Residual water removal device and dishwasher

Abstract

A residual water removal device and a dishwasher, wherein the residual water removal device (10) includes a water supply body (100) having a first passage (110) formed therein, and a drain body (200) connected to the water supply body (100) and having a second passage (210) formed therein, wherein the first passage (110) is in communication with the second passage (210), and the first passage (110) has a communication port in communication with the second passage (210), The area of ​​the opening is equal to or less than the cross-sectional area of ​​the first passage (110) and the second passage (210) other than the communication opening, at least a part of the first passage (110) is installed so that the cross-sectional area gradually decreases in the direction toward the second passage (210), the communication point between the first passage (110) and the second passage (210) is connected to the residual water outlet via a water guide passage (120), and the dishwasher includes a drainage device and a residual water removal device (10). Residual water remaining in the home appliance is quickly, effectively and completely removed, preventing the proliferation of bacteria and the generation of unpleasant odors, and improving the user experience.

Description

[Technical Field]

[0001] This application claims priority to Chinese patent applications bearing application numbers 202110520920.6 and 202121015411.X, filed on May 12, 2021, the entire contents of which are incorporated herein by reference.

[0002] The present application relates to the technical field of household appliances, in particular to residual water removal devices and dishwashers. [Background technology]

[0003] As people's living standards continue to improve, people's demands for the drying performance of household dishwashers are becoming increasingly higher. Currently, all dishwashers on the market have a residual water problem, namely, the water in the tray at the bottom of the dishwasher cannot be completely drained out of the dishwasher. If water remains in the bottom of the tray for a long time, bacteria will grow inside the dishwasher, causing unpleasant odors and seriously affecting the user experience.

[0004] Currently, there are residual water removal devices designed based on the Venturi theory, in which one end of the device is connected to pressurized tap water, the other end to a drain pipe, and the middle part is connected to the residual water in the tray. When tap water is supplied into the device, negative pressure is generated in the middle part, which sucks the residual water into the chamber and then discharges it together with the tap water through the drain pipe to the outside of the dishwasher. The Venturi device of existing residual water removal devices is installed as a single unit, which makes the manufacturing process of the residual water removal device complicated and increases manufacturing costs, and it is difficult for a single unit Venturi device to meet the efficiency requirements for residual water removal.

[0005] The above content is only used to assist in understanding the technical solution of the invention, and does not mean that the above content is admitted as prior art. Summary of the Invention [Problem to be solved by the invention]

[0006] The main object of the present application is to propose a residual water removal device aimed at solving at least one of the above technical problems. [Means for solving the problem]

[0007] In order to achieve the above-mentioned object, the residual water removal device proposed in this application includes a water supply body having a first passage formed therein, and a drainage body connected to the water supply body and having a second passage formed therein, the first passage communicating with the second passage, the first passage having a communication port communicating with the second passage, the area of ​​the communication port being less than the cross-sectional area of ​​the first passage and the part of the second passage other than the communication port, at least a part of the first passage being installed so that the cross-section gradually decreases in the direction toward the second passage, and the communication point between the first passage and the second passage is connected to a residual water outlet via a water conduction passage.

[0008] In one embodiment, one of the water supply body and the drainage body is provided with a central insertion shaft, and the other is provided with a central insertion hole that fits the central insertion shaft.

[0009] In one embodiment, a first sealing layer is coated on the outer periphery of the joint between the water supply body and the drainage body.

[0010] In one embodiment, the first sealing layer is injection molded around the outer periphery of the joint between the water supply body and the drainage body.

[0011] In one embodiment, a first restriction portion is provided at one end of the water supply body close to the drainage body, a second restriction portion is provided at one end of the drainage body close to the water supply body, and the first sealing layer includes a first fitting portion that fits the first restriction portion and the second restriction portion.

[0012] In one embodiment, the first restriction portion includes a first annular groove opened in the peripheral wall of the water supply body, the second restriction portion includes a second annular groove opened in the peripheral wall of the drainage body, the first fitting portion includes a first annular boss fitted into the first annular groove and a second annular boss fitted into the second annular groove, and the first sealing layer further includes a first sealing ring connecting the first annular boss and the second annular boss.

[0013] In one embodiment, the first sealing layer is made of a plastic material.

[0014] In one embodiment, the residual water removal device further includes a water supply fitting, which is sealed and connected to one end of the water supply body away from the drainage body, and a water supply passage communicating with the first passage is formed in the water supply fitting, and a first check valve is installed in the water supply passage, and the first check valve is unidirectionally connected from the water supply passage to the first passage.

[0015] In one embodiment, a first limiting post is installed on one end surface of the water supply joint and the water supply body, and a first limiting slot is installed on the other end surface, and the first limiting post and the first limiting slot are fitted together.

[0016] In one embodiment, the water supply joint and the water supply body are connected to each other, and a second sealing layer is coated on the outer periphery of the connection point between the water supply body and the water supply joint.

[0017] In one embodiment, the second sealing layer is injection molded around the outer periphery of the joint between the water supply body and the water supply joint.

[0018] In one embodiment, the residual water removal device further includes a drain fitting, which is sealed and connected to one end of the drain body away from the water supply body, and a drain passage communicating with the second passage is formed in the drain fitting, and a second check valve is installed in the drain passage, and the second check valve is unidirectionally connected from the second passage to the drain passage.

[0019] In one embodiment, the drain joint and the drain body are connected to each other, and a third sealing layer is coated on the outer periphery of the connection point between the drain body and the drain joint.

[0020] In one embodiment, the third sealing layer is injection molded around the outer periphery of the connection point between the drain body and the drain joint.

[0021] In one embodiment, the residual water removal device further includes a throat portion, the throat portion is connected to the water supply body, a throat passage communicating with the water outlet end of the first passage is formed inside the throat portion, the cross-sectional area of ​​the throat passage is smaller than the cross-sectional areas of the first passage and the second passage, an annular chamber is formed around the throat portion, the throat passage is connected to the second passage through the annular chamber, and the annular chamber is connected to the water guide passage.

[0022] In one embodiment, the annular chamber is disposed within the water supply body, and / or the annular chamber includes a tapered section disposed such that the inner diameter gradually decreases from the first passage toward the second passage.

[0023] The dishwasher proposed in this application includes a drainage device including a tray with a water supply inlet and a residual water outlet, and a residual water removal device including a water supply body and a drainage body, wherein a first passage is formed inside the water supply body, the drainage body is connected to the water supply body, a second passage is formed inside the drainage body, the first passage is connected to the second passage, and the first passage has a communication port communicating with the second passage, the area of ​​the communication port is less than the cross-sectional area of ​​the first passage and the second passage other than the communication port, at least a part of the first passage is installed so that the cross-section gradually decreases in the direction toward the second passage, the communication point between the first passage and the second passage is connected to the residual water outlet via a water conveying passage, the residual water removal device is connected to the water supply inlet by the water supply body, and the communication point between the first passage and the second passage of the residual water removal device is connected to the residual water outlet via a water conveying passage. [Effects of the Invention]

[0024] In the residual water removal device of the present application, the first passage of the water supply body and the second passage of the drain body form a Venturi tube structure. The first passage is connected to pressurized tap water, and the second passage is connected to a drain pipe. The connection between the first and second passages is connected to a residual water outlet via a water conduit. When tap water flows from the first passage to the second passage, negative pressure is generated at the connection between the first and second passages. The negative pressure causes residual water flowing out of the residual water outlet to be sucked into the connection between the first and second passages via the water conduit. The residual water and tap water then flow through the second passage to the drain pipe and are discharged outside the home appliance. In this way, residual water remaining in the home appliance is quickly, effectively, and completely removed, preventing bacterial growth and unpleasant odors and improving the user experience. Furthermore, compared to a system that removes residual water using a combination of a water pump and a heater, this device has a simpler configuration, no risk of clogging the water pump, and higher residual water removal efficiency and safety.

