JP2008057926A - Tank unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tank unit capable of obtaining sufficient heat retaining effect even on a part where a heat insulating material covering an outer side of a hot water storage tank is thinned. <P>SOLUTION: A rear face portion and both side portions are partially vertically cut corresponding to the hot water storage tank unit 12 having the rectangular shape in a cross-sectional plane view when observed from the entire foamed polystyrene heat insulating material covering the hot water storage tank 22. Sufficient heat retaining effect can not be obtained on the thinned part, and the heat of the hot water storage tank 22 radiates from the thinned part. Here, a recessed space is formed on inner face portions of the foamed polystyrene heat insulating materials 50, 51 from an end portion of one of the thinned side portion to an end portion of the other side portion of the foamed polystyrene heat insulating materials 50, 51 along the hot water storage tank 22, and a thin high-heat insulating material 53 is placed in the recessed space. Spacers 55 for forming air layers 54 are disposed between the thin high-heat insulating material 53 and the hot water storage tank 22 and/or between the thin high-heat insulating material 53 and the foamed polystyrene heat insulating materials 50, 51. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a tank unit provided in a unit main body by covering with a heat insulating material for keeping warm a hot water storage tank for storing hot water heated by a heat pump cycle.

Conventionally, in this type of hot water supply apparatus, in order to keep the heat storage tank warm and to insulate, a surface heat insulating material such as glass wool is wound around the outer surface of the hot water storage tank (for example, see Patent Document 1) And the thing (for example, refer patent document 2) of the structure which covers the whole outer side of a hot water storage tank using the foaming shaping | molding heat insulating material dividedly formed by four front and back is known.
JP-A-7-243705 JP 2002-310511 A

  However, in order to make the size of the tank unit compact, it is also known that a part of the heat insulating material covering the outside of the hot water storage tank is formed thin. For this reason, the thinned portion cannot obtain a sufficient heat retaining effect, and the heat of the hot water storage tank is radiated from the thin portion.

  Then, this invention is made | formed in view of the above-mentioned situation, and it aims at providing the tank unit from which sufficient heat retention effect is acquired also in the thin part of the heat insulating material which covers the outer side of a hot water storage tank. To do.

  For this reason, the first invention covers a thinned portion of the heat insulating material in a tank unit provided in the unit body by covering with a heat insulating material for keeping warm a hot water storage tank for storing hot water heated by a heat pump cycle. A concave space is formed in the inner surface portion along the hot water storage tank, and a thin high heat insulating material is disposed in the concave space.

  Moreover, 2nd invention covered the hot water storage tank which stores the hot water heated by a heat pump cycle with the heat insulating material for heat insulation, and respond | corresponded to the thinned part of the said heat insulating material in the unit main body. By forming a recessed space along the hot water storage tank on the inner surface and disposing a thin high heat insulating material in the recessed space, between the thin high heat insulating material and the hot water storage tank and / or the thin high heat insulating material. An air layer is formed between the heat insulating material and the heat insulating material.

  Furthermore, the third invention is the second invention, wherein an air layer is formed between the thin high thermal insulation and the hot water storage tank and / or between the thin high thermal insulation and the thermal insulation. A child is provided.

  ADVANTAGE OF THE INVENTION According to this invention, the tank unit which can obtain sufficient heat retention effect can be provided also in the thin part of the heat insulating material which covers the outer side of a hot water storage tank.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 4. First, an embodiment of a hot water supply apparatus including a hot water storage tank unit according to the present invention will be described. FIG. 1 is an explanatory diagram for explaining the installation state of the hot water supply apparatus of the present invention, FIG. 2 is a schematic configuration diagram of the overall configuration, and FIG. 3 is a hot water storage tank in a state where the unit body is removed and covered with a heat insulating material for convenience of explanation. 4 is a cross-sectional plan view of a hot water storage tank unit simplified for convenience of explanation, and FIG. 5 is a longitudinal side view of a thin high-heat insulation material.

  In FIG. 1, a heat pump type hot water supply apparatus 10 is composed of a heat pump unit 11 and a hot water storage tank unit 12 connected to the heat pump unit 11 by piping. The heat pump unit 11 and the hot water storage tank unit 12 are usually outdoors. It is assumed that it is installed on a veranda on a higher floor such as an apartment house. Further, the heat pump unit 11 and the hot water storage tank unit 12 may be integrated into a common exterior case.

