A dispensing device and a laundry treating apparatus

Abstract

A kind of delivery device, it includes, water supply waterway;Water supply waterway has with the anti-backflow gap of communication with external atmosphere;Water supply waterway is equipped with the injection hole in the anti-backflow gap upstream side, and the injection hole in the anti-backflow gap downstream side, the center line of injection hole is coaxially arranged with the center line of injection hole, and the diameter of injection hole is approximately equal to the diameter of injection hole.The present application is equipped with the gap of communication with external atmosphere on water supply waterway, the gap can be used to discharge the water flow from the jet flow device backflow, to achieve the use purpose of waterway anti-backflow;At the same time, by setting relatively opened injection hole and injection hole on water supply waterway, make the aperture of both be equal to be opened, to realize the water flow sprayed to injection hole can cover injection hole as far as possible, make the water inlet end of waterway downstream of injection hole not be open, to achieve the pressure of water inlet flow, avoid the occurrence of the water flow in the waterway downstream of gap due to the effect of gap during water inlet process.

Description

Technical Field

[0001] This invention relates to the field of clothing processing equipment with clothing processing function, and more particularly to a dispensing device with the function of introducing water into the clothing processing equipment. Background Technology

[0002] With economic development, more and more garment processing equipment has entered households. As living standards improve, these devices are no longer limited to washing; they integrate other functions such as drying and ironing. Regardless of the specific functions, most garment processing equipment requires a dispensing device to allow water to be supplied to different water-using components via various water supply channels. Furthermore, existing garment processing equipment includes dispensing chambers for adding one or more additives. These additives can be dispensed according to the different water supply channels, thus enabling the garment processing equipment to perform various garment processing functions.

[0003] However, the existing delivery devices have the following structural problems:

[0004] During the water intake process, if the water inlet faucet is damaged, the water inlet pipe is detached, or the user's household water supply is interrupted, negative pressure will be generated at the water inlet pipe of the clothing processing equipment. In particular, when the user's community water supply is interrupted, if the user lives on a high floor, negative pressure will be generated in the user's tap water supply line. This will cause the water mixed with additives in the water supply line of the clothing processing equipment to flow back and enter the tap water line, which will cause pollution to the user's household water source.

[0005] In existing technologies, a one-way check valve is usually installed at the water inlet of the water supply circuit of the garment processing equipment to solve the above problems. However, the one-way check valve may fail, making the water supply system of the entire garment processing equipment unreliable.

[0006] In view of this, in order to solve the above problems, the present invention is proposed. Summary of the Invention

[0007] This invention provides a dispensing device to achieve the purpose of supplying pressurized fluid flow and preventing backflow; at the same time, it also provides a clothing processing device equipped with the above-mentioned dispensing device to achieve the purpose of maintaining pressure in the downstream water channel of the backflow prevention gap and preventing the inlet water flow from depressurizing after passing through the backflow prevention gap.

[0008] To achieve the above-mentioned objectives, the specific solution adopted by the present invention is as follows:

[0009] The present invention provides a dispensing device, comprising: a water supply channel; the water supply channel having an anti-backflow gap communicating with the external atmosphere; the water supply channel having an ejection hole upstream of the anti-backflow gap and an injection hole downstream of the anti-backflow gap, the center line of the ejection hole and the center line of the injection hole being coaxially arranged, and the diameter of the ejection hole being approximately equal to the diameter of the injection hole.

[0010] Furthermore, the water supply line has a direct current section extending along a straight line, and the side wall of the direct current section is provided with a notch, which connects the water supply line to the external atmosphere, forming a backflow prevention gap.

[0011] Furthermore, the water supply circuit is provided with a front wall upstream of the anti-backflow gap and a rear wall downstream of the anti-backflow gap, with the injection hole located on the front wall and the injection hole located on the rear wall.

[0012] Preferably, both the front and rear walls are perpendicular to the axis of the DC channel segment.

[0013] Furthermore, the axis of the DC channel section is aligned with or parallel to the axes of the injection hole and the injection hole;

[0014] Preferably, the centers of the ejection port and the injection port are basically located at the central axis of the DC channel section, and the diameter of the injection port is slightly smaller than that of the ejection port.

[0015] Preferably, the difference between the inlet orifice diameter and the outlet orifice diameter is less than or equal to one-fifth of the inlet orifice diameter;

[0016] More preferably, the difference between the diameter of the injection hole and the diameter of the injection hole is less than or equal to one-tenth of the diameter of the injection hole.

[0017] Furthermore, the water supply line is also equipped with an inlet channel section, located on the upstream side of the front wall, and the inlet channel section is coaxially connected to the ejection hole.

[0018] The inlet flow channel section is a narrow flow channel with a gradually decreasing cross-sectional area from the inlet hole to the ejection hole;

[0019] Preferably, there is a flow channel section with a fixed diameter between the small end of the inlet flow channel section and the end face of the ejection hole, and the large end of the inlet flow channel section is connected to a flow channel section with a fixed diameter.

[0020] Furthermore, the water supply line is also equipped with a water outlet section, located on the downstream side of the rear end wall, and the water outlet section is coaxially connected to the injection hole.

[0021] The outlet flow channel is a variable diameter flow channel whose cross-sectional size gradually increases along the direction of the inlet water flow;

[0022] The small end of the outlet channel is connected to the injection hole, and the large end is connected to the downstream waterway.

[0023] Preferably, the outlet flow channel section has a fixed diameter and / or a narrowed flow channel section that narrows along the water flow direction between the small end of the outlet flow channel section and the end face of the injection hole.

[0024] Furthermore, the water supply path has an inlet chamber and an outlet chamber located at different heights. The inlet chamber is connected to the anti-backflow gap via an ejection hole and the outlet chamber is connected to the injection hole via an injection hole, respectively, to spray water from the inlet chamber into the outlet chamber and form a water path for water flow.

[0025] Preferably, the mounting cavity is strip-shaped, and the middle part of the strip-shaped mounting cavity is provided as a straight flow channel section with a notch in the side wall to form an anti-backflow gap; the two ends of the straight flow channel section are respectively provided with a front end wall with an ejection hole and a rear end wall with an injection hole; the mounting cavity on the upstream side of the front end wall forms an inlet flow channel section and the mounting cavity on the downstream side of the rear end wall forms an outlet flow channel section.

