JP3654310B2 - Air conditioner for vehicles - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicle air conditioner mounted on a large vehicle such as a bus vehicle or a railway vehicle, and more particularly to a bus vehicle air conditioner capable of realizing zone air conditioning in the vehicle.
[0002]
[Prior art]
Conventionally, for example, in an air conditioner for a bus vehicle mounted on a bus vehicle, as shown in FIG. 10, eight cooling units 102 are distributed and arranged on the left and right shoulders of the ceiling of the bus vehicle 101. The four-zone air conditioning A to D corresponding to these cooling units 102 is realized (conventional example: Japanese Patent Laid-Open No. 4-55116). Thereby, in this air conditioning apparatus for bus vehicles, even if the cooling load for each zone A to D differs due to changes in the traveling direction of the bus vehicle, changes in weather, etc. The comfort of passengers such as passengers and passengers is improved by adjusting the temperature independently for each of the zones .about.D.
[0003]
[Problems to be solved by the invention]
However, in the conventional air conditioner for bus vehicles, in order to realize quadrant zone air conditioning, eight cooling units are dispersedly arranged on both shoulders of the ceiling of the bus vehicle. For this reason, the number of parts is large, and the number of mounting steps such as the refrigerant pipes connecting the refrigerant evaporators and the refrigerant compressor and the refrigerant pipes connecting the refrigerant evaporators and the expansion valves are increased. The problem of rising is occurring.
[0004]
OBJECT OF THE INVENTION
The present invention pays attention to the point that it takes heat of vaporization when water evaporates, and by arranging a humidifying unit for each of a plurality of ventilation paths, the structure of the vehicle air conditioner can be simplified and inexpensively. The purpose is to enable zone air conditioning. It is another object of the present invention to improve the comfort of passengers such as passengers and passengers.
[0005]
[Means for Solving the Problems]
  According to the first aspect of the present invention, at least one air conditioning unit that air-conditions a plurality of zones provided in a vehicle, and a plurality of ventilations for sending air from the one air conditioning unit toward the plurality of zones. A humidifying unit that has a plurality of humidifier bodies that are provided for each of the plurality of ventilation paths and that supplies humidified air to each of the plurality of ventilation paths, and each of the plurality of zones. A plurality of air conditioning load detecting means for detecting each air conditioning load; and the plurality of air conditioning loads when the one air conditioning unit is operated so that a cooling state of the entire plurality of zones is adjusted to a set temperature. Based on the air conditioning load detected by the detection means, when the cooling load of a specific zone of the plurality of zones is increased from the cooling load of other zones, the specific humidifier body among the plurality of humidifier bodies. zone And a air-conditioning control means for selectively actuating said humidifier body that is disposed on the ventilation path to send the air towards,
  The one air conditioning unit includes a unit case for sucking air and an evaporator housed in the unit case, and the plurality of ventilation paths are extended from the unit case, and the evaporator in the unit case The cooled cold air is sent to the plurality of zones when passing throughAdopted technical means.
[0006]
  The invention according to claim 2 is a single cooler body that cools air passing through the single air conditioning unit and condenses moisture in the air.(Evaporator in unit case)And a blower for a cooler that sends air that has passed through the cooler body to a plurality of zones, and the like,
  A water supply tank that stores condensed water condensed by the cooling action of the cooler body, and a plurality of ultrasonic vibrators that generate ultrasonic waves in the water in the plurality of humidifier bodies that communicate with the water supply tank. It is characterized by comprising.
[0007]
The invention according to claim 3 is characterized in that the plurality of humidifier bodies are intermittently operated so as to intermittently supply humidified air into the plurality of ventilation paths.
The invention according to claim 4 is characterized in that the plurality of air conditioning load detection means, a plurality of inside air temperature detection means for detecting the inside air temperature for each of the plurality of zones, and a plurality of solar radiation amounts for each of the plurality of zones. It is characterized by comprising solar radiation detection means and the like.
