EP2511618B1 - Système et procédé de conditionnement d'air - Google Patents

Système et procédé de conditionnement d'air Download PDF

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Publication number
EP2511618B1
EP2511618B1 EP12002239.7A EP12002239A EP2511618B1 EP 2511618 B1 EP2511618 B1 EP 2511618B1 EP 12002239 A EP12002239 A EP 12002239A EP 2511618 B1 EP2511618 B1 EP 2511618B1
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EP
European Patent Office
Prior art keywords
temperature
fluid
room
amount
air conditioning
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EP12002239.7A
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German (de)
English (en)
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EP2511618A2 (fr
EP2511618A3 (fr
Inventor
Masato Yosomiya
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Publication of EP2511618A3 publication Critical patent/EP2511618A3/fr
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0089—Systems using radiation from walls or panels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2120/00—Control inputs relating to users or occupants
    • F24F2120/10—Occupancy

Definitions

  • the present invention relates to an air conditioning system and an air conditioning method. More specifically, the present invention relates to energy-saving control in a central air conditioning system based on radiation air conditioning.
  • radiation air conditioning creates no feeling of air flow and provides higher comfort. For that reason, the radiation air conditioning using a radiator or the like is often employed in a heating facility mainly in a cold region or the like. Conventionally, a heating facility using hot water boiled by a boiler has been generally employed.
  • Patent Literature 1 to 5 A control method using a human detection sensor, which may lead to energy saving, has been widespread in an air conditioning system (refer to Patent Literature 1 to 5, for example).
  • JP2008045812A relates to a heat-storage heater comprising a human sensor detecting the presence or absence of a person staying in a room, a presence mode where the person stays in the room and an absence mode where the person does not stay in the room are switched and set on the basis of the detection information by the human sensor, and a blower fan is driven and controlled on the basis of the presence room temperature information or the absence room temperature information in the mode and the room temperature information detected by a room temperature detecting sensor, thus the presence mode and the absence mode capable of variably setting forcible radiation amount of the heat stored in the heat storing element, are switched and set.
  • JP H07 158927A relates to an air-conditioner capable of accurately predicting the activity of human bodies in a room over a period of the future, automatically operating in a suitable condition.
  • a calendar/watch unit is provided in the air conditioner, which outputs data on a date and time.
  • Human bodies in a room are detected by a human body sensor.
  • Light of lighting fixtures in the room is detected by an optical sensor, and the weather is detected by a weather sensor.
  • the outputs from the optical sensor and from the weather sensor are picked up at a necessary tiem based on the output from the human body sensor or the output from the calendar/watch unit.
  • Users' activity ranging over the future is predicted on the basis of the picked-up data, the output from the calendar/watch unit and the output from the human body sensor, and the operation of an air-conditioner is controlled according to this predicted result.
  • the radiation air conditioning provides higher comfort than the convection air conditioning, the radiation air conditioning produces no air flow. For that reason, it takes time to warm an entire room. It is a common practice to use the radiation air conditioning in such a manner that air conditioning operation is constantly performed as central air conditioning or the like to keep a room temperature to be constant.
  • an air conditioner is used in an ordinary house, for example.
  • weekday daytime very few people are in the house, so that the number of rooms in use is limited. Accordingly, when central air conditioning is performed, excessive heating capacity is used.
  • rooms in use during the weekday daytime are limited spaces, such as a living room and a kitchen.
  • a bedroom, a child room, or the like is a room usually not in use during the weekday daytime.
  • a room-use pattern on a holiday is supposed to differ from that on a weekday.
  • the presence-in-room rate of a room on the holiday is supposed to be higher than that on the weekday.
  • Excessive heating on the holiday is supposed to be reduced from that on the weekday.
  • the radiation air conditioning produces no air flow, so that a comfortable heating operation can be performed.
  • an energy loss caused by central air conditioning occurs, and thus excessive energy is consumed.
  • the present invention aims at achieving energy saving while maintaining comfort of air conditioning, for example.
  • energy saving may be achieved while maintaining comfort of air conditioning.
  • Fig. 1 is a diagram showing a configuration example of an air conditioning system 10.
  • the air conditioning system 10 is installed in a building 1.
  • the air conditioning system 10 includes at least one room temperature sensor 11, at least one human detection sensor 12, at least one radiator 13, and at least one flow amount adjusting valve 14.
