JP2004085166A - Heat exchanger, its manufacturing method, and bath water heating system and floor heating system using the heat exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat exchanger and its manufacturing method for preventing the formation of a clearance between the adjacent spiral tubes even if thermally deformed with use and furthermore preventing the degradation of heat exchanger effectiveness. <P>SOLUTION: This heat exchanger is provided with a water flow tube 10 through which a refrigerant flows, and a hot water flow tube 20 through which hot water flows. The water flow tube 10 and the hot water flow tube 20 are respectively formed by winding tubing formed in flat cross section beforehand and combining them after winding so as to alternately come in contact. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a heat exchanger, and more particularly to a heat exchanger that can prevent a heat exchange rate from being deteriorated even when thermally deformed during use, and a method for manufacturing the same.
[0002]
[Prior art]
The heat exchanger is provided with a refrigerant pipe through which a refrigerant flows and a hot water pipe through which high-temperature hot water flows.The heat and heat of the refrigerant and the hot water flowing through these refrigerant pipes and the hot water pipe are converted into gas or fluid outside the pipe material. And heat exchange with it. Here, FIG. 13 shows a conventional hot water pipe 90. As shown in FIG. 13, the hot water pipe 90 is spirally wound.
[0003]
In the method of manufacturing such a spirally-running hot water pipe 90, first, a tube material 91 having a substantially circular cross-sectional area is spirally wound. After the winding, the flowing pipe 90 is compressed from the axial direction of the spiral (the direction of the arrow Z and the direction of the opposite arrow Z) so that the adjacent helical tubes come into contact with each other and the cross-sectional area of the tubing becomes flat. Processing is performed. By forming in this manner, the storage space can be reduced, and the contact area between the adjacent hot water pipes 90 can be increased to increase the heat exchange rate.
[0004]
[Problems to be solved by the invention]
However, copper pipes are usually used for the pipe material constituting the heat exchanger. However, when hot water flows through the hot water pipe 90, the hot water pipe 90 is warped due to thermal deformation. Then, as shown in FIG. 14, a gap 92 is generated between the adjacent hot water pipes 90, 90 of the spiral. That is, there is a problem that the adjacent hot water pipes 90 are changed from surface contact to line contact, and the heat exchange rate is deteriorated.
[0005]
Therefore, the present invention has been devised, and the present invention can prevent a gap from being formed between adjacent tubes of a spiral even if it is thermally deformed with use. It is an object of the present invention to provide a heat exchanger capable of preventing the heat exchange rate from deteriorating, and a method for manufacturing the same.
[0006]
[Means for Solving the Problems]
In order to achieve this object, the heat exchanger according to claim 1 includes a refrigerant pipe through which a refrigerant (low-temperature cooling fluid such as water, hot water, or coolant) flows, and a refrigerant pipe (such as hot water, Freon, or CO ₂ ). A refrigerant pipe through which a high-temperature fluid for heating) flows, wherein the refrigerant pipe and the refrigerant pipe are formed by winding a pipe material previously formed into an elliptical cross section in a spiral shape with an appropriate interval. , And are formed by being combined so as to contact alternately.
In the heat exchanger according to the second aspect, in the heat exchanger according to the first aspect, the refrigerant pipe and the refrigerant pipe are formed in a helical shape by processing pipe materials having different diameters of a perfect circular cross section into different flatness. The tube is formed so that the tube section axial length in the radial direction is the same and the tube section axis length in the spiral axial direction is different.
According to a third aspect of the present invention, in the heat exchanger according to the first or second aspect, the refrigerant pipe and the refrigerant pipe are arranged such that a longitudinal direction of a cross section of the refrigerant pipe and the refrigerant pipe is a radial direction of a spiral. Each is wound to become.
The heat exchanger according to claim 4 is the heat exchanger according to any one of claims 1 to 3, wherein the refrigerant pipe and the refrigerant pipe are separated from each other in a separated state, and a space between adjacent spirals is smaller than a short axis of the pipe cross section. Have been.
The method for manufacturing a heat exchanger according to claim 5 is a method of forming and combining a refrigerant pipe through which a refrigerant flows and a refrigerant pipe through which a refrigerant flows, and a cross section for forming the refrigerant pipe and the refrigerant pipe. A winding step of winding the elliptical pipe members at appropriate intervals, and a combining step of combining the refrigerant pipes and the refrigerant pipes formed in the winding step so as to alternately contact each other. .
