Gas outlet nozzle, piping structure and steam heating appliance

Abstract

The application discloses an air outlet nozzle, a pipeline structure and a steam heating electric appliance. The pipeline structure is used for connecting a steam generator and a cooking container of the steam heating electric appliance. The air outlet nozzle is provided with an air inlet channel and an air outlet channel. The air outlet channel is communicated with the air inlet channel. A central axis of the air inlet channel is defined as an air inlet central line. A central axis of the air outlet channel is defined as an air outlet central line. A spacing distance is formed between the air inlet central line and the air outlet central line. The technical scheme can reduce the overall noise of the steam heating electric appliance.

Description

Technical Field

[0001] This invention relates to the field of cooking apparatus technology, and in particular to a steam nozzle, piping structure, and steam heating appliance. Background Technology

[0002] Steam heating offers advantages such as less risk of food burning and high cooking efficiency. Its principle involves using a steam generator to heat liquids and produce high-temperature steam. This high-temperature steam is then piped into a cooking container holding the food, where it is cooked using the high temperature of the steam.

[0003] When high-temperature steam is discharged into a cooking container through a pipe, such as when the food being cooked contains cold water or a cold liquid, the high-temperature steam will produce large bubbles when it enters the cold liquid through the pipe. The high-temperature gas inside the bubble exchanges heat with the surrounding cold liquid, causing the bubble to be continuously compressed until it implodes and generates noise. The noise generated by the bursting of the bubble impacts the shell, which in turn causes the shell to vibrate and radiate noise. Summary of the Invention

[0004] The main objective of this invention is to provide an exhaust nozzle designed to reduce the overall noise of steam heating appliances.

[0005] To achieve the above objectives, the present invention proposes an air outlet nozzle, wherein the air outlet nozzle is provided with an air inlet channel and an air outlet channel, the air outlet channel is connected to the air inlet channel, the central axis of the air inlet channel is defined as the air inlet center line, the central axis of the air outlet channel is defined as the air outlet center line, and a gap is formed between the air inlet center line and the air outlet center line.

[0006] In one embodiment of the present invention, the interval distance formed between the intake centerline and the outlet centerline is defined as d, and the distance between the intake centerline and the periphery of the intake channel is defined as R, satisfying: 4R / 6≤d≤5R / 6; or 2R / 6≤d<4R / 6; or R / 6≤d<2R / 6;

[0007] And / or, define the interval distance formed between the intake centerline and the exhaust centerline as d, satisfying: 1mm≤d≤5mm.

[0008] In one embodiment of the present invention, the air intake channel extends along a first direction, and the air outlet channel extends along a second direction, wherein the first direction and the second direction are arranged at an angle.

[0009] And / or, the number of the air outlet channels is multiple, and the multiple air outlet channels are arranged at intervals around the air intake center line of the air intake channel, and at least one of the air outlet channels has an air outlet center line that is spaced apart from the air intake center line.

[0010] In one embodiment of the present invention, the outer diameter of the air outlet nozzle is in the range of: 40mm≤D≤60mm, or 30mm≤D≤40mm, or 10mm≤D≤30mm.

[0011] In one embodiment of the present invention, the air outlet channel includes a channel inlet and a channel outlet, the channel inlet is connected to the air inlet channel, and the area of ​​the channel inlet is smaller than the area of ​​the channel outlet.

[0012] In one embodiment of the present invention, the range of the ratio s of the area of ​​the channel exit to the area of ​​the channel entrance satisfies: 3≤s<4, or 2≤s<3, or 1<s<2.

[0013] In one embodiment of the present invention, the shape of the channel entrance is circular, square, or elliptical;

[0014] And / or, the shape of the channel outlet is circular, square, or elliptical;

[0015] And / or, the shape of the channel inlet is the same as the shape of the channel outlet.

[0016] In one embodiment of the present invention, the cross-sectional area of ​​the air outlet channel perpendicular to the air outlet centerline gradually increases from the channel inlet to the channel outlet;

[0017] And / or, the outlet of the air outlet channel is further provided with a flared structure.

[0018] In one embodiment of the present invention, the air outlet nozzle has a threaded section formed on the inner wall surface of the air inlet channel;

[0019] And / or, the shape of the cross-section of the air intake passage perpendicular to the air intake centerline is circular, square, or elliptical.

[0020] In one embodiment of the present invention, the air nozzle includes:

[0021] The nozzle base has a first channel and a first air passage communicating with the first channel; and

[0022] The nozzle cover has a second channel and a second air passage groove that connects to the second channel. The nozzle cover is closed onto the nozzle base. The first channel and the second channel connect to form the air inlet channel. The first air passage groove and the second air passage groove cooperate to form the air outlet channel.

[0023] In one embodiment of the present invention, the nozzle cover is detachably fitted onto the nozzle base.

