WO2018020805A1 - Heating and hot water supplying device - Google Patents

Heating and hot water supplying device Download PDF

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Publication number
WO2018020805A1
WO2018020805A1 PCT/JP2017/019341 JP2017019341W WO2018020805A1 WO 2018020805 A1 WO2018020805 A1 WO 2018020805A1 JP 2017019341 W JP2017019341 W JP 2017019341W WO 2018020805 A1 WO2018020805 A1 WO 2018020805A1
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WO
WIPO (PCT)
Prior art keywords
hot water
water supply
heating
passage
heat exchanger
Prior art date
Application number
PCT/JP2017/019341
Other languages
French (fr)
Japanese (ja)
Inventor
啓史 森本
康資 森田
靖隆 栗山
碧 横山
佳久 北野
Original Assignee
株式会社ノーリツ
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.)
Filing date
Publication date
Application filed by 株式会社ノーリツ filed Critical 株式会社ノーリツ
Priority to CN201780046008.3A priority Critical patent/CN109564007B/en
Priority to AU2017304850A priority patent/AU2017304850B2/en
Priority to US16/318,371 priority patent/US20190234653A1/en
Publication of WO2018020805A1 publication Critical patent/WO2018020805A1/en

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    • 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
    • F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
    • 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
    • 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
    • F24D3/00—Hot-water central heating systems
    • F24D3/18—Hot-water central heating systems using heat pumps
    • 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
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/12—Heat pump
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/12—Hot water central heating systems using heat pumps

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.
  • Such a heating hot water supply apparatus includes, for example, a heat exchanger and a heating terminal as shown in Patent Document 1, and a circulation passage for circulating a heating heat medium between the heat exchanger and the heating terminal by a circulation pump, A bypass passage that branches off from the circulation passage and bypasses the heating terminal is provided.
  • the bypass passage is provided with a heat exchanger for hot water supply, and the hot water flowing through the hot water passage passing through the heat exchanger for hot water supply can be heated by a heating heat medium.
  • a distribution flow rate adjusting means is provided at a branch portion between the circulation passage and the bypass passage, and the distribution ratio of the heating heat medium toward the heating terminal and the heating heat medium toward the hot water supply heat exchanger can be adjusted.
  • the distribution flow rate adjusting means is adjusted so that the heating heat medium is heated by the heat exchanger and the heating heat medium is circulated in the circulation passage.
  • the heated heating heat medium radiates heat at the heating terminal and returns to the heat exchanger.
  • the distribution flow rate adjusting means is adjusted so that part or all of the heated heating medium is circulated in the bypass passage, and the hot water supply heat exchanger provided in the bypass passage flows through the hot water passage. Heat the hot water to supply hot water.
  • a hot water supply operation is performed by switching so that the heating heat medium is circulated through the bypass passage by a three-way valve provided instead of the distribution valve.
  • the hot water supply passage is provided with a hot water supply bypass passage that bypasses the hot water heat exchanger, and hot water heated by the hot water heat exchanger and hot water flowing through the hot water bypass passage are mixed to adjust the hot water supply temperature.
  • a hot water supply bypass passage is provided with a bypass valve to adjust the flow rate of hot water flowing through the hot water supply bypass passage, and the hot water and heated hot water are mixed to adjust the hot water supply temperature.
  • a mixing valve is provided at the junction of the hot water supply passage and the hot water supply bypass passage to adjust the mixing ratio of heated hot water and clean water, and the heated hot water and clean water are mixed to adjust the hot water supply temperature.
  • a high-temperature heating heat medium circulates between the heating terminal and the heat exchanger.
  • a distribution valve or a three-way valve provided at a branch portion between the circulation passage and the bypass passage is not an expensive distribution valve or a three-way valve having a closing function in general, but a heating heat medium to the bypass passage during heating operation. The outflow cannot be stopped completely. Therefore, the hot water in the hot water supply heat exchanger is heated by the high-temperature heating heat medium that has flowed into the bypass passage by the heating operation.
  • the temperature of the hot water in the hot water passage rises due to the transfer of hot water.
  • the temperature of hot water in the hot water supply passage and the hot water supply bypass passage on the upstream side and the downstream side of the heat exchanger for hot water supply rises due to heat transfer. If hot water supply is started in this state, the hot water temperature in the hot water supply passage and the hot water supply bypass passage is high after the start of hot water supply.
  • the distribution valve or three-way valve provided at the branch portion of the circulation passage and bypass passage should be a distribution valve or three-way valve with a closing function so that the heating heat medium does not flow out. Is not preferable because the manufacturing cost increases.
  • An object of the present invention is to provide a heating and hot water supply apparatus that can avoid high-temperature hot water discharge even when hot water is supplied during heating operation without using a distribution valve or a three-way valve with a closing function.
  • 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 the branch portion of the first bypass passage, and the distribution means is provided for each of the heating operation, the hot water supply operation, and the heating and hot water simultaneous operation.
  • the distribution ratio can be adjusted to enable operation, and the hot water supply passage is provided with a second bypass passage that bypasses the hot water heat exchanger, and the flow rate is set upstream from the branch portion of the second bypass passage.
  • Detection Provided with a flow rate adjusting means for the hot water supply passage on the downstream side of the branching section or on the upstream side of the hot water heat exchanger, and the hot water supply passage is closed by the flow rate adjusting means during heating operation. It is characterized by that.
  • the hot water supply passage is closed by the flow rate adjusting means during the heating operation, the heat transfer of the hot water is suppressed by the flow rate adjusting means. Therefore, even if the temperature of the hot water in the hot water supply passage rises via the hot water supply heat exchanger due to the heating heat medium flowing out from the distribution means during the heating operation, the temperature rise of the hot water upstream from the flow rate adjusting means is suppressed. be able to.
  • hot water supply is started in this state, hot water whose temperature rise is suppressed is supplied through the second bypass passage, so that high temperature hot water can be avoided.
  • the flow rate adjusting means may be a distribution valve provided in the branch portion.
  • the hot water supply passage is closed by the distribution valve and the second bypass passage is opened. Therefore, even if the temperature of the hot water in the hot water supply passage is increased by the heating heat medium during the heating operation, heat transfer is suppressed by the distribution valve, and the temperature increase of the hot water upstream from the distribution valve can be suppressed. In addition, when hot water supply is started in this state, hot water whose temperature rise is suppressed is supplied through the second bypass passage, so that high temperature hot water can be avoided.
  • the flow rate adjusting means is a flow rate adjusting valve provided on the downstream side of the branch portion and on the upstream side of the hot water heat exchanger, the bypass flow rate adjusting valve is provided in the second bypass passage, and heating operation is being performed. May be configured to open the bypass flow rate adjusting valve.
