Liquid feeding device, washing device and liquid feeding method

Abstract

The invention provides a liquid feeding device, a washing device and a liquid feeding method, and relates to the field of washing, the liquid feeding device comprises a liquid separation box, a first through hole is formed in the liquid separation box, and a second through hole is formed in the liquid separation box; a liquid inlet, a first liquid outlet and a second liquid outlet which are communicated with the liquid separation cavity are formed in the liquid separation box; a liquid storage cavity is formed in the liquid storage part, at least part of the liquid storage part is located in the liquid separation cavity, and a second through hole is formed in the liquid storage part; the infusion pump is fixed to the liquid separation box, the liquid inlet end of the infusion pump communicates with the liquid storage cavity through the first through hole and the second through hole, and the liquid outlet end of the infusion pump communicates with the liquid inlet; the venturi tube is fixedly connected with the liquid separation box, the venturi tube comprises a funnel-shaped structure and a venturi tube main body, the part, close to the throat part, of the contraction section of the venturi tube main body is connected with the funnel-shaped structure, and a negative pressure suction port is formed in the maximum opening of the funnel structure; and the negative pressure suction port is communicated with the second liquid outlet. The washing agent can be more fully mixed with clothes.

Description

Technical Field

[0001] The present invention relates to the field of washing, and in particular to a liquid dispensing device, a washing device, and a liquid dispensing method. Background Art

[0002] A washing machine with an automatic detergent dispensing function is equipped with a liquid dispensing device. The liquid dispensing device can input the corresponding type of washing liquid into the washing tub according to requirements. The mixing of the detergent dispensed by the related washing device with the clothes is not sufficient, resulting in poor washing effects. Summary of the Invention

[0003] The present invention provides a liquid dispensing device, a washing device, and a liquid dispensing method for solving the technical problem of how to make the mixing of the detergent and the clothes more sufficient, thereby improving the washing effect.

[0004] An embodiment of the present invention provides a liquid dispensing device. The liquid dispensing device includes: a liquid separation box, with a liquid separation cavity formed inside, and a first through hole opened on the liquid separation box; the liquid separation box is provided with a liquid inlet, a first liquid outlet, and a second liquid outlet communicating with the liquid separation cavity; a liquid storage member, with a liquid storage cavity formed inside, at least partially located in the liquid separation cavity, and a second through hole opened on the liquid storage member; a liquid pumping pump, fixed to the liquid separation box, the liquid inlet end of the liquid pumping pump communicates with the liquid storage cavity through the first through hole and the second through hole, and the liquid outlet end of the liquid pumping pump communicates with the liquid inlet; a Venturi tube, fixedly connected to the liquid separation box, the Venturi tube includes a funnel-shaped structure and a Venturi tube body, the contraction section of the Venturi tube body is connected to the funnel-shaped structure near the throat, and the maximum opening of the funnel structure forms a negative pressure suction port; the negative pressure suction port communicates with the second liquid outlet.

[0005] In some embodiments, an outer surface of the bottom surface of the liquid separation box protrudes with a second guiding cylinder having a bottom surface and a side surface. In the thickness direction parallel to the bottom surface of the liquid separation box and in the thickness direction perpendicular to the bottom surface of the liquid separation box, the second guiding cylinder protrudes from the bottom surface of the liquid separation box. A second liquid outlet channel communicating with the liquid separation cavity is formed inside the second guiding cylinder. One end of the second liquid outlet channel communicating with the liquid separation cavity forms the second liquid outlet. In the thickness direction perpendicular to the bottom surface of the liquid separation box, the second liquid outlet is located on the bottom surface and / or the side surface of the second guiding cylinder close to the liquid separation box. In the thickness direction parallel to the bottom surface of the liquid separation box, at least a part of the funnel-shaped structure close to the negative pressure suction port is located inside the second guiding cylinder on the side away from the liquid separation box.

[0006] In some embodiments, at least one mounting cylinder and at least one positioning post protrude outward circumferentially from the outer periphery of the second guide cylinder on the outer surface of the liquid separation box. The venturi tube further includes a second connection structure located on the flank of the venturi tube body. The second connection structure is provided with a mounting hole and a positioning hole. The positioning post can pass through the positioning hole to align the mounting hole with the mounting cylinder coaxially, and the mounting hole can be detachably connected to the mounting cylinder through a connecting piece.

[0007] In some embodiments, the liquid storage member is a liquid storage box, and a first chamber and a second chamber isolated from each other are formed inside the liquid storage box; the number of the liquid inlet end, the first through hole, the second through hole, the liquid outlet end, and the liquid inlet is two. The liquid extraction pumps are respectively communicated with the first chamber and the second chamber through the two first through holes and the two second through holes, and the liquid outlet ends of the liquid extraction pumps are respectively communicated with the two liquid inlets; the two liquid inlets include a spaced first liquid inlet and a second liquid inlet; wherein, the distance between the second liquid outlet and the first liquid inlet is less than the distance between the second liquid outlet and the second liquid inlet; the first liquid inlet is communicated with the first chamber, and the first chamber is used for storing the main detergent.

[0008] In some embodiments, the liquid storage member is a liquid storage bottle, the number of the first through hole, the second through hole, the liquid inlet, and the liquid storage bottle is two, and the liquid storage cavities inside the two liquid storage bottles form a first chamber and a second chamber; the two liquid inlet ends are respectively communicated with the first chamber and the second chamber through the two first through holes and the two second through holes; the two liquid outlet ends are respectively communicated with the two liquid inlets; the two liquid inlets include a spaced first liquid inlet and a second liquid inlet; wherein, the distance between the second liquid outlet and the first liquid inlet is less than the distance between the second liquid outlet and the second liquid inlet; the first liquid inlet is communicated with the first chamber, and the first chamber is used for storing the main detergent.

[0009] In some embodiments, the liquid separation box includes a liquid separation box body, a liquid separation box cover, and a top cover; the liquid separation box body is fixedly connected to the liquid separation box cover, and the liquid separation box body and the liquid separation box cover enclose to form the liquid separation cavity; on a side of the liquid separation box cover facing away from the liquid separation cavity, there is a fourth convex wall, the top cover is fixedly connected to the fourth convex wall, and the fourth convex wall and the top cover enclose to form a condensation cavity; and / or, on a side of the top cover facing the liquid separation cavity, there is a fourth convex wall, the liquid separation box cover is fixedly connected to the fourth convex wall, and the fourth convex wall and the liquid separation box cover enclose to form a condensation cavity; wherein, the liquid separation box cover and the top cover also enclose to form a pressure balance channel, the pressure balance channel is connected to the washing cylinder through a pressure balance pipe, the pressure balance channel is communicated with the condensation cavity, and is used for condensing the moisture in the humid hot air entering the condensation cavity through the pressure balance pipe; in a first direction, the pressure balance channel is located on a side of the liquid separation box away from the liquid storage member, and the condensation cavity is located on a side of the liquid separation box cover close to the pressure balance channel; a communication port is formed in a portion of the liquid separation box cover located in the condensation cavity, and the communication port communicates the condensation cavity and the liquid separation cavity.

[0010] In some embodiments, the fourth convex wall includes an outer peripheral convex wall and an inner convex wall, the outer peripheral convex wall and the top cover enclose to form the condensation cavity, and / or, the outer peripheral convex wall and the liquid separation box cover enclose to form a condensation cavity; the inner convex wall extends along a curve in the condensation cavity to form a condensation channel in the condensation cavity; heat exchange fins are convexly provided on side walls of the outer peripheral convex wall and / or the inner convex wall adjacent to the condensation channel, and a plurality of the heat exchange fins are arranged at intervals along the extending direction of the condensation channel.

