WO2009015531A1 - Multifunction steamer and control method thereof - Google Patents

Abstract

A multifunction steamer and a control method thereof are provided. The multifunction steamer (10) includes a main body (11), a steaming plate unit (20), a steam relay base (30), wherein a steam nozzle (12) is at least disposed at the bottom of the body, which connects the outerside of the bottom of the body with the inner chamber of the body and emits steam stored in the steam relay base into the inner chamber of the body. The steaming plate unit has two interspaces which are concentric, wherein the inside space provides a space for steaming food and the outside space is a steam condensing and recycling device, to improve the condensing effect of the steam. The condensing water recycled in the outside chamber flows into the body of the steamer so as to become juice. The steam arisen from a steam generator (7) is used to heat the bottom of the body and is emitted to the inner chamber of the body through the steam nozzle.

Description

 Multifunctional steamer and its control method

 The invention relates to a pot for heating food by using steam, in particular to a multi-function steam pot and a control method thereof for ensuring an effective cooking temperature by using a gas-liquid two-phase steam state of a pot, and a gas-tight structure of the multi-function steam boiler, The steam environment of the body cavity of the boiler is isolated from the outside, the steam pressure can be greater than the external atmospheric pressure, the steam temperature is increased, and the food is matured; the control method controls the steam temperature of the body of the steam boiler by controlling the steam injection amount. The steam waste is avoided, the steam utilization efficiency is improved, and the purpose of energy saving and water saving is achieved. The steam tray device of the multifunctional steam boiler of the invention has a structure for promoting steam condensation, improves steam condensation efficiency, and simultaneously softens hard water during cooking. . Background technique

 Steam cooking is the earliest use of Chinese people, dating back to the Yanhuang period four or five thousand years ago. Modern medical research has shown that steam cooking is the best cooking method, best preserves food nutrition, and does not produce harmful substances.

 Steam is a very efficient heat transfer medium. The reason is that liquid water is heated and vaporized, and it needs to absorb a large amount of heat (vaporization heat). The steam contains huge vaporization heat (latent heat), and when the steam comes into contact with food, it is released. Latent heat, heating the food. Compared to the oven's 150 - 250 degrees Celsius, the steam can be cooked at 100 degrees Celsius.

 However, steam cooking also has weaknesses. At high altitudes, atmospheric pressure is low, water is more likely to evaporate, water boiling point is lowered, steam temperature is also lowered, and food is not easily ripened. At high altitudes, general boiled or steamed pots must be Increase cooking time. The pressure cooker eliminates the problem of a drop in the boiling point of water at high altitudes, increases the steam temperature, and speeds up cooking, as shown in U.S. Patent No. 4,627,417, US Pat.

 China's most famous steam cooking pot, it is a bamboo steamer and Yunnan steam pot. The bamboo steamer is a convection steamer, and the Yunnan steamer is a steamer that can be used at high altitudes.

 Yunnan steam boiler can produce the same effect of the pressure cooker. The steam injected into the steam boiler can increase the steam pressure inside the boiler body to achieve the purpose of raising the temperature of the water body (gas and liquid), improve the cooking temperature, and make the food easier to mature. This is the reason why Yunnan steam pot can get better cooking results at high altitudes.

In addition to using steam to heat the bottom of the pot, the steam in Yunnan also directly enters the inner cavity of the boiler. The temperature of the food in the pot is uniform, the soup liquid does not produce intense convection, and the soup is clear; the pressure cooker is heated directly at the bottom, such as the US patent. US4627417, the liquid in the pot will produce intense convection, causing the soup to turbid.

 When some people use Yunnan steamer, they emphasize that the inside of the pot should not be filled with water first. Therefore, when the cooking is completed, the soup in the pot is actually distilled water formed by steam condensation. Distilled water is a method of softening water, so the inside of the pot body When not adding water first, the boiler is suitable for use in hard water areas.

 However, the Yunnan steamer is cooled by the lid and turned into a water droplet. In addition to the low condensation efficiency, the long-term supply of steam is also a waste of energy. It is important to point out that when cooking food, the excess steam is actually taking away a lot of heat (vaporization heat), which is a waste of energy. A smoldering pot shown in U.S. Patent No. 6,179,155, after the temperature of the food reaches the ripening temperature, is transferred to the smoldering pot, and is insulated by the simmering pot, and the food is cooked with the waste heat of the food, and no new energy source is required.

