CN212996096U - Steam cooking appliance - Google Patents

Abstract

The utility model provides a steam cooking appliance, which relates to the technical field of kitchen appliances and comprises a steam box body, wherein the steam box body comprises a cooking cavity, a cooking area for placing food materials is arranged in the cooking cavity, and the steam cooking appliance also comprises a steam generator, a conveying pipeline and a pressure increasing valve component; the delivery pipeline is connected between a steam output end of the steam generator and the booster valve assembly, the booster valve assembly is provided with steam jet holes, and the steam jet holes are arranged corresponding to the cooking area so that steam jetted from the steam jet holes is jetted to the cooking area. This steam cooking electrical apparatus effectively alleviates current steam cooking electrical apparatus at the culinary art in-process, and steam is full of earlier and cooks the cavity, and inside the heat just transmits to eating the material from eating the material surface to lead to the lower technical problem of cooking efficiency.

Description

Steam cooking appliance

Technical Field

The utility model belongs to the technical field of the kitchen appliance technique and specifically relates to a steam cooking appliance is related to.

Background

At present, in the cooking process of steam cooking appliances with cooking functions such as an electric steam box, an all-in-one machine for steaming and roasting, a micro-all-in-one machine for steaming and the like, steam is full of a cooking cavity of the electric steam box in a diffusion mode, food materials are placed in the central area of the cooking cavity, namely, the cooking area, and the volume of the food materials only occupies a small part of the cooking cavity. Therefore, in the cooking process, the steam is filled in the cooking cavity at first to be fully contacted with food, and the steam is condensed on the surface of the food to release heat and transfer the heat from the surface of the food to the interior of the food.

However, in the above cooking process, the steam needs to fill the cooking cavity first, and then the heat is transferred from the surface of the food material to the inside, which substantially reduces the cooking efficiency of the food material.

Based on the above problem, the utility model provides a higher steam cooking device of culinary art efficiency seems to be especially crucial.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a steam cooking appliance to alleviate current steam cooking appliance at the culinary art in-process, steam is full of the culinary art cavity earlier, and inside the heat just transmits the edible material from eating the material surface after, thereby leads to the lower technical problem of culinary art efficiency.

The utility model provides a steam cooking appliance, which comprises a steam box body, wherein the steam box body comprises a cooking cavity, and a cooking area for placing food materials is arranged in the cooking cavity;

the steam cooking appliance further comprises a steam generator, a conveying pipeline and a pressure increasing valve assembly;

the delivery pipeline is connected between a steam output end of the steam generator and the booster valve assembly, the booster valve assembly is provided with steam jet holes, and the steam jet holes are arranged corresponding to the cooking area so that steam jetted from the steam jet holes is jetted to the cooking area.

Further, the pressure increasing valve assembly comprises a valve seat, a valve core and a spray head with the steam spray hole;

the valve seat is provided with a channel communicated with the conveying pipeline, the spray head is arranged on the valve seat, and the steam spray holes are communicated with the channel;

the valve core is suitable for being matched with the channel and has the tendency of blocking the channel, and the steam generated by the steam generator can push the valve core to be opened relative to the channel so as to enable the steam to be sprayed to the cooking area through the steam spraying hole.

Further, the valve core is movably arranged in the channel;

the pressure increasing valve assembly further comprises a return spring, and the return spring is arranged in the channel and connected between the valve core and the spray head so that the valve core can block the channel.

Further, the channel comprises a first section and a second section which are communicated with each other, and the cross-sectional area of the first section adjacent to the second section is smaller than that of the second section adjacent to the first section, so that the connection part of the first section and the second section forms a step;

the valve core is movably arranged in the second section, and the return spring can drive the valve core to tightly abut against the step.

Furthermore, a chamfer is arranged at the position of the step to form a first annular inclined surface, the valve core is provided with a second annular inclined surface, and the return spring can drive the second annular inclined surface to tightly abut against the first annular inclined surface.

Further, the valve core comprises a plugging part and a mounting part which are integrally arranged;

one end of the return spring is sleeved on the mounting part and abuts against the end face, close to the mounting part, of the blocking part;

the second annular inclined surface is arranged on the blocking part.

