WO2018020804A1 - 暖房給湯装置 - Google Patents
暖房給湯装置 Download PDFInfo
- Publication number
- WO2018020804A1 WO2018020804A1 PCT/JP2017/019340 JP2017019340W WO2018020804A1 WO 2018020804 A1 WO2018020804 A1 WO 2018020804A1 JP 2017019340 W JP2017019340 W JP 2017019340W WO 2018020804 A1 WO2018020804 A1 WO 2018020804A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- hot water
- water supply
- heat exchanger
- heating
- passage
- Prior art date
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 244
- 238000010438 heat treatment Methods 0.000 title claims abstract description 115
- 238000002485 combustion reaction Methods 0.000 claims abstract description 27
- 239000008236 heating water Substances 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract description 10
- 239000008399 tap water Substances 0.000 abstract description 2
- 235000020679 tap water Nutrition 0.000 abstract description 2
- 230000001105 regulatory effect Effects 0.000 abstract 2
- 239000000567 combustion gas Substances 0.000 description 13
- 239000002737 fuel gas Substances 0.000 description 9
- 239000007789 gas Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000008400 supply water Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/08—Hot-water central heating systems in combination with systems for domestic hot-water supply
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
- F24D19/1015—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
- F24D19/1015—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves
- F24D19/1021—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves a by pass valve
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1066—Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water
- F24D19/1069—Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water regulation in function of the temperature of the domestic hot water
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/48—Water heaters for central heating incorporating heaters for domestic water
- F24H1/52—Water heaters for central heating incorporating heaters for domestic water incorporating heat exchangers for domestic water
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/20—Control of fluid heaters characterised by control inputs
- F24H15/238—Flow rate
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
- F24H15/305—Control of valves
- F24H15/31—Control of valves of valves having only one inlet port and one outlet port, e.g. flow rate regulating valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
- F24H15/335—Control of pumps, e.g. on-off control
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
- F24H15/355—Control of heat-generating means in heaters
- F24H15/36—Control of heat-generating means in heaters of burners
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D2220/00—Components of central heating installations excluding heat sources
- F24D2220/04—Sensors
- F24D2220/042—Temperature sensors
Definitions
- the present invention relates to a heating and hot water supply apparatus that performs heating by heating a heating medium with combustion heat and heats fresh water by heat exchange with the heating medium, and particularly performs heating operation and hot water supply operation at the same time. It relates to a possible heating and hot water supply apparatus.
- a heating and hot water supply apparatus that switches between a heating operation and a hot water supply operation has been widely used.
- a hot water supply apparatus during a hot water supply operation, the fuel is burned, the heating heat medium is heated by the heat exchanger, and the heating heat medium is circulated between the heat exchanger and the hot water supply heat exchanger.
- the heat exchanger a fin-and-tube heat exchanger that recovers sensible heat of the combustion gas is used, and there is also a heat exchanger that can heat the heating heat medium using the latent heat of the combustion gas.
- a plate heat exchanger in which a plurality of plates are stacked in the front-rear direction and a fluid passage is formed between the plates is generally used.
- a pair of connection portions 129 and 130 of the passage through which the heating heat medium flows are provided on the front surface portion and the rear surface portion of the hot water supply heat exchanger 120, respectively.
- a pair of connecting portions 131 and 132 of the hot water supply passage are provided on the front surface portion and the rear surface portion of the hot water supply heat exchanger 120, respectively.
- hot water flowing in the hot water supply passage is heated by heat exchange with the heating heat medium, and the heated hot water is supplied.
- the circulation path of the heating heat medium is switched by a three-way valve so that the heating heat medium circulates between the heating terminal and the heat exchanger.
- the heating medium heated by the heat exchanger returns to the heat exchanger again after radiating heat at the heating terminal.
