A cleaning apparatus

Abstract

The application discloses a cleaning device, comprising a foam nozzle and a foam generating device connected to the foam nozzle, abandoning a traditional double-pump system and only adopting a single air pump to provide power, wherein the compressed air pressure generated by the air pump is used to control the opening of a one-way valve and the synchronous opening of a liquid passage, so that the liquid in a liquid storage cavity flows into a mixing cavity under the action of gravity, instant gas-liquid mixing and foaming are realized, when the air pump stops, the air pressure disappears, the one-way valve is automatically closed, and the liquid passage is closed. The application has the advantages that the two gas-liquid passages are synchronously controlled by a single air source, the structure of the foam generating device is greatly simplified, the cost is significantly reduced, and the working noise is smaller; and the opening and closing of the liquid passage are controlled by the pure mechanical structure of the one-way valve, and the reliability is high.

Description

Technical Field

[0001] This application relates to the field of cleaning equipment technology, and specifically to a cleaning device. Background Technology

[0002] In the field of cleaning equipment, especially intelligent cleaning equipment such as floor scrubbers and sweepers, a layer of foam containing detergent is usually sprayed or applied to the surface to be cleaned in order to improve the cleaning effect. This foam can prolong the contact time between the detergent and the stains, enhance the dissolving and encapsulating ability, and thus improve cleaning efficiency.

[0003] Currently, most foam generating devices widely used in the industry employ a "gas-liquid dual-pump mixing scheme." Its core components include an air pump that provides compressed air and a solution pump that quantitatively delivers the cleaning agent solution. The working principle is as follows: the solution pump pumps the liquid cleaning agent from the storage tank, while simultaneously, the compressed air output from the air pump mixes with the pumped solution in a specific mixing chamber to form foam, which is then sprayed out through nozzles.

[0004] Traditional "air-liquid dual-pump hybrid solution" requires two power components: an air pump and a solution pump. In particular, the cost of the high-precision micro solution pump accounts for a significant portion of the foam generator's cost, increasing the overall manufacturing cost. The dual-pump system and its associated piping and control circuits complicate the module structure, increasing the overall size and weight, which is detrimental to the miniaturization and lightweight design of portable devices such as floor scrubbers. The simultaneous operation of the air pump motor and solution pump motor results in relatively high total power consumption and cumulative operating noise, affecting the user experience. Coordinating the start-up, shutdown, power, or flow rate of the two pumps requires complex control procedures. Failure of any pump (such as solution pump blockage or air pump failure) will cause the entire foam generator function to fail, indicating that the system reliability needs to be improved.

[0005] Therefore, there is an urgent need for a foam generating device that is simple in structure, low in cost, easy to control, and more reliable, in order to overcome the many shortcomings of the existing "gas-liquid dual-pump mixing scheme". Summary of the Invention

[0006] This application provides a cleaning device to solve the problems of high cost, complex structure, cumbersome control, and poor reliability of existing foam generating devices.

[0007] This application provides a cleaning device, including a foam nozzle and a foam generating device connected to the foam nozzle, the foam generating device including a liquid storage chamber, an air pump, a mixing chamber, and a one-way valve.

[0008] The liquid storage chamber is used to store liquid and has a liquid outlet; the air pump is used to generate gas; the mixing chamber is used to mix the liquid and the gas to generate foam, and the mixing chamber is provided with a liquid inlet, an air inlet and a foam outlet, the liquid outlet is connected to the liquid inlet, and the air pump is connected to the air inlet and the mixing chamber; the one-way valve is provided in the mixing chamber and is used to control the opening and closing of the liquid inlet. When the one-way valve is open, the liquid in the liquid storage chamber can flow into the mixing chamber from the liquid inlet under the action of gravity; when the air pump is off, the one-way valve is in the closed state; when the air pump is on, the airflow generated by the air pump can drive the one-way valve to switch from the closed state to the open state.

[0009] Furthermore, the foam generating device also includes a housing, which comprises a first box and a second box; the liquid storage chamber is formed in the first box, and the mixing chamber is formed in the second box.