[0008]
[Operation and effect of the invention]
  According to the first aspect of the invention, by operating at least one air conditioning unit, the conditioned air is blown out for each of the plurality of zones through the plurality of ventilation paths, and the plurality of zones are air-conditioned.That is, the cold air cooled when passing through the evaporator in the unit case is blown out for each of a plurality of zones through a plurality of ventilation paths, and the plurality of zones are cooled.At this time, when the cooling load of a specific zone among a plurality of zones is increased from the cooling load of other zones, the plurality of humidifier bodies are arranged in a ventilation path that sends air toward the specific zone. Selectively actuate the humidifier body. Thereby, the heat of vaporization is deprived in the ventilation path, and the temperature of the conditioned air blown out to the specific zone is lowered, so that comfort is maintained. In addition, since multiple air-conditioning units can be used with one air conditioning unit, the number of air conditioning units installed to air-condition the entire vehicle is reduced, and the number of bodywork such as connecting piping for the air conditioning unit is reduced. Product cost of the harmony device can be reduced.
[0009]
According to the invention described in claim 2, the number of times of water supply to the water supply tank is reduced by using the condensed water generated by the cooling action of one cooler body of the air conditioning unit as the humidifying source of the humidifying unit. can do.
According to the third aspect of the present invention, since humidified air is intermittently supplied into the ventilation path, air conditioning with a feeling of fluctuation can be performed, and comfort can be further improved.
According to the invention described in claim 4, since the air conditioning load is detected using the inside air temperature detecting means and the solar radiation detecting means for each of the plurality of zones, the air conditioning of each zone is independently performed based on the detected air conditioning load. Thus, optimal zone air conditioning can be performed.
[0010]
【Example】
[Configuration of the first embodiment]
FIGS. 1 to 7 show a first embodiment of the present invention. FIG. 1 is an explanatory view of four-zone air conditioning of a cooling system for a bus vehicle. FIG. 2 is a bus vehicle equipped with a cooling system for a bus vehicle. FIG. 3 is a diagram showing a refrigeration cycle of a cooling system for a bus vehicle.
[0011]
As shown in FIG. 1, the bus vehicle cooling device 1 includes a front left section (A), a front right section (B), a rear left section (C), and a rear side in the traveling direction of the bus vehicle 2. It is a bus air conditioner capable of independently cooling the right section (D), that is, capable of quadrant zone air conditioning.
[0012]
As shown in FIG. 1 to FIG. 3, the bus vehicle cooling device 1 includes two cold air ducts 3 a and 3 b installed on the left shoulder and the right shoulder in the traveling direction of the bus vehicle 2, In order to independently cool the left room and the right room of the bus vehicle 2, two sets of refrigeration cycles 4a and 4b mounted on the left and right sides of the bus vehicle 2 and four-zone air conditioning are possible. Two sets of humidification units 5a and 5b mounted on the left and right sides of the bus vehicle 2, and an air conditioner control device 6 (see FIG. 7) for controlling the two sets of refrigeration cycles 4a and 4b and the two sets of humidification units 5a and 5b. It has.
[0013]
As shown in FIGS. 1 and 2, the two cold air ducts 3 a and 3 b include a front duct 11 a extending from the center of the bus vehicle 2 to the front side along the left ceiling shoulder and the right ceiling shoulder. 11b, and rear ducts 11c and 11d extending rearward from the central portion of the bus vehicle 2 along the left and right ceiling shoulders. The front ducts 11a and 11b and the rear ducts 11c and 11d are appropriately provided with a plurality of cold air outlets (not shown) that open toward the heads of the passengers, and the front ventilation paths 12a and 12b are provided inside. And the rear side ventilation paths 12c and 12d are formed.
[0014]
As shown in FIG. 3, each refrigeration cycle 4a, 4b includes refrigerant compressors 13a, 13b, refrigerant condensers 14a, 14b, liquid receivers 15a, 15b, dryers 16a, 16b, expansion valves 17a, 17b, refrigerant evaporation. The refrigerating cycle devices of the containers 18a and 18b are sequentially connected by refrigerant pipes 19a and 19b made of metal pipes or rubber pipes, respectively.
[0015]
As shown in FIG. 2, the refrigerant compressors 13 a and 13 b include a belt and an electromagnetic clutch (both not shown) in a vehicle travel engine (main engine) installed in the engine room at the rear of the bus vehicle 2. It is connected through. When the rotational power of the engine is transmitted, the refrigerant compressors 13a and 13b compress the gas refrigerant (gas phase refrigerant) sucked into the inside from the suction port, and discharge the high-temperature and high-pressure gas refrigerant from the discharge port. It is. Instead of the refrigerant compressors 13a and 13b, an electric compressor whose rotation speed is controlled by an air conditioner inverter may be used. A variable displacement compressor may be used.
