A steaming and baking apparatus

Abstract

The application relates to a steaming and baking equipment, which comprises a cavity assembly, a first exhaust pipeline and an exhaust structure; an exhaust cavity is formed in the exhaust structure; an exhaust port for the exhaust cavity to communicate with the outside is arranged on the exhaust structure; the exhaust structure is provided with a first air vent communicating with the exhaust cavity; the first exhaust pipeline is communicated with the first air vent and the inside of the cavity assembly respectively; a first valve is arranged in the exhaust cavity; the first valve is used for adjusting the flow of steam entering the exhaust cavity through the first air vent according to the internal air pressure of the cavity assembly; and the first valve is in a normally open state. The first valve in the normally open state is matched with the first air vent, the exhaust amount can be adjusted according to the internal air pressure of the cavity assembly, and the problem that the exhaust hole of the steaming and baking equipment in the prior art cannot change the exhaust amount according to the air pressure in the furnace cavity is solved.

Description

Technical Field

[0001] This invention relates to the field of cooking equipment technology, and more specifically to a steaming and baking device. Background Technology

[0002] Existing steam-grilling equipment typically includes a steam generator to produce steam for cooking food. Furthermore, in steaming, grilling, or air-frying cooking modes, the moisture in the food itself is heated and also generates steam. Due to the airtight nature of the oven cavity, steam and small droplets mixed in with the steam can only escape through the exhaust vents on the equipment, which are usually directly connected to the oven cavity.

[0003] However, in cooking, an excessively large vent can cause steam to escape too quickly during the heating process, resulting in slow heating inside the oven. On the other hand, an excessively small vent cannot expel steam quickly when a large amount of steam is generated, leading to excessive pressure inside the oven and the gas bursting open the oven door. The steam oven cannot adjust the exhaust volume according to the gas pressure inside the oven cavity, which needs to be improved. Summary of the Invention

[0004] In view of this, the present invention provides a steam oven that solves the problem that the exhaust vent of the existing steam oven cannot change the exhaust volume according to the gas pressure inside the oven cavity.

[0005] To achieve one or more of the above objectives or other objectives, the present invention provides a steaming and baking device, including a cavity assembly, a first exhaust pipe and an exhaust structure;

[0006] The exhaust structure has an exhaust chamber inside, and the exhaust structure is provided with an exhaust port for the exhaust chamber to communicate with the outside. The exhaust structure is provided with a first vent that communicates with the exhaust chamber, and the two ends of the first exhaust pipe are respectively connected to the first vent and the interior of the cavity assembly.

[0007] The exhaust chamber is provided with a first valve, which is used to adjust the flow rate of steam entering the exhaust chamber through the first vent according to the internal air pressure of the chamber assembly, and the first valve is normally open.

[0008] In an optional embodiment, the first valve has at least two of the following states:

[0009] First state: The first valve cover is placed on the first vent and blocks a part of the first vent area, and the airflow only passes through the part of the first vent that is not blocked by the first valve;

[0010] The second state: The air pressure inside the cavity assembly is sufficient to push the first valve, and the first valve leaves the first vent after being pushed by the air pressure inside the cavity assembly;

[0011] When the first valve is in the second state during the exhaust process, and the air compression inside the cavity assembly is so small that it cannot push the first valve away from the first vent, the first valve resets to the first state.

[0012] In an optional embodiment, one end of the first valve is rotatably connected to one side of the first vent, and the first valve can be flipped to partially block the first vent or move away from the first vent.

[0013] The first valve has multiple first through holes. When the first valve is in the first state, the airflow passes through the first through holes.

[0014] In an optional embodiment, the angle between the first valve and the first vent is less than 90 degrees.

[0015] In an optional embodiment, a hot air hood is provided inside the cavity assembly, which divides the internal space of the cavity assembly into a hot air cavity and a cooking cavity. The hot air hood has ventilation holes, and the hot air cavity and the cooking cavity are connected through the ventilation holes.

[0016] One end of the first exhaust pipe is connected to the cooking cavity;

[0017] The hot air chamber is equipped with a hot air device, which is used to generate hot air.

[0018] The cavity assembly is equipped with a steam device, which is connected to the hot air cavity or the cooking cavity. The steam device is used to generate steam and send it into the cooking cavity.

[0019] In an optional embodiment, the steam oven further includes a second exhaust pipe, the two ends of which are respectively connected to the hot air cavity and the exhaust structure;

[0020] The exhaust structure is provided with a second vent that is connected to the exhaust chamber at one end, and the other end of the second vent is connected to the second exhaust pipe.

[0021] A second valve is movably connected to the second exhaust pipe. The hot air device can change the internal air pressure of the hot air chamber. The second valve is used to adjust the flow rate of steam entering the second vent through the exhaust port according to the change in the internal air pressure of the hot air chamber, and the second valve is normally open.

[0022] In one alternative embodiment, the second valve has at least two of the following states:

[0023] First state: The second valve cover is placed on the second vent and blocks a portion of the second vent area, and the airflow only passes through the part of the second vent that is not blocked by the second valve;

[0024] The second state: The hot air device generates wind pressure so that the internal air pressure of the hot air chamber is sufficient to push the second valve. After being pushed away by the airflow, the second valve leaves the second vent.

[0025] When the second valve is in the second state during the exhaust process, if the air pressure generated by the hot air device is unable to push the second valve away from the second vent, the second valve will reset to the first state.

[0026] In an optional embodiment, the hot air device includes a fan and a heating element, both of which are disposed in the hot air chamber. When the rotational speed of the fan is equal to or exceeds a preset rotational speed, the second valve is in a second state.

[0027] In one alternative embodiment, the fan includes a motor and a fan blade, the fan blade being located inside the hot air cavity, the motor being fixed to the outside of the cavity assembly, and the output shaft of the motor passing through the hot air cavity and connected to the fan blade;

[0028] A second exhaust hole is formed on the cavity wall of the hot air chamber, and the second exhaust pipe is connected to the second exhaust hole, which is located on the outer periphery of the fan blade.

