CN201074846Y - Gas and air mixing internal-burning type kitchen range - Google Patents

Abstract

The utility model relates to a gas cooking stove, in particular relates to an internal-burning type cooking stove, a knob rotating shaft and a cam are fixedly connected and synchronously rotated, a micro switch is fixed on a shell, an air inlet passage is connected with an outlet of an air inlet valve and an air inlet of an furnace body, a cremating head is fixed on the furnace body, a gas inlet tube is connected with an ignition device general bearing, an gas pipeline is connected with the outlet of a gas valve and the air inlet passage, a burning chamber is a mixing gas burning space which is encircled by an furnace body inner wall and the lower surface of a cover plate, an inlet of an air discharging valve is communicated with the burning chamber, the conical surface of an air discharging valve core is matched with the conical surface which is on the upper inlet portion of an air discharging valve body, and the air inlet valve, the furnace body and the air discharging valve are fixed with the shell through a supporting plate. Since the utility model adopts a double-layer hollow structure, a furnace body inner cavity is formed, heat conduction, convection, and radiation loss can be lowered, and additionally the hollow cavity can be used to keep water warm for drinking or bathing.

Description

Gas and air mixed internal combustion cooker

Technical field:

The utility model relates to a gas cooker, in particular to a gas and air mixed internal combustion cooker.

Background technique:

At present, almost every household in the city is ventilated (natural gas), and even in the countryside, every household uses coal gas or biogas, and the gas stove can be a must-have stove for household. Traditional gas stoves are all open combustion, and its most fundamental feature is that natural gas, coal gas, liquefied petroleum gas or biogas are mixed with air and then ignited, and burn under the condition of less than or equal to the ambient atmospheric pressure. The fuel ratio is low, the excess air coefficient is less than 1, the gas combustion is insufficient, and the thermal efficiency is low, below 60%. The existing gas stove air volume regulating mechanism is often not simple and reliable enough, and as the fire distributor is blocked, the flame is uneven and unstable. When the gas is biogas, the smell produced by combustion is unbearable. The phenomenon that the food in the pot boils out to extinguish the flame sometimes occurs, and the gas continues to go out, which is likely to cause poisoning or explosion danger.

The structure and function of existing internal combustion stoves have various structural forms, such as: [1] Yin Fasheng. Internal combustion gas stove. ZL0221078.X, 2002-3-19; [2] Wang Zhanyi. Closed gas stove. ZL93243708.7 , 1995-7-5; [3] Liang Fuquan. Internal Combustion Multifunctional Cooker. 200510117651.X, 2006-7-12; 8-11. The common shortcoming of these prior art is: flame burns under the gas cooker panel, and the waste gas of combustion directly discharges outdoors, can pollute the indoor and outdoor air. Although the patent [3] is provided with a heat exchanger, which utilizes the waste heat of the waste gas to heat tap water, which has a certain energy-saving effect, it still has the outstanding shortcomings of heat energy loss and environmental pollution. To sum up, although the existing technology has certain energy-saving and environmental protection effects, it cannot realize the real internal combustion structure and function, and still has the most fundamental shortcoming of the traditional gas stove.

Invention content:

The purpose of the invention of the utility model is to overcome the shortcomings of the prior art, and seek to design and prepare a gas cooker that can mix gas and air and compress them in the cooker to form internal combustion combustion.

In order to achieve the purpose of the above invention and overcome the problem of low combustion thermal efficiency of gas mixture gas in traditional gas stoves under ambient atmospheric pressure, the utility model sucks and compresses air through a fan, mixes it with gas to form gas mixture gas, and fills it into a closed combustion chamber. Combustion under relatively high pressure, air-to-air ratio and excess air coefficient can truly realize the internal combustion of gas mixture. When the pressure of the gas and air mixture is greater than the set pressure of the exhaust valve, the gas mixture stops entering the combustion chamber, and the exhaust valve is opened at this time, and the fully combusted exhaust gas is exhausted through the exhaust valve and the exhaust pipeline. To the outside; the pressure in the combustion chamber drops, the exhaust valve is closed, and the gas and air mixture continue to be charged into the combustion chamber for combustion under the impetus of the fan; so repeated, the entire combustion process of the gas and air mixture is formed. The set pressure of the exhaust valve should be lower than the gas pressure generated by the fan.

