CN206488277U - A kind of burner of energy saving gas burner - Google Patents

Abstract

The utility model provides a combustion device for an energy-saving gas range, which belongs to the field of kitchen equipment. The combustion device of the energy-saving gas stove includes a stove head, a gas system, a heat storage device, a ventilation device, a turbine supply and exhaust device, and a control device; the heat storage device is located under the stove head, and the gas system is located at the The top of the heat storage device, the ventilation device is connected to the bottom of the heat storage device, the turbine supply and exhaust device is located below the ventilation device; the control device controls the gas system, the ventilation device and the turbine Supply and exhaust device.

Description

Combustion device for an energy-saving gas stove

technical field

The utility model belongs to the field of kitchen equipment, and in particular relates to a combustion device for an energy-saving gas stove.

Background technique

With the development of the economy and the improvement of people's living standards and the rapid development of the catering service industry, the number of Chinese gas cooking stoves used for cooking has increased sharply. The high noise level results in very low energy efficiency, as can be seen from local and national standards. Zhejiang DB33/T777-2010 "Environmental Protection Requirements and Energy Efficiency Rating for Commercial Gas Stoves" stipulates: Chinese food cooking stoves, level 1 energy efficiency>50% (heat load<32kw),>35% (32kw<heat load<45kw),> 32% (heat load > 45kw); large gas cooker for cooking, energy efficiency > 58% for level 1, > 50% for level 2, > 45% for level 3. GB30351-2014 "Commercial Gas Stove Energy Efficiency Limits and Energy Efficiency Grades" stipulates that cooking stoves: level 1 energy efficiency > 45%, level 2 > 35%, level 3 > 25%; large pot stoves: level 1 energy efficiency > 65%, Level 2 > 55%, Level 3 > 45%; Level 1 is the target value, which is an advanced and high-efficiency level; Level 2 is the product’s energy-saving evaluation value, which is an energy-saving product; Level 3 is the energy efficiency limit value of the product, which is the limit of market access. Minimum limit value. It can be seen that the energy efficiency of commercial gas stoves is generally low. How to maximize efficiency under the conditions of Chinese cooking has become a hot spot in the industry.

The most common product in the market is the blast swirl burner. Most technologies focus on how to mix gas and air to form a strong flame at the bottom of the pot, such as the Chinese patent 200410023147 gas stove burner for Chinese food, but most of the efficiency is <30%. , belongs to level 3 energy efficiency products. Chinese patent 201320407238.7 is a fully enclosed and heat-insulated Chinese cooking stove. It proposes a ring-shaped smoke exhaust chamber that can discharge smoke in time. It is fully enclosed, heat-insulated and environmentally friendly, but it fails to make full use of the heat of high-temperature smoke exhaust.

At present, the most efficient product is infrared flameless combustion combustion technology. The burner is divided into ceramic honeycomb board and metal fiber, such as Chinese patent 201210282169.1 Chinese cooking stove non-metallic honeycomb burning board, Chinese patent 200620035573.9 combined Chinese cooking gas stove and large pot stove High-efficiency infrared burners, whose thermal efficiency can reach more than 40%, belong to 1st and 2nd-level energy efficiency products. However, the heat intensity of the area of the ceramic plate burner is low, which makes the head bulky and easy to break, resulting in deterioration of the combustion conditions. More importantly, more than 50% of its heat transfer is radiation heat exchange, causing part of the heat to scatter outside the operating space, and even cause local overheating and burns. Metal fiber burner is another more advanced burner, the main component is iron chromium aluminum, high cost, poor strength, easy to be corroded by salt water and energy problems. This type of burner tends to overflow soup or vegetables and sinter into charcoal. It is not easy to clean and block the fire hole, which may easily lead to uneven flame, tempering or defiring.

The biggest demand for cooking stoves and integrated stoves is high firepower and high-speed scouring flames to meet the requirements of Chinese cooking. This causes a large amount of high-temperature flue gas to be discharged, and the energy of high-quality natural gas cannot be fully utilized. It is necessary to develop a novel Chinese cooking stove which is highly efficient and low-pollution emission by making full use of natural gas energy.

