Steam generator and air fryer

Abstract

The utility model provides a steam generator and an air fryer, and relates to the technical field of cooking equipment. The steam generator includes: an evaporation tube; the heating pipe and the evaporation pipe are arranged side by side; the switch assembly is connected with the first port of the evaporation pipe; the heating tube is further used for heating the triggering assembly, the triggering assembly can execute triggering action according to the temperature of the triggering assembly, and the triggering action is used for triggering the switch assembly to open the first port.

Description

Technical Field

[0001] The utility model relates to the technical field of cooking equipment, in particular to a steam generator and an air fryer. Background Art

[0002] In order to ensure the softness of cooked food, a steam generator is often installed in the air fryer, so the steam generator needs to occupy space inside the air fryer.

[0003] In the related art, in order to ensure that the liquid has enough space for heating and evaporation, a box-shaped steam generating chamber is often provided on the steam generator. However, the cross-sectional size of the steam generating chamber is large, and the narrow and long space in the air fryer cannot be reasonably utilized, resulting in the size of the air fryer being forced to increase, which is not conducive to the miniaturized design of the air fryer.

[0004] Therefore, how to overcome the above-mentioned technical defects has become a technical problem that needs to be solved urgently. Utility Model Content

[0005] The utility model aims to solve at least one of the technical problems existing in the prior art.

[0006] To this end, a first aspect of the utility model provides a steam generator.

[0007] A second aspect of the utility model provides an air fryer.

[0008] In view of this, the first aspect of the utility model provides a steam generator, which includes: an evaporating tube; a heating tube, which is arranged side by side with the evaporating tube; a switch assembly, which is connected to the first port of the evaporating tube; and a trigger assembly, wherein the heating tube is also used to heat the trigger assembly, and the trigger assembly can perform a trigger action according to its own temperature, and the trigger action is used to trigger the switch assembly to open the first port.

[0009] The present application defines a steam generator, which is applied to an air fryer and can deliver high-temperature steam to the space where food is located during the cooking process, thereby heating and humidifying the food through the high-temperature steam, increasing the heating rate of the food and optimizing the taste of the food.

[0010] Specifically, the steam generator includes an evaporation tube and a heating tube. The working heating tube can transfer heat to the evaporation tube. A steam generation chamber is formed in the evaporation tube, and a first port and a second port are formed at both ends of the evaporation tube. Specifically, liquid enters the steam generation chamber from the first port, and the liquid gradually heats up and vaporizes during the flow process, and finally generates high-temperature steam and is discharged from the evaporation tube from the second port.

[0011] On this basis, the evaporation tube and the heating tube on the heat conducting member are arranged side by side. For example, when a straight tube is selected as the evaporation tube, the heating tube also extends along a straight line and is arranged parallel to the circumference of the evaporation tube. When an arc tube is selected as the evaporation tube, the heating tube also extends along an arc line and is arranged on the inner ring side or the outer ring side of the arc evaporation tube.

[0012] Compared with the technical solution of setting up a box-shaped steam generating chamber and installing a heating element on the outside of the steam generating chamber, the narrow evaporation tube and the heating tube can effectively utilize the narrow space in the air fryer, so as to arrange the evaporation tube and the heating tube without excessively changing the original structural layout and original size of the air fryer, thereby solving the technical problem that the size of the air fryer is forced to increase and is not conducive to the miniaturization design of the air fryer in the related technology. On the other hand, the evaporation tube and the heating tube arranged side by side have a high degree of overlap in the liquid flow direction, which can effectively utilize the heat radiated by the evaporation tube, thereby improving the heating efficiency and heating uniformity of the evaporation tube by the heating tube. Then, the technical effect of optimizing the structural layout of the steam generator, improving the steam output efficiency, reducing the difficulty of arranging the steam generator, and providing convenient conditions for the miniaturization design of the air fryer is achieved.

[0013] Specifically, the steam generator further includes a switch component and a trigger component. The switch component is connected to the first port of the evaporation tube. The switch component can control the switch of the first port by switching its own state. When the first port is opened, liquid can flow into the evaporation tube to start preparing steam. When the first port is closed, the liquid is blocked by the switch component and cannot flow into the evaporation tube.

[0014] The heating tube can also heat the trigger component synchronously during the process of heating the evaporation tube. The trigger component can perform a trigger action according to its own temperature. The trigger action acts on the switch component. Specifically, the switch component can be switched from a closed state to an open state by contacting the switch component, thereby opening the first port of the evaporation tube.

[0015] It can be seen that by setting up a linked trigger component and a switch component, the switch component can automatically open the first port of the evaporation tube after the heating tube is turned on, thereby realizing automatic water supply to the evaporation tube and reducing the possibility of dry burning of the evaporation tube, thereby achieving the technical effect of improving the automation degree of the steam generator and improving the safety and reliability of the steam generator.

[0016] In addition, the air fryer provided by the utility model may also have the following additional technical features:

[0017] In any of the above technical solutions, specifically, the steam generator further includes: a heat conducting member, the evaporating tube and the heating tube are arranged on the heat conducting member, and the trigger assembly is connected to the heat conducting member.

[0018] In any of the above technical solutions, specifically, the steam generator further includes: a heat conducting member, the evaporating tube and the heating tube are arranged on the heat conducting member, and the trigger assembly is connected to the heat conducting member.

[0019] In any of the above technical solutions, specifically, the evaporation tube is a straight tube; the heating tube is parallel to the evaporation tube.

[0020] In any of the above technical solutions, specifically, the evaporation tube is a U-shaped tube, and the heating tube is in a U-shape corresponding to the evaporation tube.

[0021] In any of the above technical solutions, specifically, the evaporation tube is an L-shaped tube, and the heating tube is in an L-shape corresponding to the evaporation tube.

[0022] In any of the above technical solutions, specifically, the evaporation tube and the heating tube are arranged around the trigger component.

[0023] In any of the above technical solutions, specifically, the steam generator further includes: a spoiler, which is arranged in the evaporation tube and is used to spoil the liquid in the evaporation tube.

[0024] In any of the above technical solutions, specifically, the steam generator further includes: a water inlet pipe, connecting the evaporation tube and the switch assembly; the cross-sectional area of ​​at least a part of the water inlet pipe is greater than or equal to 0.7mm 2 , and less than or equal to 12.6mm 2 .

