JPH0641847Y2 - Air conditioner for vehicle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a vehicle air conditioner, and more particularly to a vehicle air conditioner capable of reducing a vehicle interior temperature gradient with a simple configuration.

[Prior Art] An air conditioner (automatic air conditioner) installed in a vehicle includes a compressor and a condenser (condenser) installed in an engine room.
Etc., and a temperature control unit arranged in the vehicle compartment. This temperature control unit is composed of equipment such as an evaporator and a heater core.

An example of such an air conditioner is disclosed in Japanese Patent Laid-Open No. 61-2.
It is disclosed in Japanese Patent No. 11123. In the device disclosed in this publication, the wind direction switching means blows the cool air toward the upper half of the occupant and the hot air toward the lower half of the occupant to maintain a good environment in the passenger compartment.

Further, in the air conditioner, the switching mechanism is operated and controlled according to the temperature state of the air blown into the vehicle compartment, and various air outlets including the hot air outlet and the ventilation outlet are changed, or Some air outlets are changed depending on the temperature difference between the set temperature and the passenger compartment temperature.

[Problems to be Solved by the Invention] However, in the conventional air outlet switching mechanism, the hot air is set to be blown out only from the hot air outlet (heat outlet) during extremely cold weather. In extreme heat, cold air is set to be blown out only from the ventilation outlet (vent).

Therefore, in extremely cold weather, the air flowability is poor, and the warm air does not flow quickly throughout the passenger compartment. Especially, the temperature rise is slow in the rear seats, and the passenger compartment temperature gradient becomes large.

In order to eliminate this inconvenience, other air outlets such as a rear heat outlet are separately provided, but there is a disadvantage that the configuration is complicated and the like.

[Purpose of Invention] Therefore, the purpose of this invention is to eliminate the above-mentioned inconveniences.
A temperature sensor for detecting the temperature inside the vehicle compartment is provided, and a first set temperature, a second set temperature higher than the first set temperature, and a third set temperature higher than the second set temperature are set as reference values of the vehicle interior temperature. Is provided, and this control unit causes air to be blown out from various air outlets together with the hot air outlet and the ventilation outlet when the vehicle compartment temperature is lower than the first set temperature,
When the passenger compartment temperature is equal to or higher than the first preset temperature and lower than the second preset temperature, air is blown out only from the hot air outlet, and the passenger compartment temperature is equal to or higher than the second preset temperature and lower than the third preset temperature. A switching mechanism is operated to blow out air from various air outlets together with the hot air outlet and the ventilation outlet, and to blow out the air only from the ventilation outlet when the vehicle compartment temperature is equal to or higher than the third preset temperature. By controlling the temperature, the temperature in the passenger compartment can be quickly and uniformly increased in extremely cold weather, the temperature gradient in the passenger compartment can be reduced, and other air outlets such as the rear heat outlet can be omitted separately to simplify the configuration. This is to realize a vehicle air conditioner.

[Means for Solving the Problems] In order to achieve this object, the present invention conserves the environment inside the vehicle compartment by switching at least various air outlets including a hot air outlet and a ventilation outlet by a switching mechanism. In the air conditioner for a vehicle, a temperature sensor for detecting the temperature inside the vehicle compartment is provided, and a first value is set as a reference value of the vehicle interior temperature.
A control unit that sets a set temperature, a second set temperature higher than the first set temperature, and a third set temperature higher than the second set temperature is provided, and the control unit sets the vehicle interior temperature to the first set temperature. When the temperature is lower than a set temperature, air is blown from the various air outlets together with the hot air outlet and the ventilation outlet, and the vehicle compartment temperature is equal to or higher than the first set temperature and the second set temperature. Air is blown out only from the hot air outlet when the temperature is less than, and when the vehicle compartment temperature is equal to or higher than the second preset temperature and lower than the third preset temperature, the hot air outlet and the ventilation blow. To control the operation of the switching mechanism so that air is blown out from the various air outlets together with the outlets and the air is blown out only from the ventilation outlets when the vehicle compartment temperature is equal to or higher than the third preset temperature. Characterize.

