JPS6291696A - Controller of fan motor - Google Patents

Abstract

PURPOSE:To improve operating performance by operating a change-over switch, being interlocked with on-and-off operation of a manual air flow setting switch so that it may be possible to select either a time control in response to a constant air flow or a time control in response to a decreasing air flow by means of the same electric conduction control cam switch. CONSTITUTION:A manual air flow setting switch 1 having a movable contact piece 1e for making change-over selection of speed regulating high . medium .low taps 8a-8C of a motor 8 is provided. And, so is an air automatic air flow reduction cam switch 3 for secularly operating, by means of a cam 9 a movable contact piece 3c, which selectively switches sped regulating taps 8b, 8c. Also, a change-over switch 2 having a movable contact piece 2c to be selectively connected to the above respective movable pieces 1e, 3c is provided and, so is an electric conduction control cam switch 5 with a movable contact piece 5b to be put in contact with separated from said movable contact piece 2c by operating a cam 10. And, a series circuit consisting of a time driving power supply 6 and an electric conduction control cam switch 7 is parallely connected to the above circuit in order to make tree rotation of the cam 12 of said switch 7 together with other cams 9, 10.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to an electric fan motor control device that can selectively perform time-regulated operation with a constant air volume and time-regulated operation with a reduced air volume.

(b) Prior Art As a technology prior to the present invention, there is a fan motor control device described in Japanese Patent Application Laid-Open No. 59-37298.

This motor control device includes a blower motor having a plurality of speed adjustment taps, a timer equipped with a cam rotated by a drive source, a cam switch whose opening/closing is controlled depending on the outer circumferential shape of this cam, and an air volume manual setting switch for switching and selecting an adjustment tap, and a cam area on the outer periphery of the cam for forming a constant air volume for energizing the motor via the speed adjustment tap selected by the air volume manual setting switch; The cam area is divided by an off area and forms an automatic air volume reduction cam area in which the cam switch automatically performs a speed control tap selection operation to reduce the air volume in the latter half of the time period. It is. Therefore, the - fainting of a single cam is the area where the constant air volume is controlled over time, and the other side is the area where the air with a reduced air volume is controlled over time, and two cutting areas are required. It is possible to select two types of time control by using it every half cycle.As a result, if the time control is set to 3 hours, a 6-hour drive source must be used, which is twice as much as normal. It is necessary to use something that can measure time. Further, the setting operation cannot be performed by simply rotating the device by a certain amount, and the operability is poor.

(c) Problems to be Solved by the Invention The present invention provides a fan motor control device that can maximize the controllable time provided by the time drive source and unifies the operability.

(d) Means for solving the problem The present invention includes a manual air volume setting switch for selecting and selecting the speed control tap of the motor;
an automatic air volume reduction cam switch that is connected in parallel to the manual setting switch and reduces the air volume over time; a changeover switch that selects between the manual setting switch and the reduction cam switch in conjunction with turning on and off of the manual setting switch; The problem is solved by means of forming a motor control device by an energization control cam switch directly connected to the switch and a time drive source that interlocks the cams of both cams inches.

(E) Function The present invention controls the operating time with a current control cam switch,
The operation is performed on the side selected by the changeover switch within the operating time, making maximum use of the controllable time provided by the time drive source, and the changeover of the changeover switch is linked to the switching operation of the manual setting switch. This can be done automatically.

(f) Embodiment The present invention will be explained based on a first embodiment shown in FIGS. 1 to 7 and a second embodiment shown in FIG.

A first example will be explained.

1 and 3 to 5 are circuit diagrams showing different setting states of the motor control device of the present invention. Figure 1 is a circuit diagram with the air volume manual setting switch (1) set to 1-strong operation and the maximum setting time (3 hours) in this example, and Figure 2 is the state of Figure 1. Figure 3 is a plan view of the operation setting section when set to 1. Figure 3 is a circuit diagram of continuous operation with the setting set to 1+. Figure 4 is a diagram of the operation setting section when the air volume manual setting switch (1) is turned off.

