Liquid dispensing device, washing device, and liquid dispensing method

Abstract

The present disclosure provides a liquid dispensing device, a washing device, and a liquid dispensing method. The liquid dispensing device comprises: a liquid dispensing box, wherein a liquid dispensing cavity is formed inside the liquid dispensing box, the liquid dispensing box is provided with a first through hole, the liquid dispensing box is provided with a liquid inlet, and a first liquid outlet and a second liquid outlet that are in communication with the liquid dispensing cavity; a liquid storage member, wherein a liquid storage cavity is formed inside the liquid storage member, at least part of the liquid storage member is located in the liquid division cavity, and the liquid storage member is provided with a second through hole; a liquid suction pump fixed to the liquid dispensing box, wherein a liquid inlet end of the liquid suction pump is in communication with the liquid storage cavity by means of the first through hole and the second through hole, and a liquid outlet end of the liquid suction pump is in communication with the liquid inlet; and a Venturi tube, wherein the Venturi tube is fixedly connected to the liquid dispensing box, the Venturi tube comprises a funnel-shaped structure and a Venturi tube main body, the part of a constricted section of the Venturi tube main body near a throat is connected to the funnel-shaped structure, the funnel-shaped structure is provided with the largest opening, a negative pressure suction port is formed at the largest opening, and the negative pressure suction port is in communication with the second liquid outlet. In this way, a detergent can be more thoroughly mixed with clothes.

Description

Liquid dispensing device, washing device and liquid dispensing method Cross-reference to Related Applications

[0001] The present disclosure claims priority to Chinese Patent Application No. 202411240782.6, filed on September 04, 2024, and Chinese Patent Application No. 202510333822.X, filed on March 20, 2025, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0002] The present disclosure relates to the field of washing, and in particular to a liquid dispensing device, a washing device and a liquid dispensing method. BACKGROUND

[0003] A washing machine with an automatic detergent dispensing function is provided with a liquid dispensing device, which can input a corresponding type of washing liquid into a washing drum according to requirements. However, the mixing of the washing agent dispensed by the related washing device and the clothes is not sufficient, resulting in poor washing effect. SUMMARY

[0004] The present disclosure provides a liquid dispensing device, a washing device and a liquid dispensing method, which are used to solve the technical problem of how to make the mixing of the washing agent and the clothes more sufficient, thereby improving the washing effect.

[0005] The present disclosure provides a liquid dispensing device, which comprises a liquid distribution box, a liquid storage member, a liquid pumping device and a Venturi tube. The liquid distribution box has a liquid distribution cavity formed inside, and is provided with a liquid inlet, a first liquid outlet and a second liquid outlet which are in communication with the liquid distribution cavity, and is provided with a first through hole. The liquid storage member has a liquid storage cavity formed inside, is located at least partially in the liquid distribution cavity, and is provided with a second through hole. The liquid pumping device is fixed to the liquid distribution box, and has a liquid inlet end and a liquid outlet end. The liquid inlet end of the liquid pumping device is in communication with the liquid storage cavity through the first through hole and the second through hole. The liquid outlet end of the liquid pumping device is in communication with the liquid inlet. The Venturi tube is fixedly connected with the liquid distribution box, and comprises a funnel-shaped structure and a Venturi tube body. One end of the Venturi tube body is an inlet section, the other end of the Venturi tube body is a diffusion section, and the Venturi tube body has a contraction section formed by contraction of the tube diameter between the inlet section and the diffusion section. A throat is formed at a position of the contraction section close to the diffusion section. The part of the contraction section of the Venturi tube body close to the throat is connected with the funnel-shaped structure. The funnel-shaped structure has a maximum opening and forms a negative pressure suction port at the maximum opening. The negative pressure suction port is in communication with the second liquid outlet.

[0006] In some embodiments, the outer surface of the bottom of the liquid separation box is convexly provided with a second guide cylinder having a bottom and a side, the second guide cylinder protrudes from the bottom of the liquid separation box in the thickness direction of the bottom of the liquid separation box, and in the direction perpendicular to the thickness direction of the bottom of the liquid separation box, the second guide cylinder partially exceeds the bottom of the liquid separation box, a second liquid outlet channel is formed in the second guide cylinder and communicates with the liquid separation cavity, one end of the second liquid outlet channel communicates with the liquid separation cavity through the second liquid outlet, and at least the part of the funnel structure close to the negative pressure suction port is located in the part of the second guide cylinder away from the liquid separation box in the thickness direction of the bottom of the liquid separation box.

[0007] In some embodiments, at least one mounting cylinder and at least one positioning column are convexly provided on the outer surface of the liquid separation box along the outer periphery of the second guide cylinder, the Venturi tube further comprises 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 cylinder, and the mounting hole can be detachably connected with the mounting cylinder through a connecting piece.

[0008] In some embodiments, the liquid storage member is a liquid storage box, the inside of the liquid storage box is formed with a first cavity and a second cavity which are isolated from each other; the number of the liquid inlet end, the first through hole, the second through hole, the liquid outlet end, and the liquid inlet port is two, the liquid pump is communicated with the first cavity and the second cavity through the two first through holes and the two second through holes respectively, and the two liquid outlet ends of the liquid pump are communicated with the two liquid inlet ports respectively; the two liquid inlet ports include a first liquid inlet port and a second liquid inlet port which are spaced apart; wherein the distance between the second liquid outlet port and the first liquid inlet port is smaller than the distance between the second liquid outlet port and the second liquid inlet port; the first liquid inlet port is communicated with the first cavity, and the first cavity is used for containing a main detergent.

[0009] 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 port, and the liquid storage bottle is two, and the inside of the two liquid storage bottles is formed with a first cavity and a second cavity; the number of the liquid inlet end and the liquid outlet end is also two, the two liquid inlet ends are communicated with the first cavity and the second cavity through the two first through holes and the two second through holes respectively; the two liquid outlet ends are communicated with the two liquid inlet ports respectively; the two liquid inlet ports include a first liquid inlet port and a second liquid inlet port which are spaced apart; wherein the distance between the second liquid outlet port and the first liquid inlet port is smaller than the distance between the second liquid outlet port and the second liquid inlet port; the first liquid inlet port is communicated with the first cavity, and the first cavity is used for containing a main detergent.

[0010] In some embodiments, 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 with the liquid separation box cover, and the liquid separation box body and the liquid separation box cover enclose the liquid separation cavity; a fourth convex wall is arranged on the side of the liquid separation box cover away from the liquid separation cavity, the top cover is fixedly connected with the fourth convex wall, and the fourth convex wall and the top cover enclose the condensation cavity; and / or, a fourth convex wall is arranged on the side of the top cover facing the liquid separation cavity, the liquid separation box cover is fixedly connected with the fourth convex wall, and the fourth convex wall and the liquid separation box cover enclose the condensation cavity; wherein the liquid separation box cover and the top cover further enclose the gas pressure balance channel, the gas pressure balance channel is connected with the washing drum through a gas pressure balance pipe, the gas pressure balance channel is connected with the condensation cavity, and is used for condensing the moisture in the hot and humid air entering the condensation cavity through the gas pressure balance pipe; in the first direction, the gas pressure balance channel is located on the side of the liquid separation box away from the liquid storage part, and the condensation cavity is located on the side of the liquid separation box cover close to the gas pressure balance channel; the liquid separation box cover is provided with a communication port located in the condensation cavity, and the communication port connects the condensation cavity and the liquid separation cavity.

