JP2011247460A - Storage type water heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve a user-friendly storage type water heater that supplies hot water stably.SOLUTION: The storage type water heater includes: a hot water storage tank 20; a water supply pipe line 30 for supplying city water to the lower part of the hot water storage tank 20; a hot water supply pipe line CL for supplying the hot water stored in the hot water storage tank 20 to a bathtub 150; a fine bubble generator 70 provided in the water supply pipe line 30, for introducing fine bubbles into the city water flowing through the water supply pipe line 30; a recovery section 81 provided in the hot water supply pipe line CL, for recovering the fine bubbles in hot water flowing through the hot water supply pipe line CL; and a discharger 82 for discharging the air resulted from collecting and accumulating the fine bubbles in the recovery section 81, to the outside.

Description

  The present invention relates to a hot water storage type water heater having a hot water storage tank.

  Hot water boiled by the heat source machine is temporarily stored in a hot water storage tank, and when the user opens the hot water tap provided at the end of the hot water supply pipe connected to the hot water storage tank, the hot water in the hot water storage tank remains as it is, or Some hot water heaters configured to mix with water and discharge hot water have been developed with an automatic cleaning function that introduces microbubbles into the hot water storage tank for cleaning. (For example, patent document 1).

JP 2009-293903 A

  In the water heater described in Patent Document 1, the fine bubbles remaining after the cleaning are combined in the hot water storage tank and the pipe and remain as large bubbles. If hot water is supplied to the bathtub or faucet in this state, a large amount of bubbles will intermittently come out to the bathtub or faucet together with the hot water, resulting in unstable usability such as unstable hot water supply or hot water mixed with air. It was.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an easy-to-use hot water storage type hot water supply device that can stably supply hot water.

  The hot water storage type water heater of the present invention includes a hot water storage tank, a water supply pipe that supplies city water to the lower part of the hot water storage tank, a hot water supply pipe that supplies hot water stored in the hot water storage tank to the bathtub, and a water supply pipe A microbubble generating means for introducing microbubbles into the city water flowing through the water supply pipe, and a recovery unit for collecting the microbubbles in the hot water flowing through the pouring pipe, And a discharge unit that discharges air generated by the collection of the microbubbles collected in the collection unit to the outside.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to obtain the hot water storage type hot water supply machine which can perform supply of stable hot water.

It is a block diagram of the hot water storage type water heater by Embodiment 1 of this invention. It is a block diagram of the hot water storage type water heater by Embodiment 2 of this invention. It is a block diagram of the hot water storage type water heater by Embodiment 3 of this invention. It is a block diagram of the hot water storage type water heater by Embodiment 4 of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In each figure, the flow path that is the center of the description is indicated by a bold line, and the flow in the flow path is indicated by an arrow.

Embodiment 1 FIG.
FIG. 1 is a configuration diagram illustrating an example of a hot water storage type water heater according to Embodiment 1 of the present invention. The hot water storage type water heater 120 shown in the figure is used in the bathtub 150, a function of boiling low-temperature water such as city water into hot water with a heat source machine and supplying hot water to a desired location, a function of supplying hot water to the bathtub 150 at an appropriate temperature, and the like. The hot water storage type hot water heater 120 includes a heat pump unit 10 and a hot water supply unit 100. Hereinafter, each component of the hot water storage type water heater 120 will be described.

  The heat pump unit 10 is a refrigeration cycle system including a compressor 1 that compresses refrigerant, a heat exchanger 3 for boiling, an expansion valve 5, an evaporator 7, and a circulation pipe 9 that connects these in an annular shape. It functions as a heat source machine. In the above-described refrigeration cycle system, the refrigerant is compressed by the compressor 1 to become high temperature and high pressure and then radiated by the boiling heat exchanger 3, depressurized by the expansion valve 5, and absorbed by the evaporator 7 to be in a gas state. And is sucked into the compressor 1.

