How to choose a gas stove2007-02-03 09:531. Choose different types of gas stoves according to the overall design and use requirements of the kitchen. At present, there are mainly two types of gas stoves in our country: desktop and built-in gas stoves. Desktop stoves are a kind of stove with the entire stove body placed on the supporting surface. The advantage of tabletop stoves is the igniter. The igniter with strong ignition and crisp sound can ensure the success rate of ignition and service life of the stove. In addition, the burners and flame distributors of desktop stoves also need to be carefully selected. Anti-rust treated burners and forged copper flame distributors can ensure combustion efficiency and long service life; embedded is to embed the main body of the stove Under the supporting surface, it can make the kitchen look more beautiful, simple, bright, high-end, easy to clean, and in line with the aesthetics of modern home decoration. Secondly, there are ultra-thin gas stoves and gas stoves with ovens or sterilization types.

2. Select according to the local gas source. Gas is roughly divided into three categories: liquefied petroleum gas (bottled gas Y), artificial coal gas (pipeline gas R), and natural gas (pipeline gas T). The heating bodies and gas pressures of these three types of gases are different. If the type of stove does not match the gas, Danger will occur. Before choosing a stove, be sure to identify the type of gas.

3. Select the material. Usually the stove cover is made of forged copper. Currently, the main materials for gas stove panels are stainless steel, tempered glass, and Teflon-coated steel plates. Stainless steel is a strong material with good smoothness, high strength, good molding, acid and alkali resistance, corrosion resistance, and durability. However, the surface gloss will be poor after long-term use, and stains on stainless steel stove panels are difficult to clean. Including color steel, titanium panels, etc., if they are often touched by hands, it is easy to leave marks on them. If the time is short, you can wipe them off with water, but if the time is long or the sweat stains are heavy, just use a soft cloth and It will be difficult to wipe off the water. At this time, you need to use alcohol or foam glue to clean it. When selecting, the thicker the stainless steel, the better. The panel material must not be tinplate. According to the requirements, the thickness of the stainless steel plate used for the stove panel must not be less than 0.4mm. Most of the stove panels currently sold on the market are 0.4mm thick, with some reaching 0.5mm, while some low-priced and inferior stove panels are only 0.3mm thick. Thin stainless steel tends to receive uneven heat and dissipate heat unevenly, which may cause the stove top to crack from certain angles around the stove.

Tempered glass looks noble, elegant and beautiful. It is to cut ordinary glass into a certain size, polish the edges smooth, and then heat it in a high-temperature electric furnace. When the glass is heated to a temperature that is about to soften, it is immediately sent to a blowing equipment, blowing air evenly on both sides, and allowing it to cool suddenly to become tempered glass, so tempered glass is also called quenched glass. Tempered glass is not unbreakable glass, but it is much stronger than ordinary glass. Once tempered glass is broken, it does not have sharp edges like ordinary glass fragments, which can easily injure people. Tempered glass is more beautiful and resistant to corrosion and wear. If you buy glass, beware of inferior fiberglass, improper installation and use, and heat. Unevenness can lead to bursting. This type of tempered glass gas stove has serious quality and safety problems, and this type of product has been slowly phased out. Steel plate Teflon is a layer of Teflon coating added to the stainless steel panel, which is non-stick to oil, not easy to rust, and easy to clean.

4. Identify product quality by observing the product packaging and appearance. Under normal circumstances, high-quality gas stove products have strong outer packaging materials, complete accessories such as instructions and certificates, and clear printing content. The side panel of the stove should have a nameplate. The nameplate should be marked with the factory name, factory address, model, selected gas and pressure, heat flow and Production date etc. The overall structure of the product is stable and heavy, and the plate is thick. The burner head and fire cover should be well processed, and the corners should be smooth and without burrs. The stove should be beautiful and elegant. Press the handle of the countertop with your hand and there will be no obvious warpage. Hold the two opposite corners of the stove with your hand and twist it back and forth. There will be no obvious deformation of the stove. The components must be installed firmly and cannot be loose. Any product with a brand-name product trademark but no factory name or address must be a fake. If there is no test report issued by the gas management department, or the test report does not match the product nameplate identification, it must be an inferior product.

