JP2005201536A - Heat exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compact heat exchanger without reducing a heat exchange amount regarding the heat exchanger for exchanging heat between a refrigerant and water. <P>SOLUTION: This heat exchanger is provided with a perforated tube 3a through which a fluid A flows, and a flat tube 4a of flat cross-sectional shape through which a fluid B flows. The perforated tube 3a and the flat tube 4a are overlapped to be orthogonal to each other, and the unnecessary space of the heat exchanger per unit volume becomes small. The volume of the heat exchanger can thereby be reduced to obtain the compact heat exchanger without reducing the heat exchange amount. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a heat exchanger that exchanges heat between refrigerant and water.

  Conventionally, this type of heat exchanger includes one in which a first pipe through which a refrigerant flows and a second pipe through which water flows are arranged in parallel (see, for example, Patent Document 1).

  Hereinafter, the conventional heat exchanger will be described with reference to the drawings.

  FIG. 9 is a schematic configuration diagram of a conventional heat exchanger. As shown in FIG. 9, the conventional heat exchanger has a first pipe 91 having a flat shape and a plurality of small flow paths through which refrigerant flows, and water that flows through the first pipe and the flat portion. The contacted flat second tube 92 is wound in a coil shape.

  The operation of the heat exchanger configured as described above will be described below.

The high-temperature pressurized refrigerant is branched and circulated into a plurality of small flow paths in the first pipe 91, and the heat of the refrigerant is heated to the second pipe 92 in thermal contact with the first pipe 91. Conduct. Water circulates in the second pipe 92, and the heat of the second pipe 92 is transmitted to the water, and the water is heated. Here, by winding the first tube 91 and the second tube 92 in a coil shape, the second tube 92 is sandwiched between the first tubes 91 and can absorb the heat of the refrigerant from the upper and lower flat surfaces. it can.
JP 2002-107069 A

  However, the above-described conventional configuration has a problem that an unnecessary space without a tube is formed because the tube is wound in a coil shape, and the volume of the heat exchanger is increased.

  The present invention solves the above-described conventional problems, and an object thereof is to provide a compact heat exchanger without reducing the amount of heat exchange.

  In order to solve the above-described conventional problems, the heat exchanger of the present invention includes a first pipe (generally referred to as a first pipe such as a round pipe, a multi-hole pipe, and a modified pipe) through which a fluid A flows, and a fluid B The second tube having a flat cross-section is provided, and the first tube and the second tube are overlapped so as to be orthogonal to each other.

  This reduces the unnecessary space of the heat exchanger per unit volume.

  Moreover, the heat exchanger of this invention arrange | positions so that a 1st pipe | tube and a 2nd pipe | tube may be laminated | stacked on multiple layers.

  Accordingly, the flat portion of the second tube can be sandwiched between the first tube without forming an unnecessary space in the horizontal direction.

  Moreover, the heat exchanger of this invention arrange | positions the meandering 1st pipe | tube and the 2nd pipe | tube, and has arrange | positioned.

  This reduces the unnecessary space formed in the vertical direction.

  Moreover, the heat exchanger of this invention pinches | interposes the perimeter of the 1st pipe | tube which consists of a some pipe | tube with which the fluid A distribute | circulates with the 2nd pipe | tube.

  As a result, the entire surface of the first tube is in contact with the second tube, and at the same time, the fluid B is disturbed by the irregularities inside the second tube.

  Further, the heat exchanger of the present invention includes a fourth pipe comprising a plurality of third pipes through which the fluid A flows and a restraining member that restrains the third pipe, and a second pipe through which the fluid B flows. And the fourth tube and the second tube are overlapped so that the fourth tube and the second tube are parallel to each other.

  As a result, the contact area between the fourth tube and the second tube increases, and the restraining member and the third tube are made of different materials.

  The heat exchanger of the present invention includes a first pipe through which the fluid A flows and a second pipe through which the fluid B flows in a flat shape, and the first pipe and the second pipe are orthogonal to each other. Thus, the volume of the heat exchanger can be reduced.

  The heat exchanger of the present invention can provide a heat exchanger that is compact in the width direction and has a large heat exchange amount by stacking the first tube and the second tube in multiple layers.

  Moreover, the heat exchanger of this invention can make a heat exchanger thin by arrange | positioning the meandering-shaped 1st pipe | tube and 2nd pipe | tube so that it may overlap.

  Moreover, the heat exchanger of the present invention sandwiches the entire circumference of the first pipe composed of a plurality of pipes through which the fluid A flows with the second pipe, so that heat conduction from the first pipe to the second pipe is achieved. , The heat transfer from the second pipe to the fluid B is promoted, and the amount of heat exchange can be increased.

