JPS63116925A - Air ventilating device for vehicle - Google Patents

Abstract

PURPOSE:To improve intake efficiency of the open air by providing an opening which communicates with the inside of a car at the position of the generation of negative pressure on the upper stream side of a heat exchanger outside the car, and by discharging the air in the car forcibly. CONSTITUTION:When the open air is led through an air filter 364, blowers 440 and 450 suck in the inside air and the open air taken in from an inside air introduction port 340 and an open air introduction port 360 and blow them out into a car through ducts 510 and 520. On the other hand, a blower 420 sucks in the open air from an open air communication port 310 and sucks in the air in the car from an opening 320 and emits it from an air exit 330. Accordingly, as the inside air is forcibly emitted from the opening 320 by the operation of the blower 420 and raise of the atmospheric pressure in the car is suppressed, the open air can be effectively sucked in the car.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a vehicle air conditioner capable of introducing air from outside the vehicle interior into the vehicle interior.

[Prior Art] A vehicle air conditioner generally includes an outside air introducing means for selectively introducing air outside the vehicle interior (outside air) into the vehicle interior, and introduces the outside air into the vehicle interior depending on the driving mode.

However, since the interior of a vehicle such as a pass vehicle or a railway vehicle is extremely airtight, when outside air is supplied into the vehicle interior, the air pressure within the single compartment increases and the outside air intake efficiency decreases.

Therefore, in the past, an exhaust port was installed in a part of the vehicle to exhaust the air inside the vehicle (inside air) by increasing the pressure inside the vehicle.
Alternatively, a dedicated ventilation fan was installed to release the air inside the vehicle outside the vehicle, and this fan was used to forcibly exhaust the air inside the vehicle to lower the blank air pressure and improve the efficiency of intake of outside air.

[Problems to be solved by the invention] However, when a vehicle is equipped with a dedicated ventilation fan,
It is necessary to find a space to install a dedicated ventilation fan in a narrow vehicle space, which makes it very difficult to mount the vehicle.In addition, the manufacturing cost of the vehicle increases as the ventilation dedicated fan is installed in the vehicle. It was equipped with

In addition, when installing an exhaust port on a vehicle, the internal pressure inside the vehicle is higher than when the vehicle is equipped with a blower exclusively for ventilation. The problem was that the inhalation efficiency was reduced.

The present invention has been made in view of the above circumstances, and its purpose is to forcibly exhaust the air inside the vehicle to the outside of the vehicle when outside air is introduced, without installing a dedicated ventilation fan in the vehicle. An object of the present invention is to provide a vehicle air conditioner that can improve efficiency.

[Means for Solving the Problems] In order to achieve the above object, the present invention includes an exterior heat exchanger equipped with a blower and an outside air inlet that can introduce air from outside the vehicle interior into the vehicle interior. In the air conditioner for a vehicle, the technical means is that an opening communicating with the vehicle interior is provided at a position where negative pressure is generated upstream of the blower and upstream of the vehicle exterior heat exchanger. .

[Function] An opening that communicates with the vehicle interior is provided on the upstream side of the blower and at a position where negative pressure is generated on the upstream side of the outdoor heat exchanger, and when the blower of the outdoor heat exchanger is operated, the blower opens through the opening. The air inside the vehicle is sucked in through the air exchanger, and heat is exchanged between the outdoor heat exchanger and the air inside the vehicle.

Then, the air inside the vehicle that has exchanged heat with the outdoor heat exchanger is discharged to the outside of the vehicle.

[Effects of the Invention] According to the present invention, when the blower of the outdoor heat exchanger operates,
By exhausting the air inside the vehicle to the outside of the vehicle, the air pressure inside the vehicle decreases, so that it is possible to improve the efficiency with which outside air is introduced into the vehicle interior.

In addition, it does not require installation space like a dedicated exhaust blower, so it is easy to install in a vehicle.

Furthermore, since the air inside the vehicle is forcibly exhausted using the air blower of the outdoor heat exchanger of the air conditioner, costs can be kept low compared to installing a conventional blower exclusively for exhaust. can.

[Example] Next, an example in which the present invention is applied to a package type cooling device mounted on the roof of a vehicle will be described with reference to the drawings.

