JP2007315620A - Water heater - Google Patents

Water heater Download PDF

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Publication number
JP2007315620A
JP2007315620A JP2006142620A JP2006142620A JP2007315620A JP 2007315620 A JP2007315620 A JP 2007315620A JP 2006142620 A JP2006142620 A JP 2006142620A JP 2006142620 A JP2006142620 A JP 2006142620A JP 2007315620 A JP2007315620 A JP 2007315620A
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JP
Japan
Prior art keywords
hot water
storage tank
water
circulation circuit
heat exchanger
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2006142620A
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Japanese (ja)
Inventor
Yasushi Murakoshi
康司 村越
Original Assignee
Sanden Corp
サンデン株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Sanden Corp, サンデン株式会社 filed Critical Sanden Corp
Priority to JP2006142620A priority Critical patent/JP2007315620A/en
Publication of JP2007315620A publication Critical patent/JP2007315620A/en
Pending legal-status Critical Current

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24DDOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D17/00Domestic hot-water supply systems
    • F24D17/02Domestic hot-water supply systems using heat pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24DDOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2200/00Heat sources or energy sources
    • F24D2200/16Waste heat
    • F24D2200/20Sewage water

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water heater which utilizes heat energy remaining in hot water used for prescribed purposes such as remaining hot water in a bathtub, for heating water with a simple structure. <P>SOLUTION: As the heat energy of the remaining hot water in the bathtub 30 is recovered by the water flowing out of a lower portion of a hot water storage tank 10 heated by a gas cooler 22, it is unnecessary to recover the heat energy of the remaining hot water in the bathtub 30 by a refrigerant circulating in a refrigerant circuit of a heat pump unit 20, and the heat energy of the remaining hot water in the bathtub 30 is utilized in heating the water with the simple structure of only piping for circulating the water. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a hot water supply apparatus that stores hot water heated in a heating section such as a gas cooler of a heat pump cycle in a hot water storage tank.

  Conventionally, this type of hot water supply apparatus includes a refrigerant circuit that is provided as a heating unit that heats water and that constitutes a heat pump cycle, and a hot water storage tank that stores high-temperature water heated by the heating unit. For example, a high temperature water supplied to a kitchen sink or a bathroom tub is known.

In addition, as a method of recovering the thermal energy of hot water used for a predetermined application, such as remaining hot water in a bathtub after bathing, as thermal energy for heating water stored in a hot water storage tank, the refrigerant circulating in the refrigerant circuit and the bathtub A heat recovery heat exchanger capable of exchanging heat with the remaining hot water is provided, and a heat exchanger for recovering heat energy of the remaining hot water in the bathtub is known (for example, Patent Document 1).
JP 11-118246 A

  However, in the hot water supply device, in order to recover the thermal energy of the remaining hot water in the bathtub, a heat exchanger for heat recovery and a heat exchanger that absorbs the heat energy in the atmosphere during normal operation are required, respectively. Since the piping of the refrigerant circuit is complicated, there is a problem that the manufacturing cost increases.

  The present invention has been made in view of the above-mentioned problems, and the object of the present invention is to heat water remaining in hot water used for a predetermined application, such as remaining hot water in a bathtub, with a simple structure. It is in providing the hot water supply apparatus which can be utilized.

  In order to achieve the above object, the present invention provides a hot water supply apparatus including a heating unit that heats water and a hot water storage tank that stores high-temperature water heated in the heating unit. The heat recovery means is provided for recovering the heat energy remaining in the hot water used for a predetermined application to the water heated in the heating unit by exchanging heat with the water heated in.

  As a result, the heat energy remaining in the hot water used for the predetermined application is recovered in the water heated in the heating unit, so that, for example, the hot water used for the predetermined application is used for the refrigerant flowing through the refrigerant circuit of the heat pump unit. There is no need to recover the remaining thermal energy.

  In order to achieve the above-mentioned object, the present invention allows a hot water storage tank for storing hot water supply water, a heating unit for heating water, and water in the lower part of the hot water storage tank to flow into the heating unit, and is heated in the heating unit. The first circulation circuit for returning the hot water to the upper part of the hot water storage tank, the heat exchanger for exchanging heat between the water in the hot water storage tank and the water used for a predetermined use, A second circulation circuit that flows into the exchanger and returns the heat exchanged in the heat exchanger to the hot water storage tank; and a third circulation circuit that circulates water used for a predetermined application to the heat exchanger. In the hot water supply apparatus, water in the lower part of the hot water storage tank is allowed to flow into the second circulation circuit and heat exchange is performed in a heat exchanger with water used for a predetermined application flowing through the third circulation circuit. Circulates in the second circulation circuit that exchanges heat with water used for The, a heat recovery means for returning to the top of the hot water storage tank is heated in the heating section by entering the first circulation circuit.

