JPS60161210A - Car air-conditioner - Google Patents

Abstract

PURPOSE:To reduce noise of blower motor without sacrifice of temperature adjusting function by controlling a fan such that the variation rate when increasing air flow will be different from that when decreasing the air flow. CONSTITUTION:The differential temperature data TD1 between setting temperature data TR1 and cabin temperature data TS1 is operated then the differential temperature data TD2 between setting temperature data TR2 and cabin temperature data TS2 is operated. Thereafter, it is decided whether TD1-TD2>0, and if the answer is NO, it will mean that the difference DELTAT between TS and TR is increasing thereby a control signal is fed to drive circuit 10 to bring TS near to TR thus to increase the rotation of blower motor 3 and to increase the air flow linearly as DELTAT increases. If the answer is YES, it will mean that DELTAT is decreasing to drive the motor 3 to reduce the rotation thus to reduce the air flow in step as DELTAT decreases. Consequently, variation of air flow is not perceptible when increasing while noise reduction is clearly perceptible when decreasing.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention provides
Width dual-purpose space 111 that suppresses noise accompanying the rotation of ll II
1-Regarding 1 device.

(Background of the Invention) As a conventional vehicle air conditioner, for example,
There is one shown in Japanese Patent No. 77218.

Using this conventional device, for example, as shown in the air volume control characteristic diagram in Fig. 1, the absolute value ΔTo (°c) of the difference between the set temperature and the current vehicle interior temperature is, for example, 8 (°C) or more. ”-, the maximum air volume blown into the vehicle interior is P@m (+-11),
When the above Δ-[o (°C) is, for example, 2 (°C) or less, the lowest wind fi (10) Roaring J: It is considered to control the rotation speed of the sea urchin feeding machine (hereinafter referred to as the pro-a motor). . Then, when Δ-[0 (°C) is 2 to 8 (°C), the blowout air volume is linearly increased or decreased in proportion to the above-mentioned ΔK○.

[However, in the air volume control in the conventional device, although the air flow rate remains during hysteresis, the rate of change when it increases is the same as the rate of change when it decreases, so for example, When the blowout wind ffk decreases by a small amount from the maximum state, the rotation of the motor 1-1 is actually decreasing by a small amount, but the crew cannot feel the change, and when As a result, the sound generated by the rotation of the motor may be perceived as noise.

(Objects of the Invention) An object of the present invention is to provide a vehicle air conditioner that makes it possible to reduce the annoyance caused by the noise generated by a blower motor without impairing the humidity adjustment function.

(Structure of the Invention) The present invention is characterized in that when controlling the air volume of the blower, the rate of change when the air volume increases and the rate of change when it decreases are significantly different.

(Description of an Embodiment) FIG. 2 is a configuration diagram showing an embodiment of a vehicle air conditioner according to the present invention.

In the same figure, there is an intake door 2 in the air tact 1.
．． 1" Amotor 3. Evaporator 4.1 Amic Store 5. Heater core 6, differential door 7° Ben 1-door 8J'
3 and floor door 9 etc. are installed inside.

The position of the intake port 2 is selectively set to either the inside air inlet 2a side or the outside air inlet 2b side based on the operation of the seventh setter 12 on the Yuri. .

The amotor 3 is driven by 7M#I supplied from the drive circuit 10 and sends air into the vehicle interior.

Since the blower generator 4 constitutes a refrigerated recycle, it cools and unloads the air blown from the blower motor 3.

The -■- amixto 75 adjusts the proportion of the air that has passed through the evaporator 4 and has been cooled and dehumidified and is introduced into the heater side to be heated, and mixes cold air and warm air. The temperature is adjusted by blowing air into a single room.

This air mix door 5 is driven by an opening IfiL adjustment actuator (not shown) with Jζ, and a control signal is sent from the microcomputer 13 to achieve the desired temperature set by Yuna in the temperature setting device 11. By being supplied to the actuator, the opening degree of the second F ammic store 5 is controlled.

The heater core 6 introduces engine cooling water and heats the introduced air with the heat generated by the engine cooling water.

Differential door 7, pen 1~door 8. The flow doors 9 each open and close an air outlet into the vehicle interior.

The micro combi coater 13 supplies the various control outputs and inputs various air conditioning control data.
Based on these data, a calculation is performed to perform appropriate air conditioning control.

The microcomputer 13 includes a room temperature sensor 14 for detecting the temperature inside the vehicle. Outside air sub-sensor 15 for detecting outside air temperature. A cooling water groove sensor 16 for detecting the wetness of the engine cooling water. An evaporator outlet element 17 for detecting the temperature on the outlet side of the evaporator 4
Air conditioning control data detected by various sensors such as a solar radiation sensor 18 that outputs solar radiation every day and an opening sensor 19 that detects the opening of the air mix door 5 is input. Further, data from various types of operation from a humidity setting device 11 and a mode setting device 12 installed in the vehicle interior are inputted.