[Operation] According to the configuration of the present invention, in the control unit, when the vehicle interior temperature is lower than the first preset temperature, air is blown from the various air outlets together with the warm air outlet and the ventilation outlet. When the passenger compartment temperature is equal to or higher than the first preset temperature and lower than the second preset temperature, air is blown out only from the hot air outlet, and the passenger compartment temperature is equal to or higher than the second preset temperature and lower than the third preset temperature. In addition to the hot air outlet and the ventilation outlet, a switching mechanism is provided so that air is blown out from various air outlets and only when the temperature inside the vehicle is equal to or higher than the third set temperature, the air is blown out only from the ventilation outlet. Control the operation. As a result, the air blown out from the various air outlets agitates the air in the vehicle interior, and the temperature in the vehicle interior, including the rear seats, rises quickly and uniformly, especially during extremely cold weather, and the temperature gradient in the vehicle interior can be reduced. .

[Embodiment] An embodiment of the present invention will be described in detail and specifically with reference to the drawings.

1 and 2 show an embodiment of the present invention. In the figure, 2 is an air conditioner for a vehicle. The air conditioner 2 is controlled by a control unit 4 for various air outlets, an inside air temperature sensor 8 that is a temperature sensor that communicates with the control unit 4 to detect an inside air temperature that is a vehicle interior temperature, and the control unit 4. And a switching mechanism 8 for switching. That is, the control unit 4
Is a switching mechanism 8 according to a signal state from the inside air temperature sensor 6.
This switching mechanism 8 regulates the amount of hot air or ventilation air from various air outlets including at least the warm air outlet 10 and the ventilation outlet 12.

As shown in FIG. 2, the control unit 4 has a first set temperature (for example, 0 ° C.) as a reference value of the vehicle interior temperature, and a second set temperature (for example, 15 ° C.) higher than the first set temperature, This second
A third set temperature (for example, 20 ° C.) higher than the set temperature is set.

When the inside air temperature sensor 6 detects the inside air temperature, which is, for example, the vehicle interior temperature, is lower than the first set temperature (for example, 0 ° C.) as a reference value at the time of starting or during extremely cold, as shown in the attached table. In addition to the operation control (Bi-LEVEL) of the switching mechanism 8 so as to blow out warm air, which is air from various air outlets, together with the hot air outlet 10 and the ventilation air outlet 12, the inside air temperature sensor When 6 detects a temperature equal to or higher than the first set temperature (for example, 0 ° C.) and lower than the second set temperature (for example, 15 ° C.), the switching mechanism 8 is for blowing hot air as air only from the hot air outlet 10. The operation control (HEAT) is performed.

Further, as shown in the attached table, the control unit 4 controls the operation of the switching mechanism 8 according to the conventional target blowout temperature or the temperature difference between the set temperature and the passenger compartment temperature. In this case, the control unit 4 controls the operation of the switching mechanism 8 with the target outlet temperature as another reference value (for example, 40 ° C.), and the temperature difference between the set temperature and the passenger compartment temperature is the third reference value. The operation of the switching mechanism 8 is controlled based on the set temperature (for example, 20 ° C.).

Next, the operation of this embodiment will be described based on the flowchart of FIG.

In the control unit 4, first, a signal of a value obtained by calculating the target outlet temperature or the temperature difference between the set temperature and the passenger compartment temperature is input.

Then, the control unit 4 inputs the vehicle interior temperature which is a signal from the internal air temperature sensor 6, and the inside air temperature which is the vehicle interior temperature is the first
It is determined whether the temperature is lower than the set temperature, for example, 0 ° C.

When the temperature of the inside air, which is the temperature inside the vehicle, is extremely low and is lower than the first set temperature (for example, 0 ° C.), warm air is also supplied as air from various air outlets in addition to the hot air outlet 10 and the ventilation blower opening 12. The operation of the switching mechanism 8 is controlled so as to blow out (Bi
-LEVEL).

As a result, in extremely cold weather, air such as warm air is blown out from various air outlets, so that the air inside the vehicle compartment is agitated and the temperature of the entire vehicle interior including the rear seat rises quickly and uniformly. Therefore, the temperature gradient in the passenger compartment is reduced, and the passenger compartment can be effectively kept at a comfortable temperature.

On the other hand, when the inside air temperature, which is the vehicle interior temperature, is equal to or higher than the first set temperature and lower than the second set temperature, the operation control of the switching mechanism 8 is performed to blow out the warm air as the air only from the hot air outlet 10. (HEAT).

Then, the inside air temperature, which is the temperature inside the vehicle, is set to the second set temperature (15
C.) or higher, it is next determined whether or not the temperature is lower than the third set temperature.

