JP2004218983A - Heat exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent heat exchange of a thermal medium between the high-temperature side and the low-temperature side in a heat exchanger in which the thermal medium undergoes sensible heat change flowing through heat transfer tubes 4 connected between a pair of header pipes 2 and 3. <P>SOLUTION: A partition member 10 for parting the inside of the header pipe 2 is composed in double-layer structure including an air layer S in the middle. Heat exchange between the thermal medium on the high-temperature side and the thermal medium on the low-temperature side is thus prohibited. <P>COPYRIGHT: (C)2004,JPO&amp;NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a heat exchanger in which a plurality of heat transfer tubes are connected between a pair of header pipes, and more particularly, to a heat exchanger in which a heat medium flowing therein changes sensible heat during heat exchange.
[0002]
[Prior art]
BACKGROUND ART Conventionally, as a heat exchanger in which a heat medium changes sensible heat, for example, a radiator of a refrigerant circuit that performs a vapor compression refrigeration cycle by using carbon dioxide as a refrigerant and compressing the refrigerant to a supercritical pressure (for example, Patent Document 1) 1) is known. In addition, as this type of heat exchanger, a heat exchanger for indoor heating that heats air by flowing radiator water (hot water) of an engine in an automobile is also known.
[0003]
FIG. 5 is a perspective view conceptually showing the external shape of the heat exchanger 50. The heat exchanger 50 includes a pair of header pipes (a first header pipe 51 and a second header pipe 52), and a plurality of heat transfer tubes 53, 53,. It has. In general, a flat tube is used for each of the heat transfer tubes 53, 53,..., And corrugated fins (heat transfer fins) 54, 54,. It is installed. In the figure, only a part of the corrugated fins 54, 54,... Is shown. The first header pipe 51 is provided with an inlet port 55, and the second header pipe 52 is provided with an outlet port 56.
[0004]
In the heat exchanger 50, the refrigerant flow path between the header pipes 51 and 52 is constituted by three paths P1, P2 and P3. Specifically, the insides of the first header pipe 51 and the second header pipe 52 are divided by partition plates 57 and 58, respectively, and the partition plate 57 of the first header pipe 51 and the partition plate 58 of the second header pipe 52 are separated. Are arranged at non-opposing positions, and the heat transfer tubes 53, 53,... Are divided into three paths P1, P2, P3 with the partition plates 57, 58 as boundaries. An S-shaped refrigerant flow path is formed between the header pipes 51 and 52 from the first path P1, the second header pipe 52, the second path P2, the first header pipe 51, and the third path P3. Have been.
[0005]
In the heat exchanger 50, when the refrigerant is introduced into the first header pipe 51 from the inlet port 55, the refrigerant exchanges heat with the air when flowing in the refrigerant flow path in an S-shape to heat the air. The refrigerant then flows out of the heat exchanger 50 through the outlet port 56 of the second header pipe 52.
[0006]
[Patent Document 1]
JP 2001-221580 A
[0007]
[Problems to be solved by the invention]
By the way, in a refrigeration cycle using a refrigerant in a supercritical state (hereinafter, referred to as a supercritical cycle), a process corresponding to a condensation process of a refrigeration cycle using a conventional general refrigerant (R134a or the like) involves a process in which the refrigerant condenses. It becomes the process of radiating heat without doing. At this time, the refrigerant changes its sensible heat without changing its phase, and the temperature decreases due to heat radiation. Therefore, the refrigerant has a higher temperature at the inlet side of the heat exchanger 50 and a lower temperature side at the outlet side.
[0008]
Therefore, when the heat exchanger 50 performs the heat radiation process of the supercritical cycle, the temperature of the refrigerant in each of the header pipes 51 and 52 is different on both sides of the partition plates 57 and 58. As a result, the high-temperature side refrigerant and the low-temperature side refrigerant exchange heat via the partition plates 57 and 58, and the temperature of the low-temperature side refrigerant increases. In other words, the refrigerant once cooled by air will be heated again by the high-temperature refrigerant, so that the operation of the refrigeration cycle will not be performed on the defined Mollier diagram, and the operation efficiency will be reduced. .
