Steam generating device and steam household appliance

Abstract

The utility model provides a steam generating device and a steam household appliance. The steam generating device comprises a water tank and a steam generator, wherein the water tank is provided with a water replenishing cavity; the bottom wall of the steam cavity is lower than the bottom wall of the water supplementing cavity, and a heating piece is arranged below the steam cavity. The assembling cavity is arranged below the water supplementing cavity and is communicated with the water supplementing cavity and the steam cavity respectively; the water control valve is arranged in the assembly cavity and used for communicating the steam cavity and the water supplementing cavity in an on-off mode, the water control valve comprises a floater, the floater comprises a floater part and a guide part arranged on the top face of the floater part in a protruding mode, a water supplementing channel is formed in the bottom wall of the water supplementing cavity or in the water control valve, and the water supplementing cavity and the water control valve are communicated through the water supplementing channel. The guiding part movably penetrates through the water supplementing channel, and a water outlet gap is formed between the guiding part and the inner wall of the water supplementing channel. Water flows out of the water outlet gap, gap water outlet is achieved, the water outlet area is reduced, therefore, downward pressure borne by the floater assembly is reduced, and the water control reliability is improved; and the guide part is matched with the water replenishing channel to limit the movement range of the floater, so that the stability of the water control level is ensured.

Description

Technical Field

[0001] The utility model relates to the field of small household appliances, in particular to a steam generating device and a steam household appliance. Background Art

[0002] How to increase the steam output speed has always been the optimization direction of steam generating devices and the research direction of steam-related household appliances. To achieve rapid steam output, there are usually two directions: one is to increase the power of the heating element, and the other is to reduce the amount of heated water. The power of the heating element cannot usually be increased infinitely, so how to reduce the amount of heated water and automatically replenish water has become the research direction in this field.

[0003] At present, the main method is to control the small water level by using the floating of the float to control whether the seal and the water supply hole are squeezed and fitted to achieve the effect of rapid steam generation. However, after using the existing products for a period of time, due to the manufacturing error of the seal itself and the process deviation during assembly, the float may tilt, etc., causing the sealing effect to deteriorate, the water level will gradually rise, which will seriously affect the stability of the water level control and cause the speed of steam generation to slow down. Utility Model Content

[0004] In view of this, it is necessary to provide a steam generating device and a steam household appliance to address the above problems, so as to ensure the sealing effect of the float.

[0005] The utility model first provides a steam generating device, comprising: a water tank, wherein the water tank has a water replenishing chamber; a steam chamber, wherein the bottom wall of the steam chamber is lower than the bottom wall of the water replenishing chamber, and a heating element is arranged below the steam chamber; an assembly chamber, wherein the assembly chamber is arranged below the water replenishing chamber and is respectively connected to the water replenishing chamber and the steam chamber; and a water control valve, wherein the water control valve is arranged in the assembly chamber, and the water control valve is used to connect the steam chamber and the water replenishing chamber in an on-off manner, wherein the water control valve comprises a float, wherein the float comprises a float portion and a guide portion protruding from the top surface of the float portion, a water replenishing channel is arranged in the bottom wall of the water replenishing chamber or in the water control valve, wherein the water replenishing chamber and the water control valve are connected via the water replenishing channel, and the guide portion can movably penetrate the water replenishing channel and has a water outlet gap between the guide portion and the inner wall of the water replenishing channel.

[0006] In the above steam generating device, the guide part is provided with a water replenishment channel. When water needs to be discharged, water will flow out from the water outlet gap between the guide part and the inner wall of the water replenishment channel, thereby realizing water outlet from the gap and reducing the water outlet area, thereby reducing the downward pressure on the float assembly and improving the reliability of water control. On the other hand, the cooperation between the guide part and the water replenishment channel can limit the range of movement of the float and avoid the phenomenon of the float tilting, so as to ensure the stability of the water level control.

[0007] In one of the embodiments, the water control valve further includes a sealing member, and the sealing member is sleeved on one end of the guide portion close to the float portion, or the sealing member is arranged on one end of the water replenishment channel close to the float portion.

[0008] With such arrangement, the top surface of the float portion and the bottom of the water replenishment channel can squeeze the sealing member to reliably seal the water outlet gap and improve the sealing effect.

[0009] In one of the embodiments, a limiting member is further provided at one end of the guide portion away from the float portion.

[0010] With such arrangement, the limiter can limit the travel of the float and prevent the float from falling out of the valve body.

[0011] In one of the embodiments, the top plate of the float is further provided with an annular groove, and the sealing member is partially embedded in the groove.

