Flow limiting assembly, water tank assembly and cleaning machine

Abstract

The utility model discloses a flow limiting assembly, a water tank assembly and a cleaning machine. The flow limiting assembly comprises a shell and a flow limiting part, the shell is provided with a water inlet, a water outlet and a water passing channel communicated with the water inlet and the water outlet, at least part of the flow limiting part is arranged in the water passing channel, the flow limiting part is provided with a water passing hole, the water inlet is communicated with the outer space of the water outlet through the water passing hole, and the water inlet is communicated with the outer space of the water outlet through the water passing hole. A flow limiting groove with an opening facing the water outlet is formed between the outer wall of the flow limiting piece and the inner wall of the shell, and the flow limiting piece is suitable for being elastically deformed under the action of water pressure so that the water passing area of the water passing hole and the opening area of the flow limiting groove can be adjusted and change in a negative correlation mode. The flow limiting piece is used for limiting water flow outside the water outlet to flow towards the water inlet. The flow limiting assembly can supply water in a one-way mode, 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 component, a water tank component, 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 invention is to provide a flow limiting component, a water tank component, and a cleaning machine. The flow limiting component is capable of unidirectional water supply, 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 an inlet, an outlet, and a water passage connecting the inlet and the outlet;

[0006] A flow restrictor, at least a portion of which is disposed within the water passage, has a water passage hole that connects the external space of the inlet and the outlet. A flow restrictor groove with an opening facing the outlet is formed between the outer wall of the flow restrictor and the inner wall of the housing. The flow restrictor is adapted to undergo elastic deformation under water pressure so that the water passage area of ​​the water passage hole and the opening area of ​​the flow restrictor groove are adjustable and negatively correlated. The flow restrictor is used to limit the flow of water outside the outlet towards the inlet.

[0007] In one embodiment, the flow restrictor includes a first segment having a first channel and a second segment having a second channel. The second channel is located downstream of the first channel and communicates with the first channel to form the water passage. The first segment is connected to the housing. The flow restrictor groove is formed between the outer wall of the second segment and the inner wall of the housing. The second segment is elastic. Along the water inlet direction of the water passage, the water passage area of ​​the second channel gradually decreases, and the cross-sectional area of ​​the flow restrictor groove gradually increases.

[0008] In one embodiment, the flow restrictor further includes a third segment having a third channel, the third channel being located downstream of and communicating with the second channel, the outer walls of the second segment and the third segment forming the flow restrictor groove between the inner wall of the housing, the third segment being elastic, and the water-passing area of ​​the third channel being smaller than the water-passing area of ​​the first channel.

[0009] In one embodiment, the third channel is provided as a straight hole with a uniform cross-section; the third section is disposed within the water passage and is located near the water outlet;

[0010] Alternatively, a portion of the third section may be located within the water passage, while another portion of the third section may extend from the outlet to outside the water passage.

[0011] In one embodiment, the first segment is provided with a mounting part, the water passage is provided with a supporting part, and the mounting part is disposed on the supporting part;

[0012] And / or, the outer wall of the first segment is sealed to the inner wall of the water passage.

[0013] In one embodiment, the inner wall of the water passage is provided with a buffer surface, and the second segment has a buffer portion adapted to the buffer surface. The buffer portion is supported on the buffer surface, and the buffer surface extends along the water inlet direction of the water passage and is inclined towards the inside of the second passage.

[0014] In one embodiment, the housing includes a housing body and a buffer plate, the housing body and the buffer plate enclosing to form the water passage, the buffer plate having a buffer surface on its inner wall, and the buffer plate and the buffer portion extending along the water inlet direction of the water passage and inclined towards the second channel.

[0015] And / or, the buffer surface is a plane that extends obliquely into the second channel.

[0016] In one embodiment, the housing includes a main body, a buffer plate, and a flow limiting plate. The flow limiting plate is disposed on the side of the buffer plate near the outlet and connected to the main body. The main body, the buffer plate, and the flow limiting plate enclose the water passage. A portion of the second segment and at least a portion of the third segment are disposed within the passage formed by the main body and the flow limiting plate. The flow limiting plate is disposed near the central axis of the first passage.

