JP2008030594A - Air conditioner for bus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce uncomfortable sense felt when a passenger gets off. <P>SOLUTION: When a getting off switch is operated by the passenger and a temperature detected by an outside air temperature sensor is at a constant temperature (25°C) or higher, an outside air introduction port 94 is released by a switching damper 12 and a clearance between a getting off port duct 9d and a left side duct 9b is closed by a switching damper 13. An auxiliary fan 11 then mixes internal air from an internal air introduction port 92 with outside air from the outside air introduction port 94, and blows out it from a plurality of blowing ports 91 toward a getting off area 3a. Since the air temperature at the getting off area 3a is warmed as compared with the air temperature at the other area, temperature difference of the outside air temperature and the air temperature at the getting off area 3a is reduced. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a bus air conditioner that air-conditions a passenger compartment of a bus.

Conventionally, even if the heat load in the passenger compartment of the bus fluctuates, by controlling the air temperature so that the room temperature is uniform, the passengers can be comfortably comfortable in the passenger compartment even when the outside air temperature is high, such as in summer There is a bus air conditioner that can be used (for example, see Patent Document 1).
JP-A-6-87321

  In the above-described bus air conditioner, the air temperature in the passenger compartment is controlled to an appropriate temperature. For example, when the outside air temperature is high in summer, the temperature difference between the room air temperature and the outside air temperature becomes large. Therefore, when the passenger gets off at a stop or the like, there is a problem that the temperature difference becomes uncomfortable due to heat stress.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a bus air conditioner that reduces discomfort felt by a passenger when the passenger gets off.

  In order to achieve the above object, the present invention is a bus air conditioner that is applied to a bus provided with a getting-off switch operated to convey to the driver the intention of a passenger to get off, and that air-conditions the interior of the vehicle, Air conditioning means for adjusting the air condition in the passenger compartment and the air conditioning means in accordance with the getting-off signal output from the getting-off switch, and getting off in the vicinity of the exit door in the passenger compartment prior to the passenger getting off And a control means for making the air temperature in the area higher than the air temperature in other areas other than the dismounting area.

  Therefore, since the temperature difference between the air temperature in the dismounting area and the outside air temperature can be reduced, it is possible to reduce discomfort felt when getting off.

  In addition, the code | symbol in the bracket | parenthesis of each means described in a claim and this column shows the correspondence with the specific means as described in embodiment mentioned later.

(First embodiment)
FIG. 1 shows the overall configuration of a bus air conditioner according to the present invention. FIG. 1 is a perspective view of the interior of a bus as viewed from above.

  First, prior to the description of the bus air conditioner of this embodiment, the configuration of the passenger compartment of the bus will be described.

  A driver's seat 1 is arranged on the right side in the traveling direction of the bus interior of the bus, a plurality of passenger seats 2 are arranged on both sides of the vehicle width direction, and a passenger seat 2 is also arranged behind the passenger compartment. Has been. An exit door 3 is provided on the left side in the vehicle width direction in the traveling direction of the passenger compartment, and an exit area 3 a is provided in the vicinity of the exit door 3. A boarding door 4 is provided behind the boarding door 3 in the passenger compartment, and a boarding area 4 a is provided in the vicinity of the boarding door 4. The boarding door 4 and the boarding door 3 are opened and closed by a driving device based on an operation of a driver (not shown).

  Next, the bus air conditioner of this embodiment will be described with reference to FIG.

  The air conditioner for buses includes an air conditioning duct 9, and the air conditioning duct 9 includes a right duct 9a, a left duct 9b, a central duct 9c, an exit port duct 9d, and an air curtain duct 9e.

  The right duct 9a is disposed on the right side in the vehicle width direction, and includes a plurality of air outlets 91 for blowing conditioned air from the ceiling side (or side wall) toward the right passenger seat 2 and the driver seat 1, respectively. The left duct 9b is disposed on the left side in the vehicle width direction excluding the dismounting area 3a, and includes a plurality of outlets 91 for blowing conditioned air from the ceiling side (or side wall) toward the left passenger seat 2 and the riding area 4a. ing.

  The central duct 9c is disposed at the center in the front-rear direction and is configured to communicate between the right duct 9a and the left duct 9b. The central duct 9c introduces vehicle interior air (inside air) from the vehicle interior center. The inside air inlet 92 is provided. The exit duct 9d is configured to communicate with the left duct 9b, and the exit duct 9d includes an exit area outlet 93 for blowing conditioned air into the exit area 3a, an outside air introduction port 94 for introducing outside air, And an inside air introduction port 95 for introducing inside air.

