JP2001047845A - Vehicular air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a large amount of air when cooling power or heating power is maximized. SOLUTION: For exhibiting the ventilative ability of a ventilating duct 11 to the maximum extent, a heater core 13 is formed movable and an air mix damper is eliminated. When cooling power is maximized, the heater core 13 is evacuated from a ventilating passage so as to reduce ventilating resistance. When heating power is maximized, the heater core 13 is widened to the whole surface of the ventilating passage of the ventilating duct 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner for a vehicle, and more particularly, to an air conditioner for a vehicle in which a heat exchanger for heating is provided in a ventilation duct for sending air into the vehicle interior to regulate the temperature of air blown into the interior of the vehicle. Related to the device.

[0002]

2. Description of the Related Art As shown in FIG. 9, an air-mix type air conditioner mounted on an automobile has a ventilation duct 101, a blower fan 103, an evaporator 104, an air mix damper 105, a heater core 106, and a blower. Exit switching damper 107
And an air outlet 108. The air mix damper 105 is fixed to the upstream side of the heater core 106 in the ventilation duct so as to be rotatable between 105a and 105b. Fig. 9 (a)
FIG. 9 shows that the air mix damper 105 is in the state of 105a and FIG.
(b) is in the state of 105b, and FIG. 9 (c) is in the state of 105c.

[0003] When the blower fan 103 rotates, an air flow Q is generated in the ventilation duct 101, and the air flow Q is cooled by passing through the evaporator 104, thereby generating cool air R.
In FIG. 9A, all the cool air R passes through the ventilation duct 101.
In FIG. 9B, all the cold air R passes through the heater core 106,
When heated, it becomes hot air S. In FIG. 9C, a part of the cold air R passes through the heater core 106 and is heated to become the hot air S. This hot air S is supplied by the cold air R that does not pass through the ventilation duct 101.
Then, an air-fuel mixture T is formed in the ventilation duct 101. In either case, the air outlet switching dampers 15 and 16 are used to switch which of the vent air outlet 17a, the differential air outlet 17b, and the lower air outlet 17c blows air into the vehicle interior. Air is pumped from 108.

In FIG. 9A, the airflow Q does not pass through the heater core, so that the cooling intensity is the highest (hereinafter, referred to as "maximum cooling"). FIG. 9B shows that the heating intensity is the highest (hereinafter, referred to as “maximum heating”) because all the airflow Q passes through the heater core. As shown in FIG. 9C, the temperature of the air-fuel mixture T can be easily adjusted by switching the position of the air mix damper 104.

[0005]

In the case of the maximum cooling shown in FIG. 9 (a), the air mix damper 105 controls the heater core 1 so that the cool air R does not flow into the heater core 106.
06 will be covered. Then, the air passage is blocked only in the portion of the heater core 106 in the ventilation duct 101, so that the ventilation resistance increases, and the amount of the cool air R passing through the ventilation duct 101 decreases. At this time, the ventilation capacity of the original ventilation duct 101 cannot be fully utilized. As a result, there is a problem that the temperature in the passenger compartment cannot be rapidly lowered even during the maximum cooling.

In the case of the maximum heating shown in FIG. 9B, the air mix damper 105 forms a flow path in the ventilation duct 101 so that all the air passes through the heater core.
At this time, since only a portion corresponding to the area of the heater core 106 can be used as the flow path, the ventilation resistance increases and the amount of hot air S decreases as in the case of the maximum cooling. That is, also at this time, the original ventilation capacity of the ventilation duct 106 cannot be fully utilized. As a result, the temperature in the vehicle compartment cannot be rapidly increased even during the maximum heating.

It is an object of the present invention to provide a vehicle air conditioner that can suppress an increase in ventilation resistance.

[0008]

According to the present invention, there is provided an air conditioner for a vehicle, comprising: a duct forming an air passage; and an air flow generator for generating an air flow passing through the duct. A heating heat exchanger for heating the airflow, and a heating heat exchanger displacement mechanism for displacing the heating heat exchanger to change the amount of airflow passing through the heat exchanger. I do.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a vehicle air conditioner according to the present invention will be described below with reference to the drawings.

