JP2712658B2 - Bus air conditioner - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bus air conditioner that air-conditions a passenger compartment of a bus.

[Related Art] Conventionally, a bus air conditioner that does not include an air conditioner dedicated to a driver's seat performs air conditioning by dividing the inside of a bus body into one or a plurality of zones. Therefore, in such a bus air conditioner, each part of the driver's seat and the passenger seat has a configuration in which the conditioned air whose temperature and humidity are adjusted by the same air conditioning means is supplied from the air outlet. As described above, the air flow rate of the conditioned air supplied from each air outlet is increased or decreased according to the deviation between the room temperature and the set temperature of each part of the vehicle interior, so that each part of the bus interior becomes the set temperature. Is controlled.

Further, an air volume adjusting grill is attached to each air outlet so that the driver and the passenger can change the air direction or reduce the air volume to a desired air blowing state.

[Problems to be Solved by the Invention] However, in the conventional technology, a high deck vehicle, which is a mainstream of recent bus vehicles, that is, a bus vehicle of a type having a high ceiling height and a driver's seat separated from a passenger seat is used. On the other hand, as described below, there is a problem that the air conditioning of the driver's seat and the passenger seat cannot be kept in an appropriate state.

In other words, in a vehicle with a high ceiling and a driver's seat below the vehicle, such as a high-deck vehicle, the area of the front glass of the driver's seat is larger, and the heat in the vicinity of the driver's seat is larger than that of the passenger seat, which is more likely to be exposed to heat from outside the vehicle. Susceptibility. In addition, since this driver's seat is isolated from the passenger cabin, the vertical movement of the temperature is larger than that of the passenger cabin.

For this reason, in such a vehicle, even though the cabin temperature is appropriate, the driver may feel hotter or colder due to the influence of the sun and the outside temperature more than the passenger. I do.

In addition, since the driver's feeling changes depending on the driver's preference and physical condition, for example, when cooling is considered, depending on the driver, the driver may feel hot or cold. Similarly, when heating is considered, it may be possible to feel hot or cold.

Therefore, the driver adjusts the air volume adjustment grill of the air conditioning duct arranged along the ceiling to increase or decrease the air volume,
Alternatively, the temperature of the driver's seat is adjusted by changing the set value of the vehicle room temperature.

In this case, in the high-deck vehicle, there is a problem that the airflow cannot be appropriately adjusted during the operation because the space between the airflow adjustment grill on the ceiling and the driver's seat is high.

Also, if the set value of the vehicle room temperature is changed without using the air volume adjustment grill, the temperature of the driver's seat will be appropriate, but this reaction will cause the room temperature of the cabin part to fall outside the appropriate range and passengers There is a problem of feeling hot or cold.

The present invention does not provide air conditioning means such as an air conditioner unit and an air conditioning duct for blowing air exclusively for a bus driver's seat. It is intended to be easily realized.

[Means for Solving the Problems] As means for achieving the above object, a bus air conditioner according to the present invention, as illustrated in FIG.
A blower duct MB provided with a driver seat blower port MB1 for blowing air to the MA and a vehicle interior blower port MB2 for blowing into the vehicle interior, and the blower ports MB1, provided on the blower duct MB.
Air volume control means MC for controlling the air volume blown out from MB2
And an air conditioner MD for supplying air to the air duct MB with at least one of temperature and humidity adjusted, provided in the vicinity of the driver's seat MA and provided for the driver's seat. A blowing amount command means ME for instructing a blowing amount from the blowing port MB1, and a blowing amount from the driver room blowing port MB1 based on a command from the blowing amount command means. In addition, the gist of the present invention is to provide a driver's seat air flow amount correction means MF for separately increasing and decreasing the amount.

[Operation] In the bus air conditioner of the present invention, the air duct MB provided with both the driver air inlet MB1 for blowing air to the vicinity MA of the driver seat and the vehicle interior air outlet MB2 for blowing air into the vehicle interior.
To the MA near the driver's seat and to the passenger compartment. The air conditioning means MD is provided at each air outlet MB of this air duct MB.
1. At least one of the temperature and humidity of the air blown from MB2 is adjusted. In other words, the airflow to the vicinity of the driver's seat MA and the airflow to the passenger compartment are both adjusted in temperature and humidity by the air conditioner MD. The air volume control means MC uniformly controls the air volume from the air outlets MB1 and MB2 of the air duct MB.

