CN1219480C - Automatic Energy Efficient Cooker - Google Patents

Abstract

A dual voltage, energy efficient electronic pressure cooker designed with a thermally insulated cooking vessel, spaced supports on the vessel bottom to prevent food from sticking to the bottom, a unique hinged steamer style handle for sealing and opening the vessel with one hand, and a built-in modem that supports remote manual manipulation or preprogrammed cooking controls by phone or computer. Energy savings are achieved through a dual mode pressure cooking process. The cooking mode is an active heating or steaming for a short but controlled period of time, with heating being interrupted as the liquid in the container reaches a temperature of about 120 ℃ (250F), with the food then being heated to completion in a second cooking mode in which the latent heat from the first cooking mode completes the cooking process without the addition of additional heat.

Description

Automatic Energy Efficient Cooker

Technical field

The present invention relates to pressure cookers, and more particularly, to electronic pressure cookers with an adiabatic cooking mode that can be remotely controlled.

Background technique

The principle of cooking food by steam pressure has been known at least since 1679, when a French physicist, Denis Papin, invented the "Papin cooker", a steamer with an airtight lid with a safety valve, as described in The New British Encyclopedia "in the 15th edition, volume 9 (1993) page 686 described. In 1939, the steamer-type pressure cooker was introduced into mass production by National Presto Industries and became a method of preparing food in a third of the time while maintaining the vitamin and mineral content of the food and preserving the aroma and color of the food. popular method.

Many cookers, including this European invention, are used to cook food in a third to a tenth of the normal time. At the height of its popularity, at least one pressure cooker can be found in most well-equipped kitchens. However, with the advent of fast food restaurants, microwave cookers, and some misconceptions about the safety of pressure cookers, the popularity of this valuable container has declined significantly.

In Europe, Japan, and Korea, researchers have begun developing today's safe, quiet, and stylish stainless steel cookware that can be trusted for preparing tasty, nutritious meals. In Switzerland, for example, according to Barry Bluestein and Kevin Morrissey "Fast Cooking", HP Press, 2000, p. 1, each household has an average of three pressure cookers. With the introduction of electronic models that users can easily program and leave, pressure vessels are currently enjoying a renaissance and are at the forefront of all time-saving devices for food preparation. See page 57 of SHEF's Late Spring 2000 catalog for professional restaurant equipment used by home cooks since 1979.

Focusing on various cookers that plug into electrical outlets for heating purposes, they have features that provide convenience and control of the cooker, features heretofore not present in pressure cookers. For example, US Patent 3908111 describes a detachable inner container of metal or ceramic material that fits inside a main container with a constant temperature electric heating element connected to a fixed metal container with air between the two containers. gap. The main container is used for high-temperature cooking or frying, while the inner container is used for slow cooking or simmering. This provides versatility regardless of energy saving or remote control. Likewise, US Pat. No. 4,591,698 discloses a double-deck instant cooker container for cooking and baking with an outer shell and a removable open inner container, with a retractable power plug.

Other examples of multipurpose electronic cookers include the rice cooker mentioned in US Patent 4315139, which discloses a rice cooker with a detachable cooking pot separate from the heating pot, which has Thermal insulator with timing thermal sensor. U.S. Patent 4,421,974 claims an electric rice cooker with an improved timer, which utilizes "after heat" to continue cooking after the heater is de-energized, thereby providing means for energy saving to effectively convert β- The starch is converted to alpha-starch or "cooked" to produce tasty rice. US Patent 5727448 discloses an inner container and an outer container separated by an insulating vacuum element which prevents heat from escaping during cooking. The energy-saving structure described above is limited to appliances for cooking rice.

Disclose heat insulation cooking container among the U.S. Patent 5031519, and this patent claims a kind of cooking container that has heat insulation cover; A cooking vessel having a vacuum with a close-spaced, controlled vacuum between inner and outer cavities to trigger or passivate the insulating properties of the vessel. Each cooking device has an inner container removably housed in the outer cavity. None of these cooking vessels use a pressure cooker as the inner cavity.

