JP3302212B2 - Heat exchanger - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger for exchanging heat between a first heat medium and a second heat medium in a non-contact state.

[0002]

2. Description of the Related Art As a heat exchanger for exchanging heat between two heat media, for example, a refrigerant and water in a non-contact state, there is a double tube type heat exchanger. This double-pipe heat exchanger performs heat exchange between the refrigerant and water by causing water to flow through the inner pipe and flowing the refrigerant between the inner pipe and the outer pipe.

[0003]

The only way to increase the heat transfer area in the above-described double-pipe heat exchanger is to increase the total length of the double-pipe section. Due to the fact that the heat exchanger is generally used, the heat exchanger itself tends to be large and heavy, which causes a problem that the installation place is restricted. The problem of the large size can be somewhat improved by bending the double pipe portion, but on the contrary, there is a problem that the flow resistance increases due to the collapse of the pipe due to the bending, and the performance is reduced.

[0004] The present invention has been made in view of the above problems, and an object of the present invention is to provide a heat exchanger that can easily secure a heat transfer area and can be easily reduced in size.

[0005]

Means for Solving the Problems In order to achieve the above object, an invention according to claim 1 is a heat exchanger for exchanging heat between a first heat medium and a second heat medium in a non-contact state. A pair of parallel header pipes and a plurality of mutually connected tubes connected at both ends to the header pipes, and a pair of pipe internal spaces and a plurality of tube passages constitute a heat path for the first heat medium. An exchange unit, and a pair of cases joined to each other with the heat exchange unit interposed therebetween. In the joined state, a pair of spaces is formed outside the pipe or tube along the space inside the pipe, and a lateral edge of each tube is formed. A passage communicating with the outer space is formed between at least adjacent tubes by abutting the inner surface thereof, and a pair of outer spaces and a plurality of inter-tube passages constitute a flow path for the second heat medium. And and a ring, and characterized in that.

According to a second aspect of the present invention, in the heat exchanger according to the first aspect, a partition wall is provided in at least one of the pipe inner spaces so that the flow path for the first heat medium is meandering.
A partition wall is provided in at least one of the outer spaces so that the flow path for the second heat medium meanders in the same manner.

According to a third aspect of the present invention, in the heat exchanger according to the first or second aspect, the flow direction of the first heat medium in the tube passage is opposite to the flow direction of the second heat medium in the tube passage. As described above, the heat exchange unit is provided with an inlet and an outlet for the first heat medium, and the casing is provided with an inlet and an outlet for the second heat medium.

According to a fourth aspect of the present invention, in the heat exchanger according to any one of the first to third aspects, a spout is provided corresponding to one of the outer spaces constituting the flow path for the second heat medium. The spout is provided with a cap provided with a valve capable of closing the spout under spring bias.

According to a fifth aspect of the present invention, in the heat exchanger according to any one of the first to fourth aspects, a passage for recovering an overflow of the second heat medium is provided at a spout. I have.

According to a sixth aspect of the present invention, in the heat exchanger according to any one of the first to fifth aspects, at least a casing of the heat exchanger components is formed of resin.

[0011]

According to the first aspect of the present invention, the heat exchange unit constituting the flow path of the first heat medium is sandwiched between the pair of cases, so that the pair of spaces along the space inside the pipe outside the pipe or tube of the heat exchange unit. And at least a passage between the adjacent tubes is formed in communication therewith,
The pair of outer spaces and the passages between the tubes constitute a flow path for the second heat medium. Since the passage for the second heat medium is formed in parallel with the tube by using the gap between the adjacent tubes, a sufficient heat transfer area can be secured even if the heat exchanger itself is downsized.

According to the second aspect of the present invention, the flow path of the first heat medium and the flow path of the second heat medium can be meandered in the same manner by the partition wall provided in the space inside the pipe and the partition wall provided in the outside space. A large flow path length can be secured in a small space. Other functions are the same as those of the first aspect.