[0012] With such arrangement, the groove is used to limit the seal to prevent the seal from moving relative to the float, and can also improve the sealing performance between the seal and the float.

[0013] In one embodiment, the water control valve is detachably disposed in the assembly cavity, and the water control valve also includes a valve body, which is in the shape of a hollow cylinder, and a partition is provided on the inner wall near its upper port, the water replenishment channel is provided in the center of the partition, and the float is installed in the valve body and is located below the partition.

[0014] This arrangement makes it easy for the user to clean the water control valve and the assembly cavity after disassembling the water control valve, and the cylindrical valve body can limit and guide the float part.

[0015] In one embodiment, the inner diameter D1 of the water replenishment channel satisfies: 2mm≤D1≤8mm; the sealing element is annular, and the center diameter of the sealing element is D2, then D2 satisfies: 3mm≤D2≤10mm.

[0016] Such an arrangement is conducive to ensuring the sealing effect.

[0017] In one embodiment, the flow area of ​​the water replenishment channel is S1, and the cross-sectional area of ​​the guide portion is S2, which satisfies: 2mm 2 ≤S1-S2≤10mm 2 .

[0018] Such an arrangement can ensure the water flow velocity in the water outlet gap while preventing the float from being subjected to excessive downward pressure, thereby affecting the reliability of the float in controlling water.

[0019] In one embodiment, the water replenishment channel is straight-cylindrical, or the water replenishment channel includes an expanded diameter section, the expanded diameter section is provided at one end of the water replenishment channel close to the float portion, and the flow area of ​​the expanded diameter section gradually increases from top to bottom.

[0020] With such arrangement, when the float fails to seal the water outlet gap, the expanded diameter section allows water to flow through quickly, thereby improving the water replenishment efficiency; moreover, the expanded diameter section can also guide the float, ensuring that the top surface of the float part can fit with the expanded diameter section.

[0021] In one embodiment, the guide portion is columnar, or the guide portion includes a diameter-changing section and a fixed section, and one end of the diameter-changing section is connected to the float portion.

[0022] With such arrangement, when there is no water in the steam chamber or the water level is low, the gap between the inner wall of the expanded diameter section and the water replenishment channel is the largest, and the water flow rate flowing from the water replenishment chamber into the steam chamber is the fastest, thereby enabling rapid water replenishment when there is a lack of water in the steam chamber, improving the water replenishment efficiency, and avoiding dry burning.

[0023] In one of the embodiments, a vent is provided on the side wall of the valve body, the vent is located below the partition, and the vent is communicated with the steam chamber.

[0024] With such arrangement, the air vent can balance the air pressure difference between the inside and outside of the valve body cavity, ensuring that the water in the water replenishment cavity can flow into the steam cavity through the water outlet gap.

[0025] In one embodiment, the water control valve further includes a valve cover, which is mounted on the top of the valve body, a handle is provided on the top surface of the valve cover, and a water inlet is opened on the side wall of the valve cover, and the water inlet connects the water replenishment chamber and the water replenishment channel.

[0026] With such arrangement, the valve cover can prevent foreign matter such as dust from falling into the water supply channel and causing blockage; the handle can facilitate users to install or disassemble the water control valve.

[0027] In one embodiment, the steam chamber is disposed in the water replenishment chamber, the bottom wall of the water replenishment chamber is higher than the bottom wall of the steam chamber, and the side wall of the steam chamber is higher than the bottom wall of the water replenishment chamber.

[0028] With such arrangement, the water in the water replenishing chamber can flow into the steam chamber through the water control valve under the action of its own gravity, and it is also ensured that the water replenishing chamber will not block the upward flow of steam in the steam chamber.

[0029] In one of the embodiments, a partition is provided on the inner side wall of the assembly cavity, the partition is arranged close to the upper port of the assembly cavity, the water replenishment channel is arranged on the partition, and the float is arranged below the partition.

[0030] With such an arrangement, the partition is fixed to the inner wall of the assembly cavity and cannot be disassembled, thereby simplifying the overall structure of the water control valve and reducing the number of parts.

[0031] In one of the embodiments, the steam chamber is located outside the water replenishment chamber and outside the water tank, and a water flow channel is provided between the steam chamber and the assembly chamber.

[0032] In this arrangement, the water tank and the steam chamber are arranged separately, so that it is more convenient for the user to clean the steam chamber and also convenient for the user to add water to the water replenishing chamber.

