WO2012104944A1

WO2012104944A1 - Heat exchanger, method for manufacturing the heat exchanger, and refrigeration cycle device with the heat exchanger

Info

Publication number: WO2012104944A1
Application number: PCT/JP2011/006338
Authority: WO
Inventors: 浩昭中宗; 寿守務吉村; 瑞朗酒井
Original assignee: 三菱電機株式会社
Priority date: 2011-01-31
Filing date: 2011-11-14
Publication date: 2012-08-09
Also published as: GB2501413B; JP5490265B2; JPWO2012104944A1; GB2501413A; GB201311658D0

Abstract

A heat exchanger (100) is provided with: heat transfer members (1) in which refrigerant conduits (3) serving as the conduits for a first refrigerant are formed; and heat transfer tubes (2) serving as the conduits for a second refrigerant. Each of the heat transfer members (1) has fitting grooves (4a, 4b) which are formed in the upper surface and the lower surface of the heat transfer member (1) and in which heat transfer tubes are fitted. The heat exchanger (100) is formed by stacking the heat transfer members (1), and adjacent heat transfer members (1) are connected while the heat transfer tubes (2) are fitted in the fitting grooves (4a, 4b).

Description

Heat exchanger, method for manufacturing the heat exchanger, and refrigeration cycle apparatus including the heat exchanger

The present invention relates to a heat exchanger for exchanging heat between a first refrigerant and a second refrigerant, a method for manufacturing the heat exchanger, and a refrigeration cycle apparatus including the heat exchanger.

Conventionally, a heat exchanger in which heat exchange between the first refrigerant and the second refrigerant has been proposed. As such a conventional heat exchanger, for example, “this heat exchanger 1 includes an aluminum extruded tube 2 connected between the refrigerant inlet side tank 11 and the refrigerant outlet side tank 12, and an inlet for tap water. A stainless molded tube 3 connected between the side header 13 and the outlet header 14 for tap water, and the aluminum extruded tube 2 and the stainless molded tube 3 are joined by means such as sawlock or vacuum brazing. Has been proposed (for example, Patent Document 1).

JP 2001-153571 (paragraph 0026, FIG. 1)

In a conventional heat exchanger, an aluminum extruded tube through which a refrigerant (corresponding to a first refrigerant) flows and a stainless steel tube through which tap water (corresponding to a second refrigerant) flows are joined by brazing or the like. For this reason, when the void generate | occur | produced in the brazing layer which joins both tubes, the conventional heat exchanger had the subject that the thermal joining degree of both tubes deteriorated and heat exchange performance fell.

The present invention has been made to solve the above-described problems, and a heat exchanger with good heat exchange performance that can prevent deterioration in heat transfer performance due to the degree of thermal joining of the joint surfaces. It aims at obtaining the manufacturing method and the refrigerating-cycle apparatus provided with this heat exchanger.

The heat exchanger according to the present invention includes a plurality of heat transfer members in which a plurality of through holes serving as flow paths for the first refrigerant are formed, and a plurality of heat transfer tubes serving as flow paths for the second refrigerant, The heat transfer member includes a first surface portion and a second surface portion formed on the opposite side of the first surface portion on an outer peripheral portion thereof, and heat transfer tubes are fitted to the first surface portion and the second surface portion. A mating groove is formed, and the plurality of heat transfer members are stacked so that the first surface portion and the second surface portion face each other, and the adjacent heat transfer members are arranged to face each other. The heat transfer tube is fitted and connected to a fitting groove formed in the second surface portion.

Moreover, the manufacturing method of the heat exchanger which concerns on this invention is a manufacturing method of said heat exchanger, Comprising: Between the several heat-transfer member arrange | positioned facing the 1st surface part and the 2nd surface part, Heat transfer tubes are arranged, these are pressed in the stacking direction of the heat transfer members, the heat transfer tubes are fitted into the fitting grooves, and the heat transfer members are connected.

Further, a refrigeration cycle apparatus according to the present invention includes the above heat exchanger.

In the present invention, since the outer peripheral surface (heat transfer surface) of the heat transfer tube provided between them can be adhered and covered by the adjacent heat transfer members, the heat transfer surface of the heat transfer tube can be used effectively. Can do. Further, the adjacent heat transfer members do not contribute to heat exchange at the joint surfaces (the surfaces facing each other). For this reason, in the present invention, since brazing or the like is not necessary, a high-performance heat exchanger that can prevent a decrease in heat transfer performance due to the degree of thermal bonding of the conventional bonding surfaces, a method for manufacturing the heat exchanger, and the A refrigeration cycle apparatus including a heat exchanger can be provided.