When the inside air temperature, which is the passenger compartment temperature, is lower than the third preset temperature, the switching mechanism 8 is operated and controlled to open the various air outlets together with the hot air outlet 10 and the ventilation outlet 12 (Bi -L
EVEL). Thereby, the vehicle interior temperature can be promptly set to an appropriate value.

On the other hand, when the inside air temperature, which is the passenger compartment temperature, is equal to or higher than the third set temperature, the switching mechanism 8 is operated and controlled to open only the ventilation outlet 12 (VENT). As a result, it is possible to prevent the temperature inside the vehicle from becoming too high.

As a result, the vehicle interior temperature is directly detected, and various air outlets are controlled to operate corresponding to the respective reference values of the vehicle interior temperature, so that the vehicle interior temperature can be quickly and evenly applied to the rear seats even in extremely cold weather. It is possible to raise the temperature, reduce the temperature gradient in the passenger compartment, maintain a comfortable environment in the passenger compartment, and control the sensible temperature of the occupant to a comfortable temperature.

Further, in order to reduce the temperature gradient in the passenger compartment, another air outlet such as a rear heat outlet is not required separately, and the configuration can be simplified.

In this embodiment, the first value which is the above-mentioned reference value is used.
The set temperature, the second set temperature, and the third set temperature can be arbitrarily changed.

[Effect of the Invention] As is apparent from the above detailed description, according to the present invention,
A temperature sensor for detecting the temperature inside the vehicle compartment is provided, and a first set temperature, a second set temperature higher than the first set temperature, and a third set temperature higher than the second set temperature are set as reference values of the vehicle interior temperature. Is provided, and this control unit causes air to be blown out from various air outlets together with the hot air outlet and the ventilation outlet when the vehicle compartment temperature is lower than the first set temperature,
When the passenger compartment temperature is equal to or higher than the first preset temperature and lower than the second preset temperature, air is blown out only from the hot air outlet, and the passenger compartment temperature is equal to or higher than the second preset temperature and lower than the third preset temperature. A switching mechanism is operated to blow out air from various air outlets together with the hot air outlet and the ventilation outlet, and to blow out the air only from the ventilation outlet when the vehicle compartment temperature is equal to or higher than the third preset temperature. By controlling the temperature inside the vehicle directly and controlling the operation of various air outlets corresponding to each reference value of the temperature inside the vehicle, the temperature inside the vehicle can be quickly controlled even in extremely cold weather, even in the rear seats. In addition, it is possible to raise the temperature evenly, reduce the temperature gradient in the passenger compartment, maintain a comfortable environment in the passenger compartment, and control the sensible temperature of the occupant to a comfortable temperature.

Further, in order to reduce the temperature gradient in the passenger compartment, another air outlet such as a rear heat outlet is not necessary, and the configuration can be simplified.

[Brief description of drawings]

1 and 2 show an embodiment of the present invention, FIG. 1 is a system configuration diagram of a vehicle air conditioner, and FIG. 2 is a flow chart for explaining the operation of this embodiment. In the figure, 2 is an air conditioner, 4 is a control unit, 6 is an inside air temperature sensor, 8 is a switching mechanism, 10 is a hot air outlet, and 12
Is a vent for ventilation.

Claims (1)

[Scope of utility model registration request] 1. An air conditioner for a vehicle, in which various air outlets including at least a hot air outlet and a ventilation outlet are switched by a switching mechanism to maintain an environment inside the vehicle, and a temperature inside the vehicle is controlled. A temperature sensor that detects the temperature is provided, and the first set temperature, a second set temperature that is higher than the first set temperature, and a third set temperature that is higher than the second set temperature are set as reference values for the vehicle interior temperature. And a control unit that blows air from the various air outlets together with the hot air outlet and the ventilation outlet when the vehicle compartment temperature is lower than the first preset temperature, When the passenger compartment temperature is equal to or higher than the first preset temperature and lower than the second preset temperature, air is blown out only from the hot air outlet, and the passenger compartment temperature is equal to or higher than the second preset temperature and the third preset temperature. If the temperature is below the set temperature, To blow out air from the various air outlets together with the air outlet and the ventilation outlet, and to blow out air only from the ventilation outlet when the vehicle compartment temperature is equal to or higher than the third preset temperature. An air conditioner for a vehicle, which controls operation of a switching mechanism.