  Thereby, the heat energy of the remaining hot water in the bathtub is recovered by the water in the lower part of the hot water storage tank in the heat exchanger, and the water recovered from the thermal energy of the remaining hot water in the bathtub is heated in the heating unit and returned to the upper part of the hot water storage tank. Therefore, for example, it is not necessary for the refrigerant circulating in the refrigerant circuit of the heat pump unit to recover the thermal energy of the remaining hot water in the bathtub, and the heat exchanger for heating the water used for a predetermined application Thermal energy is recovered.

  According to the present invention, for example, it is not necessary for the refrigerant flowing through the refrigerant circuit of the heat pump unit to recover the thermal energy remaining in the hot water used for a predetermined application, and the remaining of the bathtub, for example, has a simple structure with only the water distribution pipe. The heat energy remaining in the hot water used for a predetermined application such as hot water can be used to heat the water stored in the hot water storage tank.

  1 to 4 show an embodiment of the present invention, FIG. 1 is a schematic configuration diagram of a hot water supply device, FIG. 2 is a schematic configuration diagram of a hot water supply device showing refrigerant and water flow paths during hot water storage operation, and FIG. 3 is a schematic configuration diagram of a hot water supply device showing a flow path of water during a chasing operation, and FIG. 4 is a schematic configuration diagram of the hot water supply device showing a flow path of refrigerant and water during a heat recovery hot water storage operation.

  This hot water supply apparatus includes a hot water storage tank 10 for storing hot water supply water and a heat pump unit 20 for heating the water stored in the hot water storage tank 10, and hot water stored in the hot water storage tank 10 is, for example, In addition to being used as hot water for hot water supply such as bathing and washing, it can be used as a heat source for reheating hot water stored in the bathtub 30 and for heating facilities.

  The hot water storage tank 10 is made of a member such as stainless steel and is formed in a cylindrical shape extending in the vertical direction with the upper and lower ends closed. In addition, the outside of the hot water storage tank 10 is covered with a heat insulating material such as glass wool or foamed urethane so that the movement of heat between the inside and the outside of the hot water storage tank 10 is blocked.

  The heat pump unit 20 includes an electric compressor 21, a gas cooler 22 as a heating unit, an expansion valve 23, and an evaporator 24, and these are sequentially connected by a refrigerant pipe made of copper or stainless steel to constitute a refrigerant circuit. . In addition, the refrigerant circuit is filled with carbon dioxide that is in a supercritical state on the high-pressure side as a refrigerant. Further, the evaporator 24 is provided with a blower 24a for circulating air that exchanges heat with the refrigerant.

  The hot water storage tank 10 includes a water supply pipe 11 for supplying water from the water supply to the hot water storage tank 10, a hot water supply pipe 12 for supplying hot water for hot water supply to a bathroom, a kitchen, and the like, and a low temperature of the hot water storage tank 10. A first circulation circuit 13 for heating water in the gas cooler 22 and returning it to the hot water storage tank 10, and a second circulation circuit 14 for chasing the hot water stored in the bathtub 30 with the hot water in the hot water storage tank 10 It is connected.

  The water supply pipe 11 is connected to the lower part of the hot water storage tank 10 so that water whose pressure has been reduced to a predetermined pressure by the pressure reducing valve 11 a flows into the hot water storage tank 10. The water supply pipe 11 is connected to a hot water supply pipe 12 in addition to the hot water storage tank 10.

  The hot water supply pipe 12 is connected to the upper part of the hot water storage tank 10, and the high temperature water in the upper part flows through the hot water supply pipe 12 by the pressure of the hot water flowing into the hot water storage tank 10. Further, a water supply pipe 11 is connected to the hot water supply pipe 12 via a first mixing valve 12 a, and a predetermined temperature obtained by mixing high temperature water flowing through the hot water supply pipe 12 and water flowing through the water supply pipe 11. The hot water is supplied to bathrooms and kitchens.