According to the third aspect of the present invention, the inlet and the outlet are determined such that the flow direction of the first heat medium in the passage in the tube and the flow direction of the second heat medium in the passage between the tubes face each other. Therefore, heat exchange between the first heat medium and the second heat medium can be performed with high efficiency. Other operations are the same as those of the first and second aspects of the present invention.

According to the fourth aspect of the present invention, the supply of the second heat medium can be performed through the spout, and the gas in the flow path of the second heat medium can be automatically vented by opening the valve by gas pressure. it can. Other functions and effects are described in claims 1 to 3.
It is the same as the invention of the above.

According to the fifth aspect of the present invention, the overflow of the second heat medium can be recovered through a passage provided in the spout. Other operations are the same as those of the first to fourth aspects.

According to the sixth aspect of the present invention, the heat exchanger itself can be reduced in weight by forming the casing from a resin. Other functions are the same as those of the first to fifth aspects.

[0017]

【Example】

First Embodiment FIGS. 1 to 9 show a first embodiment of the present invention. FIG. 1 is a perspective view of a heat exchanger, and FIG. 2 is an exploded perspective view of the heat exchanger shown in FIG. FIG. 3 is a partially cutaway side view of the heat exchange unit, FIG. 4A is a sectional view taken along line AA of FIG.
FIG. 4B is a partial sectional view showing a modification of the partition wall structure.
FIG. 5 is a partial perspective view of the tube, and FIG.
6B is a partial sectional view showing a modification of the partition wall structure, FIG. 7 is a sectional view taken along line CC of FIG. 1, and FIG.
FIG. 9 is a cross-sectional view taken along the line DD in FIG. 9, and FIG. 9 is a diagram showing the flow of the first heat medium and the second heat medium.

As shown in FIG. 2, the heat exchanger of this embodiment mainly comprises a heat exchange unit 1 and a casing (a pair of cases 11) surrounding the heat exchange unit. In this heat exchanger, all the components are made of aluminum or an alloy thereof, and the connection points between the components are brazed.

As shown in FIG. 3, the heat exchange unit 1 includes a pair of header pipes 2 parallel to each other and a plurality of parallel pipes (8 in the figure) connected at both ends to the header pipes 2.
Book), an inlet tube 4 and an outlet tube 5.

The header pipe 2 has upper and lower ends of a circular pipe closed by a cover plate 2a, and has holes 2b for tube connection at equal intervals in the vertical direction. Further, an inlet pipe connection hole 2c and an outlet pipe connection hole 2d are provided in the upper and lower positions of one header pipe 2, respectively. Further, a partition wall 6 is provided in one header pipe 2 for vertically dividing a space in the pipe.

As shown in FIG. 4 (a), the partition wall 6 has a hole 2e having a width corresponding to the inside diameter of the pipe at a predetermined position of the header pipe 2, and a tip curvature matching the inside diameter of the pipe in the hole 2e. Is formed by inserting a wall plate P1 having By the way, the above-mentioned partition wall 6 is shown in FIG.
As shown in FIG. 2, a header pipe 2 which is divided into upper and lower portions at a partition wall forming portion is used, and a wall plate P2 having a center thick portion corresponding to the inner diameter of the pipe is interposed between both divided pipe members. Can be formed.

The tube 3 has a flat shape as shown in FIG. 5, and a plurality of (seven in the figure) passages 3 are provided.
a is juxtaposed inside. The tubes 3 are connected by inserting both ends thereof into side holes 2 b of each header pipe 2.

The inlet pipe 4 and the outlet pipe 5 have external thread portions 4a and 5a at one end, respectively. The inlet pipe 4 and the outlet pipe 5 have the other ends inserted and connected to the side holes 2c and 2d of the header pipe 2, respectively.

