WO2013069734A1 - 温水加熱システム並びに制御装置及び制御方法 - Google Patents

温水加熱システム並びに制御装置及び制御方法 Download PDF

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Publication number
WO2013069734A1
WO2013069734A1 PCT/JP2012/078995 JP2012078995W WO2013069734A1 WO 2013069734 A1 WO2013069734 A1 WO 2013069734A1 JP 2012078995 W JP2012078995 W JP 2012078995W WO 2013069734 A1 WO2013069734 A1 WO 2013069734A1
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WIPO (PCT)
Prior art keywords
temperature
water
unit
heating
heating unit
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PCT/JP2012/078995
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English (en)
French (fr)
Japanese (ja)
Inventor
小野　仁意
紀行 松倉
Original Assignee
三菱重工業株式会社
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Application filed by 三菱重工業株式会社 filed Critical 三菱重工業株式会社
Priority to EP12847838.5A priority Critical patent/EP2778555B1/de
Priority to KR1020147002043A priority patent/KR101560511B1/ko
Priority to CN201280036536.8A priority patent/CN103703323B/zh
Publication of WO2013069734A1 publication Critical patent/WO2013069734A1/ja

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Classifications

    • 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
    • F24H4/00—Fluid heaters characterised by the use of heat pumps
    • F24H4/02—Water heaters
    • 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
    • F24H15/10—Control of fluid heaters characterised by the purpose of the control
    • F24H15/174—Supplying heated water with desired temperature or desired range of temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/20—Arrangement or mounting of control or safety devices
    • F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
    • 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
    • F24H15/227—Temperature of the refrigerant in heat pump cycles
    • F24H15/232—Temperature of the refrigerant in heat pump cycles at the condenser
    • 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
    • F24H15/375—Control of heat pumps
    • F24H15/38—Control of compressors of 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
    • F24H15/40—Control of fluid heaters characterised by the type of controllers
    • F24H15/414—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2339/00—Details of evaporators; Details of condensers
    • F25B2339/04—Details of condensers
    • F25B2339/047—Water-cooled condensers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F25B2600/2515—Flow valves

Definitions

  • the present invention relates to a warm water heating system that heats warm water using a warm output heat exchanger provided in a heat pump, and a control device and a control method for the warm water heating system.
  • a hot water system that supplies hot water has a heat storage tank.
  • a part of the water stored in the heat storage tank is controlled in temperature by obtaining heat from a heat output heat exchanger provided in the main body of the hot water heat pump (for example, a patent) Reference 1).
  • Patent Document 1 has a problem that the installation cost and the installation space are increased because the heat storage tank is provided in the hot water system. Moreover, since the water stored in the heat storage tank is circulated to the heat output heat exchanger to raise the temperature of the water in the heat storage tank, there is a problem that it takes time to raise the temperature.
  • Patent Document 2 a three-way valve is provided in the hot water system, and a part of the output of hot water from the thermal output heat exchanger is circulated to the thermal output heat exchanger, and the temperature of the inlet of the thermal output heat exchanger is set to a predetermined value. A method for controlling the target temperature is described. By using this method, the heating rate of the hot water system can be increased.
  • This invention is made in view of said problem, and makes it a subject to provide the warm water heating system, the control apparatus, and the control method which control appropriately the temperature increase rate in the transient state of a warm water system
  • the present invention includes a heat pump having a heat output heat exchanger that draws heat from a heat source system and outputs heat, a heating unit that heats water with the heat obtained from the heat output heat exchanger, and water heated by the heating unit An outflow part that causes the heating part to flow out, a circulation part that circulates water heated by the heating part to the upstream side of the heating part, an inflow part that causes water to flow from the heating object to the upstream side of the heating part, and A control device for controlling a hot water heating system comprising an adjustment unit that adjusts the flow distribution of water from the heating unit to the outflow unit and the circulation unit, and sets a target temperature of water upstream of the heating unit The upstream target temperature setting unit, and the adjustment so that the temperature of the water upstream of the heating unit increases by a predetermined temperature until the temperature of the water upstream of the heating unit reaches the target temperature. Of flow distribution by And an adjustment amount determining unit determined.
  • the adjustment amount determination unit is configured such that the water circulating in the heating unit, the water circulated by the circulation unit, until the temperature of the water on the upstream side of the heating unit reaches the target temperature, And the flow distribution by the adjusting unit so that the temperature of the water upstream of the heating unit rises by a predetermined temperature calculated based on the state of the water flowing from the inflow unit to the upstream side of the heating unit. It is preferable to determine the adjustment amount.
  • the temperature of the difference between the temperature of the water mixed with the water flowing into the upstream side of the heating unit and the water circulated by the circulation unit and the temperature of the water flowing through the heating unit is set to the adjustment amount.
  • An adjustment temperature calculation unit that calculates the adjustment temperature used for the determination, and the adjustment amount determination unit calculates the adjustment temperature calculated by the adjustment temperature calculation unit until the temperature of water upstream of the heating unit reaches the target temperature. Therefore, it is preferable to determine the adjustment amount of the flow distribution by the adjustment unit so that the temperature of the water on the upstream side of the heating unit increases.
