Bubble breaking device for cooking equipment and cooking equipment

Abstract

A bubble breaking device for cooking equipment and the cooking equipment, comprising a main bubble breaking chamber and a steam introduction channel for cooking steam, wherein the steam introduction channel is connected to the main bubble breaking chamber and is used to introduce a high-temperature bubble flow into the main bubble breaking chamber; the device is characterized in that it also comprises a cold air introduction channel, which is connected to the main bubble breaking chamber and is used to provide an introduction channel for introducing cold air from the external space of the cooking equipment into the main bubble breaking chamber; and the device also comprises an airflow driving device, which is used to introduce cold air from the external space of the cooking equipment into the main bubble breaking chamber through the cold air introduction channel so that the cold air can accelerate the cooling and bubble breaking of the high-temperature bubble flow.

Description

Technical Field

[0001] The present invention relates to a bubble breaking device for cooking equipment used for breaking high-temperature bubbles formed in the cooking process, and also relates to a cooking equipment using the bubble breaking device. Background Art

[0002] In order to prevent the overflow of the pot during the cooking of liquid food, cooking equipment is often equipped with a bubble breaker. According to the principle of bubble breaking, the bubble breaker can be divided into an impeller squeeze type bubble breaker and an airflow blowing type bubble breaker. For example, the steam valve with a rotating bubble breaking member disclosed in the Chinese invention patent CN201710338513.7, a valve seat and a valve cover, a steam inlet is provided on the valve seat, a steam chamber connected to the steam inlet is formed between the valve cover and the valve seat, and a first rotating bubble breaking member and a second rotating bubble breaking member are rotatably installed in the steam chamber, and the first rotating bubble breaking member and the second rotating bubble breaking member are both impellers, and the first rotating bubble breaking member and the second rotating bubble breaking member can be driven by the steam ejected from the steam inlet to rotate and break bubbles. The bubble breaking device disclosed in the patent CN201710338513.7 belongs to an impeller squeeze type bubble breaker, which requires continuous rotation of the impeller to break bubbles. Due to structural limitations, the number of blades that can be set on the impeller is limited, and gaps are inevitably left between adjacent blades. In this way, when a large number of high-temperature bubbles flow into the steam chamber at the same time, some of them will slip through the net, and some of the high-temperature bubbles will escape from the gaps between adjacent blades. Therefore, the structure of the impeller determines that this impeller-type bubble breaker is difficult to achieve a very ideal bubble breaking effect.

[0003] Alternatively, the rice cooker disclosed in the Chinese invention patent CN201610097210.6 includes an inner pot and a surface cover assembly arranged on the upper part of the inner pot, and a turbofan and an anti-overflow valve assembly unit are arranged in the surface cover assembly. The air outlet of the turbofan is connected to the anti-overflow valve assembly unit to provide airflow for the anti-overflow valve assembly unit, and the gas-liquid mixed bubbles flowing from the inner pot into the anti-overflow valve assembly unit are blown up. The bubble breaking device disclosed in the patent CN201610097210.6 belongs to an airflow blowing and pressure type bubble breaker, which requires the turbofan to operate at high power to blow out an airflow with a certain impact force to blow up the gas-liquid mixed bubbles, so the energy consumption of the turbofan is very high. Moreover, in the face of gas-liquid mixed bubbles with relatively good viscosity, it is difficult to blow them up by the impact force of the airflow alone, which still results in an unsatisfactory bubble breaking effect. Summary of the invention

[0004] According to the above analysis, whether an impeller extrusion type bubble breaker or an airflow blowing type bubble breaker is used, the bubble breaking effect is still unsatisfactory, and the bubble breaking structure needs to be further improved. In view of this, the present invention proposes a bubble breaking device for cooking equipment, including a main bubble breaking chamber and a steam introduction channel for cooking steam, wherein the steam introduction channel is connected to the main bubble breaking chamber and is used to introduce a high-temperature bubble flow into the main bubble breaking chamber; it is characterized in that it also includes a cold air introduction channel, wherein the cold air introduction channel is connected to the main bubble breaking chamber and is used to provide an introduction channel for introducing cold air from the external space of the cooking equipment into the main bubble breaking chamber; it also includes an airflow driving device, wherein the airflow driving device is used to introduce cold air from the external space of the cooking equipment into the main bubble breaking chamber through the cold air introduction channel so that the cold air can accelerate the high-temperature bubble flow to cool and break the bubbles.

