US20110011943A1 - Heating installation and method for controlling the heating installation - Google Patents

Heating installation and method for controlling the heating installation Download PDF

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Publication number
US20110011943A1
US20110011943A1 US12/922,709 US92270909A US2011011943A1 US 20110011943 A1 US20110011943 A1 US 20110011943A1 US 92270909 A US92270909 A US 92270909A US 2011011943 A1 US2011011943 A1 US 2011011943A1
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United States
Prior art keywords
temperature
heat
demand
heating
actual
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US12/922,709
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English (en)
Inventor
Bart Aspeslagh
Hiroki Ochi
Hidehiko Kataoka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daikin Europe NV
Daikin Industries Ltd
Original Assignee
Daikin Europe NV
Daikin Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Daikin Europe NV, Daikin Industries Ltd filed Critical Daikin Europe NV
Assigned to DAIKIN INDUSTRIES, LTD., DAIKIN EUROPE N.V. reassignment DAIKIN INDUSTRIES, LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KATAOKA, HIDEHIKO, ASPESLAGH, BART, OCHI, HIROKI
Publication of US20110011943A1 publication Critical patent/US20110011943A1/en
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D3/00—Hot-water central heating systems
    • F24D3/18—Hot-water central heating systems using heat pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • 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
    • 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
    • F24H15/212—Temperature of the water
    • F24H15/223—Temperature of the water in the water storage tank
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/305—Control of valves
    • F24H15/32—Control of valves of switching valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/375—Control of heat pumps
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/12—Hot water central heating systems using heat pumps

