CN103900122A - Control method of active air inlet gas stove - Google Patents

Abstract

The invention relates to a control method of an active air intake gas cooker, the active air intake gas cooker includes a burner (10), a fan (2) and a gas pipe (9), a controller (101) and a The proportional valve (8) and fan of the aforementioned controller (101) are characterized in that: the aforementioned controller (101) has or is connected with an operating part (102), and the controller (101) is provided with The opening and closing degree of the corresponding proportional valve (8) and the preset table of the speed of the blower fan (2), the controller (101) can query the preset table when the external operation part (102) inputs the required firepower level, and Output control signal to described proportional valve (8) and described blower fan (2) respectively according to query result, control described proportional valve (8) to make the opening and closing degree of described proportional valve (8) be corresponding to this firepower grade The opening and closing degree of the proportional valve (8) is used to control the blower fan (2) so that the speed of the blower fan (2) is the speed of the blower fan (2) corresponding to the firepower level. The control method provided by the invention can make the gas fully combustible under different firepower levels of the gas stove.

Description

Control method of active air-inlet gas stove

technical field

The invention relates to a control method of an active air intake type gas stove.

Background technique

Most of the existing household gas stoves adopt the structure of natural injection of primary air and natural mixing of gas and air. This structure is difficult to control the mixing ratio and uniformity of gas and air, which ultimately affects the combustion efficiency of the gas stove.

There is also a structure that uses a fan to directly blow air to the burner. When the gas flow is adjusted, the primary air volume does not increase or decrease in proportion to the gas volume, resulting in insufficient or excess air volume, resulting in incomplete combustion when there is insufficient air volume. More CO is generated, or there is a large amount of excess air in the flue gas after combustion, which takes away heat energy, which also reduces the thermal efficiency of the gas stove.

For overcoming above-mentioned these defectives, gas cooker has been improved. A large number of technical solutions for secondary air supplementation have been proposed, such as the Chinese invention patent "Gas Stove Burner" with the patent number ZL200710188684.2 (the authorized announcement number is CN101162088B); device" (authorized announcement number is CN201448848U); application number is 201210170857.9 Chinese invention patent application publication "air intake burner on gas cooker" (application publication number CN102661606A) etc.

In order to further achieve accurate control of the mixing ratio of gas and air, many technical solutions have been proposed for improvement, such as the Chinese invention patent application publication "Electrically Controlled Proportional Adjustment Gas Stove" (application publication number is CN101886820A) with application number 200910039462.3; The Chinese invention patent application publication of 201310264505.4 "household gas stove" (application publication number is CN103292325A) and the like.

Because in the prior art, when controlling the mixing ratio of gas and air, only the primary air supply is controlled, and the supplementary air is not compared with the effective control of the secondary air supply. Whether the combustion of gas is sufficient or not, the supply of primary air There is an extremely important relationship between the air intake and the supplementary air intake of the secondary air. If one of them is ignored, the combustion efficiency cannot be brought into full play.

Contents of the invention

The technical problem to be solved by the present invention is to provide a control method of an active air-intake gas stove with high combustion efficiency in view of the above-mentioned prior art. The control method can make the gas burn fully in different firepower levels of the gas stove.

The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a control method of an active air-intake gas stove, the active air-inlet gas stove includes a burner, a fan and a gas pipe, and the lower end of the burner has an ejector tube , the upper end has a plurality of fire outlet holes, the aforementioned fan is used to actively supply air to the burner, the aforementioned gas pipe is set corresponding to the aforementioned ejector pipe and can provide gas, and it is characterized in that: the active air intake type gas stove is also It includes a controller and a proportional valve controlled by the aforementioned controller. The proportional valve is arranged on the gas pipe. The upper end of the burner also has a plurality of secondary air outlet holes arranged close to the aforementioned fire outlet holes. The air outlet of the fan The ends communicate with the inlet port of the injection pipe and the aforementioned secondary air outlet respectively, and the fan is controlled by the aforementioned controller, the aforementioned controller has or is connected to an operating part, and the controller is provided with a The preset form of the opening and closing degree of the proportional valve and the speed of the fan corresponding to different firepower levels, the controller can query the preset form when the external operation unit inputs the required firepower level, and output control signals to the controller according to the query results. The proportional valve and the blower are controlled so that the opening and closing degree of the proportional valve is equal to the opening and closing degree of the proportional valve corresponding to the firepower level, and the blower is controlled so that the speed of the blower is equal to the firepower level. The speed of the fan corresponding to the grade.