[0005] Among them, the steam inlet channel is used to introduce high-temperature bubble flow into the main bubble breaking cavity, and the cold air inlet channel is used to introduce cold air from the external space of the cooking equipment into the main bubble breaking cavity. The high-temperature bubble flow and the cold air meet and mix in the main bubble breaking cavity. The cold air can cool the high-temperature bubble flow to liquefy the water vapor in the high-temperature bubble flow to achieve bubble breaking.

[0006] Among them, the airflow driving device is a device that can drive air flow. It can be arranged inside the main bubble breaking cavity to suck the cold air in the external space of the cooking equipment into the main bubble breaking cavity; it can also be arranged outside the main bubble breaking cavity to blow the cold air in the external space of the cooking equipment into the main bubble breaking cavity.

[0007] According to the above technical scheme, compared with the prior art, the beneficial technical effect of the present invention is that: since the cold air introduction channel and the airflow driving device can be used to introduce the cold air in the external space of the cooking device into the main bubble breaking chamber to accelerate the cooling and bubble breaking of the high-temperature bubble flow, the bubble breaking device adopts a cooling bubble breaking scheme, and does not require direct contact between the bubble breaking structure and the high-temperature bubble flow. Bubble breaking can be achieved within the cooling range of the cold air. Compared with the existing impeller extrusion bubble breakers and airflow blowing bubble breakers, it is easier to achieve a wider range and higher efficiency of bubble breaking. Moreover, the high-temperature bubble flow entering the main bubble breaking chamber is cooled and liquefied into rice soup by the cooling air, which not only reduces the discharge of water vapor, but also reduces the overflow of rice soup in the cooking equipment, and improves the anti-overflow performance of the bubble breaking device.

[0008] A further technical solution may be that the airflow driving device is a device capable of forming a negative pressure in the main bubble breaking cavity so that the cold air in the external space of the cooking device can be sucked into the main bubble breaking cavity through the cold air inlet channel.

[0009] A further technical solution may also include an electric driver, which is transmission-connected to the airflow driving device and is used to drive the airflow driving device to operate.

[0010] A further technical solution may be that the airflow driving device is a rotatable suction fan blade arranged in the main bubble breaking chamber, and the suction fan blade is used to suck the cold air from the cold air inlet channel into the main bubble breaking chamber and send it to the space below the suction fan blade when it rotates. There are many ways for the suction fan blade to obtain rotational power, such as rotating by the high-temperature bubble flow entering the main bubble breaking chamber, or rotating by the drive of an electric device. Secondly, the suction fan blade can not only suck the cold air from the external space of the cooking equipment into the main bubble breaking chamber, but also send the cold air into the space below the suction fan blade, thereby expanding the flow range and cooling range of the cold air and further improving the bubble breaking effect. In addition, the suction fan blade can also play a certain bubble breaking role during the rotation process. The suction fan blade and the cold air sucked through it break bubbles together to achieve a double bubble breaking effect.

[0011] A further technical solution may also include a rotating fan blade disposed in the main bubble breaking chamber, the rotating fan blade being located below the suction fan blade, and the rotating fan blade being used for rotating bubble breaking. In this way, the rotating fan blade can stir and squeeze the high-temperature bubble flow entering below the suction fan blade to achieve rotating bubble breaking, further improving the bubble breaking efficiency.

[0012] A further technical solution may be to provide a vacant portion on the upper or lower edge of the rotating blades for bubbles to pass through. In this way, the high-temperature bubble flow entering the rotating area of ​​the rotating blades will not be completely pushed by the rotating blades to rotate synchronously, and some bubbles will pass through the vacant portion and be punctured by the vacant portion in the process of passing through the vacant portion, further improving the bubble breaking efficiency.

[0013] In order to drive the rotating blades to rotate, the prior art often uses the high-temperature bubble flow entering the bubble breaking chamber to drive the rotating blades to rotate. In order to prevent the high-temperature bubble flow from rushing into the bubble breaking chamber from all directions to form a chaotic airflow, only one steam inlet is often configured. In this way, when the steam inlet is blocked, it will hinder the high-temperature bubble flow from entering the bubble breaking chamber and seriously affect the bubble breaking effect. In view of this, a further technical solution can also be that the rotating blades extend radially and axially, and the steam introduction channel is arranged in a tangential or oblique direction so that the high-temperature bubble flow entering the main bubble breaking chamber forms a rotating flow; in the radial direction, the lower connecting inlet set between the steam introduction channel and the main bubble breaking chamber is at least partially located within the projection range defined by the rotating blade in the axial direction, so that the high-temperature bubble flow entering the main bubble breaking chamber can be ejected directly against the side radial surface of the rotating blade and then promote the rotating blade to rotate; the rotating blade is coaxially arranged with the suction fan blade and drives the suction fan blade to rotate.