[0016]
The refrigerant condensers 14a and 14b are installed as a condensing unit together with a condenser fan (cooling fan, condenser fan) 20 in a place where the traveling air of the bus vehicle 2 is easily received, in this example, under the floor on the front side of the bus vehicle 2. Yes. The refrigerant condensers 14a and 14b are condensers that condense and liquefy the refrigerant by exchanging heat between the gas refrigerant flowing in from the discharge ports of the refrigerant compressors 13a and 13b with the outdoor air sent to the condenser fan 20 and the like. The condenser fan 20 is an axial flow fan, a centrifugal fan, or the like.
[0017]
The liquid receivers 15a and 15b are receivers that temporarily store the refrigerant so that the refrigerant flowing in from the refrigerant condensers 14a and 14b can be supplied to the refrigerant evaporators 18a and 18b in response to the cooling load. The liquid receivers 15a and 15b separate the refrigerant flowing from the refrigerant condensers 14a and 14b into gas refrigerant and liquid refrigerant, and supply only the liquid refrigerant to the refrigerant evaporators 18a and 18b. Note that gas-liquid separation means such as an accumulator may be used instead of the liquid receivers 15a and 15b. In addition, the liquid receivers 15a and 15b may not be provided as long as the refrigerants are refrigeration cycles 4a and 4b in which the refrigerant is completely liquefied on the outlet side of the refrigerant condensers 14a and 14b.
The dryers 16a and 16b are for removing moisture in the refrigeration cycles 4a and 4b, and contain a large number of fluorocarbon refrigerant desiccants therein.
[0018]
The expansion valves 17a and 17b are decompression devices that are expanded by injecting high-temperature and high-pressure liquid refrigerant from a small throttle hole to form a low-temperature and low-pressure mist refrigerant (a gas-liquid two-phase refrigerant). A temperature-actuated expansion valve that automatically adjusts the valve opening so as to maintain the refrigerant superheat degree on the outlet side of the evaporators 18a and 18b at a predetermined value is used. Here, 21a and 21b are temperature sensing cylinders for detecting the refrigerant temperature on the outlet side of the refrigerant evaporators 18a and 18b, and are connected to the expansion valves 17a and 17b via the capillary tubes 22a and 22b. A fixed throttle such as an orifice or a capillary tube may be used instead of the expansion valves 17a and 17b.
[0019]
The refrigerant evaporators 18a and 18b are the cooler main body of the present invention, and are installed in the central portions of the cold air ducts 3a and 3b as cooling units 24a and 24b together with the evaporator blowers 23a and 23b, respectively. The refrigerant evaporators 18a and 18b are evaporators that evaporate the refrigerant by exchanging heat between the mist refrigerant flowing in from the expansion valves 17a and 17b with the inside air or the outside air sucked in by the evaporator blowers 23a and 23b.
[0020]
The evaporator blowers 23a and 23b are the cooler blower according to the present invention, and are installed near the front side of the bus vehicle 2 and the two front evaporator fans 25a and 25b and the rear side of the bus vehicle 2. The two rear evaporator fans 25c and 25d are respectively configured. The two front evaporator fans 25a and 25b are front centrifugal fans (front centrifugal blowers) that generate an air flow toward the room in the front ventilation paths 12a and 12b of the front ducts 11a and 11b. The two rear evaporator fans 25c and 25d are rear centrifugal fans (rear centrifugal fans) that generate an air flow toward the room in the rear ducts 12c and 12d of the rear ducts 11c and 11d. is there.
[0021]
The cooling units 24a and 24b are air conditioning units according to the present invention, and as shown in FIGS. 4 and 5, a unit case (not shown) installed at the center of the cold air ducts 3a and 3b, It is composed of one refrigerant evaporator 18a, 18b, four front evaporator fans 25a, 25b, rear evaporator fans 25c, 25d, an inside / outside air switching door (not shown) and the like housed in the unit case. ing.
