perpendicular to the stacking direction. Since it has the structure connected with the heat exchanger tube bent in the direction, there existed a problem that it had the bending process to the width direction of the heat exchanger tube at that time, and the dead space by a header pipe increased.

The present invention was made in order to solve the above-described problems, and has an object to obtain a stacked heat exchanger without a dead space due to a header pipe and a heat pump system equipped with the same without a heat transfer pipe bending step. To do.

The laminated heat exchanger according to the present invention has a flat shape, a plurality of first heat transfer tubes in which the first refrigerant flows through a first refrigerant flow path therein, and a flat shape. A plurality of second heat transfer tubes, in which a second refrigerant having a temperature different from that of the first refrigerant flows through a second refrigerant flow path therein, the first heat transfer tube, and the second heat exchanger are stacked in contact with the heat tubes alternately. In the heat transfer tube, any one of the two outermost heat transfer tubes which are the first heat transfer tube or the second heat transfer tube which communicate with the first refrigerant flow paths and are located at both ends in the stacking direction in the stacked structure. In one of the outermost heat transfer tubes, in the first heat transfer tube and the second heat transfer tube, two sets of first communication holes formed so as to communicate with the first refrigerant flow path and the outside. The second refrigerant flow paths communicate with each other, and the two outermost heat transfer tubes Two sets of second communication holes formed so as to allow the second refrigerant flow path to communicate with the outside in any one of the outermost heat transfer tubes, and the first refrigerant of each first heat transfer tube Closing means for closing the flow passages and openings formed at both ends of the second refrigerant flow passages of the second refrigerant flow passages of the second heat transfer tubes, and the second heat transfer tubes First blocking means for blocking the first communication hole so as not to communicate with the second refrigerant flow path, and the second communication hole formed in each of the first heat transfer tubes communicates with the first refrigerant flow path. A second shut-off means for shutting off so as not to be formed, and the two first communication holes formed in the outermost heat transfer tube for communicating the refrigerant flow path inside the outermost heat transfer tube with the outside, respectively, 1 functions as an inlet and an outlet for the refrigerant, formed in the outermost heat transfer tube, The two second communication holes for communicating the refrigerant flow path with the outside function as an inlet and an outlet for the second refrigerant, respectively, and contact surfaces of the first heat transfer pipe and the second heat transfer pipe are provided. Thus, heat exchange between the first refrigerant and the second refrigerant is performed.

According to the present invention, the first refrigerant flow path of each first heat transfer tube is communicated with the first port that is the outflow inlet of the first refrigerant, and the second port from the second port that is the outflow inlet of the second refrigerant. By making the 2nd refrigerant | coolant flow path of a heat exchanger tube connect, a header pipe | tube can be made unnecessary, a dead space can be eliminated, and the whole laminated heat exchanger can be made compact.

It is a perspective view of the heat exchanger 10 which is a laminated heat exchanger which concerns on Embodiment 1 of this invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a three-side view including a top view, a cross-sectional view along AA, and a side view of a heat exchanger 10 that is a stacked heat exchanger according to Embodiment 1 of the present invention. It is a three-view figure of the lid | cover 8 inserted in the heat exchanger tube edge part of the heat exchanger 10 which is a laminated heat exchanger which concerns on Embodiment 1 of this invention. It is principal part sectional drawing of the heat exchanger tube which shows the structure of the heat exchanger 10 which is a laminated heat exchanger which concerns on Embodiment 1 of this invention. It is a figure which shows the manufacturing method of the heat exchanger 10 which is a laminated heat exchanger which concerns on Embodiment 1 of this invention. It is a perspective view of the heat exchanger 10a which is a laminated heat exchanger which concerns on Embodiment 2 of this invention. FIG. 6 is a three-side view including a top view, a BB cross-sectional view, and a side view of a heat exchanger 10a that is a stacked heat exchanger according to Embodiment 2 of the present invention. It is a figure which shows the manufacturing method of the heat exchanger 10a which is a laminated heat exchanger which concerns on Embodiment 2 of this invention. It is sectional drawing of the heat exchanger tube of the laminated heat exchanger which concerns on Embodiment 3 of this invention. It is a block diagram of the heat pump system using the heat of the heat exchanger which concerns on Embodiment 4 of this invention. It is a block diagram of another form of the heat pump system which concerns on Embodiment 4 of this invention. It is a block diagram of another form of the heat pump system which concerns on Embodiment 4 of this invention. It is a block diagram of another form of the heat pump system which concerns on Embodiment 4 of this invention.

Embodiment 1 FIG.
(Structure of heat exchanger 10)
FIG. 1 is a perspective view of a heat exchanger 10 that is a stacked heat exchanger according to Embodiment 1 of the present invention. FIG. 2 is a top view of the heat exchanger 10, a cross-sectional view taken along line AA, and a side view. FIG. 3 is a three-side view of the lid 8 inserted into the heat transfer tube end portion of the heat exchanger 10. Hereinafter, the configuration of the heat exchanger 10 that is the stacked heat exchanger according to the present embodiment will be described with reference to FIGS. 1 to 3. Moreover, in the following description, it demonstrates according to the up-down and left-right direction of FIG.

As shown in FIGS. 1 and 2, the heat exchanger 10 has a refrigerant flow path in which the refrigerant flows in a rectangular shape, and has substantially the same length in the refrigerant flow direction of the refrigerant flow path. In addition, a plurality of rectangular first heat transfer tubes 1 and second heat transfer tubes 2 having substantially the same length in the width direction of the refrigerant flow path are alternately stacked. Among these, the rectangular refrigerant flow path penetrating the first heat transfer tube end portion 5, which is the end portions on both sides of the first heat transfer tube 1, is defined as the first refrigerant flow passage 1 a, and the end portions on both sides of the second heat transfer tube 2. A rectangular refrigerant flow path penetrating through the second heat transfer tube end 6 is defined as a second refrigerant flow path 2a. The first refrigerant flow path 1a at the first heat transfer tube end 5 and the second refrigerant flow path 2a at the second heat transfer tube end 6 are respectively closed by a lid 8. As shown in FIG. 3, the lid 8 includes a rectangular heat transfer tube insertion portion 8 a erected vertically with respect to one surface of the lid 8. Further, the heat transfer tube insertion portion 8 a is erected in such a manner that it is closer to one side from the longitudinal center of the lid 8. When the first refrigerant flow path 1a at the first heat transfer tube end 5 and the second refrigerant flow path 2a at the second heat transfer tube end 6 are closed by the lid 8, the heat transfer tube insertion portion 8a is placed inside. Inserted. At this time, the heat transfer tube insertion portions 8a inserted into the first refrigerant flow paths 1a at all the first heat transfer tube end portions 5 are inserted so as to be closer to the same side from the longitudinal center of the lid 8. On the other hand, each heat transfer tube insertion portion 8a inserted into the second refrigerant flow path 2a in all the second heat transfer tube end portions 6 is inserted into the first refrigerant flow path 1a from the center in the longitudinal direction of the lid 8. It is inserted so as to be closer to the opposite side to the heat transfer tube insertion portion 8a.

The first heat transfer tube 1 and the second heat transfer tube 2 have substantially the same length in the refrigerant flow direction of the refrigerant flow channel and in the width direction of the refrigerant flow channel, but are not limited thereto. There may be different lengths.

Further, the lid 8 and the heat exchanger 10 correspond to the “closing means” and the “stacked heat exchanger” of the present invention, respectively. Further, the heat transfer tube insertion portion 8a inserted into the second refrigerant flow path 2a and the heat transfer tube insertion portion 8a inserted into the first refrigerant flow path 1a are the “first blocking means” and “first” of the present invention, respectively. This corresponds to “2 blocking means”.

1 and 2, the upper surface of the uppermost heat transfer tube (in FIG. 1 and FIG. 2, the first heat transfer tube 1) of the laminated structure of the first heat transfer tube 1 and the second heat transfer tube 2 is used. As will be described later, a tubular first port 3 communicating with the first refrigerant flow path 1a of the first heat transfer tube 1 and a tubular first port 3 communicating with the second refrigerant flow path 2a of the second heat transfer tube 2 are included. The two ports 4 are brazed with a brazing material 21 such as an aluminum-silicon system. Two first ports 3 and two second ports 4 are installed for the refrigerant inlet and the outlet, respectively, and are connected to a refrigerant circuit or the like in the heat pump system.

As shown in FIGS. 1 and 2, the uppermost heat transfer tube in the laminated structure of the heat transfer tubes is the first heat transfer tube 1, but is not limited to this, and the second heat transfer tube 2 is not limited to this. It goes without saying that the top row may be used.
Moreover, as shown in FIG.1 and FIG.2, although it is set as the structure by which the 1st port 3 and the 2nd port 4 are installed in the uppermost heat transfer tube among the laminated structures of a heat transfer tube, it is limited to this Instead of this, the first port 3 and the second port 4 are not installed, and a communication hole formed in the uppermost heat transfer tube is used as a connection port to directly connect piping such as a refrigerant circuit in the heat pump system. Good.

