JPS63246493A - Operation control device for blower - Google Patents

Abstract

PURPOSE:To operate a blower for a predetermined time with a proper air quantity arbitrarily selected when an air quantity in an auto operation mode is improper, by providing preferential operating means operable by a switch. CONSTITUTION:High-temperature thermo elements 4 and 5 measure a temperature at an upper portion of a cooking range, and a low-temperature thermo element 6 measures a temperature in a chamber. In an auto operation mode, a blower 2 is normally operated with a notch according to a temperature difference between the high-temperature thermo elements 4 and 5 and the low- temperature thermo element 6, thus conducting a temperature difference operation mode. When the blower 2 is operated with a medium notch, for example, in the temperature difference operation mode, and every time a key switch 21 is depressed, the notch is shifted in the order of strong, weak, medium and strong to forcibly operate the blower 2 with a specified notch for a predetermined time. After the predetermined time is elapsed, the temperature difference operation mode is restored. Thus, when an air quantity in the auto operation mode is improper, the notch is arbitrarily selected to operate the blower with a proper air quantity for the predetermined time.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Responsibility] The present invention relates to an operation control device for a blower such as a range hood fan, which measures temperature and automatically operates the blower.

[Conventional technology]

In recent years, there has been an increase in the number of kitchen ventilation fans and other blowers that are automatically operated using temperature sensors, humidity sensors, miscellaneous gas sensors, and the like. This is not only because it is troublesome to operate the switch every time you cook, but also because if you neglect to operate the blower, it may cause a lack of oxygen and have a negative effect on the human body. This automatic operation is disclosed, for example, in JP-A-57-101234, and in a four-notch system of stop, weak, medium, and strong, when the temperature etc. rises to a predetermined value, the automatic operation changes from stop to weak to strong. The two notches of the blower change from weak to medium and from medium to strong 12. When Fl() is used, the blower changes from strong to medium, medium to weak, and weak to stop. When switching the notches, a delay operation is performed and the sensor output It is designed to absorb sudden changes in

[Problem that the invention seeks to solve]

With conventional blower operation control devices such as those described above, the optimum air flow rate of the blower varies depending on its installation and usage conditions, and the blower's notch is determined by the output signal from the sensor. in case of,
There have been problems in that the necessary optimum air flow rate may not be obtained, and it is not possible to take measures to obtain the optimum air flow rate.

This invention was made in order to solve this problem, and when the air volume of the air blower during automatic operation is not optimal, the air blower can be switched arbitrarily and operated at an appropriate air volume for a predetermined period of time. The purpose is to obtain a control device.

[Means for solving problems]

A blower operation control device according to the present invention includes a blower having a switching notch, a switch for switching the notch of the blower, a high-temperature thermostat for measuring the temperature rising from a heat source, and a low-temperature thermostat for measuring the ambient temperature of the blower. , calculation means for calculating the temperature difference between the high temperature thermostat and the low temperature thermostat; a switching means for switching the notch of the blower based on the result of the calculation means; and a switching means for switching the notch of the blower based on the result of the calculation means; It consists of a preferential operation means for operating the m-feeder.

[Effect]

In this invention, since the preferential operation means operates the blower for a predetermined time by operating a switch in priority over the switching means, even if the air volume of the blower during automatic operation is not optimal, the weight of the blower can be adjusted arbitrarily for a predetermined time. It becomes possible to change the

〔Example〕

FIGS. 1 to 7 are diagrams showing an embodiment of the present invention,
In Figure 1, (1) is the range hood fan body, (
2) is a blower that has 3 taps and can blow air in 3 stages of low, medium, and strong, [3] is a lighting lamp, and (411'5)l measures the temperature above the range. 61 is a temperature sensor that measures the indoor temperature (hereinafter referred to as a low-temperature thermometer).
, ■ is a control panel having control switches and indicator lamps, and 6 is a cooking range.

Figure 2 is a control circuit diagram, and (58) is a microcomputer with A/D conversion (hereinafter referred to as microcomputer).
The D conversion input ports are 0 and KI.

Immediately after reset, all other terminals are output at "H" level.
(13) is a display section, and (14) is an oscillation circuit section.

