JP2019190668A - Heat storage type water heating device - Google Patents

Abstract

To provide a heat storage type water heating device which has suppressed increase in a power amount according to heating of a latent heat storage tank and deterioration in energy efficiency, in the heat storage type water heating device including the latent heat storage tank and a hot water storage tank.SOLUTION: A heat storage type water heating device includes: a temperature stratification type hot water storage tank 31 for storing high temperature water heated in a heating device 33; a hot water storage tank unit 3 in which the hot water storage tank 31 is disposed in a housing; a latent heat storage tank 21; and a heat storage unit 2 in which the latent heat storage tank 21 is disposed in a housing. The heat storage unit 2 is installed on an upper surface of the housing of the hot water storage tank unit 3, and heat resistance R1 including from an upper surface of the latent heat storage tank 21 to a member for forming the housing of the heat storage unit 2 opposing to the upper surface of the latent heat storage tank 21 is larger than heat resistance R2 including from a lower surface of the latent heat storage tank 21 to a member for forming a top surface of the hot water storage tank 31.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a heat storage type hot water apparatus that stores thermal energy held by a high temperature heat medium in a latent heat storage tank or a hot water storage tank.

  Conventionally, this type of regenerative hot water apparatus stores a high-temperature heat medium generated by a heat source and uses it in a user terminal such as hot water supply (see, for example, Patent Document 1). FIG. 6 shows a conventional heat storage type hot water apparatus described in Patent Document 1. As shown in FIG.

  As shown in FIG. 6A, the heat source 400 is connected to the latent heat storage tank 200 via the first circulation circuit 410. The latent heat storage tank 200 is connected to the hot water storage tank 300 via the second circulation circuit 420. The hot water storage tank 300 is configured to be connected to a faucet 510, an air conditioner 520, and a bathtub 530, which are user terminals.

  The high-temperature heat medium generated by the heat source 400 circulates through the first circulation circuit 410, dissipates heat in the latent heat storage tank 200, and the latent heat storage tank 200 stores heat. In accordance with the heat demand at the user terminal, a part of the stored heat energy is transferred to the hot water storage tank 300 via the second circulation circuit 420 and used for heating the water in the hot water storage tank 300, and hot water is stored in the hot water storage tank 300. It is generated and stored in the hot water storage tank 300. The generated hot water is transported to a use terminal and used for hot water supply, heating, bath, and the like.

  When the temperature of the latent heat storage tank 200 becomes a predetermined temperature or lower, a high-temperature heat medium circulates from the heat source 400, radiates heat in the latent heat storage tank 200, the latent heat storage tank 200 stores heat, and a predetermined temperature is secured.

  In particular, as shown in FIG. 6A, when heat energy is stored using the latent heat storage tank 200, the heat storage density can be increased as compared with the case where heat energy is stored by sensible heat such as water. Reduction of the heat storage container volume and the amount of heat released from the surface of the heat storage container can be reduced.

  FIG. 6B is a general view showing the arrangement state of the devices. FIG. 6B discloses a configuration in which the latent heat storage tank 200 is disposed on the lower side of the hot water storage tank 300 and integrated.

JP 2011-237138 A

  However, in the conventional configuration, the upper surface of the latent heat storage tank is adjacent to the lower surface of the hot water storage tank forming the temperature stratification, so that the high temperature latent heat storage tank is cooled by the lower surface of the low temperature hot water storage tank. Thus, the temperature of the latent heat storage tank is lowered, and there is a problem that there is a possibility that the amount of electric power for heating the latent heat storage tank is increased and energy efficiency is lowered.

  The present invention solves the above-described conventional problems, and in a heat storage type hot water apparatus including a latent heat storage tank and a hot water storage tank, an increase in the amount of electric power accompanying the heating of the latent heat storage tank and a decrease in energy efficiency are suppressed. An object is to provide a heat storage type hot water apparatus.