[0014] Among them, the rotating blades extend radially and axially, and the above characteristics define that the rotating blades have structural characteristics of radial extension and axial extension. Secondly, when the points on the rotating blades rotate around the rotation axis of the rotating blades, a reference circle with the rotation axis as the center is formed, and the radial direction is the extension direction of the radius of the reference circle. Viewed in the radial direction, that is, in the extension direction of the radius of the reference circle, the axial direction is the extension direction of the rotation axis of the rotating blades. Unless otherwise specified, the same meaning is used below.

[0015] Wherein, the steam introduction channel is arranged in a tangential or oblique direction, the tangential direction is a direction perpendicular to the radius of the reference circle, and the oblique direction is a direction that is not perpendicular to the radius of the reference circle and has an angle, and the angle can be 100°, 160°, etc. but not 180°. The high-temperature bubble flow entering the steam introduction channel also flows in a tangential or oblique direction under the guidance of the steam introduction channel, so that it can basically rotate in the same direction after entering the main bubble breaking chamber, reducing the occurrence of turbulence, which is beneficial to improve the conversion rate between the flow kinetic energy of the high-temperature bubble flow and the rotational kinetic energy of the rotating blades, and improve the rotation speed of the rotating blades. It can also limit the rotation direction of the suction fan blades to ensure that the suction fan blades can rotate in a direction that can make the suction fan blades produce a suction effect, and play an effective suction role. Accordingly, multiple steam introduction channels can be configured, and even if some of the steam introduction channels are blocked, the bubble breaking device will not completely lose its bubble breaking function.

[0016] Wherein, the lower through-inlet is at least partially located within the projection range defined by the rotating blades in the axial direction. The above feature defines that the lower through-inlet may be entirely or only partially located within the projection range defined by the rotating blades in the axial direction.

[0017] Among them, the high-temperature bubble flow entering the main bubble breaking chamber can be ejected directly toward the side radial surface of the rotating fan blade, which can further improve the utilization efficiency of the flow kinetic energy of the high-temperature bubble flow and increase the rotation speed of the rotating fan blade.

[0018] Among them, the rotating fan blades are coaxially arranged with the suction fan blades and drive the suction fan blades to rotate. The above characteristics define that the suction fan blades are rotated by the driving of the rotating fan blades, thus simplifying the driving structure of the suction fan blades.

[0019] A further technical solution may be that the upper connecting inlet arranged between the cold air inlet channel and the main bubble breaking chamber is located above the suction fan blade, and also includes an exhaust channel, which is connected to the main bubble breaking chamber and is used to discharge the broken water vapor in the main bubble breaking chamber. Viewed along the radial direction, the middle connecting inlet arranged between the exhaust channel and the main bubble breaking chamber is located between the upper connecting inlet and the lower connecting inlet. According to the above technical solution, firstly, the upper through-inlet is located above the suction fan blades, which is beneficial to improving the suction efficiency of the suction fan blades; secondly, the middle through-inlet is located between the upper through-inlet and the lower through-inlet, so that most of the water vapor that has broken bubbles in the main bubble breaking chamber can preferentially enter the exhaust channel through the middle through-inlet and be discharged from the main bubble breaking chamber, and will not continue to flow in large quantities toward the upper through-inlet, thereby avoiding the collision and mixing of the water vapor that has broken bubbles with the cold air that enters the main bubble breaking chamber from the cold air inlet channel to form a large amount of turbulence, thereby hindering the rotation of the suction fan blades and weakening the suction ability of the suction fan blades.

[0020] A further technical solution may also include an auxiliary bubble breaking chamber, the auxiliary bubble breaking chamber is located on the side of the main bubble breaking chamber, the exhaust channel is connected to the auxiliary bubble breaking chamber so that the water vapor in the main bubble breaking chamber can be discharged into the auxiliary bubble breaking chamber; it also includes an exhaust hole connected to the auxiliary bubble breaking chamber, the exhaust hole is used to discharge the water vapor in the auxiliary bubble breaking chamber; the exhaust hole is separated from the cold air introduction channel. According to the above technical solution, firstly, the auxiliary bubble breaking chamber can be used to perform secondary bubble breaking on the high-temperature bubbles escaping from the main bubble breaking chamber to enhance the bubble breaking efficiency; secondly, the exhaust hole is separated from the cold air introduction channel, and the above feature defines that the exhaust hole and the cold air introduction channel have a certain distance in spatial layout, so that the water vapor discharged from the exhaust hole is difficult to flow back from the cold air introduction channel to the main bubble breaking chamber in large quantities.