Next, referring to FIG. 2 and FIG. 3, a structure in which the first port 3 and the first refrigerant flow path 1a of the stacked first heat transfer tubes 1 communicate with each other, and the second port 4 and the stacked second A structure in which the second refrigerant flow path 2a of the heat transfer tube 2 communicates will be described. 2A is a top view of the heat exchanger 10 according to the present embodiment, FIG. 2B is a cross-sectional view taken along the line AA in FIG. 2A, and FIG. ) Is a side view of the heat exchanger 10.

As shown in FIG. 2 (b), the first communication hole 3 a passes through the upper surface and the lower surface of the uppermost first heat transfer tube 1, and the first port 3 is connected to the first heat transfer tube 1. It communicates with the first refrigerant flow path 1a through the first communication hole 3a on the upper surface. The first communication hole 3 a formed in the lower surface of the first heat transfer tube 1 communicates with the first communication hole 3 b formed through the upper surface of the second heat transfer tube 2 immediately below the first heat transfer tube 1. is doing. Here, the heat transfer tube insertion portion 8a of the lid 8 is inserted into the second refrigerant flow path 2a of the second heat transfer tube 2 communicating with the first communication hole 3b. However, as shown in FIG. 3, a communication hole 8 b is formed through the heat transfer tube insertion portion 8 a, and the communication hole 8 b and the first communication hole 3 b on the upper surface of the second heat transfer tube 2 Further, they communicate with each other, and also communicate with a first communication hole 3 b formed through the lower surface of the second heat transfer tube 2. Further, in the first heat transfer tube 1 immediately below the second heat transfer tube 2, the first communication hole 3a is penetrated through the upper surface and the lower surface of the first heat transfer tube 1 in the same manner as the uppermost first heat transfer tube 1. The first communication hole 3b on the lower surface of the second heat transfer tube 2 directly above the heat transfer tube 1 communicates with the first refrigerant flow path 1a through the first communication hole 3a on the upper surface of the first heat transfer tube 1. Yes.

That is, the first port 3 communicates with the first refrigerant flow path 1a of the uppermost first heat transfer tube 1, and the first refrigerant flow path 1a further passes through the second heat transfer tube 2 directly below the first refrigerant flow path 1a. Furthermore, it communicates with the first refrigerant flow path 1a of the first heat transfer tube 1 therebelow. Hereinafter, the same structure is taken, the 1st refrigerant | coolant flow path 1a of the 1st port 3 and each 1st heat exchanger tube 1 has the structure connected, and the 2nd refrigerant | coolant flow path 2a of the 2nd heat exchanger tube 2 is a lid | cover. 8 has a structure blocked by the heat transfer tube insertion portion 8a. However, in the lowermost first heat transfer tube 1 (the second heat transfer tube from the bottom in FIG. 2B) of the laminated structure of the first heat transfer tube 1 and the second heat transfer tube 2, only the upper surface has the first communication hole 3a. Is formed. With such a structure, the refrigerant flowing from one of the two first ports 3 (hereinafter referred to as the first refrigerant) flows through the first refrigerant flow path 1a of each first heat transfer tube 1 in the laminated structure. , Flows out from the other first port 3.

A second communication hole 4 a passes through the upper surface and the lower surface of the uppermost first heat transfer tube 1, and the second port 4 passes through the second communication hole 4 a on the upper surface of the first heat transfer tube 1. And communicated with the first refrigerant flow path 1a. Here, the heat transfer tube insertion portion 8a of the lid 8 described above is inserted into the first refrigerant channel 1a of the first heat transfer tube 1 communicating with the second communication hole 4a. However, as shown in FIG. 3, a communication hole 8 b is formed through the heat transfer tube insertion portion 8 a, and the communication hole 8 b and the second communication hole 4 a on the upper surface of the first heat transfer tube 1 Further, they communicate with each other and a second communication hole 4 a formed so as to penetrate the lower surface of the first heat transfer tube 1. The second heat transfer tube 2 directly below the first heat transfer tube 1 has a second communication hole 4b passing through the upper surface and the lower surface thereof, and the first heat transfer tube 1 directly above the second heat transfer tube 2 The second communication hole 4 a on the lower surface communicates with the second refrigerant flow path 2 a through the second communication hole 4 b on the upper surface of the second heat transfer tube 2. Further, the second communication hole 4 b formed in the lower surface of the second heat transfer tube 2 communicates with the second communication hole 4 a formed through the upper surface of the first heat transfer tube 1 immediately below the second heat transfer tube 2. is doing. Here, similarly to the above, the heat transfer tube insertion portion 8a is inserted into the first refrigerant flow path 1a of the first heat transfer tube 1 communicating with the second communication hole 4a, and the heat transfer tube insertion portion 8a is inserted into the heat transfer tube insertion portion 8a. Is formed through the communication hole 8b, and the communication hole 8b and the second communication hole 4a on the upper surface of the first heat transfer tube 1 communicate with each other, and these further penetrate the lower surface of the first heat transfer tube 1. The second communication hole 4a formed in this way is also communicated. The second heat transfer tube 2 directly below the first heat transfer tube 1 has a second communication hole 4b passing through the upper surface and the lower surface thereof, and the first heat transfer tube 1 directly above the second heat transfer tube 2 The second communication hole 4a on the lower surface communicates with the second refrigerant flow path 2a through the second communication hole 4b on the upper surface of the second heat transfer tube 2 among them.

That is, the second port 4 communicates with the second refrigerant flow path 2a of the second heat transfer pipe 2 immediately below the uppermost first heat transfer pipe 1, and further, the second refrigerant flow path 2a is directly below it. The first heat transfer tube 1 is further communicated with the second refrigerant flow path 2a of the second heat transfer tube 2 therebelow. Hereinafter, the same structure is adopted, and the second refrigerant flow path 2a of the second port 4 and each of the second heat transfer tubes 2 has a communication structure, and the first refrigerant flow path 1a of the first heat transfer tube 1 is a lid. 8 has a structure blocked by the heat transfer tube insertion portion 8a. However, in the lowermost second heat transfer tube 2 (the lowermost heat transfer tube in FIG. 2B) of the laminated structure of the first heat transfer tube 1 and the second heat transfer tube 2, the second communication hole 4b is formed only on the upper surface. Has been. With such a structure, the refrigerant flowing from one of the two second ports 4 (hereinafter referred to as the second refrigerant) flows through the second refrigerant flow path 2a of each second heat transfer tube 2 in the laminated structure. , And flows out from the other second port 4.

In addition, as shown in FIG. 1, each of the four first heat transfer tubes 1 and the second heat transfer tubes 2 is configured to be alternately stacked. The first heat transfer tube 1 and the second heat transfer tube 2 may be alternately stacked.

Further, the number of the first heat transfer tubes 1 and the second heat transfer tubes 2 to be stacked is not limited to the same number. For example, the number of the first heat transfer tubes 1 is one more than the number of the second heat transfer tubes 2. It is good also as a laminated structure with few or one.

Further, as shown in FIG. 2B, a first refrigerant channel 1a and a second refrigerant channel 2a having a rectangular cross section are formed in the first heat transfer tube 1 and the second heat transfer tube 2, respectively. However, the present invention is not limited to this, and other shapes such as an ellipse may be used.

Further, as shown in FIG. 3, the heat transfer tube insertion portion 8a has a rectangular shape, but is not limited thereto, and may have a different shape as long as the communication hole 8b can be formed.

Moreover, as shown in FIG.1 and FIG.2, although the upper surface of the 1st heat exchanger tube 1 and the 2nd heat exchanger tube 2 is made into the rectangle, it is not limited to this, For example, let the four corners of a rectangle be R shape Alternatively, the shape may be a parallelogram or the like, or the shape may be appropriately changed depending on the position mounted on the heat pump system or the like.

Further, as shown in FIG. 2, the first communication hole 3a formed in the first heat transfer tube 1, the first communication hole 3b formed in the second heat transfer tube 2, and the second refrigerant channel 2a are inserted. The communication hole 8b of the heat transfer tube insertion portion 8a formed is concentrically formed in the same diameter and in the stacking direction, but is not limited thereto, and is not limited to the same diameter or concentric in the stacking direction. The first refrigerant flow path 1a of each first heat transfer tube 1 may be formed so as to communicate with each other. Similarly, the 2nd communicating hole 4a formed in the 1st heat exchanger tube 1, the 2nd communicating hole 4b formed in the 2nd heat exchanger tube 2, and the heat exchanger tube insertion part 8a inserted in the 1st refrigerant channel 1a. The communication holes 8b have the same diameter and are concentrically formed in the stacking direction, but are not limited to this, and are not limited to the same diameter or are not concentric in the stacking direction. Alternatively, the second refrigerant flow path 2a of each second heat transfer tube 2 may be formed to communicate with each other. Moreover, each said hole is not limited to circular shape, You may form in other shapes, such as a rectangular shape.

The communication hole 8b corresponds to the “insertion part communication hole” of the present invention.