Definitions

  • the present invention relates to a heating installation and a method for controlling the heating installation. It is, however, to be understood that the present invention may also be incorporated in combined heating and cooling installations and is then implemented for controlling the installation in the heating mode. More particularly, the present invention relates to a heating installation comprising a heat pump, particularly an air-source heat pump, having an outdoor evaporator, a compressor, a condenser and an expansion means connected by a refrigerant piping in a cycle; a heating fluid piping passing through the condenser for exchanging a heat between the refrigerant and the heating fluid and at least a first and a second object to be heated by the heating fluid to a first set temperature and a second set temperature.
  • a heat pump particularly an air-source heat pump, having an outdoor evaporator, a compressor, a condenser and an expansion means connected by a refrigerant piping in a cycle
  • a heating fluid piping passing through the condenser for exchanging a heat between the
  • the priority is set to the domestic hot water production, there is a possibility that the indoor temperature is dropping below the level of comfort. In case the priority is set to the space room heating, there may occur discomfort in the domestic hot water production if an insufficient hot water production takes place.
  • the principle idea of the present invention is to provide the heating installation with an adaptive control which controls the supply of heating fluid to a first and second object to be heated based on a comparison of the heating demand of the first and second object.
  • the present invention considers both heating demands of the objects to be heated compares the demands and based on the comparison decides which of the first and second object is to be served first, i.e. supplied with heating fluid.
  • the heating installation of the present invention comprises a heat pump having an evaporator, a compressor, a condenser and a expansion means connected by a refrigerant piping in a cycle. It is to be understood that the heat pump in a combined heating and cooling installation may also be operated in a cooling mode, that is reversed compared to the heating mode. In the cooling mode, the evaporator will then serve the condenser and the condenser will serve as the evaporator of the heat pump.
  • the heating installation of the present invention comprises a heating fluid piping passing through the condenser for exchanging heat between the refrigerant and the heating fluid as well as at least a first and a second object to be heated by the heating fluid to a fist set temperature and a second set temperature, respectively.
  • the heating installation of the present invention comprises a valve which is at least switchable between a first position for supplying heating fluid to heat the first object and a second position for supplying heating fluid to heat the second object.
  • at least two sensors are provided for detecting the first and the second actual temperature at the first and the second object, respectively.
  • the control of the heating installation of the present invention is configured to, in a demand dependent mode, determine a first demand based on at least the first set temperature and the first actual temperature and a second demand based on at least the second set temperature and the second actual temperature and based on the first and second demand switches the valve to the first and the second position to either serve the first object or the second object, hence, satisfying the first or the second demand (heating demand).
  • the first demand is determined based on at least the first set temperature and the first actual temperature but other parameters may also be considered in determining the demands, such as time and temperature concurrent. If these parameters other than the said temperatures are sufficiently significant, the demand may also be determined based on these parameters only. Further, the first demand and the second demand may be determined based on at least the difference between the set temperature and the actual temperature.
  • control is configured to switch the valve to the first position if the first demand is higher than the second demand and to switch the valve to the second position if the second demand is higher than the first demand.
  • control is configured to switch the valve to the first position, if there is no second demand and to switch the valve into the second position, if there is no first demand. Nevertheless, even if there are a first demand and a second demand and according to this preferred embodiment, the control switches the valve so as to serve the higher demand.
  • the first object is at least one heat emitter which is arranged in a room to be heated, wherein the heat emitter on an upstream side thereof is connected to the heating fluid piping via said valve.
  • the heat emitter comprises a floor heating loops or may entirely consist of a floor heating loops.
  • radiators and floor heating loops may form the heat emitter of the present invention.
  • the first actual temperature is the actual flow temperature to the heat emitter, i.e. the flow temperature of the heating fluid to the heat emitter and the first set temperature is the desired flow temperature to the heat emitter, which may be required to obtain the desired room temperature.
  • the second object is water contained in a hot water container.
  • a portion of a pipe the upstream side of which being connected to the heating fluid piping via said valve, is connected to a heat exchanger for transferring the heat from the heating fluid to the water.
  • the portion of the pipe forms the heat exchanger and passes, e.g. in form of a coil, through the interior of the hot water container, thereby transferring the heat from the heating fluid to the water.
  • the second actual temperature is the actual water temperature of the water contained in the hot water container and to be heated and the second set temperature is the desired temperature of said water.
  • control has an input device for selecting the mode, wherein in the priority mode a priority is manually set with respect to the first or the second object.
  • the input device may also comprise an input element, such as a bottom, for selecting a boosting mode, in which an additional heater in the hot water container is manually activated to quickly heat up the water in the container if required.
  • the present invention also provides a method for controlling a heating installation as described above.
  • the control method comprises the steps of calculating a first demand based on at least the first set temperature and the first actual temperature and a second demand based on at least the second set temperature and the second actual temperature, comparing the first and second demand and heating either the first object or the second object based on the comparison, that is to either supply heating fluid to the first, object or to the second object.
  • FIG. 1 is a perspective view of a room heating and cooling installation in which the present invention may be implemented
  • FIG. 2 is a system diagram for schematically explaining the components of the installation shown in FIG. 1 ;
  • the present application will be described in the following as being implemented in an installation which is capable of heating and cooling a predetermined space (room) and heating water in a hot water container, the water via piping 50 being used for sanitary purposes like the tabs 52 , the shower 51 , etc. (see FIG. 1 ). Yet it is to be understood that the present invention may also be implemented in other installation than the one shown in FIGS. 1 and 2 , where appropriate.
  • the installation shown in FIG. 1 consists of three major components, an outdoor unit 10 , an indoor unit 20 and a hot water container 30 .
  • the outdoor unit 10 is connected to a piping 11 , 12 which connects the outdoor unit 10 to the indoor unit 20 .
  • the outdoor unit 10 comprises an inlet/outlet 12 and an outlet/inlet 11 for a refrigerant piping.