  Further, the heat exchanger of the present invention includes a fourth pipe comprising a plurality of third pipes through which the fluid A flows and a restraining member that restrains the third pipe, and a second pipe through which the fluid B flows. And making the fourth tube thinner and lighter than aluminum alone by superimposing the fourth tube and the second tube so that the fourth tube and the second tube are parallel to each other it can.

  In the first aspect of the present invention, the first pipe through which the fluid A flows (generally referred to as a first pipe such as a round pipe, a multi-hole pipe, and an irregular pipe) and the cross section through which the fluid B flows are flat. 2 pipes, the first pipe and the second pipe are overlapped so as to be orthogonal to each other, and the unnecessary space of the heat exchanger per unit volume is reduced, so the volume of the heat exchanger Can be reduced.

  In addition to the invention described in claim 1, the invention described in claim 2 is arranged such that the first tube and the second tube are stacked in multiple layers, and an unnecessary space is formed in the horizontal direction. Since the flat part of a 2nd pipe | tube is inserted | pinched between the 1st pipe | tubes without doing, the heat exchanger which is compact in the width direction and has a large heat exchange amount can be provided.

  In addition to the invention of claim 1, the invention described in claim 3 is an arrangement in which the meandering first tube and the second tube are overlapped, and is not required to be formed in the vertical direction. Space can be reduced and the heat exchanger can be made thinner.

  According to a fourth aspect of the present invention, in the first to third aspects of the invention, the entire circumference of the first pipe composed of a plurality of pipes through which the fluid A flows is sandwiched between the second pipes. Since the entire surface of one tube is in contact with the second tube and the fluid B is disturbed by the irregularities on the inner surface of the second tube, the heat conduction from the first tube to the second tube increases, Heat transfer from the second pipe to the fluid B is promoted, and the amount of heat exchange can be increased.

  According to a fifth aspect of the present invention, there is provided a fourth pipe comprising a plurality of third pipes through which the fluid A flows and a restraining member for restraining the third pipe, and a second pipe through which the fluid B flows. Provided, the fourth tube and the second tube are overlapped so that the fourth tube and the second tube are parallel, and the contact area between the fourth tube and the second tube increases. The amount of heat exchange can be increased, and the third tube can be easily formed such as a grooved shape, such as copper with good thermal conductivity, such as aluminum with good thermal conductivity, such as light aluminum and high thermal conductivity. Since the third tube can be made of a different material, the fourth tube can be made thinner and lighter than aluminum alone.

  The invention according to claim 6 is the invention according to claim 5, wherein the restraining member is made of a highly heat conductive material, and the thermal conductivity of the third tube and the second tube is improved. The amount of heat exchange between fluid A and fluid B can be increased.

  The invention according to claim 7 is the invention according to claims 1 to 6, wherein a turbulent flow promoting material is provided in the second pipe, and the flow of the fluid B in the second pipe is disturbed. The heat transfer coefficient between the second pipe and the fluid B is improved, and the amount of heat exchange can be increased.

  The invention according to claim 8 is the invention according to claims 1 to 7, wherein the first tube or the third tube is an internally grooved tube, and the contact area between the fluid A and the first tube Therefore, the amount of heat exchange can be increased.

  The invention according to claim 9 is the invention according to claims 1 to 8, wherein the heat insulating material covering the outer periphery of the heat exchanger is a vacuum heat insulating material, and heat transfer to the outside air is possible even if the thickness is thin. Since it can prevent, a heat insulating material can be made thin.

  The invention of claim 10 is the invention of claims 1 to 9, wherein the fluid A is carbon dioxide and the fluid B is water, and can be used as a water / heat exchanger for a heat pump water heater. Therefore, by obtaining a high heat pump effect, the pipe length necessary for a predetermined capacity can be shortened and the size can be reduced.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a cross-sectional view of a main part of a heat exchanger according to Embodiment 1 of the present invention. FIG. 2 is a perspective sectional view of the heat exchanger. FIG. 3 is a cross-sectional view of the main part of the heat exchanger provided with the turbulence promoting material in FIG. FIG. 4 is a cross-sectional view of a main part of the heat exchanger provided with the vacuum heat insulating material in FIG. FIG. 5 is a cross-sectional view of a main part of a heat exchanger according to another embodiment.

  In FIG. 1, a heat exchanger 1a includes a flat multi-hole tube 3a having a plurality of flow paths 2a through which carbon dioxide flows, and a flat tube 4a having a flat cross section through which water flows. The flat portions of the multi-hole tube 3a and the flat tube 4a are joined so that the multi-hole tube 3a and the flat tube 4a are orthogonal to each other.

