JP2018130386A - Hot-water supply apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve at least one of a low noise, space-saving, and a reduction in maintenance, in a hot-water supply apparatus capable of mixing carbon dioxide into hot and cold water.SOLUTION: A hot-water supply apparatus 1A includes a gas-liquid mixing device 12 for mixing gas, which is supplied through a suction passage 13, into water, and a carbon dioxide generator 14 capable of supplying carbon dioxide into the suction passage 13. The carbon dioxide generator 14 comprises adsorption means for adsorbing the carbon dioxide in air, and heating means for heating the adsorption means so that the carbon dioxide adsorbed by the suction means can be emitted.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a hot water supply apparatus.

  2. Description of the Related Art There is known a hot water supply apparatus capable of obtaining hot water containing carbon dioxide, that is, carbon dioxide gas, which is effective for recovery from fatigue, reduction of muscle pain, heat retention, blood pressure reduction, and the like. The apparatus described in Patent Document 1 is configured as follows. The combustion apparatus exhaust gas or carbon dioxide in the atmosphere is adsorbed on an adsorbent such as zeolite. By operating the vacuum pump to reduce the pressure, carbon dioxide is released from the adsorbent, and the released carbon dioxide is mixed with hot water. Moreover, in the apparatus described in patent document 2, the carbon dioxide gas from a carbon dioxide cylinder is mixed in warm water with a carbon dioxide gas mixing apparatus.

JP-A-6-78963 Japanese Patent Laid-Open No. 5-23376

  Since the apparatus described in Patent Document 1 requires a decompression pump, there is a problem that the sound during pump operation is large, a problem that the size of the apparatus is large, and a problem that the cost is high. In the apparatus described in Patent Document 2, since the carbon dioxide gas cylinder needs to be replaced, there is a problem in that maintenance work is required.

  The present invention has been made to solve the above-described problems, and in a hot water supply apparatus capable of mixing carbon dioxide into hot water, at least one of low noise, space saving, and reduction of maintenance is provided. The goal is to achieve.

  A hot water supply apparatus according to the present invention includes a gas-liquid mixing device that mixes a gas supplied through an intake passage with water, and a carbon dioxide generator that can supply carbon dioxide into the intake passage. The carbon generator includes an adsorption unit that adsorbs carbon dioxide in the air, and a heating unit that heats the adsorption unit so that the carbon dioxide adsorbed by the adsorption unit is released.

  According to the present invention, it is possible to achieve at least one of low noise, space saving, and maintenance reduction in a hot water supply apparatus capable of mixing carbon dioxide into hot water.

It is a figure which shows the hot water supply apparatus by Embodiment 1. FIG. 2 is a longitudinal sectional view showing an example of a gas-liquid mixing apparatus in Embodiment 1. FIG. 3 is a flowchart showing an example of the operation of the hot water supply apparatus according to Embodiment 1. It is a figure which shows the hot water supply apparatus by Embodiment 2. FIG.

  Hereinafter, embodiments will be described with reference to the drawings. In the drawings, common or corresponding elements are denoted by the same reference numerals, and redundant description is simplified or omitted.

Embodiment 1 FIG.
FIG. 1 shows a hot water supply apparatus 1A according to the first embodiment. As shown in FIG. 1, a hot water supply apparatus 1A according to the first embodiment includes a hot water storage tank 2, a water supply adapter 3, a memorial circulation flow path 4, a hot water flow path 5, a control device 6, and a terminal device 7. In FIG. 1, illustration of a heating device that heats hot water stored in the hot water storage tank 2 is omitted. The heating device may be any device such as a heat pump method, an electric heater method, a method using solar heat, a combustion method, or a combination of a plurality of methods. In FIG. 1, the hot water storage tank 2 and the water supply adapter 3 are side views, the bathtub 10 is a schematic side sectional view, and the other configurations are schematic views.

  The water supply adapter 3 includes a main body 3a, a nozzle portion 3b, and an opening 3c. The bathtub 10 includes a first inner wall 10a and a bottom surface 10b. The water supply adapter 3 is installed so as to face the internal space of the bathtub 10 from the first inner wall 10 a of the bathtub 10. The nozzle portion 3b has a cylindrical shape protruding from the main body 3a. The opening 3c is formed on the upper surface of the main body 3a.