The method for manufacturing a heat exchanger according to claim 6 is a method of forming and combining a refrigerant pipe through which a refrigerant flows and a refrigerant pipe through which a refrigerant flows, and a cross section for forming the refrigerant pipe and the refrigerant pipe. A winding step is provided by winding each of the elliptical pipe members at appropriate intervals, and in the winding step, the refrigerant pipe is wound by winding the refrigerant pipe and the refrigerant pipe in an overlapping state. At the same time as the refrigerant pipes are formed, they are combined so that the wound refrigerant pipes and the refrigerant pipes come into contact alternately.
The method for manufacturing a heat exchanger according to claim 7 is the method for manufacturing a heat exchanger according to claim 5 or 6, wherein after the combination of the refrigerant pipe and the refrigerant pipe having an elliptical cross section in the combining step or the winding step, A pressurizing step of applying a compressive load from both ends of the spiral of the refrigerant pipe and the refrigerant pipe in the axial direction is provided.
According to a eighth aspect of the present invention, in the method for manufacturing a heat exchanger according to any one of the fifth to seventh aspects, the flat tubes having different diameters of the perfect circular cross section are subjected to flattening to different flatness factors. In the winding step, there is provided an unbalanced forming step in which the length of one of the short-axis of the pipe section and the long axis of the cross-section of the two pipes is the same. In the forming step, the two pipe materials having the same length are wound so that the direction of the cross-sectional axis of the pipes is the radial direction of the spiral.
According to a ninth aspect of the present invention, in the method for manufacturing a heat exchanger according to any one of the sixth to eighth aspects, in the winding step, the longitudinal axis of the refrigerant pipe and the pipe to be cooled is changed. Both are wound so as to be in the spiral radial direction.
According to a tenth aspect of the present invention, in the method for manufacturing a heat exchanger according to any one of the sixth to ninth aspects, in the winding step, the spiral direction of the refrigerant pipe and the pipe to be cooled with respect to the axial direction of the spiral pipe. It is wound so that the space between adjacent spirals is smaller than the tube cross-sectional axis length.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. Of course, the following examples are merely preferred embodiments of the present invention, and the technical scope of the present invention is not limited to the following examples. For example, in the following embodiment, the case where the refrigerant is water and the refrigerant is hot water is described, but the refrigerant may be a liquid other than water or even a gas (for example, coolant or Similarly, the refrigerant to be cooled may be a liquid other than hot water or may be a gas (for example, Freon 22, CO ₂ , or methane gas).
[0008]
FIG. 1 is a side view of a heat exchanger 100 according to an embodiment of the present invention, FIG. 2 is a plan view of the heat exchanger 100 from the direction of arrow A, and FIG. It is sectional drawing in the -III line. As shown in FIGS. 1 to 3, the heat exchanger 100 includes a flowing water pipe 10 and a flowing water pipe 20.
[0009]
The flowing water pipe 10 is a pipe through which a refrigerant (water) flows, and a pipe material (for example, a pipe cross-section major axis length: 20.44 mm, a pipe cross-section minor axis length: 8.4 mm) that has been subjected to flattening in advance has a spiral shape. It is a tube formed by being wound into a tube. The refrigerant flowing through the water pipe 10 flows into and out of the water pipe 10 via the refrigerant pipe side connection ports 11 provided at both ends of the water pipe 10.
[0010]
On the other hand, the flowing water pipe 20 is a pipe through which hot water flows, and like the flowing water pipe 10, a pipe material (for example, a pipe cross-section major axis length: 20.44 mm, a pipe cross-section minor axis length: 8.4 mm) is a pipe formed by being spirally wound into the same diameter as the flowing water pipe 10. The hot water flowing through the hot water pipe 20 flows into and out of the hot water pipe 20 through the hot water pipe side connection ports 21 provided at both ends of the hot water pipe 20. Here, in order to facilitate understanding of the invention, the one with the lower temperature of the liquid flowing inside is the flowing water pipe 10, and the one with the higher temperature is the flowing water pipe 20 (that is, the pipe through which the refrigerant flows is the flowing water pipe). Tube).
