EP0660051A2 - Système à zones - Google Patents

Système à zones Download PDF

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Publication number
EP0660051A2
EP0660051A2 EP94630073A EP94630073A EP0660051A2 EP 0660051 A2 EP0660051 A2 EP 0660051A2 EP 94630073 A EP94630073 A EP 94630073A EP 94630073 A EP94630073 A EP 94630073A EP 0660051 A2 EP0660051 A2 EP 0660051A2
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EP
European Patent Office
Prior art keywords
zone
signal
damper
temperature
mode
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.)
Withdrawn
Application number
EP94630073A
Other languages
German (de)
English (en)
Other versions
EP0660051A3 (fr
Inventor
Kevin F. Dudley
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.)
Carrier Corp
Original Assignee
Carrier Corp
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 Carrier Corp filed Critical Carrier Corp
Publication of EP0660051A2 publication Critical patent/EP0660051A2/fr
Publication of EP0660051A3 publication Critical patent/EP0660051A3/fr
Withdrawn legal-status Critical Current

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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
    • 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
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/65—Electronic processing for selecting an operating mode
    • F24F11/67—Switching between heating and cooling modes
    • 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
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F24F11/76—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by means responsive to temperature, e.g. bimetal springs
    • 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
    • F24F11/88—Electrical aspects, e.g. circuits
    • 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
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/54—Control or safety arrangements characterised by user interfaces or communication using one central controller connected to several sub-controllers
    • 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
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature

Definitions

  • This invention relates to zoning systems for use in heating, ventilating and air conditioning systems where conditioned air is provided from a heating, ventilating and air conditioning system to a plurality of zones.
  • HVAC heating, ventilating and air conditioning
  • these zoning systems are difficult and expensive to install, both as original equipment and as retrofit.
  • Implementation of these systems typically requires the installation of dampers in the ductwork, installation of power and control wiring for the components of the system throughout the building, and installation of thermostats in the building walls.
  • Retrofits typically include modifications to the ductwork, power and control wiring throughout the building, and thermostat installations in walls.
  • these zoning systems typically include an expensive and difficult installation of a bypass damper system which is used to relieve excess static duct pressure.
  • a bypass damper is connected between the supply and return air duct.
  • An airflow sensor is disposed in the supply air duct and is connected to the bypass damper.
  • a bypass controller is also connected to the bypass damper and is used to modulate the bypass damper in response to the airflow measured by the airflow sensor.
  • the HVAC system is set in heat mode and the bypass damper is activated to relieve excess pressure in the duct, the recycled heated air may continue to increase in temperature, as it recycles, which may cause a limit switch to shut down the HVAC system. Elimination of the aforementioned bypass damper system would reduce the amount of HVAC system equipment which in turn would reduce installation and maintenance costs.
  • bypass damper system is similar to the bypass system mentioned above with the exception that the conditioned air is redirected to a dump, such as an equipment room, instead of being recycled to the intake duct.
  • This implementation has the additional disadvantage of lost efficiency because the energy used to condition the redirected conditioned air is wasted.
  • the zoning system of the present invention is characterized by the features set forth in claim 1.
  • a zoning system for use with a heating, ventilating and air conditioning system wherein the heating, ventilating and air conditioning system supplies conditioned air through a common duct to a plurality of zones.
  • a zone damper means is disposed at each zone outlet.
  • the zone damper means are adapted to control air flow from the common duct to the respective zones and to provide an automatic and inexpensive means to relieve excess static duct pressure.
  • a user interface is employed which provides a command signal to the zone darper means.
  • Temperature sensors which provide a temperature signal to the zone damper means are disposed in the zones.
  • the zone damper means controls the air flow from the common duct to the respective zones and provides an operating mode signal and a temperature related control signal to a main control.
  • the main control provides a system mode signal and a system capacity signal to the heating, ventilating and air conditioning system for controlling a system mode and a system capacity based on the mode and temperature related control signals received from the zone dampers.
  • the zone damper means includes both master zone dampers and slave zone dampers.
  • the master zone dampers are responsive to the user interface, the temperature sensor, and excess static duct pressure.
  • the slave zone dampers are responsive to both excess static duct pressure and to the master zone dampers.
  • the slave zone dampers are responsive to the master zone dampers such that the master zone dampers control the opening and closing of the slave zone dampers.
  • Figure 1 is a block diagram illustrative of a zoning system 10 according to the present invention.
  • the major components which make up the system include a user interface 15, a temperature sensor 20, a zone damper means 25, and a main control 30.
  • a means for conditioning air 35 which is a component of the HVAC system and controlled by the present invention is also shown.
  • the user interface 15 can be any device which allows a user to select temperature setpoints and system operating modes.
  • a hand held infra-red remote control may be used, such as the Sanwa CES0110032-00.
  • the user may select the setpoint and operating mode to achieve the desired zone temperature.
  • One user interface may be employed and carried from zone to zone, or multiple user interfaces may be employed, one in each zone as desired.
  • the temperature sensor 20 may be any device which produces an output responsive to its surrounding temperature, such as the MCI 10K THERMISTOR.
  • the temperature sensor 20 may be attached to a wall in a zone with a screw or, self adhesive pad, or any conventional securing means.
  • the zone damper means 25 controls the flow of conditioned air to the zones and provides an automatic and inexpensive means to relieve excess static duct pressure.
  • the zone damper means 25 is disposed at each zone outlet in the zones which receive conditioned air.
  • the main control 30 is used to control the system mode and equipment capacity (for variable capacity equipment) of the HVAC system.
  • the HVAC system may be any ducted system which supplies conditioned air to a plurality of zones.
  • FIG. 2 shows one preferred embodiment of the present invention arranged in a two zone structure which includes a zone damper means 25 including master zone dampers 40 and slave zone dampers 45.
  • each zone damper means 25 includes a master zone damper 40 and a slave zone damper 45.
  • any one zone damper means 25 may include only a master zone damper 40, or alternatively may include a master zone damper 40 and one or more slave zone dampers 45.
  • a master zone damper 40, a slave zone damper 45, and a temperature sensor 20 are shown in both zone 50 and zone 55.
  • the main control 30 and a means for conditioning air 35 are both shown in an equipment room 60.
  • the means for conditioning air 35 is a conventional component of the HVAC system which conditions the air and supplies the conditioned air to an air distribution system which supplies the conditioned air to the plurality of zones.
  • the means for conditioning air 35 has several system modes such as auto, heat, cool, fan and off modes.
  • the means for conditioning air 35 may have variable capacity capability or fixed capacity capability.
  • the user interface 15 transmits a command signal to the master zone damper 40 which is responsive to the command signal in a manner which will be described in more detail hereinbelow.
