JPH02254251A - Blower controlling circuit - Google Patents

Abstract

PURPOSE:To simplify a control part, to improve operability, and to reduce a cost by a method wherein a microcomputer switches an airflow of a blower, decides whether continuous operation or timer operation is effected, and sets a time during timer operation by means of a control input depending upon the length of a contact motion time. CONSTITUTION:A microcomputer 5 is provided with an opening and closing reading means 9 to decide the opening and closing state of a contact from a change in a voltage produced due to opening and closing of a contact through control of a control switch 4 and a measuring means 10 to measure a contact closing state time in which a contact opening state is produced again after a contact closed state is produced. The microcomputer is further provided with a retention timer deciding and setting means 11 to decide the presence of timer operation decided from a contact closing time by the measuring means 10 and measure a timer set time during timer operation, and a operation notch switching means 12 having a function to switch airflow notch in linkage with closing of a contact, count a time during timer operation, and switch airflow notch responding to the counting result. This constitution simplifies a control part, improves operability, and reduces a cost.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Fll Field] This invention relates to a blower control circuit that switches the operation of a blower.

"Prior Art" Conventionally, a blower control circuit for switching the blower operation between continuous operation, timer operation, strong notch operation, and weak notch operation has a configuration as disclosed in, for example, Japanese Unexamined Patent Publication No. 55-85835. There are configurations such as those shown in Fig. 0 and Fig. 11, but in both of these, the operation section that issues the switching command is composed of multiple contacts. Continuous operation, stop 1 as shown in the figure
It is equipped with an operation switch 20 having contacts corresponding to intermittent operation, the latter being a rotary contact 21 or operation contacts 22, 23.
．． It is equipped with 24.

For example, in the control circuit shown in FIG. 11, the air volume is sequentially switched as shown in FIG. 12 by opening and closing the air volume switching contact 23, and the timer time setting contact 24
Timer operation 1 is started as shown in Fig. 142 by opening and closing the
The time period changes sequentially. In the case of FIG. 9, the timer time is set by operating the setting knob 26 of the time setting resistor 25.

[Problem to be solved by the invention] Conventional blower control circuits use multiple contacts to individually switch the air volume and timer operation, so the configuration of the operating unit that issues these switching commands is complicated. And the space is bigger, which is a win. Also, since multiple operating parts are lined up on the operating section, it is also cost-effective in terms of operability.
This includes six issues that should be improved in terms of aspects.

This invention was made in order to solve such conventional problems, and aims to provide a blower control circuit that has a simple operation section, does not require space, has good operability, and can reduce costs. .

[Means for Solving the Problems] A blower control circuit derived from this invention uses a microcomputer to measure the time during which a single contact is closed2, and switches between various types of operation according to the difference in this time. It is configured as follows.

Further, another blower control circuit according to the present invention uses a microcomputer to measure the time during which a single optical switch is closed by a photo-interrupter, etc., and switches various types of operation according to the difference in this time. It is configured as follows.

Furthermore, another blower fM circuit according to the present invention uses a microcomputer to measure the time during which a single magnetic switch such as a reed switch or a Hall element is closed, and switches various types of operation according to the difference in time. It is configured to perform the following.

Furthermore, in another blower control circuit according to the present invention, a single contact is provided in the remote control mechanism, the time during which this single contact is closed is measured by a microcomputer, and various types of blower control circuits are provided according to the difference in this time. It is configured to switch between operations.

[fil=for] In the blower control circuit of the present invention, the air volume of the blower is switched based on the magnitude of the contact operating time of a single contact or a functional element equivalent thereto, and the determination of continuous operation or timer operation and the timer operation are performed. It is possible to set the time during operation, and the operation section is simple and easy to operate.

[Implementation PA] FIG. 1 is a circuit diagram showing an embodiment of a blower control circuit according to the present invention. That is, the fan motor 2 of the blower is connected to a commercial power source 1. The fan motor 2 has a tap with a strong notch and a weak notch, and is configured to be able to switch between two strong and weak levels of operation: low air volume and high air volume. The control system that controls the fan motor 2 includes a DC power supply circuit 3 that forms a DC power supply for the control system from a commercial power source 1, a single-contact operation switch 4, a microcomputer (hereinafter referred to as microcomputer) 5, and a display element. 6 and a bidirectional thyristor 7.8 for switching the wind. A single-contact operating switch/1 and a display element 6 such as several light emitting diodes constitute an operating section, and the opening/closing of the operating switch/1 is input to the microcomputer 5 as an operating input for switching the operation of the blower. As shown in FIG. 2, the microcomputer 5 includes an open/close reading means 9 that reads voltage changes caused by opening and closing contacts by operating the operation switch 4 and determines whether the contacts are open or closed; Measuring means 1 for measuring the contact closed state time from when the contact is closed until the contact is opened again in the open/closed state of the contact
0, the presence or absence of timer operation determined by the contact closing time by the measuring means 10, the remaining timer determination/setting means 11 which determines and measures the timer setting time during timer operation, and the air volume notch not interlocked between the contacts. There is an operation notch switching means 12 which has a function of counting time during switching and timer operation and switching the air volume notch according to the count, and a bidirectional thyristor 7.8 which outputs an output linked to the instruction from this operation 71-switching means 12. and a load driving means 13 for driving the display element 6 and the display element 6. The microcomputer 5 works as shown in the flowchart of FIG. 4, and determines whether or not to operate the timer based on the contact closing time of the operation switch 4 and to set the timer operation time, as shown in the timing chart of FIG. This is done by comparing the presence/absence determination time set point Tl, the timer setting time determination set points T2 to TN, and the contact closing time of the operation switch 4.

