IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0268065
(1981-05-28)
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우선권정보 |
JP-0072824 (1980-06-02) |
발명자
/ 주소 |
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출원인 / 주소 |
- Nissan Motor Company, Limited
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
1 인용 특허 :
2 |
초록
▼
An air conditioner for an automotive vehicle having an air conditioner compressor driven with a crankpulley of an internal combustion engine, with an electromagnetic clutch energized, and linked with an evaporator for cooling and dehumidifying the intake air and an air mixing door located upstream o
An air conditioner for an automotive vehicle having an air conditioner compressor driven with a crankpulley of an internal combustion engine, with an electromagnetic clutch energized, and linked with an evaporator for cooling and dehumidifying the intake air and an air mixing door located upstream of a heater core for heating the intake air. In such a conventional air conditioner there is provided, in addition to a manipulating lever located on a control panel and first switch indicated by A/C switch for actuating the clutch of the air conditioner compressor, a first engagement mechanism linked with said manipulating lever and engaged with a lever attached to the air mixing door for adjusting the degree of opening of the air mixing door so as to determine the quantity of air passing through the heater core according to the position to which the manipulating lever is moved in the heating direction with the first switch turned off, a second switch connected in parallel with the first switch which turns on in response to a temperature signal from a temperature sensing means adjacently located downstream from the evaporator, and a second engagement mechanism linked with the manipulating lever and with the second switch for adjusting the on-and-off time period of the second switch according to a position to which the manipulating lever is moved in the cooling position, with the first switch turned on, whereby the air conditioner compressor is actuated efficiently so that an engine fuel can be saved remarkably.
대표청구항
▼
1. An air conditioner for an automotive vehicle's compartment having an air conditioner compressor actuated by means of an internal combustion engine of the vehicle with an electromagnetic clutch provided therein energized and linked with an evaporator, located downstream of an air blower for inspir
1. An air conditioner for an automotive vehicle's compartment having an air conditioner compressor actuated by means of an internal combustion engine of the vehicle with an electromagnetic clutch provided therein energized and linked with an evaporator, located downstream of an air blower for inspiring an intake air, which constitutes an air cooling system with the air conditioner compressor and an air-mixing door located adjacent to and upstream of a heater core through which hot water from the engine cooling system is circulated for heating the air passing therethrough and located downstream of the evaporator for adjusting the amount of air flowing through the heater core, said air conditioner comprising: (a) a pivotable manipulating lever (11),one end thereof being projected from a control panel so as to pivot along the control panel between two extremes; (b) a first switch (22) provided electrically between a DC power supply of the automotive vehicle and the electromagnetic clutch of the air conditioner compressor located at a position below said manipulating lever such that said manipulating lever turns said first switch on while said manipulating lever is pivoted along the control panel toward a position for cooling the intake air inspired by the air blower for connecting the DC power supply to the clutch of the air conditioner compressor to actuate the air compressor when said switch is turned on; (c) a first engagement mechanism (9, 38, and 40) linked with said manipulating lever and engaged with an air-mixing door actuating lever fixed to the air-mixing door for cooperatively adjusting the degree of opening of the air mixing door so as to determine the quantity of intake air passing through the heating core according to an angular displacement of said manipulative lever toward a position for heating the intake air inspired by the air blower, with said first switch turned off so as to interrupt the air conditioner compressor; (d) a second switch (25), connected electrically in series with said first switch for operatively actuating the clutch of the air conditioner compressor with said first switch turned on, which turns on so as to actuate the clutch of the air conditioner compressor when pressure of gas within a temperature sensing bulb located downstream of the evaporator for detecting the temperature of the intake air passed through the evaporator is increased according to the increase in the intake air temperature passed through the evaporator above a predetermined reference temperature value; and (e) a second engagement mechanism (10, 37 and 39), linked with said manipulating lever and engaged with said second switch, which controls an interval of time between turning on and subsequent turning off of said second switch which corresponds to changing of the predetermined reference temperature value so as to adjust the rate of operation of the air conditioner compressor according to a displacement of said manipulating lever toward the position for cooling the intake air inspired by the air blower and holds said interval time therebetween at maximum which corresponds to holding the predetermined reference temperature value of the temperature sensing bulb at its maximum value when said manipulating lever is angularly displaced toward the position for heating the intake air inspired by the air blower. 2. An air conditioner for an automotive vehicle as set forth in claim 1, which further comprises: (f) a third switch (26) connected electrically in parallel with said first switch for actuating the clutch of the air compressor when turned on so as to dehumidify the inside air of the automotive vehicle when said manipulating is positioned in the heating range. 