[0011]
As shown in FIG. 3, the running water pipe 10 and the running water pipe 20 are both formed in a flat shape (elliptical shape), and the running water pipe 10 and the running water pipe 20 thus flattened have the same diameter. It is spirally wound. Here, the flowing water pipe 10 and the flowing water pipe 20 are wound so that the radial direction of the spiral is the direction of the pipe cross-section long axis (large diameter) (φ _H ) of the flowing water pipe 10 and the flowing water pipe 20, respectively. I have. Therefore, after the flowing water pipe 10 and the flowing water pipe 20 are combined, if the flowing water in the flowing flowing water pipe 20 and the flowing water pipe 10 are thermally deformed due to the flow of the hot water in the flowing flowing water pipe 20, the pipe section long axis (small diameter) ) The contact area with each other can be increased as compared with the case of winding in the (φ _L ) direction.
[0012]
Further, the flowing water pipe 10 and the flowing water pipe 20 are both formed into a flat shape before the winding processing, and the flowing water pipe 10 and the flowing water pipe 20 after the flat processing are performed in this manner. Are combined. For this reason, the stress which the flowing water pipe 10 and the flowing water pipe 20 have can be reduced, and when the hot water circulates through the flowing water pipe 20, the amount of heat which the hot water has becomes the flowing water pipe 20, furthermore, the flowing water pipe. The heat is transmitted to the flowing water pipe 10 via the heat pipe 20, and even if the heat is deformed due to the transmission of the heat, it is possible to prevent a gap from being generated between the adjacent flowing water pipe 10 and the flowing water pipe 20. Can be. Further, as shown in FIG. 4, when thermally deformed during use, the contact area between the flowing water pipe 10 and the flowing water pipe 20 increases, and the heat exchange rate can be increased.
[0013]
Next, a method of manufacturing the heat exchanger 100 configured as described above will be described with reference to FIGS. First, as shown in FIG. 5, a straight-Heisei type process of flattening (buckling) a straight pipe material 11 (21) having a substantially circular cross section (tube diameter: 15.88 mm) is performed (flattening). After that, it is cut to an appropriate length before flattening). After the flattening step, a winding process of spirally winding the flattened tube 12 (22) is performed. At this time, the flat direction (the direction of the pipe cross-section major axis (φ _H )) is the radial direction of the spiral, and the interval (gap) between adjacent spirals is set to the length (φ _L ) of the pipe cross-section minor axis. It is wound to become. With the winding, the flowing water pipe 10 (the flowing water pipe 20) is formed. After the winding, as shown in FIG. 6, a combination process is performed to combine the spirally formed running water pipes 10 and running water pipes 20 so that they alternately contact each other.
[0014]
After the combination of the flowing water pipe 10 and the flowing water pipe 20, a pressurizing step of applying a compressive load from both ends in the axial direction of the spiral so that the two pipes are in close contact with each other (pipe cross-section short axis length: 8.0) is performed. With the end of the process, the manufacturing process of the heat exchanger 100 ends.
[0015]
"Second embodiment"
Next, another embodiment (second embodiment) different from the above-described embodiment will be described with reference to FIG. The same portions as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. Only different portions will be described.
[0016]
The heat exchanger 200 according to the second embodiment is different from the heat exchanger 100 according to the first embodiment in that the interval between adjacent spirals is changed. More specifically, in the heat exchanger 100 of the first embodiment, the interval between the spirals of the flowing water pipe 10 and the flowing water pipe 20 is substantially equal to the length of the short axis of the cross section of the pipe. In the refrigerant pipe 210 and the hot-water pipe 220 constituting the heat exchanger 200 of the first embodiment, before the combination (in a separated state), the interval between the adjacent spirals is approximately half (1/2 (2) 1) φ _L ). Therefore, when the wound refrigerant pipe 210 and the hot water pipe 220 are combined, the refrigerant pipe 210 and the hot water pipe 220 both extend in the spiral axial direction, and after the combination, the expanded refrigerant pipe 210 and Since the hot water pipe 220 is about to contract, the contraction force allows the combined refrigerant pipe 210 and hot water pipe 220 to be in close contact with each other (press-contact). As a result, it is possible to prevent the refrigerant pipe 210 and the hot water pipe 220 after being combined from being separated carelessly.
[0017]
"Third embodiment"
Next, another embodiment (third embodiment) different from the above-described embodiment will be described with reference to FIGS. The same parts as those in the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted. Only different parts will be described.