(Manufacturing method of the heat exchanger 10)
FIG. 4 is a cross-sectional view of a main part of the heat exchanger 10 that is the stacked heat exchanger according to Embodiment 1 of the present invention, and FIG. 5 is a diagram illustrating a method for manufacturing the heat exchanger 10.
The first heat transfer tube 1 and the second heat transfer tube 2 of the heat exchanger 10 of the present embodiment shown in FIGS. 1 and 2 are made of a material having good heat conductivity, such as an aluminum alloy, copper, or stainless steel. After bending a flat plate by roll forming, etc., the seam at both ends of the flat plate is formed by electro-sewing (welding), the cylinder is roll-formed or press-molded, or extruded or pultruded. Manufactured by doing.

Also, the laminated structure of the first heat transfer tube 1 and the second heat transfer tube 2 shown in FIG. 4 is brazed and joined with a brazing material 21 such as an aluminum-silicon system at the contact surfaces of each other.

Further, as shown in FIG. 5A, the openings of the first refrigerant flow path 1 a at the first heat transfer tube end portions 5 on both sides of the first heat transfer tube 1 and the second heat transfer tube 2 on both sides. As described above, the heat transfer tube insertion portion 8a of the lid 8 is inserted into the opening of the second refrigerant flow path 2a at the heat transfer tube end 6 and is closed by the lid 8, respectively. At this time, the heat transfer tube insertion portion 8a is brazed to the inner surface of the first refrigerant channel 1a and the inner surface of the second refrigerant channel 2a by the brazing material 21, and further, the first heat transfer tube end 5 and the second 2 The joining surface between the heat transfer tube end 6 and the lid 8 is also brazed and joined by the brazing material 21. Accordingly, the refrigerant does not leak from the first heat transfer tube end 5 and the second heat transfer tube end 6. Further, the heat transfer tube insertion portion 8a is brazed to each of the inner surface of the first refrigerant channel 1a and the inner surface of the second refrigerant channel 2a, whereby the first refrigerant channel 1a and the second refrigerant channel 2a are The first refrigerant flowing through the first refrigerant flow path 1a and the second refrigerant flowing through the second refrigerant flow path 2a are not mixed without being communicated.

Further, as shown in FIG. 5B, a tubular first port is formed on the upper surface of the first heat transfer tube 1 which is the uppermost heat transfer tube of the laminated structure of the first heat transfer tube 1 and the second heat transfer tube 2. Two each of the third port 4 and the second port 4 are installed by brazing with a brazing material (not shown). As described above, the first port 3 is configured to communicate with the first refrigerant flow paths 1a of all the first heat transfer tubes 1, and the second port 4 includes all the second heat transfer tubes 2. The second refrigerant channel 2a is configured to communicate with the second refrigerant channel 2a.

The heat exchanger 10 that is a stacked heat exchanger is configured by the above method.

(Heat exchange operation of the heat exchanger 10)
A heat exchanger 10 that is a stacked heat exchanger according to the present embodiment is mounted on a heat pump system that uses hot or cold heat. For example, in the case of the operation using the warm heat, the high-temperature first refrigerant flowing from the refrigerant circuit flows into the heat exchanger 10 from one first port 3, and the first refrigerant in each first heat transfer tube 1. It flows through the flow path 1 a and flows out from the other first port 3. The second refrigerant flowing from the use side circuit flows into the heat exchanger 10 from one second port 4 and flows through the second refrigerant flow path 2a of each second heat transfer tube 2, while the other refrigerant flows. Outflow from the second port 4. At this time, the first refrigerant and the second refrigerant flow in a counterflow or parallel flow through the first refrigerant flow path 1a of the first heat transfer tube 1 and the second refrigerant flow path 2a of the second heat transfer tube 2, respectively. The heat exchange is carried out through the wall surfaces of the first heat transfer tube 1 and the second heat transfer tube 2.

In the heat exchanger 10 according to the present embodiment, the flow area of the first refrigerant flow path 1a of the first heat transfer tube 1 and the flow area of the second refrigerant flow path 2a of the second heat transfer tube 2 are as follows. , Not necessarily the same. If there is a difference between the first refrigerant and the second refrigerant in terms of thermophysical values such as specific heat or density, flow rate, pressure conditions, fluid cleanliness, etc., the first refrigerant channel 1a and the second refrigerant The flow passage area may be different between the refrigerant flow passage 2a. For example, when carbon dioxide or a fluorocarbon refrigerant is used as the first refrigerant and tap water or the like whose water quality is not sufficiently controlled is used as the second refrigerant, in order to improve heat exchange performance, or the refrigerant In order to suppress an increase in pressure loss due to scale adhesion to the inner surface of the flow channel, the refrigerant flow channel area may be larger than the flow channel area of the first refrigerant flow channel 1a.

(Effect of Embodiment 1)
The heat exchanger described in Patent Document 1 has a dead space due to a header pipe that distributes the refrigerant to each heat transfer pipe, and has reduced space efficiency. By connecting the first refrigerant flow path 1a of each first heat transfer tube 1 from the port 3 and communicating the second refrigerant flow path 2a of each second heat transfer tube 2 from the second port 4, no header pipe is required. The dead space can be eliminated, and the entire heat exchanger 10 can be made compact.

Moreover, although the heat exchanger described in Patent Document 1 needs to bend the heat transfer tube joined to the header tube, the heat transfer tube (first heat transfer tube) in the heat exchanger 10 according to the present embodiment. The first and second heat transfer tubes 2) are excellent in workability because it is not necessary to perform such bending processing and only hole processing is required.

Also, by alternately laminating the first heat transfer tubes 1 and the second heat transfer tubes 2, the heat exchange efficiency between the first refrigerant and the second refrigerant can be improved. Furthermore, the 1st heat exchanger tube 1 and the 2nd heat exchanger tube 2 are made into the substantially same length in the distribution direction of the refrigerant | coolant of the refrigerant | coolant flow path, and the width direction of a refrigerant | coolant flow path. Can be more effectively implemented, and the entire heat exchanger 10 can be made compact.

In addition, on the upper surface of the uppermost heat transfer tube (the first heat transfer tube 1 in FIGS. 1 and 2) of the stacked structure of the heat exchanger 10, the two first ports 3 and the second port 4 are diagonally connected. And in the vicinity of the lid 8 which is the end of the refrigerant flow path in the heat transfer tube, the flow path length through which the refrigerant flows in each first refrigerant flow path 1a and each second refrigerant flow path 2a is substantially the longest. The heat exchange efficiency between the first refrigerant and the second refrigerant can be further improved.
However, it is not limited to installing the first port 3 and the second port 4 at the above positions, and the positions of the first port 3 and the second port 4 depending on the mounting position of the heat exchanger 10 in the heat pump system or the like. In this case, the first port 3 communicates with the communication hole 8b in the heat transfer tube insertion portion 8a inserted into the second refrigerant flow path 2a, and the second port 4 It is necessary to communicate with the communication hole 8b in the heat transfer tube insertion portion 8a inserted into the one refrigerant flow path 1a.
Further, as shown in FIGS. 1 and 2, each of the two first ports 3 and the second ports 4 is configured to be installed on the upper surface of the uppermost heat transfer tube of the laminated structure of the heat exchanger 10. This is not limited. For example, one of the two first ports 3 may be installed on the upper surface of the uppermost heat transfer tube of the laminated structure, and the other may be installed on the lower surface of the lowermost heat transfer tube. The same applies to the two second ports 4. The first port 3 and the second port 4 may not be installed on the same surface. For example, the two first ports 3 may be installed on the upper surface of the uppermost heat transfer tube of the laminated structure, and the two second ports 4 may be installed on the lower surface of the lowermost heat transfer tube of the laminated structure.

Further, the heat transfer tube insertion portion 8a is brazed to each of the inner surface of the first refrigerant channel 1a and the inner surface of the second refrigerant channel 2a, whereby the first refrigerant channel 1a and the second refrigerant channel 2a are Therefore, the first refrigerant flowing through the first refrigerant flow path 1a and the second refrigerant flowing through the second refrigerant flow path 2a can be prevented from being mixed without being blocked and communicated.

Embodiment 2. FIG.
(Structure of heat exchanger 10a)
FIG. 6 is a perspective view of a heat exchanger 10a that is a stacked heat exchanger according to Embodiment 2 of the present invention, and FIG. 7 is a top view, a BB sectional view, and a side view of the heat exchanger 10a. FIG. Hereinafter, with reference to FIG. 6 and FIG. 7, the configuration of the heat exchanger 10 a that is the stacked heat exchanger according to the present embodiment is different from the configuration of the heat exchanger 10 according to the first embodiment. The explanation is centered.

As shown in FIGS. 6 and 7, the heat exchanger 10a has a refrigerant flow path in which the refrigerant flows in a rectangular shape, and has the same length in the flow direction of the refrigerant in the refrigerant flow path, In addition, a plurality of rectangular first heat transfer tubes 1 and second heat transfer tubes 2 having substantially the same length in the width direction of the refrigerant flow path are alternately stacked. Among these, the rectangular refrigerant flow path penetrating the first heat transfer tube end portion 5, which is the end portions on both sides of the first heat transfer tube 1, is defined as the first refrigerant flow passage 1 a, and the end portions on both sides of the second heat transfer tube 2. A rectangular refrigerant flow path penetrating through the second heat transfer tube end 6 is defined as a second refrigerant flow path 2a.

