JPS63246495A - Operation control device for blower - Google Patents

Abstract

PURPOSE:To control the operation when a detection value of a high-temperature thermo element indicates a given-temperature change irrespective of an ambient temperature change, by operating a blower when the detection value of the hightemperature thermo element increases over a set value within a predetermined time. 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, when temperature data of the high-temperature thermo elements 4 and 5 stored by a microcomputer 58 for a predetermined time conducts a temperature increase preliminarily set, a blower 2 starts to be operated with a weak notch. When a temperature difference between the high-temperature thermo elements 4 and 5 and the low-temperature thermo element 6 reaches a predetermined value within a predetermined time, a temperature difference operation mode is selected to operate the blower 2 with a notch according to the temperature difference. Accordingly, the operation of the blower 2 can be started according to a temperature increase rate, and a time until the blower 2 is started is not elongated irrespective of an ambient temperature change.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] 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]

FIG. 8 is a circuit diagram showing a conventional air conditioner control device disclosed in, for example, Japanese Utility Model Application Publication No. 58-133732,
In the figure, (la) is a thermistor that detects room temperature, (
2a) (3a) (4a) (5a) is the resistance, (6a
) is a variable resistor, (7a) is a voltage comparator, (8a) is a current amplifier, and (9a) is a driving load.
a), resistor (2a) <3a> (4a) and thermistor (la) constitute a resistor bridge circuit.

The conventional air conditioner control device is configured as described above.
By adjusting the variable resistor (6a), the voltage difference between point A and point B is set to an appropriate value. The resistance value of the thermistor (la) changes due to temperature changes, and the voltage at point A becomes larger or smaller than the voltage at point B, so the output of the voltage comparator (7a) is reversed and the current amplifier (8a) The indoor temperature is adjusted by turning the drive load (9a) ON and OFF.

[Problem that the invention seeks to solve]

In the conventional air conditioner control device as described above, the load is controlled by changes in voltage based on the voltage difference between points A and B set by the variable resistor (6a). However, there is a problem in that a deviation occurs in the voltage difference between points A and B due to changes in ambient temperature, resulting in poor or poor sensitivity.

This invention was made to solve this problem, and is a blower operation control device that controls the blower when there is a certain temperature change in the detected value of the high temperature sensor regardless of the surrounding temperature change. The purpose is to obtain.

[Means for solving problems]

A blower operation control device according to the present invention includes a blower having a switching notch, a switching means for switching the notch of the blower, a high-temperature thermostat for measuring the temperature rising from a heat source, and a temperature signal from the high-temperature thermostat for a predetermined period of time. a measuring means that measures at intervals of and actuating means for actuating the switching means.

[Effect]

In this invention, when the temperature detected by the high-temperature thermostat rises above a set temperature rise within a predetermined period of time, the blower is activated.

〔Example〕

FIGS. 1 to 7 are diagrams showing an embodiment of the present invention,
In Figure 1, (1) is the range hood fan body, (
21 is a blower that has three taps and can blow air in three stages of low, medium, and strong, (3) is a lighting lamp, (41 (51 is a temperature sensor that measures the temperature above the range) (hereinafter referred to as a high-temperature thermometer) + +61 is a temperature sensor that measures the indoor temperature (hereinafter referred to as a low-temperature thermometer);
(7) is a control panel having control switches and indicator lamps, and (8) 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-transform input capacity is ,K,.

Immediately after reset, all other terminals are at the output "I" level. (9) is the power supply circuit section, 00) is the A/D conversion section, (1
1) is a key power section, (12) is a load drive section, (13) is a display section, and (14) is an oscillation circuit section.

In the A/D conversion circuit section αω, (15) and (16) are resistances, (4) (odor is a high temperature thermometer, (6) is a low temperature thermometer, low temperature thermometer (6) and high temperature thermometer 4) (phrase is a temperature A thermistor is used whose resistance constant changes depending on the change in resistance.
) (16) The partial pressure value of the voltage changes. The value is input to the A/D conversion input K o K s of the microcomputer (58), and the temperature value of each sensor is calculated within 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 (I7).
) ~ <19) is pressed, first set the INT, S, and st terminals to input mode, and then press S2.
is set to rH" level and S is set to "L" level. Then,
IN when key switches (20) to (22) are pressed
T,S, ,S,drops to the “L” level and it can be checked whether the key switch is pressed or not. Next, S
2 to "L level, S" to rHJ level, when key switches (17) to (19> are pressed, I respectively
When NT, So, and S fall to the "L" level, it is possible to check whether the key switch has been pressed. As described above, when the keys for the key switches (17) to (22) are accepted, the buzzer (57) is used to confirm the acceptance.
) is turned on for 75m5.