[0018]
In the heat exchanger 300 of the third embodiment, the length of the pipe cross-section major axis (φ _H1 ) of the refrigerant pipe 310 and the length of the pipe cross-section major axis (φ _H2 ) of the hot water pipe 320 that constitute the heat exchanger 300 are described. Are formed to have the same length, while the length of the tube cross-section short axis (φ _L1 ) of the refrigerant tube 310 is different from the length of the tube cross-section short axis (φ _L2 ) of the hot water pipe 320. Have been. More specifically, the refrigerant pipe 310 is formed so that the length of the pipe cross-section minor axis (φ _L1 ) is longer than the pipe cross-section minor axis (φ _L2 ) of the hot water pipe 320. Therefore, the heat exchange rate between the refrigerant pipe 310 and the hot water pipe 320 (more specifically, the cooling rate of the hot water flowing in the hot water pipe 320) can be increased. In recent years, heat exchangers using CO ₂ as a refrigerant have been marketed. However, even when a refrigerant having a high temperature and a high pressure during compression as compared with Freon (R-22) is used, a large amount of heat generated is generated. Can be dissipated. As described above, by changing the ratio of the lengths of the short-axis (φ _L1 ) of the cross-section of the refrigerant pipe 310 and the short-axis (φ _L2 ) of the cross-section of the hot-water pipe 320, cooling of the hot water flowing through the hot-water pipe 320 is performed. The rate (in other words, the upper temperature rate of the water flowing in the water pipe 310) can be changed to a desired size.
[0019]
In addition, the refrigerant pipe 310 and the hot water pipe 320 are formed by processing pipe materials having a circular cross section into different flat rates. Therefore, even when the length of the pipe cross-section major axis (φ _H1 ) of the refrigerant pipe 310 and the length of the pipe cross-section major axis (φ _H2 ) of the hot water pipe 320 are the same, even when both are flat, The pipes 310 and 320 can have the same thickness. In addition, even when the refrigerant has a characteristic of high heat and high pressure during compression, the refrigerant pipe 310 and the hot water pipe 320 are damaged (for example, cracked or perforated) due to stress or pressure. Can be prevented.
[0020]
Next, application examples of the heat exchangers 100, 200, and 300 of the present invention will be described with reference to FIGS. 10 and 11 (hereinafter, for convenience, the description will be made using the heat exchanger 100 of the first embodiment). ).
[0021]
FIG. 10 is a schematic diagram of a bath water heater system 1000 in which the heat exchanger 100 is used in combination with a hot water supply tank 501 (a type of water heater), and FIG. 11 is a schematic diagram of a floor heating system 2000. The bath water heating system 1000 includes a hot water supply tank 1001, a bath tub 1002, and a mixing valve 1003 connected by a pipe 1004, and mixes hot water (also used for drinking water) heated in the hot water supply tank 1001 with a mixing valve. The water can be supplied directly via the heat exchanger 1003, and the stored water in the bathtub 502 is heated (or kept warm) using the heat exchanger 100. On the other hand, the floor heating system 2000 heats the floor 503, and is configured in the same manner as the bath water heater system 1000.
[0022]
Here, since the heat exchanger 100 is configured such that the refrigerant pipe 10 and the hot water pipe 20 are alternately contacted with each other, the heat exchanger 100 can be installed outside the hot water supply tank 501. As a result, unlike the conventional system 9000 as shown in FIG. 15, even when the pipe 1004a inside the hot water tank 501 is broken, the bath water mixes with the drinking water in the hot water tank 501 or the tap water does not. It is possible to prevent chlorine from being mixed (that is, it is possible to ensure hygiene and prevent corrosion inside the hot water supply tank 501). Further, even if it is not a dedicated type such as the hot water tank 901 in which the heat exchanger 91 of the related art is built, a general-purpose type hot water tank can be effectively utilized as it is. Further, although not shown, the size of the hot water supply tank 501 can be reduced, and the hot water supply tank 501 can be used in combination with a water heater other than the hot water supply tank 501.
[0023]
As described above, the present invention has been described based on the embodiments. However, it is needless to say that the above embodiments can be variously modified and modified without departing from the spirit of the present invention. Also includes those various improved modifications.
[0024]
For example, in the third embodiment shown in FIGS. 8 and 9, the longitudinal axis (φ _H1 ) of the refrigerant pipe 310 and the longitudinal axis (φ _H2 ) of the flowing water pipe 320 of the heat exchanger 300 are different. The direction is the radial direction of the helix. However, for example, as shown in FIG. 12, the tube cross-section long axis phi _H1 of the refrigerant pipe 310 may be such that the axial direction of the spiral. That is, the direction of the pipe cross-section major axis (φ _H1 , φ _H2 ) of at least one of the refrigerant pipe 310 and the hot water pipe 320 may be the spiral axial direction.
