EP3199884B1 - Heisswasserversorgungs- und -erwärmungssystem - Google Patents

Heisswasserversorgungs- und -erwärmungssystem Download PDF

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Publication number
EP3199884B1
EP3199884B1 EP14902428.3A EP14902428A EP3199884B1 EP 3199884 B1 EP3199884 B1 EP 3199884B1 EP 14902428 A EP14902428 A EP 14902428A EP 3199884 B1 EP3199884 B1 EP 3199884B1
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EP
European Patent Office
Prior art keywords
water
indoor
heating
hot
pipe
Prior art date
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EP14902428.3A
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English (en)
French (fr)
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EP3199884A1 (de
EP3199884A4 (de
Inventor
Shuhei NAITO
Yasunari Matsumura
Kyohei IIDA
Toshiyuki Sakuma
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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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
    • 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
    • F24D19/1072—Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water the system uses a heat pump
    • 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
    • F24D11/00—Central heating systems using heat accumulated in storage masses
    • F24D11/02—Central heating systems using heat accumulated in storage masses using heat pumps
    • F24D11/0214—Central heating systems using heat accumulated in storage masses using heat pumps water heating system
    • 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
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
    • F28D20/0034—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using liquid heat storage material
    • F28D20/0039—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using liquid heat storage material with stratification of the heat storage material

Definitions

  • the present invention relates to a hot-water supply and heating system.
  • a hot-water storage type heater disclosed in PTL 1 shown below includes a heating circulation circuit that connects a heating unit such as a heat pump and a hot water storage tank such that water can be circulated, a heat exchanger that heats secondary water supplied to an external indoor-heating device, and a heat exchange circulation circuit that connects the heat exchanger and the heating unit such that water can be circulated.
  • the hot-water storage type heater includes a distribution ratio adjustment unit that adjusts a distribution ratio between an amount of water circulated to the hot water storage tank and an amount of water circulated to the heat exchanger at a junction between the heating circulation circuit and the heat exchange circulation circuit.
  • a heat storage water-heating and air-conditioning machine disclosed in PTL 2 shown below has a first circulation channel which connects a first heat demand part and a first supply heat exchanger with its forward route and return route.
  • a supply channel and a discharge channel are connected to a first heat accumulation tank.
  • the first heat accumulation tank accommodates a second heat medium heated in the first supply heat exchanger and supplied via the supply channel.
  • a heat accumulation switching valve performs a changeover operation of communication of the second heat medium serving as hot heat or cold heat flowing from the first supply heat exchanger and supplied to the first heat demand part without branching to the supply channel, and communication of the second heat medium serving as hot heat or cold heat branching to the supply channel and supplied to the first heat accumulation tank.
  • a heat-accumulating hot-water-supplying air conditioner is operated at the first temperature when the second heat medium from the first supply heat exchanger is to branch to the supply channel, and at the second temperature lower than the first temperature when the second heat medium is not to branch to the supply channel.
  • a second circulation channel is provided to allow circulation independently of the first circulation channel, and connects the first heat accumulation tank and a second heat demand part which requires hot heat for hot water supply or bathtub preheating, with its forward route and return route.
  • the conventional hot-water storage type heater described above does not supply hot water to the external indoor-heating device from the heating unit directly, but supplies secondary hot water that is heated in the heat exchanger to the indoor-heating device.
  • the hot-water storage type heater requires a pump that circulates the secondary hot water of the heat exchanger to the indoor-heating device in addition to a heating circulation pump that circulates water to the heating unit.
  • the performance of a single water pump needs to satisfy a flow rate required in the indoor-heating water circuit having a high pressure loss.
  • water is circulated to the heat accumulating water circuit having a low pressure loss using a water pump that exhibits the level of performance indicated above, water is circulated at a flow rate exceeding an appropriate flow rate, the temperature of hot water coming out of the water heater is reduced, and it is therefore not possible to adequately increase the temperature of hot water flowing into the hot water storage tank.
  • the present invention has been made in order to solve the above problem, and an object thereof is to provide a hot-water supply and heating system capable of adequately increasing the temperature of hot water that flows into a hot water storage tank during a heat accumulating operation, in a configuration in which a single water pump is used for both the heat accumulating operation and an indoor-heating operation.
