JP2012132626A - Hot water storage type water heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hot water storage type water heater capable of reliably securing the thermal insulation performance of a hot water tank and reducing a manufacture cost of a heat insulation material.SOLUTION: The hot water storage type water heater has the hot water storage tank 8 having a longitudinal cylindrical outer peripheral face for storing hot water heated by a heat pump unit and the heat insulation material 9 for covering the outer face side of the hot water storage tank 8. The heat insulation material 9 has a plurality of ring-like heat insulation materials 29 divided with a face orthogonal to an axial center of the hot water storage tank 8, and is composed to cover the surrounding of the hot water storage tank 8 by axially accumulating the ring-like heat insulation materials 29. When the hot water storage tank 8 expands to a direction (radial direction) orthogonal to the axial center by liquid pressure action, its expansion can be absorbed by the elastic deformation of the ring-like heat insulation material 29, and a gap between the ring-like heat insulation materials 29 is not enlarged.

Description

  The present invention relates to a hot water storage type hot water supply apparatus, and more particularly, to an improved structure of a heat insulating material that covers an outer surface side of a hot water storage tank that stores hot water.

  In recent years, a hot water storage type heat pump type hot water supply device using a heat pump has been put to practical use as a hot water storage type hot water supply device. This hot water supply device has a large-capacity hot water storage tank for storing hot water and a heat pump unit having a heat pump circuit, and heats tap water to hot water using the heat pump circuit by using cheap electricity at night discounts. The hot water is stored in a hot water storage tank and supplied to a desired hot water supply destination such as a faucet or a bath. The heat pump type hot water supply device heats the tap water by utilizing the change of the refrigerant state in the heat pump circuit, so it is more energy efficient than the combustion type or electric heater type hot water supply device, and the hot water supply cost is reduced. Can do.

  By the way, in the hot water storage type hot water supply device, since it is necessary to keep the hot water stored at night until the hot water is discharged, the outer surface of the hot water storage tank is covered with a heat insulating material to improve the heat insulating performance of the tank, and the temperature of the hot water Prevents the decline.

  In the hot water storage type water heater of Patent Document 1, the outer surface side of a hot water storage tank having a vertically long cylindrical outer peripheral surface is covered with a heat insulating material. This heat insulating material is formed of a foam heat insulating material obtained by foaming a resin such as expanded polystyrene, and an upper foam heat insulating material covering the tank upper portion, a lower foam heat insulating material covering the lower tank portion, and a body foam heat insulating material covering the tank body portion. It is configured to cover the hot water storage tank in combination with the material.

  The body portion foam heat insulating material is formed into a vertically long cylindrical body composed of a pair of front and rear divided bodies divided into two on a vertical plane including the axis of the hot water storage tank. In the body foam heat insulating material, at both ends in the circumferential direction of one divided body, convex insertion portions protruding outward are formed at the center in the height direction, and at both circumferential ends of the other divided body. Is formed with a concave insertion part into which the insertion part can be inserted at the center in the height direction.

JP 2009-47333 A

  In the hot water storage type water heater of Patent Document 1, when the hot water storage tank expands in the direction (radial direction) perpendicular to the axial center of the tank by the hydraulic action, the body foam heat insulating material moves in the radial direction, and a pair of Since a gap is generated at the joint where the divided bodies are abutted with each other, a heat dissipation loss from the gap increases, and the heat insulation performance of the hot water storage tank decreases. Further, even when the body foam heat insulating material contracts due to a change in diameter, a gap is formed at the joint of the pair of divided bodies, so that the heat insulating performance of the hot water storage tank cannot be maintained for a long period of time.

  Furthermore, since the body portion foam heat insulating material is a vertically long cylindrical body composed of a pair of front and rear divided bodies divided into two on the vertical plane including the axis of the hot water storage tank, Since the mold of this type becomes large, the mold production cost becomes high, and the production cost of the foam insulation cannot be reduced. The body foam insulation is extended parallel to the axial direction of the hot water storage tank so as to cover the outer peripheral surface of the vertically long tank body, so the body foam insulation is enlarged and the body foam insulation is When it is attached to the part, it is troublesome to handle.

