JP3024185B2 - Bus air conditioner - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a bus air conditioner.

(Conventional technology and problems)

As shown in FIG. 9, the duct 1 of the bus air conditioner was disposed above the side window glass 2 and outside the load shelf 3. However, recently, the luggage rack has been miniaturized due to the expansion of the underfloor baggage room (luggage room), and the duct 1 has been installed near the center of the vehicle as shown in FIG. The installation area of the glass 2 has been expanded to the upper part of the vehicle. For this reason, the influence of solar radiation increases,
Furthermore, since the arc shape (so-called ares) of the glass surface becomes large, it is difficult to install the curtain.

Therefore, even if the temperature in the vehicle interior is uniform, passengers who are not exposed to the sun are comfortable, but passengers who are exposed to the sun are hot. For this purpose, air conditioners have taken measures such as performing control to automatically lower the set temperature by 1 to 2 ° C. when solar radiation is detected by a solar radiation sensor, but this is not sufficiently satisfactory. I wanted to.

An object of the present invention is to provide an air conditioner for a bus which can avoid deterioration of a cooling environment due to solar radiation into a vehicle interior and can provide an optimal space.

[Means for solving the problem]

This invention provides a pair of ducts extending in the front-rear direction of the bus on both sides of a ceiling portion of the bus, and in a bus air conditioner that blows cool air into the vehicle interior through both the ducts, the bus is formed in each of the ducts, An opening that opens on the side of the opposing duct, an opening adjustment means that is provided in the opening and adjusts the opening of the opening, and whether solar radiation enters the vehicle interior from either side of the bus Detecting the presence of insolation in the vehicle compartment from either side of the bus, when the insolation direction detection device detects The opening degree of the opening is larger than the opening degree of the opening on the side where the solar radiation enters the vehicle interior, and the side where the solar radiation enters the vehicle interior from the opening on the side where the solar radiation does not enter the vehicle interior. Blows air-conditioned wind toward the seats Therefore, the gist of the present invention is a bus air conditioner having control means for controlling the opening degree adjusting means.

[Action]

The control means, when the solar radiation direction detecting means detects that solar radiation enters the vehicle interior from either direction on both sides of the bus, the opening degree of the opening on the side where the solar radiation does not enter the vehicle interior into the vehicle interior. The opening degree of the opening on the side where the solar radiation is entering is made larger than the opening degree, and the conditioned air is blown from the opening on the side where the solar radiation does not enter the vehicle interior toward the seat on the side where the solar radiation enters the vehicle interior. To this end, the opening degree adjusting means is controlled. as a result,
Through the duct, a larger amount of cold air is blown from the opening on the side where the solar radiation does not enter into the vehicle compartment toward the side where the solar radiation enters than the opening where the solar radiation enters.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 2, an air conditioner unit 11 is arranged in the lower part of the floor in front of the bus. The air conditioner unit 11 includes a blower, an evaporator, a heater core, and the like. Then, during cooling, air (inside air or outside air) from the blower is heat-exchanged when passing through the evaporator, and cool air is sent out.

A right duct 12 extends in the front-rear direction of the vehicle on the right side in the traveling direction on the ceiling in the vehicle interior. Similarly,
On the ceiling in the cabin, on the left in the direction of travel, the left duct
13 extends in the front-rear direction of the vehicle. Then, cool air from the air conditioner unit 11 is introduced from the front ends of the ducts 12 and 13.

As shown in FIG. 1 and FIG. 2, the lower part of the right duct 12 projects below the existing right shelf 14 toward the left duct 13 and has a rectangular shape (3 Pieces)
The right duct opening 15 is formed. That is, the right duct opening 15 opens toward the left side of the vehicle interior. Similarly, the lower part of the left duct 13 protrudes toward the right duct 12 through the lower part of the existing left shelf 16 and has a plurality of (three) rectangular duct openings 17 at the tip thereof.
Are formed. That is, the left duct opening 17 opens toward the right side of the vehicle interior.

In FIG. 1, reference numeral 50 denotes a grill (air outlet) which is provided on the lower surfaces of the left and right ducts 12 and 13 and is always open.

Further, as shown in FIG. 3, the openings 15, 17 in the ducts 12, 13 (only the right side is shown in FIG. 3) have opening adjustments for opening and closing the openings 15, 17, respectively. A louver 18 as means is rotatably provided.