[0025] The first aspect of the utility model provides an air fryer, which includes: a steam generator as in any of the above-mentioned technical solutions; a liquid storage component, connected to the switch component, including a liquid storage cavity; the switch component includes an on state and a off state, in which the switch component connects the liquid storage cavity and the first port in the on state, and blocks the liquid storage cavity and the first port in the off state; wherein the trigger action is used to switch the switch component to the on state.

[0026] In any of the above technical solutions, specifically, the switch assembly includes: a main body, which includes a flow channel, and the flow channel is connected to the evaporation tube; a valve core, which is connected to the main body, and the valve core includes a first position and a second position. When the valve core is in the first position, the valve core blocks the flow channel, and when the valve core is in the second position, the valve core opens the flow channel; wherein the trigger assembly drives the valve core to move to the first position through a triggering action.

[0027] In any of the above technical solutions, specifically, the main body includes: a valve seat; an elastic valve body, which is arranged on the valve seat, and a valve core is arranged on the elastic valve body; a valve cover, which is connected to the valve seat, and the valve cover includes an inlet, the elastic valve body and the valve cover enclose a flow channel, and the valve core blocks or opens the inlet.

[0028] In any of the above technical solutions, specifically, the switch assembly further includes: an elastic portion, connected to the elastic valve body and the valve core, and used to drive the valve core to return to the first position.

[0029] In any of the above technical solutions, specifically, the steam generator also includes a heat-conducting member, and the trigger assembly includes: a driving member connected to the heat-conducting member, and the driving member is at least partially formed of memory metal; a push rod, connected to the driving member, and the deformed driving member pushes the valve core through the push rod.

[0030] In any of the above technical solutions, specifically, the driving member includes: an inner ring connected to the heat conductive member; a memory metal ring sleeved on the circumference of the inner ring and connected to the push rod, and the heated memory metal ring bends toward the direction of the valve core.

[0031] In any of the above technical solutions, specifically, the liquid storage assembly includes: a water tank, which is detachably connected to the valve cover and includes a drain outlet; a sealing valve, which is arranged at the drain outlet; when the water tank is connected to the valve cover, the sealing valve abuts against the valve cover and the sealing valve opens the drain outlet; when the sealing valve is separated from the valve cover, the sealing valve closes the drain outlet.

[0032] Additional aspects and advantages of the present invention will become apparent in the following description or will be understood through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0034] Figure 1 A schematic structural diagram of a steam generator according to an embodiment of the utility model is shown;

[0035] Figure 2 A schematic structural diagram of a steam generator according to an embodiment of the utility model is shown;

[0036] Figure 3 A schematic structural diagram of a steam generator according to an embodiment of the utility model is shown;

[0037] Figure 4 A schematic structural diagram of a steam generator according to an embodiment of the utility model is shown;

[0038] Figure 5 for Figure 4 A partial enlarged view of the steam generator in the illustrated embodiment at region A;

[0039] Figure 6 A schematic structural diagram of a steam generator according to an embodiment of the utility model is shown;

[0040] Figure 7 for Figure 6 A partial enlarged view of the steam generator in the illustrated embodiment at region B;

[0041] Figure 8 A schematic structural diagram of a switch assembly according to an embodiment of the utility model is shown;

[0042] Fig. 9 A schematic structural diagram of a switch assembly according to an embodiment of the utility model is shown;

[0043] Fig.10 A schematic structural diagram of a switch assembly according to an embodiment of the utility model is shown;

[0044] Fig.11 A schematic structural diagram of a switch assembly according to an embodiment of the utility model is shown;

[0045] Fig.12 A schematic diagram of the structure of a trigger assembly according to an embodiment of the utility model is shown;

[0046] Fig.13 A schematic structural diagram of an air fryer according to an embodiment of the utility model is shown;

[0047] Fig.14 A schematic structural diagram of an air fryer according to an embodiment of the utility model is shown;

[0048] Fig.15 A schematic structural diagram of an air fryer according to an embodiment of the utility model is shown;

[0049] Fig.16 for Fig.15 A cross-sectional view of the air fryer in the embodiment shown in the CC direction;

[0050] Fig.17 for Fig.15 A cross-sectional view of the air fryer in the illustrated embodiment along the DD direction;

[0051] Fig.18 A schematic structural diagram of an air fryer according to an embodiment of the utility model is shown;

[0052] Fig.19 A schematic structural diagram of an air fryer according to an embodiment of the utility model is shown;

[0053] Fig. 20 A system block diagram of an air fryer according to an embodiment of the utility model is shown;

[0054] Fig.21 A circuit diagram of a control circuit according to an embodiment of the utility model is shown.

[0055] in, Figures 1 to 21 The corresponding relationship between the reference numerals and component names in the figure is:

[0056] 100 steam generator, 110 heat conducting member, 112 heat conducting rib, 120 evaporation tube, 1202 first port, 1204 second port, 122 spoiler, 130 heating tube, 140 switch assembly, 1402 flow channel, 142 body, 1422 valve seat, 1424 through hole, 1426 valve cover, 1427 inlet, 1428 elastic valve body, 148 valve core, 1482 column, 1484 cover plate, 149 elastic part, 150 trigger assembly, 152 driving member, 1522 inner ring, 1524 memory metal ring, 154 push rod, 160 conduit, 170 liquid storage component, 1702 liquid storage chamber, 172 water tank, 1722 drain outlet, 174 sealing valve, 180 water inlet pipe, 200 air fryer, 210 body, 2102 cooking chamber, 2104 opening, 220 hot air component, 222 motor, 224 fan blades, 226 heating element, 230 container, 240 shell, 300 controller, 301 first switch, 302 fuse, 303 timer, 304 indicator light, 305 second switch, 310 thermostat. DETAILED DESCRIPTION

[0057] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0058] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0059] Refer to the following Figures 1 to 21 A steam generator 100 and an air fryer 200 according to some embodiments of the present invention are described.