Further, the valve seat is connected with the spray head through threads.

Further, the pressure increasing valve assembly is arranged at the top of the cooking cavity, and the steam jet hole is positioned above the cooking area.

Further, the booster valve assembly includes a first steam injection hole capable of injecting steam directly downward;

and/or the booster valve assembly includes a second steam injection hole capable of injecting steam obliquely downward.

Further, the booster valve assembly comprises a plurality of second steam jet holes which are arranged around the vertical axis, and the included angle between the axis of the second steam jet holes and the vertical axis ranges from 15 degrees to 60 degrees.

Has the advantages that:

the utility model provides a pair of steam cooking appliance, including the steam ager body, wherein, the steam ager body includes the culinary art cavity, has the culinary art region that is used for placing edible material in the culinary art cavity to, this steam cooking appliance still includes steam generator, pipeline and pressure boost valve subassembly. Specifically, the steam output end of the steam generator is communicated with one end of the conveying pipeline, the other end of the conveying pipeline is communicated with the inlet of the pressure increasing valve assembly, the pressure increasing valve assembly is provided with steam jet holes, and the steam jet holes are arranged corresponding to the cooking area so as to be capable of jetting steam to the cooking area.

The utility model provides a steam cooking appliance's theory of operation does: steam generator during operation produces a large amount of steam, steam is along conveying line flow direction pressure valve subassembly, steam receives pressure valve subassembly's supercharging effect and formation pressure steam when the pressure valve subassembly, pressure steam can spout to the culinary art region via the steam orifice, with the surface of the edible material of placing in the culinary art region through pressure steam impact, and pressure steam is progressively permeated the edible material inside and is condensed and release the heat through eating the material surface, the inside temperature of edible material has directly been improved, and then heat transmission efficiency has been improved, that is, the cooking efficiency of steam cooking electrical apparatus has been improved.

To sum up, through using the pressure valve subassembly to steam cooking electrical apparatus in for pressure steam can directly spout to the edible material in culinary art region, and make steam can be inside from eating material surface infiltration under the pressure effect, inside with directly transmitting the heat to eating material, replaced among the prior art ordinary steam to be full of the culinary art cavity and heated the mode of eating the material, thereby improved steam cooking electrical apparatus culinary art efficiency of eating the material greatly.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a steam cooking appliance according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a booster valve assembly according to an embodiment of the present invention;

fig. 3 is a partial schematic view of fig. 1 at a.

Icon:

110-a housing; 120-a cooking cavity; 130-a cooking plate;

210-a steam generator; 220-a delivery line; 230-a booster valve assembly; 231-a valve seat; 2311-a channel; 2312-a first annular chamfer; 232-valve core; 2321-a sealing part; 2322-second annular chamfer; 2323-an installation part; 233-spray head; 2331-steam injection; 234-return spring; 240-joint.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 to 3, the present embodiment provides a steam cooking appliance, which specifically includes a steam box body, the steam box body includes a cooking cavity 120, a cooking area for placing food materials is provided in the cooking cavity 120, and of course, the steam cooking appliance further includes a steam generator 210 and a conveying pipeline 220, so that when in use, the steam generator 210 works to generate a large amount of high-temperature steam, and the steam is conveyed to the cooking cavity 120 through the conveying pipeline 220 to heat the food materials. In order to further improve the heating effect of the steam on the food material, in this embodiment, the pressure increasing valve assembly 230 is disposed at the air outlet end of the conveying pipeline 220, the pressure increasing valve assembly 230 has a steam injection hole 2331, and the steam injection hole 2331 is disposed corresponding to the cooking area, so that the high-temperature steam generated by the steam generator 210 is conveyed to the pressure increasing valve assembly 230 through the conveying pipeline 220, the steam is pressurized by the pressure increasing valve assembly 230 to form pressure steam, and can be rapidly injected to the cooking area from the steam injection hole 2331 to impact the surface of the food material placed in the cooking area through the pressure steam, and the pressure steam gradually permeates into the food material through the surface of the food material to be condensed to release heat, thereby directly improving the temperature inside the food material, further improving the heat transmission efficiency, that is, and improving the cooking efficiency of the steam cooking appliance.