As shown in FIG. 5, each louver 18 is provided with an opening / closing plate 19 and a reinforcing plate 20 extending in the front-rear direction in a state parallel to each other, and these are provided by five rectifying plates 21a to 21e spaced at equal intervals. Fixed. Between the opening / closing plate 19 and the reinforcing plate 20, a shaft 22 is fixed through the straightening plates 21a to 21e. Both front and rear ends of the shaft 22 protrude from the rectifying plates 21a and 21e, and servo motors 31 to 36 to be described later are drivingly connected to the rear protruding portions via a link mechanism. When the louver 18 rotates about the shaft 22 by the servo motors 31 to 36 and the link mechanism, the opening and closing plate 19 as shown in FIG.
7) is opened and the opening / closing plate 19 closes the opening 15 (17) as shown in FIG.

The rectifier plates 21a to 21e of the louver 18 are formed to be larger toward the rear side of the vehicle (the left side in FIG. 5). Then, the cool air introduced from the front ends of the left and right ducts 12, 13 is supplied to the rear, the flow is changed by equal amounts in each of the rectifying plates 21a to 21e, and is blown out from the openings 15, 17 into the vehicle interior. It has become so. Also, a stopper portion is provided on the rectifying plates 21a to 21e.
When the stopper portion 23 comes into contact with the openings 15, 17 of the ducts 12, 13 at the end of the rotation of the louver 18, further rotation is prevented.

FIG. 6 shows the electrical configuration. An air conditioner switch 25 and a main controller 26 are connected to the battery 24 in series. The main controller 26 is a controller that controls the entire air conditioner. Also, the main controller 26
And the negative terminal of the battery 24 and the relay coil 27
a is connected. When the air conditioner switch 25 is turned on (closed), the main controller 26 turns on the relay coil.
27a is excited to close the normally open relay contact 27b.

A relay contact 27b and a louver controller 28 as control means are connected in series to the battery 24, and the louver controller 28 has a built-in microcomputer. The louver controller 28 is connected to a right solar sensor 29 and a left solar sensor 30 as solar direction detecting means. The right solar radiation sensor 29 detects the amount of solar radiation that passes through the right window glass and enters the vehicle interior, and the left solar radiation sensor 30 detects the amount of solar radiation that passes through the left window glass and enters the vehicle interior.

Further, the louver controller 28 has a servo motor 31
~ 36 are connected. FIG. 7 shows servo motors 31 to 36
And a partial electrical configuration of the louver controller 28.
The servo motors 31 to 36 are composed of a motor body 37 and a motor body 37.
And a switching device 38 for driving and stopping the motor. The switching device 38 includes a rotating shaft 39 fixed to an output shaft of the motor main body 37, rings 40, 41, 42 disposed on an outer peripheral portion of the rotating shaft 39, and a motor main body 37 fixed to the rotating shaft 39. And the contact 43 that slides on the rings 40, 41, 42 with the drive (rotation of the output shaft). Notches 40a and 42a are formed in the rings 40 and 42 at positions shifted from each other by 180 °.
When the position 43 is located in the cutout portions 40a, 42a of the rings 40, 42, the louvers 18 open and close the openings 15, 17, respectively. When this contact 43 is located in the notch 42a of the ring 42, the other rings 40, 41 contact the contact 43, and when the contact 43 is located in the notch 40a of the ring 40, 41,
42 is in contact with the contact 43.

The ring 41 is connected from the D terminal to the positive terminal of the battery 24, and the rings 40 and 42 are connected to the switching contacts from the C and E terminals.
Grounded via 44 and relay coil 45. A terminal A of the motor main body 37 is connected to a relay contact 46. One terminal of the relay contact 46 is connected to a positive terminal of the battery 24, and the other terminal is grounded. further,
The B terminal of the motor body 37 is connected to the plus terminal of the battery 24.

Then, for example, when the louver 18 is closed from the opened state, the switching contact 44 is switched to the C terminal side from the state where the switching contact 44 shown in FIG. Energized, the relay contact 46 switches,
Electric power is supplied to the motor body 37, and the motor body 37 rotates. When the contact 43 rotates to the position shown by the broken line in FIG. 7, the relay coil 45 is de-energized, the relay contact 46 is switched, the driving of the motor body 37 is stopped, and the louver 18 is closed. Similarly, when the louver 18 is opened from the closed state, the switching contact 44 is switched from the C terminal side to the E terminal side, and the contact 43 is moved from the notch 40a of the ring 40 to the ring 4.
The louver 18 is opened by pivoting to the second notch 42a.