[0025] In addition, by installing the water supply body and the drainage body separately, the difficulty of integrally molding the water supply body and the drainage body can be reduced, the molding process can be simplified, and manufacturing costs can be reduced. Meanwhile, the internal structure of the water supply body and / or the drainage body can be designed more complexly, so that by designing the internal passages of the water supply body and / or the drainage body and further designing the structure (for example, by installing an annular chamber at the connection point between the water supply body and the drainage body), the suction effect of the residual water removal device can be improved, the residual water storage capacity of the residual water removal device can be increased, and the residual water adsorption efficiency and effect of the residual water removal device can be effectively improved. [Brief explanation of the drawings]

[0026] In order to more clearly explain the technical solutions of the embodiments of the present application or the prior art, the following will briefly describe the necessary drawings used in the description of the embodiments or the prior art. The following drawings are only some embodiments of the present application, and it is also obvious to those skilled in the art that they can obtain other related drawings based on the configurations shown in these drawings without any creative efforts.

[0027] [Figure 1] 1 is a structural schematic diagram of one embodiment of a residual water removal device of the present application. [Figure 2] FIG. 2 is a partial enlarged view of part A in FIG. [Figure 3] FIG. 2 is an exploded structural schematic diagram of the residual water removal device in FIG. [Figure 4] FIG. 4 is a structural schematic diagram of a portion of the water supply body and the drainage body in FIG. 3. [Figure 5] FIG. 4 is a structural schematic diagram of the water supply joint portion in FIG. 3. [Figure 6] FIG. 4 is a structural schematic diagram of the drainage joint portion in FIG. 3. [Explanation of symbols]

[0028] 10 Residual water removal device 100 Water supply body 110 1st aisle 111 Water supply end 112 Demizuenda 120 Waterway 130 First Restriction Section 140 Central insertion hole 150 Fourth Restriction 160 First Restriction Post 170 Annular Chamber 171 Decreasing Section 200 Drainage body 210 2nd aisle 220 Second Restriction Section 230 Central insertion shaft 240 6th Restriction Section 250 Second Restriction Post 300 Water supply joint 310 Water supply passage 320 Third Restriction Section 330 1st Limited Slot 400 Drainage fitting 410 Drain passage 420 5th Restriction 430 Second Limited Slot 510 First sealing layer 511 First fitting part 512 First seal ring 520 Second sealing layer 521 Second fitting part 522 Second seal ring 530 Third sealing layer 531 Third fitting part 532 3rd seal ring 600 First check valve 700 Second check valve 800 Throat 810 Throat passage

[0029] The realization of the object, the function features and advantages of the present application will be further explained in combination with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION OF THE INVENTION

[0030] It should be noted that in the examples of this application, when references to "first," "second," etc. are made, the references to "first," "second," etc. are used for descriptive purposes only and cannot be understood as indicating or implying their relative importance or as implicitly specifying the number of technical features shown. Therefore, features defined by "first" and "second" can explicitly or implicitly include at least one of the features. Note that "and / or" in the entire text means that three parallel options are included. For example, "A and / or B" means that option A, option B, or both A and B are simultaneously satisfied.

[0031] The present application proposes a residual water removal device for home appliances, which may be electrical appliances that need to remove residual water, such as dishwashers, washing machines, etc.

[0032] In an embodiment of the present application, as shown in Figures 1 to 3, the residual water removal device 10 includes a water supply body 100 and a drainage body 200. A first passage 110 is formed inside the water supply body 100, and the drainage body 200 and the water supply body 100 are connected to each other, and a second passage 210 is formed inside the drainage body 200. The first passage 110 communicates with the second passage 210, and the first passage 110 has a communication port communicating with the second passage 210, the area of ​​the communication port being equal to or smaller than the cross-sectional area of ​​the first passage 110 and the second passage 210 other than the communication ports, and at least a portion of the first passage 110 is installed so that the cross-sectional area gradually decreases in the direction toward the second passage 210, and the communication point between the first passage 110 and the second passage 210 is connected to a residual water outlet via a water guide passage 120.

[0033] In this embodiment, the water supply body 100 is for communicating with the water supply pipe. The water supply body 100 may be directly connected to the water supply pipe or indirectly connected to the water supply pipe via a component such as the water supply joint 300. The drainage body 200 is for communicating with the drain pipe. The drainage body 200 may be directly connected to the drain pipe or indirectly connected to the drain pipe via a component such as the drain joint 400. The drain pipe may be a drain pipe connected to the drain outlet of the home appliance or a separately installed drain pipe. The water conveying passage 120 may be directly connected to the residual water outlet or may be connected to the residual water outlet via a component such as a water conveying pipe. As long as the water conveying passage 120 communicates with the connection point between the first passage 110 and the second passage 210, the water conveying passage 120 may be formed by an inner chamber of the water conveying pipe or may be a passage opened in the water supply joint 300 or the drainage joint 400. Optionally, for ease of processing, the water supply body 100 and the drainage body 200 are installed in a tubular shape as a whole. Of course, the water supply body 100 and the drainage body 200 can also be installed in other shapes, and the shapes of the water supply body 100 and the drainage body 200 can be selected and designed according to actual needs, and are not particularly limited here.

[0034] The water supply body 100 and the drainage body 200 are connected to each other, specifically, the ends of the water supply body 100 and the drainage body 200 are connected to each other at opposite ends. Specifically, the water supply body 100 and the drainage body 200 can be connected to each other by inserting a plug structure or a restricting structure. Of course, in some embodiments, the ends of the water supply body 100 and the drainage body 200 can also be connected to each other. By installing the water supply body 100 and the drainage body 200 separately, the difficulty of integrally molding the water supply body 100 and the drainage body 200 is reduced, the molding process can be simplified, and manufacturing costs can be reduced. Meanwhile, the internal structure of the water supply body 100 and / or the drainage body 200 can be designed more complexly. By designing the internal passages between the water supply body 100 and the drainage body 200 and further designing the structure (for example, by installing an annular chamber at the connection point between the water supply body 100 and the drainage body 200), the suction effect of the residual water removal device can be improved, the residual water storage capacity of the residual water removal device 10 can be increased, and the residual water adsorption efficiency and effect of the residual water removal device 10 can be effectively improved.

[0035] The first passage 110 is arranged to penetrate the water supply body 100 along its axial direction, and the second passage 210 is arranged to penetrate the drainage body 200 along its axial direction. To reduce fluid resistance, the cross sections of the first passage 110 and the second passage 210 may be circular, or the first passage 110 and the second passage 210 may be arranged coaxially. The first passage 110 and the second passage 210 are connected to each other, and are directly connected to each other and communicate with each other, with the communication point between the first passage 110 and the second passage 210 being a throat. The first passage 110 and the second passage 210 may also be connected to each other via a throat passage 810. The throat passage 810 may be formed in the water supply body 100 or in the drainage body 200.

[0036] The water supply end 111 of the first passage 110 is an end remote from the second passage 210, and the water outlet end 112 of the first passage 110 is an end close to the second passage 210. By making the area of ​​the communication port of the first passage 110 smaller than the cross-sectional areas of the portions of the first passage 110 and the second passage 210 other than the communication ports, the cross-sectional area of ​​the first passage 110 is gradually reduced from the water supply end 111 toward the second passage 210, and the first passage 110 and the second passage 210 form a Venturi tube structure. The cross-sectional area of ​​the second passage 210 may be gradually increased from the end close to the first passage 110 toward the end remote from the first passage 110, or the cross-sectional area of ​​the first passage 110 may be uniform in the axial direction. The first passage 110 is connected to a pressurized tap water source, the second passage 210 to a drain pipe, and the connection between the first passage 110 and the second passage 210 is connected to a residual water outlet via a water conduit 120. As tap water flows from the first passage 110 to the second passage 210, a negative pressure is generated at the connection between the first passage 110 and the second passage 210. The negative pressure causes residual water flowing out of the residual water outlet to be sucked into the connection between the first passage 110 and the second passage 210 via the water conduit 120. The residual water and the tap water then flow to the drain pipe via the second passage 210 and are discharged outside the appliance. In this way, residual water remaining in the appliance is quickly, effectively, and completely removed, preventing bacterial growth and unpleasant odors and improving the user experience. Furthermore, compared to a system that removes residual water using a combination of a water pump and a heater, this device has a simpler configuration, is less susceptible to clogging of the water pump, and provides more efficient and safe residual water removal.