  In order to solve the above-described conventional problems, a heat storage type hot water apparatus of the present invention includes a temperature stratification type hot water storage tank for storing hot water heated by a heating device, and the hot water storage tank in a housing. A hot water storage tank unit, a latent heat storage tank, and a heat storage unit in which the latent heat storage tank is disposed, and the heat storage unit is installed on an upper surface of the casing of the hot water storage tank unit. The thermal resistance R1 including from the upper surface of the latent heat storage tank to the member that forms the housing of the heat storage unit facing the upper surface of the latent heat storage tank, the top surface of the hot water storage tank from the lower surface of the latent heat storage tank. It is larger than the thermal resistance R2 including the members to be formed.

  Thereby, since the temperature difference between the lower surface of the latent heat storage tank and the upper surface of the hot water storage tank that is a temperature stratification type is small, the amount of heat transfer between the latent heat storage tank and the hot water storage tank is reduced. An increase in the amount of electric power can be suppressed.

  Further, since R2 <R1, heat radiation from the latent heat storage tank to the outside air side of the heat storage unit can be suppressed, and the temperature of the latent heat storage tank becomes lower than the temperature of the hot water storage tank, and the latent heat storage tank side from the hot water storage tank side Even when the heat has moved, since the heat storage performance of the moved heat to the latent heat storage tank can be improved, a decrease in energy efficiency can be suppressed.

  ADVANTAGE OF THE INVENTION According to this invention, the thermal storage type hot water apparatus provided with the latent heat storage tank and the hot water storage tank can provide the thermal storage type hot water apparatus which suppressed the increase in the electric energy accompanying the heating of a latent heat storage tank, and the fall of energy efficiency.

Schematic configuration diagram of a regenerative hot water apparatus in Embodiment 1 of the present invention (A) Temperature distribution diagram in the case of R2> R1 of the heat storage type hot water apparatus in Embodiment 1 of the present invention (b) Temperature distribution diagram in the case of R2 <R1 of the heat storage type hot water apparatus in Embodiment 1 of the present invention Schematic explanatory diagram in the case where high-temperature water is discharged from only the tank outlet pipe of the regenerative hot water apparatus according to Embodiment 1 of the present invention. Schematic explanatory drawing in the case where high-temperature water is discharged from a heat storage outlet pipe through a heat storage unit from a tank outlet pipe of the heat storage type hot water apparatus according to Embodiment 1 of the present invention. Schematic explanatory drawing in the case of storing heat in the latent heat storage tank of the heat storage type hot water apparatus in Embodiment 1 of the present invention (A) Schematic configuration diagram of a conventional heat storage type hot water apparatus (b) Overview diagram showing the arrangement state of a conventional heat storage type hot water apparatus

  A first invention is a temperature stratification type hot water storage tank for storing hot water heated by a heating device, a hot water storage tank unit in which the hot water storage tank is disposed in a casing, a latent heat storage tank, and a casing. A heat storage unit in which the latent heat storage tank is disposed, and the heat storage unit is installed on an upper surface of a housing of the hot water storage tank unit, and from the upper surface of the latent heat storage tank, the latent heat storage tank The thermal resistance R1 including the member that forms the casing of the heat storage unit facing the upper surface of the heat storage is greater than the thermal resistance R2 that includes the bottom surface of the latent heat storage tank to the member that forms the top surface of the hot water storage tank. It is a hot water device.

  As a result, since the temperature difference between the lower surface of the latent heat storage tank and the upper surface of the hot water storage tank that is a temperature stratification type is small, the amount of heat transfer between the latent heat storage tank and the hot water storage tank is reduced. The increase in the amount of power accompanying the can be suppressed.

  Further, since R2 <R1, heat radiation from the latent heat storage tank to the outside air side of the heat storage unit can be suppressed, and the temperature of the latent heat storage tank becomes lower than the temperature of the hot water storage tank, and the latent heat storage tank side from the hot water storage tank side Even when the heat has moved, since the heat storage performance of the moved heat to the latent heat storage tank can be improved, a decrease in energy efficiency can be suppressed.