[0010] Furthermore, the first box body includes a top plate, and the top plate is provided with ventilation holes.

[0011] Furthermore, the first box body also includes a bottom plate and a partition plate disposed opposite to the top plate. The top end of the partition plate is fixedly connected to the lower surface of the top plate, and its bottom end extends toward the bottom plate, forming a notch between the partition plate and the bottom plate.

[0012] Furthermore, the one-way valve includes a fixed plate, a mounting shaft, and a baffle. The fixed plate is disposed inside the mixing chamber and is positioned opposite to the inner wall of the mixing chamber. One end of the mounting shaft is mounted to the inner wall of the mixing chamber, and the other end is mounted to the fixed plate. The upper end of the baffle is rotatably mounted to the mounting shaft.

[0013] Furthermore, the one-way valve also includes an elastic device, which is mounted to the mounting shaft to abut the baffle against the liquid inlet.

[0014] Furthermore, the baffle has a groove on the side facing the liquid outlet; the liquid inlet includes an elastic seal; when the air pump is turned off, a portion of the elastic seal protruding from the side wall of the second housing is located within the groove.

[0015] Furthermore, an air intake channel is provided inside the mixing chamber; there is a gap between the lower end of the baffle and the bottom surface of the air intake channel.

[0016] Furthermore, the elastic device is a torsion spring, including a helical spring body and two torsion arms; the helical spring body is sleeved on the mounting shaft, and the two torsion arms are respectively connected to the side wall of the second housing and the baffle; when the baffle is rotated, the torsion spring deforms and generates a reset torque.

[0017] Furthermore, one end of the air intake channel forms a wedge-shaped channel; along the airflow direction, the cross-sectional area of ​​the wedge-shaped channel gradually decreases.

[0018] Furthermore, the foam generating device also includes a cover plate, which is installed to the housing; the surface of the cover plate facing the bottom of the housing has a sloping protrusion that protrudes into the air inlet channel and is close to the foam outlet; a portion of the housing forms a sloping flat plate, which is disposed opposite to the sloping protrusion; the wedge-shaped channel is formed between the sloping flat plate and the sloping protrusion.

[0019] Furthermore, the foam generating device also includes a foaming net assembly, which includes a connecting pipe connected to the foam outlet.

[0020] This application provides a cleaning device, including a foam nozzle and a foam generating device connected to the foam nozzle. The foam generating device includes a liquid storage chamber, an air pump, a mixing chamber, and a one-way valve. By completely eliminating the solution pump and its associated control system, and retaining only a single air pump and using air pressure to control the liquid path, the number of parts is significantly reduced and the structure is greatly simplified. Using only a single air pump as the sole power source reduces total power consumption and significantly reduces equipment operating noise compared to a dual-pump solution, thus improving the user experience. The one-way valve, driven directly and instantly by air pressure, controls the opening and closing of the liquid path, achieving a millisecond-level response of "foam starts when air is on, foam stops when air is off," avoiding the start-stop delay of an electric pump, and making foam control more precise and efficient. The simplified structure frees up internal space and reduces overall weight, providing greater flexibility for the industrial design of portable equipment such as floor scrubbers. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in this embodiment, the accompanying drawings used in the description of the embodiment will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure of the foam generating device described in the embodiments of this application;

[0023] Figure 2 This is a partial structural schematic diagram of the foam generating device described in the embodiments of this application. Figure 1 ; Figure 3 This is a partial structural schematic diagram of the foam generating device described in the embodiments of this application. Figure 2 ; Figure 4 This is a schematic diagram of the through-hole of the foam generating device described in the embodiments of this application; Figure 5 This is a partial structural schematic diagram of the foam generating device described in the embodiments of this application. Figure 3 ; Figure 6 This is a schematic diagram of the elastic device of the foam generating apparatus described in the embodiments of this application; Figure 7 This is a schematic diagram of the baffle of the foam generating device described in the embodiments of this application; Figure 8 This is a cross-sectional schematic diagram of the air intake channel described in the embodiments of this application.