  • the indoor unit 20 comprises an inlet/outlet 24 and an outlet/inlet 23 for the refrigerant piping.
  • the indoor unit has an outlet 21 and an inlet 22 for the fluid to be circulated in the fluid circuit (depending on the mode the fluid is heating or cooling fluid).
  • the fluid may be water or a brine solution.
  • the piping downstream of the outlet 21 is connected via a valve 32 to a piping 31 and a piping 35 .
  • the piping 31 passes through the interior of the hot water container 30 in form of a coil (see FIG. 1 ) and leaves the hot water container 30 via a piping 34 connected to a piping 36 leading to the inlet 22 .
  • the piping 35 downstream of the valve 32 leads to a heat emitter 41 and/or underfloor heating loops 40 and then is refed to the indoor unit via the piping 36 and the inlet 22 .
  • connections 11 , 12 to the outdoor unit 10 and the connections 23 , 24 to the indoor unit may respectively be reversed depending on the mode in which the system is operated, i.e. the heating mode or the cooling mode.
  • the outdoor unit comprises an evaporator and/or condenser 14 , a four-way valve 16 , a compressor 15 and an expansion device 13 , which is may be an electric valve or a capillary.
  • the indoor unit 20 inter alia comprises a condenser/evaporator 25 .
  • These components form a heat pump.
  • the evaporator/condenser 14 , the compressor 15 , the condenser/evaporator 25 and the expansion device (means) 13 are connected in this order in a cycle or loop by means of a refrigerant piping 17 , 18 .
  • a refrigerant is circulated by means of the compressor 15 in the refrigerant piping 17 , 18 .
  • the refrigerant circulates clockwise in FIG. 2 .
  • the refrigerant leaving the condenser 25 and having a first temperature Ti upstream of the expansion device (means) 13 passes the expansion device (means) 13 , the pressure being reduced.
  • the refrigerant passes the evaporator 14 and is evaporated having a second temperature T 2 downstream of the evaporator 14 higher than the first temperature.
  • the refrigerant passes through the compressor, the pressure being increased.
  • the refrigerant is again condensed to the first temperature Ti in the condenser 25 , wherein the heat from the refrigerant is transferred to the water or brine solution (fluid) in the piping connected to the indoor unit via the connections (inlet 22 and outlet 21 .
  • the indoor unit 20 further comprises a pump 27 and a backup heater 26 .
  • the pump serves for circulating the fluid (heating or cooling fluid) in the fluid circuit ( 21 , 31 , 34 , 35 , 36 , 22 ).
  • the purpose of the backup heater 26 is to cope with situations in which the heat pump described above is not capable to satisfy the entire heating demand (at very low temperatures, e.g. below ⁇ 10 degrees Celsius). This backup heater 26 in some cases may also be omitted.
  • the fluid enters the indoor unit 20 through the inlet 22 , passes the condenser 25 , wherein heat is transferred from the refrigerant to the fluid, then flows through the backup heater 26 in which the fluid may be additionally heated if necessary and subsequently passes the pump 27 which circulates the fluid in the fluid circuit. Afterwards and by controlling the valve 32 the fluid is either supplied to the floor heating loops 40 and the heat emitter 41 (see FIG. 1 ) or alternatively to the hot water container piping ( 31 , 34 ).
  • the fluid may enter the hot water container 30 by means of the piping 31 passing the heating coil inside the hot water container 30 thereby transferring the heat from the fluid to the water contained in the hot water container 30 and subsequently being reefed to the circuit by the pipings 34 and 36 finally being reintroduced into the indoor unit via the inlet 22 .
  • the fluid may also be supplied to the floor heating loops 40 as a heat emitter or the radiator 41 shown in FIG. 1 and subsequently be reintroduced in to the indoor unit via the inlet 22 .
  • an additional (booster) heater 33 may be provided in the hot water container.
  • the system comprises a temperature sensor 60 which detects the temperature of the heating fluid leaving the indoor unit which, in the following, is considered as the actual flow temperature of the heating fluid.
  • An additional temperature sensor 63 is provided to detect the temperature of the hot water in the hot water container 30 .
  • An input device (not shown) which in general will be arranged in or on the indoor unit is used to input a desired flow temperature (first set temperature) of the heating fluid to the heat emitters 40 , 41 and the desired water temperature in the hot water container 30 (second set temperature).
  • the flow temperature may also be adapted automatically based on the outdoor temperature (ambient temperature) and/or the room temperature in the room to be heated. That is, if the outdoor temperature decreases the flow temperature is increased and vice versa and/or if the low temperature is too high for the room to be heated resulting in a high cycling rate between supply and nonsupply of heating fluid to the heat emitter the flow temperature is decreased and vice versa.
  • control via the sensors 60 , 63 detects the flow temperature of the heating fluid leaving the indoor unit
  • the temperature of the hot water in the hot water container 30 as a second actual temperature.
  • the control determines a first demand of the heat emitters 40 , 41 and a second demand of the hot water container 30 .
  • This calculation or determination may include the difference between the first set and the first actual temperature and the difference between the second set and actual temperature. Also other parameters such as may influence the result of the first and the second demand. These parameters may be selected from the group of field settings which can be selected by the installer.
  • the control compares the first and the second demand and depending on which demand is higher serves the heat emitters 40 , 41 or the hot water container 30 . I.e. if the first demand is higher, the valve 32 switches to the first position supplying heating fluid to the heat emitters 40 , 41 via the piping 35 .
  • the valve 32 switches to the second position supplying heating fluid via the piping 31 to the hot water container 30 passing the heating coil inside the hot water container 30 being refed via the piping 32 and 36 to the indoor unit, whereby the hot water in the hot water container 30 is heated by transfer of heat from the heating fluid flowing through the heating coil to the water in the container.
  • the control changes from the above described demand dependent mode to a priority mode, wherein the user has to set a priority, either for heating the rooms, i.e. supplying heating fluid to the heat emitters 40 , 41 or the hot water in the hot water container 30 , i.e. supplying heating fluid to the hot water container 30 .
  • the system may comprise a button to select a “boosting mode” which enables to activate the additional heater 33 in the hot water container 30 to quickly heat up the water in the hot water container to quickly obtain the desired temperature (second set temperature).
  • This additional heater 33 may also be activated by means of the control in the demand dependent mode if the first demand is higher than the second demand and the heating fluid is supplied to the heat emitters 40 , 41 rather than to the hot water container 30 so as to concurrently obtain the desired water temperature in the hot water container 30 if the actual temperature measured by the sensor 63 drops below a predetermined value lower than the desired temperature of the hot water in the container (second set temperature).
  • the present invention has been described with respect to a combined heating and cooling installation, the present invention may also be applied to a heating installation without the cooling capability.
  • the present invention has been described with respect to heat emitters 40 , 41 and a hot water container 30 as first and second object. It is, however, to be understood that the present invention may also be implemented to heat other objects than the above described.

