JP2003336975A - Heat exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compact heat exchanger having excellent pressure- resistance. <P>SOLUTION: This heat exchanger 10 has a plurality of flow passages, namely, first flow passages 1 arranged in parallel with each other on a plane, second flow passages 2 and third flow passages 3 opposite to the plane formed by the first flow passages. In the case of using a fine flow passage having a small cross section for the first flow passage to improve pressure-resistance, a flat and wide heat transmitting surface is formed by arranging a plurality of this fine flow passages on the same plane, and a thin and compact heat exchanger can be structured. Since the second flow passages 2 and the third flow passages 3 are provided in at least one surface of the flat first flow passages 1, heat can be exchanged between the fluid flowing in the first flow passages 1 and the fluid flowing in the second flow passages 2 and the third flow passages 3 can be exchanged separately or simultaneously. A compact heat exchanger having excellent pressure-resistance and easy to be expanded for multiple function is thereby provided. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger, and more particularly, to a heat exchanger for refrigerant and water used for a water heater for generating hot water using a heat pump, an air conditioner for producing cold / hot water, and the like. The present invention relates to a heat exchanger that transfers heat between different media.

[0002]

2. Description of the Related Art Conventionally, as this type of heat exchanger, heat exchangers such as those disclosed in Japanese Utility Model Publication No. 62-5587 and Japanese Patent Application Laid-Open No. 2002-22268 have been proposed. The configuration will be described with reference to FIG.

The heat exchanger 70 is used, for example, in a so-called heat pump water heater that heats water by utilizing heat of condensation of a refrigerant, and a hot water heat exchanger 50 that heats hot water. The bath heat exchanger 60 for heating the bath water is arranged substantially directly above and unitized. The hot water supply heat exchanger 50 has a configuration in which the first refrigerant pipe 51 and the hot water supply water pipe 52 are flattened and brought into close contact with each other, and are spirally wound. By flowing a high-temperature high-pressure refrigerant into the first refrigerant pipe 51 and a low-temperature low-pressure water into the hot water supply water pipe 52, the refrigerant functions as a hot water heat exchanger that heats the water by heat of condensation of the refrigerant or the like. On the other hand, the bath heat exchanger 60 is
Similarly, the second refrigerant pipe 61 and the bath water pipe 62 are flattened and brought into close contact with each other, and spirally wound. A high-temperature high-pressure refrigerant is introduced into the second heat transfer pipe 51, and a low-temperature low-pressure water from the bath is introduced into the bath water pipe 52 to heat the hot water in the bath by the heat of condensation of the refrigerant, etc. It will function as a container.

In the prior art example, the flatness is facilitated by using a tube body having a small wall thickness and a relatively small strength as a heat transfer tube. The heat exchange performance is improved by expanding the heat transfer area.

[0005]

However, the above conventional structure has the following problems. For example, when the heat exchanger 70 is used as a heat exchanger of carbon dioxide refrigerant and water having a very high operating pressure, the first high pressure refrigerant flows through the heat exchanger 70.
Since the pressure applied to the inside of the second refrigerant pipe 51 or the second refrigerant pipe 61 becomes extremely high, the conventional structure in which the pipe body is mechanically flattened in advance is easily deformed and has sufficient pressure resistance. It will be difficult to secure. Further, as shown in FIG. 6, the heat exchanger 70 has a configuration in which a first refrigerant pipe 51 and a hot water supply water pipe 52, and a second refrigerant pipe 61 and a bath water pipe 62 are closely attached to each other and spirally wound. Since a dead space is formed inside the heat exchanger 70 having a cylindrical shape, the volume occupied by the heat exchanger is larger than the heat transfer area, and a large amount of space needs to be stored inside the device. There was a problem.

The present invention solves the above-mentioned conventional problems and provides a compact heat exchanger having excellent pressure resistance.

[0007]

In order to solve the above-mentioned conventional problems, a heat exchanger according to the present invention comprises: a first flow path in which a plurality of flow paths are arranged in parallel on the same plane; It has a second flow path and a third flow path facing at least one surface formed by the first flow path.