  • the adjustment amount determination unit determines the adjustment amount of the flow distribution by the adjustment unit so that the temperature of the water flowing into the heating unit is constant until the heat pump is operated. Is preferred.
  • the upstream target temperature setting unit is based on a maximum heating amount in the heating unit, a flow rate of water flowing into the heating unit, and a target temperature of water downstream of the heating unit. It is preferable to set a target temperature of water upstream of the heating unit.
  • a downstream target temperature setting unit that sets a target temperature of water downstream of the heating unit, and a predetermined temperature until the temperature of water downstream of the heating unit reaches the target temperature. It is preferable to include a heat pump adjustment amount determination unit that determines the adjustment amount of the heat pump control so that the temperature of the water on the downstream side of the heating unit increases.
  • the said heat pump adjustment amount determination part is distribute
  • circulating to the said heating part based on the state which the water distribute
  • the temperature of the difference between the temperature of the water when heated by the heating unit and the temperature of the water flowing from the heating unit to the adjustment unit is calculated as the heat pump adjustment temperature used to determine the adjustment amount for heat pump control
  • a heat pump adjustment temperature calculation unit wherein the heat pump adjustment amount determination unit heats only the heat pump adjustment temperature calculated by the heat pump adjustment temperature calculation unit until the temperature of water downstream of the heating unit reaches the target temperature. It is preferable to determine the adjustment amount of the heat pump control so that the temperature of the water on the downstream side of the section rises.
  • the present invention also includes a heat pump having a heat output heat exchanger that draws heat from a heat source system and outputs heat, a heating unit that heats water by the heat obtained from the heat output heat exchanger, and the heating unit is heated An outflow part that causes the heated water to flow out to the heating target, a circulation part that circulates the water heated by the heating part to the upstream side of the heating part, and an inflow part that flows water from the heating target to the upstream side of the heating part;
  • a control device for controlling a hot water heating system comprising: a downstream target temperature setting unit that sets a target temperature of water downstream of the heating unit; and a temperature of water downstream of the heating unit is the target
  • a heat pump adjustment amount determining unit that determines an adjustment amount of heat pump control so that the temperature of water downstream of the heating unit is increased by a predetermined temperature until the temperature is reached.
  • the heat pump adjustment amount determination unit is configured such that the water flowing through the heating unit and the water flowing out from the heating unit until the temperature of the water downstream of the heating unit reaches the target temperature. It is preferable that the adjustment amount of the heat pump control is determined so that the temperature of the water on the downstream side of the heating unit is increased by a predetermined temperature calculated based on the state and the heating amount in the heating unit.
  • the water flowing through the heating unit is the heating unit.
  • a heat pump adjustment temperature calculation unit that calculates the temperature of the difference between the temperature of the water when heated by and the temperature of the water flowing out of the heating unit as a heat pump adjustment temperature used to determine the adjustment amount of the heat pump control,
  • the heat pump adjustment amount determination unit determines the temperature of water downstream of the heating unit by the heat pump adjustment temperature calculated by the heat pump adjustment temperature calculation unit until the temperature of water downstream of the heating unit reaches the target temperature. It is preferable to determine the adjustment amount of the heat pump control so as to increase.
  • the present invention also includes a heat pump having a heat output heat exchanger that draws heat from a heat source system and outputs heat, a heating unit that heats water by the heat obtained from the heat output heat exchanger, and the heating unit is heated An outflow part that causes the heated water to flow out to the heating target, a circulation part that circulates the water heated by the heating part to the upstream side of the heating part, and an inflow part that flows water from the heating target to the upstream side of the heating part; An adjustment unit that adjusts a flow rate distribution of water from the heating unit to the circulation unit and the outflow unit, and the control device.
  • a heat pump having a heat output heat exchanger that draws heat from a heat source system and outputs heat, a heating unit that heats water by the heat obtained from the heat output heat exchanger, and the heating unit is heated
  • An outflow part that causes the heated water to flow out to the heating target, a circulation part that circulates the water heated by the heating part to the upstream side of the heating part, and an inflow part
  • the present invention also includes a heat pump having a heat output heat exchanger that draws heat from a heat source system and outputs heat, a heating unit that heats water by the heat obtained from the heat output heat exchanger, and the heating unit is heated An outflow part that causes the heated water to flow out to the heating target, a circulation part that circulates the water heated by the heating part to the upstream side of the heating part, and an inflow part that flows water from the heating target to the upstream side of the heating part;
  • a control method for controlling the adjustment amount of the adjustment unit of the hot water heating system comprising an adjustment unit for adjusting a flow rate distribution of water from the heating unit to the circulation unit and the outflow unit, and upstream of the heating unit Determining the target temperature of the water on the side, and increasing the temperature of the water upstream of the heating unit by a predetermined temperature until the temperature of the water upstream of the heating unit reaches the target temperature , Flow rate distribution by the adjustment unit And a step of determining the adjustment amount.
  • the present invention also includes a heat pump having a heat output heat exchanger that draws heat from a heat source system and outputs heat, a heating unit that heats water by the heat obtained from the heat output heat exchanger, and the heating unit is heated An outflow part that causes the heated water to flow out to the heating target, a circulation part that circulates the water heated by the heating part to the upstream side of the heating part, and an inflow part that flows water from the heating target to the upstream side of the heating part;
  • a control device for controlling an adjustment amount of a heat pump of a hot water heating system comprising: a step of determining a target temperature of water downstream of the heating unit; and a temperature of water downstream of the heating unit is the target Determining the adjustment amount of the heat pump control so that the temperature of the water downstream of the heating unit rises by a predetermined temperature until the temperature is reached.
