JPH11139155A - Air conditioner for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioner for a vehicle whereby pre-air conditioning obtaining a sufficient ventilation effect can be performed. SOLUTION: A control device 30 has a reception part receiving an operation signal from a remote controller 32 of radio system, when an operation signal from the remote controller 32 is generated, so as to perform pre-air conditioning control as follows through the reception part 30a. Since the pre-air conditioning control is performed by the remote controller 32, as compared with in the case of performing in accordance with an operation signal of a door key like a conventional device, a ventilation time can be large taken. Consequently, an effect of ventilation is sufficiently obtained, after a prescribed time, a compressor 5 is started, inside a car room can be cooled. As a result, inside the car room can be cooled in a short time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle air conditioner, and more particularly to a vehicle air conditioner capable of pre-air-conditioning control in which a passenger compartment is air-conditioned before a passenger gets into the vehicle.

[0002]

2. Description of the Related Art A known air conditioner for a vehicle is described in Japanese Patent Application Laid-Open No. 57-33011. In the above-described conventional apparatus, when the door key of the vehicle is operated, the ventilation in the vehicle compartment is performed for a predetermined time (1 minute), and then the compressor for air conditioning is driven to cool the vehicle compartment, thereby driving the compressor. It is described that the power consumption of the engine is reduced.

[0003]

However, in the above-mentioned conventional apparatus, the ventilation is performed when the door key is operated, which means that the occupant is in the vicinity of the vehicle and is in a state of getting into the vehicle immediately. Therefore, when the occupant gets in, the air is still being ventilated, and the occupant feels hot and wants to immediately drive the air conditioning compressor to obtain cool air.

[0004] For this reason, in the above-mentioned conventional device, even if ventilation is performed by operating a door key, the ventilation time is short.
There is a problem in that the effect of reducing the temperature in the vehicle interior due to ventilation is hardly obtained. An object of the present invention is to provide a vehicle air conditioner capable of performing pre-air conditioning that can obtain a sufficient ventilation effect.

[0005]

In order to achieve the above object, according to the first to third aspects of the present invention, the ventilation means (2) is activated by remote control to ventilate the vehicle interior for a predetermined time. At the same time, when a predetermined time has elapsed, the cooling means (3) is activated to cool the vehicle compartment.

[0006] Thus, since the ventilation in the vehicle compartment is performed by remote control, the ventilation time can be set longer than in the case of performing the ventilation in response to the operation signal of the door key as in the conventional device.
For this reason, a sufficient ventilation effect is obtained, and after a predetermined time has elapsed, the vehicle interior is cooled by the cooling means, so that the vehicle interior can be cooled in a short time. In the invention according to claim 3,
The compressor (5) of the refrigeration cycle (4) is selectively driven by an electric motor (9) mounted on the vehicle and an engine (100) mounted on the vehicle. When starting (3), the compressor (5) is driven by the electric motor (9).

As a result, when the vehicle interior is cooled by remote control as described above, the compressor is driven by the electric motor, so that no exhaust gas is emitted compared to when the compressor is driven by the engine. Good for the environment.

[0008]

(First Embodiment) A first embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an overall configuration diagram of the vehicle air conditioner of the present embodiment. The vehicle of the present embodiment is a hybrid vehicle in which a drive source is selectively switched between an engine 100 (E / G) or an electric motor (not shown) according to running conditions and the like. For example, in this example, when the vehicle speed is lower than a predetermined value, the vehicle travels only with the electric motor,
When the vehicle speed becomes higher than a predetermined value, the vehicle runs only with the engine 100. When the charge amount of a battery (not shown) mounted on the vehicle becomes smaller than a predetermined value, the engine 10
At 0, a generator (not shown) is driven to charge the battery with electric power.

[0009] The vehicle air conditioner has an air conditioner case 1 which forms an air passage into a vehicle cabin. An air / inside air switching box (not shown) provided with an inside / outside air switching door for switching a well-known inside / outside air mode is provided at the most upstream side of the air in the air conditioning case 1. In the air-conditioning case 1, an air-conditioning electric fan 2 for generating an airflow into the vehicle compartment is provided downstream of the inside / outside air switching box. An evaporator 3 (cooling means) for cooling the interior of the vehicle compartment of the refrigeration cycle 4 mounted on the vehicle is disposed downstream of the air-conditioning electric fan 2 in the air.

The refrigeration cycle 4 is well known,
A compressor 5 for compressing the refrigerant, a condenser 6 for condensing and liquefying the refrigerant from the compressor 5, and a receiver for separating the liquid-phase refrigerant and the gas-phase refrigerant from the gas-liquid two-phase refrigerant from the condenser 6 and storing the liquid-phase refrigerant It has a liquid device 7, a temperature-operated expansion valve 8 for reducing the pressure of the liquid-phase refrigerant from the liquid receiver 7, and the evaporator 3.