[0060] like Figure 1 , Figure 2 and Figure 3As shown, one embodiment of the utility model proposes a steam generator 100, which includes: an evaporation tube 120; a heating tube 130, which is arranged side by side with the evaporation tube 120; a switch assembly 140, which is connected to the first port 1202 of the evaporation tube 120; and a trigger assembly 150. The heating tube 130 is also used to heat the trigger assembly 150. The trigger assembly 150 can perform a trigger action according to its own temperature, and the trigger action is used to trigger the switch assembly 140 to open the first port 1202.

[0061] The present application defines a steam generator 100, which is applied to an air fryer 200 and can deliver high-temperature steam to the space where food is located during the cooking process, thereby heating and humidifying the food through the high-temperature steam, increasing the heating rate of the food and optimizing the taste of the food.

[0062] Specifically, the steam generator 100 includes an evaporation tube 120 and a heating tube 130. The working heating tube 130 can transfer heat to the evaporation tube 120. A steam generation chamber is formed in the evaporation tube 120, and a first port 1202 and a second port 1204 are formed at both ends of the evaporation tube 120. Specifically, liquid enters the steam generation chamber from the first port 1202, and the liquid gradually heats up and vaporizes during the flow process, and finally generates high-temperature steam and is discharged from the evaporation tube 120 from the second port 1204.

[0063] On this basis, the evaporation tube 120 and the heating tube 130 on the heat conducting member 110 are arranged side by side. For example, when a straight tube is selected as the evaporation tube 120, the heating tube 130 also extends along a straight line, and the heating tube 130 is arranged parallel to the circumference of the evaporation tube 120. When an arc tube is selected as the evaporation tube 120, the heating tube 130 also extends along an arc line, and the heating tube 130 is arranged on the inner ring side or the outer ring side of the arc-shaped evaporation tube 120.

[0064] Compared with the embodiment of setting a box-shaped steam generating chamber and installing a heating element outside the steam generating chamber, the narrow and long evaporation tube 120 and the heating tube 130 can effectively utilize the narrow and long space in the air fryer 200, so as to arrange the evaporation tube 120 and the heating tube 130 without excessively changing the original structural layout and original size of the air fryer 200, thereby solving the technical problem that the size of the air fryer 200 is forced to increase and is not conducive to the miniaturization design of the air fryer 200 in the related art. On the other hand, the evaporation tube 120 and the heating tube 130 arranged side by side have a high degree of overlap in the liquid flow direction, and the heat radiated by the evaporation tube 120 can be effectively utilized, thereby improving the heating efficiency and heating uniformity of the heating tube 130 to the evaporation tube 120. In addition, the technical effect of optimizing the structural layout of the steam generator 100, improving the steam output efficiency, reducing the difficulty of arranging the steam generator 100, and providing convenient conditions for the miniaturization design of the air fryer 200 is achieved.

[0065] Specifically, the steam generator 100 further includes a switch assembly 140 and a trigger assembly 150. The switch assembly 140 is connected to the first port 1202 of the evaporation tube 120. The switch assembly 140 can control the switch of the first port 1202 by switching its own state. When the first port 1202 is opened, liquid can flow into the evaporation tube 120 to start preparing steam. When the first port 1202 is closed, the liquid is blocked by the switch assembly 140 and cannot flow into the evaporation tube 120.

[0066] The heating tube 130 can also heat the trigger component 150 synchronously during the process of heating the evaporation tube 120. The trigger component 150 can perform a trigger action according to its own temperature. The trigger action acts on the switch component 140. Specifically, the switch component 140 can be switched from a closed state to an open state by contacting the switch component 140, thereby opening the first port 1202 of the evaporation tube 120.

[0067] It can be seen that by setting the linked trigger component 150 and the switch component 140, the switch component 140 can automatically open the first port 1202 of the evaporation tube 120 after the heating tube 130 is turned on, thereby realizing automatic water supply to the evaporation tube 120 and reducing the possibility of dry burning of the evaporation tube 120, thereby achieving the technical effect of improving the automation degree of the steam generator 100 and improving the safety and reliability of the steam generator 100.

[0068] like Figure 1 , Figure 2 and Figure 3 As shown, in the above embodiment, the steam generator 100 also includes: a heat conductive member 110, the evaporating tube 120 and the heating tube 130 are arranged on the heat conductive member 110, and the trigger assembly 150 is connected to the heat conductive member 110; a heat conductive rib 112, which is connected to the evaporating tube 120 and the heating tube 130 and is located between the evaporating tube 120 and the heating tube 130.

[0069] In this embodiment, the steam generator 100 further includes a heat conductor 110, and the evaporation tube 120 and the heating tube 130 are both arranged on the heat conductor 110. The heat conductor 110 can play a role of positioning and supporting on the one hand, and can transfer heat on the other hand. The working heating tube 130 can transfer heat to the evaporation tube 120 through the heat conductor 110. The trigger assembly 150 is connected to the heat conductor 110. After the heating tube 130 is turned on, the heat can also be transferred to the trigger assembly 150 through the heat conductor 110. During the gradual heating of the heat conductor 110, the trigger assembly 150 can perform a triggering action according to the temperature of the heat conductor 110.

[0070] There is a gap between the evaporation tube 120 and the heating tube 130 arranged side by side, and a heat conducting rib 112 connecting the evaporation tube 120 and the heating tube 130 is arranged in the gap, that is, the heat conducting rib 112 is arranged side by side between the evaporation tube 120 and the heating tube 130. After the heating tube 130 is turned on, part of the heat can be directly transferred to the evaporation tube 120 through the heat conducting rib 112, so that the evaporation tube 120 is heated quickly.

[0071] It can be seen that by arranging the heat conductive rib 112 between the evaporation tube 120 and the heating tube 130 , the heat exchange rate between the heating tube 130 and the evaporation tube 120 can be increased, thereby improving the steam preparation efficiency of the steam generator 100 and reducing the heat loss of the heating tube 130 .

[0072] Specifically, the casing of the evaporation tube 120, the heat conducting rib 112 and the heating tube 130 is an integrated structure, and a metal material with good thermal conductivity can be selected to integrally form the evaporation tube 120, the heat conducting rib 112 and the heating tube 130. This can reduce the assembly complexity of the steam generator 100 and optimize the processing technology of the steam generator 100.

