A mixing device and car washing cleaning system

Abstract

The application belongs to the technical field of car washing and cleaning, and particularly relates to a mixing device and a car washing and cleaning system. The foam mixing device comprises a mixing valve body, the mixing valve body is provided with a mixed liquid chamber, and liquid inlets, gas inlets and liquid outlets which are in communication with the mixed liquid chamber, wherein the liquid inlets and the liquid outlets are respectively arranged on two sides of the mixed liquid chamber, and the gas inlets are arranged on the flow paths from the liquid inlets to the liquid outlets. In the application, air can be injected into the mixed liquid chamber through the gas inlets, the air and the foam agent mixed with cleaning water are mixed in the mixed liquid chamber, the foam agent is fully foamed by using the bubble effect to realize the re-mixing of the cleaning water and the foam agent, the mixing is uniform, the mixing efficiency is high, the fully mixed and dissolved foam agent is output from the liquid outlets, the uniformity of the mixing of the foam agent and the cleaning water, the generation of the foam which is rich and has a fluffy texture, and the improvement of the cleaning effect, and the good practicability.

Description

Technical Field

[0001] This application belongs to the field of car wash and cleaning technology, specifically relating to a mixing device and a car wash and cleaning system. Background Technology

[0002] In related technologies, high-concentration foaming agents need to be mixed with clean water to form a low-concentration foam solution for use. However, in actual use, uneven mixing of clean water and foaming agent or poor foam quality often occurs, affecting the cleaning effect. Summary of the Invention

[0003] This application provides a mixing device and a car wash cleaning system to improve the uniformity of mixing foaming agent with cleaning water to a certain extent, and to generate rich and fluffy foam to improve the cleaning effect.

[0004] In a first aspect of this application, a foam mixing device is provided, the foam mixing device comprising: a mixing valve body, having a mixing chamber and an inlet, an air inlet and an outlet communicating with the mixing chamber, wherein: the inlet and the outlet are respectively disposed on both sides of the mixing chamber, and the air inlet is disposed on the flow path from the inlet to the outlet.

[0005] The mixing device provided in this application has a built-in mixing chamber in the mixing valve body, with the inlet and outlet located on opposite sides of the mixing chamber. Therefore, the foaming agent mixed with cleaning water can be injected into the mixing chamber through the inlet and discharged through the outlet. Since air can be injected into the mixing chamber through the air inlet, the air and the foaming agent mixed with cleaning water undergo gas-liquid mixing in the mixing chamber. The bubble effect effectively agitates the foaming agent, achieving a thorough remixing of the cleaning water and foaming agent. This results in uniform mixing and high mixing efficiency, allowing for the output of fully mixed and dissolved foaming agent from the outlet. The foaming agent mixes evenly with the cleaning water, generating rich and fluffy foam to improve cleaning performance, thus demonstrating excellent practicality.

[0006] In some implementations, the liquid inlet and the liquid outlet are respectively located at both ends of the body, and the air inlet is located around the periphery of the body.

[0007] In some embodiments, the foam mixing device further includes: a guide tube body, which is gapped inside the mixing valve body to form an air inlet channel with the mixing valve body, the air inlet being disposed on the side wall of the air inlet channel, the guide tube body connecting the liquid inlet and the mixing chamber, and the air inlet channel communicating with the mixing chamber.

[0008] In some implementations, the inlet end of the mixing chamber is provided with a plurality of air equalization holes to connect the air inlet channel and the mixing chamber, and the plurality of air equalization holes are provided on the outside of the guide tube.

[0009] In some implementations, the mixing valve body is provided with a connecting seat, and the inlet end of the guide tube body abuts against the connecting seat so that the end of the air inlet channel facing the liquid inlet is closed.

[0010] In some implementations, a connecting hole is provided in the middle of the connector, the connecting hole is located inside the inlet end of the guide tube body to connect the connecting hole and the guide tube body, and a one-way valve is provided inside the connecting hole.

[0011] In some embodiments, a baffle plate is provided on the outer edge of the outlet end of the guide tube, the baffle plate abuts against the inner wall of the mixing valve body, the baffle plate is configured as the inlet end of the mixing chamber, and the gas equalization hole is provided on the baffle plate.

[0012] In some embodiments, the foam mixing device further includes a liquid outlet pipe disposed within the liquid outlet of the mixing valve body.

[0013] In some embodiments, at least a portion of the outlet tube is a constriction section, the dimensions of which decrease sequentially in the direction away from the outlet.

[0014] In some embodiments, the inlet end of the liquid outlet pipe is inserted into the second enclosure, and a second sealing element is provided between the liquid outlet pipe and the second enclosure.

[0015] In a second aspect of this application, a car wash cleaning system is provided, the car wash cleaning system including the foam mixing device described above.

[0016] The car wash cleaning system equipped with the above-mentioned mixing device mixes air and foaming agent mixed with cleaning water in the mixing chamber. The foaming agent is fully dispersed by the bubble effect, and the cleaning water and foaming agent are mixed again. The mixing is uniform and the mixing efficiency is high. The fully mixed and dissolved foaming agent is output from the outlet. The uniformity of the mixing between the foaming agent and the cleaning water generates rich and fluffy foam, thereby improving the cleaning effect and making it very practical. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the filter structure in some embodiments is shown;

[0019] Figure 2 It shows Figure 1 A cross-sectional schematic diagram;

[0020] Figure 3 It shows Figure 1 A schematic diagram of the filter body in the diagram;

[0021] Figure 4 It shows Figure 3 A cross-sectional schematic diagram;

[0022] Figure 5 It shows Figure 1 A schematic diagram of the filter element in the diagram;

[0023] Figure 6 It shows Figure 1 A cross-sectional view of the removed filter element;

[0024] Figure 7 A schematic diagram of a check valve device in some embodiments is shown;

[0025] Figure 8 It shows Figure 7 A cross-sectional schematic diagram;

[0026] Figure 9 It shows Figure 7 A schematic diagram of the structure of the anti-reverse body in the middle;

[0027] Figure 10 It shows Figure 9 A cross-sectional schematic diagram;

[0028] Figure 11 A schematic diagram of the mixing device in some embodiments is shown;

[0029] Figure 12 It shows Figure 11 A cross-sectional schematic diagram;

[0030] Figure 13 It shows Figure 11 A schematic diagram of the structure of the mixing valve body in the diagram;

[0031] Figure 14 It shows Figure 13 Another perspective illustration;

[0032] Figure 15 It shows Figure 11 A schematic diagram of the internal components of the mixing valve body;

[0033] Figure 16 It shows Figure 15 Another structural diagram from a different perspective;

[0034] Figure 17 It shows Figure 11 A schematic diagram of the structure of the liquid outlet pipe;

[0035] Figure 18 A schematic diagram of the structure of a media switching device in some embodiments is shown;

[0036] Figure 19 It shows Figure 18 A cross-sectional schematic diagram;

[0037] Figure 20 It shows Figure 18 A schematic diagram of the switching valve body in the diagram;

[0038] Figure 21 It shows Figure 20 A cross-sectional schematic diagram;

[0039] Figure 22 It shows Figure 18 A schematic diagram of the valve core structure;

[0040] Figure 23 A schematic diagram of the layout of a car wash and cleaning system according to some embodiments is shown;

[0041] Figure 24 Schematic diagrams of the layout of car wash and cleaning systems according to other embodiments are shown.