[0029] In an optional embodiment, one end of the second valve is rotatably connected to one side of the second vent, and the second valve can be flipped to partially block the second vent or move away from the second vent;

[0030] The second valve has multiple second through holes. When the second valve is in the first state, the airflow passes through the second through holes.

[0031] In one alternative embodiment, the angle between the second valve and the second vent is less than 90 degrees.

[0032] In one alternative embodiment, the exhaust structure includes a shroud, and the exhaust port is formed on the shroud;

[0033] The cover is provided with a rotating shaft, and the exhaust chamber, the first vent and the second vent are formed in the cover. The first vent and the second vent are respectively located on the radial sides of the rotating shaft, and the exhaust chamber is located at the top of the first vent and the second vent.

[0034] The bottom of the first vent is connected to the first exhaust pipe, and the bottom of the second vent is connected to the second exhaust pipe;

[0035] Both the first valve and the second valve are rotatably connected to the rotating shaft.

[0036] In one alternative embodiment, the cover includes a base and a cover that overlap each other, and the vent is located on the top of the cover;

[0037] The base has two plug-in terminals at its bottom, which are respectively plugged into the first exhaust pipe and the second exhaust pipe;

[0038] The base forms a first vent and a second vent, which are respectively connected to the two plug-in terminals.

[0039] The base has a shaft hole, and the rotating shaft can be detachably inserted into the shaft hole;

[0040] The inner wall of the base is provided with a baffle rib, which is used to abut against the first valve and the second valve to limit their movement.

[0041] In one alternative embodiment, the steam device includes a water tank, a water pump, a water inlet pipe, an evaporator, and an air inlet pipe disposed outside the cavity assembly;

[0042] The water tank, the water pump, the water inlet pipe, the evaporator, and the air inlet pipe are connected in sequence, and the air inlet pipe is connected to the hot air chamber.

[0043] In an optional embodiment, the first valve adopts any of the following schemes:

[0044] The first option is as follows: The first valve is a plate with multiple vertical through holes. The plate covers the first vent. One end of the plate extends downward to form a sliding rod. A connecting part is provided on one side of the first vent. The connecting part has a first movable cavity extending in the vertical direction. The sliding rod is slidably disposed in the first movable cavity and limited within the first movable cavity. The first valve moves vertically according to the internal air pressure of the cavity assembly.

[0045] The second option is as follows: The first valve is a block with multiple vertical through holes. The block covers the first vent. A first guide post extends vertically inside the exhaust structure. A first guide groove is provided on the first valve for the first guide post to pass through. The first valve moves vertically along the first guide groove. A first limiting structure is provided on the first guide post or the first vent. When the first valve moves down to the lowest position, it abuts against the first limiting structure. The bottom surface of the first valve is set as an inclined surface.

[0046] In one alternative embodiment, the second valve adopts any of the following schemes:

[0047] The first option is as follows: The second valve is a plate with multiple vertical through holes. The plate covers the second vent. One end of the plate extends downward to form a sliding rod. A connecting part is provided on one side of the second vent. The connecting part has a second movable cavity extending in the vertical direction. The sliding rod is slidably disposed in the second movable cavity and limited within the second movable cavity. The second valve moves vertically according to the internal air pressure of the hot air cavity.

[0048] The second option is as follows: The second valve is a block with multiple vertical through holes. The block covers the second vent. A second guide post extends vertically inside the exhaust structure. A second guide groove is provided on the second valve for the second guide post to pass through. The second valve moves vertically along the second guide groove. A second limiting structure is provided on the second guide post or the second vent. When the second valve moves down to the lowest position, it abuts against the second limiting structure. The bottom surface of the second valve is set as an inclined surface.

[0049] Implementing the embodiments of the present invention will have the following beneficial effects:

[0050] This invention, by setting a normally open first valve in conjunction with a first vent, allows for adjustment of the exhaust volume based on the internal air pressure of the cavity assembly. Steam within the cavity assembly travels through the first exhaust pipe to the first vent, and after being regulated by the first valve, passes through the exhaust chamber and vent before being discharged to the outside. This invention maintains the internal air pressure of the cavity assembly within a suitable range, thus preventing excessive steam loss during heating due to excessive exhaust volume, which would result in slow food heating, and preventing excessive internal pressure due to insufficient exhaust volume, which could cause the oven door of the steam oven to burst open.

[0051] This solves the problem in existing steam ovens where the exhaust vents cannot adjust the exhaust volume according to the gas pressure inside the oven cavity. Attached Figure Description

[0052] To more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0053] in:

[0054] Figure 1 This is a perspective view of a steam-roasting apparatus according to an optional embodiment of the present invention;

[0055] Figure 2 This is a perspective view of a steam-baking device according to an optional embodiment of the present invention;

[0056] Figure 3 This is a cross-sectional view of a steam-roasting apparatus according to an optional embodiment of the present invention;

[0057] Figure 4 This is another cross-sectional view of a steam-roasting apparatus according to an optional embodiment of the present invention;

[0058] Figure 5 This is an exploded view of an optional embodiment of the steam-roasting apparatus of the present invention;

[0059] Figure 6 This is an exploded view of the exhaust structure in an optional embodiment of the present invention;

[0060] Figure 7 This is a cross-sectional view of the exhaust structure in an optional embodiment of the present invention, showing that both the first valve and the second valve are in the first state.

[0061] Figure 8 This is a cross-sectional view of the exhaust structure in an optional embodiment of the present invention, showing the first valve in the second state and the second valve in the first state;

[0062] Figure 9 This is a cross-sectional view of the exhaust structure in an optional embodiment of the present invention, showing that both the first valve and the second valve are in the second state.

[0063] Figure 10 This is a schematic diagram of the exhaust structure in another optional embodiment of the present invention;

[0064] Figure 11 This is a schematic diagram of the exhaust structure in another optional embodiment of the present invention;

[0065] Figure 12 This is a schematic diagram of the exhaust structure in another optional embodiment of the present invention.