In the load drive unit (12), (2) is the blower explained in Fig. 1, (3) is the lighting lamp, and (39) to (41) are the blowers for setting the blower (2) to weak, medium, and strong, respectively. Sui・
The bidirectional thyristor for the border, (42) is the bidirectional thyristor for the switch of the lamp (3), and (23) to (26) are the power amplification drivers for the F and F3 boards of the microcomputer (58), and the input It is ON at "L" level, and the output structure is an oven collector. (31) to (34) are drivers (23
) to (26), the LEDs (27) to (3
0) is the current limiting resistor of this LED, (35) to (38
) are gate current limiting resistors of the bidirectional thyristors (39) to (42).

The driving procedure for the bidirectional thyristors (39) to (42) is as follows. The F boat of the microcomputer (58) is "L"
When the level, for example, the F0 boat reaches the Lj level, the driver (23) turns on. When the driver (23) turns on, current flows from the gate of the bidirectional thyristor (39) to the resistor (35), which is connected in parallel with this resistor. and the driver (23) connected in series through the L E D (31) and the resistor.
flows into the output of Then, the bidirectional thyristor (39
) is ONt, blower! 21 begins to operate.

In the display section (13), (50) to (56) are display LEDs, (43) to (49) are current limiting resistors for these LEDs, and the microcontroller (58)'s D baud (Do to D6) is When the level becomes "L", the LED lights up. (57) is a buzzer that self-oscillates and sounds when D7 goes to "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 program.

FIG. 3 is a front view showing the controller 1 to the roll panel (71) of the hood main body (1), (31) to (34),
(50) to (56) are the display LEDs shown in FIG.
17) to (22) are also key switches.

Figure 4 is a flowchart in manual operation mode, Figure 5
The figure is a flowchart in automatic operation mode, Figure 6 is a flowchart showing notch selection during automatic operation,
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 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).
58) F boat operates and drivers (23) to (25)
- Sequential ONL, bidirectional thyristor (39) ~
(41) are turned ON sequentially one by one. Along with this, the ventilation tR
In (2), the notch changes sequentially from weak → medium → strong → weak.

When viewed from the control panel ■ side, the display LEDs light up in the order of low (33), medium (32), high (31), and low (33).

There are two ways to stop the blower (2).

One is to press the key switch (21). Then, all of the drivers (23) to (25) become ○FFL, and all of the bidirectional cyrisks (39) to (41) become OFF. Therefore, the power supply to the blower (21) is stopped, and the blower (a) 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) → 10 minutes (52) → 30 minutes (53) → 5
minutes (51), and the blower (a) is
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. In the timer operation mode, the blower (2) operates not only when the blower (a) is in operation but also when it is stopped.When the key switch (22) is pressed, the blower (2) operates with the notch backed up by the microcomputer (58) before stopping. It will stop after the displayed time.The air volume switching key can be pressed even during timer operation, so the air volume can be set arbitrarily by the user.The time display LED in timer operation mode also indicates the remaining time.For example, if the timer is set to 30 minutes, Immediately after setting, the 30 minute display LED (53
) lights up, and when the timer time elapses and the remaining time reaches 10 minutes, the 30 minute display LED (53) disappears and the 1
The LED (52) indicating 0 minutes lights up. When the remaining time reaches 5 minutes, the 10-minute LED (52) disappears and the 5-minute LED (52) disappears.
1) lights up. After another 5 minutes, the timer operation will stop, the 5 minute display LED (51) will turn off, and the blower (a) will also stop.
By pressing 0), the timer is cleared and the blower (
■Can be stopped.

Next, the automatic driving mode will be explained.

The operation of the blower (2) is basically a high temperature thermostat (41f5)
Based on the A/D conversion data of the low temperature thermometer (6). There are the following three operating conditions for the blower (21) in automatic operation mode.