[0011] In some embodiments, the fourth convex wall comprises a peripheral convex wall and an internal convex wall, the peripheral convex wall and the top cover enclose the condensation cavity, and / or the peripheral convex wall and the liquid separation box cover enclose the condensation cavity; the internal convex wall extends along a curve in the condensation cavity, and forms a condensation channel in the condensation cavity; the side of the peripheral convex wall and / or the internal convex wall adjacent to the condensation channel is provided with heat exchange fins, and a plurality of heat exchange fins are arranged at intervals along the extension direction of the condensation channel.

[0012] In some embodiments, the condensation channel has a plurality of condensation channels, the distance between the projection of the plurality of condensation channels on a first plane and the projection of the gas pressure balance channel on the first plane is different, the condensation channel with the smallest distance is a first condensation channel, the liquid separation box cover is further provided with a water inlet pipe joint, and the water inlet pipe joint is connected 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 the part of the liquid separation box cover located in the first condensation channel is greater than the number of communication ports on the part of the liquid separation box cover located in a second condensation channel, and the second condensation channel is the condensation channel other than the first condensation channel among the plurality of condensation channels; and / or, a plurality of heat exchange fins are arranged at intervals along the extension direction of the second condensation channel, and the second condensation channel is the condensation channel other than the first condensation channel among the plurality of condensation channels.

[0013] In some embodiments, the liquid dispensing device further comprises a liquid extraction connector detachably connected to the liquid distribution box, the liquid extraction connector comprising a tubular portion, a first end of the tubular portion being located outside the liquid distribution box, a second end of the tubular portion opposite to the first end being extended into the liquid distribution cavity through the first through hole, the second end of the tubular portion being capable of communicating with the second through hole; a liquid extraction pipe communicating the liquid extraction pump with the first end of the tubular portion; a liquid return pipe communicating the liquid extraction pump with the liquid inlet; and a suction pipe located in the liquid storage cavity, the suction pipe having opposite third and fourth ends, the third end communicating with the second through hole, the suction pipe extending from the third end to the fourth end towards the bottom surface of the liquid storage cavity, the fourth end having a suction opening.

[0014] The present disclosure further provides a washing device, comprising a housing forming a containing cavity, a washing drum located in the containing cavity, a liquid dispensing device as provided in the above embodiments, the Venturi tube body further comprising an inlet section and a diffusion section, the inlet section being connected to a premix water inlet pipe, the diffusion section being connected to a spray pipe, one end of the spray pipe communicating with the washing drum forming a spray opening, a water inlet pipe connected to the liquid dispensing device, the first liquid outlet communicating with the washing drum through a transmission pipe, and a water inlet valve assembly comprising a first valve and a second valve, the first valve controlling the opening and closing of the water inlet pipe, and the second valve controlling the opening and closing of the premix water inlet pipe.

[0015] The present disclosure further provides a liquid dispensing method applied to the washing device as provided in the above embodiments, the liquid dispensing method comprising: controlling the first valve to open for a first time duration and then controlling the first valve to close, so as to allow water to enter the water inlet pipe; controlling the second valve to open, so as to allow water to enter the Venturi tube through the premix water pipe; when the second valve is opened for a second time duration, controlling the liquid extraction pump to open, so as to allow the washing agent to enter the liquid distribution cavity, and after the liquid extraction pump is operated for a third time duration, controlling the second valve and the liquid extraction pump to close; controlling the first valve to open, and after the first valve is opened for a fourth time duration, controlling the first valve to close; controlling the second valve to open, and after the second valve is opened for a fifth time duration, controlling the second valve to close; and controlling the first valve and the second valve to open, and after the first valve and the second valve are opened for a sixth time duration, controlling the first valve and the second valve to close, so as to allow the liquid level in the washing drum to reach a preset water level.

[0016] The present disclosure provides a liquid dispensing device, which comprises a liquid distribution box with a liquid distribution cavity formed inside, a liquid storage member located inside the liquid distribution box and having a liquid storage cavity formed inside, and a liquid pumping device located outside the liquid distribution box, wherein the liquid distribution box has a first through hole, the liquid storage member has a second through hole, the liquid inlet end of the liquid pumping device is communicated with the liquid storage cavity through the first through hole, the second through hole and a suction pipe, the liquid distribution box has a liquid inlet and a first liquid outlet, and the liquid outlet end of the liquid pumping device is communicated with the liquid inlet. In addition, the liquid dispensing device further comprises a Venturi tube, which is fixedly connected with the liquid distribution box. The Venturi tube comprises a funnel structure and a Venturi tube body, and the part of the contraction section of the Venturi tube body near the throat is connected with the funnel structure. The funnel structure has a maximum opening and forms a negative pressure suction port at the maximum opening, and the negative pressure suction port is communicated with the second liquid outlet. Therefore, while the liquid dispensing device passes the detergent mixed with water through the first liquid outlet into the washing drum, the detergent mixed with water is also sprayed into the washing drum through the second liquid outlet and the Venturi tube, so that the detergent and the clothes in the washing drum are more fully mixed, thereby improving the washing effect. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 is a structural schematic diagram of a liquid dispensing device provided by an embodiment of the present disclosure;

[0018] Fig. 2 is an assembly schematic diagram of a liquid distribution box and a Venturi tube in the liquid dispensing device provided by an embodiment of the present disclosure;

[0019] Fig. 3 is a structural schematic diagram of a liquid distribution box in the liquid dispensing device provided by an embodiment of the present disclosure;

[0020] Fig. 4 is a structural schematic diagram of a Venturi tube in the liquid dispensing device provided by an embodiment of the present disclosure;

[0021] Fig. 5 is an exploded view of a first liquid dispensing device provided by an embodiment of the present disclosure;

[0022] Fig. 6 is an assembly schematic diagram of a liquid distribution box and a liquid storage box in the liquid dispensing device provided by an embodiment of the present disclosure;

[0023] Fig. 7 is an assembly schematic diagram of a liquid distribution box and a liquid storage member in the liquid dispensing device provided by an embodiment of the present disclosure;

[0024] Fig. 8 is an exploded view of a liquid distribution box in the liquid dispensing device provided by an embodiment of the present disclosure;

[0025] Fig. 9 is a structural schematic diagram of a liquid distribution box body in the liquid dispensing device provided by an embodiment of the present disclosure;

[0026] Fig. 10 is a structural schematic diagram of another liquid distribution box in the liquid dispensing device provided by an embodiment of the present disclosure;

[0027] FIG. 11 is an exploded view of another liquid delivery device according to an embodiment of the present disclosure;

[0028] FIG. 12 is an assembly view of a liquid storage member and a liquid suction pipe in a liquid delivery device according to an embodiment of the present disclosure;

[0029] FIG. 13 is a structural view of a washing device according to an embodiment of the present disclosure;

[0030] FIG. 14 is a flowchart of a liquid delivery method according to an embodiment of the present disclosure.

[0031] Reference signs: 1, washing device; 10, liquid delivery 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, mounting cylinder; 164, positioning column; 165, mounting 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 fin; 1846, first condensation channel; 1847, second condensation channel; 185, communication port; 186, air pressure balance channel; 187, air pressure balance pipe; 188, water inlet pipe 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 suction joint; 310, tubular portion; 400, liquid suction pump; 500, liquid suction pipe; 600, liquid return pipe; 700, suction pipe; 741, suction port; 800, Venturi tube; 810, negative pressure suction port; 820, Venturi tube body; 821, connecting structure; 822, mounting hole; 823, positioning hole; 830, funnel-shaped structure; 901, third groove; 20, shell; 21, containing cavity; 30, washing cylinder. DETAILED DESCRIPTION

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

[0033] In the specific embodiments, various specific technical features described can be combined in any suitable manner without contradiction, for example, different embodiments and technical solutions can be formed by combining different specific technical features. In order to avoid unnecessary repetition, various possible combinations of various specific technical features in the present disclosure are not described again.