[0042] Explanation of reference numerals in the attached figures:

[0043] Filter-1;

[0044] Filter body-11, filter channel-111,

[0045] First blocking component-12, water passage hole-121

[0046] Flushing component-13, flushing channel-131, limiting protrusion-132;

[0047] Filter element-14, filter holes-141;

[0048] Connector-15, Functional Channel-151, Step-152;

[0049] Check valve -2;

[0050] Check valve body-21, liquid inlet channel-211, first connecting hole-2111, second connecting hole-2112, connecting part-212, liquid outlet channel-213, liquid inlet end-214, connecting end-215, operating body-216, connecting body-217;

[0051] Second blocking component-22;

[0052] Expansion part-23;

[0053] Limiting component -24;

[0054] Annular protrusion-25, anti-rotation part-251;

[0055] Conveyor Channel -26;

[0056] Mixing device-3;

[0057] Mixing valve body-31, mixing chamber-311, liquid inlet-312, air inlet-313, liquid outlet-314;

[0058] Guide tube body-32, air inlet channel-321, air distribution hole-322, second step-323, baffle plate-324, first enclosure plate-325, first sealing element-326, second enclosure plate-327;

[0059] Connector-33, first step-311, connecting hole-312;

[0060] One-way valve-34;

[0061] Discharge tube body - 35, contraction section - 351, second seal - 352, connection end - 353;

[0062] Media switching device-4;

[0063] Switching valve body-41, medium inlet-412, medium outlet-413, first chamber-414, second chamber-415, guide groove-416, support part-417;

[0064] Valve core-42, transfer channel-421, first protrusion-422, second protrusion-423, guide part-424;

[0065] First reset component -43;

[0066] Third seal - 44;

[0067] Second reset component -45;

[0068] Valve cover -46, first channel -461, second channel -462;

[0069] Water source -5;

[0070] Foam pump-6;

[0071] Transfer pump-7;

[0072] Dragon Head -8;

[0073] Water tank -9;

[0074] Booster pump-10a;

[0075] Air pump-10b. Detailed Implementation

[0076] To enable those skilled in the art to more clearly understand this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0077] Example 1:

[0078] In related technologies, the cleaning water used for car washing needs to be filtered to prevent impurities in the water from clogging the filter after prolonged use. However, the filter needs to be disassembled and cleaned regularly, which is quite troublesome.

[0079] This application provides a filter and a car wash cleaning system, which aims to at least partially solve the technical problem of the inconvenience caused by the need for regular disassembly and cleaning of the filter.

[0080] Figure 1 A schematic diagram of the filter structure in some embodiments is shown. Figure 2 It shows Figure 1 A cross-sectional schematic diagram. Figure 3 It shows Figure 1 A schematic diagram of the filter body in the diagram. Figure 4 It shows Figure 3 A cross-sectional schematic diagram. Combined with... Figures 1-4 The filter 1 includes a filter body 11, a first blocking member 12, a flushing member 13, and a filter element 14. The filter body 11 is provided with a through filter channel 111. The first blocking member 12 is disposed in the filter channel 111 and inclined to the flow direction of the filter channel 111. The first blocking member 12 is provided with a water passage hole 121. The flushing member 13 is connected to the periphery of the filter body 11 and is provided with a through flushing channel 131. The flushing channel 131 is connected to the filter channel 111. The inlet end of the flushing channel 131 is located upstream of the first blocking member 12. The flushing channel 131 can be controlled to open and close. The filter element 14 is disposed at least at the water passage hole 121 of the first blocking member 12.

[0081] The filter 1 provided in this application has a first blocking member 12 in the filter channel 111, which is inclined to the flow direction of the filter channel 111. The filter 1 also has a water passage hole 121, and the filter element 14 is at least located at the water passage hole 121 of the first blocking member 12. Therefore, clean water introduced from the filter channel 111 can pass through the filter element 14 to output clean water after removing impurities. Since the flushing member 13 is connected to the periphery of the filter body 11, the flushing channel 131 of the flushing member 13 is connected to the filter channel 111, the inlet end of the flushing channel 131 is located upstream of the first blocking member 12, and the flushing channel 131 can be opened and closed in a controllable manner, the flushing channel 131 can be opened periodically to flush the impurities attached to the filter element 14, so that the filter 1 does not need to be cleaned by disassembling the filter 1, which is convenient and quick.

[0082] Combination Figure 3 as well as Figure 4 In some embodiments, the filter body 11 may be columnar, and the filter channel 111 is disposed through the axis of the filter body 11 to allow the passage of clean water. The first blocking member 12 is disposed in the filter channel 111 and is inclined toward the outlet end of the filter channel 111 to allow the passage of clean water.

[0083] Combination Figure 3 as well as Figure 4 In some embodiments, the first blocking member 12 may be configured as part of the sidewall of the inlet end of the flushing channel 131. That is, the first blocking member 12 is formed on the flushing member 13 to form part of the side of the flushing member 13, which may also be columnar, and correspondingly, the first blocking member 12 is an arc surface coaxial with the flushing channel 131.

[0084] Figure 5 It shows Figure 1 The structural diagram of the filter element in the diagram, combined with Figure 5 In some embodiments, the filter element 14 can be cylindrical, which runs through the axis and is disposed in the flushing channel 131. The filter element 14 covers the water passage hole 121 of the first blocking member 12. The filter element 14 has filter holes 141 at the water passage hole 121 on its periphery to filter the clean water drawn out from the water passage hole 121.

[0085] To facilitate the assembly of the filter element 14, filter holes 141 are provided all around the filter element 14 of this application, so as to eliminate the need for centering the filter element 14 during assembly and improve assembly efficiency.

[0086] Combination Figure 2 as well as Figure 4In some embodiments, the filter 1 may further include a connector 15 connected to the outlet end of the flushing channel 131. The filter element 14 is disposed between the inlet end of the flushing channel 131 and the connector 15. The connector 15 has a functional channel 151 communicating with the flushing channel 131. Water containing impurities drawn out of the flushing channel 131 can be discharged through the functional channel 151 on the connector 15. The connector 15 can be used to connect to a faucet pipe to draw water drawn out of the flushing element 13 through the functional channel 151, for example, for hand washing or cleaning cloths. This achieves the removal of filtered impurities in situations where filtered clean water is not required. Furthermore, the opening and closing of the flushing channel 131 can be controlled by opening and closing the faucet, which is convenient, quick, simple, and practical.