  • the user interface 15, may transmit the command signal by way of an infrared light beam 65, or alternatively, a radio frequency signal.
  • the command signal includes a temperature setpoint and an operating mode signal; both of which the user controls from the user interface 15.
  • the operating mode signal represents a request, from the respective zone, to the HVAC system for auto, heat, cool, fan or off mode.
  • the setpoint signal represents the desired temperature for that particular zone.
  • the temperature sensor 20 is connected to the master zone damper 40 by way of a thin cord 70 which couples with a sensor plug 75 located on the damper 40.
  • the master zone damper 40 receives, and is responsive to, a temperature signal from the temperature sensor 20.
  • the temperature signal represents the actual temperature in the zone in which a sensor 20 is located.
  • the master zone damper 40 transmits a damper position signal to the slave zone dampers 45.
  • the damper position signal controls the position of the flow control mechanism of the slave zone dampers 45, such that the master zone dampers 40 control the air flow of conditioned air to the zones though the slave zone dampers 45.
  • the master zone dampers 40 also transmit an operating mode signal and a temperature related control signal to the main control 30.
  • the operating mode signal is set by the user as described above.
  • the temperature related control signal is calculated by the master zone damper 40 and may be a temperature error signal which is the difference between the zone setpoint temperature selected by the user and the actual zone temperature.
  • the damper position signal, the operating mode signal, and the temperature error signal are transmitted by a power line carrier (“PLC”) means (shown in Figure 6).
  • PLC power line carrier
  • Such a circuit is well known in the art and no further description of the circuit, which allows information to be transmitted across a power line, is considered necessary for a full understanding of the present invention. It should be readily apparent to someone skilled in the art that these signals could be transmitted by means of radio frequency (“RF”) or by hardwiring the relevant system components.
  • RF radio frequency
  • the main control 30 is connected to a means for conditioning air 35 and is responsive to the operating mode signal and the temperature error signal from the master zone damper 40 such that the main control 30 provides the HVAC system with a system mode signal and a system capacity signal as will be appreciated as the system operation is described below.
  • the zone damper means 25 includes a zone damper assembly 80, zone damper circuitry 85, and a motor 130 for opening and closing the zone damper assembly 80, in response to inputs from the zone damper circuitry, as will be described hereinbelow.
  • the zone damper assembly 80 of the type for use with the present invention is common to both the master zone damper 40 and the slave zone damper 45 and is shown in simplified form. While the zone damper circuitry is generally designated by reference numeral 85, it will be seen that the master zone damper circuitry 150 (shown in Figure 5) is different from the slave zone damper circuitry 270 (shown in Figure 8).
  • the damper assembly 80 is sized such that it may be operatively installed in place of a conventional conditioned air outlet diffuser in a typical air distribution system.
  • the damper assembly 80 includes an outside grill 90 which is attached to a support housing 55.
  • the housing 95 shown only in outline, may be formed from sheet metal or other suitable material.
  • Operatively mounted to the support housing 95 are a plurality of damper blades 110.
  • Each of the damper blades 110 is pivotally mounted about a pivot point 115 in the support housing 95 for movement from a substantially vertical position, wherein the air flow through the damper is blocked, to a horizontal position wherein the air flow through the damper is at a maximum.
  • Each damper blade 110 is shown in an intermediate position in Figure 4.
  • the damper blades 110 are interconnected with one another at an intermediate pivot point 116 thereof by a vertically extending blade link 120. As a result the blade link 120 moves vertically and horizontally, as the blades 110 move about the pivot point 115.
  • An arcuately shaped slot 137 is provided in the left hand side of the blade link 120, as viewed in the drawing figures, for operationally cooperating with the damper assembly 25 to open the damper blades 110 as will be described hereinbelow.
  • An actuating arm 125 couples the blade link 120 to the motor 130 such that as the actuating arm 125 is turned by the motor 130 the blade link 120 causes the damper blades 110 to open or close.
  • One end 132 of the actuating arm 125 is connected to the motor 130.
  • a pin 135 is mounted to the other end 133 of the actuating arm 125.
  • the pin 135 is sized such that it is received in and operationally engages, the slot 137 on the blade link 120, as the actuating arm 125 moves counter clockwise. As a result the blade link 120 is caused to move upwardly and to the right, which, in turn, opens the damper blades 110.
  • a coil spring 140 is connected at one end to the arm pin 135 such that the spring 140 is operationally disposed at the second end 133 of the actuating arm 125.
  • the other end of the spring 140 is connected to a pin 145 mounted on the blade link 120 at a location above the slot 137.
  • the spring 140 as so mounted, is in tension and, as a result, as the actuating arm 125 turns clockwise the spring 140 pulls on the blade link 120 to close the damper blades 110.
  • the spring 140 is used to regulate the closing motion of the damper blades 110.
  • a solenoid may be used in place of the motor 130.
  • This arrangement provides automatic pressure relief which prevents excessive static duct pressures. For example, if the force against the damper blades 110, caused by the static pressure in the duct, is higher than the spring force, the blades 110 will swing open against the spring force to relieve the static duct pressure.
  • the spring force may be adjusted by moving the end of the spring 140 to different blade link pins 145 corresponding to different calibrated pressure relief settings.
  • the spring 140 is used to regulate the opening motion of the damper blades 110 caused by excess static pressure.
  • the zone damper circuitry 85 is used to control motion of the motor 130.
  • FIG. 5 shows a block diagram of the master zone damper circuitry 150.