[0021] A further technical solution may be that the main bubble breaking chamber has a main chamber side wall, a main chamber top wall and a main chamber bottom wall, the lower through-inlet is arranged on the main chamber side wall or at a corner between the main chamber side wall and the main chamber bottom wall, and the upper through-inlet is arranged on the main chamber top wall; the auxiliary bubble breaking chamber is separated from the main bubble breaking chamber by the main chamber side wall, and the exhaust passage is arranged on the main chamber side wall.

[0022] In addition, the present invention also proposes a cooking device using the foam breaking device, characterized in that the cooking device includes a cooking pot and a pot cover that can cover the cooking pot, and the foam breaking device is arranged on the pot cover of the cooking device.

[0023] Since the present invention has the above characteristics and advantages, it can be applied to a foam breaking device for cooking equipment and cooking equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the exploded structure of a bubble breaking device 100 using the technical solution of the present invention;

[0025] Figure 2 is a schematic diagram of the three-dimensional structure of the bubble breaking device 100;

[0026] Figure 3 is a schematic cross-sectional structural diagram of the bubble breaking device 100;

[0027] Figure 4 is a schematic diagram of the three-dimensional structure of the bubble breaking base 200;

[0028] Figure 5 is a schematic structural diagram of the bubble breaking base 200 in a side view;

[0029] Figure 6 yes Figure 5 Schematic diagram of the cross-sectional structure in the AA direction;

[0030] Figure 7 yes Figure 5 Schematic diagram of the cross-sectional structure along the BB direction. DETAILED DESCRIPTION

[0031] The rotary impeller 4, the foam breaking device 100 and the structure of the cooking device to which the technical solution of the present invention is applied will be further described below in conjunction with the accompanying drawings.

[0032] As shown in the figure, the bubble breaking device 100 adopts the following bubble breaking structure, including a main bubble breaking chamber 1 and a steam inlet channel 2 for cooking steam, wherein the steam inlet channel 2 is connected to the main bubble breaking chamber 1 and is used to introduce a high-temperature bubble flow into the main bubble breaking chamber 1; it is characterized in that it also includes a cold air inlet channel 3, wherein the cold air inlet channel 3 is connected to the main bubble breaking chamber 1 and is used to provide an inlet channel for introducing cold air from the external space a of the cooking equipment into the main bubble breaking chamber 1; it also includes an airflow driving device, wherein the airflow driving device is used to introduce cold air from the external space a of the cooking equipment into the main bubble breaking chamber 1 through the cold air inlet channel 3 so that the cold air can accelerate the high-temperature bubble flow to cool and break the bubbles.

[0033] The above technical solution will be further described below in conjunction with the accompanying drawings. Figure 1 , Figure 2 and Figure 3As shown, the bubble breaking device 100 includes a main bubble breaking chamber 1, and the main bubble breaking chamber 1 has a main chamber side wall 11, a main chamber top wall 12 and a main chamber bottom wall 13, wherein the main chamber side wall 11 includes a main chamber upper side wall 111 and a main chamber lower side wall 112 which are arranged in upper and lower parts. It also includes a steam introduction channel 2, a cold air introduction channel 3 and an exhaust channel 5. The lower connecting inlet 20 arranged between the steam introduction channel 2 and the main bubble breaking chamber 1 is arranged at the corner between the main chamber lower side wall 112 and the main chamber bottom wall 13 (of course, in other embodiments, the lower connecting inlet 20 may be on the main chamber side wall 11), and the steam introduction channel 2 is used to introduce a high-temperature bubble flow into the main bubble breaking chamber 1. The upper connecting inlet 30 arranged between the cold air introduction channel 3 and the main bubble breaking chamber 1 is arranged on the main chamber top wall 12 and is located above the suction fan blade 6 to be discussed below. The cold air introduction channel 3 is used to provide an introduction channel for the cold air in the external space a of the cooking device to be introduced into the main bubble breaking chamber 1. The exhaust steam channel 5 is arranged on the side wall 11 of the main chamber. Specifically, the exhaust steam channel 5 has a channel upper wall 51 and a channel lower wall 52 which are separately arranged and can be covered up and down. The channel upper wall 51 is in the shape of a flat plate and is arranged on the upper side wall 111 of the main chamber, and the channel lower wall 52 is in the shape of a groove and is arranged on the lower side wall 112 of the main chamber. The notch of the channel lower wall 52 faces the channel upper wall 51. The exhaust steam channel 5 is connected to the main bubble breaking chamber 1, and is used to discharge the water vapor that has been broken in the main bubble breaking chamber 1.