[0024] Explanation of reference numerals in the attached figures: 100 foam generating device; 110 Housing, 111 Liquid storage chamber, 112 Air pump, 113 Mixing chamber, 114 Check valve; 115 Foaming mesh assembly, 116 First box, 117 Second box, 118 Air inlet; 119 foam exports; 120 Side wall, 121 Through hole, 122 Air intake channel, 123 Connecting pipe, 124 Top plate; 125 Vent hole, 126 Base plate, 127 Partition, 128 Notch, 129 Main cavity; 130 Buffer chamber, 131 Fixed plate, 132 Mounting shaft, 133 Baffle, 134 Clearance; 135 Elastic device, 136 Helical spring body, 137 Torsion arm, 138 Groove; 139 Resilient Seal; 140 Wedge-shaped channel, 141 Cover plate, 142 sloping protrusion, 143 sloping flat plate; 200 foam nozzle. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, unless otherwise stated, directional terms such as "up," "down," "left," and "right" generally refer to up, down, left, and right in the actual use or working state of the device, specifically the drawing directions in the accompanying drawings.

[0026] like Figure 1As shown, this application provides a cleaning device (not shown), including a floor brush assembly (not shown) and a body (not shown). The body (not shown) is equipped with an air pump motor (not shown) and a foam generating device 100. The floor brush assembly (not shown) is equipped with a foam nozzle 200. The foam generating device 100 is connected to the foam nozzle 200 through a connecting pipe 123. The air pump motor (not shown) provides power to the air pump 112 inside the foam generating device 100. When the air pump 112 is started, the bubbles generated by the foam generating device 100 are delivered to the foam nozzle 200. The foam nozzle 200 sprays foam onto the surface to be cleaned, thereby improving the cleaning efficiency of the cleaning device (not shown).

[0027] Traditional foam generators have a dual-pump structure, including an air pump and a liquid pump. This dual-pump structure has high hardware costs, complex structure, cumbersome control, and poor reliability. In order to solve this technical problem, this application includes the following technical features.

[0028] like Figures 1-3 As shown, the foam generating device 100 includes a housing 110, a liquid storage chamber 111, an air pump 112, a mixing chamber 113, a one-way valve 114, and a foaming net assembly 115.

[0029] The housing 110 includes a first housing 116 and a second housing 117; a liquid storage chamber 111 is formed in the first housing 116, and a mixing chamber 113 is formed in the second housing 117; the liquid storage chamber 111 is used to store liquid and has a liquid outlet (not shown); an air pump 112 is used to generate gas; the mixing chamber 113 is used to mix the liquid and the gas to generate foam, and the mixing chamber 113 is provided with a liquid inlet (not shown), an air inlet 118, and a foam outlet 119, and the liquid outlet (not shown) is connected to the liquid inlet (not shown). The air pump 112 is connected to the air inlet 118 and communicates with the mixing chamber 113. The one-way valve 114 is located in the mixing chamber 113 and is used to control the opening and closing of the liquid inlet (not shown). When the one-way valve 114 is open, the liquid in the liquid storage chamber 111 can flow into the mixing chamber 113 from the liquid inlet (not shown) under the action of gravity. When the air pump 112 is closed, the one-way valve 114 is in the closed state. When the air pump 112 is open, the airflow generated by the air pump 112 can drive the one-way valve 114 to switch from the closed state to the open state.

[0030] like Figure 4As shown, in this embodiment, the first box 116 and the second box 117 are connected to each other and are an integral design. The first box 116 and the second box 117 include a common side wall 120, on which a through hole 121 is formed. The through hole 121 is both the liquid outlet of the liquid storage chamber 111 (not shown) and the liquid inlet of the mixing chamber 113 (not shown). When the one-way valve 114 is opened, the liquid in the liquid storage chamber 111 can flow into the mixing chamber 113 from the through hole 121 under the action of gravity.