3. An air conditioner for an automotive vehicle as set forth in claim 2, wherein said second switch is set to turn on in the maximum on-and-off time period. 4. The air conditioner as set forth in claim 1, wherein said first engagement mechanism maintains the air-mixing door actuating lever at a fixed position so as to close the air-mixing door to block the air flow cooled by the evaporator through the heater core while said manipulating lever is angularly displaced in the position for cooling the intake air inspired by the air blower, whereby the intake air cooled by the evaporator does not pass through the heater core but passes wholly through a bypass thereof. 5. The air conditioner as set forth in claim 1, wherein said first switch is located below said manipulating lever and includes a projecting member having a movable contact fixed thereto and a pair of stationary contacts, one of the stationary contacts being connected to a DC voltage supply and the other stationary contact being connected to the clutch of the air conditioner compressor via said second switch, said projecting member being located in the course of movement of said manipulating lever toward the position for cooling the intake air inspired by the air blower so that said movable contact is brought in contact with said stationary contacts to turn on said first manipulating lever. 6. An air conditioner for an automotive vehicle as set forth in claim 5, wherein said first switch is a selfreturning push-button switch. 7. The air conditioner as set forth in claim 1, wherein said second switch comprises: (a) a casing having a pair of stationary contacts fixed thereto, one of said stationary contacts being connected to said first switch and the other being connected to the clutch of the air conditioner compressor; (b) a bellows mounted within said casing, one end thereof linked with the temperature sensing means and the other end thereof provided with a metal piece serving as a movable contact, which moves toward said pair of stationary contacts so that said metal piece is brought in contact with said pair of stationary contacts according to the temperature-indicative signal sent from the temperature sensing means; (c) a spring, one end thereof connected to the other end of said bellows; and (d) a screw engaged with the other end of said spring and having a threaded portion rotatably inserted through said casing which supports said spring so as to adjust a distance between said metal piece attached to said bellows and said pair of stationary contacts in response to a displacement of said second engagement mechanism when said manipulating lever is displaced toward the position for cooling the intake air inspired by the air blower. 8. An air conditioner as set forth in claim 1, wherein said first engagement mechanism comprises: (a) a first rack gear (12) provided on one side of said manipulating lever with its axle as a center; (b) a first pinion gear (17) engaged with and turned by said first rack gear when said manipulating lever is moved into the heating range of the temperature-adjustment range so as to open or close the air-mixing door; (c) a first linkage member (18 and 19) connected between an axle of said first pinion gear and air-mixing door actuating lever for transmitting the rotational movement of said first pinion gear with respect to said first rack gear to the air mixing door actuating lever so as to adjust the degree of opening of the air mixing door according to the position at which said manipulating lever is moved. 9. An air conditioner for an automotive vehicle as set forth in claim 8, wherein said first linkage member comprises a first pinion gear lever (18), attached to an axle of said first pinion gear, which rotates with the rotational movement of said first pinion gear and a first rod (19) connected between said first pinion gear lever and air mixing door actuating lever for changing the rotational movement of said first pinion gear lever to a reciprocal movement to rotate the air mixing door actuating lever. 10. An air conditioner for an automotive vehicle as set forth in claim 8, wherein said first pinion gear disengages with said first rack gear, closing the air mixing door fully so as not to pass the intake air through the heater core, when said manipulating lever is moved into the cooling range of the temperature-adjustment range. 11. An air conditioner for an automotive vehicle as set forth in claim 1 or 8, wherein said second engagement mechanism comprises: (a) a second rack gear (13) provided on the side opposite of said manipulating lever with its axle as a center; (b) a second pinion gear (21) engaged with and turned by said second rack gear when said manipulating lever is moved so as to adjust the on-and-off time period of said second switch; (c) a second linkage member (23, 23a and 24) connected between an axle of said second pinion gear and said second switch for transmitting the rotational movement of said second pinion gear with respect to said second rack gear to said second switch. 12. An air conditioner as set forth in claim 11, wherein said second linkage member comprises a second pinion gear lever (23), attached to the axle of said second pinion gear, which rotates with said second pinion gear, a second switch adjusting lever (23a) connected to said second switch, and a second rod (24) connected between said second pinion gear lever and said second switch adjusting lever for changing the rotational movement of said second pinion gear lever to a reciprocal movement to rotate said second switch adjusting lever so as to adjust the on-and-off time period. 13. An air conditioner for an automotive vehicle as set forth in claim 11, wherein said second pinion gear disengages with said second rack gear, said second pinion setting said second switch in the maximum on-and-off time period, when said manipulating lever is moved into the heating portion of the temperature-adjustment range. 14. The air conditioner as set forth in claim 7 or 12, wherein said second switch adjusting lever is fixed to said screw of said second switch. 