  An object of the present invention is to provide a hot water storage hot water supply apparatus having a heat insulating material that can reliably ensure the heat insulation performance of the hot water storage tank, to provide a hot water storage hot water supply apparatus that can reduce the production cost of the heat insulating material, and to the hot water storage tank easily It is providing the hot water storage type hot water supply apparatus which has the heat insulating material which can be attached to.

  The hot water storage type hot water supply apparatus according to claim 1 comprises a hot water storage tank having a vertically long cylindrical outer peripheral surface for storing hot water heated by a heating means, and a heat insulating material covering an outer surface side of the hot water storage tank. In the apparatus, the heat insulating material has a plurality of annular heat insulating materials divided by a plane orthogonal to the axis of the hot water storage tank, and the annular heat insulating material is stacked in the axial direction to surround the hot water storage tank. It is characterized by being configured to cover. It is desirable that the plurality of annular heat insulating materials be configured in the same shape that can be molded with a common mold.

  The hot water storage type hot water supply apparatus according to claim 2 is provided with a plurality of temperature detecting means for detecting hot water stored in the hot water storage tank, and the temperature detecting means is provided with a plurality of joints or joints for abutting a plurality of annular heat insulating materials. It is characterized by being arranged in the vicinity.

  A hot water storage type hot water supply apparatus according to claim 3 is the invention of claim 1 or 2, further comprising an outer case capable of accommodating the hot water storage tank and a heat insulating material, wherein the outer peripheral shape of the annular heat insulating material is the same shape as the inner surface shape of the outer case. It is characterized by being formed.

  According to a fourth aspect of the present invention, there is provided a hot water storage type hot water supply apparatus according to any one of the first to third aspects of the invention, wherein at least one of an upper end heat insulating material covering the upper end portion of the hot water storage tank and a lower end heat insulating material covering the lower end portion is vacuum. It is characterized by comprising heat insulating material.

  According to a fifth aspect of the present invention, there is provided a hot water storage type hot water supply apparatus according to any one of the first to fourth aspects of the invention, wherein at least one annular heat insulating material can accommodate auxiliary equipment attached to the outer peripheral vicinity of the hot water storage tank. It is characterized by providing a storage section.

  According to invention of Claim 1, a heat insulating material has a some annular heat insulating material divided | segmented by the surface orthogonal to the axial center of a hot water storage tank, These hot water storage materials are stacked in the axial direction of a tank, and hot water storage water is stored. Since it is configured to cover the periphery of the tank, when the hot water storage tank expands in the direction (radial direction) perpendicular to the shaft center due to hydraulic action, the expansion can be absorbed by the elastic deformation of the annular heat insulating material. Since the gap between them does not increase, the heat insulation performance of the hot water storage tank can be secured. In addition, even when the annular heat insulating material contracts in the radial direction due to a change in the diameter, there is no gap between the annular heat insulating materials, so that the heat insulation performance of the hot water storage tank can be ensured for a long period of time.

  Since the heat insulating material has a plurality of annular heat insulating materials divided by a plane orthogonal to the axis of the hot water storage tank, it is possible to reduce the size of a common mold for forming the heat insulating material. This can reduce the production cost of the heat insulating material.

Since the heat insulation material covers the periphery of the hot water storage tank by stacking a plurality of annular heat insulation materials in the axial direction of the hot water storage tank, it is possible to reduce the size of the circular heat insulation material. At the time, each annular heat insulating material can be easily handled, and due to the weight of one or more annular heat insulating materials, there are no gaps at the plurality of joints of the plurality of annular heat insulating materials, and the circular heat insulating material has a backlash. And misalignment can be prevented.
Since a plurality of annular heat insulating materials are stacked in the axial direction of the hot water storage tank so as to cover the periphery of the hot water storage tank, it is possible to cope with various hot water storage tanks having different heights.