[0031] In another embodiment, the first box 116 and the second box 117 are two separate boxes. The outlet of the liquid storage chamber 111 (not shown) and the inlet of the mixing chamber 113 (not shown) are connected by a hose (not shown). When the one-way valve 114 is opened, the liquid in the liquid storage chamber 111 flows into the hose (not shown) through the outlet (not shown). The liquid is then transported through the hose (not shown) to the inlet of the mixing chamber 113 (not shown) and flows into the mixing chamber 113.

[0032] In this embodiment, an air inlet channel 122 is provided in the mixing chamber 113. An air inlet 118 and a foam outlet 119 are respectively located at both ends of the air inlet channel 122. When the air pump 112 is started, the airflow generated by the air pump 112 can drive the one-way valve 114 from a closed state to an open state. Under the action of its own gravity, the liquid in the liquid storage chamber 111 flows out from the through hole 121 and drips into the mixing chamber 113. At this time, the gas generated by the air pump 112 synchronously blows the liquid towards the air inlet channel 122 near the foam outlet 119. At one end of 19, when liquid is blown toward the end of the air inlet channel 122 near the foam outlet 119, the liquid will violently collide, shear, and mix with the gas at that location to form a gas-liquid mixture and a small amount of foam. The gas-liquid mixture and the small amount of foam are transported to the foaming net assembly 115 through the connecting pipe 123 connected to the foam outlet 119. The foaming net assembly 115 makes the gas-liquid mixture form a large amount of dense foam. The foam is transported to the foam nozzle 200 and sprayed onto the surface to be cleaned by the foam nozzle 200.

[0033] The technological advantage lies in its innovative use of a single air pump and its control system, which completely eliminates the traditional solution pump and its control system. This innovative approach directly drives the opening and closing of the liquid circuit using air pressure, resulting in a significant simplification of the structure and a substantial reduction in cost (estimated to be over 50%). It also creates conditions for miniaturization and weight reduction of the entire machine. Using only a single air pump significantly reduces operating noise, improving the user experience. The foam generator 100 of this application achieves precise response—"foaming when air opens, foaming when air stops"—through millisecond-level real-time control of the liquid circuit opening and closing, with no delay and higher efficiency. The one-way valve 114 is a purely mechanical structure, without easily damaged motors or precision parts. It is resistant to crystallization and corrosion, not easily clogged or damaged, and easy to maintain and clean, greatly reducing long-term use and maintenance costs.

[0034] In order to achieve the goal of automatically flowing the liquid in the storage chamber into the mixing chamber and mixing it with the gas generated by the air pump when the air pump is started, without eliminating the solution pump and its control system, this application includes the following technical features.

[0035] like Figure 5 As shown, the first box body 116 includes a top plate 124, and the top plate 124 is provided with ventilation holes 125.

[0036] In this embodiment, the vent 125 maintains pressure balance between the inside of the liquid storage chamber 111 and the external atmospheric pressure. When the liquid flows out under gravity, external air can enter through the vent 125 in time to fill the local vacuum formed by the drop in liquid level, preventing negative pressure from hindering the smooth flow of liquid, thereby ensuring continuous and stable liquid supply. Without the vent 125, the liquid flow may cause an unexpected siphon effect due to pressure changes in the confined space, resulting in uncontrolled liquid flow or a flow rate that is initially fast and then slows down. By balancing the internal and external air pressure of the liquid storage chamber 111, the vent 125 ensures that the liquid flow is entirely driven by gravity and controlled by the rotation of the one-way valve 114, achieving uniform and controllable liquid supply from the foam generator 100.

[0037] like Figures 2-3 As shown, the first box 116 includes a bottom plate 126 and a partition 127 disposed opposite to the top plate 124. The top end of the partition 127 is fixedly connected to the lower surface of the top plate 124, and the bottom end of the partition 127 extends toward the bottom plate 126, forming a notch 128 between the partition 127 and the bottom plate 126. The partition 127 divides the liquid storage chamber 111 into a main chamber 129 and a buffer chamber 130. The main chamber 129 and the buffer chamber 130 are connected through the notch 128 between the partition 127 and the bottom plate 126.

