- Home >> Solution >> Appliances >> cookers
Electric pressure cooker solution
As the name suggests, an electric pressure cooker is an appliance that uses electric energy as the source of heat and cooks the food in the pot under the conditions of high temperature and pressure. It should have the characteristics of high cooking temperature and shortened cooking time of the pressure cooker, and at the same time, it should overcome the unsafe factors of the explosive pot of the common pressure cooker. Therefore, we believe that the electric pressure cooker should have at least the following four characteristics: 1. Use electric energy as the energy source, high cooking temperature in the pot to shorten the cooking time, safe and reliable, automatic cooking, and automatic control of the whole cooking process.
China's small household appliance industry is making great strides towards more intelligent, healthy and fashionable high-tech products. With the further expansion of consumer demand, the homogenization of home appliances, the accelerated pace of product replacement, the continuous introduction and revision of national and industry standards, and other factors, companies are increasingly focusing on continuous improvement of product performance and product connotation. Related patented technologies and achievements are also emerging. Electric pressure cooker is currently the largest and fastest-growing product in the kitchen appliance market, and its technological innovation has attracted the attention of the industry.
1. Advantages of electric pressure cooker
The electric pressure cooker realizes fully-sealed cooking during cooking, that is, when cooking, no heat comes out, and the food in the cooking is completely in a fully-sealed state. This cooking state has three advantages: less heat loss, less loss of food nutrients, and less water consumption. . In addition, the heat preservation performance of the electric pressure cooker is good, and the temperature control is accurate and timely, which makes the energy-saving effect of the electric pressure cooker very significant.
Electric pressure cooker, as a relatively prominent product at present, has the following characteristics:
(1) The use of an electric pressure cooker can not only shorten the cooking time, but also save electricity, which caters to the psychology of consumers who are unwilling to spend a lot of time on cooking.
(2) The use of an electric pressure cooker is not affected by the external air pressure. Also maintain good usability in the plateau area with higher altitude has fundamentally ended the history of people eating half-cooked food in the plateau low pressure area.
(3) The entire cooking process is completed in a fully sealed state without boiling to keep the original taste of the food. The pressure is continuously adjustable and the pressure can be maintained according to different foods. Different pressures and pressure holding times can be set for the food, and the food nutrition preservation rate is high.
(4) It has multiple functions such as cooking, stewing, porridge and soup, and can automatically keep warm, and the liquid in the pot will not overflow the pot. It is easy to operate, convenient and worry-free.
(5) The electric pressure cooker is equipped with float valve exhaust valve, safety valve, anti-blocking cover, over-temperature fuse, etc. to prevent explosion due to excessive temperature in the pot, and is safe and reliable to use.
2. Classification and structure of electric pressure cooker
At present, there are various types of pressure cookers on the market, which can be classified from different angles.
According to the material of the inner pot, it can be divided into aluminum inner pot and stainless steel inner pot. The aluminum inner pot is made of pure aluminum or aluminum alloy plate. Aluminum inner pots can be divided into coated non-stick pans, coated with high-temperature paint, polished inner pots and oxidized inner pots according to the surface treatment method. The oxidized inner pot can be divided into sulfuric acid oxidized, oxalic acid oxidized, porcelain oxidized, hard oxidized, etc. The surface layer of the hard oxidized inner pot is thick and hard, and has good wear resistance. The non-stick layer inner pot will not burn food when cooking. Burnt and easy to clean. The stainless steel inner pot is processed and formed from stainless steel plates, the surface is smooth and not easy to rust, and long-term use has no effect on human health.
According to the structure of the bottom of the pot, it is divided into pressure cooker without double bottom, single double bottom pressure cooker and double double bottom pressure cooker. Double double bottom stainless steel pressure cooker has the best performance.