  • the flow rate adjustment valve closes the hot water supply passage and the second bypass passage is open. Therefore, even if the temperature of the hot water in the hot water supply passage is increased by the heating heat medium during the heating operation, the heat transfer is suppressed by the flow rate adjusting valve, and the temperature increase of the hot water upstream of the flow rate adjusting valve can be suppressed. . In addition, when hot water supply is started in this state, hot water whose temperature rise is suppressed is supplied through the second bypass passage, so that high temperature hot water can be avoided.
  • the present invention it is possible to provide a heating and hot water supply apparatus that can avoid high-temperature hot water supply during hot water supply during heating operation without using an expensive distribution valve or a three-way valve with a closing function.
  • FIG. 1 It is the schematic of the heating hot-water supply apparatus of this invention. It is a graph which shows the hot-water supply temperature at the time of closing a hot-water supply channel
  • FIG. 1 shows the schematic of the heating hot-water supply apparatus of Example 2.
  • 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 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 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 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, and branches from the hot water supply passage 21 to supply hot water.
  • a second bypass passage 22 is provided to bypass the heat exchanger 20 for use.
  • 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 On the upstream side of the second distribution valve 23, a flow rate adjustment valve 24, a hot water supply amount sensor 25, and an incoming water temperature sensor 26 are provided.
  • the 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 corresponds to a flow rate detection means and can detect the 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.
  • 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 as to circulate the heating heat medium only in the circulation passage 4, operates the circulation pump 11, and circulates the heating heat medium in the circulation passage 4.
  • 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 control unit 7 adjusts the second distribution valve 23 so that the hot water supply passage 21 is closed and the second bypass passage 22 is opened. As the heating operation continues, the heating heat medium circulates at a predetermined temperature.
  • FIG. 2 is a graph showing an example of changes over time in the temperature detected by the hot water temperature sensor 27 and the hot water temperature sensor 28 before and after the start of the hot water supply operation during the heating operation, and the opening degree of the second distribution valve 23.
  • the opening degree of the second distribution valve 23 is represented by the number of steps on the second vertical axis.
  • the fully closed state in which the hot water supply passage 21 is closed is 1700 steps, and is distributed 2: 3 to the hot water supply passage 21 and the second bypass passage 22.
  • the state to perform is 1000 steps.
  • the temperature of the clean water at this time is 22 degreeC.
  • the hot water in the hot water supply passage is heated by the hot water supply heat exchanger 20 by this heating heat medium, and the temperature of the hot water in the hot water supply passage 21 detected by the hot water temperature sensor 27 close to the hot water supply heat exchanger 20 is about 64 ° C.
  • the temperature of the hot water detected by the hot water supply temperature sensor 28 is about 33 ° C.
  • the hot water supply passage 21 is closed by the second distribution valve 23, and heat transfer from the hot water heated by the hot water heat exchanger 20 is suppressed in the hot water upstream of the second distribution valve 23.
  • the upstream side of the distribution valve 23 is at a low temperature.
  • hot water supply is started at an elapsed time of about 3 seconds, but when the hot water supply amount sensor 25 detects a flow rate of a predetermined flow rate or more by opening a hot water tap or the like, the hot water supply operation is started.
  • the controller 7 adjusts the first distribution valve 15 so that the heating heat medium is circulated only through the first bypass passage 12, and the hot water in the hot water supply heat exchanger 20 is heated by the heating heat medium. Since the hot water supply passage 21 is closed for 1 second, for example, after the hot water supply operation is started, the hot water whose temperature rise on the upstream side of the second distribution valve 23 is suppressed is supplied through the second bypass passage 22.
  • the hot water whose temperature on the upstream side of the hot water temperature sensor 28 has risen is supplied and the hot water temperature rises by about + 4 ° C., but the rise is small and the hot water immediately passing through the second bypass passage 22 is hot water supplied. High temperature hot water can be avoided.
  • the controller 7 gradually adjusts the opening of the second distribution valve 23 from 1700 steps to 1000 steps, for example, in 3 seconds, so that clean water gradually flows into the hot water supply passage 21 after, for example, 1 second has elapsed since the start of hot water supply. To do. Since the hot water in the hot water supply heat exchanger 20 is gradually discharged, the temperature of the discharged water rises. However, since the high-temperature hot water discharged from the hot water and the low-temperature clean water are mixed, the rise of the hot-water supply temperature can be kept small.
  • the hot water in the hot water supply passage 21 whose temperature has increased during the heating operation is mixed with the hot water passing through the second bypass passage and gradually supplied with hot water, so that the hot water in the hot water supply passage 21 whose temperature has increased during the heating operation is used. High temperature hot water can be avoided. Further, when the control unit 7 determines that the simultaneous heating and hot water supply operation is possible based on the hot water supply set temperature, the hot water temperature detected by the hot water temperature sensor 27, etc., the control unit 7 adjusts the distribution ratio of the first distribution valve 15 to perform heating. Perform hot water supply simultaneous operation.
  • FIG. 3 shows the change over time in the tapping temperature and the hot water temperature when the second distribution valve 23 is fixed at 1000 steps and the hot water supply passage 21 is not closed during the heating operation in order to reproduce the conventional heating and hot water supply apparatus. It is a graph which shows an example. In addition, the temperature of the clean water at this time is 24 degreeC.
  • the hot water supply passage 21 Since the hot water supply passage 21 is not closed during the heating operation, convection occurs when the temperature of the hot water is increased by the heating heat medium in the hot water supply heat exchanger 20, and hot hot water flows through the hot water supply passage 21 and the second bypass passage 22. . Therefore, heat is transferred to the upstream side and the downstream side of the hot water supply heat exchanger 20 so that the hot water in the hot water supply passage 21 and the second bypass passage becomes hot.
  • the hot water at the downstream side of the joining portion of the hot water supply passage 21 with the second bypass passage also rises in temperature, and the temperature detected by the hot water supply temperature sensor 28 is about 49 ° C., which is higher than in the case of FIG. Yes.
  • the upstream side of the second distribution valve 23 is also similarly heated so that the hot water is at a high temperature.
  • the temperature of hot water in the hot water supply passage 21 is suppressed by closing the hot water supply passage 21 by the second distribution valve 23 during the heating operation in the heating hot water supply apparatus 1 of the present invention. Can avoid hot hot water. Moreover, since hot water in the hot water supply passage 21 whose temperature has increased during the heating operation is gradually mixed with hot water passing through the second bypass passage 22, hot water can be avoided.
  • FIG. 1 A of heating hot-water supply apparatuses of Example 2 are demonstrated based on FIG. 1 A of heating hot-water supply apparatuses are the bypass provided in the flow regulating valve 23A and the 2nd bypass passage 22A which were provided in the hot water supply passage 21A instead of the 2nd distribution valve 23 which is the flow volume adjustment means of the hot water supply passage 21 of Example 1.
