Steam jet and cooking equipment

Abstract

The utility model belongs to the technical field of kitchen electric appliances, and discloses a steam jet and cooking equipment. The steam spray head comprises a spray head body and a cover assembly, a cavity is formed in the spray head body, and spray holes communicating with the cavity are formed in the spray head body; the cover assembly is connected with the spray head body and comprises an elastic piece and a movable cover, the elastic piece is connected with the movable cover, and the movable cover is configured to be capable of blocking the spray hole under pushing of the elastic piece or opening the spray hole under pushing of steam in the cavity. According to the steam jet, the jet hole can be opened after the steam pressure in the cavity reaches a certain value, so that the steam flowing into the cooking cavity is ensured to be good in flowability, the steam can be fully diffused and uniformly heated in the cooking cavity, and the cooking effect of food materials is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of kitchen appliances, in particular to a steam nozzle and cooking equipment. Background Art

[0002] The steamer mainly uses a steam generator to heat water and then generate steam. The steamer is directly connected to the steam generator outlet through a pipe. The steam directly enters the steamer cavity through the outlet of the pipe to cook the food.

[0003] In existing steamers, steam directly enters the cavity through the outlet of the pipe. The steam has poor fluidity, resulting in large temperature differences in the local space of the cavity in a short period of time. It takes a long time for the steam to fill the entire cavity, which can easily cause uneven heating of the food. Utility Model Content

[0004] The utility model aims to provide a steam nozzle and cooking equipment, which can solve the problem that the fluidity of steam entering the cavity is poor, resulting in large temperature differences inside the cavity and uneven heating of food.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] A steam spray head, comprising:

[0007] A nozzle body, wherein a cavity is disposed in the nozzle body, and a nozzle hole connected to the cavity is disposed on the nozzle body;

[0008] A cover assembly is connected to the nozzle body, the cover assembly includes an elastic member and a movable cover, the elastic member is connected to the movable cover, and the movable cover is configured to cover the spray hole when pushed by the elastic member, or to open the spray hole when pushed by steam in the cavity.

[0009] As an optional solution of the above-mentioned steam nozzle, the elastic member includes at least two elastic bodies connected in sequence, and along the arrangement direction of the nozzle body and the movable cover, the elastic coefficients of the at least two elastic bodies increase or decrease in sequence.

[0010] As an optional solution of the above steam nozzle, the elastic body is a spring, and at least one of the wire diameter, diameter and effective number of turns of two adjacent elastic bodies is different;

[0011] And / or, a connecting piece is provided between two adjacent elastic bodies, and the connecting piece connects the elastic bodies at both sides respectively.

[0012] As an optional solution for the above-mentioned steam nozzle, the cover assembly also includes a filter cover, which is arranged outside the nozzle body and connected to the nozzle body, a filter cavity is formed between the filter cover and the nozzle body, the movable cover is arranged in the filter cavity, and a plurality of second filter holes are arranged on the filter cover.

[0013] As an optional solution of the above steam spray head, the elastic member elastically connects the spray head body and the movable cover;

[0014] Alternatively, the elastic member elastically connects the movable cover and the filter cover.

[0015] As an optional solution of the above steam spray head, the movable cover includes a first plane, the outer wall of the spray head body or the inner wall of the filter cover includes a second plane parallel to the first plane, and the elastic member connects the first plane and the second plane;

[0016] And / or, a first positioning sleeve is provided on the movable cover, a second positioning sleeve is provided on the outer wall of the nozzle body or the inner wall of the filter cover, one end of the elastic member extends into the first positioning sleeve, and the other end of the elastic member extends into the second positioning sleeve.

[0017] As an optional solution of the above-mentioned steam nozzle, one of the filter cover and the movable cover is provided with a guide column, and the other is provided with a guide hole, and the guide column is slidably penetrated through the guide hole.

[0018] As an optional solution of the above steam nozzle, the elastic member is sleeved outside the guide column;

[0019] And / or, a plurality of guide posts are provided, and the plurality of guide posts are evenly spaced along the circumference of the filter cover.

[0020] As an optional solution of the above steam nozzle, the movable cover is provided with a plurality of first filter holes;

[0021] And / or, a plurality of the spray holes are arranged on the nozzle body, and spray directions of at least two of the spray holes are different.

[0022] As an optional solution of the above-mentioned steam spray head, a drainage outlet communicating with the cavity is provided at the bottom of the spray head body.