For electronic pressure vessels, US Patent 4587405 discloses an electric heating element with a control circuit allowing preselection of the cooking time. US Patent 5839357 utilizes an electric motor to securely latch the food container and its lid and has means for externally monitoring the internal pressure. None of the electronic pressure vessels described above have the new style steamer style handle to securely latch the cooker. Even though conventional steamer style pressure vessels have two handles, they require two hands to turn one handle clockwise and the other counterclockwise to seal the cooker. The electric pressure cooker is designed with two handles on the container lid and two handles on the bottom of the container which is turned, using two hands, to seal the container in opposite directions. Thus, a pressure cooker having a hinged handle requiring only one hand to operate the locking and unlocking of the container would be easier to use, more efficient to operate and less expensive to manufacture. In addition, the present invention improves the art of pressure cooking by providing remote control and means for energy saving. With the increasing cost of fuel of all types, it would be beneficial to ensure that each container uses the least amount of energy.

Therefore, there is a need for a pressure to safely cook healthy, low-fat meats in record time with minimal monitoring for the ever-increasing number of busy, health-conscious consumers who demand nutritious food and don't want to spend time cooking food Cookers, while ideally, should be energy efficient and touch-sensitive. The present invention provides novel improvements that make safer, quieter electric pressure cookers more efficient, easier to use, and more energy efficient.

An unforeseen and non-obvious result obtained by utilizing the present invention is the production of fully cooked food and simultaneous energy savings during pressure cooking in both modes. Cooking mode one is active heating or steaming, and cooking mode two is allowing the retained heat to complete the cooking process while the pressure cooker returns to ambient conditions.

Contents of invention

A first object of the present invention is to provide an energy-efficient pressure cooker for preparing healthy, nutritious food, which cooks under pressure with minimal heat loss.

A second object of the present invention is to provide a pressure cooking device having an adiabatic cooking mode whereby the required heating time is shortened.

The third object of the present invention is to provide a flexible pressure cooking device whose cooking time can be remotely controlled by telephone or computer.

A fourth object of the present invention is to provide a pressure cooking device which can be operated with 120V or 240V power supply.

A fifth object of the present invention is to provide a steam cooking device having spaced support means or microfeet at the bottom of the food container to prevent the food from sticking to the bottom.

A sixth object of the present invention is to provide a pressure cooking device with controlled heating time so that the food does not over boil, burn or burn at the bottom of the container.

A seventh object of the present invention is to provide a pressure cooking cooker having a single handle for locking and unlocking the cooker.

An eighth object of the present invention is to provide a pressure cooking cooker which revives the interest in and use of pressure cookers.

A ninth object of the present invention is to provide a pressure cooking cooker which promotes a preference for homemade food over fast food.

A tenth object of the present invention is to provide a pressure cooking cooker which facilitates the preparation of food at home.

An eleventh object of the present invention is to provide a pressure cooking cooker which is easy to clean.

In order to achieve the above object, according to the first aspect of the present invention, a two-mode energy-saving pressure cooking device is provided, including:

a) internal pressure cooker containers having an open top and a hinged container handle;

b) an insulated outer container having an open top, an outer wall and an inner wall within which an inner pressure cooker container is housed;

c) a separate cooking lid with a pressure regulating valve for sealing the inner and outer containers;

d) a heater placed within said outer vessel for heating said inner pressure cooker vessel;

e) a temperature sensor disposed within said outer vessel for detecting the temperature of said inner pressure cooker vessel; and

f) means for controlling the heating of the food in a first cooking mode in which the liquid and the food to be cooked are actively heated for a specified time and for switching off the heating of the food in a second cooking mode, in which In the second cooking mode, food is adiabatically heated by retained heat generated in said first cooking mode, without additional heat being supplied from said heater.

Preferably, an insulating space is formed between the inner wall of the outer container and the pressure cooker container.

Preferably, said insulating space contains a vacuum.

Preferably, the insulating space comprises a hard insulating material with a melting point higher than 600°C.

Preferably, a pressure regulating valve inside the cover is adjusted to a value higher than the ambient pressure.

Preferably, the pressure regulator valve in the cap is adjusted to at least 15 pounds per square inch above ambient pressure.

Preferably, the hinged container handle has latching means for latching the lid and container structure to provide a sealed housing.

Preferably, the locking device is a locking pin.

Preferably, said heater placed within said outer container is electrically powered.

Preferably said means for controlling heating comprises a control panel on said insulated outer container for setting a specific active heating cooking time.

Preferably, the control panel is adapted to different heating voltages.

Preferably, the heating voltage is selected from 120V and 240V.

Preferably, the means for controlling heating includes a timer for measuring a cooking time elapsed from the moment when said internal pressure cooker vessel reaches a predetermined minimum cooking temperature, and said means further includes a timer for displaying said elapsed cooking time. The display device of the cooking time.