[0017] In one embodiment, the second segment includes a buffer arc portion, and the second segment is connected to the third segment through the buffer arc portion. Along the water inlet direction of the water passage, the distance between the inner wall surface of the buffer arc portion and the central axis of the third passage gradually decreases, while the distance between the outer wall surface of the buffer arc portion and the inner wall surface of the passage formed by the shell body and the flow limiting plate gradually increases.

[0018] In one embodiment, the second segment has a buffer portion adapted to the buffer plate, the buffer plate and the buffer portion extending along the water inlet direction of the water passage and inclined towards the second passage; the second segment further includes a flow guide portion, the buffer portion, the flow guide portion and the buffer arc portion are connected in sequence, and the flow guide portion extends along the direction from the water inlet toward the water outlet.

[0019] This utility model also proposes a water tank assembly, which includes a tank body and a flow limiting component as described above. The housing is disposed on the tank body and located at the water inlet, and the water outlet of the housing is connected to the receiving cavity.

[0020] In one embodiment, the outlet of the housing and / or the flow-limiting groove are located inside the receiving cavity and are positioned below the top wall of the receiving cavity at the inlet hole;

[0021] 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;

[0022] 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;

[0023] 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.

[0024] This utility model also proposes a cleaning machine, which includes the water tank assembly described above.

[0025] The flow-limiting component of this utility model includes a housing and a flow-limiting element. The housing has an inlet, an outlet, and a water passage connecting the inlet and outlet. At least part of the flow-limiting element is disposed in the water passage. A flow-limiting groove with an opening facing the outlet is formed between the outer wall of the flow-limiting element and the inner wall of the housing. The flow-limiting element is adapted to undergo elastic deformation under water pressure so that the water passage area of ​​the water passage hole and the opening area of ​​the flow-limiting groove are adjustable and change negatively correlated. The flow-limiting element is used to restrict the flow of water outside the outlet from flowing towards the inlet. With this configuration, the flow-limiting component of this solution does not involve electrical components. Only by placing the flow-limiting element inside the housing can unidirectional water supply be achieved. When water flows into the water passage from the inlet, it passes through the water hole. The water in the water hole squeezes the flow-limiting component from the inside out, causing the water hole to open and increasing its flow area. This reduces the opening area of ​​the flow-limiting groove, allowing the water to flow out through the water hole and exit through the outlet of the shell. When water from outside the shell flows back into the shell from the outlet, it flows into the flow-limiting groove and squeezes the outer wall of the flow-limiting component, causing it to elastically deform and shrink. Simultaneously, the water hole shrinks, increasing the opening area of ​​the flow-limiting groove and decreasing the flow area of ​​the water hole, until the water hole closes, preventing water from flowing back into the shell from the outlet. The flow-limiting component is applied to the water tank assembly, preventing water inside the tank from overflowing from the inlet. Therefore, this invention provides a simple flow-limiting component capable of unidirectional water supply. This component does not involve electrical components, has a simple structure, and low manufacturing cost. Attached Figure Description

[0026] 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.

[0027] Figure 1 A schematic diagram of the structure of an embodiment of the water tank assembly provided by this utility model;

[0028] Figure 2 for Figure 1 A sectional view of the structure in the middle;

[0029] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0030] Figure 4 A schematic diagram of the structure of an embodiment of the current limiting component provided by this utility model;

[0031] Figure 5 for Figure 4 A schematic diagram of the decomposed structure in the image;

[0032] Figure 6 for Figure 4 A sectional view of the structure in the middle;

[0033] Figure 7 for Figure 4 A cross-sectional view of the structure from another perspective;

[0034] Figure 8 for Figure 5 A schematic diagram of the shell structure in the middle;

[0035] Figure 9 for Figure 8 A sectional view of the structure in the middle;

[0036] Figure 10 for Figure 5 A schematic diagram of the current-limiting component in the middle;

[0037] Figure 11 for Figure 10 A sectional view of the structure in the middle;

[0038] Figure 12 for Figure 10 A cross-sectional view of the structure from another perspective.