[0087] Combination Figure 2 as well as Figure 4 In some implementations, a limiting protrusion 132 may be provided on the inner side of the inlet end of the flushing channel 131. The limiting protrusion 132 may be annular. The inlet end of the filter element 14 is connected between the limiting protrusion 132 and the inner wall of the flushing element 13 to position the inlet end of the filter element 14.

[0088] In practice, the distance between the limiting protrusion 132 and the inner wall of the flushing member 13 can be adapted to the thickness of the inlet end of the filter element 14, or it can be greater than the thickness of the inlet end of the filter element 14; no limitation is imposed here. The inner side of the limiting protrusion 132 can be configured as the inlet of the flushing channel 131 to allow cleaning water to pass through.

[0089] Figure 6 It shows Figure 1 A cross-sectional view of the removed filter element. (Combined with...) Figure 6 In some embodiments, the inner wall of the inlet end of the functional channel 151 is provided with a step 152, and the outlet end of the filter element 14 abuts against the step 152. By limiting the inlet end of the flushing channel 131 through the step 152, the filter element 14 can be assembled inside the flushing channel 131.

[0090] In practice, the side wall of the outlet end of the filter element 14 can abut against the inner wall of the inlet end of the functional channel 151, and the outlet end of the filter element 14 abuts against the step 152.

[0091] Combination Figure 2 In some embodiments, the connector 15 and the flushing element 13 can be threaded together, so that the connector 15 can be quickly disassembled. In the event that the water output of the filter 1 is not good, the connector 15 can be quickly removed from the flushing element 13 to quickly replace the filter element 14.

[0092] In a specific implementation, the connector 15 can be threaded onto the inner side of the outlet end of the flushing channel 131 of the flushing member 13. A sealing strip can be wrapped between the connector 15 and the inner side of the outlet end of the flushing channel 131 to improve the sealing effect between the two.

[0093] It should be noted that the filter element 14 can also be provided only at the through hole on the first blocking member 12, achieving the same effect. For example, a groove can be provided at the edge of the through hole of the first blocking member 12, and the filter element 14 can be disposed in the groove. However, the assembly of the filter element 14 in this manner is more difficult and is considered an alternative solution.

[0094] In some embodiments, the included angle between the flushing element 13 and the filter element 14 can be between 30-60°, preferably 45°, but is not limited thereto.

[0095] In some embodiments, the filter body 11, the first blocking member 12, and the flushing member 13 can be integrally formed to facilitate the production and manufacturing of the filter 1.

[0096] This application also provides a car wash cleaning system, which includes the aforementioned filter 1.

[0097] The car wash cleaning system with the above-mentioned filter 1 can periodically open the flushing channel 131 of the filter 1 to flush away the impurities attached to the filter element 14, thus cleaning the filter 1 without having to disassemble it, which is convenient and quick.

[0098] Example 2:

[0099] In related technologies, the foaming agent and cleaning water used in car washing are both output through corresponding pumps, and the two share the same pipeline. Due to the high delivery pressure of clean water, unnecessary foam may be pumped out when only clean water is used, affecting the normal operation of the cleaning process.

[0100] This application provides a backflow prevention device, which aims to at least partially solve the technical problem that unwanted foam may be pumped out when only clean water is used, affecting the normal operation of the cleaning process.

[0101] Figure 7 A schematic diagram of a check valve device in some embodiments is shown. Figure 8 It shows Figure 7 A cross-sectional schematic diagram. Combined with... Figure 7 as well as Figure 8The anti-reverse device 2 provided in this application includes an anti-reverse body 21, a second blocking member 22, and an expansion member 23. The anti-reverse body 21 is provided with an inlet end 214 and a connecting end 215. An inlet channel 211 is provided inside the anti-reverse body 21, which extends from the inlet end 214 to the connecting end 215. A connecting part 212 is provided around the anti-reverse body 21, and an outlet channel 213 is provided on the connecting part 212. The outlet channel 213 communicates with the inlet channel 211. The second blocking member 22 is provided around the anti-reverse body 21 and is provided on one side of the connecting part 212. The other side of the connecting part 212 extends to the connecting end 215 of the anti-reverse body 21. The expansion member 23 is fitted onto the connecting part 212 of the anti-reverse body 21. Under the condition of conveying foam, the expansion member 23 expands radially along the anti-reverse body 21, so that the expansion member 23 and the connecting part 212 form a conveying channel 26, so that the foam is discharged through the conveying channel 26.

[0102] The anti-reverse device 2 provided in this application has an inlet channel 211 inside the anti-reverse body 21, which extends from the inlet end 214 to the connecting end 215. An outlet channel 213 is provided on the connecting portion 212 around the anti-reverse body 21, and the outlet channel 213 communicates with the inlet channel 211. Therefore, foaming agent delivered to the anti-reverse body 21 through the inlet channel 211 can be output through the outlet channel 213. Since the expansion member 23 is fitted onto the connecting portion 212 of the anti-reverse body 21, the expansion member 23 expands radially along the anti-reverse body 21 under foam delivery conditions to form a delivery channel 26, through which foam can be delivered. Since the second blocking member 22 is provided around the anti-reverse body 21 and on one side of the connecting portion 212, with the other side of the connecting portion 212 extending to the connecting end 215 of the anti-reverse body 21, foam can be delivered through the delivery channel 26 to the connecting end 215 of the connecting portion 212. In five locations, when the check valve 2 is installed in a pipeline shared with the clean water, the connecting end 215 of the check valve body 21 is connected to the pipeline, and the foam can be transported into the pipeline through the delivery channel 26. When pumping clean water, on the one hand, due to the presence of the connecting end 215 of the check valve body 21, the foam agent can be blocked from being output through the liquid outlet channel 213 to a certain extent, so as to avoid the phenomenon of pumping out the foam when only clean water is used, so as to ensure the normal operation of the cleaning process. On the other hand, when pumping clean water, the clean water acts on the circumferential surface of the expansion member 23 to avoid the formation of the aforementioned delivery channel 213, which can also block the foam agent from being output through the liquid outlet channel 213 to a certain extent. Furthermore, since the formation of the aforementioned delivery channel 213 is avoided, the phenomenon of clean water flowing back to the pump body used to transport the foam agent can also be avoided, so that the foam agent can be output normally when foam agent cleaning is required, which has good practicality.