Utility model content

The purpose of this utility model is to solve the problems existing in the above-mentioned prior art, provide an energy-saving gas stove combustion device and its use method, and realize the high-temperature air regenerative combustion of relatively closed, turbocharged air supply and exhaust, and thick-lean combustion , can maximize the use of gas energy, realize low-temperature smoke exhaust, reduce the emission of nitrogen oxides in the combustion flue gas, and achieve high efficiency and low pollution emissions of Chinese cooking stoves.

The utility model is achieved through the following technical solutions:

A combustion device for an energy-saving gas stove, including a stove head, a gas system, a heat storage device, a ventilation device, a turbine supply and exhaust device, and a control device;

The heat storage device is located under the cooktop, the gas system is located on the top of the heat storage device, the ventilation device is connected to the bottom of the heat storage device, and the turbine supply and exhaust device is located on the below the ventilator;

The control device is connected to the gas system, the ventilation device and the turbine air supply and exhaust device.

The gas system includes a gas chamber, a solenoid valve connected in sequence, a flow regulator and a main line, and a branch line is connected to the main line;

The gas chamber is arranged on the top of the heat storage device, the gas chamber is provided with a light gas hole whose axis is parallel to the axis of the gas chamber, and the heat storage device is provided with a rich gas hole whose axis is parallel to the axis of the gas chamber The axis is vertical; the branch pipelines are respectively connected with each gas chamber.

The gas cavity is welded on the top of the heat storage device, or cast into one body with the heat storage device.

The heat storage device is a cylindrical structure, and a heat storage body is arranged in the inner cavity of the middle part. The opening of the heat storage device above the heat storage body is a high-temperature air nozzle or a high-temperature flue gas inlet. The heat storage body The opening of the lower heat storage device is the cold air inlet or the cold flue gas outlet. When the upper part is the cold air inlet, the lower part corresponds to the high-temperature air outlet. When the upper part is the cold flue gas outlet, the lower part corresponds to the high-temperature flue gas inlet;

An insulated casing is provided outside the heat storage device, and the heat storage devices are used in pairs.

The ventilation device includes a cavity and a sealing valve group, and the cavity is divided into two disconnected parts by a wall with a hexagonal cross section in it, and the part inside the wall is the flue gas box, the part outside the wall is the air box;

There are two sets of sealing valve groups in each air box and the flue gas box, and each group of sealing valve groups includes solenoid valves, shafts, sealing valves and air holes, and the air holes in the air box are connected to the air holes. The air box is connected, and the air holes in the smoke box are all connected with the smoke box;

On the horizontal plane, the cold air inlets are evenly distributed on the outer circumference, and the cold smoke outlets are evenly distributed on the inner circumference, the outer circumference is located outside the wall, and the inner circumference is located inside the wall;

The air boxes are respectively connected to the cold air inlets of the heat storage devices, and the flue gas boxes are respectively connected to the cold smoke outlets of the heat storage devices.

A stove and a pot are arranged above the stove, and a refractory pot ring is arranged on the entire side wall of the stove;

A support is provided below the stove, and the stove, pot, bracket and refractory pot ring form a furnace, and there is or no gap between the pot and the stove.

A temperature probe is arranged in the furnace.

The turbine supply and exhaust device includes a flue gas turbine, an air turbine and a motor, and the flue gas turbine and the air turbine share the motor;

The inlet of the flue gas turbine and the outlet of the air turbine are respectively communicated with the air box and the flue gas box;

The draft and pressure ratio formed by the flue gas turbine and the air turbine is 1:1 to 2:1.

The combustion device of the energy-saving gas stove further includes a protection device, which includes a flameout protection needle and an ignition needle arranged in the furnace.