The heat exchanger 10a corresponds to the “stacked heat exchanger” of the present invention.

The first heat transfer tube 1 extends from one end portion in the longitudinal direction to the other end side in a region of a predetermined length from the first heat transfer tube end portion 5 toward the inside as viewed from the penetration direction of the first refrigerant flow path 1a. It has the crushing part 9a formed by crushing the part to the middle from the up-down direction in FIG. A part of the opening of the first refrigerant flow path 1a is closed by the crushing portion 9a. Similarly, in the first heat transfer tube end portion 5 on the opposite side of the first heat transfer tube end portion 5 where the crushing portion 9a is formed, a crushing portion 9a is formed, and at this time, two crushing portions are formed. 9a is formed so that it may become a diagonal position seeing from the upper surface of the 1st heat exchanger tube 1. As shown in FIG. Further, the central portion sandwiched between the two crushing portions 9a of the first heat transfer tube 1 is arranged so that the first refrigerant flow path 1a inside the first heat transfer tube 1 is not crushed and disappears, as shown in FIG. As a result, the swelled portion 9b is formed so that the portion on the other end side that has not been crushed when the crushed portion 9a is formed is swelled from the center portion. Two raised portions 9b are formed corresponding to the two crushed portions 9a, and are formed so as to be diagonally positioned when viewed from the upper surface of the first heat transfer tube 1. Similarly, for the second heat transfer tube 2, a crushing portion 9 c and a raised portion 9 d are formed for the second heat transfer tube end portions 6 on both sides. In addition, as described above, a part of the opening of the first refrigerant flow path 1a of the first heat transfer tube 1 is closed by the crushing part 9a, but the part of the rising part 9b is open, Inside this, there is formed a first refrigerant auxiliary channel 1b communicating with the first refrigerant channel 1a. Similarly, a part of the opening of the second refrigerant flow path 2a of the second heat transfer tube 2 is blocked by the crushing part 9c, but the part of the rising part 9d is open, A second refrigerant auxiliary channel 2b communicating with the second refrigerant channel 2a is formed.

Moreover, the laminated structure of the 1st heat exchanger tube 1 and the 2nd heat exchanger tube 2 is the 1st heat exchanger tube 1 so that the crushing part 9a of the 1st heat exchanger tube 1 and the rising part 9d of the 2nd heat exchanger tube 2 may overlap. The raised portion 9b and the crushing portion 9c of the second heat transfer tube 2 are stacked so as to overlap each other. At this time, the crushed portion 9 a and the raised portion 9 d are brazed by the brazing material 21, and similarly, the raised portion 9 b and the crushed portion 9 c are also brazed by the brazing material 21.

Further, as shown in FIGS. 6 and 7, both sides of the uppermost heat transfer tube (in FIG. 6 and FIG. 7, the first heat transfer tube 1) of the laminated structure of the first heat transfer tube 1 and the second heat transfer tube 2. On the upper surface of the raised portion 9b formed at the end portion (the first heat transfer tube end portion 5 in FIGS. 6 and 7), the tubular first communicating with the first refrigerant auxiliary flow path 1b is described later. A tubular second port 4 communicating with the second refrigerant auxiliary flow path 2b is brazed to the upper surface of the 1 port 3 and the crushing portion 9a with a brazing material 21, respectively, as will be described later. The first port 3 and the second port 4 are provided for the refrigerant inlet and outlet, respectively, as described above, and are connected to a refrigerant circuit or the like in the heat pump system.

Next, referring to FIG. 6 and FIG. 7, the first port 3 and the structure in which the first refrigerant flow path 1a of the stacked first heat transfer tube 1 communicates, and the second port 4 and the stacked second A structure in which the second refrigerant flow path 2a of the heat transfer tube 2 communicates will be described. FIG. 7A is a top view of the heat exchanger 10a according to the present embodiment, FIG. 7B is a cross-sectional view taken along the line BB in FIG. 7A, and FIG. ) Is a side view of the heat exchanger 10a.

As shown in FIG. 7B, the first communication hole 3c is penetrated through the upper surface and the lower surface of the raised portion 9b formed in the uppermost first heat transfer tube 1, and the first port 3 is The first refrigerant auxiliary flow path 1b formed inside the raised portion 9b communicates with the first communicating hole 3c on the upper surface of the raised portion 9b. The first refrigerant auxiliary flow path 1 b communicates with the first refrigerant flow path 1 a of the first heat transfer tube 1. Moreover, the 1st communicating hole 3c formed in the lower surface of the rise part 9b is penetrated and formed in the crushing part 9c located in the 2nd heat exchanger tube 2 directly under the 1st heat transfer pipe 1 directly under the rise part 9b. The first communication hole 3d communicated. Here, as described above, the crushing portion 9c closes a part of the opening of the second refrigerant flow path 2a of the second heat transfer tube 2, and the first communication hole 3d serves as the second refrigerant flow path. It does not communicate with 2a. Further, in the first heat transfer tube 1 directly below the second heat transfer tube 2, the raised portion 9b located immediately below the crushing portion 9c is also the same as the raised portion 9b formed in the uppermost first heat transfer tube 1. The first communication hole 3c is penetrated through the upper surface and the lower surface, and the first communication hole 3d is formed inside the first communication hole 3c on the upper surface of the raised portion 9b. It communicates with the first refrigerant auxiliary channel 1b and further communicates with the first refrigerant channel 1a of the first heat transfer tube 1.

That is, the first port 3 communicates with the first refrigerant flow path 1a of the uppermost first heat transfer tube 1, and the first refrigerant flow path 1a further passes through the second heat transfer tube 2 directly below the first refrigerant flow path 1a. Furthermore, it communicates with the first refrigerant flow path 1a of the first heat transfer tube 1 therebelow. Hereinafter, the same structure is taken, and the first refrigerant flow path 1a of the first port 3 and each of the first heat transfer tubes 1 has a communication structure, and the second refrigerant flow path 2a of the second heat transfer tube 2 The second heat transfer tube 2 has a structure blocked by a crushing portion 9 c formed in the second heat transfer tube 2. However, in the crushing portion 9a of the lowermost first heat transfer tube 1 (second heat transfer tube from the bottom in FIG. 7B) of the laminated structure of the first heat transfer tube 1 and the second heat transfer tube 2, only the upper surface is provided. A first communication hole 3c is formed. With such a structure, the first refrigerant flowing from one of the two first ports 3 flows through the first refrigerant auxiliary flow path 1b and the first refrigerant flow path 1a of each first heat transfer tube 1 in the laminated structure. Then, it flows out from the other first port 3.

Further, the second communication hole 4c is penetrated through the crushing portion 9a formed in the uppermost first heat transfer tube 1, and the second port 4 is communicated with the second communication hole 4c. Further, in the second heat transfer tube 2 immediately below the first heat transfer tube 1, the raised portion 9d located immediately below the crushing portion 9a has second communication holes 4d formed on the upper and lower surfaces thereof. The second communication hole 4c of the crushing portion 9a formed in the first heat transfer tube 1 immediately above the second heat transfer tube 2 is inserted into the inside thereof via the second communication hole 4d on the upper surface of the raised portion 9d. It communicates with the formed second refrigerant auxiliary flow path 2b. The second refrigerant auxiliary flow path 2 b communicates with the second refrigerant flow path 2 a of the second heat transfer tube 2. Further, the second communication hole 4d formed in the lower surface of the raised portion 9d is formed through the crushing portion 9a located immediately below the raised portion 9d in the first heat transfer tube 1 immediately below the second heat transfer tube 2. The second communication hole 4c communicated. Furthermore, in the second heat transfer tube 2 immediately below the first heat transfer tube 1, the raised portion 9d located immediately below the crushing portion 9a has a second communication hole 4d penetrating through the upper surface and the lower surface, The second communication hole 4c communicates with the second refrigerant auxiliary flow path 2b formed therein via the second communication hole 4d on the upper surface of the raised portion 9d, and further the second heat transfer tube 2. To the second refrigerant flow path 2a.

That is, the second port 4 communicates with the second refrigerant flow path 2a of the second heat transfer pipe 2 immediately below the uppermost first heat transfer pipe 1, and further, the second refrigerant flow path 2a is directly below it. The first heat transfer tube 1 is further communicated with the second refrigerant flow path 2a of the second heat transfer tube 2 therebelow. Hereinafter, the same structure is taken, and the second refrigerant flow path 2a of the second port 4 and each of the second heat transfer tubes 2 has a communication structure, and the first refrigerant flow path 1a of the first heat transfer tube 1 The first heat transfer tube 1 has a structure blocked by a crushing portion 9a formed in the first heat transfer tube 1. However, in the crushing portion 9c, only the upper surface of the second heat transfer tube 2 (the lowermost heat transfer tube in FIG. 7B) of the laminated structure of the first heat transfer tube 1 and the second heat transfer tube 2 is second only. A communication hole 4d is formed. With such a structure, the second refrigerant flowing from one of the two second ports 4 flows through the second refrigerant auxiliary flow path 2b and the second refrigerant flow path 2a of each second heat transfer tube 2 in the laminated structure. Then, it flows out from the other second port 4.