Preferably, the external operation part is a touch screen, and the fire power level can be freely adjusted between the maximum power and the minimum power of the gas stove.

As an improvement, the blower is connected to the controller, and can feed back the speed of the blower to the controller in real time. When the gas cooker is working at a certain firepower level under the input of the external operation part, with the working time If the speed of the fan fed back to the controller is not equal to the speed of the fan corresponding to the firepower level, the controller will repeatedly output control signals to the fan to control the fan to make the fan speed Continuously approach the speed of the fan corresponding to the fire power level until reaching the speed of the fan corresponding to the fire power level.

As a further improvement, the active air intake gas cooker in the present invention also includes an igniter connected to the controller, a flame detection unit, an alarm and a solenoid valve. The flame detection unit corresponds to the fire outlet. When the gas cooker is ignited After the igniter is ignited, the flame detection unit detects whether there is a flame. If there is, the igniter stops working. If not, the controller drives the igniter to ignite again for 1 to 3 times. The device sends an alarm signal of abnormal flame through the alarm device, and at the same time, the controller outputs a control signal to close the proportional valve and the fan, and outputs a control signal to close the electromagnetic valve of the gas stove.

As a further improvement, the active air intake gas stove also includes a temperature relay for overheating protection of the detected gas stove, the temperature relay is connected to the controller, and when the controller detects an abnormal action of the temperature relay, it will alarm the overheating fault The signal is alarmed by the alarm, and at the same time, the controller outputs a control signal to close the proportional valve and the fan, and outputs a control signal to close the electromagnetic valve of the gas stove.

Further improvement, when the gas cooker is in the working state and the controller cannot detect the feedback speed of the fan within the preset time, it will judge that the fan is abnormal, and the abnormal signal of the fan will be sent to the alarm through the alarm, and the controller will output the control signal to turn off The proportional valve and solenoid valve.

Further improvement, when the gas stove is in the working state, and after receiving the work timing signal input by the external operation unit, the controller will remind the timer expiration through the alarm 30 seconds to 60 seconds before the expiration of the work timing time. After the working timing expires, the controller outputs a control signal to close the proportional valve and the fan, and outputs a control signal to close the solenoid valve of the gas stove.

Compared with the prior art, the present invention has the advantage that: using the control method provided by the present invention, the active air-intake gas stove can be controlled according to a predetermined table at any required firepower level to make the proportional valve The opening and closing degree of the fan is the opening and closing degree of the proportional valve corresponding to the firepower level, and the fan is controlled so that the speed of the fan is the speed of the fan corresponding to the firepower level, so as to ensure that the gas can be used at any required firepower. Full burn under grade.

Description of drawings

Figure 1 is a schematic diagram of an active air intake gas stove in an embodiment of the present invention

Fig. 2 is a schematic diagram of an active air intake gas stove in an embodiment of the present invention (with the panel removed).

FIG. 3 is an enlarged schematic diagram of part of the structure in FIG. 2 .

FIG. 4 is a schematic front view of the base in FIG. 3 .

FIG. 5 is an exploded assembly view of FIG. 3 .

FIG. 6 is an exploded assembly view from another perspective of FIG. 3 .

FIG. 7 is a schematic view of the front structure of FIG. 3 .

Fig. 8 is a cross-sectional view along A-A direction in Fig. 7 .

Fig. 9 is a schematic diagram of the control principle of the active air intake gas stove in the embodiment of the present invention.

Fig. 10 is a control flow chart of the active air intake gas stove in the embodiment of the present invention.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

As shown in Figures 1 and 2, the gas cooker in this embodiment includes a housing 100, a burner 10, a fan 2, a gas pipe 9, a casing 1, a gas connector 3, a proportional valve 8 and a controller 101, the housing A cavity is formed inside the 100 for the setting of the burner 10, the fan 2, the gas pipe 9, the casing 1, the proportional valve 8 and the controller 101. The upper port of the housing 100 is provided with a panel 103, and the panel is provided with a touch panel as an operation part. The display screen 102 , the touch screen 102 is connected with the controller 101 . The burner 10, the fan 2, the gas pipe 9, the casing 1, the gas joint 3 and the proportional valve 8 in this embodiment are each set on the left and right sides. Both the fan 2 and the proportional valve 8 are controlled by the controller 101 , and the controller 101 is connected with an alarm 104 and a solenoid valve 105 . See Figure 9. The alarm 104 can be set separately, such as a buzzer, and different alarm codes can be displayed through the touch screen 102 at the same time.

