JP3309946B2 - Outside air intake structure of vehicle heater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a heater for a vehicle such as a cab-over type truck having a radiator provided below a floor panel of a cab. More specifically,
The present invention relates to an external air intake structure for a vehicle heater in which a blow-back preventing plate is attached to the radiator and an external air intake of the heater is provided near the radiator.

[0002]

2. Description of the Related Art Conventionally, an engine of a cab-over type truck is housed in an engine room provided below a floor panel of the cab, and the engine room is covered with a cover to reduce noise of the engine. The cooling of the radiator disposed in front of the engine is driven by the engine and performed by a cooling fan provided between the engine and the radiator. When the cooling fan is operated, an airflow is generated from the front to the back of the radiator, and the cooling water flowing inside the radiator is cooled. The radiator is provided with a blow-back prevention plate protruding toward the periphery thereof, and this blow-back prevention plate is
Since the hot air that has once passed through the radiator is prevented from returning from the vicinity of the periphery of the radiator to the front surface of the radiator, the cooling performance of the radiator is not reduced.

On the other hand, this type of vehicle is equipped with an air conditioner having a built-in cooler unit, a heater and the like to make the interior space of the passenger compartment comfortable. This air conditioner is provided in front of the cab, and takes in outside air or air in the passenger compartment from an intake port to adjust the air conditioner to an optimal temperature condition. Normally, the outside air intake of the heater is provided in the front of the vehicle near the radiator, and the heater has a number of tubes provided at a predetermined interval through which engine coolant flows and a number of fins provided therebetween. And the air sucked from the outside air intake is warmed by passing between the tube and the fins. The air warmed by the heater is guided by a guide tube and is blown out at a blowout port. With such a heater, the occupant can operate in a comfortable temperature environment during traveling even in a relatively cold season.

[0004]

However, in the above-described vehicle, when the outside air temperature becomes extremely low, such as in winter in a cold region, there is a problem that the interior of the vehicle cannot be sufficiently heated even if the heater is driven. In this case, the problem can be solved by sucking the air in the passenger compartment and warming it again by the heater, but when the engine is started, the passenger compartment cannot be heated early because the interior temperature is low as well as the outside air. There is. SUMMARY OF THE INVENTION It is an object of the present invention to provide an external air intake structure for a vehicle heater that can warm the vehicle interior relatively early when the outside air temperature or the temperature inside the vehicle interior is extremely low.

[0005]

The invention according to claim 1 is
As shown in FIG. 1, a heater 21 provided in a vehicle provided with a blow-back preventing plate 31 for preventing a backflow of an airflow passing through the radiator 12 at a periphery of the radiator 12.
Temperature of the outside air taken in from outside air intake 21a
It is an improvement in the outside air intake structure of a vehicle heater configured to be able to blow air into the inside . The characteristic configuration is such that the backflow prevention plate 31 is provided so as to be capable of falling back so as to allow the backflow of the air flow, and the first position where the backflow prevention plate 31 prevents the backflow of the air amount and the first position which allows the backflow of the airflow. a drive means 32, 33 for switching to the second position, the shield plate 31 blowback second
Air intake so that part of the airflow flowing back
The inlet 21a is provided near the radiator 12 .

In this structure for taking in outside air of the vehicle heater,
During traveling without using the heater, the blow-back preventing plate 31 is set to the first position by the driving means 32, 33 to prevent the backflow of the air flow, thereby preventing the cooling performance of the radiator from being lowered. Even when a heater is used, fresh air outside the vehicle is taken in from the air intake 21a to adjust the temperature and warm the inside of the vehicle. When the engine is started when the outside air temperature or the temperature in the vehicle compartment is extremely low, the backflow prevention plate 31 is positioned at the second position by the driving means 32, 33 to allow the backflow of the air flow. A part of the hot air after passing through the radiator 12 makes a U-turn and returns to the front surface of the radiator 12 from the opened blow-back preventing plate 31. A part of the airflow returning to the front of the radiator 12 enters the air intake 21a in a warmed state.

According to a second aspect of the present invention, in the first aspect of the present invention, the driving means includes a lever 33 provided on an operation panel of the heater and a wire cable 32 connecting the lever 33 and the blow-back preventing plate 31. It is an outside air intake structure of the configured vehicle heater. In the outside air intake structure of the vehicle heater, the driver can arbitrarily operate the blowback prevention plate, and can operate in accordance with the driving environment of the vehicle such as the season and the outside air temperature.

According to a third aspect of the present invention, in the first aspect of the present invention, a temperature sensor 41 is provided in the vehicle interior, an actuator 42 is connected to the blow-back preventing plate 31 via a wire cable 43, and the driving means has a temperature sensor. This is an outside air intake structure for a vehicle heater configured to drive an actuator 42 based on a detection output of a sensor 41. In this external air intake structure for a vehicle heater, the temperature sensor 41 operates the blow-back prevention plate 31 via the actuator 42 in accordance with the temperature state in the vehicle compartment, so that the driver manually operates the blow-back prevention plate 31 manually. Can be avoided.