It is a perspective view which shows the unit heat exchange unit of the heat exchanger which concerns on Embodiment 1 of this invention. It is a perspective view which shows the heat exchanger which concerns on Embodiment 1 of this invention. It is a perspective view which shows the unit heat exchange unit of the heat exchanger which concerns on Embodiment 2 of this invention. It is a perspective view which shows the heat exchanger which concerns on Embodiment 3 of this invention. It is a perspective view (main part enlarged view) which shows the unit heat exchange unit of the heat exchanger which concerns on Embodiment 4 of this invention. It is a perspective view (main part enlarged view) which shows the unit heat exchange unit of the heat exchanger which concerns on Embodiment 5 of this invention. It is a perspective view which shows the heat-transfer member of the heat exchanger which concerns on Embodiment 6 of this invention. It is a perspective view which shows the heat-transfer member of the heat exchanger which concerns on Embodiment 7 of this invention. It is a perspective view which shows the heat-transfer member of the heat exchanger which concerns on Embodiment 8 of this invention. It is a perspective view which shows the heat exchanger which concerns on Embodiment 9 of this invention. It is explanatory drawing which shows the manufacturing method of the heat exchanger which concerns on Embodiment 10 of this invention. It is a refrigerant circuit figure which shows an example of the refrigerating-cycle apparatus which concerns on Embodiment 11 of this invention.

Embodiment 1 FIG.
FIG. 1 is a perspective view showing a unit heat exchange unit of the heat exchanger according to Embodiment 1 of the present invention.
The heat exchanger 100 according to Embodiment 1 is formed by stacking a plurality of unit heat exchange units A shown in FIG. 1 (details of the heat exchanger 100 will be described later with reference to FIG. 2). ). In the following, each configuration of the heat exchanger 100 will be described according to the direction shown in FIG. 1, but this direction does not limit the installation direction of the heat exchanger 100. Moreover, in FIG. 1, in order to illustrate the structure of the heat-transfer member 1, some heat-transfer tubes 2 are cut and described.

The unit heat exchange unit A includes a heat transfer member 1 through which the first refrigerant flows and a heat transfer tube 2 through which the second refrigerant flows. The heat transfer member 1 has, for example, a substantially rectangular shape, and a plurality of refrigerant flow paths 3 are formed through it. A plurality of first fitting grooves 4 a for fitting the heat transfer tubes 2 are formed on the upper surface portion of the heat transfer member 1 along the refrigerant flow path 3, for example. A plurality of second fitting grooves 4 b for fitting the heat transfer tubes 2 are formed on the lower surface portion of the heat transfer member 1 along the refrigerant flow path 3, for example. Here, the refrigerant flow path 3 corresponds to the through hole in the present invention. The upper surface portion of the heat transfer member 1 corresponds to the first surface portion in the present invention, and the lower surface portion of the heat transfer member 1 corresponds to the second surface portion in the present invention. In addition, although the refrigerant | coolant flow path 3 is arrange | positioned in a line along the left-right direction, arrangement | positioning of a refrigerant | coolant flow path is not limited to this. For example, you may form the refrigerant | coolant flow path 3 arrange | positioned along the left-right direction in multiple steps in the up-down direction. Further, for example, the refrigerant flow paths 3 may be arranged in a staggered manner. Further, the cross-sectional shape of the refrigerant flow path 3 is not limited to a substantially circular shape, but is arbitrary.

The heat transfer tube 2 has a substantially circular cross section, and is fitted into the first fitting groove 4 a and the second fitting groove 4 b of the heat transfer member 1. The inner peripheral surface shape of the first fitting groove 4a and the second fitting groove 4b corresponds to the outer peripheral surface shape of the heat transfer tube 2, and the heat transfer tube 2 is connected to the first fitting groove 4a and the second fitting groove. When fitted in the joint groove 4b, the outer peripheral surface of the heat transfer tube 2 and the inner peripheral surfaces of the first fitting groove 4a and the second fitting groove 4b are in close contact with each other. In addition, in FIG. 1, the state which fitted the heat exchanger tube 2 to the 1st fitting groove 4a of the heat-transfer member 1 is shown.

In the first embodiment, the first refrigerant flowing through the refrigerant flow path 3 of the heat transfer member 1 is a refrigerant used in a refrigeration cycle apparatus such as a heat pump (for example, a chlorofluorocarbon refrigerant, a hydrocarbon refrigerant, carbon dioxide, etc. Natural refrigerant). For this reason, in this Embodiment 1, the heat-transfer member 1 is formed using the aluminum and aluminum alloy which have corrosion resistance with respect to the said refrigerant | coolant. When the heat transfer member 1 is formed using aluminum or an aluminum alloy, the heat transfer member 1 can be processed (formed) at low cost by extrusion molding.
Moreover, in this Embodiment 1, water etc. are assumed as a 2nd refrigerant | coolant which flows through the heat exchanger tube 2. FIG. For this reason, in this Embodiment 1, the heat exchanger tube 2 is formed using the copper and copper alloy which have corrosion resistance with respect to the said refrigerant | coolant.

Thus, in the heat exchanger 100 according to the first embodiment, the materials of the heat transfer member 1 and the heat transfer tube 2 can be appropriately selected according to the corrosion characteristics of the first refrigerant and the second refrigerant. it can. Note that the first refrigerant (for example, a natural refrigerant such as a chlorofluorocarbon refrigerant, a hydrocarbon refrigerant, and carbon dioxide) and the second refrigerant (water) are merely examples. Various refrigerants can be selected as the first refrigerant and the second refrigerant according to the refrigeration cycle apparatus in which the heat exchanger 100 is used.

