JPS6294416A - Cooler for vehicle - Google Patents

Abstract

PURPOSE:To prevent the filling by the hot air under the floor in traveling and the discharge of hot air during stop by discharging the hot air after cooling a condenser from a louver when the car speed is over a prescribed value and discharging the hot air to the underside of the floor when the car speed is below the prescribed value. CONSTITUTION:A subengine 4 is elastically supported through a mount rubber 5 at the center part of a chassis frame 3, and a compressor 6 and a condenser 7 are connected onto the both sides of the subengine 4. In this case, the output of a car speed sensor 19 is received by a controller 20, and when the car speed is over a prescribed value, the condenser fan 7 is switched through a pitch varying means 21 to the normal pitch, and when the car speed is below a prescribed value, the fan 7 is switched to the reverse pitch. When the fan 7 is in normal pitch operation, the under-floor air is inhaled and discharged from a louver 9 through a condenser case 10, while in case of reverse pitch, the outside air is inhaled from the louver 9 and discharged to the underside of the floor through the condenser case 10.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cooling system for a large vehicle such as a bus, and more particularly to a cooling system for a vehicle in which the direction of condenser cooling air can be switched.

[Conventional technology]

Cooling systems for large vehicles such as buses can be roughly divided into direct-coupled and one-piece engine-driven systems. The former type of direct-connection cooling system uses a compressor tree driven by the vehicle's running engine, and uses an electric motor fan to send outside air to a condenser mounted under the floor of the vehicle. The latter engine-driven cooling system uses an I-knob engine separate from the driving engine for cooling purposes, and sends outside air to the condenser mounted under the floor.
1) Yes.

(Problems to be solved by the invention) However, in the conventional vehicle cooling system (6 types of 1 and 1-distribution), cooling air is sucked in from the louver on the outside of the vehicle body. -1 temperature is released under the floor after 7 hours of cooling.For this reason, the air that has been divided into 8 layers (60 to 70 degrees Celsius) due to heat exchange is trapped under the floor. This condensation penetrated into the middle chamber from the floor surface, and the cooling MI'i# in the middle chamber increased significantly, causing a problem of burnout. To avoid this, consider sucking cooling air from under the car body and letting it out to the louver.
In this case, the hot air will be coming out from the louver, and when the vehicle is stopped, the looper will put 1"1" on its own and 2 people will pass through it. If you are exposed to hot air, you will have the k problem!1-.

Furthermore, when the vehicle is running, the static pressure on the side plate of the φ body where the guard louvers are installed is at the angle F2i, and the static pressure under the floor is positive due to the ground effect. 3J,
Sea urchin 2nd floor fan is sent from the louver to under the floor.
This means that the air is blown against the above-mentioned static pressure distribution, and the energy consumption of the condenser fan becomes very large.

Therefore, the purpose of the present invention is to prevent the hot air after cooling the Conan 1J from being trapped under the floor of the vehicle while it is running at high speed, and to prevent it from flowing out from the louvers when it is stopped.
To provide a cooling system for a vehicle that can reduce the energy consumption of a fan.

(Means for Solving the Problems) The configuration of the present invention for achieving the objective 1 is described in an embodiment (J
This will be explained using corresponding FIGS. 1 to 4.

The vehicle cooling device of the present invention is arranged in an air passage formed between a louver 9 installed on a car body outer panel 8 and the underfloor of the car body, and blows cooling air to a condenser (J11). ) 1/7, a detector 19 for detecting the running speed of the vehicle, and when the running speed of the vehicle is above a predetermined value, suctioning air from under the floor of the vehicle body and outputting it to the looper 9;
In addition, when the vehicle running speed is lower than a certain value of -3, the outside air is removed. Suction from looper 9 and 1-H1! Air blowing direction switching means 20° 21. for switching the air blowing direction of the CI recorder fan 7 in response to the output of the detector 19 so as to direct the middle body 111 under the floor.
It is equipped with 22 parts.