[0026] Furthermore, the dispensing device includes a water box, the top wall of which is formed by an upper cover, and the water supply circuit is integrated on the upper cover; the upper cover is composed of an upper cover plate and a lower cover plate that are interlocked with each other, and the water outlet cavity and the mounting cavity are provided on the upper cover plate protruding upwards. One end of the mounting cavity is open and connected to the water outlet cavity, and the injection hole is located between the open end and the anti-backflow gap; the water inlet cavity is located between the upper cover plate and the lower cover plate, and the other end of the mounting cavity is closed and has a through hole at the bottom that is connected to the lower water inlet cavity, and the injection hole is located between the closed end and the anti-backflow gap.

[0027] Furthermore, it also has a second water supply path, which is equipped with a vent. The vent is connected to the water inlet chamber formed inside the dispensing device through a ventilation channel. The anti-backflow gap is connected to the ventilation channel and is used to allow the outflowing backflow water to flow into the water inlet chamber through the ventilation channel. Preferably, the front end of the water inlet chamber is open and connected to the atmosphere, and the anti-backflow gap is connected to the external atmosphere through the ventilation channel and the water inlet chamber.

[0028] The present invention also provides a garment processing device, which is equipped with the above-mentioned dispensing device.

[0029] Compared with the prior art, the present invention has the following significant technological advancements:

[0030] This invention provides a gap in the water supply line that connects to the external atmosphere. This gap allows water flowing back from the ejector to be discharged, thus preventing backflow in the water supply line. Simultaneously, by providing opposing injection and ejection holes with equal diameters in the water supply line, the water sprayed onto the injection hole can cover it as much as possible, preventing the downstream water inlet from being open. This maintains pressure on the incoming water flow and prevents pressure loss in the downstream water supply line due to the gap during the water intake process.

[0031] At the same time, the present invention has a simple structure, significant effects, and is suitable for widespread use.

[0032] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0033] The accompanying drawings, as part of this invention, are provided to further illustrate the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention, but do not constitute an undue limitation thereof. Clearly, the drawings described below are merely some embodiments, and those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0034] Figures 1 to 3 This is a schematic diagram of the jet ejector from different perspectives in one embodiment of the present invention;

[0035] Figure 4 This is a bottom view of the jet ejector structure in one embodiment of the present invention;

[0036] Figure 5 This is one embodiment of the present invention. Figure 4 Schematic diagram of the DD section;

[0037] Figures 6 to 7 This is a schematic diagram of the exploded structure of the dispensing device in one embodiment of the present invention;

[0038] Figure 8 This is a side view of the dispensing device in one embodiment of the present invention;

[0039] Figure 9 This is one embodiment of the present invention. Figure 8 A schematic diagram of the AA section;

[0040] Figure 10 This is one embodiment of the present invention. Figure 8 A schematic diagram of the BB section;

[0041] Figure 11 This is one embodiment of the present invention. Figure 10 A schematic diagram of the CC section;

[0042] Figure 12 This is one embodiment of the present invention. Figure 11 A schematic diagram of the EE cross section;

[0043] Figure 13 This is one embodiment of the present invention. Figure 11 A magnified structural diagram at point F;

[0044] Figure 14 This is a schematic cross-sectional view of the dispensing device in another embodiment of the present invention;

[0045] Figure 15 This is another embodiment of the present invention. Figure 14 A magnified structural diagram at point G.

[0046] Main component descriptions: 100, Ejector; 200, Water supply path; 300, Dispensing device; 1, Front chamber; 2, Connecting part; 3, Rear chamber; 4, Inlet; 5, Outlet; 6, First conical flow channel; 7, Second conical flow channel; 8, Ejection hole; 9, Injection hole; 10, Gap; 11, Mounting rib; 12, Sealing ring; 13, Front end wall; 14, Rear end wall; 15, Housing; 201, First water supply path; 202, Second water supply path; 21, First inlet chamber; 22, Installation... 23. First water outlet chamber; 24. Opening; 25. Second water inlet chamber; 26. Water passage chamber; 27. Second water outlet chamber; 28. Water inlet; 29. ​​Water outlet; 210. Vent; 211. Positioning groove; 212. Ventilation channel; 213. Opening; 214. Overflow port; 31. Water box; 32. Top cover; 33. Water inlet chamber; 34. Top cover plate; 35. Bottom cover plate; 36. Water inlet valve; 37. Cover plate; 1'—Water inlet flow channel section; 2'—Direct flow channel section; 3'—Water outlet flow channel section.

[0047] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the invention in any way, but rather to illustrate the concept of the invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the defect management mode in the embodiments will be described in detail below with reference to the accompanying drawings.

[0049] Example 1

[0050] like Figures 1 to 5 As shown in the figure, this embodiment introduces an ejector 100, which is mainly used for water intake of clothing processing equipment such as washing machines and dryers. It allows the incoming water flow to be pressurized through the ejector to obtain an increased water pressure flow, while also preventing backflow of the incoming water flow and avoiding cross-contamination of water flows containing additives.

[0051] In this embodiment, the jet injector 100 used in the garment processing equipment consists of a front chamber 1, a connecting part 2, and a rear chamber 3 connected in sequence to form a channel through which the water flows. In this embodiment, the two ends of the front chamber 1 of the jet ejector are the jet ejector inlet 4 and the jet ejection hole 8, respectively. The inlet 4 is used to connect with the upstream waterway, and the jet ejection hole 8 is connected with the connecting part 2. The two ends of the connecting part 2 are connected with the jet ejection hole 8 of the front chamber 1 and the jet injection hole 9 of the rear chamber 3, respectively. At the same time, the connecting part 2 is provided with a gap 10 to connect the flow channel formed by the jet ejector 100 with the external atmosphere. The gap 10 is used to discharge the water flow that flows back from the rear chamber 3, so as to achieve the purpose of preventing backflow in the waterway where the jet ejector is installed. The two ends of the rear chamber 3 are the jet injection hole 9 and the jet ejector 100 outlet 5, respectively. The jet injection hole 9 is connected with the connecting part 2 and is opened opposite to the jet injection hole 9, so that the water flow in the connecting part 2 flowing into the jet injection hole 9 can jump over the gap 10 provided on the connecting part 2 under its own water pressure and be directly sprayed into the jet ejection hole 8 on the rear chamber 3, so as to achieve the effect of smooth water flow in the jet ejector 100 without interference from the gap.

[0052] In this embodiment, the rear chamber 3 has a variable diameter flow channel with a cross-sectional size that gradually increases along the water flow direction. The small end of the variable diameter flow channel is directly connected to the injection hole 9, so that the water inlet of the rear chamber 3 is formed by the narrowed variable diameter flow channel, thereby reducing the flow rate and pressure of the backflow in the rear chamber 3, and thus preventing the backflow from jumping over the gap 10 and flowing into the front chamber 1. At the same time, since the injection hole 9 of the rear chamber 3 is connected to the narrowed variable diameter flow channel, the aperture at the connection between the rear chamber 3 and the gap 10 becomes smaller, so that the water pressure in the rear chamber 3 will not be depressurized, thereby achieving the purpose of maintaining the pressure of the water flow in the rear chamber 3.