  The first circulation pipe 13 has a lower part of the hot water storage tank 10, a first circulation pump 13 a as a circulation pump, a gas cooler 22, and an upper part of the hot water storage tank 10 connected in order by a pipe, and the hot water storage tank 10 is connected by the first circulation pump 13 a. The water in the lower part of the water flows through the gas cooler 22 and flows into the upper part of the hot water storage tank 10.

  The second circulation circuit 14 has an upper part of the hot water storage tank 10, a heat exchanger 14 a, a second circulation pump 14 b, a check valve 14 c, and a substantially central part in the vertical direction of the hot water storage tank 10, which are sequentially connected. The high-temperature water at the upper part of the hot water storage tank 10 flows through the heat exchanger 14 a and flows into the vertical center in the hot water storage tank 10 by 14 b. The heat exchanger 14a exchanges heat between water flowing through the second circulation circuit 14 and hot water in the bathtub 30 flowing through the third circulation circuit 15 described later.

  In the third circulation circuit 15, the bathtub 30, the third circulation pump 15 a and the heat exchanger 14 a are sequentially connected, and the hot water in the bathtub 30 flows through the heat exchanger 14 a to the bathtub 30 by the third circulation pump 15 a. Inflow. In addition, one end side of a hot water filled pipe 16 for supplying hot water to the bathtub 30 is connected to the third circulation circuit 15 via a first three-way valve 16a.

  One end of the hot water filled pipe 16 is connected to the third circulation circuit 15 via the first three-way valve 16a, and the other end is connected to the water supply pipe 11 and the hot water supply pipe 12 via the second mixing valve 16b. Yes. That is, when the third circulation circuit 15 and the hot water filling pipe 16 are communicated with each other by the first three-way valve 16a, the water in the water supply pipe 11 and the hot water in the hot water supply pipe 12 are mixed by the first mixing valve 16b. It flows through the tension pipe 16 and the third circulation circuit 15 and is supplied into the bathtub 30.

  Further, the second circulation circuit 14 has one end side connected to the lower part of the hot water storage tank 10 and the other end side of the pipe 17 as a first communication pipe between the upper part of the hot water storage tank 10 and the inflow side of the heat exchanger 14a. An intermediate flow path is connected via a second three-way valve 17a as a first flow path switching valve. That is, high temperature water at the top of the hot water storage tank 10 or low temperature water at the bottom of the hot water storage tank 10 flows into the heat exchanger 14a by switching the second three-way valve 17a. Further, the second circulation circuit 14 has a third end serving as a second flow path switching valve on one end side of the flow path between the lower portion of the hot water storage tank 10 of the first circulation circuit 13 and the first circulation pump 13a. The other end of the pipe 18 as the second communication pipe connected via the three-way valve 18a is connected to a flow path between the outflow side of the heat exchanger 14a and the suction side of the second circulation pump 14b. Yes. That is, the flow path on the outflow side of the heat exchanger 14a of the second circulation circuit 14 is sucked by the first circulation pump 13a of the first circulation circuit 13 through the pipe 18 by switching the third three-way valve 18a. When the second circulation pump 14b is stopped and the first circulation pump 13a is operated, the water flowing out from the heat exchanger 14a of the second circulation circuit 14 is sucked into the first circulation pump 13a. Into the first circulation circuit 13.

  In the hot water supply apparatus configured as described above, when the normal hot water storage operation is performed, the first circulation pump 13a and the compressor 21 are operated. At this time, the third three-way valve 18a is set to a flow path that connects the lower part of the hot water storage tank 10 and the suction side of the first circulation pump 13a. As a result, as shown in FIG. 2, the refrigerant discharged from the compressor 21 flows into the evaporator 24 through the expansion valve 23 after flowing through the gas cooler 22, and the refrigerant flowing out of the evaporator 24 flows into the compressor. 21 is inhaled. The water in the lower part of the hot water storage tank 10 is heated by exchanging heat in the gas cooler 22 through the first circulation circuit 13 by the first circulation pump 13 a and stored in the upper part of the hot water storage tank 10. When the hot water in the hot water storage tank 10 reaches a predetermined amount, the first circulation pump 14a and the compressor 21 are stopped.