[0039] Explanation of icon numbers:

[0040] 10. Current limiting component;

[0041] 100. Shell; 110. Inlet; 120. Outlet; 130. Water passage; 140. Supporting part; 150. Buffer surface; 160. Shell body; 170. Buffer plate; 180. Flow limiting plate;

[0042] 200. Flow limiting component; 210. Water passage hole; 220. Flow limiting groove; 230. First section; 231. Mounting part; 240. Second section; 241. Buffer part; 242. Buffer arc part; 243. Flow guide part; 250. Third section;

[0043] 300. Seals;

[0044] 20. Water tank assembly; 21. Tank body; 22. Receiving cavity.

[0045] 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

[0046] 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.

[0047] 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.

[0048] 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.

[0049] This utility model proposes a flow limiting component, a water tank assembly including the flow limiting component, and a cleaning machine including the water tank assembly.

[0050] Please see Figures 4 to 7In one embodiment of this utility model, the flow limiting component 10 includes a housing 100 and a flow limiting element 200. The housing 100 has an inlet 110, an outlet 120, and a water passage 130 connecting the inlet 110 and the outlet 120. At least a portion of the flow limiting element 200 is disposed within the water passage 130. The flow limiting element 200 has a water passage hole 210, which connects the inlet 110 and the outlet 120. The external space is connected, and a flow-limiting groove 220 with an opening facing the outlet 120 is formed between the outer wall of the flow-limiting member 200 and the inner wall of the housing 100. The flow-limiting member 200 is adapted to undergo elastic deformation under water pressure so that the water passage area of ​​the water passage hole 210 and the opening area of ​​the flow-limiting groove 220 are adjustable and change negatively correlated. The flow-limiting member 200 is used to restrict the flow of water outside the outlet 120 towards the inlet 110.

[0051] It is understood that the flow-limiting component 10 is used for unidirectional water supply. The flow-limiting component 10 can be applied not only to cleaning machines but also to other equipment requiring unidirectional water supply; this is not limited to these applications. In this solution, the flow-limiting component 10 is applied to the water tank assembly 20. The flow-limiting component 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, preventing water in the tank body 21 from overflowing from the water inlet. The flow-limiting component 200 is used to restrict the flow of water outside the outlet 120 towards the inlet 110. That is, the flow-limiting component 200 can restrict water outside the housing 100 from flowing back into the housing 100 from the outlet 120, thereby improving the unidirectional water supply capability of the flow-limiting component 200.

[0052] Furthermore, the shape of the housing 100 is not limited; for example, the housing 100 can be cylindrical or square. The flow restrictor 200 can be entirely located within the water passage 130, or partially located within the water passage 130 with the other part located outside the water passage 130. It is sufficient that a flow restrictor groove 220 with an opening facing the outlet 120 is formed between the outer wall of the flow restrictor 200 and the inner wall of the housing 100. The flow restrictor 200 can undergo elastic deformation under water pressure. The flow restrictor 200 can be made of an elastic material, such as silicone or vapor phase adhesive, etc., and the specific material is not limited here. When the flow restrictor 200 undergoes elastic deformation, the water passage area of ​​the water passage hole 210 and the opening area of ​​the flow restrictor 220 change. If the water passage area of ​​the water passage hole 210 increases, the opening area of ​​the flow restrictor 220 decreases, that is, the water passage hole 210 is expanded. At this time, the water flows from the water passage channel 130 toward the outlet 120. If the opening area of ​​the flow restrictor 220 increases, the water passage area of ​​the water passage hole 210 decreases until the water passage hole 210 closes, that is, the water passage hole 210 is reduced. At this time, the water outside the outlet 120 cannot flow through the water passage hole 210 into the housing 100, so as to realize the function of unidirectional water supply of the flow restrictor 10.

