JPS62275818A - Air conditioner for vehicle - Google Patents

Abstract

PURPOSE:To secure a rising speed for optimum air quantity all the time, by increasing the air blasting quantity of an air blower to the extent of the air blasting quantity at the time of automatic control selectively with two types of the specified grades different from each other, in relation to detected inside temperature and detected solar radiation quantity at the time of cooling starting. CONSTITUTION:An air-conditioning device 3 inclusive of a blower air blasting quantity regulating device 3 is controlled according to control conditions including detected inside temperature by an inside temperature detecting device 1 and detected solar radiation quantity by a solar radiation quantity detecting device 2. In the above-mentioned air conditioner, when cooling is started, it is discriminated by a discriminating device 4, and either of first and second blast controlling devices 5 and 6 is selected by a selecting device 7 in relation to the detected inside temperature and the detected solar radiation quantity aforesaid. And, the air blasting quantity of an air blower is increased up to the air blasting quantity at the time of automatic control with a first specified grade, or it is increased with a second specified grade larger than the first one. With this constitution, a rising speed for the air quantity is selected according to ambient conditions, thus comfortable air-conditioning action is secured.

Description

[Detailed Description of the Invention] 3. Detailed Description of the Invention (Field of Industrial Application) The present invention relates to an air conditioner for a vehicle, and more specifically, an air conditioner for a vehicle that gradually increases the air volume when starting the air conditioner. Relating to a harmonizing device.

(Prior art) In a conventional air conditioner for a vehicle, the amount of air blown is increased at a predetermined rate in order to prevent hot air from being blown into the vehicle interior when the air conditioner is started and to prevent the evaporator from generating odor because it is not cooled. For example, JP-A-58-45
No. 118 and Japanese Utility Model Application Publication No. 57-181611.

(Problems to be Solved by the Invention) When using the conventional technology as described above, the air volume is gradually increased to the state under automatic control over a certain period of time, so that the air temperature inside the vehicle has already entered a stable region. When the vehicle is restarted or when the vehicle is stopped, the outside air temperature sensor appears to be significantly higher than the true outside temperature due to the influence of engine exhaust heat while the vehicle is stopped, even though the interior temperature has not risen. In some cases, the air volume is increased in a short period of time, and then stabilized at a low air volume after a while. However, this increase in air volume in a short period of time has the problem of making the passenger uncomfortable.

An object of the present invention is to provide a vehicle air conditioner that solves the above problems.

(Means for Solving the Problems) In order to solve the above problems, the present invention is constructed as follows.

The inside air temperature detection means 1 detects the inside temperature of the vehicle, and the solar radiation amount detection means 2 detects the amount of solar radiation received by the vehicle. In a vehicle air conditioner that controls an air conditioning adjustment means 3 including a blower air flow M adjustment means 31 according to control conditions including: a determination means 4 for determining that cooling is being started; The first step is to gradually increase the airflow amount to the amount in the automatic control state at a predetermined gradient of
a second ventilation control means 6 that sequentially increases the airflow rate of the blower at a second predetermined slope that is larger than the first predetermined slope up to the airflow rate in the automatic control state; and a discriminating means 4.
a selection means 7 for selecting either the first air blowing control means 5 or the second air blowing control means 6 in relation to the detected internal air temperature and the detected amount of solar radiation when it is determined that it is the time to start cooling;
Equipped with.

(Function) When the determining means 4 determines that it is the time to start cooling, the selecting means 7 selects a function in relation to the inside air temperature detected by the inside air temperature detecting means 1 and the amount of solar radiation detected by the solar radiation amount detecting means 2. First ventilation control means 5 or second ventilation control means 6
Either one of these is selected, and the amount of air blown is increased at a first predetermined slope or at a second predetermined slope up to the amount of air blown in the automatic control state. This selection is made in relation to the detected inside air temperature and the amount of solar radiation, and unlike the conventional case where the increase is made at a constant gradient regardless of the environmental temperature, when the inside air temperature is low and the amount of solar radiation is low, the first ventilation By selecting the control means 5, the amount of air blown can be increased with a gentle slope.

