CN111685692A

CN111685692A - Dispensing device and dish washing machine

Info

Publication number: CN111685692A
Application number: CN201911117496.XA
Authority: CN
Inventors: 黄隆重; 黄宁杰; 其他发明人请求不公开姓名
Original assignee: Zhejiang Sanhua Intelligent Controls Co Ltd
Current assignee: Zhejiang Sanhua Intelligent Controls Co Ltd
Priority date: 2019-06-25
Filing date: 2019-11-15
Publication date: 2020-09-22

Abstract

The utility model discloses a distributor includes water intaking valve, venturi and first cavity portion, second cavity portion, the water intaking valve contains first water intaking valve and second water intaking valve at least, the venturi has inlet portion, diffuser portion and sets up in the negative pressure mouth of diffuser portion, first water intaking valve with the inlet portion intercommunication, the diffuser portion with second cavity portion intercommunication, the negative pressure mouth with the second water intaking valve first cavity portion communicates respectively, just first cavity portion with second water intaking valve intercommunication, first cavity portion with second cavity portion intercommunication just first cavity portion with be provided with the control valve between the second cavity portion, distributor can carry out washing and the process of drawing liquid, reduces the influence of detergent viscosity to distributor.

Description

Dispensing device and dish washing machine

Technical Field

The present application relates to the field of dispensing and dishwashers, and more particularly to dispensing of detergents, and more particularly to a dispensing device and a dishwasher incorporating the same.

Background

The related art dispensing device is disadvantageous to the quantitative dispensing of the dispensing device because the dispensing device has a high temperature during operation, which causes the detergent to dry up on the tube wall of the dispensing device, and the tube is easily clogged due to long-term use, so that improvement is needed.

Disclosure of Invention

According to an aspect of the present application, a dispensing device is provided, the dispensing device includes a water inlet valve, a venturi, a first cavity, and a second cavity, the water inlet valve includes at least a first water inlet valve and a second water inlet valve, the venturi has an inlet portion, a diffuser portion, and a negative pressure port disposed on the diffuser portion, the first water inlet valve communicates with the inlet portion, the diffuser portion communicates with the second cavity, the negative pressure port communicates with the second water inlet valve and the negative pressure port communicates with the first cavity, the first cavity communicates with the second water inlet valve, the first cavity communicates with the second cavity and a one-way control valve is disposed between the first cavity and the second cavity, and the control valve can control communication between the first cavity and the second cavity.

According to another aspect of the present application, there is provided a dishwasher comprising the dispensing device described above.

The advantageous effects of the present application will be described in detail in the following detailed description.

Drawings

Fig. 1 is a schematic structural diagram of a dispensing device according to an embodiment of the present application.

Fig. 2 is a schematic view of the dispensing device of fig. 1 according to an embodiment of the present invention.

Fig. 3 is a schematic view of the dispensing device of fig. 1 for performing a fluid pumping operation according to an embodiment of the present invention.

Fig. 4 is a schematic view of a dispensing device according to another embodiment of the present application.

Fig. 5 is a schematic view of a dispensing device of fig. 4 for performing a fluid extraction operation according to another embodiment of the present application.

Fig. 6 is a schematic structural diagram of a dispensing device according to yet another embodiment of the present application.

Fig. 7 is a schematic view of the dispensing device of fig. 6 according to yet another embodiment of the present application.

Fig. 8 is a schematic view of a dispensing device of fig. 6 for performing a fluid-pumping operation according to another embodiment of the present application.

Fig. 9 is a schematic view of a dispensing device according to another embodiment of the present application.