[0023] As an optional solution for the above-mentioned steam nozzle, a flow channel portion is provided on the outer wall of the nozzle body, a drainage channel is provided inside the flow channel portion, the drainage channel is connected to the drain port, and a drainage inlet is provided at one end of the flow channel portion extending toward the nozzle hole.

[0024] As an optional solution of the above steam spray head, the cover assembly further includes a filter cover, the filter cover is arranged outside the spray head body and connected to the spray head body, a filter cavity is formed between the filter cover and the spray head body, the movable cover is arranged in the filter cavity, and a plurality of second filter holes are arranged on the filter cover;

[0025] The inner wall of the filter cover is provided with an inner corner, and the inner corner extends to the drainage inlet.

[0026] A cooking device comprises a cooking cavity, a water storage tank, a steam generator and the above-mentioned steam nozzle, wherein the steam nozzle is arranged in the cooking cavity, and the water storage tank, the steam generator and the steam nozzle are connected in sequence.

[0027] Beneficial effects of the utility model:

[0028] The steam nozzle provided by the utility model comprises a nozzle body and a cover assembly, wherein the cover assembly comprises an elastic member and a movable cover, wherein the elastic member is connected to the movable cover so that the movable cover can move relative to the nozzle body, so that the movable cover can cover the spray hole on the nozzle body under the push of the elastic member, thereby achieving the purpose of closing the spray hole; the movable cover can also overcome the elastic force of the elastic member under the push of steam in the cavity and open the spray hole, thereby adjusting the opening degree of the spray hole.

[0029] Through the above-mentioned arrangement, the spray hole can be opened after the steam pressure in the cavity reaches a certain pressure value, thereby ensuring that the steam entering the cooking cavity has a certain steam pressure and good fluidity, so that the steam entering the cooking cavity can fully flow in the cooking cavity, thereby improving the uniformity of the steam in the cooking cavity, shortening the time required for the steam to be evenly distributed in the cooking cavity, and being beneficial to evenly heating the ingredients, thereby improving the cooking effect and the taste of the food.

[0030] The cooking device provided by the utility model adopts the steam nozzle, so that the steam in the cooking cavity is evenly distributed and the temperature in the cooking cavity is even, so that the food can be evenly heated. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of the cooking device provided by the utility model;

[0032] Figure 2 It is a schematic diagram of the structure of the steam nozzle provided by the utility model when it is not assembled;

[0033] Figure 3 This is a front view of the nozzle body provided by the utility model;

[0034] Figure 4 yes Figure 3 Middle AA section view;

[0035] Figure 5It is a structural schematic diagram of the movable cover provided by the utility model;

[0036] Figure 6 It is a structural schematic diagram of the nozzle body provided by the utility model;

[0037] Figure 7 yes Figure 6 A partial enlarged view of point B in the middle;

[0038] Figure 8 It is a structural schematic diagram of the steam nozzle provided by the utility model;

[0039] Fig. 9 It is a structural schematic diagram of the filter cover provided by the utility model;

[0040] Fig.10 It is a schematic diagram of the structure after the movable cover and the filter cover provided by the utility model are assembled;

[0041] Fig.11 It is a cross-sectional view of the movable cover and the filter cover provided by the utility model after being assembled.

[0042] In the figure:

[0043] 100, cooking cavity; 200, water storage tank; 300, steam generator; 400, steam nozzle; 500, circulation pipe; 10, nozzle body; 11, injection end; 111, end face; 112, side face; 1121, spray hole; 12, drainage pipe joint; 13, air inlet pipe joint; 14, flow channel; 141, drainage inlet; 15, outer corner; 20, cover assembly; 21, movable cover; 211, end plate; 2111, guide hole; 212, side plate; 22, elastic member; 221, first elastic member; 222, second elastic member; 23, filter cover; 231, top plate; 232, first plate; 233, second plate; 2331, avoidance gap; 234, inner corner; 235, guide column. DETAILED DESCRIPTION

[0044] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0045] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0047] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0048] This embodiment provides a cooking device such as Figure 1 As shown, the cooking device includes a main body, a steam generator 300, a water storage tank 200 and a steam nozzle 400. A cooking cavity 100 is arranged in the main body, and the steam generator 300 and the water storage tank 200 can be arranged outside the cooking cavity 100. The water storage cavity, the steam generator 300 and the steam nozzle 400 are connected in sequence. The steam generator 300 is used to vaporize the water provided by the water storage tank 200 into steam, and the steam is passed into the cooking cavity 100 through the steam nozzle 400, so as to heat the food in the cooking cavity 100 by steam, so as to achieve the effect of cooking food. Among them, one end of the steam nozzle 400 provided with the spray hole 1121 extends into the cooking cavity 100, and the end of the steam nozzle 400 connected to the steam generator 300 is located outside the main body, so as to facilitate communication with the steam generator 300 through a pipeline.