5. According to the air inlet and oxygen supply methods, it can be divided into three types: ordinary air inlet (lower air inlet), upper air inlet, and full air inlet. It is classified according to the way it solves the secondary air required for combustion. (1) Bottom air intake type: my country's traditional stoves are in line with the Chinese people's cooking habits of vigorous stir-frying and the need for low-heat pots. Most of the parents' homes use this type, so the heat load of the stove is large. The flame adjustment range is large.

This kind of foreign product requires opening holes in the cabinet, or relying on larger cabinet gaps to supplement the secondary air required for combustion. However, domestic users rarely know how to open holes in the cabinet or increase the air circulation in the cabinet. Insufficient secondary air will cause insufficient combustion, which will easily produce yellow flames and increase the carbon monoxide content in the flames. If used, opening and closing the cabinet door all at once may cause backfire, causing the local temperature of the glass panel to rise suddenly, easily causing the glass panel to burst. Inappropriate or inappropriate. (2) Top air intake type: This kind of stove is copied from the imported stove. The secondary air required for combustion enters the burner from the gap between the stove head and the liquid tray. Although it overcomes the shortcomings of the bottom air intake stove , but during combustion, a high-temperature zone has been formed in this part, and the cold air expands and rises when heated. Some of the air assists the flame, and the other part cannot enter the burner head. Therefore, the secondary air still cannot be effectively replenished, and the fundamental problem cannot be solved. Problems with yellow flames and high carbon monoxide content. The heat load of the stove designed with this structure cannot be too large (generally no more than 3.06KW/H), and the thermal efficiency is low, which does not meet the Chinese people's needs for strong and small fires, and the high burner head makes the stove The aesthetics are greatly reduced, but there is less chance of the glass panel exploding. Not enough. (3) Full air inlet type: This kind of stove not only has an air inlet on the chassis, but also an air inlet between the burner head and the liquid tray. This not only provides sufficient primary air and the necessary energy for combustion. The secondary air solves the problem of yellow flames, greatly reduces the carbon monoxide content, and avoids backfire caused by suddenly opening and closing the cabinet door, thus reducing the probability of the glass panel bursting. Since this type of stove adopts the characteristics of top-inlet and bottom-inlet stoves, it not only maintains the advantages of high heat load and wide flame adjustment range, which is in line with Chinese people's cooking habits, but also greatly reduces the friction between the stove and the glass panel. temperature, effectively preventing the glass panel from bursting.

6. Depending on the type of burner, it can be divided into European style and ordinary style. The European style is suitable for pans, the stove is made of alloy, and the air intake method is different from the Chinese style. The main appearance is the one with a pot rack on top, and the material is stainless steel. The ordinary type is more suitable for large woks.

7. Choose from the combustion method: Nowadays, gas stoves are divided into direct fire combustion and rotating fire combustion according to the burner. Generally, rotating fire has higher combustion thermal efficiency and more concentrated firepower, which is suitable for stir-frying. However, as the heat load increases, the smoke of the rotating fire is easy to exceed the standard, while the combustion power of the direct fire is more uniform, and the smoke is generally not easy to exceed the standard.

