JPH04191122A - Control device for air conditioner - Google Patents

Abstract

PURPOSE:To enhance service efficiency of a filter member by computing the operating time of a blower based on the accumulated time value set in advance every speed of the cabin blower, and thereby letting the filter member be wrapped around when the operating time comes up to a set value in a control device for an air conditioner furnished with a roll filter for a vehicle. CONSTITUTION:A cabin blower 3 is controlled in speed by the operating control signal of a control circuit 5. Meanwhile, a take-up control circuit 6 outputs pulse duty and operating signals with a set pulse width for an automatic take-up filter device to the operating circuit 8 of a roll filter device 7 based on the operating signal of the cabin blower 3. The operating circuit 8 accumulates operating time, and permits a filter member to make one turn whenever an accumulated valve comes up to a set value, so that the new portion of the filter member is thereby positioned at an air passage.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an air conditioning control device that conditions the air inside a vehicle using an indoor blower mounted on the vehicle.

[Conventional technology]

FIG. 3 is a block connection diagram showing a conventional air conditioning control device. In FIG. 1, 1 is an air conditioner, 2 is an operating circuit provided in the air conditioner 1, 3 is an operating circuit provided in the air conditioner 1, An indoor blower operated by a driving circuit 2; 4 an air conditioning control section that operates and controls the air conditioning device 1 and the roll filter device 7; 5 a control circuit provided in the air conditioning control section 4; 7 an air conditioning device 1, the above-mentioned automatic winding type roll filter device that filters air returned to the vehicle interior using a filter medium; 8, an operating circuit provided in the roll filter device 7; 9;
is a filter media winder provided in the roll filter device 7 and operated by the operating circuit 8.

Further, FIG. 4 is a time chart showing signal states of each part of the block.

Next, the operation will be explained.

The air conditioning control unit 4 inputs an operation control signal from the control circuit 5 to the operation circuit 2, and based on this control signal, the operation circuit 2
controls the operation of the indoor blower 3, and also controls the operation circuit 8.
Also input the filter control signal to Therefore, this operating circuit 8 supplies a signal synchronized with the operation of the indoor blower 3 to the filter medium winder 9 of the roll filter device 7. In this case, the roll filter device 7 is used to filter the air returned from the air conditioner 1 to the inside of the vehicle, and as shown in FIG. The operating time of the blower 3 is determined by the operating circuit 8 as shown in Fig. 4(c).
The filter media winder 9 winds up a fixed length of filter media at fixed intervals according to the control output of the control circuit 5, and this operation continues as shown in FIG. 4(d) until the filter media runs out. is repeated. Here, the time for winding the filter material and the length of the filter material are determined by the route condition of the vehicle, the period of the cooling season,
It is determined by the air volume of the indoor blower 3, and generally, the length of the filter medium and the cumulative time are set so that winding of the filter medium can be completed in one season.

Note that when the indoor blower 3 is stopped, the operation is stopped as shown in FIG. 4(b), so the time during this period is not integrated.

[Problem to be solved by the invention]

Since the conventional air conditioning control device is configured as described above, the air volume of the indoor blower 3 is small during the low speed operation time, and the amount of dust attached is small compared to when the indoor blower 3 is operated regularly. Filter media winder 9 of roll filter device 7
is operated in synchronization with the operation of the indoor fan 3, regardless of whether it is regular or low speed, which reduces the efficiency of filter media usage.Recently, the cooling season has become longer, and the use of all-season air conditioning has increased. As a result, there were problems such as the length of the filter medium being insufficient.

This invention was made to solve the above problems, and by operating the roll filter device in accordance with the speed of the indoor blower, it is possible to implement air conditioning control while improving the efficiency of filter media use. The purpose is to obtain an air conditioning control device that can.

[Means to solve the problem]

An air conditioning control device according to the present invention includes an indoor blower used for air conditioning in a car, and an automatic winding type filter medium provided on the intake side or discharge side of the indoor blower to filter air returned to the car. a winder, and an air conditioning control unit that controls the speed of the indoor blower and causes the filter medium winder to wind the filter medium to a certain length when the operating time of the indoor blower reaches a set value, The winding control circuit of the air conditioning control unit calculates the operating time from the cumulative value of time set in advance for each speed of the indoor blower, and when the operating time reaches the set value, winds up the filter medium. It is designed to make the user perform the following steps.