[0037] In the residual water removal device 10 of the present application, the first passage 110 of the water supply body 100 and the second passage 210 of the drain body 200 form a Venturi tube structure. The first passage 110 is connected to pressurized tap water, the second passage 210 is connected to a drain pipe, and the connection between the first passage 110 and the second passage 210 is connected to a residual water outlet via a water conduit passage 120. When tap water flows from the first passage 110 to the second passage 210, negative pressure is generated at the connection between the first passage 110 and the second passage 210. The negative pressure causes residual water flowing out of the residual water outlet to be sucked into the connection between the first passage 110 and the second passage 210 via the water conduit passage 120. The residual water and tap water then flow into the drain pipe via the second passage 210 and are discharged to the outside of the home appliance. In this way, residual water remaining in the home appliance is quickly, effectively, and completely removed, preventing bacterial growth and unpleasant odors and improving the user experience. Furthermore, compared to configurations that remove residual water by combining a water pump and heater, this device has a simpler configuration, there is no risk of the water pump clogging, and it is possible to remove residual water more efficiently and safely.

[0038] In addition, by installing the water supply body 100 and the drainage body 200 separately, the difficulty of integrally molding the water supply body 100 and the drainage body 200 is reduced, the molding process can be simplified, and manufacturing costs can be reduced. Meanwhile, the internal structure of the water supply body 100 and / or the drainage body 200 can be designed more complexly, so that by designing the internal passage between the water supply body 100 and the drainage body 200 and further designing the structure (for example, by installing an annular chamber at the connection point between the water supply body 100 and the drainage body 200), the suction effect of the residual water removal device can be improved, the residual water storage capacity of the residual water removal device 10 can be increased, and the residual water adsorption efficiency and effect of the residual water removal device 10 can be effectively improved.

[0039] In one embodiment, as shown in Figures 1 to 4, a central insertion shaft 230 is installed on one of the water supply body 100 and the drainage body 200, and a central insertion hole 140 that fits the central insertion shaft 230 is installed on the other.

[0040] In this embodiment, specifically, the central insertion shaft 230 is installed in the center of one end surface of the water supply body 100 and the drainage body 200. By fitting the central insertion shaft 230 into the central insertion hole 140, the water supply body 100 and the drainage body 200 are temporarily fixed together, ensuring the concentricity of the water supply body 100 and the drainage body 200, and thus making it easier to cover the outer periphery of the joint between the water supply body 100 and the drainage body 200 with the first sealing layer 510. Optionally, if the central insertion shaft 230 is tightly fitted into the central insertion hole 140, the stability of the connection between the water supply body 100 and the drainage body 200 when temporarily fixed can be guaranteed.

[0041] In one embodiment, a first sealing layer 510 is coated on the outer periphery of the joint between the water supply body 100 and the drainage body 200 .

[0042] When the first sealing layer 510 is coated on the outer periphery of the joint between the water supply main body 100 and the drainage main body 200, the first sealing layer 510 may be fitted onto the outer periphery of the joint between the water supply main body 100 and the drainage main body 200, or may be adhered to the outer periphery of the joint between the water supply main body 100 and the drainage main body 200, or may be injection molded onto the outer periphery of the joint between the water supply main body 100 and the drainage main body 200. Here, the manner of connection between the first sealing layer and the water supply main body 100 and the drainage main body 200 is not limited, and the first sealing layer 510 may simply coat the outer periphery of the joint between the water supply main body 100 and the drainage main body 200 so as to seal the joint between the water supply main body 100 and the drainage main body 200. The material of the first sealing layer 510 can be selected and limited as needed, for example, the first sealing layer 510 can be made of a rubber material, in which case the first sealing layer 510 can cover the outer periphery of the joint between the water supply body 100 and the drainage body 200 by bonding, wrapping, fitting, etc. The first sealing layer 510 can also be made of a plastic material, in which case the first sealing layer 510 can cover the outer periphery of the joint between the water supply body 100 and the drainage body 200 by injection molding.

[0043] In addition, by covering the outer periphery of the joint between the water supply body 100 and the drainage body 200 with the first sealing layer 510 and installing a sealing member on the end face of the water supply body 100 and the drainage body 200, a seal is realized at the joint between the water supply body 100 and the drainage body 200, and the joint between the water supply body 100 and the drainage body 200 can be performed, the pressure resistance strength of the joint between the water supply body 100 and the drainage body 200 can be increased, and the seal can be maintained to prevent water leakage even under high pressure. In addition, by ultrasonically welding the water supply body 100 and the drainage body 200, it is easier to ensure the consistency of the connection between the water supply body 100 and the drainage body 200, reducing the risk of water intrusion and ultimately improving the overall sealing effect of the residual water removal device 10.

[0044] Furthermore, referring to FIGS. 1 and 2, a first sealing layer 510 is injection molded around the outer periphery of the joint between the water supply body 100 and the drainage body 200.

[0045] In this embodiment, a first sealing layer 510 is injection molded around the outer periphery of the joint between the water supply body 100 and the drainage body 200, thereby coating the joint between the water supply body 100 and the drainage body 200 with an adhesive. Specifically, the first sealing layer 510 is an adhesive-coated ring. Optionally, the first sealing layer 510 is made of a plastic material. Specific examples of such plastic materials include polypropylene (PP) and polyethylene (PE). The thickness and width of the first sealing layer 510 are not specifically limited herein and can be selected and designed according to actual needs. By injection molding the first sealing layer 510 around the outer periphery of the joint between the water supply body 100 and the drainage body 200, not only is the joint between the water supply body 100 and the drainage body 200 sealed, but the water supply body 100 and the drainage body 200 are also connected through an injection molding process, eliminating the need for any additional structure to connect the water supply body 100 and the drainage body 200, resulting in excellent sealing performance and connection reliability. That is, the connection between the water supply body 100 and the drainage body 200 has high pressure resistance and can be sealed to prevent water leakage even under high pressure. By sealing the water supply body 100 and the drainage body 200 using a conventional sealing ring method, the device is simple and reliable, the number of parts of the device is reduced, the assembly process is simplified, and the risk of water leakage during long-term use is reduced. In addition, by ultrasonically welding the water supply body 100 and the drainage body 200, it is easy to ensure the consistency of the connection between the water supply body 100 and the drainage body 200, and the risk of water intrusion can be reduced.

[0046] In one embodiment, as shown in FIG. 2, a first restriction portion 130 is installed at one end of the water supply body 100 close to the drainage body 200, and a second restriction portion 220 is installed at one end of the drainage body 200 close to the water supply body 100, and the first sealing layer 510 includes a first fitting portion 511 that fits the first restriction portion 130 and the second restriction portion 220.