As a result, in order to improve the pressure resistance, the first
Even when using a minute flow path having a small cross-sectional area as the flow path of, by forming a plurality of these in parallel closely arranged on the same plane, to form a flat and wide heat transfer surface,
It becomes possible to construct a thin and compact heat exchanger. Further, by providing the second flow path and the third flow path on at least one surface of the flat first flow path, the fluid flowing through the first flow path and the second flow path and the third flow path are provided. Three
It is possible to perform heat exchange with the fluid flowing through the flow passages singly or simultaneously. For example, by using one refrigerant flow path as a heating source, it is possible to combine a plurality of functions such as performing water heating for hot water supply and water heating for reheating the bathtub independently or simultaneously. Therefore, it is possible to provide a compact heat exchanger that has excellent pressure resistance, is easy to deploy multiple functions, and has a small dead space.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The invention according to claim 1 is a first flow path in which a plurality of flow paths are arranged in parallel on the same plane, and at least one surface formed by the first flow path. Also has a second flow path and a third flow path facing each other, and in the case of using a fine flow path having a small cross-sectional area as the first flow path in order to improve the pressure resistance, By arranging a plurality of these in close contact with each other in parallel on the same plane, it is possible to form a flat and wide heat transfer surface and configure a thin and compact heat exchanger. Further, by providing the second flow path and the third flow path on at least one surface of the flat first flow path, the fluid flowing through the first flow path and the second flow path
And heat exchange can be performed with the fluid flowing through the third flow path alone or simultaneously. For example, one refrigerant channel can be used as a heating source to have a plurality of functions such that the heating of water for hot water supply and the heating of water for reheating the bathtub are performed individually or simultaneously. Therefore, it is possible to provide a compact heat exchanger that has excellent pressure resistance, is easy to deploy multiple functions, and has a small dead space.

According to a second aspect of the present invention, there is provided a first flow path formed by arranging a plurality of flow paths in parallel on the same plane, and a first flow path facing one surface formed by the first flow path. The second flow path and the third flow path facing the other surface formed by the first flow path have the third flow path, and the first flow path has the first flow path.
It becomes possible to form a thin heat exchanger by arranging a plurality of the channels in parallel on the same plane to form a wide heat transfer surface.
In addition, with respect to this flat first channel, a second channel is formed on one surface.
By providing the third flow path on the other side, the fluid flowing through the first flow path and the fluid flowing through the second and third flow paths may be used independently or simultaneously. Heat exchange can be performed. Further, since the heat exchanger is configured by using the upper and lower surfaces of the first flow path, it is possible to secure a sufficiently large heat transfer area as compared with the configuration of only one surface. Therefore, it is possible to provide a more compact heat exchanger having excellent pressure resistance and easy multi-functional deployment, excellent heat exchange performance.

The invention according to claim 3 is the same as the first flow path with respect to the configuration according to claim 1 or 2, and particularly for either one of the second flow path and the third flow path. It is made by circulating the above fluid. According to this, for example, a heat exchanger between refrigerants (for example, an internal heat exchanger between a refrigerant at a condenser outlet and a refrigerant at an evaporator outlet) used for improving a refrigerating effect in a heat pump cycle, a refrigerant and a hot water supply. The integration with water and the heat exchanger can be easily realized. Therefore, similarly, it is possible to provide a compact heat exchanger which is easy to be expanded in multiple functions.

According to a fourth aspect of the present invention, in addition to the structure of the first or second aspect, the second flow passage and the third flow passage are communicated with each other and the same fluid is circulated. Yes,
As a single heat exchanger for the fluid flowing through the first flow path and the fluid flowing through the second and third flow paths arranged on both sides thereof,
It is possible to secure a remarkably large heat transfer area and provide a heat exchanger having extremely high heat exchange performance.