  The memorial circulation channel 4 includes a memorial heat exchanger 4a, an outgoing channel 4b, a return channel 4c, and a circulation pump 4d. One end of the forward flow path 4b is connected to the inlet 4e of the secondary side flow path of the tracking heat exchanger 4a. The other end of the forward flow path 4 b is connected to the main body 3 a of the water supply adapter 3 outside the bathtub 10. The opening 3c of the water supply adapter 3 communicates with the forward flow path 4b inside the main body 3a. A circulation pump 4d is connected in the middle of the forward flow path 4b. One end of the return flow path 4c is connected to the outlet 4f of the secondary flow path of the tracking heat exchanger 4a. The other end of the return channel 4 c is connected to the main body 3 a of the water supply adapter 3 on the outside of the bathtub 10. The flow path of the nozzle portion 3b of the water supply adapter 3 communicates with the return flow path 4c inside the main body 3a.

  When the circulation pump 4d is operated, the operation is as follows. The bath water in the bathtub 10 is drawn from the opening 3c of the water supply adapter 3 to the outgoing flow path 4b and guided to the recuperation heat exchanger 4a. The bath water that has passed through the memory heat exchanger 4a returns to the water supply adapter 3 through the return channel 4c, and is discharged from the nozzle portion 3b into the bath water inside the bathtub 10. The arrows in FIG. 1 indicate the direction in which the bath water flows during operation of the circulation pump 4d.

  In the present embodiment, the discharge direction of the nozzle portion 3 b is oblique to the first inner wall 10 a of the bathtub 10. Thereby, the circulation RF can be generated inside the bathtub 10 during the operation of the circulation pump 4d.

  Although not shown in the drawings, a circulation path for circulating hot water supplied from the hot water storage tank 2 or hot water heated by a heating device as a heat source fluid is connected to the primary side flow path of the memory heat exchanger 4a. The When performing the memorial operation which heats the bath water in the bathtub 10, it carries out as follows. The circulation pump 4d is operated and the heat source fluid is circulated to the memory heat exchanger 4a. The bath water heated by receiving the heat of the heat source fluid in the memory heat exchanger 4a returns to the bathtub 10 so that the bath water stored in the bathtub 10 can be heated or kept warm.

  One end of the hot water flow path 5 is connected to the hot water storage tank 2. The other end of the hot water flow path 5 is connected to a branch portion 4g formed in the forward flow path 4b between the reheating heat exchanger 4a and the circulation pump 4d. When performing hot water filling to the bathtub 10, hot water can be supplied from the hot water storage tank 2 to the bathtub 10 via the hot water flow path 5 and the memorial circulation flow path 4. Hot water supplied from the hot water flow path 5 flows from the branch part 4g to the reheating heat exchanger 4a side, reaches the water supply adapter 3 through the return flow path 4c, and is injected into the bathtub 10 from the nozzle part 3b. . Hot water supplied from the hot water flow path 5 may also flow in parallel from the branch portion 4g to the circulation pump 4d side. In that case, hot water supplied from the hot water flow path 5 is injected into the bathtub 10 not only from the nozzle portion 3b but also from the opening 3c. Although not shown, a temperature adjusting unit that adjusts the hot water supply temperature by mixing low temperature water supplied from a water supply pipe is provided in the middle of the hot water flow path 5.

  Control device 6 controls the operation of equipment provided in hot water supply device 1A. The terminal device 7 is capable of bidirectional data communication with the control device 6 by wired communication or wireless communication. In the present embodiment, it is assumed that the terminal device 7 is installed in a bathroom. The terminal device 7 includes a user interface such as an operation unit operated by the user, a display unit for informing the user of information, and a voice announcement device.

  The hot water storage tank 2, the recuperation heat exchanger 4 a, the circulation pump 4 d, a part of the outgoing flow path 4 b, a part of the return flow path 4 c, the hot water flow path 5, and the control device 6 are accommodated in one housing 8. May be.

