cooking utensils

Abstract

The present invention discloses a cooking appliance comprising a heating container, a cover disposed on the heating container, a cooling chamber formed within the cover, and a vacuum pumping structure and a water tank disposed within the cooling chamber. The vacuum pumping structure creates a negative pressure within the cooling chamber, pumping water from the water tank into the cooling chamber, causing the water in the cooling chamber to boil at a low temperature and absorb heat from the heating container. The cooking appliance of the present invention uses negative pressure to lower the boiling point of water, promote water evaporation, enhance the cooling effect, shorten the pressure relief time, and achieve the purpose of rapid pressure relief.

Description

Technical Field

[0001] The present invention belongs to the technical field of household appliances, and in particular relates to a cooking utensil. Background Art

[0002] To adapt to the fast-paced modern lifestyle, current kitchen cooking appliances are becoming increasingly fast and convenient. Electric pressure cookers are widely popular for their rapid cooking speed and minimal nutritional loss. Their time-saving, energy-saving, and convenient features have made them a rapidly growing appliance in the home appliance industry. However, traditional electric pressure cookers often suffer from the inability to quickly open the lid after cooking, preventing immediate enjoyment of the meal. This has become a major concern for users.

[0003] Existing pressure-regulated rice cookers usually use an active pressure relief method to control the pressure in the cooking chamber. The active pressure relief method is that the solenoid valve actively opens the pressure relief port to relieve pressure. However, there are at least the following defects:

[0004] (1) During the operation of the cooking appliance, the solenoid valve is energized for a long time and is controlled by the pressure relief command. That is, the solenoid valve is controlled to maintain pressure or release pressure according to the temperature or pressure in the cooking chamber. This solution requires relatively complex control logic and control procedures, and the solenoid valve needs to be continuously energized each time the pressure is released. This may lead to problems such as high power consumption, complex logic control procedures, single pressure control method and poor reliability.

[0005] (2) During the pressure cooking process, the high temperature and high pressure environment may cause the liquid in the cooking chamber to overflow, and the overflow of the liquid may cause the solenoid valve and the safety valve to stick together, which may cause the pressure in the cooking chamber to exceed the safety pressure or even cause an explosion, which seriously affects the reliability of the product, the personal and property safety of the user, and the user experience.

[0006] Another existing pressure relief method involves adding a small amount of water to the inner lid, which cools the pot through evaporation and phase change, thereby achieving rapid pressure relief. However, this method still presents several issues: the amount of water evaporated is minimal, resulting in a limited cooling effect and no reduction in pressure relief time. Furthermore, users are required to manually add water during the pressure relief phase, which is cumbersome and impacts the user experience.

[0007] Therefore, it is urgent to design a cooking appliance to solve the problem that the above-mentioned cooking appliance cannot quickly release pressure. Summary of the Invention

[0008] In order to solve the problem that the pressure in the cooking appliance cannot be quickly released after pressure cooking is completed, the present invention provides a cooking appliance to solve the problem that the cooking appliance takes a long time to release the pressure.

[0009] To achieve the above-mentioned purpose, the specific technical solution of the cooking appliance of the present invention is as follows:

[0010] A cooking appliance includes a heating container, a cover body provided on the heating container, a cooling cavity formed in the cover body, the cooling cavity being connected to a water tank, and a vacuuming structure provided on the cooling cavity. The vacuuming structure forms a negative pressure in the cooling cavity, pumping water in the water tank into the cooling cavity, causing the water in the cooling cavity to boil at a low temperature and absorb heat from the heating container.

[0011] Furthermore, the water tank and the cooling chamber are connected via a connecting pipe, and a sealing structure is provided on the connecting pipe, so that the cooling chamber forms a closed chamber.

[0012] Furthermore, the sealing structure includes an adsorption member, which is arranged at one end of the connecting pipe. A water supply channel is provided on the adsorption member, which connects the connecting pipe and the water in the water tank; a floating member is movably connected to the outer wall of the connecting pipe, and the floating member and the adsorption member are sealed when they come into contact.