According to a fifth aspect of the present invention, in addition to the configurations of the first to fourth aspects, the first flow passage and the second flow passage are formed only on one surface of the first flow passage. The piping part communicating with each of the third and third flow paths is planted, and the centralized piping on one side of the heat exchanger improves the pipe assembling ability in the device, while the rear surface of the heat exchanger is improved. A flat surface can be formed, the degree of freedom of installation in the device is improved, and the dead space is reduced.

According to a sixth aspect of the present invention, in addition to the configurations of the first to fifth aspects, particularly, the high pressure side fluid is provided in the first flow path, and the low pressure is provided in at least one of the second flow path and the third flow path. The side fluid circulates, and the reliability of the heat exchanger is improved by selectively allowing the high-pressure side fluid to flow into the first channel, which is easy to improve the pressure resistance due to the miniaturization of the channel. be able to.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 is a block diagram of a heat exchanger 10 according to Embodiment 1 of the present invention, and FIGS. 2 and 3 are sectional views thereof. In FIG. 1, the heat exchanger 10 is provided with a first flow path 1 formed by arranging a plurality of flow paths in parallel on the same plane, and a position facing one of the planes formed by the first flow path 1. The second flow path 2 and the third flow path 3 are arranged in the above. First
The fluid A flows through the flow passage 1 as indicated by the dotted arrow, while the fluid B flows through the second flow passage 2 as indicated by the alternate long and short dash arrow, and the solid arrow in the third flow passage 3. The fluid C flows as shown in FIG.

As a concrete flow path configuration, the first flow path 1
For example, as shown in FIG. 2, a plurality of channels are formed in parallel on substantially the same plane by metal extrusion processing. On the other hand, the second flow path 2 is formed by a space formed by forming a flow path groove on a metal plate by, for example, drawing by a pressing machine and overlapping the plate serving as a partition wall.
The flow path 3 is also configured in the same manner. The heat exchanger 1
Examples of the material forming each of the 0 flow paths include metals having good thermal conductivity and formability, such as copper, aluminum, and stainless steel. Further, as a method for manufacturing the heat exchanger 10 in which the respective flow paths are integrated in a heat-tight manner, general brazing or joining by diffusion welding can be mentioned.

As shown in FIG. 1, the first flow path 1, the second flow path 2 and the third flow path 3 are located at positions facing each other over substantially the entire length thereof, and Channel 1
The fluid A flowing through and the fluids B and C flowing through the second flow path 2 and the third flow path 3 have a configuration in which they are opposed to each other.

The structure of the inlet / outlet portion of each flow path is as follows.
For example, as shown in FIG. 3, the pipes 31 a and 31 b communicating with the first flow passage 1 and the pipe 32 communicating with the second flow passage 2
a and 32b, and pipes 33a and 33 communicating with the third flow path 3
b are planted respectively. All of these pipes
The upper surface of the first flow path 1, that is, one surface of the heat exchanger 10 is planted.

The operation of the heat exchanger configured as described above will be described below. For example, the heat exchanger 10
However, it is assumed that the heat pump water heater is provided with a heat exchanger for hot water supply that heats hot water using condensation heat of the refrigerant, and a heat exchanger for bathtub that also heats bath water. At this time, the fluid A flowing through the first flow passage 1 is a high-temperature high-pressure refrigerant, the fluid B flowing through the second flow passage 2 is a low-temperature low-pressure hot water supplied from a hot water storage tank, etc., and the fluid flowing through the third flow passage 3. C becomes low temperature low pressure bath water from the bath. While the high-temperature and high-pressure refrigerant flows through the first flow path 1, the low-temperature low-pressure hot water or the third flow path 3 that flows through the second flow path 2 that faces the first flow path 1
The water in the bathtub flowing through the water is heated individually or simultaneously.

Here, according to the present embodiment, even in the case where a fine channel having a small cross-sectional area is used as the first channel 1 in order to improve the pressure resistance, a plurality of such channels are formed on the same plane. By arranging them in close contact in parallel with each other, it is possible to form a flat and wide heat transfer surface and to configure a thin and compact heat exchanger.