  The air curtain duct 9e is configured to communicate with the left duct 9b, and the air curtain duct 9e includes a plurality of air outlets 91. The plurality of outlets 91 are arranged along the boundary between the left passenger seat 2 and the getting-off area 3a, and each blows conditioned air from the ceiling side.

  The bus air conditioner includes cooling heat exchangers 6a and 6b, and the cooling heat exchangers 6a and 6b are disposed in the central duct 9c. The cooling heat exchanger 6a is disposed between the inside air inlet 92 and the right duct 9a, and cools the inside air introduced from the inside air inlet 92. The cooling heat exchanger 6b is disposed between the inside air introduction port 92 and the left duct 9b, and cools the inside air introduced from the inside air introduction port 92.

  As shown in FIG. 2, the cooling heat exchangers 6 a and 6 b constitute a refrigeration cycle apparatus together with the compressor 20, the condenser 21, the gas-liquid separator 22, the supercooler 23, and the expansion valve 24.

  The compressor 20 compresses and discharges the refrigerant by the driving force from the traveling engine E via the electromagnetic clutch 11a. The condenser 21 cools and condenses the gas-phase refrigerant from the compressor 20 with the air blown from the electric blower 21a. The gas-liquid separator 22 separates the refrigerant from the condenser 21 into a gas-liquid refrigerant and a liquid-phase refrigerant. The supercooler 23 cools the liquid-phase refrigerant from the gas-liquid separator 22 with the air blown from the electric blower 21a. The expansion valve 24 depressurizes the refrigerant from the subcooler 23. The cooling heat exchangers 6a and 6b are arranged in parallel to the flow of the refrigerant discharged from the compressor 20, and cool the blown air by evaporation of the refrigerant.

  The bus air conditioner includes four blowers 10a and four blowers 10b, and the four blowers 10a and the four blowers 10b are arranged in the central duct 9c. Each of the four blowers 10a is composed of an impeller and an electric motor that drives the impeller, and introduces the inside air from the inside air introduction port 92 and passes through the cooling heat exchanger 6a toward the right duct 9a. Blow. Each of the four blowers 10b is composed of an impeller and an electric motor that drives the impeller, and introduces the inside air from the inside air introduction port 92 and passes through the cooling heat exchanger 6b toward the left duct 9b. Blow.

  The air conditioner for buses includes an auxiliary blower 11, and the auxiliary blower 11 is disposed between the outside air introduction port 94 and the inside air introduction port 95 in the exit duct 9d, and introduces outside air and inside air from the outside air introduction port 94. The inside air from the mouth 95 is introduced and blown.

  The exit duct 9d is provided with a switching damper 12 that is rotatably supported and opens and closes the outside air introduction port 94. The switching damper 12 is provided with a butterfly door (plate door) in which a rotation shaft is arranged at the center of the plate portion. The switching damper 12 is driven by a servo motor 12a. A switch damper 13 that is rotatably supported is provided between the exit duct 9d and the left duct 9b, and the switch damper 13 opens and closes between the exit duct 9d and the left duct 9b. The switching damper 13 is driven by a servo motor 13a.

  Next, the electrical configuration of the bus air conditioner of the present embodiment will be described with reference to FIG.

  The bus air conditioner includes an electronic control device 30, a sensor group 31, a drop-off switch group 32, and a control panel 33. The electronic control unit 30 includes a microcomputer, a memory, a peripheral circuit, and the like. The electronic control unit 30 uses a detection signal from the sensor group 31, an output signal from the getting-off switch group 32, and an output signal from the control panel 33. Accordingly, the electromagnetic clutch 11a, the servo motors 12a and 13a, and the blowers 10a, 10b, and 11 are controlled.

  The sensor group 31 includes an evaporator blowout temperature sensor that detects the temperature of the air blown from the cooling heat exchanger 6a, an outside air temperature sensor that detects the outside air temperature, an inside air temperature sensor that detects the inside air temperature, and the door 3 for getting off the vehicle. A door opening / closing sensor for detecting opening / closing is used. As the door opening / closing sensor, a normally open switch or a normally closed switch is used.