To sum up, through in applying pressure valve subassembly 230 to steam cooking electrical apparatus for pressure steam can directly spout to the edible material in cooking area, and make steam can permeate inside from eating the material surface under the pressure effect, inside with heat direct transfer to eating the material, replaced among the prior art ordinary steam to be full of cooking cavity 120 and the mode of heating the edible material, thereby improved steam cooking electrical apparatus cooking food material's efficiency greatly.

To further clarify the operation of the cooking chamber, the booster valve assembly 230 and other related structures will be described in detail below, in particular:

the pressure increasing valve assembly 230 in this embodiment includes a valve seat 231, a valve core 232, and a spray head 233 having a steam spray hole 2331, wherein the valve seat 231 has a channel 2311 communicating with the delivery pipe 220, the spray head 233 is mounted on the valve seat 231, and the steam spray hole 2331 on the spray head 233 communicates with the channel 2311; further, the valve element 232 is disposed in cooperation with the channel 2311 and tends to block the channel 2311 in real time, so that in a normal state, the valve element 232 can block the channel 2311, when a large amount of steam is generated by the steam generator 210, the pressure of the steam in the delivery pipe 220 and the channel 2311 is gradually increased, and when the pressure reaches a certain degree, the valve element 232 opens the channel 2311, and at the moment, the steam can flow to the nozzle 233 through the channel 2311 and is sprayed to a cooking area through the steam spraying hole 2331 on the nozzle 233, so that the food can be cooked through the pressure steam.

It should be noted here that the tendency of the valve element 232 to block the passage 2311 can be understood as follows: the valve core 232 may be a deformable structure, and a pressure hole is formed thereon, and in a normal state, the pressure hole is closed to block the passage 2311, and when the pressure in the passage 2311 reaches a certain degree, a material around the pressure hole deforms to open the pressure hole, so that the passage 2311 is opened, and pressure steam is released.

Of course, in addition to the above embodiments, the present embodiment adopts a more preferred embodiment, specifically: the valve core 232 is movably disposed in the channel 2311, and the channel 2311 is disposed therein with a return spring 234, one end of the return spring 234 is connected with the valve core 232, and the other end is connected with the inner wall of the spray nozzle 233, so that, in a normal state, under the elastic force of the return spring 234, the valve core 232 is pressed against the channel 2311, thereby realizing the sealing of the channel 2311, when the pressure in the channel 2311 reaches a certain degree, that is, the pressure is greater than the elastic force of the return spring 234, the valve core 232 starts to move, and at the same time, the return spring 234 contracts, and at this time, the valve core 232 opens the channel 2311, so that the pressure steam can flow to the steam spray hole 2331 through the channel 2311, and is sprayed to the food material in. From this, through return spring 234 to case 232's effect for case 232 has certain pretension effect and shutoff passageway 2311, and then, makes passageway 2311 and even the steam in the conveying pipeline 220 produce certain pressure, and steam still has certain pressure when releasing, has realized the effect of eating the material through pressure steam heating from this, has further promoted the culinary art efficiency of eating the material.

As a further preferred embodiment, the channel 2311 in this embodiment includes a first section and a second section that are communicated with each other, wherein the cross-sectional area of the first section is smaller than that of the second section, so that a step is formed at the joint of the first section and the second section, the valve element 232 is slidably disposed in the second section, and the return spring 234 is also disposed in the second section, so that, under the elastic force of the return spring 234, one end of the valve element 232 away from the return spring 234 abuts against the step in a normal state, and when the steam pressure in the first section is small, the valve element 232 abuts against the step, on one hand, the valve element 232 seals the channel 2311 at the step, and on the other hand, the step can also limit the valve element 232 to prevent the valve element 232 from entering the first section; when the steam is converged in the delivery pipe 220 and the first section to cause the steam pressure to rise to a certain degree, the valve element 232 gradually disengages from the step to gradually open the step, so that the pressure steam can flow into the second section along the gap between the step and the valve element 232 and is sprayed to the food material in the cooking area through the steam spraying hole 2331 to heat the food material.