Preferably said means for controlling heating comprises microprocessor controller means connected to said temperature sensor for determining when the temperature of said internal pressure cooker vessel rises to a predetermined maximum cooking temperature and is used to interrupt heating of said internal pressure cooker vessel to allow initiation of a second cooking mode with no additional heat supplied.

Preferably, circuitry for connection to a computer system is also included.

Preferably said circuitry includes a read only memory chip which recognizes the different tones produced by pressing a key of the phone.

Preferably, the remote control of the cooker is realized by telephone.

Preferably, the telephone is connected to the cooker via an established communication line.

Preferably, the phone is a wireless mobile phone.

Preferably, the remote control of the cooker is realized by personal computer.

Preferably, the circuit is a built-in modem.

According to another aspect, there is provided a method of cooking in an energy-efficient two-mode pressure cooker device according to the first aspect of the invention containing edible food, comprising the steps of:

(a) liquids and food to be cooked are placed in internal pressure cooking vessels;

(b) setting the means for controlling so that the heat generator heats the food in the internal pressure cooking vessel for a specified period of time and interrupts the heating of the food at the end of said specified period of time;

(c) heating liquid and ingredients in the inner pressure cooking vessel with said heat generator;

(d) using a thermal sensor to detect when the liquid in the internal pressure cooker vessel begins to boil;

(e) continuing to heat the liquid and food within said internal pressure cooker container for said specified period of time;

(f) interrupting heating of food within said internal pressure cooker container by said heat generator; and

(g) Allow ingredients in an inner pressure cooker container disposed in an outer insulating container to continue cooking at a temperature derived from heat retained in the inner and outer containers without additional heat being supplied from said heat generator .

Preferably, said step (d) further comprises the step of detecting the temperature of said internal pressure cooker vessel and measuring the elapsed time period from said heating step until the predetermined time for cooking the ingredients has been exhausted, and then Interrupt the heating of the internal pressure cooker container.

Preferably, the step of measuring the elapsed time period is controlled manually.

Preferably, manual control is used to determine the heating time in the range from 1 minute to 40 minutes.

A preferred embodiment of the pressure cooking cooker of the present invention comprises having the inner pressure cooker vessel housed in an outer vessel separated from the inner vessel by hermetically sealing the vacuum space or any rigid insulation having a melting point above 600°C.

The lids for the inner and outer container structures have hinged handles that seal and latch the cooking device and cover a release valve for controlled ventilation therein. Other features of pressure cooking devices include: an automatic timer for starting and stopping heating energy, a high pressure safety valve, a removable heat control element that allows the utensil to be fully submerged for cleaning, a ridged bottom surface ) to prevent sticking, and a dual-position 120V or 240V voltage switch.

Further objects and advantages of the present invention will become apparent from the following detailed description of the preferred embodiment shown in the accompanying drawings.

Description of drawings

1 is a cross-sectional view of an energy-saving electronic pressure cooker with a handle in a locked position and engaged to cover a pressure limiting valve;

Figure 2 is a cross-sectional view of the energy-saving electronic pressure cooker with the handle dropped vertically to the side of the container in the open position;

Figure 3 is an exploded perspective view of the container handle and various components;

Figure 4 is a sectional view of the bottom of the inner vessel and the heating element;

Figure 5A is a top view of a container lid;

5B is a sectional view of the pressure safety valve and an exploded perspective view of various components;

Fig. 6 is a bottom view of the outer container of the energy-saving electronic pressure cooker and a separate view of the detachable double-position 120V/240V voltage switch;

Figure 7 is an exploded perspective view of an internal pressure cooker vessel assembly;

Figure 8 is a perspective view of the inner container, bottom support and housing for the internal modem and electronic controls;

Fig. 9 is a circuit diagram for an electronic control unit and a digital display control board;

Figure 10 is a flow diagram of various control options for a cooker;

Figure 11 is a flow diagram of various cooking time options for a cooker;

Fig. 12 is a schematic diagram of remote control of the energy-saving cooker.

Detailed ways

Before the disclosed embodiments of the invention are explained in detail, it is to be understood that the invention is not limited in application to the specific structural details shown, as the invention also has other embodiments. Also, the terminology used herein is for the purpose of description and not limitation.