- the distribution valve is generally larger than the three-way valve, the distribution valve is usually provided in a heating hot water supply apparatus configured to have a minimum space necessary for assembly and maintenance work. It is difficult to secure and replace the space. In addition, it is not preferable to enlarge the heating / hot water supply device in order to replace the three-way valve with the distribution valve and to secure the installation space for the distribution valve, because the manufacturing cost increases.
- An object of the present invention is to provide a hot water supply heat exchanger that can secure an installation space for a distribution valve, a bypass passage, and a bypass flow rate adjusting means without increasing the size of a heating and hot water supply device, and enables simultaneous operation of heating and hot water and a hot water supply temperature. It is providing the heating hot-water supply apparatus which enables appropriate control of.
- the heating and hot water supply apparatus includes a combustion means, a heat exchanger, a circulation passage connecting the heat exchanger and the heating terminal, a circulation pump provided in the circulation passage, and a branch from the circulation passage.
- a first bypass passage that bypasses the heating terminal, a hot water supply heat exchanger provided in the first bypass passage, and hot water is supplied to the hot water supply heat exchanger and heated by the hot water supply heat exchanger.
- a distribution means is provided at a branch portion of the first bypass passage, and the distribution means is configured to perform a heating operation, a hot water supply operation, and a heating and hot water simultaneous operation.
- the distribution ratio can be adjusted to enable each operation, and the hot water supply passage is provided with a second bypass passage that bypasses the hot water supply heat exchanger, and the bypass flow rate flowing through the second bypass passage is adjusted.
- the hot water supply heat exchanger is constituted by a plate heat exchanger, and a pair of connection portions of the first bypass passage and a pair of hot water supply passages are connected to one side surface portion thereof. It is characterized by the arrangement of parts.
- the heat exchanger for hot water supply is a plate heat exchanger, and a pair of connection portions of the first bypass passage and a pair of connection portions of the hot water passage are disposed on one side surface portion thereof.
- the heat exchanger for hot water supply can be made compact.
- a hot water supply heat exchanger is disposed so that a space on one side surface side of the hot water supply heat exchanger is expanded, and an installation space for the distributing means, the second bypass passage, and the flow rate adjusting means thereof is secured. Can do. Since a distribution valve capable of adjusting the distribution ratio is provided in this installation space, not only switching between heating operation and hot water supply operation but also simultaneous heating and hot water supply operation is possible.
- the second bypass passage and the flow rate adjusting means are provided in the installation space, the hot water heated by the hot water supply heat exchanger and the tap water adjusted in the flow rate can be mixed to appropriately control the supply temperature. Therefore, it is possible to secure the installation space for the distribution valve, the second bypass passage, and the flow rate adjusting means without enlarging the heating and hot water supply device, and to realize simultaneous heating and hot water supply operation and appropriate hot water temperature control.
- the heat exchanger for hot water supply may be connected so that the heating heat medium and hot water supply flow oppositely.
- the heat exchange efficiency in the hot water heat exchanger is improved.
- the hot water supply heat exchanger is disposed to be spaced upward from a bottom plate of a case of the heating hot water supply apparatus, and a part of the second bypass passage is disposed between the hot water supply heat exchanger and the bottom plate. Also good.
- the hot water in the second bypass passage becomes difficult to be heated, which is advantageous in preventing high temperature hot water.
- the installation space of the hot water supply heat exchanger is made compact by providing the hot water supply heat exchanger disposed on one side surface of the connecting portion, and the distribution valve and A space for installing the second bypass passage and its flow rate adjusting means can be secured, and a heating and hot water supply apparatus capable of simultaneously controlling the heating and hot water supply and appropriately controlling the hot water temperature can be provided.
- FIG. It is a perspective view of the conventional heat exchanger for hot water supply.
- the arrow U indicates the upper direction
- the arrow F indicates the front
- the arrow L indicates the left.
- the heating hot water supply device 1 performs a heating operation by circulating a heating heat medium heated by heat exchange with the combustion gas generated in the combustion unit 2 with a heating terminal (not shown).
