Flow limiting device, water tank assembly and cleaning machine

Abstract

The utility model discloses a flow limiting device, a water tank assembly and a cleaning machine. The flow limiting device comprises a shell and a flow limiting assembly. The shell is provided with a water passing channel and a water outlet communicating with the water passing channel. The flow limiting assembly comprises a flow limiting piece and an elastic piece, and the flow limiting piece is rotatably arranged at the water outlet so as to open or close the water outlet; the elastic piece is arranged on the shell and provides a first acting force for continuously closing the water outlet for the flow limiting piece so as to limit one-way conduction of water flow from the water passing channel to the outside of the water outlet; the flow limiting piece is used for opening the water outlet when the second acting force of water flow in the water passing channel on the flow limiting piece is larger than the first acting force. The utility model provides the flow limiting device which can supply water unidirectionally, and is simple in structure and low in manufacturing cost.

Description

Technical Field

[0001] This utility model relates to the field of cleaning equipment technology, and in particular to a flow limiting device, a water tank assembly, and a cleaning machine. Background Technology

[0002] In cleaning equipment, the water tank is used to store water. The water inlet of the tank is connected to the external water system. When the water flow in the tank is unstable or there is too much foam, the water in the tank will overflow from the inlet, which can cause the equipment to leak electricity and increase the risk of electric shock. The existing treatment method usually uses an electronic check valve. Electronic check valves require external circuitry, have a complex structure, and are expensive to manufacture. Utility Model Content

[0003] The main purpose of this utility model is to propose a flow limiting device, a water tank assembly, and a cleaning machine. The flow limiting device can supply water in one direction, has a simple structure, and low manufacturing cost.

[0004] To achieve the above objectives, the current limiting component proposed in this utility model includes:

[0005] The housing has a water passage and a water outlet communicating with the water passage;

[0006] A flow-limiting component includes a flow-limiting element and an elastic element. The flow-limiting element is rotatably disposed at the water outlet to open or close the water outlet. The elastic element is disposed on the housing and provides a first force to the flow-limiting element to continuously close the water outlet, thereby restricting the water flow from the water passage to the outside of the water outlet in a one-way direction. The flow-limiting element is used to open the water outlet when the second force of the water flow in the water passage on the flow-limiting element is greater than the first force.

[0007] In one embodiment, the flow limiting member includes a limiting part and a flow limiting plate disposed on the limiting part. The limiting part is rotatably disposed on the housing and abuts against the elastic member, so that the elastic member is in a compressed state and provides the first force to the flow limiting member. The flow limiting plate is located at the outlet and can rotate with the rotation of the limiting part.

[0008] In one embodiment, the limiting part includes a limiting plate, which is disposed on one side of the flow limiting plate and abuts against the elastic member. When the flow limiting member closes the water outlet, the projection of the water outlet falls on the flow limiting plate along the water inlet direction of the water passage, and at least a portion of the projection of the elastic member falls on the limiting plate.

[0009] In one embodiment, the flow limiting component further includes a rotating column. The outer wall of the housing is provided with a mounting hole, and the rotating column is rotatably disposed in the mounting hole. The rotating column is disposed on the same side of the flow limiting plate and the limiting plate facing the housing.

[0010] In one embodiment, the limiting part further includes a connecting plate, one end of which is connected to the rotating column, and the other end of which is connected to the flow limiting plate and the limiting plate. The flow limiting plate and the limiting plate are located on opposite sides of the connecting plate, and the elastic element is disposed on the limiting plate.

[0011] In one embodiment, the limiting part further includes a baffle, which is disposed on the limiting plate and surrounds the limiting plate and the connecting plate to form a limiting groove, and one end of the elastic member is limited within the limiting groove;

[0012] And / or, a first positioning part is provided on the outer peripheral wall of the housing, one end of the elastic member is positioned in cooperation with the first positioning part, a second positioning part is provided on the side of the limiting plate facing the housing, and the other end of the elastic member is positioned in cooperation with the second positioning part.