Generally, pressure cookers are designed to seal and control the steam that is generated when the water inside the cooker begins to boil. Thus, pressure cookers are constructed of strong and durable materials, such as stainless steel and heavy gauge aluminum, to safely withstand high pressures and temperatures. Pressure cookers also operate at temperatures within the pressure design limits and within their heating and cooling capabilities to affect the characteristics of the food. For example, the design pressure limit is generally one or half an atmospheric pressure unit above ambient pressure. Atmospheric or ambient pressure is 14.7 pounds per square inch (psi) at sea level, or approximately 15 psi; therefore, pressure cookers are designed to withstand pressures from 7.5 psi (low pressure) to 15 psi or more (high pressure). The general design limit is 15 psi above ambient pressure. Functionally, this means that the pressure inside the sealed cooker increases to about 15 pounds above the standard pressure at sea level, raising the boiling point of water from 100°C (212F) to 120°C (250F). This enables food to be cooked in about a third of the normal time, while softening crude fibers and keeping nutrients intact. The higher the pressure design, the higher the cooking temperature achievable and the shorter the cooking time required.

Electric pressure cookers work almost silently with minimal steam loss, as they automatically reach pressure and maintain pressure, and pressure regulator valves automatically vent excess pressure if the design pressure is exceeded. Some models of electronic pressure cookers, including the cooker of the present invention, can be programmed to automatically turn on at a desired time. A further advantage of the present invention results in the pressure cooker container being housed within a thermally insulated outer container. In the first cooking mode, the liquid, usually water, juice or gravy, and the ingredients to be cooked are actively heated for a short but controlled period of time; the heating is discontinuous and the ingredients are heated in the second cooking mode. Cooking until done, in the second cooking mode, the latent heat from the first cooking mode completes the cooking process without additional heat.

Examples of edible foods prepared in this way are pasta, meat, fish, desserts, vegetables, savory stews, cereals, beans and soups. Specific cookbook and container manufacturer's directions should be followed carefully, as the cooking process is unique and rapid.

The new energy efficient pressure cooker disclosed in this invention is connected to an electrical socket which provides heat to the vessel and also powers a modem which allows the cooker to be operated remotely.

FIG. 1 is a sectional view showing an inner container 1 separated from an outer container 2 by a vacuum 3 . Built into the vacuum space adjacent to the inner container wall is a temperature sensor 4 . The container lid 5 is shown with various means for securing the lid to the container, such as a hinge 11 attached to a hinge base 12 with a gasket 13, and a bolt 14 to hold the hinge assembly in place and prevent steam and pressure Leaked out of sealed container. On the opposite side of the container lid is a handle 9 comprising a latch pin 10 and a cover lock 6 to seal and engage the container in the area of the handle connection. The pressure limiting valve 8 is covered by a slot in the handle to prevent inadvertent leakage of pressure. As shown in Figure 1, when the handle is fully engaged or latched, the rim of the container and lid 5 are combined in an airtight manner. The handle is perpendicular to the side of the container and is oriented horizontally with respect to the ground when closed. The timer display 7 and wires 41 are shown along the bottom of the container.

In Figure 2, the handle 29 is shown in the open position. Here, the handle is parallel to the side of the container and is oriented vertically with respect to the ground when unlocked. When the latch release button or switch 20 is engaged, the handle 29 is dropped to the side of the container by moving the handle on the pivot connection 21 connected to the container 22 . During the lowering of the handle 29 the locking pin 23 is released from the container and simultaneously the pressure limiting valve 28 is released. When the handle is disengaged or unlocked, the pressure vessel shall be at or near ambient conditions as shown.

FIG. 3 shows each component of the handle 29 with pivot 36 mounted to the top side of the pressure vessel. A pivot connection 131 is used to connect the handle 29 to the container top. The button 31 is used to depress a lever 32 which engages a spring 33 fitted on a base 34 of the handle. A latch 35 attached to the end of the lever 32 locks or unlocks the top of the container. All parts of the handle 29 are fastened together with bolts 37,38,39.

Figure 4 provides a detailed view of the inner vessel floor and heating elements. The ridged surface, also known as "micro-bumps" 41, acts to prevent food from sticking to the base plate. The ridged surface 41 also positions the food away from the bottom plate so that the food is steamed rather than boiled during cooking. Steaming retains nutrients, aroma and color, while boiling will result in loss of nutrients, aroma and color. The ridged surface or micro-protrusion 41 is about one centimeter above the bottom of the container.