[0011] In some embodiments, there are a plurality of the condensation channels, and the distances between the projections of the plurality of condensation channels on a first plane and the projection of the pressure balance channel on the first plane are different. The condensation channel with the smallest distance is the first condensation channel. The liquid separation box cover also has a water inlet joint, and the water inlet joint is communicated with the first condensation channel. Wherein, the first plane is a plane with the thickness direction of the liquid separation box cover as the normal line; the number of communication ports on a portion of the liquid separation box cover located in the first condensation channel is greater than the number of communication ports on a portion of the liquid separation box cover located in the second condensation channel, and the second condensation channel is the condensation channel other than the first condensation channel among the condensation channels; and / or, a plurality of the heat exchange fins are arranged at intervals along the extending direction of the second condensation channel, and the second condensation channel is the condensation channel other than the first condensation channel among the condensation channels.

[0012] In some embodiments, the liquid dispensing device further includes: a liquid suction connector detachably connected to the liquid separation box. The liquid suction connector includes a tubular portion. A first end of the tubular portion is located outside the liquid separation box, and a second end of the tubular portion opposite to the first end extends into the liquid separation cavity through the first through hole. The second end of the tubular portion can communicate with the second through hole; a liquid suction pipe connecting the liquid inlet end of the liquid suction pump and the first end of the tubular portion; a liquid return pipe connecting the liquid outlet end of the liquid suction pump and the liquid inlet; a suction pipe located in the liquid storage cavity. The suction pipe has opposite third and fourth ends. The third end communicates with the second through hole. The suction pipe extends from the third end towards the bottom surface of the liquid storage cavity to form the fourth end, and the fourth end has a suction port.

[0013] An embodiment of the present invention further provides a washing device, which includes: a housing forming a receiving cavity; a washing tub located in the receiving cavity; the liquid dispensing device provided in the above embodiment. The venturi tube body further includes an inlet section and a diffuser section. The inlet section is connected to a premixing water inlet pipe, and the diffuser section is connected to a spray pipe. One end of the spray pipe communicating with the washing tub forms a spray port; the liquid dispensing device is connected to a water inlet pipe, and the first liquid outlet communicates with the washing tub through a transfer pipe; a water inlet valve assembly including a first valve and a second valve. The first valve controls the on-off of the water inlet pipe, and the second valve controls the on-off of the premixing water inlet pipe.

[0014] An embodiment of the present invention further provides a liquid dispensing method, which is applied to the washing device provided in the above embodiment. The liquid dispensing method includes: controlling the first valve to open for a first duration and then controlling the first valve to close to allow water to enter the water inlet pipe; controlling the second valve to open to allow water to enter the venturi tube through the premixing water pipe; when the opening duration of the second valve reaches a second duration, controlling the liquid suction pump to open to allow the detergent to enter the liquid separation cavity, and when the liquid suction pump operates for a third duration, controlling the second valve and the liquid suction pump to close; controlling the first valve to open, and controlling the first valve to close after the first valve opens for a fourth duration; controlling the second valve to open, and controlling the second valve to close after the second valve opens for a fifth duration; controlling the first valve and the second valve to open, and controlling the first valve and the second valve to close after the first valve and the second valve open for a sixth duration to make the liquid level in the washing tub reach a preset water level.

[0015] The present invention provides a liquid dispensing device, which includes a liquid separation box with a liquid separation cavity formed inside, a liquid storage member located inside the liquid separation box and having a liquid storage cavity formed inside, and a liquid extraction pump located outside the liquid separation box. Among them, the liquid separation box has a first through hole, the liquid storage member has a second through hole, and the liquid inlet end of the liquid extraction pump is communicated with the liquid storage cavity through the first through hole, the second through hole and a liquid extraction pipe. The liquid separation box has a liquid inlet and a first liquid outlet, and the liquid outlet end of the liquid extraction pump is communicated with the liquid inlet. At the same time, the liquid dispensing device further includes a Venturi tube, which is fixedly connected to the liquid separation box. The Venturi tube includes a funnel-shaped structure and a Venturi tube body. The contraction section of the Venturi tube body is connected to the funnel-shaped structure near the rear part, and the maximum opening of the funnel-shaped structure forms a negative pressure suction port, and the negative pressure suction port is communicated with the second liquid outlet. It can be understood that while the liquid dispensing device passes the detergent mixed with water into the washing tub through the first liquid outlet, it also sprays the detergent mixed with water into the washing tub through the second liquid outlet and the Venturi tube, so that the detergent is more fully mixed with the clothes in the washing tub, thereby improving the washing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of a liquid dispensing device provided by an embodiment of the present invention;

[0017] Figure 2 is an assembly schematic diagram of a liquid separation box and a Venturi tube in the liquid dispensing device provided by an embodiment of the present invention;

[0018] Figure 3 is a schematic structural diagram of a liquid separation box in the liquid dispensing device provided by an embodiment of the present invention;

[0019] Figure 4 is a schematic structural diagram of a Venturi tube in the liquid dispensing device provided by an embodiment of the present invention;

[0020] Figure 5 is an exploded view of the first liquid dispensing device provided by an embodiment of the present invention;

[0021] Figure 6 is an assembly schematic diagram of a liquid separation box and a liquid storage box in the liquid dispensing device provided by an embodiment of the present invention;

[0022] Figure 7 is an assembly schematic diagram of a liquid separation box and a liquid storage member in the liquid dispensing device provided by an embodiment of the present invention;

[0023] Figure 8 is an exploded view of a liquid separation box in the liquid dispensing device provided by an embodiment of the present invention;

[0024] Figure 9 is a schematic structural diagram of a liquid separation box body in the liquid dispensing device provided by an embodiment of the present invention;

[0025] Figure 10 Schematic structural diagram of another liquid distribution box in the liquid dispensing device provided by the embodiment of the present invention;

[0026] Figure 11 Exploded view of another liquid dispensing device provided by the embodiment of the present invention;

[0027] Figure 12 Assembly schematic diagram of a liquid storage member and a liquid extraction tube in the liquid dispensing device provided by the embodiment of the present invention;

[0028] Figure 13 Schematic structural diagram of a washing device provided by the embodiment of the present invention;

[0029] Figure 14 Schematic flow diagram of a liquid dispensing method provided by the embodiment of the present invention.

[0030] Description of reference numerals

[0031] 1. Washing device; 10. Liquid dispensing device; 100. Liquid distribution box; 110. Liquid distribution cavity; 111. First liquid outlet; 120. First through hole; 150. Liquid inlet; 151. First liquid inlet; 152. Second liquid inlet; 160. Second liquid outlet; 161. Second liquid outlet channel; 162. Second guide cylinder; 163. Installation cylinder; 164. Positioning column; 165. Installation plate; 181. Liquid distribution box body; 182. Liquid distribution box cover; 1821. Fourth convex wall; 183. Top cover; 1822. Peripheral convex wall; 1823. Inner convex wall; 184. Condensation cavity; 1842. Condensation channel; 1845. Heat exchange fins; 1846. First condensation channel; 1847. Second condensation channel; 185. Communication port; 186. Air pressure balance channel; 187. Air pressure balance tube; 188. Water inlet joint; 189. Third liquid outlet; 193. Fixing member; 200. Liquid storage member; 210. Liquid storage cavity; 211. First cavity; 212. Second cavity; 220. Second through hole; 300. Liquid extraction joint; 310. Tubular part; 400. Liquid extraction pump; 500. Liquid extraction tube; 600. Return liquid tube; 700. Suction tube; 741. Suction port; 800. Venturi tube; 810. Negative pressure suction port; 820. Venturi tube body; 821. Connection structure; 822. Installation hole; 823. Positioning hole; 830. Funnel-shaped structure; 901. Third groove; 20. Housing; 21. Accommodation cavity; 30. Washing cylinder. Detailed implementation manners

[0032] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0033] In the various specific technical features described in the specific embodiments, without conflict, they can be combined in any suitable manner. For example, different embodiments and technical solutions can be formed by combining different specific technical features. To avoid unnecessary repetition, various possible combination methods of the specific technical features in the present invention will not be described separately.