[0038] In this embodiment, the partition 127 divides the liquid storage chamber 111 into a main chamber 129 and a buffer chamber 130. Liquid first flows slowly from the main chamber 129 into the buffer chamber 130 through the notch 128. The cross-sectional area of ​​the buffer chamber 130 is much smaller than that of the main chamber 129. When liquid flows out, the rate of drop in the liquid level in the buffer chamber 130 is much faster than that in the main chamber 129. However, due to the small volume of the buffer chamber 130, its liquid level fluctuation is limited to a relatively small absolute height range. According to the principle of hydrostatics (P=ρgh), the hydrostatic pressure of the through-hole 121 mainly depends on the liquid level height of the buffer chamber 130. Therefore, even if the liquid level in the main cavity 129 changes drastically from full to empty, the liquid level change in the buffer cavity 130 is relatively gradual, which greatly stabilizes the pressure in the through hole 121 and achieves a stable flow rate with approximately constant pressure. The vent hole 125 is located at the top of the liquid storage cavity 111 and is directly connected to the main cavity 129. It balances the atmospheric pressure in the main cavity 129 and ensures that the main cavity 129 can smoothly replenish the buffer cavity 130 through the bottom notch 128, further controlling the liquid level fluctuation in the buffer cavity 130 and keeping the liquid output from the through hole 121 stable.

[0039] In order to achieve a millisecond-level response of "bubbling when gas is released and stopping when gas is released", this application includes the following technical features.

[0040] like Figure 2 As shown, the one-way valve 114 includes a fixed plate 131, a mounting shaft 132, and a baffle 133. The fixed plate 131 is disposed in the mixing chamber 113 and is disposed opposite to the inner side wall of the mixing chamber 113. One end of the mounting shaft 132 is mounted to the inner side wall of the mixing chamber 113, and the other end is mounted to the fixed plate 131. The upper end of the baffle 133 is rotatably mounted to the mounting shaft 132. There is a gap 134 between the lower end of the baffle 133 and the bottom surface of the air intake channel 122. The gap 134 provides a rotation space for the baffle 133, preventing the baffle 133 from being stuck by the bottom surface of the air intake channel 122 when rotating.

[0041] In this embodiment, when the air pump 112 starts, the gas generated by the air pump 112 blows the baffle 133 to rotate, causing the one-way valve 114 to switch from the closed state to the open state, and the liquid in the liquid storage chamber 111 flows out from the through hole 121 due to gravity; when the air pump 112 is turned off, the baffle 133 resets due to its own gravity, causing the one-way valve 114 to switch from the open state to the closed state, and the baffle 133 blocks the through hole 121 again, forming a seal to prevent liquid from flowing out from the through hole 121, achieving a millisecond-level response of "air opens, foam comes out; air stops, foam stops", avoiding the start-stop delay of the electric pump, and making foam control more precise and efficient; the simplified structure releases internal space, reduces the overall weight, and provides greater flexibility for the industrial design of portable equipment such as floor scrubbers.

[0042] To prevent the baffle from rotating on its own when the cleaning equipment is moved or tilted, causing the liquid in the storage chamber to flow out of the through hole and leak, it is necessary to increase the sealing between the baffle and the through hole. This application includes the following technical features.

[0043] like Figure 2 As shown, the one-way valve 114 also includes an elastic device 135, which is mounted to the mounting shaft 132 to abut the baffle 133 against the through hole 121.

[0044] like Figure 2 as well as Figure 6 As shown, the elastic device 135 is a torsion spring, including a helical spring body 136 and two torsion arms 137. The helical spring body 136 is sleeved on the mounting shaft 132, and the two torsion arms 137 are respectively connected to the side wall of the second housing 117 and the baffle 133. Specifically, the two torsion arms 137 are respectively connected to the side wall 120 and the baffle 133. When the baffle 133 is rotated, the torsion arms 137 rotate, causing the helical spring body 136 to generate a reset torque, driving the baffle 133 to reset.