[0103] Figure 9 It shows Figure 7 A schematic diagram of the anti-reverse body structure in the middle. Figure 10 It shows Figure 9 A cross-sectional schematic diagram. Combined with... Figure 8 as well as Figure 10 In some embodiments, the check valve body 21 may include an operating body 216 and a connecting body 217. One axial end of the operating body 216 may be configured as a liquid inlet end 214, and the other axial end of the operating body 216 may be configured as a second blocking member 22. The connecting body 217 is connected to the other axial end of the operating body 216. The periphery of the connecting body 217 may be configured as a connecting portion 212, and the end of the connecting body 217 away from the operating body 216 may be configured as a connecting end 215, so that the liquid inlet end 214 and the connecting end 215 are respectively provided at opposite ends of the check valve body 21.

[0104] Combination Figure 8 as well as Figure 10 In some embodiments, the operating body 216 can be generally cylindrical, and the operating body 216 is provided with a through first connecting hole 2111 along its axial direction to serve as part of the liquid inlet channel 211. The connecting body 217 can be coaxially arranged with the operating body 216, and the end of the connecting body 217 facing the operating body 216 is provided with a second connecting hole 2112 to serve as another part of the liquid inlet channel 211. The second connecting hole 2112 and the first connecting hole 2111 are connected to form the aforementioned liquid inlet channel 211. The liquid outlet channel 213 is provided on the circumferential surface of the connecting body 217 to communicate with the second connecting hole 2112.

[0105] In some embodiments, the diameter of the first connecting hole 2111 is larger than the diameter of the second connecting hole 2112, so that the foaming agent can be output more quickly.

[0106] It should be noted that in other embodiments, the diameters of the first connecting hole 2111 and the second connecting hole 2112 may be the same or different, and no limitation is made here.

[0107] Combination Figure 9 and Figure 10 In some embodiments, multiple liquid outlet channels 213 on the connecting part 212 may be provided circumferentially around the connecting part 212 so that the foam discharged from the liquid outlet channels 213 can act evenly on the expansion member 23, thereby improving the service life of the expansion member 23.

[0108] Combination Figures 7-10In some embodiments, a limiting member 24 may be provided around the periphery of the connecting end 215. The radial dimension of the limiting member 24 is smaller than the radial dimension of the second blocking member 22, and the expansion member 23 is disposed between the second blocking member 22 and the limiting member 24. Since the radial dimension of the limiting member 24 is smaller than the radial dimension of the second blocking member 22, when the expansion member 23 expands upon contact with foam, the end of the conveying channel 26 facing the second blocking member 22 is closed by the second blocking member 22, so that the foam can only be output through the end of the conveying channel 26 facing the limiting member 24.

[0109] Combination Figure 7 as well as Figure 9 In some embodiments, the connecting end 215 may be tapered, with its size decreasing sequentially in the direction away from the second blocking member 22, so as to facilitate the installation of the expansion member onto the connecting portion 212, and the back of the connecting end 215 may be configured as the aforementioned limiting member 24.

[0110] It should be noted that the diameter of the conveying channel 26 formed after the expansion member 23 expands should preferably not be greater than the outer diameter of the limiting member 24, so as to prevent the expansion member from being carried into the pipeline by the foam. In addition, when the check valve 2 is used, the expansion member 23 is inserted into the pipeline, and the expanded expansion member 23 can be limited by the side wall of the pipeline, which can also prevent it from being carried into the pipeline by the foam.

[0111] In some embodiments, the expansion member 23 may be connected to the second blocking member 22, for example by injection molding or bonding, to prevent the expansion member 23 from being carried into the pipeline by foam during long-term use, or / and the portion of the expansion member 23 facing the second blocking member 22 may be connected to the connecting portion 212, for example by injection molding, bonding or clamping, to prevent the expansion member 23 from being carried into the pipeline by foam during long-term use.

[0112] Combination Figure 7 as well as Figure 9 In some embodiments, annular protrusions 25 may be provided around the periphery of the operating body 216. At least a portion of the periphery of the annular protrusion 25 is provided with an operating part 251 to quickly install the anti-reverse device 2 using a wrench or other tools. In specific implementations, a planar portion may be provided on the periphery of the annular protrusion 25 to serve as the aforementioned operating part 251. This planar portion may be continuously arranged at intervals around the annular protrusion 25 so that the annular protrusion 25 forms a regular polygon, or multiple portions may be arranged at intervals; no limitation is made here.

[0113] In some embodiments, the operating body 216, the connecting body 217, and the limiting member 24 can be integrally molded to facilitate manufacturing. The expansion member 23 can be made of an elastic material so that it can expand rapidly under the action of foam, and automatically reset when there is no foam output.

[0114] In some embodiments, the inlet channel 211 is arranged approximately along the axis of the check body 21, while the outlet channel 213 is arranged approximately along the radial direction of the connecting portion 212, so that the inlet channel 211 and the outlet channel 213 are arranged perpendicularly. In conjunction with the expansion member 23 wrapped on the connecting portion, it can also play the role of check and prevent foam liquid from being sucked into the pipeline.

[0115] This application also provides a car wash and cleaning system, which includes the aforementioned anti-reverse device 2.

[0116] The car wash cleaning system equipped with the aforementioned anti-reverse device 2 can, to a certain extent, prevent the foam agent from being output through the liquid outlet channel 213, thereby avoiding the phenomenon of the foam being pumped out when only clean water is used, so that the cleaning process can operate normally; in addition, it can also prevent the phenomenon of cleaning water flowing back to the pump body used to deliver the foam agent, so that the foam agent can be output normally when foam agent cleaning is required, which has great practicality.

[0117] Example 3:

[0118] In related technologies, high-concentration foaming agents need to be mixed with cleaning water to form a low-concentration foam solution for use. However, in actual use, it often happens that only cleaning water or only high-concentration foaming agent is sprayed, resulting in uneven mixing of water and foaming agent or poor foam quality, which affects the cleaning effect.

[0119] Based on the above-mentioned technical problems, this application provides a mixing device to improve the uniformity of mixing foaming agent with cleaning water to a certain extent, and to generate rich and fluffy foam to improve the cleaning effect.

[0120] Figure 11 A schematic diagram of the structure of the mixing device 3 in some embodiments is shown. Figure 12 It shows Figure 11 A cross-sectional schematic diagram. Combined with... Figure 11 as well as Figure 12 The mixing device 3 provided in this application includes a mixing valve body 31, wherein the mixing valve body 31 is provided with a mixing chamber 311 and an inlet 312, an air inlet 313 and an outlet 314 communicating with the mixing chamber 311. The inlet 312 and the outlet 314 are respectively provided on both sides of the mixing chamber 311, and the air inlet 313 is provided on the flow path from the inlet 312 to the outlet 314.