[0022]
The unit case has an indoor air inlet (not shown) for taking in indoor air (inside air) and an outdoor air inlet (not shown) for taking in outdoor air (outside air). The mouth is closed by the inside / outside air switching door. Note that a total of two cooling units 24 a and 24 b as described above are installed on each of the left and right sides of the bus vehicle 2.
[0023]
The two sets of humidifying units 5a and 5b are provided with a total of four humidifier bodies 31a to 31d, two on each of the left and right sides of the bus vehicle 2, respectively. The two sets of humidification units 5a and 5b are configured by humidifier bodies 31a to 31d, water supply tanks 32a and 32b, drain hoses 33a and 33b, water absorption hoses 34a to 34d, water absorption pumps 35a to 35d, and the like.
[0024]
As shown in FIGS. 6 (a) and 6 (b), the humidifier bodies 31a to 31d receive water from the water tanks 32a and 32b having a predetermined capacity and keep the liquid level at a predetermined level. Ultrasonic transducers 36a to 36d that generate ultrasonic waves so as to focus on the vicinity are provided. The ultrasonic vibrators 36a to 36d are electrostrictive vibrators that are embedded in the bottom wall portions of the humidifier bodies 31a to 31d and have electrodes baked onto both surfaces of, for example, a barium titanate-based piezoelectric element. The battery 37 (see FIG. 7). It is a circular thin plate that generates ultra-high speed vibration when supplied with more power.
[0025]
The water supply tanks 32a and 32b basically supply tap water to the inside, but as shown in FIG. 5, the water adhering to the refrigerant evaporators 18a and 18b by the cooling action of the refrigerant evaporators 18a and 18b. Is replenished via drain hoses 33a and 33b and temporarily stored.
The drain hoses 33a and 33b are replenishing means for supplying condensed water from a drain pan (not shown) provided at the lower part of the refrigerant evaporators 18a and 18b to the water supply tanks 32a and 32b.
[0026]
The water absorption hoses 34a to 34d are replenishing means for supplying water from the water supply tanks 32a and 32b to the humidifier bodies 31a to 31d. The water absorption pumps 35a to 35d are electric pumps that pump the water in the water supply tanks 32a and 32b into the humidifier bodies 31a to 31d when energized.
Here, the cold air ducts 3a and 3b, the cooling units 24a and 24b, and the humidifying units 5a and 5b are mounted on the bus vehicle 2 so as to be symmetrical.
[0027]
As shown in FIG. 7, the air conditioner control device 6 operates when a predetermined voltage is applied from the battery 37 mounted on the bus vehicle 2. The air conditioner control device 6 is a microcomputer including a CPU, a ROM, a RAM and a timer circuit, and is electrically connected with an air conditioner switch 38, a temperature setting volume 39, internal temperature sensors 41a to 41d, solar radiation sensors 42a to 42d, and the like. Yes.
[0028]
Then, the air conditioner control device 6 uses the air conditioner switch 38, the temperature setting volume 39, the internal air temperature sensors 41a to 41d, the solar radiation sensors 42a to 42d, and the like, the electromagnetic clutches of the refrigerant evaporators 18a and 18b, and the water absorption pump 35a. The ultrasonic transducers 36a to 36d and the like are controlled by energizing the relay coils 43a to 43d.
[0029]
The air conditioner switch 38 is a cooling operation command means for commanding activation and stop of the bus vehicle cooling device 1.
The temperature setting volume 39 is a temperature setting means for setting the interior of the bus vehicle 2 to a desired temperature.
The inside air temperature sensors 41a to 41d are air conditioning load detecting means according to the present invention, and are comprised of, for example, a thermistor or the like and detect the inside air temperature (room air temperature) for each zone of the bus vehicle 2 from A to D. It is.
[0030]
The solar radiation sensors 42a to 42d are air conditioning load detection means of the present invention, and are installed inside the side windows provided on the side wall surfaces of the zones A to D of the bus vehicle 2, and It is a solar radiation detection means which detects the solar radiation amount for each zone.
The relay coils 43a to 43d open and close relay switches 44a to 44d for energizing the ultrasonic transducers 36a to 36d. In place of such a relay circuit, a semiconductor switching circuit such as a transistor or FET may be used.