FIG. 2 is a perspective view showing the heat exchanger according to Embodiment 1 of the present invention. In FIG. 2, in order to illustrate the configuration of the heat transfer member 1, a part of the heat transfer tube 2 is cut and described.
As described above, the heat exchanger 100 according to Embodiment 1 can be formed by stacking a plurality of unit heat exchange units A shown in FIG. More specifically, the second heat transfer tube 2 of the unit heat exchange unit A disposed below (the heat transfer tube 2 fitted in the first fitting groove 4a) of the unit heat exchange unit A disposed below is second. It fits in the fitting groove 4b. Thereby, the adjacent unit heat exchange unit A can be connected and the heat exchanger 100 can be formed.

In addition, what is necessary is just to determine suitably the number of lamination | stacking of the unit heat exchange unit A so that the heat exchange amount of a 1st refrigerant | coolant and a 2nd refrigerant may turn into a desired heat exchange amount. Moreover, although the heat exchanger 100 shown in FIG. 2 has shown the example by which the heat exchanger tube 2 was provided in the 1st fitting groove 4a of the unit heat exchange unit A arrange | positioned in the uppermost part, The heat transfer tube 2 may not be provided in the first fitting groove 4a of the arranged unit heat exchange unit A. Moreover, although the heat exchanger 100 shown in FIG. 2 has shown the example in which the heat exchanger tube 2 is not provided in the 2nd fitting groove 4b of the unit heat exchange unit A arrange | positioned at the lowest part, Of course, the heat transfer tube 2 may be provided in the second fitting groove 4b of the unit heat exchange unit A disposed in the unit. Moreover, in this Embodiment 1, although the heat exchanger 100 was formed by laminating | stacking the unit heat exchange unit A by which the heat exchanger tube 2 was fitted to the 1st fitting groove 4a, the 2nd fitting groove | channel was formed. You may form the heat exchanger 100 by laminating | stacking the unit heat exchange unit A by which the heat exchanger tube 2 was fitted by 4b.

As described above, in the heat exchanger 100 configured as described above, the heat transfer tube 2 provided in one unit heat exchange unit A is connected to the fitting groove (first fitting groove 4a or the other unit heat exchange unit A). It can be formed by fitting in the second fitting groove 4b). Thereby, since the outer peripheral surface (heat-transfer surface) of the heat exchanger tube 2 provided between these can be closely adhered and covered by the adjacent heat-transfer member 1, the heat-transfer surface of a heat-transfer tube can be used effectively. Can do. Further, the adjacent heat transfer members 1 are symmetrically arranged on the joint surface 110 (that is, the opposing surfaces of the adjacent heat transfer members 1, see FIG. 2). That is, since the heat transfer members 1 arranged above and below the joining surface 110 have substantially the same temperature, the joining surface 110 does not contribute to heat exchange. For this reason, it is possible to prevent a decrease in heat exchange performance on the joint surface 110, and it is possible to ensure the likelihood of contact accuracy of the joint surface 110 without using a joining means such as brazing. Therefore, the heat exchanger 100 according to Embodiment 1 can improve the heat exchange performance as compared with the conventional one.

Further, the heat exchanger 100 according to the first embodiment is configured such that the heat transfer tube 2 provided in one unit heat exchange unit A is connected to the fitting groove (first fitting groove 4a or the other unit heat exchange unit A). Since it can form by making it fit in the 2nd fitting groove 4b), an assembly process can be performed easily and the processing cost of the heat exchanger 100 can also be suppressed.

Embodiment 2. FIG.
In the unit heat exchange unit A according to the first embodiment, the first fitting groove 4 a and the second fitting groove 4 b of the heat transfer member 1 are formed along the refrigerant flow path 3. However, the unit heat exchange unit A is not limited to the configuration shown in the first embodiment, and may be configured as follows, for example. In the second embodiment, items that are not particularly described are the same as those in the first embodiment, and the same functions and configurations are described using the same reference numerals.

FIG. 3 is a perspective view showing a unit heat exchange unit of the heat exchanger according to Embodiment 2 of the present invention.
In the unit heat exchange unit A (that is, the heat exchanger 100) according to the second embodiment, the first fitting groove 4a formed on the upper surface portion of the heat transfer member 1 is formed substantially orthogonal to the refrigerant flow path 3. Has been. Moreover, the 2nd fitting groove 4b formed in the lower surface part of the heat-transfer member 1 is formed along the 1st fitting groove 4a. That is, the second fitting groove 4 b formed on the lower surface portion of the heat transfer member 1 is also formed substantially orthogonal to the refrigerant flow path 3. Therefore, the unit heat exchange unit A (that is, the heat exchanger 100) according to the second embodiment has a configuration in which the heat transfer tubes 2 and the refrigerant flow paths 3 are arranged substantially orthogonally.