[0009]
Such heat exchange between the high temperature side and the low temperature side is not limited to a radiator of a refrigeration cycle using carbon dioxide as a refrigerant, but generally causes a problem in a heat exchanger in which a heat medium that changes sensible heat flows. For example, even in a heat exchanger in which radiator water (hot water) of an engine flows, the temperature of hot water may change due to the heat exchange, and as a result, the heating temperature of air may become unstable.
[0010]
The present invention has been made in view of such a problem, and an object thereof is to provide a heat exchanger in which a heat medium flowing in a heat transfer tube connected between a pair of header pipes changes sensible heat. Another object of the present invention is to prevent the heat medium from exchanging heat between the high temperature side and the low temperature side.
[0011]
[Means for Solving the Problems]
According to the present invention, the partition member for partitioning the inside of the header pipe has a structure including an air layer at an intermediate portion to prevent heat exchange between the high-temperature side heat medium and the low-temperature side heat medium.
[0012]
First, the invention according to claim 1 includes a pair of header pipes, and a plurality of heat transfer tubes connected to the two pipes so as to form a heat medium flow path between the two header pipes. A partition member for dividing the inside of the pipe in the length direction is provided in the header pipe, and the heat transfer tube group is divided into a plurality of paths of the heat medium flow path by the partition member. It is premised on a heat exchanger through which a heat medium that changes heat flows. And this heat exchanger is characterized in that the partition member includes an air layer in an intermediate portion.
[0013]
According to the first aspect of the present invention, when the heat medium such as the supercritical refrigerant or hot water flows from the inlet side to the outlet side through the heat medium flow path formed as a plurality of paths, the heat medium flows with the fluid such as air. The sensible heat changes due to heat exchange. Therefore, in the header pipe, the temperature of the heat medium is different on both sides of the partition member.
[0014]
On the other hand, in the present invention, an air space is provided at an intermediate portion of the partition member that divides the inside of the header pipe. Therefore, the heat medium separated by the partition member is prevented from exchanging heat via the partition member. For this reason, it is possible to prevent the temperature of the heat medium from changing due to heat exchange between the heat medium on the high temperature side and the heat medium on the low temperature side.
[0015]
According to a second aspect of the present invention, in the heat exchanger according to the first aspect, the partition member includes a first partition plate and a second partition plate separated by an air layer. An opening is formed between the first partition plate and the second partition plate of the partition member.
[0016]
According to the second aspect of the present invention, since the opening is formed in the header pipe, the heat transfer area existing between the heat medium on both sides of the partition member is reduced. Therefore, heat exchange between the heat medium on both sides of the partition member is less likely to occur, and the temperature change of the heat medium due to the heat exchange hardly occurs.
[0017]
Next, the inventions according to claims 3 to 6 not only prevent the heat exchange between the heat transfer media in the header pipe but also perform the heat exchange between the heat transfer tubes between the heat transfer tubes of adjacent paths. It is not to be done.
[0018]
Specifically, the invention according to claim 3 is the heat exchanger according to claim 1 or 2, wherein heat transfer fins are mounted between the heat transfer tubes in the heat transfer tube group forming each path, and the heat transfer fins are adjacent to each other. A heat insulating member is mounted between the heat transfer tubes of the path.
[0019]
According to the third aspect of the present invention, the heat medium flowing in the heat transfer tube group constituting each path exchanges heat with a fluid such as air via the heat transfer tube itself and the heat transfer fins. On the other hand, since the heat insulating member is interposed between the heat transfer tubes of the adjacent paths, heat exchange between the heat mediums does not occur between the adjacent paths. Therefore, in the present invention, it is possible to reliably prevent the temperature of the heat medium from changing due to heat exchange between the heat medium.
[0020]
According to a fourth aspect of the present invention, in the heat exchanger according to the third aspect, the distance between the heat transfer tubes on which the heat insulating members are mounted is smaller than the distance between the heat transfer tubes on which the heat transfer fins are mounted. It is characterized by being smaller than the distance.