[0024] In one embodiment of the present invention, the nozzle base is provided with a first buckle, and the nozzle cover is provided with a second buckle. The first buckle and the second buckle are engaged to detachably connect the nozzle base and the nozzle cover.

[0025] Alternatively, the nozzle base is provided with a first connecting plate, the first connecting plate is provided with a first clearance hole, the nozzle top cover is provided with a second connecting plate, the second connecting plate is provided with a second clearance hole, the first connecting plate abuts against the second connecting plate, and a fastener passes through the first clearance hole and connects to the second clearance hole, thereby detachably connecting the nozzle base and the nozzle top cover.

[0026] In one embodiment of the present invention, the nozzle cover and the nozzle base are fixedly connected as an integral structure.

[0027] In one embodiment of the present invention, the air nozzle includes:

[0028] The main body is provided with the air intake channel;

[0029] An air outlet, connected to the main body, and having an air outlet groove communicating with the air inlet channel, the air outlet groove having an opening; and

[0030] A sealing ring is fitted onto the main body and blocks the opening of the air outlet groove. The sealing ring and the air outlet groove together form the air outlet channel.

[0031] In one embodiment of the present invention, the interval distance between the air intake centerline and the air outlet centerline is defined as d, and the distance between the air intake centerline and the periphery of the air intake channel is defined as R, satisfying: 4R / 6≤d≤5R / 6;

[0032] The air intake channel extends vertically, and the air outlet channel extends horizontally.

[0033] The number of air outlet channels is multiple, and the multiple air outlet channels are arranged at intervals around the air intake center line of the air intake channel, and at least one of the air outlet channels has an interval distance between its air outlet center line and the air intake center line.

[0034] The outer diameter of the air outlet nozzle is within the range of: 40mm≤D≤60mm;

[0035] The air outlet channel includes an inlet and an outlet, the inlet being connected to the inlet channel, and the area of ​​the inlet being smaller than the area of ​​the outlet.

[0036] The range of the ratio s of the area of ​​the channel exit to the area of ​​the channel entrance satisfies: 3 ≤ s < 4;

[0037] The entrance to the channel is circular in shape, and the exit of the channel is circular in shape;

[0038] The cross-sectional area of ​​the air outlet channel, which is perpendicular to the air outlet centerline, gradually increases from the channel inlet to the channel outlet.

[0039] The outlet of the air outlet channel is also provided with a flared structure;

[0040] The air outlet nozzle has a threaded section formed on the inner wall surface of the air inlet channel;

[0041] The cross-section of the air intake channel perpendicular to the air intake centerline is circular.

[0042] The air outlet nozzle includes:

[0043] The nozzle base has a first channel and a first air passage communicating with the first channel; and

[0044] The nozzle cover has a second channel and a second air passage groove that communicates with the second channel. The nozzle cover is detachably fitted onto the nozzle base. The first channel and the second channel communicate to form the air inlet channel. The first air passage groove and the second air passage groove cooperate to form the air outlet channel.

[0045] The nozzle base is provided with a first buckle, and the nozzle cover is provided with a second buckle. The first buckle and the second buckle are engaged to detachably connect the nozzle base and the nozzle cover.

[0046] The present invention also provides a pipeline structure, the pipeline structure including a connecting pipe and a steam nozzle as described above, the steam nozzle being connected to one end of the connecting pipe and located inside the cooking container, and the end of the connecting pipe opposite to the steam nozzle being used to connect to a steam generator.

[0047] In one embodiment of the present invention, the pipeline structure further includes an expansion structure, the expansion structure being connected to the connecting pipe, and a steam expansion chamber being formed within the expansion structure, connecting the steam generator and the cooking container.

[0048] The present invention also proposes a steam heating appliance, including a steam generator, a cooking container, and a piping structure, wherein the piping structure is used to connect the steam generator and the cooking container of the steam heating appliance.

[0049] The exhaust nozzle in this invention, by setting a gap between the air inlet centerline and the air outlet centerline, allows high-temperature steam to first flow through the air inlet channel after exiting the steam generator. Most of the high-temperature steam flows along the air inlet centerline, and then flows into the air outlet channel at the junction of the air inlet and outlet channels before finally entering the cooking container. Because of the gap between the air inlet and outlet centerlines, the high-temperature steam does not directly rush into the air outlet channel from the air inlet channel. This gap creates a deceleration and noise reduction effect at the junction of the air inlet and outlet channels, thereby reducing the kinetic energy of the high-temperature gas and thus reducing jet noise. This allows the high-temperature steam to be slowly injected into the cooking container, resulting in more even heat exchange between the high-temperature steam and the food in the cooking container, further reducing the noise generated by bubble bursting. Attached Figure Description

[0050] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art 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 the structures shown in these drawings without creative effort.