[0073] like Figure 1 , Figure 2 and Figure 3 As shown, in any of the above embodiments, the evaporation tube 120 is a straight tube; the heating tube 130 is parallel to the evaporation tube 120 .

[0074] In this embodiment, the evaporation tube 120 is a straight tube, and the heat conduction tube extends in a straight direction. After assembly, the heat conduction tube is arranged in parallel around the evaporation tube 120 .

[0075] Selecting a straight tube as the evaporation tube 120 can, on the one hand, reasonably utilize the narrow and long space of the air fryer 200. For example, the evaporation tube 120 and the straight tube can be horizontally arranged in the air fryer 200. On the other hand, compared with a curved tube, the possibility of heat concentration on a high-temperature straight tube is lower, which can reduce the possibility of liquid boiling in the evaporation tube 120. On the other hand, the straight tube has a small flow resistance to liquid and steam, and can continuously and stably output high-temperature steam. Thereby achieving the technical effect of improving the steam preparation rate and steam preparation stability.

[0076] In any of the above embodiments, the evaporation tube 120 is a U-shaped tube, and the heating tube 130 is in a U-shape corresponding to the evaporation tube 120 .

[0077] In this embodiment, the evaporation tube 120 is a U-shaped tube, and the heating tube 130 is in a U-shape corresponding to the U-shaped tube. Selecting the U-shaped tube as the evaporation tube 120 can reduce the size of the evaporation tube 120 in the longitudinal direction without reducing the flow distance, thereby rationally utilizing the local space in the steam generator 100 and providing convenient conditions for the miniaturization design of the steam generator 100. At the same time, the U-shaped tube and the U-shaped heating tube 130 arranged side by side can concentrate heat in a smaller area, which can improve the heating efficiency of the heating tube 130 on the evaporation tube 120 on the one hand, and improve the temperature measurement accuracy of the evaporation tube 120 on the other hand.

[0078] In any of the above embodiments, the evaporation tube 120 is an L-shaped tube, and the heating tube 130 is in an L-shape corresponding to the evaporation tube 120 .

[0079] In this embodiment, the evaporation tube 120 is an L-shaped tube, and the heating tube 130 is in an L-shape corresponding to the L-shaped tube. In the case that the internal space of the steam generator 100 is insufficient to arrange a long straight tube, the L-shaped tube can be selected as the evaporation tube 120 to reduce the size occupied by the evaporation tube 120 in the longitudinal direction, thereby reasonably utilizing the internal space of the steam generator 100 and providing convenient conditions for the miniaturization design of the steam generator 100.

[0080] In any of the above embodiments, the evaporation tube 120 and the heating tube 130 are disposed around the trigger component 150 .

[0081] In this embodiment, the evaporation tube 120 and the heating tube 130 are arranged around the trigger assembly 150. This structure can improve the heating efficiency of the heating tube 130 on the trigger assembly 150, so that the temperature value of the trigger assembly 150 approaches the temperature value of the evaporation tube 120, and reduce the adverse effect of the temperature difference between the evaporation tube 120 and the trigger assembly 150 on the trigger timing. At the same time, the evaporation tube 120 and the heating tube 130 are arranged around the trigger assembly 150 to improve the compactness of the structure of the steam generator 100, providing convenient conditions for the miniaturization design of the steam generator 100.

[0082] like Figure 1 , Figure 2 and Figure 3 As shown, in any of the above embodiments, the steam generator 100 further includes: a conduit 160 connected to the second port 1204 of the evaporation tube 120 .

[0083] In this embodiment, the steam generator 100 further includes a conduit 160, a first end of which is connected to the second port 1204 of the evaporation tube 120, and a second end of the conduit 160 is used to guide the high-temperature steam to the target area. For example, when the steam generator 100 is applied to the air fryer 200, the second end of the conduit 160 extends to the top opening 2104 of the frying tub to ensure that the high-temperature steam can be poured into the frying tub and act on the food.

[0084] Specifically, the length and shape of the conduit 160 are adjusted according to the internal structural layout of the air fryer 200, and this embodiment does not impose a rigid limitation.

[0085] Specifically, in the extension direction of the conduit 160, the conduit 160 is divided into a first section and a second section, wherein the first end of the first section is connected to the second port 1204 of the evaporation tube 120, and the second end of the first section is connected to the first end of the second section, the first section is a curved section for adjusting the flow direction of the high-temperature steam, and the second section is a straight section for conveying the high-temperature steam in the first direction.

[0086] After the steam generator 100 is assembled to the air fryer 200, the first direction coincides with the height direction of the air fryer 200, that is, the high-temperature steam flows from top to bottom to the cooking cavity 2102. On this basis, the evaporation tube 120 is arranged on the top of the heating tube 130 to reduce the heat loss of the heating tube 130 and improve the heating efficiency of the heating tube 130 on the evaporation tube 120.

[0087] like Figure 3 As shown, in any of the above embodiments, the steam generator 100 further includes: a spoiler 122 disposed in the evaporation tube 120 for spoiling the liquid in the evaporation tube 120 .

[0088] In this embodiment, a spoiler 122 is provided in the evaporation tube 120, and the spoiler 122 can disturb the liquid flowing in the evaporation tube 120 to improve the vaporization efficiency of the liquid in the evaporation tube 120, thereby achieving the technical effect of improving the high-temperature steam preparation rate.

[0089] like Figure 3 As shown, in any of the above embodiments, the spoiler 122 is a coil spring.

[0090] In this embodiment, the spoiler 122 is a coil spring, which is clamped on the inner side of the evaporation tube 120 , and the extension direction of the coil spring is consistent with that of the evaporation tube 120 .

[0091] On the one hand, the coil spring can disturb the flowing liquid, so that the liquid is quickly heated to a steam state. On the other hand, the coil spring has a small flow resistance to liquid and steam, which can reduce the adverse effect of the spoiler 122 on the steam flow rate while accelerating the steam preparation efficiency.

[0092] like Fig.10 and Fig.11 As shown, in any of the above embodiments, the steam generator 100 further includes: a water inlet pipe 180, connecting the evaporation tube 120 and the switch assembly 140; the cross-sectional area of ​​at least a portion of the water inlet pipe 180 is greater than or equal to 0.7 mm 2 , and less than or equal to 12.6mm 2 .