  The control panel 33 is operated for setting the set temperature Tset in the vehicle interior and for starting and stopping the air conditioning operation. The electromagnetic clutch 11a intermittently controls (connects or disconnects) between the compressor 20 and the traveling engine E. The getting-off switch group 32 is arranged in the vicinity of each passenger seat 2 and is operated to convey to the driver the intention of the passenger to get off.

  Next, the operation of the bus air conditioner of this embodiment will be described.

  First, the driver operates the control panel 33 to start the air conditioning operation. Then, the electronic control unit 30 controls the overall air conditioning mode as follows.

  That is, the electromagnetic clutch 11a is intermittently controlled so that the temperature detected by the evaporator outlet temperature sensor approaches the target evaporator temperature Teo. The blowers 10a and 10b are driven, and the blower 11 is stopped. Further, the switching damper 12 is driven via the servo motor 12a to close the outside air introduction port 94. Further, the switching damper 13 is driven via the servo motor 13a to open the space between the exit duct 9d and the left duct 9b.

  As a result, the blower 10a draws in the inside air from the inside air introduction port 92, and blows out the intake air toward the right duct 9a through the cooling heat exchanger 6a. Then, the cool air from the cooling heat exchanger 6a is blown out from the outlets 91 of the right duct 9a toward the right passenger seats 2, respectively.

  Further, the blower 10b sucks the inside air from the inside air introduction port 92, and blows the intake air toward the left duct 9b through the cooling heat exchanger 6b. Then, the cool air from the cooling heat exchanger 6b is blown out from the outlets 91 of the left duct 9b toward the left passenger seats 2, respectively.

  Along with this, the cold air from the cooling heat exchanger 6b flows into the air curtain duct 9e through the left duct 9b, and the cold air from each outlet 91 of the air curtain duct 9e is between the left passenger seat 2 and the exit area 3a. It is blown out toward the boundary. Further, the cold air from the cooling heat exchanger 6b flows into the exit duct 9d through the left duct 9b, and is blown out from each outlet 91 of the exit duct 9d to the exit area outlet 93.

  In addition, when the bus travels, the get-off switch is operated in order to inform the driver that the passenger will get off at the next stop. At this time, if the detected temperature of the outside air temperature sensor is equal to or higher than a certain temperature (25 ° C.), the electronic control unit 30 starts control of the getting-off mode.

  When the temperature detected by the outside air temperature sensor is lower than a certain temperature (25 ° C.), the control of the getting-off mode is not started. Further, when the getting-off switch is operated, a control circuit (not shown) informs the driver that the passenger is willing to get off at the next stop by a buzzer sound, sound and display.

  In the dismounting mode, the auxiliary blower 11 is operated. Further, the switching damper 12 is driven via the servo motor 12a to open the outside air inlet 94. Further, the switching damper 13 is driven via the servo motor 13a to close the space between the exit duct 9d and the left duct 9b.

  Then, the auxiliary blower 11 introduces the inside air from the inside air introduction port 92 and the outside air from the outside air introduction port 94 into the getting-off port duct 9d, and blows out the introduction outside air and the introduction inside air toward the plurality of outlets 91. Along with this, the introduced outside air and the introduced inside air are mixed and blown out from the outlet 91 toward the getting-off area 3a.

  Here, the air temperature in the passenger compartment of the bus approaches the set temperature by the air blown from the air outlets 91 of the ducts 9a, 9b, and 9e, and is lower than the outside air temperature. Therefore, warm air is introduced as the introduction outside air, cold air is introduced as the introduction inside air, and the warm air and the cold air are mixed by the auxiliary blower 11 and blown out from the outlet 91 toward the getting-off area 3a. Thereafter, the bus stops at the bus stop, and the exit door 3 is opened. Thereafter, the passenger gets off, and the exit door 3 is closed. At this time, when the door opening / closing sensor 34 detects the closing of the getting-off door 3, the electronic control unit 30 stops the getting-off mode control and starts the overall air-conditioning mode control.

  According to this embodiment described above, when the getting-off switch is operated by a passenger and the detected temperature of the outside air temperature sensor is equal to or higher than a certain temperature (25 ° C.), the outside air inlet 94 is opened by the switching damper 12, The space between the exit duct 9d and the left duct 9b is closed by the switching damper 13. Then, the auxiliary blower 11 mixes the inside air from the inside air introduction port 92 and the outside air from the outside air introduction port 94 and blows out from the plurality of outlets 93 toward the getting-off area 3a.

