AIR-CONDITIONING CONTROL SYSTEM

• US 20100307731A1
• Filed: 01/26/2009
• Published: 12/09/2010
• Est. Priority Date: 01/28/2008
• Status: Abandoned Application

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Hanada, Yuuichi, Makino, Naoki, Takagi, Yasuo, Nishimura, Nobutaka, Morimoto, Hiroshi, Yonezawa, Kenzo
• Application Number:
  US12/864,680
• Publication Number:
  US 20100307731A1
• Time in Patent Office: Days
• US Class Current: 165/223
• CPC Class Codes: F24F 11/30 for purposes related to the operation of the system, e.g. for safety or monitoring
• CPC Class Codes: F24F 11/46 Improving electric energy efficiency or saving
• CPC Class Codes: F24F 11/62 characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
• CPC Class Codes: F24F 11/64 using pre-stored data
• CPC Class Codes: F24F 11/77 by controlling the speed of ventilators
• CPC Class Codes: F24F 11/89 Arrangement or mounting of control or safety devices
• CPC Class Codes: F24F 2110/00 Control inputs relating to air properties
• CPC Class Codes: F24F 2110/10 Temperature
• CPC Class Codes: F24F 2110/20 Humidity
• CPC Class Codes: F24F 2110/70 Carbon dioxide
• CPC Class Codes: F24F 3/06 characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units
• CPC Class Codes: Y02B 30/70 Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

An air-conditioning control system (1) includes: an air conditioner (10) having an outer air cooling coil (11) for cooling outer air and a return air cooling coil (12) for cooling return air in a room; a central heat source device (40) for supplying cold water to each coil (11, 12) of the air conditioner (10); and an air-conditioning linkage controller (50) for calculating a set value of the air conditioner (10) so that the total necessary consumption energy in the air-conditioning control system (1) is the minimum value within a preset range of a comfort index.

Claims

1. An air-conditioning control system, comprising:

an air conditioner;

a central heat source device;

an air-conditioning controller for controlling operations the air conditioner and the central heat source device; and

a measurement device provided for a room or control zones divided in the room subject to an air-conditioning control, the measurement device for measuring temperature and humidity subject to the air-conditioning control,

the air conditioner, the central heat source device, the air-conditioning controller, and the measurement device being connected, wherein the measurement device comprises a measured value transmitter for obtaining a temperature measured value and a humidity measured value measured in the room or the control zones in the room subject to the air-conditioning control, so as to send the obtained values to the air-conditioning controller;

the air conditioner comprises;

an outer air coil for introducing a certain amount of outer air, the outer air coil for controlling temperature and humidity of the introduced outer air based on a temperature set value and a humidity set value obtained from the air-conditioning controller;

a return air coil for introducing a certain amount of return air from the room or the control zones in the room subject to the air-conditioning control, the return air coil for controlling temperature of the introduced return air based on the temperature set value obtained from the air-conditioning controller; and

a blast fan for producing a mixed air of the outer air of which the temperature and humidity are controlled by the outer air cooling coil and the return air of which the temperature is controlled by the return air cooling coil, the blast fan for supplying the mixed air to the room or the control zones in the room subject to the air-conditioning control,

the central heat source device comprises;

a cold/hot water controller comprising a refrigerator and a cooling tower, the cold/hot water controller for controlling a water temperature based on a water temperature set value obtained from the air-conditioning controller, thereby generating cold water or hot water to supply to the air conditioner; and

a water pump for supplying the cold water or the hot water generated in the cold/hot water controller to at least one of the outer air coil and the return air coil of the air conditioner based on a flow rate value obtained from the air-conditioning controller, and

the air-conditioning controller comprises;

a measured value obtaining unit for obtaining the temperature measured value and the humidity measured value sent from the measured value transmitter of the measurement device;

a comfort index range recorder for storing a preset target set range of a comfort index;

an air conditioner set value calculator for calculating a temperature set value and a humidity set value of air supplied from the air conditioner within the target set range of the comfort index stored in the comfort index range recorder based on the temperature measured value and the humidity measured value obtained in the measured value obtaining unit, so that a sum of consumption energies of the refrigerator, the cooling tower, the outer air coil, the return air coil, the water pump, and the blast fan is a minimum value;

a set value transmitter for sending the temperature set value and the humidity set value calculated in the air conditioner set value calculator to the air conditioner; and

a control value transmitter for calculating a water temperature set value and a flow rate value of the cold water or the hot water according to the temperature set value and the humidity set value calculated in the air conditioner set value calculator, so as to send the calculated values to the central heat source device.

2. The air-conditioning control system of claim 1, wherein

the central heat source device that is provided two systems, comprising:

a first central heat source device for supplying cold water or hot water to the outer air coil; and

a second central heat source device for supplying cold water or hot water to the return air coil.

4. The air-conditioning control system of claim 1 or 3, wherein

the air conditioner set value calculator of the air-conditioning controller calculates a airflow speed set value in addition to the temperature set value and the humidity set value,

the set value transmitter of the air-conditioning controller sends the airflow speed set value in addition to the temperature set value and the humidity set value to the air conditioner, and

the blast fan of the air conditioner supplies the mixed air to the room or the control zones in the room subject to the air-conditioning control based on the airflow speed set value obtained from the air-conditioning controller.