FIG. 2 shows a refrigerant circuit diagram of a refrigerating cycle applied to a package type cooling device, and FIG. 3 shows a state diagram of the package type cooling device installed in a bus vehicle.

A refrigeration cycle 100 applied to a package type cooling device includes a refrigerant compressor 110 connected to a traveling engine or an auxiliary cooling engine of a bus vehicle 200. In this refrigerant compression 11110, the rotational output of the engine is intermittently transmitted via the electromagnetic clutch 111 to compress the refrigerant.

The high temperature, high pressure gaseous refrigerant compressed by the refrigerant compressor 110 flows into the refrigerant condenser 121, 122, 123, 124, which is the outdoor heat exchanger of the present invention, which is divided into four parts.
The air is condensed and liquefied by exchanging heat with air sucked through an outside air communication port 310 that communicates with the outside of the vehicle and an opening 320 that communicates with the interior of the vehicle.

The refrigerant condensed and liquefied in the four refrigerant condensers 121, 122, 123, and 124 flows into the receiver 130.

The refrigerant that has flowed into the receiver 130 is separated into a gas phase refrigerant and a liquid phase refrigerant, and only the liquid phase refrigerant is discharged from the receiver 130.

The refrigerant discharged from the receiver 130 flows into the dry A7140, and moisture in the refrigerant is extracted.

The refrigerant discharged from the dryer 140 is transferred to the refrigerant condenser 121.
．． Each subcooler 12 provided integrally with 124
5.126, and the refrigerant is given a degree of subcooling in a subcooler 125.126.

The refrigerant discharged from the subcooler 125 on one side (on the right side with respect to the vehicle traveling direction) is adiabatically expanded by the refrigerant pressure reduction device 151 for the right side. The atomized refrigerant, which has been brought to a low temperature and low pressure by the right-side refrigerant decompression device 151, flows into the right-side refrigerant evaporator 161, exchanges heat with the air sucked through the inside air inlet 340 and the outside air inlet 360, and evaporates.

The refrigerant discharged from the other subcooler 126 (on the left side with respect to the vehicle traveling direction) is adiabatically expanded by the left side refrigerant pressure reduction device 152. The atomized refrigerant made low temperature and low pressure by the left refrigerant decompression device 152 flows into the left refrigerant evaporator 162, exchanges heat with the air sucked through the inside air inlet 340 and the outside air inlet 360, and evaporates.

The refrigerant discharged from the right refrigerant evaporator 161 and the left refrigerant evaporator 162 is sucked into the refrigerant compressor 110 and the above cycle is repeated to cool the interior of the vehicle. Note that each functional component of the refrigeration cycle 100 is sequentially connected by a refrigerant pipe 170.

Refrigerant condenser 121.122. of the refrigeration cycle 100.
123.124, supercooler 125.126, receiver 1
30, dryer 140, right side refrigerant pressure reduction device 151, left side refrigerant pressure reduction '3A position 152, right side refrigerant evaporator 161
As shown in FIG. 3, the left-side refrigerant evaporator 162 is disposed within a package-type case 300 and mounted on the roof of the bus vehicle 200.

Inside the case 300 are refrigerant condensers 121, 122, 123.
．． 124, and a cooling unit B, in which a right side refrigerant evaporator 161 and a left side refrigerant evaporator 162 are installed.

Refrigerant IJIi in condensing unit A! 3121
．． 122, 123, and 124, the longitudinal direction of which is parallel to the longitudinal direction of the vehicle, and which are provided at appropriate intervals.

In addition, as shown in FIG. 4, outside air communication ports 310 are formed on both left and right sides of the case 300 of the condensing unit A and on the upper surface between the cold condensers 122 and 123 to introduce outside air into the case 300. , refrigerant condenser 122.123
As shown in FIG.
0 and an exhaust hole 230 provided in the ceiling exterior material 220
An opening 320 according to the present invention is formed which communicates with the interior of the vehicle via the opening 320 . Note that an air filter 231 is attached to the exhaust hole 230 to prevent the refrigerant condensers 122 and 123 from being clogged with cotton dust and the like.

The opening 320 is designed to prevent the Pfi air space from entering during rainy weather, etc., and to not impair the airtightness of the Iv.
A ventilation damper 321 is provided to open and close the opening 320. This ventilation damper 321 is driven to open and close by a motor 410.