Just below and adjacent to the outer bottom wall of the inner vessel are electrical heating elements 42, 43, 44, 45 and ceramic heating elements 46, 47, 48, 49. The temperature sensor 4 is connected to a thermally insulating ceramic block supporting the electric heating elements 42, 43, 44, 45, forming a closed loop which helps to transmit and receive signals to ensure the cooker is working correctly.

In Fig. 5A, the container hinge base 50 is bracketed to support a pin hinge 51 which is securely attached to the top of the container. The container cover 52 supports a smaller container lid 53 having a button-like handle 54 for easily lifting the lid off the food. The handles 55, 56 also provide a convenient means for lifting the entire appliance. As can be seen from this top view, the handle 57 is shown in the lowered or disengaged position exposing the pivot connection 58 , cover lock 59 and pressure relief valve 5 .

FIG. 5B shows a cross-sectional view of how the pressure relief valve 150 is assembled with a separately drawn valve base 151 . In the exploded view, the pressure valve 155 sits on a flat spring pad 156 with an annular space to hold the block 157 and the spring 158 above the steel ball 159 which sits on the cylindrical block 160 at the center of the cylindrical block 160 There is a leaf spring 161 on the bottom. The spring pad 156 has raised reeds which engage the cylindrical block top 160 where the higher or lower pressure of the cooking vessel can be adjusted. Lever 162 is held in place by pivot 163 . When the lever 162 is in the horizontal position, as shown in Figure 5B, the pressure relief valve opens to relieve the pressure inside the container to ambient pressure. During cooking, the lever 162 must be in a vertical position to lock under pressure. When the lever 162 is lowered to the horizontal position by steam pressure or manual action, the steam is vented to the atmosphere, thereby reducing the pressure within the actively heated internal pressure cooker vessel.

Figure 6 provides a bottom view of the cooker. The container base 60, 61 is made of a malleable, hard plastic such as acrylonitrile-butadiene styrene (ABS). The base bodies 60 , 61 support and fix the outer insulating container 62 and the housing for the control panel 63 . The ceramic block housing 64 is shown with heating elements adapted to different heating voltages. The voltage can be switched to work with 120V in the US, or 240V in Europe and Asia. This means for selecting the desired voltage is shown in switch 65 .

Figures 7 and 8 provide detailed views of the parts and assemblies of the novel pressure cooker. Figure 7 shows a container top 70 including a pressure valve 70a. The container top 70 covers the container rim 71 fitted with a silicon gasket 71a. The handle 73 is connected to the open container rim by a pivot 74 at a pivot connection point 75 . A temperature sensor 76 with copper wires 77 is located on the side wall of the inner vessel 72 . Larger stainless steel bolts 78 connect the bottom of inner vessel 72 to heating element 79 , while pins 80 fit into ceramic block 81 and are held in place by stainless steel nuts 82 . The bottom seal includes a silicon gasket 83 seated within a larger silicon gasket 84 .

In Figure 8, an inner vessel 85 is attached to the vessel rim with stainless steel bolts 86 and in turn mounted to a stainless steel pressure plate 87 seated within the ductile, hard plastic sheet forming the vessel base 88,89. This assembly is held together with a plurality of stainless steel bolts and stainless steel nuts 90 . On the bottom surface of the container base 88, 89 is a detachable and fixed timer 91, which has a liquid crystal display and a controller housing 92, which accommodates a microchip (not shown), a built-in modem (93 ), a serial port 94 for connecting to a computer and a circuit that supplies power and controls the heating and work of the pressure cooker.

FIG. 9 shows the wiring for an electronic control unit 190 with separate lines for a temperature sensor 191 , a 120-240V fiberglass printed circuit (PC) board 192 and a 120-240V switch 193 . The electronic control unit 190 is connected to the digital display unit 97 . The digital display panel is described in detail with examples that follow.

In Fig. 10, a flow chart of how to operate an energy-efficient cooker manually or by telephone remote control on a time-delay program is shown. In manual operation, the user can select the quick food button and the cooker will start on demand. Enter the type of food. Examples of options are Chicken, Pasta, Vegetables, Fish, Stew or Soup. An automatic cooker will cook according to the characteristics of the food; the amount of time it takes to cook is pre-programmed in the cooker's computer chip. When using the time delay program or remote control by phone, the user can delay the completion of food cooking according to a predetermined schedule. Frozen food can be placed directly into the container; and the food will remain cold for a sustained period of time because the container is insulated. The user first decides when the cooking of the food should be finished. Energy saving mode (ESM) is then selected and the cooker will automatically start cooking at two and a half hours plus the time required for the selected food type to cook before the food is fully cooked. At the end of the Eco Mode cycle, a "Keep Warm" cycle will begin.