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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)
  • Steam Or Hot-Water Central Heating Systems (AREA)
US12/922,709 2008-03-20 2009-03-19 Heating installation and method for controlling the heating installation Abandoned US20110011943A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP08005301.0 2008-03-20
EP08005301A EP2103880B1 (fr) 2008-03-20 2008-03-20 Dispositif de chauffage et procédé de contrôle du chauffage
PCT/JP2009/001234 WO2009116294A1 (fr) 2008-03-20 2009-03-19 Chauffage et procédé de commande du chauffage

Publications (1)

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US20110011943A1 true US20110011943A1 (en) 2011-01-20

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US12/922,709 Abandoned US20110011943A1 (en) 2008-03-20 2009-03-19 Heating installation and method for controlling the heating installation

Country Status (7)

Country Link
US (1) US20110011943A1 (fr)
EP (1) EP2103880B1 (fr)
KR (1) KR101252786B1 (fr)
CN (1) CN101970941B (fr)
AT (1) ATE523738T1 (fr)
AU (1) AU2009227388B8 (fr)
WO (1) WO2009116294A1 (fr)

Cited By (4)

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US20120043390A1 (en) * 2010-08-17 2012-02-23 Jinhee Noh Heat pump
US20150034730A1 (en) * 2013-08-02 2015-02-05 Mitsubishi Electric Corporation Heating and hot water supply system
US20180187927A1 (en) * 2017-01-03 2018-07-05 Heatcraft Refrigeration Products Llc System and method for reusing waste heat of a transcritical refrigeration system
WO2019047003A1 (fr) * 2017-09-05 2019-03-14 江苏天舒电器股份有限公司 Procédé de commande dynamique pour système d'eau de pompe de chauffage

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Publication number Priority date Publication date Assignee Title
CN113883589A (zh) * 2021-10-20 2022-01-04 珠海格力电器股份有限公司 供暖控制方法、装置及壁挂炉系统

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Cited By (6)

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Publication number Priority date Publication date Assignee Title
US20120043390A1 (en) * 2010-08-17 2012-02-23 Jinhee Noh Heat pump
US9316402B2 (en) * 2010-08-17 2016-04-19 Lg Electronics Inc. Heat pump
US20150034730A1 (en) * 2013-08-02 2015-02-05 Mitsubishi Electric Corporation Heating and hot water supply system
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AU2009227388A1 (en) 2009-09-24
KR101252786B1 (ko) 2013-04-09
KR20100139051A (ko) 2010-12-31
AU2009227388B8 (en) 2012-03-22
CN101970941B (zh) 2013-08-07
AU2009227388B2 (en) 2012-03-01
EP2103880B1 (fr) 2011-09-07
EP2103880A1 (fr) 2009-09-23
ATE523738T1 (de) 2011-09-15
CN101970941A (zh) 2011-02-09
WO2009116294A1 (fr) 2009-09-24

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