In the heat exchange unit 1, a space in the pair of header pipes 2 and a passage in the plurality of tubes 3 constitute a first heat medium, for example, a passage for a refrigerant. As shown by the dashed arrow in FIG. 3, the refrigerant flowing into the inlet pipe 4 flows into the upper five tubes 3 from the upper space in one header pipe 2 and flows into the other header pipe 2 through these tubes 3. Flow in. The refrigerant that has flowed into the other header pipe 2 flows into the lower three tubes 3, flows into the lower space in the one header pipe 2 through these tubes 3, and flows out of the outlet pipe 5.

On the other hand, as shown in FIG. 2, the pair of cases 11 constituting the casing has an opening dimension larger than that of the heat exchange unit 1 except for the inlet pipe 4 and the outlet pipe 5, and the heat exchange unit 1 It has a depth dimension capable of accepting about 1/2 in the width direction.

A U-shaped notch 11a having a curvature corresponding to the outer diameter of the base of the inlet pipe 4 and the outlet pipe 5 is provided on the side surface of each case 11 on the side of the inlet pipe 4 and the outlet pipe 5, respectively. Is formed.

In each case 11, two concave portions 11b corresponding to the header pipe 2 and a concave portion 11c corresponding to the tube 3 are continuously formed via an inclined surface 11d. The depth of the two concave portions 11b corresponding to the header pipe 2 is larger than 外 of the outer diameter of the header pipe, and the depth of the concave portion 11c corresponding to the tube 3 is １ ／ of the tube width.
Almost matches.

Further, as shown in FIG. 6 (a), a partition having a pipe holding groove 12a at the center corresponding to a half of the outer diameter of the header pipe is provided in one recess 11b corresponding to the header pipe 2. The wall 12 is provided integrally with or separately from the case 11 corresponding to the position of the partition wall 6. The partition walls 12 on both sides of the case are used to partition the space S1 formed on the outside of the header pipe 2 by abutting the case with the header pipe 2 therebetween by the case connection, and to be inclined from the edge of the recess 11b. It is provided to extend to the boundary between the surface 11d and the concave portion 11c. Incidentally, the partition wall 12 may extend from the edge of the concave portion 11b to a position slightly entering the concave portion 11c, as shown in FIG. 6B.

Further, in one of the cases 11 (on the front side in FIG. 2), a hole 11e for connecting an inlet pipe and a hole 11f for connecting an outlet pipe are respectively formed corresponding to the concave portion 11b having the partition wall 12. The ends of the inlet pipe 13 and the outlet pipe 14 are inserted and connected to the holes 11e and 11d, respectively.

In this embodiment, the fitting is used for the mutual connection of the cases 11, so that the opening size of one case 11 (front side in FIG. 2) is larger than that of the other case 11 (back side in FIG. 2). Is formed large, and when the case is connected, FIG.
Also, a fitting margin as shown in FIG. 7 can be secured.

The pair of cases 11 are notched with each other.
1a so that the bases of the inlet pipe 4 and the outlet pipe 5 enter,
The heat exchange units 1 are fitted to each other so that the header pipes 2 enter the pipe holding grooves 12a of the partition walls 12, and the fitting portions are joined by brazing.

In a state where both cases 11 are connected, FIG.
As shown in FIG. 7A and FIG. 7, an annular space S1 is formed outside of each header pipe 2 by the concave portions 11b and the inclined surfaces 11d of both cases, and the inlet pipe 13 and the outlet pipe 14 are formed.
Communicate with each other is vertically divided by the partition walls 12 of both cases. In addition, the concave portions 11c of both cases abut against the side edges of the tubes 3 in the width direction, so that the tubes 3 are located between adjacent tubes and at the upper and lower positions thereof.
, A passage S2 having a substantially rectangular cross section is formed. Since the space S1 formed outside each header pipe 2 includes the connection end of the tube 3, both ends in the longitudinal direction of the passage S2 formed between the tubes and at the upper and lower positions thereof communicate with the respective outer spaces S1. I do.