In the present invention, an air conditioning unit dedicated to the driver's seat such as an air duct dedicated to the driver's seat for blowing air to the MA near the driver's seat of the bus and an air conditioner unit for adjusting the temperature and humidity of the air blowing to the MA near the driver's seat is provided. Not a component.

And in the bus air conditioner of the present invention, based on a command from the blower amount commander ME provided near the driver's seat,
The driver's airflow correction means MF adjusts the airflow from the driver's airflow opening MB1 separately from the airflow from the vehicle interior airflow opening MB2.

As described above, by increasing or decreasing the amount of air blown from the driver's seat air outlet MB1, air conditioning in the vicinity of the driver's seat MA can be set to a desired state. The reason is that the output capacity of
When the blowing amount is V, the output capability Q of the blowing port is
This is because, as shown in the following equation (1), it is proportional to the blowing amount V. For this reason, as described above, when the temperature and humidity of the airflow from the driver's seat ventilation port MB1 to the driver's seat vicinity MA and the ventilation from the vehicle interior ventilation port MB2 to the vehicle interior are adjusted by the same air conditioner MD. However, the air conditioning in the vicinity of the driver seat MA can be set to a desired state separate from that of the vehicle cabin by the above-described driver seat air volume correcting means MF correcting and increasing or decreasing the air volume V.

For example, when the MA near the driver's seat is cooled more strongly than in the vehicle interior, the driver's air volume correction means MF increases the amount of cool air blown. The air volume correction means MF reduces the air volume of the cool air.
Similarly, when the MA near the driver's seat is warmed, it is possible to increase the amount of hot air blown to warm the room more strongly, or to reduce the amount of warm air blown to warm the room weaker.

QαV × (Tin−Tout) (1) Tin… suction temperature (room temperature) Tout… blowout temperature [Example] Next, an example of a bus air conditioner of the present invention will be described.

As shown in FIG. 2, the bus air conditioner 1 of this embodiment includes eight ceiling air conditioning units (ceiling A / C) 5a, 5b... Is 5), and four underfloor heaters 7a, 7b, 7c, 7d (hereinafter, referred to as 5)
If no particular distinction is made, reference numeral 7) is provided.
Each zone is independently temperature-adjusted by the air-conditioning controller 8 into two zones (upper zone and lower zone). The driver's seat 9 located on the right front side of the vehicle body 3 belongs to the zone.

Zone ceiling A / C5a, 5b, 5 in temperature control area
c, 5d and the ceiling A / C 5e, 5f, 5g, 5h of the zone are each provided with one refrigeration cycle system, that is, the right refrigeration cycle system 11
And the left refrigeration cycle system 13. That is, ceiling A / C5a, 5b, 5c, 5 included in the same refrigeration cycle system
d or the ceiling A / Cs 5e, 5f, 5g, and 5h all have the same vapor pressure (temperature) of the evaporator. Thus, the output capacity of each ceiling A / C5 is substantially proportional to the amount of air supplied to each ceiling A / C5.

Next, the air conditioning control of each zone of the vehicle body 3 will be briefly described.

The control of each zone by the air-conditioning control device 8 is performed based on a heat load value (hereinafter, referred to as a Y value) reflecting a heat load of each part of the vehicle. The Y value is a value obtained by subtracting the set temperature (target value) from each room temperature (actually measured value) in the zone, that is, a value calculated as a function of the integral value of the temperature deviation value.

After calculating the Y value of each zone (~), based on the calculated Y value, (i) independent control of the air flow rate in each zone of the ceiling A / C5, (ii) the zone of the ceiling A / C5, Independent control of the blow-out temperature T oc for each zone, (iii) independent control of the blow-off amount in each zone of the underfloor heater 7, (iv) blow-out temperature of each zone of the underfloor heater 7
Independent control of Toh is performed according to the following control characteristics.

As shown by the solid line in FIG. 3, the airflow volume of each ceiling A / C5 in the zone is controlled so as to increase as the Y value increases, that is, as the cooling load increases.