  In FIG. 2, the multi-hole tube 3a and the flat tube 4a are bent in a meandering shape so as to be alternately folded in the vertical direction, and the flat portions of the multi-hole tube 3a and the flat tube 4a are the multi-hole tube 3a and the flat tube 4a. Are joined in multiple layers so as to be orthogonal.

  In FIG. 3, the turbulent flow promoting material 5 is provided inside the flat tube 4a of the heat exchanger in which the multi-hole tube 3a and the flat tube 4a are stacked so as to be orthogonal to each other.

  In FIG. 4, the outer periphery of the heat exchanger 1 a that is stacked so that the multi-hole tube 3 a and the flat tube 4 a are orthogonal to each other is covered with a vacuum heat insulating material 6.

  The operation of the heat exchanger configured as described above will be described below.

  High-temperature pressurized carbon dioxide circulates in the flow path 2a provided in the multi-hole pipe 3a, and the high-temperature carbon dioxide flows through the flow path 2a, whereby the multi-hole pipe 3a is heated. The heat transferred to the multi-hole tube 3a is transferred to the flat tube 4a from the contact surface with the flat tube 4a, and the flat tube 4a is heated. Low-temperature water circulates in the flat tube 4a, and the water circulating in the flat tube 4a is heated by heating the flat tube 4a.

  Here, when the multi-hole tube 3a and the flat tube 4a are bent in a meandering shape in the vertical direction so as to be orthogonally folded, the multi-hole tube 3a and the flat tube 4a are flat without forming an unnecessary space in the horizontal direction. It arrange | positions so that the flat part of the pipe | tube 4a may be pinched | interposed with the multi-hole pipe | tube 3a.

  Here, when the turbulent flow promoting material 5 formed by twisting a plate is provided in the flat tube 4 a, the flow in the flat tube 4 a circulates while being disturbed by the turbulent flow promoting material 5. Moreover, when the heat insulating material wound around the outer periphery of the heat exchanger 1a is the vacuum heat insulating material 6, it is possible to prevent heat from being released by the thin heat insulating material. When the multi-hole tube 3a is an inner grooved tube, the contact area between the carbon dioxide and the multi-hole tube 3a increases due to the unevenness of the inner surface.

  As shown in FIG. 5, the same effect can be obtained even when the multi-hole tube 3a is a plurality of tubes 7a.

  In the present invention, the fluid A is carbon dioxide and the fluid B is water, but the fluids A and B are not limited to this.

  As described above, in the heat exchanger according to the first embodiment, the multi-hole tube 3a or the tube 7a through which the fluid A flows and the flat tube 4a having a flat cross-section through which the fluid B flows are provided. Since the tube 7a and the flat tube 4a are overlapped so as to be orthogonal to each other, and an unnecessary space of the heat exchanger 1a per unit volume is reduced, the volume of the heat exchanger 1a can be reduced.

  Further, the heat exchanger of the present embodiment is arranged so that the multi-hole tube 3a and the flat tube 4a are stacked in multiple layers, and the flat portion of the flat tube 4a without forming an unnecessary space in the horizontal direction. Can be sandwiched by the multi-hole tube 3a, so that the heat exchanger 1a which is compact in the width direction and has a large heat exchange amount can be provided.

  Further, the heat exchanger according to the present embodiment is provided with the turbulent flow promoting material 5 in the flat tube 4a, and disturbs the flow of the fluid B in the flat tube 4a. The heat transfer rate is improved and the amount of heat exchange can be increased.

  In the heat exchanger of this embodiment, the contact area between the fluid A and the multi-hole tube 3a or the tube 7a is increased by using the multi-hole tube 3a or the tube 7a as an internally grooved tube. Can be increased.

  Moreover, the heat exchanger of this Embodiment is the heat insulating material which covers the heat exchanger outer periphery as the vacuum heat insulating material 6, and since heat transfer to outside air can be prevented even if it is thin, heat insulation The material can be thinned.

  In addition, the heat exchanger according to the present embodiment uses fluid A as carbon dioxide and fluid B as water, and can be used as a water / heat exchanger for a heat pump water heater, so that a high heat pump effect can be obtained. The tube length necessary for a predetermined capacity can be shortened and the size can be reduced.

(Embodiment 2)
FIG. 6 is a perspective view of a heat exchanger according to Embodiment 2 of the present invention.

