JP2016095131A - Manufacturing method of heat storage device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method of a heat storage device capable of efficiently storing waste heat from a compressor to a heat storage device, and capable of efficiently performing defrosting operation during heating operation.SOLUTION: A heat storage device 18 includes a heat storage body 19 arranged so as to surround a substantially cylindrical compressor, and a heat storage heat exchanger 20 at least a part of which is buried in the heat storage body 19. The heat storage body 19 has at least two open holes, and the heat storage heat exchanger 20 has one or more U-shaped heat transfer pipes. The heat storage device 18 is manufactured so that the heat transfer pipe of the heat storage heat exchanger 20 is inserted into the open holes of the heat storage body 19, is expanded, and adheres to the heat storage body 19.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a method for manufacturing a heat storage device having a heat storage body that is arranged so as to surround a compressor and accumulates heat generated in the compressor in a metal.

  Conventionally, when the outdoor heat exchanger is frosted during the heating operation by the heat pump air conditioner, defrosting is performed by switching the four-way valve from the heating cycle to the cooling cycle. In this defrosting method, although the indoor fan is stopped, there is a disadvantage that a feeling of heating is lost because cold air is gradually discharged from the indoor unit.

  Accordingly, a heat storage device is provided in the compressor provided in the outdoor unit, and the one that is defrosted using the waste heat of the compressor stored in the heat storage tank during the heating operation has been proposed (for example, Patent Document 1).

  FIG. 7 is a cross-sectional view showing a conventional heat storage device. In FIG. 7, the heat storage device 100 is fixed to the outer peripheral surface of the compressor 101, and includes a heat storage tank 102, a heat storage body 103, and a heat exchanger 104. The heat transfer surface 105 on the inner periphery of the heat storage tank 102 is disposed so as to contact the outer peripheral surface of the compressor 101, thereby storing waste heat of the compressor 101 in the heat storage tank 102.

JP-A-3-31666

  However, the conventional heat storage device has a problem that the waste heat of the compressor cannot be efficiently stored in the heat storage tank.

  This invention solves the said conventional subject, and it aims at providing the manufacturing method of the thermal storage apparatus which can thermally store the waste heat of a compressor in a thermal storage tank efficiently.

  In order to solve the conventional problem, the present invention includes a heat storage body disposed so as to surround a substantially cylindrical compressor, and a heat storage heat exchanger at least partially embedded in the heat storage body, and the heat storage The body has at least two or more through holes, and the heat storage heat exchanger is a method for manufacturing a heat storage device having one or more U-shaped heat transfer tubes, and the heat transfer tubes are inserted into the through holes. It is a manufacturing method of the thermal storage apparatus which expands and makes it stick to the said thermal storage body.

  Thereby, the manufacturing method of the thermal storage apparatus which can carry out the heat transfer of the waste heat from a compressor efficiently to a thermal storage body, and can store it can be provided.

  INDUSTRIAL APPLICABILITY The present invention can provide a method for manufacturing a heat storage device that can efficiently store waste heat from a compressor in a heat storage device and can efficiently perform a defrosting operation during heating operation.

The block diagram of the refrigerating cycle of the air conditioner in Embodiment 1 of this invention Perspective view of the compressor and heat storage device External perspective view of the heat storage device Longitudinal sectional view along XX in FIG. Cross-sectional view along YY in FIG. (A) Appearance perspective view of heat transfer sheet provided with the same number of small diameter holes, (b) Appearance perspective view of heat transfer sheet provided with the same number of vertical and horizontal slits Cross-sectional view showing a conventional heat storage device

  1st invention is equipped with the thermal storage body arrange | positioned so that a substantially cylindrical compressor may be enclosed, and the thermal storage heat exchanger with which at least one part is embed | buried in the said thermal storage body, The said thermal storage body penetrates at least 2 or more The heat storage heat exchanger is a method of manufacturing a heat storage device having one or more U-shaped heat transfer tubes, the heat transfer tubes are inserted into the through holes, expanded, and the heat storage body It is the manufacturing method of the thermal storage apparatus closely_contact | adhered to.

  In a second aspect of the invention, particularly in the first aspect of the invention, the heat storage body is made by extrusion molding of aluminum.