  • a hot-water supply and heating system of the invention includes: a hot water storage tank; a first water outlet from which water inside the hot water storage tank comes out; a first water inlet through which water enters into the hot water storage tank; a water heater configured to heat water; a water pump; a heat accumulating water path that connects the first water outlet, the water pump, the water heater, and the first water inlet in this order; a second water outlet from which water to be supplied to an external indoor-heating device comes out; a second water inlet into which water returned from the indoor-heating device enters; an indoor-heating water path that connects the second water inlet, the water pump, the water heater, and the second water outlet in this order; and a switching valve configured to switch between the heat accumulating water path and the indoor-heating water path.
  • An overlap portion in which the heat accumulating water path overlaps the indoor-heating water path is provided.
  • a narrowed portion is provided in a pipe that forms the heat accumulating water path other than the overlap portion, a flow channel cross-sectional area of the narrowed portion being smaller than a flow channel cross-sectional area of a pipe that forms the overlap portion, such that a pressure loss of the heat accumulating water path is higher than a pressure loss of the indoor-heating water path.
  • water is a concept that encompasses water of every temperature, from cold water having a low temperature to hot water having a high temperature.
  • Fig. 1 is a configuration diagram showing a hot-water supply and heating system according to Embodiment 1 of the present invention.
  • a hot-water supply and heating system 1 according to Embodiment 1 includes a water heater 100 and a tank unit 200.
  • the water heater 100 and the tank unit 200 are connected via a first common pipe 9, a second common pipe 3, and electrical wiring (not shown).
  • the hot-water supply and heating system 1 according to Embodiment 1 has a configuration in which the water heater 100 is separate from the tank unit 200, in the present invention, the water heater 100 and the tank unit 200 may be integrated with each other.
  • the water heater 100 is a heat pump type water heater.
  • the water heater 100 includes a compressor 13 that compresses a refrigerant, a water-refrigerant heat exchanger 15, a decompressor 16 that decompresses the refrigerant, a low-temperature-side heat exchanger 17 (evaporator) that causes the refrigerant to absorb heat of a low-temperature heat source (e.g., outside air), and a refrigerant pipe 14 forming a refrigerant circuit by connecting these devices annularly.
  • the water heater 100 heats water by executing operation of a heat pump cycle (refrigeration cycle) using the refrigerant circuit.
  • the water heater 100 heats water by exchanging heat between the high-temperature high-pressure refrigerant compressed by the compressor 13 and water in the water-refrigerant heat exchanger 15.
  • the water heater in the present invention is not limited to the heat pump type water heater described above, and may be the water heater of any type.
  • the water heater in the present invention may be a solar water heater that heats water with solar heat, or may also be a combustion water heater that heats water with combustion heat of fuel (e.g., gas, kerosene, heavy oil, or coal).
  • fuel e.g., gas, kerosene, heavy oil, or coal.
  • the tank unit 200 includes a hot water storage tank 2, a switching valve 6, and a water pump 11. Water is stored in the hot water storage tank 2. In the hot water storage tank 2, it is possible to form thermal stratification in which an upper side has a high temperature and a lower side has a low temperature due to a difference in the density of water caused by a difference in temperature.
  • a feed-water pipe 18 is connected to a lower portion of the hot water storage tank 2. Water supplied from a water source such as a city water supply is supplied into the hot water storage tank 2 through the feed-water pipe 18.
  • a hot-water supply pipe 19 is connected to an upper portion of the hot water storage tank 2. When hot water is supplied to the outside, hot water stored in the hot water storage tank 2 is fed into the hot-water supply pipe 19.
  • the hot water storage tank 2 has a first water outlet 25 and a first water inlet 26. Water inside the hot water storage tank 2 comes out of the first water outlet 25. Hot water heated in the water heater 100 enters into the hot water storage tank 2 from the first water inlet 26.
  • the first water outlet 25 is positioned in the lower portion of the hot water storage tank 2.
  • the first water inlet 26 is positioned in the upper portion of the hot water storage tank 2.
  • the switching valve 6 has a first port 6a, a second port 6b, and a third port 6c.
  • the switching valve 6 can switch between a state in which the third port 6c is caused to communicate with the first port 6a and the second port 6b is closed and a state in which the third port 6c is caused to communicate with the second port 6b and the first port 6a is closed.
  • a lower pipe 8 connects the first water outlet 25 of the hot water storage tank 2 and an upstream end of the first common pipe 9.
  • a downstream end of the first common pipe 9 is connected to the water inlet of the water-refrigerant heat exchanger 15 provided in the water heater 100.
  • the water pump 11 is connected to the middle of the first common pipe 9. In Embodiment 1, the water pump 11 is included in the tank unit 200, but the water pump 11 may be installed on the side of the water heater 100 in the present invention.