[0013] In one embodiment, the housing includes a main body and a buffer enclosure. The buffer enclosure is located at one end of the main body near the outlet and encloses the main body to form the water passage. The inner wall of the buffer enclosure has a buffer surface, and an clearance space is formed between the outer wall of the buffer enclosure and the main body. Part of the flow limiting component is located within the clearance space.

[0014] In one embodiment, the buffer enclosure includes a buffer plate and a guide plate. The buffer plate is provided with the buffer surface, and the guide plate is located at one end of the buffer plate near the water outlet. The guide plate and the shell body enclose the water outlet. The guide plate extends along the water inlet direction of the water passage.

[0015] And / or, the housing has a water inlet communicating with the water passage, and the opening area of ​​the water inlet is larger than the opening area of ​​the water outlet;

[0016] And / or, the buffer surface extends along the water inlet direction of the water passage and is inclined toward the outlet.

[0017] In one embodiment, the buffer plate is provided with a first positioning part, the elastic element is disposed in the clearance space and one end of it is positioned in cooperation with the first positioning part, the flow limiting element is provided with a second positioning part, and the other end of the elastic element is positioned in cooperation with the second positioning part.

[0018] This utility model also proposes a water tank assembly, which includes a tank body and a flow limiting device as described above. The tank body has a receiving cavity and a water inlet communicating with the receiving cavity. The housing is disposed on the tank body and located at the water inlet. The water outlet of the housing is communicating with the receiving cavity.

[0019] In one embodiment, the outlet of the housing and / or the flow restrictor are disposed within the receiving cavity and are located below the top wall of the receiving cavity at the inlet hole;

[0020] And / or, the flow limiting component further includes a seal disposed at the water inlet to seal the gap between the housing and the box body;

[0021] And / or, one of the housing and the box body is provided with a positioning part, and the other is provided with a mating part adapted to the positioning part, and the housing is positioned and installed with the box body through the positioning part;

[0022] And / or, the water inlet is located at the top of the tank body, and the water passage extends in the water tank assembly in a top-to-bottom direction.

[0023] This utility model also proposes a cleaning machine, which includes the water tank assembly described above.

[0024] The flow limiting device of this utility model includes a housing and a flow limiting component. The housing has a water passage and a water outlet. The flow limiting component includes a flow limiting element and an elastic element. The flow limiting element is rotatably disposed at the water outlet to open or close the water outlet. The elastic element is disposed on the housing and provides a first force to the flow limiting element to continuously close the water outlet, thereby restricting the water flow from the water passage to the outside of the water outlet in a one-way manner. The flow limiting element is used to open the water outlet when the second force of the water flow on the flow limiting element in the water passage is greater than the first force. With this configuration, the flow limiting device of this solution does not involve electrical components, and only the cooperation of the flow limiting element and the elastic element is needed to achieve unidirectional water supply. When there is no water or the water flow is small in the water channel, the elastic element provides a first force to the flow-limiting element, causing the flow-limiting element to continuously close the outlet. When the water flow in the water channel is large, the water pressure pushes the flow-limiting element to rotate, causing the flow-limiting element to open the outlet. Because the elastic element continuously provides a first force to close the outlet, when the water pressure disappears, the flow-limiting element will continue to close the outlet. The flow-limiting component is applied to the water tank assembly, and the water inside the tank cannot generate the force to make the flow-limiting element rotate and open the outlet, thus preventing the water in the tank from overflowing from the outlet. Therefore, this utility model provides a flow-limiting device that can supply water in one direction and has a simple structure. This flow-limiting device does not involve electrical components and has low manufacturing cost. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0026] Figure 1 A schematic diagram of the structure of an embodiment of the water tank assembly provided by this utility model;

[0027] Figure 2 for Figure 1 A sectional view of the structure in the middle;

[0028] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0029] Figure 4 A schematic diagram of an embodiment of the current limiting device provided by this utility model;

[0030] Figure 5 for Figure 4 A schematic diagram of the decomposed structure in the image;

[0031] Figure 6 for Figure 4 Sectional view of the structure

[0032] Figure 7 for Figure 4 A schematic diagram showing the flow restrictor opening the outlet.