When the operation switch 4 is operated as shown by A in FIG. 3, when the contact closing time is within the timer operation determination time setting point T1, only the air volume is switched. Similarly, B in Figure 3
As shown in , if the contact closing time exceeds the timer operation determination time set point T1 and is operated within the timer setting time determination set point T2, the air volume is switched and the timer operation is set, and the timer time is set to D minutes. be done. In addition, as shown by C in Figure 3, if the contact closing time exceeds the timer setting time judgment set point 3 and is operated within the timer setting time judgment set point TN, the air volume is switched and the timer operation is set. , the timer time is set to F minutes. That is, depending on the contact closing time when operating the operation switch 4, switching of the air volume of the blower and timer operation can be simultaneously selected, and the timer operation time can also be set. By setting the time required for one operation of the operation switch 4 to be within the presence/absence determination time set point T1, it is also possible to perform an operation that only switches the air volume.

Note that the operation input may not be based on contacts, but may be an optical switch 14 using a photo interrupter or the like as shown in FIG. 5, or a magnetic switch 15 using a reed switch, a Hall element, etc. as shown in FIG. In the case of FIG. 5, the closed state of the contacts in the previous example corresponds to the blocking of light, and the closing time of the contacts corresponds to the duration of the light passing through. Further, in the case shown in FIG. 6, the contacts are closed by operating a magnet or the like.

Furthermore, the operation section is composed of a remote control mechanism 16 such as an infrared remote control, and as shown in FIGS. 7 and 8, a single contact operation switch 4 incorporated in the remote control mechanism 16 performs the same operation as described above. In addition, the seventh
In the figures and FIG. 8, 17 represents a receiving/driving circuit, 18 represents a demodulating circuit for the optical signal modulated by the remote control mechanism, and 19 represents a transmitting circuit for the remote control mechanism.

[Effects of the Invention] As described above, in the blower control circuit of the present invention, switching of the blower air volume, timer operation setting, and timer time setting can be performed by operating a single contact or an equivalent functional element. The operation part is simple, does not require space, is easy to operate, and has the effect of reducing costs.

[Brief explanation of drawings]

Fig. 1 is a circuit diagram showing an embodiment of the blower control circuit according to the present invention, Fig. 2 is a program function block diagram of the microcomputer in Fig. 1, and Fig. 3 is a timing diagram showing the relationship between contact closing time and timer setting time. FIG. 4 is a flowchart of the microcomputer, FIGS. 5 and 6 are circuit diagrams showing other embodiments, FIGS. 7 and 8 are circuit diagrams showing still other embodiments, and FIG. , FIG. 10, and FIG. 11 are circuit diagrams showing a blower control circuit as a conventional example, respectively.
FIG. 12 is an explanatory diagram showing state transitions caused by operation of the blower control circuit in FIG. 1.1. In FIG. 0, 2 is the fan motor;
4 is an operation switch, 5 is a microcomputer, 6 is a display element, 14
15 is an optical switch, 15 is a magnetic switch, and 16 is a remote control mechanism. Note that the same reference numerals in the figures indicate the same or equivalent parts. Agent: Masuo Oiwa (and 2 others) Figure 12 Figure 10? 1 Voluntary action to write procedural amendments) '1

Claims (4)

[Claims] (1) A microcomputer enables switching of the air volume of the blower, determination of continuous operation or timer operation, and setting of timer operation using operation input based on the magnitude of the contact operating time of a single contact. A blower control circuit characterized by: (2) The blower control circuit according to claim 1, wherein the single contact point is an optical switch using a photo interrupter or the like. (3) The blower control circuit according to claim 1, wherein the single contact is a magnetic switch such as a reed switch or a Hall element. (4) A blower control circuit characterized in that a single contact point is incorporated in a remote control mechanism such as an infrared remote control.