  • the air conditioning system 10 further includes a heat source unit 21 and a control apparatus 31.
  • a radiator 13 which is a load-side device
  • a room temperature sensor 11 and a human detection sensor 12 are mounted in a same room space 2.
  • a radiator 13, a room temperature sensor 11, and a human detection sensor 12 are installed in each of the plurality of spaces 2.
  • the radiator 13 is an example of a heat exchanger installed in a room.
  • a fluid (i.e., a heat medium) heated by the heat source unit 21 flows through the radiator 13.
  • the radiator 13 performs heat exchange between this fluid and air in the room, thereby warming an inside of the room.
  • the room temperature sensor 11 measures a temperature of the room.
  • the human detection sensor 12 detects a human body in the room.
  • the heat source unit 21 heats the fluid to be flown into the radiator 13.
  • a boiler may be employed as the heat source unit 21
  • a heat pump is employed as the heat source unit 21 in this embodiment in view of the environment. The heat pump heats the fluid by heat exchange between the fluid and a refrigerant circulating in the heat pump.
  • the heat source unit 21 includes a compressor 22 and an air heat exchanger 23 (or air heat exchangers 23). Though not shown, the heat source unit 21 further includes an expansion unit and a fluid heat exchanger. The compressor 22, the fluid heat exchanger, the air heat exchanger 23, and the expansion unit are sequentially connected to form a heat pump cycle.
  • the compressor 22 compresses and heats the refrigerant.
  • the fluid heat exchanger uses the refrigerant heated by the compressor 22 to heat the fluid to be flown into the radiator 13.
  • the expansion unit cools the refrigerant by expansion cooling.
  • the air heat exchanger 23 is an example of a heat exchanger different from the radiator 13. After the refrigerant has been cooled by the expansion unit, the air heat exchanger 23 recovers heat for the refrigerant from outside air.
  • a fan 24 is mounted on the air heat exchanger 23. When a rotational speed of the fan 24 increases, an amount of the outside air blown to the air heat exchanger 23 increases. Accordingly, the recovery amount of the heat (i.e., an amount of heating of the refrigerant) increases.
  • a refrigerant with a low global warming potential is used as the refrigerant that circulates in the heat pump, in view of the environment.
  • the refrigerant with a global warming potential of 1000 or less be used.
  • R32, HFO (Hydro-Fluoro-Olefin)-1234yf, hydrocarbon, or CO 2 may be used as the refrigerant that circulates in the heat pump.
  • a liquid e.g., just water
  • water mainly composed of water
  • an antifreeze solution mainly composed of ethylene glycol
  • the control apparatus 31 includes a human body detection unit 32, a room temperature detection unit 33, an operation device 34, a heat source control unit 35, a flow amount control unit 36, and a storage unit 37.
  • the human body detection unit 32 receives from the human detection sensor 12 a signal indicating whether or not a human body is detected by the human detection sensor 12, for each space 2.
  • the room temperature detection unit 33 receives from the room temperature sensor 11 a signal indicating a temperature measured by the room temperature sensor 11, for each space 2.
  • the heat source control unit 35 controls an amount of heating of the fluid by the heat source unit 21. Specifically, the heat source control unit 35 increases the rotational speed of the compressor 21 in the heat source unit 21 or the rotational speed of the fan 24, thereby increasing the amount of heating of the refrigerant in the heat pump and, as a result, increasing the amount of heating of the fluid by the heat source unit 21. Alternatively, the heat source control unit 35 reduces the rotational speed of the compressor 21 in the heat source unit 21 or the rotational speed of the fan 24, thereby reducing the amount of heating of the refrigerant in the heat pump and, as a result, reducing the amount of heating of the fluid by the heat source unit 21.
  • the flow amount control unit 36 controls an amount of flow of the fluid into the radiator 13. Specifically, the flow amount control unit 36 increases an opening degree of the flow amount adjusting valve 14, thereby increasing the amount of flow of the fluid into the radiator 13. Alternatively, the flow amount control unit 36 reduces the opening degree of the flow amount adjusting valve 14, thereby reducing the amount of flow of the fluid into the radiator 13.
  • the storage unit 37 is a memory, for example.
  • the storage unit 37 stores a first temperature set in advance for each space 2 and a second temperature set to be lower than the first temperature, for each space 2.
  • the operation device 34 is a processor, for example.
