IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0728632
(2007-03-27)
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등록번호 |
US-8746584
(2014-06-10)
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발명자
/ 주소 |
|
출원인 / 주소 |
- Trance International Inc.
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
2 인용 특허 :
26 |
초록
▼
An air conditioning apparatus, including an electric motor driven blower for circulating air through a cabinet, also includes one or more electric heating elements and a system controller operable to control energization of the heating elements and the blower motor at predetermined operating conditi
An air conditioning apparatus, including an electric motor driven blower for circulating air through a cabinet, also includes one or more electric heating elements and a system controller operable to control energization of the heating elements and the blower motor at predetermined operating conditions by way of suitable relay or control elements. The system includes a heating interlock relay to prevent energization of the one or more heating elements if the blower motor is inoperable, operating at other than a predetermined range of speeds or the system controller detects a malfunctioning heating element control relay or the like.
대표청구항
▼
1. An air conditioning system comprising: an air blower including an electric blower motor for propelling air from an air inlet in a cabinet to an air outlet;at least one electric heating element disposed in an air flowstream propelled by said air blower through said cabinet;a heater interlock opera
1. An air conditioning system comprising: an air blower including an electric blower motor for propelling air from an air inlet in a cabinet to an air outlet;at least one electric heating element disposed in an air flowstream propelled by said air blower through said cabinet;a heater interlock operatively connected to said at least one electric heating element and operable to control energization thereof;at least one heater relay in communication with said heater interlock; anda system controller operable to communicate control signals for controlling operation of one or more components of the air conditioning system, said control signals being based on status signals indicative of one or more operating conditions corresponding to at least one of said air blower, said at least one electric heating element, said heater interlock, and said at least one heater relay, wherein said status signals include fault signals indicative of faulty operating conditions associated with at least one of said heater interlock or said at least one heater relay;wherein said system controller communicates a control signal instructing said heater interlock to prevent energization of said at least one electric heating element in response to occurrence of both (1) receiving a status signal indicating said electric blower motor is operating at a speed outside a predetermined range of speeds and (2) said at least one heater relay indicating a faulty operating condition. 2. The system set forth in claim 1, wherein said system controller is operatively connected to said at least one heater relay, said at least one heater relay being operable to control supply of electrical power to said at least one electric heating element, and wherein said heater interlock is interposed between said at least one electric heating element and said at least one heater relay. 3. The system set forth in claim 2, wherein said air blower includes a motor controller for controlling said electric blower motor, and wherein said system controller is operable to communicate command signals instructing said motor controller to operate said electric blower motor in conditions based on said status signals. 4. The system set forth in claim 3, wherein, upon receiving a fault signal indicating any one of said at least one heater relay and said heater interlock has malfunctioned, said system controller is operable to communicate a command signal instructing said motor controller to operate said electric blower motor in a predetermined direction and at a predetermined speed. 5. The system set forth in claim 4, wherein at least one of said at least one heater relay and said heater interlock is operable to communicate said fault signal to said system controller. 6. The system set forth in claim 3, wherein said electric blower motor is a permanent split capacitor (PSC) motor, and wherein said system controller is operable to communicate a command signal instructing said motor controller to select a motor speed for operating said electric blower motor, said motor speed being selected from a plurality of motor speeds. 7. The system set forth in claim 3, wherein said electric blower motor is a constant torque motor, and wherein said system controller is operable to communicate a command signal instructing said motor controller to select a constant torque setting for said electric blower motor, said constant torque setting being selected from a plurality of torque settings. 8. The system set forth in claim 3, wherein, upon receiving a fault signal indicating said heater interlock is operating in a faulty condition, said system controller communicates a command signal instructing said motor controller to operate said electric blower motor at a predetermined maximum speed. 9. The system set forth in claim 1, wherein said electric blower motor is a variable speed motor. 10. The system set forth in claim 9, wherein, upon receiving a status signal indicating said variable speed motor is operating at a speed lesser or greater than a predetermined amount, said system controller communicates a control signal instructing said heater interlock to prevent energization of said at least one electric heating element. 11. The system set forth in claim 1, wherein, upon receiving a status signal indicating said electric blower motor is operating at a speed greater than a predetermined maximum speed, said system controller communicates a control signal instructing said heater interlock to prevent energization of said at least one electric heating element. 