15. The air conditioner as set forth in claim 1, wherein said first engagement mechanism comprises: (a) a first elongated rod (40), one end thereof pivotally fixed to the other end of said manipulating lever; and (b) a heating control link (38), having an elongated hole with which the other end of said first elongated rod is engaged, which pivots in response to the angular displacement of said manipuating lever for transmitting the displacement of said manipulating lever to the air-mixing door actuating lever so as to adjust the opening angle of the air-mixing door in proportion to the angular displacement of said manipulating lever toward the position for heating the intake air inspired by the air blower and locking the transmission thereof to the air-mixing door actuating lever with the air-mixing door in the position to block the air flow through the heater core when said manipulating lever is moved into the position of the cooling range of the temperature-adjustment range. 16. The air conditioner as set forth in claim 15, wherein the elongated hole of said heating control link has a first inaction zone in which said heating control link does not pivot so as to actuate said air-mixing door actuating lever, regardless of the movement of said first elongated rod, during the displacement of said manipulating lever in the cooling position of the temperature-adjustment range. 17. The air conditioner as set forth in claim 7, wherein said second engagement mechanism comprises: (a) a second elongated rod (39), one end thereof pivotally fixed to the other end of said manipulating lever; (b) a cooling control link (37), having an elongated hole with which the other end of said second elongated rod is engaged which pivots in response to the displacement of said manipulating lever for transmitting the displacement of said manipulating lever to said second switch so as to control said interval of time of said second switch in proportion to the displacement of said manipulating lever toward the position for heating the intake air inspired by the air blower and locking the transmission thereof to said second switch, with said interval of time set at the maximum when said manipulating lever is displaced into the position of the heating range of the temperature-adjustment range; and (c) a third linkage member (42) adaptively fitted to said cooling control link and to said screw of said second switch for converting the pivotal displacement of said cooling control link to a corresponding rotational movement so as to turn said screw to move toward said bellows via said spring of said second switch. 18. The air conditioner as set forth in claim 17, wherein the elongated hole of said cooling control link has a second inaction zone in which said cooling control link does not pivot so as to actuate said third linkage member, regardless of the movement of said second elongated rod, when said manipulating lever is moved into position of the heating range of the temperature-adjustment range. 19. An air conditioner for an automotive vehicle's compartment which comprises: (a) an air conditioner compressor and an air conditioner compressor driving circuit for driving said compressor; (b) an evaporator operatively connected to said compressor for cooling an intake air inspired by an air blower; (c) a heater core arranged at a location downstream of said evaporator; (d) a passage bypassing said heater core; (e) a pivotable air-mixing door disposed to guide an air flow from said evaporator, respectively, through only said bypass passage at a first angular position, through only said heater core at a second angular position, and through said bypass passage and through the heater core between the first and second angular positions; (f) a lever which is pivoted between a first angular range and a second angular range with a fulcrum thereto as a center; (g) a first linkage member connected between said lever and air-mixing door which controls the angular position of said air-mixing door continuously between the first and second angular positions when said lever is angularly displaced within the first angular range and holds the angular position of said air-mixing door at the first angular position when said lever is angularly displaced within the second angular range; (h) a temperature sensor located downstream of said evaporator for detecting the temperature of the intake air passed through said evaporator; (i) a first switch member included in said compressor driving circuit operable to close said compressor driving circuit so as to actuate said compressor when said lever is angularly displaced within the second angular range; (j) a second switch member, included in said compressor driving circuit in series with said first switch member and linked with said temperature sensor, which is operable to close said compressor driving circuit so as to actuate said compressor with said first switching member when said temperature sensor produces an output signal indicating that the temperature of intake air passed through said evaporator exceeds a predetermined temperature value and to open said compressor driving circuit to render said compressor inoperative when said temperature sensor produces no output signal to indicate that the temperature of the intake air passed through said evaporator is below the predetermined temperature value; (k) a second linkage member connected between said lever and second switch member which controls an interval of time between the closures of said second switch member so as to adjust the range of operation of said compressor continuously when said lever is angularly displaced within the second angular range and holds the interval of time at maximum when said lever is angularly displaced within the first angular range; and (l) a third switching member, included in said compressor driving circuit in parallel with said first switch member, operable to close said compressor driving circuit so as to actuate said compressor when said lever is angularly displaced within said first and second angular ranges regardless of the open and closure of said first switch member.
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