[0053] The flow limiting component 10 of this utility model includes a housing 100 and a flow limiting element 200. The housing 100 has an inlet 110, an outlet 120, and a water passage 130 connecting the inlet 110 and the outlet 120. At least part of the flow limiting element 200 is disposed in the water passage 130. A flow limiting groove 220 with an opening facing the outlet 120 is formed between the outer wall of the flow limiting element 200 and the inner wall of the housing 100. The flow limiting element 200 is adapted to undergo elastic deformation under water pressure so that the water passage area of ​​the water passage hole 210 and the opening area of ​​the flow limiting groove 220 are adjustable and change negatively correlated. The flow limiting element 200 is used to restrict the water flow outside the outlet 120 from flowing towards the inlet 110. With this configuration, the flow limiting component 10 of this solution does not involve electrical components. Only by placing the flow limiting element 200 in the housing 100, unidirectional water supply can be achieved. When water flows into the water passage 130 from the inlet 110, the water flows through the water hole 210. The water in the water hole 210 squeezes the flow restrictor 200 from the inside out, causing the water hole 210 to open. This increases the water passage area of ​​the water hole 210 and decreases the opening area of ​​the flow restrictor 220. The water then flows through the water hole 210 and is discharged out of the outlet 120 of the housing 100. When water outside the housing 100 flows back into the housing 100 from the outlet 120, the water at the outlet 120 flows into... The flow-limiting groove 220 compresses the outer wall of the flow-limiting component 200, causing the flow-limiting component 200 to elastically deform and shrink. Simultaneously, the water passage hole 210 shrinks, meaning the opening area of ​​the flow-limiting groove 220 increases and the water passage area of ​​the water passage hole 210 decreases until the water passage hole 210 closes. This prevents water outside the housing 100 from flowing back into the housing 100 from the outlet 120. The flow-limiting component 10 is applied to the water tank assembly 20, preventing water inside the tank 21 from overflowing from the inlet hole of the tank 21. Therefore, this invention provides a simple flow-limiting component 10 capable of unidirectional water supply. This component 10 does not involve electrical components, has a simple structure, and low manufacturing cost.

[0054] Please see Figures 5 to 7 In one embodiment, the flow restrictor 200 includes a first segment 230 having a first channel and a second segment 240 having a second channel. The second channel is located downstream of the first channel and communicates with the first channel to form the water passage 210. The first segment 230 is connected to the housing 100. The flow restrictor 220 is formed between the outer wall of the second segment 240 and the inner wall of the housing 100. The second segment 240 is elastic. Along the water inlet direction of the water passage 130, the water passage area of ​​the second channel gradually decreases, and the cross-sectional area of ​​the flow restrictor 220 gradually increases.

[0055] Understandably, the second segment 240 is elastic, allowing it to deform elastically under water pressure, thereby adjusting the size of the second channel and the size of the flow-limiting groove 220. Along the water inlet direction of the water passage 130, the water passage area of ​​the second channel gradually decreases, or it could decrease in a step-like manner. Similarly, the cross-sectional area of ​​the flow-limiting groove 220 gradually increases, or it could increase in a step-like manner.

[0056] The water-passing area of ​​the second channel gradually decreases, while the cross-sectional area of ​​the flow-limiting groove 220 gradually increases. These two trends are opposite, exhibiting a strong negative correlation and significant changes, which facilitates unidirectional water flow. The second section 240 is funnel-shaped. When water flows from the inlet 110 into the water-passing channel 130, the water in the second channel accumulates and easily expands the second section 240, allowing the water to flow smoothly outward from the outlet 120. When water flows back into the housing 100 from the outlet 120, the water easily flows into the flow-limiting groove 220 and squeezes the outer wall of the second section 240, causing the second section 240 to deform and close the second channel, thus ensuring the unidirectional water supply function of the flow-limiting component 10.

