JP2661035B2 - Vehicle air conditioner - Google Patents

Description

The present invention relates to a vehicle air conditioner including a plurality of dampers for selectively opening and closing a plurality of openings respectively communicating with a plurality of outlets in a vehicle compartment. In particular, the present invention relates to prevention of vibration of a damper and improvement of hermeticity. [Prior Art] Conventionally, in a vehicle air conditioner, dampers are provided at a plurality of openings respectively communicating with the respective air outlets, in order to select the blowing of conditioned air at a plurality of air outlets in a vehicle cabin. The dampers are operated by operating means having a link mechanism for interlocking a plurality of dampers according to the use mode, and the individual dampers are independently opened and closed. [Problems to be Solved by the Invention] However, since the dampers are independently opened and closed only by the urging force of the operating means of the dampers,
In an open state where the heater unit case that houses the damper is not in contact with the surface of the heater unit case, the damper becomes unstable and the tip of the damper vibrates, or only one opening is opened and the other opening is opened. If you want to concentrate the blown air while maintaining the air pressure, for example, to remove the frost, fogging, etc. of the front glass by the defrost mode, the urging force of other dampers that need to be kept closed when the blower blow rate is large is large. Becomes insufficient with respect to the amount of air blown, the airtightness between the heater unit case accommodating the damper and the damper is reduced, and air may leak from these openings. An object of the present invention is a vehicle air conditioner that opens and closes each opening communicating with a plurality of outlets with a plurality of dampers,
A vehicle air conditioner capable of preventing and stabilizing vibration of a damper in an open state and improving the airtightness of another damper in a closed state and a heater unit case having an opening closed by the damper. To provide. Means for Solving the Problems In order to solve the above object, the present invention provides a heater unit case (40) and a heater unit case (40).
First opening (43) that is provided in the vehicle and blows out air into the vehicle interior
A second opening (44) provided in the heater unit case (40) for blowing air into the vehicle interior; and a second opening (43) provided rotatably in the heater unit case (40). ), And a first damper (50) for opening and closing the heater unit case (40).
A second damper (60) for opening and closing the opening (44), wherein the first damper (50) is configured such that the first damper (50) opens the first opening (43) and the 2 dampers (60)
Abuts on the second damper (60) when the second opening (44) is in the open state, and the second damper (60)
It is a technical means that the second opening (44) is configured to urge a force in a direction to close the second opening (44). [Operation and Effect of the Invention] With the above configuration, in the present invention, the first opening is opened and closed by the rotation of the first damper, and the second opening is opened and closed by the rotation of the second damper. The first damper is in contact with the second damper when the first damper has the first opening in the open state and the second damper has the second opening in the closed state. The force in the direction to close the part is urged. Therefore, the first damper comes into contact with the second damper and is stabilized, and the first damper does not generate vibration. Further, since the second damper is urged by the first damper to close the second opening, the airtightness in the second opening is improved. [Example] Next, a vehicle air conditioner of the present invention will be described based on an example. FIG. 1 schematically shows a vehicle air conditioner of the present invention. The vehicle air conditioner includes a hot water circuit A that circulates cooling water warmed by the vehicle traveling engine 10 and a refrigerant circuit B that includes a refrigerant compressor 20 driven by the vehicle traveling engine 10. An air-conditioning ventilation passage C for sending air into a vehicle interior at a desired temperature by a heat exchanger provided in each circuit. The hot water circuit A is provided for heating the air, and the heated cooling water in the cooling water jacket of the engine 10 is supplied to the heater core 12 and the hot water circulation path 13 circulated through the water valve 11. The air is heated when passing through the gap between the radiating fins of the heater core 12. The refrigerant circuit B is provided for cooling the air, and includes a refrigerant compressor 20, a condenser 21, a receiver 22, an expansion valve 23, an evaporator 24, and a refrigerant circuit for connecting these and circulating the refrigerant. Road 25. The refrigerant compressor 20 is driven by an electromagnetic clutch 20a in which the rotational force of the vehicle running engine 10 is transmitted via a fan belt from a fan pulley 14 provided on a rotating shaft of the engine 10, and is controlled by a control circuit (not shown). 20a
Rotates only when energized, and compresses the refrigerant in the refrigerant circuit B. The condenser 21 is generally provided on the front surface of the vehicle running engine 10, and in the present embodiment, is cooled by a cooling fan 15 provided on a rotating shaft of the engine 10 to cool the gas-phase refrigerant passing therethrough. Liquid refrigerant. The receiver 22 flows the refrigerant cooled by the condenser 21,
It discharges only the liquid-phase refrigerant among the refrigerants. The liquid-phase refrigerant is adiabatically expanded by the expansion valve 23, becomes a mist-like refrigerant, and becomes an evaporator.