[0047] In this embodiment, the first restricting portion 130 may specifically include a groove and / or a protrusion provided on the peripheral wall of the water supply body 100. The number of the groove and the protrusion may be one or more. The multiple grooves and protrusions may be provided at intervals in the axial direction of the water supply body 100, or may be provided at intervals in the circumferential direction of the water supply body 100. Similarly, the second restricting portion 220 may specifically include a groove and / or a protrusion provided on the peripheral wall of the drainage body 200. The number of the groove and the protrusion may be one or more. The multiple grooves and protrusions may be provided at intervals in the axial direction of the drainage body 200, or may be provided at intervals in the circumferential direction of the drainage body 200. The first fitting portion 511 specifically includes a groove / protrusion that fits the protrusion / groove. A first restriction portion 130 is installed on the water supply body 100, a second restriction portion 220 is installed on the drainage body 200, and the first sealing layer 510 includes a first fitting portion 511 that fits the first restriction portion 130 and the second restriction portion 220. This makes it easier for the first sealing layer 510 to be injection molded at the joint between the water supply body 100 and the drainage body 200, while increasing the contact area between the first sealing layer 510 and the water supply body 100 and the drainage body 200, ensuring that the connection between the first sealing layer 510 and the water supply body 100 and the drainage body 200 is tight and stable. At the same time, the first restriction portion 130, the second restriction portion 220 and the first fitting portion 511 can provide structural sealing and multiple sealing, further improving the sealing effect of the first sealing layer 510 on the water supply body 100 and the drainage body 200.

[0048] Further, referring to Figures 1 to 4, the first restriction portion 130 includes a first annular groove opened in the peripheral wall of the water supply body 100, the second restriction portion 220 includes a second annular groove opened in the peripheral wall of the drainage body 200, the first fitting portion 511 includes a first annular boss fitted into the first annular groove and a second annular boss fitted into the second annular groove, and the first sealing layer 510 further includes a first sealing ring 512 connecting the first annular boss and the second annular boss.

[0049] In this embodiment, to ensure the connection sealing performance of the first sealing layer 510 to the water supply body 100 and the drainage body 200, the water supply body 100 and the drainage body 200 usually have the same outer diameter, and are installed coaxially. The depth of the opened first annular groove and the depth of the opened second annular groove can be the same. The number of first annular grooves and second annular grooves may be one or more. If there are multiple first annular grooves and multiple second annular grooves, the multiple first annular grooves and multiple second annular grooves are arranged at intervals in the axial direction of the water supply body 100.

[0050] The first restricting portion 130 includes a first annular groove formed in the peripheral wall of the water supply body 100, and the second restricting portion 220 includes a second annular groove formed in the peripheral wall of the drainage body 200, with the first and second annular grooves forming an adhesive receiving groove. When the first sealing layer 510 is injection molded around the outer periphery of the joint between the water supply body 100 and the drainage body 200, the molten sealant is evenly filled into the first and second annular grooves, forming a first annular boss and a second annular boss, respectively, and forming a first seal ring 512 connecting the first and second annular bosses. This configuration strengthens the connection between the water supply body 100 and the drainage body 200, improving the sealing effect between them, while also ensuring coaxiality between the water supply body 100 and the drainage body 200. This ensures the dimensional accuracy of the entire device after adhesive coating and reduces the risk of water leakage.

[0051] In practice, the procedure for connecting the water supply body 100 and the drainage body 200 can be as follows.

[0052] First, the water supply body 100 and the drainage body 200 are inserted into each other.

[0053] Next, the inserted water supply body 100 and drainage body 200 are placed into the cavity of an adhesive-coated mold.

[0054] Again, the adhesive coating material is filled into the annular grooves of the water supply body 100 and the drainage body 200, and the liquid adhesive coating material is injected into the cavity of the adhesive coating mold so as to cover the surface of the insertion point between the water supply body 100 and the drainage body 200 and form an adhesive coating layer (first sealing layer 510).

[0055] Finally, after the adhesive coating layer is formed, the connected water supply body 100 and drainage body 200 are taken out.

[0056] In one embodiment, referring to Figures 1, 3 and 5, the residual water removal device 10 further includes a water supply fitting 300, which is sealed and connected to one end of the water supply body 100 away from the drainage body 200, and a water supply passage 310 communicating with the first passage 110 is formed within the water supply fitting 300, and a first check valve 600 is installed within the water supply passage 310, and the first check valve 600 is unidirectionally connected from the water supply passage 310 to the first passage 110.

[0057] In this embodiment, the water supply fitting 300 is specifically tubular. Of course, the water supply fitting 300 may have other shapes. The water supply passage 310 is installed axially through the water supply fitting 300, with one end connected to the water supply body 100 and the other end connected to a water pipe. To reduce fluid resistance, the cross sections of the first passage 110 and the water supply passage 310 may be circular, or the first passage 110 and the water supply passage 310 may be coaxial. There are many methods for sealing the water supply fitting 300 and the water supply body 100, such as sealing with a sealing ring, sealing with adhesive, or adhesive coating, and these methods will not be detailed here. Specifically, the first check valve 600 may be installed at one end of the water supply passage 310 near the first passage 110. The first check valve 600 may have a wide variety of configurations, but as long as it achieves one-way conduction from the water supply passage 310 to the first passage 110 and prevents water in the first passage 110 from returning to the water supply passage 310, there are no specific limitations on the configuration of the first check valve 600 here. Installing the water supply joint 300 and the water supply body 100 separately makes it easy to install the first check valve 600 within the water supply joint 300. Integrating the first check valve 600 within the water supply joint 300 makes installation easier than installing the first check valve 600 within the water supply pipe, and also allows for a high degree of integration of the residual water removal device 10, making the overall structure more compact and advantageous for modular production.

[0058] In one embodiment, referring to Figures 3 to 5, a first restriction post 160 is installed on one end face of the water supply fitting 300 and the water supply body 100, and a first restriction slot 330 is installed on the other end face, and the first restriction post 160 and the first restriction slot 330 are fitted together.

[0059] In this embodiment, the number of first restrictor posts 160 may be one or more. When there is one first restrictor post 160, the first restrictor post 160 may be installed in the center of the end face of the water supply fitting 300 or the water supply body 100, or may be installed in a position close to the periphery of the end face. When there are multiple first restrictor posts 160, multiple first restrictor posts 160 may be installed at intervals around the circumferential direction of the water supply body 100. In one embodiment, multiple first restrictor posts 160 are installed on the end face of the water supply body 100, and the multiple first restrictor posts 160 are installed at intervals around the circumferential direction of the water supply body 100. By fitting the first limiting post 160 into the first limiting slot 330, the water supply body 100 and the water supply joint 300 are temporarily fixed, ensuring the concentricity of the water supply body 100 and the drainage body 200, and thus making it easier to cover the outer periphery of the joint between the water supply body 100 and the water supply joint 300 with the second sealing layer 520. Optionally, if the first limiting post 160 is tightly fitted into the first limiting slot 330, the stability of the connection between the water supply body 100 and the water supply joint 300 when temporarily fixed can be guaranteed.

[0060] In addition to the above embodiment, as shown in Figures 1 and 3, the water supply fitting 300 and the water supply body 100 are connected to each other, and a second sealing layer 520 is coated on the outer periphery of the connection point between the water supply body 100 and the water supply fitting 300.

[0061] In this embodiment, the water supply joint 300 and the water supply body 100 are connected to each other, specifically, the ends of the water supply joint 300 and the water supply body 100 are connected facing each other. When the second sealing layer 520 is coated on the outer periphery of the joint between the water supply body 100 and the water supply joint 300, the second sealing layer 520 may be fitted onto the outer periphery of the joint between the water supply body 100 and the water supply joint 300, may be glued onto the outer periphery of the joint between the water supply body 100 and the water supply joint 300, or may be injection molded onto the outer periphery of the joint between the water supply body 100 and the water supply joint 300. Here, the manner of connection between the second sealing layer 520 and the water supply body 100 and the water supply joint 300 is not limited, and the second sealing layer 520 need only cover the outer periphery of the joint between the water supply body 100 and the water supply joint 300 so as to seal the joint between the water supply body 100 and the water supply joint 300. The material of the second sealing layer 520 can be selected and limited as needed, for example, the second sealing layer 520 may be made of a rubber material, in which case the second sealing layer 520 can cover the outer periphery of the joint between the water supply body 100 and the drainage body 200 by bonding, wrapping, fitting, or the like. The second sealing layer 520 may be made of a plastic material, in which case the second sealing layer 520 can cover the outer periphery of the joint between the water supply body 100 and the water supply joint 300 by injection molding.