  • the second common pipe 3 connects the water outlet of the water-refrigerant heat exchanger 15 provided in the water heater 100 and the third port 6c of the switching valve 6.
  • An upper pipe 4 connects the first port 6a of the switching valve 6 and the first water inlet 26 of the hot water storage tank 2.
  • An indoor-heating terminal 12 is provided outside the water heater 100 and the tank unit 200.
  • the tank unit 200 and the indoor-heating terminal 12 are connected via a first external pipe 22 and a second external pipe 23.
  • the tank unit 200 has a second water outlet 27 and a second water inlet 28. Water to be supplied from the tank unit 200 to the indoor-heating terminal 12 flows to the outside of the tank unit 200 via the second water outlet 27.
  • a first internal pipe 5 connects the second port 6b of the switching valve 6 and the second water outlet 27 inside the tank unit 200.
  • the upstream end of the first external pipe 22 is connected to the second water outlet 27 from the outside of the tank unit 200.
  • the downstream end of the first external pipe 22 is connected to the inlet side of the indoor-heating terminal 12.
  • the upstream end of the second external pipe 23 is connected to the outlet side of the indoor-heating terminal 12.
  • the downstream end of the second external pipe 23 is connected to the second water inlet 28 from the outside of the tank unit 200.
  • a second internal pipe 7 connects the second water inlet 28 and the upstream end of the first common pipe 9 inside the tank unit 200. Water returning from the indoor-heating terminal 12 to the tank unit 200 enters into the tank unit 200 from the second water inlet 28.
  • the tank unit 200 includes a control section 10.
  • the control section 10 and a remote controller 21 are connected so as to be able to communicate with each other.
  • a user can input, for instance, a change in set values and a command related to the operation of the hot-water supply and heating system 1 from the remote controller 21.
  • the control section 10 has a storage section that includes ROM (read-only memory), RAM (random access memory), and non-volatile memory, a CPU (central processing unit) that executes arithmetic processing based on a program stored in the storage section, and an input/output port that inputs and outputs an external signal to and from the CPU.
  • Actuators and sensors included in the hot-water supply and heating system 1 are electrically connected to the control section 10.
  • the control section 10 controls the operation of the hot-water supply and heating system 1 based on values detected by the sensors and signals from the remote controller 21.
  • the remote controller 21 is equipped with a display section that displays information such as conditions of the hot-water supply and heating system 1, an operation section such as a switch operated by the user, a speaker, a microphone, etc.
  • a plurality of temperature sensors are mounted on the surface of the hot water storage tank 2 at intervals in a vertical direction.
  • the control section 10 detects a temperature distribution along the vertical direction in the hot water storage tank 2 by using the temperature sensors, whereby it is possible to calculate a hot water storage amount, a heat storage amount, and a remaining hot water amount in the hot water storage tank 2.
  • the control section 10 controls, for instance, the start and stop timings of a heat accumulating operation described later based on the hot water storage amount, the heat storage amount, or the remaining hot water amount in the hot water storage tank 2.
  • Fig. 2 is a view showing a circulation circuit of water during the heat accumulating operation of the hot-water supply and heating system 1 according to Embodiment 1. Arrows in Fig. 2 indicate the direction in which water flows.
  • the switching valve 6 is controlled such that the third port 6c is caused to communicate with the first port 6a and the second port 6b is closed, and the water pump 11 is driven.
  • water having a low temperature in the lower portion of the hot water storage tank 2 is fed to the water-refrigerant heat exchanger 15 of the water heater 100 through the first water outlet 25, the lower pipe 8, and the first common pipe 9.
  • water that is heated in the water-refrigerant heat exchanger 15 and has a high temperature flows into the upper portion of the hot water storage tank 2 through the second common pipe 3, the third port 6c and the first port 6a of the switching valve 6, the upper pipe 4, and the first water inlet 26.
  • water having a high temperature is gradually accumulated inside the hot water storage tank 2 downwardly from above due to the circulation of water described above, and the heat storage amount of the hot water storage tank 2 is increased.
  • the circulation circuit of water during the heat accumulating operation described above is referred to as "a heat accumulating water circuit”.
  • a path from the first water outlet 25 to the first water inlet 26 through the lower pipe 8, the first common pipe 9, the water-refrigerant heat exchanger 15, the second common pipe 3, the third port 6c and the first port 6a of the switching valve 6, and the upper pipe 4 is referred to as "a heat accumulating water path”.