[0049] It should be noted here that the cooking equipment can be a steamer, a steam-bake-in-one oven or a steam-air fryer, etc., which require the use of steam to process food. In this embodiment, a steamer is used as an example for specific introduction.

[0050] To improve the problem that the steam flowability is poor, resulting in uneven temperature in the cooking cavity 100, thereby affecting the heating effect of the food, etc. Figure 2 As shown, the steam nozzle 400 includes a nozzle body 10 and a cover assembly 20. A cavity is provided in the nozzle body 10, and the cavity is used to communicate with the steam generator 300. A spray hole 1121 connected to the cavity is provided on the nozzle body 10, and the steam entering the cavity flows out through the spray hole 1121. The cover assembly 20 is connected to the nozzle body 10, wherein the cover assembly 20 includes an elastic member 22 and a movable cover 21, and the elastic member 22 is connected to the movable cover 21, so that the movable cover 21 can move relative to the nozzle body 10, so that the movable cover 21 can cover the spray hole 1121 on the nozzle body 10 under the push of the elastic member 22, so as to achieve the purpose of closing the spray hole 1121, and the movable cover 21 can also overcome the elastic force of the elastic member 22 under the push of the steam in the cavity to open the spray hole 1121 and adjust the opening of the spray hole 1121.

[0051] When steam is not introduced into the cavity, the movable cover 21 is not pushed by the steam, and the movable cover 21 abuts against the nozzle body 10 under the action of the elastic member 22 to close the spray hole 1121 on the nozzle body 10, so that the cavity of the nozzle body 10 is not connected with the cooking cavity 100.

[0052] When the steam generator 300 is started and steam is introduced into the cavity, the steam pressure in the cavity gradually increases as the steam in the cavity increases; when the steam pressure in the cavity is less than a certain value (for example, a first preset pressure), the thrust of the steam on the movable cover 21 is less than the elastic force of the elastic member 22 on the movable cover 21, and the movable cover 21 is still in a state of closing the spray hole 1121, and the steam nozzle 400 does not spray steam.

[0053] When the steam pressure in the cavity is greater than the first preset pressure, the thrust of the steam in the cavity on the movable cover 21 is greater than the elastic force of the elastic member 22 on the movable cover 21. The movable cover 21 will overcome the elastic force of the elastic member 22 under the push of the steam and open the spray hole 1121, thereby injecting steam into the cooking cavity 100.

[0054] The steam nozzle 400 in this embodiment can open the spray hole 1121 after the steam pressure in the cavity reaches a first preset pressure, thereby ensuring that the steam entering the cooking cavity 100 has a certain steam pressure and good fluidity, so that the steam entering the cooking cavity 100 can fully flow in the cooking cavity 100, so as to improve the uniformity of the steam in the cooking cavity 100, shorten the time required for the steam to be evenly distributed in the cooking cavity 100, and facilitate uniform heating of the ingredients, thereby improving the cooking effect and the taste of the food.

[0055] When the steam generator 300 is working, steam will quickly leave the water vapor surface and bring out some water droplets. The small water droplets contained in the steam will be carried by the high-speed steam flow and dispersed in the entire steam flow. During the transportation process of saturated steam, heat loss is inevitable, and part of the steam condenses into small water droplets. Wet steam containing water will reduce the heat contained in the unit mass of steam. Thereby reducing the temperature of the cooking cavity 100 per unit area, making the food heated unevenly.

[0056] In order to solve the above problem, a plurality of first filter holes are provided on the movable cover 21, and at least part of the steam is ejected through the first filter holes. By providing the first filter holes, on the one hand, impurities can be filtered to prevent the impurities from entering the cooking cavity 100 along with the steam, and on the other hand, larger water droplets can be blocked to reduce the moisture entering the cooking cavity 100 along with the steam. By reducing the water droplets in the cooking cavity 100, the utilization rate of the temperature in the steam can be improved, which is conducive to improving the uniformity of the steam distribution in the cooking cavity 100, thereby ensuring the uniform temperature in the cooking cavity 100, heating the food evenly, and improving the cooking effect.

[0057] In order to make the steam diffuse evenly in the cooking cavity 100, the nozzle body 10 is provided with a plurality of spray holes 1121, and at least two spray holes 1121 have different spray directions. By providing the spray holes 1121 with different spray directions, the steam can be introduced at multiple angles, so that the steam diffuses evenly in the cooking cavity 100.