[0051] Figure 1 This is a schematic diagram of the structure of an embodiment of the steam heating appliance of the present invention;

[0052] Figure 2 for Figure 1 A cross-sectional schematic diagram of an embodiment of a steam heating appliance shown;

[0053] Figure 3 for Figure 1 A schematic diagram of the structure of an embodiment of the steam outlet nozzle of the steam heating appliance shown;

[0054] Figure 4 for Figure 3 Cross-sectional view of an embodiment of a centrally located air outlet nozzle;

[0055] Figure 5 This is a schematic diagram of a structure of an embodiment of the gradient channel of the air outlet nozzle of the present invention.

[0056] Figure 6 This is a schematic diagram of an embodiment of the air outlet nozzle of the present invention, which has a flared structure.

[0057] Figure 7 This is a schematic diagram of an embodiment of the air outlet nozzle of the present invention, which includes a nozzle base and a nozzle cover.

[0058] Figure 8 for Figure 7 Exploded view of an embodiment of the centrally located air outlet nozzle;

[0059] Figure 9 for Figure 8 A schematic diagram of the structure of an embodiment of the nozzle base in a center-exhaust nozzle;

[0060] Figure 10 This is a schematic diagram of another embodiment of the air outlet nozzle of the present invention, which includes a nozzle base and a nozzle cover.

[0061] Figure 11 for Figure 10 Exploded view of an embodiment of the centrally located air outlet nozzle;

[0062] Figure 12 This is a schematic diagram of an embodiment of the air outlet nozzle of the present invention, including a main body, an air outlet, and a sealing ring;

[0063] Figure 13 for Figure 12 A schematic diagram of the structure of the main body and the air outlet of an embodiment of the central air outlet nozzle;

[0064] Figure 14 For the air nozzle of the present invention, under the same conditions, the red, green, blue and pink lines are the sound power lines that change over time with outer diameters of 24mm, 30mm, 36mm and 40mm respectively.

[0065] Figure 15 For the exhaust nozzle of the present invention, under the same conditions, the red, green, blue, and pink lines are the sound power lines that change over time with the ratio of the channel outlet to the channel inlet being 1, 2, 3, and 4, respectively.

[0066] Figure 16 The sound power lines of the exhaust nozzle of the present invention, configured as a fan-shaped hole (green line), and the elongated hole (blue line) of the prior art, changing over time under the same conditions;

[0067] Figure 17 For the air nozzle of the present invention, under the same conditions, the red, green, blue, pink and sky blue lines are sound power lines that change over time with an interval d of 1mm, 2mm, 3mm, 4mm and 5mm respectively.

[0068] Explanation of icon numbers:

[0069]

[0070]

[0071] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0072] 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 a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0073] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0074] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0075] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0076] Combined with reference Figure 1 and Figure 2 This invention proposes a steam nozzle 100, which, after being installed in a piping structure, connects the steam generator 210 of a steam heating appliance 200 and the cooking container 230. The steam heating appliance 200 can be a steam stew pot, a steam rice cooker, or a steam oven.

[0077] Combined with reference Figures 3 to 4An embodiment of the present application provides an air outlet nozzle 100, which has an air inlet channel 10 and an air outlet channel 30. The air outlet channel 30 is connected to the air inlet channel 10. The central axis of the air inlet channel 10 is defined as the air inlet center line 10a, and the central axis of the air outlet channel 30 is defined as the air outlet center line 30a. There is a gap between the air inlet center line 10a and the air outlet center line 30a.

[0078] By setting a gap between the air inlet centerline 10a and the air outlet centerline 30a, when high-temperature steam flows out from the steam generator 210, it first needs to flow through the air inlet channel 10. Most of the high-temperature steam flows along the air inlet centerline 10a, and then flows into the air outlet channel 30 at the connection between the air inlet channel 10 and the air outlet channel 30 before flowing into the cooking container 230. When the high-temperature steam flows from the air inlet channel 10 into the air outlet channel 30, the gap between the air inlet centerline 10a and the air outlet centerline 30a prevents the high-temperature steam from directly rushing into the air outlet channel 30. This gap creates a deceleration and noise reduction effect at the connection between the air inlet channel 10 and the air outlet channel 30, thereby reducing the kinetic energy of the high-temperature gas and thus reducing jet noise. This allows high-temperature steam to be slowly injected into the cooking container 230, so that the high-temperature steam can exchange heat with the food in the cooking container 230 more evenly, thereby reducing the noise generated by the bursting of bubbles.

[0079] It is understandable that the intake centerline 10a and the outlet centerline 30a are both the central axes of the intake channel 10 and the outlet channel 30, respectively, and these central axes are also the main paths through which most of the gas flows. Of course, the intake channel 10 and the outlet channel 30 can be of regular shape, in which case their central axes are their geometric centerlines. The intake channel 10 and the outlet channel 30 can also be of irregular shape, in which case their central axes refer to the main central axis of the airflow within those channels.

