CN219454023U - Ignition control device of multi-burner stove - Google Patents

Abstract

The utility model discloses an ignition control device of a multi-burner stove, and relates to a stove ignition device. The device comprises a control module, a pulse oscillation module, and a high-voltage packet and signal comparison module, wherein the number of the high-voltage packet and the number of the signal comparison module are consistent with that of the furnace heads; the output end of the pulse oscillation module is connected with the input end of the high-voltage package, and a plurality of high-voltage packages are connected with ignition rods in a plurality of furnace heads in a one-to-one correspondence manner; the fire detection rods are arranged in all the furnace heads and are in one-to-one correspondence with the input ends of the signal comparison modules, and the output ends of the signal comparison modules are in one-to-one correspondence with the acquisition ends of the control modules; all the furnace heads are connected with an air supply pipe, and electromagnetic valves are arranged on the air supply pipe; the control output ends of the control module are connected with the control input ends of the electromagnetic valves in a one-to-one correspondence mode. The utility model has simple and ingenious structure, can control the independent flameout protection function of the multi-burner, has smaller influence by the service life of the detection element, and greatly improves the reliability of the flameout protection function.

Description

Ignition control device of multi-burner stove

Technical Field

The utility model relates to a stove ignition device, in particular to an ignition control device of a multi-stove burner stove.

Background

Currently, the stoves on the market only have single-path flame detection, and if a single stove burner of a double-stove burner or a multi-stove burner stove is flameout, all the stove burners are closed at the same time. For example, a 4-burner boiler is provided, and when one burner is flameout, the 4 burners are closed at the same time, so that the normal operation of the whole stove can be influenced. Therefore, the electric control device of the multi-burner oven disclosed by the application number CN201820115759.8 adopts a control module, burner branch controlled gas proportional valves correspondingly arranged on the burner gas branches and a plurality of controlled burner ignition modules corresponding to the burners, wherein the control signal input ends of the burner branch controlled gas proportional valves and the control signal input ends of the controlled burner ignition modules are respectively and electrically connected with the control module, and the control module is also connected with a flame detection module, so that the monitoring and control of the multi-burner are realized.

However, as known in the art, the flame detecting element of the flame detecting module is mostly a thermocouple, an infrared probe, an ultraviolet probe, or the like. However, for the stove with high use frequency, the detection element is in a high-temperature state for a long time, so that the detection element is easy to age, the service life of the detection element can be influenced, the burner flameout protection function of the stove is easy to lose efficacy, and the reliability of the stove is low.

Disclosure of Invention

The utility model aims to solve the technical problem of providing an ignition control device of a multi-burner stove aiming at the defects of the prior art.

The utility model relates to an ignition control device of a multi-burner stove, which comprises a control module, a pulse oscillation module, a high-voltage packet and a signal comparison module, wherein the number of the high-voltage packet and the number of the signal comparison module are consistent with that of burners; the output end of the pulse oscillation module is connected with the input end of a high-voltage packet, and a plurality of high-voltage packets are connected with ignition rods in a plurality of furnace heads in a one-to-one correspondence manner; the fire detection rods are arranged in the furnace heads, the fire detection rods are connected with the input ends of the signal comparison modules in a one-to-one correspondence manner, and the output ends of the signal comparison modules are connected with the acquisition ends of the control modules in a one-to-one correspondence manner; all the furnace heads are connected with an air supply pipe, and electromagnetic valves are arranged on the air supply pipe; and a plurality of control output ends of the control module are connected with control input ends of the plurality of electromagnetic valves in a one-to-one correspondence manner.

The ignition rod and the fire detecting rod extend to the upper part of the furnace end and are positioned in the flame of the furnace end.

The signal comparison module comprises a comparator, a filtering and clamping protection unit and a voltage dropping resistor; one end of the voltage-reducing resistor is connected with the fire detecting rod through the fire detecting wire, the other end of the voltage-reducing resistor is connected with the input end of the filtering and clamping protection unit, the output end of the filtering and clamping protection unit is connected with the positive input end of the comparator, the reverse input end of the comparator is grounded, and the output end of the comparator is connected with a control end of the control module.

The filtering and clamping protection unit comprises a first diode, a second diode, a first capacitor, a second capacitor and a first resistor; the anode of the first diode, the cathode of the second diode, one end of the first capacitor and one end of the first resistor are all connected with the voltage dropping resistor, and the cathode of the first diode, the anode of the second diode and the other end of the first capacitor are all grounded; the other end of the first resistor is connected with the positive input end of the comparator, and the connection end of the first resistor and the comparator is grounded through a second capacitor.

The fire detecting line is grounded through the piezoresistor.

All the furnace heads are grounded.

Advantageous effects

The utility model has the advantages that: through the high-pressure package, the signal comparison module, the ignition stick, the fire detection stick and the electromagnetic valve, which are consistent with the number of the furnace heads, each furnace head has independent flame detection and air supply on-off control functions, and the independent control of the furnace heads is realized. That is, each burner can independently detect flame signals and perform an independent flameout protection function. Solves the problem that when one burner is flameout, a plurality of burners are simultaneously turned off.

