JPH0729532B2 - Vehicle heating system - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a vehicle heating device, and more particularly to a vehicle heating device that uses both heat of engine cooling water and heat of an electric heater.

[Conventional technology]

2. Description of the Related Art Conventionally, in a vehicle equipped with an engine such as an automobile, a heat source of warm air used for heating the inside of the vehicle or for preventing fog of window glass such as a front window depends on cooling water for cooling the engine. That is, in such a vehicle,
Hot air is obtained by guiding the engine cooling water through a pipe to a heat core, which is a heat exchanger, and passing the air generated by a blower through the heat core.

However, in such a vehicle heating system, the temperature of the cooling water does not rise immediately after the engine is started, and therefore the room temperature cannot be heated until the temperature of the engine rises and the temperature of the cooling water rises, while the occupants of the vehicle endure the cold. I had to do it.

In order to solve such a problem, there is also a vehicle heating device that installs a combustion burner in the intake passage of the engine to improve the warm-up property of the engine and uses the heat to heat the vehicle. However, this device has a problem that the structure is complicated and expensive, and that the temperature control range is extremely narrow.

Therefore, as in Japanese Utility Model Laid-Open No. 58-164913, a heat core for passing cooling water is installed in the air passage of the heating device, an electric heater is installed, and the electric heater is energized while the cooling water temperature is low. A vehicle heating device has been proposed in which hot air is obtained and when the temperature of the cooling water rises, the electric heater is de-energized to obtain hot air using the heater core as a heat source.

However, the above-described vehicle heating device that uses an electric heater in combination with the cooling water type heating device merely energizes the electric heater to obtain hot air when the temperature of the cooling water after the engine has started has not risen. Therefore, the control of the electric heater when the vehicle uses other electric components that consume a large amount of electric power, for example, the vehicle electric components such as the heater for the headlamp and the rear defogger, is not considered, and it remains as it is. Then, there was a problem that it could not be put to practical use.

Further, in Japanese Utility Model Laid-Open No. 56-131207, when the outside air temperature is below a predetermined temperature, the electric heater is operated only when the engine water temperature is below a predetermined temperature and the power supply capacity of the battery is sufficient. An air conditioning control device for an automobile configured as described above has been proposed.

However, according to this device, even if the electrical equipment used at the same time as the electric heater is an electrical equipment that has to be continuously energized (for example, a brake lamp or a headlight), it does not hurt to energize intermittently. Even if it is an electric component without a power supply (for example, rear defogger), if the difference between the supplied power and the electric power consumption of the electric component is less than the electric power consumption of the electric heater, the power supply to the electric heater is uniformly stopped. Since it is configured as described above, the electric heater cannot be fully utilized, and there is a problem that the electric heater cannot be used in many cases especially when a plurality of electric components are used at the same time.

On the other hand, Japanese Patent Application Laid-Open No. 57-7711 discloses a brake lamp circuit provided with an exciting coil and a heater circuit provided with a relay operated by the exciting coil. By the operation of the relay,
There has been proposed a circuit for a vehicle heating device that is configured to stop energization of a heater circuit.

However, according to this circuit, since the former of the brake lamp circuit and the heater circuit is preferentially energized, even if the battery has a sufficient power supply capacity, the energization of the brake lamp circuit is performed. Sometimes the heater circuit is stopped, and there is a problem that the heater cannot be fully utilized.

[Object of the Invention] An object of the present invention is to provide a vehicle heating device in which an electric heater is used in combination with the conventional cooling water heating device, in which an electrical component used at the same time as the electrical heater must be continuously energized. If the electric power consumption of the vehicle does not exceed the power supply capacity of the battery, the electric heater is used for the former by judging whether it is an electric component that does not interfere with intermittent power supply. To provide a heating device for a vehicle in which the electric heater is electrified more preferentially and the latter is alternately electrified with an electric heater, so that the electric heater can be utilized to the maximum extent within the range of the power supply capacity of the battery. Is.

[Structure of Invention]

The vehicle heating device of the present invention that achieves the above object, in a heating device provided with an electric heater in the air-conditioning air passage of the vehicle, includes a detector for the engine cooling water temperature and a detector for the electrified state of the electrical components. Based on the output signals of these detectors, the electrical components that need to be continuously energized until the cooling water temperature reaches a predetermined temperature are given priority over the electric heater, and intermittently. The electric component that does not hinder the electric power supply is provided with an electric power control device that alternately supplies electric power in a range in which the electric power used by the vehicle does not exceed the power supply capacity of the battery.

〔Example〕

 Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a system diagram showing a configuration of a vehicle heating device of the present invention.

