JPH085306B2 - Vehicle air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a first bypass air passage for bypassing a heater and a second bypass air passage for bypassing the heater and the first bypass air passage.
By providing a bypass air passage, the air heated by the heater is mixed with the air that has passed through the first bypass air passage to adjust the temperature of the air, and the second bypass air passage is opened, whereby the vehicle interior The present invention relates to a vehicle air conditioner having a function of increasing the amount of air discharged to the vehicle.

[Prior Art] Conventionally, this type of air conditioner is provided with a plate-shaped air mix damper capable of closing one of the air passages upstream of the heater and upstream of the first bypass air passage. By operating the rotating position of the air mix damper, the ratio of the air volume heated by the heater to the air volume bypassing the heater is adjusted to adjust the temperature of the air discharged from the duct into the passenger compartment. Was there.

On the other hand, for example, in the case of rapidly cooling the vehicle interior, there is a case where a larger air volume than the air outlet in the vehicle interior is required.
Therefore, a plate-shaped Max Cool damper that can close the second bypass air passage while providing a second bypass air passage for supplying the air upstream of the heater and the first bypass air passage to the air outlet in the vehicle compartment is provided. When a large air volume is required, the air mix damper closes the air passage passing through the heater to fully open the first bypass air passage, and further,
The Max Cool damper is rotated to open the second bypass air passage, and air is supplied to the discharge port in the vehicle compartment through the first bypass air passage and the second bypass air passage.

[Problems to be Solved by the Invention] However, the conventional device requires a drive unit that drives the air mix damper and a drive unit that drives the MaxCool damper, and also requires the air mix damper and the MaxCool damper. Since the interlocking mechanism was used, there was a problem that the structure became complicated.

The present invention has been made in view of the above circumstances, and an object thereof is a vehicle capable of performing a simple structure of adjusting an opening ratio of a heater and a first bypass passage and opening and closing a second bypass air passage. In the provision of an air conditioner for use.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a duct for sending air toward a passenger compartment, and a duct provided in the duct for heating an air flow flowing in the duct. And a first bypass air passage for supplying the air flow flowing in the duct to the downstream side of the heater while avoiding the heater, and to the upstream side of the heater and the first bypass air passage. A second bypass air passage that supplies the supplied air to the heater and the first bypass air passage by bypassing the heater and the first bypass air passage, and is disposed in the duct,
A flexible film-shaped member having an opening capable of opening one or a plurality of air passages that pass through the heater, the first bypass air passage, and the second bypass air passage. ,
The technical means comprises a film member moving means for moving the film member in the duct.

[Operation] Since the flexible film member is used, one film member should block the air passage passing through the heater, the first bypass air passage, and the second bypass air passage. Is possible. Since the film-shaped member is provided with an opening that can open one or a plurality of air passages that pass through the heater, the first bypass air passage, and the second bypass air passage, By moving the film member in the duct by the film member moving means, the opening ratio between the air passage passing through the heater and the first bypass air passage can be adjusted, and the opening and closing of the second bypass air passage can be performed. It can be done in conjunction.

EFFECTS OF THE INVENTION According to the present invention, the adjustment of the opening ratio of the air passage passing through the heater and the first bypass air passage and the opening / closing of the second bypass air passage are linked by one film member. Since the opening and closing control is performed by interlocking two of the conventional air mix damper and max cool damper, the operating force of the damper can be reduced and the damper drive mechanism can be performed. Can be simple. As a result, not only can the number of parts of the device be greatly reduced, the weight and size of the device can be reduced, and the manufacturing cost can be reduced, but also the potential failure probability and the like can be reduced.

[Embodiment] Next, a vehicle air conditioner of the present invention will be described based on an embodiment shown in the drawings.

FIG. 1 shows a schematic view of a heating unit of a vehicle air conditioner. A cooling unit (not shown) is provided on the upstream side of the heating unit 1. This cooling unit has an inside / outside air switching mechanism (not shown) that selectively takes in air inside the vehicle and air outside the vehicle, and a blower (not shown) that generates an air flow toward the inside of the vehicle. Is provided.