The ignition rod and the fire detection rod are arranged in the furnace end, and electric signals are transmitted through the electric conductivity of flame, so that the control module can acquire the level of the fire detection rod in real time through the signal comparison module, and then the flameout protection function of the furnace end is realized through the control of the electromagnetic valve. Compared with the traditional flame detection module adopting the modes of thermocouples, infrared rays, ultraviolet rays and the like, the structure is simpler and more ingenious, the influence of the service life of the detection element is smaller, and the reliability of the flameout protection function is greatly improved.

Drawings

FIG. 1 is a schematic diagram of the circuit connections of an ignition control apparatus according to the present utility model;

fig. 2 is a circuit diagram of a signal comparison module according to the present utility model.

Wherein: 1-pulse oscillation module, 2-high voltage package, 3-furnace end, 4-ignition stick, 5-fire detection stick, 6-signal comparison module.

Detailed Description

The utility model is further described below in connection with the examples, which are not to be construed as limiting the utility model in any way, but rather as falling within the scope of the claims.

Referring to fig. 1, the ignition control device of the multi-burner stove of the present utility model comprises a control module, a pulse oscillation module 1, and a high-voltage packet 2 and a signal comparison module 6, the number of which is consistent with that of the burner 3. In the present embodiment, the number of the jamb 3 is four. The furnace end 3 is made of metal and is grounded. The burner 3 is provided with an ignition rod 4 and a fire detecting rod 5 which extend above the burner, and the ignition rod 4 and the fire detecting rod 5 are separated. After ignition, both the ignition rod 4 and the flame rod 5 can be positioned within the flame of the burner 3. In addition, the ignition rod 4 and the fire detecting rod 5 are installed in an insulating manner with the furnace end 3, and specifically, the ignition rod 4 and the fire detecting rod 5 can be wrapped with ceramic materials at the interference part with the furnace end 3, so that short circuits are prevented.

The control module is realized by adopting a singlechip technology, which is the prior art, and the utility model does not improve the control module, so that more details are not needed.

The output end of the pulse oscillation module 1 is connected with the input ends of four high-voltage bags 2. The pulse oscillation module 1 and the high-voltage package 2 adopted in the embodiment are all existing modules in a stove, and the utility model does not improve the modules.

Each high-voltage packet 2 is correspondingly connected with an ignition rod 4 in one of the furnace heads 3 so as to convey a high-voltage pulse signal to the furnace heads to realize ignition. The four fire detection bars 5 are connected with the input ends of the four signal comparison modules 6 in a one-to-one correspondence manner, and the output ends of the four signal comparison modules 6 are connected with the plurality of acquisition ends of the control module in a one-to-one correspondence manner. Because the ignition rod 4 and the fire detection rod 5 are both positioned in the furnace end 3, after the furnace end 3 ignites, because the flame has conductivity, an ignition electric signal on the ignition rod 4 is transmitted to the fire detection rod 5, thereby realizing acquisition by the signal comparison module 6.

Since the voltage of the ignition electric signal is high, and the input voltage of the control module is low, typically 3.3V, the ignition electric signal collected from the flame rod 5 needs to be subjected to a step-down process. The specific structure of the signal comparison module 6 is as follows.

As shown in fig. 2, the signal comparison module 6 includes a comparator U2, a first diode D7, a second diode D8, a first capacitor C21, a second capacitor C22, a first resistor R23, a dropping resistor R22, and a varistor RV6. The probing wire is grounded through the piezoresistor RV6 so as to prevent the phenomenon that the diode or the capacitor breaks down due to overhigh voltage of the ignition electric signal. One end of a voltage dropping resistor R22 is connected with the fire detecting rod 5 through a fire detecting wire, the other end of the voltage dropping resistor R22 is grounded with the anode of a first diode D7, the cathode of a second diode D8, one end of a first capacitor C21 and one end of a first resistor R23, and the cathode of the first diode D7, the anode of the second diode D8 and the other end of the first capacitor C21 are grounded. The other end of the first resistor R23 is connected with the positive input end of the comparator U2, and the connection end of the first resistor R23 and the comparator U2 is grounded through the second capacitor C22. The inverting input end of the comparator U2 is grounded, and the output end of the comparator U2 is connected with a control end of the control module.

When a flame is present on the burner, the ignition electrical signal on the ignition rod 4 will be transmitted to the flame rod 5. The ignition electric signal on the fire detection rod 5 is transmitted to the positive input end of the comparator U2 after passing through the piezoresistor RV6, the voltage-reducing resistor R22 and the filtering composed of the first diode D7, the second diode D8, the first capacitor C21, the second capacitor C22 and the first resistor R23 and the voltage-reducing filtering of the clamping protection unit. Since the inverting input of the comparator U2 is grounded, the comparator U2 will output a high level. On the contrary, if there is no flame on the burner, no electric signal is input to the positive input terminal of the comparator U2, and the electric potential of the positive input terminal is identical to the electric potential of the negative input terminal of the comparator U2, so that the comparator U2 outputs a low level.

