JP2012237529A - Water heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water heater that can supply an inorganic compound or the like and is compact in size and low in running cost without an electric circuit.SOLUTION: The water heater includes: a hot water supply channel 39 from which hot water is supplied; a melting device 16 which melts the inorganic compound 11 in the hot water; a branch circuit 15 which is formed so that the hot water from the hot water supply channel 39 is diverted; a flow passage resistor 50 which is formed in the hot water supply channel 39 where the melting device 16 is disposed at the branch circuit 15 and the hot water from the branch circuit 15 is returned to a position in a range within a length shorter than a flow path diameter of the hot water supply channel 39 from a downward side end of the flow passage resistor 50.

Description

  The present invention relates to a hot water supply apparatus having a function of supplying an inorganic compound or the like to hot water.

  Conventionally, this type of apparatus dissolves a material containing a target component in water by electrolysis, and supplies the dissolved water to a target circuit (for example, see Patent Document 1).

  FIG. 10 shows a conventional hot water supply apparatus described in Patent Document 1. As shown in FIG. As shown in FIG. 10, it is composed of a zinc anode 1, a cathode 2, a casing 5, and a DC power source 9.

JP 2004-190882 A

  However, in the above-described conventional configuration, the method of dissolving the target component (zinc anode 1) in water is based on the principle of electrolysis, and therefore, the DC power source 9 and insulation for preventing leakage to water flowing in the circuit. A circuit (not shown) is required. Therefore, along with the increase in the size and cost of the apparatus, the DC power supply 9 requires power, so that the amount of power consumption increases.

  An object of the present invention is to solve the above-described conventional problems, and to provide a hot water supply apparatus that does not require an electric circuit and that can supply an inorganic compound or the like in a compact and low running cost.

  In order to solve the above-described conventional problems, a hot water supply apparatus of the present invention includes a pouring path for pouring hot water, a melting apparatus for dissolving an inorganic compound in the hot water, and diverting hot water from the pouring path. And the flow path resistance formed in the pouring path, the melting device is disposed in the branch circuit, and the flow of the pouring path from the downstream end of the flow path resistance. The hot water from the branch circuit is returned to a position having a length within the path diameter.

  As a result, the required flow rate can be distributed to the branch circuit with a smaller flow path resistance by making maximum use of the static pressure drop due to the jet phenomenon near the outlet of the flow path resistance.

  In addition, with the fluidization effect, it is possible to efficiently dissolve inorganic compounds in water by the principle of substance diffusion (Fick's law), in which substances move due to the difference in dissolution concentration between water and inorganic compounds. By reducing the power supply circuit and the insulation circuit that have been required so far, it is possible to reduce the size and cost, and to reduce power consumption because it is a principle that does not require power.

  According to the present invention, it is possible to provide a hot water supply apparatus that does not require an electric circuit and can supply an inorganic compound or the like at a compact and low running cost.

Configuration diagram of dissolution apparatus in Embodiment 1 of the present invention (A) Configuration diagram of orifice throttle mechanism (b) Configuration diagram of venturi throttle mechanism (A) Configuration diagram of channel resistance in Embodiment 1 of the present invention (b) Configuration diagram of other channel resistance (c) Diagram showing relationship between channel resistance and flow rate Detailed view of channel resistance in Embodiment 1 of the present invention Detailed view of dissolution apparatus in Embodiment 1 of the present invention The figure which shows the relationship between the inorganic compound of the dissolution apparatus in Embodiment 1 of this invention, and a filtration means (A) Configuration diagram of filtering means in Embodiment 1 of the present invention (b) Configuration diagram of other filtering means (c) Configuration diagram of other filtering means The block diagram of the hot-water supply apparatus in Embodiment 2 of this invention Configuration diagram of dissolution apparatus in Embodiment 3 of the present invention Configuration diagram of conventional hot water supply equipment

  The first invention includes a pouring path for pouring hot water, a melting device for dissolving an inorganic compound in the hot water, a branch circuit formed to divert hot water from the pouring path, and the pouring path The melting device is disposed in the branch circuit, and the branch is provided at a position within a flow path diameter of the pouring path from the downstream end of the flow path resistance. The hot water supply apparatus is characterized in that hot water from a circuit is returned.

  As a result, the required flow rate can be distributed to the branch circuit with a smaller flow path resistance by making maximum use of the static pressure drop due to the jet phenomenon near the outlet of the flow path resistance.