[0080] Further combined with reference Figure 4 and Figure 5 Furthermore, the interval between the intake centerline 10a and the outlet centerline 30a is defined as d, and the distance between the intake centerline 10a and the periphery of the intake channel 10 is defined as R, satisfying: 4R / 6≤d≤5R / 6; or 2R / 6≤d<4R / 6; or R / 6≤d<2R / 6.

[0081] When the intake channel 10 is a regular circular channel, R is the radius of the intake channel 10. When the intake channel 10 is an irregular shape, the distance R between its intake centerline 10a and its edge can be understood as the distance from the center point to any edge. Therefore, it can be understood that any distance value R can satisfy the above relationship.

[0082] Setting the interval distance d within the range of 4R / 6 ≤ d ≤ 5R / 6, or 2R / 6 ≤ d < 4R / 6, or R / 6 ≤ d < 2R / 6, can effectively reduce noise. Among the above settings, when d is between 4R / 6 and 5R / 6, the noise level is lowest compared to the other two implementation schemes. When d is between R / 6 ≤ d < 2R / 6, the eccentricity between the intake channel 10 and the exhaust channel 30 is smaller, and it is also easier to manufacture.

[0083] Furthermore, in conjunction with reference Figure 17 The interval distance is d, which satisfies: d≥1mm.

[0084] Experimental data comparison table

[0085] Nozzle diameter / mm Average sound power / dB Maximum sound power / dB d＝1 67.43 79.68 d＝2 65.95 77.42 d＝3 65.27 77.15 d＝4 62.38 71.71 d＝5 61.43 74.61

[0086] Refer to the data in the table above and the appendix. Figure 17 , attached Figure 17 In the test, all other things being equal, the red, green, blue, pink, and sky-blue lines represent the sound power over time, with intervals d of 1mm, 2mm, 3mm, 4mm, and 5mm, respectively. The test results show that the larger the interval d, the smaller the average sound power. Within the range 1 ≤ s ≤ 4, the maximum sound power also gradually decreases.

[0087] Combined with reference Figures 3 to 5 In one embodiment of this application, the air intake channel extends along a first direction, and the air outlet channel extends along a second direction, with the first direction and the second direction forming an angle. The first direction and the second direction refer to the extending directions of the air intake centerline 10a and the air outlet centerline 30a. By setting them at an angle, the noise reduction effect can be further enhanced.

[0088] In one embodiment, the air intake passage 10 extends vertically and the air outlet passage 30 extends horizontally.

[0089] The vertically extending air intake channel 10 and the horizontally extending air outlet channel 30 are relatively easy to manufacture, and also facilitate the ejection of high-temperature steam. At the same time, they can increase the jet path of high-temperature steam and further reduce noise.

[0090] Furthermore, there are multiple air outlet channels 30, and the multiple air outlet channels 30 are arranged at intervals around the air intake center line 10a of the air intake channel 10, and at least one air outlet channel 30 has an air outlet center line 30a that is spaced apart from the air intake center line 10a.

[0091] Multiple air outlet channels 30 can form multiple air outlet paths, facilitating the discharge of high-temperature gases. This also prevents the entire air outlet nozzle 100 from becoming unusable due to a blockage in a single air outlet channel 30. Multiple air outlet channels 30 arranged around the air inlet center line 10a create a uniform air outlet distribution, resulting in even airflow and reduced noise. Simply maintaining a gap between the air outlet center line 30a of at least one air outlet channel 30 and the air inlet center line 10a is sufficient to initially reduce noise. Furthermore, maintaining a gap between the air outlet center lines 30a of all air outlet channels 30 and the air inlet center line 10a can further enhance the noise reduction effect.

[0092] Combined with reference Figure 4 and Figure 14 In one embodiment of this application, the outer diameter range of the air outlet nozzle 100 is: 40mm≤D≤60mm, or 30mm≤D≤40mm, or 10mm≤D≤30mm.

[0093] Experimental data comparison table

[0094] Nozzle diameter / mm Average sound power / dB Maximum sound power / dB D＝24 62.29 71.71 D＝30 61.57 71.30 D＝36 58.66 66.26 D＝40 60.83 65.40

[0095] Refer to the data in the table above and the appendix. Figure 14 , attached Figure 14 In the test, under the same conditions, the red, green, blue, and pink lines represent the sound power lines changing over time for D=24mm, D=30mm, D=36mm, and D=40mm, respectively. The test results show that the larger the nozzle diameter, the lower the maximum noise. Therefore, when using maximum noise as the evaluation criterion, the nozzle outer diameter should ideally be 40mm≤D≤60mm, followed by 30mm<D<40mm, and then 10mm<D≤30mm. When using average sound power as the evaluation criterion, the nozzle outer diameter should ideally be 30mm<D≤40mm, followed by 40mm<D≤60mm, and then 10mm<D≤30mm.