  • Fig. 3 is a view showing the circulation circuit of water during the indoor-heating operation of the hot-water supply and heating system 1 according to Embodiment 1. Arrows in Fig. 3 indicate the direction in which water flows.
  • the switching valve 6 is controlled such that the third port 6c is caused to communicate with the second port 6b and the first port 6a is closed, and the water pump 11 is driven.
  • water heated in the water-refrigerant heat exchanger 15 of the water heater 100 is fed to the indoor-heating terminal 12 through the second common pipe 3, the third port 6c and the second port 6b of the switching valve 6, the first internal pipe 5, the second water outlet 27, and the first external pipe 22.
  • heat is dissipated from this water by indoor air or a floor, and the temperature of the water is thereby reduced.
  • the water having a reduced temperature then returns to the water-refrigerant heat exchanger 15 of the water heater 100 through the second external pipe 23, the second water inlet 28, the second internal pipe 7, and the first common pipe 9.
  • the water having returned to the water-refrigerant heat exchanger 15 is then reheated and recirculated.
  • an indoor-heating water circuit The circulation circuit of water during the indoor-heating operation described above is referred to as "an indoor-heating water circuit".
  • a path from the second water inlet 28 to the second water outlet 27 through the second internal pipe 7, the first common pipe 9, the water-refrigerant heat exchanger 15, the second common pipe 3, the third port 6c and the second port 6b of the switching valve 6, and the first internal pipe 5 is referred to as "an indoor-heating water path".
  • the switching valve 6 can switch between the heat accumulating water path and the indoor-heating water path.
  • the first common pipe 9, the water-refrigerant heat exchanger 15, the second common pipe 3, and the third port 6c correspond to an overlap portion in which the heat accumulating water path overlaps the indoor-heating water path.
  • the first common pipe 9 and the second common pipe 3 correspond to pipes that form the overlap portion.
  • the upper pipe 4 and the lower pipe 8 correspond to pipes that form the heat accumulating water path other than the overlap portion.
  • the first internal pipe 5 and the second internal pipe 7 correspond to pipes that form the indoor-heating water path other than the overlap portion.
  • the indoor-heating terminal 12 includes one or a plurality of indoor-heating devices 24.
  • the indoor-heating device 24 By circulating water heated in the water heater 100 to the indoor-heating device 24, the temperature of indoor air is increased.
  • the indoor-heating device 24 at least, for example, one of a floor heating panel installed under a floor, a radiator or a panel heater installed on an indoor wall, and a fan convector can be used.
  • the fan convector which includes a fan for indoor air circulation and a heat exchanger that exchanges heat between the indoor air and liquid, performs heating by forced convection.
  • each of the indoor-heating devices 24 may be of the same type or may also be different from each other.
  • the indoor-heating terminal 12 includes a plurality of the indoor-heating devices 24 depending on the type of the indoor-heating terminal 12. In addition, there are cases where a plurality of the indoor-heating terminals 12 are connected in parallel.
  • the length, number, and connection method of the internal pipes of the indoor-heating terminal 12, and the length, number, and connection method of the indoor-heating devices 24 vary from one installation site of the indoor-heating terminal 12 to another.
  • Figs. 4 to 7 are views showing examples of the configuration of the indoor-heating terminal 12. For the sake of convenience, in Figs. 4 to 7 the indoor-heating terminals 12 are distinguished from each other by adding uppercase letters of the alphabet to the reference numeral of the indoor-heating terminal 12.
  • An indoor-heating terminal 12A shown in Fig. 4 includes the single indoor-heating device 24.
  • the indoor-heating terminal 12 in each of Figs. 5 to 7 includes a plurality of the indoor-heating devices 24.
  • the indoor-heating devices 24 are distinguished from each other by adding lowercase letter of the alphabet to the reference numeral of the indoor-heating device 24.
  • An indoor-heating terminal 12B shown in Fig. 5 includes five indoor-heating devices 24a, 24b, 24c, 24d, and 24e.
  • the indoor-heating devices 24c and 24d are connected in series.
  • the indoor-heating devices 24a, 24b, and 24e are connected in parallel to the indoor-heating devices 24c and 24d.
  • An indoor-heating terminal 12C shown in Fig. 6 includes five indoor-heating devices 24a, 24b, 24c, 24d, and 24e, and the connection method thereof is the same as that of the indoor-heating terminal 12B in Fig. 5 .
  • the length of the internal pipe connected to the indoor-heating device 24e is longer than that of the indoor-heating terminal 12B in Fig. 5 .