The following is an example of ESM operation. The current time is 8:00AM, and the food is expected to be ready by 6:00PM, which is 10 hours from now. Referring to Figure 9, after selecting a food type 98, 99, 100, 101 or 102, the "timer" 103 or 104 is turned on and the time the cooker starts will be displayed in the display window. The start time 105 will equal 3:30PM minus the cooking time required for the selected food type. Thus, if the cook time is reordered to be 30 minutes, the start time 105 will be 3:30 PM minus the 30 minute cook time or 3:00 PM. The ready time 106 is 6:00PM.

FIG. 11 is a flow chart for cooking time selection and follows the flow chart of FIG. 10 with respect to decisions or actions taken when manual operation is reselected. Point A shows various food categories with preprogrammed cooking times. The user can select food categories for manual operation or for cycling with the ESM. At point B, the user decides when the food is to be prepared and schedules when to start the cooker. At point C, when Energy Saving Mode (ESM) is selected and the required completion time is less than two and one-half hours, the cooker will ask the user to re-enter a new start time.

An example of telephone remote control operation is shown in FIG. 12 . From a remote location 122 or 123 using established communication lines 121 such as but not limited to the Internet, cable or telephone lines. The communication line 121 is plugged directly into a circuit 124 containing a ROM (read only memory) chip that can distinguish the different tones produced by pressing the keys of the phone. This circuit can be an RS232 or Internet modem 124 . Alternatively, the wireless mobile phone 125 can also be used to operate the cooker if a different tone is generated by pressing the phone key. When the caller connects the circuit with the telephone, the modem interface will send the following information:

1.1 "Welcome to use automatic high-efficiency and energy-saving cookers 126";

1.2 Please enter your access code or password;

1.3 The current starting time is 17:00 or 5:00PM;

1.4 To change the current starting time, please press "0";

1.5 To exit and end this call, please press the pound sign (#);

1.6 To set a new start time, please input the time and then press the # key;

1.7 Please enter program selection:

Chicken or Dough - press "1"

Vegetables - press "2"

Fish - press "3"

Stew - press "4"

Soup - press "5"

1.7 Please press the asterisk (*) key to confirm;

1.8 Press "0" to repeat the above information;

1.9 Press the pound sign (#) key to end.

Communicating with and operating the cooker may be performed at a remote location such as, but not limited to, a personal computer such as an IBM compatible or Macintosh type, a wired or wireless telephone, or similar device capable of establishing a connection to a modem built into the cooker. After the cooker is engaged via the connection to the built-in modem, the procedure for manipulating the cooker is the same as outlined above. Additionally, multiple language options can be programmed in the cooker by connecting a computer to the serial port 95 of the cooker shown in FIG.

While the invention has been described, disclosed, illustrated and illustrated to particular embodiments or modifications assumed in application, the scope of the invention is not limited thereto, nor should it be considered so limited, as set forth herein Other modifications or embodiments suggested by the teaching are also possible without departing from the spirit and scope of the appended claims.

Claims (28)

