CN107340736B

CN107340736B - Control system of steam cabinet

Info

Publication number: CN107340736B
Application number: CN201710416919.2A
Authority: CN
Inventors: 左向涛
Original assignee: Shandong Dongfang Fangyuan Kitchen Equipment Co ltd
Current assignee: Shandong Dongfang Fangyuan Kitchen Equipment Co ltd
Priority date: 2017-06-06
Filing date: 2017-06-06
Publication date: 2020-04-14
Anticipated expiration: 2037-06-06
Also published as: CN107340736A

Abstract

The invention relates to the technical field of kitchen equipment, in particular to a control system of a steam cabinet. The control system of the steam cabinet comprises a power supply circuit, a single chip microcomputer control circuit, an electromagnetic valve driving circuit, a proportional valve driving circuit, an ignition driving circuit, a DC brushless direct current motor driving circuit, a temperature/gear/gate control detecting circuit, a flame detecting circuit, a water level detecting circuit and other auxiliary circuits, wherein a proportional valve connected with the proportional valve driving circuit in a driving mode is matched with a DC brushless direct current motor connected with the DC brushless direct current motor driving circuit in a driving mode to fully premix gas and air and then supply the premixed gas and air to a combustor. The invention has the advantages that: the steam pump accelerates the steam flow rate and the steam circulation, accelerates the steam flow rate, enables food to be steamed more quickly, enables the food to have better taste, and can also achieve the purpose of saving more energy.

Description

Control system of steam cabinet

Technical Field

The invention relates to the technical field of kitchen equipment, in particular to a control system of a steam cabinet.

Background

Evaporate the cabinet and have electric cabinet and gas to evaporate the cabinet, the gas evaporates the cabinet because using the gas, taste etc. more obtains liking of user, but the gas evaporates the cabinet, because guarantee the clean health of steam, the gas is safe in utilization, make structural design more complicated, and still consider the energy consumption scheduling problem, and reduce the human cost, can reach intelligent regulation, avoid because people are careless, cause equipment water shortage, the water shortage dry combustion method damages, the gas that flame extinguishes and cause leaks, the insufficient carbon monoxide that causes of burning exceeds standard and poisons the scheduling accident, there is very big potential safety hazard in the use, consequently, need accurate system control, it has the precautionary measure to ensure step safety, and can also control and adjust, the efficiency is improved, the energy consumption is reduced, and the benefit is increased.

Disclosure of Invention

In order to solve the technical problem that system control is needed due to human negligence, the invention provides a control system of a steam cabinet

The technical scheme of the invention is as follows:

a control system of a steam cabinet comprises a power circuit, a singlechip port control circuit, an electromagnetic valve drive circuit, a proportional valve drive circuit, an ignition drive circuit, a DC brushless direct current motor drive circuit, a steam pump drive circuit, a temperature/gear/gate control detection circuit, a flame detection circuit, a water level detection circuit, a steam pump drive circuit and a mode selection drive circuit, wherein the proportional valve connected with the proportional valve drive circuit is matched with the DC brushless direct current motor connected with the DC brushless direct current motor drive circuit in a driving way to fully premix gas and air and then supply the gas to a burner, the burner works, a water tank generates steam and outputs the steam to the steam cabinet, the steam releases heat to food through a steam pump and is accelerated, the mode selection drive circuit can select different modes to select one of a plurality of programs stored in the singlechip to adapt to different devices, the steam pump accelerates the steam flow rate to accelerate heat release of the steam to the food so as to steam the food in a shorter time, so that the food has better taste, the food can be steamed more quickly with less energy consumption, the temperature/gate control detection circuit automatically selects various firepower such as big, middle and small fire and the like according to signals sent by the temperature change/gate control switch and used by a plurality of doors, the temperature/gate control detection circuit can be used for various devices using the steam as a heat transmission medium, such as a gas steaming cabinet, an electric steaming cabinet and the like, and the electric steaming cabinet changes the number of heating pipes to change the power.

The power supply circuit comprises a power supply protection circuit, a power supply rectification filter circuit and a filter circuit, wherein the power supply circuit supplies power to the singlechip port control circuit, the electromagnetic valve drive circuit, the proportional valve drive circuit, the ignition drive circuit, the DC brushless direct current motor drive circuit, the temperature/gear/gate control detection circuit, the flame detection circuit, the water level detection circuit, the steam pump drive circuit, the mode selection drive circuit, the buzzer drive circuit, the multifunctional interface circuit, the serial port communication circuit, the display panel drive circuit, the software burning inlet, the debugging switch circuit and the ignition switch circuit.

The single chip microcomputer port control circuit analyzes various signals, controls the electromagnetic valve driving circuit, the proportional valve driving circuit, the ignition driving circuit, the DC brushless motor driving circuit and the steam pump driving circuit, and completes pre-operation detection, ignition control, automatic and manual adjustment of air-gas ratio in operation, shutdown detection and blower purging in operation.

The flame detection circuit adopts ion detection, and judges whether the flame exists or not by detecting the current of the induction needle, converting the current into a voltage form and converting the voltage form into a signal identified by the singlechip; judging the fire condition: the ionic current of the flame detection probe loop is more than or equal to 0.9 +/-0.2 uA; judging a fireless condition: the ion current of the flame detection probe loop is less than 0.5 uA; after the ignition switch is started, if a flame signal is detected before the electromagnetic valve is driven, the flame signal is taken as false fire fault treatment; in operation, if no fire is detected, the fire is treated as an accidental flameout; after fire is shut down, if fire is detected, the fire is taken as failure treatment of fire shut down.

The water level detection circuit adopts a resistance partial pressure detection method, the resistance of water and the water resistance partial pressure of the water level switch detection circuit are compared with a reference voltage, when the resistance of the water is less than 10k ohm, the comparison circuit outputs a high level, the singlechip port control circuit regards as water, when the resistance of the water is more than 10k ohm, the comparison circuit outputs a low level, the singlechip port control circuit regards as no water, and an alarm signal is output.

The electromagnetic valve driving circuit comprises an amplifying circuit and a relay which are connected, the relay is connected with the electromagnetic valve, the input end of the electromagnetic valve driving circuit is connected with the single-chip microcomputer port control circuit, and the single-chip microcomputer port control circuit controls the electromagnetic valve to be opened or closed through the electromagnetic valve driving circuit.