[0033] The utility model also provides a steam household appliance, comprising the steam generating device as described above, wherein the steam household appliance is an electric steamer, a steam oven, a hanging iron, a steam mop, a steam iron, or a steam cleaning machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A cross-sectional schematic diagram of a steam household appliance provided in one embodiment of the utility model;

[0035] Figure 2 for Figure 1 A schematic cross-sectional view of a steam generating device, wherein the water control valve is in an open state;

[0036] Figure 3 for Figure 1 A schematic cross-sectional view of a steam generating device, wherein the water control valve is in a closed state;

[0037] Figure 4 for Figure 1 Installation diagram of central control water valve;

[0038] Figure 5 for Figure 1 Schematic diagram of the three-dimensional structure of the central control water valve;

[0039] Figure 6 for Figure 5 A cross-sectional schematic diagram of a first embodiment of a water control valve;

[0040] Figure 7 for Figure 6 Explosion diagram of

[0041] Figure 8 for Figure 6 A schematic cross-sectional view of the water control valve at another angle, wherein the water control valve is in an open state;

[0042] Fig. 9 for Figure 6 Dimensional diagram of a water supply channel and a sealing member in a water control valve;

[0043] Fig.10 for Figure 5A cross-sectional schematic diagram of a second embodiment of a water control valve;

[0044] Fig.11 for Figure 5 A schematic cross-sectional view of a third embodiment of a water control valve;

[0045] Fig.12 A cross-sectional schematic diagram of a steam household appliance provided in another embodiment of the utility model.

[0046] : 100, steam generating device; 10, water tank; 11, steam chamber; 12, water replenishing chamber; 13, assembly chamber; 14, water flow channel; 20, heating element; 30, water control valve; 31, valve body; 311, water replenishing channel; 3111, diameter expansion section; 312, partition; 313, air vent; 321, float; 3211, float part; 3212, guide part; 32121, diameter reducing section; 32122, fixed section; 3213, groove; 322, sealing element; 323, limit element; 33, valve cover; 331, handle; 332, water inlet; 200, base assembly; 300, steamer assembly. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0048] It should be noted that when a component is referred to as being "mounted on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component at the same time. When a component is considered to be "fixed to" another component, it may be directly fixed on the other component or there may be a central component at the same time.

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "or / and" used herein includes any and all combinations of one or more related listed items.

[0050] Steam-based household appliances, such as electric steamers that use steam to cook food, usually heat the water in the water tank through the heating element at the bottom of the pot to generate steam, and then use the steam to heat the ingredients in the steamer to achieve the purpose of cooking food. In this process, how to increase the steam output speed has always been the optimization direction of the steam generating device and the research direction of steam-based household appliances. To achieve rapid steam output, there are usually two directions, one is to increase the power of the heating element, and the other is to reduce the amount of heated water. The power of the heating element usually cannot be increased indefinitely, so how to reduce the amount of heated water and automatically replenish water has become the research direction in this field.

[0051] At present, the main method is to control the small water level by using the floating of the float to control whether the seal and the water supply hole are squeezed and fitted to achieve the effect of rapid steam generation. However, after using the existing products for a period of time, due to the manufacturing error of the seal itself and the process deviation during assembly, the float may tilt, etc., causing the sealing effect to deteriorate, the water level will gradually rise, which will seriously affect the stability of the water level control and cause the speed of steam generation to slow down.

[0052] In order to solve the above problems, Figures 1 to 12 As shown, the present application first provides a steam generating device to ensure the sealing effect of the float, thereby ensuring the stability of the water level control.

[0053] Specifically, Figure 2 , Figure 3 and Figure 6 As shown, the steam generating device 100 includes a water tank 10, a steam chamber 11, an assembly chamber 13 and a water control valve 30, wherein: the water tank 10 has a water replenishment chamber 12; the bottom wall of the steam chamber 11 is lower than the bottom wall of the water replenishment chamber 12, and a heating element 20 is provided below the steam chamber 11, and the heating element 20 is used to heat the water in the steam chamber 11; the assembly chamber 13 is provided below the water replenishment chamber 12, and is communicated with the water replenishment chamber 12 and the steam chamber 11 respectively; the water control valve 30 is provided in the assembly chamber 13, and the water control valve 30 is used to connect the steam chamber 11 and the water replenishment chamber 12 to the steam chamber 11; The water control valve 30 includes a float 321, the float 321 includes a float portion 3211 and a guide portion 3212 protruding from the top surface of the float portion 3211, a water replenishment channel 311 is provided on the bottom wall of the water replenishment chamber 12 or in the water control valve 30, the water replenishment chamber 12 and the water control valve 30 are connected through the water replenishment channel 311, the guide portion 3212 can movably penetrate the water replenishment channel 311 and has a water outlet gap with the inner wall of the water replenishment channel 311, so that the water in the water replenishment chamber 12 can flow to the steam chamber 11 through the water outlet gap.