[0025]
The present invention includes the following inventions.
In a heat exchanger provided with a refrigerant pipe through which a refrigerant flows and a hot water pipe through which hot water flows, each of the refrigerant pipe and the hot water pipe is formed by winding a pipe material whose cross section is previously formed into a flat shape. A heat exchanger (A), which is formed and combined so as to contact alternately after the winding process.
In the heat exchanger (A), the refrigerant pipe and the hot water pipe are each wound so that the large-diameter direction of the flat cross section of the refrigerant pipe and the hot water pipe is the radial direction of the spiral. Heat exchanger (B).
The heat exchanger (C) in the heat exchanger (A) or (B), wherein the interval between the adjacent spirals in the separated state of the refrigerant pipe and the hot water pipe is smaller than the small diameter of the cross section.
In a method for manufacturing a heat exchanger having a refrigerant pipe through which a refrigerant flows and a hot water pipe through which hot water flows, an oblique-shaped process in which each of the refrigerant tube and the hot-water tube is formed into a flat shape; Step of winding the refrigerant pipe and the hot water pipe provided with each other at intervals, and a combination step of combining the refrigerant pipe and the hot water pipe after the winding process in the winding step so as to come into contact alternately. A method (D) for producing a heat exchanger, comprising:
In the method (D) for producing a heat exchanger, in the winding step, the heat exchanger is wound so that the longitudinal direction of the cross section of the refrigerant pipe and the hot water pipe is the radial direction of the spiral. Production method (E).
In the method (D) or (E) for producing a heat exchanger, in the winding step, the spiral is wound so that an interval between adjacent spirals is smaller than a small cross-sectional diameter. F).
[0026]
【The invention's effect】
According to the heat exchanger of the first aspect, the refrigerant pipe and the refrigerant pipe that are respectively formed by alternately winding the pipe material previously formed into an elliptical cross-section into a spiral shape with an appropriate interval are alternately formed. Since it is configured by being combined so as to be in contact with each other, it is possible to reduce the potential stress in each of the refrigerant pipe and the refrigerant pipe, and as a result, the refrigerant pipe and the refrigerant pipe undergo thermal deformation due to aging with use. Also in this case, there is an effect that a gap can be prevented from being generated between the refrigerant pipe and the pipe to be cooled.
According to the heat exchanger according to the second aspect, in addition to the effects achieved by the heat exchanger according to the first aspect, the pipe material having a perfect circular cross-section having a different diameter is processed into a different flattening ratio, so that the radial direction of the helix can be improved. The refrigerant pipes and the refrigerant pipes are formed so that the pipe cross-section axis lengths of the refrigerant pipes are the same and the pipe cross-section axis lengths of the spiral pipes are different from each other. By changing the length ratio, there is an effect that the heat exchange rate between the refrigerant pipes and the refrigerant pipes that are alternately combined can be changed to a desired size. In addition, the thickness of the refrigerant pipe and the pipe to be cooled can be formed to the same thickness, and thus, even when stress due to heat generation or the like is applied, the refrigerant pipe and the pipe to be cooled are damaged. There is an effect that can be prevented. In addition, the operation of winding the refrigerant pipe and the refrigerant pipe can be simplified, and the refrigerant pipe and the refrigerant pipe after combination can be prevented from being inadvertently separated. Play.
According to the heat exchanger of the third aspect, in addition to the effects of the heat exchanger of the first or second aspect, the refrigerant tube and the refrigerant to be cooled are further arranged such that the longitudinal direction of the tube cross section is the radial direction of the spiral. Since the tubes are respectively wound, there is an effect that the heat exchange rate of both the adjacent refrigerant tube and the refrigerant tube can be increased.
According to the heat exchanger according to the fourth aspect, in addition to the effect of the heat exchanger according to any one of the first to third aspects, the refrigerant pipe and the refrigerant pipe are arranged such that the space between adjacent spirals is short. Since it is smaller than the shaft, there is an effect that the refrigerant pipe and the refrigerant pipe combined after winding can be brought into close contact with each other by the contraction force of the spring.