[0031]
[Operation of the first embodiment]
Next, the operation of the bus vehicle cooling device 1 of this embodiment will be briefly described with reference to FIGS. When the air conditioner switch 38 is turned on, the electromagnetic clutches of the refrigerant compressors 13a and 13b, the condenser fan 20, and the evaporator blowers 23a and 23b are energized to start the operation of the bus vehicle cooling apparatus 1.
[0032]
The high-temperature and high-pressure gas refrigerant compressed and discharged in the refrigerant compressors 13a and 13b flows into the refrigerant condensers 14a and 14b, and exchanges heat with outdoor air when passing through the refrigerant condensers 14a and 14b. The liquid is condensed and flows into the liquid receivers 15a and 15b. The liquid refrigerant separated from the gas and liquid in the liquid receivers 15a and 15b and discharged from the liquid receivers 15a and 15b is dehydrated and depressurized by the expansion valves 17a and 17b after the moisture is removed by the dryers 16a and 16b. It flows into the refrigerant evaporators 18a and 18b.
[0033]
When the refrigerant flowing into the refrigerant evaporators 18a and 18b passes through the refrigerant evaporators 18a and 18b, the indoor air or the outdoor air sucked into the unit cases 29a and 29b by the operation of the evaporator blowers 23a and 23b. After evaporating and evaporating, the refrigerant is sucked into the refrigerant compressors 13a and 13b from the suction port. At this time, when the indoor air or the outdoor air is cooled to the dew point temperature or lower when passing through the refrigerant evaporators 18a and 18b, moisture in the air is condensed and water droplets adhere to the refrigerant evaporators 18a and 18b. The water droplets (condensed water) are supplied to the water supply tanks 32a and 32b of the humidifying units 5a and 5b by the drain hoses 33a and 33b.
[0034]
Here, the air flow (cold air) cooled when passing through the refrigerant evaporator 18a of the cooling unit 24a mounted on the left side of the bus vehicle 2 is caused by the two front evaporator fans 25a of the evaporator blower 23a. The zone A of the bus vehicle 2 is cooled by blowing from the unit case through the front side air passage 12a of the front side duct 11a to the head of the passenger in the zone A from each cold air outlet. Further, the cold air flowing out from the refrigerant evaporator 18a is passed through the rear air passage 12c from the unit case by the two rear evaporator fans 25c of the evaporator air blower 23a from each cold air outlet through the rear duct 11c. The C zone of the bus vehicle 2 is cooled by being blown to the head of the passenger in the C zone.
[0035]
Similarly, the air flow (cold air) cooled when passing through the refrigerant evaporator 18b of the cooling unit 24b mounted on the right side of the bus vehicle 2 is similarly used for the two front evaporator fans 25b and 2. It flows out of the unit case by the rear evaporator fan 25c of the base, passes through the front ventilation path 12b of the front duct 11b and the rear ventilation path 12d of the rear duct 11d, and from each of the cold wind outlets to the zones B and D. The B zone and D zone of the bus vehicle 2 are cooled by being blown out to the heads of the passengers in the zone.
[0036]
  Here, when the set temperature of the entire passenger compartment of the bus vehicle 2 does not match the passenger's feeling, the occupant operates the temperature setting volume 39 to the strong cooling side or the weak cooling side. As a result, the electrical resistance value of the temperature setting volume 39 changes, and the combined resistance value of all the internal air temperature sensors 41a to 41d and the temperature setting volume 39 changes, and a cooling state based on the combined resistance value is achieved. By turning on and off the electromagnetic clutches of the refrigerant compressors 13a and 13b, or by changing the amount of air blown by the blower devices 23a and 23b for the evaporator,Across multiple zones (Zone A to Zone D)The air conditioner is finely adjusted to the changed set temperature.Enables four-zone air conditioningThe
[0037]
  Note that the cooling load of each of the zones A to D varies depending on a change in the traveling direction of the bus vehicle 2 or a change in weather such as cloudy to sunny or cloudy to cloudy. For exampleOf the zones that divided the interior of the bus vehicle 2 into fourIn the case where the cooling load of the zone D increases from the other zones A to C, that is, the detected value of the inside air temperature sensor 41d (the inside air temperature of the zone D) is the other inside air temperature sensors 41a to 41c. If the detection value of the solar radiation sensor 42d (the solar radiation amount of the zone D) is larger than the detection values of the other solar radiation sensors 42a to 42c, the humidifying unit 5b on the right side of the bus vehicle 2 is higher. Only the ultrasonic transducer 36d is operated. When the ultrasonic vibrator 36d operates, the water in the humidifier body 31d vibrates and evaporates.