[0054] In the steam generating device 100 provided by the embodiment of the present invention, the float 321 can float in the assembly chamber 13 according to the change of the water level b in the steam chamber 11 to open or seal the water outlet gap, thereby controlling the on-off of the steam chamber 11 and the water replenishment chamber 12. Figure 3 As shown, when there is no water in the steam chamber 11 or the water level b is low, the top surface of the float portion 3211 is separated from the bottom of the water replenishment channel 311, so that the water outlet gap is opened. At this time, the water in the water replenishment chamber 12 can flow into the steam chamber 11 through the water outlet gap, so that the water level b in the steam chamber 11 gradually rises, and the water level a in the water replenishment chamber 12 gradually decreases. Figure 2 As shown, in the process of the water level b in the steam chamber 11 gradually rising, the float 321 will also gradually float up in the assembly chamber 13 under the action of buoyancy. When the float 321 floats to the right position, the top surface of the float part 3211 contacts the bottom of the water replenishment channel 311 and seals the water outlet gap. At this time, the water in the water replenishment chamber 12 cannot flow into the steam chamber 11 through the water outlet gap. When the steam generating device 100 is working, the heating element 20 heats the water in the steam chamber 11, so that the water in the steam chamber 11 gradually evaporates, and the water level b in the steam chamber 11 gradually decreases. The float 321 will also gradually decrease in the assembly chamber 13 under the action of its own gravity, so that the float 321 opens the water outlet gap again, and the cycle continues. Since the water level in the steam chamber 11 can always be kept at a low level and the amount of water is small, the steam generating device 100 can quickly discharge steam.

[0055] The water in the water replenishment chamber 12 flows into the steam chamber 11 through the water outlet gap between the guide portion 3212 and the inner wall of the water replenishment channel 311, realizing gap water outlet, reducing the water outlet area, that is, reducing the flow area of ​​the water outlet gap, thereby reducing the downward pressure on the float 321 and improving the reliability of water control. Figure 6 As shown, the guide portion 3212 cooperates with the water replenishment channel 311 to limit the range of movement of the float 321, so that the float 321 can only rise and fall along the axis c of the water control valve 30, avoiding the float 321 from tilting, and ensuring that each time the float 321 floats up, the top surface of the float portion 3211 can accurately seal the water outlet gap, thereby ensuring the sealing effect of the float 321 and ensuring the stability of the water control water level.

[0056] like Figure 6 to Figure 7As shown, the water control valve 30 further includes a sealing member 322. In one embodiment, the sealing member 322 is sleeved on one end of the guide portion 3212 close to the float portion 3211. When the float 321 floats up to the point where the top surface of the float portion 3211 contacts the bottom of the water replenishment channel 311, the top surface of the float portion 3211 and the bottom of the water replenishment channel 311 can squeeze the sealing member 322 to reliably seal the water outlet gap and improve the sealing effect. In addition, the valve body 31, the float 321 and the sealing member 322 have a simple structure and are easy to install. When the float 321 floats up, the sealing member 322 floats up with the float 321. When the float 321 floats up to the position, the sealing member 322 and the bottom of the water replenishment channel 311 seal the water outlet gap; when the float 321 descends, the sealing member 322 descends with the float 321, and the sealing member 322 is separated from the bottom of the water replenishment channel 311 to open the water outlet gap.

[0057] like Figure 7 As shown, the top plate of the float 321 is also provided with an annular groove 3213, and the seal 322 is partially embedded in the groove 3213. The groove 3213 is used to limit the seal 322 to prevent the seal 322 from moving relative to the float 321 and affecting the water outlet or sealing effect of the water outlet gap. In addition, the groove 3213 can also improve the sealing between the seal 322 and the float 321.

[0058] In another embodiment, the sealing member 322 is disposed at one end of the water replenishment channel 311 close to the float portion 3211. When the float 321 floats up to the position, the sealing member 322 is in contact with the top surface of the float portion 3211 to seal the water outlet gap; when the float 321 descends, the sealing member 322 is separated from the top surface of the float portion 3211 to open the water outlet gap.

[0059] refer to Figures 2 to 9 As shown, the inner diameter D1 of the water replenishment channel 311 satisfies: 2mm≤D1≤8mm; the seal 322 is annular, and the middle diameter of the seal 322 is D2, then D2 satisfies: 3mm≤D2≤10mm. Such a setting can ensure that the seal 322 can completely seal the water replenishment channel when sealing, which is beneficial to improving the sealing effect. It can be understood that the seal 322 is annular, which includes a concentrically arranged outer circle, an inner circle and a middle circle located between the outer circle and the inner circle. The diameter of the outer circle can be set to d1, and the diameter of the inner circle can be set to d2, then the diameter of the middle circle D2 = (d1+d2) / 2.