[0021]
According to the fourth aspect of the present invention, only the heat insulating member is provided between the heat transfer tubes of the adjacent paths, and the heat transfer fins for increasing the heat exchange area with the air are not required. The distance between the tubes is smaller than the distance between the tubes on which the heat transfer fins are mounted. By doing so, the heat exchanger can be downsized.
[0022]
According to a fifth aspect of the present invention, in the heat exchanger according to the first or second aspect, a heat transfer fin is mounted between the heat transfer tubes in the heat transfer tube group constituting each path, and the heat transfer fins of adjacent paths are provided. Between the heat transfer tubes, a heat transfer fin is connected to one of the heat transfer tubes, and a heat insulating member is connected to the other heat transfer tube.
[0023]
According to the fifth aspect of the present invention, the heat exchange between the heat mediums is prevented by the heat insulating member between the heat transfer tubes of the adjacent paths, and the heat medium and the air flowing through one heat transfer tube by the heat transfer fins. Heat exchange is performed.
[0024]
According to a sixth aspect of the present invention, in the heat exchanger according to the first or second aspect, a heat transfer fin is mounted between the heat transfer tubes in the heat transfer tube group forming each path, and the heat transfer fins of adjacent paths are provided. Between the heat transfer tubes, a heat transfer fin is connected to the heat transfer tube on the high temperature side, and a heat insulating member is connected to the heat transfer tube on the low temperature side.
[0025]
According to the sixth aspect of the present invention, heat exchange between the heat mediums is prevented by the heat insulating member between the heat transfer tubes of the adjacent paths, and the heat transfer fins and the heat medium flowing through the heat transfer tube on the high temperature side are prevented by the heat transfer fins. Heat exchange with air takes place.
[0026]
Next, the invention according to claims 7 to 10 specifies only a configuration for preventing heat exchange between heat transfer media between heat transfer tubes of adjacent paths.
[0027]
The inventions of claims 7 to 10 are, like the inventions of claims 1 to 6, connected to a pair of header pipes and the two pipes so as to form a heat medium passage between the header pipes. A plurality of heat transfer tubes, and a partition member is provided in at least one of the header pipes to divide the inside of the tube in the length direction, the heat transfer tube group by the partition member to a plurality of paths of the heat medium flow path It is premised on a heat exchanger which is divided and through which a heat medium which changes sensible heat during heat exchange flows.
[0028]
The invention according to claim 7 is that, in the heat transfer tube group constituting each path, heat transfer fins are mounted between the heat transfer tubes, and heat insulating members are mounted between the heat transfer tubes of the adjacent paths. It is characterized by.
[0029]
According to an eighth aspect of the present invention, in the heat exchanger according to the seventh aspect, the distance between the heat transfer tubes provided with the heat insulating members is equal to the distance between the heat transfer tubes provided with the heat transfer fins. It is characterized by being smaller than.
[0030]
According to the ninth aspect of the present invention, the heat transfer fins are mounted between the heat transfer tubes in the heat transfer tube group constituting each path, and the heat transfer tubes between adjacent heat transfer tubes are transferred to one of the heat transfer tubes. The heat fin is characterized in that a heat insulating member is joined to the other heat transfer tube.
[0031]
The invention according to claim 10 is that, in the heat transfer tube group constituting each path, heat transfer fins are mounted between the heat transfer tubes, and between the heat transfer tubes of the adjacent paths, the heat transfer tubes on the high-temperature side are connected. The heat transfer fin is characterized in that a heat insulating member is joined to the heat transfer tube on the low temperature side.
[0032]
According to the seventh to tenth aspects of the invention, similarly to the third to sixth aspects, it is possible to prevent the heat medium from exchanging heat between the heat transfer tubes of the adjacent paths. Therefore, a rise in the temperature of the heat medium on the low temperature side can be prevented.
[0033]
According to an eleventh aspect of the present invention, in the heat exchanger according to any one of the first to tenth aspects, the heat medium that changes the sensible heat is carbon dioxide in a supercritical state.