The outlet temperature Toc of each of the refrigeration cycle system 11 or the refrigeration cycle system 13, that is, the outlet temperature Toc of each cool air from each zone or each ceiling A / C5 of the zone, is the zone or the zone. Y
The control characteristic is such that the larger the average value Ya1 or Ya2 of the values is, the lower the control characteristic becomes.

The blow rate and the blowout temperature T oh of each underfloor heater 7 are as follows:
The control characteristics are such that the larger the negative value of the Y value is, the larger the airflow is and the higher the blowout temperature Toh is, as the heating load increases.

As described above, the room temperature of each part is adjusted toward the set temperature by controlling the ceiling A / C 5 and the underfloor heater 7 by dividing each part of the vehicle body 3 into eight zones.

Next, a configuration for adjusting the temperature of the driver's seat 9 separately from each part of the vehicle body 3 will be described. The driver's seat 9 is located in a place that is mainly affected by the temperature control by the zone and that is directly supplied with the air blown out from the ceiling A / C 5a of the zone.

FIG. 4 shows details of the configuration of each part of the zone where the driver's seat 9 is located as described above. As shown in Fig. 4, ceiling A /
C5a has two blowers 15, 17 that blow air-conditioned air into the passenger compartment.
Is attached. Also, the other ceiling of the zone
Blowers 19 and 21 are attached to the A / C 5b.

Air blow ducts 23 and 25 are respectively attached to the blowers 15 and 17 that blow the conditioned air on the ceiling A / C 5a. Blower 15
The air duct 23 through which air from the air blows is provided with a single air vent 27 above the driver's seat 9. In the air duct 25 through which the air from the other air blower 17 passes, air outlets 33 and 35 are provided above the customer seats 29 and 31, respectively. Double air duct 23,
A partition 37 is provided between the windows 25, and all the air blown from the blower 15 is blown out from a blower port 27 located above the driver's seat 9.

Air conditioning control device 8 for controlling blowers 15, 17 and ceiling A / C5a
Is configured as an electronic circuit centered on a microcomputer, and is housed in a console on the right side of the driver's seat 9. As shown in FIG. 5, a console panel (not shown) of the console includes "low", "AUTO", and "high".
Driver's seat temperature setting device 39 provided with a dial 43 having a scale of
Is attached.

As described above, the air-conditioning control device 8 that inputs various data detects the Y value and, based on this, based on this, the ceiling A / C5, each of the blowers 15, 17, 19, 21, etc., and the blowout temperature of the underfloor heater 7 And the amount of air blown, and the calculated value is converted into an analog command value by an A / D converter (not shown) and output. As shown in FIG. 6, each command value is output to the ceiling A / C5 of the zone and the underfloor heater 7, and is used as control data of the cooling capacity of the ceiling A / C5 and the amount of heat generated by the underfloor heater 7.
In addition, it is added to the base of the power transistor 41 that drives each of the blowers 15, 17, 19, 21 and the like, and adjusts the amount of air blow. In FIG. 6, the motor 42 of the blower 15 in the zone is used.
And a circuit with a power transistor 41 for driving the same, and details of the circuit configuration of the similar blower and power transistor in other zones are omitted.

The base voltage of the power transistor 41 for driving the blower 15 for the driver's seat 9 is controlled in principle based on the Y value of the zone. Is increased or decreased. With this configuration, the dial 43 of the driver's seat setting device 39 is set to "AU
The power transistor 41
Is applied without the increase / decrease correction of the command value based on the Y value. Therefore, the blower 15 that blows to the driver's seat 9 is controlled to have a standard blower amount as shown by the solid line in FIG. 3, similarly to the other blowers.

On the other hand, when the dial 43 is turned to the "low" side, the base voltage of the other zone is not changed, and only the base voltage of the power transistor 41 is increased and corrected, as shown by the one-dot broken line in FIG. Then, only the blowing amount of the blower 15 is increased and corrected. On the other hand, if the dial 43 is on the “high” side, only the blowing amount of the blower 15 is reduced and corrected as indicated by the two-dot broken line.

As described above, the bus air conditioner 1 according to the present embodiment.
The temperature of each part in the vehicle body 3 is uniformly adjusted to the set temperature, and the temperature in the vicinity of the driver's seat 9 in which air conditioning is performed by the same refrigeration cycle system as each part in the vehicle body 3 is adjusted. Can be changed simply by operating the driver's seat temperature setting device 39 without affecting the operation.