[0060] It is worth mentioning that what is defined here is the inner diameter of the water replenishment channel 311, and the cross-sectional shape of the guide portion 3212 is not defined. The cross-sectional shape of the guide portion 3212 can be circular, triangular, square, or other shapes. If the cross-sectional shape of the guide portion 3212 is different, the spatial structure of the water outlet gap between the water replenishment channel 311 and the guide portion 3212 will be different, which is not defined here.

[0061] like Figures 8 to 9 As shown, the flow area of ​​the water replenishment channel 311 is S1, and the cross-sectional area of ​​the guide portion 3212 is S2, which satisfies: 2mm 2 ≤S1-S2≤10mm 2 That is, the flow area of ​​the water outlet gap meets 2mm 2 Up to 10mm 2 The flow area of ​​the water outlet gap is greater than or equal to 2mm 2 To ensure the water flow rate in the water outlet gap, so as to ensure the water replenishment efficiency; the flow area of ​​the water outlet gap is less than or equal to 10mm 2 , to prevent the float 321 from being subjected to excessive downward pressure, which would affect the reliability of the float 321 in controlling water, and also to prevent the guide portion 3212 from being tilted or offset significantly when rising or falling in the water replenishment channel 311, which would cause the top surface of the float portion 3211 to be unable to seal the water outlet gap.

[0062] like Figures 2 to 7 As shown, in one embodiment, the water control valve 30 can be detachably arranged in the assembly chamber 13, and the water control valve 30 also includes a valve body 31, the valve body 31 is hollow and cylindrical, and a partition 312 is arranged on the inner side wall near the upper port thereof, the water replenishment channel 311 is arranged at the center of the partition 312, and the float 321 is installed in the valve body 31 and is located below the partition 312. In the assembled state, the outer wall of the valve body 31 is sealed and connected with the inner wall of the assembly chamber 13 to prevent the water in the water replenishment chamber 12 from flowing into the steam chamber 11 through the gap between the outer wall of the valve body 31 and the inner wall of the assembly chamber 13. The float 321 can be disassembled from the assembly chamber 13 together with the valve body 31, so that the user can clean the water control valve 30, the assembly chamber 13, and the parts of the steam chamber 11 and the water replenishment chamber 12 covered by the water control valve 30 after disassembling the water control valve 30. The cylindrical valve body 31 can limit and guide the float part 3211, so that the float part 3211 can only rise and fall in the area surrounded by the inner wall of the valve body 31 and the partition 312, and will not float to other positions in the steam chamber 11. In addition, since a large number of bubbles will be generated when the water in the steam chamber 11 boils and generates steam, the bubbles will roll and burst on the water surface, causing the water surface to fluctuate. Therefore, the cylindrical valve body 31 can also improve the stability of the float 321, and prevent the float 321 from swinging or tilting due to the fluctuation of the water surface, thereby affecting the water outlet or sealing effect of the water replenishment channel 311.

[0063] When the water level b in the steam chamber 11 rises to cover the opening at the bottom of the valve body 31, the chamber of the valve body 31 is a closed space, and the water in the water replenishment chamber 12 cannot flow into the valve body 31 and the steam chamber 11. Therefore, a vent 313 is provided on the side wall of the valve body 31, and the vent 313 is located below the partition 312, and the vent 313 is connected to the steam chamber 11. The vent 313 can balance the pressure difference between the inside and outside of the valve body 31 cavity, and ensure that the water in the water replenishment chamber 12 can flow into the steam chamber 11 through the water outlet gap. The number of the vents 313 can be one, two or more, and the multiple vents 313 are arranged at intervals along the circumference of the valve body 31.

[0064] like Figure 5 As shown, the vent 313 can be a waist-shaped hole as shown in the figure. When the vent 313 is blocked by bubbles, the bubbles are more likely to break in the waist-shaped hole than in the circular hole, so that the ventilation effect of the vent 313 can be further guaranteed, and the water in the water replenishment chamber 12 can flow into the steam chamber 11 normally. In addition, the waist-shaped hole extends along the axis d direction of the water control valve 30. Even if the water level b in the steam chamber 11 submerges part of the waist-shaped hole, the cavity of the valve body 31 can also be ventilated through the part that is not submerged by the waist-shaped hole. Alternatively, the vent 313 can also extend along the axis d of the water control valve 30 to the bottom of the valve body 31 to form a gap structure. Of course, the shape of the vent 313 can also be a regular or irregular structure such as a circle, an ellipse, a rectangle, a triangle, etc., as long as it is ensured that no enclosed space is formed in the cavity of the valve body 31, and the embodiment of the utility model is not specifically limited here.