[0034] In the following description, the terms "first," "second," etc., are used merely to distinguish different objects and do not indicate that the objects have the sameness or relationship. It should be understood that the directional descriptions "above," "below," "outside," and "inside" refer to the orientation under normal use conditions, while "left" and "right" refer to the left and right directions shown in the corresponding diagrams, which may or may not be the left and right directions under normal use conditions.

[0035] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. The term "connection," unless otherwise specified, includes both direct and indirect connections.

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

[0037] In some embodiments, referring to Figures 1 and 2, the liquid dispensing device 10 includes a dispensing box 100, a liquid storage device 200, a liquid pump 400, and a venturi tube 800.

[0038] As shown in FIG. 1 in combination with FIG. 2 and FIG. 7, the dispensing box 100 has a dispensing cavity 110 formed inside, and the dispensing box 100 has a liquid inlet 150 and a first liquid outlet 111 which are in communication with the dispensing cavity 110, and the detergent can enter the dispensing cavity 110 through the liquid inlet 150 and be outputted through the first liquid outlet 111. In some embodiments, the dispensing box 100 also has a water inlet, and the detergent can be mixed with water in the dispensing box 100 and then outputted through the first liquid outlet 111 (at this time, the detergent is less likely to remain in the dispensing box 100 under the washing of water), so that the detergent can be more fully contacted with the clothes in the washing drum of the washing machine. The liquid storage member 200 has a liquid storage cavity 210 formed inside, and the liquid storage cavity 210 is used to store the detergent, and the liquid storage member 200 can slide relative to the dispensing box 100 in a first direction (the first direction is shown by an arrow in FIG. 1), so that the user can conveniently supplement the detergent into the liquid storage member 200 when the liquid storage member 200 slides out relative to the dispensing box 100, or the liquid storage member 200 can be taken out of or put into the dispensing box 100 by moving the liquid storage member 200 relative to the dispensing box 100.

[0039] The liquid storage member 200 has a second through hole 220 which is parallel to the first direction in the center axis. The liquid suction pump 400 is located outside the dispensing box 100, and the liquid suction end of the liquid suction pump 400 is in communication with the liquid storage cavity 210 through the first through hole 120 and the second through hole 220, so that the liquid suction pump 400 can suck the detergent out of the liquid storage cavity 210. The liquid outlet end of the liquid suction pump 400 is in communication with the liquid inlet 150 of the dispensing box 100, so that the detergent sucked out by the liquid suction pump 400 can enter the dispensing cavity 110 through the liquid inlet 150, and then the detergent can be outputted through the first liquid outlet 111. The liquid suction end of the liquid suction pump 400 can be directly communicated with the first through hole 120, or indirectly communicated with the first through hole 120 through a pipeline. The liquid outlet end of the liquid suction pump 400 can be directly communicated with the liquid inlet 150, or indirectly communicated with the liquid inlet 150 through a pipeline.

[0040] As shown in FIG. 2, the Venturi tube 800 is fixedly connected to the liquid distribution box 100, and the Venturi tube 800 includes a Venturi tube body 820 and a funnel structure 830. One end of the Venturi tube body 820 is an inlet section, and the other end of the Venturi tube body 820 is a diffusion section. The Venturi tube body 820 has a contraction section with a gradually decreasing diameter between the inlet section and the diffusion section. A throat is formed at a position of the contraction section close to the diffusion section. The funnel structure 830 is connected to a portion of the contraction section close to the throat. The funnel structure 830 and the Venturi tube body 820 form an included angle. An end of the funnel structure 830 away from the Venturi tube body 820 has a maximum opening of the funnel structure 830, and a negative pressure suction port 810 is formed at the maximum opening. The negative pressure suction port 810 is in communication with the second liquid outlet 160 in FIG. 3. In the case where liquid (flowing from the inlet section and flowing out of the diffusion section) flows in the Venturi tube body 820, the negative pressure suction port 810 forms a negative pressure, and liquid and gas in the liquid distribution box 100 are sucked into the Venturi tube body 820 through the negative pressure suction port 810 and flow out of the diffusion section.

[0041] The present disclosure provides a liquid dispensing device, which includes a liquid distribution box having a liquid distribution cavity formed therein, a liquid storage member located in the liquid distribution box and having a liquid storage cavity formed therein, and a liquid suction pump located outside the liquid distribution box. The liquid distribution box has a first through hole, the liquid storage member has a second through hole, and a liquid inlet end of the liquid suction pump is in communication with the liquid storage cavity through the first through hole, the second through hole, and a suction pipe (to be described below) located in the liquid storage cavity. The liquid distribution box has a liquid inlet port, and a liquid outlet end of the liquid suction pump is in communication with the liquid inlet port. Under the action of the liquid suction pump, the detergent is sucked out of the liquid storage cavity through the suction pipe, reaches outside the liquid distribution box through the first through hole and the second through hole, and then enters the liquid distribution box from the liquid inlet port. The liquid distribution box also has a water inlet pipe connector (for example, provided on a cover of the liquid distribution box) for connecting a water inlet pipe, a first liquid outlet port, and a second liquid outlet port. The first liquid outlet port is connected to a washing drum, and the second liquid outlet port is connected to a negative pressure suction port of a Venturi tube.

[0042] It should be noted that the communication in the embodiments of the present application can be understood in a broad sense, that is, the communication can be understood as being connected and being in fluid communication, or the communication can be understood as being connected and being in fluid communication under certain conditions. In some embodiments, an umbrella valve can be provided in the suction pipe. When the liquid storage member 200 is entirely located in the liquid distribution cavity 110 and the liquid suction pump 400 is working, the umbrella valve in the suction pipe is opened, the liquid inlet end of the liquid suction pump is in communication with the liquid storage cavity through the first through hole, the second through hole, and the suction pipe located in the liquid storage cavity, and the detergent in the liquid storage cavity enters the liquid suction pump. When the liquid storage member 200 is entirely located in the liquid distribution cavity 110 but the liquid suction pump 400 is not working, or when the liquid storage member 200 is at least partially drawn out of the liquid distribution cavity 110 by a user, the umbrella valve in the suction pipe is closed, so that the liquid storage member 200 is prevented from leaking in a non-suction state.

[0043] In addition, the liquid dispensing device further comprises a Venturi tube fixedly connected with the liquid distribution box. The Venturi tube comprises a funnel structure and a Venturi tube body. The part of the converging section of the Venturi tube body close to the throat is connected with the funnel structure. The funnel structure forms a negative pressure suction port at the largest opening. The negative pressure suction port is in communication with the second liquid outlet. In the case that the liquid is introduced into the Venturi tube body 820, the negative pressure suction port 810 forms a negative pressure. The liquid and gas in the liquid distribution box 100 are sucked into the Venturi tube body through the negative pressure suction port 810 and flow out of the diffuser section. The diffuser section of the Venturi tube is connected with a spray pipe. One end of the spray pipe is connected with the diffuser section of the Venturi tube, and the other end of the spray pipe is connected with the washing drum. The end of the spray pipe in communication with the washing drum forms a spray port. Therefore, while the liquid dispensing device 10 introduces the detergent mixed with water into the washing drum through the first liquid outlet 111, the mixture of the detergent, water and air in the liquid distribution box is sucked into the Venturi tube 800 through the second liquid outlet 160 under the action of the negative pressure, is fully mixed and foamed, and then the mixture is sprayed into the washing drum through the spray pipe connected with the diffuser section of the Venturi tube, so that the detergent can be fully foamed before entering the washing drum and contacting the clothes, thereby greatly improving the washing ratio.