[0121] The mixing device 3 provided in this application has a mixing chamber 311 built into the mixing valve body 31. The inlet 312 and outlet 314 are respectively located on both sides of the mixing chamber 311. Therefore, the foaming agent mixed with cleaning water can be injected into the mixing chamber 311 through the inlet 312 and discharged through the outlet 314. Since air can be injected into the mixing chamber 311 through the air inlet 313, the air and the foaming agent mixed with cleaning water are mixed in the mixing chamber 311. The foaming agent is fully aerated by the bubble effect to achieve the remixing of cleaning water and foaming agent. The mixing is uniform and the mixing efficiency is high. The fully mixed and dissolved foaming agent is output from the outlet 314. The foaming agent is mixed with the cleaning water uniformly and can generate rich and fluffy foam to improve the cleaning effect. It has good practicality.

[0122] Figure 13 It shows Figure 11 A schematic diagram of the mixing valve body in the diagram. Figure 14 It shows Figure 13 A structural diagram from another perspective. Combined with... Figure 13 as well as Figure 14 In some embodiments, the cross-section of the mixing valve body 31 can be approximately a regular polygon. Since the surface of the mixing valve body 31 is flat, it can prevent the mixing device 3 from rotating during storage and also facilitates the use of a wrench. In other embodiments, the mixing valve body 31 can also be cylindrical, and there is no limitation on this.

[0123] Combination Figure 12 In some embodiments, the inlet 312 and outlet 314 can be respectively located at both ends of the mixing valve body 31, and the air inlet 313 is located around the mixing valve body 31. The foaming agent mixed with cleaning water can be injected into the mixing chamber 311 through the inlet 312 at one end of the mixing valve body 31 and discharged through the outlet 314 at the other end of the mixing valve body 31. Air can be injected into the mixing chamber 311 through the air inlet 313 around the mixing valve body 31. The air and the foaming agent mixed with cleaning water are mixed in the mixing chamber 311. The foaming agent is fully dispersed by the bubble effect to achieve the re-mixing of cleaning water and foaming agent. The mixing is uniform and the mixing efficiency is high, so that the fully mixed and dissolved foaming agent is output from the outlet 314. The uniformity of the mixing of foaming agent and cleaning water improves the cleaning effect.

[0124] Combination Figure 12In some embodiments, the mixing device 3 may further include a guide tube 32, which is interposed within the mixing valve body 31. The guide tube 32 and the mixing valve body 31 form an air inlet channel 321. An air inlet 313 is disposed on the side wall of the air inlet channel 321. The guide tube 32 connects the liquid inlet 312 and the mixing chamber 311, and the air inlet channel 321 and the mixing chamber 311 are in communication. In practice, air is injected into the air inlet channel 321 through the air inlet 313 and then enters the mixing chamber 311 to mix with the foaming agent mixed with clean water in the mixing chamber 311.

[0125] Combination Figure 13 as well as Figure 14 In some embodiments, an air inlet 313 may be provided on the side wall of the air inlet channel 321, or multiple inlets may be provided at circumferential intervals around the mixing valve body 31, without limitation.

[0126] Figure 15 It shows Figure 11 A schematic diagram of the internal components of the mixing valve body. (Combined with...) Figure 12 as well as Figure 15 In some embodiments, the inlet end of the mixing chamber 311 may be provided with a uniform air hole 322. The uniform air hole 322 connects the air inlet channel 321 and the mixing chamber 311. The uniform air hole 322 is located on the outside of the guide tube 32 so that air enters the air inlet channel 321 and is then injected into the mixing chamber 311 through the uniform air hole 322.

[0127] Combination Figure 14 In some embodiments, multiple air distribution holes 322 may be arranged circumferentially around the guide tube body 32. These multiple air distribution holes 322 collectively introduce air into the mixing chamber 311 to further enhance the bubble effect of air in the mixing chamber 311, thereby further dispersing the foaming agent and achieving remixing of the cleaning water and foaming agent, thus improving the uniformity of the mixture. In other embodiments, only one air distribution hole 322 may be provided; this is not a limitation.

[0128] Combination Figures 12-14 In some embodiments, a connecting seat 33 is provided inside the mixing valve body 31, and the inlet end of the guide tube body 32 abuts against the connecting seat 33 to close the inlet end of the air intake passage 321.

[0129] Combination Figure 12 In specific implementation, the end of the connecting seat 33 facing the guide tube body 32 may be provided with a first step 311, while the outer edge of the inlet end of the guide tube body 32 is provided with a second step 323. The second step 323 overlaps the first step 311, and a sealing element may be provided between the two to improve the sealing performance of the second step 323 assembled on the first step 311.

[0130] Combination Figure 12 as well as Figure 14 In some embodiments, a connecting hole 312 may be provided in the middle of the connecting seat 33. The connecting hole 312 is located in the inlet end of the guide tube body 32 to connect the connecting hole 312 with the guide tube body 32 so that the foaming agent mixed with cleaning water can be transported through the connecting hole 312 into the guide tube body 32 and then transported into the mixing chamber 311.

[0131] Combination Figure 12 In some embodiments, a one-way valve 34 may be provided in the connecting hole 312, which can prevent the foaming agent mixed with cleaning water from flowing back, and can also accelerate the spraying of cleaning water to improve the uniformity of mixing.

[0132] Figure 16 It shows Figure 15 Another structural diagram from a different perspective, combined with Figure 12 , Figure 15 as well as Figure 16 In some embodiments, a baffle plate 324 is provided on the outer edge of the outlet end of the guide tube 32. The baffle plate 324 abuts against the inner wall of the mixing valve body 31. The baffle plate 324 can be configured as the inlet end of the mixing chamber 311, and the aforementioned air equalization hole 322 can be provided on the baffle plate 324.

[0133] Combination Figure 12 , Figure 15 as well as Figure 16 In some embodiments, the mixing device 3 may further include a first enclosure 325 disposed at the edge of the end of the barrier plate 324 facing the outlet 314 and extending in the direction of the outlet 314 to form an end-open chamber, which is the aforementioned mixing chamber 311, and the opening end of the chamber is the outlet 314 of the mixing valve body 31.

[0134] Combination Figure 12 , Figure 15 as well as Figure 16 In some embodiments, a first sealing element 326 may be provided between the first enclosure 325 and the inner wall of the mixing valve body 31 to prevent air leakage from between the barrier plate 324 and the inner wall of the mixing valve body 31. Specifically, a recess may be provided on the inner wall of the mixing valve body 31, with the recess spaced outside the first enclosure 325. The recess may extend to the end of the liquid outlet 314 of the mixing valve body 31. A first receiving groove is provided on the opposite side of the recess and the first enclosure 325, and the first sealing element 326 is disposed in the first receiving groove on the opposite side of the recess and the first enclosure 325.