By constructing the unit heat exchange unit A in this way, the flow of the first refrigerant and the flow of the second refrigerant can be made orthogonal. In the case of cross flow, the heat transfer tube 2 can be arranged at the position of the refrigerant flow path 3 according to the state of the first refrigerant. For example, when the second refrigerant is heated by utilizing the condensation change of the first refrigerant, the diameter of the heat transfer tube 2 is reduced and densely arranged at the position of the refrigerant flow path 3 where the first refrigerant is in the subcooled state. By adopting such a configuration, the heat exchange performance of the heat exchanger 100 can be improved. This is particularly effective when a carbon dioxide refrigerant having a temperature gradient in the condensation change is caused to flow through the refrigerant flow path 3. The first fitting groove 4a and the second fitting groove 4b can be formed by cutting or the like after processing (forming) only the coolant channel 3 into the heat transfer member 1 by extrusion molding.

Embodiment 3 FIG.
In the first embodiment, when the heat exchanger 100 is configured, the bonding surfaces 110 of the adjacent heat transfer members 1 (facing surfaces of the adjacent heat transfer members 1) are brought into contact with each other. Not only this but when comprising the heat exchanger 100, you may form a clearance gap in the joint surface 110 of the adjacent heat-transfer member 1. FIG. In Embodiment 3, items that are not particularly described are the same as those in Embodiment 1 or Embodiment 2, and the same functions and configurations are described using the same reference numerals.

FIG. 4 is a perspective view showing a heat exchanger according to Embodiment 3 of the present invention.
In the heat exchanger 100 according to Embodiment 3, when a plurality of unit heat exchange units A shown in FIG. 1 are stacked, a gap 111 is formed on the joint surface 110 of the adjacent heat transfer member 1. Since the joining surface 110 does not contribute to heat exchange, the same effects as those of the first and second embodiments can be obtained even if the heat exchanger 100 is configured in this manner. Further, by forming a gap 111 on the joint surface 110 as in the heat exchanger 100 according to the third embodiment, when the refrigerant leaks from the heat transfer member 1 or the heat transfer tube 2 due to corrosion or the like, the refrigerant is not a gap. Leakage can be easily detected because it flows out through 111.

Embodiment 4 FIG.
The heat exchange performance of the heat exchanger 100 can be further improved by forming the inner peripheral surface of the refrigerant flow path 3 formed in the heat transfer member 1 and the heat transfer tube 2 as follows. In Embodiment 4, items that are not particularly described are the same as those in Embodiments 1 to 3, and the same functions and configurations are described using the same reference numerals.

FIG. 5 is a perspective view (main part enlarged view) showing a unit heat exchange unit of a heat exchanger according to Embodiment 4 of the present invention. In FIG. 5 also, the heat transfer tube 2 is cut and described in order to illustrate the configuration of the heat transfer member 1.
The heat transfer member 1 of the heat exchanger 100 according to the fourth embodiment is formed with a refrigerant flow path 31 having a plurality of grooves formed on the inner peripheral surface. That is, the refrigerant flow path 31 of the fourth embodiment has a groove formed on the inner peripheral surface of the refrigerant flow path 3 shown in the first embodiment (in other words, the inner peripheral surface of the refrigerant flow path 3). Ridges are formed on the top). For example, when the heat transfer member 1 is formed using aluminum or an aluminum alloy, a groove can be processed on the inner peripheral surface of the refrigerant flow path 31 at low cost by extrusion molding. By forming the refrigerant flow path 31 in this manner, the flow of the first refrigerant is disturbed, and the heat transfer performance on the first refrigerant side is improved.

A plurality of grooves are formed on the inner peripheral surface of the heat transfer tube 21 of the heat exchanger 100 according to the fourth embodiment. That is, the heat transfer tube 21 of the fourth embodiment has a groove formed on the inner peripheral surface of the heat transfer tube 2 shown in the first embodiment (in other words, a protrusion on the inner peripheral surface of the heat transfer tube 2. Is formed). By forming the heat transfer tube 21 in this way, the flow of the second refrigerant is disturbed, and the heat transfer performance on the second refrigerant side is improved. In addition, the groove | channel formed in the internal peripheral surface of the heat exchanger tube 21 may be formed straight, for example along a flow path, for example, may be formed helically.

As described above, in the heat exchanger 100 using the unit heat exchange unit A configured as described above, since the grooves are formed in the inner peripheral surfaces of the refrigerant flow path 31 and the heat transfer tube 21, the heat of the heat exchanger 100 is obtained. The exchange performance can be further improved.

In the fourth embodiment, the grooves are formed on the inner peripheral surfaces of both the refrigerant flow path 31 and the heat transfer tube 21, but the heat of the heat exchanger 100 can be obtained only by forming the grooves on one of the inner peripheral surfaces. Exchange performance can be improved.

Embodiment 5. FIG.
Moreover, the heat exchange performance of the heat exchanger 100 can be further improved by forming the heat transfer tube 21 shown in the fourth embodiment as follows. In Embodiment 5, items that are not particularly described are the same as those in Embodiments 1 to 4, and the same functions and configurations are described using the same reference numerals.