When the utility model is realized, the rotating shaft of the knob is fixedly connected with the cam, and both rotate synchronously; the micro switch is fixed on the housing; when the cam is not rotating, the contact of the micro switch is in the recess of the cam, and the micro switch is off Open; after turning, the flange of the cam presses down the contact of the micro switch, and the micro switch closes; the micro switch controls the power on and off of the fan, turns off the power of the fan when it is off, and turns on the power of the fan when it is closed; The cam and the connecting rod are hinged by a pin, and the connecting rod and the handle of the intake valve are hinged by a pin. When the cam rotates, it drives the handle of the intake valve to rotate to control the opening of the intake valve. When the cam is not rotating, the intake valve is closed and the cam rotates. When the intake valve reaches the limit position, the intake valve is fully opened, and the opening of the intake valve determines the amount of air entering the combustion chamber; the intake pipe connects the outlet of the intake valve and the air inlet of the furnace body, and is the passage for air to enter the furnace body , connected with the intake valve through threads, connected with the furnace body through flanges, or connected in other ways; the rotation angle of the knob controls the opening of the gas valve inside the igniter assembly. When the gas valve is not turned, the gas valve is closed and no gas enters the intake air When the pipeline is turned to the maximum angle, the opening of the gas valve is the largest, and the amount of gas entering the intake pipe is the largest; the rotation of the knob will cause the piezoelectric ceramic or ignition coil inside the igniter assembly to generate a higher voltage; the lead wire of the ignition switch is connected The igniter assembly and the spark head, the high-voltage electrical signal can be transmitted from the igniter assembly to the spark head through the lead wire of the ignition switch; the cremation head is fixed on the furnace body with screws through its upper flange, or by interference fit or other The way is fixed; the knob rotates the cremation head once to generate an electric spark. The gas inlet pipe is connected to the igniter assembly with screws through the flange at its end, and the gas can be delivered to the inlet of the gas valve inside the igniter assembly; the gas pipeline is connected to the outlet of the gas valve and the intake pipe, and the gas can pass through The gas pipeline enters the intake pipe and mixes with air to form a combustible mixture; the burner is fixed on the furnace body with screws through its end flange, and its inner cavity communicates with the intake channel of the furnace body, and the burner is on a radial pipe. Made with fine fire holes, the radial tubes are evenly distributed under the cover and kept at a certain distance, so that the flame can effectively heat the cover, and food, cooking utensils, etc. can be placed on the cover; the burner has various shapes; The combustion chamber is the gas mixture combustion space surrounded by the inner wall of the furnace and the lower surface of the cover plate; the cover plate and the furnace body are connected by screws, and a sealing gasket is made in the middle to play a sealing role; the exhaust valve and the furnace body are connected by bolts through the flange Connection, or connection by welding, threaded connection, etc.; the inlet of the exhaust valve communicates with the combustion chamber, and the conical surface of the exhaust valve core cooperates with the conical surface at the inlet of the exhaust valve body, which plays a role when the exhaust valve is closed. Good sealing effect; one end of the spring is on the exhaust valve core, and the other end is on the adjustment screw, and its compression determines the opening pressure of the exhaust valve, which directly controls the pressure of the combustion mixture in the combustion chamber; the exhaust valve core, The axes of the spring and the adjusting screw coincide, the adjusting screw adjusts the compression of the spring, and the adjusting screw and the exhaust valve body are connected by threads; the intake valve, the furnace body and the exhaust valve are fixed together with the shell through supports such as support plates; The exhaust pipe is connected to the outside through the pipeline. The furnace body is a double-layer hollow structure, and the inner and outer walls form the inner cavity of the furnace; the shell supports and protects the main part, and its upper panel should be lower than the cover plate to avoid interference when cooking utensils slide on the cover plate.

When the utility model is used and operated, the knob of the internal combustion stove is turned, and the contact or the roller of the micro switch is pressed by the cam on the rotating shaft to connect the power supply of the fan, and on the other hand, the intake valve and the igniter are opened through the connecting rod mechanism or other devices. The gas valve on the assembly, the fan inhales air and pressurizes it to deliver it to the air intake pipe, the gas is mixed with the air in the air intake pipe, and then sprayed into the combustion chamber through the fire hole of the burner; while the knob is turned, the igniter assembly A high-voltage electrical signal is generated, and through the lead wire of the ignition switch, an electric spark is generated at the spark head to ignite the combustible gas mixture. First, the cover plate on the furnace body is heated, and then the food or cooking stove on the cover plate is heated. The gas mixture is initially ignited by the spark head, and then burns by itself using the combustion heat. The larger the rotation angle of the knob, the larger the opening of the valve, the more gas mixture entering the furnace body, and the higher the power of the internal combustion stove.