In addition, when the indoor air temperature is high or the amount of solar radiation is high and you want to quickly increase the airflow to the automatic control, you can select the second airflow control means 6 and increase the airflow at a steep gradient. can.

(Example of the invention) The present invention will be explained below using examples.

FIG. 2 is a block diagram of a vehicle air conditioner according to an embodiment of the present invention.

21 is an air conditioner main body, and 22 is a control device that controls the air conditioner main body 21.

The air conditioner main body 21 includes an intake damper 24 that controls whether the intake air is circulated as internal air, partially introduced into outside air, or completely introduced into outside air, from the upstream side to the downstream side of the duct 23.
, a blower 25 that blows the air sucked in through the intake damper 24 to the vehicle compartment 30, an evaporator 26 that exchanges heat with the blown air while the cooler 34 (described later) is in operation, and air that has passed through the evaporator 26 is diverted to a heater 28 (described later). A mix damper 27 that controls the amount of air to be used, a heater core 28 that acts as a heater through which cooling water of the vehicle internal combustion engine is circulated and heats the passing air, and a mode switching damper 29 that selects the air outlet to the vehicle interior 30. We are prepared.

Compressor 35, condenser 36, receiver tank 3
7. The expansion valve 38 constitutes a cooler 34 together with the evaporator 26. Furthermore, the rotation of the output shaft of the vehicle-mounted internal combustion engine is transmitted to the pulley 39. The rotation of the pulley 39 is transmitted to the compressor 35 via the magnetic clutch 40, and the compressor 35 is driven by this transmission.

The air outlet to the vehicle interior 30 includes a vent outlet 31 that blows air toward the head of the occupant, and a heat outlet 32 that blows air from the feet of the occupant, one or both of which are controlled by the mode switching damper 29. selected.

The intake damper 24 is connected to the motor actuator 33, the mix damper 27 is connected to the motor actuator 41, and the mode switching damper 29 is connected to the motor actuator 4.
2, respectively. In addition, in Figure 2, 4
Reference numerals 4 to 48 indicate drive circuits that respectively drive the motor actuator 33, the blower 25, the magnetic clutch 40, and the motor actuators 41 and 42, respectively.

On the other hand, an inside air temperature sensor 50 that detects the indoor air temperature of the vehicle, a solar radiation detection sensor (hereinafter simply referred to as a solar radiation sensor) 51 that detects the amount of solar radiation, and an evaporator outlet air temperature that detects the evaporator exit air temperature, that is, the temperature at point A. A temperature sensor 52, an outside temperature sensor 53 for detecting the outside temperature, a setting device 54 for setting the vehicle interior temperature, and a potentiometer 55 for detecting the mix damper opening are provided. The output of each sensor, the output of the setting device 54, and the output of the potentiometer 55 are sent to an A/D converter (hereinafter referred to as
The digital data converted by the ADC 57 is supplied to a microcomputer 58.

The microcomputer 58 is basically a CPU.

ROM that stores programs, RA that stores data
M, a human-powered boat, equipped with an output port and a timer. According to the program stored in ROM, A
The digital data output from the DC 57 is read via the manual boat, and the data processed and calculated by the CPU is output to the drive circuits 44 to 48 via the output ports.
The amount of air blown by the blower 25, the operating timing and operating rate of the compressor 35 controlled via the magnetic clutch 40,
The opening degree of the mix damper 27 and the opening degree of the intake damper 24 are controlled to bring the vehicle interior temperature to the set temperature. Note that the ratio between the amount of internal air circulation and the amount of outside air introduced is controlled by the opening degree of the intake damper 24.

The operation of one embodiment of the present invention will be explained with reference to the flowchart shown in FIG. 3 according to the program stored in the ROM.