[0053] In this embodiment, the ejection port 8 and the injection port 9 of the jet injector 100 are coaxially arranged. The water jetting out of the ejection port 8 flows directly into the injection port 9 through the flow channel formed by the connecting part 2, so that the water jetting out of the ejection port 8 can be directly injected into the injection port 9 without interference, thereby achieving the effect of water flow jumping over the gap 10 and smooth water intake.

[0054] In this embodiment, the connecting part of the jet injector 100 is a cylindrical structure. The front chamber 1 and the rear chamber 3 are located at the two ends of the connecting part 2 of the cylindrical structure, respectively. The ejection port 8 of the front chamber 1 and the injection port 9 of the rear chamber 3 are both coaxial or parallel to the axis of the connecting part 2 of the cylindrical structure. Preferably, the injection port 9 and the ejection port 8 are located close to the axis of the cylindrical connecting part 2 to reduce the interference of the jetted water flow with the inner wall of the cylindrical connecting part 2.

[0055] In this embodiment, in order to ensure the water flow transition effect and improve the pressure holding effect of the jet injector 100, the following settings are made: the diameter of the cylindrical connecting part 2 is larger than the diameter of the injection hole 9 and the injection hole 8; preferably, the diameter of the cylindrical connecting part 2 is much larger than the diameter of the injection hole 9 and the injection hole 8; more preferably, the diameter of the cylindrical connecting part 2 is more than twice the diameter of the injection hole 9 and also more than twice the diameter of the injection hole 8, so that the water inlet end of the rear chamber is not open, but the variable diameter flow channel through the open is connected to the connecting part, thereby achieving the effect of maintaining the pressure of the water flow in the rear chamber.

[0056] like Figures 1 to 5 As shown, in this embodiment, the jet ejector 100 is an independent component consisting of a housing 15. The housing 15 is cylindrical, and the interior of the cylindrical housing 15 is hollow, forming a flow channel with a straight axis. Two partition ribs are arranged at intervals inside the flow channel, namely the front wall 13 and the rear wall 14, which are used to divide the flow channel inside the housing 15 into three parts. The housing 15 between the front wall 13 and the rear wall 14 forms the connecting part 2. The flow channel ends at both ends of the housing 15 form the inlet 4 and the outlet 5, respectively. The flow channel part between the inlet 4 and the front wall 13 forms the front chamber 1, and the flow channel part between the outlet 5 and the rear wall 14 forms the rear chamber 3. The ejection hole 8 is provided on the front wall 13 and the ejection hole 8 is provided on the rear wall 14. The injection hole 9 and the ejection hole 8 are coaxial and arranged close to the axial direction of the cylindrical housing 15. A notch is opened in the middle of the side wall of the housing 15, forming a gap 10 that connects the connecting part 2 to the outside atmosphere.

[0057] like Figures 1 to 5 As shown, in this embodiment, the variable diameter flow channel provided on the rear chamber 3 is a first conical flow channel 6 extending along the axial direction of the injection hole 9. The small end of the first conical flow channel 6 is connected to the injection hole 9, which is coaxially arranged with the same diameter, and the large end is connected to the water outlet 5 located on the side of the rear chamber 3 away from the connecting part. The water outlet 5 is used to connect the water path downstream of the jet ejector 100. The first conical flow channel 6 is coaxially arranged with the injection hole 9. Preferably, the diameter of the large end of the first conical flow channel 6 is larger than the diameter of the injection hole 8 and smaller than or equal to the diameter of the cylindrical connecting part 2.

[0058] Meanwhile, although this embodiment is described with the variable diameter flow channel set as a cone shape, the variable diameter flow channel in this invention is not limited to a cone shape. It can also be a flow channel structure with only one or more sides having an inclined slope and the cross-sectional area increasing along the direction of water inlet flow.

[0059] In this embodiment, the front chamber 1 is composed of a second conical flow channel 7 that gradually narrows along the water flow direction. It is used to pressurize the jet water flowing out of the ejection hole 8, so that the water flowing out of the ejection hole 8 has sufficient water pressure to jump to the connection part 2 and avoids problems such as the water flowing out of the gap 10 affecting the smoothness of water intake. Preferably, the small end of the second conical flow channel 7 is coaxially and equally sized with the ejection hole 8 of the front chamber 1 and is connected to it. The large end of the second conical flow channel 7 is located on the side of the front chamber 1 away from the connection part 2 and forms an inlet 4 that is connected to the water path upstream of the jet injector 100. The second conical flow channel 7 is coaxially arranged with the ejection hole 8 of the front chamber 1.

[0060] Similarly, in this embodiment, the flow channel of the front chamber is set as a cone shape to pressurize and spray the flowing water; however, the flow channel in the front chamber of the present invention is not limited to a cone shape, and can also be a flow channel structure with an inclined slope on only one or more sides and a cross-sectional area that decreases along the direction of the inlet water flow.

[0061] In this embodiment, one side of the cylindrical connecting portion 2 has a square notch extending in the axial direction. The notch forms a gap 10 that connects the flow channel of the ejector to the external atmosphere. Preferably, the cylindrical connecting portion 2 extends in the horizontal direction, and the notch on the side wall of the cylindrical connecting portion 2 faces downward. More preferably, the axes of the injection hole 9 and the injection hole 8 are eccentrically positioned slightly away from the notch relative to the axis of the cylindrical connecting portion 2, thereby allowing the backflowing water to flow smoothly out of the notch and further reducing the occurrence of backflow into the front chamber 1. Furthermore, the gap 10 on one side of the cylindrical connecting portion 2 has a width in the radial direction that is smaller than the radial diameter of the connecting portion 2, and a length in the axial direction that is less than or equal to the axial length of the connecting portion 2.

[0062] In this embodiment, the cross-sectional area of ​​the injection hole 9 is equal to or approximately equal to the cross-sectional area of ​​the injection hole 8, so that the water jet from the injection hole 8 can fill the injection hole 9 accordingly. This ensures that the injection hole 9 is covered by water during the water intake process, reducing the gap space between it and the external atmosphere, thereby achieving the effect of maintaining pressure on the water flowing into the rear chamber 3. Preferably, the cross-sectional area of ​​the injection hole 9 is slightly smaller than the cross-sectional area of ​​the injection hole 8, so that the water flowing to the injection hole 8 can flow into the injection hole 9 to the maximum extent, improving the water intake efficiency.