  • the adjustment amount by the adjustment unit is set such that the temperature of the hot water upstream or downstream of the heating unit is increased by a predetermined temperature until the temperature of the hot water upstream of the heating unit reaches the target temperature.
  • the adjustment amount of the heat pump is determined. Thereby, the temperature increase rate in the transient state of the hot water system can be appropriately controlled.
  • FIG. 1 is a schematic configuration diagram of a hot water heating system according to a first embodiment of the present invention. It is a schematic block diagram which shows the structure of the control apparatus by the 1st Embodiment of this invention. It is a flowchart which shows operation
  • FIG. 1 is a schematic configuration diagram of a hot water heating system according to a first embodiment of the present invention.
  • the hot water heating system includes a heat pump 20 that draws heat from the heat source system 10 and outputs the heat, a hot water system 30 that heats water using the heat output from the heat pump 20, and a control device 40 that controls the hot water system 30.
  • the heat pump 20 includes a pipe filled with a heat medium, an evaporator 21, a compressor 22, a condenser 24 (heat output heat exchanger) and an expansion valve 25 connected to the pipe.
  • the evaporator 21 increases the temperature of the heat medium by the heat output from the heat source system 10.
  • the compressor 22 compresses and liquefies the heat medium heated by the evaporator 21.
  • the vane 23 adjusts the flow rate of the heat medium liquefied by the compressor 22.
  • the condenser 24 supplies the heat of the heat medium flowing from the vane 23 to the hot water system 30.
  • the expansion valve 25 decompresses and vaporizes the heat medium cooled by the condenser 24.
  • the hot water system 30 includes an inflow part 31, a circulation pump 32, a heating part 33, a three-way valve 34 (adjustment part), a circulation part 35, and an outflow part 36.
  • the inflow part 31 allows water to flow into the heating part 33 through the circulation pump 32 from the heating target.
  • the circulation pump 32 pumps inflowed water to the heating unit 33.
  • the heating unit 33 heats the water flowing in from the circulation pump 32 by the heat supplied from the condenser 24, and supplies the heated water to the three-way valve 34.
  • the three-way valve 34 causes a part of the water heated by the heating unit 33 to flow into the circulation unit 35 and the rest into the outflow unit 36 according to the opening degree (flow rate distribution).
  • the circulation unit 35 circulates water from the three-way valve 34 to the heating unit 33 via the circulation pump 32.
  • the outflow portion 36 causes water to flow out from the three-way valve 34 to the heating target.
  • the hot water system 30 is provided with an inflow part flow detector 51, an inflow part temperature detector 52, a heating part flow rate detector 53, a heating part upstream side temperature detector 54, and a heating part downstream side temperature detector 55.
  • the inflow portion flow detector 51 detects the flow rate F 1 of the water flowing through the inflow portion 31.
  • the inflow portion temperature detector 52 detects the temperature T 1 of the water flowing through the inflow portion 31.
  • the heating unit flow rate detector 53 detects the flow rate F 2 of water flowing through the heating unit 33.
  • the heating unit upstream temperature detector 54 detects the temperature of water on the upstream side of the heating unit 33. That is, the heating unit upstream temperature detector 54 detects the temperature T 2 of the water before being heated in the heating unit 33.
  • the heating unit downstream temperature detector 55 detects the temperature of water on the downstream side of the heating unit 33. That is, the heating unit downstream temperature detector 55 detects the temperature T 3 of water after being heated in the heating unit 33.
  • FIG. 2 is a schematic block diagram showing the configuration of the control device 40 according to the first embodiment of the present invention.
  • the control device 40 includes a sensor information acquisition unit 401, an upstream temperature change rate calculation unit 402 (adjusted temperature calculation unit), an upstream target temperature setting unit 403, a heat pump information input unit 404, an upstream side target temperature setting unit 405, three-way A valve control unit 406 (adjustment amount determination unit) is provided.
  • the sensor information acquisition unit 401 acquires sensor information (flow rate / temperature) detected by each detector provided in the hot water system 30.
  • the upstream temperature change rate calculation unit 402 calculates the water temperature change rate (adjusted temperature) on the upstream side of the heating unit 33, that is, the water temperature increase rate, based on the sensor information acquired by the sensor information acquisition unit 401.
  • the rate of change in water temperature is calculated by applying sensor information to a heat balance model.
  • the upstream target temperature setting unit 403 sets the target temperature of water on the upstream side of the heating unit 33 when the hot water system 30 is in a steady state when the heat pump 20 and the hot water system 30 are in operation.
  • the heat pump information input unit 404 receives input of heat pump information indicating whether or not the compressor 22 of the heat pump 20 has started operation.
  • the upstream-side target temperature setting unit 405 includes a sensor information acquisition unit 401, an upstream temperature change rate calculation unit 402, an upstream target temperature setting unit 403, and a heating unit at the current time according to information acquired from the heat pump information input unit 404.
  • the target temperature of the water in the upstream of 33 is set.