  According to the invention of claim 2, since the plurality of temperature detecting means are respectively arranged at the plurality of seams or the vicinity of the seam where the plurality of annular heat insulating materials are abutted, it is easy to attach the plurality of temperature detecting means. It can be carried out. Further, when the temperature detection means is replaced due to a failure or the like, the temperature detection means can be easily replaced by moving a part of the annular heat insulating material slightly in the axial direction to form a construction gap. In other words, a hole for visually recognizing the temperature detection means is separately formed in the annular heat insulating material, and further, it is not necessary to provide a member for closing the hole in order to maintain the heat insulating performance of the tank, so the annular heat insulating material is easily formed. In addition, the heat insulation performance of the annular heat insulating material can be maintained, and the production cost can be reduced.

  According to the invention of claim 3, since the outer case of the hot water storage tank and the heat insulating material can be accommodated, and the outer peripheral shape of the annular heat insulating material is formed in the same shape as the inner surface shape of the outer case, It can be accommodated between the inner surface of the outer case and the inner surface with almost no gap, and can be in close contact with the outer peripheral surface of the hot water storage tank to ensure the heat insulating performance of the tank over a long period of time.

  According to invention of Claim 4, since at least one of the upper end heat insulating material which covers the upper end part of a hot water storage tank and the lower end heat insulating material which covers a lower end part was comprised with the vacuum heat insulating material, the upper end part and lower end part of a hot water storage tank Can improve the heat insulation performance.

  According to the fifth aspect of the present invention, since at least one annular heat insulating material is provided with the accommodating portion capable of accommodating the auxiliary equipment attached to the vicinity of the outer periphery of the hot water storage tank, the auxiliary equipment is accommodated in the outer case. Therefore, it is not necessary to provide a space for the exterior case, and the outer case can be downsized.

It is a schematic block diagram of a hot water storage type hot water supply apparatus. It is a longitudinal cross-sectional view of a hot water storage tank unit. It is a cross-sectional view of a hot water storage tank unit. It is a longitudinal cross-sectional view of the hot water storage tank unit of Example 2. 6 is a longitudinal sectional view of a hot water storage tank unit of Example 3. FIG. 6 is a longitudinal sectional view of a hot water storage tank unit according to Embodiment 4. FIG. It is a cross-sectional view of the hot water storage tank unit of Example 5. It is a longitudinal cross-sectional view of the hot water storage tank unit of Example 6.

  Hereinafter, modes for carrying out the present invention will be described based on examples.

  As shown in FIG. 1, a hot water storage heat pump type hot water supply device 1 that is a hot water storage type hot water supply device includes a hot water storage tank unit 2, a heat pump unit 3 (heating means), and pipes 6, 11, 12, 13 a, 13 b, 15. And a main control unit 7.

  As shown in FIGS. 1 and 2, the hot water storage tank unit 2 includes a hot water storage tank 8 having a vertically long cylindrical outer peripheral surface, a heat insulating material 9 covering the outer surface side of the hot water storage tank 8, a hot water storage tank 8 and a heat insulating material 9. And an exterior case 10 capable of accommodating the above. The hot water storage tank 8 stores high-temperature hot water heated by the heat pump unit 3, and is composed of a stainless steel plate material excellent in corrosion resistance. A tank lower portion 8b and a tank body portion 8c formed in a vertically long cylindrical shape are integrated by welding.

  A lower pipe 12 connected to a water supply pipe 11 such as a water pipe and a hot water circulation pipe 13a is connected to the lower end of the tank lower part 8b. The water supply pipe 11 is provided with an open / close valve 5 for replenishing the hot water storage tank 8 with tap water, and the open / close valve 5 is opened to replenish the hot water storage tank 8 with tap water. Warm water (reserved water) is sent from the hot water storage tank 8 through the liquid feed pump 37 to the heat pump unit 3 through the lower pipe 12 and the hot water circulation pipe 13a. The hot water heated by the heat pump unit 3 flows into the hot water circulation pipe 13b.

  An upper pipe 15 connected to the hot water circulation pipe 13b and the hot water pipe 6 is connected to the upper end of the tank upper portion 8a. An opening / closing valve 14 is provided in the upper pipe 15. When the on-off valves 5 and 14 are opened, high-temperature hot water (for example, 80 to 90 ° C.) stored in the hot water storage tank 8 can be supplied to the upper pipe 15.