[0045] In this embodiment, the reset torque generated by the elastic device 135 drives the baffle 133 to reset, making the switching between the one-way valve 114 in the open and closed states more rapid, achieving a millisecond-level response of "gas opening and bubble opening, gas stopping and bubble stopping". When the baffle 133 is reset, the elastic force of the elastic device 135 itself can increase the pressure between the baffle 133 and the through hole 121, thereby increasing the sealing between the baffle 133 and the through hole 121.

[0046] like Figure 3 as well as Figure 7 As shown, the baffle 133 has a groove 138 on the side facing the through hole 121; the through hole 121 includes an elastic seal 139, which wraps the hole wall of the through hole 121. When the air pump 112 is turned off, a part of the elastic seal 139 protruding from the side wall of the second box 117 is located in the groove 138.

[0047] The elastic seal 139 relies on its own elastic contraction force to tightly close the internal flow channel, forming a reliable physical barrier and forming the first layer of seal. When the air pump 112 is turned off and the baffle 133 is reset, a part of the elastic seal 139 protruding from the side wall 137 is tightly fitted into the groove 138 of the baffle 133, which can achieve the second layer of seal, further ensuring that the liquid in the liquid storage chamber 111 will not drip or leak due to gravity or shaking when the cleaning equipment is static or when it is moved or tilted.

[0048] In order to enable the gas-liquid mixture and foam formed in the air intake channel to be conveyed to the foaming net assembly, this application includes the following technical features.

[0049] likeFigure 2 , Figure 5 as well as Figure 8 As shown, one end of the air intake passage 122 forms a wedge-shaped passage 140; along the airflow direction, the cross-sectional area of ​​the wedge-shaped passage 140 gradually decreases.

[0050] Specifically, the foam generating device 100 further includes a cover plate 141, which is installed on the housing 110. The surface of the cover plate 141 facing the bottom surface of the housing 110 has a sloping protrusion 142 that protrudes into the air inlet channel 122 and is close to a foam outlet 119. A partial sloping flat plate 143 is formed in the housing 110, which is opposite to the sloping protrusion 142. A wedge-shaped channel 140 is formed between the sloping flat plate 143 and the sloping protrusion 142.

[0051] In this embodiment, as the cross-sectional area of ​​the wedge channel 140 gradually decreases, the gas and liquid undergo intense shearing, collision and entrainment within the wedge channel 140, achieving the first efficient and thorough premixing of the gas and liquid phases, forming a gas-liquid mixture and a small amount of foam, laying a solid foundation for the subsequent formation of fine and uniform foam in the foaming net assembly 115.

[0052] According to the principle of fluid continuity, when compressed air passes through the wedge-shaped channel 140 with a gradually decreasing cross-sectional area, its velocity increases sharply, while the static pressure of the fluid decreases significantly, thus forming a local low-pressure zone at the narrowest point of the wedge-shaped channel 140. This low-pressure zone is connected to the foam outlet 119. Since the other end of the foam outlet 119 is connected to the foaming net assembly 115, a pressure differential suction force is generated when the pressure here is lower than the liquid source pressure. This force can "draw" the gas-liquid mixture and foam from the wedge-shaped channel 140 into the connecting pipe 123 and transport it to the foaming net assembly 115.

[0053] This application provides a cleaning device, including a foam nozzle and a foam generating device connected to the foam nozzle. The foam generating device includes a liquid storage chamber, an air pump, a mixing chamber, and a one-way valve. By completely eliminating the solution pump and its associated control system, and retaining only a single air pump and using air pressure to control the liquid path, the number of parts is significantly reduced and the structure is greatly simplified. Using only a single air pump as the sole power source reduces total power consumption and significantly reduces equipment operating noise compared to a dual-pump solution, thus improving the user experience. The one-way valve, driven directly and instantly by air pressure, controls the opening and closing of the liquid path, achieving a millisecond-level response of "foam starts when air is on, foam stops when air is off," avoiding the start-stop delay of an electric pump, and making foam control more precise and efficient. The simplified structure frees up internal space and reduces overall weight, providing greater flexibility for the industrial design of portable equipment such as floor scrubbers.