  • the upstream side target temperature setting unit 405 sets the current water temperature on the upstream side of the heating unit 33 to the target temperature for the time being when the compressor 22 of the heat pump 20 is not operating. To do. That is, the target temperature is set for the time being so as to preserve the current water temperature.
  • the upstream side target temperature setting unit 405 is configured so that, after the compressor 22 is operated, until the current water temperature on the upstream side of the heating unit 33 reaches the upstream target temperature, the upstream temperature change rate calculation unit 402 The target temperature for the time being is set based on the calculated temperature change rate. Then, after the current water temperature on the upstream side of the heating unit 33 reaches the upstream target temperature, the upstream-side target temperature setting unit 405 uses the target temperature set by the upstream target temperature setting unit 403 as the current target temperature. Set to.
  • the three-way valve control unit 406 performs three-way control by PID (Proportional / Integral / Differential) based on the current target temperature set by the upstream current target temperature setting unit 405 and the current water temperature upstream of the current heating unit 33.
  • PID Proportional / Integral / Differential
  • FIG. 3 is a flowchart showing the operation of the control device 40 according to the first embodiment of the present invention.
  • the upstream target temperature setting unit 403 of the control device 40 receives an input of the target temperature T2d on the upstream side of the heating unit 33 from the administrator before the operation of the hot water heating system is started (step S1).
  • the administrator of the hot water heating system operates the hot water system 30 after setting the target temperature.
  • the upstream-side target temperature setting unit 405 determines whether or not the heat pump information received by the heat pump information input unit 404 indicates the operation start of the compressor 22 (step S2). .
  • the heat pump information indicates the start of operation of the compressor 22 when the administrator of the hot water heating system operates the compressor 22.
  • the upstream-side target temperature setting unit 405 determines that the heat pump information indicates that the compressor 22 has not been operated yet (step S2: NO), from the sensor information acquisition unit 401, the heating unit upstream side get the temperature T 2 of the temperature detector 54 has detected, to set the temperature T 2 of the temperature on the upstream side of the heating unit 33 to the immediate target temperature T 2a (step S3).
  • the three-way valve control unit 406 determines the opening degree so that the water temperature on the upstream side of the heating unit 33 is constant at the target temperature T 2a for the time being, that is, the current temperature T 2.
  • the valve 34 is controlled (step S4).
  • the three-way valve control unit 406 controls the opening degree of the three-way valve 34 so that the amount of water that cools the heat generated by the circulation pump 32 flows from the inflow unit 31.
  • the three-way valve 34 is adjusted to an opening degree that is slightly closed from the fully open state relative to the circulation part 35, that is, an opening degree that is slightly open relative to the outflow part 36.
  • the operations of steps S2 to S4 are repeatedly executed until the compressor 22 operates.
  • the upstream side target temperature setting unit 405 detects the heating unit upstream temperature from the sensor information acquisition unit 401.
  • vessel 54 acquires the temperature T 2 detected.
  • the upstream side immediate target temperature setting unit 405 determines the temperature T 2 is, whether the upstream-side target temperature setting unit 403 has reached the target temperature T 2d set (step S5).
  • Upstream immediate target temperature setting unit 405 if the temperature T 2 is determined to be less than the target temperature T 2d (Step S5: NO), temperatures T 1 to the sensor information acquisition unit 401 acquires, T 2, T 3 and A temperature change rate dT 2 / dt on the upstream side of the heating unit 33 is calculated using the heat medium flow rates F 1 and F 2 (step S6).
  • the temperature T 1 is the temperature of water flowing through the inflow portion 31.
  • the temperature T 2 is the temperature of water on the upstream side of the heating unit 33.
  • the temperature T 3 is the temperature of the water in the downstream side of the heating portion 33.
  • the flow rate F 1 is the flow rate of water flowing through the inflow portion 31.
  • the flow rate F 2 is a flow rate of water flowing through the heating unit 33.
  • the upstream temperature change rate calculation unit 402 calculates the temperature change rate dT 2 / dt by substituting each sensor information into Equation (1) indicating the heat balance model shown below.
  • M shows the amount of water which the heating part 33 holds.
  • cp n (n is a natural number) indicates the specific heat of water at the temperature T n . Since the specific heat is determined by the water temperature, the upstream temperature change rate calculation unit 402 calculates the specific heat cp n according to the temperature T n .
  • Q pump indicates the amount of heat input to the water in the circulation pump 32. Incidentally, the circulating pump 32 for heat in water determined by the rotational speed, power consumption as well as characteristics of the flow rate F 2 and the circulation pump 32 of the water passing through the circulation pump 32, the upstream temperature change rate calculating unit 402, of The amount of heat input Q pump is calculated according to the value.
  • the upstream temperature change rate calculation unit 402 sets the water amount M, the specific heat cp n , and the heat input amount Q pump as transient state data during actual operation.
  • the estimation accuracy may be improved by identifying based on the above.
  • the denominator on the right side of Equation (1) indicates the heat capacity of water held by the heating unit 33.
  • the numerator on the right side of the formula (2) circulates in the heating unit 33 and the heat quantity of water in which water flowing from the inflow unit 31 to the upstream side of the heating unit 33 and water circulated by the circulation unit 35 are mixed.