[0093] In this technical solution, the steam generator 100 is further provided with a water inlet pipe 180, which connects the evaporation tube 120 and the switch assembly 140. When the valve core 148 is in the second position, the switch assembly 140 can supply water to the evaporation tube 120 through the water inlet pipe 180.

[0094] On this basis, the cross-sectional area of ​​at least part of the water inlet pipe 180 needs to be greater than or equal to 0.7 mm 2 , and less than or equal to 12.6mm 2 By limiting the cross-sectional area of ​​at least a portion of the water inlet pipe 180 within the above-mentioned size range, the water in the evaporation pipe 120 can be completely evaporated by limiting the flow rate and flow velocity of the liquid in the water inlet pipe 180, thereby preventing the evaporation pipe 120 from spraying out unevaporated liquid.

[0095] On this basis, by fully evaporating the liquid, excessive scale accumulation in local areas of the evaporation tube 120 can be avoided, thereby reducing the possibility of blockage problems in the small-sized evaporation tube 120 and achieving the technical effect of extending the service life of the steam generator 100.

[0096] like Figure 1 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, one embodiment of the utility model provides an air fryer 200, which includes: the steam generator 100 in any of the above embodiments; a liquid storage component 170, which is connected to the switch component 140 and includes a liquid storage chamber 1702; the switch component 140 includes an on state and a off state, in which the switch component 140 connects the liquid storage chamber 1702 and the first port 1202, and in which the switch component 140 blocks the liquid storage chamber 1702 and the first port 1202; wherein the trigger action is used to switch the switch component 140 to the on state.

[0097] In this embodiment, the steam generator 100 further includes a liquid storage assembly 170 , which is connected to the switch assembly 140 , and a liquid storage cavity 1702 for storing liquid is formed in the liquid storage assembly 170 .

[0098] On this basis, the switch assembly 140 has an on state and a off state. When the switch assembly 140 is in the on state, the first port 1202 is open, and the liquid in the liquid storage chamber 1702 can flow into the evaporation tube 120 through the switch assembly 140 to start preparing steam. When the switch assembly 140 is in the off state, the first port 1202 is closed, and the liquid is blocked in the switch assembly 140 and cannot flow into the evaporation tube 120.

[0099] The trigger component 150 is connected to the heat conductor 110. After the heating tube 130 is turned on, the heat can also be transferred to the trigger component 150 through the heat conductor 110. In the process of the heat conductor 110 gradually heating up, the trigger component 150 can perform a trigger action according to the temperature of the heat conductor 110. The trigger action acts on the switch component 140. Specifically, the switch component 140 can be switched from a closed state to an open state by contacting the switch component 140, thereby opening the first port 1202 of the evaporation tube 120.

[0100] It can be seen that by setting the linked trigger component 150 and the switch component 140, after the heating tube 130 is turned on, the switch component 140 can automatically open the first port 1202 of the evaporation tube 120, thereby realizing automatic water supply to the evaporation tube 120, reducing the possibility of dry burning of the evaporation tube 120, and further achieving the technical effect of improving the automation degree of the steam generator 100 and improving the safety and reliability of the steam generation chamber.

[0101] like Figure 8 , Fig. 9 , Fig.10 and Fig.11 As shown, in any of the above embodiments, the switch assembly 140 includes: a main body 142, the main body 142 includes a flow channel 1402, and the flow channel 1402 is connected to the evaporation tube 120; a valve core 148 is connected to the valve body, the valve core 148 includes a first position and a second position, when the valve core 148 is in the first position, the valve core 148 blocks the flow channel 1402, and when the valve core 148 is in the second position, the valve core 148 opens the flow channel 1402; wherein the trigger assembly 150 drives the valve core 148 to move to the first position through a triggering action.

[0102] In this embodiment, the switch assembly 140 includes a body 142 and a valve core 148. The body 142 encloses a flow channel 1402, which is communicated with the first port 1202 of the evaporation tube 120. Specifically, the flow channel 1402 and the evaporation tube 120 can be connected through a liquid pipeline.

[0103] On this basis, the body 142 is provided with a valve core 148. Relative to the body 142, the valve core 148 has a first position and a second position. When the valve core 148 is in the first position, the valve core 148 blocks the flow channel 1402, and the liquid in the liquid storage chamber 1702 is blocked by the valve core 148 and cannot enter the flow channel 1402. When the valve core 148 is in the second position, the valve core 148 opens the flow channel 1402, and the liquid can flow into the evaporation tube 120 through the flow channel 1402.

[0104] After the electric heating pipe is turned on, the heat conducting member 110 triggers the assembly 150 to heat up along with the electric heating pipe, and the trigger assembly 150 performs a triggering action, which can push the valve core 148 to the second position, so that the flow channel 1402 is automatically opened after the heating pipe 130 is turned on, thereby realizing automatic water supply of the steam generator 100 and avoiding the dry burning problem of the evaporation pipe 120. In this way, the technical effect of improving the automation degree of the steam generator 100 and improving the safety and reliability of the steam generator 100 is achieved.

[0105] At the same time, compared with the embodiment of independently controlling the switch assembly 140 according to the control instruction, the switch assembly 140 that automatically operates by temperature has stronger reliability and is not affected by circuit failures, which can further improve the safety and reliability of the steam generator 100.

[0106] like Figure 8 , Fig. 9 , Fig.10 and Fig.11 As shown, in any of the above embodiments, the main body 142 includes: a valve seat 1422; an elastic valve body 1428, which is arranged on the valve seat 1422, and a valve core 148 is arranged on the elastic valve body 1428; a valve cover 1426, which is connected to the valve seat 1422, and the valve cover 1426 includes an inlet 1427, the elastic valve body 1428 and the valve cover 1426 enclose the flow channel 1402, and the valve core 148 blocks or opens the inlet 1427.