Specifically, referring to fig. 3, the first section is L-shaped, the second section is linear, one end of the first section is connected to the conveying pipeline 220 through the joint 240, and the other end is in butt joint with the second end, because the cross-sectional area of the other end of the first section is smaller than that of the second section, a step is formed at the joint of the first section and the second section, and the valve element 232 can abut against the step to block the channel 2311.

It should be noted that, during the operation of the cooking box, the steam generator 210 generates steam in real time, and the steam entering the second section is pressure steam under the action of the valve core 232 and the return spring 234, so that the steam sprayed to the food material in the cooking area through the steam spraying hole 2331 is also pressure steam, thereby improving the cooking efficiency.

Of course, in other embodiments, the valve element 232 may also be used to close off the end of the channel 2311, and the operation principle is similar to that described above and will not be described in detail here.

As a further preferable implementation manner, a chamfer is provided at a position of the step in this embodiment, so that a first annular inclined surface 2312 is formed at the position, a large end of the first annular inclined surface 2312 is opened toward the second section, and correspondingly, a second annular inclined surface 2322 is provided at a position of the valve core 232 for blocking the channel 2311, so that the valve core 232 can abut against the step under the elastic force of the return spring 234, so that the second annular inclined surface 2322 and the first annular inclined surface 2312 are attached to each other, thereby ensuring that no air leakage occurs between the valve core 232 and the step, and ensuring that a sufficient steam pressure exists in the first section. Of course, theoretically, the embodiment that the first annular inclined surface 2312 is formed at the step or the valve core 232 is provided with the second annular inclined surface 2322 is also beneficial to the abutting between the valve core 232 and the step, but in the two embodiments, the contact area between the valve core 232 and the step is relatively smaller than the contact area between the first annular inclined surface 2312 and the second annular inclined surface 2322, and a gas leakage phenomenon is likely to occur, so that in order to ensure the pressure of the steam in the delivery pipe 220 and the first section of the passage 2311, the first annular inclined surface 2312 and the second annular inclined surface 2322 are preferably used in cooperation.

As a further preferable embodiment, the valve element 232 in the present embodiment includes a blocking portion 2321 and a mounting portion 2323, which are integrally provided, wherein a cross-sectional area of a connection portion of the blocking portion 2321 and the mounting portion 2323 is larger than a cross-sectional area of a connection portion of the mounting portion 2323 and the blocking portion 2321, so as to form a stepped structure at the connection portion of the two; in further consideration of the installation situation of the return spring 234, in this embodiment, one end of the return spring 234 is directly sleeved on the installation part 2323, and the end of the return spring 234 abuts against the end surface of the blocking part 2321, so as to ensure that the return spring 234 has a certain elastic force effect on the valve element 232; the second annular inclined surface 2322 is disposed around a side of the blocking portion 2321 facing away from the return spring 234.

As a further preferred embodiment, in the present embodiment, the valve seat 231 and the nozzle 233 are connected by a screw, specifically, an external thread is provided on the outer side of the second section of the valve seat 231, and correspondingly, an internal thread is provided on the nozzle 233, so that the nozzle 233 is screwed on the external thread of the valve seat 231 by the internal thread to realize the installation of the nozzle 233 and the valve seat 231. Of course, in other embodiments, the valve seat 231 may be provided with an internal thread, and the nozzle 233 may be provided with an external thread, which can also achieve the installation of the nozzle 233 and the valve seat 231.

It should be noted that when the nozzle 233 is screwed to the valve seat 231, the second section of the valve seat 231 can communicate with the inner cavity of the nozzle 233, and the steam injection holes 2331 of the nozzle 233 communicate with the second section of the channel 2311 through the inner cavity, so that the pressure steam is injected from the steam injection holes 2331.