 From the perspective of thermodynamics, Yunnan steam pot has some fundamental shortcomings, but it also has some unique advantages. In order to more scientifically exploit the advantages of the steam pot, the present invention discloses a multifunctional steam pot, which makes the steam pot conform to modernization. Cooking pots that require energy savings. Summary of the invention

 The main object of the present invention is to provide a multifunctional steam boiler, which makes the steam cooker a cooking pot that meets modern energy-saving requirements, and achieves the purpose of energy saving, water saving, convenience, and multifunction.

 Another object of the present invention is to provide a multifunctional steam boiler steaming device for improving the production efficiency of distilled water, softening hard water at the same time in the cooking process, and adapting the steam boiler to an area where the water quality is hard.

 A further object of the present invention is to provide a multi-function steam boiler control method for discharging air in a pan at an initial stage, filling the interior of the multi-function steam boiler with steam, and fully utilizing the physical advantage of the steam boiler to control the steam injection amount. Means, maintaining the steam pressure and temperature of the body cavity of the boiler, achieving the purpose of not wasting steam, saving energy and saving water.

 In order to achieve the above object, the technical solution of the present invention is:

The utility model relates to a multifunctional steam boiler, comprising a boiler body, a bottom of the boiler body, a steam nozzle connecting the outside of the bottom of the boiler body and the body cavity of the steam boiler body, and the steam is injected into the body cavity of the boiler body from the bottom of the steam boiler; The bottom end of the body is placed on the upper end of the steam generator along the airtightness; it further comprises a steaming disk device comprising an inner layer and an outer layer, wherein the inner and outer layers are concentrically arranged, and there is a gap between the inner and outer layers. The gap is a vapor recovery passage, wherein the outer layer is a steam condensation recovery device, including an outer side wall and an outer cover, the outer end of the cylindrical outer side wall has an inwardly projecting convex edge, and the annular convex side has a uniformly distributed through hole, the upper end The inner layer is a gas-heating space; the inner layer is a food heating space, including an inner side wall, a steaming plate and an inner cover, and a lower portion of the inner wall of the cylindrical shape has a stepped constriction, so that the lower port diameter is smaller than the upper port diameter, and the lower port diameter and the lower end of the outer side wall The inner edge of the flange is adapted, the stepped neck is placed at the inner edge of the flange, and the upper end of the inner side wall is covered with the inner cover Closed connection, the steaming plate is matched with the inner diameter of the inner side wall and placed on the stepped shrinkage; the inner cover has a venting hole; the lower end of the outer side wall is placed at the inner edge of the upper end of the boiler body, and the airtight connection is made, and the inner side wall is closed at the lower end On the circumference of the steam nozzle, the steam nozzle extends into the lower port of the inner wall, and the top of the steam nozzle is located below the steam pan;

 The steam generator is electrically connected to the controller, and the controller is a thermostat, and is electrically connected to the power source, the temperature sensor, and the cooking time setting device respectively;

 The steam generated by the steam generator is injected into the boiler body through the steam nozzle, enters the inner cavity of the steam tray device, and heats the food on the steam pan or the body of the steam boiler, and the rising steam overflows from the vent hole on the inner cover. After the vapor recovery passage, it is cooled and sinks, and condensed water is formed on the inner side of the outer side wall to flow down the outer side wall, and is dripped into the body of the steam pot through the through hole on the convex side to form a soup liquid.

 The multifunctional steam boiler has an outer wall of the steam tray device, which has a wave-shaped structure to increase the heat dissipation area and improve the steam condensation efficiency.

 The multi-function steamer further includes a steam relay base device, the steam relay base device such as a pot, the steam generator is a submerged electric heater, and is fixed on the bottom surface of the steam relay base device; The upper end edge of the base device is airtightly connected to the bottom end of the boiler body.

 The utility model further comprises a steam relay base device, wherein the steam relay base device is an annular container, the bottom surface of which has a through hole for the passage of steam, and the bottom circumference of the steam trap is placed on the steam generator. The upper end edge is airtightly connected to the bottom end of the boiler body.