[0135] Combination Figure 12 , Figure 15 as well as Figure 16In some embodiments, the mixing device 3 may further include a second enclosure 327 disposed at the end of the first enclosure 325 to extend the container of the mixing chamber 311. The end of the second enclosure 327 facing the first enclosure 325 is located on the end of the mixing valve body 31. The first seal 326 is assembled at the connection between the second enclosure 327 and the first enclosure 325.

[0136] Combination Figure 12 In some embodiments, the mixing device 3 may further include an outlet pipe 35 disposed within the outlet 314 of the mixing valve body 31 to connect to the mixing chamber 311. The foaming agent mixed and dispersed by air in the mixing chamber 311 can be led out through the outlet pipe 35.

[0137] Figure 17 It shows Figure 11 A schematic diagram of the liquid outlet pipe. (Combined with...) Figure 12 as well as Figure 17 In some embodiments, at least a portion of the outlet pipe 35 is a constriction section 351. The dimensions of the cross-section of the constriction section 351 perpendicular to the flow path gradually decrease in the direction away from the outlet 314, thereby allowing the foaming agent, which is mixed and dispersed by air, to be sprayed out of the outlet pipe 35 at high speed. The constriction section 351 can be frustoconical, and it can be directly connected to the outlet 314 of the mixing valve body 31, or it can be indirectly connected to the outlet 314 of the mixing valve body 31 through a channel; there is no limitation on this.

[0138] Combination Figure 12 , Figure 16 as well as Figure 17 In some embodiments, the inlet end of the outlet pipe 35 can be inserted into the second enclosure 327, and a second seal 352 can be provided between the two to prevent the foaming agent from leaking from the gap between them. In specific implementation, a second receiving groove can be provided on the opposite side of the outlet pipe 35 and the enclosure, and the second seal 352 is provided in the second receiving groove on the opposite side of the outlet pipe 35 and the second enclosure 327.

[0139] It should be noted that the guide tube body 32, the baffle plate 324, the first enclosure plate 325 and the second enclosure plate 327 can be integrally formed, and the first enclosure plate 325 can be threaded into the mixing valve body 31, and the liquid outlet tube body 35 can be threaded into the second enclosure plate 327 for easy assembly.

[0140] Combination Figure 12 as well as Figure 17 In some embodiments, the outlet pipe 35 has a connecting end 215 extending out of the mixing valve body for connection with a pipeline to deliver the foaming agent to the appropriate work site.

[0141] This application also provides a car wash cleaning system, which includes the above-mentioned mixing device 3.

[0142] The car wash cleaning system equipped with the above-mentioned mixing device 3 mixes air and foaming agent mixed with cleaning water in the mixing chamber 311. The foaming agent is fully dispersed by the bubble effect to achieve a remixing of cleaning water and foaming agent. The mixing is uniform and efficient, so that the fully mixed and dissolved foaming agent is output from the outlet 314. The foaming agent and cleaning water are mixed uniformly and can generate rich and fluffy foam to improve the cleaning effect. It has good practicality.

[0143] Example 4:

[0144] The relevant technology requires the configuration of a foam gun and a cleaning water gun. The foam gun needs to be equipped with a foam pipeline to supply foam, and the cleaning water gun needs to be equipped with a cleaning water pipeline to supply cleaning water. The operation is cumbersome and the use is relatively troublesome.

[0145] Based on the above-mentioned technical problems, this application provides a medium switching device 4 to solve, to a certain extent, the technical problem of cumbersome switching between foam and clean water.

[0146] Figure 18 A schematic diagram of the media switching device in some embodiments is shown. Figure 19 It shows Figure 18 A cross-sectional schematic diagram. Combined with... Figure 18 as well as Figure 19 The medium switching device provided in this application includes a switching valve body 41 and a valve core 42. The switching valve body 41 has a medium inlet 412 and a medium outlet 413 at its two ends. The valve core 42 is disposed inside the switching valve body 41 and has a transfer channel 421. The two ends of the transfer channel 421 are connected to the medium inlet 412 and the medium outlet 413. The diameter of the transfer channel 421 is smaller than the diameter of the medium outlet 413. The valve core 42 can reciprocate between the medium inlet 412 and the medium outlet 413. The outlet end of the valve core 42 can move into the medium outlet 413 or move from the medium outlet 413 into the valve body so that the medium is output through the transfer channel 421 or the medium outlet 413.

[0147] The media switching device provided in this application, since the valve core 42 is disposed within the switching valve body 41 and reciprocates between the media inlet 412 and the media outlet 413, under the condition of conveying clean water, high-pressure clean water is conveyed to the switching valve body 41 through the media inlet 412 to drive the valve core 42 to move towards the media outlet 413 until the outlet end of the valve core 42 moves into the media outlet 413. The clean water in the switching valve body 41 is then output through the transfer channel 421 of the valve core 42. Since the orifice of the transfer channel 421 is smaller than that of the media outlet 413, the valve core 42 is used to switch the media switching device. The aperture of 3 allows for high-pressure output of clean water. Under the condition of conveying foaming agent, the foaming agent is conveyed to the switching valve body 41 through the medium inlet 412. Since the input pressure of the foaming agent is less than the input pressure of the clean water, the valve core 42 moves towards the medium inlet 412. The outlet end of the valve core 42 returns from the medium outlet 413 to the switching valve body 41. The foaming agent is output through the transfer channel 421 and the medium outlet 413 of the switching valve body 41. Since the aperture of the transfer channel 421 is smaller than the aperture of the medium outlet 413, the foaming agent can be output at low pressure.

[0148] In addition, since the valve core 42 can reciprocate within the valve body 41, there is a gap between the valve core 42 and the valve body 41. Under the condition of conveying foaming agent, the foaming agent will also pass through the gap between the valve core 42 and the valve body 41 to be further sprayed out from the medium outlet 413. This allows as much space as possible for the low-pressure medium to pass through in order to ensure its low-pressure characteristics.

[0149] The media switching device provided in this application can automatically switch the output position according to the input medium so that the input medium is output at a suitable pressure. It can automatically complete the media switching according to the medium pressure without additional complicated operations, which is simple, convenient and highly practical.

[0150] Figure 20 It shows Figure 18 A schematic diagram of the switching valve body in the diagram. Figure 21 It shows Figure 20 A cross-sectional schematic diagram. Combined with... Figure 20 as well as Figure 21 The switching valve body 41 can be roughly cylindrical and is arranged through the axis. One axial end of the switching valve body 41 is defined as the inlet end of the switching valve body 41, and the medium inlet 412 is provided at the inlet end of the switching valve body 41. The other axial end of the switching valve body 41 is defined as the outlet end of the switching valve body 41, and the medium outlet 413 is provided at the middle of the outlet end of the switching valve body 41. The outlet end of the switching valve body 41 has a support part 417 provided at the edge of the medium outlet 413 for subsequent assembly of the first reset member 43.