[0034]
According to the eleventh aspect of the present invention, in a heat exchanger that performs a heat radiation process of the refrigerant in a refrigeration cycle using carbon dioxide in a supercritical state as a refrigerant, the carbon dioxide on the high-temperature side and the carbon dioxide on the low-temperature side exchange heat so that the temperature is reduced. Can be prevented from changing. Therefore, using this heat exchanger makes it possible to stabilize the operation of the refrigeration cycle.
[0035]
Embodiment 1 of the present invention
Hereinafter, Embodiment 1 of the present invention will be described in detail with reference to the drawings. The first embodiment relates to a heat exchanger used as a radiator of a refrigerant circuit for performing a vapor compression refrigeration cycle by using carbon dioxide as a refrigerant and compressing the refrigerant to a supercritical pressure. In this heat exchanger, the refrigerant changes sensible heat by heat exchange with air. More specifically, the refrigerant does not change phase during heat exchange, and its temperature changes (decreases).
[0036]
FIG. 1 is a perspective view conceptually showing the external shape of the heat exchanger 1. As shown, the heat exchanger 1 includes a pair of header pipes 2 and 3 (a first header pipe 2 and a second header pipe 3) and a plurality of heat transfer tubes connected between the header pipes 2 and 3. 4, 4,.... Each of the heat transfer tubes 4, 4, ... is a so-called flat tube, and corrugated fins (heat transfer fins) 5, 5, ... are provided between the adjacent heat transfer tubes 4, 4. The corrugated fins 5, 5,... Are only partially shown in the figure, but are actually provided between the heat transfer tubes 4, 4,.
[0037]
The first header pipe 2 has an inlet port 6 and an outlet port 7. Further, the first header pipe 2 is provided with a partition member 10 for dividing the inside of the first header pipe 2 between the inlet port 6 and the outlet port 7 in the length direction. The heat transfer tubes 4, 4,... Are divided into two adjacent paths (a first path P1 and a second path P2) with the partition member 10 as a boundary. As described above, the “U” -shaped or “U” -shaped refrigerant flow path is formed in the heat exchanger 1.
[0038]
FIG. 2 is a partially enlarged view of the heat exchanger 1 and shows a detailed structure of a portion where the partition member 10 is mounted on the first header pipe 2. The partition member 10 is configured to have a structure separated into two layers, and an air layer S is interposed at an intermediate portion. Specifically, the partition member 10 includes a first partition plate 11 and a second partition plate 12 separated by an air space S.
[0039]
The first header pipe 2 has a first slit 13a into which the first partition plate 11 is inserted and a second slit 13b into which the second partition plate 12 is inserted. A layer of brazing material is formed on the contact surfaces of each of the partition plates 11 and 12 and the first header pipe 2, and the first and second header pipes 2 are heated by inserting the partition plates 11 and 12 into the slits 13a and 13b. One header pipe 2 and each of the partition plates 11 and 12 are brazed.
[0040]
The first header pipe 2 has an opening 14 formed between the first partition plate 11 and the second partition plate 12. As a result, the first header pipe 2 has a reduced cross-sectional area between the partition plates 11 and 12, and a reduced heat transfer area between the refrigerants separated by the partition member 10.
[0041]
In the first embodiment, the refrigerant in a supercritical state flows into the first header pipe 2 from the inlet port 6 and is divided from the first header pipe 2 into the heat transfer tubes 4, 4,. And flows into the second header pipe 3. The refrigerant that has merged in the second header pipe 3 flows toward the second path P2, branches into the heat transfer tubes 4, 4,... Of the second path P2, and flows into the second header pipe 3. Then, the refrigerant that has joined at the second header pipe 3 flows out of the outlet port 7. When the refrigerant flows in the heat exchanger 1 from the inlet port 6 side to the outlet port 7 side, the refrigerant changes sensible heat by heat exchange with air. Therefore, the temperature of the refrigerant is lower on the outlet side than on the inlet side.
[0042]
Therefore, in the first header pipe 2, the temperature of the refrigerant is different between the first path P1 side and the second path P2 side with the partition member 10 interposed therebetween. And the low-temperature side refrigerant exchange heat. On the other hand, in the first embodiment, the partition member 10 that divides the inside of the first header pipe 2 has a two-layer structure, and an air space S is provided at an intermediate portion. For this reason, it is possible to prevent the refrigerant on both sides of the partition member 10 from exchanging heat via the partition member 10 and prevent a change in temperature due to the heat exchange between the refrigerants.