[0034] In the following description, the terms "first / second / ..." only distinguish different objects and do not indicate that there are the same or related relationships between the objects. It should be understood that the orientation descriptions "above", "below", "outside", and "inside" are all orientations in the normal use state, and the "left" and "right" directions represent the left and right directions shown in the specific corresponding schematic diagram, which can be the left and right directions in the normal use state or not.

[0035] It should be noted that the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, the element defined by the statement "including one..." does not exclude the existence of other identical elements in the process, method, article or device including the element. The term "connection" includes both direct connection and indirect connection without special explanation.

[0036] In some specific embodiments, the liquid dispensing device can be used to dispense any washing liquid, which can include main detergent, or can include main detergent and auxiliary detergent. The auxiliary detergent can be a fabric softener. The liquid dispensing device can directly input the detergent into the washing tub of the washing machine, and the liquid dispensing device can also pre-mix the washing liquid with water and then input the mixture into the washing tub of the washing machine.

[0037] In some embodiments, in combination with Figure 1 and Figure 2 , the liquid dispensing device 10 includes a liquid separation box 100, a liquid storage member 200, a liquid pumping pump 400, and a Venturi tube 800.

[0038] As Figure 1As shown, a liquid separation chamber 110 is formed inside the liquid separation box 100. The liquid separation box 100 is provided with a liquid inlet 150 and a first liquid outlet 111 that communicate with the liquid separation chamber 110. The detergent can enter the liquid separation chamber through the liquid inlet 150 and be output from the first liquid outlet 111. Optionally, the liquid separation box 100 also has a water inlet, and the detergent can be mixed with water in the liquid separation box 100 and then output from the first liquid outlet 111 (at this time, the detergent is less likely to remain in the liquid separation box 100 under the flushing of water), so that the detergent can come into more sufficient contact with the clothes in the washing tub of the washing machine. A liquid storage member 200 has a liquid storage chamber 210 formed inside. The liquid storage chamber 210 is used to store the detergent, and the liquid storage member 200 can slide relative to the liquid separation box 100 in a first direction (the first direction is as shown by the arrow in Figure 1 ), so that it is convenient for the user to replenish the detergent into the liquid storage member 200 when the liquid storage member 200 slides out relative to the liquid separation box, or the liquid storage member 200 can be loaded into or taken out of the liquid separation box 100 by moving the liquid storage member 200 relative to the liquid separation box 100.

[0039] The liquid storage member 200 is provided with a second through hole 220. The central axis of the second through hole 220 is parallel to the first direction. The liquid suction pump 400 is located outside the liquid separation box 100, and the liquid inlet end of the liquid suction pump 400 communicates with the liquid storage chamber 210 through the first through hole 120 and the second through hole 220, so that the liquid suction pump 400 can pump the detergent out of the liquid storage chamber 210; the liquid outlet end of the liquid suction pump 400 communicates with the liquid inlet 150 of the liquid separation box 100, so that the detergent pumped out by the liquid suction pump 400 can enter the liquid separation chamber 110 through the liquid inlet 150, and further the detergent can be output from the first liquid outlet 111. Among them, the liquid inlet end of the liquid suction pump 400 can be directly connected to the first through hole 120 or indirectly connected to the first through hole 120 through a pipeline, and the liquid outlet end of the liquid suction pump 400 can be directly connected to the liquid inlet 150 or indirectly connected to the liquid inlet 150 through a pipeline.

[0040] As Figure 2 shown, the Venturi tube 800 is fixedly connected to the liquid separation box 100. The Venturi tube 800 includes a Venturi tube main body 820 and a funnel-shaped structure 830. One end of the Venturi tube main body 820 is an inlet section, and the other end of the Venturi tube main body 820 is a diffuser section. The diameter contracts between the inlet section and the diffuser section to form a constriction section. A throat is formed at a position near the diffuser section of the constriction section. A funnel-shaped structure 830 is connected to the vicinity of the throat of the constriction section. The funnel-shaped structure 830 and the Venturi tube main body 820 form an angle. The end of the funnel-shaped structure 830 away from the Venturi tube main body 820 has the largest opening in the funnel-shaped structure 830 and forms a negative pressure suction port 810. The negative pressure suction port 810 is connected to Figure 3is connected to the second liquid outlet 160. When liquid is introduced into the venturi tube main body 820 (flowing in from the inlet section and flowing out from the diffuser section), a negative pressure is formed at the negative pressure suction port 810, sucking the liquid and gas in the liquid separation box 100 to the venturi tube main body through the negative pressure suction port 810 and flowing out from the diffuser section.

[0041] The present invention provides a liquid dispensing device, which includes a liquid separation box with a liquid separation cavity formed inside, a liquid storage member located inside the liquid separation box and having a liquid storage cavity formed inside, and a liquid pumping pump located outside the liquid separation box. Among them, the liquid separation box has a first through hole, the liquid storage member has a second through hole, and the liquid inlet end of the liquid pumping pump is connected to the liquid storage cavity through the first through hole, the second through hole, and a liquid suction pipe located inside the liquid storage cavity. The liquid separation box has a liquid inlet, and the liquid outlet end of the liquid pumping pump is connected to the liquid inlet. Under the action of the liquid pumping pump, the detergent is drawn out of the liquid storage cavity by the liquid suction pipe, passes through the first through hole and the second through hole to the outside of the liquid separation box, and then enters the liquid separation box from the liquid inlet. The liquid separation box also has a water inlet joint for connecting a water inlet pipe (the water inlet joint is provided on the liquid separation box cover, for example), a first liquid outlet and a second liquid outlet. The first liquid outlet is connected to the washing tub, and the second liquid outlet is connected to the negative pressure suction port of the venturi tube.

[0042] It should be noted that the connection in the embodiments of the present application can be understood in a broad sense, which can be understood as connected and fluid-conducted, or can be understood as connected and fluid-conducted when specific conditions are met. For example, a canopy valve can be provided in the liquid suction pipe. When the liquid storage member 200 is entirely located inside the liquid separation cavity 110 and the liquid pumping pump 400 is operating, the canopy valve in the liquid suction pipe opens, and the liquid inlet end of the liquid pumping pump is connected to the liquid storage cavity through the first through hole, the second through hole, and the liquid suction pipe located inside the liquid storage cavity, and the detergent in the liquid storage cavity enters the liquid pumping pump. When the liquid storage member 200 is entirely located inside the liquid separation cavity 110 but the liquid pumping pump 400 is not operating, or when the liquid storage member 200 is at least partially drawn out of the liquid separation cavity 110 by the user, the canopy valve in the liquid suction pipe closes, so as to ensure that the liquid storage member 200 does not leak liquid in a non-liquid pumping state.

[0043] Meanwhile, the liquid dispensing device further includes a Venturi tube fixedly connected to the liquid separation box. The Venturi tube includes a funnel-shaped structure and a Venturi tube body. The contraction section of the Venturi tube body is connected to the funnel-shaped structure near the throat. The maximum opening of the funnel-shaped structure forms a negative pressure suction port, and the negative pressure suction port is communicated with the second liquid outlet. When liquid is introduced into the Venturi tube body 820, a negative pressure is formed at the negative pressure suction port 810, sucking the liquid and gas in the liquid separation box 100 through the negative pressure suction port 810 into the Venturi tube body and flowing out from the diffuser section. The diffuser section of the Venturi tube is connected to a spray pipe. One end of the spray pipe is connected to the diffuser section of the Venturi tube, and the other end is connected to the washing cylinder. The end of the spray pipe communicated with the washing cylinder forms a spray port. Therefore, while the liquid dispensing device 10 passes the detergent mixed with water into the washing cylinder through the first liquid outlet 111, the mixture of detergent, water, and air in the liquid separation box is sucked into the Venturi tube 800 under the action of negative pressure for sufficient mixing and foaming. Then, the mixture is sprayed into the washing cylinder through the spray pipe connected to the diffuser section of the Venturi tube, so that the detergent can be fully foamed before entering the washing cylinder and contacting the clothes, greatly improving the washing ratio.