[0063] Preferred, such as Figures 1 to 5 As shown, in this embodiment, the injection hole 9 and the injection hole 8 of the jet injector 100 are coaxially arranged circular holes, and the diameter of the injection hole 9 is smaller than the diameter of the injection hole 8 and larger than seven-tenths of the diameter of the injection hole 8. More preferably, the injection hole 9 and the injection hole 8 of the jet injector 100 can also be channels with any cross-section, such as square, elliptical, polygonal, etc.

[0064] In this embodiment, the front chamber 1, connecting part 2, and rear chamber 3 of the jet injector 100 are all coaxially arranged, and the flow channels provided inside are connected in sequence to form a channel through which the water supply flows and whose axis extends in a straight line; preferably, the front chamber 1, connecting part 2, and rear chamber 3 are integrally arranged to form a columnar integral component, and the two ends of the columnar integral component respectively form a water inlet 4 and a water outlet 5, and the side wall of the columnar integral component is provided with a notch forming a gap 10.

[0065] Preferably, in this embodiment, the columnar outer wall of the jet ejector 100 is provided with at least one sealing ring 12, which is used to isolate the gap between the outer wall of the jet ejector 100 and the inner wall of the water channel after the jet ejector 100 is installed in the water channel, so that the water flow in the upstream water channel can only flow to the downstream water channel through the internal flow channel of the jet ejector 100; more preferably, at least one sealing ring 12 is provided upstream and downstream of the gap 10 of the jet ejector 100, respectively, to ensure that the water flow in the water channel in which the jet ejector 100 is installed will not leak out from the gap 10.

[0066] Example 2

[0067] like Figures 1 to 13 As shown in the figure, this embodiment introduces a dispensing device 300, including a water supply channel 200; a jet injector 100 is installed on the water supply channel 200, and the jet injector 100 is provided with an anti-backflow gap 10 that connects the water supply channel 200 to the external atmosphere; the jet injector 100 is provided with a variable diameter flow channel located downstream of the anti-backflow gap 10, whose cross-sectional size gradually increases along the water flow direction.

[0068] In this embodiment, the jet ejector 100 is installed inside the water supply circuit 200. The inlet 4 and outlet 5 of the jet ejector 100 are connected to the upstream and downstream of the water supply circuit 200, respectively, so that the incoming water flow in the water supply circuit 200 must flow through the flow channel inside the jet ejector 100. After the incoming water flow passes through the jet ejector 100, it will be affected by the variable diameter flow channel downstream of the anti-backflow gap 10 of the jet ejector 100, thereby achieving the effect of maintaining the pressure of the incoming water flow. This avoids the occurrence of pressure loss in the downstream water circuit after the gap 10 is opened in the water supply circuit, so that the water supply circuit 200 can provide high-pressure water flow while realizing the anti-backflow function.

[0069] like Figures 1 to 13 As shown, in this embodiment, the jet ejector 100 is the jet ejector 100 described in the first embodiment above, where the gap 10 of the jet ejector 100 in the first embodiment constitutes an anti-backflow gap 10. Of course, the jet ejector in this embodiment can also be other jet ejector structures that have the above-mentioned anti-backflow gap and a variable diameter flow channel is provided downstream of the anti-backflow gap (not shown in the drawings).

[0070] like Figures 6 to 11As shown, in this embodiment, the water supply circuit 200 is provided with an installation cavity 22, the jet injector 100 is provided in the installation cavity 22, the installation cavity 22 is provided with an opening 24, and the anti-backflow gap 10 of the jet injector 100 is set towards the opening 24, so that the flow channel inside the jet injector 100 is connected to the external atmosphere through the anti-backflow gap 10 and the opening 24.

[0071] Meanwhile, in this embodiment, in order to ensure the airtightness of the water supply circuit 200, a sealing ring 12 is provided on the outer periphery of the jet 100 at the upstream and downstream of the anti-backflow gap 10. The outer periphery of the sealing ring 12 is in sealed contact with the inner wall of the water supply circuit 200, so that the water supply circuit 200 will not leak water from the opening 24.

[0072] Furthermore, in order to ensure the smooth flow of water in the water supply circuit, the axis of the installation cavity 22 extends in a straight line, so that the water flowing out of the ejector 100 from the outlet 5 also extends in a straight line, thereby improving the pressure holding effect of the water supply circuit 200 and improving the smoothness of water flow.

[0073] In this embodiment, the dispensing device 300 includes a water box 31. The internal space of the water box 31 forms a water inlet cavity 33 that communicates with the external atmosphere. The front end of the water box 31 is open, and the top wall is formed by a cover 32. The water inlet cavity 33 is connected to the external atmosphere through the front end of the water box 31. The water supply circuit 200 is integrated on the cover 32 of the water box 31. The anti-backflow gap 10 of the jet injector 10 is opened downward and is connected to the water inlet cavity 33 inside the water box 31. This allows the water flowing back from the anti-backflow gap 10 to fall directly into the water inlet cavity 33 of the water box 31 and then flow out of the dispensing device 300 from the outlet at the bottom of the water inlet cavity 33. It also allows the anti-backflow gap 10 to communicate with the external atmosphere through the water inlet cavity 33.

[0074] In this embodiment, a drawer section located in the water inlet cavity 33 can also be installed inside the water box 31, which is open at the front and can be pulled outwards. The drawer section has one or more dispensing chambers for storing and dispensing different types of additives. At the same time, other water channels can be integrated on the upper cover 32 of the water box 31 to dispense the additives in each dispensing chamber accordingly, so as to achieve the effect of dispensing different additives (not shown in the drawings).

[0075] In this embodiment, the upper cover 32 of the water box 31 is formed by the corresponding snap-fit ​​connection of the lower cover plate 35 and the upper cover plate 34. The outer periphery of the upper and lower cover plates 34 and 35 is sealed and connected to form a hollow part inside. At the same time, multiple baffles are provided in the hollow part, so that the hollow part is divided into multiple different water channels. Of course, the upper cover 32 in this embodiment can also be set as an integral piece, and the required hollow water channels are set inside the upper cover of the integral piece.

[0076] like Figures 6 to 13As shown, in this embodiment, the upper cover plate 34 of the upper cover 32 of the water box 31 is provided with an upwardly protruding mounting cavity 22 and a first water outlet cavity 23. The mounting cavity 22 and the first water outlet cavity 23 are arranged in sequence and connected. The bottom of the end of the mounting cavity 22 away from the first water outlet cavity 23 is provided with an opening 24. The opening 24 connects the mounting cavity 22 protruding on the upper side of the upper cover plate 34 and the first water inlet cavity 21 provided on the lower side of the upper cover plate 34 and between the upper and lower cover plates 34 and 35. The top of one end of the first water inlet cavity 21 is connected to the mounting cavity 22 through the opening 24, and the bottom of the other end is connected to the external pipeline and the water inlet valve 36 through a connector, so as to form the water supply path 200 for the installation of the jet injector 100, namely the first water supply path 201.