[Effect]

According to the above configuration, when the vehicle is running at high speed, the air blowing direction switching means 20, 21 is controlled according to the output of the detector 19 which detects this when the vehicle is running at high speed.
．． 22 changes the blowing direction of the condenser fan 7 so that the condenser cold air flows out from under the floor toward the louvers 9. As a result, the hot air after being cooled is discharged from the louver 9 to the outside of the vehicle, thereby preventing the hot air from being trapped under the floor. Furthermore, since the air blowing direction at this time is suitable for the static low L power distribution between the louver 9 and the underfloor, the consumption of 21 indens (1-Nehru% of the J-fan 7) is reduced.

On the other hand, when the vehicle is stopped (B), the air blowing direction switching means 20.2 is activated according to the detected output of the detector 19.
1, 221; change the blowing direction so that the cooling air flows out from the louver 9 to the underfloor. This results in
This prevents a person standing in front of the louvers of a parked vehicle from being exposed to hot air.

〔Example〕

Below, a first embodiment of a vehicle cooling device according to the present invention will be described.
This will be explained with reference to FIGS. 4 to 4.

FIG. 2 shows a bus equipped with a sub-engine-driven cooling system according to the first embodiment of the present invention.
A sub-engine driven cooling system is installed below! ~A is mounted. This cooling device unit A is elastically supported by the vehicle body 1 using a rubber mount (not shown) so as to absorb shock from the vehicle body.

FIG. 1 shows this air conditioner unit A in detail, in which a 1J engine 4 is mounted in the center of the frame 3.
- A compressor 6 and a condenser fan 7, each driven by a sub-engine, are arranged on both sides of the revene engine 4, which is elastically supported via a rubber 5. This condenser fan 7 is a variable pitch propeller fan, and when changing from normal pitch to reverse pitch,
111, determine the /j direction. 11N between the looper 9 formed on the outer plate 8 on the vehicle body side and the condenser 7/on 7 (
A money case 10 is arranged, and a second case 10 and a second case 11 and one nozzle 12 are stored.

■The vaporizer fan 13 is driven by the leaveton engine 1, 1, -) via the power transmission system 14, and the 2F vaporizer fan 1S3 (opposed to -U, 1 vaporator case 15 is arranged tF?/ and in this case 15) 1.1
:+- The carburetor 16 is housed.The Iv case 15 communicates with the air intakes 11 to 18 through the floor air intake 17.
It is taken into the vaporizer nozzle 15 through the five-way intake port 17, cooled by the T-vaporator 16, and then discharged to the conductor 18 from a duct (not shown).

FIG. 3 shows a configuration for switching the air blowing direction of the variable pitch propeller fan 7. The detection output of the vehicle speed sensor 19 that detects the running speed of the bus is received by the engine 1-port 20. 1-1-ra 2 (according to the output of the vehicle speed sensor 19, when the output of the vehicle speed sensor 19 indicates a predetermined vehicle speed or higher, the pitch variable hand r (variable bit pitch 1 via 221) When the vehicle speed is lower than a predetermined vehicle speed, the fan 7 is switched to the opposite pitch via the pitch variable means 21. When the pitch is forward, the fan 7 sucks underfloor air and sends it through the condenser case 10. When the pitch is reversed, air outside the vehicle is suctioned from the looper 9 and discharged to the underfloor via the 1-denser case 10.

The vehicle speed sensor 19 can be of various types, such as a type that detects the rotation of the axle or a pitot tube type 41 that measures the relative speed of airflow with respect to the vehicle body.

Next, the operation of this embodiment will be explained.

While the bus is traveling at high speed, the controller 20 drives the pitch variable means 21 according to the detection output of the vehicle speed sensor 19,
This pitch variable means adjusts the pitch of the propeller fan 7. As a result, the filter fan 7 blows out the underfloor air from the looper 9 to the inside and outside through the condenser 11 and the radiator 12. In this way] Ndenri 11 and Raji [
Ri12 cold? The hot air after Jl is released from looper 9 and is not trapped in floor 1, so it is cool υj 16 M
It is possible to prevent the increase in Furthermore, the vehicle speed is 11.1,
The static pressure increases due to the ground effect under the floor, and conversely, it is connected to the negative pressure on the side panels of the car body, and the air under the floor can be easily discharged from the looper 9.
Energy can be reduced. Of course, since the vehicle is traveling at high speed, the hot air discharged from the looper 9 will not affect people outside the city.