[0062] By covering the outer periphery of the joint between the water supply body 100 and the water supply joint 300 with the second sealing layer 520 and installing a sealing member on the end face of the water supply body 100 and the water supply joint 300, a seal is achieved at the joint between the water supply body 100 and the water supply joint 300, and the joint between the water supply body 100 and the water supply joint 300 is also functioned, which increases the pressure resistance of the joint between the water supply body 100 and the water supply joint 300 and maintains a seal to prevent water leakage even under high pressure. In addition, ultrasonic welding between the water supply body 100 and the water supply joint 300 makes it easier to ensure the consistency of the connection between the water supply body 100 and the water supply joint 300, reducing the risk of water intrusion and ultimately improving the overall sealing effect of the residual water removal device 10.

[0063] In one embodiment, referring also to FIG. 5, a second sealing layer 520 is injection molded around the outer periphery of the joint between the water supply body 100 and the water supply joint 300 .

[0064] In this embodiment, a second sealing layer 520 is injection molded around the outer periphery of the joint between the water supply body 100 and the water supply joint 300, thereby coating the joint between the water supply body 100 and the water supply joint 300 with an adhesive. Specifically, the second sealing layer 520 is an adhesive-coated ring. Optionally, the second sealing layer 520 is made of a plastic material. Specific examples of plastic materials include polypropylene (PP) and polyethylene (PE). The thickness and width of the second sealing layer 520 are not specifically limited herein and can be selected and designed according to actual needs. By injection molding the second sealing layer 520 around the outer periphery of the joint between the water supply body 100 and the water supply joint 300, not only is a seal between the water supply body 100 and the water supply joint 300 achieved, but because the water supply body 100 and the water supply joint 300 are connected through the injection molding process, there is no need to provide any additional structure to connect the water supply body 100 and the drainage body 200, resulting in good sealing and connection reliability. In other words, the joint between the water supply body 100 and the water supply joint 300 has high pressure resistance and can maintain a seal to prevent water leakage even under high pressure. Sealing the water supply body 100 and the water supply joint 300 using a conventional sealing ring method makes the device simple and reliable, reduces the number of device parts, simplifies the assembly process, and reduces the risk of water leakage during long-term use. Furthermore, by ultrasonically welding the water supply body 100 and the water supply joint 300 together, it is easier to ensure consistency in the connection between the water supply body 100 and the water supply joint 300, thereby reducing the risk of water ingress.

[0065] In one embodiment, as shown in Figures 1, 3 and 5, a third restriction portion 320 is installed at one end of the water supply fitting 300 closer to the water supply body 100, a fourth restriction portion 150 is installed at one end of the water supply body 100 closer to the water supply fitting 300, and the second sealing layer 520 includes a second fitting portion 521 that fits the second restriction portion and the third restriction portion 320.

[0066] In this embodiment, the third restricting portion 320 may specifically include a groove and / or a protrusion provided on the peripheral wall of the water supply joint 300. The number of the groove and the protrusion may be one or more. The multiple grooves and protrusions may be provided at intervals in the axial direction of the water supply joint 300 or at intervals in the circumferential direction of the water supply joint 300. Similarly, the fourth restricting portion 150 may specifically include a groove and / or a protrusion provided on the peripheral wall of the water supply body 100. The number of the groove and the protrusion may be one or more. The multiple grooves and protrusions may be provided at intervals in the axial direction of the water supply body 100 or at intervals in the circumferential direction of the water supply body 100. The second fitting portion 521 specifically includes a groove / protrusion that fits the protrusion / groove. The water supply joint 300 is provided with a third restriction portion 320, the water supply body 100 is provided with a fourth restriction portion 150, and the second sealing layer 520 includes a second fitting portion 521 that fits the third restriction portion 320 and the fourth restriction portion 150. This makes it easier for the second sealing layer 520 to be injection molded at the joint between the water supply body 100 and the water supply joint 300, while increasing the contact area between the second sealing layer 520 and the water supply body 100 and the water supply joint 300, ensuring that the connection between the second sealing layer 520 and the water supply body 100 and the water supply joint 300 is tight and stable. At the same time, the third restriction portion 320, the fourth restriction portion 150 and the second fitting portion 521 can provide structural sealing and multiple sealing, further improving the sealing effect of the second sealing layer 520 on the water supply body 100 and the water supply joint 300.

[0067] Furthermore, the third restriction portion 320 includes a third annular groove opened in the peripheral wall of the water supply fitting 300, the fourth restriction portion 150 includes a fourth annular groove opened in the peripheral wall of the water supply body 100, the second fitting portion 521 includes a third annular boss fitted into the third annular groove and a fourth annular boss fitted into the fourth annular groove, and the second sealing layer 520 further includes a second sealing ring 522 connecting the third annular boss and the fourth annular boss.

[0068] In this embodiment, to ensure the connection sealing of the second sealing layer 520 to the water supply body 100 and the water supply joint 300, the water supply body 100 and the water supply joint 300 are typically installed coaxially. The depth of the opened third annular groove and the depth of the opened fourth annular groove can be the same. The number of the third annular groove and the fourth annular groove may be one or more. If there are multiple third annular grooves and multiple fourth annular grooves, the multiple third annular grooves and multiple fourth annular grooves are installed at intervals in the axial direction of the water supply body 100.

[0069] The third restricting portion 320 includes a third annular groove formed in the peripheral wall of the water supply joint 300, and the fourth restricting portion 150 includes a fourth annular groove formed in the peripheral wall of the water supply body 100, whereby the third and fourth annular grooves form an adhesive receiving groove. When the second sealing layer 520 is injection molded around the outer periphery of the joint between the water supply body 100 and the water supply joint 300, the molten sealant is evenly filled into the third and fourth annular grooves, thereby forming the third and fourth annular bosses, respectively, and forming the second sealing ring 522 connecting the third and fourth annular bosses. This configuration strengthens the connection between the water supply body 100 and the water supply joint 300, improving the sealing effect between them, while also ensuring the concentricity of the water supply body 100 and the water supply joint 300. This ensures the dimensional accuracy of the entire device after adhesive coating and reduces the risk of water leakage.

[0070] In practice, the procedure for connecting the water supply joint 300 and the water supply main body 100 can be as follows.

[0071] First, the water supply joint 300 and the water supply body 100 are inserted into each other.

[0072] Next, the inserted water supply body 100 and water supply joint 300 are placed into the cavity of an adhesive coating mold.

[0073] Again, the adhesive coating material is filled into the annular groove between the water supply fitting 300 and the water supply body 100, and the liquid adhesive coating material is injected into the cavity of the adhesive coating mold so as to cover the surface of the insertion point between the water supply fitting 300 and the water supply body 100 and form an adhesive coating layer.

[0074] Finally, after the adhesive coating layer is formed, the connected water supply joint 300 and water supply body 100 are removed.

[0075] It is understood that the process of inserting the water feed fitting 300 and the water feed body 100 into one another can be performed before the process of placing the inserted water feed body 100 and the drainage body 200 into the cavity of the adhesive coating mold. That is, after the three components of the water feed fitting 300, the water feed body 100, and the drainage body 200 are inserted into one another, the inserted water feed fitting 300, the water feed body 100, and the drainage body 200 can be placed together in the adhesive coating mold to perform the adhesive coating process. Of course, the process of inserting the water feed fitting 300 and the water feed body 100 into one another can also be performed after the process of forming the adhesive coating layer and then removing the connected water feed body 100 and the drainage body 200. That is, the water feed body 100 and the drainage body 200 are adhesive-coated and connected, and then the water feed body 100 and the water feed fitting 300 are adhesive-coated and connected.