[0044] In some embodiments, in combination with FIGS. 2 and 3, the outer surface of the bottom of the liquid distribution box 100 is convexly provided with a second guide cylinder 162 having a bottom and a side. In the thickness direction of the bottom of the liquid distribution box 100 (i.e. the direction perpendicular to the bottom of the liquid distribution box 100), the second guide cylinder 162 protrudes from the outer surface of the bottom of the liquid distribution box 100, and in the direction perpendicular to the thickness direction of the bottom of the liquid distribution box 100 (i.e. the direction parallel to the bottom of the liquid distribution box 100), the second guide cylinder 162 partially exceeds the bottom of the liquid distribution box 100. A second liquid outlet channel 161 is formed in the second guide cylinder 162, and the second liquid outlet channel 161 is in communication with the liquid distribution cavity 110. In some embodiments, one end of the second liquid outlet channel 161 is in communication with the liquid distribution cavity 110 through the second liquid outlet 160. The second guide cylinder 162 not only protrudes from the liquid distribution box 100 in the thickness direction of the bottom of the liquid distribution box 100, but also laterally and partially exceeds the bottom of the liquid distribution box 100 in the direction perpendicular to the thickness direction, so that the second guide cylinder 162 is not completely located directly below the second liquid outlet 160, but is shifted in the lateral direction away from the liquid distribution box 100, so that the second guide cylinder 162 and the Venturi tube 800 can avoid other parts (which can be, for example, pipelines or wiring harnesses) of the liquid dispensing device 10 on the bottom of the liquid distribution box 100, thereby providing space for other parts of the liquid dispensing device 10 or parts used in cooperation with the liquid dispensing device 10.

[0045] The second guide cylinder 162 is displaced in the lateral direction away from the separation box 100, and the second liquid outlet 160 is only provided in the overlapping area of the bottom of the separation box 100 and the projection of the second guide cylinder 162 on the bottom of the separation box, so the second liquid outlet 160 is not coaxial with the second guide cylinder 162. In the direction perpendicular to the thickness direction of the bottom of the separation box 100, the second liquid outlet 160 is displaced towards the side of the separation box 100 provided with the liquid inlet 150 compared with the second guide cylinder 162. In addition, since the second guide cylinder 162 is also displaced in the lateral direction away from the separation box 100 and towards the liquid suction pump 400 to partially exceed the bottom of the separation box 100, a part of the second guide cylinder 162 cannot take the bottom of the separation box 100 as the bottom, but has its own independent bottom.

[0046] In some embodiments, the second liquid outlet 160 can be provided on the side or bottom of the second guide cylinder 162. In order to obtain a larger second liquid outlet, the second liquid outlet 160 can be provided on the side and bottom of the second guide cylinder. In this way, the communication area of the second liquid outlet 160 with the separation cavity 110 is increased, so that more detergent can flow out of the separation cavity 110 through the second liquid outlet 160.

[0047] In addition, in the thickness direction of the bottom of the separation box 100, the part of the funnel structure 830 close to the negative pressure suction port 810 of the separation box 100 is located in the part of the second guide cylinder 162 away from the separation box 100 (i.e. the funnel structure is fitted into the second guide cylinder, and the second guide cylinder accommodates the funnel structure), so that the communication between the negative pressure suction port 810 and the second guide cylinder 162 is more reliable.

[0048] In some embodiments, as shown in FIG. 3, the bottom of the separation box 100 further protrudes an installation plate 165, which extends in the direction perpendicular to the direction A, which is the thickness direction of the bottom of the separation box 100, and in the thickness direction of the bottom, a part of the second guide cylinder 162 protrudes from the outer surface of the bottom of the 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 bottom of the separation box 100, and the outer surface of the installation plate 165 forms at least part of the bottom of the second guide cylinder 162.

[0049] In some embodiments, as shown in FIG. 2 and FIG. 3, in the thickness direction of the bottom of the separation box 100, the part of the funnel structure 830 close to the negative pressure suction port 810 of the separation box 100 is located in the part of the second guide cylinder 162 away from the separation box 100, so that the communication between the negative pressure suction port 810 and the second guide cylinder 162 is more reliable.

[0050] In some embodiments, the Venturi tube 800 is fixedly connected to the liquid distribution box 100 in combination with FIG. 3 and FIG. 4. Specifically, at least one mounting cylinder 163 and at least one positioning column 164 are protruded outward from the outer circumference of the second guide cylinder 162 on the outer surface of the liquid distribution box 100, and the Venturi tube 800 further comprises a second connecting structure 821 located at the side wing 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, and the mounting hole 822 can be detachably connected with the mounting cylinder 163 through a connecting piece, so that the Venturi tube is easier to install and position on the liquid distribution box. By providing the second connecting structure 821 on the side wall of the Venturi tube body 820, the connecting piece can have a larger operation space.

[0051] In some embodiments, the number of the first through hole 120, the second through hole 220 and the liquid inlet 150 is two, the number of the liquid suction end of the liquid pump 400 and the liquid outlet end of the liquid pump 400 is two, the two liquid suction ends of the liquid pump 400 pass through the two first through holes 120 respectively and can communicate with the two second through holes 220 respectively, and the two liquid outlet ends of the liquid pump 400 communicate with the two liquid inlets 150 respectively. In other words, the two first through holes 120, the second through holes 220 and the liquid inlets 150 correspond to communication respectively, so as to form two independent flow channels.

[0052] In some embodiments, the liquid storage member 200 can be a liquid storage box (as shown in FIG. 5) or a liquid storage bottle (as shown in FIG. 1). The liquid storage box is pullably arranged in the liquid distribution box, when the remaining amount of the detergent in the liquid storage box is insufficient, the user can pull out the liquid storage box to supplement the washing liquid in the liquid storage box. The liquid storage bottle can be placed on the liquid storage bottle rack, the liquid storage bottle rack is pullably arranged in the liquid distribution box, when the remaining amount of the detergent in the liquid storage bottle is insufficient, the user can pull out the liquid storage bottle rack, the liquid storage bottle is pulled out with the liquid storage bottle rack, and the user can replace the liquid storage bottle or supplement the washing liquid in the liquid storage bottle.

[0053] In some embodiments, the liquid storage member 200 is a liquid storage box, and the liquid storage box has a first cavity 211 and a second cavity 212 formed therein and isolated from each other. The first cavity 211 is used to store a main detergent, and the main detergent is mainly used for cleaning clothes. The second cavity 212 is used to store an auxiliary detergent, and the auxiliary detergent is used to assist in cleaning clothes or to achieve other functions. In some embodiments, the auxiliary detergent can be a special detergent used for cleaning specific types of stains. In some embodiments, the auxiliary detergent can be a softener used to make clothes softer. The two liquid inlets 150 are a first liquid inlet 151 and a second liquid inlet 152. The first liquid inlet 151 is in communication with the first cavity 211, and the second liquid inlet 152 is in communication with the second cavity 212. The first cavity 211 and the first liquid inlet 151, and the second cavity 212 and the second liquid inlet 152 are connected by two independent liquid flow channels, so that the main detergent and the auxiliary detergent in the first cavity 211 and the second cavity 212 do not affect each other during flow. In addition, 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 to suck the main detergent from the first liquid inlet 151, thereby improving the cleaning effect on clothes.