  • the hot water supply flow rate can be adjusted by the flow rate adjustment valve 24A.
  • the second bypass passage 22A is branched from between the flow regulating valve 23A and the hot water supply amount sensor 25A.
  • the controller 7A closes the flow rate adjustment valve 23A and opens the bypass flow rate adjustment valve 24A so as to close the hot water supply passage 21A and open the second bypass passage 22A. Even if the temperature of the hot water in the hot water supply passage 21A rises during the heating operation by the heating heat medium, since the flow rate adjustment valve 23A is closed, the temperature rise of the upstream water upstream from the flow rate adjustment valve 23A is suppressed.
  • the hot water whose temperature rise is suppressed is supplied through the second bypass passage 22A, so that high temperature hot water at the start of hot water supply can be avoided. Further, the control unit 7A adjusts the flow rate adjustment valve 23A so that a large amount of clean water flows through the hot water supply passage 21 gradually. Thus, the hot water in the hot water supply passage 21A that has risen in temperature during the heating operation is mixed with tap water and supplied hot water little by little, so that hot hot water due to hot water in the hot water supply passage 21A can be avoided.
  • controller 7A determines that the simultaneous heating and hot water supply operation is possible based on the hot water supply set temperature, the hot water temperature detected by hot water temperature sensor 27A, etc., the controller 7A adjusts the distribution ratio of first distribution valve 15A to control the hot water supply. Perform simultaneous operation.
  • 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) 24 Flow control valve 25 Hot water supply amount sensor 27 Hot water temperature sensor 28 Hot water temperature sensor

Abstract

[Problem] To provide a heating and hot water supplying device that can prevent high temperature hot water even when supplying hot water during heating operations without using a distributing valve or a three-way valve with a closing function. [Solution] A heating and hot water supplying device comprises a combustion means, a heat exchanger, a circulation channel, a circulation pump, a first bypass channel that branches from the circulation channel and bypasses a heating terminal, a heat exchanger for hot water supply that is provided in the first bypass channel, and a hot water supply channel for supplying tap water to the heat exchanger for hot water supply. A distributing means is provided in a branching portion of the first bypass channel and the distributing means can adjust the distribution ratio so as to enable each of a heating operation, a hot water supply operation, and a simultaneous heating and hot water supply operation. The hot water supply channel is provided with a second bypass channel that bypasses the heat exchanger for hot water supply, comprises a flow rate detection means that is upstream from a branching portion of the second bypass channel, and comprises a flow rate regulating means for the hot water supply channel that is in the branching portion or downstream from the branching portion and upstream of the heat exchanger for hot water supply. The hot water supply channel is closed by the flow rate regulating means during heating operation.

Description

暖房給湯装置Heating and hot water supply equipment
　本発明は、燃焼熱により暖房熱媒を加熱して暖房を行い、この暖房熱媒との熱交換により上水を加熱して給湯を行う暖房給湯装置に関し、特に暖房運転と給湯運転を同時に実行可能な暖房給湯装置に関する。 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.
　従来から暖房運転と給湯運転を同時に実行可能な暖房給湯装置が広く利用されている。このような暖房給湯装置は、例えば特許文献１に示すように、熱交換器と暖房端末を備え、熱交換器と暖房端末との間で暖房熱媒を循環ポンプにより循環させる循環通路と、この循環通路から分岐されて暖房端末をバイパスするバイパス通路を備えている。 Conventionally, a heating and hot water supply apparatus that can simultaneously execute a heating operation and a hot water supply operation has been widely used. Such a heating hot water supply apparatus includes, for example, a heat exchanger and a heating terminal as shown in Patent Document 1, and a circulation passage for circulating a heating heat medium between the heat exchanger and the heating terminal by a circulation pump, A bypass passage that branches off from the circulation passage and bypasses the heating terminal is provided.
　このバイパス通路には給湯用熱交換器が設けられ、給湯用熱交換器を通る給湯通路を流れる湯水を暖房熱媒により加熱可能に構成されている。循環通路とバイパス通路との分岐部には分配流量調整手段が設けられ、暖房端末へ向かう暖房熱媒と給湯用熱交換器へ向かう暖房熱媒の分配比を調節可能である。 The bypass passage is provided with a heat exchanger for hot water supply, and the hot water flowing through the hot water passage passing through the heat exchanger for hot water supply can be heated by a heating heat medium. A distribution flow rate adjusting means is provided at a branch portion between the circulation passage and the bypass passage, and the distribution ratio of the heating heat medium toward the heating terminal and the heating heat medium toward the hot water supply heat exchanger can be adjusted.
　暖房運転のときは、燃料を燃焼させて熱交換器にて暖房熱媒を加熱し、この暖房熱媒を全て循環通路内に循環させるように分配流量調整手段を調節する。加熱された暖房熱媒は暖房端末で放熱して熱交換器に戻る。 During the heating operation, the distribution flow rate adjusting means is adjusted so that the heating heat medium is heated by the heat exchanger and the heating heat medium is circulated in the circulation passage. The heated heating heat medium radiates heat at the heating terminal and returns to the heat exchanger.
　給湯運転のときは、加熱された暖房熱媒の一部または全部をバイパス通路に循環させるように分配流量調整手段を調節し、このバイパス通路に設けられた給湯用熱交換器で給湯通路を流れる湯水を加熱して給湯する。また、分配弁の代わりに設けられた三方弁により暖房熱媒を全てバイパス通路に循環させるように切り換えて給湯運転するものもある。 During hot water supply operation, the distribution flow rate adjusting means is adjusted so that part or all of the heated heating medium is circulated in the bypass passage, and the hot water supply heat exchanger provided in the bypass passage flows through the hot water passage. Heat the hot water to supply hot water. In addition, there is a type in which a hot water supply operation is performed by switching so that the heating heat medium is circulated through the bypass passage by a three-way valve provided instead of the distribution valve.
　給湯通路には、給湯用熱交換器をバイパスする給湯バイパス通路が設けられ、給湯用熱交換器で加熱された湯水と給湯バイパス通路を流れる上水を混合して給湯温度を調節する。例えば特許文献１のように、給湯バイパス通路にバイパス弁を設けて給湯バイパス通路を流れる上水の流量を調節し、この上水と加熱された湯水を混合して給湯温度を調節する。または、給湯通路と給湯バイパス通路の合流部に混合弁を設けて、加熱された湯水と上水の混合比を調節し、加熱された湯水と上水を混合して給湯温度を調節する。 The hot water supply passage is provided with a hot water supply bypass passage that bypasses the hot water heat exchanger, and hot water heated by the hot water heat exchanger and hot water flowing through the hot water bypass passage are mixed to adjust the hot water supply temperature. For example, as in Patent Literature 1, a hot water supply bypass passage is provided with a bypass valve to adjust the flow rate of hot water flowing through the hot water supply bypass passage, and the hot water and heated hot water are mixed to adjust the hot water supply temperature. Alternatively, a mixing valve is provided at the junction of the hot water supply passage and the hot water supply bypass passage to adjust the mixing ratio of heated hot water and clean water, and the heated hot water and clean water are mixed to adjust the hot water supply temperature.