  In addition, with the fluidization effect, it is possible to efficiently dissolve inorganic compounds in water by the principle of substance diffusion (Fick's law), in which substances move due to the difference in dissolution concentration between water and inorganic compounds. By reducing the power supply circuit and the insulation circuit that have been required so far, it is possible to reduce the size and cost, and to reduce power consumption because it is a principle that does not require power.

  2nd invention is a hot water supply apparatus provided with the pouring valve which opens and closes the said pouring path | route, and has arrange | positioned the said melt | dissolution apparatus in the downstream of the said pouring valve. Since it is not affected by the water hammer phenomenon (water pressure rise in the bathtub water pouring route or the like) that occurs when hot water is stopped, the pressure-resistant structure of the melting device can be simplified. Furthermore, since the water flow of the hot water to the bathtub is used, the water in which the inorganic compound is dissolved can be supplied to the bathtub at the same time as the hot water, thereby improving convenience.

  According to a third aspect of the present invention, there is provided a hot water supply apparatus characterized in that the dissolution apparatus includes a storage means for storing the inorganic compound, and an equivalent diameter of the storage means is larger than an equivalent diameter of the pouring path. Can reduce the increase in pressure loss that occurs when passing through the inorganic compound container, and the hot water filling to the bathtub can be completed quickly.

  According to a fourth aspect of the present invention, there is provided a hot water supply apparatus in which the melting device is disposed in a main body housing, and even in a low outside air temperature, a slight heat radiation from a hot water storage tank, a power circuit, etc. Since the atmosphere is always heated, heat insulation such as prevention of freezing of the melting apparatus is simplified or unnecessary.

  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 is a structural diagram of a melting apparatus according to the first embodiment of the present invention.

  In FIG. 1, the branch circuit 15 includes the inorganic compound container 12 as a part of the circuit so as to be in parallel with the bathtub water pouring path 39 between the branching portion 51 and the junction 52 of the bath water pouring path 39. ing. The flow path resistance 50 is configured between the branch portion 51 and the junction portion 52 on the bathtub water pouring passage 39 as a throttle mechanism having an equivalent diameter smaller than that of the bathtub water pouring passage 39.

  The inorganic compound 11 is in the form of powder, granules, or a mixture of powder and granules, and is stored in the inorganic compound storage container 12. The said inorganic compound storage container 12 is made into the shape expanded in general mortar shape along the water flow direction.

  The inorganic compound 11 is soluble in water. The inorganic compound 11 in FIG. 1 is in the form of granules having different diameters, and when this is configured to be multilayered, a porous space is formed in the inorganic compound storage container 12. The filtering means 13 has a plurality of small holes and is stored in the end portion of the inorganic compound storage container 12. The inorganic compound storage container 12 and the filtering means 13 are sequentially communicated by a branch circuit 15, and the dissolution apparatus 16 is configured so that the inorganic compound storage container 12 is on the upstream side of the filtering means 13.

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

  The water flowing through the bathtub water pouring channel 39 is distributed from the branch part 51 to the branch circuit 15 by the flow path resistance 50. The distributed water flow rate includes the flow rate of water flowing through the bathtub water pouring channel 39 upstream of the branching unit 51, the flow resistance of the bathtub water pouring channel 39 between the branching unit 51 and the junction 52, and the branch circuit 15. It is related to the ratio of flow resistance. The channel resistance 50 adjusts the channel resistance ratio between the bathtub water pouring channel 39 and the branch circuit 15 as a throttle mechanism having an equivalent diameter smaller than the equivalent diameter of the bath water pouring channel 39.

  FIG. 2 is a diagram illustrating a configuration of a general diaphragm mechanism. (A) shows the details of a general orifice throttle mechanism. (B) shows the details of a general venturi throttle mechanism.

  (A) also shows the pressure change in the pipe, and shows the state of pressure changing from the upstream (left) to the downstream of the flow. The pressure in the pipe once rises immediately before approaching the orifice.

  In general, the flow of fluid in the case of a liquid is peeled off from the pipe wall at a distance of about D upstream of the orifice plate and continues to contract after passing through the orifice plate, and the flow cross-sectional area around the downstream D / 2 of the orifice plate is It becomes a jet state with the contraction phenomenon that becomes the minimum.

  In the jet region, the cross-sectional area of the flow path is reduced, the flow velocity is increased, and the downstream static pressure is reduced. There are also many vortices between the jet and the tube wall. This vortex extends to the downstream of the orifice until it becomes the same as the inner diameter of the pipe, but becomes the original pipe flow approximately 5D downstream. The energy consumed in this vortex becomes a permanent pressure loss of the fluid and does not recover to the original pressure. Thus, the pressure which does not recover | recover finally becomes a permanent pressure loss by an orifice.