In the microcoater 13, the temperature inside the vehicle is adjusted based on the various human input data. This vehicle interior temperature adjustment control includes an inside/outside air switching process that switches the intake door 2, and a process that switches the intake door 2.
An air volume control process that controls the drive of the amotor 3 to adjust the air volume, and an air mix door opening control process that adjusts the temperature of the blown air to an appropriate temperature by adjusting the melon of the amic store 5, etc. The structure is as follows.

FIG. 3 is a flow chart 1 showing an example of the l1lil amount control process executed by the microcomputer 13.

When this air volume control process is started, first step 101
The above process is executed, and the set temperature data TR+ set by the occupant is read in the temperature setting device 11. continue,
The process of step 102 is executed, and the vehicle room temperature data T' S + detected by the room temperature sensor 14 is read.

Next, the temperature difference data r D + (= l
A calculation process of T R+ -'rS11> is performed (step 103).

Subsequently, the reading of the set temperature data R2 (step 10 = 1.) and the reading of the cabin temperature data TS2 (step 105) are executed again.

Then, through the process of the next step 106, the set temperature data T1 (two car room temperature data [S2 which temperature difference data T-D 2 = l T R2-1' S 21
The operation is executed.

Next, step d3 goes to the determination process of step 107, where a comparison is made between the first calculated temperature difference data 'T-D+ and the next performed temperature difference data 'T-1) ('?I<
1 straw, I-D I-Tl)21:=0 discrimination).

If the determination result in step 107 is NO, it can be determined that the difference Δ-" between the vehicle interior temperature 1fTS and the set temperature TR is increasing. Therefore, the process in step 108 is executed next, and the In order to bring the indoor temperature to "S@close to setting 11J Urou R" (), the drive circuit 10'\control 11ξ is output to increase or decrease the rotation speed (-air volume) of the blower motor 3.

The air volume control characteristics at this time are as shown in Figure 4, △°)
There is a type of blowout that linearly increases / /41 iM as - increases.

Further, if the determination result in step 107 is Y to S, the difference between the vehicle interior temperature T'S and the set temperature -11 (which difference △-
[This indicates that ゛ is decreasing, and in this case, ゛ is decreasing]
The rotational speed of the 21 amotor 3 is driven to decrease. As shown in FIG. 4, this airflow control characteristic is a control in which the blowout AM is gradually decreased by decreasing V as ΔT decreases.

Then, the process of step 110 is executed, and the first obtained temperature difference data [I)■ is replaced with the next obtained temperature difference data D2.
Return to 04. Below, step 104h day step 11
The process up to 0 is repeated, and appropriate air volume control is performed in the series.

As mentioned above, in the case of increasing t, 1, and the blowout air flow in this embodiment device, by increasing Jul lit linearly in proportion to the temperature Δt, the generation @ amount of the blower motor can be increased. This is done to ensure that the passengers do not feel any changes in the atmosphere by gradually increasing the amount of noise. Furthermore, when the volume of air blown is decreased, the reduction in the sound Ii is clearly felt by the ears of the passenger due to the sudden decrease to a constant tW1 and the width i0.

a3. In this example device, as shown in FIG. 4, a configuration is shown in which the Jll amount is controlled according to the difference Δ1' between the set temperature TR and the vehicle interior temperature TS. The invention is not limited to this, but as shown in FIG.
The configuration may be such that the amount of air 111 is controlled according to the opening degree of the air mix door 5 detected by 9, or the amount of air is controlled according to the temperature of the air blown into the vehicle interior, as shown in FIG. .

In addition, Figures 4 to 6 above show the characteristics of linearly increasing when the air volume increases and decreasing gradually when the private sector decreases, but this is just an example. As long as the characteristics at different times are different from each other, it may be a characteristic that increases or decreases the air volume in a curved manner, for example.

(Effects of the Invention) As described above in detail, the vehicle air conditioner according to the present invention can appropriately reduce the noise generated by the blower motor without impairing the dry temperature regulating function. Becomes Noh.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the air volume control characteristics of a conventional vehicle air conditioner, FIG. 2 is a block diagram of an embodiment of the vehicle air conditioner according to the present invention, and FIG. 3 is a diagram showing the air volume control characteristics of the vehicle air conditioner according to the present invention. Flowcharts 1 to 4 showing the contents are diagrams showing the III control characteristics of the same embodiment device, FIG. 5 is a diagram showing another example of the IN+loss control characteristics, and FIG. 6 is a diagram showing the roughness of the air volume control characteristics. FIG. 6 is a diagram showing another example. 3... Blower motor 5... Air mix door 10... Drive circuit 11... Temperature setting device 13... Microphone "1" Computer 14... Room temperature sensor V-1 one

Claims (2)

[Claims] (1) One control for adjusting the vehicle interior level and the blower f of a certain blower.
In a vehicle air conditioner equipped with an air blowing amount control means for automatically controlling a lil ship; A vehicle air conditioner characterized by: (2) The air blowing amount control means is characterized in that the rate of change when the air blowing amount is decreased by 1!1 jft is 6 more than the rate of change when the air blowing amount is increased. vehicle air conditioning system.