FIG. 6 is a perspective view (major part enlarged view) showing a unit heat exchange unit of a heat exchanger according to Embodiment 5 of the present invention. In FIG. 6, the heat transfer tube 2 is cut and illustrated in order to illustrate the configuration of the heat transfer member 1.
The heat exchanger 100 according to the fifth embodiment is different from the heat exchanger 100 shown in the fourth embodiment in the shape of the heat transfer tube. More specifically, the heat transfer tube 22 according to the fifth embodiment has a flat tube shape, and a groove is formed on the inner peripheral surface. Further, the first fitting groove 42a and the second fitting groove 42b (corresponding to the first fitting groove 4a and the second fitting groove 4b in the fourth embodiment) formed in the heat transfer member 1 The inner peripheral surface shape is a shape corresponding to the outer peripheral surface shape of the heat transfer tube 22. That is, the inner peripheral shape of the first fitting groove 42a and the second fitting groove 42b is determined when the heat transfer tube 22 is fitted into the first fitting groove 42a and the second fitting groove 42b. The outer peripheral surface of the heat tube 22 and the inner peripheral surfaces of the first fitting groove 42a and the second fitting groove 42b are in close contact with each other.

In the fifth embodiment, for example, the unit heat exchange unit A is formed as follows. That is, the heat transfer tube (the heat transfer tube 21 shown in the fourth embodiment) having a substantially circular cross section is disposed in the first fitting groove 42 a formed in the heat transfer member 1. Then, the heat transfer member 1 and the heat transfer tube having a substantially circular cross section are pressed, for example. As a result, the heat transfer tube having a substantially circular cross section becomes a flat heat transfer tube 22 and is fitted into the first fitting groove 42a. Of course, the heat transfer tube 22 having a flat shape from the beginning may be prepared and fitted into the first fitting groove 42a.

As described above, in the heat exchanger 100 using the unit heat exchange unit A configured as described above, by using the flat heat transfer tube 22, the representative length of the heat transfer tube 22 is shown in the fourth embodiment. Since it can be made smaller than the heat pipe 21, the heat transfer performance can be further improved as compared with the heat exchanger 100 according to the fourth embodiment.

In the fifth embodiment, the flat heat transfer tube 22 having a groove formed on the inner peripheral surface is used. However, a flat heat transfer tube having no groove formed on the inner peripheral surface may be used. By using such a heat transfer tube, the heat transfer performance can be further improved as compared with the heat exchanger 100 according to the first embodiment.

Embodiment 6 FIG.
The following connection pipes may be provided in the heat exchanger shown in the first to fifth embodiments. In addition, below, the example which provided the said connection piping in the heat-transfer member 1 shown in Embodiment 1 is demonstrated. In the sixth embodiment, items that are not particularly described are the same as those in the first to fifth embodiments, and the same functions and configurations are described using the same reference numerals.

FIG. 7 is a perspective view showing a heat transfer member of a heat exchanger according to Embodiment 6 of the present invention.
In the vicinity of the front end portion (one end portion) of the heat transfer member 1 according to Embodiment 6, a communication hole 5 having one end opening in the right side surface portion of the heat transfer member 1 is formed. The communication hole 5 communicates with each of the refrigerant flow paths 3 formed in the heat transfer member 1. And the connection piping 6 is connected to the opening part of the communicating hole 5 by brazing etc., for example. Further, each of the refrigerant flow paths 3 is closed by, for example, a substantially cylindrical plug 9 being press-fitted into an end portion on the side where the communication hole 5 (connection pipe 6) is provided. The end of the refrigerant flow path 3 may be closed by brazing the plug 9 to the refrigerant flow path 3 or the like.

In the heat exchanger 100 using the heat transfer member 1 configured in this way, the refrigerant flowing through the plurality of refrigerant flow paths 3 can be flowed in and out from one connection pipe 6, and the structure of the heat exchanger 100 Can be simplified.

In the sixth embodiment, the end of the refrigerant flow path 3 is closed by the plug 9, but the refrigerant flow path 3 can be closed by various methods. For example, the end of the refrigerant flow path 3 may be closed only with the brazing material.
In addition, in FIG. 7, the structure near the front end (one end) of the heat transfer member 1 is described, but the connection pipe 6 is connected near the rear end (the other end) of the heat transfer member 1. Of course, it may be provided. That is, the refrigerant flow path 3 may be combined into one flow path at both ends of the refrigerant flow path 3. By providing the connection pipes 6 in the vicinity of both ends of the heat transfer member 1, the structure of the heat exchanger 100 can be further simplified.

In the sixth embodiment, the connection pipe 6 is provided by forming the communication hole 5 in the heat transfer member 1, but the connection pipe 6 can be provided by various methods. For example, the connection pipe 6 may be provided at the end (for example, the front end) of the heat transfer member 1. If the through-hole is formed in the side surface of the connection pipe 6 (more specifically, the position corresponding to the end of each refrigerant flow path 3), each refrigerant flow path 3 and the connection pipe 6 can be communicated. For this reason, since the refrigerant | coolant which flows through the several refrigerant | coolant flow path 3 can be flowed in / out from the one connection piping 6, the structure of the heat exchanger 100 can be simplified.