[0033] Figure 8 for Figure 5 A schematic diagram of the shell structure in the middle;

[0034] Figure 9 for Figure 5 A schematic diagram of the current-limiting component in the diagram.

[0035] Explanation of icon numbers:

[0036] 10. Current limiting device;

[0037] 100. Shell; 110. Water passage; 111. Buffer surface; 120. Outlet; 130. Inlet; 140. Mounting hole; 150. First positioning part; 160. Shell body; 161. Mounting plate; 170. Buffer enclosure; 171. Buffer plate; 172. Guide plate; 180. Clearance space;

[0038] 200. Flow limiting component; 210. Flow limiting element; 211. Limiting part; 2111. Limiting plate; 2112. Connecting plate; 2113. Baffle; 2114. Limiting groove; 2115. Second positioning part; 212. Flow limiting plate; 213. Rotating column; 220. Elastic element;

[0039] 300. Seals;

[0040] 20. Water tank assembly; 21. Tank body; 22. Receiving cavity.

[0041] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0042] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0043] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0044] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0045] This utility model proposes a flow limiting device, a water tank assembly including the flow limiting device, and a cleaning machine including the water tank assembly.

[0046] Please see Figures 4 to 7In one embodiment of this utility model, the flow limiting device 10 includes a housing 100 and a flow limiting component 200. The housing 100 has a water passage 110 and a water outlet 120 communicating with the water passage 110. The flow limiting component 200 includes a flow limiting member 210 and an elastic member 220. The flow limiting member 210 is rotatably disposed at the water outlet 120 to open or close the water outlet 120. The elastic member 220 is disposed on the housing 100 and provides a first force to the flow limiting member 210 to continuously close the water outlet 120, thereby restricting the water flow from the water passage 110 to the outside of the water outlet 120 in a unidirectional manner. The flow limiting member 210 is used to open the water outlet 120 when the second force of the water flow in the water passage 110 on the flow limiting member 210 is greater than the first force.

[0047] It is understood that the flow limiting device 10 is used for unidirectional water supply. The flow limiting device 10 can be applied not only to cleaning machines, but also to other equipment that requires unidirectional water supply, and is not limited here. In this solution, the flow limiting device 10 is applied to the water tank assembly 20. The flow limiting device 10 includes a housing 100, and the water tank assembly 20 includes a tank body 21. The housing 100 can be installed at the water inlet of the tank body 21. Water flowing into the housing 100 can only flow unidirectionally into the tank body 21 along the housing 100, so as to prevent water in the tank body 21 from overflowing from the water inlet.

[0048] Furthermore, the shape of the housing 100 is not limited; for example, the housing 100 can be cylindrical or square. The elastic element 220 can be made of an elastic material, such as silicone or vapor phase adhesive; or, the elastic element 220 itself is elastic, for example, it is a spring. The specific installation position of the elastic element 220 is not limited; the elastic element 220 can abut against or connect with the flow restrictor 210, as long as the elastic element 220 can provide the flow restrictor 210 with a first force that continuously closes the outlet 120. This first force can be a pushing force or a pulling force.

[0049] The flow limiting device 10 of this utility model includes a housing 100 and a flow limiting component 200. The housing 100 has a water passage 110 and a water outlet 120. The flow limiting component 200 includes a flow limiting element 210 and an elastic element 220. The flow limiting element 210 is rotatably disposed at the water outlet 120 to open or close the water outlet 120. The elastic element 220 is disposed on the housing 100 and provides a first force to the flow limiting element 210 to continuously close the water outlet 120, so as to restrict the water flow from the water passage 110 to the water outlet 120 in a one-way direction. The flow limiting element 210 is used to open the water outlet 120 when the second force of the water flow in the water passage 110 on the flow limiting element 210 is greater than the first force. With this configuration, the flow limiting device 10 of this solution does not involve electrical components, and only the cooperation of the flow limiting element 210 and the elastic element 220 is needed to achieve one-way water supply. When there is no water or the water flow is small in the water channel, the elastic element 220 provides a first force to the flow restrictor 210, causing the flow restrictor 210 to continuously close the outlet 120. When the water flow in the water channel is large, the water pressure pushes the flow restrictor 210 to rotate, causing the flow restrictor 210 to open the outlet 120. Because the elastic element 220 continuously provides a first force to the flow restrictor 210 to close the outlet 120, when the water pressure disappears, the flow restrictor 210 will continue to close the outlet 120. The flow restrictor 200 is applied to the water tank assembly 20, and the water in the tank 21 cannot generate the force to make the flow restrictor 210 rotate and open the outlet 120, thus preventing the water in the tank 21 from overflowing from the outlet 120. Therefore, this utility model provides a flow restrictor 10 that can supply water in one direction and has a simple structure. This flow restrictor 10 does not involve electrical components and has low manufacturing cost.

