JP2013019651A - Heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat exchanger having a constitution which can be easily fabricated than heretofore.SOLUTION: The heat exchanger 2 is formed by stacking two heat exchanging modules 10, 50 up and down. The two heat exchanging modules 10, 50 are connected with a connection member 100. The heat exchanging module 10 includes a water pipe 20 for conducting water and a refrigerant pipe 30 for conducting refrigerant. The heat exchanging module 10 is configured so as to stack the water pipe 20 and the refrigerant pipe 30 up and down and is designed so as to spirally form the stacked water pipe 20 and refrigerant pipe 30 on a flat surface which are intersected almost orthogonally to stacked direction. The heat exchange module 50 also has a constitution similar to the heat exchange module 10.

Description

  The present invention relates to a heat exchanger.

  Patent Document 1 discloses a heat exchanger that performs heat exchange between water and a refrigerant. As shown in FIG. 4 of Patent Document 1, this heat exchanger has a spiral shape on substantially the same plane while alternately adhering first heat transfer tubes through which water flows and second heat transfer tubes through which refrigerant flows. It has a molded configuration.

JP 2004-218945 A

  In the heat exchanger of Patent Document 1 having the above-described configuration, of the two types of tubes, the first heat transfer tube and the second heat transfer tube, the tube on the outer side from the center of the spiral is more than the tube closer to the center. The circumference becomes longer. Therefore, when manufacturing the heat exchanger having the configuration of Patent Document 1, for example, the first heat transfer tube and the second heat transfer tube are arranged in advance and fixed in a straight line by soldering or the like. Even if the tubes are spirally formed on the same plane, it is difficult to manufacture a heat exchanger having the above-described configuration because an excessive force is applied to both the tubes.

  Further, for example, a method in which the first heat transfer tube and the second heat transfer tube are respectively formed in a spiral shape on the same plane in advance and combined so that the first heat transfer tube and the second heat transfer tube are alternately in close contact with each other is also considered. It is done. However, it is not easy to pre-form the first heat transfer tube and the second heat transfer tube into a spiral shape that can be accurately adhered to each other.

  The technology disclosed in this specification has been created to solve the above problems. In this specification, the heat exchanger which has the structure which can be manufactured more easily than before is provided.

  The heat exchanger disclosed in the present specification includes a heat exchange module including a water pipe through which water is conducted and a refrigerant pipe through which a refrigerant is conducted. In the heat exchange module, the water pipe and the refrigerant pipe are stacked one above the other, and the stacked water pipe and the refrigerant pipe are spirally formed on a plane substantially orthogonal to the stacking direction.

  Since said heat exchanger has said structure, the circumference of the water pipe laminated | stacked up and down and a refrigerant pipe does not differ. Therefore, the above heat exchanger is, for example, fixed to each other in a state where a linear water pipe and a refrigerant pipe are stacked in advance vertically, and the fixed water pipe and the refrigerant pipe are arranged on a plane substantially orthogonal to the stacking direction. It can be manufactured by bending into a spiral shape. Therefore, the above heat exchanger can be manufactured more easily than a conventional heat exchanger.

  The above heat exchanger has two or more heat exchange modules, the water tubes of each heat exchange module are connected to each other through a connection water tube, and the refrigerant tubes of each heat exchange module are connected to each other. The heat exchange modules are preferably stacked one above the other. According to this configuration, the entire heat exchanger can be formed more compactly than a configuration in which two or more heat exchange modules are installed side by side.

  The connecting water pipe and the connecting refrigerant pipe are preferably provided apart from each other, and the connecting refrigerant pipe is preferably provided with a temperature sensor. According to this configuration, the temperature sensor can detect the temperature of the refrigerant in the coupling refrigerant pipe without being affected by the temperature of the water in the coupling water pipe. Therefore, it is possible to accurately detect the temperature of the refrigerant.