Embodiment 7 FIG.
When the communication hole 5 is formed in the heat transfer member 1 and the connection pipe 6 is provided, for example, the end of the refrigerant flow path 3 may be closed as follows. In addition, below, the example which provided the said connection piping in the heat-transfer member 1 shown in Embodiment 1 is demonstrated. In the seventh embodiment, items that are not particularly described are the same as those in the first to sixth embodiments, and the same functions and configurations are described using the same reference numerals.

FIG. 8 is a perspective view showing a heat transfer member of a heat exchanger according to Embodiment 7 of the present invention.
In the vicinity of the end portion (at least one of the front end portion and the rear end portion) of the heat transfer member 1 according to the seventh embodiment, one end portion is the heat transfer member 1 as in the sixth embodiment. A communication hole 5 is formed in the right side surface portion. The communication hole 5 communicates with each of the refrigerant flow paths 3 formed in the heat transfer member 1. And the connection piping 6 is connected to the opening part of the communicating hole 5 by brazing etc., for example.

Further, the heat transfer member 1 according to the seventh embodiment includes a blocking plate 10 having a shape corresponding to the ends (front end and rear end) of the heat transfer member 1. Then, the end portion of the refrigerant flow path 3 is closed by brazing the shielding plate 10 to the end portion of the heat transfer member 1.

Also in the heat exchanger 100 using the heat transfer member 1 configured as described above, the refrigerant flowing through the plurality of refrigerant flow paths 3 can flow in and out from one connection pipe 6, and the structure of the heat exchanger 100 Can be simplified.

Embodiment 8 FIG.
Further, when the communication pipe 5 is formed in the heat transfer member 1 and the connection pipe 6 is provided, for example, the end of the refrigerant flow path 3 may be closed as follows. In addition, below, the example which provided the said connection piping in the heat-transfer member 1 shown in Embodiment 1 is demonstrated. In the eighth embodiment, items that are not particularly described are the same as those in the first to seventh embodiments, and the same functions and configurations are described using the same reference numerals.

FIG. 9 is a perspective view showing a heat transfer member of a heat exchanger according to Embodiment 8 of the present invention.
In the vicinity of the end portion (at least one of the front end portion and the rear end portion) of the heat transfer member 1 according to the eighth embodiment, one end portion is the same as in the sixth and seventh embodiments. Is formed in the right side surface of the heat transfer member 1. The communication hole 5 communicates with each of the refrigerant flow paths 3 formed in the heat transfer member 1. And the connection piping 6 is connected to the opening part of the communicating hole 5 by brazing etc., for example. Further, the heat transfer member 1 according to the eighth embodiment is configured so that each end portion (at least one of the front end portion and the rear end portion) on which the connection pipe 6 is provided is pinched to each refrigerant. The end of the flow path 3 is closed.

Also in the heat exchanger 100 using the heat transfer member 1 configured as described above, the refrigerant flowing through the plurality of refrigerant flow paths 3 can flow in and out from one connection pipe 6, and the structure of the heat exchanger 100 Can be simplified.
Moreover, since the edge part of each refrigerant flow path 3 can be obstruct | occluded by pinching the edge part of the heat-transfer member 1, it is not necessary to add the member which obstruct | occludes the edge part of each refrigerant | coolant flow path 3, and processing cost is sufficient. Can be suppressed. Of course, further brazing or the like may be performed after the pinch processing.

Embodiment 9 FIG.
By providing a header pipe in the heat exchanger 100, the peripheral piping of the heat exchanger 100 may be simplified. In the following description, the heat exchanger 100 using the heat transfer member 1 shown in the sixth embodiment will be described as an example. In the ninth embodiment, items that are not particularly described are the same as those in the first to eighth embodiments, and the same functions and configurations are described using the same reference numerals.

FIG. 10 is a perspective view showing a heat exchanger according to Embodiment 9 of the present invention. In addition, also in FIG. 10, in order to illustrate the structure of the heat-transfer member 1, the heat-transfer tube 2 is cut and described.
As shown in FIG. 10, the heat exchanger 100 according to the ninth embodiment includes a header pipe 7 and a header pipe 8. The header pipe 7 communicates with each of the connection pipes 6 provided in each unit heat exchange unit A. By providing the header pipe 7, the refrigerant flowing through the plurality of connection pipes 6 can flow in and out from the single header pipe 7, and the peripheral pipes of the heat exchanger 100 can be simplified. For this reason, the arrangement space of the heat exchanger 100 can be reduced. Here, the header pipe 7 corresponds to the first refrigerant header pipe in the present invention.

Further, the header pipe 8 communicates with each of the heat transfer pipes 2 provided in the unit heat exchange unit A. By providing the header pipe 8, the refrigerant flowing through the plurality of heat transfer pipes 2 can flow in and out from the single header pipe 8, and the peripheral piping of the heat exchanger 100 can be simplified. For this reason, the arrangement space of the heat exchanger 100 can be reduced. Here, the header pipe 8 corresponds to the second refrigerant header pipe in the present invention.

