JPH01145221A - Air conditioner for vehicle - Google Patents

Abstract

PURPOSE:To suppress the electric power of a mounted battery which is consumed in a blower to the necessary min. limit by detecting the solar radiation quantity which a vehicle receives and selecting a solar battery or the mounted battery as the electric power source for the blower according to the magnitude of the detected solar radiation quantity. CONSTITUTION:The output of a solar battery 18 is supplied into the output distributor 30 of a control circuit 20. The first output Ia of the output distributor 30 is supplied into a solar radiation quantity detecting circuit 31, and the second output Ib is supplied into the common contact point 37 of the both switches 35 and 36 of a relay 34. Further, one edge of a condenser blower 13 is connected with the movable contact point 35a of one switch 35, and a mounted battery 16 is connected with the movable contact point 36a, etc., of the other switch 26. Further, the selecting contact point 35b of one switch 35 is connected with one edge of the mounted battery 16 through a switch 41 synchronized with an ignition switch. While, a driving signal for the blower 13 is outputted from a control signal generating circuit 46.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention includes a blower and is equipped on a vehicle,
The present invention relates to a vehicle air conditioner that operates to air condition the interior of a vehicle.

(Prior Art) Vehicles are equipped with air conditioners to adjust the cabin environment. For example, if the air conditioner has a cooling function, it vaporizes refrigerant to generate heat. A cooling unit (evaporator) that absorbs heat, a compressor that absorbs heat and compresses the vaporized refrigerant, and a condenser that liquefies the refrigerant by dissipating heat from the refrigerant compressed by the compressor. The system is equipped with a refrigerant circulation system that includes a cooling unit (condenser), etc., and the cooled air obtained by the cooling unit is pumped into the passenger compartment by a blower placed in connection with the refrigerant circulation system. Sent out. In such a refrigerant circulation system, the condenser is required to cause the refrigerant to dissipate heat relatively rapidly.
Therefore, as shown in Japanese Utility Model Application Publication No. 62-40015, for example, a condenser blower is provided to form an air flow passing through the condenser, and its action causes the air to flow between the refrigerant and the air in the condenser. Heat exchange is performed efficiently.

The capacitor blower is normally driven using a storage battery provided in a vehicle (hereinafter referred to as a vehicle battery) as a power source when a refrigerant circulation system in an air conditioner is activated. That is, the capacitor blower rotates when supplied with power from the vehicle-mounted battery, and consumes the power supplied from the vehicle-mounted battery in accordance with its rotation.

(Problems to be Solved by the Invention) In a vehicle equipped with an air conditioner equipped with a refrigerant circulation system as described above, the condenser blower is normally driven when the refrigerant circulation system is activated. This is often when the amount of solar radiation received by the vehicle is relatively large. and,
Given that the amount of solar radiation that vehicles receive is relatively large, capacitor blowers are not only driven by receiving power from the on-board battery, but also form part of the air conditioning system.
The blower that blows cold air into the vehicle interior is driven by the vehicle's on-board battery, operating at high rotation speeds and consuming a large amount of power. The ventilation blower installed in the vehicle is also assumed to be driven by the on-vehicle battery. Therefore, when the amount of solar radiation that a vehicle receives is relatively large,
The burden placed on the vehicle battery will become extremely large. For example, if the vehicle battery continues to bear an extremely large burden for a relatively long period of time, the burden will become excessive and the performance of the vehicle battery will deteriorate. There is a risk that the situation that will occur may occur.

In view of this, the present invention reduces the burden placed on the on-board battery when the vehicle is equipped with a blower and is operated under conditions where the amount of solar radiation received by the vehicle is relatively large. An object of the present invention is to provide an air conditioning system for a vehicle that can effectively reduce air pollution.

(Means for Solving the Problems) In order to achieve the above-mentioned object, an air conditioner for a vehicle according to the present invention includes a solar cell installed in the vehicle and outputting an output according to the amount of solar radiation, and a solar cell installed in the vehicle. The vehicle is equipped with a blower that can be operated when either a solar cell or an on-vehicle battery is used as a power source, and a solar radiation amount detection means that generates a detection output according to the amount of solar radiation received by the vehicle,
Based on the detection output obtained from the solar radiation detecting means, when the solar radiation received by the vehicle exceeds a predetermined value, the control means controls the power supply so that the blower is operated with the solar battery as the power source. provided and configured.

(Function) In the vehicle air conditioner according to the present invention configured as described above, when the blower is activated, the amount of solar radiation received by the vehicle is detected based on, for example, the output of the solar cell; If the detected amount of solar radiation is above a predetermined value, the control means performs power supply control such that the blower operates using the solar cell as a power source, and if the detected amount of solar radiation is less than the predetermined value. , the blower is assumed to operate using the vehicle battery as a power source.