特開２００５－３３７６３２号公報JP 2005-337632 A
　このような暖房給湯装置が暖房運転を行っているとき、高温の暖房熱媒は暖房端末と熱交換器の間で循環する。しかし、循環通路とバイパス通路との分岐部に設けられた分配弁または三方弁は、一般的に高価な閉止機能付きの分配弁または三方弁ではなく、暖房運転中にバイパス通路への暖房熱媒の流出を完全に止めることができない。そのため、暖房運転によりバイパス通路へ流出した高温の暖房熱媒によって給湯用熱交換器内の湯水が加熱される。 When such a heating / hot water supply apparatus is performing a heating operation, a high-temperature heating heat medium circulates between the heating terminal and the heat exchanger. However, a distribution valve or a three-way valve provided at a branch portion between the circulation passage and the bypass passage is not an expensive distribution valve or a three-way valve having a closing function in general, but a heating heat medium to the bypass passage during heating operation. The outflow cannot be stopped completely. Therefore, the hot water in the hot water supply heat exchanger is heated by the high-temperature heating heat medium that has flowed into the bypass passage by the heating operation.
　また、給湯用熱交換器外であっても、湯水の伝熱により給湯通路内の湯水の温度が上昇する。例えば特許文献１の暖房給湯装置では、伝熱により給湯用熱交換器の上流側及び下流側の給湯通路や給湯バイパス通路の湯水の温度が上昇する。この状態で給湯が開始されると、給湯開始後は給湯通路及び給湯バイパス通路の湯水の温度が高いので、使用者が予期しない高温出湯の虞があり危険である。 Also, even outside the hot water heat exchanger, the temperature of the hot water in the hot water passage rises due to the transfer of hot water. For example, in the heating and hot water supply apparatus disclosed in Patent Document 1, the temperature of hot water in the hot water supply passage and the hot water supply bypass passage on the upstream side and the downstream side of the heat exchanger for hot water supply rises due to heat transfer. If hot water supply is started in this state, the hot water temperature in the hot water supply passage and the hot water supply bypass passage is high after the start of hot water supply.
　また、このような高温出湯を防ぐために、循環通路とバイパス通路の分岐部に設けられた分配弁または三方弁を閉止機能付きの分配弁または三方弁にして暖房熱媒が流出しないようにすることは、製作コストが上昇してしまうため好ましくない。 In addition, in order to prevent such high temperature hot water discharge, the distribution valve or three-way valve provided at the branch portion of the circulation passage and bypass passage should be a distribution valve or three-way valve with a closing function so that the heating heat medium does not flow out. Is not preferable because the manufacturing cost increases.
　本発明の目的は、閉止機能付きの分配弁または三方弁を使用せずに、暖房運転中に給湯しても高温出湯を回避可能な暖房給湯装置を提供することである。 An object of the present invention is to provide a heating and hot water supply apparatus that can avoid high-temperature hot water discharge even when hot water is supplied during heating operation without using a distribution valve or a three-way valve with a closing function.
　本発明による暖房給湯装置は、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バイパス通路の分岐部より上流側に流量検知手段を備え、前記分岐部または前記分岐部より下流側且つ前記給湯用熱交換器の上流側に前記給湯通路の流量調整手段を備え、暖房運転中には前記流量調整手段により前記給湯通路を閉止していることを特徴としている。 The heating and hot water supply apparatus according to the present invention 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. In the heating and hot water supply apparatus having a hot water supply passage for supplying hot and cold water, a distribution means is provided at the branch portion of the first bypass passage, and the distribution means is provided for each of the heating operation, the hot water supply operation, and the heating and hot water simultaneous operation. The distribution ratio can be adjusted to enable operation, and the hot water supply passage is provided with a second bypass passage that bypasses the hot water heat exchanger, and the flow rate is set upstream from the branch portion of the second bypass passage. Detection Provided with a flow rate adjusting means for the hot water supply passage on the downstream side of the branching section or on the upstream side of the hot water heat exchanger, and the hot water supply passage is closed by the flow rate adjusting means during heating operation. It is characterized by that.
　上記構成によれば、暖房運転中には流量調整手段により給湯通路が閉止されているので流量調整手段によって湯水の伝熱が抑えられる。従って、暖房運転中に分配手段から流出した暖房熱媒によって給湯用熱交換器を介して給湯通路内の湯水の温度が上昇しても、流量調整手段より上流側の湯水の温度上昇を抑制することができる。この状態で給湯が開始されると、温度上昇が抑えられた湯水が第２バイパス通路を通って給湯されるので、高温出湯を回避することができる。 According to the above configuration, since the hot water supply passage is closed by the flow rate adjusting means during the heating operation, the heat transfer of the hot water is suppressed by the flow rate adjusting means. Therefore, even if the temperature of the hot water in the hot water supply passage rises via the hot water supply heat exchanger due to the heating heat medium flowing out from the distribution means during the heating operation, the temperature rise of the hot water upstream from the flow rate adjusting means is suppressed. be able to. When hot water supply is started in this state, hot water whose temperature rise is suppressed is supplied through the second bypass passage, so that high temperature hot water can be avoided.
　前記流量調整手段は、前記分岐部に設けられた分配弁であってもよい。 The flow rate adjusting means may be a distribution valve provided in the branch portion.
　上記構成によれば、暖房運転中には、分配弁により給湯通路が閉止されていると共に第２バイパス通路が開通している。従って、暖房運転中に暖房熱媒によって給湯通路内の湯水の温度が上昇しても分配弁により伝熱が抑えられ、分配弁より上流側の湯水の温度上昇を抑制することができる。また、この状態で給湯が開始されると、温度上昇が抑えられた湯水が第２バイパス通路を通って給湯されるので、高温出湯を回避することができる。 According to the above configuration, during the heating operation, the hot water supply passage is closed by the distribution valve and the second bypass passage is opened. Therefore, even if the temperature of the hot water in the hot water supply passage is increased by the heating heat medium during the heating operation, heat transfer is suppressed by the distribution valve, and the temperature increase of the hot water upstream from the distribution valve can be suppressed. In addition, when hot water supply is started in this state, hot water whose temperature rise is suppressed is supplied through the second bypass passage, so that high temperature hot water can be avoided.