The vehicle air conditioner of the present embodiment is used as an air conditioner for an automobile. The vehicle air conditioner according to the present embodiment includes an air conditioning mechanism, a rotation mechanism, and a water supply mechanism.

As shown in FIG. 1, the air conditioning mechanism includes a ventilation duct 11 forming an air passage, an evaporator 12 as a cooling heat exchanger, a heater core 13 as a heating heat exchanger,
An outlet switching damper 1 constituting a mechanism for switching the outlet
5, 16 and the air outlet, which is an air passage that sends air into the cabin
17 is provided.

In the ventilation duct 11, an air flow A is generated by rotation of a blower fan (not shown) which is an air flow generator. An evaporator 12 is fixed at the most upstream of the flow path of the air flow A in the ventilation duct 11 in a state of intersecting with the air flow A, for example, vertically. Downstream of the evaporator 12,
A square heater core 13 is provided. Heater core 13
Is provided with a rotating shaft 14 on one side thereof, and is rotatably fixed in the ventilation duct 11. The ventilation duct 11 includes a storage portion 11a for storing the heater core 13. The evaporator 12 allows the air flow A to pass therethrough, and the air flow A passing through the evaporator 12 becomes the air flow B
(Cold air). When the evaporator 12 is not operating, the air flow A is not cooled. In this case, airflow B is at the same temperature as airflow A. The heater core 13
From the non-intersecting state 13a accommodated in the accommodating portion 11a, it can be rotated by the torque given from the rotating mechanism, and the angle at which it intersects the airflow B can be changed. Then, the entire intersection state 13b intersecting with the air flow B in the air passage, and the air flow B
And the non-intersecting state 13a where the intersection angle with the minimum (for example, 0). An outlet switching damper 1 downstream of the heater core 13
5,16 are arranged. The air outlet switching dampers 15 and 16 switch which of the vent air outlet 17a, the differential air outlet 17b, and the lower air outlet 17c blows air into the vehicle interior, and the air is blown out from the air outlet 17. .

A pipe (not shown) for circulating hot water as a heat medium supplied by a water supply mechanism passes through the inside of the heater core 13. As with the evaporator 12, the air flow B can pass through the heater core 13. When passing through the heater core 13, the airflow B exchanges heat with the hot water flowing in the pipe to become hot air C. The heater core 13 is turned around a turning shaft 14 by a turning mechanism, and is angularly displaced with respect to the flow path. The range of angular displacement is a range from the non-intersecting state 13a stored in the storage section 11a of the ventilation duct 11 to the fully intersecting state 13b of the heater core 13. The heater core 13 can take any angle therebetween.
By the angular displacement of the heater core 13 itself, the flow rate of the airflow B passing through the inside is changed, and the temperature of the hot air can be adjusted. Further, when in the non-intersecting state 13a, the heater core 13 is retracted from the flow path, and the ventilation resistance by the heater core 13 is minimized.

Next, the rotation mechanism will be described with reference to FIGS.
This will be described with reference to FIG. The rotation mechanism is provided outside the ventilation duct 11 and has a drive motor 41 that generates torque, and a power transmission mechanism that transmits the torque to the heater core 13. The power transmission mechanism further includes a gear 42, a circular movable-side member 43, and a drive shaft that transmits rotation of the drive motor 41 to the gear 42.
45. The movable member 43 is integrated with the rotating shaft 14 and is rotatably supported by the ventilation duct 11.
The movable side member 43 forms a gear 43a along the circumference for rotation, and meshes with the gear. However, the gear 43a
It may be attached separately. Further, the power transmission mechanism is not limited to a gear, and a belt may be used.