[0057] Please see Figures 5 to 7 In one embodiment, the flow restrictor 200 further includes a third segment 250 having a third channel. The third channel is located downstream of and communicates with the second channel. The outer walls of the second segment 240 and the third segment 250 form the flow restricting groove 220 between them and the inner wall of the housing 100. The third segment 250 is elastic, and the water-passing area of ​​the third channel is smaller than that of the first channel. This configuration increases the length of the flow restrictor 200 and the depth of the flow restricting groove 220, thus increasing its volume. This makes it easier for the water passage hole 210 to shrink and its water-passing area to decrease when water pressure squeezes the outer wall of the flow restrictor 200, until the water passage hole 210 closes. This restricts water outside the housing 100 from flowing back into the housing 100 from the outlet 120. This solution improves the elastic deformation capability of the flow restrictor 200 and the reliability of unidirectional water supply.

[0058] In one embodiment, the third channel is a straight hole with a uniform cross-section; the third segment 250 is disposed within the water passage 130 and close to the outlet 120; or, a portion of the third segment 250 is disposed within the water passage 130, and another portion of the third segment 250 extends from the outlet 120 to the outside of the water passage 130.

[0059] Understandably, the third channel is designed as a straight hole with a uniform cross-section. This not only makes the third section 250 easier to process and shape, but also facilitates the simultaneous reverse adjustment of the water flow area of ​​the water passage 210 and the opening area of ​​the flow-limiting groove 220 by the water pressure acting on the third section 250. The third section 250 is positioned close to the outlet 120, which also makes the flow-limiting groove 220 close to the outlet 120. Water at the outlet 120 can quickly flow into the flow-limiting groove 220 and squeeze the third section 250, thereby quickly closing the water passage 210 and preventing water outside the housing 100 from flowing back into the housing 100 from the outlet 120. This helps improve the reliability of the flow-limiting component 10. In addition, a portion of the third section 250 extends from the outlet 120 to outside the water passage 130, further increasing the speed at which water at the outlet 120 squeezes the third section 250, which further improves the reliability of the unidirectional water supply of the flow-limiting component 10.

[0060] Please see Figure 5 and Figure 6 In one embodiment, the first segment 230 is provided with a mounting portion 231, and the water passage 130 is provided with a supporting portion 140, with the mounting portion 231 disposed on the supporting portion 140. This arrangement ensures that the flow restrictor 200 can be stably installed within the water passage 130. The mounting portion 231 can be a mounting platform, and the supporting portion 140 can be a supporting platform, with the mounting platform resting on the supporting platform, ensuring the stability of the flow restrictor 200 within the housing 100.

[0061] In one embodiment, the outer wall of the first segment 230 and the inner wall of the water passage 130 are sealed together, thus preventing leakage of the flow limiting component 10 and improving its stability. The first segment 230 can be sealed by adding a sealing ring, by applying sealant, or by using its own elasticity to achieve a seal; the specific method is not limited here.

[0062] Please see Figure 6 , Figure 9 and Figure 11 In one embodiment, the inner wall of the water passage 130 is provided with a buffer surface 150, and the second segment 240 has a buffer part 241 adapted to the buffer surface 150. The buffer part 241 is supported on the buffer surface 150, and the buffer surface 150 extends along the water inlet direction of the water passage 130 and is inclined towards the inside of the second channel.

[0063] It is understood that the buffer surface 150 can be a flat surface or a curved surface, and the specific design is not limited here. By setting the buffer surface 150 in the water passage 130 and setting the buffer part 241 on the second section 240, the buffer surface 150 is inclined towards the second channel, which can reduce the turbulence in the water passage 130 and the impact on the flow restrictor 200, and extend the service life of the flow restrictor 200.

[0064] Please see Figures 6 to 11 In one embodiment, the housing 100 includes a housing body 160 and a buffer plate 170. The housing body 160 and the buffer plate 170 enclose the water passage 130. The buffer plate 170 has a buffer surface 150 on its inner wall. The buffer plate 170 and the buffer portion 241 extend along the water inlet direction of the water passage 130 and are inclined towards the second channel. This arrangement, where the buffer plate 170 and the buffer portion 241 extend in the same inclination direction, allows the buffer portion 241 to support and stably adhere to the buffer plate 170, thereby improving the buffering effect on the water flow and enhancing the stability of the flow restrictor 200 installation.

[0065] In one embodiment, the buffer surface 150 is a plane that extends obliquely into the second channel, which makes the buffer surface 150 easy to process and shape, and provides a good buffering effect for water flow.