Inside the duct of the cooling unit, a cooler (not shown) including a refrigerant evaporator of the refrigeration cycle is provided, and the air flow generated by the blower passes through the cooler and then the duct of the heating unit 1. 2 is provided so as to flow into the inside.

The heating unit 1 is provided with a temperature adjusting section 3 on the upstream side, and is provided on the downstream side thereof with an outlet switching mechanism 4 for supplying the air whose temperature is adjusted by the temperature adjusting section 3 to each section in the vehicle interior. .

 Next, the temperature control unit 3 will be described.

On the rear surface side (upper side in FIG. 1) in the duct 3, a heater core 5 which is a heater of the present invention which receives heat of engine cooling water (warm water) and generates heat is arranged. The heater core 5 heats the air passing through the inside and supplies the air to the blower outlet switching mechanism 4 downstream thereof. Further, on the front side (lower side in FIG. 1) of the heater core 5 in the duct 2, a first bypass air passage 6 that bypasses the heater core 5 and supplies the blower outlet switching mechanism 4 is provided. further,
On the front surface of the duct 2 on the upstream side of the first bypass air passage 6, the air upstream of the heater core 5 and the first bypass air passage 6 passes through the three-way branch duct 7 described below. 2 Bypass air passage 8 is provided.

Further, inside the duct 2, an endless flexible film-like member (hereinafter referred to as a film damper) 9 made of, for example, polyethylene resin is arranged as shown in FIGS. 5 and 6. The film damper 9 is movably supported in the duct 2 by the support frame 10 shown in FIG. 5, and the film damper 9 is disposed upstream of the heater core 5, the first bypass air passage 6, and the first bypass air passage 6. 2 The bypass air passage 8 is arranged so that it can be closed.

The film damper 9 includes a first opening 11 and a second opening 12.
It has two openings. The first opening 11 allows the airflow supplied from the cooling unit to pass through the film damper 9
The second opening 12 is provided upstream of the heater core 5, the first bypass air passage 6, and the second bypass air passage 8 in order to guide the inside.
Is selectively opened by moving the film damper 9.

As shown in FIG. 5, the supporting frame 10 has a shape corresponding to the upstream side of the heater core 5, the first bypass air passage 6 and the inner shape of the duct 2, and is arranged on the upper surface and the bottom surface of the duct 2. The frame bodies 13 and 14 are provided. A drive shaft 15 that supports the film damper 9 from the inner circumference and drives the film damper 9 is rotatably supported at the upstream corners of the frames 13 and 14. Gears 17, 18 are provided at both ends of the drive shaft 15 so as to mesh with a large number of meshing holes 16 provided at the both ends of the film damper 9. Further, in the corner portions on the downstream side of the frame bodies 13 and 14,
A driven shaft 19 is rotatably supported. At both ends of the driven shaft 19, a gear 20 that meshes with the meshing hole 16,
21 are provided.

In addition, columns 22, 23, and 24 that support the film damper 9 from the inner periphery are provided at the other corners,
Posts 25 and 26 that support the outer surface of the upstream film damper 9 of the heater core 5 are provided.

In addition, the upstream of the heater core 5, the first bypass air passage 6,
The second bypass air passage 8 is provided with lattices 27, 28, 29 for preventing the film damper 9 from being deformed by wind pressure. Further, as shown in FIG. 6, the inner surface of the opening of the second bypass air passage 8 closes the gap between the duct 2 and the film damper 9, and is a seal packing 30 made of a porous resin such as a caletane foam. Is pasted.

As shown in FIG. 6, a shaft drive mechanism 31 that rotationally drives the drive shaft 15 is provided on the upper surface of the duct 2. The shaft drive mechanism 31 includes a protrusion 33 that is inserted into an insertion hole 32 provided at the upper end of the drive shaft 15 through a hole (not shown) provided on the upper surface of the duct 2 and rotates integrally with the drive shaft 15. It has a pinion 34. The pinion 34 meshes with the outer periphery of a fan-shaped drive plate 35 rotatably supported on the upper surface of the duct 2. The drive plate 35 is a temperature adjusting lever provided on an air conditioning control panel 37 shown in FIG. 7 via a wire 36.
The drive plate 35 is connected to the drive plate 38 and operates the drive plate 35 remotely according to the set position of the temperature control lever 38.