[0054] In some embodiments, in combination with FIGS. 1 and 7, the number of the first through hole 120, the second through hole 220, and the liquid inlet 150 is two, the number of the liquid inlet end of the liquid pump 400 and the liquid outlet end of the liquid pump 400 is two, the two liquid inlet ends of the liquid pump 400 pass through the two first through holes 120 and can be in communication with the two second through holes 220, respectively, and the two liquid outlet ends of the liquid pump 400 are in communication with the two liquid inlets 150, respectively. In other words, the two first through holes 120, the second through holes 220, and the liquid inlets 150 are respectively connected in communication, thereby forming two independent flow channels.

[0055] In some embodiments, the liquid storage member 200 is a liquid storage bottle, and the first and second cavities are formed in the two liquid storage bottles, respectively, i.e., the liquid storage cavities 210 in the two liquid storage bottles form the first and second cavities, respectively. The first cavity is used to store a main detergent, which has a main function of cleaning clothes. The second cavity is used to store an auxiliary detergent, which has a function of assisting in cleaning clothes or achieving other functions. In some embodiments, the auxiliary detergent can be a special detergent used to clean a specific type of dirt. In some embodiments, the auxiliary detergent can be a softener used to make clothes softer. The two liquid inlets 150 are a first liquid inlet 151 and a second liquid inlet 152, respectively. The first liquid inlet 151 is in communication with the first cavity, and the second liquid inlet 152 is in communication with the second cavity. The first cavity and the first liquid inlet 151, and the second cavity and the second liquid inlet 152 are connected through two independent liquid flow channels, so that the main detergent and the auxiliary detergent in the first and second cavities do not affect each other during flow. In addition, 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 to suck in the main detergent from the first liquid inlet 151, thereby improving the cleaning effect on clothes.

[0056] In some embodiments, as shown in FIG. 8, the liquid distribution box 100 comprises a liquid distribution box body 181, a liquid distribution box cover 182 and a top cover 183, the liquid distribution box body 181 is fixedly connected with the liquid distribution box cover 182, and the liquid distribution box body 181 and the liquid distribution box cover 182 enclose a liquid distribution cavity 110. The side of the liquid distribution box cover 182 away from the liquid distribution cavity 110 is provided with a fourth convex wall 1821, the top cover 183 is fixedly connected with the fourth convex wall 1821, and 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 distribution cavity 110 is provided with a fourth convex wall 1821, the liquid distribution box cover 182 is fixedly connected with the fourth convex wall 1821, and the fourth convex wall 1821 and the liquid distribution box cover 182 enclose the condensation cavity 184. The liquid distribution box cover 182 also encloses the gas pressure balance channel 186 with the top cover 183, the gas pressure balance channel 186 communicates with the washing drum through the gas pressure balance pipe 187, the gas pressure balance channel 186 communicates with the condensation cavity 184, and is used for condensing the moisture in the humid hot air entering the condensation cavity 184 through the gas pressure balance pipe 187. It should be noted that when water is injected into the washing drum, if the washing drum forms a closed cavity, the air pressure in the washing drum will continuously increase, eventually causing difficulty or even inability to continue injecting water. In order to avoid this problem, the washing drum needs to be communicated with the space where the liquid dropping device 10 is located through the gas pressure balance pipe 187, but this will cause the humid air in the washing drum to enter the space where the liquid dropping device 10 is located. In the state of drying the washing drum, the humid hot air enters the space where the liquid dropping device 10 is located through the gas pressure balance pipe 187, and in this state, the amount of water vapor in the air is larger. If the humid air directly enters the space where the liquid dropping device 10 is located, the water vapor in the humid air will form liquid droplets after condensation in the entire space, and if the liquid droplets adhere to the outer surface of the liquid storage member 200, these liquid droplets will drop to the ground or the user's body when the user pulls out the liquid storage member 200, resulting in a decrease in the user's use experience.

[0057] By forming the condensation cavity 184 between the separation box cover 182 and the top cover 183, and making the air pressure balance pipe 187 communicate with the condensation cavity 184 through the air pressure balance channel 186, in the first direction (the first direction is shown by the arrow in FIG. 8), the air pressure balance channel 186 is located on the side of the separation box 100 away from the liquid storage member 200, and the condensation cavity 184 is located on the side of the separation box cover 182 close to the air pressure balance channel 186. In some embodiments, the fourth convex wall 1821 is located on the side of the 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 separation box cover 182 close to the air pressure balance channel 186, i.e., the condensation cavity 184 is located on the side away from the liquid storage member 200. In addition, the separation box cover 182 is provided with a communication port 185 inside the condensation cavity 184, which communicates the condensation cavity 184 and the separation cavity 110, so that the water vapor in the humid air condenses into liquid droplets in the condensation cavity 184 and then falls into the separation cavity 110 through the communication port 185, and the condensation cavity 184 is located on the side away from the liquid storage member 200, so that the communication port 185 is away from the liquid storage member 200, and the condensed liquid droplets fall into the separation cavity 110 from the position away from the liquid storage member 200, thereby reducing the possibility of the liquid droplets adhering to the surface of the liquid storage member 200, reducing the possibility of the liquid droplets falling on the ground or on the user when the user extracts the liquid storage member 200, and improving the user's experience.

[0058] In some embodiments, as shown in FIG. 9, the fourth convex wall 1821 includes a peripheral convex wall 1822 and an internal convex wall 1823. The peripheral convex wall 1822 and the top cover 183 surround to form the condensation cavity 184, and / or the peripheral convex wall 1822 and the separation box cover 182 surround to form the condensation cavity 184. The internal convex wall 1823 extends along a curve in the condensation cavity 184 to form a condensation channel 1842 in the condensation cavity 184. By making the internal convex wall 1823 extend along a curve to form a condensation channel 1842 extending along a curve, the surface area of the outer surface of the condensation channel 1842 is increased, and the condensation channel 1842 can be in more sufficient contact with the humid air entering the condensation cavity 184, thereby accelerating the condensation speed of the humid air. In addition, the side of the peripheral convex wall 1822 and / or the internal convex wall 1823 adjacent to the condensation channel 1842 is convexly provided with heat exchange fins 1845, and a plurality of heat exchange fins 1845 are arranged in the extension direction of the condensation channel, thereby further increasing the surface area of the outer surface of the condensation channel 1842 (or the contact area of the condensation channel 1842 with the humid air), and further accelerating the condensation speed of the humid air.

[0059] In some embodiments, as shown in FIG. 9, the condensation channels 1842 have projections on the first plane that are different from the projection of the air pressure balancing channel 186 on the first plane, the condensation channel 1842 with the smallest distance to the projection of the air pressure balancing channel 186 on the first plane is the first condensation channel 1846, i.e., the first condensation channel 1846 is the one closest to the air pressure balancing channel 186 among the condensation channels 1842, wherein the first plane is a plane with a normal in the thickness direction of the dispenser cover 182. In some embodiments, the first plane is the plane on which the dispenser cover 182 is located.