  On the other hand, the hot water supply unit 100 includes a hot water storage tank 20, a water supply line 30, a heating circulation line 40, a heat source circulation line 50, a reheating circulation line 60, a reheating heat exchanger 65, a hot water supply line 80, A control unit 90 is included.

  The hot water storage tank 20 is made of stainless steel, stores water supplied from the water supply conduit 30, and stores hot water boiled by the heat pump unit 10, and is always kept in a full water state.

  The water supply pipe 30 is a pipe that supplies low-temperature water such as city water to the hot water storage tank 20, the first mixing valve 75a, the second mixing valve 75b, and the hot water tap 160, and the first to fourth water supply pipe sections 30a to 30d. And a pressure reducing valve 25 for reducing the water pressure to a predetermined value or less. The first water supply pipe section 30a connects a water source (not shown) such as a water supply and the pressure reducing valve 25, the second water supply pipe section 30b connects the pressure reducing valve 25 and the lower part of the hot water storage tank 20, and the third water supply pipe section 30c. Connects the pressure reducing valve 25 and the first and second mixing valves 75a and 75b. The fourth water supply pipe portion 30d branches from the first water supply pipe portion 30a and connects the first water supply pipe portion 30a and the hot water tap 160. In order to clean the inside of the hot water storage tank 20, the second water supply pipe portion 30b is provided with microbubble generating means 70 that generates and supplies microbubbles to the water flowing inside.

  The heating circulation pipe 40 is a pipe that takes water from the lower part of the hot water storage tank 20 and returns it to the hot water storage tank 20 from the upper part of the hot water storage tank 20, and includes an outgoing pipe 40a, a return pipe 40b, and a boiling water pump 35. Is included. The forward pipe 40 a connects the lower part of the hot water storage tank 20 and the boiling heat exchanger 3, and the return pipe 40 b connects the boiling heat exchanger 3 and the upper part of the hot water storage tank 20. The boiling water pump 35 is provided in the middle of the forward pipe 40a.

  The heat source circulation pipe 50 is a pipe that takes hot water from the upper part of the hot water storage tank 20 and returns the hot water from the lower part of the hot water storage tank 20 to the hot water storage tank 20, and includes the forward pipe 50a, the return pipe 50b, and the heat source water supply pump 45. Is included. The forward pipe 50 a connects the upper part of the hot water storage tank 20 and the upper part of the reheating heat exchanger 65, and the return pipe 50 b connects the lower part of the reheating heat exchanger 65 and the lower part of the hot water storage tank 20. The heat source water supply pump 45 is provided in the middle of the return pipe 50b.

  The recirculation circulation pipe 60 is a pipe that takes the bath water 150a from the side of the bathtub 150 and returns it to the bathtub 150 from the side of the bathtub 150. The return pipe 60a, the return pipe 60b, and the reheating pipe A water pump 55 is included. The forward pipe 60 a connects the side of the bathtub 150 and the bathtub-side inlet at the bottom of the heating heat exchanger 65, and the return pipe 60 b is the bathtub-side outlet and the bathtub at the top of the heating heat exchanger 65. Connect 150 sides. The tracking water pump 55 is provided in the middle of the outgoing pipe 60a.

  The reheating heat exchanger 65 is a plate heat exchanger in which a plurality of heat transfer plates are stacked in the height direction of the reheating heat exchanger 65, and hot water flowing through the heat source circulation pipe 50 Heat is exchanged with the bath water 150a flowing through the recirculation circulation line 60 to heat the bath water 150a.

  The hot water supply line 80 supplies hot water stored in the hot water storage tank 20 to the bathtub 150 and the hot water tap 160, and includes first to third hot water supply pipe portions 80a to 80c, a first mixing valve 75a, and a second mixing valve. 75b is included.