  Therefore, before the passenger gets off, the air temperature in the getting-off area 3a is warmed in comparison with the air temperature in the other area, so the temperature difference between the outside air temperature and the air temperature in the getting-off area 3a is made smaller than before. be able to. Therefore, the uncomfortable feeling (heat stress) that the passenger feels when going out of the passenger compartment through the exit door 3 can be reduced.

  Further, in the present embodiment, when controlling the air temperature in the dismounting area 3a to be warmed compared with the air temperature in other areas, the cold air from the cooling heat exchanger 6b is sent from each outlet 91 of the air curtain duct 9e. It blows out toward the boundary between the left passenger seat 2 and the disembarking area 3a. Therefore, it is possible to block warm air in the getting-off area 3a from flowing to other areas.

(Second Embodiment)
In the second embodiment, the boarding area 4a is cooled in comparison with other areas in conjunction with warming the air temperature in the getting-off area 3a.

  FIG. 4 shows the configuration of the bus air conditioner of this embodiment.

  In this embodiment, in addition to the configuration of the first embodiment described above, a boarding duct 9f, a switching damper 14, and an auxiliary blower 15 are added. The boarding duct 9f is configured to communicate with the central duct 9c, and includes air outlets 91 that open toward the boarding area 4a. The switching damper 14 is rotatably supported and opens and closes between the entrance duct 9f and the central duct 9c. The switching damper 14 is driven by a servo motor 14a. The auxiliary blower 15 is composed of an impeller and an electric motor that drives the impeller, and introduces cool air blown from each blower 10b in the central duct 9c into the entrance duct 9f.

  In the overall air conditioning mode of the present embodiment configured as described above, the auxiliary blower 15 is stopped and the switching damper 14 is controlled via the servo motor 14a to close the space between the entrance duct 9f and the central duct 9c. .

  In the dismounting mode, the auxiliary blower 15 is operated and the switching damper 14 is controlled via the servo motor 14a to open the space between the entrance duct 9f and the central duct 9c.

  Along with this, the auxiliary blower 15 introduces the cold air that has passed through the cooling heat exchanger 6b in the central duct 9c into the entrance duct 9f. Then, cold wind is blown out toward the boarding area 4a from each outlet 91 of the boarding duct 9f. Therefore, the boarding area 4a is temporarily cooled compared to other areas, and the cooling feeling is increased. For this reason, when the passenger boarding door 4 of the bus is opened at the bus stop and the customer gets on, a comfortable feeling can be given to the customer.

(Other embodiments)
In each of the above-described embodiments, the configuration in which the heat exchanger for heating using the cooling heat exchangers 6a and 6b is not used as the air conditioner for the bus has been described. However, the configuration is not limited thereto, and the heat exchanger for cooling 6a is not limited thereto. 6b and a heating heat exchanger may be used.

  In the above-described embodiment, the example using the butterfly door (plate door) in which the rotation shaft is arranged at the central portion of the plate portion as the switching damper has been described, but not limited to this, FIG. As shown in b), the switching damper may be configured by providing two cantilever doors 40 each having a rotating shaft 41 disposed at the end of the plate portion 42.

  Further, as shown in FIGS. 5A and 5B, a plurality of butterfly doors 43 (four in the figure) may be provided to constitute a switching damper.

  Hereinafter, the correspondence relationship between the above-described embodiment and the configuration within the scope of the claims will be described. The air-conditioning means includes the air-conditioning duct 9, the cooling heat exchangers 6 a and 6 b, the fans 10 a, 10 b, 11, and 15, and the switching damper 12. , 13, 14 and servo motors 12a, 13a, 14a.