Here, the compressor 5 is driven by an engine in a normal vehicle. However, since the present example is a hybrid vehicle as described above, the vehicle may be driven by the electric motor with the engine 100 stopped. That is, in this example, the electric motor 9 dedicated to driving the compressor 5 is mounted on the vehicle, and the compressor 5 is selectively driven by the electric motor 9 and the engine 100. The selection of such a drive source is performed by a selection mechanism (for example, constituted by an electromagnetic clutch, a pulley, a belt, and the like, and controlled by the control device 30) indicated by 10 in FIG.

In the air-conditioning case 1, a heater core 11 that uses the cooling water of the engine 100 as a heat source is disposed downstream of the evaporator 3 in the air. Heater core 11
Is disposed in a part of the passage in the air conditioning case 1 as shown in FIG.
A bypass passage 13 that bypasses the heater core 11 out of the air that has passed through is formed. Then, the amount of air to be heated through the heater core 11 and the bypass passage 1
The amount of air passing through 3 is adjusted by the air mix door 12. That is, the temperature of the conditioned air is adjusted by adjusting the amount of warm air that has passed through the heater core 11 and the amount of cool air that has passed through the bypass passage 13 by the air mix door 12.

In the air-conditioning case 1, a face passage (not shown) for blowing conditioned air toward the upper body of the occupant, and a foot for blowing conditioned air toward the lower body of the occupant (not shown) are provided downstream of the heater core 11. And a defroster passage for blowing conditioned air toward the inner surface of the vehicle windshield. A plurality of blowout modes can be switched by disposing a blowout mode switching door (not shown) at each of the entrances of these passages.

Next, a control system of the vehicle air conditioner will be described. The control device 30 is a well-known computer unit having a CPU (not shown), a ROM (not shown), a RAM (not shown), and the like, which are arithmetic processing devices. Sensors 14 to 16 for taking in various types of air conditioning control information are connected to input terminals of the control device 30. 14 is an outside air sensor which is a means for detecting the temperature of the outside air of the vehicle compartment,
Reference numeral 15 denotes an inside air sensor which is a means for detecting the temperature of the air in the vehicle compartment. Reference numeral 16 denotes a solar radiation sensor which is a means for detecting the amount of solar radiation entering the vehicle interior. The control device 30 includes:
Temperature setting device 1 provided on air conditioning operation panel 18 in the passenger compartment
7 is input.

In the control device 30, the sensor 1
Based on the signals from 4 to 16 and the set temperature signal from the temperature setting device 18, the amount of air blown by the air-conditioning electric fan 2, the inside / outside air mode, the blowing mode, the target opening of the air mix door 12, and the like are calculated and determined. , Each air conditioner is controlled to achieve these target control values. The control device 30 includes the engine 1
An information signal from an engine control device 31 for controlling the ignition timing, fuel injection amount, etc. of 00 is input. That is, as described above, the driving source of the vehicle is switched according to the vehicle speed, so that the driving source of the compressor 5 needs to be switched accordingly. For this reason, the control device 30 receives a vehicle speed signal from the engine control device 31, determines whether the vehicle is driven by the electric motor or the engine 100, and switches the drive source by the selection mechanism 10 accordingly. It has become.

The control device 30 has a receiving unit 30a for receiving an operation signal from the wireless remote controller 32. When the operation signal from the remote controller 32 is issued,
The following pre-air-conditioning control is performed through the receiving unit 30a. Hereinafter, the pre-air conditioning control will be described with reference to FIG.
This will be described with reference to the flowchart of FIG. First, step S
At 10, the vehicle interior temperature T detected by the inside air sensor 15 is determined.
r (hereinafter, internal temperature Tr) is read. Next, step S2
At 0, it is determined whether or not the internal temperature Tr is higher than a predetermined temperature (60 ° C.). Here, in step S20, the internal temperature Tr is a signal related to the heat load in the vehicle compartment,
The inside air sensor 15 constitutes a signal generating means for generating this signal. Whether the internal air temperature Tr is higher than the predetermined temperature determines whether the heat load in the vehicle interior is higher than the predetermined heat load.

If it is determined in step S20 that the internal air temperature Tr is higher than the predetermined temperature, the process proceeds to step S30, in which the electric air-conditioning fan 2 is started to ventilate the passenger compartment. Here, in this ventilation, the inside / outside air mode is always the outside air mode in which only the outside air is introduced into the air-conditioning case 1, and the blowing mode is a face in which air flows easily occur in the entire passenger compartment, so that only the upper body of the passenger is blown. Mode. As a result, outside air is blown into the vehicle interior, and the air in the vehicle interior passes through an exhaust hole (not shown) opened in a rear package tray (not shown, in which an acoustic speaker or the like is arranged) at the rear of the vehicle interior. The air is exhausted outside the cabin.