[0096] Further combined with reference Figure 3 and Figure 4 When setting the air outlet channel 30, the air outlet channel 30 can be configured as follows: the air outlet channel 30 includes a channel inlet 31 and a channel outlet 33, the channel inlet 31 is connected to the air inlet channel 10, and the area of ​​the channel inlet 31 is smaller than the area of ​​the channel outlet 33.

[0097] By setting the area of ​​the channel inlet 31 to be smaller than the area of ​​the channel outlet 33, the high-temperature and high-pressure steam enters the air intake channel 10 through the channel outlet 33, forming a steam expansion chamber. This allows the high-temperature steam to slow down in the steam expansion chamber, and thus allows the high-temperature steam to be slowly injected into the cooking container 230.

[0098] Furthermore, the channel exit 33 and channel entrance 31 can be set such that the ratio s of the area of ​​the channel exit 33 to the area of ​​the channel entrance 31 satisfies the following range: 3≤s<4, or 2≤s<3, or 1<s<2.

[0099] Experimental data comparison table

[0100] ratio Average sound power / dB Maximum sound power / dB 1 82.38 87.76 2 64.03 77.03 3 63.46 73.45 4 64.80 74.85

[0101] Refer to the data in the table above and the appendix. Figure 15 , attached Figure 15 In the test, all other things being equal, the red, green, blue, and pink lines represent sound power lines changing over time with ratios of 1, 2, 3, and 4, respectively. The test results show that the larger the nozzle diameter, the lower the maximum noise level.

[0102] The ratio of the area of ​​the passage exit 33 to the area of ​​the passage entrance 31 is s. According to the test data, the effect is best when 3≤s<4, followed by 2≤s<3, then 4≤S, and finally S≤1.

[0103] When setting the shapes of the channel inlet 31 and channel outlet 33, the following settings can be adopted: the shape of the channel inlet 31 can be circular, square, or elliptical. Setting the channel inlet 31 to a regular shape such as circular, square, or elliptical facilitates its processing. Of course, the channel outlet 33 can also be set to circular, square, or elliptical. Furthermore, the shape of the channel inlet 31 can be set to be the same as the shape of the channel outlet 33, thereby further facilitating processing.

[0104] As mentioned in the above embodiment, the area of ​​the channel inlet 31 can be set to be smaller than the area of ​​the channel outlet 33 to reduce noise. This setting can be a sudden change, such as setting a stepped opening, where the channel inlet 31 is also smaller than the channel outlet 33. Of course, it can also be set as a gradual change, in conjunction with reference to... Figure 5 For example, the cross-sectional area of ​​the outlet channel 30, perpendicular to the outlet centerline 30a, can be gradually increased from the channel inlet 31 to the channel outlet 33. This arrangement of the outlet channel 30 allows the steam velocity to gradually decrease, thereby reducing the noise it generates. The gradually increasing outlet channel 30 can be arranged in a fan shape, or the outlet area can be increased.

[0105] Combined with reference to the appendix Figure 16 The blue line represents the elongated orifice in the existing technology, and the green line represents the fan-shaped orifice. The test results show that when the nozzle outlet is changed to a fan shape, the average sound power decreases from 77.27dB to 66.24dB, and the maximum noise decreases from 83.03dB to 76.24dB, demonstrating a very significant noise reduction effect.

[0106] Combined with reference to the appendix Figure 6 In another embodiment, the outlet 33 of the air outlet channel 30 is further provided with a flared structure 35. This flared structure allows the area of ​​the outlet 33 to be larger than that of the inlet 31. Furthermore, the flared structure 35 at the outlet 33 can form an expansion cavity. This flared structure 35 is similar to adding a chamfer to the outside of the air outlet nozzle 100, used to reduce the velocity of steam leaving the nozzle 100, while simultaneously increasing the contact area between the steam and the cold liquid, thereby reducing noise. The aforementioned flared structure 35 can be combined with a gradient channel or used independently, both within the scope of this application.

[0107] Furthermore, the cross-sectional shape of the intake passage 10 perpendicular to the intake centerline 10a is circular, square, or elliptical. Setting it to the above-mentioned circular, square, or elliptical shape facilitates the machining of the intake passage 10.

[0108] Of course, a threaded section 11 can also be provided in the air intake channel 10 to facilitate screwing. For example, the air outlet nozzle 100 has a threaded section 11 formed on the inner wall surface of the air intake channel 10. Through this threaded section 11, the connection with the cooking container 230 is more convenient and quick. The installation of the air outlet nozzle 100 can be completed by simply rotating the air outlet nozzle 100 and connecting it with the threaded section 11 of the pipe of the cooking container 230.