The water supply mechanism will be described with reference to FIGS. The water supply mechanism includes a heat source (engine) (not shown) outside the ventilation duct 11 and a heater core 13 for radiating heat.
And a connecting portion that connects the two in a relatively displaceable state. The joints are fixed pipes 31 and 32 and fixed pipe 3
Thick circular fixed side member 35 into which 1 and 32 are inserted, and movable side member
43, a packing 50 between the fixed side member 35 and the movable side member 43, which is a watertight holding member for preventing leakage of hot water.
And the hot water sent from the fixed side pipe into the heater core
And movable side pipes 33 and 34 for supplying the inside of the pipe 13.

The fixed-side pipes 31, 32 and the movable-side pipes 33, 34
Have their ends connected at a joint. Each pipe 31, 32, 3
3, 34 have an open end face facing the joint.

The fixed-side member 35 has an arc-shaped groove 37 on a surface facing the movable-side member 43, the arc-shaped groove 37 corresponding to a trajectory of the end faces 33a and 34a of the movable-side pipe. At one end of each arc-shaped groove 37, a through hole 36 having the same shape as the fixed-side pipes 31, 32 is provided for inserting the pipes. The through hole 36 is located at a target position with respect to the center of the circle. The edge of the arc-shaped groove 37 of the fixed side member 43 is provided with a packing fixing groove 38 for preventing the packing 50 from shifting. The packing 50 is arranged to be fitted in the groove 38.

The movable-side member 43 has two through holes 45 having the same shape as the movable-side pipes 33 and 34 for inserting the pipes. The through-holes 45 are located symmetrically with respect to the center of the gear.

Next, the operation of the rotating mechanism will be described.

When the drive motor 41 generates torque, the torque is transmitted to the gear 42 via the drive shaft 45. gear
When the 42 rotates, a torque is transmitted to the movable side member 43 by a gear 43a at a circumferential portion of the movable side member 43 meshing with the rotation. As a result, the heater core 13 rotates around the rotation shaft 14 in the ventilation duct 11 and is angularly displaced with respect to the flow path. By the angular displacement of the heater core 13 itself, the amount of air passing through the heater core 13 is changed, and the temperature of the air-fuel mixture D can be adjusted.

At the time of maximum cooling, the heater core 13 is in the non-intersecting state 13a completely retracted from the flow path of the airflow B. At this time, the ventilation duct 11
The ventilation resistance is smaller than when a flow path is formed inside. Therefore, all the air passages in the ventilation duct 11 can be utilized, and a large air volume can be obtained.

At the time of the maximum heating, the heater core 13 is in the full intersection state 13b. Thereby, all the airflows B passing through the ventilation duct 11 pass through the heater core 13. In this case, although there is ventilation resistance due to the heater core 13, an increase in ventilation resistance is suppressed as compared with the case where a flow path is formed in the ventilation duct 11 by the air mix damper. Therefore,
All the air passages in the ventilation duct 11 can be utilized, and a large air volume can be obtained.

Next, the operation of the water supply mechanism will be described.

Hot water is supplied from the fixed pipe 31 and flows into the heater core 13 through the movable pipe 33. Then, the warm water circulating in the heater core 13 and performing heat exchange is
It is discharged through the movable pipe 34 and the fixed pipe 32.

In the non-crossing state 13a and the full crossing state 13b,
The attitude of the heater core 13 and the supply of hot water will be described with reference to FIGS.

FIG. 5A shows that the heater core 13 is in the non-intersecting state 13a.
It is. At this time, the fixed side pipe 31 and the movable side pipe 33
Are connected to each other via a space surrounded by the fixed-side member 35, the movable-side member 43, and the packing 50. Hot water is supplied to the heater core 13 from the fixed-side pipe 31. The movable-side pipe 34 and the fixed-side pipe 32 are similarly connected, and hot water is discharged from the heater core 13 to the fixed-side pipe 32.