According to the method of manufacturing a heat exchanger according to the fifth aspect, a refrigerant pipe and a refrigerant pipe are formed by winding a pipe material formed in advance into an elliptical cross section into a spiral shape with an appropriate interval. Are combined so that they alternately come into contact with each other, so that the potential stress in each of the refrigerant pipe and the refrigerant pipe can be reduced. Thus, even when the refrigerant pipe is thermally deformed, it is possible to prevent a gap from being generated between the refrigerant pipe and the refrigerant pipe that are in contact with each other.
According to the method of manufacturing a heat exchanger according to the sixth aspect, the refrigerant pipe and the refrigerant pipe are formed by winding a pipe formed in advance into an elliptical cross-section into a spiral with an appropriate interval. Are combined so that they alternately come into contact with each other, so that the potential stress in each of the refrigerant pipe and the refrigerant pipe can be reduced. Thus, even when the refrigerant pipe is thermally deformed, it is possible to prevent a gap from being generated between the refrigerant pipe and the refrigerant pipe that are in contact with each other.
According to the method of manufacturing a heat exchanger according to claim 7, in addition to the effects of the heat exchanger according to claim 5, the refrigerant pipe and the refrigerant pipe having an elliptical cross section in the combining step or the winding step are formed. After the combination, a compressive load is applied from both ends of the spiral of the refrigerant pipe and the refrigerant pipe by the pressurizing step, so that the combined refrigerant pipe and the refrigerant pipe can be brought into close contact with each other and accumulated at the contact portion. This has the effect that (latent) stress can be reduced.
According to the method for manufacturing a heat exchanger according to claim 8, in addition to the effect of the heat exchanger according to any one of claims 5 to 7, the tubular material having a cross section of a perfect circular shape having a different diameter due to the unbalanced step. Are processed so as to have different flatness ratios, and are formed so that either one of the tube cross-section short axis and the tube cross-section long axis has the same length. By changing the ratio of the length (axial direction of the helix), there is an effect that the heat exchange rate between the refrigerant pipe and the refrigerant pipe that are alternately combined can be changed to a desired size. In addition, the thickness of the refrigerant pipe and the pipe to be cooled can be formed to the same thickness, and thus, even when stress due to heat generation or the like is applied, the refrigerant pipe and the pipe to be cooled are damaged. There is an effect that can be prevented. In addition, the operation of winding the refrigerant pipe and the refrigerant pipe can be simplified, and the refrigerant pipe and the refrigerant pipe after combination can be prevented from being inadvertently separated. Play.
According to the method of manufacturing a heat exchanger according to the ninth aspect, in addition to the effect of the method of manufacturing a heat exchanger according to any one of the fifth to eighth aspects, a refrigerant pipe and a refrigerant pipe in the winding step are further provided. Is wound so that the long axis direction of the cross section of the tube is the radial direction of the spiral, so that it is possible to increase the contact area between the adjacent refrigerant pipe and the refrigerant pipe combined after the winding.
In the method for manufacturing a heat exchanger according to claim 10, in addition to the effect of the method for manufacturing a heat exchanger according to any of claims 5 to 9, the winding step further includes a refrigerant pipe and a refrigerant pipe. It is wound so that the interval between adjacent spirals is smaller than the axial length of the pipe cross section with respect to the axial direction of the spiral, so that the combined refrigerant pipe and refrigerant pipe can be brought into close contact with each other by the contraction force of the spring after the winding. There is an effect that can be.
[Brief description of the drawings]
FIG. 1 is a side view of a heat exchanger according to an embodiment of the present invention.
FIG. 2 is a plan view of the heat exchanger as viewed from an arrow A direction.
FIG. 3 is a sectional view taken along line III-III of the heat exchanger.
FIG. 4 is an enlarged cross-sectional view showing a state in which a flowing water pipe and a flowing hot water pipe constituting the heat exchanger are thermally deformed.
FIG. 5 is a view showing a process of manufacturing a flowing water pipe (flowing water pipe) constituting the heat exchanger.
FIG. 6A is a perspective view of a flowing water pipe and a flowing hot water pipe constituting the heat exchanger, and FIG. 6B is a perspective view showing a state where the flowing water pipe and the flowing hot water pipe are combined. is there.
FIG. 7A is a perspective view of a flowing water pipe and a flowing water pipe constituting the heat exchanger of the second embodiment, and FIG. 7B shows a state where the flowing water pipe and the flowing water pipe are combined. FIG.