1. An energy-saving two-mode pressure cooking device comprising: a) internal pressure cooker containers having an open top and a hinged container handle; b) an insulated outer container having an open top, an outer wall and an inner wall within which an inner pressure cooker container is housed; c) a separate cooking lid with a pressure regulating valve for sealing the inner and outer containers; d) a heater placed within said outer vessel for heating said inner pressure cooker vessel; e) a temperature sensor disposed within said outer vessel for detecting the temperature of said inner pressure cooker vessel; and f) means for controlling the heating of the food in a first cooking mode in which the liquid and the food to be cooked are actively heated for a specified time and for switching off the heating of the food in a second cooking mode, in which In the second cooking mode, food is adiabatically heated by retained heat generated in said first cooking mode, without additional heat being supplied from said heater. 2. The energy saving pressure cooking apparatus of claim 1, wherein an insulating space is formed between the inner wall of the outer container and the pressure cooker container. 3. The energy-saving pressure cooking device of claim 2, wherein the insulating space contains a vacuum. 4. The energy-saving pressure cooking device according to claim 2, wherein the insulating space comprises a hard insulating material with a melting point higher than 600°C. 5. Energy-saving pressure cooking device according to any one of claims 1 to 4, characterized in that the pressure regulating valve in the cover is adjusted to a value higher than the external pressure. 6. The energy efficient pressure cooking apparatus of claim 5, wherein the pressure regulator valve in the lid is adjusted to at least 15 pounds per square inch above ambient pressure. 7. An energy efficient pressure cooking apparatus as claimed in any one of claims 1 to 4 wherein the hinged container handle has latch means for locking the lid and container structure to provide a sealed housing. 8. The energy-saving pressure cooking device according to claim 7, wherein the locking device is a locking pin. 9. An energy efficient pressure cooking device according to any one of claims 1 to 4, wherein the heater placed in the outer container is electrically powered. 10. An energy efficient pressure cooking apparatus according to any one of claims 1 to 4, wherein said means for controlling heating comprises a control panel on said insulated outer container for setting Specific active heat cooking times. 11. The energy efficient pressure cooking apparatus of claim 10, wherein the control panel is adapted for different heating voltages. 12. The energy saving pressure cooking cooker of claim 11, wherein the heating voltage is selected from 120V and 240V. 13. The energy-saving pressure cooking cooker according to claim 12, wherein the heating voltage is 120V. 14. The energy-saving pressure cooking cooker according to claim 12, wherein the heating voltage is 240V. 15. An energy efficient pressure cooking cooker as claimed in any one of claims 1 to 4, wherein the means for controlling the heating comprises a timer for measuring the cooking time from the internal pressure cooker vessel to a predetermined minimum cooking time. A cooking time consumed at a temperature moment, and the device further includes display means for displaying the consumed cooking time. 16. An energy efficient pressure cooking cooker as claimed in any one of claims 1 to 4 wherein said means for controlling heating comprises microprocessor controller means connected to said temperature sensor for determining when the temperature of the internal pressure cooker vessel rises to a predetermined maximum cooking temperature during a first cooking mode and for interrupting heating of the internal pressure cooker vessel to allow a second cooking mode without additional heat supply start. 17. The energy efficient pressure cooking apparatus of claim 16, further comprising circuitry for connection to a computer system. 18. The energy efficient pressure cooking device of claim 17, wherein the circuitry includes a read only memory chip that recognizes the different tones produced by pressing a phone key. 19. The energy-saving pressure cooking device according to claim 18, wherein the remote control of the cooker is realized by telephone. 20. The energy efficient pressure cooking apparatus of claim 19, wherein the telephone is connected to the cooker via an established communication line. 21. The energy efficient pressure cooking apparatus of claim 19, wherein the phone is a cordless mobile phone. 22. The energy-saving pressure cooking device according to any one of claims 17-21, characterized in that the remote control of the cooker is realized by a personal computer. 23. The energy efficient pressure cooking device of any one of claims 17-21, wherein the electrical circuit is a built-in modem. 24. A method of cooking in the energy efficient two-mode pressure cooker unit of claim 1 containing an edible food product, comprising the steps of: (a) liquids and food to be cooked are placed in internal pressure cooking vessels; (b) setting the means for controlling so that the heat generator heats the food in the internal pressure cooking vessel for a specified period of time and interrupts the heating of the food at the end of said specified period of time; (c) heating liquid and ingredients in the inner pressure cooking vessel with said heat generator; (d) using a thermal sensor to detect when the liquid in the internal pressure cooker vessel begins to boil; (e) continuing to heat the liquid and food within said internal pressure cooker container for said specified period of time; (f) interrupting heating of food within said internal pressure cooker container by said heat generator; and (g) Allow ingredients in an inner pressure cooker container disposed in an outer insulating container to continue cooking at a temperature derived from heat retained in the inner and outer containers without additional heat being supplied from said heat generator . 25. The method of claim 24, wherein said step (d) further comprises the step of detecting the temperature of said internal pressure cooker vessel and measuring the temperature from said heating step until the temperature of the ingredients used for cooking The elapsed time period after the predetermined time has elapsed, and then the heating of the inner pressure cooker vessel is interrupted. 26. The method of claim 25, wherein the step of measuring the elapsed time period is controlled manually. 27. The method of claim 26, wherein manual control is used to determine the heating time in the range from 1 minute to 40 minutes. 28. A method according to any one of claims 25-27, characterized in that the temperature sensor is set to interrupt the heating after a certain time when the temperature reaches 120°C.

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