[0109] When setting the air outlet nozzle 100, refer to... Figures 7 to 11 In one embodiment, the air outlet nozzle 100 may be configured as follows: the nozzle base 51 and the nozzle cover 53 are provided. The nozzle base 51 is provided with a first channel 511 and a first air passage 513 communicating with the first channel 511. The nozzle cover 53 is provided with a second channel 531 and a second air passage 533 communicating with the second channel 531. The nozzle cover 53 covers the nozzle base 51. The first channel 511 and the second channel 531 communicate to form the air inlet channel 10. The first air passage 513 and the second air passage 533 cooperate to form the air outlet channel 30.

[0110] By setting the nozzle cover 53 and the nozzle base 51, the air inlet channel 10 and the air outlet channel 30 are enclosed, which makes it easier to clean and maintain the air inlet channel 10 and the air outlet channel 30, and prevents food residue from clogging the air inlet channel 10 and the air outlet channel 30. The separately set nozzle cover and nozzle base facilitate the processing of their components.

[0111] Furthermore, the nozzle cover 53 can be detachably attached to the nozzle base 51.

[0112] During cleaning, the nozzle cover 53 and nozzle base 51 are separated, so that the first channel 511, the second channel 531, the first air passage 513 and the second air passage 533 can be cleaned separately, which makes the cleaning process more convenient.

[0113] When the nozzle cover 53 and the nozzle base 51 are configured to be detachably connected, the following technical solution can be adopted:

[0114] Combined with reference Figures 7 to 9 The nozzle base 51 is provided with a first buckle 515, and the nozzle cover 53 is provided with a second buckle 535. The first buckle 515 and the second buckle 535 are engaged to detachably connect the nozzle base 51 and the nozzle cover 53.

[0115] By providing a first latch 515 and a second latch 535 to the nozzle cover 53 and nozzle base 51 respectively, the nozzle cover 53 and nozzle base 51 can be easily and detachably connected via latching. It is understood that the first latch 515 and the second latch 535 can have various shapes, such as hooks and plates, or interlocking latches, etc. Multiple first latches 515 and second latches 535 can be provided, arranged circumferentially at intervals. Of course, a single latch can also be used, which is also within the scope of this application.

[0116] Alternatively, in conjunction with reference Figures 10 to 11 Another possible technical solution is as follows: the nozzle base 51 is provided with a first connecting plate 517, the first connecting plate 517 is provided with a first clearance hole, the nozzle cover 53 is provided with a second connecting plate 537, the second connecting plate 537 is provided with a second clearance hole, the first connecting plate 517 and the second connecting plate 537 abut against each other, and a fastener 55 passes through the first clearance hole and connects to the second clearance hole, thereby detachably connecting the nozzle base 51 and the nozzle cover 53.

[0117] During installation, the first connecting plate 517 and the second connecting plate 537 are aligned and abutted together, thereby aligning the first clearance hole and the second clearance hole, and then connected by fasteners 55. The fasteners 55 can be bolts or screws, and this connection method using fasteners 55 makes the connection between the nozzle cover 53 and the nozzle base 51 more secure. Of course, similar to a snap-fit ​​connection, the number of first connecting plates 517 and second connecting plates 537 can be multiple, with correspondingly multiple fasteners 55. Multiple first connecting plates 517 and second connecting plates 537 are arranged circumferentially at intervals. Alternatively, a single circumferentially extending first connecting plate 517 and second connecting plate 537 can be used, abutting against each other, which is also within the scope of this application.

[0118] Of course, in another embodiment, after the nozzle cover 53 and the nozzle base 51 are processed separately, the nozzle cover 53 and the nozzle base 51 can be fixedly connected to each other as an integral structure, which is also within the scope of protection of this application.

[0119] Combined with reference Figure 12 and Figure 13 In another embodiment of the air outlet nozzle 100, the air outlet nozzle 100 includes a main body 71, an air outlet 73, and a sealing ring 75. The main body 71 is provided with the air inlet channel 10. The air outlet 73 is connected to the main body 71 and is provided with an air outlet groove 731 communicating with the air inlet channel 10, and the air outlet groove 731 has an opening. The sealing ring 75 is sleeved on the main body 71 and blocks the opening of the air outlet groove 731. The sealing ring 75 and the air outlet groove 731 together form the air outlet channel 30.

[0120] During installation, the sealing ring 75 can be fitted onto the outer circumferential surface of the connecting pipe 290 inside the cooking container 230. Then, when the air inlet channel 10 of the main body 71 is threaded, it can be directly threaded to the outer circumferential surface of the connecting pipe 290. When the thread rotates, the air outlet 73 abuts against the sealing ring 75, thereby forming an air outlet channel 30 by the groove and the sealing ring 75 surrounding it. With the above arrangement, the sealing ring 75 and the air outlet 73 only have a sealing contact relationship, and there is no direct detachable connection relationship, which simplifies the overall structure of the air outlet nozzle 100 and reduces the processing cost of the air outlet nozzle 100.