  • the calorific value of the difference from the calorific value of the water is shown. That is, the temperature change rate dT 2 / dt is circulated through the heating unit 33 and the temperature of the water in which the water flowing from the inflow unit 31 to the upstream side of the heating unit 33 and the water circulated by the circulation unit 35 are mixed. It is calculated by the difference with the temperature of the water.
  • the upstream target temperature setting unit 405 adds a value obtained by adding the temperature change rate calculated by the upstream temperature change rate calculation unit 402 to the temperature T 2 acquired by the sensor information acquisition unit 401 for the time being the target temperature T 2a.
  • the three-way valve control unit 406 the water temperature of the upstream side of the heating unit 33 determines the degree of opening so immediate becomes the target temperature T 2a, and controls the three-way valve 34 based on the opening degree (step S8) .
  • the three-way valve control unit 406 until the water temperature T 2 of the upstream side of the heating unit 33 reaches the target temperature T 2d, according to the characteristics of the hot water system 30 (each part temperature, flow rate, and water retention capacity of the heating portion 33) Further, the opening degree of the three-way valve 34 can be controlled at an appropriate temperature change rate. Thereafter, in step S5 until the temperature T 2 reaches the target temperature T 2d, repeats the operations of steps S5 ⁇ step S8.
  • step S5 the upstream side immediate target temperature setting unit 405, if the temperature T 2 is determined to have reached the target temperature T 2d (Step S5: YES), the target temperature T 2d sets the immediate target temperature T 2a (Step S9).
  • the three-way valve control unit 406 determines the opening degree so that the water temperature on the upstream side of the heating unit 33 becomes the target temperature T 2a for the time being, that is, the target temperature T 2d , and the three-way valve 34 is set based on the opening degree. Control (step S10). Thereafter, the control device 40 ends the control of the three-way valve 34 in the transient state, and starts the steady-state control for controlling the opening degree of the three-way valve 34 based on the target temperature T2d .
  • the control of the three-way valve 34 in the steady state is the same as the process of repeatedly executing Step S9 and Step S10.
  • the three-way valve control unit 406 performs heating by a predetermined temperature until the temperature of the water on the upstream side of the heating unit 33 reaches the target temperature T2d after the heat pump 20 is operated.
  • the opening degree of the three-way valve 34 is controlled so that the temperature of the water on the upstream side of the section 33 increases.
  • the opening degree of the three-way valve 34 can be controlled to such an extent that the opening / closing operation of the three-way valve 34 can follow the temperature change of the hot water.
  • the predetermined temperature is calculated based on the state of water flowing through the heating unit 33, water circulating through the circulation unit 35, and water flowing from the inflow unit 31 to the upstream side of the heating unit 33. Is done.
  • the opening degree of the three-way valve 34 can be controlled according to the characteristics of the hot water heating system, and the water temperature on the upstream side of the heating unit 33 can be raised to the target temperature T 2a at an appropriate temperature rising rate.
  • the temperature of the water in which the water flowing from the inflow portion 31 to the upstream side of the heating portion 33 and the water circulated by the circulation portion 35 is mixed with the water flowing through the heating portion 33.
  • the temperature change rate dT 2 / dt which is the temperature that is the difference from the water temperature, it is possible to control the opening degree appropriately.
  • the three-way valve control unit 406 has described the case where the opening degree is controlled using the temperature change rate dT 2 / dt calculated by the upstream temperature change rate calculation unit 402, but the present invention is not limited to this.
  • the opening degree of the three-way valve 34 may be controlled so that the water temperature on the upstream side of the heating unit 33 is increased by another predetermined temperature. However, if the predetermined temperature is set too low, the opening degree is controlled so as to open with respect to the outflow portion 36, the temperature rise of the water temperature upstream of the heating portion 33 is delayed, and the hot water system 30 is in a steady state. It takes time to change to the state.
  • the opening degree is controlled to open with respect to the circulation unit 35, the temperature of the water on the upstream side of the heating unit 33 increases rapidly, and the three-way valve 34 is opened and closed.
  • the operation may not be able to follow the temperature change of the hot water. In this case, there is a problem that the amount of heat exchanged in the condenser 24 of the heat pump 20 is reduced, and the efficiency of the hot water heating system is deteriorated.
  • FIG. 4 is a schematic configuration diagram of a hot water heating system according to the second embodiment of the present invention.
  • the hot water heating system according to the second embodiment includes the heat source upstream temperature detector 56 and the heat source flow rate detector 57 in the hot water system 30 of the hot water heating system according to the first embodiment, and the operation of the control device 40. Is different.
  • the heat source upstream temperature detector 56 detects the temperature T 4 of hot water on the upstream side of the heat source system 10.
  • the heat source flow rate detector 57 detects the flow rate F 3 of hot water flowing through the heat source system 10.
  • FIG. 5 is a schematic block diagram showing the configuration of the control device 40 according to the second embodiment of the present invention.
  • the control device 40 according to the second embodiment includes a downstream target temperature setting unit 407 in addition to the configuration of the control device 40 according to the first embodiment, and the operation of the upstream target temperature setting unit 403 is different.
  • the downstream target temperature setting unit 407 sets the target temperature of water on the downstream side of the heating unit 33 when the hot water system 30 is in a steady state when the heat pump 20 and the hot water system 30 are operating.