  In particular, the second aspect of the present invention is the heat storage type hot water apparatus of the first aspect of the invention, further comprising a heat insulating material for a latent heat storage tank that covers the latent heat storage tank, and the latent heat storage tank of the heat insulating material for the latent heat storage tank from above. The thermal resistance of the site | part to cover is larger than the thermal resistance of the site | part which covers the said latent heat storage tank of the said heat insulating material for latent heat storage tanks from the downward side.

  Thereby, since the heat | fever currently hold | maintained at a latent-heat storage tank is easy to move to the hot water storage tank unit side rather than the external air side outside a thermal storage unit, the fall of energy efficiency can be suppressed.

  In particular, the third aspect of the present invention relates to the heat storage hot water apparatus of the first or second aspect of the invention, a heat storage water inlet pipe that enters the latent heat storage tank, and a tank outlet pipe that discharges water stored in the hot water storage tank. The heat storage inlet pipe and the tank outlet pipe are connected via a switching device.

  As a result, when the temperature of the hot water stored in the hot water storage tank is high, a flow path for discharging only the hot water stored in the hot water storage tank is formed by the switching device, and the hot water stored in the hot water storage tank is If the temperature of the hot water storage tank is low, the water storage tank can be heated in the latent heat storage tank, and then a flow path for discharging the hot water can be formed by the switching device. Can be provided.

  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)
FIG. 1: shows the schematic block diagram of the thermal storage type hot water apparatus 1 in the 1st Embodiment of this invention.

  In FIG. 1, a hot water storage tank 31 that stores high-temperature water heated by a heating device 33 (for example, an electric heater) is housed in a housing of the hot water storage tank unit 3. And the heat storage unit 2 which accommodates the latent heat storage tank 21 in a housing | casing is installed in the upper surface of the hot water storage tank unit 3, ie, the top | upper surface of the housing | casing of the hot water storage tank unit 3. FIG.

  The outer surface of the latent heat storage tank 21 is covered with a heat insulating material 22 for the latent heat storage tank, and the hot water storage tank 31 is covered with a heat insulating material 32 for the hot water storage tank. A latent heat storage material 21 is sealed in the latent heat storage tank 21. For example, organic substances such as paraffin and sugar alcohol, hydrated salts such as sodium acetate trihydrate, and composites thereof are used.

  At this time, the thermal resistance R1 including from the upper surface of the latent heat storage tank 21 to the member forming the housing of the heat storage unit 2 facing the upper surface of the latent heat storage tank 21 is from the lower surface of the latent heat storage tank 21 to the ceiling of the hot water storage tank 31. It is comprised so that it may become larger than the thermal resistance R2 including the member which forms a surface.

  When the thermal resistance is R, the thermal conductivity is K, and the thickness is L, the value of the thermal resistance R can be expressed as R = L / K. By adjusting the thermal conductivity K and the thickness L as appropriate, the thermal resistance R can be set to a desired value.

  As the heat insulating material 22 for the latent heat storage tank and the heat insulating material 32 for the hot water storage tank, a foamed resin such as foamed polystyrene, a fiber material such as glass wool and graph fiber, or a vacuum heat insulating material can be used in addition to the foamed polypropylene. These heat insulating materials can be used alone or in combination, and an air layer can be formed between the heat insulating materials so that the thermal resistance R can be set to a desired value.

  In addition, the heat insulating material 22 for the latent heat storage tank is formed of a heat insulating material that is divided into an upper side and a lower side, and the heat insulating material 22a for the upper side latent heat storage tank that covers the latent heat storage tank 21 from the upper side. The thermal resistance is formed so as to be larger than the thermal resistance of the lower-side latent heat storage tank heat insulating material 22b that covers the latent heat storage tank 21 of the latent heat storage tank heat insulating material 22 from the lower side.