[0043]
Also, in the first embodiment, the first header pipe 2 is formed with an opening 14 located between the first partition plate 11 and the second partition plate 12, thereby forming the first path in the first header pipe 2. The heat transfer area between the P1 side and the second path P2 side is reduced. Therefore, it becomes more difficult for the refrigerants on both sides of the partition member 10 to exchange heat with each other, and the temperature of the refrigerant on the low-temperature side is also hardly increased.
[0044]
As described above, according to the first embodiment, heat exchange between the high-temperature side refrigerant and the low-temperature side refrigerant is less likely to occur in the heat exchanger 1, and the temperature rise of the low-temperature side refrigerant is suppressed. For this reason, the operation of the vapor compression refrigeration cycle using the refrigerant in the supercritical state can be performed on a predetermined Mollier diagram, so that it is possible to realize an operation that achieves the optimum efficiency in design. Become.
[0045]
-Modification of Embodiment 1-
In each of the above-described embodiments, the configuration example in which the partition member 10 is provided only in the first header pipe 2 and the refrigerant flow path has two paths has been described. The road may be configured with three or more paths. Also in this case, by forming each partition member 10 into a two-layer structure with an air layer S interposed therebetween, heat exchange between the high-temperature side refrigerant and the low-temperature side refrigerant can be prevented, and the operation efficiency can be improved. Can be.
[0046]
Embodiment 2 of the present invention
Embodiment 2 of the present invention is an example of a configuration in which heat exchange between refrigerants is unlikely to occur even between the heat transfer tubes 4 and 4 of the adjacent paths P1 and P2.
[0047]
As shown in FIG. 3, the heat exchanger 1 according to the second embodiment is obtained by providing the heat exchanger 1 according to the first embodiment with a heat insulating member 15. In the second embodiment, a heat transfer fin 5 (only a part of which is shown) is mounted between the heat transfer tubes 4 and 4 with respect to the heat transfer tube group constituting each of the paths P1 and P2. On the other hand, the heat transfer fins 5 are not provided between the heat transfer tubes 4 and 4 of the adjacent paths, and a heat insulating member 15 is mounted instead.
[0048]
The distance between the heat transfer tubes 4, 4,... Is larger than the distance L1 between the heat transfer tubes 4, 4,. The distance L2 between the tubes 4, 4 is smaller. For this reason, comparing the width of the heat transfer fins 5 and the width of the heat insulating member 15, the width of the heat insulating member 15 is determined to be smaller.
[0049]
The heat exchanger 1 has the same configuration as that of the first embodiment, including the partition member 10 and the opening 14 provided in the first header pipe 2.
[0050]
In the heat exchanger 1 according to the second embodiment, the refrigerant flowing through the heat transfer tube group forming each of the paths P1 and P2 flows through the heat transfer tubes 4, 4,. Exchange heat with air. On the other hand, since the heat insulating member 15 is attached between the heat transfer tubes 4 and 4 of the adjacent paths P1 and P2, heat exchange between the refrigerants in this portion is not performed. Therefore, in the process of cooling the refrigerant from the inlet port 6 side to the outlet port 7 side of the heat exchanger 1, the problem that the temperature of the low-temperature refrigerant rises due to heat exchange between the refrigerants is more reliably prevented. it can. Thereby, the temperature of the refrigerant is further stabilized as compared with the heat exchanger 1 of the first embodiment, so that it is possible to more reliably prevent a decrease in operating efficiency.
[0051]
Also, the distance L2 between the heat transfer tubes 4, 4, on which the heat insulating member 15 is mounted, is set to the distance between the tubes 4, 4, ..., on which the heat transfer fins 5, 5, ... are mounted. Since it is narrower than L1, the heat exchanger 1 can be reduced in size. That is, only the heat insulating member 15 is provided without providing the heat transfer fin 5 between the heat transfer tubes 4 and 4 of the adjacent paths P1 and P2, and the heat transfer fins 5, 5,. Since it is not necessary to increase the heat area, the heat exchanger 1 can be downsized by making the width of the heat insulating member 15 smaller than that of the heat transfer fins 5.