In addition, the refrigerant condenser 121 of the case 300 and the refrigerant condenser 1
22, and between refrigerant condenser 123 and refrigerant condenser 124
As shown in FIG. 4, three air outlets 330 are provided between them, and an axial flow type condenser blower 420 is provided inside each of the air outlets 330.

The right side refrigerant evaporator 161 and the left side refrigerant evaporator 162 in the cooling unit B are also provided with their longitudinal directions parallel to the longitudinal direction of the vehicle.

As shown in FIG. 5, on the bottom surface between the right side refrigerant evaporator 161 and the left side refrigerant evaporator 162 of the case 300, an inside air introduction hole 240 provided in the ceiling interior material 210 and the ceiling exterior material 220 is provided. Inside air inlet 34 that communicates with the vehicle interior
0 is formed. Note that an air filter 241 is attached to the inside air introduction hole 240, and the right refrigerant evaporator 161
This prevents the left side refrigerant evaporator 162 from being clogged with cotton dust, etc.

The front part of the case 300 is provided with an outside air inlet 360 that introduces outside air into the space 350 between the right side refrigerant evaporator 161 and the left side refrigerant evaporator 162. As shown in FIG. 6, a partition wall 361 is provided between the space 350 and the outside air introduction port 3600, and an outside air introduction hole 362 is provided in the partition wall 361 to communicate the space 350 and the outside air introduction port 360. ing. This outside air introduction hole 362 is provided with an outside air introduction damper 363 that opens and closes this outside air introduction hole 362. The outside air introduction damper 363 is connected to the motor (see FIG. 7) 4.
It is driven to open and close by 30.

Note that an air filter 364 is provided between the outside air introduction port 360 and the outside air introduction hole 362.

Inside the right case 300 of the right refrigerant evaporator 161,
The air taken in from the inside air inlet 340 or the outside air inlet 360 is blown into the left side cold air duct 510 which is provided to extend in the front and back direction on the right side of the ceiling of the bus vehicle 200.
It houses the sirocco type evaporator usage III machine 440 on the right side.

In addition, inside the case 300 on the left side of the left-side refrigerant evaporator 162, a left-side cold air blower is provided that extends in the front-rear direction on the left side of the ceiling of the bus vehicle 200, which draws air from the inside air inlet 340 or the outside air inlet 360. Four sirocco-type left-side evaporator blowers 450 are housed in the duct 520 to blow air.

FIG. 7 shows an example of a control device for controlling the above embodiment.

The control device 600 controls the electromagnetic coil 112 of the electromagnetic clutch 111 and the drive motor 41 of the exhaust damper 321 shown above.
0, the motor 421 of the condenser blower Ia 420, the drive motor 430 of the outside air introduction damper 363, the motor 441 of the right side evaporator blower 440, and the motor 451 of the left side evaporator blower 450 are connected to the blower switch 1 operated by the vehicle occupant.
01 Outside air introduction switch 6201 Cooler switch 630
The energization is controlled according to the power-on state.

When the blow switch 610 is turned on, the right evaporator feed I
! The relay coils 611 for energizing the air blower 440 and the left evaporator blower 450 are energized, and the outside air introduction control circuit 621, the ventilation control circuit 622, and the cooler control circuit 631 turn on the outside air introduction switch 620 and the cooler switch 630. Electricity can be applied through the

When the relay coil 611 is energized, the relay switch 612 that moves to the relay coil 611 is closed.
The motor 441 of the right evaporator blower @ 440 and the motor 451 of the left evaporator blower 450 are energized.

When the outside air introduction switch 620 is turned on while the blower switch 610 is turned on, the outside air introduction control circuit 621
operates, the motor 430 rotates, and the outside air introduction damper 36
3 is developed. As a result, outside air is introduced into the space 350 from the outside air introduction port 360. In addition, when the outside air introduction switch 620 is turned on, the ventilation side @ circuit 622 is activated, the motor 410 rotates, the ventilation damper 321 is opened, and the condenser air blower 1jll 420 is activated, which generates negative pressure for the refrigerant. The space between the condensers 122 and 123 communicates with the interior of the vehicle via the opening 320, and the relay coil 623 for energizing the condenser blower 420 is energized. Further, when the outside air introduction switch 620 is turned on, a lamp 624 is energized and lit to inform the vehicle occupant that the outside air introduction switch 620 is turned on.