[0066] The reference numerals in the attached drawings are explained as follows: 1-Cavity assembly; 11-Hot air cavity; 111-Second exhaust port; 112-Steam inlet; 12-Cooking cavity; 121-First exhaust port; 13-Hot air hood; 131-Ventilation hole; 2-First exhaust pipe; 3-Second exhaust pipe; 4-Exhaust structure; 41-Hood; 411-Base; 4111-Rib; 4112-Shaft hole; 4113-Plug-in end; 4114-Connecting platform; 4115-Fixing component; 412-Cover; 4121-Exhaust port; 42-First valve; 421-First through hole; 43-Second valve; 431-Second through hole; 44-First through hole 45-Second vent; 46-Rotating shaft; 47-Exhaust chamber; 5-Hot air device; 51-Heating element; 52-Fan; 521-Fan blade; 522-Motor; 6-Steam device; 61-Water tank; 62-Water pump; 63-Water inlet pipe; 64-Evaporator; 65-Air inlet pipe; 01-Connecting part; 011-First movable chamber; 012-Second movable chamber; 021-First guide post; 022-First guide groove; 023-Second guide post; 024-Second guide groove; 025-First limiting structure; 026-Second limiting structure; 031-Third limiting structure; 032-Fourth limiting structure. Detailed Implementation

[0067] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0068] The present invention aims to provide a steam-roasting device that can automatically adjust the exhaust volume according to the gas pressure in the oven cavity.

[0069] Please refer to the following for comprehensive information. Figures 1 to 3 , Figure 6 and Figure 7 An embodiment of the present invention provides a steam oven, including a cavity assembly 1, a first exhaust pipe 2, and an exhaust structure 4. The exhaust structure 4 has an exhaust chamber 47 formed inside, and an exhaust port 4121 for communicating the exhaust chamber 47 with the outside. The exhaust structure 4 also has a first vent 44 communicating with the exhaust chamber 47. The first exhaust pipe 2 is connected at both ends to the first vent 44 and the interior of the cavity assembly 1, respectively. A first valve 42 is provided inside the exhaust chamber 47. The first valve 42 is used to regulate the flow rate of steam entering the exhaust chamber 47 through the first vent 44 according to the internal air pressure of the cavity assembly 1, and the first valve 42 is normally open.

[0070] The first valve 42 is normally open, meaning that steam inside the cavity assembly 1 can always be discharged to the outside through the first vent 44. Specifically, steam inside the cavity assembly 1 reaches the first vent 44 from the first exhaust pipe 2, and after being regulated by the first valve 42, it passes through the exhaust chamber 47 and the exhaust port 4121 in sequence before being discharged to the outside.

[0071] This embodiment can maintain the internal air pressure of the cavity component 1 within a suitable range, thereby avoiding excessive exhaust volume causing the steam inside the cavity component 1 to escape too quickly during the heating process, resulting in slow heating of the food, and avoiding excessive exhaust volume causing the internal pressure of the cavity component 1 to be too high, which could cause the oven door of the steam oven to be forced open.

[0072] In the "steam heating" cooking mode, the steam oven generates hot steam and introduces it into the cavity component 1. The steam heats the food, causing it to gradually heat up. This is the heating phase. During the heating phase, to ensure rapid heating of the food, sufficient steam must be maintained inside the cavity component 1. Since the internal pressure of the cavity component 1 is relatively low during this phase, the exhaust volume can be automatically reduced based on the pressure. When the food temperature is high, the evaporation of moisture from the food increases the steam volume, leading to an increase in the internal pressure of the cavity component 1. Alternatively, if the steam oven itself generates a large amount of steam quickly, causing excessive pressure inside the cavity component 1, the steam inside the cavity component 1 needs to be released quickly. Therefore, the exhaust volume can be automatically increased based on the pressure.

[0073] Optional, please refer to Figures 7 to 12 The first valve 42 has at least two of the following states:

[0074] First state: The first valve 42 is placed on the first vent 44 and blocks a part of the first vent 44, and the airflow only passes through the part of the first vent 44 that is not blocked by the first valve 42;

[0075] The second state: The air pressure inside the cavity assembly 1 is sufficient to push the first valve 42. After being pushed by the air pressure inside the cavity assembly 1, the first valve 42 leaves the first vent 44.

[0076] When the first valve 42 is in the second state during the exhaust process, and the air compression inside the cavity assembly 1 is so small that it cannot push the first valve 42 away from the first vent 44, the first valve 42 is reset to the first state.

[0077] In this embodiment, when the internal air pressure of the cavity assembly 1 is low, the first valve 42 is in the first state, covering the first vent 44 and partially blocking it. The steam flow passes sequentially through the first exhaust pipe 2, the first vent 44, and the exhaust port 4121 to be discharged to the outside. Because part of the airflow is blocked by the first valve 42, the cross-sectional area through which the airflow passes is reduced, the flow rate is decreased, ensuring that the steam heat during the heating stage of cooking is sufficient to heat the food, slowing down steam loss, avoiding slow heating of the food due to steam loss, and avoiding waste of steam heat.

[0078] When the internal air pressure of cavity assembly 1 is high, the airflow passes through the first exhaust pipe 2 and pushes open the first valve 42, causing the first valve 42 to enter the second state. The first valve 42 leaves the first vent 44, thereby expanding the cross-sectional area through which the airflow passes and increasing the flow rate. This can quickly discharge excess steam from cavity assembly 1, reduce the internal pressure of cavity assembly 1, and achieve rapid depressurization. This keeps the internal air pressure of cavity assembly 1 within a suitable cooking pressure range, effectively preventing the gas from forcing open the oven door of the steam oven and improving safety.

[0079] When the steam is discharged into the cavity assembly 1 and the air pressure reaches a suitable range, the thrust of the airflow on the first valve 42 weakens to the point that it can no longer open the first valve 42, and the first valve 42 automatically resets from the second state to the first state. The first valve 42 can be reset from the second state to the first state by its own weight, or by elastic elements such as torsion springs, springs, or tension springs.