  FIG. 3 is a configuration diagram of the channel resistance 50 in the present embodiment, a configuration diagram of another channel resistance, and a relationship between the pressure and the flow rate. (A) is the block diagram of the flow-path resistance 50 in this Embodiment, (b) is a block diagram of another flow-path resistance, (c) is a figure which shows the relationship between those pressures and flow volume.

In FIG. 3A, the flow path resistance 50 in the present embodiment is substantially the same as the venturi mechanism with a relatively small permanent pressure loss at the inlet portion of the throttle mechanism, and the outlet portion is substantially equivalent to the orifice orifice shape. As a result, there is no contraction phenomenon as in the orifice mechanism, but a jet state near the outlet portion occurs to some extent. That is, it is possible to obtain a considerable static pressure lowering phenomenon in the vicinity of the merging portion 52 downstream.

  FIG. 4 is a diagram illustrating a positional relationship between the outlet end portion of the flow path resistance 50 and the merging portion 52 in the present embodiment. In FIG. 4, the dimension A indicating the position of the merging portion 52 from the outlet end of the channel resistance 50 is configured to have a relationship of A ≦ φd with respect to φd indicating the channel diameter of the bathtub water pouring path 39.

  That is, the junction 52 is provided within the flow path diameter of the bathtub water pouring channel 39 from the outlet end of the flow resistance 50. As a result, the static pressure drop due to the jet phenomenon in the vicinity of the outlet of the flow path resistance 50 can be utilized to the maximum, and the pressure difference between the branch part 51 and the junction part 52 in the branch circuit 15 can be further expanded. .

  In FIG. 3B, the shape of the flow path resistance different from that of the present embodiment is the same shape as the flow path resistance 50 in the present embodiment, but the flow path resistance 50 in the present embodiment with respect to the flow direction. It is comprised in the shape which reversed the shape of.

  The entrance portion has a generally orifice shape, a branch portion 51 is formed slightly upstream, the exit portion has a venturi shape, and the merge portion 52 is formed downstream of the venturi shape portion. Therefore, the jet phenomenon in the vicinity of the merging portion 52 does not occur, and the static pressure drop due to this hardly occurs.

  The flow characteristic curve of the branch circuit flow rate (a) shown in FIG. 3C is based on the flow path resistance 50 in the present embodiment shown in FIG. 3A, and the branch circuit flow rate (b). Is due to another flow path resistance shown in FIG. As shown in FIG. 3 (c), it can be seen that the distribution flow rate due to the channel resistance 50 in the present embodiment shown in FIG. 3 (a) is larger under the same pressure condition.

  Due to the flow path resistance 50 in the present embodiment, the pressure difference between the branch portion 51 and the junction portion 52 is enlarged, and the distribution flow rate distributed to the branch circuit 15 is increased. This means that the required flow rate to be distributed to the branch circuit 15 can distribute the same required flow rate even if the flow path resistance 50 according to this embodiment is considerably larger than the other flow path resistance. Yes.

  That is, even if the pressure loss due to the channel resistance 50 on the bathtub water pouring path 39 is reduced, an equivalent required flow rate can be secured, and the pouring flow rate due to the channel resistance 50 in the bath water pouring path 39 is reduced. An adverse effect can be further suppressed.

  The water diverted from the branch part 51 by the flow path resistance 50 according to the present embodiment flows into the inorganic compound storage container 12 through the internal water pipe 14 and as an ascending water flow facing the direction of gravity, the inorganic compound storage container 12. It passes through the porous space formed in the.

  When the flow rate of the ascending water flow is constant, the inorganic compound 11 is in a granular form having different diameters, so that the flow rate is increased by the ascending water flow in a state of being distributed from the largest to the smallest in diameter from the bottom. Fluidized with running water by water pressure according to

  Since the inorganic compound storage container 12 has a generally mortar-shaped shape along the water flow direction, the flow rate increases in the upstream in the inorganic compound storage container 12, and the water flow rate decreases along the water flow direction. Distribution becomes configurable.

On the other hand, the distribution of the granule diameter is affected by gravity according to the mass, and the larger the granule diameter, the more upstream. From this, it becomes possible to make the water flow rate act in proportion to the size of the granule diameter, and a uniform and efficient fluidization phenomenon becomes possible regardless of the size of the granule diameter of the inorganic compound 11.