　前記流量調整手段は、前記分岐部より下流側且つ前記給湯用熱交換器の上流側に設けられた流量調整弁であり、前記第２バイパス通路にはバイパス流量調整弁が設けられ、暖房運転中は前記バイパス流量調整弁を開放しているように構成してもよい。 The flow rate adjusting means is a flow rate adjusting valve provided on the downstream side of the branch portion and on the upstream side of the hot water heat exchanger, the bypass flow rate adjusting valve is provided in the second bypass passage, and heating operation is being performed. May be configured to open the bypass flow rate adjusting valve.
　上記構成によれば、暖房運転中には流量調整弁が給湯通路を閉止し、第２バイパス通路が開通している。従って、暖房運転中に暖房熱媒によって給湯通路内の湯水の温度が上昇しても、流量調整弁により伝熱が抑えられ、流量調整弁より上流側の湯水の温度上昇を抑制することができる。また、この状態で給湯が開始されると、温度上昇が抑えられた湯水が第２バイパス通路を通って給湯されるので、高温出湯を回避することができる。 According to the above configuration, during the heating operation, the flow rate adjustment valve closes the hot water supply passage and the second bypass passage is open. Therefore, even if the temperature of the hot water in the hot water supply passage is increased by the heating heat medium during the heating operation, the heat transfer is suppressed by the flow rate adjusting valve, and the temperature increase of the hot water upstream of the flow rate adjusting valve can be suppressed. . In addition, when hot water supply is started in this state, hot water whose temperature rise is suppressed is supplied through the second bypass passage, so that high temperature hot water can be avoided.
　本発明によれば、高価な閉止機能付きの分配弁または三方弁を使用せずに、暖房運転中の給湯時の高温出湯を回避可能な暖房給湯装置を提供することができる。 According to the present invention, it is possible to provide a heating and hot water supply apparatus that can avoid high-temperature hot water supply during hot water supply during heating operation without using an expensive distribution valve or a three-way valve with a closing function.
本発明の暖房給湯装置の概略図である。It is the schematic of the heating hot-water supply apparatus of this invention. 暖房運転中に給湯通路を閉止した場合の給湯温度を示すグラフである。It is a graph which shows the hot-water supply temperature at the time of closing a hot-water supply channel | path during heating operation. 暖房運転中に給湯通路を閉止しない場合の給湯温度を示すグラフである。It is a graph which shows the hot_water | molten_metal supply temperature when not closing a hot-water supply path | route during heating operation. 実施例２の暖房給湯装置の概略図である。It is the schematic of the heating hot-water supply apparatus of Example 2. FIG.
　以下、本発明を実施するための形態について実施例に基づいて説明する。 Hereinafter, modes for carrying out the present invention will be described based on examples.
　最初に、本発明の暖房給湯装置１の全体構成について、図１に基づいて説明する。
　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。 Initially, the whole structure of the heating hot-water supply apparatus 1 of this invention is demonstrated based on FIG.
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.
　暖房給湯装置１は、燃料ガスと空気を混合して燃焼させる燃焼手段である燃焼部２と、燃焼により発生した燃焼ガスとの熱交換により暖房熱媒を加熱する熱交換器１０と、熱交換器１０と暖房端末を接続する循環通路４と、循環通路４に暖房熱媒を循環させる循環ポンプ１１等を備えている。 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. A circulation passage 4 for connecting the heater 10 and the heating terminal, and a circulation pump 11 for circulating the heating heat medium in the circulation passage 4.
　また、暖房給湯装置１は、循環通路４から分岐されて暖房端末をバイパスする第１バイパス通路１２と、この第１バイパス通路１２に設けられた給湯用熱交換器２０と、この給湯用熱交換器２０に上水を供給すると共に、給湯用熱交換器２０で加熱された湯水を給湯するための給湯通路２１等を備えている。循環通路４と第１バイパス通路１２の分岐部には分配手段である第１分配弁１５が設けられている。 Further, 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.
　さらに、暖房給湯装置１は、温度センサ等の検知信号を受信すると共に、上記機器を作動させて暖房運転や給湯運転等を制御する制御部７を備え、上記の機器等が収容された箱状のケース８を備えている。 Furthermore, 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.
　次に、燃焼部２について説明する。
　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。 Next, the combustion unit 2 will be described.
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.
　燃焼ファン４２の回転数により燃焼用の空気の流量が制御される。また、燃料ガス通路４１の下流端にはベンチュリミキサ４４が設けられ、燃焼ファン４２の回転数によって供給される燃料ガスの流量が制御される。燃料ガス通路４１には電磁弁４５が設けられ、電磁弁４５の開閉により燃料ガスの供給、停止を行う。 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.
　バーナ４３は、燃焼ファン４２によって送り込まれた混合ガスに、バーナ４３の下方に設けられた点火装置４６により点火して燃焼を開始する。また、バーナ４３の下方には燃焼状態を検知する燃焼センサ４７を備えている。 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.
　点火装置４６と燃焼センサ４７の下方には熱交換器１０が配設されている。この熱交換器１０やバーナ４３等は、燃焼ガスの通路を形成する缶体４８に収容されている。バーナ４３において混合ガスの燃焼により発生した燃焼ガスは、熱交換器１０に送られ、暖房熱媒と熱交換をした後で、缶体４８の下部から延びる排気通路４９を通って外部に排気される。排気通路４９の下流端部には、排気される燃焼ガスの温度を検知可能な排気温度センサ５０が設けられている。 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.
　熱交換器１０は、燃焼ガスの顕熱を回収する１次熱交換器１０ａと、燃焼ガスの潜熱を回収する２次熱交換器１０ｂを備えている。この２つの熱交換器は、２次熱交換器１０ｂで加熱された暖房熱媒が１次熱交換器１０ａでさらに加熱されるように接続されている。缶体４８の底部には２次熱交換器１０ｂで発生したドレン水を外部へ排出する排水通路５１が設けられている。排水通路５１の下流端部分には、燃焼ガスの流出を防ぐための排水トラップ５２が設けられている。 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.
　次に、循環通路４について説明する。
　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。 Next, the circulation passage 4 will be described.
Between the circulation pump 11 provided in the circulation passage 4 and the heat exchanger 10, 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.
　熱交換器１０の下流側で循環通路４から分岐された第１バイパス通路１２の分岐部には第１分配弁１５が設けられている。第１分配弁１５は、熱交換器１０で加熱された暖房熱媒を循環通路４と第１バイパス通路１２に分配比を調節して分配可能である。第１バイパス通路１２は、循環ポンプ１１の上流側で循環通路４に合流する。 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.
　熱交換器１０と第１分配弁１５の間には、循環通路４内の圧力を開放する圧力開放弁１６が設けられている。循環ポンプ１１の上流側には、暖房端末から戻ってくる暖房熱媒の温度を検知可能な暖房戻り温度センサ１７が設けられている。また、循環ポンプ１１と暖房戻り温度センサ１７の間に、暖房熱媒を補充するための補充通路１８が接続されている。 Between the heat exchanger 10 and the first distribution valve 15, a pressure release valve 16 for releasing the pressure in the circulation passage 4 is provided. 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.
