I have worked as a promoter for more than 8 years in 3 well-known domestic gas stove brands, and have been familiar with the development, technology, quality and service of domestic gas stove brands for more than 4 years. Now two friends and I have set up a company in Shenzhen, mainly making supermarket shopping carts, stacking racks and other materials. Interlaced like a mountain, you can understand the details of a line by doing it. Most of us are unfamiliar with home appliances, so when we buy them, we are often greatly influenced by promoters. However, promoters of various brands say that they are good, and it is difficult for consumers to tell who is good. So now I want to teach you how to choose a gas stove. Everybody post it for me.
1. Choose a desktop cooker or an embedded cooker?
At present, gas stoves are mainly divided into desktop and embedded types. Generally, the appearance of desktop furnace is not as good as that of embedded furnace, but the thermal efficiency of desktop furnace is generally higher than that of embedded furnace because of air intake and other reasons. However, with the increasing demand for kitchen environment, embedded cookers can also be used as desktop cookers, and more beautiful embedded gas stoves have gradually become the mainstream of the market, and the market share of desktop cookers is getting lower and lower. However, when installing the embedded cooker, the bottom shell must not be completely isolated from the outside air, and a hole of about 80CM2 must be made in the cabinet to avoid the gas accumulation concentration in the cabinet being too high due to sealing, which will lead to accidents.
2. Determine the gas source
Next, we need to determine the gas source of the stove. That is, choose a gas stove that burns natural gas (pipeline gas T), liquefied petroleum gas (bottled gas Y) or artificial gas (pipeline gas R). Different gas, pressure, heat and price are different, and the gas source of the same gas stove cannot be changed at will. You should decide which gas stove to burn according to your own needs or local conditions. Among them, the ranking of heat is: liquefied gas >; Natural gas >: artificial gas.
3. Panel materials
At present, there are three main materials for gas stove panels: stainless steel, ceramics and tempered glass. Stainless steel and tempered glass are the most common. Among them, aesthetics: tempered glass >; Ceramic > stainless steel; Durability: stainless steel > tempered glass = ceramics; Cleanliness: tempered glass > ceramics > stainless steel.
At present, the heat and cold resistance and impact resistance of tempered glass panel of gas stove are generally no problem, and the technology is very mature. Even if there are cracks occasionally, the chances are very, very small, and the cracked fragments will be connected together and it is not easy to hurt people. General brands will promise that tempered glass panels will crack within a certain period of time and be replaced for free. The impact resistance of ceramic panels is slightly worse than that of tempered glass, but the temperature resistance is slightly stronger.
Stainless steel panel is the earliest and most widely used, but if the material is not good, or the panel and the bottom shell are not buckled well, it is easy to warp after a long time, especially if it is thin. Therefore, when choosing a gas stove with stainless steel panel, it will be more durable to choose a thicker button between the panel and the bottom shell. In short, the panels made of three materials have different lengths. It's up to you to choose your face, figure and housekeeping. Personally, I prefer tempered glass.
4. Air intake mode
Gas combustion needs oxygen in the air, and air intake is actually oxygen intake. The air intake modes of gas stoves are divided into upper air intake and lower air intake, and some manufacturers also call the lower air intake total air intake.
(1) against the wind: that is, the air needed for combustion mainly comes from the upper part of the gas stove. As shown in the figure, the middle of the fire cover is closed downwards.
(2) Downward air intake: that is, the air required for combustion mainly comes from the lower side of the cooker (the bottom shell of this cooker has air intake holes and dampers to adjust the air size). As shown in the figure, the middle of the fire cover opens downwards.
At present, the cookers seen on the market all have upper and lower air inlets. Among them, the downdraft gas stove needs to adjust the air door, which has a small hidden danger of tempering and deflagration for a long time, but the impact will not be too great. Therefore, at present, many manufacturers are referring to a pure upward-suction cooker from abroad and developing their own complete upward-suction cooker, because upward-suction cooker is regarded as the safest cooker in the industry, but relying solely on upward-suction cooker often leads to insufficient air supply, relatively small firepower, and unsatisfactory thermal efficiency and CO. Just like some brands have only 3.5KW firepower, it is this reason that affects normal use. However, I heard that some manufacturers have developed a completely up-sucking cooker, and its firepower, thermal efficiency and CO indicators are all good. You can get to know it.
5. Fire cover
The fire cover is one of the core components of the gas stove, and the material and hole design of the fire cover are very important.
At present, the material of gas stove cover in China is mostly copper alloy, but there are two kinds of copper alloys. One is brass for cabinets with a copper content of about 53%, which is used by most domestic enterprises and some cottage factories. The other is lead-cast non-standard brass with copper content of 57%. This kind of copper alloy is tens of dollars more expensive than the brass in the cupboard, so its quality is better. Domestic brands like some professional cookers use this lead to cast non-standard brass alloys. As for what brass it is, it is invisible to the naked eye. It is impossible for a non-professional to know this.