  The hot water in the upper part of the hot water storage tank 10 flows through the hot water supply pipe 12, is mixed with the water flowing through the water supply pipe 11 by the first mixing valve 12a, and is supplied as hot water of a predetermined temperature from a bathroom shower or kitchen faucet. Is done. Further, the hot water in the upper part of the hot water storage tank 10 is circulated through the water supply pipe 11 by the second mixing valve 16b by connecting the hot water filling pipe 16 and the third circulation circuit 15 by the first three-way valve 16a. And is supplied as hot water of a predetermined temperature to the bathtub 30 via the third circulation circuit 15. When the hot water in the hot water storage tank 10 is consumed, the water in the water supply pipe 11 flows into the hot water storage tank 10, so that the hot water storage tank 10 is always kept full.

  Moreover, when performing the reheating operation which heats the hot water in the bathtub 30, the 2nd circulation pump 14b and the 3rd circulation pump 15a are operated. At this time, the first three-way valve 16a is set to a flow path that connects the heat exchanger 14a and the bathtub 30. The second three-way valve 17a is set as a flow path that connects the upper part of the hot water storage tank 10 and the inflow side of the heat exchanger 14a. Further, the third three-way valve 18a is set as a flow path that connects the lower part of the hot water storage tank 10 and the suction side of the first circulation pump 13a. Thereby, as shown in FIG. 3, in the heat exchanger 14 a, the hot water flowing through the second circulation circuit 14 and the hot water in the bathtub 30 flowing through the third circulation circuit 15 exchange heat, and the inside of the bathtub 30 Of hot water is heated. The high-temperature water flowing through the second circulation circuit 14 is cooled by exchanging heat in the heat exchanger 14 a and returned to the substantially central portion in the vertical direction in the hot water storage tank 10.

  In addition, when performing a heat recovery hot water storage operation in which high temperature water is stored in the hot water storage tank 10 while recovering the thermal energy of the remaining hot water in the bathtub 30, the second circulation pump 14b is stopped and the first circulation pump 13a. And the third circulating pump 15a is operated. At this time, the first three-way valve 16a is set to a flow path that connects the heat exchanger 14a and the bathtub 30. The second three-way valve 17a is set as a flow path that connects the pipe 17 and the inflow side of the heat exchanger 14a. Further, the third three-way valve 18a is set to a flow path that connects the pipe 18 and the suction side of the first circulation pump 13a. As a result, as shown in FIG. 4, the water in the lower part of the hot water storage tank 10 flows through the pipe 17 by the first circulation pump 13a and flows into the heat exchanger 14a. In the heat exchanger 14a, the third circulation circuit 15 is heated by exchanging heat with the remaining hot water of the bathtub 30 that circulates through the water. The water heated by exchanging heat with the remaining hot water in the bathtub 30 flows through the pipe 18 and is heated in the gas cooler 22 and stored in the upper part of the hot water storage tank 10.

  As described above, according to the hot water supply apparatus of the present embodiment, the heat energy of the remaining hot water in the bathtub 30 is recovered by the water flowing out from the lower part of the hot water storage tank 10 heated by the gas cooler 22. It is not necessary for the refrigerant circulating in the refrigerant circuit to recover the thermal energy of the remaining hot water in the bathtub 30, and the thermal energy of the remaining hot water in the bathtub 30 is used for heating the water by a simple structure with only water distribution piping. Is possible.

  Further, the water in the lower part of the hot water storage tank 10 flows into the second circulation circuit 14 to exchange heat with the remaining hot water in the bathtub 30 flowing through the third circulation circuit in the heat exchanger 14a. The water flowing through the second circulation circuit 14 that exchanges heat with the remaining hot water flows into the first circulation circuit 13 and is heated in the gas cooler 22 so as to be returned to the upper part of the hot water storage tank 10, so that heat recovery is performed separately. The heat energy of the remaining hot water in the bathtub 30 can be recovered by the reheating heat exchanger 14a without the need for a heat exchanger, and the manufacturing cost can be reduced by reducing the number of parts. Is possible.