As a further preferred embodiment, the pressure increasing valve assembly 230 of this embodiment is disposed at the top of the cooking cavity 120, and the steam injection hole 2331 is located above, preferably right above, the cooking area, specifically, the top of the cooking cavity 120 is provided with a mounting hole, and a part of the valve seat 231 penetrates through the mounting hole and is fixed at the top of the cooking cavity 120; further, the top and a side of the cooking cavity 120 are provided with an installation space for accommodating the parts of the structure of the delivery pipe 220, the steam generator 210 and the valve seat 231, so as to ensure that the steam generated by the steam generator 210 can be delivered into the valve seat 231 of the pressure increasing valve assembly 230 through the delivery pipe 220, and further can be sprayed out from the steam spraying holes 2331, specifically, the steam generator 210 is arranged in the installation space enclosed by the side of the cooking cavity 120 and the housing 110, and the delivery pipe 220 is partially located in the installation space at the side of the cooking cavity 120, and is also partially located in the installation space at the top of the cooking cavity 120. Therefore, the arrangement of the booster valve assembly 230 at the top of the cooking cavity 120 can effectively alleviate the problem that the cooking plate 130 blocks the pressure steam when arranged at the bottom, and effectively alleviate the problem that the pressure steam coverage rate at the back is small and only covers a part of the food material.

It should be noted that, considering the layout of the conveying pipeline 220 and the arrangement of the pressure increasing valve assembly 230, the second section of the channel 2311 is arranged in the vertical direction in the present embodiment, the first section is L-shaped, one end of the L-shaped first section is connected to the conveying pipeline 220 through the joint 240, and the other end is connected to the second section. Preferably, the joint 240 is connected with the first section of the valve seat 231 through a screw thread, so that the assembly and disassembly are convenient. In addition, the steam generator 210 generates steam by boiling water, although the specific operation principle thereof can be referred to the prior art and will not be described in detail herein.

As a further preferred embodiment, the steam nozzle 2331 in this embodiment is divided into a first steam nozzle and a second steam nozzle, and specifically includes the following forms:

first, the pressurizing valve assembly 230 may include only a first steam injection hole through which pressure steam can be injected toward the lower food material in a vertical direction, and in this case, the first steam injection hole may be a large hole or a plurality of small holes formed in the bottom wall of the nozzle 233. Of course, the injection area of the pressurized steam is relatively small in this manner.

Secondly, the booster valve assembly 230 may include only a second steam injection hole through which the pressure steam can be injected obliquely downward, and the number of the second steam injection holes may be one or more, and in this case, the second steam injection hole is formed at a connection portion between the bottom wall and the sidewall of the nozzle 233.

Thirdly, the boost valve assembly 230 may include both the first steam injection hole and the second steam injection hole, and of course, in consideration of the injection area involved by the pressure steam, it is preferable in this embodiment that the first steam injection hole and the second steam injection hole are opened in plural, or the first steam injection hole is opened in one, and the second steam injection hole is opened in plural.

Further preferably, the first steam injection hole is one and located at a central position of the bottom wall of the nozzle 233, and the second steam injection holes are plural, and the plural second steam injection holes are arranged around the first steam injection hole centering on the first steam injection hole located at the central position of the bottom wall of the nozzle 233, and an axis of each of the second steam injection holes forms an angle θ with a vertical axis of the first steam injection hole, preferably, the angle θ ranges from 15 ° to 60 °, that is, an angle between axes of two second steam injection holes symmetrical with respect to the vertical axis is 30 ° to 120 °, specifically including: 30 degrees, 60 degrees, 70 degrees, 80 degrees, 90 degrees, 100 degrees, 110 degrees, 120 degrees and the like, and further preferably, the included angle theta is 20-40 degrees, and particularly, the included angle theta can be 20 degrees, 30 degrees or 40 degrees by comprehensively considering the height of the cavity and the width and the depth of the horizontal direction, so that the pressure steam can cover the food materials in the cooking area and can be used for concentrated steam cooking, and the steam dispersion is avoided.