[0034] It also includes an airflow driving device, which is a device that can form a negative pressure in the main bubble breaking chamber 1 so that the cold air in the external space a of the cooking device can be sucked into the main bubble breaking chamber 1 through the cold air introduction channel 3. The airflow driving device can be arranged inside the main bubble breaking chamber 1 to suck the cold air in the external space a of the cooking device into the main bubble breaking chamber 1; it can also be arranged outside the main bubble breaking chamber 1 to blow the cold air in the external space a of the cooking device into the main bubble breaking chamber 1. In this embodiment, the airflow driving device is a rotatable suction fan blade 6 arranged in the main bubble breaking chamber 1, and the suction fan blade 6 is used to suck the cold air from the cold air introduction channel 3 into the main bubble breaking chamber 1 and send it to the space below the suction fan blade 6 when it rotates. In this way, the cold air inlet channel 3 and the airflow driving device are used to introduce the cold air in the external space a of the cooking equipment into the main bubble breaking chamber 1, and the high-temperature bubble flow meets and mixes with the cold air in the main bubble breaking chamber 1. The cold air cools the high-temperature bubble flow to liquefy the water vapor in the high-temperature bubble flow to achieve bubble breaking. It can be seen that the bubble breaking device 100 adopts a cooling bubble breaking solution, which can achieve bubble breaking within the cooling range of the cold air, and does not require direct contact between the bubble breaking structure and the high-temperature bubble flow. Compared with the existing impeller extrusion type bubble breakers and airflow blowing type bubble breakers, the bubble breaking device 100 is easier to achieve a wider range and higher efficiency of bubble breaking. Moreover, the high-temperature bubble flow is cooled and liquefied into rice soup by the cooling air, which not only reduces the discharge of high-temperature water vapor, but also reduces the overflow of rice soup in the cooking equipment, thereby improving the anti-overflow performance of the bubble breaking device 100. In addition, the suction fan blade 6 can not only suck the cold air in the external space a of the cooking device into the main bubble breaking chamber 1, but also send the cold air into the space below the suction fan blade 6, thereby expanding the flow range and cooling range of the cold air and further improving the bubble breaking effect. In addition, the suction fan blade 6 can also play a certain bubble breaking role during the rotation process. The suction fan blade 6 and the cold air sucked through it break bubbles together, and the bubble breaking efficiency is further improved.

[0035] There are many ways for the suction fan blade 6 to obtain rotational power, such as providing an electric driver, the electric driver is connected to the suction fan blade 6, and the electric driver is used to drive the suction fan blade 6. In this embodiment, the high-temperature bubble flow entering the main bubble breaking chamber 1 is used to drive the suction fan blade 6 to rotate, which is described in detail below.

[0036] like Figure 3 to Figure 7As shown, the bubble breaking device 100 also includes a rotating impeller 4 arranged in the main bubble breaking chamber 1, and the rotating impeller 4 includes a support shaft 41 and a rotating blade 42 connected to the support shaft 41, and the rotating blade 42 is used for rotating bubble breaking. The rotating blade 42 is located below the suction fan blade 6, and the rotating blade 42 is coaxially arranged with the suction fan blade 6 and drives the suction fan blade 6 to rotate. Specifically, a connecting shaft section 411 is provided on the support shaft 41 of the rotating impeller 4, and the connecting shaft section 411 is used to transmit rotational kinetic energy. From the cross section, the connecting shaft section 411 has a non-circular cross-sectional structure. In this embodiment, the cross section of the connecting shaft section 411 is square. A pit 610 adapted to the connecting shaft section 411 is provided on the blade shaft 61 on the suction fan blade 6, and the connecting shaft section 411 extends into the pit 610 to form a radial transmission connection structure.