The utility model can really realize the combustion of the mixed gas of gas and air in a closed space, under relatively high pressure, under the condition that the air-to-fuel ratio and the excess air coefficient are large, and the pressure of the combustion mixed gas is realized by fan pressurization, and the pressure is determined by Exhaust valve setting pressure control, furnace body adopts double-layer hollow structure, heat conduction, convection and radiation loss will be greatly reduced, gas combustion is more complete, exhaust gas is directly discharged outside, waste heat of exhaust gas can be used to heat the air in the intake pipe If necessary, the air and the cavity space in the furnace body can be used for drinking or bathing with warm water, which has obvious energy-saving and environmental protection effects, and is safe and reliable.

Compared with the prior art, the utility model adopts a double-layer hollow structure to form a furnace inner cavity, which can reduce heat conduction, convection and radiation loss on the one hand, and can also use the warm water in the cavity for drinking or drinking. For bath. The discharged waste gas can be used to heat the air in the air intake pipe to further improve the thermal efficiency of the internal combustion range, which reaches more than 80%. The internal combustion stove has obvious energy-saving and environmental protection effects, and is very suitable for kitchen use in modern families.

Description of drawings:

Fig. 1 is the principle schematic diagram of the main structure of the utility model.

Fig. 2 is a top view schematic diagram of the structural principle of the utility model.

Fig. 3 is a left schematic view of the structural principle of the utility model.

Detailed ways:

In the implementation of the utility model, the main structural parts of the internal combustion stove include knob 1, cam 2, igniter assembly 3, gas inlet pipe 4, ignition switch lead wire 5, spark head 6, screw 7, screw 8, sealing washer 9, furnace Body 10, burner 11, cover plate 12, bolt 13, exhaust valve 14, support plate 15, furnace inner cavity 16, combustion chamber 17, screw 18, shell 19, bolt 20, intake pipe 21, intake valve 22. Screw 23, micro switch 24, gas pipeline 25, screw 26, exhaust valve core 27, spring 28, adjustment screw 29, exhaust valve body 30, exhaust pipe 31, fan 32, pin 33, connecting rod 34, pin 35 and screw 36. The function and connection relationship of each component will be further described below in conjunction with the embodiments of the accompanying drawings.

When the utility model is implemented, the knob 1 is fixedly connected with the cam 2 through its rotating shaft, the knob 1 is turned, the cam 2 rotates synchronously, and the contact of the micro switch 24 is pressed down to connect the power supply of the fan 32, and the fan 32 starts to rotate Simultaneously, the handle of the intake valve 22 driven by the connecting rod 34 rotates to open the intake valve 22, and the handle of the connecting rod 34 and the intake valve 22 is connected by a pin 33, and the connecting rod 34 and the cam 2 are connected by a pin 35; The air in the air passes through the inlet valve 22 to the inlet pipe 21, and the inlet valve 22, the blower fan 32 and the inlet pipe 21 are shown as threaded connections in the figure, and can also be welded or flanged. The microswitch 24 is installed on the housing 19 by screws to ensure that the relative spatial position with the cam 2 is constant. When the knob 1 is turned, it opens the gas valve inside the igniter assembly 3 through its rotating shaft, and generates a higher voltage through the piezoelectric ceramic or ignition coil inside the igniter assembly 3, and the voltage is sent to the spark through the ignition switch lead wire 5 Head 6, and the electric spark is generated by the spark head 6, and the electric spark is generated once when the knob 1 is rotated; the rotation angle of the knob 1 is proportional to the opening of the gas valve, and directly controls the gas supply. Spark head 6 is fixed on the furnace body 10 with screw 7 by its flange. The gas inlet pipe 4 is connected to the igniter assembly 3 with screws 36 through the flange at its end, and the gas is delivered to the gas valve inside the igniter assembly 3. When the gas valve is opened, the gas enters through the gas pipeline 25 The intake pipe 21 is mixed with air to form a combustible mixture. The inlet pipe 21 is connected with the flange on the body of furnace 10 by bolts 20 through its end flange. The combustible mixture is sprayed into the combustion chamber 17 through the fire hole on the burner 11, ignited after encountering the spark generated by the spark head 6, and continues to burn by the heat generated by the combustion after the spark disappears. The burner 11 is connected to the furnace body 10 by screws 18 . The burner 11 has various shapes, one of which is shown. The combustion chamber 17 is a gas mixture combustion space surrounded by the inner wall of the furnace body 10 and the lower surface of the cover plate 12 . The combustible gas mixture burns in the combustion chamber 17 to heat the cover plate 12, and then heat the food on the cover plate, the cooking range and the like. The cover plate 12 is connected with the furnace body 10 by screws 8, and there is a sealing washer 9 in the middle, which acts as a seal. When the pressure of the combustion mixture in the combustion chamber 17 is higher than the set pressure of the exhaust valve 14 , the exhaust valve core 27 is pushed open to be discharged through the exhaust pipe 31 . The exhaust valve 14 is connected with the flange on the body of heater 10 with bolts 13 through the flange at its end. The exhaust valve 14 adjusts the compression amount of the spring 28 through the adjustment screw 29 , thereby adjusting the set pressure of the exhaust valve 14 , and the adjustment screw 29 and the exhaust valve body 30 are connected by threads. One end of the spring 28 is against the end face of the adjustment screw 29, and the other end is in contact with the exhaust valve core 27, so that the conical surface of the exhaust valve core 27 is in good contact with the conical surface on the air inlet of the exhaust valve body 30, ensuring that the exhaust valve 14 When closed, it has better sealing performance. The intake valve 22 , body of heater 10 and exhaust valve 14 are all fixed together with the housing 19 by supports such as a support plate 15 , and the support plate 15 is connected with the housing 19 by screws 26 .