  In the heat exchange module, the water pipe is preferably laminated on the refrigerant pipe. When the refrigerant circulating in the refrigerant pipe exchanges heat with the water in the water pipe, it condenses from the gas state into a liquid refrigerant condensate. Although this refrigerant condensate obstructs heat exchange between the refrigerant (gas state) and water, according to the above configuration in which the water pipe is stacked on the refrigerant pipe, the refrigerant condensate is placed under the refrigerant pipe by gravity. Accumulate to form a liquid film. Therefore, it is difficult for a liquid film to be formed at the junction (heat transfer section) between the refrigerant pipe and the water pipe. Thereby, it becomes difficult to be influenced by the heat transfer inhibition by the refrigerant condensate, and the efficiency of heat exchange is improved as compared with the configuration in which the refrigerant pipe is laminated on the water pipe.

The perspective view which shows the heat exchanger of an Example. The disassembled perspective view which shows the heat exchanger of an Example. The top view which shows the heat exchanger of an Example.

  A heat exchanger according to an embodiment of the present invention will be described with reference to the drawings. A heat exchanger 2 shown in FIG. 1 is a heat exchanger that performs heat exchange between water and a refrigerant, and is used, for example, in a heat pump hot water heater. The heat exchanger 2 is formed by stacking two heat exchange modules 10 and 50 on the top and bottom. The two heat exchange modules 10 and 50 stacked one above the other are connected by a connecting member 100. In this embodiment, the heat exchange module 10 is laminated on the upper side, and the heat exchange module 50 is laminated on the lower side.

  As shown in FIG. 2, the upper heat exchange module 10 includes a water pipe 20 through which water is conducted and a refrigerant pipe 30 through which a refrigerant is conducted. As the refrigerant, a gaseous refrigerant such as carbon dioxide or R410A can be used. The water pipe 20 is laminated on the refrigerant pipe 30. The water pipe 20 and the refrigerant pipe 30 are fixed to each other by brazing, soldering, or the like in a state where they are stacked one above the other. The water pipe 20 and the refrigerant pipe 30 are pipe-like members having substantially the same diameter and the same length. The water pipe 20 and the refrigerant pipe 30 are made of a metal having good thermal conductivity, such as copper, aluminum, or iron. The water pipe 20 and the refrigerant pipe 30 are preferably formed of the same material in order to prevent property changes at the contact portion.

  The water pipe 20 and the refrigerant pipe 30 stacked vertically are formed in a spiral shape on a plane substantially orthogonal to the stacking direction. As shown in FIG. 2, the end portions 22 and 32 near the outer periphery of the water tube 20 and the refrigerant tube 30 formed in a spiral shape are not stacked on each other but are spaced apart from each other in the vertical direction. Further, as shown in FIG. 3, the end portions 24 and 34 near the center of the water pipe 20 and the refrigerant pipe 30 formed in a spiral shape are not stacked on each other, and the end section 24 of the water pipe 20 is not connected to the refrigerant pipe 30. It is bent closer to the center than the end 34 of.

  The lower heat exchange module 50 also has the same configuration as the upper heat exchange module 10. That is, the heat exchange module 50 also includes a water pipe 60 and a refrigerant pipe 70. The water pipe 60 is laminated on the refrigerant pipe 70. The water pipe 60 and the refrigerant pipe 70 that are stacked one above the other are formed in a spiral shape on a plane that is substantially orthogonal to the stacking direction.

  As shown in FIG. 2, the ends 62 and 72 near the outer periphery of the water pipe 60 and the refrigerant pipe 70 are also not stacked on each other, and are spaced apart from each other in the vertical direction. Further, as shown in FIG. 3, the ends 64 and 74 near the center of the water pipe 60 and the refrigerant pipe 70 are not laminated with each other, and the end 64 of the water pipe 60 is more than the end 74 of the refrigerant pipe 70. It is bent toward the center.