[0151] Combination Figure 19In some embodiments, a first reset member 43 may be provided between the valve core 42 and the switching valve body 41, so that the valve core 42 can be driven to reciprocate between the medium inlet 412 and the medium outlet 413 by the elastic deformation of the first reset member 43.

[0152] Combination Figure 19 In some embodiments, the first reset member 43 may be disposed between the periphery of the valve core 42 and the outlet end of the switching valve body 41. When conveying clean water, high-pressure clean water is delivered to the switching valve body 41 through the medium inlet 412, driving the valve core 42 to move towards the medium outlet 413 until the outlet end of the valve core 42 reaches the medium outlet 413, simultaneously compressing the first reset member 43. When conveying foaming agent, the foaming agent is delivered to the switching valve body 41 through the medium inlet 412. Since the input pressure of the foaming agent is less than the input pressure of the clean water, the first reset member 43 resets, driving the valve core 42 to move towards the medium inlet 412.

[0153] Figure 22 It shows Figure 18 A schematic diagram of the valve core structure. (Combined with...) Figure 22 In a specific implementation, the valve core 42 may be provided with a first protrusion 422 around its periphery. The two ends of the first reset member 43 are respectively connected between the first protrusion 422 and the support portion at the outlet end of the switching valve body 41, and are fitted onto the periphery of the valve core 42. The two ends of the first reset member 43 may abut against the first protrusion 422 and the support portion 417 at the outlet end of the switching valve body 41, or they may be connected to the first protrusion 422 and the outlet end of the switching valve body 41 by welding, snap-fitting, or other means, without limitation.

[0154] Combination Figure 19 as well as Figure 21 In some embodiments, the switching valve body 41 is provided with a first cavity 414 and a second cavity 415. The first cavity 414 and the second cavity 415 are arranged sequentially from the inlet end of the switching valve body 41 to the outlet end of the switching valve body 41. The aperture of the second cavity 415 is smaller than the aperture of the first cavity 414. The first protrusion 422 is gapped in the first cavity 414 so that the first protrusion 422 can move back and forth in the first cavity 414. Under the condition of conveying clean water, the first protrusion 422 can block the inlet of the second cavity 415, so that the clean water can only be output through the transfer channel 421 on the valve core 42.

[0155] Combination Figure 19 In some embodiments, a third seal 44 is provided between the inlet of the first protrusion 422 and the second cavity 415 to prevent cleaning water from entering the second cavity 415 from the gap between them, thereby reducing the output pressure of the cleaning water.

[0156] Combination Figure 19 as well as Figure 22 In some embodiments, a second protrusion 423 may be provided around the valve core 42. The second protrusion 423 can reciprocate within the first cavity 414, and a second reset member 45 is provided between the inlet end of the second protrusion 423 and the second cavity 415. Under the condition of conveying clean water, high-pressure clean water is conveyed to the switching valve body 41 through the medium inlet 412 to drive the valve core 42 to move towards the medium outlet 413 until the outlet end of the valve core 42 moves into the medium outlet 413. At the same time, the first reset member 43 and the second reset member 45 are compressed. Under the condition of conveying foaming agent, foaming agent is conveyed to the switching valve body 41 through the medium inlet 412. Since the input pressure of the foaming agent is less than the input pressure of the clean water, the first reset member 43 and the second reset member 45 are reset to drive the valve core 42 to move towards the medium inlet 412.

[0157] In specific implementation, the two ends of the second reset member 45 can abut against the inlet end of the second protrusion 423 and the second cavity 415, or they can be connected to the inlet end of the second protrusion 423 and the second cavity 415 by welding, snap-fitting or other means, without any restrictions.

[0158] Combination Figure 19 , Figure 21 as well as Figure 22 In some embodiments, the inner wall of the first cavity 414 may be provided with a guide groove 416, and the second protrusion 423 may slide in the guide groove 416 to improve the guidance of the reciprocating movement of the second protrusion 423 in the first cavity 414.

[0159] Combination Figure 22 In specific implementation, multiple second protrusions 423 can be arranged circumferentially around the valve core 42, and the guide grooves 416 and the second protrusions 423 are arranged one-to-one, with the second protrusions 423 slidingly disposed in the corresponding guide grooves 416.

[0160] It should be noted that both the first reset member 43 and the second reset member 45 can be springs, and the two reset members can ensure that the valve core 42 can be quickly reset. In other embodiments, only one of the first reset member 43 and the second reset member 45 may be provided, and this is not a limitation.

[0161] Additionally, those skilled in the art will understand that a first reset member 43 can also be provided around the valve core 42 and at the inlet end of the switching valve body 41. When conveying clean water, high-pressure clean water is delivered to the switching valve body 41 through the medium inlet 412, driving the valve core 42 to move towards the medium outlet 413 until the outlet end of the valve core 42 reaches the medium outlet 413, simultaneously stretching the first reset member 43. When conveying foaming agent, the foaming agent is delivered to the switching valve body 41 through the medium inlet 412. Since the input pressure of the foaming agent is less than the input pressure of the clean water, the first reset member 43 resets, driving the valve core 42 to move towards the medium inlet 412. The reset member located between the valve core 42 and the inlet end of the switching valve body 41, being completely submerged in clean water or foaming agent, may have some impact on its lifespan and is therefore an alternative solution.

[0162] Combination Figure 19 In some embodiments, the inlet end of the transfer channel 421 may be provided with a guide portion 424, the diameter of which decreases sequentially along the direction from the medium inlet 412 to the medium outlet 413. For example, the guide portion 424 may be frustoconical to introduce the medium into the transfer channel 421.

[0163] The guide portion 424 and the surface where its inlet is located initially bear the liquid pressure, creating a thrust that pushes the valve core 42 towards the outlet end of the valve body 41. When the first protrusion 422 moves to the second cavity 415 that can block the valve body 41, the corresponding reset member is configured with a deformation restoring force (including the first reset member 43 and / or the second reset member 45). This deformation restoring force is less than or equal to the thrust exerted by the high-pressure cleaning water on the guide portion 424 and the surface where its inlet is located, and greater than the thrust exerted by the low-pressure foaming agent water on the guide portion 424 and the surface where its inlet is located, to ensure high-pressure cleaning... When water is input, it pushes the valve core 42 to the inlet end of the second cavity 415 and blocks the inlet end of the second cavity 415, so that the high-pressure cleaning water cannot flow into the second cavity 415 through the gap between the valve body 41 and the valve core 42, but can only be output through the transfer channel 421. When low-pressure foaming agent is input, under the action of deformation restoring force, the first protrusion 422 returns to the initial position, and the low-pressure foaming agent flows into the second cavity 415 through the gap between the first protrusion 422 and the valve body 41, so that the low-pressure foaming agent is output through the transfer channel 421 and the medium outlet 413 of the switching valve body 41, so as to achieve the purpose of automatically switching the medium spraying based on the medium liquid pressure.