  In a third aspect of the invention, particularly in the first or second aspect of the invention, the heat storage body is divided and arranged around the compressor.

  In a fourth aspect of the invention, in particular, in any one of the first to third aspects of the invention, the heat storage body is fixed to the compressor by a band.

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

(Embodiment 1)
1 is a configuration diagram of a refrigeration cycle of an air conditioner according to Embodiment 1. FIG.

  The air conditioner in the present embodiment is configured by connecting an indoor unit 1 installed indoors and an outdoor unit 2 installed outdoor using a refrigerant pipe 3.

  The indoor unit 1 includes an indoor heat exchanger 5 that exchanges heat between indoor air and a refrigerant, and an indoor fan 6 that promotes heat exchange in the indoor heat exchanger 5 and blows air into the room. Moreover, the temperature sensor 7 which is an indoor temperature detection means which detects indoor temperature, and the temperature sensor 8 which is an indoor heat exchanger temperature detection means which detects the temperature of an indoor heat exchanger are provided.

  The outdoor unit 2 includes an outdoor heat exchanger 9 that exchanges heat between the outdoor air and the refrigerant, an outdoor fan 10 that promotes heat exchange in the outdoor heat exchanger 9 and blows air, and compresses the refrigerant and discharges high-temperature refrigerant. A compressor 11 that performs switching, a four-way valve 12 that switches the flow path of the refrigerant, a decompression device 13 that decompresses the refrigerant, and a temperature sensor 14 that is an outdoor heat exchanger temperature detection unit that detects the temperature of the outdoor heat exchanger; And a temperature sensor 15 which is an outside air temperature detecting means for detecting the temperature of the outside air.

  During the cooling operation, the refrigerant flows in the order of the compressor 11, the four-way valve 12, the outdoor heat exchanger 9, the decompression device 13, the indoor heat exchanger 5, the four-way valve 12, and the compressor 11. In the heating operation, the compressor 11 The refrigeration cycle is configured such that the refrigerant flows in the order of the four-way valve 12, the indoor heat exchanger 5, the decompression device 13, the outdoor heat exchanger 9, the four-way valve 12, and the compressor 11.

In addition, a remote control device (not shown) that gives an operation instruction to the indoor unit 1 is provided. The remote control device can set an instruction for cooling operation or heating operation, and set a room temperature. Air conditioning operation is performed so that the temperature is reached.

  Further, a heat storage device 18 is disposed around the compressor 11, and includes a heat storage body 19 formed of a metal material aluminum and a heat storage heat exchanger 20 that receives heat from the heat storage body 19. The heat flowing between the refrigerant flowing in the refrigerant pipe provided inside and the heat storage body 19 performs heat exchange.

  Further, a defrosting bypass circuit 21 for connecting the discharge pipe of the compressor 11 and the pressure reducing device 13 and the outdoor heat exchanger 9 is provided, and the defrosting bypass circuit 21 has a two-way valve 22 for defrosting. Is provided. Then, the refrigerant is caused to flow through the defrosting bypass circuit 21 by opening and closing the defrosting two-way valve 22.

  In the air conditioner configured as described above, the defrosting operation will be described.

  First, when the temperature of the outdoor heat exchanger detected by the temperature sensor 14 detects a temperature that is a defrosting operation start condition, the defrosting operation is started. In addition, the conditions for starting the defrosting operation are not limited to this. For example, it may be possible to add conditions such as when the outside air temperature or a time lower than the temperature of the defrosting operation starting condition continues for a predetermined time. . Moreover, the temperature detection of the outdoor heat exchanger 9 may be substituted by detecting the temperature of the refrigerant pipe of the outdoor heat exchanger 9.

  When the defrosting operation is started, the heating operation is continued by opening the defrosting two-way valve 22 and the bypass two-way valve 17 and controlling the decompression device 13 to an appropriate opening degree. The defrosting operation can be carried out.