[0058] To increase the steam spraying direction of the steam spray head 400, the spray head body 10 includes at least two spraying surfaces arranged at an angle, each of which is provided with a spray hole 1121. Alternatively, multiple spray holes 1121 can be arranged at intervals along the circumference of the spray head body 10, which can also achieve the purpose of increasing the spraying direction.

[0059] like Figure 3 and Figure 4 As shown, in this embodiment, the nozzle body 10 includes a spray end 11, and the spray end 11 is in a prism shape. Specifically, one end of the spray end 11 is narrow and the other end is wide; the spray end 11 includes an end face 111 and a plurality of side faces 112 connected to the end face 111, the end face 111 is located at the narrow end of the spray end 11, each side of the end face 111 is connected to a side face 112, and the side face 112 extends obliquely from the narrow end to the wide end, and each side face 112 is provided with a spray hole 1121. In the nozzle body 10 of this structure, the plurality of spray holes 1121 are arranged around the circumference of the nozzle body 10, so that steam can be sprayed around the circumference, and the spray direction is increased, so that the steam can flow evenly to various places of the cooking cavity 100.

[0060] like Figure 3As shown, the shape of the end face 111 is a regular hexagon, and the shape of the side face 112 is an isosceles trapezoid, which is conducive to making the distribution of the spray holes 1121 more uniform, so as to improve the uniformity of steam injection. In other embodiments, the end face 111 can also be a non-regular deformation, and the shape of the end face 111 can be a triangle, rectangle, pentagon, heptagon or other polygon.

[0061] Optionally, a spray hole 1121 may also be provided on the end surface 111 to increase the steam spraying area and increase the spraying direction.

[0062] In other embodiments, only part of the side surfaces 112 may be provided with the spray holes 1121; at least two spray holes 1121 may be provided on each side surface 112, and the arrangement of the at least two spray holes 1121 on each side surface 112 may be the same or different, and may be adjusted according to actual needs.

[0063] In some embodiments, the nozzle body 10 may be cylindrical, frustum-shaped or conical, and a plurality of spray holes 1121 may be circumferentially spaced apart and arranged on the circumferential side surface 112 of the cylindrical surface, conical surface or frustum-shaped surface.

[0064] like Figure 4 As shown, an air inlet pipe joint 13 is formed at one end of the nozzle body 10 away from the injection end 11 , and the air inlet pipe joint 13 is used to be connected to a pipeline to communicate with the steam generator 300 through the pipeline.

[0065] In order to improve the shielding effect of the movable cover 21 on the spray hole 1121 on the spray head body 10, the shape of the movable cover 21 can be adapted to the shape of the spray end 11. Figure 5 As shown, the movable cover 21 includes an end plate 211 and a plurality of side plates 212 connected to the end plate 211. The end plate 211 is arranged in parallel with the end surface 111, and each side edge of the end plate 211 is connected to a side plate 212, and the side plates 212 correspond to the side surfaces 112 one by one and are arranged in parallel. When the movable cover 21 closes the spray hole 1121, the end plate 211 covers the end surface 111 of the spray head body 10, and the side plates 212 cover the corresponding side surfaces 112 of the spray head body 10 to close the spray hole 1121. This arrangement can also improve the relative position accuracy of the spray head body 10 and the movable cover 21 when the steam spray head 400 is in a closed state, so that the movable cover 21 can be stably maintained at the position of closing the spray hole 1121.

[0066] In this embodiment, the end plate 211 is a mesh plate, and a plurality of first filter holes are provided on the end plate 211. By providing the first filter holes on the end plate 211, the side plate 212 can be a non-porous plate, thereby improving the shielding effect of the side plate 212 on the spray hole 1121, and preventing the steam spray head 400 from leaking when it is closed.

[0067] After the steam enters the cavity of the nozzle body 10, part of the water carried therein will condense into water droplets. In order to avoid water retention in the nozzle body 10, the nozzle body 10 also includes a drain port connected to the cavity, and the water in the cavity can be discharged through the drain port.

[0068] Optionally, the drain outlet may be connected to the water storage tank 200 via a circulation pipe 500 to achieve water reuse.

[0069] Optionally, a drain port is provided at the bottom of the nozzle body 10 to facilitate the water in the cavity to be discharged through the drain port, thereby improving the water drainage effect.

[0070] Optionally, the nozzle body 10 includes a drain pipe connector 12 disposed around the drain outlet, and the drain pipe connector 12 is used to connect the circulation pipe 500 .