[0077] In this embodiment, a sealing structure is provided between the ejector 100 and the inner wall of the water supply channel 200 to separate the opening 24 from the water supply channels 2 on the upstream and downstream sides of the ejector 100, so as to avoid problems such as water flowing directly out of the opening and into the gap affecting the jet water flow in the ejector channel.

[0078] In this embodiment, at least one radially outwardly protruding sealing structure is provided on the housing 15 of the jet injector 100 on the upstream and downstream sides of the anti-backflow gap 10, so as to achieve the purpose of separating the first water inlet chamber 21 and the first water outlet chamber 23 from the opening 24. In this embodiment, the sealing structure can be any structure with fluid sealing function in the prior art, such as a sealing ring, sealing gasket, etc. Preferably, in this embodiment, the sealing structure is a sealing ring 12 sleeved on the outer wall of the housing 15 of the jet injector 100. The sealing ring 12 is made of a material such as rubber that can produce elastic deformation. The outer periphery of the sealing ring 122 is in sealing contact with the inner wall of the water supply channel 200 to isolate the upstream and downstream water channels and thus form a sealing structure.

[0079] Preferably, in this embodiment, an inwardly recessed mounting groove is provided on the outer wall of the housing 15 of the jet injector 100, and the sealing rings 12 are fitted into the corresponding mounting grooves one by one to achieve the positioning and installation of the sealing rings 12 in the axial direction.

[0080] In this embodiment, the sealing ring 12 on the cylindrical jet ejector 100, located upstream of the anti-backflow gap 10, is located downstream of the strip-shaped mounting cavity 22 and the first water inlet cavity 21. The sealing ring 12 on the cylindrical jet ejector 100, located downstream of the anti-backflow gap 10, is located upstream of the strip-shaped mounting cavity 22 and the first water outlet cavity 23.

[0081] In this embodiment, the first water inlet chamber 21 is located below the strip-shaped mounting cavity 22. The bottom wall of the water inlet end of the mounting cavity 22 is provided with a through hole that communicates with the first water inlet chamber 21 below. At least a portion of the cylindrical jet ejector 100 is located above the through hole. The end of the cylindrical jet ejector 100 located above the through hole is the water inlet 4. There is a gap between the water inlet 4 and the inner wall surface of the strip-shaped mounting cavity 22 to ensure the smooth water intake of the jet ejector 100.

[0082] In this embodiment, the mounting cavity 22 and the first water outlet cavity 23 are coaxially arranged, so that the axis of the flow channel they form is in a straight line, making the water flow smoother.

[0083] In this embodiment, the ejector 100 is coaxially inserted into the mounting cavity 22. The front chamber 1 and the connecting part 2 of the ejector 100 are correspondingly inserted into the first water inlet cavity 21. The sealing ring 12 provided at the junction of the front chamber 1 and the connecting part 2 of the ejector 100 is in sealing contact with the inner wall of the mounting cavity 22, thereby separating the upstream and downstream parts of the mounting cavity 22, so that the water flowing into the mounting cavity 22 from the first water inlet cavity 21 can only flow into the flow channel inside the ejector 100. The bottom of the mounting cavity 22 near the first water outlet cavity 23 is provided with an opening 24, which is located downstream of the sealing ring 12 provided at the junction of the front chamber 1 and the connecting part 2 of the ejector 100. The opening is connected to the ventilation channel 212 provided between the upper cover plate 34 and the lower cover plate 35. The ventilation channel 212 is provided with an opening 213 that penetrates the lower cover plate 35, and the opening 213 connects the ventilation channel 212, the water inlet cavity 33 through the water box 31, and the atmosphere. The anti-backflow gap 10 on the connecting part 2 of the jet ejector 100 is oriented towards the opening 24, and the opening 213 is correspondingly opened below the opening 24, allowing the jet ejector 100 to directly communicate with the water inlet chamber 33 of the water box 31 via the anti-backflow gap 10, the opening 24, and the opening 213. The sealing ring 12 provided at the junction of the rear chamber 3 of the jet ejector 100 and the connecting part 2 is located in the mounting cavity 22 downstream of the opening 24 and is in sealing contact with the inner wall of the mounting cavity 22, thus separating the mounting cavity 22 from the first water outlet cavity 23. This prevents the first water outlet cavity 23 from directly communicating with the atmosphere through the gap 10, thus isolating the water path downstream of the jet ejector from the anti-backflow gap 10, thereby achieving the effect of maintaining pressure.

[0084] Meanwhile, a sealing ring 12 is provided on the outer periphery of the gap 10 of the ejector 100, one upstream and one downstream. The two sealing rings 12 are used to support and install the ejector 100 in the water inlet chamber 33, so that the front and rear ends of the ejector 100 are supported and installed respectively along the axial direction, so that the ejector 100 can be stably assembled in the water supply circuit 200.

[0085] In this embodiment, the top of the first water outlet chamber 23 is provided with a removable cover plate 37, so that the jet injector 100 can be installed or replaced after the cover plate 37 is removed. At the same time, in order to ensure the airtightness of the water supply circuit 200, a sealing structure needs to be provided at the junction of the cover plate 37 and the upper cover 32 to ensure that there is no gap between the cover plate 37 and the upper cover 32 in the water inlet chamber 33.

[0086] like Figures 1 to 13 As shown, in this embodiment, the peripheral wall of the jet ejector 100 is provided with an outwardly protruding mounting rib 11. The mounting rib 11 is placed on the upper cover 32 of the water box 31 to prevent the jet ejector 100 from rotating axially after being installed in the mounting cavity 22. At the same time, by clamping the mounting rib 11 between the cover plate 37 and the upper cover plate 34 of the upper cover 32, the jet ejector 100 can be limited in two different directions in the circumferential direction, effectively preventing the problem of circumferential rotation after installation. Preferably, the mounting rib 11 is located at the rear chamber 3 of the jet ejector 100 to avoid the problem of assembly inconvenience caused by the interference of the mounting rib 11 when the jet ejector 100 is inserted into the mounting cavity 22 from the first water outlet cavity 23. More preferably, the protruding length of the mounting rib 11 is greater than the difference between the radial dimension of the mounting cavity 22 and the outer peripheral radial dimension of the cylindrical jet ejector 100, so that the mounting rib can form a limiting structure, so that the jet ejector 100, during the process of being inserted from the first water outlet cavity 23 into the mounting cavity 22, is limited and abutted against the end of the first water outlet cavity 23, thereby ensuring that the jet ejector is installed in place.