When the relay coil 623 is energized, the relay coil 6
23 is closed, and the condenser feed 1! Motor 421 of l1li 420 is energized.

When the cooler switch 630 is turned on while the blower switch 610 is turned on, the cooler control circuit 631 is activated, and the relay coil 632 of the energized phase of the condenser machine 420 is energized. The cooler control circuit 631 also includes a temperature sensor 633 that detects the temperature inside the vehicle interior, and a control volume 634 that is operated by a vehicle occupant to set the temperature inside the vehicle interior. Depending on the set position of the control volume 634, the relay coil 635 for energizing the electromagnetic clutch 111 is energized.

When the relay coil 632 is energized, the relay coil 6
The relay switch 636 linked to 32 is closed, and the condenser feed J! The motor 421 of one machine 420 is energized.

Further, when the relay coil 635 is energized, the relay switch 637 linked to the relay coil 635 is closed.
Electromagnetic coil 112 of electromagnetic clutch 111 is energized.

Note that 640 shown in the figure is a battery that is a power source for the vehicle;
650 is a main fuse for a power supply connected to the battery 640, 660 is a fuse that breaks the circuit when an overcurrent flows, and 670 is a breaker that instantly breaks the circuit when an abnormal current flows.

Next, the operation of the above embodiment will be explained.

b) When only the blower switch 610 is turned on, the relay coil 611 is energized, the relay switch 612 is closed, and the motors 441 and 451 rotate. At this time, since the outside air introduction damper 363 closes the outside air introduction hole 362 of the partition wall 361, the right side evaporator blower 440 and the left side evaporator air blower @ 450 suck only inside air from the inside air introduction port 340, and The inside air is discharged into the cold air duct 510 and the left side cold air duct 520, and is blown into the vehicle interior from each part of the right side cold air duct 510 and the left side cold air duct 520, thereby performing circulation.

O) When the cooler switch 630 is turned on while the blower switch 610 is turned on, the relay coil 632 is energized and the cooler control circuit 631 is activated.

When relay coil 632 is energized, relay switch 636 is closed and motor 421 rotates. As a result, the condenser blower 420 sucks outside air from the outside air communication port 310, and the refrigerant condenser 121.122.123.1
24, the air is forcibly exchanged with the supercoolers 125 and 126 and discharged from the air outlet 330.

On the other hand, the cooler control circuit 631 has a temperature sensor 633
The temperature inside the vehicle detected by the control volume 6
When the temperature is higher than the temperature set in 34, the relay coil 635
energize. When the relay coil 635 is energized, the relay switch 637 is closed and W! I-J coils 112 are energized. As a result, the rotational torque of the engine is transmitted to the refrigerant compressor 110 via the electromagnetic clutch 111, the refrigerant compressor 110 compresses the refrigerant, and the refrigeration cycle 100 operates.

When the refrigeration cycle 100 operates, the right refrigerant evaporator 1
The low humidity, low pressure refrigerant evaporates in the refrigerant evaporator 61 and the left side refrigerant evaporator 162, and the right side evaporator blower 440 and the left side evaporator blower 450 are activated by turning on the blower switch 610, so that air is sucked in from the inside air inlet 340. The inside air is cooled as it passes through the right side refrigerant evaporator 161 and the left side refrigerant evaporator 162, and the cooled air is blown into the vehicle interior from each part of the right side cold air duct 510 and the left side cold air duct 520. As a result, the interior of the vehicle is cooled.

c) When the outside air introduction switch 620 is turned on while the blower switch 610 is turned on, the relay coil 623 and the lamp 624 are energized, and the outside air introduction control circuit 621 and the exhaust control circuit 622 are activated.

Due to the operation of the outside air introduction control circuit 621, the motor 430
drives the outside air introduction damper 363 to introduce outside air into the space 350. At this time, by turning on the blower switch 610, the blower 440 for the right evaporator and the blower 8145 for the left evaporator are turned on.
0 is operating, the right side evaporator blower 440 and the left side evaporator blower 450 suck the inside air taken in from the inside air inlet 340 and the outside air taken in from the outside air inlet 360, and the right side evaporator duct 510 and the left side The cold air is blown into the vehicle interior through the cold air duct 520. As a result, outside air is introduced into the vehicle interior.