When the utility model is installed, the exhaust pipe 31 should be connected to the outdoor through a pipeline, so as to prevent the exhaust gas from discharging from polluting the indoor environment. The waste gas discharged from the exhaust pipe 31 can be used to heat the air in the air pipe first, and then discharged to the outside to further improve the thermal efficiency of the internal combustion range.

The furnace body 10 of the present utility model is a double-layer hollow structure, and a furnace body cavity 16 is formed between the inner and outer walls. On the one hand, the conduction, convection and radiation loss of heat in the combustion chamber 17 can be reduced. On the other hand, the cavity can also be used to warm water. For drinking or bathing. The double dot dash line part in accompanying drawing 3 is the maximum rotation position of cam 2, connecting rod 34 and intake valve 22 handles.

Claims (2)

1. A gas and air mixed internal combustion cooker, characterized in that the rotary shaft of the knob is fixedly connected with the cam to rotate synchronously; the micro switch is fixed on the housing, the cam and the connecting rod are hinged by pins, and the connecting rod and the handle of the intake valve Hinged by pins, the intake pipe is connected to the outlet of the intake valve and the air inlet of the furnace body, connected to the intake valve through threads, and connected to the furnace body through flanges; the lead wire of the ignition switch is connected to the igniter assembly and the spark head, and the cremation The head is fixed on the furnace body with screws through its upper flange, the gas inlet pipe is connected with the igniter assembly with screws through the flange at its end, the gas pipeline is connected with the outlet of the gas valve and the intake pipe, and the burner is connected through its end flange. The upper flange is fixed on the furnace body with screws, and its inner cavity communicates with the air intake channel of the furnace body. The radial tube of the burner is made with fine fire holes. The combustion chamber is surrounded by the inner wall of the furnace body and the lower surface of the cover plate. The gas mixture combustion space; the cover plate and the furnace body are connected by screws, and a sealing gasket is made in the middle, the exhaust valve and the furnace body are connected by bolts through flanges, or connected by welding or threading, and the inlet of the exhaust valve is connected with the combustion chamber In the same way, the conical surface of the exhaust spool matches the conical surface at the inlet of the exhaust valve body, one end of the spring rests on the exhaust spool, and the other end rests on the adjusting screw, the axis of the exhaust spool, spring, and adjusting screw Coincidentally, the adjustment screw and the exhaust valve body are connected through threads; the intake valve, furnace body and exhaust valve are fixed together with the shell through the support plate; the exhaust pipe is connected to the outside through the pipeline. 2. The gas and air mixed internal combustion cooker according to claim 1, characterized in that the furnace body is a double-layer hollow structure, and the inner and outer walls of the furnace form a furnace cavity; the shell supports and protects the main body, and its upper panel is lower than the cover plate.

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