JP5548941B2 - Heat storage device and air conditioner equipped with the same - Google Patents

Description

  The present invention relates to a heat storage device that stores heat released from a compressor of an air conditioner, and an air conditioner including the heat storage device.

  The following are known heat storage devices that store heat radiated from the compressor of this type of conventional air conditioner. Such a heat storage device is provided with a metal container that is in contact with at least a part of the outer peripheral surface of the compressor, and a gap between the compressor and the metal container is filled with a silicon-based resin. Is filled with a heat storage material, and a heat insulating material is disposed on at least a part of the outer surface of the metal container that is not in contact with the compressor (for example, Patent Document 1).

Japanese Patent Laid-Open No. 1-8376

  However, in the above technique, since the filler is filled in the gap between the metal container and the compressor, the work efficiency of the process of attaching the heat storage device to the compressor is poor.

  Further, since the silicon-based filler is filled in the gaps, it is difficult to make the shape in contact with the entire outer peripheral surface of the compressor, the manufacturing variation is large, and the adhesion is low.

  Therefore, an object of the present invention is to provide a heat storage device that can be easily mounted, has less manufacturing variation, and provides high adhesion.

In order to solve the above-mentioned conventional problems, the heat storage device of the present invention is constituted by a material that shrinks at least the surface in contact with the compressor of a cylindrical container that is fitted into the outer peripheral surface of the compressor , It is characterized by being in close contact with the outer peripheral surface of the compressor by heat from the compressor, and when the compressor is operated with the heat storage device mounted on the compressor, the heat dissipation due to the temperature rise of the compressor is reduced. The heat-shrinkable material constituting the contact surface with the compressor receives and contracts, and the surface of the heat storage device that contacts the compressor is pressed against and closely contacts the compressor. As a result, the heat storage device of the present invention can be easily attached to the compressor, and there is little manufacturing variation and high adhesion can be obtained.

  The heat storage device of the present invention can be easily attached to a compressor, and there is little manufacturing variation and high adhesion can be obtained.

The perspective view of the thermal storage apparatus in the 1st Embodiment of this invention Vertical sectional view of the heat storage device in the first embodiment of the present invention Horizontal sectional view of the heat storage device in the first embodiment of the present invention The perspective view of the thermal storage apparatus in the 2nd Embodiment of this invention. Horizontal sectional view of the heat storage device in the second embodiment of the present invention shown in FIG. Horizontal sectional view of the heat storage device in the third embodiment of the present invention The disassembled perspective view which shows the positional relationship of the container body 21 and the heat-transfer member 22 of the 3rd Embodiment of this invention.

1st invention comprises the cylindrical container made into the shape fitted to the outer peripheral surface of a compressor with the material which shrinks at least the surface which touches a compressor with heat , and the outer peripheral surface of a compressor with the heat from a compressor The surface that contacts the compressor is made of a material that shrinks by heat, improving the adhesion with the compressor and efficiently releasing the heat released from the compressor. Can absorb and store heat.

According to a second aspect of the present invention, at least the surface in contact with the compressor of the container shaped to embrace 180 ° or more of the outer peripheral surface of the compressor is made of a material that shrinks by heat, and the outer periphery of the compressor by heat from the compressor By employing a heat storage device characterized by being in close contact with the surface, the degree of freedom in design can be further improved while efficiently absorbing the heat released from the compressor.

  According to a third aspect of the present invention, there is provided a heat storage device characterized in that the material that shrinks by heat is a material obtained by radiation-crosslinking polyolefin, a fluorine-based polymer, or an elastomer material to impart heat shrinkage characteristics. It can be efficiently attached to the compressor, and work efficiency when removing from the compressor can be improved.

  A fourth aspect of the invention is an air conditioner including the above-described heat storage device, which has a high heating capacity, and a time until the compressor starts operation again when heating is resumed is shortened. An air conditioner can be obtained.