[0037] like Figure 6 As shown, when the point on the rotating blade 42 rotates around the rotation axis of the rotating blade 42, a reference circle b with the rotation axis as the center is formed, and the radial direction is the radial direction of the reference circle b. Figure 3 The axial direction is the direction indicated by the arrow T in the middle), that is, viewed along the radius direction of the reference circle b, and the axial direction is the axial direction of the rotation axis of the rotating fan blade 42. The tangential direction is the direction perpendicular to the radius of the reference circle b, and the oblique direction is the direction that is not perpendicular to the radius of the reference circle b and has an angle Q, and the angle Q can be 100°, 160°, etc. but not 180°. Unless otherwise specified, the same meaning shall be adopted hereinafter. The steam inlet channel 2 is arranged in an oblique direction so that the high-temperature bubble flow entering the main bubble breaking chamber 1 forms a rotating flow (of course, in other embodiments, the steam inlet channel 2 can also be arranged in a tangential direction); viewed along the radial direction ( Figure 3In the direction indicated by the middle arrow T), the lower connecting inlet 20 arranged between the steam inlet channel 2 and the main bubble breaking chamber 1 is partially located within the projection range L defined by the rotating blades 42 in the axial direction (of course, in other embodiments, the lower connecting inlet 20 can also be located as a whole within the projection range L defined by the rotating blades 42 in the axial direction), so that the high-temperature bubble flow entering the main bubble breaking chamber 1 can be ejected toward the wide side radial surface 422 of the rotating blades 42 to be discussed below, thereby promoting the rotating blades 42 to rotate, and then driving the suction fan blades 6 to rotate through the rotating blades 42. According to the above technical solution, the high-temperature bubble flow entering the steam introduction channel 2 also flows in an oblique direction under the guiding action of the steam introduction channel 2, so that it can basically rotate in the same direction after entering the main bubble breaking chamber 1, reducing the occurrence of turbulence, which is beneficial to improving the conversion rate between the flow kinetic energy of the high-temperature bubble flow and the rotational kinetic energy of the rotating blades 42, improving the rotation speed of the rotating blades 42, and can also limit the rotation direction of the suction fan blades 6 to ensure that the suction fan blades 6 can rotate in the direction of generating the suction effect, thereby playing an effective suction role. Therefore, even if multiple steam introduction channels 2 are configured, the high-temperature bubble flow entering the main bubble breaking chamber 1 from different steam introduction channels 2 will not flow around in a disorderly manner to form a large amount of turbulence, so in actual applications, more than two steam introduction channels 2 can be appropriately configured. In this embodiment, the bubble breaking device 100 is equipped with eight steam introduction channels 2, so that the soup retained in the main bubble breaking chamber 1 can be quickly discharged, and even if one or more of the steam introduction channels 2 are blocked, the other steam introduction channels 2 can still function to maintain the effectiveness of the bubble breaking function of the bubble breaking device 100. It can be seen that the present invention provides a technical basis for solving the problem of failure of the bubble breaking function caused by the blockage of the steam inlet. Of course, in other embodiments, it is also feasible for the bubble breaking device 100 to be equipped with two, three, or at least two or more steam introduction channels 2.

[0038] like Figure 7 As shown, the exhaust passage 5 is also arranged in an oblique direction and the direction in which the exhaust passage 5 guides the airflow is the same as the direction in which the steam inlet passage 2 guides the airflow (of course, in other embodiments, the exhaust passage 5 can also be arranged in a tangential direction). In this way, the process in which the broken water vapor flows from the main bubble breaking chamber 1 into the exhaust passage 5 is smoother, which is conducive to further improving the conversion rate between the flow kinetic energy of the high-temperature bubble flow and the rotational kinetic energy of the rotating blades 4, and is conducive to quickly discharging the broken water vapor.

[0039] like Figure 3 and Figure 7As shown, looking along the radial direction ( Figure 3 The middle connecting inlet 50 provided between the exhaust passage 5 and the main bubble breaking chamber 1 is located between the upper connecting inlet 30 and the lower connecting inlet 20. According to the above technical solution, most of the water vapor that has broken bubbles in the main bubble breaking chamber 1 can preferentially enter the exhaust passage 5 through the middle connecting inlet 50 and be discharged from the main bubble breaking chamber 1, and will not continue to flow in large quantities toward the upper connecting inlet 30, thereby avoiding collision and mixing with the cold air entering the main bubble breaking chamber 1 from the cold air inlet passage 3 to form a large amount of turbulence, thereby hindering the rotation of the suction fan blades 6 and weakening the suction capacity of the suction fan blades 6.