As shown in Fig. 3, Fig. 5 and Fig. 6, the lower end of the burner 10 has an injection tube, and the upper end has a plurality of fire outlets and a plurality of secondary air outlets arranged near the fire outlets, and an igniter 106 and a flame are arranged next to the fire outlets. Detecting unit (not shown in the figure), gas pipe 9 corresponding injection pipes are provided with and can provide fuel gas, casing 1 is arranged on the below of burner 10 and covers the lower end of burner 10, and the inner chamber of this casing 1 and two The secondary air vents are in fluid communication with each other,

The fan 2 is arranged on one side of the casing 1 and can introduce air into the casing 1 under the condition of power on. Specifically, the fan 2 can be sealed and fixed to the port on the side of the casing 1 through rivets. The air outlet end of the blower fan 2 communicates with the air inlet port of the ejector pipe and the air outlet hole of the secondary air respectively. The proportional valve 8 is located on the gas pipe 9 .

The gas connector 3 is arranged on the other side of the casing 1 and is sealed and connected with the casing 1 . The outer end of the gas connector 3 is connected with the gas pipe, so that the gas can be introduced into the injection pipe of the burner 10 .

The burner 10 includes a base 7 , an outer fire cover 5 , an inner fire cover 4 and an air filling ring 6 . As shown in Figure 4, the lower end of the base 7 has an inner injection tube 73 and two outer injection tubes 74, and the upper end is formed with an inner mixed gas outlet 76 communicated with the inner injection tube 73 and an outer outlet hole communicated with the outer injection tube. The mixed gas outlet hole 75, and the base 7 is also provided with an outer secondary air inlet hole 71, an outer ring air inlet hole 72 and a central air inlet hole 77 from the outside to the inside; correspondingly, the gas joint 3 has a The first air guide tube 32 connected to the inner injection tube and the second air guide tube 31 connected to the outer injection tube.

As shown in FIG. 4 , the air supplementary ring 6 is arranged on the upper end surface of the base 7, and sequentially includes an outer secondary air supplementary ring 61, an annular connection part 6a, an outer ring part 62, an inner connection part 6b and a central part from the outside to the inside. 63. Outer secondary air inlet ring 61 is provided with outer secondary air outlet hole 64, and ring connecting portion 6a is provided with outer air outlet hole 67, and outer ring portion 62 is provided with a first group of air outlet holes 65, and the inner connection The inner vent hole 6d is opened on the part 6b, and the second group of air outlet holes 66 is opened on the central part 63 .

The outer fire cover 5 is arranged on the annular connecting portion 6a and has a fire outlet 51 in the circumferential direction, the inner fire cover 4 is arranged on the inner connecting portion 6b, the inner side wall is provided with an inner ring fire outlet 42 and the outer side wall is provided with an outer ring fire outlet 41 The outer secondary air outlet holes 64 are arranged corresponding to the outer fire outlet holes 51, the first group of air outlet holes 65 are arranged corresponding to the outer ring fire outlet holes 41, and the second group of air outlet holes 66 are arranged corresponding to the inner ring fire outlet holes 42.

As shown in Figures 7 and 8, the outer fire hole 51 is arranged obliquely outward to form a trumpet shape, and the outer secondary air supplementary ring 61 is formed with a stopper 69 that can make the direction of the secondary air outlet out of the fire hole. The baffle is located at the air outlet end of the outer secondary air outlet 64, and the outer ring 62 and the central part 63 are also provided with a baffle 69, which can fully mix the gas and ensure that the overflow does not block the outer secondary air. The air outlet holes 64 , the first group of air outlet holes 65 and the second group of air outlet holes 66 .

When the burner is working, the fan 2 is working to introduce air into the casing 1, a part of the air is mixed with the gas as primary air and enters the outer injection pipe 74 and the inner injection pipe 73 respectively, and the other part of the air is divided into three channels as two The secondary air is supplemented and sent out from the outer secondary air outlet holes 64, the first group of air outlet holes 65, and the second group of air outlet holes 66 respectively, and the mixed gas entering the outer injection pipe 74 and the inner injection pipe 73 is sent from the outer injection pipe 74 and the inner injection pipe 73 respectively. The outer fire hole 51 of the fire cover 5 and the outer ring fire hole 41 and the inner ring fire hole 42 of the inner fire cover 4 send out, and finally form three rings of fire from the inside to the outside in the burner 10 to burn. The secondary air is drawn from the case 1, and the air in the case 1 is strongly sucked in by the fan 2, so the gas burns fully, and the air in the case 1 will be generated by the burner at this time The heat is preheated, and the heat generated by the burner 10 is recycled through the preheating of the air in the casing, which further improves the combustion efficiency of the gas while reducing heat radiation and heat convection.