[0044] In some embodiments, in combination with Figure 2 and Figure 3 , a second guiding cylinder 162 having a bottom surface and a side surface is convexly provided on the outer surface of the bottom surface of the liquid separation box 100. In the thickness direction parallel to the bottom surface of the liquid separation box 100 and in the thickness direction perpendicular to the bottom surface of the liquid separation box 100, the second guiding cylinder 162 protrudes from the bottom surface of the liquid separation box 100. A second liquid outlet channel 161 is formed in the second guiding cylinder 162. The second liquid outlet channel 161 is communicated with the liquid separation cavity 110, and the end of the second liquid outlet channel 161 communicated with the liquid separation cavity 110 forms a second liquid outlet 160. It can be understood that the second guiding cylinder 162 not only protrudes from the bottom surface of the liquid separation box 100 in the thickness direction of the bottom surface of the liquid separation box 100, but also laterally protrudes from the bottom surface of the liquid separation box 100 in the direction perpendicular to this thickness direction, so that the second guiding cylinder 162 is not completely located directly below the liquid separation box 100, but is offset laterally in the direction away from the liquid separation box 100, so that the second guiding cylinder 162 and the Venturi tube 800 can avoid other parts of the liquid dispensing device 10 at the bottom of the liquid separation box 100 (such other parts can be, for example, pipelines or wire harnesses), creating space for other parts of the liquid dispensing device 10 or parts used in cooperation with the liquid dispensing device 10.

[0045] The second guiding cylinder 162 is offset laterally in a direction away from the liquid separation box 100, and the second liquid outlet can only be opened in the overlapping area of the projection of the second guiding cylinder 162 on the bottom surface of the liquid separation box and the bottom surface of the liquid separation box 100. Therefore, the second liquid outlet 160 is not completely coaxial with the second guiding cylinder 162. In the thickness direction perpendicular to the bottom surface of the liquid separation box 100, compared with the second guiding cylinder 162, the second liquid outlet 160 is offset toward the side close to the liquid separation box 100. At the same time, since the second guiding cylinder 162 is offset laterally in a direction away from the liquid separation box 100, a part of the second guiding cylinder does not take the bottom surface of the liquid separation box as its bottom surface but has its own independent bottom surface. The second liquid outlet 160 can be opened on the side surface or the bottom surface of the second guiding cylinder 162. In order to obtain a larger second liquid outlet, the second liquid outlet 160 can be opened on the side surface and the bottom surface of the second guiding cylinder. In this way, the communication area between the second liquid outlet 160 and the liquid separation cavity 110 is increased, so that more detergent can flow out of the liquid separation cavity 110 through the second liquid outlet 160.

[0046] Moreover, in the thickness direction parallel to the bottom surface of the liquid separation box 100, the part of the funnel-shaped structure 830 close to the negative pressure suction port 810 and close to the liquid separation box 100 is located inside the second guiding cylinder 162 on the side away from the liquid separation box 100 (that is, the funnel structure is installed inside the second guiding cylinder, and the second guiding cylinder is used to accommodate the funnel structure), so that the connection between the negative pressure suction port 810 and the second liquid outlet 160 is more reliable.

[0047] Optionally, as Figure 3 shown, an installation plate 165 also protrudes from the outer surface of the bottom surface of the liquid separation box 100. The installation plate 165 extends in a direction perpendicular to direction A, and direction A is the thickness direction of the bottom surface of the liquid separation box 100. In the thickness direction parallel to the bottom surface, a part of the second guiding cylinder 162 protrudes from the outer surface of the bottom surface of the liquid separation box 100, and another part protrudes from the outer surface of the installation plate 165. The second liquid outlet 160 is located on the outer surfaces of the liquid separation box 100 and the installation plate 165, forming at least a part of the bottom surface of the second guiding cylinder 162.

[0048] In some embodiments, combining Figure 2 and Figure 3 , in the thickness direction parallel to the bottom surface of the liquid separation box 100, the part of the funnel-shaped structure 830 close to the liquid separation box 100 and close to the negative pressure suction port 810 is located inside the second guiding cylinder 162 on the side away from the liquid separation box 100, so that the connection between the negative pressure suction port 810 and the second liquid outlet 160 is more reliable.

[0049] In some embodiments, combining Figure 3 and Figure 4The venturi tube 800 is fixedly connected to the liquid separation box 100. Specifically, on the outer surface of the liquid separation box 100, the outer circumference of the second guide cylinder 162 is protruded outward by at least one mounting cylinder 163 and at least one positioning column 164. The venturi tube 800 also includes a second connecting structure 821 located on the side of the venturi tube body 820. The second connecting structure 821 is provided with a mounting hole 822 and a positioning hole 823. The positioning column 164 can pass through the positioning hole 823 and make the mounting hole 822 coaxial with the mounting cylinder 163. The mounting hole 822 can be detachably connected to the mounting cylinder 163 through a connecting piece. In this way, the venturi tube is easier to install and position on the liquid separation box, and by arranging the connecting structure 821 on the side wall of the venturi tube body 820, the connecting piece can have a larger operating space.

[0050] In some embodiments, in combination Figure 5 and Figure 6 There are two first through holes 120, two second through holes 220 and two liquid inlets 150. There are two liquid inlet ends and two liquid outlet ends of the liquid pump 400. The liquid inlets of the two liquid pumps 400 pass through the two first through holes 120 respectively and can be connected with the two second through holes 220 respectively. The two liquid outlet ends of the liquid pump 400 are connected with the two liquid inlets 150 respectively. It can be understood that the two first through holes 120, the second through holes 220 and the liquid inlets 150 are connected with each other respectively, thereby forming two independent flow channels.

[0051] Exemplarily, the liquid storage member 200 may be a liquid storage box (eg Figure 5 as shown) or a storage bottle (as Figure 1 As shown). The liquid storage box can be drawn out in the liquid separation box. When the detergent remaining in the liquid storage box is insufficient, the user can draw out the liquid storage box to add detergent to the liquid storage box. The liquid storage bottle can be placed on the liquid storage bottle rack. The liquid storage bottle rack can be drawn out in the liquid separation box. When the detergent remaining in the liquid storage bottle is insufficient, the user can draw out the liquid storage bottle rack, and the liquid storage bottle is drawn out accordingly. The user can replace the liquid storage bottle or add detergent to the liquid storage bottle.

[0052] Exemplarily, the liquid storage member 200 is a liquid storage box. A first chamber 211 and a second chamber 212 that are isolated from each other are formed inside the liquid storage box. The first chamber 211 is used to hold the main detergent, and the main function of the main detergent is to clean clothes. The second chamber 212 is used to hold the auxiliary detergent, and the function of the auxiliary detergent is to assist in cleaning clothes or achieve other functions. For example, the auxiliary detergent can be a special detergent for cleaning specific types of dirt. For example, the auxiliary detergent can be a fabric softener for making clothes softer. Among them, the two liquid inlets 150 are respectively formed as a first liquid inlet 151 and a second liquid inlet 152. The first liquid inlet 151 is communicated with the first chamber, and the second liquid inlet 152 is communicated with the second chamber. It can be understood that the first chamber and the first liquid inlet 151, and the second chamber and the second liquid inlet 152 are communicated through two independent liquid flow channels, so that the main detergent and the auxiliary detergent in the first chamber and the second chamber will not affect each other during the flow. At the same time, the distance between the first liquid inlet 151 and the second liquid outlet 160 is less than the distance between the second liquid inlet 152 and the second liquid outlet 160, which is more conducive to the negative pressure suction port 810 sucking the main detergent from the first liquid inlet 151, thereby improving the cleaning effect on clothes.