 The multifunctional steamer is arranged between the boiler body and the steam relay base device, between the lower end of the outer wall of the boiler body and the steam tray device, between the upper end of the inner side wall and the inner cover, and between the upper end of the outer side wall and the outer cover. There is a latching mechanism to keep the internal steam pressure of the multi-function steamer larger than the external atmospheric pressure; at the same time, a safety valve is arranged on the outer cover.

 The multi-function steamer, the latching mechanism, is a thread or a buckle.

 The multi-function steam boiler, the body of the steam boiler is a double-layer pot wall, and the middle of the double-layer pot wall is a heat insulating layer to improve the heat preservation effect; the steam nozzle of the steam pot body is eccentrically arranged to facilitate large food placement; A vapor diffusion device is provided at the top of the steam nozzle.

 The multi-function steam boiler, the boiler body, is provided with a venting device on the side wall thereof, which is an automatic throttle venting valve device for the steamer, and excludes the inside of the steam boiler at the initial stage of steam entering the boiler body The air is filled with steam inside the steam boiler. When the steam temperature of the steam outlet automatically throttles the exhaust valve device to reach the rated value, the exhaust port is closed; the steamer automatic throttle exhaust valve device is electrically connected to the controller.

 The multifunctional steam boiler has a temperature rating that is lower than a boiling temperature of the water.

The multifunctional steam boiler further includes a control panel having a cooking mode selection button, a cooking mode For pressure cooker mode or boring pot mode.

 A control method for the multifunctional steamer, comprising the steps of:

 a), setting the controller of the steam generator, setting the upper limit first temperature value to be an open circuit; the lower limit second temperature value as a path; setting the cooking time for the cooking time setting device;

 b), power on, the cooking time setting device starts timing;

 c), when the temperature in the body of the boiler reaches a predetermined value, the exhaust device automatically closes and enters the steam cooking stage;

 d), in the steam cooking stage, when the steam temperature in the steam relay base device rises to a set first temperature value, the supply of steam is stopped;

 e), after the supply of steam is stopped, the temperature begins to decrease, and when the steam temperature in the steam relay base device drops to a set second temperature value, the supply steam is resumed;

 f), repeat d), e) steps until the end of cooking.

 The control method of the multifunctional steam boiler, wherein the first temperature setting value is greater than a temperature setting value of the exhaust device, and the second temperature setting value is not less than 65 degrees Celsius; the first temperature setting value and the second temperature setting value The temperature setting defines a cooking steam temperature range.

 The control method of the multifunctional steam boiler, the setting of the cooking steam temperature interval is automatically performed in a manner of selecting a cooking mode, and is automatically set by a controller of the steam generator according to a default value of the selected cooking mode.

 It can be seen from the above technical solutions that the present invention has the following beneficial effects:

 1. The multifunctional steam boiler provided by the invention conforms to the principle of thermodynamics, and has the advantages of high efficiency, light weight, easy cleaning and maintenance, multi-functionality and the like.

 2. The multifunctional steam boiler provided by the invention can be used as a dry steaming device or as a steaming and steaming device for cooking and cooking.

3. The utility model provides a multi-function steamer, a heat-insulating pot cover and a heat-insulating boiler body to prevent heat energy from spreading, and can play the function of the stuffing pot to achieve the purpose of energy saving.

 4. The multifunctional steam boiler provided by the invention is not affected by altitude when in use.

 5. The utility model provides a multifunctional steam boiler steaming device. The steaming disk device has a concentric double-layer structure, the inner layer is a food heating space, and the outer layer is a steam condensation recovery device, which improves steam condensation efficiency and outer layer recovery condensation. Water, flowing into the body of the boiler, softens the hard water at the same time during cooking, making the boiler suitable for use in hard water areas. DRAWINGS

Figure 1 is a schematic diagram of the principle of a traditional Yunnan steamer; 2 is an explanatory diagram of constituent units of an embodiment of a multi-function steamer;

 Figure 3 (a) is an explanatory view of the exhaust device;

 Figure 3 (b) is a cross-sectional view taken along line B-B of Figure 3 (a);

 Figure 4 is an explanatory view of a multi-function steamer steaming device;

 Figure 5 (a) is an explanatory view of an embodiment in which the multi-function steamer steam nozzle is positioned close to the peripheral wall;