According to different closing forms, it can be divided into screw-on pressure cooker, gland-type pressure cooker, drop-cover pressure cooker, clamp-type pressure cooker, etc. Domestically, the screw-on pressure cooker is the most widely used, followed by the gland-type pressure cooker. The screw-in mechanical pressure cooker is mainly composed of outer pot, inner pot sealing ring of pot lid, float valve pressure limiting and venting valve, electric heating plate, control box pressure regulating knob, buttons and indicator lights, etc.
Fully enclosed cooking, three-dimensional heating, and wall thickness uniform temperature technology are another advantages of leading electric pressure cooker technology. High-end electric rice cookers use a three-dimensional heating scheme of adding side wall heaters and top heaters to achieve the purpose of uniform rice quality in various parts of the pot, and increase the wall thickness of the inner pot to improve the heating uniformity of the rice in the inner pot. The effect is that the quality of rice in various parts of the pot is far less uniform than that of an electric pressure cooker working under full sealing.
3. Technical points of the electric pressure cooker solution
1. Accurate pressure control and temperature control technology of electric pressure cooker
Most of the electric pressure cookers on the market are composed of pot lids, inner pots, electric heating plates, medium pots, micro switches and chassis. The size change of the working pressure in the electric pressure cooker is implemented indirectly by the position change of several parts after the movement of the pressure, instead of directly controlling the power on and off of the electric pressure cooker through the change of the air pressure in the pot, so many The precision of product pressure control is relatively low, and the reliability is also relatively poor. Moreover, the inner pot and the elastic member expand under pressure and move up and down frequently, which easily leads to the denaturation of the inner pot and the elastic member, reducing the precision of its pressure control.
Therefore, many mainstream brands have invested heavily in the research and development of precise pressure control of electric pressure cookers, and have achieved certain breakthroughs. The precise pressure control and temperature control device of the electric pressure cooker uses the pressure transmission set on the cover of the pressure cooker to perform pressure conversion and transmission, which avoids the need for the traditional pressure cooker to transmit and detect the pressure by means of the deformation and displacement of the inner pot and other components, and extends the inner pot. And the service life of the medium pot, and the gap of the pressure transmission device is small, the mechanical structure is reliable and the transmission is stable, and the sensitive temperature sensor can accurately control the pressure and temperature in the electric pressure cooker.
2. Pressure regulation and automatic pressure relief technology of electric pressure cooker
For different foods in the cooking process, different cooking stages are suitable for different cooking temperatures. Therefore, to control the cooking pressure range, it is necessary to achieve precise control and repeatable pressure adjustment of the cooking pressure, and this is the core technology of the electric pressure cooker that is still immature.
The adjustable pressure and automatic pressure release device of the electric pressure cooker comprises a pot body and a pot cover, a cover body is arranged on the pot cover body, an air vent and a pressure regulating mechanism are arranged on the cover body. When the pressure cooker is heated, the pressure inside the pot rises, and the rising pressure presses the floating body and then compresses the elastic element. When the floating body rises above the vent hole, a pressure relief channel is formed to realize the purpose of releasing excess pressure in the pot. The vent hole It is discharged into the lock body, and then discharged out of the lock, there is a buffer process, so that the pressure will not fluctuate. This invention has three major features: first, the present invention is equipped with a pressure regulating mechanism, and the pressure in the pot can be adjusted within a certain range; second, overpressure is self-relieving, safe and reliable; The air hole can effectively avoid the blockage of the vent hole, eliminate the explosion phenomenon of the pressure cooker, save heat energy and not be blocked, and is safe and reliable to use.
3. Electric pressure cooker heating technology and energy saving and consumption reduction
Existing electric pressure cookers all use electric heating tubes for heating, but the heating efficiency of the electric heating tubes is low and the heating is uneven, so it is easy to affect the cooking of the food in the pot.
In order to improve the above shortcomings, some brands currently use an electromagnetic heating plate with high heating efficiency and uniform heating as the heating device of the electric pressure cooker, and change the lighter inner tank made of aluminum alloy to one made of magnetically conductive stainless steel. Simultaneously, the liner of heavier magnetic-permeable stainless steel will inevitably bring inconvenience to people moving or cleaning the electric pressure cooker.