12. A heating, ventilating, and air conditioning (HVAC) system for controlling electrical heating elements in accordance with fan operating conditions, the system comprising: an air conditioning apparatus including a cabinet,a fan operatively connected to the air conditioning apparatus, the fan including a motor for propelling air from an air inlet in the cabinet to an air outlet;a heat exchanger disposed within the cabinet between the air inlet and the fan; a plurality of electrical heating elements disposed in an airflow propelled by the fan through the cabinet;a thermostat for sensing temperature of an enclosed space being supplied with air conditioned by the HVAC system;a heater interlock operatively connected to the plurality of electrical heating elements and operable to control electrical power supplied thereto;one or more relays in communication with the plurality of electrical heating elements and the heater interlock;a controller operable to communicate signals for controlling operation of the HVAC system, the signals being based on status signals indicative of operating conditions associated with one or more components of the HVAC system, wherein said status signals include fault signals indicative of faulty operating conditions associated with at least one of said heater interlock or said one or more relays;wherein, upon receiving a status signal indicating the motor is operatively running above or below a maximum or a minimum speed, respectively, the controller communicates a shutoff signal instructing the heater interlock to prevent electrical power from being supplied to at least one electrical heating element selected from the plurality of electrical heating elements; andwherein, upon receiving a status signal indicating a rate of change in an air discharge temperature exceeding a predetermined value, the controller communicates a shutoff signal instructing one of, the heater interlock or at least one relay of the plurality of relays, to prevent electrical power from being supplied to at least one electrical heating element of the plurality of electrical heating elements. 13. The system of claim 12, wherein, upon receiving a status signal indicating the motor is not operating, the controller communicates a shutoff signal instructing the heater interlock to prevent electrical power from being supplied to each electrical heating element of the plurality of electrical heating elements. 14. The system of claim 12, wherein, upon receiving a status signal indicating the motor is not operating at or above a predetermined speed necessary for propelling air at a predetermined rate, the controller communicates a shutoff signal instructing the heater interlock to prevent electrical power from being supplied to at least one electrical heating element selected from the plurality of electrical heating elements. 15. The system of claim 12, wherein motor operating speed is continuously monitored. 16. The system of claim 15, wherein, upon receiving a status signal indicative of an airflow blockage through the cabinet, the controller communicates a shutoff signal instructing the heater interlock to prevent electrical power from being supplied to at least one electrical heating element selected from the plurality of electrical heating elements. 17. The system of claim 12, wherein, upon receiving a status signal indicating an air discharge temperature exceeding a predetermined value, the controller communicates a shutoff signal instructing the heater interlock to prevent electrical power from being supplied to at least one electrical heating element selected from the plurality of electrical heating elements. 18. The system of claim 12, wherein, upon a controller malfunction and the motor being de-energized, the heater interlock automatically prevents electrical power from being supplied to the plurality of electrical heating elements. 19. The system of claim 12, wherein upon receiving a status signal indicating the motor is not rotating in a specified direction, the controller communicates a shutoff signal instructing the heater interlock to prevent electrical power from being supplied to the plurality of electrical heating elements. 20. The system of claim 12, wherein, upon receiving a signal for a combined mode of operation, the controller communicates at least one control signal for effectuating the combined mode of operation, and wherein the combined mode of operation includes continuous operation of the motor, energization of the plurality of electrical heating elements, and operation of the heat exchanger to reject heat. 21. A heating, ventilating, and air conditioning (HVAC) system for controlling electrical heating elements in accordance with fan operating conditions, the system comprising: an air conditioning apparatus including a cabinet,a fan operatively connected to the air conditioning apparatus, the fan including a motor for propelling air from an air inlet in the cabinet to an air outlet;a heat exchanger disposed within the cabinet between the air inlet and the fan;a plurality of electrical heating elements disposed in an airflow propelled by the fan through the cabinet;a thermostat for sensing temperature of an enclosed space being supplied with air conditioned by the HVAC system;a heater interlock operatively connected to the plurality of electrical heating elements and operable to control electrical power supplied thereto;one or more relays in communication with the plurality of electrical heating elements and the heater interlock;a controller operable to communicate signals for controlling operation of the HVAC system, the signals being based on status signals indicative of operating conditions associated with one or more components of the HVAC system, wherein said status signals include fault signals indicative of faulty operating conditions associated with at least one of said heater interlock or said one or more relays;wherein, upon receiving a status signal indicating the motor is operatively running above or below a maximum or a minimum speed, respectively, the controller communicates a shutoff signal instructing the heater interlock to prevent electrical power from being supplied to at least one electrical heating element selected from the plurality of electrical heating elements; andwherein the HVAC system further comprises one or more relay contacts associated with at least one of the heater interlock and one of the one or more relays, respectively, wherein, upon receiving a status signal indicating one of the one or more relay contacts is improperly open or closed, the controller communicates a command signal for operating the motor at a maximum heat speed.
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