[0087] Preferred, such as Figures 1 to 11 As shown, in this embodiment, a radially protruding and downwardly recessed positioning groove 211 is provided on one side of the first water outlet cavity 23. The positioning groove is located at the junction of the first water outlet cavity 23 and the mounting cavity 22, and is used to provide axial positioning and fixing of the mounting rib 11 after the jet injector 100 is installed. After the jet injector is installed into the mounting cavity 22, the mounting rib 11 protruding from the outer periphery of the rear chamber 3 of the jet injector 100 is inserted into the positioning groove 211, so that the mounting rib 11 is limited by the positioning groove 211, thereby realizing the axial fixing of the jet injector 100 and ensuring the fixed installation of the jet injector 100.

[0088] In this embodiment, the top of the upper cover 32 is provided with a positioning groove 211 connected to the first water outlet cavity 23 and located on one side of the first water outlet cavity 23. The positioning groove 211 is located at the connection between the first water outlet cavity 23 and the mounting cavity 22. The mounting rib 11 of the jet ejector 100 is inserted into the positioning groove 211. In this embodiment, the mounting rib 11 extends along the tangential direction of the outer peripheral wall of the cylindrical jet ejector 100. The distance between the end of the mounting rib 11 and the center of the cylindrical jet ejector 100 is greater than the radial dimension of the mounting cavity 22, so as to ensure that at least a part of the mounting rib 11 can be inserted into the positioning groove. The positioning groove is used to achieve the effect of axial installation limitation of the jet ejector. With the above settings, after the jet ejector 100 is inserted into the mounting cavity 22 from the first water outlet cavity 23, the jet ejector 100 is rotated around the axis, so that the mounting rib 11 is inserted into the positioning groove 211 from the upper opening and then the cover plate 37 is fastened, thereby achieving the purpose of fixing the jet ejector 100 on the dispensing device 300.

[0089] Furthermore, to ensure the jet injector 100 is fixed in the axial direction after installation, other positioning structures can be provided on the upper cover plate 34 to restrict the movement of the mounting rib 11 in the axial direction of the jet injector 100. The positioning structure can be any structure in the prior art, such as: two protruding ribs on the upper cover plate 34, which respectively limit the contact with the mounting rib 11 on opposite sides along the axial direction of the jet injector 100 to ensure the fixation of the jet injector 100 in the axial direction; or, a positioning groove is provided on the upper cover plate 34, and a corresponding positioning protrusion is provided on the mounting rib 11. After the mounting rib 11 is placed on the upper cover plate 34, the positioning protrusion is inserted into the positioning groove, which can also achieve the fixation of the jet injector 100 in the axial direction (not shown in the attached drawings).

[0090] Example 3

[0091] like Figures 1 to 13 As shown in the figure, this embodiment introduces a clothing processing device, which includes a first water supply channel 201 for providing high-pressure water inlet flow; a second water supply channel 202 for providing non-high-pressure water inlet flow; and an ejector 100 as described in the first embodiment is installed on the first water supply channel 201 to realize the functions of preventing backflow of water supply channel and maintaining pressure of water outlet flow.

[0092] In this embodiment, the garment processing device can be any existing device capable of processing garments, such as having any or a combination of functions including washing, drying, and ironing. In this embodiment, taking a garment processing device with a drying function as an example, the first water supply path is connected to a rinsing structure on the garment processing device. The rinsing structure rinses the lint filter. The lint filter can be a structure that filters lint during the drying process of the garment processing device, or any other lint filtering structure applied to garment processing devices in the prior art. The second water supply path is connected to a condenser on the garment processing device for supplying hot water to the condenser. The condenser can be a condenser that condenses and exchanges heat with the airflow in the duct during the drying process of the garment processing device, or any other condenser applied to garment processing devices in the prior art.

[0093] In this embodiment, the first water supply path 201 and the second water supply path 202 are integrated on the dispensing device 300 of the clothing processing equipment. The dispensing device 300 is the dispensing device 300 described in the second embodiment above, and the first water supply path 201 is the dispensing water path 200 described in the second embodiment above.

[0094] In this embodiment, the second water supply path 202 is installed on the upper cover 32 of the dispensing device 300. The second water supply path 202 is provided with a vent 210. The vent 210 is connected to the gap 10 of the jet injector 100 installed on the first water supply path 201 and is connected to the atmosphere through the same ventilation channel 212, so as to realize that different water supply paths on the dispensing device 300 share the same ventilation channel 212, thereby achieving the effect of simplifying the structure of the dispensing device.

[0095] In this embodiment, the dispensing device 300 is also provided with a ventilation channel 212. The two ends of the ventilation channel 212 are connected to the vent 210 of the second water supply channel 202 and the outside atmosphere, respectively. The anti-backflow gap 10 of the jet injector 100 is connected to the ventilation channel 212 through an opening 24 on the upper cover plate 34.

[0096] In this embodiment, the ventilation channel 212, the first water supply channel 201, and the second water supply channel 202 are all integrated on the upper cover 32 of the water box 31. One end of the ventilation channel 212 is connected to the water inlet cavity 33 formed by the water box 31, and the other end is connected to the vent 210 of the second water supply channel 202.

[0097] In this embodiment, the second water supply circuit 202 includes a second water inlet chamber 25, a water passage chamber 26, and a second water outlet chamber 27 that are connected in sequence.

[0098] The second water inlet chamber 25 is located on the upper cover 32 of the water box 31, between the upper cover plate 34 and the lower cover plate 35 of the upper cover 32. The bottom of the second water inlet chamber 25 is connected to the second water inlet pipe and the water inlet valve 36 via a connector.

[0099] The upper part of the second water inlet chamber 25 is provided with a water passage chamber 26. The water passage chamber 26 protrudes above the upper cover plate 34. The water passage chamber 26 has a water inlet 28 and a water outlet 29. The water inlet 28 and the water outlet 29 are alternately arranged on the bottom wall of the water passage chamber 26 and both penetrate the upper cover plate 34. The water inlet 28 connects the water passage chamber 26 with the top of the second water inlet chamber 25.