  • the upstream target temperature setting unit 403 is configured to supply water on the upstream side of the heating unit 33 when the hot water system 30 is in a steady state. Set the target temperature.
  • control device 40 at the start of operation of the hot water heating system according to the present embodiment.
  • the operation of the control device 40 according to the second embodiment is different from the operation of the control device 40 in the first embodiment and the operation in step S1, and the operations after step S1 are the same as those in the first embodiment. is there.
  • step S1 in the second embodiment the downstream target temperature setting unit 407 of the control device 40 receives an input of the target temperature T 3d on the downstream side of the heating unit 33 from the administrator before the operation of the hot water heating system is started.
  • the upstream target temperature setting unit 403 acquires the temperature T 4 and the flow rate F 3 detected by the heat source upstream temperature detector 56 and the heat source flow rate detector 57 from the sensor information acquisition unit 401.
  • the upstream target temperature setting unit 403 calculates the maximum heating amount of the condenser 24 at the maximum output of the heat pump 20 based on the acquired temperature T 4 and flow rate F 3 .
  • the upstream-side target temperature setting unit 403 the maximum heating amount calculated on the basis of the target temperature T 3d flow F 2 and the downstream side of the water flowing through the heating unit 33, the target temperature T on the upstream side of the heating portion 33 2d is calculated.
  • the upstream side target temperature setting unit 403 sets the water temperature on the upstream side of the heating unit 33 required for setting the water temperature on the downstream side of the heating unit 33 to the target temperature T 3d by the maximum output of the heat pump 20 as the target temperature. Let T 2d .
  • strain 30 can be controlled so that the capability of the heat pump 20 may be utilized to the maximum.
  • FIG. 6 is a schematic configuration diagram of a hot water heating system according to a third embodiment of the present invention.
  • the hot water heating system according to the third embodiment includes a condenser temperature detector 58 in the hot water system 30 of the hot water heating system according to the first embodiment, and the operation of the control device 40 is different. Further, in the hot water heating system according to the third embodiment, the inflow portion temperature detector 52 and the inflow portion flow rate detector 51 may not be provided.
  • the condenser temperature detector 58 detects the temperature T 5 of the condenser 24 of the heat pump 20.
  • FIG. 7 is a schematic block diagram showing the configuration of the control device 40 according to the third embodiment of the present invention.
  • the control device 40 according to the third embodiment includes a sensor information acquisition unit 401, a downstream temperature change rate calculation unit 408 (heat pump adjustment temperature calculation unit), a downstream target temperature setting unit 407, a downstream immediate target temperature setting unit 409, A vane control unit 410 (heat pump adjustment amount determination unit) is provided.
  • the sensor information acquisition unit 401 acquires sensor information (flow rate / temperature) detected by each detector provided in the hot water system 30 and the condenser 24.
  • the downstream temperature change rate calculation unit 408 calculates the water temperature change rate (heat pump adjustment temperature) on the downstream side of the heating unit 33, that is, the water temperature increase rate, based on the sensor information acquired by the sensor information acquisition unit 401.
  • the rate of change in water temperature is calculated by applying sensor information to a heat balance model.
  • the downstream target temperature setting unit 407 sets the target temperature of water on the downstream side of the heating unit 33 when the hot water system 30 is in a steady state when the heat pump 20 is operated.
  • the downstream-side target temperature setting unit 409 is configured to detect water on the downstream side of the heating unit 33 at the current time according to information acquired from the sensor information acquisition unit 401, the downstream-side temperature change rate calculation unit 408, and the downstream-side target temperature setting unit 407. Set the target temperature for the time being. Specifically, the downstream-side target temperature setting unit 409 sets the temperature change rate calculated by the downstream temperature change rate calculation unit 408 until the current water temperature on the downstream side of the heating unit 33 reaches the downstream target temperature. Based on this, set the target temperature for the time being. Then, after the current water temperature on the downstream side of the heating unit 33 reaches the downstream target temperature, the downstream side target temperature setting unit 409 uses the target temperature set by the downstream side target temperature setting unit 407 as the current target temperature. Set to.
  • the vane control unit 410 controls the opening degree of the vane 23 by PID control based on the current target temperature set by the downstream immediate target temperature setting unit 409 and the current water temperature downstream of the current heating unit 33. .
  • FIG. 8 is a flowchart showing the operation of the control device 40 according to the third embodiment of the present invention.
  • the downstream target temperature setting unit 407 of the control device 40 receives an input of the target temperature T 3d on the downstream side of the heating unit 33 from the administrator before the operation of the hot water heating system is started (step S11).
  • the administrator of the hot water heating system operates the hot water system 30 after setting the target temperature, and then operates the compressor 22.
  • the downstream-side target temperature setting unit 409 acquires the temperature T 3 detected by the heating unit downstream-side temperature detector 55 from the sensor information acquisition unit 401. Then downstream immediate target temperature setting unit 409 determines the temperature T 3 is, whether or not reached the target temperature T 3d downstream-side target temperature setting unit 407 is set (step S12).
  • Step S12 when the temperature T 3 is determined to be less than the target temperature T 3d (Step S12: NO), the temperature T 2, T 3 to the sensor information acquisition unit 401 acquires, T 5 and A temperature change rate dT 3 / dt on the downstream side of the heating unit 33 is calculated using the heat medium flow rate F 2 (step S13).