  • the indoor-heating terminal 12D includes four indoor-heating devices 24a, 24b, 24c, and 24d.
  • the indoor-heating devices 24a and 24b connected in series are connected in parallel to the indoor-heating devices 24c and 24d connected in series.
  • the indoor-heating terminal 12E includes five indoor-heating devices 24e, 24f, 24g, 24h, and 24i.
  • the indoor-heating devices 24g and 24h are connected in series.
  • the indoor-heating devices 24e, 24f, and 24i are connected in parallel to the indoor-heating devices 24g and 24h.
  • the pressure loss of the indoor-heating water circuit may become significantly higher than the pressure loss of the heat accumulating water circuit.
  • the pressure loss corresponds to an energy loss per unit time and unit flow rate as the fluid is flowing.
  • Pressure loss, from the internal flow within a pipe or the like, is defined as a difference between the total pressure at an entrance and the total pressure at an exit.
  • the heat accumulating water circuit and the indoor-heating water circuit share the single water pump 11.
  • the indoor-heating water circuit does not need a dedicated water pump.
  • the performance (head) of the water pump 11 satisfies the flow rate required by the indoor-heating water circuit having a high pressure loss.
  • water is circulated to the heat accumulating water circuit having a low pressure loss using the water pump 11, there is a possibility that water may be circulated at a flow rate exceeding an appropriate flow rate.
  • the circulation flow rate of water during the heat accumulating operation exceeds the appropriate flow rate, the temperature of hot water coming out of the water heater 100 is reduced, and it is therefore not possible to adequately increase the temperature of hot water flowing into the hot water storage tank 2.
  • Fig. 8 is a longitudinal sectional view of the upper pipe 4 of the hot-water supply and heating system 1 according to Embodiment 1. As shown in Fig. 8 , a narrowed portion 30 is provided inside the upper pipe 4. The flow channel cross-sectional area of the narrowed portion 30 is smaller than each of the flow channel cross-sectional areas of the first common pipe 9 and the second common pipe 3.
  • the flow channel cross-sectional area of the narrowed portion 30 is also smaller than each of the flow channel cross-sectional areas of the first internal pipe 5 and the second internal pipe 7.
  • the narrowed portion 30 is a tubular member having an outer diameter substantially same as the inner diameter of the upper pipe 4. The narrowed portion 30 is fixed inside the upper pipe 4.
  • the narrowed portion 30 in the upper pipe 4 forming the heat accumulating water path other than the overlap portion between the heat accumulating water path and the indoor-heating water path it is possible to make the pressure loss of the heat accumulating water path higher than the pressure loss of the indoor-heating water path using a simple configuration.
  • water passes through the narrowed portion 30, whereby the high pressure loss occurs.
  • Water does not pass through the narrowed portion 30 during the indoor-heating operation, and hence the high pressure loss by the narrowed portion 30 does not occur.
  • the high pressure loss by the narrowed portion 30 occurs during the heat accumulating operation, whereby it is possible to reduce the circulation flow rate of the heat accumulating water circuit.
  • the narrowed portion 30 is provided in the upper pipe 4.
  • the present invention is not limited to the configuration, and the narrowed portion 30 may be provided in the lower pipe 8 forming the heat accumulating water path other than the overlap portion between the heat accumulating water path and the indoor-heating water path. This configuration also allows the above-described effect to be obtained.
  • the narrowed portion 30 is provided in the upper pipe 4, and the narrowed portion 30 is not provided in the lower pipe 8.
  • the following effect is obtained.
  • a drain valve (not shown) for performing the above drainage is connected to the first common pipe 9 or the second internal pipe 7 is conceivable. In such a configuration, when the drain valve is opened, water inside the hot water storage tank 2 is drained from the drain valve through the lower pipe 8.
  • the narrowed portion 30 In the case where the narrowed portion 30 is provided in the lower pipe 8, it takes a longer time to drain the hot water storage tank 2. In contrast to this, in Embodiment 1, the narrowed portion 30 is provided in the upper pipe 4 and the narrowed portion 30 is not provided in the lower pipe 8, and hence it does not take a long time to drain the hot water storage tank 2.
  • a water pump having a variable rotation speed may also be used as the water pump 11.
  • a water pump including, e.g., a pulse width modulation control (PWM control) DC motor capable of changing the rotation speed with a speed command voltage from the control section 10 is preferably for use as the water pump 11.