On the other hand, due to the operation of the exhaust control circuit 622, the motor 41
0 drives the ventilation damper 321 to open the opening 320, and at the same time, the relay coil 623 is energized, the relay switch 625 is opened, and the motor 421 is rotated. When the motor 421 rotates, the condenser jam 420 sucks outside air through the outside air communication port 310, sucks air inside the vehicle through the opening 320, and releases it through the air outlet 330.

As described above, by operating the condenser blower 420, the inside air is forcibly discharged from the opening 320 to the outside of the vehicle interior, thereby suppressing an increase in the air pressure inside the vehicle interior, so that outside air can be efficiently sucked into the vehicle interior.

2) When the outside air introduction switch 620 and the cooler switch 630 are turned on while the blower switch 610 is turned on, the above-mentioned outside air introduction into the passenger compartment and cooling operation are combined, and the inside air is drawn from the opening 320. The outside air is forcibly discharged outside the military, and the outside air is efficiently sucked into the vehicle interior, and the interior of the vehicle is cooled. Note that at this time, the refrigerant condensers 122 and 123 exchange heat with the cooled vehicle interior air, so that the degree of supercooling increases and the cooling capacity can be improved.

Note that if the vehicle is left in the scorching sun and immediately thereafter a cooling operation is performed by introducing outside air, hot air in the vehicle interior is forcibly discharged from the opening 320, so that the start-up of the air conditioner can be improved.

(Modified example) In the above embodiment, an exhaust damper was provided at the opening to prevent water from entering the passenger compartment during rainy weather, but if there is no risk of water entering through the opening, it may be removed. good.

Although the present invention is applied to a package type cooling device, it may also be applied to a split type cooling device in which a condensing unit and a cooling unit are separated.

Although an example has been shown in which the condensing unit is provided on the roof of the vehicle, it may be provided in other locations such as the rear of the vehicle, the front of the vehicle, the lower floor of the vehicle, or the side wall of the vehicle.

Although an example has been shown in which a hole is provided in the vehicle box body and the opening and the opening communicate directly with each other, the interior of the vehicle and the opening may communicate with each other through ducts.

Although an example is shown in which a refrigerant condenser is applied to an outdoor heat exchanger, the present invention may also be applied to an outdoor heat exchanger of a refrigeration cycle for heating and cooling.

Although an example is shown in which the blower is provided downstream of the outdoor heat exchanger, the blower may be provided upstream of the outdoor heat exchanger.

Although an example has been shown in which the device is mounted on a bus, it may also be mounted on other vehicles such as a train, or applied to an air conditioner on a ship.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of the condensing unit, Figure 2 is a refrigerant circuit diagram of the refrigeration cycle, Figure 3 is a schematic diagram of a package type cooling system installed on the roof of a bus, and Figure 4 is a top view of the case. , FIG. 5 is a sectional view taken along the line II shown in FIG. 4, FIG. 6 is a sectional view taken along the line ■-■ shown in FIG. 4,
FIG. 7 is an electrical circuit diagram of the control device. In the diagram 121.122.123.124...cold tR
Condenser 320...Opening 360...Outside air inlet 4
20... Condenser blower

Claims (1)

[Claims] 1) It has an outdoor heat exchanger equipped with a blower, and
In a vehicle air conditioner equipped with an outside air inlet that can introduce air outside the vehicle interior into the vehicle interior, on the upstream side of the blower,
An air conditioner for a vehicle, characterized in that an opening communicating with the interior of the vehicle is provided at a position on the upstream side of the vehicle exterior heat exchanger where negative pressure is generated. 2) According to claim 1, the vehicle outdoor heat exchanger is a refrigerant condenser of a refrigeration cycle housed in a case of a condensing unit mounted on the roof of the vehicle. air conditioner for vehicles. 3) The opening includes an exhaust damper that can be opened and closed, and the outside air introduction port includes an outside air introduction damper that can be opened and closed;
Claim 1 or 2, wherein the exhaust damper is provided so as to open when the outside air introduction damper is released to introduce air outside the vehicle interior into the vehicle interior. Vehicle air peace device.