  As shown in FIG. 3, the heat exchange modules 10 and 50 stacked one above the other are connected by a connecting member 100. The connecting member 100 includes a connecting water pipe 102 and a connecting refrigerant pipe 104. The connection water pipe 102 and the connection refrigerant pipe 104 are both pipe-shaped members formed in a substantially U shape. The connecting water pipe 102 and the connecting refrigerant pipe 104 are also formed of the same material as the water pipes 20, 60 and the refrigerant pipes 30, 70.

  The connecting water pipe 102 connects the end 24 of the water pipe 20 and the end 64 of the water pipe 60. On the other hand, the connecting refrigerant pipe 104 connects the end 34 of the refrigerant pipe 30 and the end 74 of the refrigerant pipe 70. The connecting water pipe 102 and the connecting refrigerant pipe 104 are provided apart from each other.

  The connecting refrigerant pipe 104 is provided with a temperature sensor 106. The temperature sensor 106 is a sensor for detecting the temperature of the refrigerant flowing in the connecting refrigerant pipe 104. Since the connecting water pipe 102 and the connecting refrigerant pipe 104 are separated from each other, the temperature sensor 106 can control the temperature of the refrigerant in the connecting refrigerant pipe 104 without being affected by the temperature of the water in the connecting water pipe 102. It can be detected accurately.

  The configuration of the heat exchanger 2 of the present embodiment has been described above. Then, the example in the case of performing heat exchange between water and a refrigerant | coolant using the heat exchanger 2 of a present Example is demonstrated. Specifically, an example in which low-temperature water is heated by heat exchange will be described. In this embodiment, the low temperature water is supplied from the end 62 of the water pipe 60 of the lower heat exchange module 50. The water supplied from the end 62 passes through the water pipe 60, the connecting water pipe 102, and the water pipe 20 in this order, and is discharged from the end 22. While passing through the water pipes 60 and 20, the water is heated by exchanging heat with the refrigerant in the refrigerant pipes 70 and 30 (receiving heat from the refrigerant). The water discharged from the end 22 is at a high temperature. On the other hand, the high-temperature and high-pressure gaseous refrigerant is supplied from the end portion 32 of the refrigerant pipe 30 of the upper heat exchange module 10. The refrigerant supplied from the end 32 exchanges heat with water flowing in the water pipe 20 and the water pipe 60 (passes heat to the water) while sequentially passing through the refrigerant pipe 30, the connecting refrigerant pipe 104, and the refrigerant pipe 70. . After the heat exchange, the refrigerant becomes liquid and flows under the refrigerant pipe 30, the connecting refrigerant pipe 104, and the refrigerant pipe 70. The refrigerant is discharged from the end portion 72. As described above, in this embodiment, water and refrigerant flow in opposite directions (counter flow). For this reason, the heat exchanger 2 of a present Example can perform heat exchange efficiently.

  The heat exchanger 2 of the present embodiment has been described in detail above. In the present embodiment, the heat exchange module 10 includes a water pipe 20 and a refrigerant pipe 30 that are stacked one above the other in a spiral shape on a plane that is substantially orthogonal to the stacking direction. Therefore, the circumferential lengths of the water pipe 20 and the refrigerant pipe 30 that are stacked one above the other are not different. Therefore, for example, the linear water pipe 20 and the refrigerant pipe 30 are fixed to each other in a state where they are laminated in advance, and the fixed water pipe 20 and the refrigerant pipe 30 are spirally formed on a plane substantially orthogonal to the lamination direction. The heat exchange module 10 can be manufactured by bending. The same applies to the heat exchange module 50. Therefore, the heat exchanger 2 of the present embodiment can be manufactured more easily than the conventional heat exchanger.

  Further, the heat exchanger 2 of the present embodiment can effectively use the space inside the water pipe 20 and the refrigerant pipe 30 as compared with the heat exchanger having a configuration in which the water pipe and the refrigerant pipe are formed in a coil shape. . As a result, the entire heat exchanger 2 can be compactly formed. Further, since there is almost no undulation in the height direction compared to the case where the water pipe and the refrigerant pipe are formed in a coil shape, the pressure loss of water and refrigerant flowing in the water pipe 20 and the refrigerant pipe 30 can be reduced. Moreover, draining the water pipe 20 is easy.