[0052]
Conversely, if the heat exchanger 1 is designed to maintain the size, the number of heat transfer tubes 4, 4,... And the number of heat transfer fins 5, 5,. Yes, and it can also improve heat exchange performance. In particular, when the heat insulating member 15 is provided at a plurality of locations with three or more refrigerant flow paths, the effect of reducing the width of each of the heat insulating members 15 can be obtained. The effect of miniaturization and high performance can be enhanced.
[0053]
Third Embodiment of the Invention
Embodiment 3 of the present invention is an example in which a heat insulating member 15 is provided between the heat transfer tubes 4 and 4 of the adjacent paths P1 and P2, and a heat transfer fin 5 is also provided.
[0054]
Specifically, as shown in FIG. 4, in the heat exchanger 1, with respect to the heat transfer tube group constituting each of the paths P1, P2, the heat transfer between the heat transfer tubes 4, 4,. Fins 5 are mounted. Further, between the heat transfer tubes 4 and 4 of the adjacent paths P1 and P2, a heat transfer fin 5 is mounted on one heat transfer tube 4 side and a heat insulating member 15 is mounted on the other heat transfer tube 4 side. More specifically, between the heat transfer tubes 4 and 4 of the adjacent paths P1 and P2, the heat transfer fins 5 are connected to the heat transfer tubes 4 on the first path P1 side on the high temperature side and the second path on the low temperature side. A heat insulating member 15 is mounted on the heat transfer tube 4 on the P2 side.
[0055]
The other configurations are the same as those of the first and second embodiments, and the description is omitted here.
[0056]
In the heat exchanger 1 according to the third embodiment, heat exchange between the refrigerants is prevented by the heat insulating member 15 between the heat transfer tubes 4 and 4 of the adjacent paths P1 and P2, while the heat transfer fins 5 allow the heat transfer fins 5 to communicate with the air. Heat exchange with the refrigerant is also performed. Specifically, heat exchange between the refrigerant flowing through the high-temperature side heat transfer tube 4 and air is performed via the heat transfer fins 5.
[0057]
Therefore, according to the third embodiment, the heat exchange performance between the refrigerant and the air can be improved while preventing a change in the temperature of the refrigerant due to the heat exchange between the refrigerants between the paths P1 and P2. Therefore, the performance of the heat exchanger 1 can be improved. In particular, by mounting the heat transfer fins 5 between the adjacent paths P1 and P2 to the heat transfer tube 4 on the high temperature side, the high temperature side refrigerant having a large temperature difference with the air exchanges heat with the air, thereby further improving the performance. Enhanced.
[0058]
Other Embodiments of the Invention
The present invention may be configured as follows in the above embodiment.
[0059]
For example, in the first embodiment, an example in which two separate partition plates 11 and 12 are used as the partition member 10 has been described. However, the partition member 10 is configured such that the first partition plate 11 and the second partition plate 12 are partially formed. It may be an integral part connected by a. Such an integral partitioning member 10 can be formed by bending a plate material or by machining. In this case, the shape of the slits 13a and 13b of the header pipe 2 may be appropriately changed so that the partition member 10 can be attached to the first header pipe 2.
[0060]
Further, in the second and third embodiments, the partition member 10 provided in the header pipes 2 and 3 can be a single plate-like member that does not include an air layer as in the related art. By suppressing the heat conduction between the heat transfer tubes 4 and 4 between the paths P1 and P2 by the heat insulating member 15, it is possible to suppress a rise in the temperature of the refrigerant on the outlet side.
[0061]
Further, each of the above embodiments is an example in which the present invention is applied to a radiator of a refrigerant circuit that performs a refrigeration cycle by compressing carbon dioxide to a supercritical pressure. However, in the present invention, the radiator water (hot water) of the engine is used. The present invention can be applied to any heat exchanger 1 such as a flowing heat exchanger through which a heat medium that changes sensible heat flows. By doing so, the temperature change of the heat medium such as hot water can be suppressed, and the heating temperature of the air can be stabilized.