[0100] The second water outlet chamber 27 is located below the water passage chamber 26, between the upper cover plate 34 and the lower cover plate 35. The water passage outlet 29 connects the top of the water passage chamber 26 and the second water outlet chamber 27. The bottom of the second water outlet chamber 27 is provided with the second water outlet of the water supply flow dispensing device 300. The second water outlet is connected to the heat exchange water inlet pipe of the condenser of the clothing processing equipment through a pipeline to provide condensing heat exchange water to the condenser of the clothing processing equipment.

[0101] In this embodiment, the upper part of the second water outlet chamber 27 of the second water supply circuit 202 is provided with a vent 210. The vent 210 is formed by a notch opened at the top of the protruding rib provided on the lower cover plate 35 that constitutes the side wall of the second water outlet chamber 27. The notch connects the second water outlet chamber 27 located on both sides of the baffle rib with the ventilation channel 212. The ventilation channel 212 extends horizontally and is integrated on the upper cover 32 of the water box 31. The vent 210 is connected to one end of the ventilation channel 212. The other end of the ventilation channel 212 has an opening 213 that is connected to the water inlet chamber 33 below. The opening 213 is opened through the lower cover plate 35 of the upper cover 32.

[0102] In this embodiment, the jet injector 100 provided on the first water supply channel 201 is located above the opening 213 of the ventilation channel 212. The anti-backflow gap 10 provided on the jet injector 100 is set downward and opened opposite to the opening 213 below, so as to connect the anti-backflow gap 10 of the jet injector 100 directly to the water inlet cavity 33 of the water box 31 through the opening 213.

[0103] In this embodiment, the ventilation channel 212 is also provided with an overflow outlet 214. The overflow outlet 214 is located near the connection point of the vent 210 and is set away from the opening 213 relative to the vent 210. The overflow outlet 214 is connected to the drain pipe of the clothing processing equipment and is used to discharge the overflow water flow of the clothing processing equipment. Preferably, in order to ensure smooth discharge of the overflow water flow, the overflow outlet 214 is set at the lowest point of the ventilation channel 212 so as to ensure that all the overflow water flow flowing into the ventilation channel 212 can be discharged through the overflow outlet 214, and to ensure that the dispensing device 300 will not overflow.

[0104] Example 4

[0105] This embodiment introduces a dispensing device. The difference between the dispensing device described in this embodiment and the dispensing device in Embodiment 3 above is that the jet injector is not a separate independent component, but rather an integral part of the upper cover of the dispensing device integrated into the water supply line.

[0106] like Figure 14 and Figure 15 As shown, in this embodiment, the dispensing device includes a water supply path 200; the water supply path 200 has an anti-backflow gap 10 that is connected to the external atmosphere; the water supply path 200 is provided with an ejection hole 8 located upstream of the anti-backflow gap 10 and an injection hole 9 located downstream of the anti-backflow gap 10, the center line of the ejection hole 8 and the center line of the injection hole 9 are coaxially arranged, and the diameter of the ejection hole 8 is approximately equal to the diameter of the injection hole 9.

[0107] In this embodiment, the water supply channel 200 has a direct current channel segment 2' extending along a straight line. The side wall of the direct current channel segment 2' is provided with a notch, which connects the water supply channel 200 to the external atmosphere, forming an anti-backflow gap 10.

[0108] In this embodiment, the water supply channel 200 is provided with a front wall 13 upstream of the anti-backflow gap 10 and a rear wall 14 downstream of the anti-backflow gap 10. The injection hole 8 is provided on the front wall 13 and the injection hole 9 is provided on the rear wall 14. Preferably, the front wall 13 and the rear wall 14 are both arranged perpendicular to the axis of the direct current channel segment 2'.

[0109] In this embodiment, the axis of the DC channel segment 2' coincides with or is parallel to the axes of the injection hole 8 and the injection hole 9; preferably, the centers of the injection hole 8 and the injection hole 9 are basically located at the central axis of the DC channel segment 2', and the diameter of the injection hole 9 is slightly smaller than the diameter of the injection hole 8; preferably, the difference between the diameters of the injection hole 9 and the injection hole 8 is less than or equal to one-fifth of the diameter of the injection hole 9; more preferably, the difference between the diameters of the injection hole 9 and the injection hole 8 is less than or equal to one-tenth of the diameter of the injection hole 9 (similarly, the dimensional relationship between the injection hole and the injection hole of the dispensing device in Embodiment 2 also satisfies the above conditions).

[0110] In this embodiment, the water supply channel 200 is also provided with an inlet channel section 1', which is located on the upstream side of the front end wall 13. The inlet channel section 1' is coaxially connected to the ejection hole 8. The inlet channel section 1' is a narrow channel with a gradually decreasing cross-sectional area from the inlet hole 4 to the ejection hole 8. Preferably, there is a channel section with a fixed diameter between the small end of the inlet channel section 1' and the end face of the ejection hole 8, and the large end of the inlet channel section 1' is connected to a channel section with a fixed diameter.

[0111] In this embodiment, the water supply channel 200 is also provided with an outlet channel section 3', which is located on the downstream side of the rear end wall 14. The outlet channel section 3' is coaxially connected to the injection hole 9. The outlet channel section 3' is a variable diameter channel with a cross-sectional size that gradually increases along the direction of water flow. The small end of the outlet channel section 3' is connected to the injection hole 9, and the large end is connected to the downstream water channel. Preferably, there is a fixed diameter and / or a narrowing channel section that narrows along the direction of water flow between the small end of the outlet channel section 3' and the end face of the injection hole 9.

[0112] In this embodiment, the water supply channel 200 has an inlet cavity and an outlet cavity located at different heights. The inlet cavity is connected to the anti-backflow gap 10 via the ejection hole 8 and the outlet cavity is connected to the injection hole 9, respectively, to spray water from the inlet cavity into the outlet cavity and form a water channel for water flow.

[0113] In this embodiment, the mounting cavity 22 is strip-shaped, and the middle part of the strip-shaped mounting cavity 22 is provided as a straight channel section 2' with a notch in the side wall to form an anti-backflow gap 10; the two ends of the straight channel section 2' are respectively provided with a front end wall 13 with an ejection hole 8 and a rear end wall 14 with an injection hole 9; the mounting cavity 22 on the upstream side of the front end wall 13 forms the water inlet channel section 1', and the mounting cavity 22 on the downstream side of the rear end wall 13 forms the water outlet channel section 3'.

[0114] In this embodiment, the dispensing device includes a water box 31, the top wall of which is formed by an upper cover 32, and the water supply channel 200 is integrated on the upper cover 32. The upper cover 32 is formed by an upper cover plate 34 and a lower cover plate 35 that are connected to each other. The water outlet cavity and the mounting cavity 22 are provided on the upper cover plate 34. One end of the mounting cavity 22 is open and connected to the water outlet cavity. The injection hole 9 is provided between the open end of the mounting cavity 22 and the anti-backflow gap. The water inlet cavity is provided between the upper cover plate 34 and the lower cover plate 35. The other end of the mounting cavity 22 is closed and has a through hole at the bottom that is connected to the lower water inlet cavity. The injection hole 8 is provided between the closed end of the mounting cavity 22 and the anti-backflow gap 10.