[0013] Furthermore, the adsorption component includes a main body, a groove is provided on the main body, one end of the connecting pipe is connected to the groove, a water hole is provided on the surface of the main body, the water in the water tank flows into the groove through the water hole, so that the water tank and the connecting pipe are connected through the adsorption component.

[0014] Furthermore, the floating member includes a first connecting block, which is connected to a second connecting block; the first connecting block is made of lightweight plastic, and the second connecting block and the adsorption member are made of rubber material.

[0015] Furthermore, the sealing structure includes a second solenoid valve, which is arranged on the connecting pipe between the cooling chamber and the water tank.

[0016] Furthermore, it also includes a shell, the shell and the cover are rotatably connected, an elastic element is provided on the shell, the water tank is provided on the elastic element, the adsorption block is fixed on the bottom of the water tank, and a floating part is provided at one end of the connecting pipe; a push rod is provided on the water tank, and a cam is provided on the cover, and the push rod and the cam rotate relative to each other to cause the adsorption block and the floating part to be adsorbed or separated.

[0017] Furthermore, a first solenoid valve is provided on the cooling chamber, and the first solenoid valve can be connected to the outside.

[0018] Furthermore, a heat sink is provided between the cooling cavity and the heating container, and the heat in the heating container is dissipated through the heat sink.

[0019] Furthermore, a temperature sensor is provided in the heating container for detecting the temperature in the heating container.

[0020] The cooking utensil provided by the present invention has the following advantages:

[0021] (1) Cool the upper cover by evaporative water cooling to shorten the pressure relief time;

[0022] (2) A cooling chamber is provided on the heating container of the cooking utensil, and negative pressure is formed in the cooling chamber, which lowers the boiling point of water, promotes water evaporation, and improves the cooling effect;

[0023] (3) A water tank is provided on the shell of the cooking appliance to provide water for the cooling chamber. The negative pressure method reduces the volume of water required in the cooling chamber, thereby reducing the volume of the entire appliance and improving the user experience.

[0024] (4) During the pressure relief stage, the vacuum structure works to automatically fill the cooling chamber with water, making it convenient for users to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 1 is a schematic structural diagram of a first embodiment of the cooking utensil of the present invention;

[0026] Figure 2 for Figure 1 Middle partial enlarged view;

[0027] Figure 3 This is a schematic structural diagram of the sealing structure in the first embodiment of the cooking utensil of the present invention;

[0028] Figure 4 1 is a schematic structural diagram of a second embodiment of the cooking utensil of the present invention;

[0029] Figure 5 1 is a schematic structural diagram of a cooking utensil in a first state according to a third embodiment of the present invention;

[0030] Figure 6 1 is a schematic structural diagram of the cooking utensil in the second state of the third embodiment of the present invention;

[0031] Figure 7 1 is a schematic structural diagram of a third embodiment of the cooking utensil of the present invention in a third state;

[0032] Figure 8 Flowchart of the control method of the cooking appliance of the present invention.

[0033] Description of the marks in the figure:

[0034] 1. Cover; 2. Shell; 3. Heating container; 4. Heating plate; 5. Inner cover; 6. First solenoid valve; 7. Vacuum pump; 71. One-way valve; 8. Cooling chamber; 9. Sealing structure; 91. Water tank; 92. Connecting pipe; 93. Floating part; 931. First connecting block; 932. Second connecting block; 94. Adsorption part; 941. Main body; 942. Groove; 943. Protrusion; 95. Spring; 96. Push rod; 97. Cam; 10. Second solenoid valve. DETAILED DESCRIPTION

[0035] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of the present invention.

[0036] The technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0037] Please refer to the attached Figure 1 To the attached Figure 8 The cooking appliance of the present invention is described.