5. The air-conditioning control system of claim 1 or 3, wherein

the measurement device further measures a level of carbon dioxide in the room or the control zones in the room subject to the air-conditioning control,

the measured value transmitter of the measurement device further obtains a measured value of the level of carbon dioxide measured in the room or the control zones in the room subject to the air-conditioning control, so as to send the obtained value to the air-conditioning controller,

the measured value obtaining unit of the air-conditioning controller further obtains the measured value of the level of carbon dioxide from the measured value transmitter of the measurement device,

the air conditioner set value calculator of the air-conditioning controller further calculates an outer air amount set value introduced by the outer air coil within the range of the comfort index stored in the comfort index range recorder, so as to increase an introduced amount of outer air when cooling is required by the air conditioner and when enthalpy of the outer air is lower than enthalpy in the room, and introduce a minimum amount of outer air to lower the level of carbon dioxide in the room to less than a preset carbon dioxide level limit value when a load of the outer air cooling coil is higher than a predetermined value and when the measured value of the level of carbon dioxide obtained in the measured value obtaining unit is higher than the carbon dioxide level limit value,

the set value transmitter of the air-conditioning controller sends the outer air amount set value to be introduced by the outer air coil calculated in the air conditioner set value calculator to the air conditioner, and

the outer air coil of the air conditioner introduces outer air based on the outer air amount set value sent from the set value transmitter of the air-conditioning controller.

6. The air-conditioning control system of claim 1 or 3, wherein

the measurement device further measures a number of people in the room or the control zones in the room subject to the air-conditioning control,

the measured value transmitter of the measurement device further obtains a measured value of the number of people in the room or the control zones in the room subject to the air-conditioning control from, so as to send the obtained value to the air-conditioning controller,

the measured value obtaining unit of the air-conditioning controller further obtains the measure value of the number of people from the measured value transmitter of the measurement device,

the air conditioner set value calculator of the air-conditioning controller further calculates an outer air amount set value introduced by the outer air coil within the range of the comfort index stored in the comfort index range recorder, so as to increase an introduced amount of outer air when cooling is required by the air conditioner and when enthalpy of the outer air is lower than enthalpy in the room, and introduce a minimum amount of outer air to lower a level of carbon dioxide in the room to less than a preset carbon dioxide level limit value when a load of the outer air cooling coil is higher than a predetermined value and the measured value of the number of people is higher than a predetermined value,

the set value transmitter of the air-conditioning controller sends the outer air amount set value to be introduced by the outer air coil calculated in the air conditioner set value calculator to the air conditioner, and

the outer air coil of the air conditioner introduces outer air based on the outer air amount set value sent from the set value transmitter of the air-conditioning controller.

7. The air-conditioning control system of claim 1 or 3, wherein

the outer air coil and the return air coil are connected in series, and

cold water or hot water used in the outer air coil is reused in the return air coil.

3. An air-conditioning control system, comprising:

an air conditioner;

a water pump;

an air-conditioning controller for controlling operations the air conditioner and the water pump; and

a measurement device provided for a room or control zones divided in the room subject to an air-conditioning control, the measurement device for measuring temperature and humidity subject to the air-conditioning control,

the air conditioner, the water pump, the air-conditioning controller, and the measurement device being connected, wherein

the measurement device comprises a measured value transmitter for obtaining a temperature measured value and a humidity measured value measured in the room or the control zones in the room subject to the air-conditioning control, so as to send the obtained values to the air-conditioning controller;

the air conditioner comprises;

an outer air coil for introducing a certain amount of outer air, the outer air coil for controlling temperature and humidity of the introduced outer air based on a temperature set value and a humidity set value obtained from the air-conditioning controller;

a return air coil for introducing a certain amount of return air from the room or the control zones in the room subject to the air-conditioning control, the return air coil for controlling temperature of the introduced return air based on the temperature set value obtained from the air-conditioning controller; and

a blast fan for producing a mixed air of the outer air of which the temperature and humidity are controlled by the outer air cooling coil and the return air of which the temperature is controlled by the return air cooling coil, so as to supply the mixed air to the room or the control zones in the room subject to the air-conditioning control,

the water pump comprises a water supply unit for supplying externally supplied cold water or hot water to at least one of the outer air coil and the return air coil of the air conditioner based on a flow rate value obtained from the air-conditioning controller,

the air-conditioning controller comprises;

a measured value obtaining unit for obtaining the temperature measured value and the humidity measured value sent from the measured value transmitter of the measurement device;

a comfort index range recorder for storing a preset target set range of a comfort index;

an air conditioner set value calculator for calculating a temperature set value and a humidity set value of air supplied from the air conditioner within the target set range of the comfort index stored in the comfort index range recorder based on the temperature measured value and the humidity measured value obtained in the measured value obtaining unit, so that a sum of consumption energies of the outer air coil, the return air coil, the water pump, and the blast fan is a minimum value;

a set value transmitter for sending the temperature set value and the humidity set value calculated in the air-conditioner set value calculator to the air conditioner; and

a control value transmitter for calculating a flow rate value of the cold water or the hot water according to the temperature set value and the humidity set value calculated in the air-conditioner set value calculator, so as to send the calculated values to the water pump.