By controlling the power supply to the blower in this way, the on-board battery is able to supply power to the blower in situations where the amount of solar radiation received by the vehicle is relatively large, which places a large burden on the on-board battery. It is assumed that this burden will be alleviated. Therefore, a situation in which the capacity of the vehicle-mounted battery decreases due to an excessive load is avoided.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 2 shows a vehicle equipped with an example of the vehicle air conditioner according to the present invention. In FIG. 2, in addition to an engine 3, an engine room 2 in a vehicle body 1 includes a cooling unit 10. Compressor 11. capacitor 1
2. A refrigerant circulation system is arranged, which includes a condenser blower 13 that forms an air flow passing through the condenser 12, and a pipe member 14 that connects the cooling unit 10, the compressor 11, and the condenser 12.
A blower 15 is connected to the cooling unit IO. Furthermore, an on-vehicle battery 16 is also arranged in the engine room 2.

On the other hand, a solar cell 18 is provided on the roof portion 17 of the vehicle body 1.
A control circuit section 20 is disposed within the vehicle compartment 19 of the vehicle body l.

These refrigerant circulation system, blowing blower 15. solar cell 18
, and the control circuit section 20, an example of a vehicle air conditioner according to the present invention is configured.

When the refrigerant circulation system described above is activated, the compressor 11 is driven by the engine 3, and the condenser blower 13 is driven by the control circuit section 2.
0, the vehicle is operated using the vehicle battery 16 or the solar cell 18 as a power source, and the blower 15 is operated by being supplied with power from the vehicle battery 16. Thereby, the cooled air obtained in the cooling unit 10 is sent out into the passenger compartment 19 by the blower 15.

Solar cell 18 disposed on roof portion 17 of vehicle body 1
The light-receiving surface portion is directed outward from the roof portion 17,
It is said to be covered with a transparent protective plate and generates an output according to the amount of solar radiation received by the light receiving surface.For example, in Fig. 3, the output voltage BV is plotted on the horizontal axis. With the output current Bl plotted on the vertical axis, the solar radiation is generated as shown with the amount of solar radiation Es as a parameter (in FIG. 3, m and n are each positive numbers). As is clear from the output characteristics shown in FIG. 3, the output voltage BV of the solar cell 18 takes a maximum value that is approximately constant regardless of the amount of solar radiation Es, and the output current Bl remains constant. Under the output voltage BV of , it increases and decreases approximately in proportion to the amount of solar radiation Es.

The control circuit section 20, as shown in FIG. It is assumed that it is connected to an on-vehicle battery 16 and a solar cell 18.

In the specific example of the control circuit section 20 shown in FIG.
The output of the solar cell 18 is supplied to the output distributor 30, and the first output Ia of the solar cell 18 obtained from the output distributor 30
is supplied to the solar radiation detection circuit 31. The solar radiation amount detection circuit 31 detects the amount of solar radiation received by the vehicle based on the first output 1a of the solar cell 18, and when the detected amount of solar radiation is equal to or higher than a predetermined value, the detection output signal Sa is sent to an AND circuit. 32
is supplied to one input end of the In addition, the second solar cell 18
The output 1b (Ib>>Ia) is supplied through a diode 33 to a contact 37 common to switches 35 and 36 in a relay 34. Movable contact 35a of switch 35
One end of the condenser blower 13 is connected to the
The other end of the capacitor blower 13 is grounded through a switch 39 in a relay 38, and the vehicle battery 16 is connected between the movable contact 36a of the switch 36 and the ground potential. The selection contact 35b of the switch 35 is the switch 4 which is synchronized with the ignition switch.
1 to one end of the vehicle battery 16, and the excitation coil 4 in the switch 42 and relay 38.
0 and is further grounded via the excitation coil 43 in the relay 34 and the collector-emitter path of the transistor 44. Also, switch 3
The selection contact 36b of No. 6 is a release contact.

A bias resistor 45 is connected to the base of the transistor 44, and an output terminal of the AND circuit 32 is also connected to the base.

Further, in this specific example of the control circuit section 20, a control signal generation circuit 46 is provided, and a command signal sb for instructing the operating state of the capacitor blower 13 is sent from the control signal generation circuit 46. The signal is supplied to the control end of the switch 42 and the other input end of the AND circuit 32.

Based on this configuration, when the refrigerant circulation system is put into operation, the switch 41 is first turned on.