 Figure 5 (b) is a cross-sectional view taken along line A-A of Figure 5 (a);

 Figure 6 is an explanatory view of an application example of a multi-function steamer as a steamer;

 Figure 7 is an explanatory view of an application example of a multi-function steamer as a stuffing pot;

 Figure 8 is an explanatory view showing a control method of the utility model of the utility model of the present invention;

 Fig. 9 is an explanatory view showing a control method of a multi-function steam boiler of the present invention as an application method of a stuffing pot. detailed description

 First, the principle of Yunnan steamer is illustrated. Figure 1 is a schematic diagram of the principle of a traditional Yunnan steamer. The characteristics of the Yunnan steamer are the steam nozzle 2 located at the bottom of the bottom of the pot body 1, and the steam generator outside the pot body, that is, the skillet 5 The generated steam 3 is injected into the inner cavity of the pot body 1 through the steam nozzle 2, and the food is heated. The upper part of the pot body has a lid 4, and the handle of the pot lid 4 has a small exhaust hole. Not shown, the pot body 1 and the lid 4 are all fired from a ceramic material. As shown by the thick black line in Fig. 1, the boiler pot body 1 communicates with the interior of the skillet 5 to form a space 6 which is isolated from the outside atmosphere, and the water vapor 3 generated by the skillet 5 causes the internal vapor pressure of the isolated space 6. Increasing enthalpy, the steam temperature of the isolated space 6 is also increased, so that the food is easier to mature. When used, the lid and the pot body should be airtightly fixed between the pot body and the skillet 5 so as not to leak air and not be vapor pressure. When the top is opened, the bottom of the boiler is not directly exposed to fire. In addition to being heated by the bottom steam, the food in the pot is also heated by the steam 3 injected into the inner cavity of the pot body 1 at the bottom of the boiler, because the upper and lower steam temperatures are the same, the food in the pot and The soup does not produce severe convection, and the soup is clear and turbid. When some people use Yunnan steamer, they emphasize that the inside of the pot should not be filled with water first. Therefore, the soup in the pot is actually distilled water formed by steam condensation when cooking is completed, but the Yunnan steamer is cooled by the lid and condensed into water droplets. , the efficiency is very poor, therefore, to use a large pot 5, waste a lot of water and energy.

 2 is an explanatory diagram of constituent units of an embodiment of a multi-function steamer of the present invention, and the multi-function steamer 10 includes a boiler body

1 1. a steaming tray device 20, a steam relay base device 30; at the bottom of the boiler body 11, there is a steam nozzle 12 that communicates with the outside of the bottom of the boiler body and the body cavity of the boiler; the vapor generated by the steam generator 7 Via steam nozzle

12, the bottom of the boiler body 11 is injected into the body cavity of the boiler to heat the food; the steaming tray device 20 is stacked on the boiler body 11, the steaming tray device 20 is a concentric double-layer structure, and the inner layer structure 21 is a food heating space. , outer structure 22 For the steam condensation recovery device, the steam condensation efficiency is increased, the condensed water recovered by the outer layer 22 flows into the boiler body 11; the outer structure 22 of the steam tray device has a wave-shaped structure 23 with an increased heat dissipation area, which improves contact with the atmosphere. The inner layer structure 21 is provided with an inner layer lid 24, and the inner layer lid 24 has a venting aperture 25 for allowing steam to pass therethrough, and the venting aperture 25 increases the steam resistance, so that the food is heated by the inner layer structure 21, convectively enters The steam recovery passage 26 does not return steam; the heat insulation cover 14 is an external lid to prevent heat energy from being lost from the lid, thereby improving heat utilization efficiency. For example, the heat insulation cover 14 is made of double-layer stainless steel, using the middle The air layer is insulated, and a safety valve 16 is arranged on the lid. When the steam pressure in the pot exceeds a safe set value, for example, 2 atmosphere pressure, steam is released; the steam relay base device 30 is a steam relay storage device, and the boiler body 11 Placed on the steam relay base device 30, the bottom of the boiler body 11 sinks into the steam relay base device 30, and is heated by steam; the steam relay base device 30 passes through the boiler body 11 The steam nozzle 12 is in communication with the body cavity of the boiler; the steam generator 7 may be a stand-alone device or may be integrated with the steam relay base device 30, as shown in FIG. 6; the vapor diffusion device 15 on the steam nozzle 12 The steam is not directly directed to the food; the upper edge of the boiler body 11 passes over the steam nozzle 12, and a temperature-controlled exhaust device 17 is provided. The exhaust device 17 is closed when the temperature reaches the rated value, and the function of the exhaust device 17 is During the initial stage of steam entering the body of the boiler, the air inside the boiler is excluded. When the interior of the multifunctional boiler is filled with steam, the temperature of the periphery of the exhaust device 17 will rise with the temperature of the steam. When the temperature reaches a rating close to 100 degrees Celsius, For example, at 93 degrees Celsius, the exhaust unit 17 is closed, and the internal environment of the multi-function boiler enters a stage mainly controlled by two-phase changes of water vapor and liquid water. Between the external structure of the multifunctional steamer 10, including a heat insulating cover 14, a steaming tray device 20, a boiler body 11, a steam relay base device 30, and a latching mechanism such as a thread, a buckle, etc. (not shown) Shown), the latching mechanism keeps the airtightness of the multi-function steamer when the internal steam pressure is greater than the external atmospheric pressure.