  • the temperature T 2 is the temperature of water on the upstream side of the heating unit 33.
  • the temperature T 3 is the temperature of the water in the downstream side of the heating portion 33.
  • the temperature T 5 is the temperature of the heat medium in the condenser 24.
  • the flow rate F 2 is a flow rate of water flowing through the heating unit 33.
  • the downstream temperature change rate calculation unit 408 calculates the temperature change rate dT 3 / dt by substituting each sensor information into Expression (2) indicating the heat balance model shown below.
  • U and A indicate the overall heat transfer coefficient and heat transfer area of the condenser 24, respectively.
  • the values of U and A may be calculated in advance as design values of the heat pump 20, but are not limited thereto, and may be identified from data in a steady state during actual machine operation.
  • U ⁇ A can be calculated by the following equation (3).
  • the denominator on the right side of Expression (2) indicates the heat capacity of water held by the heating unit 33.
  • the numerator on the right side of the formula (2) is the sum of the amount of water flowing through the heating unit 33 and the amount of heat heated by the heating unit 33, and the amount of water flowing into the three-way valve 34 from the heating unit 33.
  • the amount of heat of the difference is shown. That is, the temperature change rate dT 3 / dt is the temperature between the water flowing through the heating unit 33 when the water is heated by the heating unit 33 and the temperature of the water flowing into the three-way valve 34 from the heating unit 33. Calculated by difference.
  • the downstream target temperature setting unit 409 adds the value obtained by adding the temperature change rate calculated by the downstream temperature change rate calculation unit 408 to the temperature T 3 acquired by the sensor information acquisition unit 401, for the time being the target temperature T 3a.
  • the vane control unit 410 the water temperature of the downstream side of the heating unit 33 determines the degree of opening of the vane 23, as immediate becomes the target temperature T 3a, controls the vane 23 so as to be the opening (step S15 ).
  • the vane controller 410 until the water temperature T 3 on the downstream side of the heating unit 33 reaches the target temperature T 3d, at a suitable temperature change rate in accordance with the characteristics of the heating unit 33, controls the opening of the vanes 23 can do. Thereafter, the temperature T 3 to reach the target temperature T 3d, it repeats the operations of steps S12 ⁇ step S15 in step S12.
  • step S12 the downstream immediate target temperature setting unit 409, when the temperature T 3 is determined to have reached the target temperature T 3d (Step S12: YES), the target temperature T 3d set the immediate target temperature T 3a (Step S16).
  • the vane control unit 410 determines the opening degree so that the water temperature on the downstream side of the heating unit 33 becomes the target temperature T 3a , that is, the target temperature T 3d for the time being, and controls the vane 23 with the opening degree (step) S17).
  • the control device 40 ends the control of the compressor 22 in the transient state, and starts the steady state control for controlling the opening degree of the vane 23 based on the target temperature T3d .
  • control of the vane 23 in a steady state is the same as the process which repeatedly performs step S16 and step S17.
  • the vane control unit 410 is configured to increase the heating unit by a predetermined temperature until the temperature of the water on the downstream side of the heating unit 33 reaches the target temperature T3d after the heat pump 20 is operated.
  • the opening degree of the vane 23 is controlled so that the temperature of the water downstream of 33 increases. Thereby, when the hot water system 30 is in a transient state, the opening degree of the vane 23 can be controlled to such an extent that the opening degree control of the vane 23 can follow the temperature change of the hot water.
  • the predetermined temperature is calculated based on the state of the water flowing through the heating unit 33, the state of the water flowing from the heating unit 33 into the three-way valve 34, and the heating amount in the heating unit 33.
  • the opening degree of the vane 23 can be controlled in accordance with the characteristics of the hot water heating system, and the water temperature on the downstream side of the heating unit 33 can be raised to the target temperature T 3a at an appropriate rate of temperature increase.
  • the temperature change rate dT 3 / dt which is the temperature of, an appropriate opening degree can be controlled.
  • the vane control unit 410 has described the case where the opening degree is controlled using the temperature change rate dT 3 / dt calculated by the downstream temperature change rate calculation unit 408, but the present invention is not limited to this. You may make it control the opening degree of the vane 23 so that the water temperature of the downstream of the heating part 33 rises only by other predetermined temperature. However, if the predetermined temperature is set too low, the rate of increase in the opening degree is controlled and the temperature is controlled slightly, the temperature of the water temperature on the downstream side of the heating unit 33 increases slowly, and the hot water system 30 transitions to a steady state. It will take time to do.
  • the rate of increase in the opening degree is controlled to be high, the temperature of the water temperature on the downstream side of the heating unit 33 is increased rapidly, and the opening degree control of the vane 23 is controlled by the hot water. It may become impossible to follow the temperature change. In this case, there is a problem that the amount of heat exchanged in the condenser 24 of the heat pump 20 is reduced, and the efficiency of the hot water heating system is deteriorated.
  • the hot water heating system controls the opening degree of the three-way valve 34 based on the state of the hot water system 30 as in the second embodiment, and the hot water system 30 as in the third embodiment.