[0038]
  Thereby, the cold air flowing out from the refrigerant evaporator 18b of the cooling unit 24b is deprived of vaporization heat by the water vapor generated in the humidifier body 31d when passing through the rear ventilation path 12d of the rear duct 11d, and the temperature of the cold wind Go down. Therefore,Even if the cooling load of the zone D among the plurality of zones obtained by dividing the room of the bus vehicle 2 into four zones is higher than the other zones A to C, the humidifying unit 5b on the right side of the bus vehicle 2 By operating only the ultrasonic transducer 36d ofThe temperature of the cold air blown out from each cold air outlet to the head of the passenger in the zone D decreases.ForThe passenger comfort in the zone D of the bus vehicle 2 is maintained. In other words, the zones A to C can be independently cooled by operating the humidifier bodies 31a to 31c independently of the other zones A to C.
[0039]
[Effects of the first embodiment]
As described above, the bus vehicle cooling device 1 can realize four-zone air conditioning by the two cooling units 24a and 24b and the four humidifier bodies 31a to 31d. As a result, the number of mounted cooling units for cooling the entire passenger compartment of the bus vehicle 2 can be reduced. That is, since the number of refrigerant evaporators 18a and 18b can be set to two, the structure of the bus vehicle cooling device 1 can be simplified.
[0040]
Therefore, refrigerant pipes 19a and 19b connecting the refrigerant evaporators 18a and 18b and the refrigerant compressors 13a and 13b, and refrigerant pipes 19a and 19b connecting the refrigerant evaporators 18a and 18b and the expansion valves 17a and 17b. It is possible to reduce the number of bodywork man-hours. Thereby, since the product cost of the cooling device 1 for bus vehicles can be reduced, the price of the bus vehicle 2 provided with the cheap cooling device 1 for bus vehicles can be reduced.
[0041]
Further, the condensed water (drain water) discharged from the refrigerant evaporators 18a and 18b of the two cooling units 24a and 24b is stored in the water supply tanks 32a and 32b via the drain hoses 33a and 33b, thereby providing the water supply tank 32a. , 32b, the number of tap water supply times can be reduced.
[0042]
[Configuration of Second Embodiment]
FIG. 8 shows a second embodiment of the present invention, and shows a refrigeration cycle. In this embodiment, the refrigeration cycle 4 in which the refrigerant is circulated to the two refrigerant evaporators 18 a and 18 b by one refrigerant compressor 13 is mounted on the bus vehicle 2. The refrigeration cycle 4 is a receiver cycle, and includes a refrigerant compressor 13, a refrigerant condenser 14, a liquid receiver 15, a dryer 16, expansion valves 17a and 17b, refrigerant evaporators 18a and 18b, and refrigerant piping that sequentially connects them. 19 etc.
[0043]
[Configuration of Third Embodiment]
FIG. 9 shows a third embodiment of the present invention and is a time chart showing fluctuation control of the air conditioner control device. In this embodiment, as shown in FIG. 9, the ultrasonic transducers 36a to 36d incorporated in the humidifier bodies 31a to 31d of the humidifying units 5a and 5b are energized (on) intermittently and the energization is stopped ( By turning off, the temperature of the air blown out from the air outlet is raised and lowered. As a result, it is possible to supply a cold air with a feeling of fluctuation, so that the comfort of the passenger's cooling feeling can be improved.
[0044]
[Modification]
In this embodiment, the present invention is mounted on the bus vehicle 2, but the present invention may be mounted on a large vehicle such as a railway vehicle or another vehicle such as an ordinary passenger car.
In this embodiment, the present invention is applied to the air conditioner 1 for a bus vehicle, but the present invention may be applied to a vehicle air conditioner, a vehicle dehumidifier, and a vehicle heater.