The using method of above-mentioned combustion device comprises the following steps:

(1) The control device starts the motor, and the air turbine enters the cold air inlet of the heat storage device through the air box, and then enters the high-temperature air nozzle through the heat storage body to spray The control device controls the electromagnetic valve of the sealing valve group to open the air hole connecting the air turbine and the air box, and the air hole connecting the smoke turbine and the smoke box, and to open the air hole connecting the air turbine and the smoke box and connecting the smoke The air holes of the gas turbine and the air box are closed;

(2) The gas enters the gas chamber through the electromagnetic valve of the gas system, the flow regulator, and the branch pipeline, and finally sprays out from the light gas hole, and is connected with the high-temperature air jet. The air is mixed and ignited by the ignition pin;

(3) The flue gas enters the high-temperature flue gas inlet of the regenerator from the furnace, and after the flue gas heats the regenerator, enters the cold flue gas outlet and then enters the flue gas box, and passes through The flue gas turbine discharges;

(4) When the temperature probe detects that the furnace temperature exceeds 800°C, the control device controls the solenoid valve of the sealing valve group, and the control device controls the solenoid valve of the sealing valve group to connect the air turbine and the flue gas Open the air hole of the box, the air hole connecting the flue gas turbine and the air box, and close the air hole connecting the air turbine and the air box and the air hole connecting the flue gas turbine and the smoke box;

(5) When the fire ceases, the control device closes the electromagnetic valve of the gas system and the sealing valve group of the ventilation device.

The control device controls the switching time of the air hole within 10-60 seconds.

Compared with the prior art, the beneficial effect of the utility model is: no matter how the Chinese cooking stove operates, the exhaust gas temperature can be controlled below 150°C, greatly reducing the heat loss of the exhaust gas and reducing heat pollution; , to realize thick and thin combustion in the furnace, not only to achieve stable combustion, but also to achieve low nitrogen emissions, nitrogen oxide emissions can be lower than 100mg/m3; at the same time, a relatively closed furnace space is used to realize a small amount of smoke leakage to the space above the stove, improving the Operate the thermal environment and atmosphere; make full use of the single motor to drive the twin turbines, utilize the energy discharged by the flue gas, reduce the power consumption of the motor, and at the same time realize the combustion of the furnace with a slight positive pressure or a slight negative pressure, and realize the internal circulation of the high-temperature flue gas in the furnace , which promotes the convective heat transfer of the flue gas to the bottom of the pot. In a word, the utility model improves the thermal efficiency of the Chinese cooking stove and reduces the emission of pollutants.

Description of drawings

Fig. 1 is the structural representation of the utility model limited embodiment

Fig. 2-1 is the front view of the ventilation device of the present utility model

Figure 2-2 is a top view of the ventilation device of the present utility model

Fig. 2-3 is the schematic diagram after switching of the ventilation device of the present utility model

Fig. 3 is a combination diagram of the rich-lean gas burner of the present invention.

detailed description

Below in conjunction with accompanying drawing, the utility model is described in further detail:

The utility model is an energy-saving gas stove combustion device and its use method: the combustion air enters the regenerator after being turbocharged, is heated by the heat stored in the regenerator, and then burns after being mixed with the gas ejected from the gas nozzle. The flue gas is sprayed directly at the bottom of the pot, and the flue gas flushing the bottom of the pot is forcibly sucked out by the flue gas side of the turbocharger, and the honeycomb regenerator in the flue gas channel is heated and then discharged. The two groups of nozzles alternately spray high-temperature air and discharge high-temperature flue gas to realize the micro-positive pressure space in the relatively closed furnace composed of the bottom of the pot and the burner, and realize the process of stabilizing the gas and strongly washing the bottom of the pot.

Referring to Fig. 1-Fig. 3, the device of the present invention includes a cooker 1, a gas system 2, a protection device 3, a heat storage device 4, a ventilation device 5, a turbine supply and exhaust device 6, and a control device 7. The heat storage device 4 Located below the stove 1, the gas system 2 is located on the top of the heat storage device 4, the ventilation device 5 is connected to the bottom of the heat storage device 4, and the turbine air supply and exhaust device 6 is located on the Ventilation device 5 below.

A stove 11 and a pot 14 are arranged above the stove 1, a refractory pot ring 12 is arranged on the side of the stove 1, a support 15 is arranged below the stove 1, and the stove 1, the pot 14, the bracket 15 and the refractory pot ring 12 form a relatively closed There is a gap 17 between the furnace 13, the pot 14 and the stove 11, and the gap 17 can be a little gap or no gap. A temperature probe 16 is arranged in the furnace 13 to detect the temperature in the furnace 13.