Reference numerals:

a dispensing device 100; a water inlet valve 10; a first inlet valve 11; a second inlet valve 12; a venturi tube 20; an inlet portion 21; a diffusion portion 22; a negative pressure port 23; a three-way pipe 30; a first tube section 31; a second tube segment 32; a third tube section 33; a third chamber portion 40; a first cavity portion 50; a second cavity portion 60; a detergent control valve 13; a control valve 14; a flow meter 70; a float valve 71; a dispensing device 200; a first cavity portion 51; the second first cavity portion 52; a first detergent control valve 131; a second detergent control valve 132; a dispensing device 300; a dispensing device 400;

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature. Exemplary embodiments of the present application will be described in detail below with reference to the accompanying drawings. The features of the following examples and embodiments can be supplemented or combined with each other without conflict.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

Exemplary embodiments of the present application will be described in detail below with reference to the accompanying drawings. The features of the following examples and embodiments may be combined with each other without conflict.

In the related art, especially in the dishwasher, a dispenser having a dual chamber structure of a detergent chamber and a brightener chamber is used, and the detergent and the brightener are dispensed by sequential actions, wherein the brightener can be automatically dispensed. However, the detergent chamber can be added with detergent in block, powder or liquid form, the detergent needs to be added additionally every time washing is carried out, the inventor thinks that the operation is troublesome, the washing effect can not be realized if the detergent is forgotten to be added, and the detergent chamber can be automatically distributed and can be more intelligent. The inventor finds that the main reason why the automatic distribution of the detergent is difficult at present is that the detergent generally has certain viscosity, and the internal temperature of the dish washing machine can reach 60-70 ℃ usually when the dish washing machine works, so that the detergent is easy to dry in the dish washing machine. The inventor finds that if gravity is used as power, the constant volume space is used for metering, or a floating ball is arranged in the constant volume space, and when the constant volume space is filled with the detergent, the floating ball switch is used for controlling the outflow of the detergent; at this moment, the electromagnetic valve is opened again, so that the detergent in the constant volume cavity flows out from the liquid outlet, but the distribution realized based on the gravity action is that the detergent has a certain viscosity, especially when the temperature is low, the larger the viscosity is, the float switch of the constant volume space is easy to lose efficacy, the detergent cannot be thrown or thrown in a small amount due to the incapability of opening or closing, and the detergent with medium and high viscosity also has outflow difficulty when the liquid outlet is too small, so that the detergent cannot be thrown or thrown in a small amount. The inventor finds that if the pump is used as power, the pump cavity can be used for metering the automatic distribution system, the motor can be used for driving the piston, the volume of the pump cavity is increased, detergent is extracted, and when the volume of the pump cavity is reduced, the problem of viscosity can be solved by pushing out the detergent, but the problem that the pump fails due to high-temperature drying of the detergent cannot be solved, and moving parts in the pump, particularly rubber parts in the pump are prone to wear and fatigue, so that failure such as action noise and detergent leakage occurs. Therefore, the dispensing structure needs to be improved.

Based on the above problems, the inventors of the present application provide a dispensing device that can improve the above problems. As will be described in detail below.

The distribution device adopts a negative pressure type distribution structure, and the improved Venturi tube is utilized to pump the detergent in the first cavity part into the washing barrel, so that on one hand, quantitative feeding can be basically realized, on the other hand, the improvement and the Venturi tube and the pipeline can be used in a matched manner to perform washing work, and the washing channel can be used for basically avoiding the detergent from being dried on the inner wall. It will be readily appreciated that the dispensing device of the present application may be used in dishwashers, washing machines, and the like, without limitation thereto.

Fig. 1 is a schematic structural diagram of a dispensing device 100 according to an embodiment of the present application. The distribution device 100 comprises a water inlet valve 10, a venturi pipe 20 and a three-way pipe 30, wherein the water inlet valve 10 comprises two, namely a first water inlet valve 11 and a second water inlet valve 12, the venturi pipe 20 comprises an inlet part 21, a diffusion part 22 and a negative pressure port 23 arranged on the diffusion part, and the three-way pipe 30 comprises a first pipe section 31, a second pipe section 32 and a third pipe section 33, wherein the first water inlet valve 11 is communicated with the inlet part 21 of the venturi pipe 20. It should be noted that the venturi tube is a pipe structure which is designed to be contracted and then gradually enlarged according to the venturi effect, and the venturi effect is characterized in that when the restricted flow passes through the reduced flow section (the cross section at the joint of the inlet portion 21 and the diffusion portion 22 is reduced as shown in fig. 1), the flow velocity of the fluid is increased, and the flow velocity is inversely proportional to the flow section. While an increase in flow rate is accompanied by a decrease in fluid pressure, as is known from bernoulli's law. In general, this effect is referred to as the creation of a low pressure in the vicinity of a fluid flowing at a high speed, thereby creating an adsorption effect, i.e., a negative pressure at the negative pressure port 23.