  The end of the first hot water supply pipe section 80a on the hot water storage tank 20 side is a shared pipe CL that is shared with the forward pipe 50a of the heat source circulation pipe 50, and the downstream end of the first hot water supply pipe section 80a. The part branches into two flow paths, one connected to the first mixing valve 75a and the other connected to the second mixing valve 75b. In addition, the second hot water supply pipe section 80 b connects the first mixing valve 75 a and the return pipe 60 b in the recirculation circulation pipe 60, and the recirculation circulation pipe 60 is a part of the hot water supply pipe 80. It has become. The first hot water supply pipe portion 80a, the first mixing valve 75a, the second hot water supply pipe portion 80b, and the recirculation circulation pipe line 60 constitute a hot water supply pipe line BL for supplying hot water in the hot water storage tank 20 to the bathtub 150. ing. Therefore, the pouring line BL includes a recirculation circulation line 60.

  The upstream end of the third hot water supply pipe section 80 c in the hot water supply pipe line 80 is connected to the second mixing valve 75 b, and the downstream end of the third hot water supply pipe section 80 c is connected to the hot water tap 160.

  In the middle of the second hot water supply pipe portion 80b, after the micro bubbles are mixed into the hot water flowing inside, the micro bubbles are collected by the buoyancy when the flow is stopped. Is provided. The microbubble collecting unit 81 forms a space in which air is accumulated in a pipe portion bent in an inverted U shape at the uppermost vertical portion of the second hot water supply pipe portion 80b arranged in the vertical direction. It is configured. The recovery unit 81 includes discharge means 82 configured to be able to discharge the air accumulated in the collection unit 81 from the second hot water supply pipe unit 80b. It is connected. For example, a commercially available air vent valve (a valve that discharges only air from a fluid in which air and water are mixed) can be used as the discharge means 82.

  Based on information such as the boiling start time, the boiling temperature, the amount of hot water, and the hot water temperature input by the user from the remote controller operation unit 95, the control unit 90 is based on the heat pump unit 10, the boiling water pump 35, and the heat source water. The operations of the pump 45, the reheating water pump 55, the fine bubble generating means 70, the first mixing valve 75a, and the second mixing valve 75b are controlled. Each of the first mixing valve 75a and the second mixing valve 75b is an electric mixing valve. The remote control operation unit 95 is used as an input device for the control unit 90 by wired connection or wireless connection to the control unit 90.

  In the hot water storage type water heater 120 having the above-described configuration, when the boiling start time set by the user is reached, the heat pump unit 10 and the boiling water pump 35 operate under the control of the control unit 90, and the boiling operation is performed. Done. At this time, water taken from the lower part of the hot water storage tank 20 flows through the heating circulation pipe 40 and is heated to hot water in the process of passing through the heating heat exchanger 3 and is transferred from the upper part of the hot water storage tank 20 to the hot water storage tank 20. Returned. A temperature sensor (not shown) is provided at the downstream end of the forward pipe 40a in the heating circulation line 40, and the controller 90 monitors the temperature detected by the temperature sensor, and the detected temperature is a predetermined temperature. Then, the boiling operation is terminated.

  When the user instructs hot water filling from the remote control operation unit 95, the operation of the first mixing valve 75a is controlled by the control unit 90, and the hot water in the hot water storage tank 20 is mixed with city water and adjusted to a predetermined hot water temperature. A predetermined amount of hot water is supplied to 150. When the user opens the hot water tap 160, the controller 90 controls the operation of the second hot water / water mixing valve 75b, and the hot water in the hot water storage tank 20 is mixed with city water and adjusted to a predetermined hot water temperature. Hot water is supplied from the hot water tap 160.

  Then, when the user gives an instruction to retreat the bath water 150a from the remote controller operation unit 95, the heat source water supply pump 45 and the replenishment water supply pump 55 operate under the control of the control unit 90, and the reheating operation is performed. .

  At this time, hot water taken from the upper part of the hot water storage tank 20 flows through the heat source circulation conduit 50 and is returned from the lower part of the hot water storage tank 20 to the hot water storage tank 20, while bath water 150 a taken from the bathtub 150 is added. It flows through the circulating circulation pipe 60 and is returned to the bathtub 150. Heat is exchanged between the hot water flowing through the heat source circulation line 50 and the bath water 150a flowing through the recirculation circulation line 60 by the reheating heat exchanger 65, and the bath water 150a is reclaimed. A temperature sensor (not shown) is provided in the return pipe 60b of the recirculation circulation line 60, and the control unit 90 monitors the temperature detected by the temperature sensor and adds the temperature sensor when the temperature reaches a predetermined temperature. End the whisper operation.