In FIG. 6, the louver controller 28 checks the open / close state of each louver 18 based on signals from the servomotors 31 to 36. That is, the voltages of the E terminal and the C terminal are checked. If the E terminal has a positive potential, the louver 18 is in a closed state. If the C terminal has a positive potential, the louver 18 is in an open state. If both the voltages of the terminal C and the terminal C have a positive potential, it is determined that the rotation is in progress.

In addition, in detecting the position of the servomotor, if a positive voltage is applied to the E terminal and the C terminal for a predetermined time or longer, it is determined that the servomotor or the louver is caught and the servomotor is stopped or the diagnosis is stopped. May be displayed.

The operation of the bus vehicle air conditioner thus configured will be described.

FIG. 8 shows the control of the servomotors 31, 32, and 33 provided in the right duct 12 performed by the louver controller.

When the air conditioner switch 25 is turned on (closed), the main controller 26 energizes the relay coil 27a to close the relay contact 27b and supply power to the louver controller 28.

Then, the louver controller 28 initializes the count values of the counters A, B and C in step 100 (A = B = C
= 0). Then, the louver controller 28 proceeds to step 10
In step 1, the output value of the left solar radiation sensor 30 is read, and step 102
In step 103, the value of the counter C is incremented by "1". Thereafter, the louver controller 28 determines in step 104 whether the value of the counter C is equal to or greater than "40", and returns to step 101 if the value is less than "40".

By repeating steps 101 to 104, step 10
When the value of the counter C at 4 becomes “40” or more (that is, 1
When 0 seconds have elapsed), the louver controller 28 resets the value of the counter C in step 105. After that, the louver controller 28 calculates the average value of the reading values of the left solar radiation sensor 30 for 40 times in step 106, and converts the average value into the amount of solar radiation (unit: kcal / h · m ² ).

Here, the reason why the output reading number of the left solar radiation sensor 30 is set to 40 times and the wait for 10 seconds is performed is to average the amount of solar radiation.

Furthermore, louver controller 28 average solar radiation is determined whether 400kcal / h · m ² or more in step 107, determines whether not more than the louver 18 provided on the right duct 12 in step 108 is open And if open, step 10
In step 9, the value of the counter A is incremented by "1". In step 110, if the value of the counter A is "6" or less, step 101
Return to When the value of the counter A becomes "6" (that is, after 1 minute), the louver controller 28 performs step
In step 111, the switching contact 44 shown in FIG. 7 is operated to close each louver 18 provided in the right duct 12, and thereafter, in step 112, the value of the counter A is reset.

In addition, the louver controller 28 sets the value of the counter B to “0” in step 113 if each louver 18 provided in the right duct 12 is closed in step 108.

On the other hand, louver controller 28 if the average amount of solar radiation in step 107 is 400kcal / h · m ² or more, step 114
It is determined whether or not each louver 18 provided on the right duct 12 is open. If it is closed, the value of the counter B is incremented by "1" in step 115, and the value of the counter B is "6" or less in step 116. If so, the process returns to step 101. When the value of the counter B becomes "6" (that is, one minute has elapsed), the louver controller 28 operates the switching contact 44 in FIG. 7 to open each louver 18 provided in the right duct 12 in step 117, and thereafter, In step 118, the value of the counter B is reset. The reason why the one-minute wait is performed before the louver operation is to reduce the frequency of the opening and closing operations of the louver 18.

As a result, as shown in FIG. 1, each louver 18 provided in the right duct 12 is opened, and cool air is blown out from the right duct opening 15 toward the left occupant ML on which the solar radiation is applied. At this time, the airflow from the grill 50 in the right duct 12 to which the solar radiation is not applied decreases, and the airflow from the right duct opening 15 increases accordingly, and the feeling is improved.

If the louvers 18 provided on the right duct 12 are open in step 114, the louver controller 28 sets the value of the counter A to "0" in step 119.

Until now, the right duct 12 using the left solar radiation sensor 30
The control of the opening and closing of each louver 18 provided in the left duct 13 has been described, but the control of each louver 18 provided in the left duct 13 is the same as the flow shown in FIG. In other words, louver controller 28 reads the output value of the right solar radiation sensor 29, determines the amount of solar radiation converted value of the output value whether 400kcal / h · m ² or more, as long 400kcal / h · m ² or more, As shown in FIG. 1, each louver 18 provided in the left duct 13 is opened, and cool air is blown out from the left duct opening 17 toward the right occupant MR.