A new heat conduction solution is provided aiming at the deficiencies in the prior art. An electric pressure cooker with a magnetically conductive plate added to the bottom of the original aluminum alloy pot body. That is, the inner tank includes a pot body made of aluminum alloy, and a magnetic conductive plate is fixed at the bottom of the pot body. Due to the addition of a magnetic conductive plate at the bottom of the pot body, the electric pressure cooker can use an electromagnetic heating plate as a heating device, thereby achieving high heating efficiency. , The purpose of uniform heating. Moreover, the inner tank of the electric pressure cooker maintains the advantage of the lighter weight of the original aluminum alloy inner tank. This kind of liner optimizes the use of thermal energy efficiency, realizes the importance of temperature to food cooking and exerts nutritional value, and at the same time has the advantages of energy saving, consumption reduction, lightness and practicality.
4. Safety technology of electric pressure cooker
Technically, electric pressure cookers are completely safe. The electric pressure cooker can automatically, accurately and timely control the heating source. When the temperature in the pot reaches the set value, the circuit of the heating source will be cut off in time, and the heating will be stopped immediately, and high temperature and high pressure will not be generated in the pot, of course, a dangerous state will not occur. The electric pressure cooker implements fully sealed cooking, unlike a pressure cooker that relies on vent holes and air valves to control the pressure in the pot. Therefore, there is no danger of the exhaust hole being blocked during normal operation. When the control system fails, such as heating cannot be stopped, the electric pressure cooker has unique and effective safety measures.
The bottom of the steel shell outside the inner pot of the electric pressure cooker is an elastic diaphragm. During cooking, as the pressure in the pot increases, the inner pot pushes the diaphragm at the bottom of the outer pot to deform downward under the action of pressure, and the inner pot follows the pressure. to move down. In normal operation, when the pressure inside the pot reaches the set value, stop heating and the inner pot stops moving downward, and the sealing state between the inner pot and the sealing ring pot cover will not be destroyed, but if the control system fails, the heat source inside the pot cannot be cut off As the heating continues, the pressure in the pot will continue to rise. Under the action of the internal pressure of the pot, the inner pot will continuously move downward along with the downward deformation of the diaphragm at the bottom of the outer pot. When the downward displacement of the inner pot exceeds the safety standard, a gap between the inner pot and the sealing ring of the pot lid will be sealed. Destruction, high-pressure gas leaks from the gap, we call it pressure relief to reduce the pressure in the pot to ensure the safety of the electric pressure cooker. The pressure relief formed in this way cannot be blocked. It can be imagined that if the pressure relief passage formed for the first time is blocked, the pressure in the pot will continue to rise as a result of which the inner pot continues to move down to form a new pressure relief passage.
5. Best cooking temperature technology for electric pressure cooker
The cooking temperature of the electric rice cooker can only be limited to the boiling point temperature in the area of use and cannot exceed this temperature. In the advanced electric rice cooker, a temperature sensor located outside the inner pot is used to control the heating curve of the rice through computer programming using fuzzy theory. This heating curve is obtained according to the traditional boiling cooking method through the statistical laws of various cooking factors, and the electric pressure cooker can be cooked according to the optimal cooking temperature of rice or other foods. The product is simple and reliable, low in cost, the cooking effect is obviously better than the heating curve scheme, and can adapt to more foods. The optimal cooking greatly expands the functions.