Further, by providing the second flow path 2 and the third flow path 3 on one surface of the flat first flow path 1, the fluid flowing through the first flow path 1 Heat exchange can be performed independently or simultaneously with the fluid flowing through the second flow passage 2 and the third flow passage 3. In particular, when the fluid flowing through the first flow path 1 is a coolant, the fluid flowing through the second flow path 2 is hot water, and the fluid flowing through the third flow path 3 is bath water, one refrigerant flow path is selected. By using the same, it is possible to have a plurality of functions such that the water heating for hot water supply and the water heating for reheating the bathtub are performed individually or simultaneously.

Further, in this embodiment, the first flow path 1, the second flow path 2 and the third flow path 3 are communicated with each other only on one surface side of the first flow path 1. Since the piping to be installed is planted, the concentrated piping on one side of the heat exchanger 10 improves the pipe assembling property in the apparatus, while the heat exchanger 1
A flat surface can be formed on the back surface of 0, the degree of freedom of installation in the device is improved, and the dead space is also reduced.

Therefore, it is possible to provide a compact heat exchanger having excellent pressure resistance and easy multi-functional expansion, and a small dead space.

(Embodiment 2) The embodiment 2 of the present invention is the same as that of the embodiment 1, especially for the second flow path 2.
The same fluid as that of the first channel 1 is circulated. For example, in a vapor compression heat pump cycle, an internal heat exchanger that exchanges heat between the refrigerant at the outlet of the condenser and the refrigerant at the outlet of the evaporator may be used in order to enhance the refrigerating effect.

The heat exchanger 10 of this embodiment is used as a condenser of such a heat pump circuit (particularly a gas cooler in the case of a supercritical cycle using a carbon dioxide refrigerant). As the fluid A flowing through the first flow path 1, a high-temperature high-pressure refrigerant discharged from a compressor (not shown) flows, and as the fluid B flowing through the second flow path 2, an evaporator of the same heat pump circuit. Low temperature low pressure refrigerant from (not shown),
As the fluid C flowing through the third flow path 3, it is assumed that low-temperature low-pressure hot water supplied from a hot water storage tank or the like flows.

At this time, the high-temperature high-pressure refrigerant radiates heat to the low-temperature low-pressure hot-water supply flowing in the third flow path 3 facing the first flow path 1 while flowing, and further,
It is cooled by the low-temperature low-pressure refrigerant from the evaporator flowing through the second flow path 2 and is appropriately supercooled to be supplied to the next evaporator. If this evaporator (not shown) is used as a heat exchanger with the atmosphere in the room such as a house or a building, it can be used for cooling the room. By arranging such an internal heat exchanger, the refrigerating effect of the heat pump circuit is generally increased. Therefore, according to the present embodiment, it is possible to provide a compact heat exchanger, which is easy to develop in multiple functions.

(Embodiment 3) FIG. 4 is a structural view of a heat exchanger 20 of Embodiment 3 of the present invention, and FIG. 5 is a sectional view thereof. In FIG. 4, the heat exchanger 20 is provided with a first flow passage 11 in which a plurality of flow passages are arranged in parallel on the same plane, and faces one of the planes formed by the first flow passage 11. Second channel 12
And the third flow path 13 is arranged so as to face the other side of the plane formed by the first flow path 11. First channel 11
While the fluid A flows through the second flow path 12 as indicated by the dotted arrow, the fluid B flows through the second flow path 12 as indicated by the dashed-dotted arrow.
However, as shown by the solid arrow in the third flow path 13, the fluid C
Are distributed respectively.

As a concrete flow path configuration, the first flow path 1
1 is, for example, similar to the first embodiment, in which a plurality of flow paths are formed in parallel on the substantially same plane by metal extrusion processing. On the other hand, the second flow path 12 is formed by a space formed by forming a flow path groove on a metal plate by drawing, for example, by a pressing machine and overlapping with a plate that serves as a partition wall. It is constructed in the same way as. The material forming each flow path of the heat exchanger 20 may be a metal having good thermal conductivity and formability, such as copper, aluminum, or stainless steel. Further, as a method of manufacturing the heat exchanger 20 in which the respective flow paths are integrated in a heat-tight manner, general brazing or diffusion welding may be used.