  The heat exchanger 2 of the present embodiment includes two heat exchange modules 10 and 50 that are stacked one above the other. Therefore, the entire heat exchanger 2 can be formed more compactly than a configuration in which two heat exchange modules are arranged side by side on the left and right. In addition, since two heat exchange modules are provided, it is possible to meet the demand for large capacity.

  In the present embodiment, since the connecting water pipe 102 and the connecting refrigerant pipe 104 are provided apart from each other, the temperature sensor 106 is connected without being affected by the temperature of the water in the connecting water pipe 102. The temperature of the refrigerant in the refrigerant pipe 104 can be detected. Therefore, it is possible to accurately detect the temperature of the refrigerant.

  In the heat exchange module 10 of the present embodiment, the water pipe 20 is laminated on the refrigerant pipe 30. When the refrigerant circulating in the refrigerant pipe 30 exchanges heat with the water in the water pipe 20, it condenses from the gas state and becomes a liquid refrigerant condensate. Although this refrigerant condensate obstructs heat exchange between the refrigerant (gas state) and water, according to the heat exchange module 10 of this embodiment in which the water pipe 20 is laminated on the refrigerant pipe 30, the refrigerant condensate Accumulates in the lower part of the refrigerant pipe 30 due to gravity to form a liquid film. Therefore, it is difficult for a liquid film to be formed at the joint portion (heat transfer portion) between the refrigerant tube 30 and the water tube 20. Thereby, it becomes difficult to be influenced by the heat transfer inhibition by the refrigerant condensate, and the efficiency of heat exchange is improved as compared with the configuration in which the refrigerant pipe is laminated on the water pipe.

  Specific examples of the present invention have been described in detail above, but these are merely examples and do not limit the scope of the claims. The technology described in the claims includes various modifications and changes of the specific examples illustrated above.

  In said Example, the heat exchanger 2 has the two heat exchange modules 10 and 50 laminated | stacked up and down. The heat exchanger 2 is not limited to this, and three or more heat exchange modules may be stacked one above the other. Also in that case, three or more heat exchange modules are stacked one above the other.

  The technical elements described in this specification or the drawings exhibit technical usefulness alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. In addition, the technology illustrated in the present specification or the drawings achieves a plurality of objects at the same time, and has technical utility by achieving one of the objects.

2 Heat exchanger 10 Heat exchange module 20 Water pipe 22 End of water pipe (outside)
24 Water pipe end (inside)
30 Refrigerant tube 32 End of refrigerant tube (outside)
34 End of refrigerant pipe (inside)
50 Heat exchange module 60 Water pipe 62 End of water pipe (outside)
64 Water pipe end (inside)
70 Refrigerant tube 72 End of refrigerant tube (outside)
74 End of refrigerant pipe (inside)
DESCRIPTION OF SYMBOLS 100 Connection member 102 Connection water pipe 104 Connection refrigerant pipe 106 Temperature sensor

Claims (4)

A heat exchanger,
A water pipe that conducts water,
A heat exchange module comprising a refrigerant pipe through which the refrigerant is conducted;
The heat exchange module
A water pipe and a refrigerant pipe are stacked one above the other,
A heat exchanger, wherein the water pipe and the refrigerant pipe that are stacked are formed in a spiral shape on a plane that is substantially orthogonal to the stacking direction. Have two or more heat exchange modules,
The water tubes of each heat exchange module are connected via a connecting water tube,
The heat exchanger according to claim 1, wherein the refrigerant tubes of the heat exchange modules are connected to each other through a connecting refrigerant tube, and the heat exchange modules are stacked one above the other. The connecting water pipe and the connecting refrigerant pipe are provided apart from each other,
The heat exchanger according to claim 2, wherein a temperature sensor is provided in the connecting refrigerant pipe. The heat exchange module
The heat exchanger according to any one of claims 1 to 3, wherein the water pipe is laminated on the refrigerant pipe.

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