6. High thermal efficiency technology
For improving the heat efficiency of electric rice cooker, manufacturer is still doing energy-saving work in two aspects of improving heating heat conduction efficiency and reducing loss. If far-infrared radiation heating and electromagnetic induction heating are used, although the heater used as a rice cooker improves the heat conduction efficiency to a certain extent, because the conduction heat loss only accounts for about one-tenth of the total energy consumption, it is necessary to use a large It is not worth the candle to increase the cost of the heater to obtain the energy saving effect which accounts for less than a few percent of the total electricity consumption. In contrast, the electric pressure cooker saves all the heat of vaporization, that is, the power consumption during boiling, which accounts for 40% of the total power consumption, thereby achieving a technical improvement in energy saving compared to the electric rice cooker. It should be pointed out that the thermal efficiency of an electric rice cooker refers to the heat conduction efficiency. The current product has reached about 100,000, but its cooking thermal efficiency is only about 100,000, while the thermal efficiency of an electric pressure cooker is close to that. From the perspective of energy saving, the non-boiling cooking of an electric pressure cooker has a great advantage over an electric rice cooker. .
7. Mechatronics Technology
The non-boiling full-flavor cooking method uses modern sealing technology to realize full-flavor cooking and modern pneumatic control technology to realize automatic control of the temperature in the pot. It is a new technology that integrates non-boiling full-flavor cooking and pneumatic control technology under fully sealed conditions. For full-flavor cooking, the temperature in the pot is automatically controlled by the air pressure generated in the cooking pot. The temperature control range in the pot has reached room temperature-1°C. The temperature control sensitivity can reach up to 0.2°C.
4.The plan summary of electric pressure cooker
Although the scale is continuously improving, the competition of electric pressure cookers tends to be more competitive on the product technology level. However, the current mainstream electric pressure cooker is still affected by factors such as technical level, process level, and production cost. There is still a lot of room for development and improvement in technical aspects such as cooking pressure, cooking structure, energy saving and consumption reduction, and function expansion.
The pressure-type products of electric rice cookers have made obvious progress in cooking quality and taste due to the change of the cooking temperature in the pot. At the same time, they have gained advantages in function expansion and energy saving, but the technical status of pressure cookers is relatively low, so no substantial progress has been made. This pressure Type rice cooker has all the disadvantages of pressure cooker, such as unsafe factors in use, high cost of materials, frequent replacement of sealing rings, etc. In the market competition in recent decades, although many domestic and foreign enterprises have continued to invest, they have not finally occupied the market. rice cooker market.
The electronic products of electric rice cookers have achieved good commercial results by taking advantage of the advantages of modern electronic technology. Because this scheme does not yet appear the product that can change the temperature in the pot, so the main technical indicators such as the cooking quality of its product, energy saving and function expansion, are not as outstanding as the characteristics of the pressure type product.
In the process of developing new products of the electric rice cooker to the pressure type, this series of electric pressure cooker products without boiling that are automatically controlled by elastic elements appears. In addition to retaining the advantages of mechanical pressure products, electric pressure cookers have introduced electronic technology in the temperature control system, pressure control system, timing system and automatic indication, which has improved the grade of products and increased the variety of products. In addition to multi-functional electric pressure cookers Special pressure cookers outside, such as milk pots, coffee pots, egg pots, special pots for car drivers, etc., can also develop ceramic pressure cookers featuring nutrition, flavor, health care and nourishment. A wide range of non-boiling series electric pressure cooker products.
The above are the details of the electric pressure cooker solution introduced by Shenzhen Zuichuang Microelectronics Co., Ltd. for you. If you have electronic function development needs for electric pressure cookers, you can trust us. We have rich experience in customized development of electronic products, and can evaluate the development cycle and IC price as soon as possible, and can also calculate PCBA quotations. We are a number of chip agents at home and abroad, including MCU, voice IC, Bluetooth IC and modules, wifi modules. Our development capabilities cover PCB design, single-chip microcomputer development, software custom development, APP custom development, WeChat official account development and other hardware and software design. It can also undertake the research and development of smart electronic products, household appliances scheme design, beauty equipment development, Internet of Things application development, smart home scheme design, TWS scheme development, Bluetooth audio development, children's toy scheme development, and electronic education product development.
- TOP