At the time of this ventilation, the maximum voltage (the rated voltage of the vehicle battery is 12 V) is applied to the electric fan 2 for air conditioning. For this reason, the air-conditioning electric fan 2 performs ventilation at the maximum capacity. Subsequently, in step S40, it is determined whether the internal temperature Tr is lower than the predetermined temperature.
If the determination result is NO and the internal temperature Tr is still 60 ° C. or higher, step S30 is performed to continue ventilation.
Return to That is, ventilation of the vehicle interior is performed for a predetermined time until the heat load in the vehicle interior becomes smaller than the predetermined heat load.

On the other hand, if the determination result in step S40 is YE
In S, when the internal temperature Tr falls to 60 ° C. or lower, the process proceeds to step S50, in which the electric motor 9 is started, and the compressor 5 is started through the selection mechanism 10. That is, when the heat load in the vehicle compartment becomes smaller than the predetermined heat load, cooling of the air is started by the evaporator 3 to cool the vehicle compartment. It is preferable to operate the electric motor 9 at the maximum number of revolutions of the air conditioning design.

When the cooling is started, the controller 30 automatically controls the inside / outside air mode, the blowing mode, the opening of the air mix door 11, and the like so that the inside temperature Tr approaches the set temperature. Controlled. When the result of the determination in step S20 is NO and a signal to start pre-air conditioning is issued from the remote controller 32, the internal air temperature Tr
Is lower than 60 ° C., the process proceeds to steps S60 and S50, and the controller 30 performs automatic air conditioning control.

The effect of cooling the passenger compartment after performing ventilation in this manner is apparent from the data shown in FIG. FIG. 3 shows experimental data actually examined by the present inventor. The vehicle is parked for 2 hours in a state where the internal temperature Tr is 35 ° C., and ventilation is performed and ventilation is not performed (for air conditioning). The electric fan 2 is stopped), and changes in the internal temperature are taken as data. The experimental conditions were as follows, assuming summertime, an outside temperature of 35 ° C., a humidity of 60%, and a solar radiation of 1000 W /
It was mm ^2.

As can be seen from the above, after 2 hours, when the ventilation is provided, the temperature in the passenger compartment rises to 55.4 ° C. from 51.2 ° C., and the ventilation pear increases to 65.4 ° C.
4.2 ° C The temperature rise in the cabin could be reduced. Then, even if the compressor 5 is driven two hours later to cool the vehicle interior, the interior of the vehicle can be cooled faster after the ventilation as shown in FIG. As a result, the power of the compressor 5 can be reduced, and the cooling capacity can be significantly increased.

In this embodiment, since the pre-air-conditioning control is performed by the remote controller 32 as described above, the ventilation time can be made longer as compared with the conventional apparatus in which the pre-air-conditioning control is performed in response to an operation signal of a door key. . Therefore, a sufficient ventilation effect can be obtained, and the compressor 5 can be activated after a predetermined time to cool the vehicle interior. As a result, the vehicle interior can be cooled in a short time.

In this embodiment, the compressor 5 is started by the electric motor 9 instead of the engine 100 after ventilation in the above-mentioned hybrid vehicle. This allows, for example,
If the pre-air-conditioning control is performed without a long-time occupant, a large amount of exhaust gas is generated by the engine 100. However, in this example, the exhaust gas is not emitted and the environment is good. (Second Embodiment) This embodiment is different from the first embodiment in that
The contents of steps S10 and S20 are greatly different. In step S20 of the present example, as shown in FIG. 4, in addition to the inside air temperature Tr, a vehicle outside temperature Tam (hereinafter, outside air temperature) which is a temperature detected by the outside air sensor 14 is read.

In step S20, it is determined whether or not the difference obtained by subtracting the outside temperature Tam from the inside temperature Tr is equal to or more than 20 ° C., thereby determining whether or not the heat load in the vehicle compartment is larger than a predetermined heat load. If the determination result in step S20 is NO, the process proceeds to step S60 and step S50, and the automatic air conditioning control by the control device 30 is performed. On the other hand, if the decision result in the step S20 is YES, the process proceeds to a step S30, where only the electric blower fan 2 is started, and
Ventilate the cabin. Ventilation is performed and the above step S2 is performed.
If NO is determined as NO, the above-described automatic air conditioning control is performed.

(Third Embodiment) In the above embodiments, the ventilation is performed only when the internal temperature Tr is higher than 60 ° C. However, temperatures below 60 ° C. (eg 55
° C), the cabin is in an abnormally high temperature. Therefore, it is possible to lower the internal temperature Tr by continuing ventilation. In consideration of this point, in this example, the ventilation is continuously performed until the internal temperature Tr can be reduced by the ventilation. FIG. 5 is a flowchart showing the control contents of the pre-air-conditioning control of this example.
One minute is longer than in the embodiment (for example, 4 seconds).