The proportional valve driving circuit comprises an operational amplifier and a triode, the output end of the proportional valve driving circuit is in driving connection with the proportional valve, the PV-PWM signal input end of the proportional valve driving circuit is connected with the single-chip microcomputer port control circuit and the PV-PWM signal output end of the single-chip microcomputer port control circuit, and the single-chip microcomputer port control circuit controls the opening of the proportional valve through the proportional valve driving circuit.

The direct current brushless motor driving circuit is connected with two groups of power supply voltages, a signal input end of the direct current brushless motor driving circuit is connected with a signal output end of a single chip microcomputer port control circuit, the single chip microcomputer port control circuit controls the rotating speed of the direct current brushless motor driving circuit through the direct current brushless motor driving circuit, the direct current brushless motor driving circuit further comprises a signal amplifier circuit, a signal isolation circuit, a signal feedback circuit and a controlled silicon, the signal feedback circuit feeds back rotating speed signals of the direct current brushless motor to the single chip microcomputer port control circuit, and the single chip microcomputer port control circuit feeds back wind speed adjusting signals and alarm signals of the direct current brushless motor according to the.

The ignition driving circuit comprises an amplifier and a relay and is connected with a port control circuit of the single chip microcomputer, and the ignition switch circuit is matched with the ignition driving circuit in a cooperative mode to ignite.

Steam pump drive circuit includes amplifier and relay, and steam pump drive circuit is connected with singlechip port control circuit, and machine work back, steam pump work, the steam pump is the steam velocity of flow with higher speed for steam is to the exothermal process of food, so that food evaporates in shorter time, just can reduce the consumption of the energy, reaches energy-conserving purpose, can be used to the gas evaporates the cabinet, and multiple such as electric steaming cabinet uses steam as the equipment of heat transmission medium.

The temperature/gear/gate control detection circuit is connected with the port control circuit of the single chip microcomputer, the port control circuit of the single chip microcomputer achieves the purpose of energy saving by manually converting large, medium and small fire according to a gear switch, the temperature/gate control detection circuit automatically selects the large, medium and small fire according to signals sent by a temperature change/gate control switch when a plurality of doors are used, the temperature/gate control detection circuit can be used for various devices which take steam as heat transmission media, such as a gas steaming cabinet, an electric steaming cabinet and the like, the power of the gas steaming cabinet is changed by changing the gas quantity supplied to a burner for burning, and the power of the electric steaming cabinet is changed by changing the number.

The intelligent water level controller also comprises a buzzer driving circuit, a power supply rectifying and filtering circuit, a filtering circuit multifunctional interface circuit, a serial port communication circuit, a display panel driving circuit, a software burning inlet, a debugging switch circuit and an ignition switch circuit, wherein the buzzer driving circuit, the flame detection circuit, the water level switch detection circuit, the temperature/gear/gating detection circuit, the multifunctional interface circuit, the serial port communication circuit, the display panel driving circuit, the software burning inlet, the debugging switch circuit and the ignition switch circuit are respectively connected with the singlechip port control circuit.

By using the technical scheme of the invention, a temperature/gear/gate control detection circuit, a water level detection circuit, a multifunctional interface circuit, a mode selection driving circuit, a steam pump for accelerating the steam flow rate and the steam circulation, a temperature/gear/gate control detection circuit for realizing manual or automatic gear change by a singlechip by using a temperature/gear/gate control detection signal, a water level detection circuit, a water level probe for detecting a water level signal, a detection signal is output to the singlechip through the water level detection circuit, the signal is output when no water exists, the machine enters a standby state by water, the multifunctional interface circuit can add new functions according to the actual use requirements, such as air pressure detection, gas type detection, infrared detection and the like, the mode selection driving circuit can adjust the immovable configuration according to unequal equipment to adapt to the use requirements of various devices, on the basis of accurate matching, the energy-saving and consumption-reducing device is energy-saving, beneficial to actual effect, low in noise, high in heat efficiency, excellent in performance, less in harmful substances in waste gas, safe, reliable, clean and sanitary, and capable of automatically converting large, medium and small fire by using temperature/door control, so that the same steam is more energy-saving; the steam pump accelerates the steam flow rate, so that the food is steamed more quickly, the food has better taste, and the aim of saving more energy can be fulfilled.

Drawings

FIG. 1 is a schematic diagram of the general circuit principle of the present invention;

FIGS. 2, 3, 4, 5, 6, 7 are partial circuit schematic diagrams of the present invention;

FIG. 8 is a functional block diagram of the circuit control of the present invention;

FIG. 9 is a functional block diagram of the control system of the present invention;

FIG. 10 is a schematic structural view of the present invention;

FIG. 13 is a schematic structural view of an explosive state of the present invention;

FIGS. 11, 12, 14, 15, 16, 17, 18, 19, 20 are schematic structural views of portions of the present invention;

FIGS. 21 and 22 are schematic views showing the structure of the water tank of the present invention;

FIG. 23 is a schematic view of the construction of the tank portion of the present invention;

FIGS. 24, 25 and 26 are schematic structural views of the case of the present invention;

FIGS. 27, 28 and 29 are schematic views of the fire grate of the present invention;

FIGS. 30 and 31 are schematic views of the structure of the fire row part of the invention;

FIG. 32 is a schematic structural view of the exploded state of the fire bank of the present invention;

FIG. 33 is a schematic view of the construction of the electrical box of the present invention;

fig. 34 is a schematic structural view of the cabinet door of the present invention.

Detailed Description

The invention is further illustrated by the following figures and examples.