  The heat insulating material 9 is made of, for example, a foam heat insulating material obtained by foaming a resin such as foamed polypropylene or expanded polystyrene, and covers the outer surface of the hot water storage tank 8 to prevent a decrease in temperature of the hot water stored in the hot water storage tank 8. Have The heat insulating material 9 will be described in detail later.

  The exterior case 10 is made of a thin steel plate and is formed in a rectangular parallelepiped box shape having a predetermined length in the axial direction of the hot water storage tank 8, and includes a pair of left and right side plates, a pair of front and rear front plates, and a rear plate. It consists of a face plate, a pair of upper and lower upper surface plates (top plate), and a lower surface plate.

  The heat pump unit 3 includes a heat exchanger 16a for absorbing atmospheric heat, an electric fan 16b, an evaporator unit 16 having a fan motor 16c, a compressor 17, and a condenser on a circulation circulation path of a refrigerant such as carbon dioxide. A heat pump circuit 3A in which a heat exchanger 18 for heating hot water as a heat exchanger, an expansion valve 19 that rapidly expands a high-pressure refrigerant to lower the pressure, and an auxiliary control unit 20 connected to the main control unit 7 And a case 21 for housing them.

  In the heat pump unit 3, the refrigerant that is compressed to a high pressure by driving the compressor 17 and is heated is sent to the heat exchanger 18 for heating the hot water, and the liquid feed pump 37 is driven to move from the lower end portion of the tank lower portion 8 b to the lower portion. The hot water or water flowing into the hot water circulation pipe 13a through the pipe 12 is heat-exchanged to warm the hot water or water, and the heated hot water passes through the hot water circulation pipe 13b and the upper pipe 15 to store hot water in the hot water storage tank unit 2. Hot hot water is stored in the hot water storage tank 8 by repeating the heating operation stored in the tank 8 and passing through the heat pump unit 3.

  The auxiliary control unit 20 is capable of data communication with the main control unit 7, and performs operation control of various devices (fan motor 16c, compressor 17 and the like) of the heat pump circuit 3A according to instructions from the main control unit 7. . At the outlet side portion of the hot water heating heat exchanger 18, the hot water circulation pipe 13 b is provided with a temperature sensor 22 for detecting the hot water temperature, and the detection signal is supplied to the main controller 7. The auxiliary control unit 20 operates the heat pump unit 3 until the heating temperature of the hot water reaches the temperature instructed by the main control unit 7.

  When a hot water supply operation is performed by the user, the hot water stored in the hot water storage tank 8 flows into the hot water supply pipe 6, and the hot water and tap water supplied from the water supply pipe 11 are mixed by the mixing valve 23 to obtain a predetermined temperature. Then, hot water is supplied to the hot water tap 4 such as a faucet. Temperature sensors 24-26 for detecting the hot water temperature or the incoming water temperature are provided in the upstream part, the downstream part of the mixing valve 23, and the middle part of the water supply pipe 11, respectively, and the detection signals of these temperature sensors 24-26 are provided. It is supplied to the main control unit 7. The main control unit 7 adjusts the temperature of hot water to be supplied by controlling the mixing valve 23 and adjusting the mixing ratio of the hot water and water based on the temperature detection data detected by these temperature sensors 24 to 26.

Next, the heat insulating material 9 unique to the present application covering the outer surface side of the hot water storage tank 8 will be described.
As shown in FIGS. 2 and 3, the heat insulating material 9 includes an upper heat insulating material 28 covering the outer surface of the tank upper portion 8a, a plurality of annular heat insulating materials 29 covering the outer peripheral surface of the vertically long cylindrical tank body portion 8c, and a tank lower portion. And a lower heat insulating material 30 covering the outer surface of 8b, and the upper heat insulating material 28, a plurality of annular heat insulating materials 29, and the lower heat insulating material 30 are stacked in the axial direction of the hot water storage tank 8 to cover the periphery of the hot water storage tank 8. It is configured as follows. A plurality of support legs (not shown) that support the weight of the hot water storage tank 8 are provided, and these support legs extend downward through the lower heat insulating material 30.