As shown in FIG. 6 and FIG. 7B, the first refrigerant auxiliary flow channel 1b and the second refrigerant auxiliary flow channel 2b having a rectangular cross section are provided in the first heat transfer tube 1 and the second heat transfer tube 2, respectively. However, the present invention is not limited to this. For example, other shapes such as an ellipse may be used.

Further, as shown in FIG. 7, the first communication hole 3c formed in the raised portion 9b and the first communication hole 3d formed in the crushing portion 9c have the same diameter and are concentric in the stacking direction. However, the present invention is not limited to this, and the first refrigerant flow path 1a of each first heat transfer tube 1 may be formed so as not to have the same diameter or to be concentric in the stacking direction. May be formed to communicate with each other. Similarly, the second communication hole 4c formed in the crushed portion 9a and the second communication hole 4d formed in the raised portion 9d are formed in the same diameter and concentrically in the stacking direction. However, the present invention is not limited to this, and it may be formed not to have the same diameter or to be concentric in the stacking direction, and to be formed so that the second refrigerant flow paths 2a of the second heat transfer tubes 2 communicate with each other. What should be done. Moreover, each said hole is not limited to circular shape, You may form in other shapes, such as a rectangular shape.

(Manufacturing method of heat exchanger 10a)
FIG. 8 is a diagram showing a method of manufacturing the heat exchanger 10a that is a stacked heat exchanger according to Embodiment 2 of the present invention.
The first heat transfer tube 1 and the second heat transfer tube 2 of the heat exchanger 10 of the present embodiment shown in FIG. 8 are made of a material having good heat conductivity, for example, aluminum alloy, copper, stainless steel, etc. After bending by roll forming or the like, by forming the seam at both ends of this flat plate by electro-sewing (welding), by rolling or press forming the cylinder, or by extrusion or pultrusion Manufactured.

Next, in a region having a predetermined length from the first heat transfer tube end portion 5 to the inside of the first heat transfer tube 1, when viewed from the penetration direction of the first refrigerant flow path 1 a, one end portion to the other end in the longitudinal direction thereof. A portion up to the middle is crushed from the vertical direction in FIG. 8 to form a crushed portion 9a. A part of the opening of the first refrigerant flow path 1a is closed by the crushing portion 9a. Similarly, in the first heat transfer tube end portion 5 opposite to the first heat transfer tube end portion 5 in which the crushing portion 9a is formed, the crushing portion 9a is formed, and at this time, two crushing portions are formed. 9a is formed so that it may become a diagonal position seeing from the upper surface of the 1st heat exchanger tube 1. As shown in FIG.

Next, the central portion sandwiched between the two crushing portions 9a of the first heat transfer tube 1 is so sized that the first refrigerant flow path 1a inside the first heat transfer tube 1 is not crushed and disappears in FIG. As a result, the swelled portion 9b is formed such that the other end side portion that is not crushed when the crushed portion 9a is formed is swelled from the central portion. Two raised portions 9b are formed corresponding to the two crushed portions 9a, and are formed so as to be diagonally positioned when viewed from the upper surface of the first heat transfer tube 1.

Similarly, in the second heat transfer tube 2, a crushing portion 9 c corresponding to the crushing portion 9 a and a rising portion 9 d corresponding to the rising portion 9 b are formed on the second heat transfer tube end portions 6 on both sides. The

At this stage, the crushing portion 9a blocks a part of the opening of the first refrigerant flow path 1a of the first heat transfer tube 1, whereas the swelled portion 9b is open, Is formed with a first refrigerant auxiliary channel 1b communicating with the first refrigerant channel 1a. Similarly, the crushing portion 9c blocks a part of the opening of the second refrigerant flow path 2a of the second heat transfer tube 2, whereas the swelled portion 9d is open, Is formed with a second refrigerant auxiliary channel 2b communicating with the second refrigerant channel 2a.

Next, as described above, the crushing portion 9a and the raised portion 9b are formed for the first heat transfer tube 1, and the crushing portion 9c and the raised portion 9d are formed for the second heat transfer tube 2. In this state, the laminated structure is formed as follows for the first heat transfer tube 1 and the second heat transfer tube 2. That is, the crushing portion 9a of the first heat transfer tube 1 and the bulging portion 9d of the second heat transfer tube 2 overlap so that the crushing portion 9d of the first heat transfer tube 1 and the crushing portion 9c of the second heat transfer tube 2 are overlapped. They are stacked so that they overlap. At this time, the central portions of the first heat transfer tube 1 and the second heat transfer tube 2 are brazed to each other by the brazing material 21 and joined. The crushing portion 9a and the raised portion 9d are brazed with the brazing material 21, and similarly, the raised portion 9b and the crushing portion 9c are also brazed with the brazing material 21 and joined thereto.
In addition, as mentioned above, when each center part of the 1st heat exchanger tube 1 and the 2nd heat exchanger tube 2 mutually joined, it is between the crushing part 9a and the swelling part 9d, or crushing with the swelling part 9b. If there is a gap between the portion 9c, the brazing material 21 may be filled into the gap and brazed. Similarly, when joining the crushing part 9a and the raised part 9d, and the raised part 9b and the crushing part 9c, between the central part of the first heat transfer tube 1 and the central part of the second heat transfer tube 2, When there is a gap, the brazing material 21 may be filled into the gap and brazed.

Further, as shown in FIG. 8A, the opening of the raised portion 9 b of the first heat transfer tube 1 and the opening of the raised portion 9 d of the second heat transfer tube 2 are respectively closed by the lid 13. As shown in FIG. 8A, the lid 13 includes a rectangular parallelepiped heat transfer tube insertion portion 13 a erected vertically with respect to one surface of the lid 13. As described above, when the opening of the raised portion 9b of the first heat transfer tube 1 and the opening of the raised portion 9d of the second heat transfer tube 2 are respectively closed by the lid 13, the respective openings are covered with the lid 13. The heat transfer tube insertion portion 13a is inserted, and the lid 13 is joined to each opening portion by the brazing material 21 to be closed. This prevents the refrigerant from leaking from the opening portions of the raised portion 9b and the raised portion 9d.

Further, as shown in FIG. 8B, the upper surface of each raised portion 9b of the first heat transfer tube 1 which is the uppermost heat transfer tube of the laminated structure of the first heat transfer tube 1 and the second heat transfer tube 2 is formed on the upper surface. The tubular first port 3 is brazed with a brazing material (not shown), and the tubular second port 4 is brazed with the brazing material on the upper surface of each crushing portion 9a of the first heat transfer tube 1. Installed. As described above, the first port 3 is configured to communicate with the first refrigerant auxiliary flow path 1b and the first refrigerant flow path 1a of all the first heat transfer tubes 1, and the second port 4 is The second refrigerant auxiliary flow path 2b and the second refrigerant flow path 2a of all the second heat transfer tubes 2 are configured to communicate with each other.

The heat exchanger 10a, which is a stacked heat exchanger, is configured by the above method.

In addition, about the swelling part 9b of the 1st heat exchanger tube 1, the 1st refrigerant | coolant flow path 1a inside the 1st heat exchanger tube 1 crushes the center part pinched | interposed into the two crushing parts 9a of the 1st heat exchanger tube 1. However, it is formed by crushing from the vertical direction in FIG. 8 to such an extent that it does not disappear, but it is not limited to this. That is, when the crushing portion 9a is formed, the opening portion of the first refrigerant flow path 1a in the first heat transfer tube end portion 5 that is not blocked is expanded from the inside to the outside, so that the rising portion 9b is It may be formed. The same applies to the formation of the raised portion 9d of the second heat transfer tube 2.

Further, as shown in FIG. 8 (a), the first heat transfer tube 1 is formed with a raised portion 9b having a shape that is raised in the vertical direction with respect to the center portion sandwiched between the two crushed portions 9a. However, the present invention is not limited to this. That is, it is not necessary to form the raised portion 9b so as to rise in the vertical direction rather than the central portion of the first heat transfer tube 1, and the upper surface and the lower surface of the central portion are substantially the same as the upper surface and the lower surface of the raised portion 9b, respectively. It is good also as what forms so that it may become flush. The same applies to the formation of the raised portion 9d of the second heat transfer tube 2. At this time, when the first heat transfer tube 1 and the second heat transfer tube 2 are stacked, a gap is generated between the crushing portion 9a and the rising portion 9d and between the rising portion 9b and the crushing portion 9c. Each of the gaps may be joined by filling the gap 21 with the brazing filler metal 21.