The support frame 10 and the shaft drive mechanism 31 constitute the film member moving means 39 of the present invention.

In addition to the temperature control lever 38, the air conditioning control panel 37 of the present embodiment includes a fan switch 40 for starting the blower and setting the amount of blown air, an inside air / outside air selection lever 41, a cooler switch 42, an outlet. A selection lever 43 is provided.

 Next, the outlet switching mechanism 4 will be described.

The blower outlet switching mechanism 4 is provided downstream of the temperature control unit 3, and as shown in FIG. 8, the defroster blower outlet 44, the vent blower outlet 45, and the heater blower outlet are provided on the upper surface, front surface, and bottom surface of the duct 2. Exit 46 is open.

A defroster duct 48 that blows the air in the duct 2 supplied downstream of the temperature control unit 3 onto the windshield 47 is attached to the defroster outlet 44. Also, vent outlet
The 45 is provided with a three-way branch duct 7 that discharges the air supplied into the duct 2 downstream of the temperature control unit 3 from the center of the instrument panel 49 and both sides to the vicinity of the chest of the vehicle occupant.

This three-way branch duct 7 communicates with the second bypass air passage 8 in addition to the vent outlet 45, and when the second bypass air passage 8 opens, it is located upstream of the heater core 5 and the first bypass air passage 6. The air is supplied into the vehicle compartment while avoiding the heater core 5 and the first bypass air passage 6.

The heater outlet 46 has a duct 2 downstream of the temperature control unit 3.
A heater nozzle 50 is provided to blow the air supplied into the vicinity of the feet of the vehicle occupant.

The opening / closing operation of the defroster outlet 44, the vent outlet 45, and the heater outlet 46 of this embodiment is performed by a film damper 51 provided in the duct 2 and having a plurality of openings. This film damper 51 is a film drive gear 5
2. The position of the opening of the film damper 51 is remotely controlled by interlocking with the outlet selection lever 43 of the air conditioning control panel 37 via the pinion 53 and the plate 54.

 Next, the operation of the air conditioner of the above embodiment will be described.

The fan switch 40 on the air conditioning control panel 37
When turned on, the inside air or the outside air selected by the inside / outside air switching mechanism is supplied into the duct of the cooling unit.
At this time, if the cooler switch 42 is turned on, the air supplied into the duct of the cooling unit is cooled when passing through the cooler. The air that has passed through the cooler flows into the duct 2 of the heating unit 1, and the temperature is adjusted by the temperature adjusting unit 3. Then, the temperature-controlled air is blown out from the outlet selected by the outlet selection lever 43.
It is discharged into the passenger compartment.

 Here, the operation of the temperature control unit 3 will be described.

In this embodiment, it is assumed that the engine cooling water is always supplied into the heater core 5.

a) When the temperature control lever 38 is set to the heat mode position A at the right end of FIG.

A temperature control lever 38 moves the drive plate 35 via the wire 36 to the position shown in FIG. I.e. the pinion
The film damper 9 is the first through the drive shaft 15
It is set to the position shown in the figure.

In this state, as shown in A of the chart of FIG. 9, the upstream side of the heater core 5 is entirely opened by the second opening 12, and the first bypass air passage 6 and the second bypass air passage 8 are formed.
However, it is blocked by the film damper 9.

Therefore, the air flowing into the film damper 9 through the first opening 11 passes only through the heater core 5, is heated, and is supplied to the downstream outlet switching mechanism 4. Then, hot air is discharged into the vehicle compartment from the air outlet set by the air outlet switching mechanism 4.

b) When the temperature control lever 38 is selected to the position B of the air mix mode slightly left from the right end of FIG.

When the temperature adjusting lever 38 is set to the position B in the air mix mode which is slightly left from the position A in the heat mode, the drive plate 35 rotates about 20 ° in the direction of arrow A in FIG.
Then, the binion 34 rotates in the direction of arrow B in FIG.
The film damper 9 is set to the position shown in FIG.