When burning, the air is supplied from the fan below the burner, which is quite sufficient. A proportional valve is used to control the power of the cooker in use. The flow curve is smooth and the user experience is greatly improved; The primary air and secondary air are supplied by the fan according to the optimal ratio according to the nozzle flow rate. The primary air and secondary air required for combustion are all preheated; this can effectively improve the combustion efficiency (over 65%) ), reduce exhaust gas emissions (within 250ppm), thereby improving combustion efficiency and reducing exhaust gas emissions. In the combustion process, there is no need to supplement the air in the atmosphere as secondary air, which can greatly reduce the height of the pot support, and make the development and application prospects of the embedded gas stove more broad.

As shown in FIG. 9 and FIG. 10 , the control output end of the controller 101 is respectively connected with the control input end of the fan 2 and the control input end of the proportional valve 8 . The controller 101 is provided with a preset list of the opening and closing degree of the proportional valve 8 and the speed of the fan 2 corresponding to different firepower levels. The controller 101 can query the preset table when the external operation unit 102 inputs the required firepower level. form, and output control signals to the proportional valve 8 and the fan 2 respectively according to the query results, and control the proportional valve 8 so that the opening and closing degree of the proportional valve 8 is equal to the opening and closing degree of the proportional valve 8 corresponding to the firepower level. Close degree, control the fan 2 so that the speed of the fan 2 is the speed of the fan 2 corresponding to the firepower level, the opening and closing degree of the proportional valve is used to control the unit flow rate of the gas, and the fan speed is used to control the air flow rate. The amount of replenishment is achieved by controlling the fan speed and the opening and closing of the proportional valve to achieve the optimal ratio of the two, so that the gas combustion is more complete. The parameters of the preset form—the firepower level and the opening and closing degree of the proportional valve 8 corresponding to the firepower level and the speed of the fan 2 are optimally matched and set according to the specific properties of the gas stove.

In this embodiment, the firepower level can be freely adjusted between the maximum power and the minimum power of the gas stove, so users only need to easily slide on the touch screen 102 with their hands, and according to the displayed numbers, they can easily find the firepower they need. The firepower level, and then the controller will control the opening and closing of the proportional valve 8 and the speed of the fan 2, so that the gas stove can fully burn the gas at any firepower level.

In addition, in this embodiment, the rotational speed of the fan 2 can also be fed back to the controller 101 in real time. When the fire hole is blocked, or the power supply voltage changes, and the speed of the blower 2 fed back to the controller 101 is not equal to the speed of the blower 2 corresponding to the fire power level, the controller 101 will repeatedly output control signals to the blower. 2. Control the fan 2 so that the rotation speed of the fan 2 continuously approaches the rotation speed of the fan 2 corresponding to the firepower level until reaching the speed of the fan 2 corresponding to the firepower level.

In this embodiment, the flame detection unit corresponds to the fire outlet. When the igniter of the gas stove is ignited, the flame detection unit detects whether there is a flame. If there is, the igniter stops working. If there is no flame, the controller 101 drives the igniter again. Ignite 3 times, if the flame detection unit has not detected the flame signal, the controller 101 will alarm the abnormal flame alarm signal through the alarm, and the controller 101 will output a control signal to close the proportional valve 8 and the fan 2, And output a control signal to close the electromagnetic valve of the gas cooker.

In addition, the active air intake gas cooker in this embodiment also includes a temperature relay 106 for overheating protection of the detected gas cooker. The temperature relay 106 is also connected to the controller 101. When the controller 101 detects that the temperature relay When an abnormal action occurs, an overheating fault alarm signal is sent through the alarm, and the controller 101 outputs a control signal to close the proportional valve 8 and the fan 2, and outputs a control signal to close the solenoid valve of the gas stove.

In addition, when the gas cooker is in the working state, if the controller 101 cannot detect the feedback speed of the fan 2 within the preset time, it will judge that the fan is abnormal, and send an alarm to the fan abnormal signal through the alarm, and the controller 101 outputs a control The signal closes the proportional valve 8 and the solenoid valve 105 .

When the gas cooker is in the working state and receives the work timing signal input by the external operation part 102, the controller 101 will remind the timer expiration through the alarm 30 seconds to 60 seconds before the expiration of the work timing time. After the timer expires, the controller 101 outputs a control signal to close the proportional valve 8 and the fan 2, and outputs a control signal to close the solenoid valve of the gas stove.