There are many holes in the fire cover. But there are mainly round holes, trapezoid, rectangle, strip and so on. The round hole is the first generation of fire cover, which has a long history. It's very common and easy to block. It is often necessary to remove impurities in the fire hole with toothpicks and needles to avoid burning the fire cover. Trapezoids are relatively rare. Generally speaking, strip-shaped fire holes have higher thermal efficiency and power than other fire holes, and are more suitable for China people's cooking habits such as frying, exploding and choking.
6. Combustion mode
Gas stoves can be divided into direct fire combustion, side fire combustion and rotary fire combustion according to the flame direction of fire.
Direct fire combustion is very common, that is, the air outlet is upward, and the flame is from bottom to top, perpendicular to the bottom of the pot.
The fire cover for side fire combustion is mainly a circular fire hole, and the air outlet hole is not above the fire cover, but around the fire cover and obliquely upward toward the bottom of the pot.
The fire cover of rotating fire is mainly a strip fire hole. Because the gas output is appropriate, it is fully mixed with air, and the blue part with the highest flame temperature basically faces the bottom of the pot. This combustion method has the highest thermal efficiency and concentrated firepower, and is more suitable for Chinese dishes such as cooking.
7. Ignition mode
The ignition methods of gas stoves are mainly divided into piezoelectric ceramic ignition and electric pulse ignition.
Piezoelectric ceramic ignition is mainly used in some old-fashioned table gas stoves, but now better gas stoves no longer use this ignition method. Piezoelectric ceramics is a special material. When it is subjected to pressure or deformation, its surface will be charged, and electric sparks will be generated when it is discharged from its surface. However, this ignition method can only spray an electric spark once by pressing the button, so the success rate of ignition is much lower than that of electric pulse ignition, which is more troublesome.
The electric pulse ignition method needs to install a battery at the bottom of the gas stove, and its ignition success rate is extremely high, generally 100%. Because it only needs you to twist the button once, and it can continuously spray an electric spark until it is ignited.
Compared with the two ignition methods, the electric pulse ignition method will be better.
8. flameout protection device
The flameout protection device is a device that automatically turns off the gas source to ensure your safety when the gas stove accidentally flameout (such as boiling water overflows during cooking), which is mainly divided into thermoelectric and ion induction devices. Now the country mandates that gas stoves must have flameout protection, so you must never buy one without flameout protection. Of course, as long as you don't go to a small market, you can't buy one without flameout protection. )
Thermoelectric type: it is the principle that the electromagnetic valve is opened and closed by sensing the temperature with thermocouple and generating thermoelectric potential. This flameout protection device is a set of thermocouple and solenoid valve, which only controls one gas channel, so the safety factor is high: that is, if one of them is damaged, it will not affect the normal use of the other burner, which is stable and reliable, and generally does not need an external power supply. However, it has a certain thermal inertia, so that the current output by the thermocouple can not disappear immediately with the flame extinguishing, and the response to accidental flameout is slow. It usually takes about 5- 10s to close the gas valve, but this leakage will not cause any safety problems. At present, most brands of cookers choose this way, among which the flameout protection device produced by Spain's 0KALI company is the most stable.
Ion induction: the flame invented mainly by using the principle of unilateral conduction has electric ions (the flame is equivalent to a section of wire). The advantage of this method is that it is quick to die. But it can only be applied to a single gas path, and the gas paths after passing through the protection device cannot be separated, otherwise it will cause misoperation and air leakage; So the flameout protection device is damaged, and the whole cooker can't be used. Secondly, it needs an external power supply and consumes a lot of power. Generally, the battery needs to be replaced once every 2-3 months.
9. Panel fixing method (embedded)
At present, the panel of most gas stoves is fixed by two burners, and the panel is easy to shift. Because of the weight of its own panel, glass or ceramics can easily get stuck in the gas valve stem once it is displaced, and cannot be ignited. However, due to its flexibility, stainless steel panels often warp and deform, so when choosing a cooker, we must choose a good fixing method. As far as I know, at present, only "Fire King" is used for multi-position positioning in the market. In addition to the fixed positions of the two burners, it is also fixed to the valve stem (that is, the rod under the knob) and the four sides of the stainless steel panel. The patent of "Fire King" completely solved the hidden dangers of displacement and warping.
Another trick to teach you is to weigh the corner of its gas stove with your finger (stainless steel panel only), and then press one of the burners hard with your other hand. If the panel is found to be warped, the fixing method is not good.