  Next, referring to FIG. 2, the heat pump unit 11 includes a variable capacity compressor 13 such as a rotary two-stage compressor, a refrigerant-to-water heat exchanger 14 as a heating device, and an electric motor in a unit main body 11A. A decompression device 15 such as an expansion valve, an evaporator 16, a heat exchange blower 19 that ventilates the evaporator 16 to exchange heat with air, an accumulator 17, and a heat pump side control device 18 are housed. The compressor 13, the radiator 14A constituting the refrigerant-to-water heat exchanger 14, the pressure reducing device 15, the evaporator 16, and the accumulator 17 are connected in a ring shape by a refrigerant pipe 20, and carbon dioxide is used as a refrigerant. A heat pump cycle X that compresses to a supercritical pressure by the compressor 13 is configured. The refrigerant-to-water heat exchanger 14 includes the radiator 14A and the heat receiver 14B.

  The hot water storage tank unit 12 includes a vertically long hot water storage tank 22 made of a stainless steel plate, a water supply pipe 23 connected to the bottom of the hot water storage tank 22, a water supply opening / closing valve 24, a branch, in a unit body 12A having a U-shaped transverse plane. Water supply pipe 25, hot water storage pipe 26, hot water circulation pump 27, reheating pipe 28, reheating heat exchanger 29, bath water pipe 30, bath water circulation pump 31, reheating circulation pump 32, hot water supply It accommodates a pipe 33, a mixing valve 34, a bath hot water on / off valve 35, a tank side control device 36, and the like. A pressure relief valve 21 is connected to the hot water supply pipe 33.

  The outlet 26 A of the hot water storage pipe 26 is connected to the bottom of the hot water storage tank 22, and the inlet 26 B of the hot water storage pipe 26 is connected to the top of the hot water storage tank 22. The outlet 28A of the reheating pipe 28 and the hot water supply pipe 33 are connected to the top of the hot water storage tank 22, respectively.

  37 is a communication line for connecting the heat pump side control device 18 and the tank side control device 36, 38 is a kitchen remote controller, 39 is a bath remote controller, and these remote controllers 38 and 39 are tank side control devices. 36 is connected to the wiring. Reference numeral 40 denotes a bath tub.

  Here, when filling the bath tub 40 with hot water, when a bath hot water switch (not shown) of the bath remote controller 39 is pressed, the hot water tank 22 is pushed out to the hot water supply pipe 33. The hot water flowing into the mixing valve 34 is mixed with tap water supplied from the water supply pipe 23 and the branch water supply pipe 25, and hot water having a preset temperature is poured into the bathtub 40 through the hot water supply pipe 41. When the water is poured and a predetermined amount of water is poured, the filling is completed.

  As described above, when hot water is supplied to the use section such as the bathtub 40, the hot water in the hot water storage tank 22 is consumed, and the hot water layer in the hot water storage tank 22 is reduced. Hot water is stored only in the upper part of the hot water storage tank 22, and the intermediate part and lower part in the hot water storage tank 22 are in a state where hot water or water having a low temperature is stored, and a hot water layer of each temperature is formed.

  Next, hot water boiling operation will be described. First, when the compressor 13 of the heat pump cycle X is started by starting the operation of the heat pump unit 11, the refrigerant of carbon dioxide is compressed in two stages by the compressor 13, and the supercritical pressure that is compressed and discharged by the compressor 13 is high. The high-pressure liquid refrigerant dissipates heat in the radiator 14A, exchanges heat with water flowing through the heat receiver 14B, and heats the water.

  The refrigerant whose temperature has decreased due to heat dissipation by the radiator 14A is reduced in pressure by the decompression device 15 and becomes low pressure, and then flows into the evaporator 16, where it absorbs heat from the air and evaporates. It becomes a low-pressure gaseous refrigerant, flows into the accumulator 17, and is sucked into the compressor 13 from the accumulator 17 and compressed again.