Example 1

The control system of the steam cabinet shown in fig. 1, 2, 3, 4, 5, 6, 7, 8, 9 comprises a power circuit, a single chip port control circuit, an electromagnetic valve drive circuit, a proportional valve drive circuit, an ignition drive circuit, a DC brushless motor drive circuit, a steam pump drive circuit, a temperature/gear/gate control detection circuit, a flame detection circuit, a water level detection circuit, a steam pump drive circuit and a mode selection drive circuit, wherein the proportional valve connected with the proportional valve drive circuit is cooperated with the DC brushless motor connected with the DC brushless motor drive circuit to fully premix gas and air and supply gas to a burner, the burner works, a water tank generates steam and outputs the steam to the steam cabinet, the steam releases heat to food through a steam pump, the single chip port control circuit feeds back signals according to the rotating speed of the DC brushless motor, the rotating speed of the fan is adjusted, so that the combustor achieves the best gas and air ratio, the combustion is complete, the content of CO in the flue gas is low, the special design of the furnace end and the stretching effect of the fire tube on the flame enable the temperature of the flame to be dispersed, and the nitrogen oxide in the flue gas is less. The mode selection driving circuit can select different modes to select one of a plurality of programs stored in the singlechip, the mode selection driving circuit not only selects the temperature, the door control and the gear, but also selects the parameters for starting different air-air ratios, if the three-door steam cabinet has the parameters of the three-door steam cabinet and the two-door steam cabinet has the parameters of the two-door steam cabinet, the fluctuation is less, on the basis of accurate matching, the steam pump not only saves energy and is beneficial to the actual effect, the steam pump accelerates the steam flow rate to accelerate the heat release of the steam to the food so as to achieve the aim of steaming the food in a shorter time and leading the food to have better taste, the steam cabinet can steam food with less energy consumption and faster speed, can be used for various devices which take steam as heat transmission media, such as a gas steam cabinet, an electric steam cabinet and the like, and the electric steam cabinet changes the number of heating tubes to change power.

The power supply circuit comprises a power supply protection circuit, a power supply rectification filter circuit and a filter circuit, wherein the power supply supplies power to the singlechip port control circuit, the electromagnetic valve drive circuit, the proportional valve drive circuit, the ignition drive circuit, the DC brushless direct current motor drive circuit, the temperature/gear/gate control detection circuit, the flame detection circuit, the water level detection circuit, the steam pump drive circuit, the mode selection drive circuit, the buzzer drive circuit, the multifunctional interface circuit, the serial port communication circuit, the display panel drive circuit, the software burning inlet, the debugging switch circuit and the ignition switch circuit.

The water level detection circuit adopts a resistance voltage division detection method, the resistance of water and the resistance of the water level switch detection circuit divide voltage, the voltage is compared with reference voltage, when the resistance of the water is less than 10k ohm, the comparison circuit outputs high level, the singlechip port control circuit regards as water, when the resistance of the water is more than 10k ohm, the comparison circuit outputs low level, the singlechip port control circuit regards as no water, an alarm signal is output, and the water level switch detection circuit in a circuit diagram is also the water level detection circuit.

The DC brushless motor driving circuit is connected with two groups of power supply voltages, a signal input end of the DC brushless motor driving circuit is connected with a signal output end of the single chip microcomputer port control circuit, and the single chip microcomputer port control circuit controls the rotating speed of the single chip microcomputer port control circuit through the DC brushless motor driving circuit. The control circuit comprises a single chip microcomputer port control circuit, a signal amplifier circuit, a signal isolation circuit, a signal feedback circuit and a silicon controlled rectifier, wherein an output signal of the single chip microcomputer port control circuit is amplified through the signal amplifier and is transmitted to the silicon controlled rectifier through a photoelectric coupler, the voltage of the silicon controlled rectifier control circuit is high or low to control the rotating speed of the DC brushless direct current motor, the signal feedback circuit feeds back a rotating speed signal of the DC brushless direct current motor to the single chip microcomputer port control circuit, and the single chip microcomputer port control circuit feeds back a wind speed adjusting signal and an alarm signal of the DC brushless direct current motor according to the signal.

The temperature detection circuit is connected with a port control circuit of the single chip microcomputer, the resistance of the temperature probe changes along with the change of the temperature according to the change of the temperature, the detection circuits of the temperature detection circuit detect resistance signals, the single chip microcomputer automatically selects big fire, small fire and medium fire according to the signals, the temperature detection circuit can be used for various devices which take steam as heat transmission media, such as a gas steaming cabinet, an electric steaming cabinet and the like, the power of the gas steaming cabinet is changed by changing the gas quantity supplied to a burner for combustion, and the power of the electric steaming cabinet is changed by changing the quantity of heating tubes.

The intelligent control system is characterized by further comprising a buzzer driving circuit, a multifunctional interface circuit, a serial port communication circuit, a display panel driving circuit, a software burning inlet, a debugging switching circuit and an ignition switching circuit, wherein the buzzer driving circuit, the flame detection circuit, the water level detection circuit, the temperature/gear/gating detection circuit, the multifunctional interface circuit, the serial port communication circuit, the display panel driving circuit, the software burning inlet, the debugging switching circuit and the ignition switching circuit are respectively connected with a single chip microcomputer port control circuit.

1. Misfire- -misfire, pressing the ignition switch, no flame detected within a specified time, beeping

The device comprises: sounding for 1 minute, and a fan: running for 1 minute in strong wind, finishing alarming, and clearing faults: and pressing an ignition switch, clearing the fault, and ending the alarm, and simultaneously ending the operation of the fan for 1 minute in strong wind.

2. Accidental flameout failure- -accidental flameout, normal combustion, no flame detected for a certain time, buzzer

The device comprises: sounding for 1 minute, and a fan: and (3) running for 1 minute in strong wind, finishing alarming, and clearing faults: and pressing an ignition switch, clearing the fault, and ending the alarm, and simultaneously ending the operation of the fan for 1 minute in strong wind.

3. Overheat failure-during combustion or shutdown, an overheat signal is detected, the buzzer: sounding for 1 minute, and a fan: and (3) running for 1 minute in strong wind, finishing alarming, and clearing faults: and pressing an ignition switch, clearing the fault, and ending the alarm, and simultaneously ending the operation of the fan for 1 minute in strong wind.

4. Before the fan fails to ignite, the wind speed does not meet the requirement of the ignition wind speed, or when the fan burns normally, the wind with the corresponding gear position is used

Fast automatic adjustment fails, buzzer: continuous alarm, fan: no rotation, fault clearing: pressing an ignition key to clear faults, finishing alarming, and simultaneously, operating the fan for 1 minute in strong wind.

