JPH04138911A - Air-conditioner for vehicle - Google Patents

Abstract

PURPOSE:To obtain a control result which is in better accordance with the human feeling by achieving air-conditioning control by taking the human feeling temperature calculated from the inside air temperature and the quantity of solar radiation as the control targets, and at the same time, changing the weighting of the inside air temperature and the quantity of solar radiation according to the season. CONSTITUTION:A controller 5 calculates the difference between the outside air temperature measured by an outside air temperature sensor 2 and the preset temperature obtained by a preset temperature sensor 4, then determines a controlled quantity of the feedforward control by multiplying this difference by a control coefficient. The inside air temperature is determined by multiplying the difference between the controlled quantity of the feedforward control and the feedback quantity of the feedback control by the first control gain, then the human feeling temperature is determined by adding the result of the multiplication of this inside air temperature by the second weight factor and the results of the multiplication of the quantity of solar radiation measured by a solar radiation sensor 3 by the first weight factor. Then, the feedback quantity of the feedback control is determined by multiplying the human feeling temperature by the second control gain. A temperature control actuator 7 is actuated according to the human feeling temperature to achieve the air-conditioning in the car room.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an air conditioner for a vehicle, and more particularly to an air conditioner for a vehicle for performing air conditioning control that corrects seasonal effects.

[Conventional technology]

BACKGROUND ART Conventionally, air conditioning (temperature control) control in a vehicle is generally performed with the sole aim of stabilizing the temperature inside the vehicle.

FIG. 5 is a block diagram showing a control method in a conventional vehicle air conditioner.

In other words, the conventional air conditioning control system, as shown in Fig. 5,
By calculating the error between the air temperature outside the vehicle (outside air temperature) To and the set temperature (set temperature) T, and multiplying this by the control coefficient K, the target temperature TF for feedforward control is determined.
is determined, and the value obtained by adding the amount of solar radiation (solar radiation amount) L and the feedback amount G2T of feedback control is multiplied by the first control gain G1 to obtain the temperature inside the vehicle interior (inside air temperature )
Define T. On the other hand, the obtained internal air temperature T is multiplied by the second control gain G2 to obtain the feedback amount C, 2T of the feedback control.

As described above, in the conventional control system for vehicle air conditioners, feedforward control is performed using the set temperature and outside air temperature, and then correction is performed using feedback control based on the inside air temperature.

At this time, solar radiation correction is used as a secondary correction.

[Problem to be solved by the invention]

It is known that the human sense of temperature is greatly influenced by the season and the amount of clothing worn.

FIG. 6 shows the temperature sensation of a vehicle occupant, and shows the difference in glove temperature judged to be good by the occupant depending on the summer and winter seasons and whether the occupant is wearing clothes or not. Here, the globe temperature refers to an environmental temperature that is close to the human body sensation based on ambient temperature and radiation.

As can be seen from Figure 6, the temperature at which the human body feels comfortable varies greatly depending on the season, summer and winter, and whether the person is wearing clothing or not.

However, since conventional vehicle air conditioning systems perform air conditioning control based only on the inside air temperature, the interior temperature set thereby does not necessarily match the interior environment that passengers feel comfortable in.

As described above, the conventional vehicle air conditioner has a problem in that it cannot perform sufficient air conditioning control that meets ergonomic requirements in consideration of the season and the like.

[Purpose of the invention]

The present invention is an attempt to solve the problems of the prior art.In a vehicle air conditioner, the human body sensible temperature calculated from the inside air temperature and the amount of solar radiation is controlled, and the inside air temperature is adjusted depending on the season. An object of the present invention is to provide a vehicle air conditioner that can make control results more similar to human sensations by changing the weights of solar radiation and solar radiation.

[Means to solve the problem]

The present invention calculates the error between the outside air temperature (T0) measured by the outside air sensor (2) and the set temperature (Ts) determined by the set temperature sensor (4), and adds a control coefficient (K) to the error.
The control amount of the feedforward control is determined by multiplying the control amount of the feedforward control, and the error between the control amount of the feedforward control and the feedback amount of the feedback control is multiplied by the first control gain (g1) to determine the inside air temperature (Ts). The determined internal air temperature (Ti
') multiplied by the second weighting coefficient (b) and the result of multiplying the amount of solar radiation (L) measured by the solar radiation sensor (3) by the first weighting coefficient (a) are added together to create a human body sensation. A controller (5) is provided which calculates the temperature (T) and multiplies the calculated human body-sensible temperature (T) by a second control gain (g2) to calculate a feedback amount for feedback control. and,
The temperature control actuator (7) is operated according to the output of the controller (5), that is, the determined human body temperature (T) to control the air conditioning inside the vehicle. This aims to achieve the above-mentioned objective.

[Effect]

In a vehicle air conditioner, the error between the outside air temperature and the set temperature is determined, and this is multiplied by a control coefficient to determine the control amount for feedforward control. Furthermore, the error between the control amount of the feedforward control and the feedback amount of the feedback control is multiplied by the first control gain to obtain the inside air temperature, and the result of multiplying the obtained inside air temperature by the second weighting coefficient and the solar radiation A human body-sensible temperature is obtained by adding the result of multiplying the amount by a first weighting coefficient, and a feedback amount of feedback control is obtained by multiplying the obtained human-body-sensible temperature by a second control gain. Since the air conditioning inside the vehicle is controlled according to the determined human body temperature, the human body temperature calculated from the inside air temperature and the amount of solar radiation can be controlled. By changing the weighting of the indoor air temperature and the amount of solar radiation, the control results can be made more similar to the human body's sensations.