In the ninth embodiment, the example in which both the header pipe 7 and the header pipe 8 are provided has been described. However, it is possible to simplify the peripheral piping of the heat exchanger 100 by simply providing either one of the header pipes. The arrangement space of the exchanger 100 can be reduced.

Embodiment 10 FIG.
In Embodiment 1, after unit heat exchange unit A was formed, these unit heat exchange units A were laminated | stacked and the heat exchanger 100 was formed. For example, the heat exchanger 100 may be formed by the following manufacturing method. In the tenth embodiment, items not particularly described are the same as those in the first to ninth embodiments, and the same functions and configurations are described using the same reference numerals.

FIG. 11 is an explanatory diagram showing a method for manufacturing a heat exchanger according to Embodiment 10 of the present invention. In FIG. 11 also, the heat transfer tube 2 is cut and described in order to illustrate the configuration of the heat transfer member 1.
The heat exchanger 100 according to the tenth embodiment is manufactured by the following procedure.

As shown in FIG. 11 (a), the heat transfer member 1 is installed.

Next, as shown in FIG. 11 (b), the heat transfer tube 2 is installed on the first fitting groove 4a of the heat transfer member 1 installed in FIG. 11 (a).

Next, as shown in FIG. 11 (c), the heat transfer member 1 and the heat transfer tube 2 shown in FIG. 11 (b) are laminated. More specifically, the heat transfer member 1 is arranged above the heat transfer tube 2 so that the heat transfer tube 2 shown in FIG. 11B is arranged below the second fitting groove 4b. The heat transfer tube 2 is installed on the first fitting groove 4 a of the heat transfer member 1. This process is repeated to stack a desired number of heat transfer members 1 and heat transfer tubes 2.

Next, as shown in FIG. 11 (d), the heat transfer member 1 and the heat transfer tube 2 stacked in FIG. 11 (c) are pressed (pressed) in the stacking direction of the heat transfer member 1 by pressing. By being pressed, the heat transfer tube 2 is fitted into the first fitting groove 4 a of the heat transfer member 1 disposed at the lower portion of the heat transfer tube 2 and is disposed at the upper portion of the heat transfer tube 2. The heat member 1 is fitted into the second fitting groove 4b. As described above, by using the manufacturing method shown in the tenth embodiment, the heat exchanger 100 can be manufactured in one operation step, so that the processing cost of the heat exchanger 100 can be suppressed.

In the tenth embodiment, the example in which the heat transfer member 1 and the heat transfer tube 2 are stacked in two stages has been described, but it is of course possible to stack the heat transfer member 1 and the heat transfer tube 2 in three or more stages. Further, in the heat exchanger 100 according to the tenth embodiment, the heat transfer tube 2 is provided in the first fitting groove 4a arranged at the uppermost part, but the first fitting arranged at the uppermost part. The heat transfer tube 2 may not be provided in the groove 4a. By doing so, the upper and lower press surfaces are only the heat transfer member 1 and become symmetrical, so that the press jig can be simplified.

Further, when the connection pipe 6 is provided on the heat transfer member 1 as shown in the sixth to eighth embodiments, the heat transfer member 1 provided with the connection pipe 6 in advance is used, as shown in FIGS. You may perform the process of 11 (d). By manufacturing the heat exchanger 100 in this manner, end processing of the heat transfer member 1 (processing of the communication hole 5 or processing of closing the end of the refrigerant flow path 3, etc.), which is a detailed processing, can be performed first. As a result, the heat exchanger 100 can be easily manufactured.

When the header tube 8 is provided as shown in the ninth embodiment, the plurality of heat transfer tubes 2 are connected to the header tube 8 in advance, and the processing shown in FIGS. 11 (b) to 11 (d) is performed using these. You may go. By manufacturing the heat exchanger 100 in this manner, the post-processing is reduced, so that the operation can be facilitated.

Embodiment 11 FIG.
The heat exchanger 100 shown in the first to tenth embodiments can be used, for example, in the following refrigeration cycle apparatus. In the eleventh embodiment, items not particularly described are the same as those in the first to tenth embodiments, and the same functions and configurations are described using the same reference numerals.

FIG. 12 is a refrigerant circuit diagram showing an example of a refrigeration cycle apparatus according to Embodiment 11 of the present invention.
The refrigeration cycle apparatus 200 according to the eleventh embodiment includes a heat source side refrigerant circuit 210 and a use side refrigerant circuit 220. In the heat source side refrigerant circuit 210, the first refrigerant flows. The heat source side refrigerant circuit 210 is configured by sequentially connecting a compressor 201, the refrigerant flow path 3 of the heat exchanger 100, a decompression device 202 such as an expansion valve, and an evaporator 203. The use side refrigerant circuit 220 is a circuit through which a second refrigerant (for example, water) flows, and is connected to the heat transfer tube 2 of the heat exchanger 100 and a use side device (not shown). The usage-side equipment is, for example, a hot water storage tank when the refrigeration cycle apparatus 200 is used in a hot water storage machine. Further, for example, the usage-side equipment is an indoor heat exchanger when the refrigeration cycle apparatus 200 is used for an air conditioner.