FIG. 8 is a side view of a heat exchanger according to a third embodiment.
FIG. 9 is an enlarged cross-sectional view of a flowing water pipe and a flowing hot water pipe constituting the heat exchanger shown in FIG.
FIG. 10 is a diagram showing an installation example of the heat exchanger of the present invention.
FIG. 11 is a view showing another installation example of the heat exchanger of the present invention.
FIG. 12 is a sectional view of a heat exchanger according to a fourth embodiment.
FIG. 13 is a perspective view of a conventional heat exchanger.
FIG. 14 is a cross-sectional view showing a state in which a gap is generated between adjacent pipes due to thermal deformation of the pipes constituting the heat exchanger of the related art.
FIG. 15 is a diagram showing an example of installation of a heat exchanger of the related art.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Flow water pipe 20 Flow water pipe 100 Heat exchanger 200 Heat exchanger 300 Heat exchanger 210 Flow water pipe 220 Flow water pipe 310 Flow water pipe 320 Flow water pipe

Claims (10)

In a heat exchanger including a refrigerant pipe through which a refrigerant flows and a refrigerant pipe through which a refrigerant flows,
The refrigerant pipe and the refrigerant pipe are formed by winding a tubing previously formed into an elliptical cross section in a spiral shape with an appropriate interval, and are combined so as to contact alternately. A heat exchanger. The refrigerant pipe and the refrigerant pipe have the same tube cross-sectional axis length in the radial direction of the spiral and the pipe in the axial direction of the spiral by processing the pipe materials having a perfect circular cross section of different diameters into different flatness. The heat exchanger according to claim 1, wherein the heat exchanger is formed so as to have different cross-sectional axis lengths. The heat pipe according to claim 1, wherein the refrigerant pipe and the refrigerant pipe are respectively wound such that a longitudinal axis of the cross section of the refrigerant pipe and the refrigerant pipe becomes a spiral radial direction. 4. Exchanger. The heat exchanger according to any one of claims 1 to 3, wherein, in the separated state, the interval between adjacent spirals of the refrigerant pipe and the refrigerant pipe is smaller than the short axis of the cross section of the pipe. In a method for manufacturing a heat exchanger including a refrigerant pipe through which a refrigerant flows and a refrigerant pipe through which a refrigerant flows,
A winding step by winding a tube material having an elliptical cross section at appropriate intervals to form the refrigerant tube and the refrigerant tube,
A combining step of combining the refrigerant pipes and the refrigerant pipes formed in the winding step so as to come into contact alternately with each other. In a method for manufacturing a heat exchanger including a refrigerant pipe through which a refrigerant flows and a refrigerant pipe through which a refrigerant flows,
A winding step is provided by winding a pipe material having an elliptical cross section at appropriate intervals to form the refrigerant pipe and the refrigerant pipe,
In the winding step, by winding the refrigerant pipe and the refrigerant pipe in an overlapping state, the refrigerant pipe and the refrigerant pipe are formed, and at the same time, the refrigerant pipe and the refrigerant pipe after winding come into contact alternately. The method for manufacturing a heat exchanger, wherein the heat exchanger is combined. After combining the refrigerant pipe and the refrigerant pipe having an elliptical cross section in the combination step or the winding step, a pressurizing step of applying a compressive load from both axial ends of the spiral of the refrigerant pipe and the refrigerant pipe is provided. The method for producing a heat exchanger according to claim 5. By flattening the pipe materials having different diameters in the shape of a perfect circle in cross section, the two flat materials are formed so that either one of the short axis of the pipe cross section or the long axis of the cross section of the pipe becomes the same. Equipped with a Heisei type process,
8. The winding process according to claim 5, wherein the winding process is performed such that the pipe section axial direction of both pipe materials having the same length in the unbalanced forming process is the radial direction of the spiral. 3. The method for producing a heat exchanger according to item 1. 9. The heat exchanger according to claim 6, wherein in the winding step, the refrigerant pipe and the pipe to be cooled are wound such that the longitudinal axes of the pipes are both in the spiral radial direction. 10. Manufacturing method. In the winding step, the winding is performed such that a space between adjacent spirals is smaller than an axial length of a cross section of the spirals of the refrigerant pipe and the refrigerant pipe in the axial direction of the spiral. A method for manufacturing the heat exchanger according to any one of the above.

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