  • the operation device 34 controls the amount of heating of the fluid by the heat source unit 21 and the amount of flow of the fluid into the radiator 13, using the heat source control unit 35 and the flow amount control unit 36, based on the signal received by the human body detection unit 32 and the signal received by the room temperature detection unit 33. In this way, the operation device 34 adjusts a temperature of the room, for each space 2.
  • the operation device 34 controls at least one of the amount of heating of the fluid by the heat source unit 21 and the amount of flow of the fluid into the radiator 13 so that the temperature to be measured by the room temperature sensor 11 becomes the first temperature stored in the storage unit 37.
  • the amount of heating of the fluid by the heat source unit 21 is adjusted using the heat source control unit 35, a temperature of the building 1 as a whole can be collectively adjusted.
  • the amount of flow of the fluid into the radiator 13 is adjusted using the flow amount control unit 36, the temperature of each individual space 2 can be finely adjusted.
  • the operation device 34 first increases the amount of heating of the fluid by the heat source unit 21. Next, the operation device 34 determines whether the most recent temperature of each space 2 measured by the room temperature sensor 11 is higher or lower than the corresponding first temperature. The operation device 34 increases the amount of flow of the fluid into the radiator 13 in the space 2 whose temperature is still lower than the corresponding first temperature. On the other hand, the operation device 34 reduces the amount of flow of the fluid into the radiator 13 in the space 2 whose temperature has become higher than the corresponding first temperature.
  • the operation device 34 increases the amount of flow of the fluid into the radiator 13 in the space 2 whose temperature is lower than the corresponding first temperature. At this time, the operation device 34 does not need to increase the amount of heating of the fluid by the heat source unit 21.
  • the control operation of the operation device 34 as described above is an example.
  • the temperature of each space 2 may be adjusted by a different operation.
  • the operation device 34 controls at least one of the amount of heating of the fluid by the heat source unit 21 and the amount of flow of the fluid into the radiator 13 so that the temperature to be measured by the room temperature sensor 11 becomes the second temperature stored in the storage unit 37.
  • the control operation of the operation device 34 when no human body is detected by the human detection sensor 12 is similar to that when a human body is detected by the human detection sensor 12.
  • the operation device 34 just adjusts the temperature of each space 2 to be the second temperature lower than the first temperature in this case.
  • an increase in the amount of heating of the fluid by the heat source unit 21 is relatively low. Accordingly, when there is no person in a space 2, a consumption amount of energy can be kept lower than that when there is a person in the space 2. That is, while maintaining comfort by warming the entire building 1, excessive energy consumption can be avoided in the space 2 where there is no person, and thereby energy saving can be achieved.
  • the operation device 34 compares a room temperature detected by the room temperature sensor 11 with the set temperature, and performs control using the heat source control unit 35 and the flow amount control unit 36 to cause the room temperature to come close to the set temperature.
  • the operation device 34 controls the heat source unit 21 so that an amount of a heat source supply is increased.
  • the number of rotations of the compressor 22 may be increased or the number of rotations of the fan 24 mounted on the air heat exchanger 23 may be increased.
  • the operation device 34 controls the flow amount adjusting valve 14 mounted before the radiator 13 to a more closed state, thereby reducing an amount of flow of the heat medium into the radiator 13 to suppress heating capacity. In that case, the operation device 34 also sends a signal instructing to save the amount of the heat source supply, from the heat source control unit 35 to the heat source unit 21, so as to prevent heat source supply capacity of the heat source unit 21 from getting excessive.
  • the number of rotations of the compressor 22 may be reduced or the number of rotations of the fan 24 mounted on the air heat exchanger 23 may be reduced.
  • the operation device 34 when presence of a person in the room is not confirmed by the human detection sensor 12, the operation device 34 reduces an amount of flow of the heat medium into the radiator 13 using the flow amount adjusting valve 14. Together with that arrangement, the operation device 34 sends a signal indicating to save the amount of the heat source supply, from the heat source control unit 35, in order to maintain balance between the heat source supply capacity and capacity demanded on a load side. Execution of such control makes it possible to reduce an energy loss caused by excessive heating.
  • the operation device 34 controls the amount of flow by the flow amount adjusting valve 14 and the amount of the heat supplied by the heat source unit 21 to cause the room temperature to come close to the set temperature.