[0071] When the movable cover 21 opens the spray hole 1121, the steam in the nozzle body 10 enters between the injection end 11 and the movable cover 21 through the spray hole 1121, part of the steam is sprayed out through the first filter hole, and a small part of the steam may be blocked by the side plate 212, so that the surface of the side plate 212 may condense into water droplets, and some of the water droplets will drip on the side 112 of the nozzle body 10.

[0072] In order to reduce the probability of water drops on the outer wall of the nozzle body 10 falling into the cooking cavity 100, Figure 6 and Figure 7 As shown, a flow channel portion 14 is also provided on the outer wall of the nozzle body 10, and a drainage channel is provided in the flow channel portion 14, and the drainage channel is connected to the drain port. A drainage inlet 141 is provided at one end of the flow channel portion 14 extending toward the spray hole 1121. Water located on the outer wall of the nozzle body 10 can enter the drainage channel through the drainage inlet 141, and enter the drainage pipe joint 12 through the drainage channel, and enter the water storage tank 200 through the circulation pipe 500.

[0073] Among them, the flow channel part 14 is a protruding structure on the outer wall of the nozzle body 10, and one end of the flow channel part 14 extends to the drain pipe joint 12 to facilitate the internal connection between its internal drainage channel and the inside of the drain pipe joint 12; the other end of the flow channel part 14 extends toward the spray hole 1121.

[0074] Optionally, the flow channel portion 14 can be arranged on the outer corner 15 of the nozzle body 10. Since the drain port is located at the bottom of the nozzle body 10, when the water on the outer wall of the nozzle body 10 condenses into water droplets, the water droplets will flow downward along the outer wall of the nozzle body 10 under the action of gravity, and the water droplets are more likely to gather on the outer corner 15 and flow further along the outer corner 15. Therefore, the flow channel portion 14 is arranged on the outer corner 15, which can facilitate the water flow to flow along the outer corner 15 and enter the drainage channel through the drainage inlet 141.

[0075] In order to reduce the amount of water that enters the cooking cavity 100 along with the steam, the cover assembly 20 further includes a filter cover 23, which is disposed outside the nozzle body 10 and connected to the nozzle body 10, and a filter cavity is formed between the filter cover 23 and the nozzle body 10, and the injection end 11 and the movable cover 21 are both disposed in the filter cavity, wherein a plurality of second filter holes are disposed on the filter cover 23. Through the filter cover 23, the steam sprayed from the spray holes 1121 needs to pass through the filter cover 23 before entering the cooking cavity 100, which can block the water droplets carried in the steam on the one hand, and filter the impurities in the steam on the other hand, and prevent the impurities from entering the cooking cavity 100.

[0076] In order to allow the water accumulated in the filter cavity to be discharged through the drain port, the drainage inlet 141 of the flow channel portion 14 is located in the filter cavity to facilitate the water in the filter cavity to enter the drain port through the drainage channel.

[0077] Optionally, the inner wall of the filter cover 23 is provided with an inner corner 234, and the inner corner 234 is formed by two adjacent inner walls of the filter cover 23 that are set at an angle. The drainage inlet 141 is directly opposite to the inner corner 234, and the inner corner 234 extends to the drainage inlet 141 to facilitate the water in the filter cavity to enter the drainage channel through the drainage inlet 141 under the guiding effect of the inner corner 234.

[0078] Combination Figure 8 and Fig. 9 As shown, the edge of the filter cover 23 is provided with an avoidance notch 2331, and the avoidance notch 2331 is used to avoid the drain pipe joint 12. By providing the avoidance notch 2331, on the one hand, structural interference can be avoided, and on the other hand, positioning and foolproofing can be provided for the filter cover 23 and the nozzle body 10, so that the filter cover 23 and the nozzle body 10 can only be assembled at a specified angle, which can avoid assembly errors and improve the relative position accuracy of the nozzle body 10 and the filter cover 23.

[0079] like Fig. 9 As shown, the filter cover 23 includes a top plate 231, a plurality of first plates 232 and a plurality of second plates 233. The top plate 231 and the plurality of first plates 232 form a prism structure. Each side of the top plate 231 is connected to a first plate 232. The first plate 232 is tilted from the top plate 231, so that the top plate 231 is the upper and lower ends of the prism structure. The number of second plates 233 is the same as that of the first plates 232, and they are connected one by one. The second plates 233 are substantially perpendicular to the top plate 231. The avoidance notch 2331 is arranged at the edge of the second plate 233 away from the first plate 232.