FIG. 5B shows the full intersection state 13b. At this time, similarly to the case of the non-intersecting state 13a, the fixed-side pipe 31,
The pipe 32 and the movable pipes 33 and 34 communicate with each other, and hot water flows through the same path. However, at this time, the end faces 31a and 32a of the fixed-side pipes 31 and 32 are
Since the water flows substantially toward the heater cores 13a and 34a, the resistance of flowing water for feeding the hot water to the heater core 13 is small. Therefore, the hot water circulates through the heater core 13 and the temperature of the heater core 13 can be efficiently maintained at a high temperature.

In the non-intersecting state 13a, the cooling intensity is the highest. Therefore, the temperature of the airflow B (cold air) is preferably lower. In the non-intersecting state 13a, the heater core 13
Is retracted from the flow path, so that the air flow B
Do not pass through 13. However, even in this case, since the heater core 13 radiates heat, heat exchange is performed without the airflow B passing through the heater core 13. As a result, airflow B (cold air)
Will be warmed and the efficiency of cooling will drop slightly. Therefore, it is necessary to suppress the temperature rise of the heater core 13. For this purpose, it is preferable to stop the circulation of hot water. For this purpose, the arc-shaped groove 37 of the fixed-side member 35 may have a shape as shown in FIG. 6 so that hot water does not flow through the heater core 13 when the heater core 13 is in the storage posture.

As shown in FIG. 6A, a structure in which the arc-shaped groove 37 does not exist at one position of the limit of the angular displacement of the heater core 13 is adopted. When this is used, the end faces 33a and 34a of the movable-side pipe are in a position where the arc-shaped groove 37 does not exist in the non-intersecting state 13a. In this case, the heater core
When 13 is in the non-intersecting state 13a, the movable side pipes 33, 34
Hot water is less likely to flow.

Further, as shown in FIG. 6 (b), if a new packing 51 is provided in a portion where the arc-shaped groove 37 does not exist, the communication between the fixed side pipes 31, 32 and the movable side pipes 33, 34 is cut off. The flow of hot water stops completely.

FIG. 6C shows a shape in which the width of the arc-shaped groove 37 is reduced from one end to the other end. The movable side pipes 33 and 34 are configured to come to one end having a large width. In this case, the heater core 13 is moved from the full cross state 13b to the non-cross state 1
When gradually changed to 3a, the resistance of flowing hot water flowing into the heater core 13 gradually increases, and the flow of hot water becomes difficult. When the heater core 13 enters the non-intersecting state 13a, the inflow and outflow of the hot water almost stops. This allows
In accordance with the heating intensity, the flow rate of the hot water circulating through the heater core 13 can be adjusted so as to gradually increase or decrease.

Next, FIG. 7 shows a second embodiment of the vehicle air conditioner according to the present invention.

The vehicle air conditioner according to the second embodiment has a
As in the first embodiment, this is used as an air conditioner for a vehicle. As in the first embodiment, a ventilation duct 11 that forms an air passage, an evaporator 12 that is a heat exchanger for cooling, and a heater core 13 that is a heat exchanger for heating,
An outlet switching damper 1 constituting a mechanism for switching the outlet
5, 16 and the air outlet, which is an air passage that sends air into the cabin
17 is provided.

In the present embodiment, unlike the first embodiment, the rotation axis arranged along one side of the rectangular heater core 13 is shifted to the center. Further, a rotation mechanism and a water supply mechanism similar to those of the first embodiment are provided outside the ventilation duct 11,
It turns around the turning shaft 18. Thereby, the heater core 13
Adjusts the amount of air that is angularly displaced with respect to the flow path and passes through the heater core 13, thereby enabling adjustment of the temperature blown into the vehicle interior.

Here, the rotating shaft 18 may be parallel to a diagonal line of the heater core 13. In any of the embodiments, a configuration without the evaporator 13 is also possible. In that case, the air conditioner does not have a cooling function. Further, in the above-described embodiment, the heater core 13 has a posture in which the ventilation resistance is reduced in the ventilation blower 11, but is not limited thereto. That is,
Any posture may be used as long as the heater core 13 takes a posture that reduces the ventilation resistance of the air passage during the maximum cooling. For example, a mechanism may be used in which the heating heat exchanger is made to protrude and retract in the ventilation duct so as to be variable in projection amount.