5. False fire fault-before ignition, a flame signal is detected, buzzer: continuous alarm, fan: at ignition wind speed

Continuing operation, clearing fault: pressing an ignition key to clear faults, finishing alarming, and simultaneously, operating the fan for 1 minute in strong wind.

6. Non-homing ignition, namely the gear switch is not ignited in a long open fire gear, and the buzzer: continuously sounding, and a fan: the fan does not rotate, and the fault is cleared: pressing an ignition key to clear faults, finishing alarming, and simultaneously, operating the fan for 1 minute in strong wind.

7. Failure to shut down the fire-after shutting down the fire, flame is still detected for a certain time, buzzer: continuously sounding, and a fan: and (3) continuously running in strong wind, and clearing faults: pressing an ignition key to clear faults, finishing alarming, and simultaneously, operating the fan for 1 minute in strong wind.

8. Water shortage warning- -before ignition or during normal combustion, no water is detected within a specified time, the buzzer: and (4) continuously alarming, the machine does not work, and the fault cannot be cleared until the fault is eliminated.

9. Temperature detection abnormity, namely the temperature detection abnormity occurs before ignition or in normal work, the buzzer continuously alarms, the machine does not work, and the fault cannot be cleared until the fault clearance detection circuit.

As shown in fig. 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 34, the control system is used in combination with a steam cabinet, the steam cabinet comprises a cabinet body, a water tank, a burner, an electrical box and a power supply structure, the upper portion of the cabinet body is provided with the storage cabinet, the lower portion of the cabinet body is provided with the water tank, the bottom of one side of the water tank is hollowed to form a combustion chamber, the lower portion of the combustion chamber is provided with the burner, the burner comprises a fire grate arranged at the bottom of the water tank, the water tank is provided with a DC brushless direct current fan 12 and a single speed fan 9, the DC brushless direct current fan 12 is a variable frequency fan, the electric energy is saved, the DC brushless direct current fan 12 discharges gas generated by combustion to a hollow pipe 81 of an upper steam pipe 2, an inner chamber is arranged above the water tank and is connected with a boiler connecting plate body 70, the inner chamber is communicated with an outer pipe 80 of, the steam outlet of the inner container is connected with the steam pump inlet, the steam pump outlet is connected with the air inlet of the upper body of the steam cabinet, namely the air inlet of the upper body of the steam cabinet, the steam pump outlet and the steam outlet of the water tank of the lower body of the steam cabinet form a tee joint, a main control computer board 38, a heat radiation fan 39, an igniter 13 and an electromagnetic valve A33 are arranged in the electric tank, the main control computer board 38 is provided with or connected with a water level controller, the heat radiation fan 39, the igniter 13 and the electromagnetic valve A33 are connected with the main control computer board 38, the igniter 13 is connected with a fire grate ignition needle, a temperature detection probe, a fire grate ignition needle and a water level detection probe 50 are connected with the main control computer board 38, the main control computer board 38 controls the gas flow of the electromagnetic valve A33 and the rotating speed of the DC brushless fan 12 to achieve the optimal gas and air ratio through temperature feedback of the temperature detection probe, the DC, it is reasonable to store up the cabinet and evaporate layer steam flow, practical efficiency improves 30%, when guaranteeing required steam volume, the gas volume that consumes is 30% less, water and steam system all adopt clean sanitary stainless steel to make, the combustion noise is less than 62dB, evaporate the special construction design of layer cabinet door, make gas leakage obtain control, adopt safe and reliable's electronic pulse autoignition, it is automatic to improve, flame-out protection, prevent that the gas from leaking and arousing the accident, ensure safety, the essential element sets up at front, facilitate the use and maintain, reducible lateral part headspace.

As shown in fig. 21, 22, 23, 24, 25, 26, the water tank comprises a tank body 40, the top of the tank body 40 is open, one side of the bottom is open, a water outlet is arranged on the bottom plate of the other side, a water outlet screw a41 is arranged on the water outlet, a ball valve is arranged on the water outlet screw a41 and connected with a water outlet rod 16, a water tank combustion chamber shell 42 is arranged in the opening side, a fire grate is arranged below the water tank combustion chamber shell 42, the top of the water tank combustion chamber shell 42 protrudes upwards to form a sharp angle shape, if the water tank combustion chamber shell 42 is in straight-face combustion, the deformation is easy, the service life is short, the sharp angle shape bodies are parallel and uniformly arranged, screw rods are arranged on the sharp angle bodies, the screw rods can absorb a part of heat to increase the thermal efficiency, the front and back sides of the water tank combustion chamber shell 42 are fixedly and hermetically connected with the tank body 40, a side plate 43 is arranged on the, a pipeline outlet 46 is arranged on the right side wall of the box body 40, an inner container piece 47 is arranged between the inner container piece mounting inlet and the inner container piece mounting outlet 44, the inner container piece 47 is vertical, parallel arrangement, the circulating line between inner bag piece 47 is the bending form, the centre is the M style of calligraphy, special water container structural design, heat transfer area is big, high heating efficiency, be equipped with pipeline 48 between pipeline inlet 45 and the pipeline outlet 46, the vertical setting in pipeline 48 both sides, equal area, it is in large quantities to set up, pipeline outlet 46 side outer wall is equipped with cavity A, pipeline inlet 45 side outer wall is equipped with cavity B, the box 40 lateral wall is equipped with water inlet A and water inlet B, water inlet A is equipped with outlet silk head B, water inlet B is equipped with outlet silk head C, pressure balance pipeline is equipped with between outlet silk head B and the auxiliary water tank, ensure the water level highly uniform, be equipped with the inlet tube between outlet silk head C and the auxiliary water tank. The water tank and the auxiliary water tank are arranged together, and the outside of the water tank and the auxiliary water tank are wrapped by wrapping materials to keep the temperature of water and steam in the water tank.