Generally, an air conditioner for a vehicle is provided with a switching valve 1 for switching between fresh air and circulating air and a blower 2 in an air introduction section, and an evaporator core 4 for cooling and an engine cooling in a blower passage 3 on the downstream side thereof. A heater core 5 for heating with water and switching valves 6 and 7 for mixing cold air and warm air are provided. The air whose temperature has been adjusted by the above-mentioned device is blown out by the switching valves 8 and 9 on the air outlet FACE provided in the vehicle instrument panel, the air outlet SIDE DEF. An outlet DEF that opens at the bottom of the front window and an outlet under the vehicle compartment.
It is divided into FOOT and blown out indoors.

In the vehicle air conditioner configured as described above, in the present invention, the electric heater 11 that generates heat when energized is provided in the blower passage 3 immediately upstream of the outlet DEF. And the outlet FOOT. This electric heater 11 has a temperature controller 12
The battery 14 is communicated via the power consumption control device 10 connected to the battery 14.

The temperature controller 12 controls the temperature of the air conditioner by sliding a knob 13.
In the present invention, the slide path 12a of the knob 13 of the temperature controller 12 is provided with three contacts A, B, C, and ON / OFF control of the electric heater 11 is performed by the positional relationship between the knob 13 and these contacts. I am trying. The contact A has the knob 13 set to the left end, that is, the adjusted temperature is at the lowest position, the contact C has the right end, that is, the adjusted temperature is set to the highest position, and the contact B has the adjusted temperature between the lowest and highest positions. Is set to.

In the present invention, the heater core 5 for heating the air conditioner is also used.
A temperature sensor 15 for detecting the temperature of the cooling water is provided at the cooling water inflow port 5a, and the output of the temperature sensor 15 is input to the used power control device 10.

Further, according to the present invention, the power consumption control device 10 includes power consumption detectors 16a, 17 such as vehicle electric components that consume a large amount of power, for example, a brake lamp 16, a headlight 17, a rear defogger 18.
a and 18a are connected to each other so that the power consumption of these electrical components can be detected.

In the vehicle heating device of the present invention configured as described above,
After the engine is started, the power usage control device 10 detects the position of the knob 13 of the temperature control 12 and the temperature of the cooling water or the usage status of the vehicle electrical component with a large amount of power usage,
The electric heater 11 is energized in a state where the energization of the electric heater 11 does not affect the operation of the electrical components, and the hot air is sent to the room immediately after the engine is started, and the temperature according to the position of the knob 13 of the temperature controller 12 is set. When the cooling water temperature is reached, the electric heater 11
Power is turned off.

FIG. 2 is a flowchart showing an example of a control procedure of the vehicle heating device of the present invention which operates as described above.

After the engine is started in step, it is determined in step whether the vehicle occupant puts the air conditioner into the heating mode. When the air conditioner is in the heating mode (YES), the process proceeds to step and it is determined whether or not the position of the knob 13 of the temperature controller 12 is between A and B. Then, in the above step, when it is determined that the heating mode is not set, and when it is determined that the position of the knob 13 is between A and B in this step, the process proceeds to step and the electric heater. Leave 11 in the OFF state.

If NO in step, the process proceeds to step, where it is determined whether the knob 13 is located between B and C.
When the knob 13 is located between B and C (YES),
Set the engine cooling water temperature to 60, which will be described later in step.
If not (NO), set the cooling water temperature to 80 ° C in step.

Then, after this step, the cooling water temperature detected by the temperature sensor 15 is determined whether or not it has reached the set temperature, and immediately after the cold start of the engine, in this step, the cooling water If it is determined that the temperature is less than or equal to the set temperature, the result is YES and the process immediately proceeds to the step,
If the cooling water temperature exceeds the preset temperature after a lapse of a predetermined time after starting the engine, or if the engine is stopped after the vehicle has been running for a sufficient period of time and then restarted without too much time, etc. Since the cooling water temperature is high even immediately after the engine is started, the determination in step is NO, and the electric heater 11 is maintained in the OFF state in the step or is turned off from the ON state. If the cooling water temperature is still below the set temperature even after a lapse of a predetermined time after the engine is started (YES), the process proceeds to step.

In this step, in this state, it is judged whether or not the specific electric components such as the brake lamp, the headlight and the rear defogger that consume a large amount of electric power are in the operating state, and the electric components are not operating (NO). In case of, move to step and turn on the electric heater 11. At this time, since the electric heater 11 is immediately heated, the air from the blower 2 passing through the electric heater 11 is warmed and becomes warm air, and the air outlet DEF.
It heats the cold room immediately after the engine is started by being blown out from the OT. At this time, when the set temperature is 80 ° C., the cooling water that has warmed up before turning off the electric power to the electric heater 11 starts to circulate in the heater core 5, so that the air from the blower 2 blows between the heater core 5 and the electric heater 11. Both are heated and the heating effect is further enhanced.

