JPH0572284B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an air conditioner for a vehicle, and in particular, an air conditioner for a vehicle that is not adversely affected by the amount of solar radiation and can perform air conditioning control that matches the feeling. It is related to the device.

[Conventional technology]

Conventionally, as shown in FIG. 3, a vehicle air conditioner includes an inside/outside air switching door 2 provided in a duct 1;
Blower 3, cooler 4, and air mix door 5
, a heater core 6 , a mode switching door 7 , 7 ,
It has a defrost outlet 8, a face outlet 9, and a foot outlet 10. The cooler 4 includes a compressor 11, a condenser 12, a receiver tank 13, and an expansion valve 14 to form a cooling cycle.

Here, the defrost outlet 8, the face outlet 9, and the foot outlet 10 are connected to the mode switching door 7,
The mode in which the conditioned air is blown out from the defrost outlet 8 is called the defrost mode, the mode in which the air is blown out from the face outlet 9 is called the face mode, and the mode in which the conditioned air is blown out from the defrost outlet 8 is called the face mode. The mode in which air is blown out from the outlet 10 is called a heater mode, and the mode in which air is blown out from both the defrost outlet 8 and the foot outlet 10 is called a bilevel mode.

The rotational force of an engine 15 is transmitted to the compressor 11 via a magnetic clutch 16. Reference numeral 17 is an A/D converter that detects the temperature inside the vehicle, which detects the temperature Tr of the inside air sensor 18, the opening degree θ of the air mix door 5 detected by the position detection potentiometer 19, the amount of solar radiation Ts detected by the solar radiation sensor 20, The outside air temperature Ta detected by the outside air sensor 21, the cooler temperature Tm of the cooler 4 detected by the temperature sensor 21, and the temperature setting device 23
The set temperature Td output by the converter converts the set temperature Td into a digital signal and outputs the digital signal to the control device 24.

The control device 24 is composed of, for example, a microcomputer, and includes an inside/outside air switching door control means 27 that controls the inside/outside air switching door 2 through a switching circuit 25 and an actuator 26, and a magnetic clutch 16 through a drive circuit 28. a compressor control means 29 for controlling the blower 3; a blower control means 31 for controlling the blower 3 via the drive circuit 30;
2. Air mix door control means 34 that controls the air mix door 5 via the actuator 33
, a mode switching door control means 37 that controls the mode switching doors 7, 7 via a switching circuit 35 and an actuator 36, and each data Tr, Ts, Ta, Tm,
Calculating means 3 which calculates the total signal T by calculating Td and outputs it to each control means 27, 31, 34, 37
It consists of 8. 39 is a manual switch. Note that the mode switching door control means 37 is
The mode determining means 40 controls the mode switching door control means 37 based on the mode switching signal TOF expressed by the following equation (1).

TOF=Tm+Kθ+β...(1) [K, β are constants] [Problem to be solved by the invention] By the way, in the vehicle air conditioner according to the prior art configured in this way, for example, the outside temperature
Assume that Ta is low and solar radiation Ts is high. Then, the total signal T is greatly influenced by the amount of solar radiation Ts, and as a result, the air mix door 5 is rotated to the full cooler mode side. When the air mix door 5 rotates to the full cooler mode side in this manner, the mode switching doors 7, 7 are controlled by the mode switching door control means 37 to enter the phase mode according to the above equation (1).
As a result, as mentioned above, even though the inside air temperature Tr is low, warm air is not blown out to the feet of the driver, which causes a problem that the driver's feeling is not matched. In addition, regarding air conditioners for automobiles,
Although a device described in Japanese Utility Model Publication No. 54-31704 has been proposed, the above-mentioned problems cannot be solved by this device.

Therefore, an object of the present invention is to blow out warm air from the foot outlet when the outside air temperature Ta is lower than the outside air set value even when the amount of solar radiation is low, and thereby perform air conditioning control in accordance with the feeling. An object of the present invention is to provide a vehicle air conditioner that can perform

[Means for solving problems]

The present invention comprises a solar radiation amount determining means 43 for determining whether the solar radiation amount Ts is higher than the solar radiation setting value, an outside air temperature determining means 42 for determining whether the outside air temperature is lower than the outside air temperature setting value, and the above-mentioned solar radiation amount. A control means 44 that controls the mode switching door control means 37 and the air mix door control means 34 based on the judgment results of the judgment means 43, the outside air temperature judgment means 42, and the mode judgment means.
It is equipped with the following.

[Effect]

The control means 44 controls the mode switching door control means 37 to change the blowout mode to the bilevel mode when the blowout mode is other than the heater mode, and when the amount of solar radiation is higher than the solar radiation setting value and the outside air temperature is lower than the outside air temperature setting value. Moreover, the air mix door control means 34 is controlled to prevent the air mix door from being controlled from a predetermined opening degree toward the cooler mode. As a result, warm air is blown out from the foot outlet.

〔Example〕

Embodiments of the present invention will be described below with reference to FIGS. 1 and 2. Note that the same components as those in the prior art are given the same reference numerals, and the description thereof will be omitted.

Further, reference numeral 41 denotes a set temperature determining means, and the set temperature determining means 41 is adapted to determine whether or not the set temperature Td is higher than a set value.

Reference numeral 42 denotes outside air temperature determining means, and the outside air temperature determining means 42 determines whether the outside air temperature Ta is higher than an outside air setting value.