[0076] In one embodiment, as shown in Figures 1, 3 and 6, the residual water removal device 10 further includes a drain fitting 400, which is sealed and connected to one end of the drain body 200 away from the water supply body 100, and a drain passage 410 communicating with the second passage 210 is formed within the drain fitting 400, and a second check valve 700 is installed within the drain passage 410, and the second check valve 700 is unidirectionally connected from the second passage 210 to the drain passage 410.

[0077] In this embodiment, the drain fitting 400 is specifically tubular. Of course, the drain fitting 400 may have other shapes. The drain passage 410 is installed axially through the drain fitting 400, with one end connected to the drain body 200 and the other end connected to a drain pipe. To reduce fluid resistance, the cross sections of the second passage 210 and the drain passage 410 may be circular, or the second passage 210 and the drain passage 410 may be coaxial. There are various methods for sealing the drain fitting 400 and the drain body 200, such as sealing with a sealing ring, sealing with a sealing adhesive, or sealing with an adhesive coating, and these methods will not be detailed here. Specifically, the second check valve 700 may be installed at one end of the drain passage 410 near the second passage 210. The second check valve 700 may have a wide variety of configurations, but as long as it achieves one-way conduction from the second passage 210 to the drain passage 410 and prevents water in the drain passage 410 from flowing back into the second passage 210, there are no specific limitations on the configuration of the second check valve 700 here. Installing the drain joint 400 and the drain body 200 separately makes it easy to install the second check valve 700 in the drain joint 400. Integrating the second check valve 700 into the drain joint 400 makes it easier to install the second check valve 700 than installing the second check valve 700 in the drain pipe, and also allows for a high degree of integration of the residual water removal device 10, making the overall structure more compact and advantageous for modular production.

[0078] In one embodiment, as shown in Figures 3, 4 and 6, a second limiting post 250 is installed on one end face of the drainage fitting 400 and the drainage body 200, and a second limiting slot 430 is installed on the other end face, and the second limiting post 250 and the second limiting slot 430 are fitted together to limit the relative rotation between the drainage fitting 400 and the drainage body 200.

[0079] In this embodiment, the number of second restriction posts 250 may be one or more. When there is one second restriction post 250, the second restriction post 250 may be installed in the center of the end face of the drainage joint 400 or the drainage body 200, or may be installed in a position close to the periphery of the end face. When there are multiple second restriction posts 250, the multiple second restriction posts 250 can be installed at intervals around the circumferential direction of the drainage body 200. In one embodiment, multiple second restriction posts 250 are installed on the end face of the drainage body 200, and the multiple second restriction posts 250 are installed at intervals around the circumferential direction of the drainage body 200. The engagement of the second limiting post 250 with the second limiting slot 430 temporarily fixes the drain body 200 and the drain joint 400, ensuring the concentricity of the drain body 200 and the drain joint 400, which in turn makes it easier to cover the outer periphery of the connection point between the drain body 200 and the drain joint 400 with the third sealing layer 530. Optionally, if the second limiting post 250 is tightly engaged with the second limiting slot 430, the stability of the connection between the drain body 200 and the drain joint 400 when temporarily fixed can be ensured.

[0080] In addition to the above embodiment, as shown in the figures and 3, the drainage fitting 400 and the drainage body 200 are connected to each other, and a third sealing layer 530 is coated on the outer periphery of the connection point between the drainage body 200 and the drainage fitting 400.

[0081] In this embodiment, the drain joint 400 and the drain body 200 are connected to each other, and specifically, the drain joint 400 and the drain body 200 are connected with their ends facing each other. When the third sealing layer 530 is coated on the outer periphery of the joint between the drain body 200 and the drain joint 400, the third sealing layer 530 may be fitted onto the outer periphery of the joint between the drain body 200 and the drain joint 400, may be bonded to the outer periphery of the joint between the drain body 200 and the drain joint 400, or may be injection molded onto the outer periphery of the joint between the drain body 200 and the drain joint 400. Here, the connection mode between the third sealing layer 530 and the drain body 200 and the drain joint 400 is not limited, and the third sealing layer 530 may simply coat the outer periphery of the joint between the drain body 200 and the drain joint 400 so as to seal the joint between the drain body 200 and the drain joint 400. The material of the third sealing layer 530 can be selected and limited as needed, for example, the third sealing layer 530 may be a rubber material, in which case the third sealing layer 530 can cover the outer periphery of the joint between the drain body 200 and the drain joint 400 by bonding, wrapping, fitting, etc. The third sealing layer 530 may be a plastic material, in which case the third sealing layer 530 can cover the outer periphery of the joint between the drain joint 400 and the drain body 200 by injection molding.

[0082] By covering the outer periphery of the connection point between the drain body 200 and the drain joint 400 with the third sealing layer 530 and installing a sealing member on the end face of the drain body 200 and the drain joint 400, a seal is realized at the connection point between the drain body 200 and the drain joint 400, and the connection function between the drain body 200 and the drain joint 400 can be achieved, the pressure resistance strength of the connection point between the drain body 200 and the drain joint 400 can be increased, and the seal can be maintained to prevent water leakage even under high pressure. In addition, by ultrasonically welding the drain body 200 and the drain joint 400, it is easier to ensure the consistency of the connection between the drain body 200 and the drain joint 400, reducing the risk of water intrusion and ultimately improving the overall sealing effect of the residual water removal device 10.

[0083] In one embodiment, referring also to FIG. 6, a third sealing layer 530 is injection molded around the outer periphery of the connection between the drain body 200 and the drain joint 400 .

[0084] In this embodiment, a third sealing layer 530 is injection molded around the outer periphery of the connection between the drain body 200 and the drain joint 400, thereby coating the connection between the drain body 200 and the drain joint 400 with an adhesive. Specifically, the third sealing layer 530 is an adhesive-coated ring. Alternatively, the third sealing layer 530 may be made of a plastic material. Specific examples of the plastic material include polypropylene (PP) and polyethylene (PE). The thickness and width of the third sealing layer 530 are not limited here and can be selected and designed according to actual needs. By injection molding the third sealing layer 530 around the outer periphery of the connection between the drain body 200 and the drain joint 400, not only is the seal between the drain body 200 and the drain joint 400 achieved, but also the drain body 200 and the drain joint 400 are connected through an injection molding process. Therefore, there is no need to provide any additional structure to connect the water supply body 100 and the drain body 200, and the sealing performance and connection reliability are excellent. That is, the connection between the drain body 200 and the drain joint 400 has high pressure resistance and can maintain a seal to prevent water leakage even under high pressure. By sealing the drain body 200 and the drain joint 400 with a conventional seal ring method, the device is simple and reliable, the number of parts of the device is reduced, the assembly process is simplified, and the risk of water leakage during long-term use is reduced. In addition, by ultrasonically welding the drain body 200 and the drain joint 400, it is easy to ensure the consistency of the connection between the drain body 200 and the drain joint 400, and the risk of water intrusion can be reduced.

[0085] In practice, the procedure for connecting the drain joint 400 and the drain body 200 can be as follows.

[0086] First, the drain joint 400 and the drain body 200 are inserted into each other.

[0087] The inserted drain body 200 and drain fitting 400 are then placed into the cavity of an adhesive coated mold.

[0088] Again, the adhesive coating material is filled into the annular grooves of the drain body 200 and the drain joint 400, and the liquid adhesive coating material is injected into the cavity of the adhesive coating mold so as to cover the surface of the insertion point between the drain body 200 and the drain joint 400 and form an adhesive coating layer.

[0089] Finally, after the adhesive coating layer is formed, the connected drainage joint 400 and drainage body 200 are taken out.