Further, as shown in FIG. 8A, the opening of the raised portion 9b of the first heat transfer tube 1 and the opening of the raised portion 9d of the second heat transfer tube 2 are closed by the lid 13. However, the present invention is not limited to this. That is, it is good also as a structure which is crushed and block | closed the edge part of the opening part of the swelling part 9b to such an extent that the 1st refrigerant | coolant auxiliary flow path 1b inside the swelling part 9b does not lose | disappear. The same applies to the opening of the raised portion 9d of the second heat transfer tube 2. As a result, the lid 13 becomes unnecessary, the number of parts can be reduced, and the heat exchanger 10a can be reduced in weight.

The lid 13 corresponds to the “closing means” of the present invention.

(Heat exchange operation of the heat exchanger 10a)
The heat exchanger 10a, which is a stacked heat exchanger according to the present embodiment, is mounted on a heat pump system that uses hot or cold heat. For example, in the case of an operation using warm heat, the high-temperature first refrigerant flowing from the refrigerant circuit flows into the heat exchanger 10a from one first port 3 and rises 9b of each first heat transfer tube 1. It flows into the first refrigerant auxiliary flow path 1b inside, and flows through the first refrigerant flow path 1a of each first heat transfer tube 1 and the first refrigerant auxiliary flow path 1b inside the other rising portion 9b, Outflow from the other first port 3. Further, the second refrigerant flowing from the use side circuit flows into the heat exchanger 10 from the one second port 4, and the second refrigerant auxiliary flow path 2 b inside the rising portion 9 d of each second heat transfer tube 2. And flows through each second refrigerant flow path 2a and the second refrigerant auxiliary flow path 2b inside the other raised portion 9d and flows out from the other second port 4. At this time, the first refrigerant and the second refrigerant flow in a counterflow or parallel flow through the first refrigerant flow path 1a of the first heat transfer tube 1 and the second refrigerant flow path 2a of the second heat transfer tube 2, respectively. The heat exchange is carried out through the wall surfaces of the first heat transfer tube 1 and the second heat transfer tube 2.

(Effect of Embodiment 2)
The heat exchanger described in Patent Document 1 has a dead space due to a header pipe that distributes the refrigerant to each heat transfer pipe, and has reduced space efficiency. By connecting the first refrigerant flow path 1a of each first heat transfer tube 1 from the port 3 and communicating the second refrigerant flow path 2a of each second heat transfer tube 2 from the second port 4, no header pipe is required. The dead space can be reduced, and the entire heat exchanger 10a can be made compact.

Also, by alternately laminating the first heat transfer tubes 1 and the second heat transfer tubes 2, the heat exchange efficiency between the first refrigerant and the second refrigerant can be improved. Furthermore, the 1st heat exchanger tube 1 and the 2nd heat exchanger tube 2 are made into the substantially same length in the distribution direction of the refrigerant | coolant of the refrigerant | coolant flow path, and the width direction of a refrigerant | coolant flow path. Can be more effectively carried out, and the entire heat exchanger 10a can be made compact.

Further, in the uppermost heat transfer tube (the first heat transfer tube 1 in FIGS. 6 and 7) of the stacked structure of the heat exchanger 10a, the two first ports 3 are configured to be diagonal positions. Since the two second ports 4 are installed on the upper surface of the crushing portion 9a configured to be in a diagonal position, each of the first refrigerant channels 1a and The length of the flow path through which the refrigerant flows in each second refrigerant flow path 2a can be made substantially long, and the heat exchange efficiency between the first refrigerant and the second refrigerant can be further improved.
However, it is not limited to installing the first port 3 and the second port 4 at the above positions, and the positions of the first port 3 and the second port 4 depending on the mounting position of the heat exchanger 10a in the heat pump system or the like. In this case, the first port 3 communicates with the communication hole 8b in the heat transfer tube insertion portion 8a inserted into the second refrigerant flow path 2a, and the second port 4 It is necessary to communicate with the communication hole 8b in the heat transfer tube insertion portion 8a inserted into the one refrigerant flow path 1a.
Further, as shown in FIGS. 6 and 7, the two first ports 3 and the second ports 4 are configured to be installed on the upper surface of the uppermost heat transfer tube of the laminated structure of the heat exchanger 10a, respectively. This is not limited. For example, one of the two first ports 3 may be installed on the upper surface of the uppermost heat transfer tube of the laminated structure, and the other may be installed on the lower surface of the lowermost heat transfer tube. The same applies to the two second ports 4. The first port 3 and the second port 4 may not be installed on the same surface. For example, the two first ports 3 may be installed on the upper surface of the uppermost heat transfer tube of the laminated structure, and the two second ports 4 may be installed on the lower surface of the lowermost heat transfer tube of the laminated structure.

Further, a crushing portion 9a is formed for the opening portion of the first refrigerant flow path 1a of the first heat transfer tube 1, and a crushing portion 9c is formed for the opening portion of the second refrigerant auxiliary flow path 2b of the second heat transfer tube 2. As a result, the first refrigerant flow path 1a and the second refrigerant flow path 2a are not cut off and communicated, and the first refrigerant flowing through the first refrigerant flow path 1a and the second refrigerant flow path 2a It is possible to prevent the second refrigerant flowing through the refrigerant from being mixed.

Embodiment 3 FIG.
FIG. 9 is a cross-sectional view of a heat transfer tube of a stacked heat exchanger according to Embodiment 3 of the present invention. Hereinafter, the configuration of the heat transfer tube of the stacked heat exchanger according to the present embodiment will be described with reference to FIG.

All of the heat transfer tubes shown in FIGS. 9 (a) to 9 (d) have a flat cross section. The heat transfer tube 14a shown in FIG. 9A has a rectangular cross section, and the cross sectional shape of the refrigerant flow path inside thereof is also rectangular. Further, the heat transfer tube 14b shown in FIG. 9 (b) has a cross-sectional shape in which both end portions in the longitudinal direction are R-shaped, and the cross-sectional shape of the refrigerant flow path inside the heat-transfer tube 14b has a similar shape. Since both the heat transfer tube 14a and the heat transfer tube 14b have a flat upper surface and a lower surface and can be bonded to each other in a laminated structure, the heat exchange efficiency can be improved.

Further, the cross section of the heat transfer tube 14c shown in FIG. 9C is R-shaped at both ends in the longitudinal direction, and the cross-sectional shape of the refrigerant flow path inside thereof is the same shape. However, unlike the heat transfer tube 14b, a plurality of linear grooves 15 are formed on the inner wall surface, which is the refrigerant flow path, in the direction from one opening to the other opening of the heat transfer tube 14c. By forming the groove 15, the area of the inner wall surface of the heat transfer tube 14 c is increased, and the efficiency of heat exchange with the refrigerant flowing in the adjacent heat transfer tube can be improved. Further, as described above, the pressure loss of the refrigerant can be reduced by setting the direction of the groove 15 to be the direction from one opening of the heat transfer tube 14c toward the other opening. Moreover, it cannot be overemphasized that it also has the effect of the heat exchanger tube 14a and the heat exchanger tube 14b mentioned above.

As described above, the groove 15 is formed on the inner wall surface of the refrigerant flow path of the heat transfer tube 14c from the one opening to the other opening. However, the present invention is not limited to this. For example, the groove 15 may be formed in a wavy line or an oblique line. As a result, the area of the inner wall surface of the heat transfer tube 14c is increased, the efficiency of heat exchange with the refrigerant flowing in the adjacent heat transfer tubes can be improved, turbulence can be generated in the flow of the refrigerant, and heat exchange Efficiency can be improved.

And as for the heat exchanger tube 14d shown by FIG.9 (d), the cross section makes the both ends in a longitudinal direction R shape, and the cross-sectional shape of the refrigerant flow path inside becomes the same shape. However, unlike the heat transfer tube 14b, the corrugated plate 16 is inserted into the refrigerant flow path inside. Further, the corrugated plate 16 is installed so that the ridge line direction in the wave shape of the corrugated plate 16 is a direction from one opening of the heat transfer tube 14d toward the other opening. Moreover, each convex part in the wave shape of the corrugated plate 16 is in contact with the inner wall surface of the heat transfer tube 14d. By inserting the corrugated plate 16, the refrigerant flowing through the refrigerant flow path contacts the inner wall surface, and also contacts the corrugated plate 16, so that hot or cold heat is transmitted to the inner wall surface via the corrugated plate 16. Therefore, it has the effect similar to the effect by having increased the area of the inner wall surface like the heat exchanger tube 14c, ie, the effect which the heat exchange efficiency with the refrigerant | coolant which flows into the adjacent heat exchanger tube improves. Moreover, it cannot be overemphasized that it also has the effect of the heat exchanger tube 14a and the heat exchanger tube 14b mentioned above.

Any one of the heat transfer tubes 14a to 14d shown in FIG. 9 is used as the first heat transfer tube 1 and the second heat transfer tube in the heat exchanger 10 according to the first embodiment or the heat exchanger 10a according to the second embodiment. It shall be applied as the heat tube 2, and the following effects can be obtained thereby. Further, any one of 14a to 14d shown in FIG. 9 is replaced with the first heat transfer tube 1 and the second heat transfer tube 2 in the heat exchanger 10 according to the first embodiment or the heat exchanger 10a according to the second embodiment. The heat exchanger 10 and the heat exchanger 10a configured as described above are collectively referred to as a heat exchanger 10b.