- a hot water supply operation is performed in which the hot water heated by the heat exchange is adjusted to a hot water supply set temperature to supply hot water.
- the heating water heater 1 includes a combustion unit 2 that is a combustion unit that mixes and burns fuel gas and air, a heat exchanger 10 that heats the heating heat medium by heat exchange with the combustion gas generated by the combustion, and heat exchange.
- the heating and hot water supply apparatus 1 includes a first bypass passage 12 branched from the circulation passage 4 to bypass the heating terminal, a hot water supply heat exchanger 20 provided in the first bypass passage 12, and the hot water supply heat exchange.
- a hot water supply passage 21 and the like for supplying hot water heated by the hot water supply heat exchanger 20 and the like are provided.
- a branch portion between the circulation passage 4 and the first bypass passage 12 is provided with a first distribution valve 15 serving as distribution means.
- the heating and hot water supply apparatus 1 includes a control unit 7 that receives a detection signal from a temperature sensor or the like, and operates the equipment to control the heating operation, the hot water supply operation, and the like.
- the case 8 is provided.
- the circulation passage 4, the hot water supply passage 21, and the like pass through the case 8 and are connected to a heating terminal, an external hot water tap, and the like.
- the combustion unit 2 blows in an intake passage 40 that takes in combustion air, a fuel gas passage 41 that supplies fuel gas supplied from the outside to the intake passage 40, and a mixed gas of air and fuel gas in the intake passage 40
- a combustion fan 42 and a burner 43 for burning the mixed gas fed by the combustion fan 42 are provided.
- the flow rate of combustion air is controlled by the rotational speed of the combustion fan 42.
- a venturi mixer 44 is provided at the downstream end of the fuel gas passage 41, and the flow rate of the fuel gas supplied is controlled by the rotational speed of the combustion fan 42.
- An electromagnetic valve 45 is provided in the fuel gas passage 41, and the fuel gas is supplied and stopped by opening and closing the electromagnetic valve 45.
- the burner 43 ignites the mixed gas sent by the combustion fan 42 by an ignition device 46 provided below the burner 43 and starts combustion.
- a combustion sensor 47 that detects the combustion state is provided below the burner 43.
- the heat exchanger 10 is disposed below the ignition device 46 and the combustion sensor 47.
- the heat exchanger 10, the burner 43, and the like are accommodated in a can body 48 that forms a combustion gas passage.
- the combustion gas generated by the combustion of the mixed gas in the burner 43 is sent to the heat exchanger 10, exchanges heat with the heating heat medium, and then is exhausted to the outside through the exhaust passage 49 extending from the lower portion of the can body 48.
- the An exhaust temperature sensor 50 capable of detecting the temperature of the exhausted combustion gas is provided at the downstream end of the exhaust passage 49.
- the heat exchanger 10 includes a primary heat exchanger 10a that recovers the sensible heat of the combustion gas, and a secondary heat exchanger 10b that recovers the latent heat of the combustion gas.
- the two heat exchangers are connected so that the heating heat medium heated by the secondary heat exchanger 10b is further heated by the primary heat exchanger 10a.
- a drainage passage 51 for discharging drain water generated in the secondary heat exchanger 10 b to the outside is provided at the bottom of the can body 48.
- a drain trap 52 is provided at the downstream end of the drain passage 51 to prevent the combustion gas from flowing out.
- a first temperature sensor 13 capable of detecting the temperature of the heating heat medium flowing into the heat exchanger 10 is provided.
- a second temperature sensor 14 that can detect the temperature of the heating medium heated by the heat exchanger 10 is provided on the downstream side of the heat exchanger 10.
- a first distribution valve 15 is provided at a branch portion of the first bypass passage 12 branched from the circulation passage 4 on the downstream side of the heat exchanger 10.