  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)
FIG. 1 is a perspective view of a heat storage device according to the first embodiment of the present invention. In the present embodiment, a conventionally known cylindrical one can be used as the compressor 1. A cylindrical heat storage device 2 is attached to the compressor 1 so as to surround it. From the viewpoint of increasing the installation area efficiency, the compressor 1 and the heat storage device 2 are installed such that the longitudinal direction is vertical. The inner peripheral surface of the heat storage device 2 is in close contact with the outer peripheral surface of the compressor 1. The compressor 1 generates heat during operation. Heat from the compressor 1 propagates to the heat storage device 2. The heat storage device 2 absorbs the propagated heat and stores the heat.

  The compressor 1 includes a suction pipe and a discharge pipe (not shown), sucks refrigerant from the suction pipe, compresses the refrigerant to a predetermined pressure, and discharges the compressed refrigerant from the discharge pipe. In the compressor 1, the temperature rises in the process of compressing the refrigerant, and heat is released to the surroundings.

  In order to improve the heating capacity of the compressor 1, the temperature of the refrigerant is preferably high. Further, the temperature of the compressor 1 needs to be within a predetermined range for operation, but if the operation of the compressor 1 is stopped and left to stand, the temperature of the compressor 1 is necessary to perform the function. When it is lowered to the following and is operated again, it takes time until the temperature of the compressor 1 is increased again to a temperature at which the compressor 1 can be operated.

  In order to improve the heating capacity and shorten the time until the operation is restarted after the operation is stopped, the heat released from the compressor 1 is stored in the heat storage device 2 so that the temperature drop of the compressor 1 is moderated. Therefore, the heat dissipation from the compressor 1 is absorbed and stored by the heat storage device 2.

  In addition to the above embodiment, a part of the refrigerant circuit is passed through the heat storage device 2 as an endothermic heat exchanger (not shown) to exchange heat with the heat storage material 23, so that the inside of the heat storage device 2. Heat can also be used during defrosting.

  2 is a vertical cross-sectional view of the heat storage device 2 shown in FIG. 1, and FIG. 3 is a horizontal cross-sectional view of the heat storage device 2 shown in FIG.

  The heat storage device 2 includes a container body 21 and a heat insulating material 24.

  Here, the container body 21 is a bottomed double cylindrical body that houses the heat storage material 23. It consists of an inner cylinder 21a, an outer cylinder 21b, and a bottom 21c.

  The inner cylinder 21 a surrounds and is in close contact with the outer peripheral surface of the compressor 1. Most of the heat released from the outer peripheral surface of the compressor 1 propagates to the inner cylinder 21a. The inner cylinder 21 a propagates the heat propagated from the compressor 1 to the heat storage material 23. The heat storage material 23 stores the transmitted heat.

  It is important that the inner cylinder 21a is made of a material that contracts by heat. As this heat shrinkable material, for example, a material obtained by radiation-crosslinking polyolefin, a fluorine-based polymer, or an elastomer material and imparting heat shrinkage properties can be used.

  The inner cylinder 21a may be formed by rounding a sheet-like heat-shrinkable material into a cylindrical shape and then air-tightening by post-processing to eliminate the joints of the connecting portions. Further, an uncured heat-shrinkable material formed into a cylindrical shape and solidified may be used.

  As described above, the heat radiation from the compressor 1 is transmitted to the inner cylinder 21a and is partially absorbed by the inner cylinder 21a. The inner cylinder 21 a contracts due to heat from the compressor 1. The inner cylinder 21a is contracted by heat radiation from the compressor 1, and the inner cylinder 21a is fitted with the compressor 1 by a force that contracts itself. The inner cylinder 21 a is pressed against the outer peripheral surface of the compressor 1 by the contracting force. And the adhesiveness of the outer peripheral surface of the compressor 1 and the inner peripheral surface of the inner cylinder 21a improves.

  Moreover, the heat conductivity improves as the adhesion improves. Moreover, since the inner cylinder 21a receives heat and contracts, the degree of adhesion with the outer peripheral surface of the compressor 1 is further increased, and the heat radiation from the compressor 1 can be received with high efficiency. It receives heat from the heat and further shrinks to improve the adhesion to the compressor 1.