Sent to 24. In the evaporator 24, the refrigerant absorbs heat from the outside and evaporates to become a gas-phase refrigerant, and the air is cooled when passing through the fin gap of the evaporator 24. The air-conditioning ventilation passage C is provided on the upstream side, accommodates the evaporator 24, and sucks air from the vehicle interior or exterior, and the cooler unit case 30 provided on the downstream side to switch the heater core 12 and the air outlet. And a heater unit case 40 constituting a heater unit accommodating a single damper. At the upstream end of the cooler unit case 30, an outside air inlet 31
An internal / external air switching damper 33 for switching between the air and the internal air circulation port 32 is provided, and the air to be taken in is selected. A blower motor 34 is provided downstream of the inside / outside air switching damper 33. The blower motor 34 sucks air from the outside air inlet 31 or the inside air circulation port 32 selected by the inside / outside air switching damper 33, and sends the air into the cooler unit case 30. An evaporator 24 forming a part of the refrigerant circuit B is provided downstream of the blower motor 34, and cools the air passing through the cooler unit case 30 when the refrigerant compressor 20 operates. Downstream of the cooler unit case 30, a heater unit case 40 constituting a heater unit is provided. In the heater unit case 40, as shown in FIG. 3, a heater core 12 which is a heat exchanger of a hot water circuit A for heating passing air by engine cooling water of the vehicle is provided. An air mix damper 41 that guides a part of the air passing through the inside of the heater unit case 40 to the heater core 12 is provided on the suction port 12a side of the heater core 12, and air discharged from the heater core 12 is provided on the discharge port 12b side of the heater core 12. Are mixed with air passing through the heater unit case 40. The two air mix dampers 41 and 42 operate in conjunction with each other to adjust the amount of air passing through the heater core 12. . As shown in FIG. 2, the heater unit case 40 is provided with an opening 43, an opening 44, and an opening 45, and the opening 43 has a defroster damper 50, the opening 44 has a heat damper 60, A bypass damper 70 is provided at an upstream portion of the opening 45. A defroster damper 50 provided in the opening 43 is rotatably supported by a rotating shaft 52 via a flat arm 51. When the opening 43 is opened, most of the defroster damper 50 is located inside the heater unit case 40. Is rotated and accommodated. Defroster damper
The gasket 50 is provided with packings 53 and 54 at portions that come into contact with the heater unit case 40 when the opening 43 is closed to maintain airtightness when the opening is closed. A packing 55 is also provided on an inner portion that becomes the tip of the defroster damper 50 when the defroster damper 50 rotates and is housed inside the heater unit case 40. The opening 43 is connected to a defroster duct 57 that guides conditioned air to a defroster outlet 56 in the vehicle compartment when the defroster damper 50 opens the opening 43. On the other hand, the heat damper 60 provided in the opening 44 also has a pivot shaft through a flat arm 61 like the defroster damper 50.
62 is rotatably supported. And heat damper 60
Also, packings 63 and 64 are provided at portions where the opening 44 is in contact with the heater unit case 40 when the opening 44 is closed. The arm 61 of the heat damper 60 is provided with a rib 61a from the fulcrum supported by the rotating shaft 62 toward the inside of the heater unit case 40. When the opening 43 is opened, the rib 61a is a part where the defroster damper 50 rotates and is housed inside the heater unit case 40 and becomes an abutting part with the inner part which becomes the tip part, thereby preventing the vibration of the defroster damper 50. In addition, the heat damper 60 is provided to apply a rotational torque that urges the heat damper 60 in the closing direction. In the present embodiment, the heat damper 60 receives a left-hand rotational torque in FIG. In the present embodiment, the heater unit case 40, the defrost damper 50, and the heat damper 60 are all formed of composite polypropylene, the arm 51 is formed integrally with the defroster damper 50, and the arm 61 is formed integrally with the heat damper 60. A metal plate such as an iron plate may be used. On the other hand, the packings 53, 54, 55, 63, and 64 are all made of porous polyurethane and fixed to almost the entire surface of each damper with an adhesive, but other foam materials may be used. Heater unit case 40 equipped with heat damper 60
The opening 44 is provided with a foot heating duct 65 so as to close the opening 44. When the opening 44 is opened by the heat damper 60, the conditioned air is supplied to the foot outlet 68 through the openings 66 and 67. Lead to. A bypass damper 70 provided upstream of the opening 45
Operates in conjunction with the air mix dampers 41, 42, and the air mix dampers 41, 42, as shown by the dashed line in FIG.