[0060] In addition, the dispenser cover 182 also has a water inlet connector 188 for connecting a water inlet pipe, the water inlet connector 188 is in communication with the first condensation channel 1846, the number of communication openings 185 on the portion of the dispenser cover 182 located in the first condensation channel 1846 is greater than the number of communication openings 185 on the portion of the dispenser cover 182 located in the second condensation channel 1847. The second condensation channel 1847 is a condensation channel 1842 among the condensation channels 1842 except the first condensation channel 1846. The water inlet connector 188 can guide water into the first condensation channel 1846 and flow into the dispensing cavity 110 through the communication openings 185 located in the first condensation channel 1846, so as to mix the detergent in the dispensing cavity 110 with water, i.e., 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 openings 185 in the first condensation channel 1846, the water flowing in from the water inlet connector 188 can flow into the dispensing cavity 110 from multiple different positions, so as to enable the detergent to be mixed with water more fully.

[0061] In some embodiments, as shown in FIG. 9, the heat exchange fins 1845 are arranged in the second condensation channel 1847 and are arranged at intervals along the extension direction of the second condensation channel 1847, while no heat exchange fins 1845 are arranged in the first condensation channel 1846, so as to further improve the condensation capacity of the second condensation channel 1847 while 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, thereby reducing the flow resistance of the liquid flow in the first condensation channel 1846. In some embodiments, the projection of the second condensation channel 1847 on the bottom of the dispensing cavity 110 is located in the first liquid outlet 111, so that the liquid droplets condensed in the second condensation channel 1847 directly drip out of the dispensing cavity 110 through the first liquid outlet 111 after dripping into the dispensing cavity 110, thereby further reducing the possibility of the condensed water dripping into the dispensing cavity 110 splashing and falling on the outer surface of the liquid storage member 200.

[0062] In some embodiments, as shown in FIG. 9, the liquid distribution box cover 182 further has a third liquid outlet 189, which is in communication with the first condensing channel 1846, and the third liquid outlet 189 is capable of guiding water to the sealing rubber bowl of the washing machine door. The water entering the first condensing channel 1846 through the water inlet pipe can also flow out of the third liquid outlet 189 and wash the foam adhered to the sealing rubber bowl of the washing machine door.

[0063] In some embodiments, as shown in FIG. 10, the outer surface of the side and / or bottom of the liquid distribution box 100 has a pipe fixing member 193, and the pipe of the liquid delivery device 10 and the washing machine can be fixed to the outer surface of the liquid distribution box 100 through the pipe fixing member 193.

[0064] In some embodiments, as shown in FIG. 11, the liquid dispensing device 10 further comprises a liquid suction connector 300, a liquid suction pipe 500, and a liquid return pipe 600. The liquid suction connector 300 is detachably connected to the liquid distribution box 100. The liquid suction connector 300 comprises a tubular portion 310, a first end of the tubular portion 310 is located outside the liquid distribution box 100, and a second end of the tubular portion 310 opposite to the first end is extended into the second through hole 220 from the first through hole 120 and is capable of communicating with the second through hole 220. In some embodiments, when the liquid storage member 200 is installed in the liquid distribution box 100, the second end of the liquid suction connector 300 is capable of extending into the second through hole 220 so as to make the liquid suction connector 300 communicate with the liquid storage chamber 210, thereby enabling the liquid suction connector 300 to suck the detergent in the liquid storage chamber 210 out of the liquid distribution box 100. The liquid suction connector 300 can be detachably connected to the liquid distribution box 100 in various ways. In some embodiments, the liquid suction connector 300 is detachably connected to the liquid distribution box 100 by a connecting structure. In other embodiments, the tubular portion 310 is detachably connected to the liquid distribution box 100 by interference fit with the first through hole 120. The liquid suction pipe 500 connects the liquid suction pump 400 and the first end of the tubular portion 310. The liquid suction pump 400 is capable of sucking the detergent in the liquid storage chamber 210 through the liquid suction pipe 500, the tubular portion 310, and the suction pipe 700 (to be described below). The liquid return pipe 600 connects the liquid suction pump 400 and the liquid inlet 150. The liquid suction pump 400 located outside the liquid distribution box 100 is capable of inputting the detergent into the liquid distribution chamber 110 through the liquid return pipe 600 and the liquid inlet 150. By locating the liquid suction pump 400 outside the liquid distribution box 100 and detachably connecting the liquid suction pump 400 to the liquid distribution box 100 through the liquid suction connector 300 and the liquid suction pipe 500, compared with the structure in which the housing of the liquid suction pump 400 is integrated with the rear part of the housing of the liquid distribution box 100, the liquid suction pump 400 can be more easily detached when it needs to be repaired or replaced, thereby improving the convenience of maintenance and care of the liquid dispensing device 10.

[0065] In addition, as shown in FIG. 12, the liquid dispensing device 10 further comprises a suction pipe 700 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 (i.e. the body thereof) extends from the third end to the fourth end towards the bottom surface of the liquid storage chamber 210, and the fourth end has a suction port. The detergent in the liquid storage chamber 210 can be sucked through the suction pipe 700, and the sucked detergent then enters the tubular portion 310.

[0066] It can be understood that the liquid pumping pump pumps out the specific amount of detergent stored in the liquid storage cavity through the liquid pumping pipe and sends it back to the liquid distribution cavity through the liquid returning pipe, the water inlet pipe enters water into the liquid distribution cavity, the detergent and water are mixed in the liquid distribution cavity, and the mixed liquid is sent to the washing drum from the liquid outlet of the liquid distribution box. It can be understood that the liquid pumping pipe and the liquid returning pipe can be physically the same pipe, but are divided into different pipe sections according to their positions. In some embodiments, part of the pipe is located in the pump body of the liquid pumping pump. The upstream of the pipe located in the pump body of the liquid pumping pump is called the liquid pumping pipe, and the downstream is called the liquid returning pipe. In some embodiments, the liquid pumping pipe and the liquid returning pipe can also be integrated with the liquid pumping pump. In other embodiments, the liquid pumping pipe and the liquid returning pipe can also be physically separated from the liquid pumping pump, so that sensors can be installed in the liquid pumping pipe and the liquid returning pipe to detect the fluid in the liquid pumping pipe and the liquid returning pipe.

[0067] Embodiments of the present application also provide a washing device, which can be a washing machine for washing clothes, for example, or a dishwasher for washing tableware. For the sake of convenience, the following description will be made with the washing device being a washing machine.

[0068] In some embodiments, as shown in FIG. 13, the washing device 1 includes a housing 20, a washing drum 30, and a liquid feeding device 10 as shown in any one of FIGS. 1 to 12. The housing 20 has a containing cavity 21 therein, the washing drum 30 is located in the containing cavity 21, and the liquid feeding device 10 is located in the containing cavity 21. The first liquid outlet 111 communicates with the washing drum 30, so that the liquid feeding device 10 can input detergent into the washing drum 30.

[0069] The liquid feeding device 10 communicates with the water inlet pipe, and the first liquid outlet 111 communicates with the washing drum 30 through a transmission pipe. The first liquid outlet 111 and the transmission pipe are used to inject water or detergent mixed with water into the washing drum 30 to form a main liquid inlet channel of the washing drum 30. Water and / or detergent can enter the washing drum 30 through the main liquid inlet channel, so that the liquid in the washing drum 30 quickly reaches the required liquid level. The liquid can be clean water, detergent, fabric softener, or a mixture of at least two of the above three liquids.