The first channel 11 and the second channel 12
As shown in FIG. 4, the third flow path 13 and the third flow path 13 are located at positions facing each other over substantially the entire length thereof, and the fluid A flowing through the first flow path 11 and the second flow path 12 and the third flow path 13 are provided. Three
The fluids B and C flowing in the flow path 13 of FIG.

The configuration of the inlet / outlet portion of each flow path is as follows.
For example, as shown in FIG. 5, pipes 41a and 41b communicating with the first flow passage 11, pipes 42a and 42b communicating with the second flow passage 12, and a pipe 43a communicating with the third flow passage 13.
And 43b are planted respectively. All of these pipes are erected only on the upper surface of the first flow path 11, that is, on one surface of the heat exchanger 20.

The operation of the heat exchanger configured as described above will be described below. For example, as in the first embodiment, it is assumed that a high-temperature, high-pressure refrigerant from a heat pump circuit of a vapor compression type flows as the fluid A flowing in the first flow path 11. Further, as the fluid B flowing through the second flow path 12,
Low-temperature low-pressure hot water from a hot water storage tank, the third flow path 13
As the fluid C flowing through, bath water of low temperature and low pressure flows from the bath. At this time, the high-temperature and high-pressure refrigerant flows through the first flow passage 11 while facing the second flow passage 12 facing the first flow passage 11.
The low-temperature and low-pressure hot-water supply water flowing through or the bath water flowing through the third flow path 13 is heated alone or simultaneously.

Here, according to the present embodiment, even in the case where a fine channel having a small cross-sectional area is used as the first channel 11 in order to improve the pressure resistance, a plurality of channels are formed on the same plane. By arranging them in close contact in parallel with each other, it is possible to form a flat and wide heat transfer surface and to configure a thin and compact heat exchanger.

With respect to the flat first flow passage 11, the second flow passage 12 is provided on one surface and the third flow passage is provided on the other surface.
By providing the respective flow paths 13 of the first flow path 1
Fluid flowing through the first flow path 1, the second flow path 12 and the third flow path 1
Heat exchange with the fluid flowing through 3 can be performed alone or simultaneously. In particular, when the fluid flowing through the first flow path 11 is a refrigerant, the fluid flowing through the second flow path 12 is hot water, and the fluid flowing through the third flow path 13 is bath water, one refrigerant flow path is selected. By using the same, it is possible to have a plurality of functions such that the water heating for hot water supply and the water heating for reheating the bathtub are performed individually or simultaneously.

Furthermore, since the heat exchanger 20 is constructed by using the upper and lower surfaces of the first flow path 11, a sufficiently large heat transfer area can be secured as compared with the configuration having only one surface. Also,
When the low temperature side fluid is circulated in the second flow path 12 and the third flow path 13, the temperature difference between the heat exchanger and the atmosphere surrounding the heat exchanger becomes small, and the heat insulating property of the heat exchanger is improved, that is, the heat is radiated. Loss can be reduced and heat exchange performance can be improved.

Further, in this embodiment, the first flow passage 11 and the second flow passage 12 are provided only on one surface side with respect to the first flow passage 11.
Since the pipes communicating with the third flow path 13 and the third flow path 13 are erected, the concentrated piping on one side of the heat exchanger improves the pipe assembling ability in the apparatus, while A flat surface can be formed on the back surface, which improves the degree of freedom of installation in the device and reduces dead space. Therefore, it is possible to provide a more compact heat exchanger with excellent pressure resistance and easy multi-functional deployment.

(Fourth Embodiment) In the fourth embodiment of the present invention, in addition to the same structure as the third embodiment, the second flow passage 12 and the third flow passage 13 are communicated with each other, and the same fluid is supplied. For example, the fluid flowing through the first flow passage 11 is a high-temperature high-pressure refrigerant, and the fluid flowing through the second flow passage 12 and the third flow passage 13 is low-temperature low-pressure hot water. To do.