  Since water has viscosity, a velocity boundary layer is generated in the region from the surface of the inorganic compound 11 to the vicinity of the surface when passing through the porous space of flowing water and fluidized granules. FIG. 5 is a diagram showing the state of the velocity boundary layer. The flow velocity in the velocity boundary layer near the surface of the inorganic compound 11 is small, and the flow velocity passing through the center of the porous space has a large distribution.

  Since the inorganic compound 11 is soluble in water, 11 surface molecules near the surface of the inorganic compound 11 are dissolved in water near the surface, and the dissolution concentration of water increases. Since the water near the surface has a low flow rate, the dissolved concentration has a high value.

  On the other hand, the dissolved concentration of water flowing in the center of the porous space having a high flow rate is low. At this time, if there is a difference in the concentration of the inorganic compound dissolved in water, the lower substance moves from the higher one according to the concentration difference (Fick's law), so the inorganic compound dissolved in the water near the surface Move to low center water.

  By utilizing the principle of substance diffusion while increasing the concentration difference between the vicinity of the surface of the inorganic compound 11 and the flowing water in the center of the porous space having a large flow velocity due to the stirring effect due to the fluidization phenomenon, the inorganic compound 11 is It can be dissolved in water in the porous space more efficiently.

  The filtering means 13 prevents the granules of the inorganic compound 11 from flowing out of the inorganic compound storage container 12 due to the water flow in the inorganic compound storage container 12.

  As described above, in the present embodiment, it is possible to make maximum use of the static pressure drop due to the jet phenomenon near the outlet portion of the flow path resistance 50, and the required flow rate to the branch circuit due to the smaller flow path resistance. Therefore, it is possible to configure a dissolution apparatus with flow path resistance at a simple and low cost, improving the convenience of the user, and accompanied by a stirring effect due to a uniform and efficient fluidization phenomenon, Based on the principle of substance diffusion (Fick's law) in which a substance moves due to a difference in dissolution concentration between water and an inorganic compound, the inorganic compound can be more efficiently dissolved in water.

  Therefore, since the power supply circuit and the insulation circuit which have been required so far can be reduced, it is possible to provide a hot water supply apparatus that is compact and low in cost, and further reduces power consumption.

  In addition, when the inorganic compound is a zinc compound containing zinc (such as zinc oxide or zinc carbonate), the following effects can be obtained. Zinc is one of the essential elements of humans with relatively large demands, and is easily deficient when supplied from a normal diet. It is an element added to foods for the purpose of enhancing nutrition. On the other hand, the nutrition enhancement by percutaneous absorption can be performed during bathing by supplying water in which zinc is dissolved in the bathtub.

  FIG. 6 is an example showing the relationship between the dimensions of the inorganic compound 11 and the filtering means 13 in the dissolving apparatus. In FIG. 3, the filtering means 13 is composed of a plurality of small holes 13a, 13b, 13c having different diameters.

  FIG. 7 is a configuration diagram of the filtering means 13. (A) forms a square-shaped small hole with a linear fiber. (B) is a plate having a predetermined thickness and small holes having a plurality of types of diameters. (C) forms a porous space by using a granular non-dissolving material as a multilayer.

  In any case, when the granules of the inorganic compound 11 are about to flow out of the inorganic compound storage container 12 due to the water flow in the inorganic compound storage container 12, this is prevented, but the configuration and shape are not limited thereto.

  The dissolution concentration flowing out of the dissolution apparatus 16 is determined by the flow rate of water passing through the inorganic compound storage container 12, the surface area of the inorganic compound 11 in contact with water, and the like. When the dissolution concentration of the dissolution apparatus 16 is set to a predetermined value, the total surface area of the inorganic compound 11 needs to be within a certain range, so the particle size of the inorganic compound 11 stored in the inorganic compound storage container 12 of FIG. It is necessary to use the one selected for the size within the range.

  Since the selection causes a cost increase, among the inorganic compounds 11 having a plurality of diameters, the diameter D2 of the small hole 13a of the filtering means 13 is D2 <with respect to the maximum particle diameter D1 of the inorganic compound 11. In the case of D1, the following effects can be obtained.

  The inorganic compound 11 having a particle size less than D2 flows out from the small holes 13a, 13b, and 13c. In the initial stage of use, those having a small particle size flow out of the melting device 16, but after a predetermined time has passed, the inorganic compound 11 having a particle size of D2 or more continues to be stored in the inorganic compound storage container 12.