[0121] It is understood that the above-described embodiment is a separate air nozzle 100, but it can also be an integrated air nozzle 100, which is also within the scope of protection of this application.

[0122] The present invention also proposes a pipeline structure including a connecting pipe 290 and a steam nozzle 100. The steam nozzle 100 is connected to one end of the connecting pipe 290 and is located inside the cooking container 230. The end of the connecting pipe 290 opposite to the steam nozzle 100 is used to connect to a steam generator 210. The specific structure of the steam nozzle 100 is as described in the above embodiments. Since this pipeline structure adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0123] The steam generator 210 can be a device that uses a resistance heating element to generate steam. The cooking container 230 can be a separate unit or it can be formed by the base 270 of the steam heating appliance 200. When the cooking container 230 is formed by the base 270, a lid can also be provided for covering it. At the same time, a water tank 250 can be provided to supply water to the steam generator 210.

[0124] Furthermore, the pipeline structure also includes an expansion structure, which is connected to the connecting pipe 290, and a steam expansion chamber is formed within the expansion structure that connects the steam generator 210 and the cooking container 230.

[0125] The connecting pipe 290 primarily serves to guide the airflow, connecting the steam generator 210 and the cooking container 230, allowing the high-temperature steam from the steam generator 210 to enter the cooking container 230 through the connecting pipe 290. The expansion structure is connected to the connecting pipe 290, either directly or indirectly through other components. A steam expansion chamber is formed within the expansion structure, connecting the steam generator 210 and the cooking container 230. This steam expansion chamber is connected to the connecting pipe 290 and can be located in the middle or at the end of the connecting pipe. The steam expansion chamber can be a partially enlarged chamber within the pipe.

[0126] The pipeline structure in this invention, through the connection pipe 290 and the expansion structure connected to the connection pipe 290, allows high-temperature steam, after flowing out of the steam generator 210, to pass through the connection pipe 290 and the expansion structure, and then sequentially through the air inlet channel 10 and the air outlet channel 30 of the air outlet nozzle 100 before flowing into the cooking container 230. When the high-temperature steam flows into the expansion structure, the steam expansion chamber formed within the expansion structure expands the volume of the pipeline, causing changes in the pipeline's space. This allows for the regulation of the pressure within the pipeline, stabilizing the airflow and preventing jet noise caused by sudden changes in airflow. Simultaneously, the high-temperature steam can be decelerated within the steam expansion chamber, allowing it to be slowly injected into the cooking container 230. Therefore, the high-temperature steam can exchange heat more evenly with the food in the cooking container 230, thus reducing noise generated by bubble bursting.

[0127] This invention also proposes a steam heating appliance 200, which includes a steam generator 210, a cooking container 230, and a piping structure. The specific structure of the piping structure is as described in the above embodiments. Since this steam heating appliance 200 adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated upon here. This steam heating appliance 200 can be a steam pot, a steam oven, or a steam fryer, etc.

[0128] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A steam heating appliance, characterized in that, The device includes a steam generator, a cooking container, and a piping structure. The piping structure includes a connecting pipe and a steam nozzle. The steam nozzle is connected to one end of the connecting pipe and is located inside the cooking container. The end of the connecting pipe opposite to the steam nozzle is used to connect to the steam generator. The air nozzle is provided with an air inlet channel and an air outlet channel. The air outlet channel is connected to the air inlet channel. The central axis of the air inlet channel is defined as the air inlet center line, and the central axis of the air outlet channel is defined as the air outlet center line. There is a gap between the air inlet center line and the air outlet center line. The air intake channel extends along a first direction, and the air outlet channel extends along a second direction, with the first direction and the second direction forming an angle. The number of air outlet channels is multiple, and the multiple air outlet channels are arranged at intervals around the air intake center line of the air intake channel, and at least one of the air outlet channels has an air outlet center line that is spaced apart from the air intake center line.

2. The steam heating appliance as described in claim 1, characterized in that, The distance between the intake centerline and the outlet centerline is defined as d, and the distance between the intake centerline and the periphery of the intake channel is defined as R, satisfying: 4R / 6≤d≤5R / 6; or 2R / 6≤d<4R / 6; or R / 6≤d<2R / 6; And / or, define the interval distance formed between the intake centerline and the exhaust centerline as d, satisfying: d≥1mm.

3. The steam heating appliance as described in claim 1, characterized in that, The outer diameter of the air outlet nozzle is in the range of: 40mm≤D≤60mm, or 30mm≤D≤40mm, or 10mm≤D≤30mm.

4. The steam heating appliance as described in claim 1, characterized in that, The air outlet channel includes an inlet and an outlet. The inlet is connected to the inlet channel, and the area of ​​the inlet is smaller than the area of ​​the outlet.