  Next, characteristic operations of the present invention will be described. In this hot water storage type water heater 120, the low temperature water such as city water is stored in the hot water storage tank 20 through the water supply pipe 30, and the second hot water supply operation or the hot water supply operation from the hot water tap 160 is performed in the second state. When the control unit 90 operates the micro-bubble generating means 70 installed at the portion connecting the water supply pipe section 30b and the hot water storage tank 20, the micro-bubble generating means 70 is microscopically introduced into the low-temperature water flowing in the second water supply pipe section 30b. Generate bubbles. As a result, the generated fine bubbles are discharged into the hot water in the hot water storage tank 20, and a part of the bubbles are adsorbed on the internal surface of the hot water storage tank 20 to remove the accumulated dirt, and to the internal surface of the hot water storage tank 20. Prevent contamination.

  Further, the water containing the fine bubbles introduced into the hot water storage tank 20 is subjected to a hot water beam operation to cause the fine bubbles to flow from the hot water supply pipe line 80 to the bathtub 150 through the first hot water supply pipe part 80a and the second hot water supply pipe part 80b. Supply. When the hot water beam operation is stopped, micro bubbles stay in the hot water supply pipe line 80, the first hot water supply pipe part 80a, and the second hot water supply pipe part 80b. Therefore, by providing the second hot water supply pipe portion 80b with the recovery unit 81 arranged in an inverted U shape, the fine bubbles staying in the hot water supply pipe line 80 can be collected in the recovery unit 81. Thereafter, the air generated by the collection of bubbles accumulated by the discharge means 82 provided in the collection unit 81 is released to the outside. As a result, the fine bubbles that remain when the hot water is poured next do not collect and remain as large bubbles, so that stable hot water can be supplied.

Embodiment 2. FIG.
FIG. 2 is a configuration diagram illustrating a hot water storage type hot water heater 120a according to Embodiment 2 of the present invention. In FIG. 2, the same or corresponding parts as those in FIG. In hot water storage type hot water heater 120a of Embodiment 2 of the present invention, when micro bubbles are mixed with hot water flowing in the middle of third hot water supply pipe portion 80c, when the flow stops, the micro bubbles have their buoyancy. There is provided a microbubble collecting part 81a configured to be collected in The microbubble collection unit 81a is configured by forming a space in which air is accumulated in a pipe portion bent in an inverted U shape in the middle of the third hot water supply pipe unit 80c. The recovery unit 81a includes discharge means 82a configured to discharge the air accumulated in the collection unit 81a from the third hot water supply pipe unit 80c. It is connected. As the discharge means 82a, for example, a commercially available air vent valve can be used.

  The microbubbles generated in the hot water storage tank 20 perform a hot water supply operation to open the hot water tap 160, so that the micro bubbles pass from the hot water supply pipe line 80 to the hot water tap 160 through the first hot water supply pipe portion 80 a and the third hot water supply pipe portion 80 c. Supply. When the hot water supply operation is stopped, micro bubbles stay in the hot water supply pipe 80. Therefore, by providing the recovery part 81a in the third hot water supply pipe part 80c, the micro bubbles staying in the third hot water supply pipe part 80c can be collected. Thereafter, the air collected by the bubbles staying outside can be released by the discharge means 82 provided in the recovery unit 81a, and the remaining microbubbles will not collect and remain as large bubbles. When hot water is supplied, stable hot water can be supplied.