When execution of the program is started, initial settings such as clearing the RAM are performed (step a).

Next, the outputs of the sensors 50 to 53, the setting device 54, and the potentiometer 55, which are converted into digital data via the input ports, are read and temporarily stored in a predetermined area of the RAM (step b), and then the vehicle interior temperature is determined. Control signal (hereinafter referred to as comprehensive data) T=T+K+T
E ” K 2 T A + K 3 T 5- to 4T
o+KS is calculated and temporarily stored (step C).

Here, TR is the vehicle interior air temperature, T is the evaporator outlet air temperature, and TA is the outside air temperature.

indicates the amount of solar radiation, which is detected by sensors 50 to 53. To is a set temperature set by the setting device 54, and K and - are constants.

Therefore, the comprehensive data T is related to the deviation between the set vehicle interior temperature and the detected vehicle interior air temperature, and also corresponds to a value corrected by the evaporator outlet air temperature T1, solar radiation iT, and outside air temperature TA, so that the vehicle interior temperature is It can also be said to be a value related to the heat load for controlling the cabin temperature to the set cabin temperature.

Then, 6θ+β is calculated on the data Ty=Te+ and temporarily stored (step d). Here, θ indicates the opening degree of the mix damper 27, and the relationship when all the air that has passed through the evaporator 26 passes through the heater core 28 is set as θ−100%. Furthermore, Kb and β
is a constant.

Therefore, data T corresponds to the temperature of the air blown into the vehicle interior 30 and is used as switching data for the mode switching damper 29.

Following step d, the amount of air blown is controlled. The amount of air blown is controlled according to the pattern shown in FIG. 5 during automatic control.

When the air flow rate control is started, the timer starts counting (step e), and it is checked whether the total data T is negative or positive (step r). When the data T is zero or positive, it is the cooling mode. When the cooling mode is determined in step f, it is checked whether the start-up completion flag is set (step g), and if the start-up completion flag is not set, it is checked whether the evaporator outlet air temperature T6 is equal to or higher than G degrees. checked (step h). When the evaporator outlet air temperature TE exceeds G degrees in step h, following step h, it is checked whether the time B that was started in step e has elapsed (step i). Step i if time B has not elapsed
Subsequently, the drive voltage BL applied to the motor of the blower 25
O is set to a low voltage, the air flow is made low (steps j, r), and step b is executed again. Therefore, in this case, the amount of air blown by the blower 25 is controlled to a low amount until time B elapses (see FIG. 4). At the same time, in step h, the evaporator outlet air temperature T. When the temperature exceeds G degrees, the evaporator 26 is not sufficiently cooled and generates an odor. Therefore, during time B, the air flow rate is suppressed to a low air volume to suppress the odor generation. Further, in step h, when the evaporator outlet air temperature Tt is below G degrees, no odor is generated, so step i is bypassed.

Following step i or h, it is checked whether the amount of solar radiation T is greater than or equal to C (step k).

When is less than C, it is checked whether the inside air temperature is below E degrees (step β). If the internal air temperature TR is below E degrees, continue with step l and blow air! The driving voltage BLO applied to the 25 motors is ΔL8 each, BLO=BAllT
is increased sequentially until it reaches O (steps ff1-n
), B L O = BA (When ITO is reached, the start-up completion flag is sent (step q), the blower 25 is set to the automatic state (step s), and the drive voltage BAUTO is applied to the drive motor of the blower 25. (step).

Subsequently, steps (step b) are executed again via steps such as operation control of the compressor 35 and opening control of the mix damper 27 (not shown). Here BAUTO is blower 25
This is the drive voltage applied to the motor during automatic control.

Note that in step n, the drive voltage BLO becomes the drive voltage B
When it is less than AUTO, step ``is executed following step n, and the drive voltage BLO is applied to the motor of the blower 25.