[0009]

Next, a first embodiment of the present invention will be described in detail with reference to the drawings. As shown in FIG. 1, a floor panel 11 of a cab 11 of a cab-over type truck is provided.
The radiator 1 is installed in the engine room provided below
2 and the engine 13 are accommodated. The radiator 12 is disposed at a predetermined distance from the front surface of the engine 13, and a cooling fan 14 driven by the engine 13 is rotatably mounted on the front surface of the engine 13. Is covered by a fan shroud 16 attached to the fan. Radiator 1
Reference numeral 2 includes a radiator core 12a, and a lower tank 12b and an upper tank 12c provided on the lower and upper surfaces of the core 12a.

On the other hand, a front panel 11d forming the front surface of the cab 11 is provided in front of the cab 11. Although not shown, the upper end of the front panel 11d is pivotally connected by a hinge provided below the windshield glass. A dash panel 11b is provided behind the front panel 11d at intervals.
d and the dash panel 11b form an accessory storage chamber. Although not shown, the auxiliary equipment accommodating chamber is provided with an outside air intake 21a for a wiper motor and a heater for heating in addition to devices such as a window washer tank, an engine oil filler, an engine reservoir tank, and a filter 21b in the outside air intake 21a. (FIG. 2) is attached.

A heater 21 for heating the vehicle interior is provided on the back of the dash panel 11b. As shown in FIG.
The heater 21 is provided inside the air conditioner 22, and the air conditioner 22 further includes a cooler unit 23, a blower 24, and the like. The air inlet 23a of the cooler unit 23 communicates with the air outlet 24a of a blower 24 that sends air outside the vehicle or in the passenger compartment to the cooler unit 23 or the heater 21, and the cooler unit 2
The third outlet 23b communicates with the two flow paths 26a and 26b. The heater 21 is provided with a heater core 21c,
The heater core 21c has a large number of tubes (not shown) provided at a predetermined interval through which cooling water for the engine flows, and a large number of fins provided therebetween, and air flows between the tubes and the fins. It is designed to be warmed by passing through. The inlet of the heater 21 communicates with one of the flow paths 26a, and the outlet of the heater 21 merges with the other flow path 26b.
Is formed. Following the outlet 26c, the guide tube 27
Is provided, and the air adjusted by the heater 21 and the cooler unit 23 is connected via a guide pipe 27 to each outlet (not shown) provided inside the vehicle.

Returning to FIG. 1, the radiator 12 is provided with a blow-back preventing plate 31 for preventing a backflow of the airflow passing through the radiator. The blow-back preventing plate 31 is provided so as to be able to fall down via a hinge 31a provided at a lower portion of the floor panel 11a, and falls down as shown by a broken line from a first position for preventing a reverse flow of the air amount, thereby allowing a reverse flow of the air flow. It is configured to A wire cable 32 that opens and closes is connected to the blowback prevention plate, and the other end is connected to an operation lever 33 provided on the instrument panel 15. The operation lever 33 is configured to allow the back-up prevention plate 31 to fall down from the driver's seat side. Reference numeral 34 denotes an air volume adjusting lever.

The operation of the thus constructed external air intake structure for a vehicle air conditioner will be described. When the heater 21 is used during traveling, the operation lever 33 provided on the instrument panel 15 is positioned upward and
1 is located at a first position for preventing the backflow of the air flow, and the heater core 21 takes in the outside air or the air in the vehicle interior by the occupant's option.
After the temperature is adjusted by c, the air is blown into the vehicle to warm the vehicle. Further, when the engine is started when the outside air temperature is extremely low, the operation lever 33 provided on the instrument panel 15 is positioned downward, and the blow-back preventing plate 31 is set to the second position allowing the backflow of the air flow. In this state, the engine 13 is started, and the heater 21 is driven. When the cooling fan 14 is activated by the start of the engine 13, an air flow is generated that escapes from the front to the back of the radiator 12, and a part of the hot air that has passed through the radiator 12 is shown by a solid arrow in FIG. Radiator 1 from U-turn and opened
Return to the front of 2. Part of the airflow returning to the front of the radiator 12 enters the air intake 21 a of the heater 21. This air is already warm because it has already been warmed by passing through the radiator 12, and this already warm air is further efficiently warmed by a heater, and then discharged from an outlet (not shown) to efficiently heat the vehicle interior.