The heat exchanger 10b corresponds to the “stacked heat exchanger” of the present invention.

(Effect of Embodiment 3)
Each of the heat transfer tubes 14a to 14d shown in FIG. 9 has an upper surface and a lower surface that are flat, and can be bonded in close contact with each other in the case of a laminated structure, thereby improving heat exchange efficiency. be able to.

Further, as shown in FIG. 9C, the groove 15 is formed on the inner wall surface of the refrigerant flow path of the heat transfer tube 14c, so that the area of the inner wall surface of the heat transfer tube 14c increases, and the adjacent heat transfer tube Heat exchange efficiency with the flowing refrigerant can be improved. Moreover, the pressure loss of a refrigerant | coolant can be reduced by making the direction of this groove | channel 15 become a direction which goes to the other opening part from one opening part of the heat exchanger tube 14c. Further, when the groove 15 is formed in a wavy line or a diagonal line, the area of the inner wall surface of the heat transfer tube 14c increases, and the heat exchange efficiency with the refrigerant flowing in the adjacent heat transfer tube can be improved. In addition, turbulent flow can be generated in the refrigerant flow, and heat exchange efficiency can be improved.

Further, as shown in FIG. 9 (d), by inserting the corrugated plate 16 into the refrigerant flow path inside the heat transfer tube 14d, in addition to the refrigerant flowing through the refrigerant flow path being in contact with the inner wall surface, the waveform By contacting the plate 16, heat or cold is transmitted to the inner wall surface via the corrugated plate 16, so that the efficiency of heat exchange with the refrigerant flowing in the adjacent heat transfer tube is improved.

Embodiment 4 FIG.
(Configuration of heat pump system)
FIG. 10 is a configuration diagram of a heat pump system using the heat of the heat exchanger according to Embodiment 4 of the present invention. Hereinafter, a configuration in which the heat exchanger 10 according to Embodiment 1 as a stacked heat exchanger that performs heat exchange between the first refrigerant and the second refrigerant is mounted will be described with reference to FIG. 10.

As shown in FIG. 10, the heat pump system according to the present embodiment includes a first refrigerant circuit 100 through which the first refrigerant flows, a second refrigerant circuit 101 through which the second refrigerant flows, and the first refrigerant and the second refrigerant. It is the structure provided with the heat exchanger 10 which performs heat exchange with a refrigerant | coolant.

The first refrigerant circuit 100 is configured by connecting a compressor 31, a heat exchanger 10, an expansion valve 33, and an outdoor heat exchanger 34 in this order by refrigerant piping. Further, a fan 39 is installed near the outdoor heat exchanger 34 to send outside air to the outdoor heat exchanger 34 and to perform heat exchange between the outside air and the first refrigerant circulating in the outdoor heat exchanger 34. Has been. In the first refrigerant circuit 100, for example, R410A, another chlorofluorocarbon refrigerant, or a natural refrigerant such as carbon dioxide or hydrocarbon may be used as the first refrigerant.

The second refrigerant circuit 101 is configured by connecting the pump 36, the use side heat exchanger 35, and the heat exchanger 10 in order by refrigerant piping. Among these, the use side heat exchanger 35 is used as a radiator or a floor heater. Moreover, what is necessary is just to use the natural refrigerant | coolant, such as a CFC-type refrigerant | coolant, a carbon dioxide, or a hydrocarbon, or tap water, distilled water, a brine, etc. as this 2nd refrigerant | coolant for this 2nd refrigerant circuit 101.

The outdoor heat exchanger 34 corresponds to the “heat source side heat exchanger” of the present invention.

(Operation of heat pump system)
Next, the operation of the heat pump system according to the present embodiment will be described with reference to FIG. In the first refrigerant circuit 100, the high-temperature and high-pressure gaseous first refrigerant compressed and discharged by the compressor 31 flows into the heat exchanger 10. The first refrigerant that has flowed into the heat exchanger 10 exchanges heat with the second refrigerant that flows in a counterflow or parallel flow with respect to the first refrigerant in the heat exchanger 10, so that the second refrigerant On the other hand, it radiates heat and flows out of the heat exchanger 10. The first refrigerant flowing out of the heat exchanger 10 flows into the expansion valve 33, and is expanded and depressurized by the expansion valve 33 to become a low temperature and low pressure first refrigerant. This low-temperature and low-pressure first refrigerant flows into the outdoor heat exchanger 34, exchanges heat with the outside air sent by the rotational drive of the fan 39, and becomes a low-temperature and low-pressure gas-state first refrigerant. It flows out of the heat exchanger 34. The first refrigerant in the gas state flowing out from the outdoor heat exchanger 34 flows into the compressor 31 and is compressed again.

On the other hand, in the second refrigerant circuit 101, the second refrigerant that has flowed into the heat exchanger 10 heats the first refrigerant and the heat flowing inside the heat exchanger 10 so as to be opposed or parallel to the second refrigerant. Exchange is performed, heated by the first refrigerant, and flows out of the heat exchanger 10. The second refrigerant flowing out of the heat exchanger 10 is circulated through the second refrigerant circuit 101 by the pump 36 and flows into the use side heat exchanger 35. The second refrigerant that has flowed into the use side heat exchanger 35 radiates heat to the outside and flows out of the use side heat exchanger 35. The second refrigerant flowing out from the use side heat exchanger 35 flows into the heat exchanger 10 again and is heated.

Here, in the case where water is used as the second refrigerant flowing through the second refrigerant circuit 101, the second heat transfer tube 2 and the second port 4 in the heat exchanger 10 are formed of a corrosion-resistant material. It is desirable that the portion in contact with water has a corrosion resistance against water.

Note that the heat pump system shown in FIG. 10 is configured to be mounted with the heat exchanger 10 according to the first embodiment, but is not limited to this, and the heat exchanger 10a according to the second embodiment or It is good also as a structure by which the heat exchanger 10b which concerns on Embodiment 3 is mounted.

(Effect of Embodiment 4)
By mounting the heat exchanger 10, the heat exchanger 10a, or the heat exchanger 10b having a laminated structure of the first heat transfer tube 1 and the second heat transfer tube 2 as described above, the first refrigerant and the second refrigerant are mounted. It is possible to obtain a heat pump system that improves the efficiency of heat exchange with.
Further, it goes without saying that the effects described in the first to third embodiments are obtained.

It should be noted that the heat pump system according to the present embodiment is not limited to the configuration shown in FIG. 10, and may be, for example, the configuration of the heat pump system shown in FIGS. 11 to 13 below.

First, FIG. 11 is a configuration diagram of another form of the heat pump system according to the present embodiment, and uses the heat of the heat exchanger similarly to the heat pump system shown in FIG. 10.

The heat pump system shown in FIG. 11 has a use-side heat exchanger 35 in the heat pump system shown in FIG. 10 installed in a tank 38, and the other configurations are the same as those of the heat pump system shown in FIG. . The 2nd refrigerant | coolant heated in the heat exchanger 10 becomes a structure which can heat and take in the water in the tank 38 by distribute | circulating the utilization side heat exchanger 35. FIG.

As in the heat pump system shown in FIG. 11 and the heat pump system shown in FIG. 10 described above, the use-side heat exchanger 35 is applied to the heating operation or the hot water supply operation using the heat of the heat exchanger 10. Thus, the energy saving effect can be improved as compared with a heating or hot water supply system using a conventional boiler as a heat source.

Moreover, FIG. 12 is a block diagram of another form of the heat pump system according to the present embodiment, and uses the cold energy of the heat exchanger.
The heat pump system shown in FIG. 12 is configured so that the suction port and the discharge port of the compressor 31 are reversed and the refrigerant flow direction in the first refrigerant circuit 100 is reversed in the heat pump system shown in FIG. It is a thing. Moreover, in order to comprise a cooling system, the use side heat exchanger 35 is used as an air heat exchanger or a cold water panel. Other configurations are the same as those of the heat pump system shown in FIG.

In the heat pump system shown in FIG. 12, first, in the first refrigerant circuit 100, the first refrigerant in a high-temperature and high-pressure gas state compressed and discharged by the compressor 31 flows into the outdoor heat exchanger. The first refrigerant flowing into the outdoor heat exchanger 34 exchanges heat with the outside air sent by the rotational drive of the fan 39, dissipates heat to the outside air, and flows out of the outdoor heat exchanger 34. The first refrigerant that has flowed out of the outdoor heat exchanger 34 flows into the expansion valve 33, is expanded and depressurized by the expansion valve 33, and becomes a low-temperature and low-pressure first refrigerant. This low-temperature and low-pressure first refrigerant flows into the heat exchanger 10 and performs heat exchange with the second refrigerant that flows in a counterflow or parallel flow with respect to the first refrigerant in the heat exchanger 10. Then, it absorbs heat from the second refrigerant, becomes a first refrigerant in a low-temperature and low-pressure gas state, and flows out of the heat exchanger 10. The first refrigerant in a gas state flowing out from the heat exchanger 10 flows into the compressor 31 and is compressed again.