The above casing (a pair of cases 11)
Works together with the heat exchange unit 1 to
A second heat medium, for example, a flow path for water is constituted by a pair of spaces S1 formed outside the tube and a plurality of passages S2 formed between the tubes and at upper and lower positions thereof. As shown by solid arrows in FIGS. 7 and 9, the water that has flowed into the inlet pipe 13 flows from the lower space of one of the header pipe surrounding spaces S1 into the lower four inter-tube passages S2, and through these passages S2. It flows into the space S1 around the other header pipe. The water flowing into the other header pipe surrounding space S1 is
Flows into the passages S2 between the tubes, and these passages S2
Flows into the space above the one header pipe surrounding space S1 through the outlet pipe 14.

According to the heat exchanger of this embodiment, since the passage for the second heat medium is formed in parallel with the tube 3 by utilizing the gap between the adjacent tubes 3, the heat exchanger itself can be reduced in size. Thus, a sufficient heat transfer area can be ensured even when the heat exchanger is formed, whereby a heat exchanger that can easily secure the heat transfer area and easily reduce the size can be provided.

Further, since all the constituent parts are made of aluminum, the heat exchanger itself is extremely lightweight, and since the parts can be connected together by brazing, the assembling work can be simplified.

Further, since the partition wall 6 provided in the header pipe 2 and the partition wall 12 provided in the pipe surrounding space S1, the flow paths of the first heat medium and the second heat medium can be meandered in the same manner. The heat exchange performance can be enhanced by securing a large flow path length in a small space, and the flow path form can be easily changed only by increasing the number of tubes 3 and the partition walls 6, 12, and the heat transfer area Can be expanded.

Furthermore, the first in the passage in the tube
The flow direction of the heat medium and the second
Since the respective inlets and outlets are determined so that the flow directions of the heat medium are opposed to each other, the first heat medium and the second heat medium can exchange heat with high efficiency, thereby contributing to performance improvement.

The contact point between the widthwise side edge of each tube 3 and the recess 11c of both cases may be brought into close contact by brazing or the like, but the upper and lower passages need not be completely separated and independent. The same heat exchange action as described above can be obtained.

[Second Embodiment] FIGS. 10 and 11 show a second embodiment of the present invention. FIG. 10 is a perspective view of a heat exchanger, and FIG. 11 is a cross section taken along line EE of FIG. FIG.

The heat exchanger of this embodiment is characterized in that the first heat medium pouring port 21 is provided at a predetermined position of the casing and the pouring port 21 is provided with an opening / closing cap 22. The configuration is different from the embodiment. The other configuration is the same as that of the first embodiment, so the same reference numerals are used and the description is omitted.

The spout 21 is made of aluminum and has a cylindrical shape having flanges 21a and 21b at upper and lower positions as shown in FIG. A U-shaped notch 11g having a curvature corresponding to the outer diameter of the lower end of the spout 21 is provided at a portion of each case 11 facing the upper surface of one header pipe 2. In a state where both cases 11 are fitted, the lower ends thereof are inserted into circular holes formed by both notches 11g and connected by brazing. An overflow pipe 21c for collecting the overflow of the second heat medium is connected to the side surface of the spout 21.
Further, a cutout 21d into which an engagement protrusion 22e of the opening / closing cap 22 described later can be inserted is formed in the upper flange 21a.

The opening / closing cap 22 is a valve 22 which can be moved up and down.
a, a coil spring 22b for urging the same downward, a gasket 22c, and a cap body 22d. An engagement protrusion 22e is provided on the lower surface of the cap body 22d.

When the opening / closing cap 22 is attached to the spout 21, the valve 22 a is inserted into the spout 21 and the valve 2
Inserting the projection 22e into the notch 21d of the spout 21 while pressing the cap body 22d against the urging force of the coil spring 22b while the cap body 2a is pressed against the inner surface step 21e of the spout 21 What is necessary is just to rotate 22d, and if you release your hand after rotating the cap body 22d,
The cap body 22d is raised by the urging force of the coil spring 22b, and the engagement protrusion 22b is moved upward by the upper flange 21a of the spout 21.
Pressed against and fixed. Since the cap 22 has a cap structure that closes the spout 21 by pressing the valve 22 by the urging force of the coil spring 22, the gas in the flow path of the second heat medium can be automatically released by opening the valve by gas pressure.
Further, the overflow of the second heat medium can be recovered through the overflow pipe 21c.