- the first distribution valve 15 can distribute the heating medium heated by the heat exchanger 10 to the circulation passage 4 and the first bypass passage 12 by adjusting a distribution ratio.
- the first bypass passage 12 joins the circulation passage 4 on the upstream side of the circulation pump 11.
- a pressure release valve 16 for releasing the pressure in the circulation passage 4 is provided between the heat exchanger 10 and the first distribution valve 15.
- a heating return temperature sensor 17 capable of detecting the temperature of the heating heat medium returning from the heating terminal is provided on the upstream side of the circulation pump 11. Further, a replenishment passage 18 for replenishing the heating heat medium is connected between the circulation pump 11 and the heating return temperature sensor 17.
- the hot water supply passage 21 can supply clean water to the hot water supply heat exchanger 20 and can supply hot water heated by the hot water supply heat exchanger 20 to a hot water tap or the like.
- a second bypass passage 22 that bypasses the hot water supply heat exchanger 20 is provided.
- a branch portion between the hot water supply passage 21 and the second bypass passage 22 is provided with a second distribution valve 23 corresponding to a flow rate adjusting means.
- the second distribution valve 23 can distribute the drinking water to the hot water supply passage 21 and the second bypass passage 22 by adjusting the distribution ratio. Therefore, the second distribution valve 23 can adjust the flow rate of clean water flowing through the hot water supply passage 21.
- a flow rate adjustment valve 24 can adjust the flow rate of clean water entering the second distribution valve 23.
- the hot water supply amount sensor 25 can detect the adjusted flow rate of clean water.
- the incoming water temperature sensor 26 can detect the temperature of the incoming water entering the second distribution valve 23.
- a hot water temperature sensor 27 is provided between the hot water supply passage 21 and the second bypass passage 22 and the hot water supply heat exchanger 20.
- the hot water temperature sensor 27 can detect the temperature of hot water discharged from the hot water supply heat exchanger 20.
- a hot water supply temperature sensor 28 is provided downstream of the hot water supply passage 21, the second bypass passage 22, and the junction. The hot water temperature sensor 28 can detect the temperature of the hot water in which the hot water heated by the hot water heat exchanger 20 and the clean water flowing through the second bypass passage 22 are mixed.
- the hot water supply heat exchanger 20 provided in the first bypass passage 12 is a plate heat exchanger.
- a plurality of heat exchange plates are stacked to form a passage between the heat exchange plates.
- the heating heat medium and the hot water flow every other passage between the heat exchange plates so as to face each other without being mixed with each other.
- Each heat exchange plate is provided with irregularities to increase the surface area and improve the heat exchange efficiency.
- the heat exchanger 20 for hot water supply is connected to the first bypass passage 12 at one side surface, for example, the front surface portion, and a pair of connection portions 29 serving as an inlet and an outlet of the heating heat medium, 30 and a pair of connecting portions 31 and 32 that are connected to the hot water supply passage 21 and serve as an inlet and an outlet of hot water.
- the heating-heat-medium inlet connection 29 and the hot water supply are connected to one end of the hot-water supply heat exchanger 20, for example, the right end so that the heating-heat medium and hot-water supply flow oppositely in the hot-water supply heat exchanger 20.
- a water outlet connecting portion 32 is provided, and a heating heat medium outlet connecting portion 30 and a hot water inlet inlet connecting portion 31 are provided on the other end side, for example, the left end side.
- the hot water supply heat exchanger 20 includes a plurality of mounting brackets 33 and 34 on the rear surface.
- the hot water supply heat exchanger 20 is spaced upward from the bottom plate 8 a of the case 8, and a mounting bracket 34 provided on the hot water supply heat exchanger 20 is provided on the rear surface portion 8 b of the case 8. For example, it is fixed to the mounting portion 8c with screws 35. Although not shown, the mounting bracket 33 is similarly fixed to the mounting portion with screws or the like.
- a part of the hot water supply passage 21 and a part of the second bypass passage 22 are disposed in the space between the hot water heat exchanger 20 and the bottom plate 8a.