  • the air conditioning system 10 in this example includes in the room spaces a plurality of radiation type heat exchangers (e.g., the radiators 13), adjusting valves (e.g., the flow amount adjusting valves 14) each of which adjusts an amount of flow of the heat medium into a corresponding one of the plurality of radiation type heat exchangers, the room temperature sensors 11, and the human detection sensors 12 each of which can detect a human body in a corresponding space 2 for which a corresponding one of the plurality of radiation type heat exchangers performs air conditioning.
  • the air conditioning system 10 further includes the heat source unit 21 that generates a heat source and the control apparatus 31 that controls each device.
  • the control apparatus 31 controls the temperature of the room by adjusting the amount of flow of the heat medium into a corresponding one of the plurality of radiated heat exchangers.
  • the heat pump is employed as the heat source unit 21 that generates heat.
  • the compressor 22 used in the heat pump is of an inverter driven type. By adjusting the number of rotations of the compressor 22, a circulation amount of the refrigerant can be adjusted.
  • the fan 24 with adjustable number of rotations is mounted on the heat exchanger (e.g., the air heat exchanger 23). By adjusting the number of rotations of the fan 24, a temperature of the refrigerant can be adjusted.
  • the human detection sensors 12 In the radiation air conditioning system, by employing the human detection sensors 12, whether or not a person is present is detected. A normal heating operation is performed for the space 2 where a person continues to be present. Control is performed for the room where no person is present so that the temperature of the room becomes lower than the target temperature of the room for which air conditioning is being performed. In this way, excessive energy consumption can be suppressed. That is, according to this example, the human detection sensors 12 are provided in the radiation type central air conditioning system to detect whether or not a person is present. The temperature of each room can be thereby controlled so that excessive heating is reduced.
  • the heat exchanger (i.e., the radiator 13) installed in each room is a heating appliance.
  • This heat exchanger may be replaced with a cooling appliance.
  • the second temperature is set to be higher than the first temperature.
  • Fig. 2 is a diagram showing a configuration example of an air conditioning system 10 according to a second example.
  • the air conditioning system 10 is different from the air conditioning system 10 in the first example shown in Fig. 1 in that a forced convection generation unit 15 is provided for the radiator 13.
  • the forced convection generation unit 15 is a fan whose rotational speed is variable, for example, and generates forced convection.
  • the operation device 34 of the control apparatus 31 operates the forced convection generation unit 15 of the radiator 13 until a temperature to be measured by a room temperature sensor 11 becomes the first temperature stored in the storage unit 37. This may promptly increase the temperature of each space 2 to the first temperature.
  • the operation device 34 increases at least one of an amount of heating of the fluid by the heat source unit 21 and an amount of flow of the fluid into the radiator 13 in that space 2.
  • the operation device 34 starts the operation of the forced convection generation unit 15 of the radiator 13.
  • the operation device 34 monitors the temperature of that space 2 to be measured by the room temperature sensor 11.
  • the operation device 34 stops the operation of the forced convection generation unit 15 of the radiator 13.
  • the operation device 34 performs only a heating operation by radiation. In this way, a feeling of air flow can be reduced. Accordingly, comfort can be maintained.
  • the operation device 34 When no human body is detected by the human detection sensor 12, the operation device 34 operates in a similar manner to that in the first example.
  • the operation device 34 when presence of a person in a room is not confirmed by the human detection sensor 12, the operation device 34 performs control to reduce heating supply capacity. However, when presence of a person in the room is newly confirmed and then heating depending on radiation alone is performed, it takes time for the temperature of the room to reach the set temperature. Therefore, in this example, the operation device 34 generates forced convection only when needed, thereby causing the temperature of the room to quickly reach the set temperature. The operation device 34 switches to air conditioning by radiation alone again when the room temperature has reached the set temperature.
  • Fig. 3 is a diagram showing a control example of the radiator 13.
  • Fig. 3 compares a relationship between whether or not a person is present and a room temperature control pattern between the case of the radiator 13 not including the forced convection generation unit 15 and the case of the radiator 13 including the forced convection generation unit 15.
  • the control apparatus 31 stops supply of a heat medium to the radiator 13 (or reduces an amount of supply of the heat medium to the radiator 13), no air flow is produced. Thus, there will be a slight response delay in a change of the room temperature.
  • the radiator 13 not including the forced convection generation unit 15 when it is detected by the human detection sensor 12 that a person is present in the room to the contrary and then the control apparatus 31 starts supply of the heat medium to the radiator 13 (or increases the amount of supply of the heat medium to the radiator 13), the same applies, that is, there will be a delay in a rise of the room temperature.