[0070] The Venturi tube body 820 further includes an inlet section and a diffusion section. The inlet section is connected with the premixing water inlet pipe, and the diffusion section is connected with a spray pipe. The spray pipe forms a spray opening with one end of the washing drum 30. When water is supplied to the Venturi tube 800 through the inlet section, the Venturi tube 800 can suck the detergent, water, and air in the liquid distribution cavity 110 through the negative pressure suction port 810, so that the detergent is fully contacted, mixed, and foamed with the water and air. Then the mixture is delivered to the spray opening through the spray pipe, and the detergent is sprayed into the washing drum 30 from the spray opening, so that the detergent can be fully foamed before it contacts the clothes in the washing drum, greatly improving the washing ratio.

[0071] In addition, the washing device further comprises a water inlet valve assembly, the water inlet valve assembly comprising a first valve and a second valve, the first valve controlling the opening and closing of the water inlet pipe, and the second valve controlling the opening and closing of the premix water inlet pipe. In the state that the first valve is open, water can enter the distribution cavity 110 through the water inlet pipe. In the state that the second valve is open, water can enter the inlet section of the Venturi tube 800 through the premix water inlet pipe. By controlling the states of the first valve and the second valve, the water flushing logic during the dispensing of the detergent can be controlled, so that when the detergent needs to be dispensed, the degree of pre-mixing and foaming of the detergent, water and air can be increased, and the residue of the detergent in the distribution cavity and the water inlet pipe can be reduced.

[0072] The embodiments of the present disclosure further provide a liquid dispensing method applied to a washing device for controlling the dispensing of a detergent of the washing device. It should be noted that the execution subject of the liquid dispensing method can be a central controller of the washing device, or a controller of a 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 realized by the data interaction between the central controller and the controller of the liquid dispensing device.

[0073] In some embodiments, the liquid dispensing method is applied to the washing device as shown in FIG. 13, and FIG. 14 is a flowchart of a liquid dispensing method provided by the embodiments of the present disclosure. It can be understood that when the washing program runs to the step of dispensing liquid, the liquid is dispensed, and the liquid dispensing method comprises the following steps.

[0074] Step S101, control the first valve to be open for a first time length, and then control the first valve to be closed.

[0075] By opening the first valve, water can enter the distribution box through the water inlet pipe, and at the same time, water can discharge the air in the water inlet pipe and fill the water inlet pipe with water. The water amount entering the distribution cavity needs to be controlled by controlling the opening time of the first valve in the subsequent control step, and if there is air in the water inlet pipe, the water amount entering the distribution cavity may be less than the target water amount. Discharging the air in the water inlet pipe by opening the first valve can improve the control accuracy of the water amount entering the distribution cavity through the water inlet pipe subsequently. In addition, the distribution cavity can be wetted before the detergent enters the distribution cavity, so as to reduce the residue of the detergent in the distribution cavity. In some embodiments, the first time length is 5 seconds.

[0076] Step S102, control the second valve to be open.

[0077] The second valve is opened to allow water to enter the venturi through the premix water pipe, allowing the water to expel air in the venturi and fill the venturi with water. Subsequent control of the amount of water entering the washing drum from the venturi and control of the amount of detergent drawn into the venturi is achieved by controlling the length of time the second valve is open. If air is present in the venturi, it will result in less water than the target amount entering the washing drum during subsequent control, and will also result in fluctuations in the magnitude of the negative pressure generated in the venturi, resulting in a difference between the target amount of detergent and the amount of detergent drawn into the venturi. The expulsion of air from the premix water pipe and the venturi by opening the second valve improves the accuracy of control of the amount of water entering the washing drum through the water inlet pipe during subsequent control, and improves the accuracy of control of the amount of detergent drawn into the venturi. In some embodiments, the second length of time is 5 seconds.

[0078] Step S103, in a state in which the second length of time has been reached, the liquid pumping pump is controlled to be turned on, and after the liquid pumping pump has been operated for a third length of time, the second valve and the liquid pumping pump are controlled to be turned off.

[0079] In a state in which the second length of time has been reached, it can be considered that the air in the premix water pipe and the venturi has been expelled, and in this state, the liquid pumping pump is controlled to be turned on, so that the liquid pumping pump can pump the detergent in the liquid storage cavity into the liquid distribution cavity, and at the same time, the second valve is still in an open state, the premix water pipe continues to input water into the venturi, and the negative pressure suction port of the venturi forms a negative pressure, so that the detergent, water and air in the liquid distribution cavity can be sucked in through the second liquid outlet.

[0080] In a state in which the liquid pumping pump has been turned on and operated for a third length of time, it can be considered that the target amount of detergent has been input into the washing drum, and in this state, the second valve and the liquid pumping pump are controlled to be turned off, so that the spraying of the detergent into the washing drum is stopped.

[0081] Step S104, the first valve is controlled to be turned on, and after the first valve has been turned on for a fourth length of time, the first valve is controlled to be turned off.

[0082] In some embodiments, the venturi is difficult to completely suck out the detergent in the liquid distribution cavity, and there may be residual detergent in the liquid distribution cavity. By opening the first valve, water can be allowed to enter the liquid distribution cavity through the water inlet pipe, so as to flush the residual detergent in the liquid distribution cavity, and also to flush the residual detergent into the washing drum through the first liquid outlet, thereby more fully utilizing the detergent entering the liquid distribution cavity, and improving the cleaning degree of the liquid distribution cavity. In some embodiments, the fourth length of time can be 15 seconds.

[0083] Step S105, the second valve is controlled to be turned on, and after the second valve has been turned on for a fifth length of time, the second valve is controlled to be turned off.

[0084] In some embodiments, there can be detergent residues in the venturi tube. If the detergent residues remain in the venturi tube, the cleaning degree of the venturi tube can decrease, and even the venturi tube can be blocked. By controlling the second valve to be opened for a fifth time length, clean water can be input into the venturi tube through the premixing water pipe to flush and clean the venturi tube, so as to improve the cleaning degree of the venturi tube and reduce the possibility of the venturi tube being blocked. In some embodiments, the fifth time length can be 30 seconds.

[0085] It should be noted that the execution order of step S104 and step S105 can be interchanged.

[0086] Step S106, control the first valve and the second valve to be opened, and control the first valve and the second valve to be closed after the first valve and the second valve are opened for a sixth time length.

[0087] By simultaneously opening the first valve and the second valve, water can enter the washing drum through the water inlet pipe and the premixing water pipe at the same time, so that the liquid level in the washing drum can reach the preset water level more quickly.

[0088] The above only describes the preferred embodiments of the present disclosure and is not intended to limit the protection scope of the present disclosure.

Claims

1. A liquid dispensing device, characterized in that, The liquid delivery device comprises: a liquid distribution box, an internal liquid distribution cavity is formed in the liquid distribution box, the liquid distribution box is provided with a liquid inlet, a first liquid outlet and a second liquid outlet which are communicated with the liquid distribution cavity, and the liquid distribution box is further provided with a first through hole; a liquid storage member, an internal liquid storage cavity is formed in the liquid storage member, the liquid storage member is located at least partially in the liquid distribution cavity, and the liquid storage member is provided with a second through hole; a liquid pumping device, the liquid pumping device is fixed to the liquid distribution box, a liquid inlet end of the liquid pumping device is communicated with the liquid storage cavity through the first through hole and the second through hole, and a liquid outlet end of the liquid pumping device is communicated with the liquid inlet; a Venturi tube, the Venturi tube is fixedly connected with the liquid distribution box, the Venturi tube comprises a funnel-shaped structure and a Venturi tube main body, one end of the Venturi tube main body is an inlet section, the other end of the Venturi tube main body is a diffusion section, a contraction section is formed in the Venturi tube main body by contraction of a pipe diameter between the inlet section and the diffusion section, a throat is formed at a position of the contraction section close to the diffusion section, a part of the contraction section of the Venturi tube main body close to the throat is connected with the funnel-shaped structure, the funnel-shaped structure has a maximum opening and a negative pressure suction port is formed at the maximum opening, and the negative pressure suction port is communicated with the second liquid outlet.