When the suction port 12a and the discharge port 12b of the heater core 12 are closed and slightly opened, the opening 45 is opened, and air that does not pass through the heater core 12 is directly guided to the opening 45. In the opening 45 provided in the heater unit case 40,
A ventilation duct 71 is provided so as to cover the opening 45. The ventilation duct 71 forms a three-way branch box. As shown in FIG. 3, a ventilation outlet 72 is provided at the tip, and openings 73 and 74 are provided on both sides. Further, a ventilation damper 75 for shutting off conditioned air to the ventilation outlet 72 is provided upstream of the ventilation outlet 72. Opening 7
3 and 74 are provided with side ducts 78 and 79 communicating with the side outlets 76 and 77, respectively.
Can be closed by manually operating a blowing direction adjusting means (not shown) provided in the side air outlets 76 and 77 to bring it into a fully closed state. On the other hand, the operation panel shown in FIG.
80 are provided. The operation panel 80 includes an inside / outside air switching lever 81, an air outlet switching lever 82, a temperature setting lever 83, a fan switch 84,
Air conditioner switches 85 are provided. The inside / outside air switching lever 81 is for operating an inside / outside air switching damper 33 for switching the outside air introduction port 31 or the inside air circulation port 32. The air outlet switching lever 82 is a defroster damper that opens and closes each opening provided in the heater unit case 40 and the ventilation duct 71.
The mode of the air outlet is switched by driving the heat damper 50, the heat damper 60, and the ventilation damper 75 via an interlocking link by an actuator 86. The temperature setting lever 83 operates the air mix dampers 41 and 42 and the bypass damper 70 to adjust the amount of air passing through the heater core 12 to set a desired temperature.
41 and 42 shut off the inlet 12a and the outlet 12b of the heater core 12 when the temperature setting lever 83 is at the right end in the figure, and gradually open as it moves to the left. Further, the bypass damper 70 opens the upstream portion of the opening 45 while the temperature setting lever 83 moves left and right about three times from when the temperature setting lever 83 is at the right end in the drawing. The fan switch 84 adjusts the rotation speed of the blower motor 34 in a stepwise manner for controlling the air flow. The air conditioner switch 85 detects the temperature of the air inside and outside the vehicle interior and the temperature of each part, turns on the control circuit for operating the electromagnetic clutch 20a for driving the refrigerant compressor 20, and can select the operation in two stages. The air conditioner switch 85 can turn on the control circuit only when the fan switch 84 is closed. For switching of each outlet by the outlet switching lever 82,
From the left side of the figure, vent mode that opens only the ventilation outlet 72, the ventilation outlet 72 and the foot outlet
Bi-level mode that opens 68, heat mode that opens only the foot outlet 68, foot outlet 68 and defroster outlet
There is a defroster & heat mode in which 56 is opened, and a defroster mode in which only the defroster outlet 56 is opened. With the above configuration, the vehicle air conditioner of the present invention operates as follows. When the fan switch 84 is turned on and the inside / outside air switching lever 81 is operated, the blower motor 34 sucks air selected by the inside / outside air switching damper 33 from the outside air introduction port 31 or the inside circulation port 32, and sends the air at the set rotation speed. The air volume is sent into the cooler unit case 30. The air introduced into the cooler unit case 30 by the blower motor 34 passes through the evaporator 24 which is a cooling heat exchanger. At this time, the air conditioner switch 85 was turned on,
When the refrigerant circuit B is operating, the air passing through the evaporator 24 is cooled. The air that has passed through the cooler unit case 30 flows into a heater unit case 40 provided downstream thereof. In the heater unit case 40, the positions of the air mix dampers 41 and 42 and the bypass damper 70 adjusted by the temperature adjusting lever 83 cause the inlet 12
a, the opening degree of the discharge port 12b and the opening 45 is set, the temperature is determined according to the amount of air passing through the heater core 12, and the air passes through the upstream part of the opening 45 to the ventilation duct 71. I will Thereafter, the air-conditioned air that has passed through the above air conditioning equipment is sent from each opening in the heater unit case 40 to each air outlet in the vehicle compartment by each damper opened and closed by an air outlet switching lever 82 that switches the mode of the air outlet. Be guided. A) In the vent mode The opening 43 is closed by the defroster damper 50, the opening 44 is closed by the heat damper 60, and the ventilation outlet 72 is opened by the ventilation damper 75. Therefore, the conditioned air that has flowed into the heater unit case 40 is guided to the ventilation duct 71, and is blown into the vehicle interior through the ventilation outlet 72 that communicates with the duct. A) In bi-level mode, the opening 43 is closed by the defroster damper 50,
The opening 44 and the ventilation outlet 72 are opened by a heat damper 60 and a ventilation damper 75, respectively. Therefore, the conditioned air flowing into the heater unit case 40 is guided to the ventilation duct 71 and the foot heating duct 65, and is blown into the vehicle cabin from the ventilation outlet 72 and the foot outlet 68 communicating with the respective ducts. . C) In the heat mode The opening 43 is closed by the defroster damper 50, the ventilation outlet 72 is closed by the ventilation damper 75, and the opening 44 is opened by the heat damper 60. Therefore, the conditioned air flowing into the heater unit case 40 is guided to the foot heating duct 65, and is blown into the vehicle cabin from the foot outlet 68 communicating with the duct. D) In the defroster & heat mode, the ventilation outlet 72 is a ventilation damper.