The outer wall of the cavity B is provided with an auxiliary water tank, the auxiliary water tank comprises an auxiliary water tank main body 49, a floating ball is arranged in the auxiliary water tank main body 49, the top of the auxiliary water tank main body 49 is provided with two water level detection probes 50, and the auxiliary water tank main body 49 is provided with a water feeding connection port 24. Water is filled from the auxiliary water tank, water enters the water feeding connection port 24, a floating ball is arranged in the water feeding connection port, water enters the auxiliary water tank all the time when the water level is lower than a preset water level, the floating ball switch is closed when the water level reaches the preset water level, the water level detection probe is controlled by the main control computer board 38, the water level is detected to be normal and can be operated, the water level is detected to be abnormal, and an alarm is given.

And the cavity A is provided with a DC brushless fan 12 and a single-speed fan 9.

As shown in fig. 27, 28, 29, 30, 31 and 32, the fire grate comprises a bracket, a plurality of groups of fire grates are used for heating, the fire power distribution is uniformly dispersed, the service life can be prolonged, the bracket is provided with the air inlet pipe 60, the combustion port piece 62, the fire row ignition needle and the fire row fire detection needle, the bracket comprises a sheet metal piece A59 and a sheet metal piece B61, the combustion port piece 62 is arranged between the sheet metal piece A59 and the sheet metal piece B61, the combustion port piece 62 is vertically and parallelly arranged, the air inlet pipe 60 is provided with a big fire air inlet 53 and an ever-burning fire air inlet 54, the big fire air inlet 53 is positioned in the middle of the air inlet pipe 60, the ever-burning fire air inlet 54 is positioned on one side of the air inlet pipe, a group of fire row ignition needles and fire row fire detection needles are arranged on the side wall support on the side, a group of fire row ignition needles and fire row fire detection needles are arranged on the support opposite to the long open fire air inlet 54, the group of fire row ignition needles and the fire row fire detection needles are two ignition needles 52 and one fire detection needle 51, and the length of the fire detection needle 51 is longer than that of the ignition needles 52. The burner is complete in combustion, the content of CO in flue gas is low, the special design of the burner and the stretching effect of the fire tube on flame enable the temperature of flame to be dispersed, and nitrogen oxides in the flue gas are less.

Sheet metal component A59 lower part leanin and inwards extending, form inclined plane and baffle, the inclined plane fretwork is equipped with bayonet socket A64 that is used for fixed burning mouth spare 62, open porosely on sheet metal component A59 upper portion, downthehole plate turns up the book inwards, sheet metal component A59 middle part is equipped with the mounting hole that is used for installing a set of ignition needle and fire detection needle from top to bottom, sheet metal component B61 upper portion turns up the book outwards and forms the backplate, sheet metal component B61 fretwork is equipped with bayonet socket B65 that is used for fixed burning mouth spare 62, bayonet socket B65 extends to the backplate edge, sheet metal component B61 lower part is equipped with the through-hole that corresponds with burning mouth spare 62 air inlet, the through-hole outside is equipped with intake pipe 60, be equipped with the intake pipe gas port on the intake pipe 60 and be connected with burning mouth spare 62 air inlet, establish the pipeline in burning mouth spare 62, burning.

The cabinet body comprises an upper cabinet body and a lower cabinet body, wherein the lower cabinet body comprises adjusting legs 7 and square tubes, four adjusting legs 7 are arranged, square tubes are arranged between the adjusting legs 7 for fixation, lower decorative plates 26 are clamped on the lateral adjusting legs 7, a hearth mounting plate is arranged between the square tubes at the front and rear lower parts, the upper cabinet body comprises an upper cabinet inner chamber and an upper cabinet inner frame, the upper cabinet inner chamber comprises an inner chamber bottom plate 71, the inner chamber bottom plate 71 is arranged above the outer frame bottom plate, a left inner chamber plate 73 is arranged on the left side of the inner chamber bottom plate 71, a right inner chamber plate 72 is arranged on the right side of the inner chamber bottom plate 71, a rear chamber inner plate is arranged on the rear side of the inner chamber bottom plate 71, inner chamber outer reinforcing plates 74 are vertically arranged on the front and rear sides of the outer walls of the left inner chamber plate 73 and the right inner chamber plate 72 for fixation, inner chamber bracket plates 75 are vertically arranged in the front and rear sides of the left inner chamber plate 73 and the right inner chamber plate 72, brackets 76 are arranged between, an inner middle top plate 79, an inner middle top plate 79 and other steaming layer top plates are arranged between the compartments and are in an inverted V shape, the generated water of steam is ensured to be left to two sides, cleanness and sanitation are achieved, the compartments are also ensured to be free of tainting odor between the layers, an inner chamber middle transverse plate 78 is arranged at the front part of the inner middle top plate 79, an outer top plate 1 is arranged at the top parts of a left inner chamber plate 73, a right inner chamber plate 72 and a rear inner chamber plate, an inner chamber upper transverse plate 15 is arranged at the front part of the outer top plate 1, an upper steam pipe 2 is arranged at the outer side of the right inner chamber plate 72, a hollow pipe 81 is arranged in the middle of the upper steam pipe 2, an inner chamber and boiler connecting plate body 70 is arranged in a hollow mode in the middle of an inner chamber bottom plate 71, the inner chamber and boiler connecting plate body 70 is connected with a water tank through a flange to ensure that the steam does not leak outwards, a water tank cover plate is arranged on the inner chamber and boiler connecting, the round pipe A82 is connected with an upper air elbow joint A83, the upper air elbow joint A83 is connected with an upper air elbow joint B85 through a soft connecting pipe 84, the upper air elbow joint B85 is communicated with an upper air pipe 2 through a round pipe B86, the upper part of the upper air pipe 2 is provided with a safety air release valve 3, pressure intensity is too high, pressure intensity is automatically released, the upper air pipe 2 and each layer of upper cabinet body are indirectly provided with a set of upper air structure, the upper air structure comprises an upper air corrugated pipe 87 and an outer double-thread pipe fitting 88, the upper air corrugated pipe 2 is connected with the upper air corrugated pipe 87, the upper air corrugated pipe 87 is connected with the upper air control pipe 89 through an upper air control pipe 89, the upper air control pipe 89 is connected with the outer double-thread pipe fitting 88, the outer double-thread pipe fitting 88 is communicated with a right inner chamber plate 72, the left rear side of the inner chamber bottom plate 71 is provided with an inner container drain pipe 27, the inner cabinet comprises an outer frame bottom plate 6, the outer frame bottom plate 6 is, a panel body 93 is arranged at the front end of the right side of an outer frame bottom plate 6, an upper steam control pipe 89 penetrates through the panel body 93 to be connected with a steam wave system 5 through a connecting rod 4, when the steam wave system 5 needs to be taken out of a storage cabinet, the air inlet of the upper steam control pipe 89 to the storage cabinet is stopped, too much hot air is avoided, the potential safety hazard is improved, a frame plate 96 is vertically arranged behind a steam water tank 28, an outer side sealing plate 92 is arranged between the frame plate 96 and a rear upright post 91, a frame 14 is arranged between the frame plate 96 and the panel body 93, a door buckle 94 is arranged in the upper part of the frame 14, an outer side sealing plate 92 is arranged between the rear upright post 91 and the panel body 93, a connecting plate 95 is arranged on the outer side sealing plate 92, an outer rear sealing plate 90 is arranged between the rear upright posts 91, the frame 14 and the outer rear sealing plate 90 are arranged in parallel, an inner chamber and a boiler connecting plate body 70 penetrate through the outer frame bottom plate 6 to be connected with a, the inner wall of the cabinet door 29 is provided with two sides with latch hooks 37, the inner wall of the door frame is provided with latch hook hanging plates 34 with inserted latch hooks, and the latch hook hanging plates 34 are provided with inserted mounting holes 35. The installation body 10 is equipped with at the back to the right side wall of back inner chamber board, is equipped with steam outlet in the installation body 10, and steam safety vent sets up rationally, and no steam leaks during normal operation, stores up the cabinet and is exactly that the inner bag is located, has each shrouding protection outward, avoids touching the scald, promotes factor of safety.