In the A/D conversion circuit section, (15) <16) is a resistance, (41 (5) is a high temperature thermometer, (6) is a low temperature thermometer, and the low temperature thermometer (6) and the high temperature thermometer (4) (51 are A thermistor whose resistance constant changes with temperature changes is used, and as the resistance value changes, the voltage division value between the connected resistors (15) and (16) changes.The value is transferred to the microcontroller (58). A/D conversion is manually input into K.K□, and the temperature value of each sensor is calculated in the microcomputer (58).

In the key power section (11), (17) to (22) are temporary key switches, and (60) to (62) are pull-up resistors. The microcomputer (58) controls each key switch (17).
) to (19) are pressed, first set the INT and So S1 terminals to input mode, and
2 to "I(" level) and S to rl and J levels. Then, when the key switches (20) to (22) are pressed, TNT and 5O1Sl fall to the "L" level and the key switch is pressed. Next, by setting S2 to "L" level and S3 to rH) level,
When the key switches (17) to (19) are pressed, INT, So, and Sl fall to the "L" level, and the key switch (17) is ) to (22), a buzzer (57) will sound to confirm the key reception.
) is turned on for 75m5.

In the load drive unit (12), ■ is the blower explained in Fig. 1, (3) is the lighting lamp, and (39) to (41) are the blowers (two switches for setting 2 to weak, medium, and strong, respectively). Directional thyristor, (42) is a bidirectional thyristor for switch of lamp (3), (23) to (26) are Fo to F of microcomputer (5th), and driver for power amplification of boat.
It is turned on when the input is "L" level, and the output structure is an oven corefter. (31) to (34) are drivers (23) to (2)
6) is the LED that indicates the ON state, (27) to (30) are the current limiting resistors of this LED, and (35) to (38) are the gate current limiting resistors of the bidirectional cyrisks (39) to (42). It is.

The driving procedure of the bidirectional thyristor (39) - F<42) is as follows: D. When the ? port of the microcomputer (58) goes to the "L" level, for example, the F0 port goes to the "L" level, the driver (23) turns on. When the driver (23) is turned on, current flows from the gate 1- of the directional thyristor (39) to the resistor (35), which is connected in parallel with this resistor and connected in series, or through the resistor ED (31) and the resistor 1-. and flows into the output of the driver (23). Then, the bidirectional si-risk (39) is turned on and the air blower 1t21 starts operating.

In the display section (13), (50) to (56) are display LEDs, (43) to (49) are current limiting resistors for these LEDs, and the D ports (D, to D6) of the microcomputer (58) are When the level becomes "L", the LED lights up. (57) is a buzzer that self-oscillates and sounds when D reaches the "L" level.

In the oscillation circuit section (14), (59) is a resistor, which causes the microcomputer (58) to self-oscillate and serves as a system clock source for the built-in programmer.

FIG. 3 is a front view showing the control panel (7) of the range hood main body (1), (31) to (34), (5
0) to (56) are the display LEDs shown in FIG.
) to (22) are the same! It's a simple key switch.

Figure 4 is a flowchart in manual operation mode, Figure 5
The figure shows flowcharts 1- and 6 in automatic driving mode.
The figure is a flowchart showing the notch selection during automatic operation, and FIG. 7 is an explanatory diagram showing the difference in temperature between the high temperature thermostat and the low temperature thermostat and the air volume (notch of the blower) selection during the automatic operation.

The operation of the blower operation control device configured as described above will be described below.

The functions of the range hood body (1) are manual operation mode,
It is broadly divided into automatic driving modes. When the key switch (17) is pressed, the LED (50) repeatedly turns on and off each time the key switch (17) is pressed. When LED (50) is lit, it is automatic operation mode, and when LED (50) is off, it is manual operation mode.

In manual operation mode, the blower (2) notch can be selected by pressing the key switch (21). Each time the key switch (21) is pressed, the F button of the icon (58) operates and the driver (23) to (25)
) are successively ONL, , bidirectional thyristor (39
)-(41) are turned ON sequentially one by one. Along with this, the notch of the blower (2) is sequentially switched from weak to medium → strong → weak.