  That is, the heat insulating material 22 for the latent heat storage tank is formed from the upper and lower divided heat insulating materials, and the heat insulating material 22a for the upper latent heat storage tank and the heat insulating material 22b for the lower latent heat storage tank are formed from the same material. The above conditions can be satisfied by forming the thickness of the heat insulating material 22a for the latent heat storage tank thicker than the thickness of the heat insulating material 22b for the lower side latent heat storage tank.

  Moreover, even if it is the same thickness, the thermal conductivity K of the upper-side latent heat storage tank thermal insulation 22a is formed using a material smaller than the thermal conductivity K of the lower-side latent heat storage tank thermal insulation 22b. Can be satisfied.

  Incidentally, the thermal resistance R1 can be adjusted by combining the thermal resistance of the upper-side latent heat storage tank heat insulating material 22a and the thermal resistance of the metal plate forming the housing of the thermal storage unit 2.

  Further, the thermal resistance R2 includes the thermal resistance of the lower-side latent heat storage tank insulation 22b, the thermal resistance of the metal plate that forms the casing of the thermal storage unit 2, and the metal plate that forms the casing of the hot water storage tank unit 3. The thermal resistance, the thermal resistance of the hot water storage tank insulating material 32, and the thermal resistance of the metal plate forming the hot water storage tank 31 can be adjusted together.

  However, since the thermal resistance of the metal plate is extremely small compared to the thermal resistance of the heat insulating material, the level is almost negligible.

  Below the hot water storage tank 31, a tank water intake pipe 41 through which low temperature water flows into the hot water storage tank 31 is provided. In addition, a tank outlet pipe 42 through which water flows out of the hot water storage tank 31 is provided at the upper part of the hot water storage tank 31. Further, a heating device 33 (for example, an electric heater) is provided below the hot water storage tank 31.

  On the outer surface of the hot water storage tank 31, a hot water storage tank upper temperature thermistor 34a, a hot water storage tank middle temperature thermistor 34b, and a hot water storage tank lower temperature thermistor 34c, which are a plurality of temperature thermistors for detecting the temperature of the water in the hot water storage tank 31, They are arranged in order from the highest. Further, a latent heat storage tank temperature thermistor 23 that detects the temperature of the latent heat storage tank 21 is provided. Moreover, the heat storage type hot water apparatus 1 has a control device (not shown) that controls the operation of the functional components provided in the heat storage type hot water apparatus 1.

  The hot water storage tank 31 heats the low temperature water that has entered the lower portion of the hot water storage tank 31 from the tank water inlet pipe 41 with a heating device 33 (for example, an electric heater), and stores the hot water generated by heating in the hot water storage tank 31. It is a temperature stratification type, and is configured to discharge hot water from a tank outlet pipe 42 provided in the upper part of the hot water storage tank 31.

  Further, a heat storage water intake pipe 43 is provided on the upstream side of the latent heat storage tank 21, and a heat storage water discharge pipe 44 is provided on the downstream side of the latent heat storage tank 21. A first switching device 5 a is provided between the tank water discharge pipe 42 and the heat storage water input pipe 43, and a second switching device 5 b is provided in the middle of the heat storage water discharge pipe 44.

  The heat storage outlet pipe 44 is connected to the lower part of the hot water storage tank 31, and a transfer device 47 is disposed between the second switching device 5 b and the lower part of the hot water storage tank 31. Moreover, the 1st switching device 5a and the 2nd switching device 5b are connected by piping, and the 2nd switching device 5b is connected with the one end side of the hot water pipe 45, and the other end of the hot water pipe 45 The side is connected to the hot water supply terminal 46. The first switching device 5a and the second switching device 5b are three-way valves.