  In addition, a pipe 17 that circulates the lower part of the hot water storage tank 10 to the inflow side of the heat exchanger 14a of the second circulation circuit 14 and a flow path on the inflow side of the heat exchanger 14a of the second circulation circuit 14 are secondly connected. The second three-way valve 17a that switches to the circulation circuit 14 side or the piping 17 side, and the piping that connects the outflow side of the heat exchanger 14a of the second circulation circuit 14 to the inflow side of the gas cooler 22 of the first circulation circuit 13 18, a third three-way valve 18 a that switches the flow path on the outflow side of the heat exchanger 14 a of the second circulation circuit 14 to the second circulation circuit 14 side or the pipe 18 side, and the first circulation pump 13 a. Since the heat energy of the remaining hot water in the bathtub 30 is recovered, the heat energy of the remaining hot water can be recovered with a simple configuration, and the manufacturing cost can be reduced.

  In the above embodiment, the water flowing out from the lower part of the hot water storage tank 10 heated by the gas cooler 22 is recovered to recover the thermal energy of the remaining hot water in the bathtub 30, but for example, heated by the gas cooler 22. You may make it collect | recover the thermal energy of the hot water used as heat sources, such as floor heating and an air conditioner, in the water which flows out from the lower part of the hot water storage tank 10 to be.

The schematic block diagram of the hot-water supply apparatus which shows one Embodiment of this invention Schematic configuration diagram of hot water supply device showing refrigerant and water flow paths during hot water storage operation Schematic configuration diagram of a hot water supply device showing the flow path of water during the chasing operation Schematic configuration diagram of hot water supply device showing refrigerant and water flow paths during heat recovery hot water storage operation

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Hot water storage tank, 13 ... 1st circulation circuit, 14 ... 2nd circulation circuit, 14a ... Heat exchanger, 15 ... 3rd circulation circuit, 17 ... Piping, 17a ... 2nd three-way valve, 18 ... Piping , 18a ... third three-way valve, 20 ... heat pump unit, 22 ... gas cooler, 30 ... bathtub.

Claims (5)

  1. In a hot water supply apparatus comprising a heating unit for heating water and a hot water storage tank for storing high-temperature water heated in the heating unit,
    Heat recovery means for recovering the heat energy remaining in the hot water used in the predetermined application to the water heated in the heating part by exchanging heat between the hot water used in the predetermined application and the water heated in the heating unit A hot water supply apparatus characterized by comprising:
  2. A hot water storage tank that stores water for hot water supply, a heating unit that heats water, and water in the lower part of the hot water storage tank is allowed to flow into the heating part, and the water heated in the heating part is returned to the upper part of the hot water storage tank. A heat exchanger that exchanges heat between the circulation circuit, the water in the hot water storage tank and the water that is used for a predetermined purpose, and the water in the upper part of the hot water storage tank flow into the heat exchanger and exchange heat in the heat exchanger. In a hot water supply apparatus comprising: a second circulation circuit that returns water into the hot water storage tank; and a third circulation circuit that circulates water used for a predetermined application to the heat exchanger.
    The water in the lower part of the hot water storage tank flows into the second circulation circuit and is exchanged in the heat exchanger with the water used for the predetermined use flowing through the third circulation circuit, and is used for the predetermined use. Heat recovery means for supplying water flowing through the second circulation circuit exchanged with the water into the first circulation circuit, heating it in the heating section, and returning it to the upper part of the hot water storage tank. Hot water supply device.
  3. The heat recovery means includes a first communication pipe that communicates the lower part of the hot water storage tank with the inflow side of the heat exchanger of the second circulation circuit, and a flow path on the inflow side of the heat exchanger of the second circulation circuit. The first flow path switching valve that switches to the second circulation circuit side or the first communication pipe side and the outflow side of the heat exchanger of the second circulation circuit communicate with the inflow side of the heater of the first circulation circuit A second communication pipe, a second flow path switching valve for switching the flow path on the outflow side of the heat exchanger of the second circulation circuit to the second circulation circuit side or the second communication pipe side, The hot water supply device according to claim 2, comprising a circulation pump connected to the circulation circuit.
  4. The hot water supply apparatus according to claim 1, 2, or 3, wherein the remaining hot water stored in the bathtub is used as the water used for the predetermined application.
  5. The hot water supply apparatus according to claim 1, 2 or 3, wherein hot water used for floor heating or heating operation of an air conditioner is used as the water used for the predetermined application.
JP2006142620A 2006-05-23 2006-05-23 Water heater Pending JP2007315620A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2006142620A JP2007315620A (en) 2006-05-23 2006-05-23 Water heater