[0053] In some embodiments, in combination with Figure 1 and Figure 7 , the number of the first through hole 120, the second through hole 220 and the liquid inlet 150 is two each. Both the liquid inlet end and the liquid outlet end of the liquid pumping pump 400 have two. The liquid inlet ends of the two liquid pumping pumps 400 respectively pass through the two first through holes 120 and can be respectively communicated with the two second through holes 220. The two liquid outlet ends of the liquid pumping pump 400 are respectively communicated with the two liquid inlets 150. It can be understood that the two first through holes 120, the second through holes 220 and the liquid inlets 150 are respectively corresponding and communicated, thereby forming two independent flow channels.

[0054] Exemplarily, the liquid storage member 200 is a liquid storage bottle. A first chamber and a second chamber are respectively formed inside the two liquid storage bottles. That is, the liquid storage chambers 210 inside the liquid storage bottles respectively form the first chamber and the second chamber. A first chamber and a second chamber are respectively formed inside the two liquid storage bottles. The first chamber is used to hold the main detergent, and the main function of the main detergent is to clean clothes. The second chamber is used to hold the auxiliary detergent, and the function of the auxiliary detergent is to assist in cleaning clothes or achieve other functions. For example, the auxiliary detergent can be a special detergent for cleaning specific types of dirt. For example, the auxiliary detergent can be a fabric softener for making clothes softer. Among them, the two liquid inlets 150 respectively form a first liquid inlet 151 and a second liquid inlet 152. The first liquid inlet 151 is communicated with the first chamber, and the second liquid inlet 152 is communicated with the second chamber. It can be understood that the first chamber and the first liquid inlet 151 are connected through two independent liquid flow channels, and the second chamber and the second liquid inlet 152 are connected, so that the main detergent and the auxiliary detergent in the first chamber and the second chamber will not affect each other during the flowing process. At the same time, the distance between the first liquid inlet 151 and the second liquid outlet 160 is less than the distance between the second liquid inlet 152 and the second liquid outlet 160, which is more conducive to the negative pressure suction port 810 sucking the main detergent from the first liquid inlet 151, thereby improving the cleaning effect on clothes.

[0055] In some embodiments, such as Figure 8As shown, the liquid separation box 100 includes a liquid separation box body 181, a liquid separation box cover 182 and a top cover 183. The liquid separation box body 181 is fixedly connected to the liquid separation box cover 182, and the liquid separation box body 181 and the liquid separation box cover 182 enclose a liquid separation cavity 110. One side of the liquid separation box cover 182 facing away from the liquid separation cavity 110 has a fourth convex wall 1821, and the top cover 183 is fixedly connected to the fourth convex wall 1821. The fourth convex wall 1821 and the top cover 183 enclose a condensation cavity 184; and / or, the side of the top cover 183 facing the liquid separation cavity 110 is formed by the fourth convex wall 1821. The liquid separation box cover 182 is fixedly connected to the fourth convex wall 1821, and the fourth convex wall 1821 and the liquid separation box cover 182 enclose a condensation cavity 184; wherein, the liquid separation box cover 182 and the top cover 183 also enclose a pressure balance channel 186. The pressure balance channel 186 is connected to the washing cylinder through a pressure balance pipe 187. The pressure balance channel 186 is connected to the condensation cavity 184 and is used to condense the moisture in the humid air entering the condensation cavity 184 through the pressure balance pipe 187. It should be noted that when water is injected into the washing cylinder, if the washing cylinder forms a closed cavity, the air pressure in the washing cylinder will continue to increase, eventually making it difficult or even impossible to continue injecting water. It is necessary to connect the washing cylinder with the space where the liquid delivery device 10 is located through the pressure balance pipe 187, which will cause the humid air in the washing cylinder to enter the space where the liquid delivery device 10 is located. When the washing cylinder is in a drying state, the humid air connects the washing cylinder with the space where the liquid delivery device 10 is located through the pressure balance pipe 187. In this state, the amount of water vapor in the air is greater. If the humid air directly enters the space where the liquid delivery device 10 is located, the water vapor in the humid air will form droplets in the entire space after condensation. If the droplets adhere to the outer surface of the liquid storage member 200, when the user pulls out the liquid storage member 200, these droplets will drip on the ground or the user's body, resulting in a reduced user experience.

[0056] By forming a condensation cavity 184 between the liquid separation box cover 182 and the top cover 183 and connecting the pressure balance pipe 187 to the condensation cavity 184 through the pressure balance channel 186, in the first direction (the first direction is as Figure 13On the side shown by the arrow (in the figure), the air pressure balance channel 186 is located on the side of the liquid separation box 100 away from the liquid storage member 200, and the fourth condensation chamber 184 is located on the side of the liquid separation box cover 182 close to the air pressure balance channel 186. It can be understood that the fourth convex wall 1821 is located on the side of the liquid separation box cover 182 close to the air pressure balance channel 186, and / or the top cover 183 is located on the side of the liquid separation box 182 close to the air pressure balance channel 186. That is, the condensation chamber 184 is located on the side away from the liquid storage member 200. At the same time, a communication port 185 is provided inside the liquid separation box cover 182 located in the condensation chamber 184. The communication port 185 communicates the condensation chamber 184 and the liquid separation chamber 110, so that the water vapor in the humid air condenses into droplets in the condensation chamber 184 and then falls into the liquid separation chamber 110 through the communication port 185. And the condensation chamber 184 is located on the side away from the liquid storage member 200, so that the communication port 185 is far away from the liquid storage member 200, and the condensed droplets fall into the liquid separation chamber 110 from a position far away from the liquid storage member 200, thereby reducing the possibility of the droplets adhering to the surface of the liquid storage member 200, and reducing the possibility of the droplets falling on the ground or on the user's body when the user extracts the liquid storage member 200, improving the user experience.

[0057] In some embodiments, as Figure 9 shown, the fourth convex wall 1821 includes an outer peripheral convex wall 1822 and an inner convex wall 1823. The outer peripheral convex wall 1822 and the top cover 183 enclose to form the condensation chamber 184, and / or the outer peripheral convex wall 1822 and the liquid separation box cover 182 enclose to form the condensation chamber 184; the inner convex wall 1823 extends along a curve in the condensation chamber 184, and a condensation channel 1842 is formed in the condensation chamber 184. By making the inner convex wall 1823 extend along a curve, a condensation channel 1842 extending along a curve is formed, thereby increasing the surface area of the outer surface of the condensation channel 1842, enabling the condensation channel 1842 to contact the humid air entering the condensation chamber 184 more fully, and thus accelerating the condensation speed of the humid air; at the same time, heat exchange fins 1845 are convexly provided on the side walls of the outer peripheral convex wall 1822 and / or the inner convex wall 1823 adjacent to the condensation channel 1842, and a plurality of heat exchange fins 1845 are arranged at intervals along the extending direction of the condensation channel, thereby further increasing the surface area of the outer surface of the condensation channel 1842 and further accelerating the condensation speed of the humid air.

[0058] In some embodiments, as Figure 9 shown, there are a plurality of condensation channels 1842, and the distances between the projections of the plurality of condensation channels 1842 on the first plane and the projection of the air pressure balance channel 186 on the first plane are different. The condensation channel 1842 with the smallest distance is the first condensation channel 1846, that is, the first condensation channel 1846 is the one closest to the air pressure balance channel 186 among the condensation channels 1842. Among them, the first plane is a plane with the thickness direction of the liquid separation box cover 182 as the normal line.