[0054] The above provides a detailed description of the cleaning device provided by the present invention. Specific examples have been used to illustrate the principle and implementation method of the present invention. The description of the above embodiments is only for the purpose of helping to understand the method and its core ideas. At the same time, for those skilled in the art, there will be changes in the specific implementation method and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A cleaning device, characterized in that, The device includes a foam nozzle and a foam generating device connected to the foam nozzle, the foam generating device comprising: A liquid storage chamber, used to store liquid, is provided with a liquid outlet; An air pump, used to generate gas; A mixing chamber for mixing the liquid and the gas to generate foam, the mixing chamber being provided with a liquid inlet, an air inlet and a foam outlet, the liquid outlet being connected to the liquid inlet, and the air pump being connected to the air inlet and communicating with the mixing chamber; A one-way valve is provided in the mixing chamber to control the opening and closing of the liquid inlet. When the one-way valve is open, the liquid in the storage chamber can flow into the mixing chamber from the liquid inlet under the action of gravity. When the air pump is off, the one-way valve is in the closed state; when the air pump is on, the airflow generated by the air pump can drive the one-way valve to switch from the closed state to the open state.

2. The cleaning equipment as described in claim 1, characterized in that, The foam generating device further includes: The casing includes a first housing and a second housing; The liquid storage chamber is formed in the first box, and the mixing chamber is formed in the second box.

3. The foam generating device as described in claim 2, characterized in that, The first box body includes a top plate, and the top plate is provided with ventilation holes.

4. The foam generating device as described in claim 2, characterized in that, The first housing includes: The top and bottom plates are set opposite each other; and A partition, the top of which is fixedly connected to the lower surface of the top plate, and the bottom of which extends toward the bottom plate and forms a gap with the bottom plate.

5. The foam generating device as described in claim 2, characterized in that, The one-way valve includes: A fixing plate is disposed inside the mixing chamber and is positioned opposite to the inner wall of the mixing chamber; A mounting shaft is installed, one end of which is attached to the inner wall of the mixing chamber, and the other end is attached to the fixing plate; and A baffle, the upper end of which is rotatably mounted to the mounting shaft.

6. The foam generating device as described in claim 5, characterized in that, The one-way valve also includes: An elastic device, mounted to a mounting shaft, is used to abut the baffle against the liquid inlet.

7. The foam generating device as described in claim 5, characterized in that, The baffle has a groove on the side facing the liquid outlet; The liquid inlet includes an elastic seal; When the air pump is turned off, a portion of the elastic seal protruding from the side wall of the second housing is located within the groove.

8. The foam generating device as described in claim 5, characterized in that, The mixing chamber is provided with an air intake channel; There is a gap between the lower end of the baffle and the bottom surface of the air intake channel.

9. The foam generating device as described in claim 6, characterized in that, The elastic device is a torsion spring, including a helical spring body and two torsion arms; the helical spring body is sleeved on the mounting shaft, and the two torsion arms are respectively connected to the side wall of the second housing and the baffle; when the baffle is rotated, the torsion spring deforms and generates a reset torque.

10. The foam generating apparatus as described in claim 8, characterized in that, One end of the air intake channel forms a wedge-shaped channel; Along the direction of airflow, the cross-sectional area of ​​the wedge-shaped channel gradually decreases.

11. The foam generating apparatus as described in claim 8, characterized in that, Also includes A cover plate is installed to the housing; the surface of the cover plate facing the bottom of the housing has a sloping protrusion that extends into the air intake channel and is close to the foam outlet; A portion of the housing is formed with a sloping flat plate, which is positioned opposite to the sloping protrusion. The wedge-shaped channel is formed between the inclined plate and the inclined protrusion.

12. The cleaning equipment as claimed in claim 1, characterized in that, Also includes: A foaming net assembly, including a connecting pipe connected to the foam outlet.

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