  The hot water supply apparatus 1 </ b> A according to the present embodiment includes a gas / liquid mixing apparatus 12 and a carbon dioxide generation apparatus 14. The gas-liquid mixing device 12 is connected in the middle of the return flow path 4 c between the reheating heat exchanger 4 a and the water supply adapter 3. An intake passage 13 communicates with the gas-liquid mixing device 12. The intake passage 13 can be opened and closed by an electromagnetic valve 15 installed in the middle of the intake passage 13. When the electromagnetic valve 15 is opened while the bath water is flowing through the memory circulation channel 4, the gas is introduced into the gas-liquid mixing device 12 through the intake passage 13. The gas-liquid mixing device 12 mixes the gas introduced from the intake passage 13 into the bath water. As a result, bubbles are generated in the bath water passing through the gas-liquid mixing device 12. Bath water containing the bubbles is supplied from the nozzle portion 3 b of the water supply adapter 3 into the bathtub 10. The open / close state of the electromagnetic valve 15 is controlled by the control device 6. By adjusting the opening degree of the electromagnetic valve 15, the intake amount of the gas-liquid mixing device 12 can be adjusted. By adjusting the intake air amount of the gas-liquid mixing device 12, the diameter of bubbles generated in the gas-liquid mixing device 12 can be controlled.

  FIG. 2 is a longitudinal sectional view showing an example of the gas-liquid mixing device 12 in the first embodiment. The gas-liquid mixing device 12 shown in FIG. 2 has a venturi mechanism that generates a lower pressure than the low-speed portion by reducing the flow of the fluid and increasing the flow velocity. The gas-liquid mixing device 12 includes an inlet portion 12a, a stationary blade 12b, a reduced diameter portion 12c, a gas introduction portion 12d, and an enlarged diameter portion 12e. The water proceeds from the left side to the right side as indicated by the arrow in the traveling direction P in FIG. The inner diameter of the inlet portion 12a is at least partially constant along the traveling direction P. A stationary blade 12b is installed inside the inlet 12a. The stationary blade 12b generates a swirl flow SF that swirls around the axis 12f of the flow path by applying a swirl force to the flow of water passing through the inlet 12a. The reduced diameter portion 12c is formed coaxially on the downstream side of the inlet portion 12a. The inner diameter of the reduced diameter portion 12c is continuously reduced along the traveling direction P. The internal space of the reduced diameter portion 12c has a substantially conical shape. The reduced diameter portion 12c reduces the radius of the swirling flow SF generated by the stationary blade 12b, and speeds up the swirling flow SF. The gas introduction part 12d has a passage for introducing gas from the outside in the radial direction to the downstream end part of the reduced diameter part 12c, that is, the most reduced diameter part 12g. An intake passage 13 in FIG. 1 is connected to the gas introduction part 12d. Intake can be performed through the intake passage 13 and the gas introduction portion 12d by the negative pressure generated in the most contracted diameter portion 12g. The enlarged diameter portion 12e is formed coaxially on the downstream side of the reduced diameter portion 12c. The inner diameter of the enlarged diameter portion 12e continuously increases along the traveling direction P. The internal space of the enlarged diameter portion 12e has a substantially conical shape. In the enlarged diameter portion 12e, the gas 90 introduced from the gas introduction portion 12d is mixed with the swirling flow SF speeded up by the reduced diameter portion 12c, thereby generating bubbles 90. With such a gas-liquid mixing device 12, the gas introduced from the gas introduction unit 12d is sheared by the swirling flow SF, whereby bubbles 90 having a small diameter, that is, fine bubbles can be generated.

  The structure of the gas-liquid mixing apparatus 12 described above is an example, and a gas-liquid mixing apparatus having another structure may be used. In addition, the gas-liquid mixing device such as the gas-liquid mixing device 12 described above is not limited to a naturally-aspirated gas-liquid mixing device, and a gas-liquid mixing device that forcibly sucks in a pump or the like may be used.

  The carbon dioxide generator 14 can supply carbon dioxide into the intake passage 13. The carbon dioxide generator 14 includes an adsorption unit that adsorbs carbon dioxide in the air and a heating unit that heats the adsorption unit so that the carbon dioxide adsorbed by the adsorption unit is released. In this Embodiment, the adsorption | suction means of the carbon dioxide generator 14 is provided with the air filter containing an amine compound. In this embodiment, an alkylamine derivative containing an alkyl group is used as the amine compound.