[0107] In this embodiment, the body 142 includes a valve seat 1422, a valve cover 1426, and an elastic valve body 1428. The elastic valve body 1428 is arranged on the valve seat 1422, and the valve cover 1426 connected to the valve seat 1422 presses the elastic valve body 1428 on the valve seat 1422 to prevent the elastic valve body 1428 from loosening or misaligning between the valve cover 1426 and the valve seat 1422. The flow channel 1402 is enclosed between the elastic valve body 1428 and the valve cover 1426, one end of the flow channel 1402 is communicated with the inlet 1427 on the valve cover 1426, the other end of the flow channel 1402 is located in the elastic valve body 1428, and the other end of the flow channel 1402 is communicated with the first port 1202 of the evaporation tube 120. Specifically, the elastic valve body 1428 and the evaporation tube 120 can be connected through a liquid pipeline.

[0108] On this basis, a valve core 148 is provided on the elastic valve body 1428, and a through hole 1424 is provided on the valve seat 1422, and the valve core 148 is exposed in the through hole 1424. Relative to the valve seat 1422, the valve core 148 has a first position and a second position. When the valve core 148 is in the first position, the valve core 148 blocks the inlet 1427 on the valve cover 1426, and the liquid in the liquid storage chamber 1702 is blocked by the valve core 148 and cannot enter the flow channel 1402. When the valve core 148 is in the second position, the valve core 148 opens the inlet 1427 on the valve cover 1426, and the liquid can enter the flow channel 1402 through the inlet 1427 and finally flow into the evaporation tube 120.

[0109] like Figure 5 and Figure 7 As shown, in any of the above embodiments, the switch assembly 140 further includes: an elastic portion 149 connected to the valve body and the valve core 148, and used to drive the valve core 148 to return to the first position.

[0110] In this embodiment, the switch assembly 140 includes an elastic portion 149, and the valve core 148 is connected to the valve body through the elastic portion 149. When the trigger assembly 150 pushes the valve core 148 to move through the triggering action, the elastic portion 149 is deformed and accumulates elastic potential energy. After the steam preparation is completed, the trigger assembly 150 no longer applies the triggering action to the valve core 148, and the elastic portion 149 releases the elastic potential energy to reset the valve core 148 to the first position, thereby realizing the automatic reset of the valve core 148 to prevent the liquid in the liquid storage cavity 1702 from pouring into the cooking cavity 2102.

[0111] It can be seen that by providing the elastic part 149 and the trigger assembly 150, the valve core 148 can be automatically switched on and off along with the start and stop of the steam preparation process, thereby realizing fully automatic water supply and eliminating the need for complex electric control mechanisms and reset transmission mechanisms. This achieves the technical effect of optimizing the structure of the steam generator 100, improving the safety and reliability of the steam generator 100, and reducing the complexity of the structure of the steam generator 100.

[0112] like Figure 5 and Figure 7 As shown, in any of the above embodiments, the valve core 148 includes: a column 1482, which is penetrated through the inlet 1427 and connected to the elastic portion 149; and a cover plate 1484, which is connected to the end of the column 1482 and is located on the side of the inlet 1427 away from the valve body.

[0113] In this embodiment, the valve core 148 includes a column 1482 and a cover plate 1484. The column 1482 is inserted into the inlet 1427, and the first end of the main body passes through the outside of the inlet 1427. The cover plate 1484 is connected to the first end of the column 1482. The second end of the column 1482 is opposite to the through hole 1424 on the valve seat 1422, so that the trigger assembly 150 can push the column 1482 to the second position by contacting the second end of the column 1482.

[0114] Specifically, when the valve core 148 is in the first position, the cover plate 1484 covers the outside of the inlet 1427, and the pressure exerted by the liquid on the cover plate 1484 causes the cover plate 1484 to be pressed tightly against the inlet 1427, thereby achieving sealing with the help of the pressure of the liquid, thereby achieving the technical effect of improving the sealing reliability of the valve core 148. After the heating tube 130 is turned on, the trigger assembly 150 pushes the column 1482 to lift the cover plate 1484, and the liquid can then enter the flow channel 1402 through the gap between the column 1482 and the inlet 1427.

[0115] like Figure 5 , Figure 7 and Fig.12 As shown, in any of the above embodiments, the trigger assembly 150 includes: a driving member 152 connected to the heat-conducting member 110, and the driving member 152 is at least partially formed of memory metal; a push rod 154, connected to the driving member 152, and the deformed driving member 152 pushes the valve core 148 through the push rod 154.

[0116] In this embodiment, the trigger assembly 150 includes a driving member 152 and a push rod 154. The driving member 152 is connected to the heat conducting member 110, and at least a portion of the driving member 152 is formed of a memory metal, which has the property of changing shape with temperature. After the heating tube 130 is turned on, the heat is transferred to the driving member 152 via the heat conducting member 110, and the driving member 152 changes shape during the heating process, thereby driving the push rod 154 on the driving member 152 to perform the triggering action.

[0117] Specifically, when the temperature of the driving member 152 is less than or equal to the first temperature threshold, the driving member 152 is in the first state, and the push rod 154 is separated from the second end of the valve core 148. At this time, the valve core 148 is kept in the first position under the action of the elastic part 149, that is, the switch assembly 140 is in the closed state. When the temperature of the driving member 152 rises to the second temperature threshold, the driving member 152 changes to the second state. During this deformation process, the push rod 154 contacts and pushes the second end of the valve core 148, so that the cover plate 1484 can be lifted up, thereby opening the inlet 1427 on the valve cover 1426.

[0118] It can be seen that the driving member 152 in this embodiment can adjust its shape according to the temperature of the heat-conducting member 110, so as to cooperate with the push rod 154, the valve core 148, the cover plate 1484 and the elastic part 149 to realize the automatic opening and closing of the inlet 1427, ensuring that the inlet 1427 can be automatically opened after the heating pipe 130 starts working, and automatically closed after the heating pipe 130 stops working, so as to ensure that the supply of liquid can match the start and stop of the steam preparation process. At the same time, compared with the embodiment in which the valve core 148 is driven by the electric control mechanism, the use of memory metal can reduce the structural complexity of the steam generator 100 and reduce the cost of the steam generator 100.

[0119] like Fig.12 As shown, in any of the above embodiments, the driving member 152 includes: an inner ring 1522 connected to the heat conductive member 110; a memory metal ring 1524, which is sleeved on the circumference of the inner ring 1522 and connected to the push rod 154, and the heated memory metal ring 1524 is bent toward the direction of the valve core 148.