On the other hand, when the opening / closing cap 22 is removed when replenishing the second heat medium or the like, the cap body 22d is rotated against the urging force of the coil spring 22b so that the engaging projection 22e is formed in the notch 21d. At this time, the opening / closing cap 22 may be lifted.

According to the heat exchanger of this embodiment, the spout 21
The second heat medium can be easily supplied by using the
Degassing in the flow path of the heat medium and recovery of the overflow of the second heat medium can be automatically performed, thereby avoiding a failure of the heat exchanger and reducing maintenance for the heat exchanger. Other functions and effects are the same as those of the first embodiment.

[Third Embodiment] FIG. 12 is a perspective view of a heat exchanger according to a third embodiment of the present invention.

The heat exchanger of the present embodiment is characterized in that the heat exchanger itself is made horizontal and the spout 21 is provided between the inlet pipe 13 and the outlet pipe 14 of the second heat medium. The configuration is different from that of the embodiment. The other configuration is the same as that of the second embodiment, so that the same reference numerals are used and the description is omitted.

The heat exchanger of this embodiment is advantageous when a vertical space cannot be secured when installing the heat exchanger. In addition, since the mounting hole for the spout need only be formed in one of the cases 11, the processing can be simplified accordingly. Other functions and effects are the same as those of the second embodiment.

[Fourth Embodiment] FIGS. 13 and 14 show a fourth embodiment of the present invention. FIG. 13 is a perspective view of a heat exchanger, and FIG. F line sectional view, FIG.
(B) is a partial sectional view showing a modification of the partition wall structure.

The heat exchanger of the present embodiment is a heat exchanger
The configuration differs from the first embodiment in that the upper and lower surfaces and a part of the side surface of the header pipe 2 are exposed from the pair of cases 31 constituting the casing. The other configuration is the same as that of the first embodiment, so the same reference numerals are used and the description is omitted.

The height of each case 31 matches the height of the header pipe 2 in the heat exchange unit 1, and the longitudinal dimension of the case 31 is slightly larger than the center-to-center distance of the header pipe 2 in the heat exchange unit 1. An approximately 1/4 circular notch 31a is formed at the upper and lower end portions.

In this embodiment, the first connection is
In this case, the pair of cases 31 are brought into contact with each other with the heat exchange unit 1 interposed therebetween so that the header pipes 2 enter the cutouts 31a. Are joined by brazing the abutting part and the mutually abutting part.

The space S1 is formed outside the header pipe 2 by the concave portion 31b and the inclined surface 31d of both cases, one outer space S1 is vertically divided by the partition wall 32, and the concave portion having a small depth is formed. The passage 31 extending in the same direction as the tube 3 is formed between the adjacent tubes and at the upper and lower positions by the 31c as in the first embodiment. Incidentally, the above-mentioned partition wall 32 is the same as that shown in FIG.
As shown in FIG. 4 (b), the recess 11b extends from the edge of the recess 11b.
It may extend to a position slightly entering c.

The above casing (a pair of cases 31)
As in the first embodiment, the first space is formed by a pair of spaces S1 formed outside the header pipe 2 in cooperation with the heat exchange unit 1 and a plurality of passages S2 formed between the tubes and at the upper and lower positions thereof. The second heat medium flow path is formed.

According to the heat exchanger of the present embodiment, since the upper and lower surfaces and part of the side surfaces of the header pipe 2 are exposed from the case 31, the heat exchanger of the first embodiment in which the header pipe 2 is completely hidden is provided. The outer shape of the case can be reduced in comparison. Other functions and effects are the same as those of the first embodiment.

[Fifth Embodiment] FIG. 15 is a partial sectional view of a heat exchanger according to a fifth embodiment of the present invention.