[0065] In another embodiment, the water control valve 30 may also be non-detachable, and a partition 312 is provided on the inner wall of the assembly cavity 13, the partition 312 is provided close to the upper port of the assembly cavity 13, the water replenishment channel 311 is provided on the partition 312, and the float 321 is provided below the partition 312. The partition 312 is fixed to the inner wall of the assembly cavity 13 and cannot be disassembled, thereby simplifying the overall structure of the water control valve 30 and reducing the number of parts.

[0066] like Figures 5 to 7As shown, the water control valve 30 also includes a valve cover 33, which is installed at the top of the valve body 31. The top surface of the valve cover 33 is provided with a handle 331, and the side wall of the valve cover 33 is provided with a water inlet 332, which connects the water replenishment chamber 12 and the water replenishment channel 311. The valve cover 33 is arranged above the water replenishment channel 311, and is surrounded by the partition 312 to form a water inlet channel connected to the water replenishment channel 311. The water in the water replenishment chamber 12 can enter the water replenishment chamber 12 through the water inlet 332, the water inlet channel and the water outlet gap in sequence. The valve cover 33 can prevent foreign dust and other impurities from falling into the water replenishment channel 311 and causing blockage, and ensure that the water in the water replenishment chamber 12 can flow into the steam chamber 11 normally through the water replenishment channel 311 to avoid dry burning. In addition, the handle 331 can facilitate users to install or disassemble the water control valve 30.

[0067] like Figures 6 to 8 As shown, in order to prevent the guide part 3212 from completely falling out of the water replenishment channel 311 when the float 321 descends relative to the valve body 31, a stopper 323 is further provided at one end of the guide part 3212 away from the float part 3211. The maximum length dimension of the stopper 323 is greater than the maximum length dimension of any two points on the wall of the water replenishment channel 311, and the stopper 323 cannot pass through the water replenishment channel 311. When the float 321 descends relative to the valve body 31 to the point where the stopper 323 abuts against the side of the partition 312 away from the float part 3211, the float 321 cannot continue to descend, thereby limiting the travel of the float 321 and preventing the float 321 from falling out of the valve body 31.

[0068] In addition, the stopper 323 is detachably connected to the guide portion 3212, so that the user can clean the control float 321 and the valve body 31 after disassembly. During the assembly process, the guide portion 3212 of the float 321 can be passed through the water replenishment channel 311 first, and then the stopper 323 is installed to the end of the guide portion 3212 away from the float portion 3211, so that the guide portion 3212 cannot escape from the water replenishment channel 311.

[0069] like Figure 6 As shown, in one embodiment, the water replenishment channel 311 is in a straight cylindrical shape, so as to ensure the stability of the guide portion 3212 when it is raised and lowered in the straight cylindrical water replenishment channel 311, and avoid the phenomenon of the float 321 tilting.

[0070] like Figure 10 to Figure 11As shown, in another embodiment, the water replenishment channel 311 includes an expanded diameter section 3111, which is arranged at one end close to the float part 3211, and the flow area of ​​the expanded diameter section 3111 gradually increases from top to bottom, so that when the float 321 floats to the right position, the seal 322 is sealed and connected with the inner wall of the expanded diameter section 3111. That is, the end of the water replenishment channel 311 away from the float part 3211 is straight. When the seal 322 or the top surface of the float part 3211 does not seal the water outlet gap, the gap between the inner wall of the expanded diameter section 3111 and the guide part 3212 is large, so that the water flow can pass quickly, thereby improving the water replenishment efficiency. In addition, the expanded diameter section 3111 can also guide the seal 322 and the float 321. Even if the float 321 is slightly offset during the floating process, when the float 321 floats to its full position, the top surface of the seal 322 or the float 321 can fit against the expanded diameter section 3111 and the float 321 can be reset, thereby further improving the sealing effect of the top surface of the seal 322 or the float 321 on the water outlet gap.

[0071] like Figure 6 and Fig.10 As shown, in one embodiment, the guide portion 3212 is columnar. The guide portion 3212 has a simple structure and is easy to produce and assemble.