[0164] Combination Figures 18-21In some embodiments, a valve cover 46 may be provided on the switching valve body 41. The valve cover 46 is configured as the inlet end of the switching valve body 41, and the medium inlet 412 is opened on the valve cover 46. The valve cover 46 can be threadedly connected to the switching valve body 41, which can limit the movement of the valve core 42 and facilitate the assembly and maintenance of the valve core 42 in the switching valve body 41.

[0165] Combination Figure 18 as well as Figure 20 In some embodiments, the medium inlet 412 may include a first channel 461 and a second channel 462 that are sequentially connected along the direction from the medium inlet 412 to the medium outlet 413. The first channel 461 and the second channel 462 are disposed on the valve cover 46. The aperture of the second channel 462 is larger than the aperture of the first channel 461 and the aperture of the second channel 462 is larger than the aperture of the inlet end of the transfer channel 421, so as to accommodate more medium.

[0166] This application also provides a car wash cleaning system, which includes the aforementioned media switching device.

[0167] The car wash cleaning system equipped with the above-mentioned media switching device can automatically switch the output position according to the input medium so that the input medium is output at a suitable pressure. The media switching can be completed without operation, which is simple, convenient and highly practical.

[0168] Example 5:

[0169] This application provides a car wash and cleaning system, which includes at least one component shown in Embodiments 1 to 4. It may include any one of the components in Embodiments 1 to 4, or it may be a combination of at least two components in Embodiments 1 to 4.

[0170] Figure 23 Schematic diagrams illustrating the layout of car wash and cleaning systems according to some embodiments are shown. (In conjunction with...) Figure 23In some embodiments, the car wash cleaning system includes a water source 5, a filter 1, a water tank 9, a check valve 2, a foam pump 6, a delivery pump 7, and a faucet 8. The water source 5, filter 1, water tank 9, and delivery pump 7 are connected in sequence. The functional channel of filter 1 is connected to faucet 8. Foam pump 6 and check valve are connected in sequence in the pipeline between water tank 9 and delivery pump 7. In specific implementation, the cleaning water supplied by water source 5 flows into water tank 9 after being filtered by filter 1. The water flowing out of the functional channel of filter 1 can be output through faucet 8 for hand washing and / or cleaning cloths. Delivery pump 7 operates to pump out the filtered cleaning water in water tank 9. During the pumping of cleaning water, foam pump 6 outputs foam agent through check valve 2 into the pipeline connecting water tank 9 and delivery pump 7, so that foam agent mixes with cleaning water to form a foam solution, which is then pumped out by delivery pump 7 for cleaning vehicles.

[0171] Figure 24 Schematic diagrams illustrating the layout of car wash and cleaning systems according to other embodiments are shown. (In conjunction with...) Figure 24 In some other embodiments, the car wash cleaning system includes a water source 5, a filter 1, a water tank 9, a check valve 2, a foam pump 6, a delivery pump 7, a faucet 8, a booster pump 10a, an air pump 10b, a mixing device 3, and a media switching device 4. The water source 5, filter 1, water tank 9, and delivery pump 7 are connected in sequence. The functional channel of filter 1 is connected to faucet 8. Water tank 9 is also connected in sequence to booster pump 10a, mixing device 3, and media switching device 4. Foam pump 6 and check valve are connected in sequence to the pipeline between water tank 9 and booster pump 10a. Air pump 10b is also connected to mixing device 3. In practice, the clean water supplied by water source 5 is filtered by filter 1 and then flows into water tank 9 for storage. The water flowing out of the functional channel of filter 1 can be output through faucet 8 for hand washing and / or cleaning cloths. The delivery pump 7 operates to pump the filtered clean water in water tank 9 to media switching device 4. The foam pump 6 outputs foam agent through check device 2 to the pipeline between water tank 9 and booster pump 10a, so that the foam agent mixes with the clean water to form a foam solution, which is then pumped out by booster pump to mixing device 3. Air pump 10b pumps air into mixing device 3 to make the foam solution more uniformly mixed. The uniformly mixed foam solution is delivered to media switching device 4. The output path is automatically switched according to the concentration of the input clean water and foam solution to output different car wash media for cleaning vehicles.

[0172] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0173] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0174] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0175] Furthermore, the use of terms such as "first" and "second" in this application is 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, features defined with "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0176] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A foam mixing device, characterized in that, The foam mixing device includes: The mixing valve body is provided with a mixing chamber and an inlet, an air inlet, and an outlet communicating with the mixing chamber, wherein: The liquid inlet and the liquid outlet are respectively located on both sides of the mixing chamber, and the air inlet is located on the flow path from the liquid inlet to the liquid outlet.

2. The foam mixing device according to claim 1, characterized in that, The liquid inlet and the liquid outlet are respectively located at both ends of the main body, and the air inlet is located around the entire body.

3. The foam mixing device according to claim 2, characterized in that, The foam mixing device further includes: A guide tube is disposed within the mixing valve body to form an air inlet channel with the mixing valve body. The air inlet is disposed on the side wall of the air inlet channel. The guide tube connects the liquid inlet and the mixing chamber. The air inlet channel and the mixing chamber are in communication.

4. The foam mixing device according to claim 3, characterized in that, The inlet end of the mixing chamber is provided with multiple air equalization holes to connect the air inlet channel and the mixing chamber. The multiple air equalization holes are located on the outside of the guide tube.

5. The foam mixing apparatus according to any one of claims 3-4, characterized in that, The mixing valve body is provided with a connecting seat, and the inlet end of the guide tube body abuts against the connecting seat so that the end of the air inlet channel facing the liquid inlet is closed.

6. The foam mixing device according to claim 5, characterized in that, The connecting seat has a connecting hole in the middle, which is located inside the inlet end of the guide tube to connect the connecting hole and the guide tube. A one-way valve is installed inside the connecting hole.

7. The foam mixing apparatus according to any one of claims 3-4, characterized in that, A baffle plate is provided on the outer edge of the outlet end of the guide tube. The baffle plate abuts against the inner wall of the mixing valve body. The baffle plate is configured as the inlet end of the mixing chamber. The gas equalization hole is provided on the baffle plate.

8. The foam mixing apparatus according to any one of claims 1-4, characterized in that, The foam mixing device also includes a liquid outlet pipe, which is disposed inside the liquid outlet of the mixing valve body.

9. The foam mixing device according to claim 8, characterized in that, At least a portion of the outlet pipe is a constriction section, and the dimensions of the cross-section of the constriction section perpendicular to the flow path decrease sequentially in the direction away from the outlet.

10. A car wash and cleaning system, characterized in that, The car wash cleaning system includes the foam mixing device according to any one of claims 1-9.

Images