[0038] Prior art cooking appliances typically use active pressure relief to control the pressure in the heating container. This involves a solenoid valve actively opening a pressure relief port to release pressure, but this approach has numerous drawbacks. The cooking appliance of the present invention primarily addresses the technical issue of traditional cooking appliances being unable to quickly open the lid after cooking, preventing immediate enjoyment of the meal. After the pressure cooking process is complete, the cooking appliance is immediately cooled and pressure-relieved, allowing the lid to be opened quickly.

[0039] Specifically, the cooking appliance may be an electric pressure cooker, an electric rice cooker, or other cooking appliance that requires pressure for cooking, and no specific limitation is made herein.

[0040] like Figure 1 As shown, the cooking device includes a housing 2 rotatably connected to a lid 1. A heating container 3 is disposed within the housing 2, with a heating plate 4 disposed at the bottom end of the heating container 3. When the lid 1 is engaged with the housing 2, the heating container 3 forms a sealed chamber, exerting pressure on the water within the heating container 3, allowing the water to reach a higher temperature without boiling, thereby accelerating the cooking efficiency of food. To further seal the heating container 3, an inner lid 5 is sealed at the opening of the heating container 3, sealing the heating container 3 to form a closed environment within the heating container 3.

[0041] After the cooking process is completed, in order to allow the user to quickly open the lid 1 and enjoy the food in the heating container 3 and reduce the waiting time for pressure relief, a cooling chamber 8 is set in the lid 1. The cooling chamber 8 is set on the inner cover 5, so that the cooling chamber 8 and the inner cover 5 are in contact, quickly taking away the heat generated on the inner cover 5, and then cooling the heating container 3 to achieve rapid pressure relief of the heating container 3.

[0042] Furthermore, the cooling chamber 8 is connected to a vacuum pumping structure, which can extract the air in the cooling chamber 8 to the outside of the cooling chamber 8, thereby forming a negative pressure in the cooling chamber 8. The negative pressure lowers the boiling point of the liquid in the cooling chamber 8, promotes water evaporation, improves the cooling effect, and shortens the pressure relief time. Specifically, the vacuum pumping structure can be configured as a vacuum pump 7, a vacuum machine, etc., and is not specifically limited here.

[0043] Furthermore, a first solenoid valve 6 is provided on the cover body 1, and the first solenoid valve 6 controls the air pressure in the cooling chamber 8. When the pressure relief process is completed, the first solenoid valve 6 is opened to allow outside air to enter the cooling chamber 8, balance the atmospheric pressure in the cooling chamber 8, and restore the air pressure in the cooling chamber 8 to normal.

[0044] Furthermore, a water tank 91 is provided on the shell 2, and a sealing structure 9 is provided between the water tank 91 and the cooling chamber 8. The sealing structure 9 draws the water in the water tank 91 into the cooling chamber 8, so that the water in the cooling chamber 8 boils at a low temperature under negative pressure conditions and absorbs heat from the surface of the inner cover 5, thereby reducing the temperature in the heating container 3.

[0045] Of course, the water tank 91 can also be set on the cover body 1, as long as it can realize the water tank function, and no specific limitation is made here.

[0046] The sealing structure 9 provided by the present invention is specifically described through the following three embodiments.

[0047] Example 1

[0048] like Figure 2 and Figure 3 As shown, the present invention provides a first embodiment of a sealing structure 9. Sealing structure 9 includes a connecting tube 92. One end of connecting tube 92 communicates with cooling chamber 8, and the other end of connecting tube 92 is inserted into water tank 91. An adsorption member 94 is provided at the bottom end of connecting tube 92 inserted into water tank 91. A floating member 93 is movably connected to the outer wall of connecting tube 92. When water is injected into water tank 91, floating member 93 floats up and down according to the liquid level in water tank 91, moving closer to or farther from adsorption member 94.