[0050] Please see Figures 5 to 7 In one embodiment, the flow limiting member 210 includes a limiting part 211 and a flow limiting plate 212 disposed on the limiting part 211. The limiting part 211 is rotatably disposed on the housing 100 and abuts against the elastic member 220, so that the elastic member 220 is in a compressed state and provides the first force to the flow limiting member 210. The flow limiting plate 212 is located at the outlet 120 and can rotate with the rotation of the limiting part 211.

[0051] Understandably, the limiting part 211 is rotatably mounted on the housing 100, and the flow limiting plate 212 is located on the side of the limiting part 211 near the outlet 120. The flow limiting plate 212 can rotate with the rotation of the limiting part 211 to open or close the outlet 120. The elastic member 220 can be located between the limiting part 211 and the housing 100. The limiting part 211 abuts against one end of the elastic member 220, causing the elastic member 220 to be in a compressed state. The compressed elastic member 220 has a tendency to return to its original position and applies a force to the limiting part 211. This force provides the first force to the flow limiting plate 212, so that the flow limiting plate 212 continuously closes the outlet 120. In other words, when the flow restrictor 212 is not impacted by the water flow in the water passage 110 or the impact force is less than the first force, the flow restrictor 212 will not rotate, and the elastic force of the elastic element 220 can ensure that the flow restrictor 212 continuously closes the outlet 120; when the flow restrictor 212 is impacted by the water flow in the water passage 110, and the second force of the impact is greater than the first force, the flow restrictor 212 will rotate and open the outlet 120, and the water flow in the water passage 110 will flow into the water tank from the outlet 120; when the external water source stops supplying water to the water passage 110, because the elastic element 220 continuously provides the first force to the flow restrictor 212, under the action of the first force, the flow restrictor 212 will close the outlet 120, thus realizing the function of unidirectional flow guidance.

[0052] Please see Figure 5 , Figure 6 and Figure 9 In one embodiment, the limiting part 211 includes a limiting plate 2111, which is disposed on one side of the flow limiting plate 212 and abuts against the elastic member 220. When the flow limiting member 210 closes the outlet 120, the projection of the outlet 120 falls on the flow limiting plate 212 along the water inlet direction of the water passage 110, and at least part of the projection of the elastic member 220 falls on the limiting plate 2111.

[0053] Understandably, the surface area of ​​the flow restrictor 212 facing the outlet 120 is larger than the opening area of ​​the outlet 120, so that the flow restrictor 212 can completely close the outlet 120. The limiting plate 2111 abuts against one end of the elastic member 220 to limit the position of the elastic member 220. Figure 6As shown, when the flow restrictor 210 closes the outlet 120, the downward projection of the outlet 120 falls entirely on the flow restrictor 212, and the downward projection of the elastic element 220 can partially fall on the limiting plate 2111. Alternatively, the entire downward projection of the elastic element 220 can fall on the limiting plate 2111. In this design, when the flow restrictor 210 closes the outlet 120, the entire downward projection of the elastic element 220 falls on the limiting plate 2111. The elastic element 220 can extend along the height direction to improve the stability of its installation and the stability of the first force provided by the elastic element 220 to the flow restrictor 210.