  • the master zone damper circuitry 150 comprises a sensor plug 75, an a/d converter 155, a microprocessor 160, a user interface receiver 165, a motor control 170, motor control terminals 175, a d/a converter 180, a PLC circuit 185, power line terminals 190, a power cord 195, and a power supply 200, all electrically connected as shown.
  • the temperature sensor 20 is connected to the sensor plug 75 such that the sensor plug 75 receives the temperature signal.
  • the sensor plug 75 is connected to the a/d converter 155 and the a/d converter 155 is connected to the microprocessor 160 such that the a/d converter 155 converts the temperature signal to a digital temperature signal which is transmitted to the microprocessor 160.
  • a Harris CDP68HC68A2 may be used for the a/d converter 155 and an Intel 80C52 may be used for the microprocessor 160.
  • the user interface receiver 165 which is connected to the microprocessor 160, is used to receive the command signal from the user interface 15 and transmit the command signal to the microprocessor 160.
  • the microprocessor 160 also is connected to the serially connected combination of the motor control 170, motor control terminals 175, and the damper motor 130 such that the microprocessor 160 causes the motor control 170 to operationally regulate the damper motor 130 for opening or closing the damper blades 110.
  • An Allegro UNC58D4B may be used for the motor control 170.
  • the microprocessor 160 is also connected to the serially connected combination of the d/a converter 180, the PLC circuit 185, the power line terminals 190, and the power cord 195 for allowing the master zone damper 40 to transmit signals across the power line to the slave zone dampers 45 and the main control 30.
  • a Harris AD7520 may be used for the d/a converter 180.
  • One known embodiment of the PLC circuit 185 is shown in Figure 6.
  • the power supply 200 is used to provide electrical energy to the master zone damper circuitry 150.
  • the logic programmed into the microprocessor 160 in the master zone damper circuitry 150 is illustrated. Beginning at the block 205 labeled "start" the first step performed 210 is to determine the mode and setpoint from the command signal from the user interface 15. The next step 215 is to determine the zone temperature from the temperature signal. Then in step 220, the zone temperature is subtracted from the setpoint to determine the temperature error. If the mode is set to auto mode the microprocessor moves to step 230 where, if the temperature error is greater than one (1) the heat mode is selected in step 235. If the temperature error is less than negative one (-1) the cool mode is selected in step 245. If the temperature error is between one (1) and negative one (-1) the microprocessor 160 moves to step 250 and the fan mode is selected.
  • the microprocessor 160 moves to step 255 and determines the damper position as the absolute value of the temperature error multiplied by fifty percent (50%).
  • the damper position is limited to a value of 100% which corresponds to a fully opened damper.
  • the damper position is transmitted to the motor control 170 (shown in Figure 5) causing the damper motor 130 to adjust the damper blades 110 (shown in Figure 4) on the master zone dampers 40 to the position indicated by the damper position step 260.
  • the microprocessor 160 also transmits the damper position to the d/a converter 180 which transmits the damper position to the PLC circuit 185 which in turn transmits the damper position to the slave zone dampers 45 through the power line.
  • the slave zone dampers 45 use the damper position to adjust the damper blades 110 (shown in Figure 4) on the slave zone dampers 45 to the position indicated by the damper position step 260.
  • the microprocessor 160 in step 265 transmits the operating mode signal and the temperature error signal to the d/a converter 180 which transmits these signals to the PLC circuit 185 which in turn transmits these signals to the main control 30 through the power line.
  • step 225 if the auto mode is not selected then the process is the same as above with the exception that at step 225 the microprocessor 160 moves directly to step 255, instead of to step 230.
  • the mode selected by the user such as heat, cool, fan, or off is transmitted in step 265 to the main control 30.
  • FIG. 8 shows a block diagram of the slave zone damper circuitry 270.
  • the slave zone damper circuitry 270 comprises a microprocessor 160, an a/d converter 155, a PLC circuit 185, power line terminals 190, a power cord 195, a motor control 170, motor control terminals 175. and a power supply 200, all electrically connected as shown.
  • the microprocessor 160 is connected to the serially connected combination of the a/d converter 155, the PLC circuit 185, the power line terminals 190, and the power cord 195 for receiving the damper position signal transmitted across the power line from the master zone damper 40.
  • a Harris CDP68HC68A2 may be used for the a/d converter 155 and an Intel 80C52 may be used for the microprocessor 160.
  • One known embodiment of the PLC circuit 185 is shown in Figure 6.
  • the microprocessor 160 is also connected to the serially connected combination of the motor control 170, motor control terminals 175, and the damper motor 130 such that the microprocessor 160 causes the motor control 170 to regulate the damper motor 130 for opening or closing the damper blades 110.
  • An Allegro UNC58D4B may be used for the motor control 170.
  • the power supply 200 is used to provide electrical energy to the slave zone damper circuitry 270.
  • the logic programmed into the microprocessor 160 in the slave zone damper circuitry 270 is illustrated.
  • the first step performed 280 is to receive the damper position signal from the master zone damper 40 using the above mentioned PLC circuit 185.
  • the damper position signal is transmitted to the motor control 170 (shown in Figure 8) for causing the damper motor 130 to adjust the damper blades 110 (shown in Figure 4) on the slave zone dampers 40 to the position indicated by the damper position signal.
  • the main control 30 may be used for a variable capacity or a fixed capacity HVAC system.
  • Shown in Figure 10 is a block diagram of the main control circuitry 290 for a fixed capacity HVAC system.
  • the main control circuitry 290 for a fixed capacity HVAC system comprises a microprocessor 160, an a/d converter 155, a PLC circuit 185, power line terminals 190, a power cord 195, relays 295, signal terminals 300, control wiring 305, and a power supply 200.