[0049] Specifically, the adsorption component 94 is fixedly connected to one end of the connecting pipe 92, and one end of the connecting pipe 92 is communicated with the adsorption component 94, so that the water in the water tank 91 can flow into the connecting pipe 92 through the adsorption component 94, and then flow into the cooling chamber 8, realizing automatic water supply.

[0050] Furthermore, the adsorption member 94 includes a body 941 having a groove 942 formed therein. The groove 942 communicates with one end of the connecting tube 92. A water hole is provided on the end surface of the body 941, through which water in the water tank 91 flows into the groove 942, thereby communicating with the connecting tube 92. The surface of the body 941 is also provided with a plurality of protrusions 943, which increase the adsorption force and thereby provide a tight connection with the floating member 93.

[0051] Furthermore, the floating member 93 includes a first connecting block 931 , a bottom surface of the first connecting block 931 is connected to a second connecting block 932 , and the first connecting block 931 and the second connecting block 932 are integrally formed.

[0052] Preferably, the first connecting block 931 is made of lightweight plastic, and the second connecting block 932 is made of rubber. The overall density of the floating member 93 is less than that of water, allowing it to float on the liquid surface. Depending on the liquid level, the floating member 93 moves up and down within the connecting tube 92, moving away from or closer to the adsorption member 94.

[0053] The cooking appliance provided by the present invention specifically provides a pressure relief method as follows: When the cooking appliance enters the pressure relief stage after cooking, the vacuum mechanism extracts the air from the cooling chamber 8, creating a negative pressure within the cooling chamber 8. This in turn draws water from the water tank 91 through the connecting pipe 92 into the cooling chamber 8. The liquid level within the water tank 91 gradually drops, and the floating member 93 within the water tank 91 moves closer to the adsorbent member 94 as the liquid level decreases. As the water level within the water tank 91 decreases, the second connecting block 932 of the floating member 93 contacts and adsorbs the adsorbent member 94, sealing the connecting pipe 92 and thus creating a sealed environment within the cooling chamber 8. The vacuum level within the cooling chamber 8 increases, lowering the boiling point of the cooling water. The boiling water absorbs heat from the inner cover 5, rapidly lowering the temperature within the heating container 3 and shortening the pressure relief time.

[0054] When the pressure relief is completed, the first solenoid valve 6 opens, and the normal pressure in the cooling chamber 8 is restored. When the cover body 1 is opened, the water in the cooling chamber 8 flows into the water tank 91 through the connecting pipe 92. At this time, the floating part 93 and the adsorption part 94 are separated, and the floating part 93 moves away from the adsorption part 94 as the liquid level rises, thereby realizing the relative movement of the adsorption part 94 and the floating part 93.

[0055] Example 2

[0056] like Figure 4 As shown, the present invention provides a second embodiment of a sealing structure 9, which includes a connecting pipe 92. One end of the connecting pipe 92 is connected to the cooling chamber 8, and the other end of the connecting pipe 92 is inserted into a water tank 91. A second solenoid valve 10 is provided between the connecting pipe 92 in the water tank 91 and the cooling chamber 8. The second solenoid valve 10 controls whether water in the water tank 91 flows into the cooling chamber 8.

[0057] The cooking appliance provided herein specifically implements a pressure relief mechanism as follows: When the cooking appliance enters the pressure relief phase after cooking, the vacuum mechanism extracts the air from the cooling chamber 8, creating a negative pressure within the cooling chamber 8. This in turn draws the water from the water tank 91 into the cooling chamber 8 through the connecting pipe 92. During this pressure relief phase, the second solenoid valve 10 closes, and the water from the water tank 91 is pumped into the cooling chamber 8. When the pressure relief is complete, the first solenoid valve 6 opens, and the second solenoid valve 10 opens simultaneously, restoring the pressure in the cooling chamber 8 to normal. When the lid 1 is opened, the water in the cooling chamber 8 flows through the connecting pipe 92 into the water tank 91.