[0080] This invention has a simple structure, low cost, and can automatically adjust the exhaust volume according to the air pressure, making it highly feasible.

[0081] In this embodiment, the structure of the first valve 42 needs to be able to block a portion of the area of ​​the first vent 44. For example, as Figure 12 As shown, the first valve 42 is a solid plate that can partially block the first vent 44. Alternatively, the first valve 42 can be a porous plate, such as... Figure 6 Or it can be a porous block, such as Figure 11 And so on. The following examples illustrate the structure of the first valve 42.

[0082] As a first example of the structure of the first valve 42, such as Figures 6 to 9 As shown, one end of the first valve 42 is rotatably connected to one side of the first vent 44. The first valve 42 can be flipped to partially block or move away from the first vent 44. The first valve 42 has multiple first through holes 421. When the first valve 42 is in the first state, such as... Figure 7As shown, airflow passes through the first through-hole 421. When the internal air pressure of the cavity assembly 1 is too high, the airflow pushes the first valve 42 to rotate upward after passing through the first exhaust pipe 2, and the first valve 42 enters the second state, as shown. Figure 8 As shown, the first valve 42 moves away from the first vent 44, partially or completely removing the obstruction of the first vent 44, increasing the flow rate of steam through the first vent 44, allowing the steam to be discharged quickly and achieving rapid depressurization. When the internal pressure of the cavity assembly 1 decreases to a suitable range, the first valve 42 flips downward under its own gravity or the action of the elastic element, and is placed back on the first vent 44.

[0083] The internal air pressure of the cavity assembly 1 can be adjusted by changing the weight of the first valve 42 itself. This can change the threshold of the state of the first valve 42 and control the internal air pressure of the cavity assembly 1 to reach the required cooking pressure. When the internal air pressure of the cavity assembly 1 exceeds or reaches the threshold, the first valve 42 is in the second state. When the threshold is not reached, the first valve 42 is in the first state.

[0084] As a second example of the structure of the first valve 42, such as Figure 12 As shown, the first valve 42 is a solid plate that can block half of the first vent 44. When the first valve 42 is in the first state, the airflow passes through the other half of the first vent 44. When the internal air pressure of the cavity assembly 1 is too high, the airflow pushes the first valve 42 to rotate and flip upward after passing through the first exhaust pipe 2. The first valve 42 enters the second state, increasing the flow rate of steam through the first vent 44.

[0085] In the first and second examples of the structure of the first valve 42, the angle between the first valve 42 and the first vent 44 is less than 90 degrees to prevent the first valve 42 from failing to return to its first state after rotating more than 90 degrees. In practice, the weight of the first valve 42 can be adjusted so that the air pressure inside the cavity assembly 1 of the steam oven during normal operation cannot push the first valve 42 to rotate more than or equal to 90 degrees; alternatively, a limiting structure can be set to limit the rotation angle of the first valve 42. For example, as... Figure 12 As shown, in the second example, the exhaust structure 4 is provided with a horizontally extending third limiting structure 031 and a vertically extending fourth limiting structure 032. When the first valve 42 rotates to the lowest point, it abuts against the third limiting structure 031, and when it rotates to the highest point, it abuts against the fourth limiting structure 032. This limiting structure is also applicable to the first example of the structure of the first valve 42, which will not be described in detail here.

[0086] As a third example of the structure of the first valve 42, such as Figure 10As shown, the first valve 42 is a plate with multiple vertical through holes. The plate covers the first vent 44. One end of the plate extends downward to form a sliding rod. A connecting part 01 is provided on one side of the first vent 44. The connecting part 01 has a first movable cavity 011 extending vertically. The sliding rod is slidably disposed in and limited within the first movable cavity 011. The first valve 42 moves vertically according to the internal air pressure of the cavity assembly 1. When the sliding rod is at its lowest point, the first valve 42 is in the first state, and the first valve 42 covers the first vent 44. When the first valve 42 is pushed by air pressure, causing the sliding rod to move upward, the first valve 42 is in the second state, and the exhaust volume increases.

[0087] As a fourth example of the structure of the first valve 42, such as Figure 11 As shown, the first valve 42 is a block with multiple vertical through holes. The block covers the first vent 44. A first guide post 021 extends vertically inside the exhaust structure 4. A first guide groove 022 is provided on the first valve 42 for the first guide post 021 to pass through. The first valve 42 moves vertically along the first guide groove 022. The first guide post 021 or the first vent 44 is provided with a first limiting structure 025. When the first valve 42 moves down to its lowest position, it abuts against the first limiting structure 025. In this example, the first limiting structure 025 is formed by a radial protrusion at the edge of the first vent 44. Preferably, the bottom surface of the first valve 42 is set as an inclined surface. The inclined surface is used to guide the rising steam, so that the first valve 42 gradually moves upward, gradually increasing the steam flow rate. This can prevent the first valve 42 from leaving the first vent 44 too quickly and avoid steam bursting.

[0088] like Figure 4 and Figure 5 As shown, a hot air hood 13 is provided inside the cavity assembly 1, dividing the internal space of the cavity assembly 1 into a hot air cavity 11 and a cooking cavity 12. A ventilation hole 131 is provided on the hot air hood 13, and the hot air cavity 11 and the cooking cavity 12 are connected through the ventilation hole 131. One end of the first exhaust pipe 2 is connected to the cooking cavity 12. A hot air device 5 is provided in the hot air cavity 11 to generate hot air. A steam device 6 is provided on the cavity assembly 1, connected to either the hot air cavity 11 or the cooking cavity 12, and used to generate steam and send it into the cooking cavity 12. In this embodiment, the steam device 6 is connected to the hot air cavity 11, and a steam inlet 112 is formed on the hot air cavity 11, with the steam device 6 connected to the steam inlet 112. A first exhaust hole 121 may be formed inside the cooking cavity 12, and one end of the first exhaust pipe 2 is connected to the first exhaust hole 121.