As shown in fig. 33, the electrical box is provided with a power switch 21 and an ignition switch 20, the lower part of the front surface of the cabinet body is provided with an operation panel, the operation panel is provided with an LCD display screen 23, a magnetic switch 22, a power change-over switch 19, an indicator light 18 and a standby ignition switch 17, the power switch 21 and the ignition switch 20 are exposed from the operation panel, the power switch 21, the ignition switch 20, the power change-over switch 19, the indicator light 18 and the standby ignition switch 17 are connected with the electrical box, and the magnetic switch 22 is used in a gear detection circuit and manually adjusted.

a. Before starting up, an indoor air draft system is started to ensure smooth indoor air circulation;

b. confirming that water supply and air supply are normal, and paying attention to the fact that the water level does not reach a specified position and the fire is not on fire;

c. determining that all switches are in a closed state, and turning on a main gas supply switch;

d. starting a main power switch, and pressing an ignition switch until the machine enters a long-time open fire standby state or outputs an alarm signal;

e. determining that the burning of the fire species is normal, and manually controlling large, medium and small fire by using a gear switch according to gears;

when the device is used, air is fed through the long open fire air inlet 54, so that the long open fire row keeps on fire, the air quantity of the big fire air inlet 53 is controlled, the combustion of big, medium and small fire is controlled, the gas generated by the combustion passes through the inner liner sheet of the combustion chamber, reaches the cavity B, then reaches the pipeline and the cavity A, is discharged through the DC direct current brushless fan 12 and then flows to the hollow pipe 81 of the upper steam pipe 2 for heat preservation, the steam generated in the water tank automatically enters the outer pipe 80 of the upper steam pipe 2 due to pressure and enters the steam layer through the steam feeding structure, the DC direct current brushless fan 12 determines the quantity of the air entering the combustion chamber, the proportional valve A33 determines the quantity of the gas entering the combustion chamber, and the combustion benefit is greatly improved through intelligent control to achieve the optimal state.

Example 2

The difference between this embodiment and embodiment 1 is a mode selection driving circuit, which has four toggle switches, and can be combined into multiple modes, and each mode can select different types of gear switches, manual or automatic modes, and different program settings, so as to be suitable for different devices.

Example 3

The difference between this embodiment and embodiment 1 is that the gate control detection circuit automatically selects a large fire, a small fire, a medium fire, and a medium fire according to signals sent by the gate control switch and used by several gates, and when the temperature is lower at the beginning and is at the maximum fire, the fire is controlled by the number of gates used after the temperature reaches a certain degree, and the specific parameters can be set by a program.

Example 4

The difference between the embodiment and the embodiment 1 is a temperature detection circuit, large, medium and small fires are automatically selected according to a temperature signal detected by the temperature detection circuit, when the temperature is lower, the large fire is combusted by the largest fire, when the temperature rises to reach a preset temperature, the large fire is automatically and slowly reduced from the large fire to the medium fire and then to the small fire, at this time, the temperature is reduced due to the lower temperature of food or the opening of a door of a steaming cabinet, when the temperature is reduced to a preset temperature, the small fire is automatically and slowly increased from the small fire to the large fire, and when the temperature is increased to reach the preset temperature, the small fire is automatically and slowly reduced by the large fire, and the circulation is carried out, so that the purposes of automatic conversion between the large fire and.

Example 5

The difference between this embodiment and embodiment 1 is that this system has a set of spare system in addition, the electrical apparatus case still includes controller 25 and the solenoid valve B32 of manual regulation flow, spare system includes controller 25, single-speed fan 9, solenoid valve B32 and wind pressure switch, the wind pressure switch sets up at the front portion of the lower cabinet body, DC brushless motor 12 and the single-speed fan 9 that DC brushless motor drive circuit drive is connected are installed in parallel, the air exit sets up the check valve of airing exhaust, solenoid valve A33 of main system communicates with spare system solenoid valve B32 through the tee bend and connects to the combustor, two sets of systems carry out the selection between spare system and the main system through power diverter switch 19, spare system has ignition and fire detection function equally, also has water level detection function, controller 25 has ignition, flame detection, water level detection, wind pressure detection, dry combustion detection and fan drive function, when using, the power switch is pressed down, the steps of detection before starting, purging, ignition, fire detection, normal operation and the like are automatically completed after the power switch is powered on, and the air quantity can only be adjusted through a manual electromagnetic valve B32.