  Such a defrosting operation while continuing the heating operation is performed for the first time when both the defrosting two-way valve 22 and the bypass two-way valve 17 are open. If the opening control is performed prior to the defrosting two-way valve 22, the amount of heat accumulated in the heat accumulator 19 is wasted, and both the defrosting two-way valve 22 and the bypass two-way valve 17 are simultaneously used. When the opening control is performed, the refrigerant from the outdoor heat exchanger 9 and the refrigerant from the indoor heat exchanger 5 are simultaneously sucked into the compressor 11, which may cause pressure fluctuations. By setting an appropriate time difference between the opening control of the valve 22 and the opening control of the bypass two-way valve 17, pressure fluctuation can be suppressed as much as possible, and the inflow of liquid refrigerant to the compressor 11 can be prevented to reduce the compressor. 11 reliability can be improved. Therefore, in this embodiment, the defrosting two-way valve 22 is opened before the bypass two-way valve 17.

  Next, the configuration of the heat storage device 18 will be described. FIG. 2 is a perspective view of the compressor 11 and the heat storage device 18 in the present embodiment. As shown in FIG. 2, the heat storage device 18 is arranged around the compressor 11, and includes a heat storage body 19 and a heat storage heat exchanger 20.

  A refrigerant flows inside the heat storage heat exchanger 20, and heat radiated from the compressor 11 is stored in the heat storage body 19. The heat storage body 19 is made by extrusion molding of aluminum, and by using aluminum, the thermal conductivity is high and the cost is reduced.

  Further, the heat accumulator 19 is tightly fixed by being in close contact with the compressor 11 from the lateral direction and fastened to the accumulator 26 and the compressor 11 by bands 52a and 52b, respectively.

FIG. 3 is an external perspective view of the heat storage device 18 in the present embodiment. As shown in FIG. 3, the heat storage heat exchanger 20 in which the refrigerant flows is composed of a U-shaped U-shaped tube 20a and a straight straight tube 20b. And the edge part of adjacent straight pipe 20b is connected by the U-shaped pipe 20a, and the refrigerant | coolant flow path is connected. The heat storage body 19 has an outer wall 19 a and an inner wall 19 b, and the inner wall 19 b becomes a heat transfer surface and is in close contact with the outer peripheral surface of the compressor 11.

  4 is a longitudinal sectional view taken along the line XX in FIG. 2 in the present embodiment, and FIG. 5 is a transverse sectional view taken along the line YY in FIG. 2 in the present embodiment.

  Since the outer peripheral surface of the compressor 11 and the inner wall (heat transfer surface) 19b of the heat storage body 19 are in close contact with each other, a gap is inevitably generated when they are joined. When a gap is generated, an air layer is interposed, so that an air layer with high heat insulation reduces heat conduction performance. In order to prevent the deterioration of the heat conduction performance, a heat transfer sheet 60 having a buffer property and also having heat conductivity is provided on the outer peripheral surface of the compressor 11 and the inner wall of the heat accumulator 19 (see FIG. 5). It arrange | positions between 19b of heat surfaces, and it is comprised so that an air layer may not be interposed between the compressor 11 and the thermal storage body 19. FIG. The heat transfer sheet 60 is made of a material (for example, a silicon sheet) that takes into account heat resistance in addition to buffering properties and heat conduction performance.

  6A is an external perspective view of the heat transfer sheet 60 provided with innumerable small-diameter holes in the present embodiment, and FIG. 6B is a heat transfer sheet 60 provided with innumerable vertical and horizontal slits in the present embodiment. FIG.

  As shown in FIG. 6A, the heat transfer sheet 60 has an infinite number of small-diameter through holes 61 on the entire surface, or an infinite number of vertical or horizontal or vertical and horizontal directions as shown in FIG. 6A. By providing both slits 62, it is possible to prevent air bubbles from being generated between the metal surface and the heat transfer sheet 60 when the slit 62 is attached. Of course, it is possible to use the heat transfer sheet 60 in which the through hole 61 and the slit 62 are not provided.

  The inner wall (heat transfer surface) 19b has a shape in which a part of a cylinder having a predetermined diameter is cut out as a whole, and the compressor 11 and the heat transfer sheet 60 are accommodated inside the inner wall (heat transfer surface) 19b. Therefore, the inner diameter of the inner wall (heat transfer surface) 19b is set slightly larger than the outer diameter of the compressor 11 in consideration of the mounting tolerance, the thickness of the heat transfer sheet 60, and the like.

  Next, the operation of the heat storage device 18 configured as described above will be described.