[0089] The hot air device 5 generates hot air, which passes sequentially through the hot air chamber 11, the ventilation hole 131, and the cooking chamber 12 to heat the food. After heating, the hot air then passes sequentially through the ventilation hole 131 and the hot air chamber 11 before returning to the hot air device 5, forming a hot air circulation. The hot air circulation can be used in "air frying" or "grilling" cooking modes, as well as in "steam heating" cooking modes.

[0090] Because the ingredients themselves contain moisture, the evaporation of this moisture when heated results in a high level of humidity inside the cooking cavity 12. In "air fry" or "bake" cooking modes, the ingredients do not require excessive moisture. Excessive humidity during cooking leads to poor dehydration of the food, resulting in a poor texture, loss of crispness, or a weaker Maillard reaction. However, in "air fry" or "bake" cooking modes, because the steam oven (specifically, the steam device 6) does not generate steam, the pressure inside the cavity assembly 1 is insufficient to open the first valve 42, and the steam oven cannot actively change the state of the first valve 42 according to the cooking mode.

[0091] To address the problem described in the previous paragraph, in an optional embodiment, the steam oven further includes a second exhaust pipe 3, the two ends of which are connected to the hot air chamber 11 and the exhaust structure 4, respectively.

[0092] The exhaust structure 4 is provided with a second vent 45, one end of which is connected to the exhaust chamber 47, and the other end of the second vent 45 is connected to the second exhaust pipe 3.

[0093] A second valve 43 is movably connected at the second exhaust pipe 3. The hot air device 5 can change the internal air pressure of the hot air chamber 11. The second valve 43 is used to adjust the flow rate of steam entering the second vent 45 through the exhaust port 4121 according to the change in the internal air pressure of the hot air chamber 11. The second valve 43 is normally open.

[0094] Since the hot air hood 13 has a certain obstruction effect on the airflow, when the hot air device 5 rotates to generate hot air, the air pressure inside the hot air cavity 11 changes due to different wind pressure intensities. In this way, the steam oven can increase or decrease the pressure of the hot air cavity 11 by controlling the air output intensity of the hot air device 5, and then control the second valve 43 to adjust the flow rate of steam entering the second vent 45 through the exhaust port 4121, thereby realizing the active control function of the steam oven for changing the exhaust volume.

[0095] The second valve 43 is normally open, meaning that the airflow inside the hot air chamber 11 can always be discharged to the outside through the second valve 43. Specifically, the airflow blown into the hot air chamber 11 by the hot air device 5 reaches the second vent 45 from the first exhaust pipe 2, and after being regulated by the second valve 43, it passes through the exhaust chamber 47 and the exhaust port 4121 in sequence before being discharged to the outside.

[0096] The first vent 44 and the second vent 45 are both connected to the exhaust chamber 47. The exhaust chamber 47 is used to guide the gas discharged from the first vent 44 and the second vent 45. The first vent 44 and the second vent 45 share one exhaust chamber 47, which saves space and minimizes the volume of the exhaust structure 4.

[0097] Optional, please refer to the following: Figures 7 to 12 The second valve 43 has at least two of the following states:

[0098] In the first state: the second valve 43 is placed on the second vent 45, blocking a portion of the second vent 45, and the airflow only passes through the part of the second vent 45 that is not blocked by the second valve 43.

[0099] The second state: The hot air device 5 generates wind pressure so that the internal air pressure of the hot air chamber 11 is sufficient to push the second valve 43. After being pushed by the airflow, the second valve 43 leaves the second vent 45.

[0100] When the second valve 43 is in the second state during the exhaust process, if the air pressure generated by the hot air device 5 is unable to push the second valve 43 away from the second vent 45, the second valve 43 will reset to the first state.

[0101] The second valve 43 can be reset from the second state to the first state by its own weight, or by elastic elements such as torsion springs, springs, or tension springs.

[0102] Because the hot air hood 13 obstructs airflow, when the hot air device 5 rotates to generate hot air, the air pressure increases the internal air pressure of the hot air chamber 11, which in turn pushes the second valve 43 away from the second vent 45. In this way, the steam oven can control the state of the second valve 43 by controlling the air output of the hot air device 5, thereby realizing the active control function of the steam oven for changing the exhaust volume.

[0103] When the steam oven is in "air fry" or "bake" cooking mode, and it is necessary to quickly remove moisture from the cooking cavity 12, the hot air device 5 is controlled to provide sufficient airflow to push the second valve 43, increasing the exhaust volume. During hot air circulation, moisture in the cooking cavity 12 is carried by the airflow into the ventilation hole 131, enters the hot air cavity 11, and flows back to the hot air device 5. The moisture is then blown by the hot air device 5 into the second exhaust pipe 3 and quickly discharged to the outside through the second vent 45 and exhaust port 4121, achieving the function of quickly removing moisture from the cooking cavity 12. When it is not necessary to remove moisture, the steam oven controls and reduces the airflow of the hot air device 5. The airflow is insufficient to push open the second valve 43, and the second valve 43 partially obstructs the steam flow, reducing the steam exhaust speed.

[0104] Furthermore, such as Figure 4 and Figure 5 As shown, the hot air device 5 includes a fan 52 and a heating element 51, both of which are located in the hot air chamber 11. When the speed of the fan 52 is equal to or exceeds a preset speed, the second valve 43 is in a second state. For example, the fan 52 has three speeds: high speed, medium speed, and low speed. The high speed is set as the preset speed. When the fan 52 is at a high speed, the generated airflow is sufficient to open the second valve 43, putting it in the second state and allowing steam to be discharged quickly. When the fan is at a medium or low speed, the airflow of the fan 52 is insufficient to open the second valve 43, slowing down the discharge of steam.

[0105] The heating element 51 can be coiled around the outer periphery of the fan 52. The heating element 51 can be replaced with a heating rod or the like, as long as it has a heating function.

[0106] Specifically, the fan 52 includes a motor 522 and a fan blade 521. The fan blade 521 is located inside the hot air chamber 11, and the motor 522 is fixed to the outside of the chamber assembly 1. The output shaft of the motor 522 passes through the hot air chamber 11 and connects to the fan blade 521. A second exhaust hole 111 is formed on the wall of the hot air chamber 11, and the second exhaust pipe 3 is connected to the second exhaust hole 111. The second exhaust hole 111 is located on the outer periphery of the fan blade 521. The state of the second valve 43 can be changed by controlling the rotational speed of the motor 522, i.e., controlling the rotational speed of the fan 52.