Embodiment 3 FIG.
FIG. 3 is a configuration diagram illustrating a hot water storage type hot water heater 120b according to Embodiment 3 of the present invention. In FIG. 3, the same or corresponding parts as those in FIGS. 1 and 2 are denoted by the same reference numerals and description thereof is omitted. In hot water storage type water heater 120b according to Embodiment 3 of the present invention, when microbubbles are mixed with hot water flowing in the middle of heating circulation conduit 40, when the flow stops, the microbubbles are caused by their buoyancy. A microbubble collection unit 81b configured to gather is provided. The micro-bubble collecting unit 81b has a reverse U-shape in the middle of the forward pipe 40a so that the micro-bubbles remaining in the forward pipe 40a upstream of the boiling water pump 35 of the heating circulation pipe 40 can be collected. It is configured by forming a space in which air is stored in a pipe portion bent into a shape. The recovery unit 81b is connected to a discharge means 82b configured to be able to discharge the air accumulated in the collection unit 81b from the heated circulation pipe 40. Has been. As the discharge means 82b, for example, a commercially available air vent valve can be used.

  The micro bubbles generated in the hot water storage tank 20 are supplied to the heating circulation line 40 by performing a boiling operation. When the boiling operation is stopped, micro bubbles stay in the heating circulation pipe 40. Therefore, by providing the recovery part 81b in the forward pipe 40a upstream of the boiling water pump 35, the micro bubbles staying in the forward pipe 40a can be collected. The collected micro bubbles are collected and become air pools, but can be released to the outside by the discharge means 82b provided in the recovery unit 81b, and the air is mixed into the water pump 35 for boiling during the next boiling operation. Since no hot water is supplied, the water supply pump 35 for boiling does not cause air to run idle, or the flow pulsates and does not affect the boiling operation or the boiling temperature. Can do.

Embodiment 4 FIG.
FIG. 4 is a block diagram showing a hot water storage type hot water supply device 120c according to Embodiment 4 of the present invention. In FIG. 4, the same or corresponding parts as those in FIGS. 1 to 3 are denoted by the same reference numerals and description thereof is omitted. In hot water storage type water heater 120c according to Embodiment 4 of the present invention, when the micro bubbles are mixed with hot water flowing through the heat source circulation pipe 50, the flow of the micro bubbles is reduced when the flow stops. There is provided a microbubble collecting part 81c configured so as to be gathered at. The micro-bubble collecting unit 81c has an inverted U-shape in the middle of the forward pipe 50a so that the micro-bubbles remaining in the forward pipe 50a upstream of the heat source water supply pump 45 of the heat source circulation pipe 50 can be collected. It is configured by forming a space in which air is stored in a pipe portion bent into a shape. The recovery unit 81c includes discharge means 82c configured to be able to discharge the air accumulated in the collection unit 81c into a pool of air out of the heat source circulation pipe 50. It is connected. In this Embodiment 4, this discharge | emission means 82c is connected to the collection | recovery part 81c provided on the common piping CL (a part is shared with the circulation pipe 50 for heat sources) connected to the upper part of the hot water storage tank 20. As in the first to third embodiments, a commercially available air vent valve can be used.

  The microbubbles generated in the hot water storage tank 20 are replenished to supply the microbubbles to the heat source circulation conduit 50. When the chasing operation is stopped, micro bubbles stay in the heat source circulation pipe 50. Therefore, by providing the recovery portion 81c in the forward pipe 50a upstream of the heat source water supply pump 45, the fine bubbles staying in the forward pipe 50a can be collected. The collected micro bubbles are collected and become a pool of air, but can be released to the outside by the discharge means 82c provided in the recovery portion 81c, and the hot water in which air is mixed into the heat source water supply pump 45 during the follow-up operation. Therefore, the heat source water supply pump 45 does not run in the air and idles or the flow pulsates and does not affect the chasing operation, so that stable hot water can be supplied. In addition, since the recovery part 81c and the discharge means 82c are provided on the common pipe CL, air pools generated from the accumulated fine bubbles remaining in the hot water storage tank 20 after the hot water from the hot water storage tank 20 to the hot water outlets are collected. It can be recovered and discharged out of the system, and stable hot water can be supplied.