In this state, as shown in B of the chart of FIG. 9, the upstream side of the heater core 5 and the first bypass air passage 6 are each half-opened by the second opening portion 12, and the second bypass air passage 8 is opened.
However, it is blocked by the film damper 9.

Therefore, about half of the air flow that has flowed into the film damper 9 through the first opening 11 passes through the heater core 5 and is heated, and the other half of the air flows through the first bypass air passage 6. After passing, it is supplied to the downstream outlet switching mechanism 4. Then, the air that has been supplied into the outlet switching mechanism 4 and has passed through the heater core 5 and the second bypass air passage 8 is merged and combined, and is discharged into the vehicle compartment from the outlet set by the outlet switching mechanism 4. It

c) When the temperature control lever 38 is selected from the left end of FIG. 7 to the cool mode position C slightly to the right.

When the temperature adjusting lever 38 is set from the heat mode position A to the cool mode position C, the drive plate 35 rotates about 40 ° in the direction of arrow a in FIG. Then, the pinion 34 rotates in the direction of arrow B in FIG. 1, and the film damper 9 is set to the position shown in FIG.

In this state, as shown by C in the chart of FIG. 9, the upstream side of the heater core 5 and the second bypass air passage 8 are blocked by the film damper 9, and only the first bypass air passage 6 has the second opening. The portion 12 opens entirely.

Therefore, the air flowing into the film damper 9 through the first opening 11 passes through only the first bypass air passage 6 without being heated by the heater core 5, and is supplied to the blower outlet switching mechanism 4 on the downstream side. The air is discharged into the vehicle compartment from the air outlet set by the air outlet switching mechanism 4.

d) When the temperature control lever 38 is selected to the position D in the max cool mode at the left end of FIG.

When the temperature adjusting lever 38 is set from the heat mode position A to the max cool mode position D, the drive plate 35 rotates about 60 ° in the direction of arrow B in FIG. Then, the pinion 34 rotates in the direction of arrow B in FIG. 1, and the film damper 9 is set to the position shown in FIG.

In this state, as shown by D in the chart of FIG. 9, the upstream side of the heater core 5 is blocked by the film damper 9, and the first bypass air passage 6 and the second bypass air passage 8 have the second opening 12. Open all over.

Therefore, about half of the air flowing into the film damper 9 through the first opening 11 passes through the first bypass air passage 6 and is supplied to the outlet switching mechanism 4 on the downstream side.
Is discharged into the vehicle compartment from the air outlet set by. The other half of the air flowing into the film damper 9 through the first opening 11 passes through the second bypass air passage 8 and is supplied to the three-way branch duct 7, and the center of the instrument panel 49 and both sides. Is discharged near the chest of the vehicle occupant.

As described above, when the max cool mode is set, in addition to the first bypass air passage 6, the second bypass air passage 8
Also opens, reducing ventilation resistance in the air conditioner,
The amount of air discharged from the air conditioner into the vehicle interior increases.
For this reason, by turning on the cooler switch 42 and setting the temperature adjustment lever 38 to the max cool mode in the summer, it is possible to supply a large amount of air cooled by the cooler of the cooling unit into the passenger compartment. It is possible to cool down the passenger compartment rapidly.

According to the present invention, the amount of air passing through the heater core 5 and the amount of air passing through the first bypass air passage 6 and the amount of air passing through the second bypass air passage 8 are adjusted by using one film damper 9. Since it can be performed by sliding, the operating force of the damper can be reduced compared to the conventional two-plate damper, which is an air mix damper and a max cool damper, which is opened and closed in conjunction with each other. At the same time, the mechanism of the temperature adjusting unit 3 for adjusting the temperature and opening / closing the Max Cool damper can be simplified. This also makes it possible to significantly reduce the number of parts of the mechanism that controls the temperature and opens and closes the Max Cool damper as compared with the conventional one, and it is possible to reduce the weight and size of the air conditioner and reduce the manufacturing cost. Not only that, the potential failure probability can be reduced.