The first is a differential temperature operation mode between the high temperature thermostat G41 (51) and the low temperature thermostat (6), as shown in the flowchart showing notch selection during automatic operation in Fig. 6.
The temperature difference between the voltage change value due to the temperature change of 51 converted into temperature in the microcomputer (58) and the value converted into the voltage change value due to the temperature change of the low temperature thermometer (6) in the microcomputer (58) is calculated. As a result, as shown in flowchart 1 of FIG. 7 and FIG.
If the temperature difference is 2 or more, weak notch air will be blown. If the temperature difference is T4 or more, the medium notch will be blown, and if the temperature difference is T or less, it will be stopped if the temperature difference is T6 or more. Press to send strong notch air, T, to send weak notch air if the temperature difference is below, to T if it is strong notch, to send medium notch air if the temperature difference is below. Set by switch (18). When you press the key switch (18), the display changes to standard (55) each time you press it.
→ High sensitivity (56) → Low sensitivity (54) → Standard (55). The difference in temperature setting values between low sensitivity, standard, and high sensitivity is that low sensitivity is higher than standard, and standard is higher than high sensitivity.
The value of 6 is small, making it difficult for the ventilation notch to change due to temperature differences. The second method is to check the temperature change rate of the high temperature thermostat (41t5) and operate the blower (2) at a low notch. For example, when the cooking range (8) is started, the temperature value of the high temperature thermometer (41f51) and the low temperature thermometer (
6) If the temperature difference is reversed and it takes a long time to reach the temperature difference level T2 during differential temperature operation, or if the cooking range is not producing enough heat and it takes a long time to reach T2, the blower (This is done to speed up the start of operation of 21.

Assuming that A/D conversion of high temperature thermostats (4) and (5) is performed every 4 seconds, if 8 pieces of A/D conversion data are stored in memory and replaced each time new data is input, 28 seconds of data will be generated. can be maintained. During that 28 seconds, if one of the other data, Shirakawa Rei, is lower than the preset temperature (for example, 1°C) with respect to the final data, that is, if the preset temperature rises within 28 seconds, the air blower will be 1R ( 21 starts operating at a weak notch. The operating time is 3 minutes. Within 3 minutes, the temperature difference between the high temperature thermostat and 41 (51 and the low temperature thermostat (6) reaches T2, the operation mode changes from the rate of change mode. Shift to differential temperature operation mode. If the differential temperature does not reach T2 after 3 minutes, stop the blower.

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 strong to
The mode switches from weak to medium to strong, and after being forced to operate at the specified notch for 3 minutes, it shifts to the operation mode based on the temperature difference or the operation mode based on the rate of change of the high temperature thermometer (a) (5). ■When stopping the blower, first press the key switch (2)
Press 1) 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 (20)
] 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, when the temperature value of the high temperature thermostats (4) and (5) becomes abnormal by 60°C, the 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 switch is turned off, the
Power supply to m5 is stopped to prevent two bidirectional thyristors from being turned ON at the same time.

〔Effect of the invention〕

As described above, the present invention includes a blower having a switching notch, a switching means for switching the notch of the blower, a high-temperature thermostat that measures the temperature rising from a heat source, and a temperature signal from the high-temperature thermostat that is transmitted at predetermined intervals. a measuring means for measuring at a temperature, a storing means for storing a plurality of data obtained by the measuring means, and a switching means when other data has a predetermined temperature range with respect to the final data stored in the storing means. By being equipped with an actuation means for activating the air blower, the blower can be started at a rate of temperature increase, which has the effect that even if the ambient temperature changes, the time until the blower starts operating does not take longer. .

[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, Fig. 3 is a front view of the control panel, and Fig. 4 is a perspective view showing a range hood using an embodiment of the present invention. Similarly, the flowchart in manual operation mode, No. 5
Figure 6 is a flowchart showing the notch selection during automatic operation, and Figure 7 is a flowchart showing the notch selection during automatic operation. Figure 7 shows the difference in temperature between high temperature thermostat and low temperature thermostat and air volume (notch of blower) selection during automatic operation. FIG. 8 is a circuit diagram showing a conventional air conditioner control device. In addition, in the figure, 121 is a blower, (a), (5) is a high temperature thermostat, (6) is a low temperature thermostat, (9) is a power supply circuit, and 121 is an A/
D conversion part, (it> is key power part, (12) is load drive part, (I3) is display part, (14) is oscillation circuit part, (58
) is mancon.

Claims (1)

[Claims] A blower having a switching notch, a switching means for switching the notch of the blower, a high-temperature thermometer for measuring the temperature rising from a heat source, and a measuring means for measuring a temperature signal from the high-temperature thermometer at predetermined time intervals; A storage means for storing a plurality of pieces of data obtained by the measurement means, and an actuation means for activating the switching means when other data has a predetermined temperature range with respect to the final data stored in the storage means. A blower operation control device consisting of: