JPH04106344A - Device for interlocking ventilating fan and combustion apparatus - Google Patents

Abstract

PURPOSE:To always keep the ventilating capacity optimal by a method wherein a plurality of levels of ventilating capacity are set for a ventilating fan according to the amount of the fuel supplied to a combustion apparatus measured by a combustion sensor and the output of the combustion sensor is corrected according to the number of burners at work and the kind of the combustion device. CONSTITUTION:A combustion sensor 5 detects the condition of combustion at a gas range 1 and the ventilating capacity of a ventilating fan 2 is varied according to the condition of the combustion. To increase safety, a heat sensor and a smoke sensor are provided so that, in case of abnormality in the gas range 1, the supply of gas may be turned off and the ventilating fan 2 may run at full capacity. During operation of the gas range 1, if the ventilating capacity of the ventilating fan 2 selected by one of switches SWH, SWM, and SWL is lower than the adequate one corresponding to the combustion detected by the combustion sensor 5, priority is given to the selection by a switch SWH, SWM, or SWL for a time and, after an elapse of a specified time, the ventilating capacity is shifted to that corresponding to the output of the combustion sensor 5. Information relating to the number of burners at work and the kind of the burners is transmitted from the gas range 1 to a control circuit 7 and by comparison the applied voltage is corrected.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a ventilation fan interlocking device for a combustion appliance, such as a gas cooker, which sets the ventilation capacity of the ventilation fan according to the combustion state of the combustion appliance.

[Conventional technology]

Traditionally, this device has been designed to link the combustion of combustion equipment and the operation of the ventilation fan.When the combustion equipment is ignited, the ventilation fan operates at a predetermined ventilation capacity, and when the combustion equipment is extinguished, it returns to the state set by the manual selector switch. A ventilation fan is provided that starts or stops depending on the situation.
(See Publication No. 5739).

[Problem to be solved by the invention]

In the above configuration, the ventilation fan operates at a predetermined ventilation capacity while the combustion equipment is burning, regardless of the combustion state of the combustion equipment, so if the exhaust gas increases by adjusting the thermal power of the combustion equipment, There was a problem of insufficient ventilation capacity. The present invention aims to solve the above-mentioned problems, and the ventilation capacity of the ventilation fan is set according to the combustion state of the combustion equipment, so that the ventilation capacity is always maintained at an optimal state. The purpose is to provide a ventilation fan interlocking device for combustion equipment.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a combustion sensor that can obtain an output corresponding to the amount of fuel supplied to the combustion equipment;
A ventilation fan that discharges exhaust gas from combustion equipment outside, and combustion equipment detected by a combustion sensor! It is equipped with a control circuit that can set the ventilation capacity of the ventilation fan in multiple stages based on the fuel supply amount, and a correction section that corrects the output value of the combustion sensor according to the number of combustion ports and the type of combustion equipment. There is.

[Effect]

According to the above configuration, the amount of fuel supplied to the combustion equipment is detected by the combustion sensor, and the ventilation capacity of the ventilation fan is set based on the detected amount of fuel supplied, so that the exhaust gas is reduced by adjusting the thermal power of the combustion equipment, etc. Even if the ventilation capacity is increased or decreased, the ventilation capacity of the ventilation fan can be set to just the right amount, and the ventilation capacity can always be maintained at the optimal ventilation capacity. In addition, we have a correction section that corrects the output value of the combustion sensor according to the number of combustion ports and the type of combustion equipment, so if the combustion equipment is a gas range, the number of gas stoves, gas stove, grill, oven When it is necessary to change the ventilation capacity depending on the type of equipment used, etc., the ventilation capacity is controlled by a value that has been corrected for the amount of fuel supplied, and the ventilation capacity is controlled only by the amount of fuel supplied. This allows the ventilation capacity to be set more accurately than when

【Example】

In this embodiment, as shown in FIG. 2, the combustion equipment is a gas range 1 equipped with a gas stove, an oven, etc., and a ventilation fan 2 and lighting equipment 3 are installed in a range hood 4 provided above the gas range 1. It is assumed that the In the gas range, a gas flow rate sensor is disposed as a combustion sensor 5 (see FIG. 1) that can provide analog outputs corresponding to five gas flow rates. Further, the output value of the combustion sensor 5 is corrected by a correction unit (not shown) provided in the gas range 1 according to which of the appliances provided in the gas range 1 is being used. It looks like this. That is,
Corrections are made depending on the type, such as when using a gas stove or an oven, and in the case of using a gas stove, corrections are made according to the number of burners used. The output obtained by correcting the output of the combustion sensor 5 is taken out from a terminal 6 (see Fig. 1) provided on the gas range 1. As shown in Fig. 1, the output of the combustion sensor 5 is input to the control circuit 7. .The control circuit 7 is provided inside the range hood 4,
The output of the combustion sensor 5 is taken in through a terminal 8 provided on the range hood 4. Here, both terminals 6.8 are connected via a connector cord 9. Further, a switch panel 10 as a ventilation capacity setting section is provided on the front side of the range hood 4. The control circuit 7 controls the ventilation fan 2 and the lighting equipment 3 according to the input from the combustion sensor 5 and the settings on the switch panel 10, and is configured as shown in FIG. 3. The control circuit 7 will be explained below. The motor that drives the ventilation fan 2 has three selection terminals for selecting the ventilation capacity, and by connecting an alternating current power supply AC between any one of the selection terminals and the common terminal, the ventilation capacity can be set to high or medium. “
You can choose from three levels: , ``small''. Therefore, the control circuit 7 is provided with three selection terminals T, T, , TL connected to each selection terminal of the ventilation fan 2, and a common terminal TC connected to the common terminal of the ventilation fan 2. . Each selection terminal T, , T, T, is a contact point of relay Ryll, RFM, RFL, respectively.
+ r s + r L is connected to one end of the alternating current power supply AC, and the common terminal Tc is connected to the other end of the alternating current power supply AC. Therefore, any one of the contacts ri, r1r
When L is selectively turned on, the ventilation capacity of the ventilation fan 2 is selected from among the three levels described above. Further, the control circuit 7 is provided with terminals T + and T 2 connected to the lighting equipment so that the lighting equipment 3 is connected between both ends of the alternating current power supply AC via the contact r of the relay Ry. Therefore, when the contact r is turned on, the lighting fixture 3 lights up. Whether the contacts ru+rx, rt, and r are turned on or off is determined by the output level of the combustion sensor 5 and the operating state of each switch sw, sw, sw, , sw, sw provided on the switch panel 10. The output of the combustion sensor 5 is sent to three comparators CPi with different comparison voltages. Input to CPU and CPL. Each comparator CP1.
In lcp, cp, when the output level from the combustion sensor 5 exceeds the comparison voltage, the output level is set to "H", and the comparison voltage is obtained by dividing the power supply voltage by resistors R to R4. , comparator CP. is set to be the highest, and comparator CPL is set to be the lowest.Each comparator cp1.1.cp, CP,
If the comparison voltages of are respectively v, , v, , vL (vll>v.>VL), then the output health X of the combustion sensor 5 is 0.
≦X < V t,, vL≦X < V N, V s
≦X<V,,V. It can be classified into four ranges: ≦X. Here, the comparison voltages V□, V -, V L are, for example, V, = 9 V, V, -5 V, assuming the power supply voltage is 12 V,
Set V, , = IV, etc. Each comparator CPi,
CP'1. The CPL pressure is input to the level signal generation circuit 11. The level signal generation circuit 11 includes four output terminals, and when the output level of the combustion sensor 5 shifts from the other ranges to one of the four ranges described above, the level signal generating circuit 11 is configured such that when the output level of the combustion sensor 5 shifts from the other ranges to one of the four ranges described above, the output level changes from the corresponding output terminal for a predetermined period of time. It is designed to generate a level signal of ゛H°゛. On the other hand, each switch sw provided on the switch panel 10,
One end of sw, sw, sw, and swo is connected to the positive electrode of the power supply, and the other end is connected to each switch SW□, SW. Switch signal generation circuits 12+, 1.12)+, 1.2L, 12.1 corresponding to swt, sw, and swo, respectively
20. Any one switch SWH, S
If you turn on W,, S''fJ L, SW, SW o, the corresponding switch signal generation circuit 12M,
12M, ], 2L, ], 2. A switch signal that becomes "H" for a predetermined period of time is generated from the output terminals of 2.120.The four output terminals of the level signal generation circuit 11 are connected to OR circuits OR, . OR1, L, o Rt, , is connected to the selection circuit 13 via ORo. Also, each OR circuit OR,
At the input ends of ORM, OR,, there is a switch sw, respectively.
, , sw, l, swL corresponding switch signal generation circuit 12. ．． The output ends of 12P1.12L are connected. ! !
The selection circuits 13 are OR circuits OR, , OR, OR, respectively.
The output terminal of L is input to the cellar 1 to terminal S of the three R, -
OR circuits WO,, W○, , W whose output ends are connected to the reset terminals R of the S latches FF, FF, , F FL and the respective RS latches FF, FF, FF, , respectively.
It is equipped with an office lady. Each R-5 U・Nchi FFMFF,
OR circuit W Oh, W O, + connected to FFL
. At the input end of WOL, each R-S latch FF, FF. The output terminals of all other OR circuits that are not connected to the set terminal S of FF are connected to the set terminal S of FF. Each R-S latch FF, FF, FFFL is an integrated circuit commercially available under the name 4013, for example, and if the input to the set terminal S is "ON", the input to the reset terminal R is When the input is "H", the output of the output terminal Q becomes "L", and when the input to the set terminal S becomes "H", the output of the output terminal Q becomes "H", and , when the inputs to the set terminal S and the reset terminal R are both "L", the output of the output terminal Q is maintained at the previous state.6 Therefore, any one of the OR circuits OR ,,OR,O
When the output of RL rises, its OR circuit OR i, OR
,,ORt, whose output terminals are connected to the set terminal S, the outputs of the R-S latch FFs, FF, , FFL become "H", and the outputs of the other R-8 U-nochi FFs, l, and FFLs become "H". F,
, FFL's output becomes 'L'. Also, when the output of OR circuit OR, rises, all R-S latches F
The output of F,,FF,,FF,, becomes L". The output terminal Q of each R-S latch, F,,,FF,,FF, is connected to a NOT circuit, NOT,,,NOT,,,. N. Relay RV through TL, Ry 1.1. Ry
L and the output becomes °゛H'', the contacts rll, rs, of the corresponding relays Ry H, Ry, LRy L,
Turn on rL 6 Also, each R-S 1000F F,,,
The outputs of F F, , F F are connected to AND circuits AND, l, AND, which take the logical product with the output of the oscillation circuit 14, respectively.
, is also input to ANDL. AND circuit A N D s
, A N D *, A N D L are output from the NOT circuit N OT l, N OT 2 , N OT
It is connected to the light emitting diodes LD*, LD, , LDL via *. Therefore, during the period when the output of any R-S latch FF, FF, FFL is "H",
The corresponding light emitting diodes LDi, LDi, and LDL blink in synchronization with the output cycle of the oscillation circuit 14 (set to about 1 second). Each light emitting diode LD,
LD, , LDL are each switch Swu, sw, , swL
are arranged in the switch panel IO corresponding to each (
(See Ward 1). The above-mentioned NOT circuit NOT and AND circuit AND,
In addition to the output of the R-S latch FF, the output of the latch circuit FF consisting of a D flip-flop is connected to the OR circuit W.
Input via O+. The U-Sochi circuit FF is, for example, an integrated circuit commercially available as 4013, and when the input to the reset terminal R becomes °゛H°', the output of the output terminal Q becomes "'L°°,"
When the input to the reset terminal R is "L", the value input to the data terminal is output from the output terminal Q when the input to the clock terminal C rises. Furthermore, if there is no input, the output state is maintained. The selection circuit 13 is connected to the reset terminal R of the latch circuit FF.
The three outputs are the OR circuit WO2 and the rise detection circuit 15.
, is input via an OR circuit OR. OR circuit O
RI outputs the logical sum of the rise detection circuit 15 and the timer circuit 16 and connects it to the reset node terminal R of the latch circuit FF.
Enter. The timer circuit 16 has a trigger terminal (terminal ■)
When the input to starts, a predetermined time (for example, 20 seconds ~
The device is configured to start a time limit (adjusted within a range of 120 minutes) and output a trigger signal after a certain period of time has elapsed. The outputs of the OR circuit WO2 and the latch circuit FF1 are connected to the AND circuit AND through the AND circuit ANDS.
, and is ANDed with the inverted value of the output of the comparator CP. When the output of the AND circuit AND rises, the timer circuit 16 starts timing. Also, the output of the AND circuit AND is the NOT circuit N O
It is input to the data terminal of the latch circuit FF and the OR circuit OR1 via T<. The inverted value of the output of the comparator CPL is also input to this OR circuit OR. The output of the OR circuit OR, together with the output of the switch signal generation circuit 12o corresponding to the switch SW0, is connected to the AND circuit AND.
, and furthermore, the output of the AND circuit AND2 is inputted to the OR circuit ○R0 among the outputs of the trigger signal generation circuit 11, and is connected to the clock terminal C of the OR circuit OR and the latch circuit FF through the OR circuit WO1. is input. The output of this OR circuit OR4 is input to the reset terminal R of the latch circuit FF2 made up of 70 D flips and to the OR circuit OR. The outputs of the OR circuits ORM, OR, ORL are input to the set terminal S of the latch circuit F F2 via the OR circuit WO4, and the latch circuit F
Output terminal Q of F2 is connected to relay R via NOT circuit NOT.
, is connected to. Therefore, if the condition that the output from the output terminal Q of the latch circuit FF becomes °H'' is satisfied, the lighting fixture 3 lights up.The latch circuit FF is an integrated circuit commercially available as 4013, for example. Therefore, when the set terminal S becomes "H", the output terminal Q becomes "L", and when the reset terminal R becomes "H", the output terminal Q becomes "H", and the set terminal S and reset terminal R
When the input to the tarlock terminal C rises when the voltage is "'L", the input to the data terminal is obtained at the output terminal Q. Further, the output terminal Q becomes "H" when both the set terminal S and the reset terminal R are "H", and the inverted value of the output of the output terminal Q is obtained at other times.Control circuit Each of the above-mentioned parts of 7 is supplied with DC IEIII!
t is supplied. Next, the operation of the control circuit 7 will be explained. First, a case will be described in which the switches sw, sw, sw, sw, swo are operated while the gas range 1 is not lit. In this case, the output level of the combustion sensor 5 is less than the comparison voltage Vt of the comparator CPL,
One input of the AND circuit AND, AND2 is "H", and when the power is turned on, the R-S latch F F
,,F F,,F FL, the outputs of the output terminals Q of the latch circuits FF,,FF, are all at L''.If the switch SW is turned on in this state, the switch signal generation circuit 12 will output the switch. The signal is output and the latch circuit FF2
The output of output terminal Q of is inverted to "H". This results in
Contact r of relay RY turns on, and lighting fixture 3 lights up. At this time, the ventilation fan 2 does not operate. When any of the switches swll, sw, swL is turned on, a switch signal is output from the corresponding switch signal generation circuit 12□, 12N, 12L, and the OR circuits ORM, OR, . It is input to the selection circuit 13 via ORL and the corresponding R-S latch F
The output from output terminal Q of F,,F F,,F F, is ″
This causes the contacts of any corresponding relay Ry, 1. Ry M, R, y L, to
H+'N+rL is turned on, the ventilation fan 2 operates at the corresponding ventilation capacity, and one of the corresponding light emitting diodes LD, LD, LDL lights up. Further, the output of the selection circuit 13 is inputted to the data terminal of the latch circuit FF via the OR circuit WO2. By the way, the switch signal is also input to the set terminal S of the latch circuit FF2 via the OR circuit 28wo, so the output of the output terminal Q of the latch circuit FF becomes "H", and the output of the ventilation fan 2 is Upon activation, the lighting fixture 3 will light up. In this state, when the switch SWo is turned on, the switch signal generation circuit 12° outputs the switch signal, and since one input of the AND circuit A N D 2 is at 'H', the switch signal is It is input to the clock terminal C of the latch circuit FF through the AND circuit AND.The input to the data terminal of the latch circuit FF is at °'H" when the ventilation fan 2 is started, so the switch signal is input. At times, the output of the latch circuit FF becomes “'H”3
As a result, contact r 1 of relay Ry L is connected through OR circuit Wo1. Turn on. That is, when the ventilation fan 2 is operating at a large or medium ventilation capacity, it switches to a small ventilation capacity, and when it is operating at a small ventilation capacity, it continues to operate. Also, the switch signal is AND times nAN
Latch circuit F through Dz and OR circuit OR.
It is also input to the reset terminal R of the latch circuit FF2, and the output of the output terminal of the latch circuit FF2 becomes "L°', and the lighting fixture 3 is turned off.Furthermore, the output of the OR circuit OR4 is input to the OR circuit ORo.
All three outputs of the selection circuit 13 become 1-" because they are also input to The output from the circuit Wo2 becomes "L", and at this time, the re-input of the AND circuit AND becomes "H", and the timer circuit FI@16 is activated.Timer circuit 1
6 is activated, a trigger signal is output from the timer circuit 16 after a certain period of time to reset the latch circuit FF. That is, when the switch SWo is turned on while the ventilation fan 2 is operating, the ventilation fan 2 operates with a reduced ventilation capacity, and then stops after a certain period of time. Furthermore, when the switch SWo is turned on again during the time limit of the timer circuit 16, the clock terminal C of the latch circuit FF
By inputting a switch signal to the latch circuit F
The output of F + becomes L", and the ventilation fan 2 immediately stops. Next, a case will be explained in which the gas range 1 is lit. In this case, the comparators CpIf and c correspond to the output of the combustion sensor 5. The outputs of PH and CPL become “H”. If gas range 1 is lit, comparator CP
Since the output of L becomes "H", one input of the AND circuit ANDI and one input of the OR circuit OR1 become "Lo".The output from the combustion sensor 5 is an analog quantity, and
Since the level changes depending on the combustion state of the gas range 1, the comparators CP, CP, CP, ,+7) comparison voltages V)I, VM, V1. Each time the boundary of the four-stage range set based on Therefore, the ventilation fan 2 switches its ventilation capacity according to the output level of the combustion sensor 5. In addition, the latch circuit Since the output of FF2 becomes "H", when the gas range 1 is ignited, the ventilation fan 2 operates and the lighting fixture 3 lights up.On the other hand, the output level of the combustion sensor 5 is the comparison voltage of the comparator CP ■When the level signal falls below , the level signal input to the OR circuit OR0 is input to the clock terminal C of the launch circuit FF via the OR circuit WO1, and is also input to the launch circuit FF and the set terminal R. Therefore, just as when turning on the Sui Nochi SW, the lighting fixture 3
At the same time, the ventilation fan 2 operates for a certain period of time with its ventilation capacity reduced and then stops. By the way, gas range 1 is lit and comparator C
At least one output of PM, CP, CPL is "H"
, switch SW, , SWM, SWL
If any one of them is operated, the ventilation capacity of the ventilation fan 2 will be switched to the state set by the switches s w, I, s w, , s wL. That is, switch S
Priority is given to the operations W, +, SW-, and SWL. After that, if the combustion state changes and a level signal is generated from the level signal generation circuit 11, the ventilation wI2
Needless to say, the ventilation capacity of the air conditioner is automatically switched. In the above embodiment, the combustion state of the gas range 1 is detected by the combustion sensor 5, and the ventilation capacity of the ventilation fan 2 is switched depending on the combustion state. Safety can be improved by controlling the gas supply to be stopped and maximizing the ventilation capacity of the ventilation fan 2 when this occurs. In addition, when the gas range 1 is lit, the ventilation capacity of the ventilation N2 selected by the switches SW), SW, and SWL is greater than the ventilation capacity corresponding to the combustion state detected by the combustion sensor 5. When it is low, priority may be given to the selection by the switches sw, sw, , sw, etc., and the output of the combustion sensor 5 may be made to correspond to the output after a certain period of time. In addition, in the above embodiment, the output value of the combustion sensor 5 is corrected in the gas range 1, but the gas range 1 receives information corresponding to the number of ports used and the type of appliance used (the number of combinations is limited by the gas range 1). Therefore, information such as a number for each type of combination may be transmitted to the control circuit 2, and the control circuit 2 may correct the comparison voltage based on the information.