- the first and second distribution valves 15, 23 and the flow rate adjustment valve 24 are omitted.
- the control unit 7 and the like are disposed. As described above, since the space in front of the hot water supply heat exchanger 20 is expanded, the first and second distribution valves 15 and 23 can be disposed, and work space can be secured, so that maintainability is improved. improves.
- control unit 7 is connected to be able to receive a detection signal from a temperature sensor or the like provided in the heating and hot water supply apparatus 1 and to be able to control the circulation pump 11, the first distribution valve 15, and the like. Moreover, it connects so that communication with the operating device provided in the room is possible.
- the operating device includes a display unit that can display, for example, temperature, operation status, and the like, and an operation unit for performing a setting operation for heating temperature and hot water supply temperature, a start / stop operation for heating operation, and the like.
- the control unit 7 adjusts the first distribution valve 15 so that the heating heat medium is circulated only in the circulation passage 4, and operates the circulation pump 11 to supply the heating heat medium.
- the combustion fan 42 and the ignition device 46 are operated to burn the mixed gas in the burner 43.
- the generated combustion gas heats the heating heat medium in the heat exchanger 10.
- the heating heat medium is heated to a predetermined temperature and circulates.
- the hot water supply operation is started.
- the control unit 7 adjusts the first distribution valve 15 so that the heating heat medium is circulated only through the first bypass passage 12 and operates the circulation pump 11 to circulate the heating heat medium.
- the combustion fan 42 and the ignition device 46 are operated to burn the fuel gas in the burner 43.
- the heating heat medium is heated in the heat exchanger 10 by the combustion gas thus generated, and the hot water supply water is heated by the heating heat medium in the hot water supply heat exchanger 20.
- the control unit 7 adjusts the distribution ratio of the second distribution valve 23 based on the hot water temperature detected by the hot water temperature sensor 27, the hot water temperature detected by the hot water temperature sensor 28, and the like in order to adjust the hot water to the hot water set temperature. Adjust.
- the hot water heated by the hot water heat exchanger 20 and the clean water passing through the second bypass passage 22 are mixed at a ratio adjusted by the second distribution valve 23 so that the hot water temperature becomes the set hot water temperature. It can be controlled appropriately.
- the control unit 7 adjusts the first distribution valve 15 so that the heating heat medium is circulated only through the first bypass passage 12, and the heating heat medium is supplied to the first heating valve.
- the hot water is heated in the hot water heat exchanger 20 by circulating through the bypass passage 12.
- the control unit 7 adjusts the hot water supply water to the hot water supply set temperature as described above. Further, when the control unit 7 determines that the simultaneous heating / hot water supply operation is possible based on the hot water supply set temperature, the tapping temperature, etc., the heating / hot water supply simultaneous operation can be performed by changing the distribution ratio of the first distribution valve 15.
- the heating and hot water supply apparatus 1A can adjust the bypass flow rate by a bypass flow rate adjustment valve 23A provided in the second bypass passage 22A instead of the second distribution valve 23 that is a flow rate adjustment unit of the second bypass passage 22 of the first embodiment. It is configured.
- the second bypass passage 22A is branched from between a flow rate adjustment valve 24A provided in the hot water supply passage 21A and a hot water supply amount sensor 25A.
- the control unit 7A adjusts the hot water supply temperature to the hot water supply set temperature based on the hot water temperature detected by the hot water temperature sensor 27A, the hot water temperature detected by the hot water temperature sensor 28A, and the like. And the flow rate ratio between the flow rate adjusting valve 24A and the flow rate adjusting valve 24A are adjusted.
- the hot water heated by the hot water heat exchanger 20A and the clean water passing through the second bypass passage 22A are mixed at an adjusted ratio, and the hot water temperature can be appropriately controlled so as to become the hot water set temperature. it can.
- the hot water supply heat exchanger 20 may be attached to a side surface portion other than the rear surface portion 8 b of the case 8.
- the burner 43 may be of an upward combustion type so that the heat of the combustion gas flowing upward can be recovered.
- Heating hot water supply device Combustion part (combustion means) 4 Circulating passage 7 Control unit 8 Case 8a Bottom plate 10 Heat exchanger 11 Circulating pump 12 First bypass passage 15 First distribution valve (distribution means) 20 Heat Exchanger for Hot Water Supply 21 Hot Water Supply Passage 22 Second Bypass Passage 23 Second Distribution Valve (Flow Rate Adjustment Means) 23A Bypass flow rate adjustment valve 24 Flow rate adjustment valve 25 Hot water supply amount sensor 29, 30 Connection portion 31, 32 Connection portion
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid Mechanics (AREA)
- Water Supply & Treatment (AREA)
- Steam Or Hot-Water Central Heating Systems (AREA)
Abstract
Description
暖房給湯装置1は、燃焼部2で発生した燃焼ガスとの熱交換により加熱された暖房熱媒を、図示を省略するが暖房端末との間で循環させて暖房運転を行い、暖房熱媒との熱交換により加熱された上水を給湯設定温度に調節して給湯する給湯運転を行う。
燃焼部2は、燃焼用の空気を取り入れる吸気通路40と、外部から供給される燃料ガスを吸気通路40に供給する燃料ガス通路41と、吸気通路40の空気と燃料ガスの混合ガスを送風する燃焼ファン42と、燃焼ファン42により送り込まれた混合ガスを燃焼させるバーナ43等を備えている。
循環通路4に設けられた循環ポンプ11と熱交換器10の間には、熱交換器10に流入する暖房熱媒の温度を検知可能な第1温度センサ13が設けられている。熱交換器10の下流側には、熱交換器10で加熱された暖房熱媒の温度を検知可能な第2温度センサ14が設けられている。
給湯通路21は、給湯用熱交換器20に上水を供給可能であると共に、給湯用熱交換器20で加熱された給湯水を給湯栓等に給湯可能であり、給湯通路21から分岐して給湯用熱交換器20をバイパスする第2バイパス通路22を備えている。給湯通路21と第2バイパス通路22の分岐部には、流量調整手段に相当する第2分配弁23が設けられている。第2分配弁23は、給湯通路21と第2バイパス通路22に分配比を調節して上水を分配可能である。そのため、第2分配弁23は、給湯通路21を流れる上水の流量を調整可能である。
第1バイパス通路12に設けられた給湯用熱交換器20は、プレート式熱交換器である。プレート式熱交換器は、複数枚の熱交換プレートが積層されて熱交換プレート間に通路が形成されている。給湯用熱交換器20内では、暖房熱媒と給湯水は、互いに混ざり合うことなく対向するように熱交換プレート間の通路を一つ置きに流れる。夫々の熱交換プレートには、表面積を広げて熱交換効率を向上させるために凹凸が形成されている。
制御部7は、図示を省略するが、暖房給湯装置1内に設けられた温度センサ等の検知信号を受信可能に、且つ循環ポンプ11や第1分配弁15等を制御可能に接続されている。また、室内に設けられた操作装置との通信が可能なように接続されている。操作装置は、例えば温度や運転状況等を表示可能な表示部と、暖房温度や給湯温度の設定操作や暖房運転の開始・停止操作等を行うための操作部を備えている。