  • PWM control pulse width modulation control
  • the pressure loss of the heat accumulating water path is not more than the pressure loss of the indoor-heating water path, there are cases where, even when the rotation speed of the water pump 11 is controlled so as to run at the lowest speed, the circulation flow rate of water during the heat accumulating operation exceeds the appropriate flow rate.
  • Embodiment 1 by making the pressure loss of the heat accumulating water path higher than the pressure loss of the indoor-heating water path, it is possible to reliably control the circulation flow rate of water during the heat accumulating operation to the appropriate flow rate.
  • the value of P1/P2 is preferably not less than 2.0 and more preferably not less than 2.4.
  • the value of P1/P2 is preferably not more than 6.0 and more preferably not more than 4.3.
  • the pressure losses of the indoor-heating water circuit in cases where the indoor-heating terminals 12 having various configurations described above are used are actually measured or calculated on a provisional basis, and the pressure loss of the heat accumulating water circuit that changes according to the lengths of the first common pipe 9 and the second common pipe 3 is actually measured or calculated on a provisional basis.
  • the water pump 11 is selected, which has the maximum head that achieves a predetermined value (e.g., 10 liters per minute) for the circulation flow rate of water in the indoor-heating water circuit even for the configuration in which the pressure loss of the indoor-heating water circuit is assumed to be maximal in the actual measurement or provisional calculation.
  • the water pump 11 is selected, has the minimum head that achieves a predetermined value (e.g., one liter per minute) for the circulation flow rate of water in the heat accumulating water circuit even for the configuration in which the pressure loss of the indoor-heating water circuit is assumed to be minimal in the actual measurement or provisional calculation.
  • a problem arises in that, as a head width (a difference between the maximum head and the minimum head) of the water pump 11 is increased, the size of the water pump 11 is increased and the required installation space of the water pump 11 is increased.
  • FIG. 9 is a longitudinal sectional view of the upper pipe 4 of the hot-water supply and heating system 1 according to Embodiment 2.
  • the flow channel cross-sectional area of the upper pipe 4 shown in Fig. 9 is smaller than each of the flow path cross-section areas of the first common pipe 9 and the second common pipe 3, and is smaller than each of the flow channel cross-sectional areas of the first internal pipe 5 and the second internal pipe 7.
  • the upper pipe 4 according to Embodiment 2 is thinner than the first common pipe 9 and the second common pipe 3, and is thinner than the first internal pipe 5 and the second internal pipe 7.
  • the upper pipe 4 itself forms the narrowed portion. Accordingly, a separate member such as the narrowed portion 30 according to Embodiment 1 is not necessary, making it possible to reduce the cost.
  • the hot-water supply and heating system 1 according to Embodiment 2 achieves the same effect as that according to Embodiment 1.
  • the upper pipe 4 itself forms the narrowed portion, whereby it is possible to make the pressure loss of the heat accumulating water path higher than the pressure loss of the indoor-heating water path using the simple configuration.
  • FIG. 10 is a cross-sectional view of the switching valve 6 of the hot-water supply and heating system 1 according to Embodiment 3.
  • the switching valve 6 has a movable element 32, and a housing element that houses the movable element 32.
  • the movable element 32 is, e.g., a substantially spherical ball valve.
  • the movable element 32 has an L-shaped through channel 34. Both ends of the through channel 34 form openings in the surface of the movable element 32.
  • the movable element 32 can rotate about a rotation axis perpendicular to the sheet on which Fig. 10 is presented. In the case where the movable element 32 is configured so as to be rotated by a stepping motor (not shown), it is possible to easily control the rotation angle of the movable element 32.
  • the housing element of the switching valve 6 has the first port 6a, the second port 6b, the third port 6c, O-rings 31, and seal members 33.
  • the O-rings 31 and the seal members 33 are provided respectively in the first port 6a, the second port 6b, and the third port 6c.
  • the seal members 33 come in contact with the surface of the movable element 32 to prevent liquid leakage from gaps between the seal members 33 and the movable element 32.
  • the O-rings 31 prevent liquid leakage from gaps between the seal members 33 and the first port 6a, the second port 6b, and the third port 6c respectively.
  • Fig. 10 shows a state in which the control section 10 has switched the switching valve 6 to the heat accumulating water path. In this state, the first port 6a communicates with the third port 6c via the through channel 34. In this state, the surface of the movable element 32 comes in contact with the seal member 33 provided in the second port 6b, and the second port 6b is thereby closed.
  • the narrowed portion 30 is provided inside the first port 6a of the switching valve 6.