Figure 3 (a) is an explanatory view of the multi-function steamer exhausting device of the present invention, which is a side sectional view of the exhausting device, and Figure 3 (b) is a cross-sectional view taken along line B-B of Figure 3 (a), showing the exhausting gas The shape of the bimetal in the device. The venting device 17 is a steam valve device that has been closed by steam temperature control (which has been patented separately), and mainly includes a base 170, a cavity 171 for accommodating bimetal, and a nut 172 for the base 170. The rubber gasket 173 is fixed on the wall 174. The base 170 is provided with a '0'-shaped sealing ring 175. The cover 177 and the base 170 enclose a chamber 171 for accommodating the bimetal 178. The air hole 179, the bimetal 178 can be freely bounced inside the chamber 171, and the exhaust port 180 of the base 170 has an exhaust port adjusting device 181 capable of adjusting the exhaust amount, and the bimetal 178 is normally shaped away from the '0'-shaped sealing ring 175, the shape of the bimetal 178 is as shown in Fig. 3 (b), the peripheral edge has a ventilation notch 176, and the vapor enters the chamber 171 through the air inlet hole 179 of the cover 177, passing through the periphery of the bimetal 178. The venting notch 176 leads to the vent 180. When the vapor temperature reaches the rated value, for example, 93 degrees Celsius, the shape of the bimetal 178 bounces back, presses on the '0'-shaped sealing ring 175, and closes the vent 180. The initial stage will first be in the boiler The air is removed to reduce the pressure on the pot during cooking, which is safe for the pot and personnel. 4 is an explanatory view of a multi-function steamer steaming device of the present invention, the steaming disk device 20 is a concentric double-layer structure, the inner layer structure 21 is a food heating space, a food steaming tray is placed, and the outer layer structure 22 is a steam condensation recovery device. The outer layer structure 22 of the steam tray device has a wave-shaped structure 23 with an increased heat dissipation area to improve the condensation efficiency of the distilled water; the inner layer structure 21 has an inner layer lid 24, and the inner layer lid 24 has small holes 25 to increase the steam resistance. The steam entering the vapor recovery passage of the outer layer structure 22 from the food heating space of the inner layer structure 21 does not flow back, and the outer layer structure 22 of the steam tray device is not limited to the wave structure 23, so as to increase the heat dissipation area, improve the condensation efficiency of the distilled water, and be beautiful. Easy to clean as a principle, each part can be removed for easy cleaning.

 Figure 5 (a) is an explanatory view showing an embodiment of the steam nozzle of the multi-function boiler body of the present invention, which is off-center position, which is a side sectional view of the boiler body, and Figure 5 (b) is the A-A line of Figure 5 (a) A cross-sectional view showing the position of the steam nozzle of the boiler body on the bottom surface. The steam nozzle 12 is positioned off-center, but is still located inside the inner layer structure 21, and the steam emitted from the steam nozzle 12 enters the food heating space inside the inner layer structure 21. This structure is advantageous for relatively large-sized ingredients to be directly placed. For example, whole chicken, as shown in Figure 7.