[0059] Meanwhile, the liquid separation box cover 182 also has a water inlet joint 188 for connecting to a water inlet pipe. The water inlet joint 188 communicates with the first condensation channel 1846. The number of communication ports 185 on the part of the liquid separation box cover 182 located in the first condensation channel 1846 is greater than the number of communication ports 185 on the part of the liquid separation box cover 182 located in the second condensation channel 1847. The second condensation channel 1847 is the condensation channel 1842 other than the first condensation channel 1846 in the condensation channel 1842. It can be understood that the water inlet joint 188 can introduce water into the first condensation channel 1846 and flow into the liquid separation cavity 110 through the communication ports 185 located in the first condensation channel 1846, so that the detergent in the liquid separation cavity 110 is mixed with water. That is, the first condensation channel 1846 is not only used to achieve the condensation function but also used to achieve the water inlet function. By arranging more communication ports 185 in the first condensation channel 1846, the water flowing in from the water inlet joint 188 can flow into the liquid separation cavity 110 from multiple different positions, so that the detergent can be more fully mixed with water.

[0060] Optionally, as Figure 9 shown, the heat exchange fins 1845 are arranged in the second condensation channel 1847 and are arranged at intervals along the extension of the second condensation channel 1847. Thus, while further improving the condensation capacity of the second condensation channel 1847, no heat exchange fins 1845 are arranged in the first condensation channel 1846, thereby reducing the blocking effect of the heat exchange fins 1845 on the water flow flowing into the first condensation channel 1846 from the water inlet pipe and reducing the flow resistance of the liquid flow in the first condensation channel 1846. Optionally, the projection of the second condensation channel 1847 on the bottom surface of the liquid separation cavity 110 is located within the first liquid outlet 111, so that the liquid droplets condensed in the second condensation channel 1847 can directly drip out of the liquid separation cavity 110 through the first liquid outlet 111 after dripping into the liquid separation cavity 110, thereby further reducing the possibility that the condensed water dripping into the liquid separation cavity 110 splashes and drops on the outer surface of the liquid storage member 200.

[0061] Optionally, as Figure 9 shown, the liquid separation box cover 182 also has a third liquid outlet 189. The third liquid outlet 189 communicates with the first condensation channel 1846, and the third liquid outlet 189 can direct water to the sealing rubber cup of the washing machine door. The water entering the first condensation channel 1846 from the water inlet pipe can also flow out through the third liquid outlet 189 and wash the foam attached to the sealing bowl of the washing machine door.

[0062] In some embodiments, as Figure 10As shown, the outer surface of the side and / or bottom surface of the liquid separation box 100 has a pipeline fixing member 193, and the pipelines of the liquid delivery device 10 and the washing machine can be fixed to the outer surface of the liquid separation box 100 through the pipeline fixing member.

[0063] In some embodiments, as Figure 11 shown, the liquid delivery device 10 further includes: a liquid extraction joint 300, a liquid extraction pipe 500, and a liquid return pipe 600. The liquid extraction joint 300 is detachably connected to the liquid separation box 100. The liquid extraction joint 300 includes a tubular portion 310. The first end of the tubular portion 310 is located outside the liquid separation box 100, and the second end of the tubular portion 310 opposite to the first end extends into the liquid separation cavity 110 through the first through hole 120. The second end of the tubular portion 310 extends along the first direction and can communicate with the second through hole 220. It can be understood that in the state where the liquid storage member 200 is installed inside the liquid separation box 100, the second end of the liquid extraction joint 300 can extend into the second through hole 220 so that the liquid extraction joint 300 communicates with the liquid storage cavity 210, so that the liquid extraction joint 300 can extract the detergent in the liquid storage cavity 210 to the outside of the liquid separation box 100. Among them, the liquid extraction joint 300 can be detachably connected to the liquid separation box in various ways. Exemplarily, the liquid extraction joint 300 can be detachably connected to the liquid separation box 100 through a connection structure. Exemplarily, the tubular portion 310 can be detachably connected to the liquid separation box 100 by interference fit with the first through hole 120. The liquid extraction pipe 500 communicates the liquid inlet end of the liquid extraction pump 400 and the first end of the tubular portion 310. The liquid extraction pump 400 communicates with the liquid storage cavity 210 through the liquid extraction pipe 500, the tubular portion 310, and the liquid extraction pipe 700 (to be described below), so that the detergent in the liquid storage cavity 210 can be extracted. The liquid return pipe 600 communicates the liquid extraction pump 400 and the liquid inlet 150. The liquid extraction pump 400 disposed outside the liquid separation box 100 can input the detergent into the liquid separation cavity 110 through the liquid return pipe 600 from the liquid inlet 150. By disposing the liquid extraction pump 400 outside the liquid separation box 100 and detachably connecting it to the liquid separation box 100 through the liquid extraction joint 300 and the liquid extraction pipe 500, compared with the structure in which the housing of the liquid extraction pump 400 is integrated with the rear part of the housing of the liquid separation box 100, when the liquid extraction pump 400 needs to be repaired or replaced, the liquid extraction pump 400 can be disassembled more conveniently, thereby improving the convenience of maintenance and care of the liquid delivery device 10.

[0064] At the same time, as Figure 12As shown, the liquid dispensing device 10 further includes a suction pipe 700. The suction pipe 700 is located in the liquid storage chamber 210. The suction pipe 700 has opposite third and fourth ends. The third end communicates with the second through hole 220. The suction pipe 700 extends from the third end towards the bottom surface of the liquid storage chamber 210 to form the fourth end, and the fourth end has a suction port. Through the suction pipe 700, the detergent in the liquid storage chamber can be sucked, and the sucked detergent then enters the tubular portion 310.

[0065] It can be understood that the liquid pumping pump pumps out a specific amount of detergent stored in the liquid storage chamber through the liquid pumping pipe and sends it back to the liquid separation chamber through the liquid return pipe. Water enters the liquid separation chamber through the water inlet pipe. The detergent and water are mixed in the liquid separation chamber and sent to the washing tub from the liquid outlet of the liquid separation box. It can be understood that the liquid pumping pipe and the liquid return pipe may physically be the same pipe, but are divided into different pipe segments such as the liquid pumping pipe and the liquid return pipe according to their positions. For example, a part of this pipe is located inside the pump body of the liquid pumping pump. The upstream of the pipe located inside the pump body of the liquid pumping pump is called the liquid pumping pipe, and the downstream is called the liquid return pipe. Exemplarily, the liquid pumping pipe and the liquid return pipe may also be integrated with the liquid pumping pump physically, and the liquid pumping pipe and the liquid return pipe may also be separated from the liquid pumping pump physically, which is convenient for installing sensors on the liquid pumping pipe and the liquid return pipe to detect the fluid in the liquid pumping pipe and the liquid return pipe.

[0066] The embodiment of the present application further provides a washing device. The washing device may be, for example, a washing machine for washing clothes, or may also be a dishwasher for washing tableware. For the convenience of description, the washing device will be described below as a washing machine.

[0067] In some embodiments, as Figure 13 shown, the washing device 1 includes a housing 20, a washing tub 30, and a liquid dispensing device as shown in any one of Figures 1 to 12 . The housing 20 has an accommodation chamber 21. The washing tub 30 is located in the accommodation chamber 21. The liquid dispensing device 10 is located in the accommodation chamber 21. The first liquid outlet 111 communicates with the washing tub 30, so that the liquid dispensing device 10 can input the detergent into the washing tub 30.

[0068] The liquid dispensing device 10 is communicated with the water inlet pipe. The first liquid outlet 111 is communicated with the washing tub 30 through a transmission pipe. The first liquid outlet 111 and the transmission pipe are used to inject water or the detergent mixed with water into the washing tub 30, forming the main liquid inlet channel of the washing tub 30. Water and / or detergent can enter the washing tub 30 through this main liquid inlet channel, so that the liquid in the washing tub 30 can quickly reach the required liquid level. According to requirements, this liquid can be clean water, can be detergent, can be fabric softener, or can be a mixture of at least two of the above three liquids.