Further, according to the present invention, when the film damper 9 opens and closes the upstream side of the heater core 5, the first bypass air passage 6 and the second bypass air passage 8, the air flow direction and the film damper 9 moving direction. Since the intersection angle with and does not change, the film damper 9 can be smoothly operated with a small operation force.

Further, according to the present invention, the film damper 9 is slid to open and close the air passage, so that the tapping sound of the damper is not generated unlike the conventional plate damper.

Since the film damper 9 can be freely placed inside the duct 2, the duct 2 can be installed in the instrument panel 49.
The duct 2 can be designed to have a flat shape, a polygonal shape, or a cylindrical shape.

(Modification) In the above-described embodiment, in addition to the openings for opening and closing the heater core, the first bypass air passage, and the second bypass air passage in the film member, the air flow is introduced into the film member. Although the example in which the opening is provided is shown, the opening at the side end of the film member is provided so as to communicate with the downstream of the cooling unit so as to supply the air flow into the film member, and the air is supplied into the film member. The opening for supplying the flow may be eliminated. Further, the film member is provided with a plurality of openings for opening and closing the heater, the first bypass air passage, and the second bypass air passage. For example, the second bypass air passage can be opened when the heater core is opened. It may be provided so as to achieve the level mode.

Although the example in which the upstream side of the heater is cut off is shown, it may be provided so as to cut off the downstream side.

Although the example in which the heater core is used as the heater is shown, other heating means such as an electric heater such as a PTC heater may be used.

Although the film member is provided endlessly and the film member is rotated in the duct in the example shown, the film is provided in a strip shape in which both ends are wound by the winding roller, and the film winding member is operated by operating the winding rotors at both ends. The member may be slid in the duct.

In the above-described embodiment, the example in which the seal packing is provided only in the second bypass air passage is shown, but it may be provided in the heater and the first bypass air passage. In addition to sticking the seal packing to the duct side, the seal packing may be provided on the support frame side of the inner circumference of the film member, or an elastic body such as urethane foam may be stuck to the film member to eliminate the seal packing. It may be provided in.

Although the example in which the film-shaped member is used for switching the air outlets is also shown, it may be used for an air conditioner in which the air outlets are switched by a plate-shaped damper.

[Brief description of drawings]

FIG. 1 is a schematic view of a heating unit in which a temperature control unit is set to a heat mode, FIG. 2 is a schematic view of a heating unit in which a temperature control unit is set to an air mix mode, and FIG. 3 is a temperature control unit. FIG. 4 is a schematic view of the heating unit set in the cool mode, FIG. 4 is a schematic view of the heating unit in which the temperature control unit is set in the max cool mode, and FIG. 5 is an exploded perspective view showing the support frame and the film damper. FIG. 6 is a perspective view of the heating unit, FIG. 7 is a schematic view of the outlet switching mechanism, FIG. 8 is a front view of the air conditioning control panel, and FIG. 9 is a heater core at the setting position of the temperature adjusting lever, It is a chart which shows the opening / closing state of a 1st bypass airway and a 2nd bypass airway. 2 ... Duct, 5 ... Heater core, 6 ... First
Bypass air passage, 8 ... Second bypass air passage, 9 ... Film damper (membrane member), 11 ... First opening, 12 ... Second
Opening, 39 ... Membrane member moving means

Claims (2)

[Claims] 1. (a) A duct for sending air toward a passenger compartment, (b) a heater provided in the duct for heating an air flow flowing in the duct, and (c) the duct. A first bypass air passage for supplying an air flow flowing through the heater to the downstream side of the heater, and (d) an air supplied to the heater and the upstream side of the first bypass air passage. And a second bypass air passage that is provided downstream of the heater and the first bypass air passage while avoiding the heater and the first bypass air passage, and (e) is disposed in the duct, and A flexible film-like member having an air passage that passes through a heater, one of the first bypass air passage, and the second bypass air passage, or an opening capable of opening a plurality of air passages; (F) Membrane member moving means for moving the membrane member in the duct The vehicle air conditioner having a. 2. The vehicle air conditioner according to claim 1, wherein both ends of the film-shaped member are connected to each other and provided endlessly.