Figure 5 shows the circuit diagram of the switch set to the maximum setting time with the changeover switch (2) connected to the automatic air volume reduction cam switch (3). It is a circuit diagram with the reduction cam switch (3) set to "off".

Figure 6 shows the timer display (4), automatic air volume reduction cam switch (3), energization control cam switch (5), and time drive R (
timer motor) (6) energization control cam switch (7)
FIG. 7 is a time chart showing the on-off state of the airflow rate, and FIG. 7 is a pattern diagram showing the change in airflow rate due to the airflow rate automatic reduction cam switch (3).

The motor control device has a motor 8) which has drawn out the speed adjustment taps (8a), (8b), and (8c) for "strong", "medium", and "weak", and the speed adjustment taps (8a), (8b), and (8c). an air volume manual setting switch (1) having strong, medium, and weak contacts (la), (lb, and lc), a disconnecting contact (1d), and a movable contact piece (1e) connected to Tap(
8b) (8c) are connected to the contacts (3a) (3b) and the movable contact piece (3c) that connects and disconnects from the contacts (3a) (3b).
and a cam (9) that operates the movable contact piece (3c) over time.
), a first contact (2a) connected to the movable contact piece (1e) of the manual setting switch (1), and a movable contact piece (1e) of the reduction cam switch (3); 3c) and a switching movable contact piece (2c) that switches in conjunction with the movable contact piece (1e).
a changeover switch (2) consisting of a changeover switch (2);
A contact (5a) that reads the switching movable contact (2c) of ) and an energization control force 11 switch (5). The commercial 'rlL source (11) is connected to the motor 8) and the movable contact piece (5b) of the energization control cam switch (5).The time drive source (6) and the energization control cam switch (7) are connected in series. The circuit is connected in parallel to the aforementioned circuit.The energization control cam switch (7) has a fixed contact (7a) and a movable contact (7b).
) and the force A (1
2). The cams (9), (10), and (12) are manually set to one weight using the operation knob (13), and rotated to one weight over time using the time driving source (6).

The outer periphery of the cam (12) has an OFF region (<12a) in which the fixed contact (7a) and the movable contact piece (7b) are not opened, and an ON region (12b) in which the movable contact piece (7b) is closed. The cam (10) has an OFF area (10a) and a continuous ON area (10b) formed in a range corresponding to the OFF area (12a) of the cam (12), and an ON area (12b) of the cam (12>) on the outer circumference of the cam (10). )
It has a time ON region (10c) formed in a range corresponding to . The force l, (9) an OFF resistor formed on the outer periphery in a range corresponding to the OFF region (12a>) of the cam (12).
region (9a) and the ON region (12b) of the cam (12).
) The movable contact (3c) formed in the range corresponding to the contact (
Medium speed operation area (9b) connected to 3a) and movable contact (3a)
It has a low speed operation region (9c) in which the movable contact (3C) is connected to the contact point 3b) and an intermittent operation region (9d) in which the movable contact (3C) is connected to and separated from the contact point (3b). OF of the cam (10)
The F region (10a) and the iON region (10b) correspond to the OFF region (9a) of the cam (9). The time ON region (10c) of the cam (10), the 0Nfli region <12b of the cam (12>), the medium speed operation region (9b) and the low speed) V rotation region (9c) of the cam (9), and the intermittent Driving area (
9d> corresponds to the maximum setting time (3 hours). The medium speed operation region (9b) and the low speed operation region (9c)
The intermittent operation region (9d) is formed in a range corresponding to each hour obtained by dividing the maximum set time into three.

Each contact point and contact piece (5a>(5b), (7a)(7b), (3c)(3a) by the cam (9)(10)<12)
) (3b) The contact timing is performed as shown in the hatched area in FIG.゛The operation of the motor (8) is selected as follows. First, when the setting is set to V as shown in FIG. 3, only the contact point (5a) and the contact piece (5b) of the energization control cam switch (5) are brought into contact, so that the time period El! [(6) cannot be rotated completely and is operated continuously at the speed selected by the manual setting switch (1).

Next, after setting the desired operating speed using the manual setting switch (1), turn the operating knob (13).

When the desired time is set, the state shown in FIG. 1 will be obtained. By setting an arbitrary operating speed using the manual setting switch (1), the contact (2a) and the contact piece (2c) of the changeover switch (2) are in contact with each other, and the air volume manual setting switch (1) is in contact with the contact (2a) and the contact piece (2c). ) is operated for the time set by the energization control cam switch (10).

Further, when the air volume manual setting switch (1) is turned to "1 off" and the operation knob (13) is turned by a certain amount, the state shown in FIG. 4 is obtained. Since the manual setting switch (1) is set to 1 off, the changeover switch (2) switches between the contact (2b) and the contact piece (2).
c) is connected to the automatic reduction cam switch (3). Therefore, the motor (8) changes the air volume according to a predetermined pattern by the automatic reduction cam switch (3). The pattern is as shown in Fig. 7.The starting point of the operation changes depending on the amount set by the operation knob (13) and starts from the middle of the pattern.

As described above, the setting operation by the operation knob (13) is always constant, and the controllable time of the time drive source (6) can be effectively utilized, and the air volume remains the same depending on whether the manual setting switch (1) is turned on or not. It can be used for either time-based ventilation or time-based ventilation where the air volume decreases over time.

The second embodiment shown in Fig. 8 is a cam switch (3) that reduces air volume by one movement.
A spring-type timer is used as a time drive source for the energization control cam switch (5), and the energization control cam switch (7) and timer motor (6) as in the first embodiment are not required.

Note that the present invention is not limited to the above-described embodiments, and may be implemented with various changes without departing from the configuration, operation, and effects. For example, by variously changing the force j of the automatic air volume reduction cam switch (3) and the shape of (9), it is possible to freely reduce the air volume. This includes changes such as adding intermittent operation to the front.

(g) Effects of the Invention The present invention operates a changeover switch in conjunction with turning on and off the manual air volume setting switch, thereby using the same energization control cam switch to selectively use time control with the same air volume and time control where the air volume decreases. This makes it possible to utilize the maximum controllable time of the drive source, and improves operability.

[Brief explanation of drawings]

Figures 1 to 7 show the first embodiment. Figure 1 is a circuit diagram of the same landscape time control state, Figure 2 is a plan view of the operation setting part in the same state, and Figure 3 is a continuous The circuit diagram in the operating state, Fig. 4 is the circuit diagram in the air volume reduction time control state, Fig. 5 is the circuit diagram in the off state, Fig. 6 is the time chart of each cam switch,
FIG. 7 is an air volume reduction pattern diagram, and FIG. 8 is a circuit diagram in the same state as FIG. 1 in the second embodiment. (1)...Manual air volume setting switch, (2)...Selector switch, (3)...Automatic air volume reduction cam switch, (
5)...Electricity control cam switch, (6)...Time drive source.

Claims (1)

[Scope of Claims] 1. An air volume manual setting switch that switches and selects the speed control tap of the motor, an air volume automatic reduction cam switch that is connected in parallel to the manual setting switch and that reduces the air volume as time passes, and the manual setting switch. It consists of a changeover switch that selects the manual setting switch and the reduction cam switch in conjunction with the on/off state, an energization control cam switch connected in series to the changeover switch, and a time drive source that interlocks the cams of both of the cam switches. Electric fan motor control device. 2. The electric fan motor control device 3 according to claim 1, in which the time drive source is formed by a timer motor; Claim 1, in which the time drive source is formed by a wind-up timer A motor control device for the electric fan described above.