[0069] The Venturi tube main body 820 further includes an inlet section and a diffuser section. The inlet section is connected to the premixing water inlet pipe, and the diffuser section is connected to the spray pipe. The spray pipe forms a spray opening with one end of the washing cylinder 30. When water is passed into the Venturi tube 800 through the inlet section, the Venturi tube 800 can suck the detergent, water, and air in the liquid separation cavity 110 through the negative pressure suction port 810, so that the detergent can fully contact, mix, and foam with water and air, and then be transported to the spray opening through the spray pipe. Furthermore, the detergent is sprayed into the washing cylinder 30 from the spray opening, so that the detergent can fully foam before entering the washing cylinder and contacting the clothes, greatly improving the washing ratio.

[0070] Meanwhile, the washing device further includes a water inlet valve assembly. The water inlet valve assembly includes a first valve and a second valve. The first valve controls the on-off of the water inlet pipe, and the second valve controls the on-off of the premixing water inlet pipe. When the first valve is opened, water can enter the liquid separation cavity 110 through the water inlet pipe. When the second valve is opened, water can enter the inlet section of the Venturi tube 800 through the premixing water inlet pipe. By controlling the states of the first valve and the second valve, the flushing logic during detergent dispensing can be controlled. Furthermore, when detergent needs to be dispensed, the degree of pre-mixing and foaming of the detergent with water and air can be increased, and at the same time, the residue of the detergent in the liquid separation cavity and the water inlet pipeline can be reduced.

[0071] The embodiment of the present invention further provides a liquid dispensing method, which is applied to a washing device and is used to control the dispensing of detergent in the washing device. It should be noted that the execution subject of this liquid dispensing method can be the central controller of the washing device, or the controller of the liquid dispensing device in the washing device, or can include the central controller and the controller of the liquid dispensing device, and the liquid dispensing method is jointly realized through data interaction between the central controller and the controller of the liquid dispensing device.

[0072] In some embodiments, the liquid dispensing method is applied to a washing device as Figure 13 shown. Figure 14 FIG. is a schematic flow chart of a liquid dispensing method provided by an embodiment of the present invention. It can be understood that when the washing program runs to the step of liquid dispensing, liquid is dispensed. The process of this liquid dispensing method includes:

[0073] Step S101, control the first valve to open for a first duration and then control the first valve to close.

[0074] By opening the first valve, water can enter the liquid separation box through the water inlet pipe. At the same time, the water can discharge the air in the water inlet pipe and fill the water inlet pipe with water. It can be understood that in the subsequent control steps, the amount of water entering the liquid separation cavity needs to be controlled by the opening duration of the first valve. If there is air in the water inlet pipe, it may cause the amount of water entering the liquid separation cavity to be less than the target amount. Discharging the air in the water inlet pipe by opening the first valve can improve the control accuracy of the amount of water entering the liquid separation cavity through the water inlet pipe. At the same time, it can wet the liquid separation cavity before the detergent enters the liquid separation cavity, reducing the residue of the detergent in the liquid separation cavity. Exemplarily, the first duration is, for example, 5 seconds.

[0075] Step S102: Control the second valve to open.

[0076] To enable water to enter the Venturi tube through the premixing water pipe, so that the water can discharge the air in the Venturi tube and fill the Venturi tube with water. It can be understood that in the subsequent process, the opening duration of the second valve is required to control the amount of water entering the washing cylinder from the Venturi tube and the amount of detergent sucked by the Venturi tube. If there is air in the Venturi tube, it will cause the amount of water entering the washing cylinder in the subsequent control process to be less than the target amount, and it will also cause fluctuations in the negative pressure generated in the Venturi tube, resulting in a difference between the amount of detergent sucked by the Venturi tube and the target amount of detergent. Discharging the air in the premixing water pipe and the Venturi tube by opening the second valve can improve the control accuracy of the amount of water entering the washing cylinder through the water inlet pipe and the control accuracy of the amount of detergent sucked by the Venturi tube. Exemplarily, the second duration is, for example, 5 seconds.

[0077] Step S103: When the opening duration of the second valve reaches the second duration, control the liquid extraction pump to open, and when the liquid extraction pump operates for the third duration, control the second valve and the liquid extraction pump to close.

[0078] When the opening duration of the second valve reaches the second duration, it can be considered that the air in the premixing water pipe and the Venturi tube has been emptied. In this state, control the liquid extraction pump to open so that the liquid extraction pump can extract the detergent in the liquid storage cavity and make the detergent enter the liquid separation cavity. At the same time, the second valve is still in the open state, and the premixing water pipe continuously inputs water into the Venturi tube and makes the negative pressure suction port of the Venturi tube form a negative pressure, so that the detergent, water and air in the liquid separation cavity can be sucked through the second liquid outlet.

[0079] When the liquid extraction pump is opened and operates for the third duration, it can be considered that the target amount of detergent has been input into the washing cylinder. In this state, control the second valve and the liquid extraction pump to close, so as to stop spraying the detergent into the washing cylinder.

[0080] Step S104: Control the first valve to open, and control the first valve to close after the first valve is opened for the fourth duration.

[0081] It can be understood that it is difficult for the Venturi tube to completely suck out the detergent in the liquid separation cavity, and there may be residues of the detergent in the liquid separation cavity. By opening the first valve, water can enter the liquid separation cavity through the water inlet pipe, thereby flushing the residues of the detergent in the liquid separation cavity, and the remaining detergent can also be discharged into the washing cylinder through the first liquid outlet. While making more full use of the detergent entering the liquid separation cavity, the cleanliness of the liquid separation cavity is improved. Exemplarily, the fourth time duration can be 15 seconds.

[0082] Step S105: Control the second valve to open, and control the second valve to close after the second valve has been opened for a fifth time duration.

[0083] It can be understood that there may also be residues of the detergent in the Venturi tube. If the residues of the detergent continuously stay in the Venturi tube, it may lead to a decrease in the cleanliness of the Venturi tube and even cause the blockage of the Venturi tube. By controlling the second valve to open for a fifth time duration, clean water can be input into the Venturi tube through the premixing water pipe to flush and clean the Venturi tube, improve the cleanliness of the Venturi tube, and reduce the possibility of the Venturi tube being blocked. Exemplarily, the fifth time duration can be 30 seconds.

[0084] It should be noted that the execution order of step S104 and step S105 can be interchanged.

[0085] Step S106: Control the first valve and the second valve to open, and control the first valve and the second valve to close after the first valve and the second valve have been opened for a sixth time duration.

[0086] By opening the first valve and the second valve simultaneously, water can enter the washing cylinder through the water inlet pipe and the premixing water pipe at the same time, so that the liquid level in the washing cylinder can reach the preset water level more quickly.

[0087] The above is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention.

Claims

1. A liquid delivery device, characterized in that: The liquid delivery device comprises: A liquid separation box, wherein a liquid separation cavity is formed inside, and the liquid separation box is provided with a first through hole; the liquid separation box is provided with a liquid inlet, a first liquid outlet, and a second liquid outlet connected to the liquid separation cavity; A liquid storage member, wherein a liquid storage cavity is formed inside and at least partly located in the liquid separation cavity, and the liquid storage member is provided with a second through hole; A liquid pump is fixed to the liquid separation box, wherein the liquid inlet end of the liquid pump is connected to the liquid storage cavity through the first through hole and the second through hole, and the liquid outlet end of the liquid pump is connected to the liquid inlet; A venturi tube, wherein the venturi tube is fixedly connected to the liquid separation box, the venturi tube comprises a funnel-shaped structure and a venturi tube body, the contraction section of the venturi tube body is connected to the funnel-shaped structure near the throat, and a negative pressure suction port is formed at the maximum opening of the funnel structure; the negative pressure suction port is connected to the second liquid outlet.