  With the start of operation of the heat pump unit 11, the hot water circulation pump 27 in the hot water storage tank unit 12 is activated, and the operation of the circulation pump 27 causes the low-temperature or normal-temperature water in the lower part of the hot water storage tank 22 to exit from the outlet. It flows into the hot water storage pipe 26 from the section 26A, flows to the heat receiver 14B through the hot water circulation pump 27, and is heated by exchanging heat with the high-temperature and high-pressure refrigerant flowing in the radiator 14A. The hot water heated by the heat receiver 14B flows into the upper portion of the hot water storage tank 22 from the inlet portion 26B, and hot water of 80 ° C. or higher is stored in the hot water storage tank 22 as the boiling operation time elapses. When the amount of hot water increases gradually and the hot water layer reaches a certain position in the lower part of the hot water storage tank 22, the boiling operation is completed.

  In addition, by operating the bath water circulation pump 31 and the recuperation circulation pump 32, the hot water in the hot water storage tank 22 and the hot water in the bathtub 40 are heat-exchanged by the reheating heat exchanger 29, and the hot water in the bathtub 40 is heated. You can also chase.

  3 and FIG. 4, the hot water storage tank 22 is covered so as to be entirely surrounded by two left and right expanded polystyrene heat insulating materials 50 and 51 for keeping the hot water storage tank 22 warm and insulated. And the surrounding side part of the hot water storage tank 22 is hold | maintained using fastening tools (not shown), such as a metal wire.

  4, which is a cross-sectional plan view of the hot water storage tank unit 12, in order to make the size of the hot water storage tank unit 12 compact, the polystyrene foam heat insulating materials 50 and 51 covering the outside of the hot water storage tank 22 are partially thin. Is formed. That is, when viewed from the whole of the expanded polystyrene heat insulating material covering the hot water storage tank 22, when viewed in plan across the plane, a part of the arc EK on the rear surface portion and the both side surface portions is partially aligned with the rectangular hot water storage tank unit 12. It has been excised.

  For this reason, the thinned portion cannot obtain a sufficient heat retaining effect, and the heat of the hot water storage tank 22 is radiated from the thin portion. In view of this, the thin polystyrene foam heat insulating materials 50 and 51 covering the outside of the hot water storage tank 22 are configured as follows so that a sufficient heat retaining effect can be obtained.

  That is, a recessed space along the hot water storage tank 22 is formed on the inner surface of the expanded polystyrene heat insulating material 50, 51 from the end of one side surface of the expanded polystyrene heat insulating material 50, 51 to the end of the other side surface. And a thin high heat insulating material 53 is disposed in the recess space. In this case, in order to form an air layer 54 between the thin high heat insulating material 53 and the hot water storage tank 22 and / or between the thin high heat insulating material 53 and the polystyrene foam heat insulating materials 50 and 51, a plurality of layers are provided in the vertical and horizontal directions. The spacers 55 are arranged in a scattered manner. In this case, when the spacer 55 is disposed between the thin high-heat insulating material 53 and the hot water storage tank 22, at least one of the thin high heat insulating material 53 and the hot water storage tank 22, for example, a double-sided tape or the like. In the case where it is disposed between the thin high heat insulating material 53 and the polystyrene foam heat insulating materials 50, 51, for example, at least one of the thin high heat insulating material 53 and the hot water storage tank 22 is provided on both sides. You may stick with a tape etc.

  As shown in FIG. 5, the thin high heat insulating material 53 includes synthetic resin films 53B, 53B, 53B made of a polyethylene film between aluminum foils (hereinafter referred to as aluminum foils) 53A, 53A on both sides. The porous sheets 53C and 53C made of synthetic resin and made of polyethylene as a main component are arranged alternately, and the whole is laminated and integrated by plasma welding to form a planar shape.

  The planar thin high heat insulating material 53 has a thickness dimension T set to about 6 to 10 mm, and this type of heat insulating material is ultra thin. And this thin high heat insulating material 53, when the thickness dimension T is about 8 mm, the heat insulating effect corresponding to the thickness dimension of 80 mm of the molded heat insulating material of expanded polystyrene is obtained, and has flexibility, It can be easily cut with a cutter.