The specific pressurizing process of the cooking box provided by the embodiment is as follows:

when the steam generator 210 works, a large amount of steam is generated by boiling water and enters the valve seat 231 through the conveying pipeline 220, due to the elastic force action of the return spring 234, the valve core 232 abuts against the step position of the channel 2311, so that the steam is blocked by the valve core 232, along with the continuous accumulation of the steam generated by the steam generator 210, the steam is gathered and compressed in the steam generator 210 and the conveying pipeline 220 to generate pressure, therefore, when the thrust force of the steam acting on the valve core 232 is greater than the return elastic force of the return spring 234, the valve core 232 is pushed to be opened, at the moment, the steam is sprayed into a cooking area through the spray nozzle 233, and the pressure steam gradually permeates into the food material after impacting the surface of the food material to be condensed and released heat, so that the internal temperature of the food material is improved. Because the steam generator 210 continuously generates steam, the pressure in the delivery pipe 220 is maintained, and the steam overcomes the return acting force of the return spring 234 to keep the steam at a certain pressure; after the steam generator 210 stops working, there is not enough steam to maintain the pressure in the delivery pipe 220 to overcome the elastic force of the return spring 234, and the valve element 232 continues to abut against the step of the valve seat 231, so that the steam is blocked.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (10)

1. A steam cooking appliance comprising a steam box body, wherein the steam box body comprises a cooking cavity (120), and a cooking area for placing food materials is arranged in the cooking cavity (120), and the steam cooking appliance is characterized by further comprising a steam generator (210), a conveying pipeline (220) and a pressure increasing valve assembly (230);

the delivery pipe (220) is connected between a steam output end of the steam generator (210) and the booster valve assembly (230), the booster valve assembly (230) is provided with a steam jet hole (2331), and the steam jet hole (2331) is arranged corresponding to the cooking area so that the steam jetted through the steam jet hole (2331) is jetted to the cooking area.

2. Steam cooking appliance according to claim 1, characterised in that the booster valve assembly (230) comprises a valve seat (231), a valve core (232) and a nozzle head (233) with the steam injection holes (2331);

the valve seat (231) is provided with a channel (2311) communicated with the conveying pipeline (220), the spray head (233) is installed on the valve seat (231) and the steam spray hole (2331) is communicated with the channel (2311);

the valve core (232) is suitable for being matched with the channel (2311) and has the tendency of blocking the channel (2311), and the steam generated by the steam generator (210) can push the valve core (232) to be opened relative to the channel (2311) so as to enable the steam to be sprayed to the cooking area through the steam spraying hole (2331).

3. Steam cooking appliance according to claim 2, characterised in that the valve cartridge (232) is movably arranged in the channel (2311);

the booster valve assembly further comprises a return spring (234), wherein the return spring (234) is arranged in the passage (2311) and connected between the valve core (232) and the spray head (233) so that the valve core (232) can block the passage (2311).

4. Steam cooking appliance according to claim 3, wherein the channel (2311) comprises a first section and a second section communicating with each other, the cross-sectional area of the first section adjacent to the second section being smaller than the cross-sectional area of the second section adjacent to the first section, such that the connection of the first section and the second section forms a step;

the valve core (232) is movably arranged in the second section, and the return spring (234) can drive the valve core (232) to abut against the step.

5. Steam cooking appliance according to claim 4, characterised in that the step is chamfered at the location of a first annular slope (2312), the valve spool (232) having a second annular slope (2322), the return spring (234) being able to urge the second annular slope (2322) against the first annular slope (2312).

6. The steam cooking appliance according to claim 5, wherein the valve core (232) comprises a blocking portion (2321) and a mounting portion (2323) which are integrally provided;

one end of the return spring (234) is sleeved on the mounting part (2323) and abuts against the end face, close to the mounting part (2323), of the blocking part (2321);

the second annular inclined surface (2322) is provided to the blocking portion (2321).

7. Steam cooking appliance according to claim 2, characterised in that the valve seat (231) is screwed to the spray head (233).

8. The steam cooking appliance of any one of claims 1 to 7, wherein the booster valve assembly (230) is disposed at the top of the cooking cavity (120) and the steam injection holes (2331) are located above the cooking area.

9. Steam cooking appliance according to claim 8, characterised in that the booster valve assembly (230) comprises a first steam jet hole which is able to jet steam directly downwards;

and/or the booster valve assembly (230) includes a second steam injection hole capable of injecting steam obliquely downward.

10. Steam cooking appliance according to claim 9, characterised in that the pressure boost valve assembly (230) comprises a plurality of said second steam injection holes arranged circumferentially along a vertical axis, and in that the angle between the axis of said second steam injection holes and the vertical axis is in the range of 15 ° -60 °.

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