  • the flow channel cross-sectional area of the narrowed portion 30 is smaller than the flow channel cross-sectional area of the second port 6b.
  • the narrowed portion 30 is a tubular member having an outer diameter substantially equal to the inner diameter of the first port 6a.
  • the narrowed portion 30 is fixed inside the first port 6a. By providing the narrowed portion 30, the pressure loss of the first port 6a is made higher than the pressure loss of the second port 6b.
  • the hot-water supply and heating system 1 according to Embodiment 3 achieves the same effect as that according to Embodiment 1.
  • the narrowed portion 30 may also be formed integrally with the first port 6a.
  • Fig. 11 is a cross-sectional view of the switching valve 6 of the hot-water supply and heating system 1 according to Embodiment 4.
  • Fig. 11 shows a state in which the control section 10 has switched the switching valve 6 to the heat accumulating water path.
  • the switching valve 6 has the movable element 32, and the housing element that houses the movable element 32.
  • the movable element 32 is, e.g., a substantially spherical ball valve.
  • the movable element 32 has the L-shaped through channel 34. Both ends of the through channel 34 form openings in the surface of the movable element 32.
  • the movable element 32 can rotate about the rotation axis perpendicular to the sheet on which Fig. 11 is presented.
  • the housing element of the switching valve 6 has the first port 6a, the second port 6b, the third port 6c, the O-rings 31, and the seal members 33.
  • the O-rings 31 and the seal members 33 are provided in the first port 6a, the second port 6b, and the third port 6c respectively.
  • the seal members 33 come in contact with the surface of the movable element 32 to prevent liquid leakage from the gaps between the seal members 33 and the movable element 32.
  • the O-rings 31 prevent liquid leakage from the gaps between the seal members 33 and the first port 6a, the second port 6b, and the third port 6c.
  • part of the openings at both ends of the through channel 34 in the movable element 32 are covered with the seal members 33 of the housing element.
  • Part of the opening of one end of the through channel 34 is covered with the seal member 33 provided in the first port 6a.
  • Part of the opening of the other end of the through channel 34 is covered with the seal member 33 provided in the third port 6c.
  • Embodiment 4 when the switching valve 6 is switched to the heat accumulating water path, part of the openings at both ends of the through channel 34 in the movable element 32 are covered with the seal members 33, whereby the flow channel of water is narrowed and the high pressure loss occurs. Accordingly, it is possible to make the pressure loss of the heat accumulating water path higher than the pressure loss of the indoor-heating water path.
  • the hot-water supply and heating system 1 according to Embodiment 4 achieves the same effect as that according to Embodiment 1. According to Embodiment 4, the same effect as that according to Embodiment 1 can be obtained by controlling the rotation angle of the movable element 32, and hence it is not necessary to add a new component, making it possible to reduce the cost.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)

Claims (3)

  1. Warmwasserversorgungs- und Heizungssystem (1), das umfasst:
    einen Warmwasserspeicher (2);
    einen ersten Wasserauslass (25), aus dem das Wasser vom Inneren des Warmwasserspeichers (2) austritt;
    einen ersten Wassereinlass (26), durch den Wasser in den Warmwasserspeicher (2) gelangt;
    einen Wassererhitzer (100), der zum Erhitzen von Wasser eingerichtet ist;
    eine Wasserpumpe (11);
    einen wärmespeichernden Wasserpfad, der den ersten Wasserauslass (25), die Wasserpumpe (11), den Wassererhitzer (100) und den ersten Wassereinlass (26) in dieser Reihenfolge miteinander verbindet;
    einen zweiten Wasserauslass (27), aus dem einer externen Innenheizvorrichtung (24) zuzuführendes Wasser austritt;
    einen zweiten Wassereinlass (28), in den das von der Innenheizvorrichtung (24) zurückgeführte Wasser eintritt;
    einen Innenheizwasserpfad, der den zweiten Wassereinlass (28), die Wasserpumpe (11), den Wassererhitzer (100) und den zweiten Wasserauslass (27) in dieser Reihenfolge miteinander verbindet; und
    ein Schaltventil (6), das eingerichtet ist, zwischen dem wärmespeichernden Wasserpfad und dem Innenheizwasserpfad umzuschalten, wobei
    ein Überlappungsbereich vorgesehen ist, in dem der wärmespeichernde Wasserpfad den Innenheizwasserpfad überlappt, dadurch gekennzeichnet, dass ein verengter Abschnitt (30) in einem Rohr (4) vorgesehen ist, das den wärmespeichernden Wasserpfad neben dem Überlappungsbereich bildet, wobei eine Strömungskanal-Querschnittsfläche des verengten Abschnitts (30) kleiner als eine Strömungskanal-Querschnittsfläche eines Rohrs ist, das den Überlappungsbereich bildet, derart dass ein Druckverlust des wärmespeichernden Wasserpfads höher als ein Druckverlust des Innenheizwasserpfads ist.