  About the heat storage type hot water apparatus 1 comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  As shown in FIG. 1, the heat storage unit 2 that stores the latent heat storage tank 21 in the casing is arranged on the top surface of the casing of the hot water storage tank unit 3 that stores a hot water storage tank 31 that forms temperature stratification. It is installed.

  With this configuration, since the temperature difference between the lower surface of the latent heat storage tank 21 and the upper surface of the hot water storage tank 31 that is a temperature stratification type is small, the amount of heat transfer between the latent heat storage tank 21 and the hot water storage tank 31 is reduced. The increase in the amount of electric power accompanying the heating of the latent heat storage tank 21 can be suppressed.

  Moreover, since R2 <R1, the heat radiation from the latent heat storage tank 21 to the outside air side of the heat storage unit 2 can be suppressed, and the temperature of the latent heat storage tank 21 becomes lower than the temperature of the hot water storage tank 31, and the hot water storage tank 31 side. Since the heat storage performance to the latent heat storage tank 21 of the moved heat can be improved even when the heat moves from the heat to the latent heat storage tank 21 side, a decrease in energy efficiency can be suppressed.

  In addition, since the heat storage type hot water apparatus 1 is installed indoors or outdoors and is used for hot water supply, heating, a bath, etc., the heat storage unit 2 is in contact with ambient air outside the housing (for example, 20 ° C.). . For this reason, the heat storage unit 2 storing the latent heat storage tank 21 (for example, 60 ° C.) in the housing is cooled by a temperature difference from the outside air, and the temperature of the latent heat storage tank 21 decreases with the passage of time.

  FIG. 2 is a temperature distribution diagram of the heat storage type hot water apparatus 1. The temperature of the hot water in the hot water storage tank 31 is Ti (for example, 60 ° C.), and the temperature of the outside air is To (for example, 20 ° C.).

  As shown in FIG. 2A, in the case of R2> R1, that is, the thermal resistance R1 including from the upper surface of the latent heat storage tank 21 to the member forming the housing of the heat storage unit 2 facing the upper surface of the latent heat storage tank 21 is When the thermal resistance R2 is smaller than the lower surface of the latent heat storage tank 21 to the member that forms the top surface of the hot water storage tank 31, the heat held in the latent heat storage tank 21 is outside air around the heat storage unit 2. Due to the structure that is easily moved to the side, the latent heat storage tank 21 is cooled by the temperature difference between the latent heat storage tank 21 and the outside air, and the temperature of the latent heat storage tank 21 decreases from Ti to Tb with time.

  On the other hand, as shown in FIG. 2B, in the case of R2 <R1, that is, from the upper surface of the latent heat storage tank 21 to the members that form the casing of the heat storage unit 2 facing the upper surface of the latent heat storage tank 21. When the thermal resistance R1 is larger than the thermal resistance R2 including from the lower surface of the latent heat storage tank 21 to the member forming the top surface of the hot water storage tank 31, it is held in the latent heat storage tank 21 as compared to the case of R2> R1. Since the heat that is present is difficult to move to the outside air around the heat storage unit 2, even when the heat storage unit 2 is cooled by the outside air, the temperature drop of the latent heat storage tank 21 is suppressed, and the latent heat decreased. The temperature of the heat storage tank 21 is Ta (> Tb).

  As described above, in the present embodiment, the heat storage unit 2 and the heat storage unit 2 that stores the latent heat storage tank 21 in the housing are the hot water storage tanks that store the hot water storage tank 31 forming the temperature stratification in the housing. A thermal resistance R1 that is disposed on the top surface of the housing of the unit 3 and includes a member that forms the housing of the heat storage unit 2 that faces the upper surface of the latent heat storage tank 21 from the upper surface of the latent heat storage tank 21 has latent heat. By making it the structure larger than thermal resistance R2 including the member which forms the top | upper surface of the hot water storage tank 31 from the lower surface of the thermal storage tank 21, the lower surface of the latent heat storage tank 21 and the upper surface of the hot water storage tank 31 which is a temperature stratification type, , And the amount of heat transfer between the latent heat storage tank 21 and the hot water storage tank 31 can be reduced, so that an increase in the amount of electric power accompanying heating of the latent heat storage tank 21 can be suppressed.