Example 6

The difference between this embodiment and embodiment 1 is that this system still has the steam pump, and inner bag steam outlet connects the steam pump entry, and the steam pump export connects steam cabinet upper part of the body air inlet, and that is to say steam cabinet upper part of the body air inlet, steam pump export, steam cabinet lower part of the body water tank steam discharge mouth form the tee bend, and machine work back, the steam pump work, and the steam pump accelerates the steam velocity of flow for the exothermal process of steam to food, so that food evaporates in the shorter time and ripens.

It should be understood that the above-mentioned embodiments are merely preferred examples of the present invention, and not restrictive, but rather, all the changes, substitutions, alterations and modifications that come within the spirit and scope of the invention as described above may be made by those skilled in the art, and all the changes, substitutions, alterations and modifications that fall within the scope of the appended claims should be construed as being included in the present invention.

Claims

1. The control system of the steam cabinet comprises a power supply circuit, a singlechip port control circuit, an electromagnetic valve drive circuit, a proportional valve drive circuit, an ignition drive circuit, a DC brushless motor drive circuit, a temperature/gear/gate control detection circuit, a flame detection circuit, a water level detection circuit, a steam pump drive circuit, a mode selection drive circuit, a buzzer drive circuit, a multifunctional interface circuit, a serial port communication circuit, a display panel drive circuit, a software burning inlet, a debugging switch circuit and an ignition switch circuit; the buzzer driving circuit, the flame detection circuit, the water level detection circuit, the temperature/gear/door control detection circuit, the multifunctional interface circuit, the serial port communication circuit, the display panel driving circuit, the software burning inlet, the debugging switch circuit and the ignition switch circuit are respectively connected with the singlechip port control circuit;

the control system is used in combination with a steam cabinet, wherein the steam cabinet comprises a cabinet body, a water tank, a burner, an electric appliance box and a power supply structure;

the upper part of the cabinet body is provided with a storage cabinet, the lower part of the cabinet body is provided with the water tank, the bottom of one side of the water tank is hollowed to form a combustion chamber, the lower part of the combustion chamber is provided with the combustor, the combustor comprises a fire grate, and the fire grate is arranged at the bottom of the water tank;

the water tank comprises a tank body (40), the top of the tank body (40) is opened, one side of the bottom is opened, the bottom plate on the other side is provided with a water outlet, a water outlet screw head A (41) is installed on the water outlet screw head A (41), a ball valve is installed on the water outlet screw head A (41), the ball valve is connected with a water discharging rod (16), a water tank combustion chamber shell (42) is arranged in the opening side of the bottom, the fire grate is arranged below the water tank combustion chamber shell (42), the top of the water tank combustion chamber shell (42) protrudes upwards to form a pointed angle, the front side and the rear side of the water tank combustion chamber shell (42) are fixedly and hermetically connected with the tank body (40), a side plate (43) is arranged on the left side of the water tank combustion chamber shell (42), an inner container piece installation hole (44) and a pipeline inlet hole (45, a pipeline outlet (46) is formed in the right side wall of the box body (40), a liner sheet (47) is arranged between the liner sheet installation inlet and the liner sheet installation outlet (44), a pipeline (48) is arranged between the pipeline inlet (45) and the pipeline outlet (46), a cavity A is arranged on the outer wall of the pipeline outlet (46), a cavity B is arranged on the outer wall of the pipeline inlet (45), a water inlet A and a water inlet B are arranged on the side wall of the box body (40), a water outlet screw head B is arranged on the water inlet A, a water outlet screw head C is arranged on the water inlet B, a pressure balance pipeline is arranged between the water outlet screw head B and the auxiliary water tank, a water inlet pipe is arranged between the water outlet screw head C and the auxiliary water tank, the auxiliary water tank is arranged on the outer wall of the cavity B, the auxiliary water tank comprises an auxiliary water tank main body (49), and a floating ball is arranged in the auxiliary water tank main, the auxiliary water tank main part (49) top is equipped with two water level detection probe (50), be equipped with on auxiliary water tank main part (49) and connect mouth (24) to the water supply, be equipped with DC brushless direct current fan (12) and single speed fan (9) on the cavity A, DC brushless direct current fan (12) are the frequency conversion fan, the gas that DC brushless direct current fan (12) produced with the burning is discharged to hollow tube (81) of steam pipe (2), the water tank top is equipped with inner chamber and boiler connection plate body (70), inner chamber and boiler connection plate body (70) through the pipe fitting with outside pipe (80) intercommunication of steam pipe (2), the steam outlet of storing up the cabinet is equipped with temperature detection probe, steam outlet is steam safety gas vent, and inner chamber steam outlet connects the steam pump entry, and the steam pump export connects steam cabinet upper part air inlet, steam cabinet upper part air inlet, The outlet of the steam pump and the steam outlet of the steam box on the lower body of the steam cabinet form a tee joint;

the fire grate comprises a support, an air inlet pipe (60), a combustion port piece (62), a fire grate ignition needle and a fire grate fire detection needle are arranged on the support, the support comprises a sheet metal part A (59) and a sheet metal part B (61), the sheet metal part A (59) and the combustion port piece (62) are arranged between the sheet metal part B (61), the combustion port piece (62) is arranged vertically and parallelly, a big fire air inlet (53) and a long open fire air inlet (54) are arranged on the air inlet pipe (60), the big fire air inlet (53) is positioned in the middle of the air inlet pipe (60), the long open fire air inlet (54) is positioned on one side of the air inlet pipe (60), a set of the fire grate ignition needle and the fire grate fire detection needle is arranged on the side wall support opposite to the long open fire air inlet (54), another set of the fire grate ignition needle and the fire grate fire detection needle is arranged on, the ignition device comprises two ignition needles (52) and a fire detection needle (51), wherein the length of the fire detection needle (51) is longer than that of the ignition needles (52); the sheet metal component A (59) lower part leanin and inwards extend to form an inclined plane and a baffle, the inclined plane fretwork is equipped with bayonet A (64) used for fixing the burning mouth piece (62), the sheet metal component A (59) upper part is opened porosely, downthehole plate turns over to the enstrophe, sheet metal component A (59) middle part is equipped with the mounting hole that is used for installing a set of fire row ignition needle with the fire row flame detection needle from top to bottom, sheet metal component B (61) upper part turns over outwards and turns over and forms the backplate, sheet metal component B (61) fretwork is equipped with bayonet B (65) used for fixing the burning mouth piece (62), bayonet B (65) extend to the backplate edge, sheet metal component B (61) lower part be equipped with the through-hole that the air inlet of burning mouth piece (62) corresponds, the through-hole outside is equipped with intake pipe (60), be equipped with the intake pipe gas inlet on intake pipe (60) with burning mouth piece air inlet 62 is, a pipeline is arranged in the combustion opening piece (62), and a combustion opening is formed in the surface of the combustion opening piece (62);