However, if YES is determined in the step (when the specific electrical component is in the operating state), the process proceeds to the step, the amount of power used at this time, the capacity of the battery 14 and the power generation by the rotation of the engine at this time. It is determined whether or not there is a margin in the amount of electric power used by comparing the amount of electric power supplied with the amount. If there is still a margin in the amount of power used, move to the step and set the electric heater within the margin.
Energize 11 and send hot air indoors.

If NO in step, that is, if there is no margin in the amount of electric power used, it moves to step and it is judged whether or not the electric component used is useless unless the power is continuously energized. That is, if the electrical equipment used is a brake lamp or headlight (NO), it is not possible to turn off the power to these electrical equipment, so move to the step and turn off the electric heater 11 or turn it off. If it is held, but if the electric component used is useful without continuously passing current like the rear defogger (YES), move to step. In this step, for example, the electric power controller 10 may be used to alternately supply a current to the heater of the rear defogger and the electric heater 11 to heat them simultaneously. In this case, the temperature rise rate of the electric heater 11 is slower than that in the case where a current is continuously applied to the electric heater 11, but warm hot air can be obtained immediately after the engine is started, as compared with the case of not energizing at all. Become.

After reaching the step, the step is returned to and the above procedure is repeated.

Thus, the vehicle heating device of the present invention, after the engine is started, within the time until the cooling water temperature rises to the set temperature, the electric heater 11 installed in the air passage of the air conditioner is energized and cooled. Since it is possible to supply hot air into the vehicle interior while considering the time until the water temperature rises and the power consumption with other electric components, it is extremely practical.

It should be noted that the selection of energization of the electric heater 11 and the use of other electric components can be freely made by simply changing the control program of the power control device 10 in consideration of the use priority. It is possible to decide.

〔The invention's effect〕

As described above, the vehicle heating device of the present invention is a heating device provided with an electric heater in the air-conditioning air passage of the vehicle, and includes a detector for the engine cooling water temperature and a detector for the energized state of the electrical components. Based on the output signals of these detectors, the electrical components that need to be continuously energized until the cooling water temperature reaches a predetermined temperature are given priority over the electric heater, and intermittently. Since the electrical equipment that does not hinder even the electrification is provided with an electric power control device that turns on the electric power alternately in a range in which the electric power used by the vehicle does not exceed the power supply capacity of the battery, The following effects can be achieved.

By providing the power usage control device, the electrical component used simultaneously with the electric heater is an electrical component that must be continuously energized, or an electrical component that does not interfere with intermittent energization. In the range where the electric power used by the vehicle does not exceed the power supply capacity of the battery, the former should be energized with priority over the electric heater, and the latter should be energized alternately with the electric heater. Therefore, the electric heater can be utilized to the maximum extent within the power supply capacity of the battery.

Until the temperature of the cooling water reaches the specified temperature, it is possible to use an electric heater in addition to the normal cooling water type heating device installed in the air conditioning air passage, so immediately after starting the engine. It is possible to quickly warm the passenger compartment.

When the cooling water temperature reaches a predetermined temperature, the electric heater is stopped and only the normal cooling water type heating device provided in the air conditioning air passage is operated, It is possible to prevent consumption of power more than necessary.

[Brief description of drawings]

FIG. 1 is a system diagram showing a configuration of an embodiment of a vehicle heating device of the present invention, and FIG. 2 is a flow chart diagram showing a control procedure of the vehicle heating device of FIG. 3 ... Blower passage, 5 ... Heating core for heating, 10 ... Electric power control device, 11 ... Electric heater, 12 ... Temperature controller, 13 ... Knob, 15 ... Temperature sensor, 16a, 17a, 18a ...
… Power consumption detector.

Claims (1)

[Claims] Claim: What is claimed is: 1. A heating system having an electric heater provided in an air-conditioning air passage of a vehicle, which is provided with a detector for engine cooling water temperature and a detector for detecting the energization state of electrical components, and outputs of these detectors. Based on the signal, there is no problem in intermittently energizing the electrical components that need to be energized continuously until the cooling water temperature reaches a predetermined temperature, prior to the electric heater. A heating device for a vehicle, characterized in that an electric power control device is provided in the electric component, alternating with the electric heater, so that the electric power is supplied within a range in which the electric power used by the vehicle does not exceed the power supply capacity of the battery.