[0120] In this embodiment, the driving member 152 includes an inner ring 1522 and a memory metal ring 1524. The inner ring 1522 is made of non-memory metal material, that is, the shape of the inner ring 1522 does not change with the temperature. The inner ring 1522 is connected to the heat conductor 110, and the inner ring 1522 can be fixed to the heat conductor 110 by screws. Selecting the inner ring 1522 made of non-metallic material can ensure the positioning stability of the driving member 152 on the heat conductor 110, and prevent the driving member 152 from loosening or even falling off after frequent changes in shape.

[0121] The memory metal ring 1524 is sleeved around the inner ring 1522, and the push rod 154 is connected to the memory metal ring 1524. After the heating tube 130 is turned on, the heated memory metal ring 1524 tilts toward the direction of the valve core 148, thereby driving the push rod 154 to swing toward the direction of the valve core 148, and finally the valve core 148 is pushed to the second position by the push rod 154 to prevent the evaporation tube 120 from burning dry. Correspondingly, after the heating tube 130 is turned off, the temperature of the memory metal ring 1524 drops, the memory metal ring 1524 returns to a flat state, and the push rod 154 connected thereto moves away from the valve core 148. The valve core 148 automatically returns to the first position under the action of the elastic part 149 and the liquid pressure to prevent the liquid from directly pouring into the cooking chamber 2102.

[0122] like Fig.15 , Fig.16 and Fig.17As shown, in any of the above embodiments, the liquid storage assembly 170 includes: a water tank 172, which is detachably connected to the valve cover 1426 and includes a drain port 1722; a sealing valve 174, which is arranged at the drain port 1722; when the water tank 172 is connected to the valve cover 1426, the sealing valve 174 abuts against the valve cover 1426, and the sealing valve 174 opens the drain port 1722; when the sealing valve 174 is separated from the valve cover 1426, the sealing valve 174 closes the drain port 1722.

[0123] in, Fig.16 The arrows in the diagram show the direction of flow of liquid and vapor.

[0124] In this embodiment, the liquid storage assembly 170 includes a water tank 172 and a sealing valve 174. A liquid storage chamber 1702 is formed in the water tank 172. A drain port 1722 is provided at the bottom of the water tank 172. The sealing valve 174 is installed in the drain port 1722. A mounting position is provided on the valve cover 1426. When the water tank 172 is assembled to the mounting position, the valve cover 1426 lifts the sealing valve 174 to automatically open the drain port 1722, and the liquid in the water tank 172 can flow to the inlet 1427. Conversely, after the water tank 172 is removed from the valve cover 1426, the sealing valve 174 is automatically reset to the closed position by the spring to block the drain port 1722, thereby preventing the liquid in the water tank 172 from leaking.

[0125] like Fig.13 , Fig.14 and Fig.15 As shown, one embodiment of the utility model provides an air fryer 200, which includes: a body 210, including a cooking cavity 2102; a steam generator 100 as in any of the above embodiments, which is arranged on the body 210, and the second port 1204 of the evaporation tube 120 is connected to the cooking cavity 2102.

[0126] In this embodiment, an air fryer 200 provided with the steam generator 100 in any of the above embodiments is proposed. Therefore, the air fryer 200 has the advantages possessed by the steam generator 100 in any of the above embodiments, and can achieve the technical effects that can be achieved by the steam generator 100 in any of the above embodiments. To avoid repetition, it will not be described here.

[0127] On this basis, the air fryer 200 further includes a body 210, which is the main frame structure of the air fryer 200 and is used to position and support other structures on the air fryer 200. The steam generator 100 is installed on the body 210. A cooking cavity 2102 is formed in the air fryer 200, and the second port 1204 of the evaporation tube 120 is connected to the cooking cavity 2102 through the conduit 160, so that high-temperature steam can be transported into the cooking cavity 2102, thereby heating and humidifying food through high-temperature steam to increase the heating rate of food, soften food, and avoid the problem of surface cracking and woody taste of food.

[0128] like Fig.13 As shown, in any of the above embodiments, the air fryer 200 also includes: a hot air component 220, which is disposed on the body 210 and is used to blow high-temperature airflow to the cooking cavity 2102.

[0129] In this embodiment, the air fryer 200 further includes a hot air component 220, which is disposed on the body 210 and is disposed opposite to the cooking cavity 2102. The turned-on hot air component 220 can blow high-temperature airflow to the cooking cavity 2102 to quickly heat the surface of the food through the high-temperature airflow.

[0130] like Fig.13 As shown, in any of the above embodiments, the hot air assembly 220 includes: a motor 222 disposed on the body 210; a fan blade 224 connected to the motor 222; and a heating element 226 disposed on the body 210 for heating the fan blade 224.

[0131] In this embodiment, the hot air assembly 220 includes a motor 222, a fan blade 224 and a heating element 226. The motor 222 is fixed to the machine body 210. The fan blade 224 is connected to the rotating shaft on the motor 222. After the motor 222 is turned on, the fan blade 224 rotates along with the rotating shaft to form an airflow to the cooking cavity 2102. The heating element 226 is arranged around the fan blade 224. The turned-on heating element 226 can heat the fan blade 224 to blow out a high-temperature airflow through the high-temperature fan blade 224.

[0132] like Fig.13 , Fig.14 , Fig.18 and Fig.19 As shown, in any of the above embodiments, the body 210 includes an opening 2104 communicating with the cooking cavity 2102 , and the air fryer 200 further includes: a container 230 embedded in the opening 2104 ; and a shell 240 , which is covered outside the body 210 .

[0133] In this embodiment, the machine body 210 is further formed with an opening 2104 communicating with the cooking cavity 2102, and the container 230 is retractably disposed in the opening 2104, so that the user can store and take out food. During the cooking process, the user can pull out the container 230 and turn over or stir the food to ensure that the entire surface of the food can be heated by the hot air and high-temperature steam.

[0134] The housing 240 is disposed outside the machine body 210, and the housing 240 can protect other structures such as the steam generator 100 and the hot air assembly 220. At the same time, the housing 240 can shield the heating pipe 130 to prevent the user from being burned by accidentally triggering the heating pipe 130.