8. Ignition mode and flame combustion state: Ignition mode is divided into two types: piezoelectric ceramic ignition and electric pulse ignition. Electric pulse ignition energy comes from batteries, and piezoelectric ceramic energy comes from high-voltage electronics. Pulse ignition has a high hit rate and is easy to operate. It is generally equipped with a flameout protection device and has high safety. The product brochure says that the thermal efficiency is greater than 55%. When the electronic ignition switch is turned on, the sound is crisp and powerful, and the fire point is blue and clear. If the switch is soft and the sound is muffled when ignited, it is of poor quality. The service life of a qualified ignition switch is more than 6,000 consecutive times, and the air tightness of the cock is still qualified. The lifespan of inferior igniters is only 2,000 times. Qualified products must be ignited 10 times continuously, the number of ignitions must not be less than 8 times, and all fire holes must be spread within 4 seconds. The installation position of the switch knob, nozzle and ignition device of the gas stove must be accurate. When ventilating and igniting, the gas should be ignited every time. The flame should burn through all the fire holes within 4 seconds after ignition. The flame combustion state is an important reflection of the combustion quality of the stove. After igniting, adjust the damper to produce a clear, light blue flame. It must not produce incomplete combustion phenomena such as yellow flame, red flame, black smoke, backfire, etc. These phenomena directly affect the thermal efficiency of the stove and the quality of the smoke. When using a gas stove, it often happens that it fails to ignite. Most stoves now use flameout protection devices. For stoves equipped with thermoelectric flameout protection devices, you must press the knob down for 3-5 seconds before letting go when igniting, otherwise the fire will extinguish immediately after it is ignited. After the stove has been used for a period of time, abnormal combustion or even backfire may occur. It is caused by the blockage of the burner flame port. In order to maintain normal use and good combustion status of the stove, the inner and outer fire covers and burners should be taken out regularly, and the dirt on the fire cover should be removed with brushes and steel needles (to clear the fire holes). Do not wash with water; use artificial gas. The stove cover should be checked frequently to avoid backfire due to blockage of the fire hole and damage to the stove.

9. The appropriate amount of heat is generally between 3.6 and 4.2. The greater the heat flow value designed for household gas stoves, the stronger the heating capacity, which is usually called a fierce fire. Generally, consumers are willing to choose high-fire stoves, but in fact, the size of the heat flow should be compatible with the cooking method and the stove. If you blindly pursue a large heat flow, it will greatly reduce the thermal efficiency of the stove, increase the exhaust gas emissions, and waste energy. .

10. The air tightness of the furnace. If the air tightness of the stove fails, it is a fatal flaw, which is the biggest hidden danger of accidents. The simple test method is as follows: connect the air source, close the knob, and brush the pipeline, valve body and interface with soap liquid until there is no gas leakage.

11. Safety device: The safety device is the flameout protection device. When the fire on the stove is extinguished by boiling water, the stove will automatically cut off the air source to avoid unpredictable dangers. There are two types of working principles: thermocouple and self-priming solenoid valve. Thermocouples are temperature sensing devices and their response is slow, while solenoid valves are sensitive but require 3V voltage and consume more power. When purchasing a stove, you should carefully study whether the ignition system is safe and reliable, whether the combustion system burns fully, whether the heat adjustment is flexible, and whether the carbon monoxide content in the exhaust gas is less than 0.05%. The flameout protection device of the embedded stove is the most advanced ion induction type today, which can operate at 0. It senses the presence and disappearance of heat within one second, and plays the role of automatically shutting off the gas due to accidental flameout, which not only saves energy but also reduces harmful gas emissions.

12. "Cohesive spiral flame" is a specially designed spiral fire hole that makes the flame spirally cohesive. Under the action of centripetal force, it rotates and burns around the bottom of the pot, greatly reducing heat energy loss and thus heating more efficiently. Uniform and more powerful firepower. The advantage is that it saves about 25% of energy. The design of the stove must be stable, otherwise you will be burned all over by your own pot when cooking. The main reason is that the stove is not designed well and the pot keeps slipping down.

13. Buy classic styles and mature products from big brands such as Vantage, Sacon, Fotile, Kelon, and Midea. There can be fewer hidden dangers in the quality of famous brands. Don't buy those off-brand stoves at will, so as to avoid malfunctions during use after purchase and nowhere to report for repairs, causing danger and losses