[0058] Example 3

[0059] like Figures 5 to 7 As shown, the present invention provides a third embodiment of the sealing structure 9 , which includes a connecting pipe 92 , one end of which is connected to the cooling chamber 8 , and the other end of the connecting pipe 92 is inserted into the water tank 91 .

[0060] The bottom of the shell 2 is elastically connected to the water tank 91. Specifically, the bottom of the shell 2 is set as a spring 95, and the other end of the spring 95 is fixedly connected to the bottom of the shell 2. According to the amount of water in the water tank 91, the spring 95 expands and contracts, thereby controlling the vertical setting position of the water tank 91.

[0061] Furthermore, an adsorption member 94 is provided on the bottom surface of the inner wall of the water tank 91. The adsorption member 94 is fixedly provided on the bottom surface of the shell 2 of the water tank 91. The specific shape of the adsorption member 94 is set to a concave shape. Of course, the shape of the adsorption member 94 can also be set to other shapes. No specific limitation is made here, as long as the shapes of the adsorption member 94 and the floating member 93 are matched.

[0062] Furthermore, a floating member 93 is fixedly mounted at one end of the connecting tube 92. The specific shape of the floating member 93 matches that of the suction member 94. Simply by bringing the suction member 94 and the floating member 93 into contact and adsorbing them, the suction member 94 seals the opening of the connecting tube 92. This is not specifically limited to the shapes of the suction member 94 and the floating member 93, as long as they match. Specifically, the suction member 94 and the floating member 93 are made of rubber.

[0063] Furthermore, a hinge shaft is provided on the cover body 1, and a cam 97 is rotatably connected to the hinge shaft. A push rod 96 is fixedly connected to the water tank 91, and a roller is provided on the push rod 96. When the cover body 1 is opened, the cover body 1 rotates relative to the shell 2, and the position of the water tank 91 changes.

[0064] like Figure 5 As shown, when the cover 1 and the shell 2 are in a relatively buckled state, the water tank 91 is filled with water, and the floating member 93 and the adsorption member 94 on the connecting pipe 92 are in a separated state.

[0065] like Figure 6 As shown, when the cover body 1 and the shell body 2 are in a relatively fastened state, the pressure relief stage is started. When the water in the water tank 91 flows into the cooling chamber 8, the water in the water tank 91 decreases. Due to the restoring force of the spring 95, the water tank 91 moves toward the cover body 1, so that the adsorption part 94 and the floating part 93 are adsorbed on each other, so that the cooling chamber 8 forms a closed environment.

[0066] like Figure 7 As shown, when the cover 1 and the shell 2 are in a relatively open state, the cam 97 and the push rod 96 abut against each other, so that the adsorption member 94 and the floating member 93 are separated, so that the water in the cooling chamber 8 flows back into the water tank 91. At this time, the weight of the water tank 91 increases, and it moves away from the cover 1 under the action of the spring 95. At this time, the pressure relief stage is completed, and the water tank 91 returns to Figure 5 The status shown.

[0067] Preferably, a water inlet pipe and a drain pipe are respectively provided on the water tank 91 to facilitate the addition and removal of water from the water tank 91 .

[0068] The cooking appliance provided by the present invention has a specific pressure relief method: when the cooking appliance enters the pressure relief stage after cooking, the vacuum mechanism extracts the air from the cooling chamber 8, creating a negative pressure inside the cooling chamber 8. This in turn draws the water in the water tank 91 into the cooling chamber 8 through the connecting pipe 92. After the adsorbent 94 and the floating member 93 come into contact and adsorb, a sealed environment is formed within the cooling chamber 8. After the pressure relief stage ends, the lid 1 rotates relative to the housing 2, and the hinge shaft drives the cam 97 to rotate. The cam 97, via the push rod 96, moves the water tank 91 away from the lid 1, separating the adsorbent 94 and the floating member 93. The water in the cooling chamber 8 flows along the connecting pipe 92 into the water tank 91.