  In the present embodiment, the carbon dioxide generator 14 is connected to the inlet portion of the intake passage 13. External air passes through the air filter of the carbon dioxide generator 14 and flows into the intake passage 13. An electromagnetic valve 15 is disposed in the intake passage 13 between the carbon dioxide generator 14 and the gas-liquid mixer 12. One side of the air filter of the carbon dioxide generator 14 is in contact with the atmosphere, that is, air. The air filter of the carbon dioxide generator 14 selectively adsorbs carbon dioxide in the atmosphere, that is, air, at room temperature by the action of the alkylamine derivative.

  At least a part of the air filter of the carbon dioxide generator 14 preferably has a honeycomb or corrugated shape. By doing so, the area in which the air filter comes into contact with air can be increased, so that carbon dioxide in the air can be adsorbed more efficiently.

  When the heating means of the carbon dioxide generator 14 heats the air filter as the adsorption means, carbon dioxide adsorbed on the air filter is released. When the heating means of the carbon dioxide generator 14 heats the air filter while the gas is flowing in the intake passage 13, the carbon dioxide released from the air filter is supplied to the gas-liquid mixing device 12 through the intake passage 13. . Thereby, in the gas-liquid mixing apparatus 12, the gas which has a carbon dioxide concentration higher than the carbon dioxide concentration in air | atmosphere is mixed with water.

  As the heating means of the carbon dioxide generator 14, for example, an electric heater such as a sheathed heater, a rubber heater, a PTC (Positive Temperature Coefficient) heater, a ceramic heater, a band heater, or the like can be used. In this case, the air filter can be efficiently heated by arranging the electric heater so as to cover the air filter or by arranging the electric heater so as to be embedded inside the air filter.

  In the carbon dioxide generator 14, the temperature of the air filter when heated by the heating means is preferably in the range of 40 ° C to 100 ° C. If the said temperature is 40 degreeC or more, the discharge | release rate of the carbon dioxide adsorbed by the air filter can be made high enough. If the said temperature is 100 degrees C or less, energy consumption can be made comparatively low.

  The heating means of the carbon dioxide generator 14 is not limited to the electric heater. For example, you may heat the air filter of the carbon dioxide generator 14 with the heat of the hot water led from the hot water storage tank 2 or the bathtub 10. For example, by providing a heat transfer channel capable of transferring heat to the air filter of the carbon dioxide generator 14 and a switching means for switching between a state in which hot water flows and a state in which no hot water flows through the heat transfer channel, It is possible to switch between a state in which hot water is flown to heat the air filter and a state in which the air filter is at room temperature without flowing hot water through the heat transfer channel.

Although the method of manufacturing the air filter containing the alkylamine derivative with which the carbon dioxide generator 14 is equipped is not specifically limited, For example, the method by the following procedures may be used.
(1) A carrier having pores or layers capable of holding an alkylamine derivative is prepared. The carrier may include, for example, at least one of polymethyl methacrylate, silica, alumina, clay mineral, silica alumina, magnesia, zirconia, and zeolite.
(2) The solid amine absorbent is prepared by dissolving the alkylamine derivative in a solvent and mixing it with the carrier, and then removing the solvent by heating and decompression. The solid absorbent may be prepared by directly mixing the alkylamine derivative and the carrier without using a solvent.
(3) An air filter base material having air permeability is prepared. The air filter substrate may be made of at least one of felt, nonwoven fabric, woven fabric, and mesh, for example. An air filter containing an alkylamine derivative is obtained by holding the solid absorbent on an air filter base material.

In the present embodiment, the air filter of the carbon dioxide generator 14 includes an alkylamine derivative, so that the adsorption of carbon dioxide in the air and the release of carbon dioxide by heating are performed with particularly excellent efficiency. Is possible. As the alkylamine derivatives, for _{example, C n H 2n + 1 NH} 2 (n is an arbitrary integer of 1 to 4) can be used derivatives of lower amines represented by.

  In this embodiment, another amine compound may be used instead of the alkylamine derivative, and in that case, the same effect as described above can be obtained.