When the heat exchanger 100 is used like the refrigeration cycle apparatus 200 shown in FIG. 12, the heat exchanger 100 heats the second refrigerant (for example, water) by the first refrigerant. The heated second refrigerant (for example, water) is supplied to the use side device. For example, when the refrigeration cycle apparatus 200 is used in a hot water storage device, the heated water is stored in a hot water storage tank or the like. Further, for example, when the refrigeration cycle apparatus 200 is used in an air conditioner, the heated water heats indoor air with an indoor heat exchanger and heats the room.

As described above, in the refrigeration cycle apparatus 200 configured as described above, by using the heat exchanger 100 shown in the first to tenth embodiments, a space-saving and high-performance refrigeration cycle apparatus 200 can be obtained. it can.

In the eleventh embodiment, the heat exchanger 100 is used as a radiator (condenser) of the heat source side refrigerant circuit 210, but the heat exchanger 100 may be used as an evaporator of the heat source side refrigerant circuit. In this case, the 2nd refrigerant | coolant cooled with the 1st refrigerant | coolant can be supplied to a utilization side apparatus.

1 heat transfer member, 2 heat transfer tube, 3 refrigerant flow path, 4a first fitting groove, 4b second fitting groove, 5 communication hole, 6 connection pipe, 7 header pipe, 8 header pipe, 9 plug, 10 Blocking plate, 21 heat transfer tube (with groove), 22 heat transfer tube (flat tube), 31 refrigerant flow path (with groove), 42a first fitting groove, 42b second fitting groove, 100 heat exchanger, 110 Joint surface, 111 gap, 200 refrigeration cycle device, 201 compressor, 202 decompression device, 203 evaporator, 210 heat source side refrigerant circuit, 220 utilization side refrigerant circuit.

Claims

In the heat exchanger in which the first refrigerant and the second refrigerant exchange heat,
A plurality of heat transfer members in which a plurality of through-holes serving as flow paths for the first refrigerant are formed;
A plurality of heat transfer tubes serving as flow paths for the second refrigerant;
With
The heat transfer member includes a first surface portion and a second surface portion formed on the opposite side of the first surface portion on the outer periphery thereof,
A fitting groove for fitting the heat transfer tube is formed in the first surface portion and the second surface portion,
The plurality of heat transfer members are stacked such that the first surface portion and the second surface portion face each other,
The adjacent heat transfer members are connected to each other by fitting the heat transfer tubes into the fitting grooves formed in the first surface portion and the second surface portion arranged to face each other. Exchanger.
2. The heat exchanger according to claim 1, wherein a gap is formed between the adjacent heat transfer members between the first surface portion and the second surface portion arranged to face each other.
The heat according to claim 1 or 2, wherein the through-hole serving as the flow path for the first refrigerant and the heat transfer tube serving as the second flow path are disposed substantially orthogonal to each other. Exchanger.
2. A groove is formed on an inner peripheral surface of at least one of the through hole serving as the flow path for the first refrigerant and the heat transfer tube serving as the second flow path. The heat exchanger according to any one of claims 3 to 4.
The heat exchanger according to any one of claims 1 to 4, wherein a cross-sectional shape of the heat transfer tube is a flat shape.
The heat exchanger according to any one of claims 1 to 5, wherein the heat transfer member includes a connection pipe communicating with the plurality of through holes.
In the heat transfer member, one end portion is opened in the outer peripheral portion of the heat transfer member, and a communication hole communicating with the plurality of through holes is formed,
The plurality of through-holes are closed at the end on the side where the communication holes are formed by a blocking plate,
The heat exchanger according to claim 6, wherein the connection pipe is provided at an opening of the communication hole.
In the heat transfer member, one end portion is opened in the outer peripheral portion of the heat transfer member, and a communication hole communicating with the plurality of through holes is formed,
The plurality of through-holes are closed by pinching at the end on the side where the communication holes are formed,
The heat exchanger according to claim 6, wherein the connection pipe is provided at an opening of the communication hole.
The first refrigerant header pipe communicating with the connection pipe provided in each of the plurality of stacked heat transfer members is provided. Heat exchanger.
The second refrigerant header pipe that communicates with each of the heat transfer pipes provided between the adjacent heat transfer members, according to any one of claims 1 to 9. Heat exchanger.
A method of manufacturing a heat exchanger according to any one of claims 1 to 10,
The heat transfer tube is disposed between the plurality of heat transfer members disposed such that the first surface portion and the second surface portion are opposed to each other,
These are pressed in the laminating direction of the heat transfer member, the heat transfer tube is fitted into the fitting groove,
A method of manufacturing a heat exchanger, wherein the heat transfer member is connected.
A refrigeration cycle apparatus comprising the heat exchanger according to any one of claims 1 to 10.