  2. Warmwasserversorgungs- und Heizungssystem (1) nach Anspruch 1, dadurch gekennzeichnet, dass
    der erste Wasserauslass (25) sich in einem unteren Teil des Warmwasserspeichers (2) befindet,
    der erste Wassereinlass (26) sich in einem oberen Teil des Warmwasserspeichers (2) befindet,
    der wärmespeichernde Wasserpfad neben dem Überlappungsbereich ein unteres Rohr (8), das mit dem ersten Wasserauslass (25) verbunden ist, und ein oberes Rohr (4), das mit dem ersten Wassereinlass (26) verbunden ist, umfasst, und
    der verengte Abschnitt (30) nicht im unteren Rohr (8), sondern im oberen Rohr (4) vorgesehen ist.
  3. Warmwasserversorgungs- und Heizungssystem (1) nach einem der vorhergehenden Ansprüche, wobei
    das Schaltventil (6) umfasst:
    ein bewegliches Element (32), das einen Durchgangskanal (34) aufweist, wobei der Durchgangskanal (34) eine Öffnung in einer Fläche des beweglichen Elements (32) bildet; und
    ein Gehäuseelement, das eine Mehrzahl von Öffnungen aufweist und das bewegliche Element (32) aufnimmt, wobei
    ein Teil der Öffnung des Durchgangskanals (34) des beweglichen Elements (32) mit dem Gehäuseelement abgedeckt ist, wenn das Schaltventil (6) auf den wärmespeichernden Wasserpfad umschaltet.
EP14902428.3A 2014-09-26 2014-09-26 Heisswasserversorgungs- und -erwärmungssystem Active EP3199884B1 (de)

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EP3199884B1 true EP3199884B1 (de) 2022-07-27

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WO2018142473A1 (ja) * 2017-01-31 2018-08-09 三菱電機株式会社 熱媒体循環システム
CN108488881A (zh) * 2018-03-30 2018-09-04 河南三张节能环保工程有限公司 一种基于水地双热源的热源存储控制系统
WO2019198196A1 (ja) * 2018-04-12 2019-10-17 三菱電機株式会社 暖房システム
CN108895514B (zh) * 2018-04-28 2021-01-08 大连海心信息工程有限公司 全网分布式蓄热供热系统和方法
CN110332595A (zh) * 2019-06-05 2019-10-15 北京航天控制仪器研究所 一种结合分布式光纤测温主机的自控蓄热系统
TWI710738B (zh) * 2019-06-19 2020-11-21 建造金屬工業股份有限公司 電熱水器區間加熱裝置

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Publication number Priority date Publication date Assignee Title
JPH11153329A (ja) * 1997-11-25 1999-06-08 Mitsubishi Electric Corp 電気温水器
JP2006010187A (ja) * 2004-06-24 2006-01-12 Corona Corp 貯湯式給湯暖房装置
JP4138712B2 (ja) * 2004-08-04 2008-08-27 株式会社コロナ 貯湯式温水装置
JP4223468B2 (ja) * 2004-12-01 2009-02-12 株式会社コロナ 貯湯式給湯暖房装置
JP2008014585A (ja) * 2006-07-06 2008-01-24 Denso Corp ブライン放熱式暖房装置
DE102007044023A1 (de) * 2007-09-14 2009-04-02 Robert Bosch Gmbh Pufferspeicher
JP4750834B2 (ja) * 2008-09-08 2011-08-17 株式会社デンソー 貯湯式給湯暖房装置
DE102009037710A1 (de) * 2009-07-28 2011-02-03 Max Weishaupt Gmbh Ladevorrichtung zum Einschichten eines temperierten Mediums in einen Schichtenspeicher
EP2469195B1 (de) * 2009-09-29 2017-10-25 Mitsubishi Electric Corporation Wärmespeichernde wassererhitzungs- und klimaanlagenvorrichtung

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JP6252685B2 (ja) 2017-12-27
WO2016046978A1 (ja) 2016-03-31
EP3199884A1 (de) 2017-08-02
EP3199884A4 (de) 2018-06-20

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