  Next, the operation of the first embodiment will be described. FIG. 3 is a flowchart showing an example of the operation of the hot water supply apparatus 1A according to the first embodiment. In step S <b> 1 of FIG. 3, when the user presses a predetermined button on the terminal device 7 for starting hot water filling, the hot water supply for hot water filling the bathtub 10 is started by the control device 6. The process proceeds to step S <b> 2, and hot water adjusted to the temperature set by the user is supplied from the hot water storage tank 2 through the hot water flow path 5 and the recirculation circulation path 4 into the bathtub 10.

  In step S2, it is as follows. The control device 6 closes the electromagnetic valve 15. For this reason, no gas is supplied to the gas-liquid mixing device 12, and no bubbles are generated from the gas-liquid mixing device 12. Further, the control device 6 prevents the heating means of the carbon dioxide generator 14 from heating the air filter, so that carbon dioxide is not released from the carbon dioxide generator 14. Thus, in the present embodiment, when hot water is supplied to the bathtub 10, the carbon dioxide generator 14 is operated so that the heating means does not heat the air filter. When the hot water is supplied to the bathtub 10, it is not necessary for the user to take a bath, so it is not necessary to supply carbon dioxide to the bathtub 10.

  The process proceeds to step S3, and when the water level in the bathtub 10 reaches the water level set by the user, the control device 6 stops the hot water supply and the hot water filling ends. Although not shown, the water level in the bathtub 10 can be detected by a water level sensor installed in the recirculation circulation channel 4 or an integrated flow rate of a flow rate sensor installed in the hot water flow channel 5.

  When the user presses a predetermined button on the terminal device 7 for supplying carbon dioxide to the bathtub 10, the process proceeds to step S4, and a carbon dioxide supply operation is started. The process proceeds to step S5, and the control device 6 opens the electromagnetic valve 15 and operates the circulation pump 4d. The process proceeds to step S6, and the control device 6 controls the heating means in the carbon dioxide generator 14 so that the heating means heats the air filter. As a result, the carbon dioxide adsorbed by the air filter is released and supplied to the gas-liquid mixing device 12 through the intake passage 13. In this way, bubbles containing carbon dioxide supplied from the carbon dioxide generator 14 are generated by the gas-liquid mixing device 12, and bath water containing the bubbles flows into the bathtub 10 (step S7).

  When the controller 6 stops the operation of supplying carbon dioxide, the process proceeds to step S8, the electromagnetic valve 15 is closed, the circulation pump 4d is stopped, and the heating of the air filter in the carbon dioxide generator 14 is stopped. To do. Thereby, the carbon dioxide supply operation ends (step S9). For example, the control device 6 ends the carbon dioxide supply operation when a certain time has elapsed since the start of the carbon dioxide supply operation. When the user presses a predetermined button on the terminal device 7 for ending the carbon dioxide supply operation, the control device 6 ends the carbon dioxide supply operation.

  According to the present embodiment, by supplying carbon dioxide to the bath water in the bathtub 10, the effects expected to be obtained by hot water containing carbon dioxide, for example, recovery from fatigue, reduction of muscle pain, heat retention, blood pressure lowering Etc. (hereinafter referred to as "warm bath effect") can be provided to bathers.

  In the present embodiment, since the carbon dioxide generator 14 does not require a decompression pump, the noise can be reduced and the carbon dioxide generator 14 can be disposed in a space-saving manner. Further, in the present embodiment, the carbon dioxide generator 14 does not require frequent replacement, unlike the carbon dioxide gas cylinder, and therefore requires less maintenance.

  If it is this Embodiment, a carbon dioxide can be supplied with the bubble produced | generated by the gas-liquid mixing apparatus 12, especially a fine bubble. Since such bubbles easily adhere to the skin of the bather in the bathtub 10, the hot bath effect can be further improved.