  • the radiator 13 including the forced convection generation unit 15 when the control apparatus 31 starts supply of the heat medium to the radiator 13 (or increases the amount of supply of the heat medium to the radiator 13) and also generates forced convection by the forced convection generation unit 15, the room temperature rises sharply.
  • the heat medium is supplied to the radiator 13, and forced convection is also generated, in this example.
  • a delay in a rise of the room temperature caused by air conditioning depending on radiation alone can be reduced, and it is possible to make the room temperature quickly come close to the set temperature.
  • generation of forced convection is stopped, and heating by radiation that does not cause a feeling of air flow is continued.
  • the air conditioning system 10 in this example when a human body is detected by the human detection sensor 12, the air conditioning system 10 in this example generates forced convection using the forced convection generation unit 15 provided for the radiation type heat exchanger (e.g., the radiator 13). This may reduce a delay in room temperature control (i.e., a delay in room temperature adjustment time).
  • An air conditioning system 10 in this example has the same configuration as the air conditioning system 10 in the first example shown in Fig. 1 .
  • the storage unit 37 of the control apparatus 31 stores as the second temperature a temperature set in advance according to a rate at which a human body was detected by the human detection sensor 12 in the past, for each combination of each space 2 and each of time periods.
  • the second temperature for example, is set to be reduced in a stepwise pattern accordingly as the rate in a corresponding one of the time periods is lower (i.e., the lower the rate in the corresponding time period is, the lower the second temperature is set), for example.
  • the second temperature may be set to be reduced in a continuous pattern accordingly as the rate in the corresponding time period is lower.
  • the second temperature may be set to have a value obtained by multiplication of the rate in the corresponding time period by a predetermined factor.
  • the operation device 34 of the control apparatus 31 controls at least one of an amount of heating of the fluid by the heat source unit 21 and an amount of flow of the fluid into the radiator 13 so that a temperature to be measured by the room temperature sensor 11 becomes the second temperature stored in the storage unit 37 and corresponding to the combination of that space 2 and a current time period.
  • the operation device 34 when the above-mentioned rate (i.e., the rate at which a human body was detected in the space 2 by the human detection sensor 12 in the past) in the current time period is 100%, the operation device 34 performs special control. Specifically, the operation device 34 controls at least one of the amount of heating of the fluid by the heat source unit 21 and the amount of flow of the fluid into the radiator 13 so that the temperature to be measured by the room temperature sensor 11 becomes the first temperature corresponding to the combination of the space 2 and the current time period, even if no human body is detected in that space 2 by the human detection sensor 12.
  • the operation device 34 controls at least one of the amount of heating of the fluid by the heat source unit 21 and the amount of flow of the fluid into the radiator 13 so that the temperature to be measured by the room temperature sensor 11 becomes the first temperature corresponding to the combination of the space 2 and the current time period, even if no human body is detected in that space 2 by the human detection sensor 12.
  • the operation device 34 when the above-mentioned rate (i.e., the rate at which a human body was detected in the space 2 by the human detection sensor 12 in the past) in the current time period is 0%, the operation device 34 also performs special control. Specifically, the operation device 34 stops flow of the fluid into the radiator 13 in the space 2 if no human body is detected in that space 2 by the human detection sensor 12.
  • Fig. 4 is a diagram showing a setting example of the second temperature.
  • a human behavior pattern changes according to the day of the week.
  • the operation device 34 learns the behavior pattern of one week in the building 1, and controls a heating operation based on the behavior pattern.
  • the operation device 34 makes a judgment on whether or not a person is present in each room using the human detection sensor 12 mounted in each space 2.
  • the judgment on whether or not a person is present in each room is made by the human detection sensor 12 at given times. In this example, the judgment is made for each time period of six hours for the sake of simplicity, and a result of the judgment ("presence in room" in Fig. 4 ) is stored in the storage unit 37 for each combination of each space 2 and each time period. Assume that a person exits a room in the middle of a six-hour time period. When duration of his presence in the room is not less than three hours that corresponds to 50% of the six-hour time period, it is judged that a person is present in the room.
  • the first temperature (the temperature set when a person is present in the room) is set to 20°C for each space 2, and is stored in the storage unit 37.
  • the first temperature may be set to be different for each space 2. Also, the first temperature may be set to be different for each time period.