[0072] like Fig.11 As shown, in another embodiment, the guide portion 3212 includes a variable diameter section 32121 and a fixed section 32122, and one end of the variable diameter section 32121 is connected to the float portion 3211. The other end of the variable diameter section 32121 is connected to the fixed section 32122, and the circumferential area of ​​the variable diameter section 32121 gradually decreases from the float portion 3211 toward the fixed section 32122. Among them, the stopper 323 is in the fixed section 32122, and the inner diameter of the water replenishment channel 311 is slightly larger than the outer diameter of the fixed section 32122, which ensures that the water flow can pass normally while avoiding the phenomenon of the float 321 tilting. When there is no water in the steam chamber 11 or the water level b is low, the float 321 can be lowered relative to the valve body 31 to a position where the stopper 323 abuts against the side of the valve body 31 away from the float portion 3211. At this time, the gap between the inner wall of the enlarged diameter section 3111 and the reduced diameter section 32121 is the largest, and the water flow rate from the water replenishment chamber 12 into the steam chamber 11 is the fastest. When the water level b in the steam chamber 11 gradually rises, the float 321 gradually floats relative to the valve body 31. At this time, the gap between the inner wall of the enlarged diameter section 3111 and the reduced diameter section 32121 gradually decreases, and the water flow rate from the water replenishment chamber 12 into the steam chamber 11 gradually decreases. Thereby, it is possible to quickly replenish water when there is a lack of water in the steam chamber 11, improve the water replenishment efficiency, and avoid dry burning due to lack of water in the steam chamber 11.

[0073] Further, the seal 322 is a silicone or rubber part, and the hardness of the seal 322 is 20 to 70 degrees. The production and manufacturing costs of silicone and rubber parts are low. In addition, the hardness of the seal 322 can be any value within the range of 20 to 70 degrees, such as 20 degrees, 21 degrees, 22 degrees... 69 degrees, 70 degrees, etc., to avoid the seal 322 being too small in hardness, causing the seal 322 to be damaged under the squeeze of the float 321 and the valve body 31 or the action of water pressure, and also to avoid the seal 322 being too hard, causing the seal 322 to be unable to fit tightly with the float 321 and the valve body 31, thereby affecting the sealing effect. Among them, the seal 322 is preferably a circular ring seal, and the hardness of the seal 322 is preferably 30 to 40 degrees. Of course, the seal 322 can also be other annular structures such as an elliptical ring and a polygonal ring, and the embodiment of the utility model is not specifically limited here.

[0074] like Figures 1 to 4 As shown, in one embodiment, the steam chamber 11 is disposed in the water replenishment chamber 12, the bottom wall of the water replenishment chamber 12 is higher than the bottom wall of the steam chamber 11, and the side wall of the steam chamber 11 is higher than the bottom wall of the water replenishment chamber 12. Looking from top to bottom, the bottom wall of the steam chamber 11 and the bottom wall of the water replenishment chamber 12 at least partially overlap, so as to reduce the overall volume of the steam chamber 11 and the water replenishment chamber 12, thereby reducing the volume of the steam generating device 100. The water in the water replenishment chamber 12 can flow into the steam chamber 11 through the water control valve 30 under the action of its own gravity, and it is also ensured that the water replenishment chamber 12 will not block the steam in the steam chamber 11 from flowing upward.

[0075] like Fig.12 As shown, in another embodiment, the steam chamber 11 is located outside the water replenishment chamber 12 and outside the water tank 10, and a water flow channel 14 is also provided between the steam chamber 11 and the assembly chamber 13. The water tank 10 and the steam chamber 11 are provided separately, so that it is more convenient for the user to clean the steam chamber 11 and also convenient for the user to add water to the water replenishment chamber 12. After the water in the water replenishment chamber 12 enters the water control valve 30 under the action of its own gravity, it needs to flow into the steam chamber 11 through the water flow channel 14.

[0076] like Figure 1 As shown, the utility model also provides a steam household appliance, comprising a base assembly 200, a steamer assembly 300 and the above-mentioned steam generating device 100, wherein the steam generating device 100 is arranged in the base assembly 200, and the steamer assembly 300 is mounted on the base assembly 200. The steam generating device 100 can generate steam and heat the food in the steamer assembly 300.

[0077] The steam household appliance may be an electric steamer, a steam oven, a hanging iron, a steam mop, a steam iron, a steam cleaning machine or other household appliance that generates steam by heating the water tank 10 with the heating element 20 .