[0054] In one embodiment, the flow restrictor 210 further includes a rotating column 213. The outer wall of the housing 100 has a mounting hole 140, and the rotating column 213 is rotatably disposed within the mounting hole 140. The rotating column 213 is located on the same side of the flow restrictor 212 and the limiting plate 2111 facing the housing 100. This arrangement ensures that when the limiting plate 2111 and the flow restrictor 212 rotate relative to the housing 100 via the rotating column 213, their rotation directions are the same. The limiting plate 2111 can drive the flow restrictor 212 to rotate synchronously. The flow restrictor 210 has a reasonable structural arrangement, and the method of rotating to open or close the outlet 120 is simple, which helps to simplify the structure of the flow restrictor 210.

[0055] In one embodiment, a mounting plate 161 is provided on the outer wall of the housing 100, and a mounting hole 140 is provided on the mounting plate 161. The rotating column 213 is rotatably disposed in the mounting hole 140. This arrangement facilitates the machining of the mounting hole 140 on the housing 100, and also facilitates the installation of the rotating column 213.

[0056] Please see Figure 6 , Figure 7 and Figure 9 In one embodiment, the limiting part 211 further includes a connecting plate 2112. One end of the connecting plate 2112 is connected to the rotating column 213, and the other end of the connecting plate 2112 is connected to the flow limiting plate 212 and the limiting plate 2111. The flow limiting plate 212 and the limiting plate 2111 are located on opposite sides of the connecting plate 2112, and an elastic element 220 is disposed on the limiting plate 2111. This arrangement separates the flow limiting plate 212 and the limiting plate 2111, and the elastic element 220 is disposed on the limiting plate 2111. The elastic element 220 is located on the side of the connecting plate 2112 facing away from the flow limiting plate 212. When the flow limiting assembly 200 is installed on the housing 100, the flow limiting plate 212 and the elastic element 220 do not interfere with each other, and the structure is compact, which helps to simplify the structural design and assembly process.

[0057] Please see Figure 5 , Figure 7 and Figure 9 In one embodiment, the limiting part 211 further includes a baffle 2113, which is disposed on the limiting plate 2111 and forms a limiting groove 2114 with the limiting plate 2111 and the connecting plate 2112. One end of the elastic member 220 is limited within the limiting groove 2114. It is understood that by forming the limiting groove 2114 with the baffle 2113, the limiting plate 2111, and the connecting plate 2112, one end of the elastic member 220 can be limited within the limiting groove 2114, preventing the elastic member 220 from separating from the limiting plate 2111. This improves the stability of the contact between the limiting plate 2111 and the elastic member 220, thus improving the reliability of the flow limiting device 10. Furthermore, the baffle 2113 also increases the weight of the side of the limiting plate 2111 that abuts against the elastic member 220, which helps to increase the first force of closing the outlet 120.

[0058] In one embodiment, a first positioning part 150 is provided on the outer peripheral wall of the housing 100. One end of the elastic member 220 is positioned in conjunction with the first positioning part 150. A second positioning part 2115 is provided on the side of the limiting plate 2111 facing the housing 100, and the other end of the elastic member 220 is positioned in conjunction with the second positioning part 2115. It can be understood that the first positioning part 150 and the second positioning part 2115 can both be columnar, or hole-shaped, or partly columnar and partly hole-shaped. The specific shape is not limited here, as long as it can be positioned and cooperated with the elastic member 220. In this solution, the elastic member 220 is a spring. The first positioning part 150 includes a first positioning post, and the second positioning part 2115 includes a second positioning post. One end of the spring is sleeved on the first positioning post, and the other end of the spring is sleeved on the second positioning post. This allows for stable installation of the spring, which not only improves the stability of the spring installation but also simplifies the structure of the current limiting device 10.

[0059] Please see Figure 6 and Figure 7 In one embodiment, the inner wall of the water passage 110 is provided with a buffer surface 111. The buffer surface 111 extends along the water inlet direction of the water passage 110 and is inclined towards the outlet 120. It is understood that the buffer surface 111 can be a plane or an arc surface; no specific limitation is made here. By providing the buffer surface 111 within the water passage 110, the turbulence within the water passage 110 and the impact on the flow limiting component 210 can be reduced, thus extending the service life of the flow limiting component 200.