[0069] Furthermore, a heat sink is provided between the inner cover 5 and the bottom surface of the cooling chamber 8. The heat sink accelerates heat exchange efficiency, thereby rapidly reducing the temperature within the heating container and shortening the pressure relief time. The heat sink can be welded to the inner cover 5 or fixed to the cooling chamber 8, without specific limitation herein.

[0070] Furthermore, in order to more accurately determine the completion of the pressure relief stage, a temperature sensor is provided in the heating container 3, and the temperature sensor further detects the temperature in the heating container 3, thereby judging the end and start of the pressure relief stage.

[0071] The cooking appliance provided by the present invention uses negative pressure to lower the boiling point of water, promoting water evaporation, improving cooling efficiency, and shortening pressure relief time. The water tank 91 has a smaller water capacity. Compared to conventional water cooling methods, only a smaller amount of water needs to be added to the tank 91 each time, reducing the overall size of the appliance and improving the user experience. During the pressure relief phase, the vacuum pump 7 automatically injects water into the lid 1, making operation more convenient for the user.

[0072] like Figure 8 As shown, the present invention also provides a cooking appliance control method, which specifically includes:

[0073] Step S11: Acquire the environmental parameters in the heating container 3.

[0074] Specifically, the detection parameter is to detect the temperature parameter or the pressure parameter in the heating container 3 .

[0075] Step S12: judging whether the heating container 3 meets the pressure relief condition according to the environmental parameters.

[0076] When the temperature parameter in the heating container 3 is preset to be less than 100° C., the pressure relief stage is completed; if the temperature in the heating container 3 is preset to be greater than or equal to 100° C., the pressure relief stage is started.

[0077] Step S13: If the environmental parameters meet the pressure relief conditions, the pressure in the heating container 3 is adjusted.

[0078] When the temperature parameter in the heating container 3 is not less than 100° C., negative pressure is formed in the cooling chamber 8, causing the water in the cooling chamber 8 to boil and absorb heat, thereby reducing the pressure in the heating container 3 and quickly opening the cover 1.

[0079] The control method of a cooking appliance provided by the present invention specifically comprises the following steps: first, obtaining a temperature parameter within the heating container 3 and determining whether the temperature parameter is greater than or equal to 100°C; second, determining whether to enter a pressure relief phase based on the determination result; if the temperature parameter is determined to be greater than or equal to 100°C, then entering the pressure relief phase; if the temperature parameter is determined to be less than 100°C, then not entering the pressure relief phase; finally, after entering the pressure relief phase based on the determination result, the first solenoid valve 6 is continuously closed, and the vacuum pump 7 is activated. At this time, the air within the cooling chamber 8 forms a negative pressure, and the water within the water tank 91 flows into the cooling chamber 8. The water within the cooling chamber 8 boils at a low temperature, removing a large amount of heat through the heat sink. The temperature parameter within the heating container 3 is then continuously detected. If the temperature parameter is determined to be less than 100°C, then the pressure relief phase ends. The vacuum pump 7 stops operating, the first solenoid valve 6 opens, and the water within the cooling chamber 8 flows into the water tank 91, ending the pressure relief phase.

[0080] In the cooking appliance control method provided by the present invention, during the pressure relief phase, vacuum pump 7 operates, automatically injecting cooling water from water tank 91 into cooling chamber 8, creating a negative pressure within cooling chamber 8. Furthermore, cooling chamber 8 is provided with a heat sink to accelerate water evaporation and cooling, reducing pressure relief time and achieving rapid pressure relief. During the pressure relief phase, vacuum pump 7 automatically injects water into cooling chamber 8, facilitating user operation.

[0081] Furthermore, these features and embodiments may be modified to suit specific circumstances and materials under the teachings of the present invention without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are intended to be protected by the present invention.