  The electronic control device 30 corresponds to the control means, the inside air introduction port 92 corresponds to the first inside air introduction port, and the first air conditioning duct includes the right side duct 9a, the left side duct 9b, and the central duct 9c. The inside air introduction port 95 corresponds to a second inside air introduction port, the outside air introduction port 94 corresponds to an outside air introduction port, the air outlet 91 of the exit port duct 9d corresponds to an exit area air outlet, and the auxiliary blower 11 assists. The switching damper 12 corresponds to the first opening / closing means, the air outlet 91 of the boarding duct 9f corresponds to the boarding area air outlet, the switching damper 14 corresponds to the second opening / closing means, and corresponds to the air opening. The duct 9f corresponds to a third air conditioning duct.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the whole structure of 1st Embodiment of the air conditioner for buses of this invention. It is a figure which shows the refrigerating-cycle apparatus and electrical structure of the air conditioner for buses of FIG. It is a chart for demonstrating the action | operation of the bus air conditioner of FIG. It is a figure which shows the whole structure of 2nd Embodiment of the air conditioner for buses of this invention. It is a figure which shows the door of the modification of this invention. It is a figure which shows the door of the modification of this invention.

Explanation of symbols

3a: Alighting area, 9, 9a, 9b, 9c, 9d, 9f, 9e ... Air conditioning duct,
6a, 6b ... heat exchanger for cooling, 10a, 10b ... blower,
11a ... electromagnetic clutch, 20 ... compressor, 21 ... condenser, 22 ... gas-liquid separator,
23 ... Supercooler, 24 ... Expansion valve, 30 ... Electronic control device, 31 ... Sensor group,
32 ... Alighting switch, 33 ... Control panel, 92 ... Inside air inlet,
94: Outside air introduction port, 95 ... Inside air introduction port.

Claims (6)

A bus air conditioner that is applied to a bus provided with a getting-off switch that is operated to convey to the driver the intention of the passenger to get off, and that air-conditions the passenger compartment,
Air conditioning means for adjusting the air condition in the passenger compartment;
The air conditioning means is controlled in accordance with the getting-off signal output from the getting-off switch, and prior to the passenger getting off, the air temperature in the getting-off area located in the vicinity of the getting-off door in the passenger compartment is set in the getting-off area. Control means for raising the air temperature in other areas other than
A bus air conditioner comprising: It has an outside air temperature sensor that detects the outside air temperature,
The said control means makes the air temperature of the said alighting area higher than the air temperature of other areas other than the alighting area only when the temperature detected by the outside air temperature sensor is a constant temperature. The air conditioner for buses according to 1. The air conditioning means includes:
A first air-conditioning duct comprising: a first room air inlet for introducing room air; and a first air outlet for blowing air to the other area;
A main blower for introducing and blowing the inside air from the first inside air inlet;
A cooling heat exchanger that is disposed in the first air conditioning duct and cools air blown from the main blower,
Cold air from the cooling heat exchanger is blown out from the first air outlet toward the vehicle interior,
A second air conditioning duct having a second inside air introduction port for introducing inside air, an outside air introduction port for introducing outside air, and a dismounting area outlet for blowing air to the dismounting area;
An auxiliary blower for introducing and blowing the inside air from the second inside air introduction port and the outside air from the outside air introduction port,
The control means controls the auxiliary blower to mix the inside air introduced from the second inside air introduction port and the outside air introduced from the outside air introduction port, and blow out from the getting off area outlet to the getting off area. The air conditioner for buses according to claim 1 or 2, wherein an air temperature in the dismounting area is set higher than an air temperature in the other area. The first air conditioning duct is provided with a boundary air outlet that blows air to a boundary between the dismounting area and the other area,
When the control means controls the air conditioning means to make the air temperature in the dismounting area higher than the air temperature in the other area, the control means controls the main blower and the cooling heat exchanger The air conditioning apparatus for buses according to any one of claims 1 to 3, wherein cold air from the air is blown out from the boundary outlet to the boundary. The first and second air conditioning ducts are configured to communicate with each other,
Between the first and second air conditioning ducts, there is provided first opening / closing means for opening and closing between the first and second air conditioning ducts,
When the control means controls the air conditioning means to make the air temperature in the dismounting area higher than the air temperature in the other area, the control means controls the first opening / closing means to The bus air conditioner according to claim 3 or 4, wherein a space between the first and second air conditioning ducts is closed. The air conditioning means includes:
A third duct having a boarding area outlet that communicates with the first air conditioning duct and blows out cool air from the cooling heat exchanger in a boarding area located near the boarding door;
Second opening and closing means for opening and closing between the first and third air conditioning ducts,
The control means controls the second opening and closing means to control the air conditioning means to control the second opening / closing means when the air temperature in the dismounting area is higher than the air temperature in the other area. 6. The bus air conditioner according to claim 1, wherein a space between the three air conditioning ducts is opened.

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