[0060] In one embodiment, the housing 100 includes a housing body 160 and a buffer enclosure 170. The buffer enclosure 170 is disposed at one end of the housing body 160 near the outlet 120 and encloses the housing body 160 to form the water passage 110. The inner wall of the buffer enclosure 170 is provided with a buffer surface 111. An avoidance space 180 is formed between the outer wall of the buffer enclosure 170 and the housing body 160. Part of the flow limiting component 200 is disposed within the avoidance space 180.

[0061] It is understood that the specific structure of the buffer enclosure 170 is not limited, and it can be formed by one, two, or a combination of multiple enclosures. The inner wall of the buffer enclosure 170 is provided with a buffer surface 111, and the outer wall of the buffer enclosure 170 forms a clearance space 180. The buffer enclosure 170 has a high structural utilization rate. Some of the flow limiting components 200 are located in the clearance space 180, which makes the structure of the flow limiting device 10 compact and is conducive to the miniaturization of the flow limiting device 10.

[0062] Please see Figures 6 to 8 In one embodiment, the buffer enclosure 170 includes a buffer plate 171 and a guide plate 172. The buffer plate 171 is provided with the buffer surface 111. The guide plate 172 is disposed at one end of the buffer plate 171 near the outlet 120. The guide plate 172 and the shell body 160 enclose each other to form the outlet 120. The guide plate 172 extends along the water inlet direction of the water passage 110. And / or, the shell 100 has an inlet 130 communicating with the water passage 110. The opening area of ​​the inlet 130 is larger than the opening area of ​​the outlet 120.

[0063] Understandably, the guide plate 172 extends along the water inlet direction of the water passage 110, enabling it to guide the water flow within the passage 110 and improve its smoothness. Furthermore, the opening area of ​​the inlet 130 of the housing 100 is larger than that of the outlet 120, which reduces turbulence within the water passage 110 and the impact on the flow restrictor 210, thus extending the service life of the flow restrictor assembly 200.

[0064] In one embodiment, the buffer surface 111 extends along the water inlet direction of the water passage 110 and is inclined towards the outlet 120. It is understood that the buffer surface 111 can be a flat surface or an arc surface; no specific limitation is made here. By providing the buffer surface 111 within the water passage 110, the turbulence within the water passage 110 and the impact on the flow restrictor 210 can be reduced, thus extending the service life of the flow restrictor assembly 200.

[0065] In one embodiment, the buffer plate 171 is provided with a first positioning part 150, the elastic member 220 is disposed in the clearance space 180 and one end is positioned in cooperation with the first positioning part 150, the flow limiting member 210 is provided with a second positioning part 2115, and the other end of the elastic member 220 is positioned in cooperation with the second positioning part 2115.

[0066] It is understandable that a first positioning part 150 is provided on the outer wall of the buffer plate 171 within the clearance space 180, and an elastic element 220 is located within the clearance space 180 with one end positioned and installed with the first positioning part 150. This not only simplifies the assembly process but also makes the structure of the current limiting device 10 compact and space-efficient. Both the first positioning part 150 and the second positioning part 2115 can be columnar, perforated, or partially columnar and partially perforated; the specific form is not limited here, as long as they can be positioned and engaged with the elastic element 220. In this solution, the elastic element 220 is a spring, the first positioning part 150 includes a first positioning post, and the second positioning part 2115 includes a second positioning post. One end of the spring is sleeved on the first positioning post, and the other end of the spring is sleeved on the second positioning post. This simplifies the assembly process of the current limiting component 200 and improves the stability of the spring installation.