　次に、給湯用熱交換器２０について説明する。
　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。 Next, the heat exchanger 20 for hot water supply will be described.
The hot water supply heat exchanger 20 provided in the first bypass passage 12 is a plate heat exchanger. In the plate heat exchanger, a plurality of heat exchange plates are stacked to form a passage between the heat exchange plates. In the hot water supply heat exchanger 20, 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.
　次に、給湯通路２１について説明する。
　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。 Next, the hot water supply passage 21 will be described.
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, and branches from the hot water supply passage 21 to supply hot water. A second bypass passage 22 is provided to bypass the heat exchanger 20 for use. 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.
　第２分配弁２３の上流側には、流量調整弁２４と給湯水量センサ２５と入水温度センサ２６が設けられている。流量調整弁２４は、第２分配弁２３に入水する上水の流量を調整可能である。給湯水量センサ２５は、流量検知手段に相当し、上水の流量を検知可能である。入水温度センサ２６は第２分配弁２３に入水する上水の温度を検知可能である。 On the upstream side of the second distribution valve 23, a flow rate adjustment valve 24, a hot water supply amount sensor 25, and an incoming water temperature sensor 26 are provided. The 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 corresponds to a flow rate detection means and can detect the 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.
　給湯通路２１と第２バイパス通路２２の合流部と、給湯用熱交換器２０との間には、出湯温度センサ２７が設けられている。出湯温度センサ２７は、給湯用熱交換器２０から出湯される湯水の温度を検知可能である。給湯通路２１と第２バイパス通路２２と合流部の下流側には、給湯温度センサ２８が設けられている。給湯温度センサ２８は、給湯用熱交換器２０で加熱された湯水と第２バイパス通路２２を流れる上水とが混合された湯水の温度を検知可能である。 Between the hot water supply passage 21 and the second bypass passage 22 and the hot water supply heat exchanger 20, a hot water temperature sensor 27 is provided. 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.
　次に、制御部７について説明する。
　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。 Next, the control unit 7 will be described.
Although not shown, the 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.
　次に、暖房給湯装置１の作用、効果について図１～図３に基づいて説明する。
　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通路４に循環させると共に、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。制御部７は、暖房運転中は給湯通路２１を閉止すると共に第２バイパス通路２２が開通するように第２分配弁２３を調節する。暖房運転の継続により暖房熱媒は所定温度で循環するようになる。 Next, the operation and effect of the heating and hot water supply apparatus 1 will be described with reference to FIGS.
When the heating operation is started, the control unit 7 adjusts the first distribution valve 15 so as to circulate the heating heat medium only in the circulation passage 4, operates the circulation pump 11, and circulates the heating heat medium in the circulation passage 4. At the same time, 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. During the heating operation, the control unit 7 adjusts the second distribution valve 23 so that the hot water supply passage 21 is closed and the second bypass passage 22 is opened. As the heating operation continues, the heating heat medium circulates at a predetermined temperature.
　図２は、暖房運転中の給湯運転開始前後の出湯温度センサ２７及び給湯温度センサ２８で検出された温度と、第２分配弁２３の開度の経時変化の１例を示すグラフである。第２分配弁２３の開度は第２縦軸のステップ数で表し、例えば給湯通路２１を閉止する全閉状態が1700ステップであり、給湯通路２１と第２バイパス通路２２に２：３に分配する状態が1000ステップである。尚、このときの上水の温度は２２℃である。 FIG. 2 is a graph showing an example of changes over time in the temperature detected by the hot water temperature sensor 27 and the hot water temperature sensor 28 before and after the start of the hot water supply operation during the heating operation, and the opening degree of the second distribution valve 23. The opening degree of the second distribution valve 23 is represented by the number of steps on the second vertical axis. For example, the fully closed state in which the hot water supply passage 21 is closed is 1700 steps, and is distributed 2: 3 to the hot water supply passage 21 and the second bypass passage 22. The state to perform is 1000 steps. In addition, the temperature of the clean water at this time is 22 degreeC.
　暖房運転中には、循環する暖房熱媒の一部が第１分配弁１５から流出して第１バイパス通路１２へ流入する。この暖房熱媒により給湯用熱交換器２０で給湯通路内の湯水が加熱されて、給湯用熱交換器２０に近い出湯温度センサ２７で検知される給湯通路２１内の湯水の温度が６４℃程度に上昇し、給湯温度センサ２８で検知される湯水の温度が３３℃程度になっている。図示しないが、第２分配弁２３により給湯通路２１が閉止され、第２分配弁２３より上流側の湯水には給湯用熱交換器２０で加熱された湯水の伝熱が抑えられるので、第２分配弁２３より上流側は低温である。 During the heating operation, a part of the circulating heating heat medium flows out from the first distribution valve 15 and flows into the first bypass passage 12. The hot water in the hot water supply passage is heated by the hot water supply heat exchanger 20 by this heating heat medium, and the temperature of the hot water in the hot water supply passage 21 detected by the hot water temperature sensor 27 close to the hot water supply heat exchanger 20 is about 64 ° C. The temperature of the hot water detected by the hot water supply temperature sensor 28 is about 33 ° C. Although not shown, the hot water supply passage 21 is closed by the second distribution valve 23, and heat transfer from the hot water heated by the hot water heat exchanger 20 is suppressed in the hot water upstream of the second distribution valve 23. The upstream side of the distribution valve 23 is at a low temperature.
　図２では経過時間３秒付近で給湯が開始されているが、給湯栓等の開栓により給湯水量センサ２５が所定の流量以上の流量を検知すると、給湯運転が開始される。制御部７は、暖房熱媒を第１バイパス通路１２にのみ循環させるように第１分配弁１５を調節し、暖房熱媒により給湯用熱交換器２０内の湯水が加熱される。給湯運転開始後も例えば１秒間給湯通路２１が閉止されているので、第２分配弁２３より上流側の温度上昇が抑えられた上水が第２バイパス通路２２を通って給湯される。従って、給湯温度センサ２８上流側の温度が上昇した湯水が給湯されて給湯温度が＋４℃ほど上昇するが、その上昇幅は小さく、すぐに第２バイパス通路２２を通る上水が給湯されるので、高温出湯を回避することができる。 In FIG. 2, hot water supply is started at an elapsed time of about 3 seconds, but when the hot water supply amount sensor 25 detects a flow rate of a predetermined flow rate or more by opening a hot water tap or the like, the hot water supply operation is started. The controller 7 adjusts the first distribution valve 15 so that the heating heat medium is circulated only through the first bypass passage 12, and the hot water in the hot water supply heat exchanger 20 is heated by the heating heat medium. Since the hot water supply passage 21 is closed for 1 second, for example, after the hot water supply operation is started, the hot water whose temperature rise on the upstream side of the second distribution valve 23 is suppressed is supplied through the second bypass passage 22. Accordingly, the hot water whose temperature on the upstream side of the hot water temperature sensor 28 has risen is supplied and the hot water temperature rises by about + 4 ° C., but the rise is small and the hot water immediately passing through the second bypass passage 22 is hot water supplied. High temperature hot water can be avoided.