The diffuser portion 22 of the venturi tube 20 of the present invention is provided with the negative pressure port 23, the negative pressure port 23 is communicated with the first pipe segment 31 of the three-way pipe 30, the communication may be direct communication, for example, no other structural member is provided between the negative pressure port 23 and the first pipe segment 31 of the three-way pipe 30, the communication may also be indirect communication, for example, another structural member such as a control valve is provided between the negative pressure port 23 and the first pipe segment 31 of the three-way pipe 30, in other words, the communication may be direct communication or indirect communication, and it should be noted that the communication is explained herein. The second inlet valve 12 communicates with a second pipe section 32 of the tee 30. It should be added that the three-way pipe 30 is mainly used for communicating pipes, and the structure thereof is not limited, and may be an oblique three-way pipe or a T-shaped pipe, and of course, the three-way pipe 30 may also be replaced by a structural member or a pipe connection that can play the same or similar role, and is not limited here.

The dispensing device 100 further comprises a third chamber portion 40, a first chamber portion 50 and a second chamber portion 60, the first chamber portion 50 being operable to store detergent, brightener and the like, a washing operation being operable within the second chamber portion 60, the third chamber portion 40 being operable as a transfer structure. Wherein the third chamber portion 40 is in communication with the second tube segment 32 of the tee 30 and the second chamber portion 60 is in communication with the diffuser portion 22 of the venturi 20. In addition, the third chamber portion 40 communicates with the first chamber portion 50, and the third chamber portion 40 communicates with the second chamber portion 60. Optionally, a flow meter 70 is disposed between the third chamber portion 40 and the second pipe section 32 of the three-way pipe 30, and when the liquid in the third chamber portion 40 flows to the three-way pipe 30, the flow meter 70 can control the liquid flow in the third chamber portion 40, so as to realize linear flow of the liquid flow. Alternatively, the third cavity 40 may be a separate cavity structure, or may be formed by only a cavity at a section of a pipe, and is not limited herein.

Optionally, a detergent control valve 13 is disposed between the third cavity portion 40 and the first cavity portion 50, detergent is stored in the first cavity portion 50 during actual use, and the detergent control valve 13 can control the detergent to enter the third cavity portion 40. The third cavity portion 40 is communicated with the second cavity portion 60, optionally, the third cavity portion 40 is communicated with the second cavity portion 60 through a pipeline, a control valve 14 is disposed between the third cavity portion 40 and the second cavity portion 60, the control valve 14 may be a one-way valve, which can control the liquid in the third cavity portion 40 to flow into the second cavity portion 60 and prevent the liquid in the second cavity portion 60 from flowing back into the third cavity portion 40, and of course, other similar structural members may be disposed between the third cavity portion 40 and the second cavity portion 60 as long as it can realize the one-way flow of the liquid from the third cavity portion 40 to the second cavity portion 60.

In practice, the dispensing device 100 can be divided into a flushing process and a pumping process. Fig. 2 is a schematic view of the internal fluid flow path of the dispensing device 100 of fig. 1 during a flush procedure. Fig. 3 is a schematic view of the internal fluid flow path of the dispensing device 100 of fig. 1 during a fluid withdrawal procedure.