  • the microprocessor 160 is connected to the serially connected combination of the a/d converter 155, the PLC circuit 185, the power line terminals 190, and the power cord 195 for receiving the system mode and the system capacity signals transmitted across the power line from the master zone damper 40.
  • a Harris CDP68HC68A2 may be used for the a/d converter 155 and an Intel 80C52 may be used for the microprocessor 160.
  • One known embodiment of the PLC circuit 185 is shown in Figure 6.
  • the microprocessor 160 also is connected to the serially connected combination of the relays 295, the signal terminals 300, the control wiring 305, and the means for conditioning air 35 for controlling the system mode of the means for conditioning air 35.
  • the power supply 200 is used to provide electrical energy to the main control circuitry 290.
  • FIG. 11 Shown in Figure 11 is a block diagram of the main control circuitry 310 for a variable capacity HVAC system.
  • the main control circuitry 310 for a variable capacity HVAC system comprises a microprocessor 160, an a/d converter 155, a PLC circuit 185, power line terminals 190, a power cord 195, a serial communication transceiver 315, signal terminals 300, control wiring 305, and a power supply 200.
  • the microprocessor 160 is connected to the serially connected combination of the a/d converter 155, the PLC circuit 185, the power line terminals 190, and the power cord 195 for receiving the system mode and the system capacity signals transmitted across the power line from the master zone damper 40.
  • a Harris CDP68HC68A2 may be used for the a/d converter 155 and an Intel 80C52 may be used for the microprocessor 160.
  • One known embodiment of the PLC circuit 185 is shown in Figure 6.
  • the microprocessor 160 also is connected to the serially connected combination of the serial communication transceiver 315, the signal terminals 300, the control wiring 305, and the means for conditioning air 35 for controlling the system mode and the system capacity of the means for conditioning air 35.
  • a linear LTC485 may be used for the serial communication transceiver.
  • the power supply 200 is used to provide electrical energy to the main control circuitry 310.
  • the logic programmed into the microprocessor 160 in the main control circuitry 290, 310 for both a fixed capacity and a variable capacity HVAC system is illustrated.
  • the first step performed 325 is to receive the operating mode and temperature error signals from the master zone dampers 40.
  • step 330 it is determined if there are any zones calling for heating or cooling from the information in the received operating mode signals. If there are no heat or cool zones then the microprocessor 160 moves to step 335 to determine, from the operating mode signal, if there are any fan zones. If no fan zones exist then the system mode is set to "off" in step 340. If at least one fan zone exists, then the system mode is set to fan mode in step 345.
  • step 330 If in step 330 it was determined that there is at least one heat and/or cool zones then the microprocessor 160 moves to step 350 to determine if the number of heat zones is equal to the number of cool zones. If the number of heat zones is equal to the number of cool zones the microprocessor 160 moves to step 355 and sets the system mode to the mode of the zone with the largest absolute temperature error. If in step 350 the number of heat zones is not equal to the number of cool zones the microprocessor 160 moves to step 360 and sets the system mode to the mode with the larger number of zones. Once the system mode is determined it is transmitted to the means for conditioning air 35 in step 365. In step 370 the microprocessor 160 determines whether the HVAC system is a fixed capacity system or a variable capacity system.
  • zone 1 has a temperature of 71.5 degrees
  • zone 2 has a temperature of 72 degrees and that the user has selected auto mode and a setpoint of 70 degrees for both zone 1 and zone 2.
  • the HVAC system has a variable capacity and that both zone 1 and zone 2 each have one master zone damper 40 and one slave zone damper 45.
  • the master zone dampers 40 in zone 1 and zone 2 determine that the auto mode and a setpoint of 70 degrees are selected in step 210.
  • the master zone dampers 40 determine a zone 1 temperature of 71.5 and a zone 2 temperature of 72 degrees.
  • the microprocessor 160 calculates the temperature errors in step 220; in zone 1 the temperature error is -1.5 and in zone 2 the temperature error is -2.
  • the cool mode for both zone 1 and zone 2 is selected in step 245 because both temperature errors are less than -1 and the auto mode was selected in both zones.
  • the microprocessor 160 calculates the damper position to be the absolute value of the temperature error multiplied by 50%; the damper position in zone 1 is 75% and the damper position in zone 2 is 100%.
  • the master zone damper 40 uses the damper positions to adjust the damper blades 110 on the master zone dampers 40 to a corresponding position. For example, the zone 1 damper position will adjust to a 75% open position.
  • the damper position signals are transmitted to the respective slave zone dampers 45 in step 260 and the operating mode and temperature error signals are transmitted to the main control 30 in step 265.
  • each slave zone damper 45 receives the damper position signal from its respective master zone damper 40 in step 280 which is used, in step 285, to adjust the respective slave zone damper openings to the above mentioned positions.
  • the main control 30 receives the operating mode and temperature error signals from the master zone dampers 45 in step 325. Since there are two cool zones and no heat zones, the microprocessor 160 moves to step 360 to calculate the system mode. In step 360, the microprocessor 160 sets the system mode to the cool mode, which is the mode with the maximum number of zones. The system mode is sent to the means for conditioning air 35 so as to set the means for conditioning air 35 to the cool mode. In this example, the microprocessor 160 moves to step 375 because the HVAC system has a variable capacity. The system capacity is calculated as ((100% / 2 degrees F.) / (2)) * 3.5 in step 375. Thus, the system capacity, in this example, is calculated as 87.5% and in step 380 is transmitted to the means for conditioning air 35 so that the means for conditioning air 35 is adjusted to 87.5% of its maximum capacity.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Fluid Mechanics (AREA)
  • Air Conditioning Control Device (AREA)
EP94630073A 1993-12-23 1994-12-22 Système à zones. Withdrawn EP0660051A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US17231693A 1993-12-23 1993-12-23
US172316 1993-12-23