　次に、給湯開始から例えば１秒経過した後次第に給湯通路２１に上水が流れるように、制御部７は第２分配弁２３の開度を1700ステップから1000ステップへ徐々に例えば３秒で調節する。給湯用熱交換器２０内の高温の湯水が徐々に出湯されるので、出湯温度が上昇する。しかし、この出湯された高温の湯水と低温の上水が混合されるため、給湯温度の上昇幅は小さく抑えられる。 Next, the controller 7 gradually adjusts the opening of the second distribution valve 23 from 1700 steps to 1000 steps, for example, in 3 seconds, so that clean water gradually flows into the hot water supply passage 21 after, for example, 1 second has elapsed since the start of hot water supply. To do. Since the hot water in the hot water supply heat exchanger 20 is gradually discharged, the temperature of the discharged water rises. However, since the high-temperature hot water discharged from the hot water and the low-temperature clean water are mixed, the rise of the hot-water supply temperature can be kept small.
　こうして暖房運転中に温度が上昇した給湯通路２１内の湯水は第２バイパス通路を通る上水と混合されて少しずつ給湯されるので、暖房運転中に温度が上昇した給湯通路２１内の湯水による高温出湯を回避することができる。また、制御部７は、給湯設定温度や出湯温度センサ２７で検知される出湯温度等に基づいて暖房給湯同時運転が可能であると判断すると、第１分配弁１５の分配比を調節して暖房給湯同時運転を行う。 Thus, the hot water in the hot water supply passage 21 whose temperature has increased during the heating operation is mixed with the hot water passing through the second bypass passage and gradually supplied with hot water, so that the hot water in the hot water supply passage 21 whose temperature has increased during the heating operation is used. High temperature hot water can be avoided. Further, when the control unit 7 determines that the simultaneous heating and hot water supply operation is possible based on the hot water supply set temperature, the hot water temperature detected by the hot water temperature sensor 27, etc., the control unit 7 adjusts the distribution ratio of the first distribution valve 15 to perform heating. Perform hot water supply simultaneous operation.
　図３は、従来の暖房給湯装置を再現するために第２分配弁２３を1000ステップに固定して、暖房運転中に給湯通路２１を閉止しなかった場合の出湯温度と給湯温度の経時変化の１例を示すグラフである。尚、このときの上水の温度は２４℃である。 FIG. 3 shows the change over time in the tapping temperature and the hot water temperature when the second distribution valve 23 is fixed at 1000 steps and the hot water supply passage 21 is not closed during the heating operation in order to reproduce the conventional heating and hot water supply apparatus. It is a graph which shows an example. In addition, the temperature of the clean water at this time is 24 degreeC.
　暖房運転中に給湯通路２１を閉止していないので、給湯用熱交換器２０において暖房熱媒により湯水の温度が上昇すると対流が生じ、給湯通路２１と第２バイパス通路２２を高温の湯水が流れる。そのため、給湯用熱交換器２０の上流側及び下流側に伝熱して給湯通路２１と第２バイパス通路内の湯水が高温になる。高温の湯水により給湯通路２１の第２バイパス通路との合流部より下流側の湯水も温度が上昇し、給湯温度センサ２８に検知される温度が図２の場合より高温の４９℃程度になっている。図示しないが、第２分配弁２３の上流側も同様に伝熱して湯水が高温になっている。 Since the hot water supply passage 21 is not closed during the heating operation, convection occurs when the temperature of the hot water is increased by the heating heat medium in the hot water supply heat exchanger 20, and hot hot water flows through the hot water supply passage 21 and the second bypass passage 22. . Therefore, heat is transferred to the upstream side and the downstream side of the hot water supply heat exchanger 20 so that the hot water in the hot water supply passage 21 and the second bypass passage becomes hot. The hot water at the downstream side of the joining portion of the hot water supply passage 21 with the second bypass passage also rises in temperature, and the temperature detected by the hot water supply temperature sensor 28 is about 49 ° C., which is higher than in the case of FIG. Yes. Although not shown in the drawing, the upstream side of the second distribution valve 23 is also similarly heated so that the hot water is at a high temperature.
　図３において経過時間３秒付近で給湯が開始されると、第２分配弁２３が給湯通路２１を閉止していないので、第２分配弁２３に入水した上水が給湯通路２１と第２バイパス通路２２に分配される。従って、給湯用熱交換器２０内の高温の湯水が出湯され出湯温度が上昇する。この高温の湯水が、経過時間６秒付近で第２バイパス通路２２を通る温度が上昇した湯水と混合されて給湯されると、給湯温度が上昇する。第２バイパス通路２２を通って混合される湯水の温度が高いので、この上昇幅は＋１４℃ほどであり、図２の場合と比較して大きい。従って、図３の場合は給湯開始からしばらくの間高温の給湯が続き、その途中で大きく給湯温度が上昇するので高温出湯の危険がある。 In FIG. 3, when hot water supply is started at an elapsed time of about 3 seconds, the second distribution valve 23 has not closed the hot water supply passage 21, so that the water that has entered the second distribution valve 23 becomes hot water supply passage 21 and the second bypass. Distributed to the passage 22. Accordingly, the hot water in the hot water supply heat exchanger 20 is discharged and the temperature of the discharged water rises. When this hot hot water is mixed with hot water whose temperature has passed through the second bypass passage 22 at an elapsed time of about 6 seconds and hot water is supplied, the hot water supply temperature rises. Since the temperature of the hot and cold water mixed through the second bypass passage 22 is high, the increase width is about + 14 ° C., which is larger than the case of FIG. Therefore, in the case of FIG. 3, since hot water supply continues for a while from the start of hot water supply, and the hot water supply temperature rises in the middle of the hot water supply, there is a danger of hot hot water supply.
　以上の説明のように、本発明の暖房給湯装置１において暖房運転中に第２分配弁２３により給湯通路２１を閉止することによって、給湯通路２１内の湯水の温度が上昇することを抑制することができ、高温出湯を回避することができる。また、暖房運転中に温度が上昇した給湯通路２１内の湯水を徐々に第２バイパス通路２２を通る上水と混合して給湯するので、高温出湯を回避することができる。 As described above, the temperature of hot water in the hot water supply passage 21 is suppressed by closing the hot water supply passage 21 by the second distribution valve 23 during the heating operation in the heating hot water supply apparatus 1 of the present invention. Can avoid hot hot water. Moreover, since hot water in the hot water supply passage 21 whose temperature has increased during the heating operation is gradually mixed with hot water passing through the second bypass passage 22, hot water can be avoided.
