JPH0739686Y2 - Automotive air conditioner - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention provides an automobile air that gives a passenger a comfortable feeling close to a natural wind by giving fluctuations to the air flow blown into the vehicle interior. Regarding the harmony device.

[Prior Art] When an airflow of a constant wind velocity hits an occupant, the occupant's sense is dulled, and the comfort tends to be weakened. Therefore, a change in air volume (change in fluctuation) such as natural wind is applied to the blown air flow,
Techniques for making passengers have a lasting comfortable feeling are proposed in Japanese Examined Patent Publication No. 63-13845 and Japanese Unexamined Patent Publication No. 62-83214.

[Problems to be Solved by the Invention] However, in the case of the above-mentioned conventional technique, there is no change in that the air flow is only fluctuated and the occupant is exposed to the wind of a constant temperature. Therefore, unless the change in air volume (amplitude of fluctuation) is made large, the effect of fluctuation is not sufficiently exerted. However, if the change in the air volume is increased, the noise is increased accordingly, which may cause another problem that the occupant's ears are disturbed.

The present invention has been made in view of the above circumstances, and an object thereof is to provide an air conditioner capable of providing a comfortable feeling close to natural wind even with a weak change in air volume (fluctuation with small amplitude).

[Means for Solving the Problem] In order to solve the above-mentioned problems, the vehicle air conditioner of the present invention has a fluctuation command means and an air flow blown into the vehicle interior when the fluctuation command signal is output from the means. Fluctuation control means that gives fluctuations (regular or irregular air volume changes), and fluctuations in the blowing temperature (regular or irregular) in synchronization with fluctuations of the blowing air flow when a fluctuation command signal is output. Fluctuation temperature control means for giving a temperature change).

[Operation] In the device of the present invention, when the fluctuation command signal is issued, the fluctuation blowing control means gives fluctuation to the blown air flow, and the fluctuation temperature control means changes the blown air temperature to the fluctuation of the blown air flow. Gives synchronized fluctuations. Therefore, the occupant receives the wind having the fluctuations of the two factors (air volume and temperature) mixed, and has a feeling closer to the natural wind than the fluctuations of only the simple air flow.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a main functional block diagram of a control unit of an air conditioner shown as an embodiment, and FIG. 2 is a schematic diagram showing an overall configuration of the device of the embodiment.

First, the outline of the overall configuration of the air conditioner will be described with reference to FIG. In FIG. 2, reference numeral 10 is a ventilation duct. At the upstream end of the ventilation duct 10, the inside air intake 12 and the outside air intake are switched by an intake door 11.
And a VENT outlet 15, a DEF outlet 16, and a FOOT outlet 17 which are switched by an outlet door 14.

In addition, a blower 18, an evaporator 19, an air mix door 20, and a heater 21 are sequentially provided in the middle of the ventilation duct 10 from the upstream side to the downstream side. Then, by controlling the opening degree of the air mix door 20, the mixing ratio of cold air and warm air is adjusted to adjust the temperature of the air blown into the vehicle. Reference numeral 22 is an intake door actuator, 23 is a compressor that constitutes a cooling system together with an evaporator, 24 is an air mix door actuator, 25 is a heater water valve, and 26 is a mode door actuator.

The actuators are controlled by the control unit 30. The control unit 30 is mainly composed of a microcomputer, and calculates a target outlet temperature based on at least input information from the inside air sensor 31, the outside air sensor 32, and the temperature setter 33. Then, the target position of the air mix door 20 and the target air flow rate of the blower 18 are calculated based on the calculated values, and the air mix door 20 and the blower 18 are controlled based on the calculated values. Further, the intake door 11, the evaporator 19 and the heater 21 are also controlled in the same manner.

In addition, the control unit 30 determines whether or not the air flow rate is a predetermined low air volume (minimum air volume or a breeze close to the minimum air volume) from the above-mentioned target blow temperature, and when it is determined that the air flow rate is less than the predetermined low air volume, the blower 18 Has a function of controlling the fluctuation of the position of the air mix door 20 in synchronism with the fluctuation of the brewer 18 while giving fluctuation to the rotation of the.

This point will be described with reference to the functional block diagram of FIG. The control unit 30 includes, as function realizing means, virtually target blowout temperature calculating means 51, target mixdoor position calculating means 52, target air flow rate calculating means 53, mixdoor control means 54, blower control means 55, LOW airflow rate determining means. Five
6. A fluctuation blowing signal generating means 57, a selecting means 58, a fluctuation position signal generating means 59, and a selecting means 60 are provided.