On the other hand, when the bus is stopped or running at low speed, the vehicle speed sensor 1
The pitch variable means 21 changes the pitch of the fan 7 of the fan 1-1 to the opposite pitch in response to a command from the fans 1 to 1-ra 20 corresponding to the detection output of the fan 9. As a result, the air blowing direction is reversed, and the air is blown from the looper 9 to h under the floor.

Therefore, it is possible to avoid a situation where a person standing in front of the looper 9 is exposed to hot air. /1 Oh, with this air blowing direction, there is a problem that the cooling charge increases due to IJI of hot air coming out under the floor! However, since the operating time of the air conditioner is generally much longer when the vehicle is running at high speed than when the vehicle is stopped or traveling at low speed, the above problem can be substantially ignored.

FIG. 4 shows a second embodiment of the present invention, in which the fan is driven by a motor 22, and the motor 22 reverses its direction of rotation in response to a command from the controller 20. to change the air blowing direction.

The other configurations are the same as in FIG. 1 =-. controller 2
0, when the vehicle speed is high according to the detection output of the vehicle speed sensor 19, the motor 22 is rotated once to discharge the underfloor air to the looper 9, and when stopped or running at low speed, the motor 22 is reversed and the looper 9 is discharged. Air is blown from below the floor.

Note that hot air must be discharged under the floor when the vehicle is stationary and from the looper when driving at high speed, but the vehicle speed at which the air blowing direction is switched can be set as appropriate. For example, the above-described switching may be performed depending on whether the vehicle speed is slower than slow driving, or may be performed depending on whether the vehicle is stopped or not.

〔Effect of the invention〕

It is clear from the above explanation', KJ: Sea urchin, according to the present invention', 1
``The basket absorbs the hot air of Condenri Rei 14111 at a predetermined vehicle speed.
When uff is 1, 171 comes out from the louver, so that IJl +I-J is placed on the scraping floor smaller than the specified candy (this,
Since the direction of the fan's air flow is changed according to the vehicle speed, it is possible to prevent an increase in the amount of air conditioning in the passenger compartment caused by hot air flowing under the floor. Since the air flow follows the static distribution, it is possible to reduce the energy consumption of the No. 21 fan.Also, while the vehicle is stationary (i.e., when a person who is exposed to the T louver is exposed to hot air) Not at all.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view showing an embodiment of the cooling device for medium meat according to the present invention, and Fig. 2 is a cross-sectional view showing an embodiment of the cooling device for medium meat according to the present invention. Pt
Figure 3 is a schematic diagram showing a bus equipped with a bus equipped with a bus equipped with the above-described embodiment. Yes. 2...floor, 7...=1nden 1J-fan, 8...
・Vehicle body side outer plate, 9... Louver, 11... Capacitor, 19... Vehicle speed controller,
21...Pitch variable means, 22...Motor.

Claims (3)

[Claims] 1. A condenser fan that is placed in a ventilation path formed between a louver provided on the outer panel of the vehicle body and the underside of the vehicle body and blows cooling air to the condenser, a detector that detects the vehicle running speed, and a vehicle traveling speed. is greater than or equal to a predetermined value,
According to the output of the detector, air is sucked from under the floor of the vehicle body and discharged to the louver, and when the vehicle running speed is lower than a predetermined value, air outside the vehicle is sucked through the louver and discharged to the underfloor of the vehicle body. A cooling device for a vehicle, comprising a blowing direction switching means for switching the blowing direction of the condenser fan. 2. 2. The vehicle cooling system according to claim 1, wherein the condenser fan is a propeller fan, and the blowing direction switching means changes the rotational direction of the propeller fan. 3. The vehicle cooling system according to claim 1, wherein the condenser fan is a variable pitch propeller fan, and the air blowing direction switching means switches the angle variable pitch propeller fan from forward pitch to reverse pitch. .