The heat exchanger of this embodiment is similar to the fourth embodiment in that the upper and lower surfaces and side surfaces of the header pipe 2 of the heat exchange unit 1 are exposed from a pair of cases 41 constituting a casing. The configuration is different from that of the first embodiment. The other configuration is the same as that of the first embodiment, and the description thereof will be omitted by using the same reference numerals.

In each case 41, the curved portions formed at both ends of the heat exchange unit 1 are in contact with the outer surface of the header pipe 2, and the upper and lower ends in the height direction are the uppermost lowermost tube or the outermost position thereof. They abut against each other and are joined by brazing. In this combined state,
Each case 41 has one surface 41a abutting on the side edge of each tube 3 in the width direction, thereby forming a second heat medium passage S2 extending in the same direction as the tube 3 between adjacent tubes. In addition, the concave portion 41b provided at the end of the tube contact surface of each case 41 allows the
A space S1 for the heat medium is formed. Although illustration is omitted,
One space S1 formed outside the tube is vertically divided by a partition wall, and an inlet pipe 43 and an outlet pipe for the second heat medium are provided corresponding to the space S1.

The above casing (a pair of cases 41)
As in the first embodiment, a flow path of the second heat medium is formed by a pair of spaces S1 formed outside the tube and a plurality of passages S2 formed between the tubes in cooperation with the heat exchange unit 1. Is configured.

According to the heat exchanger of this embodiment, since the space S1 for the second heat medium is formed outside the tube 3, the space S1 is formed outside the header pipe 2. In comparison, the width of the heat exchanger can be reduced. Other functions and effects are the same as those of the first embodiment.

[Sixth Embodiment] FIG. 16 is a partial sectional view of a heat exchanger according to a sixth embodiment of the present invention.

The heat exchanger of the present embodiment is characterized in that a pair of casings 51 forming a casing are formed of resin, and that a sealing material 52 and a resilient metal piece 5
The third embodiment differs from the first embodiment in that the third embodiment is used.
The other configuration is the same as that of the first embodiment, so the same reference numerals are used and the description is omitted.

The sealing members 52 are arranged in grooves provided on the opening edges of the respective cases 51.
After that, the outer periphery of the peripheral flange 51a is sandwiched and joined by the resilient metal piece 53.

According to the heat exchanger of this embodiment, the pair of cases 51 constituting the casing is formed of resin, so that further weight reduction and cost reduction of parts can be achieved. Further, if the pair of cases is made transparent or translucent, the flow state of the second heat medium can be checked from the outside. Other functions and effects are the same as those of the first embodiment.

[Application Example of the Product of the Present Invention] FIGS. 17 and 18 show application examples of the product of the present invention, respectively.

FIG. 17 shows an example in which the product of the present invention is used as a condenser of a heat pump type air conditioner for a vehicle. In FIG. 17, reference numeral 61 denotes an electric compressor, and 62 denotes a water-refrigerant heat exchanger according to the present invention. , 63 is its reserve tank, 64
Is a heater core, 65 is an outdoor heat exchanger, 66 is an indoor heat exchanger, 67 and 68 are expansion valves, 69 to 72 are solenoid valves, 73 and
74 is a check valve, 75 is a liquid receiver, 76 is an electromagnetic pump, 77
Is an air conditioning duct, 78 is a blower fan, 79 is an intake switching damper, and 80 is an air mix damper.

During the heating operation, the refrigerant discharged from the compressor 61 flows into the water-refrigerant heat exchanger 62 through the solenoid valve 69 as shown by the broken line arrow in the figure, and is checked by the check valve 73 and the receiver 75.
And flows into the outdoor heat exchanger 65 via the expansion valve 67,
The process returns to the compressor 61 via the solenoid valve 71. In the water-refrigerant heat exchanger 62, heat exchange is performed between the refrigerant and the water, and the heated water (warm water) is sent to the heater core 64 by the electromagnetic pump 76 as shown by the solid line arrow in FIG. Heating of the vehicle interior is performed using the heat radiation of the heater core 64.