  • the operation device 34 evaluates a presence-in-room rate for each time period on both weekdays and weekends.
  • the presence-in-room rate is evaluated into four grades in the ascending order: judgment D (indicating the presence-in-room rate of 0%), judgment C (indicating the presence-in-room rate in the range from 1 to 30%), judgment B (indicating the presence-in-room rate in the range from 31 to 79%), and judgment A (indicating the presence-in-room rate in the range from 80 to 100%).
  • the result of the evaluation ("judgment" in Fig. 4 ) is stored in the storage unit 37 for each combination of each space 2 and each time period.
  • the operation device 34 sets the second temperature (the temperature set when no person is present in the room) according to the result of the evaluation of the presence-in-room rate, for each combination of each space 2 and each time period.
  • the second temperature is set to 20°C (i.e., the same temperature as the first temperature) when the result of the evaluation of the presence-in-room rate is the judgment A.
  • the second temperature is set to 18°C when the result of the evaluation of the presence-in-room rate is the judgment B.
  • the second temperature is set to 16°C when the result of the evaluation of the presence-in-room rate is the judgment C.
  • the second temperature is stored in the storage unit 37. The second temperature is not set when the result of the evaluation of the presence-in-room rate is the judgment D.
  • a person is in the room X from 0 to 6 o'clock, but no person is in the room X from 6 to 18 o'clock, and a person is in the room X from 18 to 0 o'clock.
  • This cycle is repeated from Monday to Friday, which are weekdays. That is, a state of a person being present in the room and a state of no person being present is cyclically repeated.
  • the presence-in-room rates from 18 o'clock to next day 6 o'clock are 100% from Monday to Friday. Accordingly, the presence-in-room rates in these time periods are evaluated to be the judgment A.
  • the presence-in-room rates from 6 to 18 o'clock are 0% from Monday to Friday.
  • the presence-in-room rates in these time periods are evaluated to be the judgment D. It is highly likely that a person is present in the room X in the time periods corresponding to the judgment A. Accordingly, a heating operation is continued with the set temperature being unchanged from the target temperature and kept at 20°C in these time periods, even if no person is present in the room X temporarily. On the other hand, a probability that a person is in the room X in the time periods corresponding to the judgment D is 0%. Accordingly, basically, the heating operation is not performed in these time periods, when no person is in the room X, and the room temperature is not specifically set.
  • the presence-in-room rate in this time period on the five weekdays is 60%, so that the presence-in-room rate in this time period on the five weekdays is evaluated to be the judgment B.
  • the presence-in-room rate from 6 to 12 o'clock is evaluated to be the judgment C.
  • the presence-in-room rate from 12 to 18 o'clock is evaluated to be the judgment D.
  • the presence-in-room rate from 18 to 0 o'clock is evaluated to be the judgment A.
  • a heating operation is performed at the set temperature of 18°C, which is slightly lower than the normal set temperature.
  • a heating operation is performed at the set temperature of 16°C, which is lower than 18°C.
  • the heating operation is performed at the temperature that is set according to a result of evaluation of the presence-in-room rate.
  • the heating operation is performed at the normal set temperature of 20°C.
  • the presence-in-room rates are separately evaluated on the weekdays (from Monday to Friday) and the holidays (Saturday and Sunday). Alternatively, the evaluation may be performed for each day of the week.
  • the heating system in which it takes time to follow a fluctuation of a load such as the radiator 13, performs the heating operation with changing the target set temperature according to the presence-in-room rate of a room as described above when no person is in the room. Therefore, according to this example, quantity of heat that may leak to an outside along a wall or due to ventilation can be reduced, so that an efficient heating operation can be performed. Further, deterioration of comfort that would occur when it takes a long time to follow a fluctuation of a load can be avoided as much as possible.