[0107] Since the fan 52 blows air out radially outward, the second discharge hole 111 is located on the outer periphery of the fan blade 521, which facilitates the fan 52 to blow air smoothly into the second discharge hole 111, enter the second exhaust pipe 3, push open the second valve 43, and improve the sensitivity of the second valve 43.

[0108] The structure of the second valve 43 can be similar to that of the first valve 42.

[0109] In this embodiment, the structure of the second valve 43 needs to be able to block a partial area of ​​the second vent 45. For example, as Figure 12 As shown, the second valve 43 is a solid plate that can partially block the second vent 45. Alternatively, the second valve 43 can be a porous plate, such as... Figure 6 Or it can be a porous block, such as Figure 11 And so on. The following examples illustrate the structure of the second valve 43.

[0110] As a first example of the structure of the second valve 43, such as Figures 6 to 9As shown, one end of the second valve 43 is rotatably connected to one side of the second vent 45. The second valve 43 can be flipped to partially block or move away from the second vent 45. The second valve 43 has multiple second through holes 431. When the second valve 43 is in the first state, such as... Figure 7 As shown, airflow passes through the second through-hole 431. When the air pressure inside the hot air chamber 11 is too high, the airflow pushes the second valve 43 to rotate upward after passing through the second exhaust pipe 3, and the second valve 43 enters the second state, as shown. Figure 8 As shown, the second valve 43 moves away from the second vent 45, partially or completely removing the obstruction of the second vent 45, increasing the flow rate of steam through the second vent 45, allowing the steam to be discharged quickly and achieving rapid depressurization. When the hot air device 5 controls the internal air pressure of the hot air chamber 11 to decrease, the second valve 43 flips downward under its own gravity or the action of the elastic element, and is placed back on the second vent 45.

[0111] The threshold value of the second valve 43's state can be changed by adjusting the internal air pressure of the hot air chamber 11, thereby actively controlling the amount of steam discharged from the hot air chamber 11 and the cooking chamber 12 and reducing the moisture in the cooking chamber 12. When the internal air pressure of the hot air chamber 11 exceeds or reaches the threshold value, the second valve 43 is in the second state; when it does not reach the threshold value, the second valve 43 is in the first state.

[0112] As a second example of the structure of the second valve 43, such as Figure 12 As shown, the second valve 43 is a solid plate that can block half of the second vent 45. When the second valve 43 is in the first state, the airflow passes through the other half of the second vent 45. When the air pressure inside the hot air chamber 11 is too high, the airflow pushes the second valve 43 to rotate and flip upward after passing through the first exhaust pipe 2. The second valve 43 enters the second state, increasing the flow rate of steam through the second vent 45.

[0113] In the first and second examples of the structure of the second valve 43, the angle between the second valve 43 and the second vent 45 is less than 90 degrees, preventing the second valve 43 from failing to return to its first state after rotating more than 90 degrees. In practice, the weight of the second valve 43 can be adjusted so that the air pressure inside the hot air chamber 11 during normal operation of the steam oven cannot push the second valve 43 to rotate more than or equal to 90 degrees; alternatively, a limiting structure can be set to limit the rotation angle of the second valve 43. For example, as... Figure 12As shown, in the second example, the exhaust structure 4 is provided with a horizontally extending third limiting structure 031 and a vertically extending fourth limiting structure 032. When the second valve 43 rotates to the lowest point, it abuts against the third limiting structure 031, and when it rotates to the highest point, it abuts against the fourth limiting structure 032. This limiting structure is also applicable to the first example of the second valve 43 structure, which will not be described in detail here.

[0114] As a third example of the structure of the second valve 43, such as Figure 10 As shown, the second valve 43 is a plate with multiple vertical through holes. The plate covers the second vent 45. One end of the plate extends downward to form a sliding rod. A connecting part 01 is provided on one side of the second vent 45. The connecting part 01 has a second movable cavity 012 extending vertically. The sliding rod is slidably disposed in the second movable cavity 012 and limited within the second movable cavity 012. The second valve 43 moves vertically according to the internal air pressure of the hot air chamber 11. When the sliding rod is at its lowest point, the second valve 43 is in the first state, and the second valve 43 covers the second vent 45. When the second valve 43 is pushed by the wind pressure, causing the sliding rod to move upward, the second valve 43 is in the second state, and the exhaust volume increases.

[0115] As a fourth example of the structure of the second valve 43, such as Figure 11 As shown, the second valve 43 is a block with multiple vertical through holes. The block covers the second vent 45. A second guide post 023 extends vertically inside the exhaust structure 4. A second guide groove 024 is provided on the second valve 43 for the second guide post 023 to pass through. The second valve 43 moves vertically along the second guide groove 024. The second guide post 023 or the second vent 45 is provided with a second limiting structure 026. When the second valve 43 moves down to its lowest position, it abuts against the second limiting structure 026. In this example, the second limiting structure 026 is formed by a radial protrusion at the edge of the second vent 45. Preferably, the bottom surface of the second valve 43 is set as an inclined surface. The inclined surface is used to guide the rising steam, so that the second valve 43 gradually moves upward, gradually increasing the steam flow rate. This can prevent the second valve 43 from leaving the second vent 45 too quickly and avoid steam bursting.

[0116] When the structures of the first valve 42 and the second valve 43 both adopt the first example, such as Figure 6 As shown, in order to minimize the volume of the exhaust structure 4, improve space utilization and reduce the number of parts, the first valve 42 and the second valve 43 can be rotatably connected on the same shaft.