  The sheet-like thin high heat insulating material 53 is made of a resin that reflects the radiant heat with a high reflectivity by the action of the aluminum foil 53A facing the hot water storage tank 22, and is closed by synthetic resin films 53B, 53B, 53B. It has high heat transmission resistance characteristics due to the air insulation action of the porous sheets 53C and 53C, and high heat insulation even when the thickness dimension T is reduced to about 8 mm as compared with the conventional glass wool or polystyrene foam molded insulation. Demonstrate the effect. Moreover, since the air layer 55 formed by the spacer 55 is formed on both sides of the thin high heat insulating material 53, an air temperature zone is formed, and heat from the hot water storage tank 22 can be prevented from being radiated as much as possible. Even in the thinned portions of the heat insulating materials 50 and 51, a sufficient heat retaining effect can be obtained.

  Reference numeral 45 denotes a plurality of support legs fixed on the bottom surface B of the unit main body 12A, and supports the hot water storage tank 22. A plurality of support stands 46 are fixed to the bottom of the bottom surface B of the unit main body 12A.

  And on the left side of the front part of the unit main body 12A, a printed circuit board on which various electronic components such as a microcomputer constituting the tank side control device 36 are mounted in order from the top, a test operation switch connected to the printed circuit board, Board operation unit provided with a power contract setting switch or the like selected according to the contract type related to the time zone / charge with the electric power company, a breaker connected to this board operation unit and also connected to a 200 volt power source, kitchen Terminal block to which a communication line connected to the remote controller for bath 38 and the remote controller for bath 39, a power line from the outside of the unit body 12A, etc. are connected, a circulation pump 32 for reheating, a circulation pump 27 for hot water storage, a circulation for bath water The pumps 31 and the like are gathered and arranged in a biased manner.

  A door body 59 that can be opened and closed is provided at the front opening of the front unit main body 12A such as the board operation unit or the terminal block, and the front opening of the unit main body 12A on the right side of the board operation unit or the terminal block. The other door body 60 that can be opened and closed is provided. Accordingly, left and right vertically long door bodies 59 and 60 capable of opening and closing the front opening of the unit main body 12A are provided, and one door body 59 for opening and closing the front opening in front of the substrate operation section is disposed on the other. The area is about 1/3 of the door body 60 and is configured to be small.

  The door body 59 is provided with an operation door 61 that can be opened and closed at a position corresponding to the breaker so that the breaker can be operated, and the door body 60 can be operated with the pressure relief valve 21. An operation door 62 that can be opened and closed is provided at a position corresponding to the pressure relief valve 21.

  Although the embodiments of the present invention have been described above, various alternatives, modifications, and variations can be made by those skilled in the art based on the above description, and the various alternatives and modifications described above without departing from the spirit of the present invention. Or a modification is included.

It is explanatory drawing explaining the installation state of the hot water supply apparatus of this invention. It is a schematic block diagram of the whole structure similarly. It is a perspective view of the hot water storage tank unit of the state which removed the unit main body and coat | covered with the heat insulating material for convenience of explanation. It is the cross-sectional top view of the hot water storage tank unit simplified for convenience of explanation. It is a vertical side view of a thin high heat insulating material.

Explanation of symbols

X Heat pump cycle 11 Heat pump unit 12 Hot water storage tank unit 12A Unit body 22 Hot water storage tank 50, 51 Styrofoam insulation material 53 Thin high heat insulation material 54 Air layer 55 Spacer

Claims (3)

  In the tank unit provided in the unit body by covering the hot water storage tank for storing the hot water heated by the heat pump cycle with the heat insulating material, the inner surface portion corresponding to the thinned portion of the heat insulating material is attached to the hot water storage tank. A tank unit characterized in that a recessed space is formed along the recessed space, and a thin high heat insulating material is disposed in the recessed space.   In the tank unit provided in the unit body by covering the hot water storage tank for storing the hot water heated by the heat pump cycle with the heat insulating material, the inner surface portion corresponding to the thinned portion of the heat insulating material is attached to the hot water storage tank. Forming a recessed space along the recessed space, and disposing a thin and highly heat-insulating material in the recessed space, and / or between the thin and highly heat-insulating material and the hot water storage tank, and / or An air layer is formed between the tank units.   The space | interval element was arrange | positioned in order to form an air layer between the said thin high heat insulating material and the said hot water storage tank, and / or between the said thin high heat insulating material and the said heat insulating material. The tank unit described in

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