When the internal air temperature TR exceeds E degrees in step β, the drive voltage BLO applied to the motor of the blower 25 following step β is increased by ΔL/y, BLO=BA
is increased sequentially until UTO is reached (step l 9
%n), when BL○=BA[ITO, a startup completion flag is sent (step q). Note that in this case, X is set to a larger value than y.

Further, when the amount of solar radiation T, is equal to or greater than C in step k, step l is bypassed, and step p is executed following step k.

Therefore, in the present embodiment described above, when step i is executed, following the low air volume period of period B, as shown in FIG. It can be increased to . Further, this routine is not executed once BLO=BAUTO is reached, and is executed only at startup. Plus, solar radiation! When 'rs is less than C and the inside air temperature is below E degrees, the air flow rate increases slowly with a slope of ΔL/x as shown by the broken line in Figure 4, and when the amount of solar radiation T is above C or the inside air temperature When the angle exceeds E degrees, the air flow rate is rapidly increased at a gradient of ΔL/y, as shown by the solid line in FIG.

(Effects of the Invention) As explained above, according to the present invention, a vehicle is provided with an inside air temperature detection means and a solar radiation amount detection means, and is configured to reduce and sequentially increase the amount of air blown into the passenger compartment when starting air conditioning. In a commercial air conditioner, when the inside air temperature is not so high and a large rise in air volume is not desired, the air volume is increased gently, and when a large air volume is desired, such as when the amount of sunlight is large or the inside air temperature is high. This enables fine-grained control to quickly increase the air volume, and the speed at which the air volume rises is selected depending on the surrounding conditions, without causing discomfort to the occupants.

In addition, when restarting after the inside temperature has stabilized, when the inside temperature distribution is uneven and the inside temperature does not represent the inside temperature, the amount of solar radiation that is a factor in the rise in the room temperature is detected,
Since the speed at which the air volume rises is determined, it is possible to provide the occupants with an optimal feeling of cooling when starting up. Further, when the inside air temperature is low, the gradient of increase in the amount of air blown is small, and a sudden increase in the amount of air blown does not occur.

[Brief explanation of the drawing]

FIG. 1 is a functional block diagram showing the configuration of the present invention. FIG. 2 is a block diagram showing the configuration of an embodiment of the present invention. FIG. 3 is a flowchart for explaining the operation of one embodiment of the present invention. FIG. 4 and FIG. 5 are diagrams providing detailed explanation of the present invention. 1... Inner air temperature detection means, 2... Solar radiation amount detection means,
3... Air conditioning control means, 3. . . . Blower air volume adjustment means, 4. Discrimination means, 5 and 6. First and second air blow control means, 7. Selection means. Figure 1 Figure 4

Claims (2)

[Claims] (1) Comprising an inside air temperature detection means for detecting the inside temperature of the vehicle, and a solar radiation amount detection means for detecting the amount of solar radiation received by the vehicle,
In a vehicle air conditioner that controls an air conditioning adjustment means including at least a blower air volume adjustment means according to control conditions including a detected internal air temperature and a detected amount of solar radiation, a determination means for determining that cooling is being activated; The first is the amount of air flow.
a first air blowing control means for sequentially increasing the air blowing amount to the air blowing amount in the automatic control state at a predetermined gradient of , and increasing the air blowing amount of the blower to the air blowing amount in the automatic control state at a second predetermined slope that is greater than the first predetermined gradient; a second air blow control means that sequentially increases the air blow control means; and when it is determined by the determination means that it is time to start cooling, either the first air blow control means or the second air blow control means is controlled in relation to the detected internal air temperature and the detected amount of solar radiation. A vehicular air conditioner comprising a selection means for selecting one of the two. (2) The selection means selects the first air blowing control means when the detected internal air temperature is lower than a predetermined temperature and the detected solar radiation is smaller than a predetermined value, and if the detected internal air temperature is not lower than the predetermined temperature or the detected solar radiation is 2. The vehicle air conditioner according to claim 1, wherein the second air blowing control means is selected when the air blowing control means is not smaller than a predetermined value.