Publications (2)

Publication Number Publication Date
EP0660051A2 true EP0660051A2 (fr) 1995-06-28
EP0660051A3 EP0660051A3 (fr) 1997-06-04

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EP94630073A Withdrawn EP0660051A3 (fr) 1993-12-23 1994-12-22 Système à zones.

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AU (1) AU8164394A (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005072198A2 (fr) * 2004-01-20 2005-08-11 Carrier Corporation Procede de verification du fonctionnement de l'installation d'un systeme de climatisation a plusieurs zones
EP2998660A1 (fr) * 2014-09-19 2016-03-23 Samsung Electronics Co., Ltd. Unité intérieure de climatiseur, appareil terminal de commande et procédé de conditionnement d'air
US10126009B2 (en) 2014-06-20 2018-11-13 Honeywell International Inc. HVAC zoning devices, systems, and methods
CN114923219A (zh) * 2022-06-22 2022-08-19 美的集团武汉暖通设备有限公司 空调控制方法、空调系统及空调器

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5345966A (en) * 1993-12-23 1994-09-13 Carrier Corporation Powered damper having automatic static duct pressure relief

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WO2005072198A2 (fr) * 2004-01-20 2005-08-11 Carrier Corporation Procede de verification du fonctionnement de l'installation d'un systeme de climatisation a plusieurs zones
WO2005072198A3 (fr) * 2004-01-20 2006-03-30 Carrier Corp Procede de verification du fonctionnement de l'installation d'un systeme de climatisation a plusieurs zones
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AU8164394A (en) 1995-06-29

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