[0080] In this embodiment, the first plate 232 and the top plate 231 are both mesh plates, that is, second filter holes are provided on the first plate 232 and the top plate 231. By setting the first plate 232 and the top plate 231 as mesh plates, it can be ensured that the steam ejected through the filter cover 23 has multiple ejection directions, so as to ensure that the steam is injected at multiple angles.

[0081] In some embodiments, the second plate 233 may also be configured as a mesh plate; or at least two of the first plate 232, the second plate 233 and the top plate 231 may be configured as mesh plates.

[0082] In order to enable the movable cover 21 to switch the opening and closing states of the spray holes 1121 under the action of steam and elastic force, the elastic member 22 elastically connects the movable cover 21 and the filter cover 23 to facilitate the arrangement of the elastic member 22 and simplify the structure and assembly.

[0083] Specifically, the elastic member 22 is located between the movable cover 21 and the filter cover 23 , one end of the elastic member 22 abuts against the movable cover 21 , and the other end abuts against the filter cover 23 , and the elastic member 22 applies an elastic force to the movable cover 21 away from the filter cover 23 .

[0084] To guide the movement of the movable cover 21, a guide post 235 is protruded on the inner wall of the filter cover 23, and a guide hole 2111 is provided on the movable cover 21. The guide post 235 is slidably inserted into the guide hole 2111. When the movable cover 21 moves, the movable cover 21 slides along the guide post 235, which can prevent the movable cover 21 from deviating and causing the movable cover 21 to be misaligned with the nozzle body 10.

[0085] Optionally, at least two guide posts 235 are provided. Fig.10 and Fig.11 As shown, there are four guide posts 235, which are evenly spaced along the circumference of the filter cover 23, so that the movable cover 21 is evenly stressed and moves more stably. In other embodiments, the number of guide posts 235 can be adjusted as needed.

[0086] In some embodiments, the guide column 235 may be protruded from the outer wall of the movable cover 21 , and correspondingly, the guide hole 2111 is provided on the filter cover 23 , which may also play a guiding role for the movable cover 21 .

[0087] To prevent the elastic force from deviating, the elastic member 22 may be sleeved outside the guide column 235 to improve the stability of the elastic force.

[0088] In some embodiments, a first positioning sleeve is provided on the movable cover 21, and a second positioning sleeve is provided on the filter cover 23. One end of the elastic member 22 extends into the first positioning sleeve, and the other end extends into the second positioning sleeve. Through the cooperation of the first positioning sleeve and the second positioning sleeve, the position of the elastic member 22 is fixed, and a guiding function can be provided for the elastic member 22.

[0089] Optionally, the first positioning sleeve may be disposed around the circumference of the guide hole 2111 , and the second positioning sleeve may be disposed around the guide column 235 , so that the elastic member 22 can be sleeved outside the guide column 235 .

[0090] In order to facilitate the elastic member 22 to abut against the movable cover 21 and the filter cover 23, the movable cover 21 has a first plane, the filter cover 23 has a second plane parallel to the first plane, and the elastic member 22 connects the first plane and the second plane. By setting two mutually parallel planes to cooperate with the elastic member 22, on the one hand, the abutment effect of the elastic member 22 on the movable cover 21 and the filter cover 23 can be ensured, which is convenient for assembly and conducive to the smooth reset of the movable cover 21; on the other hand, the elastic force of the elastic member 22 is perpendicular to the first plane, and the direction of the elastic force is determined, which can avoid the movable cover 21 from getting stuck.

[0091] Since different foods have different requirements for temperature and heating rate during the cooking process, some foods or cooking methods require the food to be slowly steamed at low temperature, while some foods or cooking methods require the food to be processed at high temperature. In order to meet the needs of users and different cooking methods, the opening of the spray hole 1121 in this embodiment can be controlled in sections to adjust the temperature change in the cooking cavity 100.

[0092] like Fig.11 As shown, the elastic member 22 includes two connected elastic bodies, namely a first elastic member 221 and a second elastic member 222, and the elastic coefficient of the first elastic member 221 is smaller than the elastic coefficient of the second elastic member 222. In other words, the critical force that tends to deform the first elastic member 221 is smaller than the critical force that tends to deform the second elastic member 222.

[0093] When steam is not introduced into the cavity, the movable cover 21 is not subjected to the thrust of steam, and the movable cover 21 will abut against the nozzle body 10 under the action of the first elastic member 221 and the second elastic member 222 to close the spray hole 1121 on the nozzle body 10, and the cavity of the nozzle body 10 is not connected with the cooking cavity 100.