This eliminates the need for the driver to leave the driver's seat 9 and adjust the air volume and direction by the grill of the air outlet 27.
In other words, the temperature near the driver's seat 9 can be adjusted even during driving, and an extremely excellent effect that the comfort near the driver's seat 9 is improved.

In addition, the temperature in the vicinity of the driver's seat 9 is separately adjusted only by increasing or decreasing the amount of air blown to the driver's seat 9. Therefore, the cooling operation can be performed without using the cooling unit dedicated to the driver's seat 9, and as a result, the size of the device can be reduced and the number of assembling steps can be reduced.

In addition, while automatically maintaining the entire interior of the vehicle body 3, that is, the temperatures of the passenger seat and the driver's seat 9, in a comfortable state, the temperature is separately increased or decreased only in the vicinity of the driver's seat 9, which is particularly affected by the outside temperature. Therefore, the comfort of the entire vehicle body 3, that is, both the driver's seat 9 and the passenger compartment is improved.

It should be noted that the present invention is not limited to the embodiments, and various embodiments can be implemented without departing from the spirit of the present invention. For example, instead of the driver's seat temperature setting device 39 as shown in FIGS. 5 and 6, a “high” push button 50 and a “low” push button 52 are provided as shown in FIG. The setting is performed by these buttons 50 and 52, and the state is indicated by the LED display section 54.
May be used. Alternatively, the temperature may be controlled only on the high side or only on the low side.

[Effects of the Invention] The bus air conditioner of the present invention controls the air flow to the driver's seat by instructing from the vicinity of the driver's seat separately from each part of the vehicle interior where the temperature, humidity, etc. and the air flow are controlled. Increase / decrease can be corrected. Thus, the air conditioning state of the driver's seat can be set to a desired state from the vicinity of the driver's seat while appropriately maintaining the air conditioning of each part of the vehicle cabin.

Therefore, an extremely excellent effect that the comfort of the entire passenger compartment of the bus is improved is achieved.

In addition, according to the present invention, there is no need to operate a grill or the like provided in the blower port, so that operability is improved.

In addition, since the air-conditioning state of each part of the vehicle cabin can be appropriately maintained without using the air-conditioning means dedicated to the driver's seat, and only the air-conditioning of the driver's seat can be separately adjusted, the air conditioner can be downsized and the number of parts can be reduced. Reduction and comfort can be achieved at the same time.

[Brief description of the drawings]

FIG. 1 is a configuration diagram illustrating a basic configuration of a bus air conditioner of the present invention, FIG. 2 is an overall configuration diagram of a bus air conditioner of the embodiment, FIG. FIG. 5 is a configuration diagram around the driver's seat of the bus air conditioner, FIG. 5 is an external view of a driver seat temperature setting device, FIG. 6 is a block diagram of a control system of the bus air conditioner, and FIG. It is an external view of a temperature setting device. MA: driver's seat MB: air outlet MC: air volume control means MD: air conditioning means ME: air volume commanding means MF: driver air volume correction means 1: bus air conditioner 3: vehicle body 5a ~ 5h Ceiling air conditioner unit 7a ~ 7d ... Heater under floor 8 ... Air conditioning control device 9 ... Driver seat 15,17,19,21 ... Blower 39,56 ... Driver seat temperature setting device

Claims (1)

(57) [Claims] An air duct provided with an air inlet for a driver's seat for blowing air in the vicinity of a driver's seat of a bus and an air vent for a vehicle interior for blowing air into a vehicle interior, and the air blowing provided in the air duct. An air conditioning device for a bus, comprising: an air volume control unit configured to control an air volume blown from a mouth; and an air conditioner configured to supply air to the air duct at least one of temperature and humidity, wherein the driver's seat is provided. A blower amount commanding means provided in the vicinity and instructing a blower amount from the driver's seat blower port; and a blower amount from the driver's seat blower port based on a command from the driver's seat blower port. An air conditioner for a bus, comprising: a driver's airflow correction means for increasing and decreasing the airflow separately from the air flow from the mouth.