2. The liquid delivery device according to claim 1, characterized in that: The outer surface of the bottom surface of the liquid separating box is protrudingly provided with a second guide cylinder having a bottom surface and a side surface. In the thickness direction parallel to the bottom surface of the liquid separating box and in the thickness direction perpendicular to the bottom surface of the liquid separating box, the second guide cylinder protrudes from the bottom surface of the liquid separating box. A second liquid outlet channel connected to the liquid separating cavity is formed in the second guide cylinder. One end of the second liquid outlet channel connected to the liquid separating cavity forms the second liquid outlet port. In the thickness direction perpendicular to the bottom surface of the liquid separating box, the second liquid outlet port is located on the bottom surface and / or side surface of the second guide cylinder on one side close to the liquid separating box. In the thickness direction parallel to the bottom surface of the liquid separating box, at least the portion of the funnel-shaped structure close to the negative pressure suction port is located on the side of the second guide cylinder away from the liquid separating box.

3. The liquid delivery device according to claim 2, characterized in that: At least one mounting tube and at least one positioning column are protruded outwardly from the outer circumference of the second guide tube on the outer surface of the liquid separation box. The venturi tube also includes a second connecting structure located on the side wing of the venturi tube body. The second connecting structure is provided with a mounting hole and a positioning hole. The positioning column can pass through the positioning hole and make the mounting hole coaxial with the mounting tube. The mounting hole can be detachably connected to the mounting tube through a connecting piece.

4. The liquid delivery device according to any one of claims 1 to 3, characterized in that: The liquid storage member is a liquid storage box, and a first cavity and a second cavity isolated from each other are formed inside the liquid storage box; The number of the liquid inlet, the first through hole, the second through hole, the liquid outlet, and the liquid inlet is two, the liquid pump is connected to the first cavity and the second cavity through the two first through holes and the two second through holes respectively, and the liquid outlet of the liquid pump is connected to the two liquid inlets respectively; The two liquid inlets include a first liquid inlet and a second liquid inlet spaced apart from each other; Wherein, the distance between the second liquid outlet and the first liquid inlet is smaller than the distance between the second liquid outlet and the second liquid inlet; the first liquid inlet is connected to the first cavity, and the first cavity is used to hold the main detergent.

5. The liquid delivery device according to any one of claims 1 to 3, characterized in that: The liquid storage member is a liquid storage bottle, the first through hole, the second through hole, the liquid inlet and the liquid storage bottle are two in number, and the liquid storage cavities inside the two liquid storage bottles form a first cavity and a second cavity; The two liquid inlet ends are respectively connected to the first cavity and the second cavity through the two first through holes and the two second through holes; the two liquid outlet ends are respectively connected to the two liquid inlets; The two liquid inlets include a first liquid inlet and a second liquid inlet spaced apart from each other; Wherein, the distance between the second liquid outlet and the first liquid inlet is smaller than the distance between the second liquid outlet and the second liquid inlet; the first liquid inlet is connected to the first cavity, and the first cavity is used to hold the main detergent.

6. The liquid delivery device according to claim 1, characterized in that: The liquid separation box comprises a liquid separation box body, a liquid separation box cover and a top cover; The liquid separation box body is fixedly connected to the liquid separation box cover, and the liquid separation box body and the liquid separation box cover surround and form the liquid separation cavity; The liquid separation box cover has a fourth convex wall on one side facing away from the liquid separation chamber, the top cover is fixedly connected to the fourth convex wall, and the fourth convex wall and the top cover surround a condensation chamber; and / or the top cover has a fourth convex wall on one side facing the liquid separation chamber, the liquid separation box cover is fixedly connected to the fourth convex wall, and the fourth convex wall and the liquid separation box cover surround a condensation chamber; The liquid separation box cover is also surrounded by the top cover to form an air pressure balance channel, the air pressure balance channel is connected to the washing drum through an air pressure balance pipe, and the air pressure balance channel is connected to the condensation chamber, and is used to condense the moisture in the hot and humid air entering the condensation chamber through the air pressure balance pipe; in the first direction, the air pressure balance channel is located on a side of the liquid separation box away from the liquid storage member, and the condensation chamber is located on a side of the liquid separation box cover close to the air pressure balance channel; A communication port is formed in the portion of the liquid separation box cover located in the condensation chamber, and the communication port communicates the condensation chamber and the liquid separation chamber.

7. The liquid delivery device according to claim 6, characterized in that: The fourth convex wall includes an outer convex wall and an inner convex wall, the outer convex wall and the top cover surround the condensation chamber, and / or the outer convex wall and the liquid separation box cover surround the condensation chamber; The inner convex wall extends along a curve in the condensation cavity to form a condensation channel in the condensation cavity; Heat exchange fins are protrudingly provided on the side walls of the outer convex wall and / or the inner convex wall adjacent to the condensation channel, and a plurality of the heat exchange fins are arranged at intervals along the extension direction of the condensation channel.

8. The liquid delivery device according to claim 7, characterized in that: There are multiple condensation channels, and the distances between the projections of the multiple condensation channels on the first plane and the projections of the air pressure balance channel on the first plane are different. The condensation channel with the smallest distance is the first condensation channel. The liquid separation box cover also has a water inlet pipe joint, which is connected to the first condensation channel, wherein the first plane is a plane with the thickness direction of the liquid separation box cover as a normal line; The number of connecting ports on the portion of the liquid separation box cover located in the first condensation channel is greater than the number of connecting ports on the portion of the liquid separation box cover located in the second condensation channel, and the second condensation channel is the condensation channel among the condensation channels except the first condensation channel; and / or, the plurality of heat exchange fins are spaced apart along the extension direction of the second condensation channel, and the second condensation channel is the condensation channel among the condensation channels except the first condensation channel.

9. The liquid delivery device according to claim 1, characterized in that: The liquid delivery device also includes: A liquid extraction joint, detachably connected to the liquid separation box, comprising a tubular portion, a first end of the tubular portion being located outside the liquid separation box, a second end of the tubular portion opposite to the first end extending into the liquid separation chamber through the first through hole, and the second end of the tubular portion being able to communicate with the second through hole; A liquid extraction pipe, the liquid extraction pipe is connected to a liquid inlet end of the liquid extraction pump and a first end of the tubular portion; A liquid return pipe, the liquid return pipe connecting the liquid outlet of the liquid pump and the liquid inlet; A suction tube is located in the liquid storage cavity, the suction tube has a third end and a fourth end opposite to each other, the third end is connected to the second through hole, the suction tube extends from the third end to the bottom surface of the liquid storage cavity to form the fourth end, and the fourth end has a suction port.

10. A washing device, characterized in that: The washing device comprises: A housing, wherein the housing forms a receiving cavity; a washing drum, the washing drum being located in the accommodating cavity; The liquid delivery device according to any one of claims 1 to 9, wherein the venturi tube body further comprises an inlet section and a diffuser section, wherein the inlet section is connected to a premixed water inlet pipe, the diffuser section is connected to a spray pipe, and one end of the spray pipe connected to the washing tub forms a spray port; the liquid delivery device is connected to the water inlet pipe, and the first liquid outlet is connected to the washing tub through a transmission pipe; The water inlet valve assembly comprises a first valve and a second valve, wherein the first valve controls the on-off of the water inlet pipe, and the second valve controls the on-off of the premixed water inlet pipe.

11. A method for delivering liquid, characterized in that: The liquid delivery method is applied to the washing device according to claim 10, and the liquid delivery method comprises: After controlling the first valve to be opened for a first time period, controlling the first valve to be closed so that water can flow into the water inlet pipe; Controlling the second valve to open so that water enters the Venturi tube through the premixed water pipe; When the second valve is opened for a second time, the liquid pump is controlled to be opened so that detergent enters the liquid separation chamber, and when the liquid pump is operated for a third time, the second valve and the liquid pump are controlled to be closed; Controlling the first valve to open, and controlling the first valve to close after the first valve is opened for a fourth time period; Controlling the second valve to open, and controlling the second valve to close after the second valve is opened for a fifth time period; The first valve and the second valve are controlled to be opened, and the first valve and the second valve are controlled to be closed after the first valve and the second valve are opened for a sixth time period, so that the liquid level in the washing tub reaches a preset water level.

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