[0067] Please see Figures 1 to 3 The present invention also proposes a water tank assembly 20, which includes a flow limiting device 10 as described above. The specific structure of the flow limiting device 10 is as described in the above embodiments. Since the water tank assembly 20 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0068] In one embodiment, the housing 21 has a receiving cavity 22 and a water inlet communicating with the receiving cavity 22. The housing 100 of the flow limiting device 10 is disposed on the housing 21 and located at the water inlet. The water outlet 120 of the housing 100 is communicating with the receiving cavity 22. Understandably, when there is no water or the water flow is small in the water flow channel, the first force provided by the elastic element 220 to the flow limiting element 210 causes the flow limiting element 210 to continuously close the outlet 120. When the water flow in the water flow channel is large, the water pressure pushes the flow limiting element 210 to rotate, causing the flow limiting element 210 to open the outlet 120. Because the elastic element 220 continuously provides the first force to the flow limiting element 210 to close the outlet 120, when the water pressure disappears, the flow limiting element 210 will continue to close the outlet 120, and the water in the receiving cavity 22 cannot generate the force to make the flow limiting element 210 rotate and open the outlet 120, so that the water in the tank 21 cannot overflow from the outlet 120, thereby realizing the function of one-way water supply.

[0069] In one embodiment, the water inlet is located at the top of the tank 21, and the water passage 110 extends downwards within the water tank assembly 20. This arrangement ensures that the flow-limiting device 10 is vertically installed at the water inlet, and the water passage 110 extends downwards, allowing water flowing into the water passage 110 to flow downwards into the tank 21 under gravity.

[0070] In one embodiment, the density of the flow restrictor 210 is less than that of water; for example, the flow restrictor 210 is made of plastic material.

[0071] In one embodiment, the outlet 120 of the housing 100 and / or the flow restrictor 210 are disposed within the receiving cavity 22 and positioned below the top wall of the receiving cavity 22 at the water inlet. This arrangement ensures that the flow restrictor 210 is positioned below the top wall of the receiving cavity 22 at the water inlet, i.e., the flow restrictor 210 is spaced apart from the top wall of the receiving cavity 22. When the water level in the receiving cavity 22 is higher than the flow restrictor 210, the flow restrictor 210 will close the outlet 120 under the combined action of the buoyancy of the water and the first force exerted by the elastic member 220, preventing water from overflowing from the water inlet when the water flow in the tank is unstable or when there is excessive foam. The elastic member 220 is compressed on the housing 100, providing the flow restrictor 210 with a continuous first force to close the outlet 120.

[0072] Please see Figure 3 and Figure 4 In one embodiment, the flow-limiting component 200 further includes a sealing element 300, which is disposed at the water inlet to seal the gap between the housing 100 and the tank 21. This arrangement prevents water from flowing out from the gap between the housing 100 and the tank 21, improving the reliability of the water tank assembly 20. To facilitate the installation of the sealing element 300, an annular mounting groove is provided on the outer peripheral wall of the housing 100. The sealing element 300 is annularly arranged and disposed within the annular mounting groove, abutting against the groove wall and the wall of the water inlet to seal the gap between the housing 100 and the tank 21.

[0073] In one embodiment, one of the housing 21 and the shell 100 is provided with a positioning part, and the other is provided with a mating part adapted to the positioning part. The shell 100 is positioned and installed on the housing 21 through the positioning part. This arrangement allows the shell 100 to be quickly and stably installed on the housing 21. One of the positioning part and the mating part can be a snap-fit ​​groove, and the other can be a snap-fit ​​post. The snap-fit ​​post is engaged in the snap-fit ​​groove to achieve the positioning and installation of the shell 100 and the housing 21.

[0074] This utility model also proposes a cleaning machine, which includes the water tank assembly 20 as described above. The specific structure of the water tank assembly 20 is as described in the above embodiments. Since this cleaning machine adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0075] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A current limiting device, characterized in that, include: The housing has a water passage and a water outlet communicating with the water passage; A flow-limiting component includes a flow-limiting element and an elastic element, wherein the flow-limiting element is rotatably disposed at the water outlet to open or close the water outlet; The elastic element is disposed on the housing and provides a first force to the flow restrictor to continuously close the outlet, thereby restricting the water flow from the water passage to the outlet in a one-way direction; the flow restrictor is used to open the outlet when the second force of the water flow in the water passage on the flow restrictor is greater than the first force.