  Furthermore, heat radiation from the latent heat storage tank 21 to the outside air side of the heat storage unit 2 can be suppressed, and the temperature of the latent heat storage tank 21 becomes lower than the temperature of the hot water storage tank 31, and the latent heat storage tank 21 side from the hot water storage tank 31 side. Even when the heat has moved, since the heat storage performance of the moved heat to the latent heat storage tank 21 can be improved, a decrease in energy efficiency can be suppressed.

  FIG. 3 is a schematic explanatory diagram when high-temperature water is discharged from only the tank outlet pipe 42 of the heat storage type hot water apparatus 1 according to Embodiment 1 of the present invention.

  When the detected temperature of the hot water storage tank lower temperature thermistor 34c disposed at the lowest position among the plurality of temperature thermistors is equal to or higher than a predetermined temperature, the hot water is sufficiently stored in the hot water storage tank 31. Hot water is discharged only from the tank outlet pipe 42.

  When hot water is discharged only from the tank outlet pipe 42, the tank outlet pipe 42 provided in the upper part of the hot water storage tank 31 is communicated with the heat storage inlet pipe 43 provided on the downstream side of the latent heat storage tank 21. Instead, the control device (not shown) switches the flow direction of the first switching device 5a and the second switching device 5b so that the tank water discharge pipe 42 is in direct communication with only the hot water discharge pipe 45.

  Thereby, the hot water in the hot water storage tank 31 is discharged from the hot water supply terminal 46 via the tank outlet pipe 42, the first switching device 5 a, the second switching device 5 b, and the hot water pipe 45. At this time, since the high temperature water in the hot water storage tank 31 decreases, the low temperature water enters the lower part of the hot water storage tank 31 from the tank water inlet pipe 41.

  FIG. 4 is a schematic explanatory diagram when high-temperature water is discharged from the heat storage water discharge pipe 44 through the heat storage unit 2 from the tank water discharge pipe 42 of the heat storage type hot water apparatus 1 according to Embodiment 1 of the present invention.

  When the detected temperature of the hot water storage tank upper temperature thermistor 34a disposed at the highest position among the plurality of temperature thermistors is not more than a predetermined temperature, the hot water is not sufficiently stored in the hot water storage tank 31, The hot or cold water flowing out from the tank outlet pipe 42 is heated in the latent heat storage tank 21 to generate hot water, and then hot water is discharged from the hot water supply terminal 46 via the hot water outlet pipe 45.

  In this case, the first switching device 5a is arranged so that the tank outlet pipe 42 provided in the upper part of the hot water storage tank 31 communicates only with the heat storage water inlet pipe 43 provided on the downstream side of the latent heat storage tank 21. A control device (not shown) switches the flow path direction.

  The high-temperature water heated and generated in the latent heat storage tank 21 flows through the heat storage water discharge pipe 44, and the flow direction of the second switching device 5b is controlled by a control device (not shown) so that the high-temperature water flows through the hot water discharge pipe 45. The hot water is discharged from the hot water supply terminal 46.

  FIG. 5 is a schematic explanatory diagram for storing heat in the latent heat storage tank 21 of the heat storage type hot water apparatus 1 according to Embodiment 1 of the present invention.

  When the detected temperature of the latent heat storage tank temperature thermistor 23 for detecting the temperature of the latent heat storage tank 21 is equal to or lower than a predetermined temperature, the water in the hot water storage tank 31 is stored in a plurality of temperature thermistors in order to store the latent heat storage tank 21. Among them, the hot water storage tank upper temperature thermistor 34a disposed at the highest position is heated by a heating device 33 (for example, an electric heater) so that the temperature detected by the thermistor 34a is equal to or higher than a predetermined temperature. Store in the hot water storage tank 31.