When the process of the flowchart of FIG. 5 is started, first, in step S5, Tr0 is set as an initial value of the internal temperature.
(61 ° C.). Next, in step S10, the first
The internal temperature Tr is read in the same manner as in the embodiment, and step S2 is performed.
Proceed to 1. In step S21, it is determined whether the internal temperature Tr read in step S10 is lower than a predetermined temperature (60 ° C.).

If the decision result in the step S21 is NO, and the internal temperature Tr is higher than 60 ° C., the process proceeds to a step S60, in which the air-conditioning electric fan 2 is started, and the ventilation is performed as in the first and second embodiments. I do. And when ventilation starts,
In step S61, the initial value Tr0 is changed to the internal temperature Tr read in step S10. On the other hand, step S
If the decision result in the step 21 is YES and the internal temperature Tr is lower than 60 ° C., the process proceeds to a step S31, and the process proceeds to a step S60.
Provide the same ventilation. That is, even if the ventilation is performed in step S60 and the internal temperature Tr becomes lower than 60 ° C., the ventilation is further continued.

Then, the process proceeds to a step S41, wherein ΔTr
Is calculated. Here, ΔTr is changed from the initial value Tr0 or Tr0 changed in step S61 to step S1.
0 is the difference obtained by subtracting the read inside temperature Tr. Subsequently, the process proceeds to step S51, where it is determined whether or not the ΔTr is lower than a predetermined temperature (1 ° C.). That is, in step S51, it is determined whether or not the inside air temperature Tr has decreased due to the ventilation in steps S31 and S60. If the determination result in step S51 is NO, the process proceeds to step S61, and Tr0 is performed. Update and continue ventilation.

On the other hand, the result of determination in step S51 is YE
In S, if it is determined that the internal temperature Tr is not reduced by the ventilation, the process proceeds to step S50, and the compressor 5 is driven by the electric motor 9 as in the first and second embodiments. (Modification) In the above embodiment, the present invention is applied to a hybrid vehicle in which the vehicle is driven by at least one of the electric motor and the engine 100.
It may be applied to a normal vehicle where the vehicle runs only with
The present invention may be applied to a vehicle in which an engine dedicated to power generation is mounted and an electric motor for driving is driven by electric power generated by the engine.

In the first to third embodiments, the compressor 5 is driven by the electric motor 9 in the pre-air-conditioning control. However, when the charge amount of the battery is small, the compressor 5 is driven by the engine 100. Is also good
Alternatively, only the ventilation may be performed to suppress an increase in the temperature in the vehicle compartment. Further, in each embodiment, the ventilation means is configured by the electric air-conditioning fan 2 of the vehicle air conditioner. However, if a ventilation device is provided separately from the vehicle air conditioner, the ventilation may be performed using the ventilation device. .

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a vehicle air conditioner in each embodiment of the present invention.

FIG. 2 is a flowchart showing control contents in the first embodiment.

FIG. 3 is an explanatory diagram showing an effect of ventilation in each of the embodiments.

FIG. 4 is a flowchart showing control contents in the second embodiment.

FIG. 5 is a flowchart showing control contents in the third embodiment.

[Explanation of symbols]

2 ... Electric fan for air conditioning (ventilation means), 3 ... Evaporator (cooling means), 4 ... Refrigeration cycle, 30 ... Control device, 3
2. Remote control.

Claims (3)

[Claims] 1. A ventilation means (2) for ventilating a vehicle interior,
A vehicle air conditioner having a cooling means (3) for activating a refrigeration cycle (4) mounted on the vehicle to cool the interior of the vehicle, wherein the ventilation means (2) is started by remote control to activate the vehicle. An air conditioner for a vehicle, wherein ventilation of a room is performed only for a predetermined time, and when the predetermined time has elapsed, the cooling means (3) is activated to cool the vehicle interior. 2. A signal (T) related to a heat load in the vehicle interior.
r) for generating the signal (Tr) by performing ventilation in the vehicle interior for the predetermined time until the signal (Tr) becomes smaller than a predetermined heat load.
2. The vehicle air conditioner according to claim 1, wherein when the temperature of the vehicle becomes smaller than the predetermined heat load, the vehicle interior is cooled. 3. The compressor (5) of the refrigeration cycle (4) is selectively driven by an electric motor (9) mounted on the vehicle and an engine (100) mounted on the vehicle. The air conditioner for a vehicle according to claim 1 or 2, wherein when the cooling means (3) is started, the compressor (5) is driven by the electric motor (9).