Claims (7)

1. the control method of an active air intake gas-cooker, described active air intake gas-cooker comprises burner (10), blower fan (2) and Gas Pipe (9), this burner (10) lower end has induction tunnel, upper end has multiple fire output holes, aforesaid blower fan (2) is for initiatively filling into air to burner (10), the corresponding aforesaid induction tunnel setting of aforesaid Gas Pipe (9) also can provide combustion gas, it is characterized in that: described active air intake gas-cooker also comprises controller (101) and is controlled by the proportioning valve (8) of aforementioned controller (101), this proportioning valve (8) is located in Gas Pipe (9), the upper end of described burner (10) also has multiple auxiliary air ventholes of arranging near aforementioned fire output hole, the outlet side of described blower fan (2) communicates with air inlet port and the aforementioned auxiliary air venthole of induction tunnel respectively, and, described blower fan (2) is controlled by aforesaid controller (101), the operating portion (102) that aforesaid controller (101) has or is connected with, in controller (101), be provided with the opening degree of proportioning valve (8) corresponding in different firepower grade situations and the default list of the rotating speed of blower fan (2), controller (101) can be in the time of the firepower grade that outside operating portion (102) input needs, inquire about this default list, and export respectively control signal to described proportioning valve (8) and described blower fan (2) according to Query Result, control opening degree that described proportioning valve (8) makes described proportioning valve (8) and be the opening degree of the proportioning valve (8) corresponding with this firepower grade, control rotating speed that described blower fan (2) makes described blower fan (2) and be the rotating speed of the blower fan (2) corresponding with this firepower grade.

2. the control method of active air intake gas-cooker according to claim 1, is characterized in that: described peripheral operation portion (102) is touch display screen, described firepower grade free adjustment between gas-cooker peak power and minimum power.

3. the control method of active air intake gas-cooker according to claim 1, it is characterized in that: described blower fan (2) is connected with described controller (101), and can give described controller (101) by the speed feedback of blower fan (2) in real time, in the time that gas-cooker is operated under a certain firepower grade under outside operating portion (102) input, along with the prolongation of working time, if the rotating speed that feeds back to the blower fan (2) of described controller (101) is not equal to the rotating speed of the blower fan corresponding with this firepower grade (2), controller (101) is constantly exported control signal repeatedly to described blower fan (2), control the rotating speed that rotating speed that described blower fan (2) makes described blower fan (2) constantly approaches the blower fan corresponding with this firepower grade (2), until reach the rotating speed of the corresponding blower fan of this firepower grade (2).

4. the control method of active air intake gas-cooker according to claim 3, it is characterized in that: described active air intake gas-cooker also comprises the igniter being connected with described controller (101), flame detection unit, alarm and magnetic valve, flame detection unit is corresponding with described fire output hole, when after the igniter igniting of gas-cooker, detect whether there is flame by flame detection unit, if any, igniter quits work, as nothing, controller (101) again drive point firearm is lighted a fire 1～3 time, if flame detection unit can't detect flare up fire always, described controller (101) is reported to the police flame abnormal alarm signal by alarm, same Time Controller (101) output control signal is closed described proportioning valve (8) and described blower fan (2), and export control signal and close the magnetic valve of gas-cooker.

5. the control method of active air intake gas-cooker according to claim 4, it is characterized in that: described active air intake gas-cooker also comprises the temperature relay for carrying out overtemperature protection to detecting gas-cooker, this temperature relay is connected with described controller (101), in the time that controller (101) detects temperature relay abnormal operation, overheating fault alarm signal is reported to the police by alarm, same Time Controller (101) output control signal is closed described proportioning valve (8) and described blower fan (2), and export control signal and close the magnetic valve of gas-cooker.

6. the control method of active air intake gas-cooker according to claim 4, it is characterized in that: in the time that gas-cooker is in duty, when controller (101) can't detect the rotating speed of blower fan (2) feedback in Preset Time, judge that blower fan is abnormal, and blower fan abnormal signal is reported to the police by alarm, same to Time Controller (101) output control signal is closed described proportioning valve (8) and magnetic valve.

7. the control method of active air intake gas-cooker according to claim 4, it is characterized in that: when gas-cooker is in duty, and receive after the work timing signal of peripheral operation portion (102) input, controller (101) carries out the timing prompting that expires by described alarm in 30 seconds～60 seconds before the work timing time expires, when the work timing time is to after date, controller (101) output control signal is closed described proportioning valve (8) and described blower fan (2), and exports control signal and close the magnetic valve of gas-cooker.

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