〔Example〕

FIG. 1 is a block diagram showing one embodiment of the present invention, in which 1 is an inside air sensor that measures the temperature inside the vehicle, 2 is an outside air sensor that measures the temperature outside the vehicle, and 3 is a sensor that measures the amount of solar radiation. A solar radiation sensor, 4 a set temperature sensor that detects a temperature set value, 5
6 is a controller that controls the air conditioning, 6 is a fan motor that drives a ventilation system that ventilates the interior of the vehicle, and 7 is a temperature control actuator that controls the temperature inside the vehicle.

In this example, the outside temperature T. Find the error between and the set temperature T, multiply this by the control coefficient K to find the control amount of the feedforward control, and add the first control to the error between the control amount of the feedforward control and the feedback amount of the feedback control. Multiply the gain g1 to find the inside air temperature T, and add the result of multiplying the found inside air temperature T by the second weighting coefficient A and the result of multiplying the amount of solar radiation by the first weighting coefficient a. The human body sensible temperature T is determined by multiplying the found human body sensible temperature T by the second control gain g2 to obtain the feedback amount of the feedback control, and the air conditioning in the vehicle interior is adjusted according to the found human body sensible temperature T. By performing control, it is possible to perform air conditioning control using the human body temperature calculated from the indoor air temperature and the amount of solar radiation as the control target, and by changing the weight between the indoor air temperature and the amount of solar radiation depending on the season. This makes it possible to obtain control results that are more similar to human sensations.

FIG. 2 is a flowchart showing control of the human body sensible temperature T in the embodiment shown in FIG.

That is, the control of the human body sensible temperature T by the controller 5 is performed as follows.

(2) Outside air temperature T determined by the outside air sensor 2. and,
The target temperature T for feedforward control is determined by determining the error between the set temperature Ts from the set temperature sensor 4 and multiplying it by the control coefficient K.

(2) Find the error between the target temperature TF of the feedforward control and the feedback amount gzT of the feedback control, and multiply this by the first control gain g1 to find the inside air temperature T.

(2) Adding the result obtained by multiplying the obtained indoor air temperature T by a weighting coefficient a and the result obtained by multiplying the amount of solar radiation obtained by the solar radiation sensor 3 by a weighting coefficient a,
Determine the human body sensible temperature T.

That is, the human body temperature T is determined by the following relationship.

T = a L + b T!
・-(1) Figure 3 shows the weighting coefficient a for the amount of solar radiation.
This figure shows an example of , which varies depending on the vehicle type, and is larger than 1 in summer and smaller than 1 in winter.

FIG. 4 shows an example of a weighting coefficient for the inside air temperature, which is determined depending on the vehicle type, and is larger than 1 in summer and smaller than 1 in winter.

(2) Multiply the obtained human body sensible temperature T by the second control gain g2 to obtain the feedback amount g2T of the feedback control.

(2) The temperature control actuator 7 in the air conditioner is operated to adjust the vehicle interior temperature to a predetermined human body temperature T.

■At this time, the ventilation fan driven by the fan motor 6 ventilates the inside of the car in the shortest possible time.
To make the temperature inside a vehicle converge to a predetermined human body sensible temperature T.

In this way, in the present invention, air conditioning is controlled using the human body sensible temperature calculated from the indoor air temperature and the amount of solar radiation,
At this time, since the weight of the interior air temperature and the amount of solar radiation is changed depending on the season, the interior temperature of the vehicle as a result of the control can be made closer to the comfortable human body temperature.

[Effects of the Invention] As explained above, according to the present invention, in a vehicle air conditioner, air conditioning is controlled using the human body sensible temperature calculated from the inside air temperature and the amount of solar radiation as a control target, and By changing the weight of the weight depending on the season, it is possible to obtain control results that more closely match the human senses.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing an embodiment of the present invention, Fig. 2 is a flowchart showing control of the human body temperature T in the embodiment shown in Fig. 1, and Fig. 3 is a change in the weight depending on the season for the amount of solar radiation. Figure 4 is a diagram showing changes in seasonal weights for internal air temperature, Figure 5 is a block diagram showing a control method in a conventional vehicle air conditioner, and Figure 6 is a diagram showing the temperature of vehicle occupants. It is a diagram. 2... Outside air sensor, 3... Solar radiation sensor, 4... Set temperature sensor, 5... Controller, 7... Temperature control actuator , T...
...Human body temperature, To...Outside temperature, T,
......Set temperature, T8...Inside air temperature, L
・・・・・・Amount of solar radiation. Patent Applicant Suzuki Motor Co., Ltd. Agent Patent Attorney Isamu Takahashi Figure Figure Figure Figure Figure! Drinking Winter Care (Book 'i#') Figure 6

Claims (1)

[Claims] (1). Outside air temperature (T_
0) and the set temperature (T_
s), and multiplies this by the control coefficient (K) to obtain the control amount of the feedforward control, and the difference between the control amount of the feedforward control and the feedback amount of the feedback control is used as the first control. The gain (g_1) is multiplied to obtain the inside air temperature (T_i), and the result of multiplying this inside air temperature (T_i) by the second weighting coefficient (b) and the solar radiation amount (L) measured by the solar radiation sensor are multiplied by the first The human body sensation temperature (T) is obtained by adding the result of multiplying by the weighting coefficient (a), and the second control gain (g
_2) A controller is provided to obtain the feedback amount of the feedback control by multiplying by Characteristic vehicle air conditioner.