  In the present embodiment, in the carbon dioxide supply operation, bubbles having a distribution peak in the range of 100 nm to 10 μm and / or bubbles having a distribution peak in the range of 20 μm to 500 μm are used. It is preferable to produce. Fine bubbles having a distribution peak in the range of 100 nm to 10 μm in diameter are particularly easy to adhere to the skin of the bather, so that the bathing effect can be further improved. A relatively large bubble having a distribution peak in the range of 20 μm to 500 μm in diameter can be expected to have a physical effect on the bather's skin. By adjusting the intake air amount with the electromagnetic valve 15, the diameter of the bubbles generated by the gas-liquid mixing device 12 can be controlled. When the intake amount is decreased, the bubble diameter is reduced, and when the intake amount is increased, the bubble diameter is increased. For this reason, in the single gas-liquid mixing device 12, by operating by changing the intake air amount, bubbles having a distribution peak in the range of 100 nm to 10 μm in diameter and distribution peaks in the range of 20 μm to 500 μm in diameter are obtained. Both bubbles can be generated. In addition, a gas-liquid mixing device that generates bubbles having a distribution peak in a diameter range of 100 nm to 10 μm and a gas-liquid mixing device that generates bubbles having a distribution peak in a diameter range of 20 μm to 500 μm are separately provided. It may be. In addition, the diameter of the bubble produced | generated with the gas-liquid mixing apparatus 12 can be measured by methods, such as an image analysis method and a laser diffraction / scattering method, for example.

  If it is this Embodiment, the following effects will be acquired by performing a carbon dioxide supply operation | movement using the gas-liquid mixing apparatus 12 arrange | positioned at the memorial circulation flow path 4 connected to the bathtub 10. FIG. The synergistic effect with the warm bath effect by carbon dioxide is acquired because the flow of the bath water generated in the bathtub 10 exerts a physical action on the bather's skin.

  In the present embodiment, since the carbon dioxide generated from the carbon dioxide generator 14 can be supplied into the bathtub 10 using the supplementary circulation flow path 4 having the supplementary heat exchanger 4a, the number of additional parts is reduced. This can reduce the cost.

  The hot water supply apparatus 1A of the present embodiment is generated by the gas-liquid mixing apparatus 12 by opening the electromagnetic valve 15 and operating the circulation pump 4d without heating the air filter in the carbon dioxide generator 14 by heating means. An operation mode for supplying the air bubbles into the bathtub 10 may be provided. This operation mode is referred to as “normal bubble supply operation”. In the normal bubble supply operation, since carbon dioxide is not released from the air filter of the carbon dioxide generator 14, normal bubbles having a low carbon dioxide concentration are supplied into the bathtub 10. It is desirable that the user can easily select the above-described carbon dioxide supply operation and the normal bubble supply operation by operating the terminal device 7.

  In the normal bubble supply operation, when external air passes through the air filter of the carbon dioxide generator 14 and flows into the intake passage 13, if the carbon dioxide in the air is adsorbed by the air filter, the gas-liquid mixing device 12 The carbon dioxide concentration in the air supplied to is lower than the carbon dioxide concentration in the atmosphere. On the other hand, in this case, if the carbon dioxide adsorption amount of the air filter of the carbon dioxide generator 14 is saturated, the carbon dioxide is not adsorbed any more by the air filter, so that the air in the air supplied to the gas-liquid mixing device 12 The carbon dioxide concentration is equal to the carbon dioxide concentration in the atmosphere.

  Each function of the control device 6 may be realized by a processing circuit. The processing circuit of the control device 6 may include at least one processor and at least one memory. The at least one processor may realize each function of the control device 6 by reading and executing a program stored in at least one memory. The processing circuit of the control device 6 may include at least one dedicated hardware. The configuration is not limited to the configuration in which the operation is controlled by the single control device 6, and the configuration may be such that the operation is controlled by cooperation of a plurality of control devices.

Embodiment 2. FIG.
Next, the second embodiment will be described with reference to FIG. 4. The description will focus on the differences from the first embodiment described above, and the description of the same or corresponding parts will be simplified or omitted.

  FIG. 4 shows a hot water supply apparatus 1B according to the second embodiment. As shown in FIG. 4, hot water supply apparatus 1B of the second embodiment further includes a blower 16 in addition to the same configuration as hot water supply apparatus 1A of the first embodiment. The blower 16 is an example of a blower that can blow air to the air filter of the carbon dioxide generator 14.