On the other hand, FIG. 18 shows an example in which the product of the present invention is used as an evaporator of a heat pump type air conditioner for a vehicle. In FIG. Exchanger, 83 is its reserve tank,
84 is an indoor condenser, 85 is an outdoor heat exchanger, 86 is an indoor heat exchanger, 87 to 89 are expansion valves, 90 to 93 are solenoid valves, 9
4, 95 is a check valve, 96 is a liquid receiver, 97 is a traction motor which is a heat source, 98 is a water circulation container arranged around the traction motor 97, 99 is an electromagnetic pump, 100 is an air conditioning duct, 101 is Blower fan, 10
2 is an intake switching damper, 103 is an air mix damper.

During the heating operation, the refrigerant discharged from the compressor 81 flows into the indoor condenser 84 via the solenoid valve 90 as shown by the broken line arrow in the figure, and uses the heat released from the indoor condenser 84 to release the vehicle. Room heating is performed. The refrigerant that has passed through the indoor condenser 84 is diverted through a check valve 94 and a liquid receiver 96, and one of the diverted flows is transmitted through an expansion valve 87 to an outdoor heat exchanger 85.
, And the other branch flows into the water-refrigerant heat exchanger 82 via the expansion valve 88, and returns to the compressor 81 via the solenoid valve 92, respectively. The exhaust heat of the traction motor 97 is transmitted to the water in the water circulation container 98, and the heated water (hot water) is sent to the water-refrigerant heat exchanger 82 by the electromagnetic pump 99 as shown by the solid arrow in the drawing. Heat exchange is performed between the hot water and the refrigerant.

[0070]

As described in detail above, according to the first aspect of the present invention, the passage for the second heat medium is formed in parallel with the adjacent tubes by utilizing the gap between the adjacent tubes. Even if the exchanger itself is downsized, a sufficient heat transfer area can be ensured, thereby providing a heat exchanger that can easily secure the heat transfer area and easily downsize.

According to the invention of claim 2, the flow path of the first heat medium and the flow path of the second heat medium can be meandered in the same manner by the partition wall provided in the space inside the pipe and the partition wall provided in the outside space. Therefore, the heat exchange performance can be improved by securing a large flow path length in a small space, and the flow path configuration can be easily changed by simply increasing the number of tubes and each partition wall, and the heat transfer area is increased. it can. Other effects are the same as those of the first aspect.

According to the third aspect of the present invention, the inlet and the outlet are determined such that the flow direction of the first heat medium in the passage in the tube and the flow direction of the second heat medium in the passage between the tubes face each other. Therefore, the first heat medium and the second heat medium can exchange heat with high efficiency, thereby contributing to performance improvement. Other effects are the same as those of the first and second aspects of the invention.

According to the fourth aspect of the invention, the supply of the second heat medium can be easily performed using the spout, and the gas in the flow path of the second heat medium is automatically vented, so that the failure of the heat exchanger occurs. Can be avoided. Other effects are the same as those of the first to third aspects.

According to the fifth aspect of the present invention, the amount of the overflow of the second heat medium is automatically recovered, and the maintenance of the heat exchanger can be reduced. Other effects are the same as those of the first to fourth aspects.

According to the sixth aspect of the present invention, it is possible to reduce the weight of the heat exchanger and the cost of parts. Other effects are the same as those of the first to fifth aspects.

[Brief description of the drawings]

FIG. 1 is a perspective view of a heat exchanger according to a first embodiment of the present invention.

FIG. 2 is an exploded perspective view of the heat exchanger shown in FIG.

FIG. 3 is a partially cutaway side view of the heat exchange unit.

4 is a sectional view taken along line AA of FIG. 3 and a partial sectional view showing a modification of the partition wall structure.

FIG. 5 is a partial perspective view of a tube.

6 is a sectional view taken along line BB of FIG. 1 and a partial sectional view showing a modification of the partition wall structure.