a main control computer board (38), a cooling fan (39), an igniter (13) and a solenoid valve A (33) are arranged in the electrical box, the main control computer board (38) is provided with or connected with a water level controller, the cooling fan (39), the igniter (13) and the solenoid valve A (33) are connected with the main control computer board (38), the igniter (13) is connected with a fire grate ignition needle, the temperature detection probe, the fire grate ignition needle and the water level detection probe (50) are connected with the main control computer board (38), and temperature feedback is carried out through the temperature detection probe;

the proportional valve that proportional valve drive circuit drive is connected with DC brushless motor drive circuit drive connection's DC brushless motor cooperatees and gives after fully premixing gas and air the combustor air feed, the combustor work, the water tank produces steam output extremely evaporate the cabinet, and pass through the steam pump for steam is to food exothermic the acceleration.

2. The control system of the steam cabinet of claim 1, wherein: the power supply circuit comprises a power supply protection circuit, a power supply rectification filter circuit and a filter circuit, wherein the power supply circuit supplies power to the singlechip port control circuit, the electromagnetic valve drive circuit, the proportional valve drive circuit, the ignition drive circuit, the DC brushless motor drive circuit, the temperature/gear/gate control detection circuit, the flame detection circuit, the water level detection circuit, the steam pump drive circuit, the mode selection drive circuit, the buzzer drive circuit, the multifunctional interface circuit, the serial port communication circuit, the display panel drive circuit, the software burning inlet, the debugging switch circuit and the ignition switch circuit.

3. The control system of the steam cabinet of claim 1, wherein: the single chip microcomputer port control circuit analyzes various signals, controls the electromagnetic valve driving circuit, the proportional valve driving circuit, the ignition driving circuit, the DC brushless motor driving circuit and the steam pump driving circuit, and completes detection before operation, ignition control, automatic and manual adjustment of air-gas ratio in operation, shutdown detection and blower purging after operation;

the flame detection circuit adopts ion detection, and judges whether the flame exists or not by detecting the current of the induction needle, converting the current into a voltage form and converting the voltage form into a signal identified by the singlechip; judging the fire condition: the ionic current of the flame detection probe loop is more than or equal to 0.9 +/-0.2 uA; judging a fireless condition: the ion current of the flame detection probe loop is less than 0.5 uA; after the ignition switch is started, if a flame signal is detected before the electromagnetic valve is driven, the flame signal is taken as false fire fault treatment; in operation, if no fire is detected, the fire is treated as an accidental flameout; after fire is shut down, if fire is detected, the fire is taken as fire shut-down failure treatment;

the water level detection circuit adopts a resistance partial pressure detection method, the resistance of water and the resistance partial pressure of water of the water level switch detection circuit are compared with a reference voltage, when the resistance of the water is less than 10k omega, the comparison circuit outputs a high level, the singlechip port control circuit regards as water, when the resistance of the water is more than 10k omega, the comparison circuit outputs a low level, and the singlechip port control circuit regards as no water and outputs an alarm signal.

4. The control system of the steam cabinet of claim 1, wherein: the electromagnetic valve driving circuit comprises an amplifying circuit and a relay which are connected, the relay is connected with an electromagnetic valve, the input end of the electromagnetic valve driving circuit is connected with the single-chip microcomputer port control circuit, and the single-chip microcomputer port control circuit controls the electromagnetic valve to be opened or closed through the electromagnetic valve driving circuit.

5. The control system of the steam cabinet of claim 1, wherein: proportional valve drive circuit includes operational amplifier, triode, proportional valve drive circuit output drive connection proportional valve, proportional valve drive circuit PV-PWM signal input part is connected singlechip port control circuit is through PV-PWM signal output part, singlechip port control circuit warp proportional valve drive circuit control proportional valve aperture size.

6. The control system of the steam cabinet of claim 1, wherein: the DC brushless motor driving circuit is connected with two groups of power supply voltages, the signal input end of the DC brushless motor driving circuit is connected with the signal output end of the single chip microcomputer port control circuit, the single chip microcomputer port control circuit controls the rotating speed of the DC brushless motor driving circuit through the DC brushless motor driving circuit, the single chip microcomputer port control circuit further comprises a signal amplifier circuit, a signal isolation circuit, a signal feedback circuit and a silicon controlled rectifier, the signal feedback circuit feeds back the rotating speed signal of the DC brushless motor to the single chip microcomputer port control circuit, and the single chip microcomputer port control circuit feeds back the wind speed adjusting signal and the alarm signal of the DC brushless motor according to the signal.

7. The control system of the steam cabinet of claim 1, wherein: the ignition driving circuit comprises an amplifier and a relay and is connected with the port control circuit of the single chip microcomputer, and the ignition switch circuit is matched with the ignition driving circuit in a cooperative mode to ignite.

8. The control system of the steam cabinet of claim 1, wherein: the steam pump driving circuit comprises an amplifier and a relay, the steam pump driving circuit is connected with the port control circuit of the single chip microcomputer, after the machine works, the steam pump accelerates the steam flow velocity, and the heat release process of steam to food is accelerated.

9. The control system of the steam cabinet of claim 1, wherein: the temperature/gear/door control detection circuit is connected with the single chip microcomputer port control circuit, the single chip microcomputer port control circuit achieves the purpose of saving energy by manually switching large, medium and small fires according to the gear switch, and the temperature/door control detection circuit automatically selects the large, medium and small fires according to signals sent by the temperature change/door control switch when a plurality of doors are used.