 6 is an explanatory view of an embodiment of the utility model of the present invention as a steamer, the steaming tray device 20 is placed on the boiler body 11, and the boiler body 11 is placed on the steam relay base device 30, and the boiler body is sunken. The steam relay base unit is heated by the steam supplied from the steam generator 7, and the steam relay base unit and the steam generator shown in Fig. 6 are an integral structure; the steam relay base unit 30 passes through the steam nozzle 12 of the boiler body 11. The gas is connected to the inner cavity of the boiler body 11, and the steam enters the inner cavity of the boiler body 11 through the steam nozzle 12. The inner cavity of the boiler body 11 communicates with the interior of the steam relay base device 30 to form a space 6 isolated from the outside, and the steam is generated. The steam 3 generated by the device 7 increases the steam pressure inside the isolated space 6, and the steam temperature of the isolated space 6 also increases. The steam continues to rise due to convection, heats the food, and releases latent heat when the steam contacts the food. The temperature of the steam is condensed into water droplets, which are dropped into the body 11 of the boiler, and the excess steam continues to rise, passing through the small hole 25 of the inner lid 24 of the steaming tray device 20. The steam recovery passage 26 enters between the inner structure 21 and the outer layer structure 22, and when the steam is recovered through the undulating structure 23, part of the steam condenses into water droplets due to lower temperature, flows into the boiler body 11 and drops into the steam by the food. The juice of the pot body is mixed into a soup solution, because the liquid flowing into the body 11 of the boiler is steam condensed water, and the softening of the water body in the steam generator 7 is actually completed during the cooking.

 In the application embodiment shown in Fig. 6, the food may be placed in the steaming tray device 20 or in the boiler body 11, depending on the type of food and the desired cooking effect, it is not necessary to add water in advance in the boiler body 11 because It is heated by steam, and there is no concern about coking.

The steam generator 7 shown in FIG. 6 is a submerged electric heater disposed in the steam relay base device 30, and the temperature. When the sensor 27 measures that the steam temperature in the steam relay base device 30 reaches the first set temperature, for example, 110 degrees Celsius, the controller 28 turns off the power of the steam generator 7, stops heating, stops supplying steam, stops supplying steam, and then stops the inside of the pot. Since the steam loses heat, the steam pressure and temperature begin to drop, and when the temperature drops to the second set temperature, for example, 95 degrees Celsius, the controller 28 resumes supplying power to the steam generator 7, restoring the supply of steam, and maintaining the steam supply to maintain the food ripening. Prevailing, steam is not wasted, water consumption and energy are saved. The controller 28 can set the cooking time setting means 29 to complete the cooking time T and cut off the steam supply power. The wavy structure 23 has a large heat dissipation area, accelerates steam condensation, causes the steam pressure to drop rapidly, and the time interval for recovering the supply steam is short, and the steam condensation efficiency will dominate the time interval for supplying steam.

 As shown in Fig. 7, it is a schematic diagram of a multi-function steamer used as a stuffing pot. The steam nozzle body shown in Fig. 5 is offset from the center of the boiler body 11, and larger food materials can be directly placed, such as whole chicken. When the multi-function steamer shown in Fig. 7 is used as a boring pot, the steam 3 generated by the steam generator 7 is injected into the body cavity of the boiler body 11 through the steam nozzle 12 at the bottom of the boiler body 11, and the food is heated. The upper part of the boiler body 11 has a heat insulating cover 14; the inner cavity of the boiler body 11 communicates with the interior of the steam relay base device 30 to form a space 6 isolated from the outside, and the steam relay base device and the steam generator are integrated structures. The steam 3 generated by the steam generator 7 increases the steam pressure inside the isolated space 6, and the steam temperature of the isolated space 6 also increases, and the temperature of the isolated space 6 is controlled by the amount of vapor generated by the steam generator 7.

 When the multi-function steamer shown in Fig. 7 is used as a simmering pot, since the function of accelerating heat dissipation is not required, the steaming tray device 20 is not used. In order to improve the heat insulating effect, the boiler body 11 is made of a double layer made of stainless steel. The wall 18 is insulated by the middle air layer, and the control method selects the simmering pot mode shown in Fig. 9, and the food is suffocated by the boring pot principle.