The target outlet temperature calculating means 51 calculates the target outlet temperature based on the input signals from the room temperature detecting means 61 (inside air sensor 31) and the temperature setting means 62 (temperature setter 33). The target mix door position calculation means 52 calculates the target misc door position based on the target outlet temperature, and outputs a normal position signal M _N.
Further, the target air flow rate calculation means 53 calculates the target air flow rate based on the target blowout temperature and outputs the normal air flow signal S _N.

On the other hand, the fluctuation blowing signal generating means 57 outputs a fluctuation blowing signal S _Y for pulsating the rotation speed of the blower 18 regularly or irregularly. In this case, the fluctuation blast signal generation means
The normal blow signal S _N corresponding to the target blow rate is input to 59, and the fluctuation blow signal generating means 57 fluctuates the blower rotation speed at random on the HI side and the LOW side based on the target blow rate. Outputs blast signal S _Y.

One of the normal blast signal S _N and the fluctuating blast signal S _Y is selected by the selection means 58, and the selected signal is supplied to the blower control means 55, and the blower control means 55 responds to the input signal by the blower drive voltage. Is output to control the rotation of the blower 18. That is, when the normal air blowing signal S _N is selected, the blower 18 constantly rotates under a constant voltage and sends out an air flow of a constant air volume. Further, when the fluctuation blowing signal S _Y is selected, the blower 18 pulsates and rotates under a fluctuating voltage, and sends out an air flow having a change in air volume such as natural wind.

Further, the fluctuation position signal generation means 59 outputs a fluctuation position signal M _Y for changing the air mix door position regularly or irregularly. In this case, the fluctuation position signal generating means 59 sends the normal position signal M _N indicating the target mix door position.
Has been input, the fluctuation position signal generating means 59, based on the target mix door position, or based on the mix door position separated by a predetermined amount from the target mix door position, the air mix door 20 on the full heat side and. Outputs a signal to swing to the full cool side. Furthermore, in this case,
The fluctuation position signal generating means 59 receives the fluctuation blowing signal S _Y from the fluctuation blowing signal generating means 57, and the fluctuation position signal generating means 59 determines the fluctuation cycle of the blowing based on the fluctuation blowing signal S _Y. The synchronized fluctuation position signal M _Y is output.

Normal position signal M _N from target mix door position calculation means 52
And the fluctuation position signal M _Y from the fluctuation position signal generating means 59.
One of them is selected by the selection means 60, and the selected signal is supplied to the mix door control means 54. Then, the mix door control means 54 outputs a drive signal to the mix door actuator 24 in accordance with the input signal to control the position of the air mix door 20. That is, the normal position signal
When M _N is selected, the air mix door 20 is moved almost fixedly to the target position. Also, the fluctuation position signal
When M _Y is selected, the air mix door 20 swings to the cool side and the heat side in synchronization with the fluctuation of the air blow based on the target position or a position separated by a predetermined amount from the target position. Exercised. And, thereby, fluctuation is given to the temperature of the blown air.

The selection processing of the selection means 58 and 60 is performed by the LOW air volume determination means 56.
Based on the results of. In this case, the LOW air flow rate determination means (fluctuation command means) 56 determines whether the blown air volume is below a predetermined low air volume (LOW air volume), depending on whether or not the target outlet temperature is within a predetermined range, and the predetermined low air volume. In the following cases, the LOW air volume determination signal (fluctuation command signal) is output. And LO
When the W air volume determination signal is output, the selection means 58 and 59
Selects the fluctuation blowing signal S _Y and the fluctuation position signal M _Y , and inputs the signals to the blower control means 55 and the mix door control means 54. When the LOW air volume determination signal is not output, the selecting means 58 and 59 are the normal air blowing signals.
S _{N and the} normal position signal M _N are selected and the same signal is input to the blower control means 55 and the mix door control means 54.

Therefore, when the air volume is equal to or lower than the predetermined low air volume, the fluctuation air is blown, and the blown air temperature fluctuates in synchronization with the fluctuation of the ventilation.

The above operation control is performed by the microcomputer in the control unit 30 as shown in the flowchart of FIG. 3, for example.