Then, in the second refrigerant circuit 101, the second refrigerant that has flowed into the heat exchanger 10 heats the first refrigerant and the heat flowing in the heat exchanger 10 so as to be opposed or parallel to the second refrigerant. Exchange is performed, cooled by the first refrigerant, and flows out of the heat exchanger 10. The second refrigerant flowing out of the heat exchanger 10 is circulated through the second refrigerant circuit 101 by the pump 36 and flows into the use side heat exchanger 35. The second refrigerant that has flowed into the use side heat exchanger 35 cools outside air and the like, and flows out of the use side heat exchanger 35. The second refrigerant flowing out of the use side heat exchanger 35 flows into the heat exchanger 10 again and is cooled.

In addition, it is good also as a structure which installs the tank 38 with respect to the heat pump system shown by this FIG. 12, and installs the utilization side heat exchanger 35 in this tank 38 similarly to the heat pump system shown by FIG. In this case, it can be set as the structure which cools the water in the tank 38 with the utilization side heat exchanger 35, and takes water.

And FIG. 13 is a block diagram of another form of the heat pump system which concerns on this Embodiment, and utilizes the warmth or cold by a heat exchanger.
The heat pump system shown in FIG. 13 is obtained by adding a four-way valve 32 to the first refrigerant circuit 100 in the heat pump system shown in FIG. Specifically, the first refrigerant circuit 100 is connected by refrigerant piping in the order of the compressor 31, the four-way valve 32, the heat exchanger 10, the expansion valve 33, the outdoor heat exchanger 34, the four-way valve 32, and the compressor 31. It has been done. Other configurations are the same as those of the heat pump system shown in FIG. In such a configuration, by switching the flow path of the four-way valve 32, the heat of the heat exchanger 10 is used like the heat pump system shown in FIG. 10, or the heat like the heat pump system shown in FIG. The cold heat of the exchanger 10 can be used.

In addition, it is good also as a structure which installs the tank 38 and installs the utilization side heat exchanger 35 in this tank 38 similarly to the heat pump system shown in FIG. In this case, by switching the flow path of the four-way valve 32, the second refrigerant heated in the heat exchanger 10 can be circulated through the use side heat exchanger 35 to heat the water in the tank 38 and take water. Alternatively, the second refrigerant cooled in the heat exchanger 10 can be circulated through the use-side heat exchanger 35 to cool the water in the tank 38 and take water.

The heat pump system shown in FIGS. 11 to 13 is configured to be mounted with the heat exchanger 10 according to the first embodiment, but is not limited to this, and the heat exchange according to the second embodiment is performed. It is good also as a structure by which the heat exchanger 10b which concerns on the apparatus 10a or Embodiment 3 is mounted.

1 1st heat transfer pipe, 1a 1st refrigerant flow path, 1b 1st refrigerant auxiliary flow path, 2nd 2nd heat transfer pipe, 2a 2nd refrigerant flow path, 2b 2nd refrigerant auxiliary flow path, 3rd first port, 3a-3d 1st communication hole, 4 2nd port, 4a-4d 2nd communication hole, 5 1st heat transfer tube end, 6 2nd heat transfer tube end, 8 lid, 8a heat transfer tube insertion part, 8b communication hole, 9a crushing Part, 9b raised part, 9c crushing part, 9d raised part, 10, 10a, 10b heat exchanger, 13 lid, 13a heat transfer tube insertion part, 14a-14d heat transfer tube, 15 groove, 16 corrugated plate, 21 brazing material, 31 compressor, 32 four-way valve, 33 expansion valve, 34 outdoor heat exchanger, 35 use side heat exchanger, 36 pump, 38 tank, 39 fan, 100 first refrigerant circuit, 101 second refrigerant circuit.

Claims

A plurality of first heat transfer tubes having a flat shape, wherein the first refrigerant flows through the first refrigerant flow path therein;
A plurality of second heat transfer tubes having a flat shape, stacked alternately in contact with the first heat transfer tubes, and having a second refrigerant having a temperature different from that of the first refrigerant flowing through a second refrigerant flow path therein; ,
In the first heat transfer tube and the second heat transfer tube, the first heat transfer tubes or the second heat transfer tubes that communicate with the first refrigerant flow paths and are positioned at both ends in the stacking direction in the stacked structure. Two sets of first communication holes formed so as to penetrate the first refrigerant flow path and the outside in any one of the two outermost heat transfer tubes;
In the first heat transfer tube and the second heat transfer tube, the second refrigerant flow paths are communicated with each other, and the second refrigerant flow path is provided in one of the two outermost heat transfer pipes. Two sets of second communication holes formed so as to communicate with the outside and the outside,
Closure means for closing the first refrigerant flow path of each of the first heat transfer tubes and the openings formed at both ends of the refrigerant flow direction of the second refrigerant flow channels of the second heat transfer tubes;
First blocking means for blocking the first communication hole formed in each of the second heat transfer tubes so as not to communicate with the second refrigerant flow path;
A second blocking means for blocking the second communication hole formed in each first heat transfer tube so as not to communicate with the first refrigerant flow path;
With
The two first communication holes that are formed in the outermost heat transfer pipe and communicate with the refrigerant flow path inside the outermost heat transfer pipe and the outside function as an inlet and an outlet of the first refrigerant, respectively.
The two second communication holes that are formed in the outermost heat transfer pipe and communicate with the refrigerant flow path inside the outermost heat transfer pipe and the outside function as an inlet and an outlet of the second refrigerant, respectively.
A stacked heat exchanger that performs heat exchange between the first refrigerant and the second refrigerant through contact surfaces of the first heat transfer pipe and the second heat transfer pipe.
The blocking means is inserted into a part of each of the first refrigerant flow path and the second refrigerant flow path, and has a heat transfer tube insertion portion formed through an insertion portion communication hole,
The first shut-off means is configured by the heat transfer tube insertion portion inserted into each second refrigerant flow path, and the insertion portion communication hole of each heat transfer tube insertion portion communicates with each first communication hole. ,
The second shut-off means is configured by the heat transfer tube insertion portion inserted into each first refrigerant flow path, and the insertion portion communication hole of each heat transfer tube insertion portion communicates with each second communication hole. The stacked heat exchanger according to claim 1.
The first shut-off means is formed by a crushing portion formed by crushing a part of the opening of each second heat transfer tube and having the first communication hole in the stacking direction. The first communication hole in the portion is formed so as not to communicate with the second refrigerant flow path,
The second blocking means is formed by a crushing part formed by crushing a part of the opening of each first heat transfer tube and having the second communication hole in the stacking direction. The stacked heat exchanger according to claim 1, wherein the second communication hole in the section is formed so as not to communicate with the first refrigerant flow path.
The first heat transfer tube and the second heat transfer tube have the same length in the flow direction of the refrigerant in the refrigerant flow path and in the width direction of the refrigerant flow path. The laminated heat exchanger according to item.
The first communication hole and the second communication hole are formed in the first heat transfer tube and the second heat transfer tube in the vicinity of both ends of the refrigerant flow direction of the refrigerant flow path. The stacked heat exchanger according to any one of the above.
6. The two sets of first communication holes and the two sets of second communication holes are formed at positions diagonal to the first heat transfer tube and the second heat transfer tube, respectively, when viewed from the stacking direction. The laminated heat exchanger as described.
The first refrigerant channel of the first heat transfer tube or the second refrigerant channel of the second heat transfer tube has a plurality of grooves on an inner wall surface thereof. The laminated heat exchanger according to item.
A corrugated plate is installed in the first refrigerant channel of the first heat transfer tube or the second refrigerant channel of the second heat transfer tube,
The corrugated plate has a corrugated ridge direction that is the same as a flow direction of the refrigerant in the first refrigerant flow path or the second refrigerant flow path, and each convex portion in the wave shape has the first refrigerant flow path or The stacked heat exchanger according to any one of claims 1 to 6, wherein the stacked heat exchanger is in contact with an inner wall surface of the second refrigerant channel.
The first refrigerant is a natural refrigerant such as R410A, a fluorocarbon refrigerant, carbon dioxide, or hydrocarbon,
The stacked heat exchanger according to any one of claims 1 to 8, wherein the second refrigerant is water or brine.
A compressor, the stacked heat exchanger according to any one of claims 1 to 9, an expansion device, and a heat source side heat exchanger are configured by a refrigerant circuit connected by a refrigerant pipe, and the first refrigerant is A first refrigerant circuit that circulates;
A second refrigerant circuit in which a pump, a use-side heat exchanger, the stacked heat exchanger is constituted by a refrigerant circuit connected by a refrigerant pipe, and the second refrigerant flows;
With heat pump system.
The heat pump system according to claim 10, further comprising a tank in which the use side heat exchanger is provided, and water in the inside is heated or cooled by the use side heat exchanger.