[0066] Please see Figures 8 to 12 In one embodiment, the housing 100 includes a housing body 160, a buffer plate 170, and a flow limiting plate 180. The flow limiting plate 180 is disposed on the side of the buffer plate 170 near the outlet 120 and connected to the housing body 160. The housing body 160, the buffer plate 170, and the flow limiting plate 180 enclose the water passage 130. A portion of the second segment 240 and at least a portion of the third segment 250 are disposed within the passage enclosed by the housing body 160 and the flow limiting plate 180. The flow limiting plate 180 is disposed near the central axis of the first passage.

[0067] Understandably, the buffer plate 170 extends along the water inlet direction of the water passage 130 and is inclined towards the second channel. This can reduce the turbulence in the water passage 130 and the impact on the flow restrictor 200, thus extending the service life of the flow restrictor 200. The shell body 160 and the flow restrictor 180 enclose the outlet 120 of the shell 100. The flow restrictor 180 is set close to the central axis of the first channel, so that the opening area of ​​the inlet 110 is larger than the opening area of ​​the outlet 120. That is, the opening area of ​​the outlet 120 is smaller, and the third section 250 is more likely to undergo elastic deformation in the outlet 120, so that the opening area of ​​the flow restrictor 220 in the outlet 120 is easier to adjust. That is, when water flows back into the housing 100 from the outlet 120, because the outlet 120 is small, the water at the outlet 120 can quickly gather into the flow-limiting groove 220 and squeeze the third section 250, so as to quickly close the water passage 210 and prevent water outside the housing 100 from flowing back into the housing 100 from the outlet 120. This helps to improve the reliability of the flow-limiting component 10.

[0068] Please see Figure 6 , Figure 7 , Figures 10 to 12 In one embodiment, the second segment 240 includes a buffer arc portion 242, which connects the second segment 240 to the third segment 250. Along the water inlet direction of the water passage 130, the distance between the inner wall surface of the buffer arc portion 242 and the central axis of the third passage gradually decreases, while the distance between the outer wall surface of the buffer arc portion 242 and the inner wall surface of the passage formed by the shell body 160 and the flow limiting plate 180 gradually increases.

[0069] It is understandable that the buffer arc 242 can not only buffer water but also collect it. When water flows into the second channel from the water passage 130, the water accumulates in the buffer arc 242, which easily expands the second section 240, allowing the water to flow smoothly out of the outlet 120. Because the distance between the outer wall of the buffer arc 242 and the inner wall of the channel formed by the shell body 160 and the flow limiting plate 180 gradually increases, that is, the volume of the flow limiting groove 220 formed by the outer wall of the buffer arc 242 is large, when water flows back into the shell 100 from the outlet 120, the water easily flows into the flow limiting groove 220 and squeezes the outer wall of the buffer arc 242, causing the second section 240 to deform and close the water passage 210, thereby restricting the backflow of water from the outlet 120 into the shell 100. This solution improves the unidirectional water supply capability of the flow limiting component 200.

[0070] In one embodiment, the second segment 240 has a buffer portion 241 adapted to the buffer plate 170. The buffer plate 170 and the buffer portion 241 extend along the water inlet direction of the water passage 130 and are inclined towards the second channel. The second segment 240 also includes a guide portion 243. The buffer portion 241, the guide portion 243, and the buffer arc portion 242 are connected in sequence. The guide portion 243 extends along the water inlet 110 toward the water outlet 120. This arrangement allows the guide plate to guide the water flow within the water passage 210, thereby improving the smoothness of water flow.

[0071] In one embodiment, the flow-limiting groove 220 is arranged in a ring around the outer peripheral wall of the flow-limiting member 200. This arrangement ensures that when water outside the housing 100 flows back into the housing 100 from the outlet 120, the water flowing into the flow-limiting groove 220 can compress the circumferential wall of the flow-limiting member 200, thereby increasing the compression effect on the flow-limiting member 200. This makes the flow-limiting member 200 more prone to elastic deformation, reducing the size of the water passage 210 until the water passage 210 closes. This prevents water outside the housing 100 from flowing back into the housing 100 from the outlet 120, further improving the reliability of the unidirectional water supply of the flow-limiting component 10.