[0090] It is understood that the step of inserting the drainage fitting 400 and the drainage body 200 into one another can be carried out before the step of placing the inserted water supply body 100 and the drainage body 200 into the cavity of the adhesive coating mold. That is, after the three components of the water supply body 100, the drainage body 200, and the drainage fitting 400 have been inserted into one another, or after the four components of the water supply fitting 300, the water supply body 100, the drainage body 200, and the drainage fitting 400 have been inserted into one another, the inserted water supply body 100, the drainage body 200, and the drainage fitting 400 can be placed together in the cavity of the adhesive coating mold to be adhesive coated, or the inserted water supply fitting 300, the water supply body 100, the drainage body 200, and the drainage fitting 400 can be placed together in the adhesive coating mold to perform the adhesive coating process. Of course, the process of inserting the water supply fitting 300 and the water supply body 100 into each other may be carried out after the process of forming the adhesive coating layer and then removing the connected water supply body 100 and drainage body 200. That is, the water supply body 100 and the drainage body 200 are connected by coating them with adhesive, and then the drainage body 200 and the drainage fitting 400 are connected by coating them with adhesive.

[0091] In one embodiment, as shown in Figures 1, 3 and 6, a fifth restriction portion 420 is installed at one end of the drainage fitting 400 close to the drainage body 200, a sixth restriction portion 240 is installed at one end of the drainage body 200 close to the drainage fitting 400, and the third sealing layer 530 includes a third fitting portion 531 that fits the fifth restriction portion and the sixth restriction portion 240.

[0092] In this embodiment, the fifth limiting portion 420 may specifically include a groove and / or a protrusion installed on the peripheral wall of the drain joint 400. The number of the groove and the protrusion may be one or more. The multiple grooves and protrusions may be installed at intervals in the axial direction of the drain joint 400 or at intervals in the circumferential direction of the drain joint 400. Similarly, the sixth limiting portion 240 may specifically include a groove and / or a protrusion installed on the peripheral wall of the drain body 200. The number of the groove and the protrusion may be one or more. The multiple grooves and protrusions may be installed at intervals in the axial direction of the drain body 200 or at intervals in the circumferential direction of the drain body 200. The third fitting portion 531 specifically includes a groove / protrusion that fits the protrusion / groove. The drainage joint 400 is provided with a fifth restriction portion 420, the drainage body 200 is provided with a sixth restriction portion 240, and the third sealing layer 530 includes a third fitting portion 531 that fits the fifth restriction portion 420 and the sixth restriction portion 240. This makes it easier for the third sealing layer 530 to be injection molded at the connection point between the drainage body 200 and the drainage joint 400, while increasing the contact area between the third sealing layer 530 and the drainage body 200 and the drainage joint 400, ensuring that the connection between the third sealing layer 530 and the drainage body 200 and the drainage joint 400 is tight and stable. At the same time, the fifth restriction portion 420, the sixth restriction portion 240 and the third fitting portion 531 can provide structural sealing and multiple sealing, and further improve the sealing effect of the third sealing layer 530 on the drainage body 200 and the drainage joint 400.

[0093] Furthermore, referring again to Figures 1, 3 and 6, the fifth restriction portion 420 includes a fifth annular groove opened in the peripheral wall of the drainage joint 400, the sixth restriction portion 240 includes a sixth annular groove opened in the peripheral wall of the drainage body 200, the third fitting portion 531 includes a fifth annular boss fitted into the fifth annular groove and a sixth annular boss fitted into the sixth annular groove, and the third sealing layer 530 further includes a third sealing ring 532 connecting the fifth annular boss and the sixth annular boss.

[0094] To ensure the sealing performance of the third sealing layer 530 with respect to the drainage body 200 and the drainage joint 400, the drainage body 200 and the drainage joint 400 are usually installed coaxially. The depth of the opened fifth annular groove and the depth of the opened sixth annular groove can be the same. The number of the fifth annular groove and the sixth annular groove can be one or more. When the number of the fifth annular groove and the sixth annular groove is more than one, the fifth annular grooves and the sixth annular grooves are spaced apart in the axial direction of the drainage body 200.

[0095] The fifth limiting portion 420 includes a fifth annular groove formed in the peripheral wall of the drainage joint 400, and the sixth limiting portion 240 includes a sixth annular groove formed in the peripheral wall of the drainage body 200, whereby the fifth and sixth annular grooves form an adhesive receiving groove. When the third sealing layer 530 is injection molded around the outer periphery of the connection between the drainage body 200 and the drainage joint 400, the molten sealant is evenly filled into the fifth and sixth annular grooves to form the fifth and sixth annular bosses, respectively, and the third sealing ring 532 connecting the fifth and sixth annular bosses. This configuration strengthens the connection between the drainage body 200 and the drainage joint 400, improving the sealing effect between them, while also ensuring the coaxiality of the drainage body 200 and the drainage joint 400. This ensures the dimensional accuracy of the entire device after adhesive coating and reduces the risk of water leakage.

[0096] In one embodiment, referring to Figures 1 to 4, the residual water removal device 10 further includes a throat portion 800, which is connected to the water supply body 100, and a throat passage 810 communicating with the water outlet end 112 of the first passage 110 is formed inside the throat portion 800, and the throat passage 810 has a cross-sectional area smaller than the cross-sectional areas of the first passage 110 and the second passage 210. An annular chamber 170 is formed on the outer periphery of the throat portion 800, and the throat passage 810 is connected to the second passage 210 through the annular chamber 170, and the annular chamber 170 is connected to the water guide passage 120.

[0097] In this embodiment, the throat 800 is specifically cylindrical. The throat 800 is connected to the water supply body 100, i.e., the throat 800 is connected to the outlet end 112 of the first passage 110. The throat passage 810 communicates with the second passage 210 through the annular chamber 170, i.e., the end face of the throat 800 and the inlet end of the second passage 210 are spaced apart. The lengths of the first passage 110 and the second passage 210 can be designed according to actual needs, and the length of the throat passage 810 is generally much shorter than the lengths of the first passage 110 and the second passage 210. The cross-sectional area of ​​the throat passage 810 is smaller than the cross-sectional areas of the first passage 110 and the second passage 210. The cross-sectional area of ​​the throat passage 810 is minimum. The throat passage 810 may be formed in the water supply joint 300 or the drain joint 400. The annular chamber 170 may be formed in the water supply joint 300 or in the drain joint 400. It is understood that the annular chamber 170 is installed around the outer periphery of the throat 800. The ratio between the maximum inner diameter of the annular chamber 170 and the inner diameter of the throat passage 810 can be selected and designed according to actual needs.

[0098] By forming an annular chamber 170 on the outer periphery of the throat portion 800, after the water flows from the first passage 110 to the throat passage 810, the water pressure of the water flow in the throat passage 810 increases and the flow rate slows down. After the water flows into the annular chamber 170, the pressure of the water flow decreases instantaneously and the flow rate increases, creating a negative pressure in the annular chamber 170. Due to this negative pressure, the residual water in the residual water outlet is sucked into the annular chamber 170 through the water guide passage 120, causing the residual water to flow into the drain passage 410 together with tap water and be discharged from the drain pipe. Compared with a conventional Venturi tube that generates negative pressure in the throat passage 810, by installing the annular chamber 170 on the outer periphery of the throat portion 800 so that the water guide passage 120 communicates with the annular chamber 170, negative pressure is generated in the annular chamber 170, which can increase the negative pressure and increase the residual water capacity of the residual water removal device 10, effectively improving the efficiency and effect of residual water adsorption of the residual water removal device 10. Optionally, the ratio of the maximum inner diameter of the annular chamber 170 to the inner diameter of the throat passage 810 is greater than or equal to 2, and less than or equal to 5. In this way, the negative pressure generated in the annular chamber 170 and the residual water capacity can be maximized, and the efficiency and effect of residual water adsorption of the residual water removal device 10 can be maximized.

[0099] 1 and 2, the annular chamber 170 is disposed within the water supply body 100. The water guide passage 120 and the throat passage 810 are also formed within the water supply body 100. Of course, in other embodiments, the annular chamber 170, the water guide passage 120, and the throat passage 810 may be disposed within the drainage body 200.