All the furnace heads 3 are connected with an air supply pipe, and electromagnetic valves are arranged on the air supply pipe. The four control output ends of the control module are connected with the control input ends of the four electromagnetic valves in a one-to-one correspondence manner. When the control module receives the electric signal from the comparator to be at the low level, the burner 3 corresponding to the comparator is in the flameout state, and at the moment, the control module sends a control signal to the electromagnetic valve corresponding to the burner 3 to close the burner 3, so that the gas leakage is prevented, and the flameout protection function of the burner 3 is realized.

The working principle of the utility model is as follows: when the stove is used, the gas main valve and the electromagnetic valve are both opened, and then the ignition switch on the stove is started, so that the pulse oscillation module 1 works to generate pulse electric signals, and the pulse electric signals are input into the high-voltage package 2. The high-pressure package 2 then outputs an ignition signal to the ignition rod 4, thereby achieving ignition of the gas at the burner 3. At this time, the ignition electric signal on the ignition rod 4 will be transmitted to the flame rod 5. The ignition electric signal on the fire detection rod 5 is transmitted to the positive input end of the comparator U2 after passing through the voltage-dependent resistor RV6, the voltage-reducing resistor R22 and the voltage-reducing filter of the filtering and clamping protection unit. Since the inverting input of the comparator U2 is grounded, the comparator U2 will output a high level to the control module. At this time, the output state of the connection end of the control module and the electromagnetic valve is not changed.

If a certain burner is flameout, no flame is transmitted between the ignition rod 4 and the fire detecting rod 5, so that no electric signal is transmitted to the comparator by the fire detecting rod 5, the positive input end of the comparator is not input with electric signal, the electric potential of the positive input end is consistent with the electric potential of the reverse input end of the comparator, and the comparator outputs a low level. At this time, the level received by the control module is low, which indicates that the burner corresponding to the comparator is in a flameout state, and the control module sends a control signal to the corresponding electromagnetic valve to shut off the pipeline, thereby realizing the flameout protection function of the burner. While other furnace heads are not affected and are in a working state.

While only the preferred embodiments of the present utility model have been described above, it should be noted that modifications and improvements can be made by those skilled in the art without departing from the structure of the present utility model, and these do not affect the effect of the implementation of the present utility model and the utility of the patent.

Claims (6)

1. The ignition control device of the multi-burner stove is characterized by comprising a control module, a pulse oscillation module, a high-voltage packet and a signal comparison module, wherein the number of the high-voltage packet and the signal comparison module are consistent with that of the burners; the output end of the pulse oscillation module is connected with the input end of a high-voltage packet, and a plurality of high-voltage packets are connected with ignition rods in a plurality of furnace heads in a one-to-one correspondence manner; the fire detection rods are arranged in the furnace heads, the fire detection rods are connected with the input ends of the signal comparison modules in a one-to-one correspondence manner, and the output ends of the signal comparison modules are connected with the acquisition ends of the control modules in a one-to-one correspondence manner; all the furnace heads are connected with an air supply pipe, and electromagnetic valves are arranged on the air supply pipe; and a plurality of control output ends of the control module are connected with control input ends of the plurality of electromagnetic valves in a one-to-one correspondence manner.

2. The ignition control of a multi-burner stove of claim 1 wherein the ignition bar and the flame rod each extend above the burner and are located within the flame of the burner.

3. The ignition control device of a multi-burner stove according to claim 1, wherein the signal comparison module comprises a comparator, a filtering and clamping protection unit and a voltage dropping resistor; one end of the voltage-reducing resistor is connected with the fire detecting rod through the fire detecting wire, the other end of the voltage-reducing resistor is connected with the input end of the filtering and clamping protection unit, the output end of the filtering and clamping protection unit is connected with the positive input end of the comparator, the reverse input end of the comparator is grounded, and the output end of the comparator is connected with a control end of the control module.

4. The ignition control apparatus of a multi-burner stove according to claim 3, wherein the filtering and clamping protection unit comprises a first diode, a second diode, a first capacitor, a second capacitor and a first resistor; the anode of the first diode, the cathode of the second diode, one end of the first capacitor and one end of the first resistor are all connected with the voltage dropping resistor, and the cathode of the first diode, the anode of the second diode and the other end of the first capacitor are all grounded; the other end of the first resistor is connected with the positive input end of the comparator, and the connection end of the first resistor and the comparator is grounded through a second capacitor.

5. A multi-burner stove ignition control according to claim 3 wherein the fire trace is grounded via a varistor.

6. A multi-burner stove ignition control according to any one of claims 1 to 3 wherein all of the burners are grounded.