FIG. 3 shows a second embodiment of the present invention.
3, the same reference numerals as those in FIG. 1 indicate the same parts. The outside air intake structure of the vehicle heater has a temperature sensor 4 serving as a driving means below an instrument panel 15 in the vehicle interior.
1 and an actuator 42 are provided, and the actuator 42 and the blow-back preventing plate 31 are connected via a wire cable 43. The detection output of the temperature sensor 41 is input to the actuator 42, and based on the detection output of the temperature sensor 41 equal to or higher than a predetermined temperature, the actuator 42 moves the backflow prevention plate 31 through the wire cable 43 to the first position for preventing the backflow of the air amount. To the second position allowing the backflow of the airflow. Except for the above, the configuration is the same as the outside air intake structure of the vehicle heater according to the first embodiment. In the outside air intake structure of the vehicle heater configured as described above, the blow-back prevention plate 31 is driven by the actuator 42 via the wire cable 43. The actuator 42 of the vehicle heater according to the first embodiment except that the actuator 42 controls the return-prevention plate 31 to switch from the first position to the second position by the detection output of the vehicle interior temperature equal to or higher than the predetermined value of the temperature sensor 41. Since the structure is the same as that of the outside air intake structure, repeated description is omitted.

[0015]

As described above, according to the present invention, the backflow prevention plate is provided so as to be able to fall down so as to allow the backflow of the air flow, and the first backflow prevention plate is provided at the first position for preventing the backflow of the air flow. And a driving means for switching to a second position allowing the backflow of the air flow , wherein the blowback prevention plate flows backward at the second position.
Air intake so that part of the air flow
The hot air after passing through the radiator is U-turned and opened, if the blow-back preventing plate is located at the second position by the driving means when the engine is started when the outside air temperature is extremely low, since it is provided near the eater. Returning to the front of the radiator from the blow-back prevention plate, a part of this air flow enters the air intake, so the heater is more efficient in warming up the low-temperature air from the beginning, and the vehicle interior is more efficient. Can be warmed. Further, if the driving means is constituted by a lever provided on the operation panel of the heater and a wire cable connecting the lever and the backlash prevention plate, the driver can arbitrarily operate the backlash prevention plate,
It is possible to control the heater heating efficiency according to the vehicle operating environment such as the season and the outside air temperature.

Further, if a temperature sensor is provided in the vehicle interior, an actuator is connected to the blowback prevention plate via a wire cable, and the driving means is configured to drive the actuator based on the detection output of the temperature sensor, Since the temperature sensor operates the blow-back prevention plate via the actuator in accordance with the temperature state of, the trouble of manually operating the blow-back prevention plate by the driver can be avoided. still,
The return position of the blow-back preventing plate is set to the second position in the lying state by the driving means only when the outside air temperature is relatively low. Therefore, the cooling efficiency of the radiator is reduced by the fact that the blow-back preventing plate is at the second position. It does not lower.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an outside air intake structure of a vehicle heater according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram of the heater.

FIG. 3 is a view showing a second embodiment of the present invention and corresponding to FIG. 1;

[Explanation of symbols]

 Reference Signs List 12 radiator 21a outside air intake 31 blow-back prevention plate 32, 43 wire cable (drive means) 33 lever (drive means) 41 temperature sensor (drive means) 42 actuator (drive means)

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-244412 (JP, A) JP-A-60-183613 (JP, U) JP-A-61-17411 (JP, U) JP-A-61-1 161016 (JP, U) Fully open 1987- 25218 (JP, U) Fully open, 49-132536 (JP, U) Fully open, 1-91615 (JP, U) Fully open, 61-109819 (JP, U) Hikaru 1-180308 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B60H 1/06 B60K 11/04 F01P 11/10

Claims (3)

(57) [Claims] The radiator (12) is provided on the periphery of the radiator (12).
(12) A backflow prevention plate that prevents the backflow of the airflow that has passed
(31) is a heater (21) provided in the vehicle to which the
Temperature of the outside air taken in from the outside air intake (21a)
In the outside air intake structure of the vehicle heater configured to be able to blow in, the blow- back preventing plate (31) is provided so as to be able to fall down so as to allow a reverse flow of the air flow, and the blow-back preventing plate (31) is A driving means (32, 33, 41, 42, 43) for switching between a first position for preventing a reverse flow of the air flow and a second position for allowing the reverse flow of the air flow , wherein the blow-back preventing plate (31) is The air flowing backward at two positions
The air intake (21a) is inserted so that a part of the flow rate enters.
An outside air intake structure for a vehicle heater , provided near the radiator (12) . A driving means provided on a control panel of the heater; a lever provided on the operation panel of the heater;
The outside air intake structure for a vehicle heater according to claim 1, further comprising a wire cable (32) connecting the first and second wires. 3. A temperature sensor (41) is provided in a vehicle interior, an actuator (42) is connected to a blowback prevention plate (31) via a wire cable (43), and a driving means is provided for the temperature sensor (41). 2. The outside air intake structure for a vehicle heater according to claim 1, wherein said actuator is configured to drive said actuator based on a detection output.