[0100] In one embodiment, the annular chamber 170 includes a tapered section 171 in which the inner diameter gradually decreases from the first passage 110 to the second passage 210. The entire annular chamber 170 may be configured as the tapered section 171 so that the inner diameter of the annular chamber 170 gradually decreases from the first passage 110 to the second passage 210. A portion of the annular chamber 170 may also be configured as the tapered section 171. Alternatively, a section of the annular chamber 170 close to the second passage 210 may be configured as the tapered section 171. By including the tapered section 171 in the annular chamber 170, the tapered section 171 serves as a guide for residual water and tap water within the annular chamber 170 and accelerates the flow rate of water flowing from the annular chamber 170 to the second passage 210, further improving the efficiency of residual water adsorption by the residual water removal device 10.

[0101] In addition, the present application proposes a dishwasher equipped with a drainage device and a residual water removal device 10, the drainage device including a tray, the tray having a water inlet and a residual water outlet, the specific configuration of the residual water removal device 10 is referred to the above embodiment, the water supply body 100 of the residual water removal device 10 is connected to the water inlet, the connection point between the first passage 110 and the second passage 210 of the residual water removal device 10 is connected to the residual water outlet via the water guide passage 120, this dishwasher adopts all the technical solutions of all the above embodiments, and therefore has at least all the beneficial effects brought by the technical solutions of the above embodiments, and we will not mention them one by one here.

[0102] In practice, a dishwasher also includes a main body, which includes an inner tank for holding dishes, which defines a water tub, a tray installed at the bottom of the tray for collecting wastewater after washing dishes, and a residual water outlet at the bottom of the tray. A drain pipe is connected to the residual water outlet, so that the drain fitting 400 of the residual water removal device 10 can communicate with the drain pipe. Specifically, a drain pump can also be installed, with one end of the drain pump connected to the drain pipe and the other end connected to the residual water outlet of the tray. After the dishwasher finishes washing dishes, the wastewater enters the tray and the drain pump starts operating, directly discharging the water in the tray through the drain pipe. However, the drain pump may not be able to completely drain the water from the tray, leaving a small amount of water in the tray. In this case, the drain pump stops operating. In order to drain the remaining water in the tray, the water supply pipe is directed toward the water supply fitting 300, and after the water flow passes through the water supply fitting 300, the water supply main body 100, the drain fitting 400, and the drain main body 200, the remaining water is sucked through the water conduit 120 by the negative pressure generated at the connection point between the first passage 110 and the second passage 210, and the remaining water between the bottom of the tray and the drain pump can be thoroughly extracted.

[0103] The above are merely arbitrary examples of the present application and do not limit the scope of the claims of the present application. Equivalent structural modifications made using the contents of the specification and attached drawings of the present application in the inventive idea of ​​the present application, or those directly or indirectly applied in other related technical fields, are also included in the scope of the claims of the present application.

Claims

1. A residual water removal device, comprising: a water supply body having a first passage formed therein; a drainage body connected to the water supply body and having a second passage formed therein; the first passage communicates with the second passage, at least a portion of the first passage is arranged so that a cross-sectional area thereof gradually decreases in a direction toward the second passage, at least a portion of the second passage is arranged so that a cross-sectional area thereof gradually decreases in a direction toward the first passage, the minimum cross-sectional area of ​​the first passage is equal to or less than the minimum cross-sectional area of ​​the second passage, and a communicating point between the first passage and the second passage is communicated with a residual water outlet via a water conducting passage, The drainage body is provided with a central insertion shaft formed to protrude from the end face of the drainage body on the water supply body side, the central insertion shaft being cylindrical, and the water supply body is provided with a central insertion hole formed to protrude from the end face of the water supply body on the drainage body side and fitting to the central insertion shaft, the water supply body further includes a throat portion formed protruding from the end surface of the water supply body where the central insertion hole is formed, a throat passage communicating with the water outlet end of the first passage is formed inside the throat portion, the cross-sectional area of ​​the throat passage is constant in the axial direction of the throat passage and is equal to the minimum cross-sectional area of ​​the first passage, and the length of the throat passage is shorter than the lengths of the first passage and the second passage, a chamfered portion is formed on the inner circumference of the central insertion shaft on the water supply body side, and an annular chamber is formed on the outer circumference of the throat portion, surrounded by the chamfered portion of the central insertion shaft, the inner peripheral wall of the central insertion hole, and the outer peripheral wall of the throat portion; the annular chamber is constituted by the chamfered portion and includes a tapered section installed so that the inner diameter gradually decreases from the first passage toward the second passage; the water guide passage is formed in the central insertion hole, the annular chamber communicates with the water guide passage, and the throat passage communicates with the second passage via the annular chamber; the ratio of the maximum inner diameter of the annular chamber to the inner diameter of the throat passage is greater than or equal to 2 and less than or equal to 5; A residual water removal device characterized in that the end face of the throat portion facing the drainage body and the end face of the central insertion shaft facing the water supply body are installed with a gap in the axial direction of the throat portion.

2. 2. The residual water removal device according to claim 1, wherein a first sealing layer is coated on the outer periphery of the joint between the water supply body and the drainage body.

3. 3. The residual water removal device according to claim 2, wherein the first sealing layer is injection molded around the outer periphery of the joint between the water supply body and the drainage body.

4. A residual water removal device as described in claim 2, wherein a first restriction portion is provided at one end of the water supply body close to the drainage body, a second restriction portion is provided at one end of the drainage body close to the water supply body, and the first sealing layer includes a first fitting portion that fits the first restriction portion and the second restriction portion.

5. The residual water removal device described in claim 4, wherein the first restriction portion includes a first annular groove opened in the peripheral wall of the water supply body, the second restriction portion includes a second annular groove opened in the peripheral wall of the drainage body, the first fitting portion includes a first annular boss fitted into the first annular groove and a second annular boss fitted into the second annular groove, and the first sealing layer further includes a first sealing ring connecting the first annular boss and the second annular boss.

6. The residual water removal device according to claim 2 , wherein the first sealing layer is made of a plastic material.

7. The residual water removal device described in any one of claims 1 to 6, further including a water supply fitting, the water supply fitting being sealedly connected to one end of the water supply body away from the drainage body, a water supply passage communicating with the first passage formed in the water supply fitting, a first check valve installed in the water supply passage, and the first check valve conducting in one direction from the water supply passage to the first passage.

8. 8. The residual water removal device according to claim 7, wherein a first restriction post is provided on one end surface of the water supply joint and the water supply body, and a first restriction slot is provided on the other end surface, and the first restriction post and the first restriction slot are fitted together.

9. 8. The residual water removal device according to claim 7, wherein the water supply joint and the water supply body are connected to each other, and a second sealing layer is coated on the outer periphery of the connection point between the water supply body and the water supply joint.

10. 10. The residual water removal device according to claim 9, wherein the second sealing layer is injection molded around the outer periphery of the joint between the water supply body and the water supply joint.

11. The residual water removal device described in any one of claims 1 to 6, further including a drain fitting, the drain fitting being sealed and connected to one end of the drain body away from the water supply body, a drain passage communicating with the second passage formed within the drain fitting, a second check valve installed within the drain passage, and the second check valve being unidirectionally connected from the second passage to the drain passage.

12. The residual water removal device according to claim 11, wherein the drain joint and the drain body are connected to each other, and a third sealing layer is coated on the outer periphery of the connection point between the drain body and the drain joint.

13. The residual water removal device according to claim 12, wherein the third sealing layer is injection molded around the outer periphery of the connection point between the drain body and the drain joint.

14. A dishwasher, the dishwasher comprising: a drainage device including a tray having a water inlet and a residual water outlet; A dishwasher characterized by including a residual water removal device according to any one of claims 1 to 13, wherein a water supply main body communicates with the water supply port, and the communicating point between the first passage and the second passage communicates with the residual water outlet via a water guide passage.

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