  When this state is formed, it is equivalent to selecting the particle size of the inorganic compound 11 to a size within a certain range. Therefore, even if the inorganic compound 11 in which the sizes are mixed is used, the target concentration is dissolved in water.

(Embodiment 2)
FIG. 8 shows a block diagram of a hot water supply apparatus according to the second embodiment of the present invention.

  In FIG. 8, a heat pump unit 21 is configured by connecting a compressor 22, a hot water supply heat exchanger 23, a decompression unit 24, and an evaporator 25 in an annular manner in order by a refrigerant circuit 26. Water is stored in a hot water storage tank 28 of the hot water storage unit 27, and a hot water discharge circuit 30 is a circuit that connects the hot water storage tank 28, a hot water supply pump 29, a hot water supply heat exchanger 23, and a hot water storage tank 28 in this order. The bathtub water heating circuit 35 is a circuit that connects the hot water storage tank 28, the bath heat exchanger 33, the bathtub water heating pump 34, and the hot water storage tank 28 in order, and the bathtub 42 is connected to the other circuit of the bath heat exchanger 33. ing.

  The bathtub water circulation circuit 41 is a circuit which connects the bathtub 42, the bathtub water pump 40 which conveys bathtub water, and the bath heat exchanger 33 in order. The bathtub water pouring path 39 is a circuit for pouring the water in the hot water storage tank 28 to the bathtub 42 via the bathtub water circulation circuit 41. This circuit includes a bathtub water mixing valve 36 that mixes hot water in the hot water storage tank 28 and tap water, temperature detection means 37 that detects the temperature of the water to be poured, and bathtub water injection that opens and closes the circuit of the bathtub water pouring path 39. The hot water valve 38 is provided in order. The melting device 16 was provided in the bathtub water pouring path 39 on the downstream side of the bathtub water pouring valve 38 so as to be housed in the casing of the main body.

  The operation of heating the water stored in the hot water storage tank 28 by the heat pump unit 21 is as follows. The water in the hot water storage tank 28 is conveyed to the hot water supply heat exchanger 23 by the hot water supply water pump 29 and heated by the heat pump cycle operation. The hot water supply pump 29 controls the flow rate of the hot water supply circuit 30 so that the temperature of the hot water heated by the hot water supply heat exchanger 23 becomes a predetermined temperature.

The filling of the bathtub 42 and the heating of the bathtub water are as follows. The bathtub water mixing valve 36 of the bathtub water pouring path 39 has a hot water and tap water so that the pouring temperature detected by the temperature detecting means 37 becomes a temperature preset by a remote controller or the like (not shown). Adjust the mixing ratio. The bathtub water having a predetermined temperature flows out into the bathtub 42 through the bathtub water pouring path 39 and the bathtub water circulation circuit 41 in this order.

  On the other hand, when the bathtub water in the bathtub 42 is heated, the hot water stored in the hot water storage tank 28 is conveyed to the bath heat exchanger 33 by the bathtub water heating pump 34, and the bathtub water conveyed from the bathtub water pump 18. Heat. Hot-water supply water whose temperature has been lowered by heating the bath water in the bath heat exchanger 33 flows into the interior from the lower part of the hot water storage tank 28.

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

  When the user hot waters the bathtub 42, the remote controller or the like performs a hot water operation instruction operation. After the remote control operation, when the water adjusted by the bathtub water mixing valve 36 at a preset temperature controls the bathtub water pouring valve 38 from closed to open, it passes through the melting device 16 and the bathtub water circulation circuit 41. It flows out into the bathtub 42. When the water passes through the dissolving device 16, the inorganic compound dissolves in the water, so that the water in which the inorganic compound 11 is dissolved flows into the bathtub 42 simultaneously with the hot water operation in the bathtub 42.

  Although the melting device 16 is on the downstream side of the bathtub water pouring valve 38, when the bathtub water pouring valve 38 is controlled from opening to closing, a water hammer phenomenon occurs and is provided in the upstream circuit. The bathtub water mixing valve 36, the hot water storage tank 28, etc. give a water pressure load higher than the water pressure. By providing on the downstream side, the hydraulic load on the melting device 16 is not applied.