FIG. 7 is a sectional view taken along line CC of FIG. 1;

8 is a sectional view taken along line DD of FIG. 7;

FIG. 9 is a diagram showing flows of a first heat medium and a second heat medium.

FIG. 10 is a perspective view of a heat exchanger according to a second embodiment of the present invention.

FIG. 11 is a sectional view taken along line EE of FIG. 10;

FIG. 12 is a perspective view of a heat exchanger according to a third embodiment of the present invention.

FIG. 13 is a perspective view of a heat exchanger according to a fourth embodiment of the present invention.

14 is a sectional view taken along line FF of FIG. 13 and a partial sectional view showing a modification of the partition wall structure.

FIG. 15 is a partial cross-sectional view of a heat exchanger according to a fifth embodiment of the present invention.

FIG. 16 is a partial cross-sectional view of a heat exchanger according to a sixth embodiment of the present invention.

FIG. 17 is an air conditioning circuit diagram showing an application example of the product of the present invention.

FIG. 18 is an air conditioning circuit diagram showing an application example of the product of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Heat exchange unit, 2 ... Header pipe, 3 ... Tube, 4 ... Inlet pipe, 5 ... Outlet pipe, 6 ... Partition wall, 11 ... Case, 12 ... Partition wall, 13 ... Inlet pipe, 14 ... Outlet pipe,
S1: pipe surrounding space, S2: passage between tubes, 21 ...
Spout, 21c overflow tube, 22 opening / closing cap, 22a valve, 22b coil spring, 31 case,
41: Case, 51: Case.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-57-148196 (JP, A) JP-A-4-68298 (JP, A) JP-A-64-67592 (JP, A) JP-A-2- 306095 (JP, A) JP-A-50-20106 (JP, A) JP-A-4-208391 (JP, A) JP-A-6-14783 (JP, U) JP-A-63-154967 (JP, U) Japanese Utility Model Showa 59-3171 (JP, U) Japanese Patent Publication No. 45-27956 (JP, B1) Japanese Utility Model Showa 37-4274 (JP, Y1) (58) Fields investigated (Int. Cl. ⁷ , DB name) F28D 1/06 F28F 9/00 331 F28F 9/02 301 F28D 1/06 F28D 7/00

Claims (6)

(57) [Claims] 1. A heat exchanger for exchanging heat between a first heat medium and a second heat medium in a non-contact state, comprising: a pair of header pipes parallel to each other; and a pair of ends connected to the header pipes. Consists of multiple parallel tubes,
A heat exchange unit that constitutes a flow path for the first heat medium by a pair of pipe internal spaces and a plurality of tube passages; and a pair of cases coupled with the heat exchange unit interposed therebetween. A pair of spaces along the pipe inner space are formed outside the tubes, and the inner surface is brought into contact with the width direction side edge of each tube to form a passage communicating with the outer space between at least adjacent tubes. A casing that constitutes a flow path for the second heat medium by the outer space and the plurality of inter-tube passages,
A heat exchanger, characterized in that: 2. A partition wall is provided in at least one of the pipe spaces so that the flow path for the first heat medium is meandering, and at least one of the flow paths for the second heat medium is meandering similarly. The heat exchanger according to claim 1, wherein a partition wall is provided in an outer space of the heat exchanger. 3. An inlet and an outlet for the first heat medium in the heat exchange unit such that the flow direction of the first heat medium in the passage in the tube and the flow direction of the second heat medium in the passage between the tubes are opposed to each other. The heat exchanger according to claim 1, wherein an inlet and an outlet for the second heat medium are provided in the casing. 4. A spout is provided corresponding to one outer space constituting a flow path for the second heat medium, and a cap provided with a valve capable of closing the spout under spring bias is provided in the spout. The heat exchanger according to any one of claims 1 to 3, wherein: 5. The heat exchanger according to claim 1, wherein a passage for collecting an overflow of the second heat medium is provided in the spout. 6. The heat exchanger according to claim 1, wherein at least a casing of the heat exchanger components is formed of resin.