In this control, the presence / absence of a fluctuation command is monitored in step 101, and if the fluctuation command is not issued, the process proceeds to step 102 to perform normal control. That is, the blower 18 is rotated according to the target air flow rate, and the air mix door 20 is positioned at the target position. On the other hand, when the fluctuation command is issued, first fix the blowout mode to VENT mode (step
103), step 104 determines whether summer or winter based on the outside temperature. In the case of winter, the process proceeds to step 105, and fluctuation control is performed according to the pattern for winter only. In the case of summer, the process proceeds to step 106, and fluctuation control is performed according to the pattern for summer.

In this case, the fluctuation control in winter is performed with reference to the target mix door position, and when the air volume is large, the air mix door 20
To the full cool (FC) side, and when the air volume is small, shake the air mix door 20 to the full heat (FH) side. And
Set the fluctuation cycle of the air blow and the rocking cycle of the air mix door equally.

In addition, fluctuation control in the summer is performed with the mix door position, which is shifted a predetermined amount to the full cool side from the target mix door position, as the reference position. At that time, shake the Emi Ax Door 20 toward the Full Cool (FC) side. These fluctuation controls continue as long as the fluctuation command is issued,
When the fluctuation command is released, the control returns to normal control (step 10
7, 108).

According to the above-described control, since the fluctuation of the blown air temperature is changed in synchronization with the fluctuation of the blown air, the occupant receives the wind in which the fluctuations of the two elements (air volume and temperature) are mixed. For example, in winter, when the fluctuation is large, the wind is cooler than the target value, and when the fluctuation is small, the warmer air is warmer than the target value. Therefore, a large temperature difference is felt between when the air volume is large and when the air volume is small. Therefore, a relatively large sensible temperature change can be enjoyed even with a small change in air volume.

In summer, the fluctuation temperature control reference value itself is set to a cooler side (cooler side) than the target value, and the blown-air temperature rises and falls based on that. Therefore, on average, wind that is cooler than the target value is blown out. When the air volume is high, warm air is blown out, and when the air volume is low, cold air is blown out. Therefore, the body acclimated to the average cold wind is sometimes strongly hit by the warm wind, and the sensation of the occupant is suppressed or suppressed.

As described above, according to the control described above, the occupant receives the wind in which the fluctuations of the two elements (air volume and temperature) are mixed, and as a result, compared to the fluctuation of only the simple air flow,
It is possible to obtain a more natural feeling.

The fluctuation command in the above flow chart is automatically issued by the LOW air flow rate determining means 56 under certain conditions, but the fluctuation command may be issued when the control state is stable. Further, a dedicated fluctuation command switch may be provided so that the occupant can manually issue a fluctuation command arbitrarily.

Further, in the control example shown in FIG. 3, the fluctuation pattern is different in summer and winter, but the fluctuation may be changed in the same pattern regardless of the season. Also, the patterns of summer and winter may be exchanged. Further, a plurality of patterns may be prepared so that the occupant or the like can select them.
In any case, the fluctuation of the blown air temperature may be changed in synchronization with the fluctuation of the air volume.

[Advantages of the Invention] As described above, according to the vehicle air conditioner of the present invention, the fluctuation in the air volume is also synchronized with the fluctuation of the blown air temperature, so that there are two factors (air volume and air volume) for the occupant. A mixed wind of temperature fluctuations can be applied. Therefore, it is possible to give the occupant a sensation close to that of the natural wind without increasing the change in the air volume, and the fluctuation control does not disturb the occupant.

[Brief description of drawings]

FIG. 1 is a functional block diagram showing a main configuration of a control unit of an embodiment of the present invention, FIG. 2 is a schematic diagram showing an overall configuration of an air conditioner of the embodiment, and FIG. 3 is a view of the same embodiment. It is a flow chart which shows an example of control. 18 …… Blower, 20 …… Air mix door, 54 …… Mix door control means, 55 …… Blower control means, 56 …… LO
W air volume setting means (fluctuation commanding means), 57 ... fluctuation blast signal generating means, 58 ... selecting means, 59 ... fluctuation position signal generating means, 60 ... selecting means.

Claims (1)

[Scope of utility model registration request] 1. An air conditioner for a vehicle, which blows temperature-controlled air into a passenger compartment to automatically control the passenger compartment temperature, and blows into the passenger compartment when a fluctuation instruction means is output from the means. And a fluctuation temperature control means for giving fluctuation to the blowing temperature in synchronism with fluctuations of the blowing air flow when a fluctuation command signal is output. Automotive air conditioner.