【Effect of the invention】

As described above, the present invention uses a combustion sensor to detect the amount of fuel supplied to the combustion equipment, and sets the ventilation capacity of the ventilation fan based on the detected amount of fuel supplied. Even if the ventilation capacity increases or decreases, the ventilation capacity of the ventilation fan can be set to just the right amount.
This has the advantage of being able to maintain optimal ventilation capacity at all times. In addition, we have a correction section that corrects the output value of the combustion sensor according to the number of combustion ports and the type of combustion equipment, so if the combustion equipment is a gas range, the number of gas stoves, gas stove, grill, oven When it is necessary to change the ventilation capacity depending on the type of equipment used, such as, the ventilation capacity is controlled by the value obtained by adding a correction to the amount of fuel supplied, and the ventilation capacity is controlled only by the amount of fuel supplied. This has the advantage that the ventilation capacity can be set more accurately than in the case of the conventional method.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is an external perspective view of the same, and FIG. 3 is a circuit diagram of a control circuit used in the same. 2... Ventilation fan, 3... Lighting equipment, 5... Combustion sensor, 7... Control circuit, 10... Switch panel, S
W, SW, SWL, SW, SW, Switch. Agent Patent Attorney Ishi 1) Choshichi

Claims (1)

[Claims] (1) Based on a combustion sensor that provides an output corresponding to the amount of fuel supplied to the combustion equipment, a ventilation fan that exhausts exhaust from the combustion equipment to the outside, and the amount of fuel supplied to the combustion equipment detected by the combustion sensor. A combustion device characterized by being provided with a control circuit that can set the ventilation capacity of a ventilation fan in multiple stages, and a correction section that corrects the output value of a combustion sensor according to the number of combustion ports and the type of combustion device. Ventilation fan interlocking device.