When viewed from the control panel (7) side, the display LED
The lights will light up in the following order: weak (33) → medium (32) → strong (31) → weak (33).

There are two ways to stop the blower (21).

One is to press the key switch (21). Then, the drivers (23) to (25) all become 0FFL, and the bidirectional thyristors (39) to (41) all become OFF. Therefore, the power supply to the blower m (2!l) is stopped, and the blower f2 is stopped.

At this time, the microcomputer (58) backs up the notch immediately before the stop.

The other is to activate the timer operation mode,
When you press the key switch (22), each time you press it, the display LED
is 5 minutes (51) → lO minutes (52) → 30 minutes (53) → 5
minutes (51), and the blower (2
) starts and stops after the displayed time has elapsed. At this time as well, the moi controller (58) backs up the notch just before it stops.

The timer operation mode operates not only when the blower (2) is in operation but also when it is stopped, and when the key switch (22) is pressed, the blower (2) operates with the notch backed up by the microcomputer (58) before it stops. , it will stop after the displayed time. Since the air volume switching key can be pressed even during timer operation, the air volume can be set arbitrarily by the user. In the timer operation mode, the time display LED also indicates the remaining time. For example, timer setting 3.
If it is set to 0 minutes, immediately after the setting, the LED (5
3) lights up, and when the timer time elapses and the remaining time reaches 10 minutes, the 30 minute display LED (53) goes out and the 10 minute display LED (52) lights up. When the remaining time reaches 5 minutes, the 10 minute LED (52) will disappear and the 5 minute LED will disappear.
(51) lights up. After another 5 minutes, the timer operation stops, the 5 minute display LED (51) turns off, and the blower (21) also stops. By pressing the off key switch (20) during the timer operation, the timer is cleared and the blower (21) can be stopped.

Next, the automatic driving mode will be explained.

The operation of the blower (a) is basically based on the A/D conversion data of the high temperature thermostat G41 (51) and the low temperature thermometer (6). There are the following three operating conditions for the blower (2) in the automatic operation mode.

The first is a high temperature thermostat (4+ (5)) and a low temperature thermostat (6).
In the differential temperature operation mode, as shown in the flowchart of FIG.
(The voltage change value due to the temperature change in 51 is calculated by the microcontroller (58
) and the voltage change value due to the temperature change of the low-temperature thermometer (6), which is converted into temperature in the microcomputer (58). As shown in Char 1, if the blower (21) is in a stopped state, it will blow a weak notch at a temperature difference of T2 or less, and if it is in a weak notch state, it will blow a medium notch at a temperature difference of T4 or less, and if the temperature difference is T1 or less. If it is in the middle notch air blowing state, it will blow strong notch air if the temperature difference is T6 or less, weak notch air will be blowing if the temperature difference is T or less, and if it is in the strong notch blowing state, it will blow medium notch air if the temperature difference is T5 or less. Temperature values from T1 to T6 are set by the sensitivity adjustment key switch (18).When the key switch (18) is pressed, the display changes to standard (5
5) → High sensitivity (56) → Low sensitivity (54) → Standard (55)
will be forwarded to. The difference in temperature setting values between low sensitivity, standard, and high sensitivity is that low sensitivity is T higher than standard, standard is higher T than high sensitivity,
The value of -T is small, making it difficult for the air blowing notch to change due to temperature differences. The second method is to check the temperature change rate of the high temperature thermostats (4) and (5) and operate the blower (2) at a low notch. If the temperature difference between thermometer 4) (9) and low temperature thermometer (6) is reversed and it takes time to reach the temperature difference level T2 during differential temperature operation, or the amount of heat in the cooking range is low. If it takes time to reach T2, do this to speed up the operation of the blower (2).Assuming that the A/D conversion of the high temperature thermometer (A) (51) is performed every 4 seconds, the A/D conversion data is If 8 pieces of data are stored in memory and replaced sequentially each time new data is input, it is possible to hold data for 28 seconds.During that 28 seconds, one of the other data, Reka Shirakawa, can be preset for the last data. When the temperature rises below the preset temperature (for example, 1°C), that is, within 28 seconds, the blower (2) starts operating at a low notch.The operating time is 3 minutes.Within 3 minutes. When the temperature difference between the high temperature thermometer (4) [51 and the low temperature thermometer (6) reaches T2, the operation mode based on the rate of change shifts to the temperature difference operation mode.Even after 3 minutes, the temperature difference did not reach T2. If so, stop the blower (2).

The third is a forced operation mode. Although automatic operation basically does not require human operation, forced operation is a method of artificially forcibly switching the notch in response to automatic notch selection by the microcomputer (58).

When the blower (2) is operating, for example, if the middle notch is used to blow air, each time the key switch (21) is pressed, the notch will go from high to high.
After switching from weak to medium to strong and being forced to operate at the specified notch for 3 minutes, it shifts to the operation mode based on temperature difference or the operation mode based on the rate of change of high temperature thermometer (4) (9).Blower (2) When stopping, first switch the key (
Press 21) to make the notch weaker.

Thereafter, each time the key switch (21) is pressed, the power changes from medium to strong to weak, and as described above, after forced operation for 3 minutes, the mode shifts to the operation mode based on temperature difference or the operation mode based on rate of change.

The above is the explanation of the operation in the manual operation mode and the automatic operation mode.

The key switch (20) is a key switch that has an "off" function, and this key switch is applied to all functions other than the lamp person and cut edge. When the key switch (20) is pressed, the mode becomes manual, timer operation stops, and the blower [2
1 will also be suspended.

Further, the range hood body (1) constantly monitors the temperature above the range using A/D conversion, and issues a warning when the temperature rises abnormally. That is, high temperature thermometer G41 (temperature of 5 - is 6
When the temperature reaches 0°C abnormally, a buzzer (57) sounds to notify the user that an abnormal temperature rise has occurred.

Gate current is turned off when switching bidirectional thyristor
Since there is a delay of up to half a cycle from the time the bidirectional thyristor turns off, the
The power supply to m5 is stopped to prevent two bidirectional thyristors from turning ON at the same time. [Effects of the Invention] As explained above, this invention provides a blower having a switching notch and a switch for switching the notch of this blower. and,
a hot thermostat for measuring the temperature rising from the heat source; a low-temperature thermostat for measuring the ambient temperature of the blower; and calculation means for calculating a temperature difference between the high-temperature thermostat and the low-temperature thermostat;
By providing a switching means for switching the notch of the blower based on the result of the calculation means, and a priority operation means for operating the blower for a predetermined time by operating the switch in priority over the switching means, the blower can be operated during automatic operation. Even when the air volume is not optimal, the blower can be switched arbitrarily and operated for a predetermined period of time at an appropriate air volume.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a range hood using an embodiment of the present invention, Fig. 2 is a circuit diagram showing an embodiment of the invention, and Fig. 3 is a front view of the same control panel. Figure 4 also shows the flowchart in manual operation mode.
1 Figure 5 is a flowchart in the automatic operation mode, Figure 6 is a flowchart showing notch selection during automatic operation, and Figure 7 is a flowchart showing the difference in temperature between the high temperature thermostat and the low temperature thermostat during automatic operation, and the wind ■ ( of the blower)
・Sochi) is an explanatory diagram showing selection. In the figure, (2) is the blower, (4) ((5) is the high temperature thermostat, (6) is the low temperature thermostat, (9) is the power supply circuit, 00)
is the A, , , /D conversion section, (Il,) is the key human power section,
(12) is a load drive section, (13) is a display section, (14) is an oscillation circuit section, and (58) is a man-con.

Claims (2)

[Claims] (1) A blower having a switching notch, a switch for changing the notch of the blower, a high-temperature thermostat for measuring the temperature rising from the heat source, a low-temperature thermostat for measuring the ambient temperature of the blower, the high-temperature thermostat and the low-temperature thermostat. calculation means for calculating the temperature difference between A blower operation control device comprising: (2) The blower operation control device according to claim 1, wherein the priority means is provided to operate the blower at the notch when the switch is activated.