As shown in fig. 2, when the dispensing device 100 is performing a flushing operation, the first feed valve 11 and the detergent control valve 13 are in a closed state, and the second feed valve 12, the control valve 14 and the flow meter 70 are in an open state. The liquid water can enter the third pipe section 33 of the tee pipe 30 through the second water inlet valve 12, and then is divided into two paths, one path flows along the first pipe section 31, enters the diffusion part 22 through the negative pressure port 23 of the venturi tube 20, and then flows into the second chamber part 60. The other path flows along the third pipe section 33 and flows into the washing tub 60 via the third chamber portion 40. The above process allows the flow meter 70 and the third chamber portion 40 to be filled with liquid water, wherein the flow meter 70 allows the detergent to be dosed linearly and controllably, as will be described in detail below.

As shown in fig. 3, when the dispensing device 100 performs a pumping operation, the first inlet valve 11 and the detergent control valve 13 are in an open state, and the second inlet valve 12 and the control valve 14 are in a closed state. When the flow meter 70 is turned on, the liquid water can enter the inlet 21 of the venturi tube 20 through the first inlet valve 11, and then enter the diffuser 22 of the venturi tube 20 to flow into the second chamber portion 60. In the above process, due to the special structure of the venturi tube 20, it creates a negative pressure at the negative pressure port 23, and when the control valve is opened, the detergent is drawn from the first chamber portion 50 into the third chamber portion 40. At the same time, the same volume of liquid in the third chamber portion 40 flows through the flow meter 70 and the same volume of detergent enters the third chamber portion 40. In other words, a volume of detergent enters the third chamber portion 40 while a volume of liquid equal to the volume of detergent flows through the flow meter 70. In the process, the dosage of the detergent is linear and controllable.

In practical applications, if the amount of the detergent to be dispensed into the second chamber portion 60 is less than or equal to the volume of the third chamber portion 40, the dispensing device 100 may perform a first rinsing process, then perform a second pumping process, and repeatedly perform the first rinsing process to dispense the detergent in the third rinsing process. If the amount of detergent to be dispensed into the second chamber portion 60 is greater than the volume of the third chamber portion 40, the dispensing device 100 may perform a first rinsing process, then perform a second pumping process, and then repeat the first rinsing process and the second pumping process until the desired dispensing amount is reached. It should be noted that the flush function included in the dispensing device 100 of the present embodiment can flush the line with a low viscosity to avoid drying out of the detergent remaining in the line, so that the detergent can be fully functional while avoiding the real possibility of the detergent clogging the line.

As shown in fig. 4, a schematic view of an internal fluid flow path of a dispensing device 200 according to yet another embodiment of the present application during a flush procedure. Fig. 5 is a schematic view of the internal fluid flow path of the dispensing device 200 of fig. 4 during a fluid withdrawal procedure. The dispensing device 200 is, for the most part, of the same construction as the dispensing device 100, with the difference that the dispensing device 200 has two first cavity parts 50, i.e. the dispensing device 200 comprises a first cavity part 51 and a first cavity part 52 which are independent of each other. In other embodiments, the dispensing device has a plurality of first cavity portions 50, wherein the plurality is at least two, in other words, the plurality includes two or more, and the plurality is provided according to specific situations. The second cavity portions 50 are not directly communicated with each other, and the first cavity portions 50 can contain different liquid agents, such as detergent, brightener, disinfectant and the like, so as to realize different washing functions. Of course, a plurality of the second cavity portions 50 may also contain the same liquid agent, and the arrangement is not limited herein.

As shown in fig. 4 and 5, the dispensing device 200 includes the first cavity 51 and the second cavity 52, the first cavity 51 and the second cavity 52 are not directly connected to each other, and the first cavity 51 and the second cavity 52 are respectively connected to the third cavity 40. The first chamber 51 can be controlled by a first detergent control valve 131, and can contain detergent therein, and the first detergent control valve 131 controls the detergent feeding. The second chamber portion 52 can be controlled by a second detergent control valve 132, and can contain brightener and the like in the chamber, and the second detergent control valve 132 controls the adding of the brightener. The dispensing device 200 can be divided into a flushing process and a pumping process, and the operations of the flushing process and the pumping process are substantially the same as those of the dispensing device 100, which are not described herein.