  • the opening degree of the vane 23 of the heat pump 20 is controlled based on the state of the heating unit 33.
  • FIG. 9 is a schematic configuration diagram of a hot water heating system according to a fourth embodiment of the present invention.
  • the hot water heating system according to the fourth embodiment has both the configuration of the hot water heating system according to the second embodiment and the configuration of the hot water heating system according to the third embodiment.
  • the configuration of the control device 40 according to the fourth embodiment also has the configuration of the control device 40 according to the second embodiment and the configuration of the control device 40 according to the third embodiment.
  • the operation of the hot water heating system according to the fourth embodiment is a combination of the operation of the second embodiment and the operation of the third embodiment. Specifically, when the downstream target temperature is set in step S11 of the third embodiment, the upstream target temperature is calculated in step S1 of the second embodiment using the downstream target temperature. Do. In steps S2 to S4 according to the second embodiment, the control device 40 performs only the opening degree control of the three-way valve 34. On the other hand, the control device 40 executes the processes of steps S12 to S15 according to the third embodiment in parallel while executing the processes of steps S5 to S8. And the control apparatus 40 performs the process of step S16 and step S17 by 3rd Embodiment, when performing the process of step S9 and step S10 by 2nd Embodiment. Thereby, the control apparatus 40 can control appropriately the opening degree of the three-way valve 34 and the opening degree of the vane 23, respectively.
  • the control device 40 described above has a computer system inside.
  • the operation of each processing unit described above is stored in a computer-readable recording medium in the form of a program, and the above processing is performed by the computer reading and executing this program.
  • the computer-readable recording medium means a magnetic disk, a magneto-optical disk, a CD-ROM, a DVD-ROM, a semiconductor memory, or the like.
  • the computer program may be distributed to the computer via a communication line, and the computer that has received the distribution may execute the program.
  • the program may be for realizing a part of the functions described above. Furthermore, what can implement
  • the present invention includes a heat pump having a heat output heat exchanger that draws heat from a heat source system and outputs heat, a heating unit that heats water with the heat obtained from the heat output heat exchanger, and water heated by the heating unit An outflow part that causes the heating part to flow out, a circulation part that circulates water heated by the heating part to the upstream side of the heating part, an inflow part that causes water to flow from the heating object to the upstream side of the heating part, and A control device for controlling a hot water heating system comprising an adjustment unit that adjusts the flow distribution of water from the heating unit to the outflow unit and the circulation unit, and sets a target temperature of water upstream of the heating unit The upstream target temperature setting unit, and the adjustment so that the temperature of the water upstream of the heating unit increases by a predetermined temperature until the temperature of the water upstream of the heating unit reaches the target temperature.
  • the adjustment amount by the adjustment unit is set such that the temperature of the hot water upstream or downstream of the heating unit is increased by a predetermined temperature until the temperature of the hot water upstream of the heating unit reaches the target temperature.
  • the adjustment amount of the heat pump is determined. Thereby, the temperature increase rate in the transient state of the hot water system can be appropriately controlled.
  • Upstream target temperature setting unit 404 Heat pump information input unit 405 . Upstream side target Temperature setting unit 406 . Three-way valve control unit 407 ... Downstream side target temperature setting unit 408 . Downstream side temperature change rate calculation unit 409 ... Downstream side target temperature setting unit 410 ... Vane control Part

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  • 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)
PCT/JP2012/078995 2011-11-11 2012-11-08 温水加熱システム並びに制御装置及び制御方法 WO2013069734A1 (ja)

Priority Applications (3)

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EP12847838.5A EP2778555B1 (de) 2011-11-11 2012-11-08 Warmwasserheizungsanlage, steuerungsvorrichtung und steuerverfahren
KR1020147002043A KR101560511B1 (ko) 2011-11-11 2012-11-08 온수 가열 시스템 및 제어 장치 및 제어 방법
CN201280036536.8A CN103703323B (zh) 2011-11-11 2012-11-08 温水加热系统以及控制装置及控制方法

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JP2011-248030 2011-11-11
JP2011248030A JP5536013B2 (ja) 2011-11-11 2011-11-11 温水加熱システム並びに制御装置及び制御方法

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WO2016190232A1 (ja) * 2015-05-22 2016-12-01 ダイキン工業株式会社 温度調整用流体供給装置

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JPH01179835A (ja) * 1987-12-29 1989-07-17 Toto Ltd 湯水混合装置
JP2002340400A (ja) 2001-05-18 2002-11-27 Matsushita Electric Ind Co Ltd ヒートポンプ給湯機
JP2003240344A (ja) * 2002-02-19 2003-08-27 Matsushita Electric Ind Co Ltd ヒートポンプ給湯装置
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CN103528188B (zh) * 2013-11-04 2016-09-21 Tcl空调器(中山)有限公司 空气源热水机系统及其控制方法

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EP2778555A4 (de) 2016-01-06
EP2778555A1 (de) 2014-09-17
KR20140026635A (ko) 2014-03-05
JP5536013B2 (ja) 2014-07-02
JP2013104601A (ja) 2013-05-30
EP2778555B1 (de) 2018-10-17
CN103703323A (zh) 2014-04-02
CN103703323B (zh) 2016-06-08
KR101560511B1 (ko) 2015-10-14

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