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Claims (12)

  1. Système de climatisation (3) comprenant :
    une unité source de chaleur (21) qui est configurée pour chauffer un fluide ;
    un échangeur de chaleur (13) configuré pour être installé dans une pièce, le fluide chauffé par l'unité source de chaleur circulant à travers l'échangeur de chaleur (13), l'échangeur de chaleur (13) étant configuré pour exécuter un échange de chaleur entre le fluide et l'air de la pièce ;
    un capteur de température de la pièce (11) qui est configuré pour mesurer la température de la pièce ;
    un capteur de détection humaine (12) qui est configuré pour détecter un corps humain dans la pièce ; et
    un appareil de commande (31) qui est configuré pour, quand un corps humain est détecté par le capteur de détection humaine (12), commander l'une au moins d'une quantité de chauffage du fluide par l'unité source de chaleur (21), et d'une quantité de circulation du fluide dans l'échangeur de chaleur (13), de telle sorte que la température mesurée par le capteur de température de la pièce (11) atteigne une première température réglée à l'avance, qui est configuré pour évaluer la vitesse à laquelle un corps humain a été détecté par le capteur de détection humaine (12) pendant une période de temps, pendant un jour d'une semaine et selon le type de jour de la semaine, et comprend une unité de stockage (37) qui est configurée pour stocker la vitesse pour une pluralité de périodes de temps, et pour stocker, en tant que seconde température, une température réglée à l'avance selon la vitesse à laquelle un corps humain a été détecté dans le passé par le capteur de détection humaine (12), pour chacune des périodes de temps, dans lequel la seconde température est réglée en outre pour être inférieure à la première température, et être réduite en conséquence lorsque la vitesse au cours de l'une correspondante des périodes de temps, est inférieure, et, dans lequel l'appareil de commande (31) est configuré pour, quand aucun corps humain n'est détecté par le détecteur de détection humaine (12), commander l'une au moins de la quantité de chauffage du fluide par l'unité source de chaleur (21), et de la quantité de circulation du fluide dans l'échangeur de chaleur (13), de telle sorte que la température mesurée par le capteur de température de la pièce (11) atteigne la seconde température stockée dans l'unité de stockage (37), et correspondant à une période de temps actuelle correspondant à l'une des périodes de temps.
  2. Système de climatisation selon la revendication 1, dans lequel l'unité de stockage (37) de l'appareil de commande (31) est configurée pour stocker, en tant que seconde température, une température réglée pour être réduite selon un motif par paliers lorsque la vitesse dans l'une correspondante des périodes de temps est plus basse.
  3. Système de climatisation selon la revendication 1 ou 2, dans lequel l'appareil de commande est configuré pour, quand aucun corps humain n'est détecté par le capteur de détection humaine (12) et lorsque la vitesse au cours de la période de temps actuelle correspondant à l'une des périodes de temps est égale à 100 %, commander l'une au moins de la quantité de chauffage du fluide par l'unité source de chaleur, et de la quantité de circulation du fluide dans l'échangeur de chaleur (13), de telle sorte que la température mesurée par le capteur de température de la pièce (11) atteigne la première température.
  4. Système de climatisation selon l'une quelconque des revendication 1 à 3, dans lequel l'appareil de commande est configuré pour, quand aucun corps humain n'est détecté par le capteur de détection humaine (12) et lorsque la vitesse au cours de la période de temps actuelle correspondant à l'une des périodes de temps est égale à 0 %, arrêter l'écoulement du fluide dans l'échangeur de chaleur.
  5. Système de climatisation selon l'une quelconque des revendication 1 à 4, dans lequel
    l'échangeur de chaleur (13) est configuré pour être installé dans chacune d'une pluralité de pièces,
    l'unité de stockage (37) de l'appareil de commande (31) est configurée pour stocker la température réglée à l'avance selon la vitesse à laquelle un corps humain a été détecté dans le passé par le capteur de détection humaine (12), pour chaque combinaison de chacune des périodes de temps et de chacune de la pluralité de pièces, et,
    pour chacune de la pluralité de pièces, quand un corps humain est détecté par le capteur de détection humaine (12), l'appareil de commande est configuré pour commander l'une au moins de la quantité de chauffage du fluide par l'unité source de chaleur (21), et de la quantité de circulation du fluide dans l'échangeur de chaleur (13), de telle sorte que la température mesurée par le capteur de température de la pièce (11) atteigne la première température, et, quand aucun corps humain n'est détecté par le capteur de détection humaine (12), l'appareil de commande (31) commande l'une au moins de la quantité de chauffage du fluide par l'unité source de chaleur (21), et de la quantité de circulation du fluide dans l'échangeur de chaleur (13), de telle sorte que la température mesurée par le capteur de température de la pièce (11) atteigne la seconde température stockée dans l'unité de stockage (37), et correspondant à la période de temps actuelle correspondant à l'une des périodes de temps.