Described gas system 2 comprises solenoid valve 21, flow regulator 27, main pipeline 22, branch pipeline 23, gas cavity 24 (gas cavity is welded on the top of heat storage device, or is cast into one with heat storage device, from function The gas system and heat storage device are decomposed into two parts), the light gas hole 25 and the rich gas hole 26, the light gas hole 25 is located on the gas chamber 24, and the light gas hole 25 sprays to the Furnace 13, the rich gas hole 26 is located on the heat storage device 4, the rich gas hole 26 is arranged horizontally, the gas chamber 24 is located on the top side of the heat storage device 4, and the branch lines 23 are respectively connected to Each gas cavity 24 is connected.

The protection device 3 includes a flameout protection needle 31 and an ignition needle 32 .

As shown in Figure 3, the heat storage device 4 includes a heat storage body 41, the heat storage body 41 is located in the middle of the heat storage device 4, and above the heat storage body 41 is a high-temperature air nozzle 42 or a high-temperature flue gas inlet 43 (For a single regenerator, a certain period of time is the air outlet, a certain period of time is the flue gas inlet, and it is cycled according to a certain period of time, so the cold air inlet or cold flue gas outlet under the corresponding regenerator is corresponding, when it is When the high-temperature flue gas is imported, the lower part is the cold flue gas outlet, and when it is a high-temperature air outlet, the lower part is the cold air inlet. That is the reason for using in pairs, when using in pairs, the flue gas is discharged once and the air is discharged back), the storage Below the heating body 41 is a cold air inlet 44 (when corresponding to a high-temperature air outlet) or a cold smoke outlet 45 (when corresponding to a high-temperature flue gas inlet 43), and the outer side of the heat storage body 41 is a thermal insulation shell 46. 4 Use in pairs.

As shown in Figure 2-1 and Figure 2-2, the ventilation device 5 includes an air box 51, a smoke box 52 and a sealing valve group 53, the air box 51 is located outside the smoke box 52, the There are two sets of sealing valve groups 53 in the air box 51 and the flue gas box 52 respectively, and the two groups of sealing valve groups 53 are in the open and closed states respectively. , a sealing valve 533 and an air hole 534, the air hole 534 includes an air hole 5341, an air hole 5342, an air hole 5343, and an air hole 5344, the air holes 5341 and 5342 are connected to the air box 51, and the air holes 5343 and 5344 are connected to the smoke The gas tank 52 is connected. The air boxes 51 are respectively connected to the cold air inlets 44 of some of the heat storage bodies 4 , and the smoke boxes 52 are respectively connected to the cold smoke gas outlets 45 of the heat storage bodies 4 . As shown in Figure 2-2, the air box 51 is a cavity outside the dotted hexagon, and the smoke box 52 is a cavity inside the dotted hexagon, and Figure 2-3 shows the flow direction after switching.

The turbine supply and exhaust device 6 includes a flue gas turbine 61, an air turbine 62 and a motor 63, the flue gas turbine 61 and the air turbine 62 share the motor 63, and the flue gas turbine 61 and the air turbine 62 form a The pump and pressure ratio is 1:1 to 2:1.

The utility model also discloses an energy-saving commercial gas cooking stove combustion operation method, comprising the following steps

(1) First, the control device 7 starts the motor 63, and the air turbine 62 enters the air 64 through the air box 51 into the cold air inlet 44 of the heat storage device 4, and then passes through the heat storage Body 41 enters the high-temperature air nozzle 42 and sprays out; the control device 7 supplies or cuts power to the solenoid valve 531, opens the air holes 5341, 5343 and closes the air holes 5342 and 5344

(2) The gas 28 enters the gas cavity 24 through the electromagnetic valve 21, the flow regulator 27, and the branch line 23, and finally is ejected from the light gas hole 25, and is connected with the high temperature The air 64 ejected from the air nozzle 42 is mixed and ignited by the ignition needle 32 .

(3) The flue gas 65 enters the high-temperature flue gas inlet 43 of the regenerator 4 from the furnace 13, and after the flue gas 65 heats the regenerator 41, enters the cold flue gas outlet 45 Enter the flue gas box 52 again, and discharge through the flue gas turbine 61;

(4) When the temperature probe 16 detects that the furnace temperature exceeds 800° C., the control device 7 supplies or cuts power to the solenoid valve 531, opens the air holes 5342 and 5344 and closes the air holes 5341 and 5343, The control device 7 controls the switching time of the air hole 534 to be within 10-60 seconds

(5) When the fire is stopped, the control device 7 closes the gas solenoid valve 21 and the sealing valve 533 .