Fig. 6 shows a dispensing device 300 according to still another embodiment of the present application, the piping design of the dispensing device 300 is substantially the same as that of the dispensing device 100 and the dispensing device 200, and the main difference is that a ball float 71 is arranged between the third cavity 40 and the tee 30, and the ball float 71 is matched with the piping design to realize the quantitative administration of the detergent.

In practice, the dispensing device 300 can be divided into a flushing process and a pumping process. Fig. 7 is a schematic view of the internal fluid flow path of the dispensing device 300 of fig. 6 during a flush procedure. Fig. 8 is a schematic view of the internal fluid flow path of the dispensing device 300 of fig. 6 during a fluid withdrawal procedure.

As shown in fig. 7, when the dispensing device 300 in fig. 6 performs a flushing operation, the first water inlet valve 11 and the detergent control valve 13 are in a closed state, the second water inlet valve 12 is opened, and liquid water can enter the second pipe section 32 of the tee pipe 30 through the second water inlet valve 12, and then is divided into two paths, wherein one path flows along the first pipe section 31 and enters the diffuser 22 through the negative pressure port 23 of the venturi tube 20, and then flows into the second chamber portion 60. The other way flows along the third pipe section 33 and opens the ball float valve 71 to flow into the washing tub 60 through the third cavity part 40, in the process, flushing can be generated on the pipeline, and the detergent residue is prevented from drying out and causing failure.

It should be noted that in this embodiment, the outlet of the flow path from the third chamber portion 40 to the washing tub 60 is lower than the inlet, the second water inlet valve 12 is closed, and due to the siphon action, the liquid in the third chamber portion 40 flows into the second chamber portion 60 through the pipeline, so that the third chamber portion is emptied, and the next liquid extraction precision is improved.

As shown in FIG. 8, when the dispensing device 300 of FIG. 6 performs a liquid pumping operation, the first inlet valve 11 and the detergent control valve 13 are opened, and the second inlet valve 12 and the control valve 14 are closed. Liquid water can enter the inlet 21 of the venturi 20 through the first inlet valve 11, and then enter the diffuser 22 of the venturi 20 to flow into the second chamber portion 60. In the above process, due to the special structure of the venturi tube 20, it forms a negative pressure at the negative pressure port 23, and of course, there is a negative pressure also in the pipe where the negative pressure port 23 communicates, i.e. there is a negative pressure in both the three-way pipe 30 and the third chamber portion 40, and when the control valve is opened at this time, there is a negative pressure also in the first chamber portion 50, whereby the detergent can be pumped from the first chamber portion 50 to the third chamber portion 40. When the third chamber 40 is filled with detergent, the ball float 71 blocks the connection passage between the third chamber 40 and the tee 30, so as to quantitatively draw out the detergent.

In practical applications, if the amount of the detergent to be dispensed into the second chamber portion 60 is equal to the volume of the third chamber portion 40, the dispensing device 300 may perform a first rinsing process, then perform a second pumping process, and perform a third rinsing process repeatedly to dispense the detergent. If the amount of the detergent to be dispensed into the second chamber portion 60 is N times the volume of the third chamber portion 40, the dispensing device 100 may perform a first rinsing process and an emptying process, then perform a second pumping process, and then repeat the first rinsing and emptying process and the second pumping process N-1 times. It should be noted that the dispensing device 300 of the present embodiment includes a flushing function that can flush the pipeline with water to prevent the detergent remaining in the pipeline from drying out, so that the detergent can fully exert its efficacy while preventing the detergent from blocking the pipeline.