[0072] In one embodiment, the flow restrictor 200 is disposed at one end of the water passage 130 near the outlet 120 and extends outside the outlet 120. This arrangement allows water at the outlet 120 to quickly flow into the flow restrictor 220 and squeeze the flow restrictor 200, thereby increasing the speed at which water at the outlet 120 squeezes the flow restrictor 200, and thus improving the reliability of the unidirectional water supply of the flow restrictor assembly 10.

[0073] Please see Figures 1 to 3 The present invention also proposes a water tank assembly 20, which includes a flow limiting component 10 as described above. The specific structure of the flow limiting component 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.

[0074] 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 component 10 is disposed on the housing 21 and located at the water inlet. The water outlet 120 of the housing 100 communicates with the receiving cavity 22. It is understood that when water flows from the water inlet 110 of the housing 100 into the water passage 130, the water flows through the water hole 210. The water in the water hole 210 squeezes the flow limiting component 200 from the inside out, causing the water hole 210 to open, thus increasing the water passage area of ​​the water hole 210 and decreasing the opening area of ​​the flow limiting groove 220. The water flows through the water hole 210 and is discharged out of the water outlet 120 of the housing 100. When water outside the housing 100 flows back into the housing 100 from the water outlet 120, the water outlet 120... Water flows into the flow-limiting groove 220 at point 20 and squeezes the outer wall of the flow-limiting component 200, causing the flow-limiting component 200 to undergo elastic deformation and shrink. The water passage hole 210 shrinks simultaneously, that is, the opening area of ​​the flow-limiting groove 220 increases and the water passage area of ​​the water passage hole 210 decreases until the water passage hole 210 closes, so that water outside the shell 100 cannot flow back into the shell 100 from the outlet 120, that is, water in the tank 21 cannot overflow from the water inlet of the tank 21, thereby realizing the function of one-way water supply.

[0075] In one embodiment, the water inlet is located at the top of the tank 21, and the water passage 130 extends downward in the water tank assembly 20. With this configuration, the flow limiting component 10 is vertically installed at the water inlet, and the water passage 130 extends downward, allowing water flowing into the water passage 130 to flow downward into the tank 21 under the influence of gravity.

[0076] In one embodiment, the outlet 120 of the housing 100 and / or the flow-limiting groove 220 are disposed within the receiving cavity 22 and are positioned below the top wall of the receiving cavity 22 at the inlet. This arrangement ensures that the outlet 120 and the flow-limiting groove 220 of the housing 100 are positioned below the top wall of the receiving cavity 22 at the inlet, meaning the flow-limiting groove 220 is completely disposed within the receiving cavity 22 and spaced apart from the top wall of the receiving cavity 22. When the water level in the containment cavity 22 is higher than that in the flow-limiting groove 220, the water in the flow-limiting groove 220 will squeeze the outer wall of the flow-limiting component 200. That is, the outer wall of the flow-limiting component 200 will be subjected to a certain water pressure and undergo elastic deformation and shrink. The water passage hole 210 will shrink simultaneously. In other words, the opening area of ​​the flow-limiting groove 220 will increase and the water passage area of ​​the water passage hole 210 will decrease until the water passage hole 210 closes. The water in the containment cavity 22 will be sealed in the box 21 and will not be able to flow in the opposite direction along the water passage hole 210. This will prevent water from overflowing from the water inlet hole when the water flow in the box 21 is unstable or there is too much foam.

[0077] In one embodiment, the flow-limiting component 10 further includes a seal 300 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 seal 300, an annular mounting groove is provided on the outer peripheral wall of the housing 100. The seal 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.

[0078] 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.

[0079] 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.