  In the heat insulating material 9, the upper heat insulating material 28 and the lower heat insulating material 30 are formed in substantially the same shape, and the outer peripheral shape thereof is formed in the same shape as the inner surface shape of the exterior case 10. In the central portions of the upper heat insulating material 28 and the lower heat insulating material 30, storage concave portions 28a and 30a capable of storing the tank upper portion 8a and the tank lower portion 8b are formed, respectively.

  The heat insulating material 9 has a plurality of annular heat insulating materials 29 divided by a plane perpendicular to the axial direction at predetermined intervals in the axial direction of the tank body portion 8c. The tank body portion 8c is covered by being stacked in the axial direction.

  Each annular heat insulating material 29 has a predetermined thickness in the axial direction, is configured as an integrated product that is continuous in the circumferential direction and the vertical direction, and the outer peripheral shape thereof is formed in the same shape as the inner surface shape of the outer case 10. . In the center portion of the annular heat insulating material 29, a tank insertion hole 29a having a circular shape in plan view is formed through which the tank body portion 8c can be inserted with a minute gap. Each annular heat insulating material 29 has an inner peripheral surface of the tank insertion hole 29a fitted on an outer peripheral surface of the tank body 8c.

  The seam where the plurality of annular heat insulating materials 29 are abutted is determined by the pressing force acting by bolting the top plate of the outer case 10 covering the upper end of the upper heat insulating material 28 and the own weight of the one or more annular heat insulating materials 29. Close without gaps. Temperature sensors 31 to 34 (temperature detection means) are disposed in the vicinity of the seams of the plurality of annular heat insulating materials 29 and in the vicinity of the seams of the upper heat insulating material 28 and the lower heat insulating material 30, respectively. These temperature sensors 31 to 34 are connected to the main controller 7, detect the temperature of the hot water storage tank 8 at positions at predetermined intervals in the height direction, and supply these temperature detection signals to the main controller 7.

  The main control unit 7 executes a determination process for determining the remaining hot water amount in the hot water storage tank 8 based on the temperature detection data from the temperature sensors 31 to 34. That is, the detected temperature is higher than a predetermined value (for example, 80 to 90 ° C.) at a portion with hot water, but the detected temperature is lower than the above value at a portion without hot water. In the determination process, for example, if the temperature detected by the temperature sensor 34 is equal to or higher than a predetermined value, it is determined that the amount of hot water stored in the hot water storage tank 8 is full.

  The main control unit 7 can perform data communication with an operation remote controller 27 that can be operated by the user. When the target hot water supply temperature is set by a switch operation of the operation remote controller 27 by the user, the target hot water supply temperature data is stored in the operation remote controller. 27 to the main control unit 7. During the hot water supply operation, the main control unit 7 determines a heating temperature for heating the hot water by the heat pump unit 3 based on the target hot water supply temperature data and the temperature detection data from the temperature sensors 31 to 34, and the auxiliary control unit 20 supplies the heating temperature. Indicate the temperature.

The effect of the hot water storage type heat pump type hot water supply apparatus 1 demonstrated above is demonstrated.
In this hot water storage type heat pump type hot water supply apparatus 1, various devices (fan motor 16 c, compressor 17, etc.) of the heat pump unit 3 are driven using the cheap power at night discount, and the heat pump unit 3 makes a day. Make the required amount of hot water, store the hot hot water stored in the hot water storage tank 8, and mix the hot hot water and tap water to make the desired temperature desired by the user, Hot water supply to a hot water supply destination such as a bath.

  The outer surface of the hot water storage tank 8 is covered with a heat insulating material 9, and the heat insulating material 9 has a plurality of annular heat insulating materials 29 divided by a surface orthogonal to the axial center of the vertically long cylindrical tank body 8c. Since the annular heat insulating material 29 is stacked in the axial direction so as to cover the outer peripheral surface of the vertically long cylindrical tank body 8c, the hot water storage tank 8 is perpendicular to the axial center by the hydraulic action (radial direction). ) Can be absorbed by elastic deformation of the annular heat insulating material 29, and no gap is generated between the annular heat insulating materials 29, so that the heat insulation performance of the hot water storage tank 8 can be ensured. Even when the annular heat insulating material 29 contracts in the radial direction due to a change in diameter, no gap is generated between the annular heat insulating materials 29, so that the heat insulation performance of the hot water storage tank 8 can be ensured over a long period of time.