 8 is an explanatory diagram of a control method of the utility model of the present invention as a steamer, wherein the peripheral steam temperature of the exhaust device 17 reaches 93 degrees Celsius at time C, the exhaust device 17 is closed, and the steam temperature is accelerated to the first set temperature. When, for example, 110 degrees Celsius, the temperature sensor 27 signals the controller 28 to turn off the steam generator 7 power supply, stop heating, stop supplying steam, and stop supplying steam, the steam pressure and temperature begin to drop, and when the temperature drops to the second set temperature, For example, at 95 degrees Celsius, the controller 28 resumes powering the steam generator 7, recovering the supply of steam, and the steam supply is required to maintain the actual food ripening, the steam is not wasted, and the water consumption and energy are saved. The controller 28 can set the cooking time setting means 29 to complete the cooking time Τ, cut off the steam supply power supply or enter the holding state, not shown. During the cooking process, the steam temperature inside the multi-function boiler is controlled within a range in which the food is aged in the cooking steam temperature range. At 110 degrees Celsius, the saturated steam pressure is 1.415 standard atmospheric pressure, and the multi-function steam functions like a pressure cooker and a quick cooker.

9 is an explanatory diagram of a control method of a multi-function steamer of the present invention as an application method of a stuffing pot, as a boring pot application, Because there is no steaming device 20 to accelerate heat dissipation, the heat dissipation of the pot body is slow, the cooling time is extended, and most of the cooking process is in a state of static smoldering. The temperature of the heating can be set at 85 degrees Celsius, because 85 degrees Celsius is cooked food. Temperature, holding temperature can be set at 68 degrees Celsius to ensure that microorganisms do not breed. The controller 28 can set the cooking time setting means 29 to complete the cooking time T, cut off the steam supply power source or enter the holding state, not shown. During the cooking process, the steam temperature inside the multi-function boiler is controlled within a range in which the food is aged in the cooking steam temperature range.

 The control panel of the multifunctional steamer of the present invention (not shown) sets the cooking mode selection button, and when the cooking mode is selected, for example, a quick cooker (pressure cooker) mode or a stuffy pan (slow pan) mode, the cooking steam temperature interval is determined by default. The value is automatically set and can be fine-tuned by the user if necessary.

 The multifunctional steam boiler of the invention has various functions such as a pressure cooker, a quick cooker, a slow cooker, a stuffed pot, and a low temperature cooking, and has the advantages of multi-purpose, energy saving and convenience. Steam cooking best preserves food nutrition and does not produce harmful substances, especially for medicated cooking. Because it can soften the water, it is beneficial to hard water areas; because of the performance of the pressure cooker, it is also conducive to cooking in the highlands.