[0080] 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 component, characterized in that, include: The housing has an inlet, an outlet, and a water passage connecting the inlet and the outlet; A flow restrictor, at least a portion of which is disposed within the water passage, has a water passage hole that connects the external space of the inlet and the outlet. A flow restrictor groove with an opening facing the outlet is formed between the outer wall of the flow restrictor and the inner wall of the housing. The flow restrictor is adapted to undergo elastic deformation under water pressure so that the water passage area of ​​the water passage hole and the opening area of ​​the flow restrictor groove are adjustable and negatively correlated. The flow restrictor is used to limit the flow of water outside the outlet towards the inlet.

2. The current limiting component as described in claim 1, characterized in that, The flow restrictor includes a first segment having a first channel and a second segment having a second channel. The second channel is located downstream of the first channel and communicates with the first channel to form the water passage. The first segment is connected to the housing. The flow restrictor groove is formed between the outer wall of the second segment and the inner wall of the housing. The second segment is elastic. Along the water inlet direction of the water passage, the water passage area of ​​the second channel gradually decreases, and the cross-sectional area of ​​the flow restrictor groove gradually increases.

3. The current limiting component as described in claim 2, characterized in that, The flow limiting component also includes a third segment having a third channel, which is located downstream of and communicates with the second channel. The flow limiting groove is formed between the outer walls of the second segment and the third segment and the inner wall of the housing. The third segment is elastic, and the water passage area of ​​the third channel is smaller than that of the first channel.

4. The current limiting component as described in claim 3, characterized in that, The third channel is a straight hole with a uniform cross-section; the third section is located inside the water passage and near the water outlet. Alternatively, a portion of the third section may be located within the water passage, while another portion of the third section may extend from the outlet to outside the water passage.

5. The current limiting component as described in claim 2, characterized in that, The first section is provided with an installation part, and the water passage is provided with a support part, with the installation part located on the support part; And / or, the outer wall of the first segment is sealed to the inner wall of the water passage.

6. The current limiting component as described in claim 2, characterized in that, The inner wall of the water passage is provided with a buffer surface, and the second section has a buffer part adapted to the buffer surface. The buffer part is supported on the buffer surface, and the buffer surface extends along the water inlet direction of the water passage and is inclined towards the inside of the second passage.

7. The current limiting component as described in claim 6, characterized in that, The shell includes a shell body and a buffer plate. The shell body and the buffer plate enclose the water passage to form the water passage. The buffer plate has a buffer surface on its inner wall. The buffer plate and the buffer part extend along the water inlet direction of the water passage and are inclined towards the second channel. And / or, the buffer surface is a plane that extends obliquely into the second channel.

8. The current limiting component as described in claim 3, characterized in that, The shell includes a shell body, a buffer plate, and a flow limiting plate. The flow limiting plate is located on the side of the buffer plate near the outlet and is connected to the shell body. The shell body, the buffer plate, and the flow limiting plate enclose the water passage. A portion of the second section and at least a portion of the third section are located within the passage formed by the shell body and the flow limiting plate. The flow limiting plate is located near the central axis of the first passage.

9. The current limiting component as described in claim 8, characterized in that, The second segment includes a buffer arc section, which connects the second segment to the third segment. Along the water inlet direction of the water passage, the distance between the inner wall of the buffer arc section and the central axis of the third channel gradually decreases, while the distance between the outer wall of the buffer arc section and the inner wall of the channel formed by the shell body and the flow limiting plate gradually increases.

10. The current limiting component as described in claim 9, characterized in that, The second segment has a buffer portion adapted to the buffer plate. The buffer plate and the buffer portion extend along the water inlet direction of the water passage and are inclined towards the second passage. The second segment also includes a flow guide portion. The buffer portion, the flow guide portion and the buffer arc portion are connected in sequence. The flow guide portion extends along the direction from the water inlet toward the water outlet.

11. 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 component as described in any one of claims 1 to 10, wherein the housing is disposed on the box body and located at the water inlet, and the water outlet of the housing is in communication with the receiving cavity.

12. The water tank assembly as claimed in claim 11, characterized in that, The outlet of the shell and / or the flow limiting groove are located in the receiving cavity and are positioned below the top wall of the receiving cavity at the inlet hole; 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.

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

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