[0062]
【The invention's effect】
As described above, according to the first aspect of the invention, the partition member that divides the inside of the header pipe is configured to include the air layer, so that the heat medium on both sides of the partition member does not easily exchange heat. By doing so, it is possible to suppress a rise in the temperature of the low-temperature side heat medium. Therefore, the operation of the vapor compression refrigeration cycle using the refrigerant in the supercritical state can be performed on a predetermined Mollier diagram, and the optimal operation efficiency in design can be realized.
[0063]
According to the second aspect of the present invention, the opening is formed in the header pipe, and the opening is located between the first partition and the second partition of the partition member. , Heat exchange between the heat medium on both sides of the heat exchanger becomes more difficult to occur. Therefore, it is possible to more reliably suppress the temperature rise on the low temperature side.
[0064]
According to the third aspect of the present invention, a heat transfer fin is mounted between the heat transfer tubes in the heat transfer tube group constituting each path, and a heat insulating member is provided between the heat transfer tubes of the adjacent paths. , Heat exchange between the heat transfer media between the heat transfer tubes of adjacent paths can be prevented. Therefore, it is possible to prevent the temperature of the heat medium from changing due to heat exchange between the heat mediums.
[0065]
According to the invention described in claim 4, the distance between the tubes of the heat transfer tube to which the heat insulating member is mounted is made smaller than the distance between the tubes of the heat transfer tube to which the heat transfer fins are mounted. The heat exchanger can be downsized. Further, the number of heat transfer fins and heat transfer tubes can be increased while maintaining the size of the heat exchanger.
[0066]
According to the fifth aspect of the present invention, between the heat transfer tubes of the adjacent paths, the heat transfer fin is mounted on one heat transfer tube side and the heat insulating member is mounted on the other heat transfer tube side. In addition, heat exchange between the air and the heat medium can be performed by the heat transfer fins while preventing heat exchange between the heat medium by the heat insulating member. Therefore, even when the heat insulating member is provided, it is possible to prevent the heat exchange efficiency from decreasing.
[0067]
According to the invention described in claim 6, since the heat transfer fins are attached to the heat transfer tubes on the high temperature side and the heat insulating members are attached to the heat transfer tubes on the low temperature side, between the heat transfer tubes of the adjacent paths. The heat transfer fins allow the heat exchange between the heat medium flowing through the high-temperature side heat transfer tube and the air while the heat exchange between the heat mediums is prevented by the heat insulating member. Therefore, even when the heat insulating member is provided, it is possible to more reliably prevent the heat exchange efficiency from lowering.
[0068]
Also in the inventions according to claims 7 to 10, heat exchange between the heat transfer media between the heat transfer tubes of adjacent paths can be prevented, and the inventions according to claims 3 to 6 respectively. The same effect as described above can be obtained.
[0069]
According to the eleventh aspect of the present invention, in a radiator of a refrigerant circuit using carbon dioxide in a supercritical state as a refrigerant, heat exchange between a high-temperature side refrigerant and a low-temperature side refrigerant can be prevented, and the refrigeration cycle can be stabilized. Operation can be made possible.
[Brief description of the drawings]
FIG. 1 is a perspective view conceptually showing the external shape of a heat exchanger according to Embodiment 1 of the present invention.
FIG. 2 is a partially enlarged view of the heat exchanger of FIG.
FIG. 3 is a perspective view conceptually showing an external shape of a heat exchanger according to a second embodiment.
FIG. 4 is a perspective view conceptually showing an external shape of a heat exchanger according to a third embodiment.
FIG. 5 is a perspective view conceptually showing the appearance of a conventional heat exchanger.