  Since the heat insulating material 9 has a plurality of annular heat insulating materials 29 of the same size and the same shape divided by a plane orthogonal to the axis of the tank body 8c, a small size common to the plurality of annular heat insulating materials 29 is formed. Since it can be molded with a mold, the mold production cost can be reduced, and the production cost of the heat insulating material 9 can be reduced.

  Since the heat insulating material 9 is configured to cover the periphery of the tank body 8c by stacking a plurality of annular heat insulating materials 29 in the axial direction of the hot water storage tank 8, it can be easily attached to the tank body 8c. Due to the dead weight of the annular heat insulating material 29, no gaps are formed at a plurality of joints of the plurality of annular heat insulating materials 29, and rattling or deviation of the annular heat insulating material 29 can be prevented. Moreover, since it comprised so that the circumference | surroundings of the tank trunk | drum 8c may be covered by stacking the some cyclic | annular heat insulating material 29 in the axial center direction of the hot water storage tank 8, it can respond to the various hot water storage tanks from which height differs.

  Since the plurality of temperature sensors 31 to 34 are disposed in the vicinity of the plurality of joints where the plurality of annular heat insulating materials 29 are abutted, the attaching operation of the plurality of temperature sensors 31 to 34 can be easily performed. In addition, when replacing the temperature sensors 31 to 34 due to a failure or the like, the temperature sensors 31 to 34 can be easily replaced by moving some of the heat insulating materials 28 to 30 slightly in the axial direction to form a construction gap. Can be done. That is, it is not necessary to separately form holes for visually recognizing the temperature sensors 31 to 34 in the annular heat insulating material 29, and further, to maintain the heat insulation performance of the hot water storage tank 8, it is not necessary to provide a member for closing the holes. The material 29 can be easily molded, the heat insulating performance of the annular heat insulating material 29 can be maintained, and the production cost can be reduced.

  Since the outer case 10 capable of accommodating the hot water storage tank 8 and the heat insulating material 9 is provided and the outer peripheral shape of the annular heat insulating material 29 is formed in the same shape as the inner surface shape of the outer case 10, the annular heat insulating material 9 is connected to the hot water storage tank 8 and the outer case. 10 can be accommodated with almost no gap between the inner surface of the hot water storage tank 10 and the heat insulating performance of the hot water storage tank 8 can be secured over a long period of time by being in close contact with the outer peripheral surface of the hot water storage tank 8.

  Next, Embodiments 2 to 6 in which the hot water storage unit 2 is partially changed will be described. However, the same components as those in Embodiment 1 are denoted by the same reference numerals, and the description thereof is omitted. Only will be described.

  As shown in FIG. 4, in the hot water storage tank unit 2A, the heat insulating material 9A includes an upper annular heat insulating material 28A, a plurality of annular heat insulating materials 29, a lower annular heat insulating material 30A, an upper end heat insulating material 35, and a lower end heat insulating material 36. And.

  The upper annular heat insulating material 28A and the lower annular heat insulating material 30A have a predetermined thickness in the tank axial direction, and are formed in the same size and shape as the annular heat insulating material 29. These heat insulating materials 28A, 29, and 30A are made of the same foam heat insulating material as the heat insulating material 9 of the first embodiment. The upper end heat insulating material 35 and the lower end heat insulating material 36 are formed of a square flat plate-like foam heat insulating material having a smaller thickness (or equivalent thickness) than the heat insulating materials 28A, 29, and 30A. The upper end of the material 28A is covered, and the lower end heat insulating material 36 covers the lower end of the lower annular heat insulating material 30A.

In the case of the heat insulating material 9A, the heat insulating materials 28A, 29, and 30A can be formed using a common small mold, and the upper heat insulating material 35 and the lower heat insulating material 36 can be manufactured by cutting out from a flat foam. Therefore, a molding die can be omitted.
As a modification, the upper heat insulating material 35 may be made of a vacuum heat insulating material, and each of the upper heat insulating material 35 and the lower heat insulating material 36 may be made of a vacuum heat insulating material. In this case, since the thickness of the heat insulating materials 35 and 36 can be further reduced, the heat insulating materials 35 and 36 can be configured compactly and heat insulation performance can be secured.