Further, 43 is a solar radiation amount determining means, and the solar radiation amount determining means 43 is adapted to determine whether the solar radiation amount Ts is higher than a solar radiation setting value.

Further, 44 is a control means, and the control means 44 controls the air mix door control means 3 based on the determination results of the mode determination means 40, the outside air temperature determination means 42, the set temperature determination means 41, and the solar radiation temperature determination means 43.
4 and mode switching door control means 37.

Here, the control means 44 is configured such that the blowing mode determined by the mode determining means 40 is other than the heater mode, the outside air temperature Ta is lower than the outside air setting value, and the solar radiation amount Ts is lower than the solar radiation setting value. When the temperature is high, the mode switching door control means 37 is controlled to set the blowout mode to the bilevel mode, and the air mix door control means 34 is controlled to prevent the air mix door 5 from rotating from a predetermined opening degree toward the cooler mode. It is becoming regulated.

The vehicle air conditioner according to the present invention is constructed as described above, and its operation will now be explained based on FIG. 2.

First, in step S1, a signal is input.
This signal includes the temperature Tm on the downstream side of the cooler 4,
There are an opening degree θ of the air mix door 5, a constant β, etc.

Next, in step S2, a mode switching signal TOF is calculated from the above equation (1) based on the above signal.

Thereafter, in step S3, the mode determining means 40 determines whether or not the mode is in the heater mode based on the mode switching signal TOF. 7,7
to set the blowout mode to heater mode.

On the other hand, when it is determined in step S3 that the blowout mode is not the heater mode,
In step S5, the set temperature determining means 41 determines whether the set temperature Td is high or low. As a result, it is assumed that the set temperature Td is low. In this case, in step S6, the mode determining means 40 determines whether the mode is bi-level mode or phase mode based on the mode switching signal TOF. As a result, in step S7 when in bi-level mode,
The mode switching door control means 37 sets the blowout mode to the bilevel mode, and when in the phase mode, changes the blowout mode to the phase mode in step S8.

On the other hand, in step S5 above, the set temperature Td
Suppose that is high. In this case, in step S9,
The outside air temperature determining means 42 determines whether the outside air temperature Ta is high or low, and as a result, when the outside air temperature Ta is high,
The above step S6 is executed, and when the outside air temperature Ta is low, step S10 is executed.

Then, in step S10, the solar radiation amount determination means 43 determines whether the solar radiation amount Ts is high or low, and as a result,
When the solar radiation amount Ts is low, the above step S6 is executed. On the other hand, in step S10, the amount of solar radiation Ts
Suppose that is high. In this case, in the vehicle air conditioner according to the prior art, since the value of the solar radiation amount Ts is large, the blowing mode becomes the phase mode.

However, in the present invention, in step S11, the blowout mode becomes the sunshine bilevel mode. In this sunshine bilevel mode, the following control is executed.

First, the control means 44 controls the mode switching door control means 37 to set the blowing mode to the bi-level mode. Next, the control means 44 controls the air mix door control means 34 to restrict the air mix door 5 from rotating from a predetermined opening degree toward the cooler mode.

Thus, when the blowout mode is determined to be other than the heater mode based on the mode switching signal TOF, and when the outside air temperature Ta is low and the solar radiation amount Ts is high, warm air will be blown out from the foot air outlet 10.

Note that an air increasing means 45 in the figure may be provided to control the blower control means 31 to increase the air during the sunshine bilevel mode. As a result, the amount of solar radiation Ts
Even if the air pressure is high, drivers can enjoy the feeling of cold air due to the increased airflow.

〔effect〕

As explained above, according to the present invention, by including the solar radiation amount determination means, the outside air temperature determination means, and the control means, the blowing mode is determined to be other than the heater mode based on the mode switching signal, and the outside air temperature is When the amount of solar radiation is low and the amount of solar radiation is high, the control means controls the mode switching door control means to switch to the bilevel mode, and furthermore, the control means restricts the air mix door from rotating from a predetermined opening degree toward the cooler mode. As a result, warm air is blown out from the foot outlet, and therefore air conditioning control can be performed in accordance with the feeling.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a vehicle air conditioner according to the present invention, FIG. 2 is a flow diagram, and FIG. 3 is a block diagram of a vehicle air conditioner according to the prior art. 31... Air mix door control means, 37...
Mode switching door control means, 40... Mode determination means, 42... Outside temperature determination means, 43... Solar radiation amount determination means, 44... Control means.

Claims (1)

[Claims] 1 At least an air mix door control means that controls the air mix door based on the set temperature Td, the inside air temperature Tr, and the amount of solar radiation Ts, and whether the blowing mode of the conditioned air is heater mode, bilevel mode, phase mode, or defrost mode based on the mode switching signal. In the vehicle air conditioner, the vehicle air conditioner includes a mode determining means for determining whether the amount of solar radiation is
A solar radiation amount determining means for determining whether Ts is higher than the solar radiation setting value; an outside air temperature determining means for determining whether the outside air temperature is lower than the outside air setting value; It is determined that the solar radiation amount Ts is determined by the solar radiation amount determination means described above.
is determined to be higher than the solar radiation set value, and when the outside air temperature determination means determines that the outside air temperature Ta is lower than the outside air set value, the mode switching door control means is controlled to enter the bi-level mode, and the above-mentioned A vehicle air conditioner characterized by comprising: a control means for controlling the air mix door control means to prevent the air mix door from being controlled from a predetermined opening degree to a cooler mode direction, and to send out a constant amount of warm air. Device.