[0040] In order to further optimize the bubble breaking efficiency, Figure 1 and Figure 3As shown, further, a vacant portion 421 is provided at the upper and lower edges of the rotating impeller 4, and the vacant portion 421 allows bubbles to pass through and puncture the bubbles. In this way, the vacant portion 421 is used to form a corner at the upper and lower edges of the rotating impeller 4, and the rotating impeller 4 can not only use the rotating blades 42 to squeeze and break bubbles, but also make the high-temperature bubble flow entering the rotating area of ​​the rotating blades 42 not all be driven by the rotating blades 42 to rotate synchronously, and some bubbles pass through the vacant portion 40 and are punctured by the corner of the vacant portion 40 in the process of passing through the vacant portion 40. It can be seen that the rotating impeller 4 can not only squeeze and break bubbles with the main cavity side wall 11 during its rotation, but also use the vacant portion 40 to puncture bubbles, which has a double bubble breaking effect and greatly improves the bubble breaking efficiency. Of course, in other embodiments, it is also feasible to provide a vacant portion 421 only at one of the upper or lower edges of the rotating impeller 4. Furthermore, the rotating blade 42 is in the shape of a flat plate and extends in the axial and radial directions. The rotating blade 42 has a narrow side radial surface 423 and a wide side radial surface 422, and the wide side radial surface 422 extends substantially in the axial and radial directions. The area of ​​the wide side radial surface 422 is larger than the area of ​​the narrow side radial surface 423, and the wide side radial surface 422 is substantially parallel to the rotation axis of the rotating blade 42 (of course, in other embodiments, the wide side radial surface 422 may also pass through the rotation axis of the rotating blade 42, or may form an acute angle with the rotation axis of the rotating blade 42.). In this way, in an application environment where the rotating impeller 4 is driven to rotate by a high-temperature bubble flow, the effective windward area of ​​the rotating blade 42 may be increased by the wide side radial surface 422, thereby facilitating the conversion rate between the flow kinetic energy of the high-temperature bubble flow and the rotation kinetic energy of the rotating blade 42, and increasing the rotation speed of the rotating blade 42. A transition through hole (not shown) is provided on the blade wall where the wide side radial surface 422 is located, and the radial outer end 424 of the rotating blade 42 is sloped. In this way, the transition through hole and the radial outer end 424 of the rotating blade 42 are used to break bubbles, further optimizing the bubble breaking efficiency of the rotating impeller 4.

[0041] like Figure 3As shown, it also includes an auxiliary bubble breaking chamber 7, which is located on the side of the main bubble breaking chamber 1, and the auxiliary bubble breaking chamber 7 is separated from the main bubble breaking chamber 1 by the main chamber side wall 11. The auxiliary bubble breaking chamber 7 has an auxiliary chamber side wall 71, an auxiliary chamber top wall 73 and an auxiliary chamber bottom wall 72. The auxiliary chamber side wall 71, the auxiliary chamber bottom wall 72, the main chamber lower side wall 112 and the main chamber bottom wall 13 constitute a bubble breaking base 200. The auxiliary chamber top wall 73, the main chamber top wall 12 and the main chamber upper side wall 111 constitute a bubble breaking cover 300. The bubble breaking base 200 and the bubble breaking cover 300 are arranged and can be covered up and down, and a sealing ring 9 is arranged between the bubble breaking base 200 and the bubble breaking cover 300. The main cavity top wall 12 is detachably clamped on the upper side wall 111 of the main cavity, and an upper locator 121 for locating the front end of the blade shaft 61 of the suction fan blade 6 is provided on the main cavity top wall 12, and a lower locator 131 for locating the bottom end of the support shaft 41 of the rotating impeller 4 is provided on the auxiliary cavity bottom wall 72, which can simplify the installation of the suction fan blade 6 and the rotating fan blade 42.

[0042] The exhaust passage 5 is also connected to the auxiliary bubble breaking chamber 7 so that the water vapor in the main bubble breaking chamber 1 can be discharged into the auxiliary bubble breaking chamber 7. It also includes an exhaust hole 8 connected to the auxiliary bubble breaking chamber 7, the exhaust hole 8 is used to discharge the water vapor in the auxiliary bubble breaking chamber 7, the exhaust hole 8 is arranged on the auxiliary chamber top wall 73 and is located above the rotating fan blade 42, the cold air introduction channel 3 is arranged on the main chamber top wall 12, and the exhaust hole 8 is separated from the cold air introduction channel 3. According to the above technical solution, firstly, the auxiliary bubble breaking chamber 7 can be used to perform secondary bubble breaking on the high-temperature bubbles escaping from the main bubble breaking chamber 1 to enhance the bubble breaking efficiency; secondly, the exhaust hole 8 is separated from the cold air introduction channel 3, and the above feature defines that the exhaust hole 8 and the cold air introduction channel 3 are arranged with a certain distance in the layout space, so that the high-temperature water vapor discharged from the exhaust hole 8 will not flow back from the cold air introduction channel 3 to the main bubble breaking chamber 1 in large quantities.