Claims

1. A multifunctional steam boiler comprising a boiler body, a bottom of the boiler body, a steam nozzle connecting the outside of the boiler body to the outside of the boiler body, and steam is injected into the body cavity of the boiler from the outside of the boiler; The bottom end of the boiler body is placed at the upper end of the steam generator along the air-tightness; and is characterized in that it further comprises a steaming disc device comprising an inner layer and an outer layer, and the inner and outer layers are concentric set structures, inner and outer layers There is a gap, the gap is a vapor recovery passage, wherein the outer layer is a steam condensation recovery device, including an outer side wall and an outer cover, and the lower end of the cylindrical outer side wall has a convex edge protruding inward, and the annular convex edge is evenly distributed The through hole has an airtight connection between the upper end and the outer cover; the inner layer is a food heating space, including an inner side wall, a steaming plate and an inner cover, and a lower portion of the inner side wall of the cylindrical body has a stepped constriction, so that the lower port diameter is smaller than the upper port diameter, and the lower end thereof The caliber is adapted to the inner edge of the flange at the lower end of the outer side wall, the stepped constriction is placed at the inner edge of the flange, and the upper end of the inner side wall is air-tightly connected with the inner cover, and the steam tray is matched with the inner diameter of the inner side wall, and is placed on the table. Shaped constrictor port; cover has inner vent holes;  The lower end of the outer side wall is placed at the inner edge of the upper end of the boiler body, and is gas-tightly connected. The lower end wall of the inner side wall surrounds the circumference of the steam nozzle, the steam nozzle extends into the lower port of the inner side wall, and the top end of the steam nozzle is located below the steaming tray;  The steam generator is electrically connected to the controller, and the controller is a thermostat, and is electrically connected to the power source, the temperature sensor, and the cooking time setting device respectively;  The steam generated by the steam generator is injected into the boiler body through the steam nozzle, enters the inner cavity of the steam tray device, and heats the food on the steam pan or the body of the steam boiler, and the rising steam overflows from the vent hole on the inner cover. After the vapor recovery passage, it is cooled and sinks, and condensed water is formed on the inner side of the outer side wall to flow down the outer side wall, and is dripped into the body of the steam pot through the through hole on the convex side to form a soup liquid.  2. The multi-function steamer according to claim 1, wherein the outer side of the steaming device has a wave-shaped structure to increase a heat dissipation area and improve steam condensation efficiency.  3. The multifunctional steam boiler according to claim 1, further comprising a steam relay base device, the steam relay base device such as a pot, the steam generator being a submerged electric heater, and being fixed in the steam Following the bottom surface of the base unit; the upper end edge of the steam relay base unit is hermetically connected to the bottom end of the boiler body.  4. The multi-function steamer according to claim 1, further comprising a steam relay base device, wherein the steam relay base device is an annular container having a through hole in the center of the bottom surface for vapor passage, the bottom surface thereof The circumference is placed on the steam generator, and the upper end is hermetically connected to the bottom end of the boiler body. The multi-function steamer according to claim 1, 3 or 4, wherein between the boiler body and the steam relay base device, between the lower end of the outer wall of the boiler body and the steam tray device, and the upper end of the inner wall Inner cover, outer side wall Between the upper end and the outer cover, a latching mechanism is provided, so that the internal steam pressure of the multifunctional steam boiler is greater than that of the external atmospheric pressure; at the same time, a safety valve is arranged on the outer cover.  6. The multi-function steamer according to claim 5, wherein the latching mechanism is a thread or a buckle.  The multi-function steamer according to claim 1, wherein the boiler body is a double-layer pot wall, and a heat insulating layer is arranged in the middle of the double-layer pot wall to improve the heat preservation effect; the steam nozzle of the boiler body, Eccentric setting for large food placement; steam diffuser at the top of the steam nozzle.  The multi-function steamer according to claim 1, wherein the boiler body has an exhaust device on a side wall thereof, and an automatic throttle valve device for the steamer, and the steam enters the steam boiler. In the initial stage of the body, the air inside the boiler is excluded, and the inside of the boiler is filled with steam. When the steam temperature of the steam outlet of the steamer automatically throttles the exhaust valve device to reach the rated value, the exhaust port is closed.  19. The multi-function steamer according to claim 8, wherein the temperature is rated lower than a boiling temperature of the water of the location.  10. The multi-function steamer according to claim 1, further comprising a control panel having a cooking mode selection button, the cooking mode being a pressure cooker mode or a simmering pan mode.  11. The method for controlling a multifunctional steam boiler according to claim 1, comprising the steps of: a), setting a controller of the steam generator, setting an upper limit first temperature value, being an open circuit; a second temperature value, which is a path; a cooking time setting device for the cooking time setting device;  b), power on, the cooking time setting device starts timing;  c), when the temperature in the body of the boiler reaches a predetermined value, the exhaust device automatically closes and enters the steam cooking stage;  d), in the steam cooking stage, when the steam temperature in the steam relay base device rises to a set first temperature value, the supply of steam is stopped;  e), after the supply of steam is stopped, the temperature starts to decrease, and when the steam temperature in the steam relay base device drops to the set second temperature value, the supply steam is resumed;  f), repeat steps d), e) until the end of cooking.  The control method of the multi-function steamer according to claim 11, wherein the first temperature setting value is greater than a temperature setting value of the exhaust device, and the second temperature setting value is not less than 65 degrees Celsius; The first temperature set value and the second temperature set value define a cooking steam temperature interval. 13. The method of controlling a multi-function steamer according to claim 12, wherein said cooking steam The setting of the temperature interval is automatically performed in the manner of selecting the cooking mode, and is automatically set by the controller of the steam generator according to the default value of the selected cooking mode.