操作装置の操作により暖房運転が開始されると、制御部7は暖房熱媒を循環通路4にのみ循環させるように第1分配弁15を調節し、循環ポンプ11を作動させて暖房熱媒を循環させると共に、燃焼ファン42と点火装置46を作動させてバーナ43で混合ガスを燃焼させる。発生した燃焼ガスは熱交換器10において暖房熱媒を加熱する。暖房運転の継続により暖房熱媒は所定温度に加熱されて循環するようになる。
暖房給湯装置1Aは、実施例1の第2バイパス通路22の流量調整手段である第2分配弁23の代わりに、第2バイパス通路22Aに設けられたバイパス流量調整弁23Aによりバイパス流量を調整可能に構成されている。第2バイパス通路22Aは、給湯通路21Aに設けられた流量調整弁24Aと給湯水量センサ25Aの間から分岐されている。
給湯運転において、制御部7Aは給湯水を給湯設定温度に調節するために、出湯温度センサ27Aに検知される出湯温度や給湯温度センサ28Aに検知される給湯温度等に基づいてバイパス流量調整弁23Aと流量調整弁24Aとの流量比を調節する。これにより給湯用熱交換器20Aで加熱された給湯水と第2バイパス通路22Aを通る上水とが調節された比率で混合され、給湯温度が給湯設定温度になるように適切に制御することができる。
[1]給湯用熱交換器20は、ケース8の後面部8b以外の側面部に取り付けられてもよい。
[2]バーナ43を上向き燃焼方式のものにし、上方に流れる燃焼ガスの熱を回収可能なように構成されてもよい。
[3]その他、当業者であれば、本発明の趣旨を逸脱することなく、前記実施形態に種々の変更を付加した形態で実施可能であり、本発明はそのような変更形態を包含するものである。
2 燃焼部(燃焼手段)
4 循環通路
7 制御部
8 ケース
8a 底板
10 熱交換器
11 循環ポンプ
12 第1バイパス通路
15 第1分配弁(分配手段)
20 給湯用熱交換器
21 給湯通路
22 第2バイパス通路
23 第2分配弁(流量調整手段)
23A バイパス流量調整弁
24 流量調整弁
25 給湯水量センサ
29,30 接続部
31,32 接続部
Claims (3)
- 燃焼手段と、熱交換器と、前記熱交換器と暖房端末とを接続する循環通路と、この循環通路に設けられた循環ポンプと、前記循環通路から分岐されて前記暖房端末をバイパスする第1バイパス通路と、この第1バイパス通路に設けられた給湯用熱交換器と、この給湯用熱交換器に上水を供給すると共に前記給湯用熱交換器で加熱された給湯水を給湯するための給湯通路とを備えた暖房給湯装置において、
前記第1バイパス通路の分岐部には分配手段が設けられ、この分配手段は暖房運転と給湯運転と暖房給湯同時運転の各運転が可能となるように分配比を調節可能であり、
前記給湯通路には前記給湯用熱交換器をバイパスする第2バイパス通路が設けられ、この第2バイパス通路を流れるバイパス流量を調整可能な流量調整手段が設けられ、
前記給湯用熱交換器はプレート式熱交換器で構成され、その一側面部に前記第1バイパス通路の1対の接続部と前記給湯通路の1対の接続部が配置されたことを特徴とする暖房給湯装置。 - 前記給湯用熱交換器は、暖房熱媒と給湯水とが対向して流れるように接続されていることを特徴とする請求項1に記載の暖房給湯装置。
- 前記給湯用熱交換器は、前記暖房給湯装置のケースの底板から上方に離隔して配置され、前記給湯用熱交換器と前記底板の間に前記第2バイパス通路の一部が配設されたことを特徴とする請求項1または2に記載の暖房給湯装置。
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AU2017304849A AU2017304849A1 (en) | 2016-07-26 | 2017-05-24 | Heating and hot water supplying device |
US16/318,370 US10989442B2 (en) | 2016-07-26 | 2017-05-24 | Heating and hot water supply device |
CN201780046056.2A CN109564008A (zh) | 2016-07-26 | 2017-05-24 | 供暖热水供给装置 |
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JP7283029B2 (ja) * | 2019-10-25 | 2023-05-30 | 株式会社ノーリツ | 暖房給湯装置 |
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US20190154304A1 (en) | 2019-05-23 |
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