[0117] For example, the exhaust structure 4 includes a cover 41, with an exhaust port 4121 formed on the cover 41. A rotating shaft 46 is disposed inside the cover 41, forming a first vent 44 and a second vent 45, which are located on opposite radial sides of the rotating shaft 46. The bottom of the first vent 44 communicates with the first exhaust pipe 2, and the bottom of the second vent 45 communicates with the second exhaust pipe 3. A first valve 42 and a second valve 43 are both rotatably connected to the rotating shaft 46.

[0118] The exhaust port 4121 can be configured as a grid.

[0119] Specifically, to facilitate the disassembly and installation of the exhaust structure 4, the cover 41 includes a base 411 and a cover 412 that overlap each other, with an exhaust port 4121 located on the top of the cover 412. The bottom of the base 411 has two insertion ends 4113, which are respectively inserted into the first exhaust pipe 2 and the second exhaust pipe 3. A first vent 44 and a second vent 45 are formed inside the base 411, communicating with the two insertion ends 4113 respectively. A shaft hole 4112 is provided on the base 411, into which a rotating shaft 46 is detachably inserted. A retaining rib 4111 protrudes from the inner wall of the base 411, which is used to abut against the first valve 42 and the second valve 43 for limiting their movement.

[0120] The baffle 4111 can be used to limit the rotation of the first valve 42 and the second valve 43 to the lowest point, so that the first valve 42 and the second valve 43 are at a suitable angle in the first state, increasing the force-bearing area and making it easier to be pushed by the airflow.

[0121] The base 411 may be provided with connecting platforms 4114 at both ends. The connecting platforms 4114 may be detachably provided with fastening components 4115, including but not limited to screws. The connecting platforms 4114 and the cover 412 are locked together by the fastening components 4115.

[0122] The steam device 6 includes a water tank 61, a water pump 62, a water inlet pipe 63, an evaporator 64, and an air inlet pipe 65, all located outside the cavity assembly 1. The water tank 61, water pump 62, water inlet pipe 63, evaporator 64, and air inlet pipe 65 are connected in sequence, and the air inlet pipe 65 is connected to the hot air cavity 11.

[0123] The water pump 62 pumps the liquid water in the water tank 61 into the evaporator 64. The evaporator 64 evaporates the liquid water to form steam. The steam is sent into the hot air chamber 11 through the air inlet pipe 65, and then enters the cooking chamber 12 through the ventilation hole 131 to heat the food.

[0124] In summary, the present invention can achieve the function of automatically changing the pressure discharge speed through the first valve 42 to control the pressure inside the cavity assembly 1. On the other hand, it can achieve the function of actively changing the steam discharge speed of the steam oven through the second valve 43 to control the moisture inside the cavity assembly 1.

[0125] The above description is merely a preferred embodiment of this application and is not intended to limit this application in any way. Although this application has disclosed the preferred embodiment as above, it is not intended to limit this application. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the technical solution of this application. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the content of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A steam-roasting device, characterized in that: It includes a cavity assembly (1), a first exhaust pipe (2), and an exhaust structure (4); The exhaust structure (4) has an exhaust chamber (47) inside. The exhaust structure (4) is provided with an exhaust port (4121) for the exhaust chamber (47) to communicate with the outside. The exhaust structure (4) is provided with a first vent (44) that communicates with the exhaust chamber (47). The two ends of the first exhaust pipe (2) are respectively connected to the first vent (44) and the interior of the cavity assembly (1). The exhaust chamber (47) is provided with a first valve (42), which is used to adjust the flow rate of steam entering the exhaust chamber (47) through the first vent (44) according to the internal air pressure of the chamber assembly (1), and the first valve (42) is normally open.

2. The steam-roasting equipment as described in claim 1, characterized in that: The first valve (42) has at least two of the following states: First state: The first valve (42) is placed on the first vent (44) and blocks a part of the first vent (44), and the airflow only passes through the part of the first vent (44) that is not blocked by the first valve (42); The second state: the air pressure inside the cavity assembly (1) is sufficient to push the first valve (42), and the first valve (42) leaves the first vent (44) after being pushed by the air pressure inside the cavity assembly (1). When the first valve (42) is in the second state of exhaust process, and the air inside the cavity assembly (1) is compressed to the point that it cannot push the first valve (42) away from the first vent (44), the first valve (42) is reset to the first state.

3. The steam-roasting equipment as described in claim 2, characterized in that: One end of the first valve (42) is rotatably connected to one side of the first vent (44). The first valve (42) can be flipped to partially block the first vent (44) or leave the first vent (44). The first valve (42) has multiple first through holes (421). When the first valve (42) is in the first state, the airflow passes through the first through holes (421).

4. The steam-roasting equipment as described in claim 3, characterized in that: The angle between the first valve (42) and the first vent (44) is less than 90 degrees.

5. The steam-roasting equipment as described in claim 3, characterized in that: The cavity assembly (1) is provided with a hot air hood (13), which divides the internal space of the cavity assembly (1) into a hot air cavity (11) and a cooking cavity (12). The hot air hood (13) is provided with a ventilation hole (131), and the hot air cavity (11) and the cooking cavity (12) are connected through the ventilation hole (131). One end of the first exhaust pipe (2) is connected to the cooking cavity (12); The hot air chamber (11) is provided with a hot air device (5), which is used to generate hot air; The cavity assembly (1) is provided with a steam device (6), which is connected to the hot air cavity (11) or the cooking cavity (12). The steam device (6) is used to generate steam and send it into the cooking cavity (12).

6. The steam-roasting equipment as described in claim 5, characterized in that: The steaming and baking equipment also includes a second exhaust pipe (3), the two ends of which are connected to the hot air cavity (11) and the exhaust structure (4), respectively; The exhaust structure (4) is provided with a second vent (45) at one end connected to the exhaust chamber (47), and the other end of the second vent (45) is connected to the second exhaust pipe (3). A second valve (43) is movably connected to the second exhaust pipe (3). The hot air device (5) can change the internal air pressure of the hot air chamber (11). The second valve (43) is used to adjust the flow rate of steam entering the second vent (45) through the second exhaust pipe (3) according to the change of the internal air pressure of the hot air chamber (11). The second valve (43) is normally open.