[Effect]

The air conditioning control device according to the present invention intermittently outputs the operation signal of the roll filter device as a pulse in accordance with the speed control state of the indoor blower in the air conditioner, integrates the pulse width time, and calculates the integrated result. By winding up the filter medium, the winding time of the filter medium of the roll filter device is extended with respect to the operating time of the indoor blower.

[Embodiments of the invention]

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

In FIG. 1, 1 is an air conditioner, 2 is an operating circuit provided in the air conditioner 1, 3 is an indoor blower provided in the air conditioner 1, 4A is an operating circuit for the air conditioner 1 and the roll filter device, The air conditioning control unit to be controlled; 5 is a control circuit provided in the air conditioning control unit 4A; 6 is provided in the air conditioning control unit 4A; This is a winding control circuit that calculates the operation time and causes the filter media winder to wind the filter media for a certain length when the operating time reaches a set value. Reference numeral 7 denotes the above-mentioned automatic winding-type roll filter device that uses a filter medium to filter the air returned to the vehicle interior of the air conditioner 1, 8 is an operating circuit provided in the roll filter device 7, and 9 is the roll filter device 7.
This is a filter media winding machine installed in

Further, FIG. 4 is a time chart showing signal states of each part of the block.

Next, the operation will be explained.

First, the control circuit 5 of the air conditioning control unit 4A inputs operation control signals of regular, low speed, and stop to the operation circuit 2 of the air conditioner 1. The operation circuit 2 receives these operation control signals and controls the speed of the indoor blower 3 as shown in FIG. 2(a),
Make the desired air volume adjustment. On the other hand, the one-winding control circuit 6 receives the operation signal (regular, low speed, stop) of the indoor blower 3 from the control circuit 5, and sends it to the operation circuit 8 in the roll filter device 7 as shown in FIG. 2(b). , generates and outputs an automatic winding filter device operating signal with a pulse duty and a set pulse width. Therefore, upon receiving the signal, the operating circuit 8 integrates the operating time as shown in FIG. 2(c), and when the integrated time reaches the set value AHr,
For the first time, a pulse as shown in FIG. 2(d) is output to the filter medium winder 9 to cause the filter medium to be wound once. In other words, each time the specified cumulative time is reached, the filter medium is rotated once to expose a new portion to the passage of air returning to the vehicle interior.

In addition, in the above embodiment, the case where the speed switching of the indoor fan 3 is set to two stages of regular speed and low speed was explained, but the speed of the indoor fan 3 is controlled two or more times without steps, and pulses corresponding to each of these speeds are set. The width and pulse duty may be set arbitrarily and the pulse widths may be integrated, and the same effect as in the above embodiment can be obtained.

〔Effect of the invention〕

As described above, according to the present invention, the winding control circuit of the air conditioning control unit calculates the operating time from the integrated value of the time set in advance for each speed of the indoor blower, and the operating time reaches the set value. In this case, since the filter material is wound up, the efficiency of using the filter material in the roll filter device can be increased, and as a result, the filter material can be used for a long period of time.

[Brief explanation of drawings]

Fig. 1 is a block connection diagram showing an air conditioning control device according to an embodiment of the present invention, Fig. 2 is a time chart showing signals of each part of the block in Fig. 1, and Fig. 3 is a diagram showing a conventional air conditioning control device. The block connection diagram shown in FIG. 4 is a time chart diagram showing signals of each part of the block in FIG. 3 is an indoor blower, 4A is an air conditioning control section, 6 is a winding control circuit, and 9 is a filter media winding machine. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Claims] an indoor blower used for air conditioning in a car; an automatic winding-type filter medium winder having a filter medium installed on the intake side or discharge side of the indoor blower to filter air returned to the car; and an air conditioning control unit that controls the indoor blower and causes the filter medium winder to wind up the filter medium for a certain length when the operating time of the indoor blower reaches a set value. Determine the above driving time from the cumulative value of the time set in advance for each speed,
An air conditioning control device comprising a winding control circuit that winds up the filter medium when the operating time reaches the set value.