The opening 43 and the opening 44 are opened by the defroster damper 50 and the heat damper 60, respectively. Accordingly, the conditioned air flowing into the heater unit case 40 is guided to the defroster duct 57 and the foot heating duct 65, and is blown into the vehicle cabin through the defroster outlet 56 and the foot outlet 68 communicating with the respective ducts. E) In the defroster mode While the opening 44 and the ventilation outlet 72 are closed by the heat damper 60 and the ventilation damper 75, the opening 43 is opened by the defroster damper 50. Accordingly, the conditioned air flowing into the heater unit case 40 is guided to the defroster duct 57, and is blown into the vehicle cabin through the defroster outlet 56 communicating with the duct. When the defroster damper 50 rotates into the heater unit case 40 in the defroster mode, the distal end portion of the defroster damper 50 contacts the rib 61a of the heat damper 60 via the packing 55 as shown in FIG. Therefore, the defroster damper 50 is stable and does not generate vibration. Further, the heat damper 60 is provided with a torque in the left rotation direction as shown in FIG. 2 from the defroster damper 50 abutting on the rib 61a, and this torque acts in a direction to close the heater unit case 40. The airtightness with the heater unit case 40 is improved. As described above, according to the present embodiment, in the defroster mode, that is, when the defroster damper 50 opens the opening 43 and the heat damper 60 closes the opening 44, the vibration of the defroster damper 60 is prevented and the stability is improved. The airtightness between the heat damper 60 and the opening 44 can be improved. FIG. 6 shows a second embodiment. In the present embodiment, a type of damper is used in which the rotating shafts 52a and 62a are provided at the ends of the defroster damper 50 and the heat damper 60, respectively, and are sealed only from the inner surface of the heater unit case. As shown in FIG. 6, a guide plate is provided on the heat damper 60 against which the defroster damper 50 rotates.
69 is provided, and packing 55 is provided at the contact portion of the defroster damper 50. In the above embodiment, both the defroster damper and the heat damper are provided on the opposite surfaces of the heater unit case. However, depending on the shape of the heater unit case, it is not necessary to provide them on the opposite surfaces. What is necessary is just to rotate and accommodate in a case. Further, the tip of the defroster damper does not necessarily have to abut on the heat damper, but a projection may be provided near the tip of the defroster damper, and may be in contact with a rib or a guide plate of the heat damper via the projection.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a configuration diagram schematically showing a vehicle air conditioner of the present invention;
2 and 3 are a side sectional view and a plan view showing a configuration of a first embodiment of a heater unit of the present invention. FIG. 4 is a front view showing an operation panel of a vehicle air conditioner of the present invention. The figure is a schematic perspective view showing the contact state of the damper of the heater unit,
FIG. 6 is a side sectional view showing the configuration of a second embodiment of the heater unit of the present invention. In the figure, 30 ... cooler unit case, 40 ... heater unit case, 50 ... defroster damper, 60 ... heat damper.

Claims (1)

(57) [Claims] A heater unit case (40); a first opening (43) provided in the heater unit case (40) for blowing air into the vehicle interior; and a heater unit case (40) provided in the heater unit case (40) for supplying air into the vehicle interior. A second opening (44) for blowing out, and a first damper (50) rotatably provided in the heater unit case (40) for opening and closing the first opening (43).
A second damper (60) rotatably provided in the heater unit case (40) and opening and closing the first opening (44).
The first damper (50) is arranged such that the first damper (50) has the first opening (43) open and the second damper (6)
When the second opening (44) is open, the second opening (44) comes into contact with the second damper (60) and closes the second opening (44) with respect to the second damper (60). A vehicle air conditioner configured to apply a directional force. 2. The first opening (43) is provided with a defroster outlet (56).
An opening for guiding conditioned air to the second opening (44).
2. The vehicle air conditioner according to claim 1, wherein the opening is an opening for guiding conditioned air to a foot outlet (68).