7. The steam-roasting equipment as described in claim 6, characterized in that: The second valve (43) has at least two of the following states: First state: The second valve (43) covers the second vent (45) and blocks a portion of the second vent (45), and the airflow only passes through the part of the second vent (45) that is not blocked by the second valve (43); The second state: the hot air device (5) generates wind pressure so that the internal air pressure of the hot air chamber (11) is sufficient to push the second valve (43), and the second valve (43) leaves the second vent (45) after being pushed by the airflow. When the second valve (43) is in the second state of exhaust process, if the air pressure generated by the hot air device (5) is unable to push the second valve (43) away from the second vent (45), the second valve (43) is reset to the first state.

8. The steam-roasting equipment as described in claim 7, characterized in that: The hot air device (5) includes a fan (52) and a heating element (51). Both the fan (52) and the heating element (51) are located in the hot air chamber (11). When the rotation speed of the fan (52) is equal to or exceeds the preset rotation speed, the second valve (43) is in the second state.

9. The steam-roasting equipment as described in claim 8, characterized in that: The fan (52) includes a motor (522) and a fan blade (521). The fan blade (521) is located inside the hot air cavity (11). The motor (522) is fixed outside the cavity assembly (1). The output shaft of the motor (522) passes through the hot air cavity (11) and is connected to the fan blade (521). A second discharge hole (111) is formed on the cavity wall of the hot air cavity (11), and the second exhaust pipe (3) is connected to the second discharge hole (111). The second discharge hole (111) is located on the outer periphery of the fan blade (521).

10. The steam-roasting equipment as described in claim 7, characterized in that: One end of the second valve (43) is rotatably connected to one side of the second vent (45). The second valve (43) can be flipped to partially block the second vent (45) or leave the second vent (45). The second valve (43) has multiple second through holes (431). When the second valve (43) is in the first state, the airflow passes through the second through holes (431).

11. The steam-roasting equipment as described in claim 10, characterized in that: The angle between the second valve (43) and the second vent (45) is less than 90 degrees.

12. The steam-roasting equipment as described in claim 10, characterized in that: The exhaust structure (4) includes a cover (41), and the exhaust port (4121) is opened on the cover (41); The cover (41) is provided with a rotating shaft (46), and the cover (41) forms the exhaust chamber (47), the first vent (44) and the second vent (45). The first vent (44) and the second vent (45) are respectively located on the radial sides of the rotating shaft (46), and the exhaust chamber (47) is located at the top of the first vent (44) and the second vent (45). The bottom of the first vent (44) is connected to the first exhaust pipe (2), and the bottom of the second vent (45) is connected to the second exhaust pipe (3); Both the first valve (42) and the second valve (43) are rotatably connected to the rotating shaft (46).

13. The steam-roasting equipment as described in claim 12, characterized in that: The cover (41) includes a base (411) and a cover (412) that overlap each other, and the exhaust port (4121) is opened on the top of the cover (412); The base (411) has two plug-in terminals (4113) at its bottom, which are respectively plugged into the first exhaust pipe (2) and the second exhaust pipe (3); The base (411) forms a first vent (44) and a second vent (45), which are respectively connected to the two plug-in terminals (4113); The base (411) has a shaft hole (4112) and the rotating shaft (46) can be detachably inserted into the shaft hole (4112); The inner wall of the base (411) is provided with a baffle (4111), which is used to abut against the first valve (42) and the second valve (43) for limiting their movement.

14. The steam-roasting equipment as described in claim 5, characterized in that: The steam device (6) includes a water tank (61), a water pump (62), a water inlet pipe (63), an evaporator (64), and an air inlet pipe (65) disposed outside the cavity assembly (1). The water tank (61), the water pump (62), the water inlet pipe (63), the evaporator (64) and the air inlet pipe (65) are connected in sequence, and the air inlet pipe (65) is connected to the hot air chamber (11).

15. The steam-roasting equipment as described in claim 1 or 2, characterized in that: The first valve (42) can be any of the following schemes: The first option is as follows: the first valve (42) is a plate with multiple vertical through holes. The plate covers the first vent (44). One end of the plate extends downward to form a sliding rod. A connecting part (01) is provided on one side of the first vent (44). The connecting part (01) has a first movable cavity (011) extending in the vertical direction. The sliding rod is slidably disposed in the first movable cavity (011) and limited in the first movable cavity (011). The first valve (42) moves vertically according to the internal air pressure of the cavity assembly (1). The second option is as follows: the first valve (42) is a block with multiple vertical through holes. The block is placed on the first vent (44). The exhaust structure (4) is vertically extended with a first guide post (021). The first valve (42) is provided with a first guide groove (022) for the first guide post (021) to pass through. The first valve (42) moves vertically along the first guide groove (022). The first guide post (021) or the first vent (44) is provided with a first limiting structure (025). When the first valve (42) moves down to the lowest position, it abuts against the first limiting structure (025). The bottom surface of the first valve (42) is set as an inclined surface.

16. The steam-roasting equipment as described in claim 6, characterized in that: The second valve (43) adopts any of the following schemes: The first option is as follows: the second valve (43) is a plate with multiple vertical through holes. The plate covers the second vent (45). One end of the plate extends downward to form a sliding rod. A connecting part (01) is provided on one side of the second vent (45). The connecting part (01) has a second movable cavity (012) extending in the vertical direction. The sliding rod is slidably disposed in the second movable cavity (012) and limited in the second movable cavity (012). The second valve (43) moves vertically according to the internal air pressure of the hot air cavity (11). The second option is as follows: the second valve (43) is a block with multiple vertical through holes. The block is placed on the second vent (45). The exhaust structure (4) is vertically extended with a second guide post (023). The second valve (43) is provided with a second guide groove (024) for the second guide post (023) to pass through. The second valve (43) moves vertically along the second guide groove (024). The second guide post (023) or the second vent (45) is provided with a second limiting structure (026). When the second valve (43) moves down to the lowest position, it abuts against the second limiting structure (026). The bottom surface of the second valve (43) is set as an inclined surface.

Images