Claims

1. A cooking utensil, characterized in that: The heating container comprises a cover body provided on the heating container, a cooling chamber formed in the cover body, the cooling chamber being connected to the water tank, and a vacuum pumping structure provided on the cooling chamber. The vacuum pumping structure forms a negative pressure in the cooling chamber, pumping water in the water tank into the cooling chamber, causing the water in the cooling chamber to boil at a low temperature and absorb heat from the heating container; The sealing structure includes a connecting pipe, one end of which is connected to the cooling chamber, and the other end of which is inserted into the water tank. An adsorption member is provided at the bottom end of the connecting pipe inserted into the water tank, and a floating member is movably connected to the outer wall of the connecting pipe. When water is injected into the water tank, the floating member floats up and down according to the liquid level in the water tank, and then moves closer to or away from the adsorption member. The sealing structure forms a closed chamber in the cooling chamber. The adsorption member is provided with a water delivery channel, which connects the connecting pipe with the water in the water tank. The adsorption member includes a body, which is provided with a groove. One end of the connecting pipe is connected to the groove. A water hole is provided on the surface of the body. The water in the water tank flows into the groove through the water hole, thereby connecting the water tank and the connecting pipe through the adsorption member. The floating member and the adsorption member are sealed when they come into contact. or, The cooking appliance further includes a housing, the housing and the cover being rotatably connected, an elastic element being provided on the housing, a water tank being provided on the elastic element, an adsorption element being provided on the bottom surface of the water tank, and a floating element being provided at one end of the connecting pipe; a push rod being provided on the water tank, and a cam being provided on the cover, wherein the push rod and the cam are rotated relative to each other to cause the adsorption element and the floating element to be adsorbed or separated; The sealing structure includes a connecting pipe, one end of which is connected to the cooling chamber, and the other end of which is inserted into the water tank; The bottom of the shell is elastically connected to the water tank. The bottom of the shell is set as a spring. The other end of the spring is fixedly connected to the bottom of the shell. The spring can expand and contract according to the amount of water in the water tank, thereby controlling the vertical position of the water tank. The bottom surface of the inner wall of the water tank is provided with an adsorption member, which is fixedly arranged on the bottom surface of the shell of the water tank; The floating member is arranged at one end of the connecting pipe, and the shapes of the floating member and the adsorption member are adapted to each other so that the adsorption member can close or open the pipe opening of the connecting pipe; The cover is provided with a hinge shaft, a cam is rotatably connected to the hinge shaft, a push rod is connected to the water tank, and a roller is provided on the push rod. When the cover is opened, the cover rotates relative to the shell, and the position of the water tank changes; When the cover and the shell are in relative engagement, the pressure relief stage is started. When the water in the water tank flows into the cooling chamber, the water in the water tank decreases. Due to the restoring force of the spring, the water tank moves toward the cover, so that the adsorption part and the floating part are adsorbed to each other, forming a closed environment in the cooling chamber. When the cover and the shell are in a relatively open state, the cam and the push rod abut against each other, causing the adsorption part and the floating part to separate, and the water in the cooling chamber to flow back into the water tank. At this time, the weight of the water tank increases, and it moves away from the cover under the action of the spring, and the pressure relief stage is completed.

2. The cooking appliance according to claim 1, wherein The floating piece comprises a first connecting block, which is connected to a second connecting block; the first connecting block is made of lightweight plastic, and the second connecting block and the adsorption piece are made of rubber material.

3. The cooking appliance according to claim 1, wherein The sealing structure includes a second solenoid valve, which is arranged on the communication pipe between the cooling chamber and the water tank.

4. The cooking appliance according to claim 1, wherein The cooling chamber is provided with a first electromagnetic valve, which can be communicated with the outside.

5. The cooking appliance according to claim 1, wherein A heat sink is provided between the cooling chamber and the heating container, and the heat in the heating container is dissipated through the heat sink.

6. The cooking appliance according to claim 1, wherein A temperature sensor is provided in the heating container for detecting the temperature in the heating container.

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