[Explanation of symbols]
1 heat exchanger
2 First header pipe
3 Second header pipe
4 Heat transfer tube
5 Corrugated fins (heat transfer fins)
6 entrance port
7 Exit port
10 Partition member
11 1st divider
12 Second divider
13a 1st slit
13b 2nd slit
14 opening
15 Thermal insulation material
P1 First pass
P2 2nd pass
S air layer

Claims (11)

A pair of header pipes, comprising a plurality of heat transfer tubes connected to both pipes so as to form a heat medium flow path between both header pipes,
A partition member for dividing the inside of the pipe in the length direction is provided in at least one header pipe, and the heat transfer tube group is divided into a plurality of paths of the heat medium flow path by the partition member,
A heat exchanger through which a heat medium that changes sensible heat flows during heat exchange,
A heat exchanger, wherein the partition member includes an air layer in an intermediate portion. The heat exchanger according to claim 1,
The partition member is composed of a first partition plate and a second partition plate separated by an air layer,
A heat exchanger, wherein an opening is formed between the first partition plate and the second partition plate in the header pipe. The heat exchanger according to claim 1 or 2,
Heat transfer fins are installed between the heat transfer tubes in the heat transfer tube group constituting each path,
A heat exchanger, wherein a heat insulating member is mounted between heat transfer tubes of adjacent paths. The heat exchanger according to claim 3,
A heat exchanger wherein the distance between the heat transfer tubes to which the heat insulating members are attached is smaller than the distance between the heat transfer tubes to which the heat transfer fins are attached. The heat exchanger according to claim 1 or 2,
Heat transfer fins are installed between the heat transfer tubes in the heat transfer tube group constituting each path,
A heat exchanger characterized in that heat transfer fins are connected to one heat transfer tube and a heat insulating member is connected to the other heat transfer tube between heat transfer tubes in adjacent paths. The heat exchanger according to claim 1 or 2,
Heat transfer fins are installed between the heat transfer tubes in the heat transfer tube group constituting each path,
A heat exchanger characterized in that heat transfer fins are connected to heat transfer tubes on the high-temperature side and heat insulating members are connected to heat transfer tubes on the low-temperature side between heat transfer tubes of adjacent paths. A pair of header pipes, comprising a plurality of heat transfer tubes connected to both pipes so as to form a heat medium flow path between both header pipes,
A partition member for dividing the inside of the pipe in the length direction is provided in at least one header pipe, and the heat transfer tube group is divided into a plurality of paths of the heat medium flow path by the partition member,
A heat exchanger through which a heat medium that changes sensible heat flows during heat exchange,
Heat transfer fins are installed between the heat transfer tubes in the heat transfer tube group constituting each path,
A heat exchanger, wherein a heat insulating member is mounted between heat transfer tubes of adjacent paths. The heat exchanger according to claim 7,
A heat exchanger wherein the distance between the heat transfer tubes to which the heat insulating members are attached is smaller than the distance between the heat transfer tubes to which the heat transfer fins are attached. A pair of header pipes, comprising a plurality of heat transfer tubes connected to both pipes so as to form a heat medium flow path between both header pipes,
A partition member for dividing the inside of the pipe in the length direction is provided in at least one header pipe, and the heat transfer tube group is divided into a plurality of paths of the heat medium flow path by the partition member,
A heat exchanger through which a heat medium that changes sensible heat flows during heat exchange,
Heat transfer fins are installed between the heat transfer tubes in the heat transfer tube group constituting each path,
A heat exchanger characterized in that heat transfer fins are connected to one heat transfer tube and a heat insulating member is connected to the other heat transfer tube between heat transfer tubes in adjacent paths. A pair of header pipes, comprising a plurality of heat transfer tubes connected to both pipes so as to form a heat medium flow path between both header pipes,
A partition member for dividing the inside of the pipe in the length direction is provided in at least one header pipe, and the heat transfer tube group is divided into a plurality of paths of the heat medium flow path by the partition member,
A heat exchanger through which a heat medium that changes sensible heat flows during heat exchange,
Heat transfer fins are installed between the heat transfer tubes in the heat transfer tube group constituting each path,
A heat exchanger characterized in that heat transfer fins are connected to heat transfer tubes on the high-temperature side and heat insulating members are connected to heat transfer tubes on the low-temperature side between heat transfer tubes of adjacent paths. The heat exchanger according to any one of claims 1 to 10, wherein the heat medium that changes sensible heat is carbon dioxide in a supercritical state.

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