2. The liquid dispensing device according to claim 1, characterized in that An outer surface of a bottom of the liquid distribution box is provided with a second guide cylinder having a bottom and a side, in a thickness direction of the bottom of the liquid distribution box, the second guide cylinder protrudes from the bottom of the liquid distribution box, and in a direction perpendicular to the thickness direction of the bottom of the liquid distribution box, the second guide cylinder partially exceeds the bottom of the liquid distribution box, a second liquid outlet channel communicated with the liquid distribution cavity is formed in the second guide cylinder, one end of the second liquid outlet channel is communicated with the liquid distribution cavity through the second liquid outlet, and at least a part of the funnel-shaped structure close to the negative pressure suction port is located in a part of the second guide cylinder away from the liquid distribution box in the thickness direction of the bottom of the liquid distribution box.

3. The liquid dispensing device of claim 2, wherein At least one mounting cylinder and at least one positioning column are outwardly provided on an outer surface of the liquid distribution box along an outer periphery of the second guide cylinder, the Venturi tube further comprises a second connecting structure located at flanks of the Venturi tube main 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 cylinder, and the mounting hole can be detachably connected with the mounting cylinder through a connecting member.

4. The liquid dispensing device according to any one of claims 1-3, characterized in that The liquid storage member is a liquid storage box, and the liquid storage box forms a first cavity and a second cavity which are isolated from each other 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 pumping device is communicated with the first cavity and the second cavity through the two first through holes and the two second through holes respectively, and the two liquid outlet ends of the liquid pumping device are communicated with the two liquid inlets respectively; The two liquid inlets comprise a first liquid inlet and a second liquid inlet which are spaced apart; 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 cavity, and the first cavity is used for containing a main detergent.

5. The liquid dispensing device according to any one of claims 1-3, wherein 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 liquid inlet end and the liquid outlet end are also two in number, the two liquid inlet ends are respectively communicated with the first cavity and the second cavity through the two first through holes and the two second through holes, and 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; 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 communicated with the first cavity, and the first cavity is used for containing a main detergent.

6. The liquid dispensing device according to any one of claims 1-5, wherein, The liquid distribution box includes a liquid distribution box body, a liquid distribution box cover and a top cover; The liquid distribution box body and the liquid distribution box cover are fixedly connected, and the liquid distribution box body and the liquid distribution box cover surround to form the liquid distribution cavity; One side of the liquid distribution box cover away from the liquid distribution cavity is provided with a fourth convex wall, the top cover is fixedly connected with the fourth convex wall, and the fourth convex wall and the top cover surround to form a condensation cavity; and / or, one side of the top cover facing the liquid distribution cavity is provided with a fourth convex wall, the liquid distribution box cover is fixedly connected with the fourth convex wall, and the fourth convex wall and the liquid distribution box cover surround to form a condensation cavity; The liquid distribution box cover and the top cover further surround to form a gas pressure balance channel, the gas pressure balance channel is communicated with a washing drum through a gas pressure balance pipe, the gas pressure balance channel is communicated with the condensation cavity, and is used for condensing water in the humid hot air entering the condensation cavity through the gas pressure balance pipe; in a first direction, the gas pressure balance channel is located on a side of the liquid distribution box away from the liquid storage member, and the condensation cavity is located on a side of the liquid distribution box cover close to the gas pressure balance channel; The liquid distribution box cover is provided with a communication port located inside the condensation cavity, and the communication port communicates the condensation cavity and the liquid distribution cavity.

7. The liquid dispensing device of claim 6, wherein The fourth convex wall includes an outer peripheral convex wall and an inner convex wall, the outer peripheral convex wall and the top cover surround to form the condensation cavity, and / or the outer peripheral convex wall and the liquid distribution box cover surround to form the condensation cavity; The inner convex wall extends along a curve in the condensation cavity to form a condensation channel in the condensation cavity; The side of the outer peripheral convex wall and / or the inner convex wall adjacent to the condensation channel is provided with a heat exchange fin, and a plurality of heat exchange fins are arranged at intervals along the extension direction of the condensation channel.

8. The liquid dispensing device of claim 7, wherein The condensation channel has a plurality of condensation channels, the distance between the projection of the plurality of condensation channels on a first plane and the projection of the gas pressure balance channel on the first plane is different, the condensation channel with the smallest distance is a first condensation channel, the liquid distribution box cover further has a water inlet pipe joint, and the water inlet pipe joint is communicated with the first condensation channel, wherein the first plane is a plane with the thickness direction of the liquid distribution box cover as the normal line; The number of communication openings on the part of the distribution box cover located in the first condensation channel is greater than the number of communication openings on the part of the distribution box cover located in the second condensation channel, the second condensation channel being the condensation channel other than the first condensation channel among the plurality of condensation channels; and / or, a plurality of heat exchange fins are arranged at intervals along the extension direction of the second condensation channel, the second condensation channel being the condensation channel other than the first condensation channel among the plurality of condensation channels.

9. The liquid dispensing device according to any one of claims 1-8, characterized in that The liquid delivery device further comprises: a liquid extraction connector detachably connected to the distribution box, the liquid extraction connector comprising a tubular portion, a first end of the tubular portion being located outside the distribution box, a second end of the tubular portion opposite to the first end being inserted into the distribution cavity through the first through hole, the second end of the tubular portion being capable of communicating with the second through hole; a liquid extraction pipe connecting the liquid inlet end of the liquid extraction pump and the first end of the tubular portion; a liquid return pipe connecting the liquid outlet end of the liquid extraction pump and the liquid inlet opening; a suction pipe located in the liquid storage cavity, the suction pipe having opposite third and fourth ends, the third end communicating with the second through hole, the suction pipe extending from the third end to the bottom surface of the liquid storage cavity to the fourth end, the fourth end having a suction opening.

10. A washing apparatus characterized by comprising: The washing device comprises: a housing forming a containing cavity; a washing drum located in the containing cavity; The liquid delivery device according to any one of claims 1-9, the Venturi tube body further comprising an inlet section and a diffusion section, the inlet section being connected to a premix water inlet pipe, the diffusion section being connected to a spray pipe, one end of the spray pipe communicating with the washing drum to form a spray opening; the liquid delivery device being connected to a water inlet pipe, the first liquid outlet being connected to the washing drum through a transmission pipe; and a water inlet valve assembly comprising a first valve and a second valve, the first valve controlling the opening and closing of the water inlet pipe, and the second valve controlling the opening and closing of the premix water inlet pipe.

11. A liquid dispensing method, characterized by, The liquid delivery method is applied to the washing device according to claim 10, and the liquid delivery method comprises: controlling the first valve to open for a first duration and then controlling the first valve to close, so that the water inlet pipe is supplied with water; controlling the second valve to open, so that water enters the Venturi tube through the premix water pipe; when the second valve is open for a second duration, controlling the liquid extraction pump to open, so that the detergent enters the distribution cavity, and after the liquid extraction pump operates for a third duration, controlling the second valve and the liquid extraction pump to close; controlling the first valve to open, and controlling the first valve to close after the first valve is open for a fourth duration; controlling the second valve to open, and controlling the second valve to close after the second valve is open for a fifth duration; and 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 are open for a sixth duration, so that the liquid level in the washing drum reaches a preset water level.

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