[0094] When the steam generator 300 is started and steam is introduced into the cavity, the steam pressure in the cavity gradually increases as the steam in the cavity increases; when the steam pressure in the cavity is less than the first critical value (the first critical value is the critical value that tends to deform the first elastic member 221), the first elastic member 221 and the second elastic member 222 will not be compressed, the movable cover 21 is still in a state of closing the spray hole 1121, and the steam nozzle 400 does not spray steam.

[0095] When the steam generator 300 is started and is at the first power, the steam pressure in the cavity, at this time, the thrust of the steam in the cavity on the movable cover 21 is greater than the first critical value and less than the second critical value (the second critical value is the critical value that tends to deform the second elastic member 222), the force applied by the steam on the movable cover 21 is greater than the elastic force of the elastic member 22 on the movable cover 21, the first elastic member 221 will be compressed, and the movable cover 21 will overcome the elastic force of the elastic member 22 under the push of the steam and open the spray hole 1121, thereby injecting steam into the cooking cavity 100. When the force on the movable cover 21 is balanced, the spray hole 1121 is at the first opening. At this time, the spray hole 1121 is not in a fully open state, the flow rate of the steam entering the cooking cavity 100 is relatively small, and the temperature in the cooking cavity 100 is relatively low, so the food can be processed at a low temperature.

[0096] When the power of the steam generator 300 is increased to the second power, since the second power is greater than the first power, the steam pressure in the cavity increases, and the thrust of the steam in the cavity on the movable cover 21 is greater than the second critical value. At this time, the second elastic member 222 will be compressed, and the movable cover 21 will be further away from the nozzle body 10 to further open the spray hole 1121. When the force on the movable cover 21 is balanced, the spray hole 1121 is located at the second opening, and the second opening is greater than the first opening. In this state, the flow rate of the steam entering the cooking cavity 100 is relatively large, and the temperature in the cooking cavity 100 is relatively high, so that the food can be processed at high temperature.

[0097] Optionally, the second critical value may be 2-5 times of the first critical value, such as 2 times, 3 times, 4 times or 5 times. Taking the second critical value as 3 times of the first critical value as an example, when the first critical value is 1N, which is equivalent to a pressure of 0.102Kg to compress the first elastic member 221, the second critical value needs to be 3N, which is equivalent to a pressure of 0.306Kg to compress the second elastic member 222.

[0098] In this embodiment, by configuring the elastic member 22 as two elastic bodies with increasing elastic coefficients, the temperature in the cooking cavity 100 can be controlled in stages, so as to adjust the temperature change in the cooking cavity 100 according to different cooking modes. The temperature control in stages can be adjusted by adjusting the power of the steam generator 300.

[0099] In this embodiment, two elastic bodies are provided, the elastic body with a smaller elastic coefficient is connected to the movable cover 21, and the elastic body with a larger elastic coefficient is connected to the filter cover 23. In other embodiments, the elastic body with a smaller elastic coefficient can be connected to the filter cover 23, and correspondingly, the elastic body with a larger elastic coefficient is connected to the movable cover 21.

[0100] In some embodiments, three, four or more elastic bodies may be provided to achieve multi-stage graded control of temperature, and the specific number of elastic bodies may be adjusted according to actual needs.

[0101] Optionally, a connector is provided between two adjacent elastic bodies, and the connector connects the elastic bodies on both sides respectively. By providing the connector, the two adjacent elastic bodies can be connected in series, avoiding the problem that the contact area is small when the two elastic bodies are directly connected, resulting in an unreliable connection, thus causing the two elastic bodies to be disengaged, the elastic force direction is not parallel, and other problems.

[0102] In some embodiments, the elastic member 22 may also be disposed between the movable cover 21 and the nozzle body 10. Specifically, one end of the elastic member 22 abuts against the nozzle body 10, and the other end abuts against the movable cover 21. The elastic force applied by the elastic member 22 to the movable cover 21 is a pulling force, so that the elastic force can drive the movable cover 21 away from the filter cover 23 and close to the nozzle body 10.

[0103] In some embodiments, the cooking device may be provided with at least two steam spray heads 400, and steam may be quickly and evenly introduced into the cooking cavity 100 by providing at least two steam spray heads 400. Optionally, the at least two steam spray heads 400 may be symmetrically arranged at both ends of the cooking cavity 100; the steam spray heads 400 at both ends of the cooking cavity 100 may also be staggered, and when the steam outflow angle of the steam spray head 400 at one end of the cooking cavity 100 fails to meet the uniform distribution of steam to the greatest extent, the uneven steam distribution may be compensated by staggering the steam spray head 400 at the other end.