  As shown in FIG. 5, in the hot water storage tank unit 2B, the heat insulating material 9B includes an upper annular heat insulating material 28B, a lower annular heat insulating material 30B, a plurality of annular heat insulating materials 29, an upper end heat insulating material 35B, and a lower end heat insulating material 36B. And. These heat insulating materials 28B, 29, 30B, 35B, and 36B are made of a foam heat insulating material in the same manner as the heat insulating material 9 of the first embodiment.

  The upper annular heat insulating material 28B and the lower heat insulating material 30B differ only in that they are formed thicker than the annular heat insulating material 29, and are configured in the same shape in plan view. That is, a tank insertion hole 28b through which the tank upper portion 8a can be inserted is formed at the central portion of the upper annular heat insulating material 28B, and a tank insertion hole 30b through which the tank lower portion 8b can be inserted at the central portion of the lower heat insulating material 30B. Is formed. The upper end heat insulating material 35B is configured by a disk-shaped foam heat insulating material that closes the upper end side portion of the tank insertion hole 28b, and the lower end heat insulating material 36B is a disk-shaped foam heat insulating material that closes the lower end side portion of the tank insertion hole 30b. It consists of

  As a modified example, the upper heat insulating material 35B may be formed in a shape that fills the annular gap on the lower surface side instead of a flat plate shape, and similarly, the lower end heat insulating material 36B is not formed in a flat plate shape but on the upper surface side. It may be formed in a shape that fills the annular gap. Moreover, you may comprise the upper end heat insulating material 35B and the lower end heat insulating material 36B with a vacuum heat insulating material instead of a foam heat insulating material, respectively.

As shown in FIG. 6, in the hot water storage tank unit 2C, the heat insulating material 9C includes an upper heat insulating material 28C, a plurality of annular heat insulating materials 29C, and a lower heat insulating material 30C.
Since the heat insulating materials 28C, 29C, and 30C have substantially the same shape as the heat insulating materials 28, 29, and 30 of the first embodiment, only different points will be described.
In the heat insulating material 9C, the annular engaging convex portions 28c, 29d, 30c and the annular engaging concave portions 29c, 29e are engaged with the boundary portions between the heat insulating materials 28C, 29C, 30C and the heat insulating materials 29C, 30C. Insulation structure is provided to improve heat insulation performance.

  An annular recess 29c is formed in the inner peripheral portion of the upper end portion of the annular heat insulating material 29C, and the annular convex portion 28c formed in the inner peripheral portion of the lower end portion of the upper heat insulating material 28C is engaged with the uppermost annular recess 29c. Has been. An annular convex portion 29d formed on the inner peripheral portion of the lower end portion of the uppermost annular heat insulating material 29C is engaged with the lower annular concave portion 29c.

  An annular convex portion 29d formed on the inner peripheral portion of the lower end portion of the middle-stage annular heat insulating material 29C is engaged with the lower annular concave portion 29c. An annular convex portion 30c formed on the inner peripheral portion of the upper end portion of the lower heat insulating material 30C is engaged with an annular concave portion 29e formed on the inner peripheral portion of the lower end portion of the lowermost annular heat insulating material 29C. Thus, since the engagement structure which engaged the engagement convex part 28c, 29d, 30c and the engagement recessed part 29c, 29e was provided, the heat insulation performance can be improved reliably.

  As shown in FIG. 7, in the hot water storage tank unit 2D, the heat insulating material 9D has a plurality of annular heat insulating materials 29D, and at least one of the plurality of annular heat insulating materials 29D includes the outer periphery of the trunk tank 8c. An accommodation recess 29f for accommodating auxiliary equipment such as a heat exchanger 37 and a pipe 38 attached to the vicinity is provided. Thereby, it is not necessary to provide the exterior case 10 with a space for accommodating the auxiliary machinery, and the exterior case 10 can be downsized. In addition, you may provide the said accommodation recessed part 29f in each of several cyclic | annular heat insulating material 29D.