The above-mentioned technical scheme is only an embodiment of the utility model. For those skilled in the art, on the basis of the application method and principle disclosed in the utility model, it is easy to make various types of improvements or deformations, and It is not limited to the methods described in the above specific embodiments of the present invention, so the above described methods are only preferred and not limiting.

Claims (8)

1. A combustion device of an energy-saving gas stove, characterized in that: the combustion device of the energy-saving gas stove includes a stove head, a gas system, a heat storage device, a ventilation device, a turbine supply and exhaust device, and a control device; The heat storage device is located under the cooktop, the gas system is located on the top of the heat storage device, the ventilation device is connected to the bottom of the heat storage device, and the turbine supply and exhaust device is located on the below the ventilator; The control device is connected to the gas system, the ventilation device and the turbine air supply and exhaust device. 2. The combustion device of an energy-saving gas stove according to claim 1, characterized in that: the gas system includes a gas chamber, a solenoid valve connected in sequence, a flow regulator and a main line, and a branch line is connected to the main line ; The gas chamber is arranged on the top of the heat storage device, the gas chamber is provided with a light gas hole whose axis is parallel to the axis of the gas chamber, and the heat storage device is provided with a rich gas hole whose axis is parallel to the axis of the gas chamber The axis is vertical; the branch pipelines are respectively connected with each gas chamber. 3. The combustion device of an energy-saving gas stove according to claim 2, wherein the gas chamber is welded on the top of the heat storage device, or cast integrally with the heat storage device. 4. The combustion device of an energy-saving gas stove according to claim 3, characterized in that: the heat storage device is a cylindrical structure, and a heat storage body is arranged in the inner cavity of the middle, and above the heat storage body The opening of the thermal storage device is a high-temperature air nozzle or a high-temperature flue gas inlet, and the opening of the thermal storage device below the heat storage body is a cold air inlet or a cold flue gas outlet; An insulated casing is provided outside the heat storage device, and the heat storage devices are used in pairs. 5. The combustion device of an energy-saving gas stove according to claim 4, wherein the ventilation device includes a cavity and a sealing valve group, and the cavity is surrounded by a wall with a hexagonal cross-section. The body is divided into two disconnected parts, the part inside the wall is the smoke box, and the part outside the wall is the air box; There are two sets of sealing valve groups in each air box and the flue gas box, and each group of sealing valve groups includes solenoid valves, shafts, sealing valves and air holes, and the air holes in the air box are connected to the air holes. The air box is connected, and the air holes in the smoke box are all connected with the smoke box; On the horizontal plane, the cold air inlets are evenly distributed on the outer circumference, and the cold smoke outlets are evenly distributed on the inner circumference, the outer circumference is located outside the wall, and the inner circumference is located inside the wall; The air boxes are respectively connected to the cold air inlets of the heat storage devices, and the flue gas boxes are respectively connected to the cold smoke outlets of the heat storage devices. 6. The combustion device of an energy-saving gas stove according to claim 5, wherein a stove and a pot are arranged above the stove head, and a refractory pot ring is arranged on the entire side wall of the stove head; A bracket is provided under the stove, and the stove, pot, bracket and refractory pot circle form a furnace, and there is or no gap between the pot and the stove; A temperature probe is arranged in the furnace. 7. The combustion device of an energy-saving gas stove according to claim 6, characterized in that: the turbine supply and exhaust device includes a smoke turbine, an air turbine and a motor, and the smoke turbine and the air turbine share all motor; The inlet of the flue gas turbine and the outlet of the air turbine are respectively communicated with the air box and the flue gas box; The draft and pressure ratio formed by the flue gas turbine and the air turbine is 1:1 to 2:1. 8. The combustion device of an energy-saving gas stove according to claim 7, characterized in that: the combustion device of the energy-saving gas stove further comprises a protection device, which includes a flameout protection pin and an ignition pin arranged in the furnace.