[0135] Fig. 20 The system block diagram of the air fryer 200 is shown. During operation, the heated evaporator tube 120 can transfer heat to the trigger component 150 and the switch component 140 through the heat conductor 110. The trigger component 150 switches the switch component 140 to an on state through a triggering action. The water in the liquid storage component 170 can enter the evaporator tube 120 through the switch component 140 under the action of gravity, and is discharged into the cooking chamber 2102 after being heated into high-temperature steam by the evaporator tube 120.

[0136] The controller 300 includes a control circuit, and the control circuit is used to control the operation of the steam generator 100 and the hot air assembly 220.

[0137] Specifically, Fig.21 As shown, in the control circuit, the steam generator 100 is connected in parallel with the motor 222 and the heating element 226 in the hot air assembly 220, and then connected in series with the timer 303, the fuse 302 and the first switch 301 as a whole. A second switch 305 connected in series with the steam generator 100 can be set for the user to choose whether to turn on the steam generator 100. A thermostat 310 connected in series with the heating element 226 can also be set to prevent the heating element 226 from being overheated and damaged.

[0138] The control circuit also includes an indicator light 304 connected in parallel with the motor 222 .

[0139] By setting the control circuit, the steam generator 100 can be turned on only after the motor 222 starts working, thereby ensuring that the steam generated by the steam generator 100 can be taken away in time by the airflow generated by the fan after entering the cooking pot, ensuring that the steam will not affect the operation of the motor 222.

[0140] It should be clarified that in the claims, specification and drawings of the present invention, the term "multiple" refers to two or more than two. Unless otherwise clearly defined, the orientation or position relationship indicated by the terms "upper" and "lower" is based on the orientation or position relationship shown in the drawings, which is only for the purpose of more conveniently describing the present invention and making the description process easier, rather than indicating or implying that the device or element referred to must have the specific orientation described, be constructed and operated in a specific orientation, so these descriptions cannot be understood as limitations on the present invention; the terms "connect", "install", "fix" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection between multiple objects, or a detachable connection between multiple objects, or an integral connection; it can be a direct connection between multiple objects, or an indirect connection between multiple objects through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood based on the specific circumstances of the above data.

[0141] In the claims, specification and drawings of the present invention, the description of the terms "one embodiment", "some embodiments", "specific embodiments" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In the claims, specification and drawings of the present invention, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0142] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A steam generator, characterized in that: include: Evaporation tube; A heating pipe is arranged side by side with the evaporation pipe; A switch assembly connected to the first port of the evaporation tube; The trigger component, the heating tube is also used to heat the trigger component, the trigger component can perform a trigger action according to its own temperature, and the trigger action is used to trigger the switch component to open the first port.

2. The steam generator according to claim 1, characterized in that: Also includes: A heat conducting member, the evaporating tube and the heating tube are arranged on the heat conducting member, and the trigger component is connected to the heat conducting member.

3. The steam generator according to claim 1, characterized in that: The evaporation tube is a straight tube; The heating tube is parallel to the evaporation tube.

4. The steam generator according to claim 1, characterized in that: The evaporation tube is a U-shaped tube, and the heating tube is in a U-shape corresponding to the evaporation tube.

5. The steam generator according to claim 1, characterized in that: The evaporation tube is an L-shaped tube, and the heating tube is in an L-shape corresponding to the evaporation tube.

6. The steam generator according to claim 4 or 5, characterized in that: The evaporation tube and the heating tube are arranged around the trigger component.

7. The steam generator according to any one of claims 1 to 5, characterized in that: Also includes: The spoiler is arranged in the evaporating tube and is used for spoiling the liquid in the evaporating tube.

8. The steam generator according to any one of claims 1 to 5, characterized in that: Also includes: A water inlet pipe, connecting the evaporation tube and the switch assembly; The cross-sectional area of ​​at least part of the water inlet pipe is greater than or equal to 0.7 mm 2 , and less than or equal to 12.6mm 2 .

9. An air fryer, characterized in that: include: A steam generator as claimed in any one of claims 1 to 8; A liquid storage component, connected to the switch component, comprising a liquid storage chamber; The switch assembly includes an on state and a off state. In the on state, the switch assembly connects the liquid storage chamber and the first port, and in the off state, the switch assembly blocks the liquid storage chamber and the first port. Wherein, the triggering action is used to switch the switch component to the on state.

10. The air fryer according to claim 9, characterized in that: The switch assembly comprises: A body, wherein the body includes a flow channel, and the flow channel is connected to the evaporation tube; A valve core is connected to the body, the valve core includes a first position and a second position, when the valve core is in the first position, the valve core blocks the flow channel, and when the valve core is in the second position, the valve core opens the flow channel; Wherein, the trigger component drives the valve core to move to the first position through the trigger action.

11. The air fryer according to claim 10, characterized in that: The body comprises: Valve seat; An elastic valve body is arranged on the valve seat, and the valve core is arranged on the elastic valve body; A valve cover is connected to the valve seat, the valve cover includes an inlet, the elastic valve body and the valve cover enclose the flow channel, and the valve core blocks or opens the inlet.

12. The air fryer according to claim 11, characterized in that: The switch assembly further comprises: The elastic part is connected to the elastic valve body and the valve core, and is used to drive the valve core to return to the first position.

13. The air fryer according to claim 10, characterized in that: The steam generator further comprises a heat conducting member, and the trigger assembly comprises: A driving member connected to the heat conducting member, wherein the driving member is at least partially formed of a memory metal; A push rod is connected to the driving member, and the deformed driving member pushes the valve core through the push rod.

14. The air fryer according to claim 13, characterized in that: The driving member comprises: An inner ring connected to the heat conducting member; The memory metal ring is sleeved on the circumference of the inner ring and connected to the push rod. The heated memory metal ring bends toward the direction where the valve core is located.

15. The air fryer according to claim 11, characterized in that: The liquid storage component comprises: a water tank, detachably connected to the valve cover, comprising a water outlet; A sealing valve, arranged at the drain port; When the water tank is connected to the valve cover, the sealing valve abuts against the valve cover and the sealing valve opens the drain port. When the sealing valve is separated from the valve cover, the sealing valve closes the drain port.

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