  As shown in FIG. 8, a hot water storage tank unit 2E includes a vertically long cylindrical hot water storage tank 8E, a heat insulating material 9E that covers the outer surface of the hot water storage tank 8E, and an exterior case that can accommodate the hot water storage tank 8E and the heat insulating material 9E. 10.

  The heat insulating material 9E includes an upper heat insulating material 28E, a plurality of annular heat insulating materials 29E divided by a surface orthogonal to the axis of the hot water storage tank 8E, and a lower heat insulating material 30E. In the central portions of the upper heat insulating material 28E and the lower heat insulating material 30E, circular storage recesses capable of storing the tank upper portion and the tank lower portion are formed, respectively. The annular heat insulating material 29E has the same structure as the annular heat insulating material 29 of the first embodiment.

  The upper heat insulating material 28E, the plurality of annular heat insulating materials 29E, and the lower heat insulating material 30E are stacked in the axial direction so as to cover the periphery of the cylindrical hot water storage tank 8E. However, as an example of a change, the upper heat insulating material 28E and the lower heat insulating material 30E of the heat insulating material 9E may be divided into two parts, respectively, to have the same structure as the heat insulating material 9A of the second embodiment.

In addition, the said Example can be changed as follows.
(1) You may provide the temperature sensors 31-34 in the state over the both sides of the some joint part which abuts the some cyclic | annular heat insulating material 29. FIG.
(2) You may make the outer periphery shape of a cyclic | annular heat insulating material into a circular shape.
(3) The annular heat insulating material may be constituted by a vacuum heat insulating material, and the whole heat insulating material may be constituted by a vacuum heat insulating material.

(4) In addition, in the range which does not deviate from the meaning of this invention, it can implement by adding various changes to the said Example, and the heat insulating material of this invention is applicable to the hot water storage tank of various shapes and capacity | capacitance. is there. Further, the heat insulating material of the present invention can be similarly applied to a hot water storage type combustion hot water supply device and a hot water storage type electric heater type hot water supply device.

DESCRIPTION OF SYMBOLS 1 Hot water storage type heat pump type hot water storage apparatus 2, 2A-2E Hot water storage tank unit 3 Heat pump unit 8, 8E Hot water storage tank 9, 9A-9E Thermal insulation material 10 Exterior case 29, 29C, 29D, 29E Annular thermal insulation material 29f Accommodation recessed part 31-34 Temperature Sensors 35, 35B Upper heat insulating material 36, 36B Lower heat insulating material 37, 38 Auxiliary equipment

Claims (5)

In a hot water storage hot water supply apparatus having a hot water storage tank having a vertically long cylindrical outer peripheral surface for storing hot water heated by a heating means, and a heat insulating material covering the outer surface side of the hot water storage tank,
The heat insulating material has a plurality of annular heat insulating materials divided by a plane orthogonal to the axis of the hot water storage tank, and covers the periphery of the hot water storage tank by stacking the annular heat insulating materials in the axial direction. A hot water storage type hot water supply apparatus characterized by comprising. Provided with a plurality of temperature detection means for detecting the temperature of the hot water stored in the hot water storage tank,
2. The hot water storage type hot water supply apparatus according to claim 1, wherein the temperature detecting means are respectively arranged at a plurality of joint portions where the plurality of annular heat insulating materials are abutted or in the vicinity of the joint portions. An exterior case capable of accommodating the hot water storage tank and heat insulating material;
The hot water storage type hot water supply apparatus according to claim 1 or 2, wherein an outer peripheral shape of the annular heat insulating material is formed in the same shape as an inner surface shape of an outer case.   The at least one of the upper end heat insulating material which covers the upper end part of the said hot water storage tank, and the lower end heat insulating material which covers a lower end part was comprised with the vacuum heat insulating material, The any one of Claims 1-3 characterized by the above-mentioned. Hot water storage water heater.   5. The hot water storage according to claim 1, wherein at least one annular heat insulating material is provided with an accommodating portion capable of accommodating auxiliary equipment attached to an outer peripheral vicinity of the hot water storage tank. Water heater.