According to this, as a single heat exchanger in which the second flow passage 12 and the third flow passage 13 are arranged on both surfaces of the first flow passage 11, a remarkably wide heat transfer area can be secured. It is possible to provide a compact heat exchanger with excellent heat exchange performance. Further, the reliability of the heat exchanger can be improved by selectively allowing the high-pressure side fluid to flow into the first flow path 11 where it is easy to improve the pressure resistance due to the miniaturization of the flow path.

In the above embodiment, the coolant is circulated in the first flow passage 1 and the hot water and the bath water are circulated in the second flow passage 3 and the third flow passage 3, respectively. However, this is not always the case. Instead, it may be used for any fluid such as circulating brine for cooling and heating or using water alone.

Further, in the first and third embodiments, each flow path is illustrated as having a straight line shape, and the fluid flowing through the first flow path and the fluid flowing through the second and third flow paths are Although the flow paths are configured so as to be opposed to each other, the flow paths are not necessarily limited to this, and the flow paths may be formed in a meandering shape, or fluids for heat exchange may be in parallel flow or cross flow. The flow channel shape may be such that

[0041]

As described above, according to the first to sixth aspects of the present invention, the first flow path in which a plurality of flow paths are arranged in parallel on the same plane, and the first flow path are provided. Has a second flow path and a third flow path facing at least one surface formed by, and in order to improve pressure resistance, a fine flow path having a small cross-sectional area is used as the first flow path. When you use it,
By arranging a plurality of these in close contact with each other in parallel on the same plane, it is possible to form a flat and wide heat transfer surface and configure a thin and compact heat exchanger. Also,
By providing the second flow path and the third flow path on at least one surface of the flat first flow path, the fluid flowing through the first flow path and the second and third flow paths are separated from each other. Heat exchange with the flowing fluid can be performed independently or simultaneously. Therefore, it is possible to provide a compact heat exchanger that has excellent pressure resistance and is easy to deploy multiple functions.

[Brief description of drawings]

FIG. 1 is a perspective view showing a configuration of a heat exchanger according to first and second embodiments of the present invention.

FIG. 2 is a sectional view of the heat exchanger.

FIG. 3 is a sectional view of the heat exchanger.

FIG. 4 is a sectional view showing the configuration of heat exchangers of Examples 3 and 4 of the present invention.

FIG. 5 is a sectional view of the heat exchanger.

FIG. 6 is a cross-sectional view of a conventional heat exchanger.

[Explanation of symbols] 1, 11 First channel 2, 12 Second channel 3, 13 Third channel

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Keijiro Kunimoto             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd. (72) Inventor Ryuta Kondo             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd. (72) Inventor Satoshi Imabayashi             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd. (72) Inventor Koji Oka             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd. F term (reference) 3L103 AA05 BB43 CC02 DD52

Claims (6)

[Claims] 1. A first flow path formed by arranging a plurality of flow paths in parallel on the same plane, and a second flow path facing at least one surface on which the first flow path is formed. And a heat exchanger having a third flow path. 2. A first channel formed by arranging a plurality of channels in parallel on the same plane, and a second channel provided so as to face one surface on which the first channel is formed. A heat exchanger having a flow passage and a third flow passage provided so as to face the other surface on which the first flow passage is formed. 3. The heat exchanger according to claim 1, wherein the same fluid as the first flow path is made to flow through either one of the second flow path and the third flow path. 4. The heat exchanger according to claim 1, wherein the second flow path and the third flow path are in communication with each other and the same fluid is circulated. 5. A pipe part communicating with each of the first flow path, the second flow path and the third flow path is planted on only one surface of the first flow path. Item 5. The heat exchanger according to any one of items 1 to 4. 6. The heat according to claim 1, wherein the high-pressure side fluid flows through the first flow passage, and the low-pressure side fluid flows through at least one of the second flow passage and the third flow passage. Exchanger.