　次に、実施例２の暖房給湯装置１Ａについて図４に基づいて説明する。
　暖房給湯装置１Ａは、実施例１の給湯通路２１の流量調整手段である第２分配弁２３の代わりに、給湯通路２１Ａに設けられた流量調整弁２３Ａと第２バイパス通路２２Ａに設けられたバイパス流量調整弁２４Ａにより給湯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、流量調整弁２３Ａと給湯水量センサ２５Ａの間から分岐されている。 Next, 1 A of heating hot-water supply apparatuses of Example 2 are demonstrated based on FIG.
1 A of heating hot-water supply apparatuses are the bypass provided in the flow regulating valve 23A and the 2nd bypass passage 22A which were provided in the hot water supply passage 21A instead of the 2nd distribution valve 23 which is the flow volume adjustment means of the hot water supply passage 21 of Example 1. The hot water supply flow rate can be adjusted by the flow rate adjustment valve 24A. The second bypass passage 22A is branched from between the flow regulating valve 23A and the hot water supply amount sensor 25A.
　次に、暖房給湯装置１Ａの作用、効果について説明する。
　制御部７Ａは、暖房運転中は給湯通路２１Ａを閉止すると共に第２バイパス通路２２Ａを開通するように、流量調整弁２３Ａを閉止し、バイパス流量調整弁２４Ａを開放する。暖房熱媒によって暖房運転中に給湯通路２１Ａ内の湯水の温度が上昇しても、流量調整弁２３Ａが閉止されているので流量調整弁２３Ａより上流側の上水の温度上昇が抑制される。 Next, the operation and effect of the heating and hot water supply apparatus 1A will be described.
During the heating operation, the controller 7A closes the flow rate adjustment valve 23A and opens the bypass flow rate adjustment valve 24A so as to close the hot water supply passage 21A and open the second bypass passage 22A. Even if the temperature of the hot water in the hot water supply passage 21A rises during the heating operation by the heating heat medium, since the flow rate adjustment valve 23A is closed, the temperature rise of the upstream water upstream from the flow rate adjustment valve 23A is suppressed.
　この状態で給湯運転が開始されると、温度上昇が抑えられた上水が第２バイパス通路２２Ａを通って給湯されるので、給湯開始時の高温出湯を回避することができる。また、制御部７Ａは、次第に給湯通路２１に上水が多く流れるように流量調整弁２３Ａを調節する。こうして暖房運転中に温度上昇した給湯通路２１Ａ内の湯水は上水と混合されて少しずつ給湯されるので、給湯通路２１Ａ内の湯水による高温出湯を回避することができる。また、制御部７Ａは、給湯設定温度や出湯温度センサ２７Ａにより検知される出湯温度等に基づいて暖房給湯同時運転が可能である判断すると、第１分配弁１５Ａの分配比を調節して暖房給湯同時運転を行う。 When the hot water supply operation is started in this state, the hot water whose temperature rise is suppressed is supplied through the second bypass passage 22A, so that high temperature hot water at the start of hot water supply can be avoided. Further, the control unit 7A adjusts the flow rate adjustment valve 23A so that a large amount of clean water flows through the hot water supply passage 21 gradually. Thus, the hot water in the hot water supply passage 21A that has risen in temperature during the heating operation is mixed with tap water and supplied hot water little by little, so that hot hot water due to hot water in the hot water supply passage 21A can be avoided. When controller 7A determines that the simultaneous heating and hot water supply operation is possible based on the hot water supply set temperature, the hot water temperature detected by hot water temperature sensor 27A, etc., the controller 7A adjusts the distribution ratio of first distribution valve 15A to control the hot water supply. Perform simultaneous operation.
　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。 In addition, those skilled in the art can implement the present embodiment in various modifications without departing from the spirit of the present invention, and the present invention includes such modifications.
１　　暖房給湯装置
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）
２４　流量調整弁
２５　給湯水量センサ
２７　出湯温度センサ
２８　給湯温度センサ 1 Heating hot water supply device 2 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)
24 Flow control valve 25 Hot water supply amount sensor 27 Hot water temperature sensor 28 Hot water temperature sensor

Claims (3)

  1. 　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湯水を所定の給湯設定温度で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バイパス通路の分岐部より上流側に流量検知手段を備え、前記分岐部または前記分岐部より下流側且つ前記給湯用熱交換器の上流側に前記給湯通路の流量調整手段を備え、暖房運転中には前記流量調整手段により前記給湯通路を閉止していることを特徴とする暖房給湯装置。     Combustion means, a heat exchanger, a circulation passage connecting the heat exchanger and the heating terminal, a circulation pump provided in the circulation passage, a first branching from the circulation passage and bypassing the heating terminal A bypass passage, a hot water supply heat exchanger provided in the first bypass passage, and supplying hot water to the hot water heat exchanger and hot water heated by the hot water heat exchanger at a predetermined hot water set temperature. In a heating and hot water supply apparatus having a hot water supply passage for hot water supply in
    Distribution means is provided at the branch portion of the first bypass passage, and the distribution means is capable of adjusting the distribution ratio so that each operation of heating operation, hot water supply operation and heating hot water supply simultaneous operation is possible.
    The hot water supply passage is provided with a second bypass passage that bypasses the hot water heat exchanger, and is provided with a flow rate detection means upstream of the branch portion of the second bypass passage, and is downstream of the branch portion or the branch portion. A heating and hot water supply apparatus comprising: a flow rate adjusting means for the hot water supply passage upstream of the hot water supply heat exchanger, wherein the hot water supply passage is closed by the flow rate adjusting means during a heating operation.
  2. 　前記流量調整手段は、前記分岐部に設けられた分配弁であることを特徴とする請求項１に記載の暖房給湯装置。 The heating / hot water supply apparatus according to claim 1, wherein the flow rate adjusting means is a distribution valve provided in the branching portion.
  3. 　前記流量調整手段は、前記分岐部より下流側且つ前記給湯用熱交換器の上流側に設けられた流量調整弁であり、前記第２バイパス通路にはバイパス流量調整弁が設けられ、暖房運転中は前記バイパス流量調整弁を開放し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。 The flow rate adjusting means is a flow rate adjusting valve provided on the downstream side of the branch portion and on the upstream side of the hot water heat exchanger, the bypass flow rate adjusting valve is provided in the second bypass passage, and heating operation is being performed. The heating hot water supply apparatus according to claim 1, wherein the bypass flow rate adjustment valve is opened.
PCT/JP2017/019341 2016-07-26 2017-05-24 Heating and hot water supplying device WO2018020805A1 (en)

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