  As described above, the heat storage device 18 stores heat generated in the compressor 11 during the heating operation in the heat storage body 19, and when the heat storage device 18 shifts from the normal heating operation to the defrosting / heating operation, the heat storage heat exchanger 20 The heat is acquired and used. Therefore, it is preferable that the heat transfer performance of the heat transfer path from the outer surface of the compressor 11 to the heat storage body 19 is better so that the temperature of the heat storage body 19 can be sufficiently raised earlier than frost grows during heating operation.

  The heat transfer performance of the heat transfer path from the outer surface of the compressor 11 to the heat storage body 19 depends on the degree of adhesion between the heat storage body 19 and the compressor 11 and the heat transfer performance of the heat transfer surface.

  Therefore, in the heat storage device 18 according to the present invention, the heat transfer sheet 60 is provided between the outer peripheral surface of the compressor 11 and the inner wall (heat transfer surface) 19b of the heat storage body 19 to prevent the air layer from interposing and compressing. By improving the adhesion between the outer peripheral surface of the machine 11 and the inner wall (heat transfer surface) 19b of the heat storage body 19 and making the heat transfer sheet 60 excellent in thermal conductivity and buffering properties, the heat storage body 19 The heat storage performance is improved.

The first aspect of the present embodiment is a heat storage body that is arranged so as to surround a substantially cylindrical compressor and stores heat generated by the compressor, and heat stored in the heat storage body that is stored. And a heat storage device provided with a heat transfer surface that efficiently obtains the heat generated in the compressor, the compressor and the heat transfer surface of the heat storage body, By using an air conditioner equipped with a heat storage device having a sheet material having thermal conductivity and cushioning between the compressor and a structure in which an air layer is not interposed between the compressor and the heat storage body. Highly heat-conductive between two hard surfaces, and a highly heat-insulating air layer can be eliminated via a cushioning sheet material, and waste heat from the compressor can be efficiently It can move and heat storage heat exchange from the heat storage body It is possible to provide an air conditioner using a heat storage device capable heat transfer even in a short time.

  In the second aspect, in particular, in the first aspect, the sheet material is provided with innumerable small-diameter holes, or innumerable vertical, horizontal, and vertical and horizontal slits. When this is applied to a metal surface, In addition, it is possible to prevent air bubbles from occurring between the metal surface and the sheet material.

  In the third aspect, particularly in the first or second aspect, the heat storage body has at least two through holes, and at least one or more U-shaped heat transfer tubes are inserted into the through holes from one side. And since each tube comprised the thermal storage heat exchanger which made it closely_contact | adhere to a thermal storage body, expanding from the opposite side after insertion, the adhesiveness of a thermal storage body and a thermal storage heat exchanger further improves.

  In the fourth aspect, particularly in any one of the first to third aspects, the heat storage body is divided and arranged around the compressor, so that complicated processing is not required and the number of assembling steps is reduced. be able to.

  In the fifth aspect, in particular, in any one of the first to fourth aspects, the total weight of the heat storage body is suppressed to less than half of the compressor, so that the performance of the original compressor is not degraded. Only the waste heat can be effectively stored in the heat storage body.

  The heat storage device according to the present invention includes a close contact member that is in close contact with the compressor, and can efficiently store heat generated in the compressor in the heat storage body. It can also be applied to applications.

11 compressor 18 heat storage device 19 heat storage body 19a outer wall 19b inner wall (heat transfer surface)
20 Heat storage heat exchanger 60 Heat transfer sheet 61 Through hole 62 Slit

Claims (4)

A heat storage body arranged so as to surround a substantially cylindrical compressor, and a heat storage heat exchanger at least partially embedded in the heat storage body, wherein the heat storage body has at least two or more through holes, A heat storage heat exchanger is a method of manufacturing a heat storage device having one or more U-shaped heat transfer tubes, wherein the heat transfer tube is inserted into the through hole, expanded, and closely attached to the heat storage device. Production method. The said heat storage body is a manufacturing method of the heat storage apparatus of Claim 1 made by the extrusion molding of aluminum. The method for manufacturing a heat storage device according to claim 1 or 2, wherein the heat storage body is divided and disposed around the compressor. The said heat storage body is a manufacturing method of the heat storage apparatus of any one of Claims 1-3 fixed to the said compressor with a band.