[0078] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0079] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A steam generating device, characterized in that: include: A water tank (10), wherein the water tank (10) has a water replenishment chamber (12); A steam chamber (11), wherein the bottom wall of the steam chamber (11) is lower than the bottom wall of the water replenishment chamber (12), and a heating element (20) is provided below the steam chamber (11); an assembly chamber (13), the assembly chamber (13) being arranged below the water replenishment chamber (12) and being in communication with the water replenishment chamber (12) and the steam chamber (11) respectively; and A water control valve (30), the water control valve (30) being arranged in the assembly cavity (13), the water control valve (30) being used to connect the steam cavity (11) and the water replenishment cavity (12) in an on-off manner, the water control valve (30) comprising a float (321), the float (321) comprising a float portion (3211) and a guide portion (3212) protruding from the top surface of the float portion (3211), a water replenishment channel (311) being arranged on the bottom wall of the water replenishment cavity (12) or in the water control valve (30), the water replenishment cavity (12) and the water control valve (30) being connected via the water replenishment channel (311), the guide portion (3212) being movably arranged to penetrate the water replenishment channel (311) and having a water outlet gap between the guide portion (3212) and the inner wall of the water replenishment channel (311).

2. The steam generating device according to claim 1, characterized in that: The water control valve (30) further comprises a sealing member (322), wherein the sealing member (322) is sleeved on one end of the guide portion (3212) close to the float portion (3211), or the sealing member (322) is arranged on one end of the water replenishment channel (311) close to the float portion (3211).

3. The steam generating device according to claim 1, characterized in that: A limiting member (323) is also provided at one end of the guide portion (3212) away from the float portion (3211).

4. The steam generating device according to claim 2, characterized in that: The top plate of the float (321) is also provided with an annular groove (3213), and the sealing member (322) is partially embedded in the groove (3213).

5. The steam generating device according to claim 2, characterized in that: The water control valve (30) is detachably arranged in the assembly cavity (13), and the water control valve (30) further comprises a valve body (31), the valve body (31) is in the shape of a hollow cylinder, and a partition (312) is arranged on the inner side wall close to the upper port thereof, the water replenishment channel (311) is arranged at the center of the partition (312), and the float (321) is installed in the valve body (31) and is located below the partition (312).

6. The steam generating device according to claim 5, characterized in that: The inner diameter D1 of the water replenishment channel (311) satisfies: 2mm≤D1≤8mm; the sealing member (322) is annular, and the middle diameter of the sealing member (322) is D2, then D2 satisfies: 3mm≤D2≤10mm.

7. The steam generating device according to claim 5, characterized in that: The flow area of ​​the water replenishment channel (311) is S1, and the cross-sectional area of ​​the guide portion (3212) is S2, which satisfies: 2mm 2 ≤S1-S2≤10mm 2 .

8. The steam generating device according to claim 1, characterized in that: The water replenishment channel (311) is in a straight cylindrical shape, or the water replenishment channel (311) includes an expanded diameter section (3111), the expanded diameter section (3111) is arranged at one end of the water replenishment channel (311) close to the float portion (3211), and the flow area of ​​the expanded diameter section (3111) gradually increases from top to bottom.

9. The steam generating device according to claim 1, characterized in that: The guide portion (3212) is columnar, or the guide portion (3212) includes a diameter-changing section (32121) and a fixed section (32122), and one end of the diameter-changing section (32121) is connected to the float portion (3211).

10. The steam generating device according to claim 5, characterized in that: A vent (313) is provided on the side wall of the valve body (31), the vent (313) is located below the partition (312), and the vent (313) is communicated with the steam chamber (11).

11. The steam generating device according to claim 5, characterized in that: The water control valve (30) further comprises a valve cover (33), wherein the valve cover (33) is mounted on the top end of the valve body (31), a handle (331) is provided on the top surface of the valve cover (33), and a water inlet (332) is provided on the side wall of the valve cover (33), wherein the water inlet (332) is connected to the water replenishment chamber (12) and the water replenishment channel (311).

12. The steam generating device according to claim 1, characterized in that: The steam chamber (11) is arranged in the water replenishment chamber (12), the bottom wall of the water replenishment chamber (12) is higher than the bottom wall of the steam chamber (11), and the side wall of the steam chamber (11) is higher than the bottom wall of the water replenishment chamber (12).

13. The steam generating device according to claim 1, characterized in that: The inner side wall of the assembly cavity (13) is provided with a partition (312), the partition (312) is arranged close to the upper port of the assembly cavity (13), the water replenishment channel (311) is arranged on the partition (312), and the float (321) is arranged below the partition (312).

14. The steam generating device according to claim 1, characterized in that: The steam chamber (11) is located outside the water replenishment chamber (12) and outside the water tank (10), and a water flow channel is also provided between the steam chamber (11) and the assembly chamber (13).

15. A steam household appliance, characterized in that: It comprises the steam generating device according to any one of claims 1 to 14, wherein the steam household appliance is an electric steamer, a steam oven, a hanging iron, a steam mop, a steam iron, or a steam cleaning machine.

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