  As mentioned above, in this Embodiment, it was set as the hot-water supply apparatus provided with the bathtub water-pouring path | route, the bathtub water-pouring valve, and the bathtub water-pouring path | route in order of the bathtub water-pouring valve and the melting apparatus. Thereby, since the melting apparatus is not affected by the water hammer phenomenon (water pressure increase in the bathtub water pouring route or the like) that occurs when hot water to the bathtub is stopped, the pressure resistance structure of the melting apparatus can be simplified. Furthermore, since the water flow of the hot water to the bathtub is used, the water in which the inorganic compound is dissolved can be supplied to the bathtub at the same time as the hot water, thereby improving convenience.

  In the present invention, the melting device 16 is housed in the main body housing of the water heater and serves as the bathtub water pouring path 39, but even if it is provided in the bathtub water circulation circuit 41, water in which the inorganic compound 11 is dissolved is supplied to the bathtub 42. I can do it.

  Although it is possible to provide in the bathtub water circulation circuit 41 outside the main body casing, the atmospheric temperature inside the main body casing is reduced by heat radiation from the hot water storage tank 28 even at a low outside temperature. Is always heated, so that heat insulation such as prevention of freezing of the melting device 16 is unnecessary or simplified.

  Further, when the hot water heater is a hot water storage type hot water heater, high temperature hot water is stored in the hot water storage tank, so that the equipment can be sterilized and sterilized by supplying the hot water to the compound dissolving apparatus. Further, since the residual chlorine dissolved in the water is reduced during storage, the main body is not a corrosion-resistant material, and inexpensive general-purpose parts can be used.

(Embodiment 3)
FIG. 9 shows a structural diagram of a melting apparatus according to the third embodiment of the present invention.

  In FIG. 9, the inlet and outlet of the melting device 16 are connected to a bathtub water pouring channel 39. When the equivalent diameter d1 of the inorganic compound storage container 12 storing the inorganic compound 11 and the equivalent diameter d2 of the bathtub water pouring channel 39 are set, in FIG. 9, each is determined to have a size satisfying d1> d2.

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

  Since the inorganic compound storage container 12 storing the inorganic compound 11 and the filtering means 13 are provided for the branch circuit 15, pressure loss occurs when water passes through the dissolving device 16. When pressure loss occurs, the flow rate of water supplied to the bathtub 42 decreases.

  Here, if the equivalent diameter d1 of the inorganic compound storage container 12 is such that d1> d2 with respect to the equivalent diameter d2 of the bathtub water pouring path 39, the average flow velocity u1 of the inorganic compound storage container 12 is the bath water. It becomes smaller than the average flow velocity u2 of the pouring passage 39. Since the pressure loss of the fluid in the water circuit is proportional to the square of the average flow velocity of the fluid, an increase in the pressure loss when passing through the dissolving device 16 can be reduced.

  As mentioned above, in this Embodiment, the pressure by the water flow which passes an inorganic compound is made larger by making the equivalent diameter of an inorganic compound storage container larger than the equivalent diameter of the bathtub water pouring path which connects a dissolution device. Loss can be reduced and the hot water filling time for the bathtub can be completed quickly.

  As described above, the hot water supply apparatus according to the present invention leads to downsizing, cost reduction, and improvement in operating efficiency, and can be used for a hot water storage hot water heater and a gas heat source hot water heater.

DESCRIPTION OF SYMBOLS 11 Inorganic compound 12 Inorganic compound storage container 13 Filtration means 13a Small hole 13b Small hole 13c Small hole 14 Internal water pipe 15 Branch circuit 16 Dissolving device 21 Heat pump unit 27 Hot water storage unit 28 Hot water storage tank 36 Bath water mixing valve 37 Temperature detection means 38 Bath water pouring Valve 39 Bath water pouring path 42 Bath 50 Flow path resistance 51 Branching part 52 Junction part

Claims (4)

A pouring path for pouring hot water, a melting device for dissolving an inorganic compound in the hot water, a branch circuit formed to divert hot water from the pouring path, and a flow path resistance formed in the pouring path The melting device is disposed in the branch circuit, and the hot water from the branch circuit is returned to a position within the flow path diameter of the pouring path from the downstream end of the flow path resistance. A hot water supply device characterized in that it is configured to flow. The hot water supply apparatus according to claim 1, further comprising a pouring valve that opens and closes the pouring path, and the melting device is disposed downstream of the pouring valve. The hot water supply apparatus according to claim 1 or 2, wherein the melting apparatus includes a storage means for storing the inorganic compound, and an equivalent diameter of the storage means is larger than an equivalent diameter of the pouring path. The hot water supply device according to any one of claims 1 to 3, wherein the melting device is disposed in a main body casing.