  The heat storage material 23 is accommodated in a space surrounded by the inner cylinder 21a, the outer cylinder 21b, and the bottom 21c. As the heat storage material 23, a conventionally known material can be used. For example, water, oil, glycol, or other liquid material is used as the heat storage material 23 using sensible heat, and paraffin or the like is used as the heat storage material 23 using latent heat associated with a change in the state of the liquid and solid. it can.

  The outer cylinder 21b has a cylindrical shape.

  The outer cylinder 21b is preferably made of a member that does not easily expand or contract due to heat.

  As the material of the outer cylinder 21b, it is possible to use a material that thermally contracts in the same manner as the inner cylinder 21a, but it is preferable to use a material that does not thermally contract.

  Since the change of the outer diameter of the outer cylinder 21b is prevented, even if the fixing part such as a screw hole is formed in the outer cylinder 21b of the container body 21 for positioning the heat storage device 2, Since the position of the part does not change, the position of the fixing jig does not change.

  For this reason, the heat storage device 2 can be easily and easily supported and fixed to an outdoor unit or the like using a fixing jig or the like.

  A heat insulating material 24 is attached to the outer peripheral surface of the outer cylinder 21b. For the heat insulating material 24, materials having various heat insulating properties such as foamed polystyrene, foamed urethane, and felt can be used. The heat insulating material 24 prevents heat exchange between the outside air and the container body 21, and suppresses heat radiation of the heat storage material 23.

  Next, attachment of the heat storage device 2 to the compressor 1 will be described. First, the heat storage device 2 is positioned above the compressor 1. Next, the heat storage device 2 is lowered so as to surround the compressor 1. The outer peripheral surface of the compressor 1 and the inner peripheral surface of the heat storage device 2 are brought into contact with each other. Thereafter, when the compressor 1 is operated, the heat generated by the compressor 1 is transmitted to the inner cylinder 21 a, the inner cylinder 21 a contracts, and the outer peripheral surface of the compressor 1 is pressed to contact the inner cylinder 21 a with the compressor 1. Adheres to the outer surface. At this time, the inner cylinder 21 a engages the compressor 1. As described above, the heat storage device 2 can be attached to the compressor 1 with high adhesion.

  The present invention is not limited to the above-described embodiments, and can be various embodiments.

  FIG. 4 is a perspective view of the heat storage device in the second embodiment, and FIG. 5 is a horizontal sectional view of the heat storage device in the second embodiment.

  As shown in FIGS. 4 and 5, in the second embodiment, the cylindrical heat storage device 2 of the first embodiment is a horseshoe shape. That is, instead of the cylindrical heat storage material 23, the inner cylinder 21a, the outer cylinder 21b, and the heat insulating material 24, a horseshoe-shaped heat storage material 23, a horseshoe-shaped outer wall 25, and a horseshoe-shaped heat insulating material 24 can be used, respectively. . Here, the overall shape of the heat storage device 2 is a horseshoe shape. The contact surface where the heat storage device 2 is in contact with the compressor 1 is connected to the curved wall portion 21aa where the curvature of the compressor 1 is substantially the same, and to the end of the base portion. The distance between the pair of side wall portions (that is, the opening width) is substantially constant, or increases toward the opposite side (that is, the front end side) of the curved wall portion 21aa. This means that the entire shape connecting the curved wall portion 21aa and the straight wall portion 21ab is substantially U-shaped. Here, a material that shrinks by heat is used for the curved wall portion 21aa.

  In other words, the horseshoe shape is a shape that allows the heat storage device 2 to be fitted to the compressor 1 from the side.

  In this case, the curved wall portion 21aa needs to cover at least half of the outer peripheral surface when the compressor 1 is viewed in a horizontal cross section. The reason is that the curved wall 21aa cannot press the outer peripheral surface of the compressor 1 when more than half of the outer peripheral surface is not covered when the compressor 1 is viewed in a horizontal cross section when the compressor 1 is contracted by heat. is there.