  In FIG. 6, the multi-hole tube 3b and the flat tube 4b are bent in a meandering manner so as to be horizontal, and the flat portions of the multi-hole tube 3b and the flat tube 4b are perpendicular to each other. It is overlapped and joined so that it becomes.

  The operation of the heat exchanger configured as described above will be described below.

  High-temperature pressurized carbon dioxide circulates in the flow path 2b provided in the multi-hole pipe 3b, and the multi-hole pipe 3b is heated by the high-temperature carbon dioxide flowing in the flow path 2b. The heat transferred to the multi-hole tube 3b is transferred to the flat tube 4b from the contact surface with the flat tube 4b, and the flat tube 4b is heated. Low-temperature water circulates in the flat tube 4b, and the water circulating in the flat tube 4b is heated by heating the flat tube 4b. Here, the multi-hole tube 3b and the flat tube 4b are bent in a meandering manner so as to be horizontal, and the multi-hole tube 3b and the flat tube 4b are joined so as to be orthogonal to each other, so that they are not formed in the vertical direction. Space becomes smaller. Further, when a plurality of multi-hole tubes 3b and flat tubes 4b are stacked, the heat transfer area can be further increased.

  In the present invention, the fluid A is carbon dioxide and the fluid B is water, but the fluids A and B are not limited to this.

  As described above, the heat exchanger according to the second embodiment is configured such that the meandering multi-hole tube 3b and the flat tube 4b are overlapped, and an unnecessary space formed in the vertical direction is reduced. The exchanger 1b can be made thin, and when a plurality of multi-hole tubes 3b and flat tubes 4b are stacked, the heat transfer area can be further increased, so that the amount of heat exchange can be increased.

  In addition, by providing a turbulent flow promoting material, an internally grooved tube, and a vacuum heat insulating material, the amount of heat exchange can be increased as in the first embodiment.

(Embodiment 3)
FIG. 7 is a cross-sectional view of a main part of a heat exchanger according to Embodiment 3 of the present invention.

  In FIG. 7, the heat exchanger 1c is composed of a plurality of tubes 7c through which carbon dioxide flows and a flat tube 4c through which water flows and has a flat cross-sectional shape. The flat portion of the flat tube 4c includes When the tube 7c is sandwiched between the flat tubes 4c, unevenness is provided so that the entire circumference of the tube 7c is in close contact with the flat tube 4c. Since the flat tube 4c is thin and uniform, water flows through the unevenness. Also formed on the inner surface.

  The operation of the heat exchanger configured as described above will be described below.

  High-temperature pressurized carbon dioxide circulates in the tube 7c, and the high-temperature carbon dioxide flows through the tube 7c, whereby the tube 7c is heated. The heat transmitted to the tube 7c is transmitted to the flat tube 4c that is in contact with the entire circumference of the tube 7c, and the flat tube 4c is heated. Low-temperature water circulates in the flat tube 4c while the flow is disturbed by the irregularities on the inner surface, and the water circulating in the flat tube 4c is heated by heating the flat tube 4c.

  In the present invention, the fluid A is carbon dioxide and the fluid B is water, but the fluids A and B are not limited to this.

  As described above, the heat exchanger according to the third embodiment is such that the entire circumference of the plurality of tubes 7c through which the fluid A flows is sandwiched between the flat tubes 4, and at the same time the entire surface of the tubes 7c is in contact with the flat tubes 4c. Since the fluid B is disturbed by the irregularities on the inner surface of the flat tube 4c, heat conduction from the tube 7c to the flat tube 4c increases, heat transfer from the flat tube 4c to the fluid B is promoted, and the amount of heat exchange increases. .

  In addition, the heat exchange amount can be increased similarly to the first embodiment by providing the inner grooved tube and the vacuum heat insulating material.

(Embodiment 4)
FIG. 8 is a perspective view of a heat exchanger according to Embodiment 4 of the present invention.

  In FIG. 8, the heat exchanger 1 d is a meander composed of a plurality of third tubes 8 through which carbon dioxide flows and a restraining member 9 made of a heat conductive material such as aluminum that restrains the third tubes 8. The fourth tube 10 having a shape and a flat tube 4d having a flat and meandering cross section through which water flows, and the fourth tube 10 is parallel to the flat portion of the flat tube 4d. 10 are overlapped and joined.

  The operation of the heat exchanger configured as described above will be described below.