  A branch passage 17 branches from an intake passage 13 between the carbon dioxide generator 14 and the electromagnetic valve 15. When the blower 16 is operated, the blower 16 causes the air taken from the outside to flow into the branch passage 17. A second electromagnetic valve 18 installed in the branch passage 17 opens and closes the branch passage 17.

  During the carbon dioxide supply operation and the normal bubble supply operation in the second embodiment, the operation is as follows. During the carbon dioxide supply operation and the normal bubble supply operation, the blower 16 is stopped and the second electromagnetic valve 18 is closed. In this state, the carbon dioxide supply operation and the normal bubble supply operation can be executed as in the first embodiment.

  When the carbon dioxide supply operation and the normal bubble supply operation are not executed, the control device 6 can perform a blowing operation for blowing air to the air filter of the carbon dioxide generation device 14. In the air blowing operation, it is as follows. The electromagnetic valve 15 is closed, the second electromagnetic valve 18 is opened, and the blower 16 is operated. The air taken in by the blower 16 passes through the branch passage 17, flows back through the intake passage 13, passes through the air filter of the carbon dioxide generator 14, and is discharged to the outside. By performing the air blowing operation, air is forced to flow through the air filter of the carbon dioxide generator 14, and the air filter efficiently adsorbs carbon dioxide in the air.

  Prior to the carbon dioxide supply operation, it is desirable to sufficiently secure the carbon dioxide adsorption amount of the air filter of the carbon dioxide generator 14. If it is this Embodiment, it will become possible to adsorb | suck the carbon dioxide in the air to the air filter of the carbon dioxide generator 14 efficiently in a short time by performing the ventilation operation mentioned above.

1A, 1B Hot water supply device, 2 Hot water storage tank, 3 Water supply adapter, 4 Recirculation circulation flow path, 4a Reheating heat exchanger, 4d Circulation pump, 5 Hot water flow path, 6 Control device, 7 Terminal device, 10 Bath, 12 Air Liquid mixing device, 13 Intake passage, 14 Carbon dioxide generator, 15 Solenoid valve, 16 Blower, 17 Branch passage, 18 Second solenoid valve

Claims (12)

A gas-liquid mixing device that mixes the gas supplied through the intake passage with water;
A carbon dioxide generator capable of supplying carbon dioxide into the intake passage;
With
The carbon dioxide generator includes an adsorption unit that adsorbs carbon dioxide in the air, and a heating unit that heats the adsorption unit so that the carbon dioxide adsorbed by the adsorption unit is released.
Hot water supply device.   The hot water supply apparatus according to claim 1, wherein the adsorption unit includes an air filter containing an amine compound.   The hot water supply apparatus according to claim 1, wherein the adsorption unit includes an air filter containing an alkylamine derivative.   4. The hot water supply apparatus according to claim 2, wherein at least a part of the air filter has a honeycomb shape or a corrugated shape. 5.   The hot water supply apparatus according to any one of claims 1 to 4, wherein the temperature of the adsorption means when heated by the heating means falls within a range of 40 ° C to 100 ° C.   The hot-water supply apparatus as described in any one of Claims 1-5 by which the said gas-liquid mixing apparatus is arrange | positioned in the circulation flow path connected to the bathtub.   The carbon dioxide released from the carbon dioxide generator when the bath water in the bath flows through the circulation channel can be mixed with the bath water by the gas-liquid mixing device and supplied into the bath. 6. A hot water supply apparatus according to 6.   The hot water supply apparatus according to claim 6 or 7, wherein the circulation channel includes a reheating heat exchanger for heating the bath water.   The hot water supply device according to any one of claims 1 to 8, wherein the gas-liquid mixing device is disposed in a flow path for supplying hot water to the bathtub.   The hot water supply apparatus according to claim 9, wherein when the hot water is supplied to the bathtub, the heating means is operated so as not to heat the adsorption means.   The hot-water supply apparatus as described in any one of Claims 1-10 provided with the ventilation means which can ventilate to the said adsorption | suction means.   12. The gas-liquid mixing device generates at least one of bubbles having a distribution peak in a diameter range of 100 nm to 10 μm and bubbles having a distribution peak in a diameter range of 20 μm to 500 μm. The hot-water supply apparatus as described in any one.

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