[0045]
In this embodiment, two humidifier bodies 31a to 31d are provided in each of the two sets of humidifier units 5a and 5b, but three or more humidifier bodies may be provided in one set of humidifier units.
Further, in the case where only the two left and right zones are sufficient, it is possible to cope by mounting the cooling unit on the front side portion or the rear side portion of the vehicle. Thereby, there exists an advantage which can reduce the number of humidifier main bodies and sensors of a humidification unit.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of four-zone air conditioning in a cooling system for a bus vehicle (first embodiment).
FIG. 2 is a perspective view showing a bus vehicle (first embodiment).
FIG. 3 is a configuration diagram showing a refrigeration cycle (first embodiment).
FIG. 4 is a schematic view showing a cooling unit (first embodiment).
FIG. 5 is a schematic view showing a cooling unit and a humidifier body (first embodiment).
6A and 6B are cross-sectional views showing a humidifier body (first embodiment).
FIG. 7 is an electric circuit diagram of the air conditioner control device (first embodiment).
FIG. 8 is a configuration diagram showing a refrigeration cycle (second embodiment).
FIG. 9 is a time chart showing fluctuation control of the air conditioner control device (third embodiment).
FIG. 10 is an explanatory diagram of four-zone air conditioning of a bus vehicle air conditioner (conventional example).
[Explanation of symbols]
1 Air conditioner for bus vehicles (air conditioner for vehicles)
6 Air conditioner control device (air conditioning control means)
3a, 3b Cold air duct
4a, 4b Refrigeration cycle
5a, 5b Humidification unit
12a, 12b Front side ventilation path
12c, 12d Rear air passage
18a, 18b Refrigerant evaporator (cooler body)
23a, 23b Evaporator blower (cooler blower)
24a, 24b Cooling unit (air conditioning unit)
31a-31d Humidifier body
32a, 32b Water supply tank
36a-36d ultrasonic transducer
41a-41d Inside air temperature sensor (air conditioning load detecting means, inside air temperature detecting means)
42a to 42d solar radiation sensor (air conditioning load detection means, solar radiation detection means)

Claims (4)

(A) at least one air conditioning unit that air-conditions a plurality of zones provided in the vehicle;
(B) a plurality of ventilation paths for sending air from the one air conditioning unit to the plurality of zones;
(C) a humidifying unit that is provided for each of these ventilation paths and has a plurality of humidifier bodies that supply humidified air for each of the plurality of ventilation paths;
(D) a plurality of air conditioning load detection means arranged for each of the plurality of zones and detecting an air conditioning load for each of the plurality of zones;
(E) When operating the one air conditioning unit so that the cooling state of the entire plurality of zones is adjusted to a set temperature, based on the air conditioning load detected by the plurality of air conditioning load detection means, When the cooling load of a specific zone among a plurality of zones increases from the cooling load of other zones, the plurality of humidifier bodies are arranged in the ventilation path that sends air toward the specific zone Air conditioning control means for selectively actuating the humidifier body ,
The one air conditioning unit is composed of a unit case into which air is sucked, an evaporator housed in the unit case,
The plurality of ventilation paths are extended from the unit case, and cool air that is cooled when passing through an evaporator in the unit case is sent to the plurality of zones . The vehicle air conditioner according to claim 1,
The evaporator in the unit case is a single cooler body that cools the air passing therethrough and condenses moisture in the air,
Wherein one of the air conditioning unit has a cooler blower sending air passing through the cooler body into a plurality of zones,
The humidification unit includes a water supply tank that stores condensed water condensed by the cooling action of the cooler body, and a plurality of ultrasonic vibrators that generate ultrasonic waves in the water in the plurality of humidifier bodies that communicate with the water supply tank. A vehicle air conditioner characterized by comprising: The vehicle air conditioner according to claim 1 or 2,
The vehicle air conditioner characterized in that the plurality of humidifier bodies supply humidified air intermittently into the plurality of ventilation paths. The vehicle air conditioner according to any one of claims 1 to 3,
The plurality of air conditioning load detection means includes a plurality of internal air temperature detection means for detecting an internal air temperature for each of the plurality of zones, and a plurality of solar radiation detection means for detecting an amount of solar radiation for each of the plurality of zones. A vehicle air conditioner.

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