As described above, in the present embodiment, the left and right ducts 12 and 13 are provided with the openings (right and left duct openings 15 and 17) that open to the opposed duct sides, respectively, and the right and left duct openings 15 and 17 are provided. A louver 18 (opening adjustment means) for opening and closing the openings 15, 17 is provided in the
29, 30 (solar direction detecting means) can detect whether solar radiation enters the vehicle compartment from either the left or right direction of the vehicle. When the louver controller 28 (control means) detects that the solar radiation sensors 29, 30 are entering the vehicle interior from either direction on both sides of the bus, the louver controller 28 (control means) detects that the solar radiation is not entering the vehicle interior. The louver 18 was opened and the louver 18 on the side where the solar radiation was entering was closed. That is, the openings of the openings 15 and 17 on the side where sunlight does not enter are made larger than the openings of the openings 15 and 17 on the side where sunlight enters the passenger compartment, and the opening of the side where sunlight does not enter the passenger compartment. Opening 15,1
From 7 the air conditioning was blown out toward the seat on the side where the sun shines into the cabin.

As a result, the cool air is blown through the right or left ducts 12 and 13 from the right or left duct openings 15 and 17 on the side where the solar radiation does not enter the vehicle compartment to the side where the solar radiation enters the passenger compartment. . Therefore, it is possible to avoid deterioration of the cooling environment due to the solar radiation into the vehicle interior and to set the optimal space.

The present invention is not limited to the above embodiment. For example, the solar radiation sensor may be a sensor that detects the sun altitude and the direction of the sun. May be calculated. In addition, the louver 18 may be capable of adjusting an intermediate opening degree other than the fully open / closed state. In other words, the opening degree of the opening on the side where sunlight does not enter is the side on which the sunlight enters the vehicle interior. Any control may be used so long as it is larger than the opening degree of the opening.

〔The invention's effect〕

As described in detail above, according to the present invention, an excellent effect of avoiding deterioration of the cooling environment due to solar radiation into the vehicle interior and achieving an optimal space can be achieved.

In the case where the cool air is blown directly from directly above the passenger, the distance between the outlet and the passenger is short, so that local cooling is performed. In other words, the cold air is blown out from the non-solar side to the passengers on the solar side, so that the cool air can be diffused around the passengers, resulting in more mild cooling. Can be.

Further, according to the present invention, the opening degree of the opening from the side where sunlight does not enter is made larger than the opening degree of the side where sunlight enters, and a large amount of cold air is directed toward the side where sunlight enters. Since the air is blown out, the amount of air blown directly to the passenger on the side with less solar radiation can be reduced, and the cooling feeling can be improved even for the passenger on the side with less solar radiation.

Moreover, the required cooling capacity can be obtained without lowering the cooling feeling for the passenger.

[Brief description of the drawings]

FIG. 1 is a sectional view of a bus in an embodiment, FIG. 2 is a sectional view of a duct of a bus air conditioner, FIG. 3 is a sectional view of a duct, FIG. 4 is a sectional view of a duct, and FIG. FIG. 6 is an electric circuit diagram of the air conditioner, FIG. 7 is an electric circuit diagram of the servomotor, FIG. 8 is a flowchart, FIG. 9 is a cross-sectional view of a bus for explaining the conventional air conditioner, FIG. FIG. 10 is a sectional view of a bus for explaining a conventional air conditioner. 12 is a right duct, 13 is a left duct, 15 is a right duct opening, 17 is a left duct opening, 18 is a louver as opening adjustment means, 28 is a louver controller as control means,
29 is a right solar radiation sensor as a solar direction detecting means, 30 is a left solar radiation sensor as a solar radiation detecting means

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B60H 1/00 102 B60H 1/00 103

Claims (1)

(57) [Claims] 1. A bus air conditioner for providing a pair of ducts extending in the front-rear direction of a bus on both sides of a ceiling portion of the bus, and blowing cool air into a passenger compartment through the two ducts. An opening that opens on the side of the opposing duct, an opening adjustment means that is provided in each of the openings and adjusts the opening of the opening, and that solar radiation enters the vehicle interior from either direction on both sides of the bus. Detecting the presence or absence of insolation in the vehicle interior when the insolation direction detection unit detects that solar radiation has entered the vehicle interior from either side of the bus. The opening degree of the opening on the side is made larger than the opening degree of the opening on the side where the solar radiation enters the vehicle interior, and the solar radiation enters the vehicle interior from the opening on the side where the solar radiation does not enter the vehicle interior. Air conditioning toward the seat An air conditioner for a bus, comprising control means for controlling the opening degree adjusting means to blow out the air.