The water supply mechanism does not have to be configured as in the present embodiment. For example, the water supply mechanism may be configured to connect the fixed-side pipe and the movable-side pipe with flexible connecting pipe members. As the flexible connecting pipe member, as shown in FIG. 8A, pipes 53 and 54 made of an elastic material, for example, rubber are used. Further, an extendable connecting pipe member may be used. As the extendable connecting pipe member, for example, a bellows 55 can be used as shown in FIG.

[0037]

According to the present invention, it is possible to provide an air conditioner for a vehicle capable of obtaining a large air flow during maximum cooling or maximum heating.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of an overall configuration according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram of a swing mechanism according to the first embodiment of the present invention.

FIG. 3 is an explanatory diagram of a water supply mechanism in the first embodiment according to the present invention.

FIG. 4 is an exploded perspective view of a water supply mechanism according to the first embodiment of the present invention.

FIG. 5 is a perspective view of a water supply mechanism according to the first embodiment of the present invention.

FIG. 6 is an explanatory diagram of a fixed-side member according to the first embodiment of the present invention.

FIG. 7 is an overall configuration diagram according to a second embodiment of the present invention.

FIG. 8 is an explanatory view of a modification of the water supply mechanism according to the present invention.

FIG. 9 is an explanatory diagram of a vehicle air conditioner according to the related art.

[Explanation of symbols]

11 ... ventilation duct, 12 ... evaporator, 13 ... heater core,
14 ... rotating shaft, 31, 32 ... fixed side pipe, 33, 34 ... movable side pipe, 35 ... fixed side member, 42 ... gear, 43 ... movable side member, 50 ...
Packing.

Claims (8)

[Claims] 1. An air conditioner mounted on a vehicle, a duct forming an air passage, an air flow generator generating an air flow passing through the duct, and a heating heat exchanger for heating the air flow. An air conditioner for a vehicle, comprising: a heating heat exchanger displacement mechanism that displaces the heating heat exchanger to change the amount of airflow that passes through the heat exchanger. 2. The vehicle air conditioner according to claim 1, wherein the heating heat exchanger displacement mechanism has a mechanism that changes an intersection angle between the heating heat exchanger and an air flow. Air conditioner. 3. The vehicle air conditioner according to claim 1, further comprising a mechanism for restricting heating of the heating exchanger by a heat medium, wherein the mechanism has a minimum crossing angle. A maximum air conditioner performs a maximum restriction at the time of. 4. The air conditioner for a vehicle according to claim 2, wherein the heat exchanger for heating is supplied from outside the air conditioner for the vehicle and circulates in the heat exchanger for heating. The heated air is heated using the discharged hot water as a heat medium, and the supply of the hot water is stopped when the intersection angle is minimum. 5. An air conditioner mounted on a vehicle, a duct forming an air passage, an air flow generator for generating an air flow passing through the duct, and a heating heat exchanger for heating the air flow. And a heating heat exchanger retreat mechanism for retracting the heating heat exchanger so as not to intersect with the air flow. 6. The air conditioner for a vehicle according to claim 5, further comprising a mechanism for restricting heating of the heating exchanger by a heat medium, wherein the mechanism is provided when the heating exchanger is retracted. ,
An air conditioner for a vehicle, wherein a maximum limit is imposed. 7. The vehicle air conditioner according to claim 5, wherein the heating heat exchanger is supplied from outside the vehicle air conditioner and circulates in the heating heat exchanger. The vehicle air conditioner is further characterized in that the heated water is heated using the discharged hot water as a heat medium, and the supply of the hot water is stopped when the heated heat exchanger is retracted to the heating heat exchanger retreat mechanism. 8. The vehicle air conditioner according to claim 1, further comprising a cooling heat exchanger for cooling the air flow.