At this time, the transistor 44 is in an off state, so that no current is supplied to the excitation coil 43 in the relay 34, and the movable contact 35a of the switch 35 in the relay 34 is connected to the selection contact 35b. The movable contact 36a of the switch 36 is kept connected to the contact 37. Therefore, the second output Ib of the solar cell 18 from the output distributor 30 is applied to one end of the on-vehicle battery 16 through the diode 33 and the switch 36, and the on-vehicle battery 16 is connected to the second output Ib of the solar cell 18.
The battery is placed in a state where it can be charged by the output Ib of the battery. Then, the voltage at one end of the vehicle battery 16 is
1 and a switch 35 in a relay 34 to one end of the capacitor blower 13, and is applied to one end of a switch 42 through a switch 41.

Under such circumstances, when the command signal sb is sent from the control signal generation circuit 46, the switch 42 is turned on, thereby turning on the excitation coil 40 in the relay 38.
The current from the vehicle battery 16 flows through the switches 41 and 42.
and the switch 39 of the relay 3 is turned on. Therefore, current from the on-board battery 16 flows to the capacitor blower 13 through the switch 41 and the switch 39 in the relay 38, and the capacitor blower 13
is in a state where power is supplied from the vehicle battery 16 and it is activated. At this time, the control signal generation circuit 46
The command signal sb from the AND circuit 32 is also supplied to the other input terminal of the AND circuit 32.

In such a state, when the amount of solar radiation received by the vehicle becomes relatively large, the amount of solar radiation detected by the solar radiation amount detection circuit 31 exceeds a predetermined value, and the detection output signal Sa from the solar radiation amount detection circuit 31 is output to one side of the AND circuit 32. is supplied to the input end of Therefore, the command signal sb and the detection output signal Sa are simultaneously supplied to the AND circuit 32, and the output signal Sc is obtained from the output terminal of the AND circuit 32 and supplied to the base of the transistor 44. As a result, transistor 44 is turned on, and current from vehicle battery 16 is transferred to switch 41. It flows through the excitation coil 43 in the relay 34 and the emitter-collector path of the transistor 44. As a result, the switch 35 in the relay 34 is switched so that its movable contact 35a is connected to the contact 37, and the switch 36 in the relay 34 is switched so that its movable contact 36a is connected to the selection contact 36b.
is switched to be connected to.

By switching the switches 35 and 36 in the relay 34 in this way, one end of the diode 33
It will be connected to one end of the capacitor blower 13 through the switch 35 in the relay 34, and the second output rb of the solar cell 18 obtained from the output divider 30 will be connected to the diode 33 and the switch 35 in the relay 34, and further, Through the switch 39 in the relay 38, the capacitor blower 13 is supplied and the capacitor blower 13
However, the solar cell 18 supplies electric power to the solar cell 18 so that the solar cell 18 is activated.

As described above, when the amount of solar radiation received by the vehicle is relatively large, the capacitor blower 13 is operated using the solar cell 18 as a power source, and as a result, the on-vehicle battery 16 will be reduced.

In the above example, power from the solar cells is supplied to the capacitor blower 13 when the amount of solar radiation received by the vehicle is relatively large.
A blower other than the capacitor blower 13 may be operated using the solar cell 18 as a power source.

(Effects of the Invention) As is clear from the above explanation, according to the vehicle air conditioner according to the present invention, when the refrigerant circulation system is operated under the condition where the amount of solar radiation received by the vehicle is relatively large, In this case, the blower installed in the vehicle is driven by electricity supplied from the solar cell, so when the amount of solar radiation that the vehicle receives is relatively large, the on-board battery can be used to power the blower. It is assumed that the burden will be effectively reduced by being exempted from the power supply to the Therefore, a situation in which the capacity of the vehicle-mounted battery decreases due to an excessive load is avoided.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of essential parts of an example of a vehicle air conditioner according to the present invention, FIG. 2 is a perspective view showing a vehicle equipped with an example of a vehicle air conditioner according to the present invention, and FIG. The figure is a diagram used to explain the characteristics of a solar cell used in an example of a vehicle air conditioner according to the present invention. In the figure, 10 is a cooling unit, 11 is a compressor, 12 is a condenser, 13 is a condenser blower, 15
16 is an on-board battery, 18 is a solar cell, 20 is a control circuit, 31 is a solar radiation detection circuit, 32 is an AND circuit, 34 and 38 are relays, 44 is a transistor, and 46 is a control signal generation circuit. be. Patent applicant Mazda Motor Corporation

Claims (1)

[Claims] A solar cell installed in a vehicle that outputs an output according to the amount of solar radiation, a solar cell installed in the vehicle, and a storage battery provided in the vehicle, which can operate even when the power source is either the solar cell or the storage battery installed in the vehicle. The amount of solar radiation received by the vehicle is greater than or equal to a predetermined value based on the detected output obtained from the solar radiation amount detecting means, and the solar radiation amount detecting means that generates a detection output corresponding to the amount of solar radiation received by the vehicle. and control means for controlling power supply so that the blower operates when the solar cell is used as a power source.