  And the flow path of the 1st switching device 5a is connected so that the tank outlet pipe 42 provided in the upper part of the hot water storage tank 31 may communicate directly only with the heat storage water intake pipe 43 provided in the downstream of the latent heat storage tank 21. The flow direction of the second switching device 5b is controlled by a control device (not shown) so that the direction is switched by a control device (not shown) and the heat storage outlet pipe 44 is in direct communication with only the lower part of the hot water storage tank 31. Switches.

  And a control apparatus (not shown) drives the conveyance apparatus 47, whereby the high temperature water in the hot water storage tank 31 flows through the tank outlet pipe 42 and the heat storage water inlet pipe 43 to form the latent heat storage tank 21. The material is heated, and the low-temperature water after heat radiation by the heating of the latent heat storage material returns to the lower part of the hot water storage tank 31 through the heat storage outlet pipe 44. Thus, the latent heat storage tank 21 is stored.

  By the above, in the thermal storage type hot water apparatus 1 provided with the latent heat storage tank 21 and the hot water storage tank 31, the increase in the electric energy accompanying the heating of the latent heat storage tank 21 and a reduction in energy efficiency are suppressed, and the usability is high. A heat storage type hot water apparatus can be provided.

  As described above, the heat storage type hot water device according to the present invention can be applied to the use of hot water in hot water supply, heating, bath, and the like because it can improve energy efficiency by using a latent heat storage tank and a hot water storage tank in combination.

DESCRIPTION OF SYMBOLS 1 Thermal storage type hot water apparatus 2 Thermal storage unit 3 Hot water storage tank unit 5a 1st switching apparatus 5b 2nd switching apparatus 21 Latent heat storage tank 22 Insulation material for latent heat storage tank 22a Thermal insulation material for upper side latent heat storage tank 22b Thermal insulation for lower side latent heat storage tank Materials 23 Latent heat storage tank temperature thermistor 31 Hot water storage tank 32 Thermal insulation material for hot water storage tank 33 Heating device 34a Hot water storage tank upper temperature thermistor 34b Hot water storage tank middle temperature thermistor 34c Hot water storage tank lower temperature thermistor 41 Tank inlet pipe 42 Tank outlet pipe 43 Heat storage inlet pipe 44 Heat storage outlet pipe 45 Hot water outlet pipe 46 Hot water supply terminal 47 Conveying device

Claims (3)

A temperature-stratified hot water storage tank for storing hot water heated by a heating device;
A hot water storage tank unit in which the hot water storage tank is disposed in a housing;
A latent heat storage tank,
A heat storage unit in which the latent heat storage tank is disposed in a housing;
With
The heat storage unit is installed on the upper surface of the casing of the hot water storage tank unit and includes from the upper surface of the latent heat storage tank to a member that forms the casing of the heat storage unit facing the upper surface of the latent heat storage tank. Thermal resistance R1 is
A regenerative hot water apparatus having a thermal resistance R2 that is greater than a thermal resistance R2 including from a lower surface of the latent heat storage tank to a member that forms a top surface of the hot water storage tank. The heat resistance of the part which is provided with the heat insulating material for the latent heat storage tank covering the latent heat storage tank, and covers the latent heat storage tank from the upper side of the heat insulating material for the latent heat storage tank is the latent heat storage tank of the heat insulating material for the latent heat storage tank. The heat storage type hot water apparatus according to claim 1, wherein the heat resistance is larger than a thermal resistance of a part covering the lower side from the lower side. A heat storage water intake pipe for entering the latent heat storage tank; and a tank water discharge pipe for discharging the water stored in the hot water storage tank. The heat storage water intake pipe and the tank water discharge pipe are connected via a switching device. The heat storage type hot water apparatus according to claim 1 or 2.

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