[0115] In this embodiment, the water supply path 200 provided on the dispensing device 300 can be used as the first water supply path 201. The structure of the water inlet chamber and the water outlet chamber provided on the water supply path 200 in this embodiment is consistent with the structure of the first water inlet chamber 21 and the first water outlet chamber 23 of the first water supply path 201 provided on the dispensing device 300 in the above embodiment 2, and will not be discussed again here.

[0116] In this embodiment, a second water supply path 202 is also provided. The second water supply path 202 is provided with a vent 210. The vent 210 is connected to the water inlet cavity 33 formed inside the dispensing device 300 through the ventilation channel 212. The anti-backflow gap 10 is connected to the ventilation channel 212 to allow the outflowing backflow water to flow into the water inlet cavity 33 through the ventilation channel 212. Preferably, the front end of the water inlet cavity 33 is open and connected to the atmosphere. The anti-backflow gap 10 is connected to the external atmosphere through the ventilation channel 212 and the water inlet cavity 33.

[0117] Similarly, in this embodiment, the water supply path 200 provided on the dispensing device 300 can be used as the first water supply path 201, while the structure of the second water supply path 202 and the like is consistent with that of the dispensing device 300 in the above embodiment 2, and will not be discussed again here.

[0118] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A dispensing device, comprising a water supply path; characterized in that: The water supply line has a backflow prevention gap that connects to the outside atmosphere; The water supply circuit is equipped with an ejector hole located upstream of the backflow prevention gap and an injection hole located downstream of the backflow prevention gap. The centerline of the injection hole is set coaxially with the centerline of the injection hole, and the diameter of the injection hole is approximately equal to the diameter of the injection hole; It also has a second water supply circuit, which is equipped with a vent. The vent is connected to the water inlet chamber formed inside the dispensing device through a ventilation channel. The anti-backflow gap is connected to the ventilation channel and is used to allow the backflowing water to flow into the water inlet chamber through the ventilation channel.

2. The dispensing device according to claim 1, characterized in that, The water supply line has a straight section with its axis extending in a straight line. The side wall of the straight section has a notch that connects the water supply line to the outside atmosphere, forming a backflow prevention gap.

3. The dispensing device according to claim 2, characterized in that, The water supply circuit is equipped with a front wall upstream of the anti-backflow gap and a rear wall downstream of the anti-backflow gap. The injection hole is located on the front wall and the injection hole is located on the rear wall.

4. The dispensing device according to claim 3, characterized in that, Both the front and rear walls are set perpendicular to the axis of the DC channel section.

5. The dispensing device according to claim 3, characterized in that, The axis of the DC channel is aligned with or parallel to the axes of the injection hole and the injection hole.

6. The dispensing device according to claim 5, characterized in that, The centers of the ejection port and the injection port are basically set at the central axis position of the DC channel section, and the diameter of the injection port is slightly smaller than that of the ejection port.

7. A dispensing device according to claim 6, characterized in that, The difference between the inlet and outlet diameters is less than or equal to one-fifth of the inlet diameter.

8. The dispensing device according to claim 7, characterized in that, The difference between the inlet and outlet diameters is less than or equal to one-tenth of the inlet diameter.

9. A dispensing device according to any one of claims 1 to 8, characterized in that, The water supply line is also equipped with an inlet channel section, located on the upstream side of the front wall, and the inlet channel section is coaxially connected to the ejection hole. The inlet flow channel is a narrow flow channel with a gradually decreasing cross-sectional area from the inlet hole to the ejection hole.

10. A dispensing device according to claim 9, characterized in that, There is a flow channel section with a fixed diameter between the small end of the inlet flow channel section and the end face of the ejection hole, and the large end of the inlet flow channel section is connected to a flow channel section with a fixed diameter.

11. A dispensing device according to any one of claims 1 to 8, characterized in that, The water supply line is also equipped with a water outlet section, located on the downstream side of the rear end wall, and the water outlet section is coaxially connected to the injection hole. The outlet flow channel is a variable diameter flow channel whose cross-sectional size gradually increases along the direction of the inlet water flow; The small end of the outlet channel is connected to the injection hole, and the large end is connected to the downstream waterway.

12. A dispensing device according to claim 11, characterized in that, The outlet flow channel section has a fixed diameter and / or a narrowed flow channel section that narrows along the flow direction between the small end of the outlet flow channel section and the end face of the injection hole.

13. A dispensing device according to any one of claims 2 to 8, characterized in that, The water supply circuit has an inlet chamber and an outlet chamber located at different heights. The inlet chamber is connected to the anti-backflow gap via an ejection hole and the outlet chamber is connected to the injection hole via an injection hole. This is used to spray water from the inlet chamber into the outlet chamber to form a water passage for water flow.

14. A dispensing device according to claim 13, characterized in that, The mounting cavity is strip-shaped, with a straight flow channel section in the middle of the strip-shaped mounting cavity having a notch in the side wall to form an anti-backflow gap; the two ends of the straight flow channel section are respectively provided with a front end wall with an ejection hole and a rear end wall with an injection hole; the mounting cavity on the upstream side of the front end wall forms the water inlet channel section, and the mounting cavity on the downstream side of the rear end wall forms the water outlet channel section.

15. A dispensing device according to claim 14, characterized in that, The dispensing device includes a water box, the top wall of which is formed by an upper cover, and the water supply circuit is integrated on the upper cover. The upper cover is composed of an upper cover plate and a lower cover plate that are interlocked. The water outlet cavity and the mounting cavity protrude upward on the upper cover plate. One end of the mounting cavity is open and communicates with the water outlet cavity. The injection hole is located between the open end and the anti-backflow gap. The water inlet cavity is located between the upper cover plate and the lower cover plate. The other end of the mounting cavity is closed and has a through hole at the bottom that communicates with the lower water inlet cavity. The injection hole is located between the closed end and the anti-backflow gap.

16. A dispensing device according to any one of claims 1 to 8, characterized in that, The front end of the water inlet chamber is open and connected to the atmosphere. The backflow prevention gap is connected to the external atmosphere through the ventilation channel and the water inlet chamber.

17. A garment processing device, characterized in that: The garment processing equipment is equipped with the dispensing device as described in any one of claims 1 to 16.

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