  6. Système de climatisation selon l'une quelconque des revendication 1 à 5, dans lequel
    l'échangeur de chaleur (13) comprend une unité de génération de convection forcée (15) qui est configurée pour générer une convection forcée, et,
    quand un corps humain est détecté par le capteur de détection humaine (12), l'appareil de commande (37) est configuré pour actionner l'unité de génération de convection forcée (15) de l'échangeur de chaleur (13), jusqu'à ce que la température mesurée par le capteur de température de la pièce (11) atteigne la première température.
  7. Système de climatisation selon l'une quelconque des revendication 1 à 6, dans lequel le fluide se compose principalement d'eau ou d'éthylène glycol.
  8. Système de climatisation selon l'une quelconque des revendication 1 à 7, dans lequel
    l'unité source de chaleur (21) est une pompe à chaleur qui comprend un compresseur (22) qui est configuré pour comprimer un fluide frigorigène, la pompe à chaleur étant configurée pour chauffer le fluide par un échange de chaleur entre le fluide frigorigène et le fluide, et
    l'appareil de commande (31) est configuré pour commander la quantité de chauffage du fluide par l'unité source de chaleur (21), en réglant la vitesse de rotation du compresseur (22).
  9. Système de climatisation selon l'une quelconque des revendication 1 à 7, dans lequel
    l'unité source de chaleur (21) est une pompe à chaleur qui comprend un échangeur de chaleur différent (23) qui est configuré pour chauffer un fluide frigorigène avec l'air soufflé par une soufflante (24), la pompe à chaleur étant configurée pour chauffer le fluide par un échange de chaleur entre le fluide frigorigène et le fluide, et
    l'appareil de commande (31) est configuré pour commander la quantité de chauffage du fluide par l'unité source de chaleur (21), en réglant la vitesse de rotation de la soufflante (24).
  10. Système de climatisation selon la revendication 8 ou 9, dans lequel
    le fluide frigorigène présente un potentiel de réchauffement climatique égal ou inférieur à 1000.
  11. Système de climatisation selon l'une quelconque des revendication 8 à 10, dans lequel
    le fluide frigorigène est l'un de R32, HFO (hydrofluoroléfine)-1234yf, d'hydrocarbure, et de CO2 (dioxyde de carbone).
  12. Procédé de climatisation comprenant les étapes suivantes :
    chauffer un fluide avec une unité source de chaleur (21) ;
    exécuter un échange de chaleur entre le fluide chauffé par l'unité source de chaleur, et l'air d'une pièce, avec un échangeur de chaleur (13) installé dans la pièce ;
    mesurer la température de la pièce avec un capteur de température de la pièce (11) ;
    détecter un corps humain dans la pièce avec un capteur de détection humaine (12) ;
    commander avec l'appareil de commande (31), quand un corps humain est détecté par le capteur de détection humaine (12), l'une au moins d'une quantité de chauffage du fluide par l'unité source de chaleur, et d'une quantité de circulation du fluide dans l'échangeur de chaleur, de telle sorte que la température mesurée par le capteur de température de la pièce (11) atteigne une première température réglée à l'avance, et commander avec l'appareil de commande,
    évaluer avec l'appareil de commande (31), la vitesse à laquelle un corps humain a été détecté par le capteur de détection humaine (12), pendant une période de temps, pendant un jour d'une semaine et selon le type de jour de la semaine ;
    stocker dans une unité de stockage (37) de l'appareil de commande (31), la vitesse pour une pluralité de périodes de temps ;
    stocker dans une unité de stockage (37) de l'appareil de commande (31), en tant que seconde température, une température réglée à l'avance selon la vitesse à laquelle un corps humain a été détecté dans le passé par le capteur de détection humaine (12), pour chaque période de temps, dans lequel la seconde température est réglée en outre pour être inférieure à la première température, et être réduite en conséquence lorsque la vitesse au cours de l'une correspondante des périodes de temps est inférieure, et commander avec l'appareil de commande (31), quand aucun corps humain n'est détecté par le capteur de détection humaine (12), l'une au moins de la quantité de chauffage du fluide par l'unité source de chaleur (21), et de la quantité de circulation du fluide dans l'échangeur de chaleur (13), de telle sorte que la température mesurée par le capteur de température de la pièce (11) atteigne la seconde température stockée dans l'unité de stockage (37), et correspondant à une période de temps actuelle correspondant à l'une des périodes de temps.
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JP5538289B2 (ja) 2014-07-02
EP2511618A3 (fr) 2018-04-11

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