  Thereby, when mounting the heat storage apparatus 2 in the compressor 1, not only it fits from the upper direction of the compressor 1, but the heat storage apparatus 2 can be pressed and installed from the side surface of the compressor 1. Thereafter, when the compressor 1 is operated, the heat generated by the compressor 1 is transmitted to the curved wall portion 21aa made of a material that thermally contracts, the curved wall portion 21aa contracts, and the outer peripheral surface of the compressor 1 is pressed and contacted. The curved wall portion 21aa is in close contact with the outer peripheral surface of the compressor 1. Thus, since the compressor 1 and the heat storage device 2 can be integrally coupled, the attachment can be performed more easily and easily.

  FIG. 6 is a horizontal cross-sectional view of the heat storage device in the third embodiment of the present invention, and FIG. 7 is an exploded perspective view showing the positional relationship between the container body 21 and the heat transfer member 22 in the third embodiment of the present invention. FIG. The outer cylinder 21b is seen through so that the shape of the inner cylinder 21a can be easily understood.

  In the third embodiment, the heat transfer member 22 needs to be heat-shrinkable. In that case, the inner cylinder 21a may be made of a material that does not have heat-shrinkability.

  As shown in FIGS. 6 and 7, the container body 21 in the third embodiment is provided with an opening 21 d that communicates from the inner peripheral surface of the inner cylinder 21 a to the outer peripheral surface. The heat transfer member 22 is fitted in the inner cylinder 21a. The heat transfer member 22 contracted by heat enters the opening 21d from the outer peripheral direction toward the inner peripheral direction, that is, toward the compressor 1. Further, the heat transfer member 22 penetrates through the opening 21d and is in close contact with the shape following the surface shape of the compressor 1.

  Next, attachment of the heat storage device 2 to the compressor 1 according to the third embodiment will be described. The container body 21 is positioned above the compressor 1. The compressor 1 and the container body 21 are brought into a state close to the same axis. The container body 21 is lowered so that the compressor 1 can be surrounded. The inner cylinder 21 a is arranged so as to surround the compressor 1. Further, the heat transfer member 22 is disposed so as to surround the inner cylinder 21 a of the container body 21. Then, the compressor 1 is operated. The heat generated by the compressor 1 is transmitted to the heat transfer member 22 of the heat storage device 2 and the heat transfer member 22 contracts, whereby the heat transfer member 22 closes the opening 21d and adheres closely to the outer peripheral surface of the compressor 1. Fit the compressor 1. Further, the heat storage material 23 is filled in a space surrounded by the outer cylinder 21 b and the bottom 21 c of the container body 21 and the heat transfer member 22. As described above, the heat storage device 2 can be attached to the compressor 1 with high adhesion.

  All the embodiments described above can be modified as appropriate without departing from the scope of the present invention.

  In addition, by installing the heat storage device 2 of the present invention in the compressor 1 of the air conditioner, the air conditioner has high heating capacity and shortens the time until the compressor 1 starts operating when heating is resumed. Can be obtained.

  Further, by passing a part of the refrigerant circuit through the heat storage device 2 as an endothermic heat exchanger (not shown) and exchanging heat with the heat storage material 23, the heat in the heat storage device 2 can be used during defrosting. It is possible to shorten the defrosting time and continue the heating operation during the defrosting operation.

DESCRIPTION OF SYMBOLS 1 Compressor 2 Heat storage apparatus 21 Container body 21a Inner cylinder 21b of container body 21 Outer cylinder 21c of container body 21 Bottom 21d of container body 21 Opening part 22 of container body 21 Heat transfer member 23 Heat storage material 24 Heat insulation material

Claims (4)

A heat storage device in which at least a surface in contact with a compressor of a cylindrical container fitted into the outer peripheral surface of the compressor is made of a material that shrinks by heat, and is in close contact with the outer peripheral surface of the compressor by heat from the compressor . A heat storage device in which at least the surface in contact with the compressor is made of a material that shrinks by heat, and is in close contact with the outer peripheral surface of the compressor by the heat from the compressor. . The heat storage device according to claim 1, wherein the material that shrinks by heat is a material obtained by subjecting a polyolefin, a fluorine-based polymer, or an elastomer material to radiation crosslinking to impart heat shrinkage characteristics. An air conditioner comprising the heat storage device according to any one of claims 1 to 3.

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