[0104] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A steam nozzle, characterized in that: include: A nozzle body (10), wherein a cavity is arranged inside the nozzle body (10), and a spray hole (1121) communicating with the cavity is arranged on the nozzle body (10); A cover assembly (20), wherein the cover assembly (20) is connected to the nozzle body (10), and the cover assembly (20) comprises an elastic member (22) and a movable cover (21), wherein the elastic member (22) is connected to the movable cover (21), and the movable cover (21) is configured to cover the spray hole (1121) when pushed by the elastic member (22), or to open the spray hole (1121) when pushed by steam in the cavity.

2. The steam nozzle according to claim 1, characterized in that: The elastic member (22) comprises at least two elastic bodies connected in sequence, and along the arrangement direction of the spray head body (10) and the movable cover (21), the elastic coefficients of the at least two elastic bodies increase or decrease in sequence.

3. The steam nozzle according to claim 2, characterized in that: The elastic body is a spring, and at least one of the wire diameter, diameter and effective number of turns of two adjacent elastic bodies is different; And / or, a connecting piece is provided between two adjacent elastic bodies, and the connecting piece connects the elastic bodies at both sides respectively.

4. The steam spray head according to any one of claims 1 to 3, characterized in that: The cover assembly (20) further comprises a filter cover (23), wherein the filter cover (23) is disposed outside the nozzle body (10) and is connected to the nozzle body (10), a filter cavity is formed between the filter cover (23) and the nozzle body (10), the movable cover (21) is disposed in the filter cavity, and a plurality of second filter holes are provided on the filter cover (23).

5. The steam nozzle according to claim 4, characterized in that: The elastic member (22) elastically connects the nozzle body (10) and the movable cover (21); Alternatively, the elastic member (22) elastically connects the movable cover (21) and the filter cover (23).

6. The steam nozzle according to claim 5, characterized in that: The movable cover (21) includes a first plane, the outer wall of the nozzle body (10) or the inner wall of the filter cover (23) includes a second plane parallel to the first plane, and the elastic member (22) connects the first plane and the second plane; And / or, a first positioning sleeve is provided on the movable cover (21), a second positioning sleeve is provided on the outer wall of the nozzle body (10) or the inner wall of the filter cover (23), one end of the elastic member (22) extends into the first positioning sleeve, and the other end of the elastic member (22) extends into the second positioning sleeve.

7. The steam nozzle according to claim 5, characterized in that: One of the filter cover (23) and the movable cover (21) is provided with a guide column (235), and the other is provided with a guide hole (2111), and the guide column (235) is slidably inserted into the guide hole (2111).

8. The steam nozzle according to claim 7, characterized in that: The elastic member (22) is sleeved outside the guide column (235); And / or, a plurality of guide posts (235) are provided, and the plurality of guide posts (235) are evenly spaced along the circumference of the filter cover (23).

9. The steam spray head according to any one of claims 1 to 3, characterized in that: The movable cover (21) is provided with a plurality of first filtering holes; And / or, a plurality of the spray holes (1121) are provided on the spray head body (10), and the spray directions of at least two of the spray holes (1121) are different.

10. The steam spray head according to any one of claims 1 to 3, characterized in that: The bottom of the nozzle body (10) is provided with a drainage port which is in communication with the cavity.

11. The steam spray head according to claim 10, characterized in that: The outer wall of the nozzle body (10) is provided with a flow channel portion (14), a drainage channel is provided inside the flow channel portion (14), the drainage channel is connected to the drain port, and a drainage inlet (141) is provided at one end of the flow channel portion (14) extending toward the spray hole (1121).

12. The steam spray head according to claim 11, characterized in that: The cover assembly (20) further comprises a filter cover (23), the filter cover (23) being arranged outside the nozzle body (10) and connected to the nozzle body (10), a filter cavity being formed between the filter cover (23) and the nozzle body (10), the movable cover (21) being arranged in the filter cavity, and a plurality of second filter holes being arranged on the filter cover (23); An inner corner (234) is provided on the inner wall of the filter cover (23), and the inner corner (234) extends to the drainage inlet (141).

13. A cooking device, characterized in that: The invention comprises a cooking cavity (100), a water tank (200), a steam generator (300) and a steam nozzle as claimed in any one of claims 1 to 12, wherein the steam nozzle is arranged in the cooking cavity (100), and the water tank (200), the steam generator (300) and the steam nozzle are connected in sequence.

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