  High temperature pressurized carbon dioxide circulates in the plurality of third tubes 8 arranged in the fourth tube 10, and when the high temperature carbon dioxide flows through the third tube 8, Heat is transmitted from the tube 8 to the restraining member 9 made of a good heat conductive material such as aluminum, and the restraining member 9 is heated. The heat of the heated restraining member 9 is transmitted to the flat portion of the flat tube 4d that is in contact with the flat tube 4d, and heats the flat tube 4d. Low-temperature water flows through the flat tube 4d, and the water is heated by heating the flat tube 4d. Here, a plurality of fourth tubes 10 and flat tubes 4d can be stacked to increase the heat transfer area. In addition, since the third tube 8 and the restraining member 9 have different configurations, the restraining member 9 is made of, for example, copper that can easily form the third tube 8 in a grooved shape, such as aluminum having good thermal conductivity, or the like. And the third tube 8 can be made of different materials.

  In the present invention, the fluid A is carbon dioxide and the fluid B is water, but the fluids A and B are not limited to this. Further, although the good heat conductive material is aluminum or the like, it is not limited to this.

  As described above, the heat exchanger according to Embodiment 2 includes the fourth pipe 10 including the plurality of third pipes 8 through which the fluid A flows and the restraining member 9 that restrains the third pipe 8, and the fluid B 4d, and the fourth tube 10 and the flat tube 4d are overlapped so that the fourth tube 10 and the flat tube 4d are parallel to each other. The fourth tube 10 and the flat tube 4d Since the contact area increases, the amount of heat exchange can be increased. Further, the restraint member 9 and the third tube 8 are formed such that the third tube 8 is easily formed into a grooved shape, such as copper having good heat conductivity, and the restraint member 9 is light and heat conductive aluminum. Can be made of a different material, the fourth tube 10 can be made thinner and lighter than aluminum alone.

  In the heat exchanger of the present embodiment, the restraining member 9 is made of a highly heat conductive material, and the heat conductivity of the third tube 8 and the flat tube 4d is improved. The amount of heat exchange can be increased.

  In addition, by providing a turbulent flow promoting material, an internally grooved tube, and a vacuum heat insulating material, the amount of heat exchange can be increased as in the first embodiment.

  As described above, the heat exchanger according to the present invention makes it possible to reduce the volume of the heat exchanger by reducing the unnecessary space per unit volume. It can also be applied to.

Sectional drawing of the principal part of the heat exchanger by Embodiment 1 of this invention Cross-sectional perspective view of the heat exchanger of the same embodiment Sectional drawing of the principal part of the heat exchanger which provided the turbulent flow promotion material in FIG. 1 of the embodiment Sectional drawing of the principal part of the heat exchanger which provided the vacuum heat insulating material in FIG. 1 of the embodiment Sectional drawing of the principal part of the heat exchanger of the other Example of the same embodiment The perspective view of the heat exchanger by Embodiment 2 of this invention Sectional drawing of the principal part of the heat exchanger by Embodiment 3 of this invention The perspective view of the heat exchanger by Embodiment 4 of this invention Schematic configuration diagram of a conventional heat exchanger

Explanation of symbols

1a, 1b, 1c, 1d Heat exchanger 3a, 3b Multi-hole tube 4a, 4b, 4c, 4d Flat tube 5 Turbulence promoting material 6 Vacuum heat insulating material 7a, 7c Tube 8 Third tube 9 Constraining member 10 Fourth tube

Claims (10)

A heat exchanger having a first pipe through which the fluid A flows and a second pipe having a flat cross section through which the fluid B flows, and the first pipe and the second pipe are stacked so as to be orthogonal to each other. . The heat exchanger according to claim 1, wherein the first pipe and the second pipe are arranged so as to be alternately stacked in multiple layers. The heat exchanger according to claim 1, wherein the meandering first tube and the second tube are arranged to overlap each other. The heat exchanger according to any one of claims 1 to 3, wherein the entire circumference of the first pipe composed of a plurality of pipes through which the fluid A flows is sandwiched between the second pipes. A fourth pipe comprising a plurality of third pipes through which the fluid A circulates and a restraining member that restrains the third pipe; and a second pipe through which the fluid B circulates. A heat exchanger in which the fourth tube and the second tube are overlapped so that the tubes are parallel to each other. The heat exchanger according to claim 5, wherein the restraining member is made of a highly heat conductive material. The heat exchanger according to any one of claims 1 to 6, wherein a turbulence promoting material is provided in the second pipe. The heat exchanger according to any one of claims 1 to 7, wherein the first tube or the third tube is an internally grooved tube. The heat exchanger as described in any one of Claim 1 to 8 which used the heat insulating material which covers a heat exchanger outer periphery as a vacuum heat insulating material. The heat exchanger according to any one of claims 1 to 9, wherein the fluid A is carbon dioxide and the fluid B is water.

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