  As described above, according to the present invention, it is possible to obtain an easy-to-use hot water storage type hot water heater capable of stably supplying hot water.

DESCRIPTION OF SYMBOLS 1 Compressor 3 Heat exchanger for boiling 5 Expansion valve 7 Evaporator 9 Circulation piping 10 Heat pump unit 20 Hot water storage tank 25 Pressure reducing valve 30 Water supply line 30a 1st water supply pipe part 30b 2nd water supply pipe part 30c 3rd water supply pipe part 30d Fourth water supply pipe section 35 Water supply pump for boiling 40 Heating circulation pipe 40a Outward pipe 40b Return pipe 45 Heat source water supply pump 50 Heat source circulation pipe 50a Outward pipe 50b Return pipe 55 Reheating water supply pump 60 Circulation line 60a Outward pipe 60b Return pipe 65 Reheating heat exchanger 70 Microbubble generating means 75a First mixing valve 75b Second mixing valve 80 Hot water supply line 80a First hot water supply pipe part 80b Second hot water supply pipe part 80c Third Hot water supply pipe section 81, 81a, 81b, 81c Recovery section 82, 82a, 82b, 82c Discharge means 90 Control section 95 Remote control operation section 100 Supply Unit 120, 120a, 120b, 120c hot-water storage type water heater 150 tub 150a bath water 160 water tap BL Chuyukanro CL shared conduit

Claims (4)

A hot water storage tank,
A water supply line for supplying city water to the lower part of the hot water storage tank;
A pouring pipe for supplying hot water stored in the hot water storage tank to the bathtub;
Microbubble generating means that is provided in the water supply pipe and introduces microbubbles into city water flowing in the water supply pipe;
A recovery unit that is provided in the pouring pipeline and collects micro bubbles in the hot water flowing in the pouring pipeline,
A discharge means for releasing the air generated by the collection of the microbubbles collected in the recovery unit to the outside;
A hot water storage type water heater characterized by comprising A hot water storage tank,
A water supply line for supplying city water to the lower part of the hot water storage tank;
A hot water supply line for supplying hot water stored in the hot water storage tank to a hot water supply destination such as a faucet,
Microbubble generating means that is provided in the water supply pipe and introduces microbubbles into city water flowing in the water supply pipe;
A recovery unit that is provided in the hot water supply pipe and collects micro bubbles in hot water flowing in the hot water supply pipe;
A discharge means for releasing the air generated by the collection of the microbubbles collected in the recovery unit to the outside;
A hot water storage type water heater characterized by comprising A hot water storage tank,
A water supply line for supplying city water to the lower part of the hot water storage tank;
A heating circulation line provided with a circulation means for taking out hot water from the lower part of the hot water storage tank, heating and raising the temperature by a heating means and returning it to the upper part of the hot water storage tank,
Microbubble generating means that is provided in the water supply pipe and introduces microbubbles into city water flowing in the water supply pipe;
A recovery unit that is provided at a position upstream of the circulation means of the heating circulation pipe and collects micro bubbles in hot water flowing in the heating circulation pipe;
A discharge means for releasing the air generated by the collection of the microbubbles collected in the recovery unit to the outside;
A hot water storage type water heater characterized by comprising A hot water storage tank,
A water supply line for supplying city water to the lower part of the hot water storage tank;
Heat source side circulation means for removing hot water stored in the hot water storage tank from the upper part of the hot water storage tank and returning it to the lower part, and heat exchange with the bath water by a heat exchanger provided in the middle to heat the bath water A heat source circulation conduit configured to be possible;
Microbubble generating means that is provided in the water supply pipe and introduces microbubbles into city water flowing in the water supply pipe;
A recovery unit that is provided at a position upstream of the heat source side circulation means of the heat source circulation pipe and collects micro bubbles in hot water flowing in the heat source circulation pipe;
A discharge means for releasing the air generated by the collection of the microbubbles collected in the recovery unit to the outside;
A hot water storage type water heater characterized by comprising

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