[0043] In addition, the present invention also proposes a cooking device (not shown in the figure) using the foam breaking device 100, wherein the cooking device includes a cooking pot and a pot cover capable of covering the cooking pot, and the foam breaking device 100 is arranged on the pot cover of the cooking device.

Claims

1. A bubble breaking device for cooking equipment, comprising a main bubble breaking chamber and a steam introduction channel for cooking steam, wherein the steam introduction channel is connected to the main bubble breaking chamber and is used to introduce a high-temperature bubble flow into the main bubble breaking chamber; characterized in that: It also includes a cold air introduction channel, which is connected to the main bubble breaking cavity and is used to provide an introduction channel for the cold air in the external space of the cooking device to be introduced into the main bubble breaking cavity; it also includes an airflow driving device, which is used to introduce the cold air in the external space of the cooking device into the main bubble breaking cavity through the cold air introduction channel so that the cold air can accelerate the high-temperature bubble flow to cool and break the bubbles; The airflow driving device is a device capable of forming a negative pressure in the main bubble breaking cavity so as to draw cold air from the external space of the cooking device into the main bubble breaking cavity through the cold air introduction channel; The airflow driving device is a rotatable suction fan blade arranged in the main bubble breaking chamber, and the suction fan blade is used to suck cold air from the cold air introduction channel into the main bubble breaking chamber and send it to the space below the suction fan blade when it rotates; It also includes a rotating fan blade disposed in the main bubble breaking chamber, the rotating fan blade is located below the suction fan blade, and the rotating fan blade is used for rotating bubble breaking; A vacant portion through which bubbles can pass is provided at the upper edge or / and the lower edge of the rotating blade; The rotating blades extend radially and axially, and the steam introduction channel is arranged in a tangential or oblique direction so that the high-temperature bubble flow entering the main bubble breaking chamber forms a rotating flow; Viewed in the radial direction, the lower connecting inlet arranged between the steam inlet channel and the main bubble breaking chamber is at least partially located within the projection range defined by the rotating fan blade in the axial direction, so that the high-temperature bubble flow entering the main bubble breaking chamber can be ejected directly toward the side radial surface of the rotating fan blade and thus drive the rotating fan blade to rotate; the rotating fan blade is coaxially arranged with the suction fan blade and drives the suction fan blade to rotate.

2. The foam breaking device for cooking equipment according to claim 1, characterized in that: It also includes an electric driver, which is transmission-connected to the airflow driving device and is used to drive the airflow driving device to operate.

3. The foam breaking device for cooking equipment according to claim 1, characterized in that: The upper connecting inlet arranged between the cold air inlet channel and the main bubble breaking chamber is located above the suction fan blade, and also includes an exhaust channel, which is connected to the main bubble breaking chamber and is used to discharge the broken water vapor in the main bubble breaking chamber. Viewed along the radial direction, the middle connecting inlet arranged between the exhaust channel and the main bubble breaking chamber is located between the upper connecting inlet and the lower connecting inlet.

4. The foam breaking device for cooking equipment according to claim 3, characterized in that: It also includes an auxiliary bubble breaking cavity, which is located on the side of the main bubble breaking cavity. The exhaust passage is connected to the auxiliary bubble breaking cavity so that the water vapor in the main bubble breaking cavity can be discharged into the auxiliary bubble breaking cavity; it also includes an exhaust hole connected to the auxiliary bubble breaking cavity, and the exhaust hole is used to discharge the water vapor in the auxiliary bubble breaking cavity; the exhaust hole is separated from the cold air inlet passage.

5. The foam breaking device for cooking equipment according to claim 4, characterized in that: The main bubble breaking chamber comprises a main chamber side wall, a main chamber top wall and a main chamber bottom wall; the lower connecting inlet is arranged on the main chamber side wall or at a corner between the main chamber side wall and the main chamber bottom wall; the upper connecting inlet is arranged on the main chamber top wall; the auxiliary bubble breaking chamber is separated from the main bubble breaking chamber by the main chamber side wall, and the exhaust passage is arranged on the main chamber side wall.

6. A cooking device using the foam breaking device according to any one of claims 1 to 5, characterized in that: The cooking device comprises a cooking pot and a pot cover capable of covering the cooking pot, and the bubble breaking device is arranged on the pot cover of the cooking device.

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