5. The steam heating appliance as described in claim 4, characterized in that, The range of the ratio s of the area of ​​the channel exit to the area of ​​the channel entrance satisfies: 3≤s<4, or 2≤s<3, or 1<s<2.

6. The steam heating appliance as described in claim 4, characterized in that, The entrance to the passage is circular, square, or elliptical in shape; And / or, the shape of the channel outlet is circular, square, or elliptical; And / or, the shape of the channel inlet is the same as the shape of the channel outlet.

7. The steam heating appliance as described in claim 4, characterized in that, The cross-sectional area of ​​the air outlet channel, which is perpendicular to the air outlet centerline, gradually increases from the channel inlet to the channel outlet. And / or, the outlet of the air outlet channel is further provided with a flared structure.

8. The steam heating appliance as described in claim 1, characterized in that, The air outlet nozzle has a threaded section formed on the inner wall surface of the air inlet channel; And / or, the shape of the cross-section of the air intake passage perpendicular to the air intake centerline is circular, square, or elliptical.

9. The steam heating appliance as described in any one of claims 1 to 8, characterized in that, The air outlet nozzle includes: The nozzle base has a first channel and a first air passage communicating with the first channel; and The nozzle cover has a second channel and a second air passage groove that connects to the second channel. The nozzle cover is closed onto the nozzle base. The first channel and the second channel connect to form the air inlet channel. The first air passage groove and the second air passage groove cooperate to form the air outlet channel.

10. The steam heating appliance as described in claim 9, characterized in that, The nozzle cover is detachable and fits onto the nozzle base.

11. The steam heating appliance as described in claim 10, characterized in that, The nozzle base is provided with a first buckle, and the nozzle cover is provided with a second buckle. The first buckle and the second buckle are engaged to detachably connect the nozzle base and the nozzle cover. Alternatively, the nozzle base is provided with a first connecting plate, the first connecting plate is provided with a first clearance hole, the nozzle top cover is provided with a second connecting plate, the second connecting plate is provided with a second clearance hole, the first connecting plate abuts against the second connecting plate, and a fastener passes through the first clearance hole and connects to the second clearance hole, thereby detachably connecting the nozzle base and the nozzle top cover.

12. The steam heating appliance as described in claim 9, characterized in that, The nozzle cover and the nozzle base are fixedly connected as an integral structure.

13. The steam heating appliance as described in any one of claims 1 to 8, characterized in that, The air outlet nozzle includes: The main body is provided with the air intake channel; An air outlet, connected to the main body, and having an air outlet groove communicating with the air inlet channel, the air outlet groove having an opening; and A sealing ring is fitted onto the main body and blocks the opening of the air outlet groove. The sealing ring and the air outlet groove together form the air outlet channel.

14. The steam heating appliance as described in claim 1, characterized in that, The distance between the intake centerline and the outlet centerline is defined as d, and the distance between the intake centerline and the periphery of the intake channel is defined as R, satisfying: 4R / 6≤d≤5R / 6; The air intake channel extends vertically, and the air outlet channel extends horizontally. The number of air outlet channels is multiple, and the multiple air outlet channels are arranged at intervals around the air intake center line of the air intake channel, and at least one of the air outlet channels has an interval distance between its air outlet center line and the air intake center line. The range of the outer diameter of the air outlet nozzle is: 40mm≤D≤60mm; The air outlet channel includes an inlet and an outlet. The inlet is connected to the inlet channel, and the area of ​​the inlet is smaller than the area of ​​the outlet. The range of the ratio s of the area of ​​the channel exit to the area of ​​the channel entrance satisfies: 3 ≤ s < 4; The entrance to the channel is circular in shape, and the exit of the channel is circular in shape; The cross-sectional area of ​​the air outlet channel, which is perpendicular to the air outlet centerline, gradually increases from the channel inlet to the channel outlet. The outlet of the air outlet channel is also provided with a flared structure; The air outlet nozzle has a threaded section formed on the inner wall surface of the air inlet channel; The cross-section of the air intake channel perpendicular to the air intake centerline is circular. The air outlet nozzle includes: The nozzle base has a first channel and a first air passage communicating with the first channel; and The nozzle cover has a second channel and a second air passage groove that communicates with the second channel. The nozzle cover is detachably fitted onto the nozzle base. The first channel and the second channel communicate to form the air inlet channel. The first air passage groove and the second air passage groove cooperate to form the air outlet channel. The nozzle base is provided with a first buckle, and the nozzle cover is provided with a second buckle. The first buckle and the second buckle are engaged to detachably connect the nozzle base and the nozzle cover.

15. The steam heating appliance as described in claim 1, characterized in that, The pipeline structure also includes an expansion structure, which is connected to the connecting pipe, and a steam expansion chamber is formed within the expansion structure, connecting the steam generator and the cooking container.

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