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2006142620A JP2007315620A (en) 2006-05-23 2006-05-23 Water heater
PCT/JP2007/059307 WO2007135843A1 (en) 2006-05-23 2007-05-01 Hot water supply device
EP20070742742 EP2020575A1 (en) 2006-05-23 2007-05-01 Hot water supply device

Publications (1)

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JP2007315620A true JP2007315620A (en) 2007-12-06

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Application Number Title Priority Date Filing Date
JP2006142620A Pending JP2007315620A (en) 2006-05-23 2006-05-23 Water heater

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EP (1) EP2020575A1 (en)
JP (1) JP2007315620A (en)
WO (1) WO2007135843A1 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009198119A (en) * 2008-02-22 2009-09-03 Denso Corp Hot water supply device
JP2009198115A (en) * 2008-02-22 2009-09-03 Mitsubishi Electric Corp Hot water storage type hot water supply system and control method of hot water storage type hot water supply system
JP2009216266A (en) * 2008-03-07 2009-09-24 Toshiba Carrier Corp Heat pump water heater
JP2010121843A (en) * 2008-11-19 2010-06-03 Panasonic Corp Heat pump water heater
JP2010196992A (en) * 2009-02-26 2010-09-09 Chofu Seisakusho Co Ltd Water heater
JP2010276220A (en) * 2009-05-26 2010-12-09 Chofu Seisakusho Co Ltd Hot water supply system
JP2013245919A (en) * 2012-05-29 2013-12-09 Mitsubishi Electric Corp Storage type water heater
US20150330662A1 (en) * 2012-12-13 2015-11-19 Robert Bosch Gmbh Heating device and method for operating the same

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0624220D0 (en) * 2006-12-04 2007-01-10 Inst Of Plumbing & Heating Eng Heat recovery system and method
GB201010097D0 (en) * 2010-06-16 2010-07-21 Gilbert Patrick C Flow rate balancing devices
EP2423605A1 (en) * 2010-08-24 2012-02-29 C.P. Comercial Prestcold, S.A. Combined cold, heat and domestic hot water (DHW) climatization system

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Publication number Priority date Publication date Assignee Title
JPS58145833A (en) * 1982-02-24 1983-08-31 Matsushita Electric Ind Co Ltd Solar heat hot water feeder
JPH0972612A (en) * 1995-09-08 1997-03-18 Matsushita Electric Ind Co Ltd Hot water storage type hot water supply equipment
JPH10318604A (en) * 1997-05-21 1998-12-04 Matsushita Electric Ind Co Ltd Heat pump type hot water supply system for bath
JP2001059626A (en) * 1999-08-20 2001-03-06 Noritz Corp Hot water supply system

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JP3632401B2 (en) 1997-10-21 2005-03-23 松下電器産業株式会社 Heat pump bath water supply system

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Publication number Priority date Publication date Assignee Title
JPS58145833A (en) * 1982-02-24 1983-08-31 Matsushita Electric Ind Co Ltd Solar heat hot water feeder
JPH0972612A (en) * 1995-09-08 1997-03-18 Matsushita Electric Ind Co Ltd Hot water storage type hot water supply equipment
JPH10318604A (en) * 1997-05-21 1998-12-04 Matsushita Electric Ind Co Ltd Heat pump type hot water supply system for bath
JP2001059626A (en) * 1999-08-20 2001-03-06 Noritz Corp Hot water supply system

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009198119A (en) * 2008-02-22 2009-09-03 Denso Corp Hot water supply device
JP2009198115A (en) * 2008-02-22 2009-09-03 Mitsubishi Electric Corp Hot water storage type hot water supply system and control method of hot water storage type hot water supply system
JP2009216266A (en) * 2008-03-07 2009-09-24 Toshiba Carrier Corp Heat pump water heater
JP2010121843A (en) * 2008-11-19 2010-06-03 Panasonic Corp Heat pump water heater
JP2010196992A (en) * 2009-02-26 2010-09-09 Chofu Seisakusho Co Ltd Water heater
JP2010276220A (en) * 2009-05-26 2010-12-09 Chofu Seisakusho Co Ltd Hot water supply system
JP2013245919A (en) * 2012-05-29 2013-12-09 Mitsubishi Electric Corp Storage type water heater
US20150330662A1 (en) * 2012-12-13 2015-11-19 Robert Bosch Gmbh Heating device and method for operating the same

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WO2007135843A1 (en) 2007-11-29
EP2020575A1 (en) 2009-02-04

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