2. The current limiting device as described in claim 1, characterized in that, The flow limiting component includes a limiting part and a flow limiting plate disposed on the limiting part. The limiting part is rotatably disposed on the housing and abuts against the elastic member, so that the elastic member is in a compressed state and provides the first force to the flow limiting component. The flow limiting plate is located at the water outlet and can rotate with the rotation of the limiting part.

3. The current limiting device as described in claim 2, characterized in that, The limiting part includes a limiting plate, which is disposed on one side of the flow limiting plate and abuts against the elastic member. When the flow limiting member closes the water outlet, the projection of the water outlet falls on the flow limiting plate along the water inlet direction of the water passage, and at least part of the projection of the elastic member falls on the limiting plate.

4. The current limiting device as described in claim 3, characterized in that, The flow limiting component also includes a rotating column. The outer wall of the housing is provided with a mounting hole. The rotating column is rotatably disposed in the mounting hole. The rotating column is disposed on the same side of the flow limiting plate and the limiting plate facing the housing.

5. The current limiting device as described in claim 4, characterized in that, The limiting part further includes a connecting plate, one end of which is connected to the rotating column, and the other end of which is connected to the flow limiting plate and the limiting plate. The flow limiting plate and the limiting plate are located on opposite sides of the connecting plate, and the elastic element is provided on the limiting plate.

6. The current limiting device as described in claim 5, characterized in that, The limiting part further includes a baffle, which is disposed on the limiting plate and forms a limiting groove with the limiting plate and the connecting plate, and one end of the elastic member is limited to the limiting groove; And / or, a first positioning part is provided on the outer peripheral wall of the housing, one end of the elastic member is positioned in cooperation with the first positioning part, a second positioning part is provided on the side of the limiting plate facing the housing, and the other end of the elastic member is positioned in cooperation with the second positioning part.

7. The current limiting device according to any one of claims 1 to 6, characterized in that, The shell includes a shell body and a buffer enclosure. The buffer enclosure is located at one end of the shell body near the outlet and encloses the shell body to form the water passage. The inner wall of the buffer enclosure has a buffer surface, and an avoidance space is formed between the outer wall of the buffer enclosure and the shell body. Part of the flow limiting component is located in the avoidance space.

8. The current limiting device as described in claim 7, characterized in that, The buffer enclosure includes a buffer plate and a guide plate. The buffer plate is provided with a buffer surface, and the guide plate is located at one end of the buffer plate near the water outlet. The guide plate and the shell body enclose the water outlet. The guide plate extends along the water inlet direction of the water passage. And / or, the housing has a water inlet communicating with the water passage, and the opening area of ​​the water inlet is larger than the opening area of ​​the water outlet; And / or, the buffer surface extends along the water inlet direction of the water passage and is inclined toward the outlet.

9. The current limiting device as described in claim 8, characterized in that, The buffer plate is provided with a first positioning part, the elastic element is disposed in the clearance space and one end of it is positioned in cooperation with the first positioning part, the flow limiting element is provided with a second positioning part, and the other end of the elastic element is positioned in cooperation with the second positioning part.

10. A water tank assembly, characterized in that, include: The housing has a receiving cavity and a water inlet communicating with the receiving cavity; as well as The flow limiting device according to any one of claims 1 to 9, wherein the housing is disposed on the box and located at the water inlet, and the water outlet of the housing is in communication with the receiving cavity.

11. The water tank assembly as claimed in claim 10, characterized in that, The outlet of the housing and / or the flow restrictor are located inside the receiving cavity and are positioned below the top wall of the receiving cavity at the inlet. And / or, the flow limiting component further includes a seal disposed at the water inlet to seal the gap between the housing and the box body; And / or, one of the housing and the box body is provided with a positioning part, and the other is provided with a mating part adapted to the positioning part, and the housing is positioned and installed with the box body through the positioning part; And / or, the water inlet is located at the top of the tank body, and the water passage extends in the water tank assembly in a top-to-bottom direction.

12. A cleaning machine, characterized in that, Includes the water tank assembly as described in claim 10 or 11.

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