Key Points For Purchase Of Pressure Cooker

You should go to a reputable shopping mall to buy new models and new pressure cookers of well-known brands; If the parts of the pressure cooker are damaged, they should be repaired or replaced by a regular manufacturer; Read the instructions carefully before use; During the use of the pressure cooker, the five parts of "cover, hole, valve, ring and sheet" shall be well maintained, and the pressure cooker that has been used for more than 8 years shall not be reused even if no fault is found. The biggest difference between pressure cooker and other cookers is the word "high pressure". Because of its airtight and high-pressure characteristics, it is easy to ripen, rot and save time when processing food, and the loss of nutrition and flavor is relatively small. However, as we all know, it is very dangerous to heat water in a closed container. Since steam cannot leak out, the pressure in the container will be very high, which is very easy to cause container explosion. In order to prevent the pressure in the pressure cooker from being too high, the pressure cooker is equipped with a "pressure reducing valve", so that when the pressure in the pressure cooker exceeds the specified limit, it can leak out from this artificially set weakest place in time.

The pressure cooker is made of high-quality aluminum plate or stainless steel plate by stamping, and its working pressure is 80~100 kPa. When selecting a pressure cooker, it is important to check whether the surface is smooth and clean, whether there are alkali stains, oil stains and water stains inside and outside the cooker, and more importantly, whether there are pits, dents, scratches, burrs and other defects, whether the bottom and sides of the cooker are smooth, round and neat, and whether there are pores and slag inclusions.

Then, whether aluminum pressure cooker or stainless steel pressure cooker is better depends on the economic strength of the buyer. Because the manufacturing process of stainless steel pressure cooker is difficult, the price is also slightly more expensive than aluminum pressure cooker. However, as far as the safety performance is concerned, as long as the pressure cooker is produced according to the national standards GB13623-92 and GB15066-94, it can ensure safe use. However, one thing must be clear, that is, no matter what kind of pressure cooker is, the service life should not exceed 8 years, and the consequences of the extended service will certainly outweigh the benefits.

According to the annual statistics of the Complaint Department of the China Consumer Association, the "Quarterly Statistical Table of Major Consumer Complaints" reported by the consumer associations in various provinces and cities across the country in 1997 showed that the explosion of pressure cookers accounted for more than 20% of the total complaints, causing one death and seven injuries and a large number of property damage. The statistics of major cases in 1998 showed that pressure cooker explosions accounted for 10% of the total, including three explosions in Zhejiang Sanmen from September to November. An old man named Zhu Helian used a pressure cooker to cook porridge. Only eight minutes after the rice was put into the fire, an explosion occurred, causing three fractures and mental disorders in her body. A 25-year-old victim of the explosion of a pressure cooker was blinded and even thought of dying because of his broken eyes.

The comprehensive analysis of the causes of several accidents shows that:

Generally, the pressure cooker involved in the accident is the old standard pressure cooker and the pressure cooker with "extended service" that the state has explicitly prohibited from being produced and sold. Of course, there are also cases where the user is not clear about the working principle of the pressure cooker, the performance and role of the safety parts, and therefore cannot use the pressure cooker reasonably. According to the technical supervision department, the old pressure cooker is defective in design and lacks necessary safety devices. The old standard (ZBY3006-85) has been out of use since 1993, and a new national standard (GB13623-92) has been put into use. However, some pressure cooker manufacturers did not comply with the new standards, and some even cheated consumers by marking new labels on old style cookers.

In a sense, the key to forming the high pressure of the pressure cooker is the rubber ring of the pressure cooker, while the key to achieving pressure reduction is the "pressure reducing valve" and fusible sheet.

The gasket of pressure cooker is made of rubber as the main raw material, and many additives such as vulcanizing agent, anti-aging agent, active agent, filler and colorant are used in the processing. In order to reduce the production cost, some illegal manufacturers have added some non food additives, which are easy to cause food pollution and cause adverse effects on human body in the process of use. In order to keep the pressure cooker under high pressure, experts suggest that you should prepare two rubber rings at home, one of which is specially used for cooking oily food, so that the service life of the other rubber ring can be extended by 3 to 5 times.

In addition, during the service life of the pressure cooker, the performance of the five safety parts "cover, hole, valve, ring and sheet" must be mastered.

Cover: The upper and lower handles shall be closed when closing the cover, and the cover shall be opened after cooling.

Hole: before use, check whether the exhaust hole is unobstructed, and remove the blockage of the anti blocking cover and the stop valve in time.

Valve: The pressure limiting valve shall not be used to pressurize heavy objects, nor can it be replaced by other objects. When the safety valve exhausts, it indicates that the pressure in the boiler has exceeded the pressure, and the fire source should be turned off immediately or the light fire should be used instead.

Ring: The sealing ring of the pot cover shall be cleaned after each use and wetted before use. In case of aging, air leakage and deformation, it shall be renewed immediately.

Sheet: This is a safety, low melting point alloy sheet that has been strictly measured, and can never be replaced by any other metal sheet; Food residues shall not be attached to the fusible chip to avoid affecting heat conduction.