Fig. 9 is a schematic diagram of a dispensing device 400 according to another embodiment of the present application. The dispensing device 400 is, for the most part, of the same construction as the dispensing device 300, with the difference that the dispensing device 400 has two first cavity parts 50, i.e. the dispensing device 400 comprises a first cavity part 51 and a second cavity part 52 which are independent of each other. The first chamber portion 51 and the second chamber portion 52 are not directly communicated with each other, and the first chamber portion 51 and the second chamber portion 52 are respectively communicated with the third chamber portion 40. The first chamber 51 can be controlled by a first detergent control valve 131, and can contain detergent therein, and the first detergent control valve 131 controls the detergent feeding. The second first chamber portion 52 can be controlled by a second detergent control valve 132, and can contain brightener and the like in the chamber, and the second detergent control valve 132 controls the adding of the brightener. And will not be described in detail herein. In other embodiments, the dispensing device has a plurality of first cavity portions 50, wherein the plurality is at least two, in other words, the plurality includes two or more, and the plurality is provided according to specific situations. The second cavity portions 50 are not directly communicated with each other, and the first cavity portions 50 can contain different liquid agents, such as detergent, brightener, disinfectant and the like, so as to realize different washing functions. Of course, a plurality of the second cavity portions 50 may also contain the same liquid agent, and the arrangement is not limited herein.

Although the present application has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the application, and all changes, substitutions and alterations that fall within the spirit and scope of the application are to be understood as being covered by the following claims.

Claims

1. A distribution device is characterized by comprising a water inlet valve, a venturi pipe, a first cavity portion and a second cavity portion, wherein the water inlet valve at least comprises a first water inlet valve and a second water inlet valve, the venturi pipe is provided with an inlet portion, a diffusion portion and a negative pressure port arranged on the diffusion portion, the first water inlet valve is communicated with the inlet portion, the diffusion portion is communicated with the second cavity portion, the negative pressure port is communicated with the second water inlet valve, the negative pressure port is communicated with the first cavity portion, the first cavity portion is communicated with the second water inlet valve, a control valve is arranged between the first cavity portion and the second cavity portion, and the communication between the first cavity portion and the second cavity portion can be controlled through the control valve.

2. The dispensing apparatus as claimed in claim 1 wherein a flow meter or a float valve is disposed between the first body portion and the negative pressure port, the flow meter is disposed between the second fill valve and the second body portion, or the float valve is disposed between the second fill valve and the second body portion.

3. A dispensing device according to claim 1 or 2, wherein a control valve is provided between the flow meter and the first chamber portion or between the float valve and the first chamber portion.

4. A dispensing apparatus according to any of claims 1 to 3, wherein there are a plurality of said first chamber portions, each of said first chamber portions being provided with a respective said control valve.

5. The dispensing device according to claim 4, wherein a third chamber portion is provided between said flow meter and said first chamber portion, said flow meter and said first chamber portion being communicable via said third chamber portion, said flow meter and said second chamber portion being communicable via said third chamber portion, and said first chamber portion and said second chamber portion being communicable via said third chamber portion.

6. Dispensing device according to claim 4, in which the float valve is arranged in the third chamber part, the float valve being movable in the third chamber part.

7. The dispensing device of claim 6 wherein when said third chamber portion is filled with liquid, said ball float valve moves to a junction of said third chamber portion and said negative pressure port and blocks liquid in said third chamber portion from flowing into said negative pressure port.

8. The dispensing apparatus according to any one of claims 1 to 7 further comprising a tee having a first section, a second section and a third section, wherein the negative pressure port is in direct or indirect communication with the first section, the first chamber portion is in direct or indirect communication with the second section, and the second inlet valve is in direct or indirect communication with the third section.

9. The dispensing apparatus according to claim 8, wherein the dispensing apparatus is capable of performing a flushing operation in which the first inlet valve and the control valve are closed and the second inlet valve, the control valve and the flow meter are opened, and liquid water is introduced and divided into two paths by the second inlet valve, one path of the liquid water flows along the first pipe section and enters the diffuser portion through the negative pressure port of the venturi tube, and then flows into the second chamber portion, and the other path of the liquid water flows along the third pipe section and flows into the tub through the third chamber portion, and the first inlet valve and the detergent control valve are opened and the second inlet valve and the control valve are closed, and the flow meter is opened and liquid water is introduced into the inlet portion of the venturi tube through the first inlet valve, and then enters the diffuser portion of the venturi tube and flows into the second chamber portion.

10. A dishwasher, characterized in that it comprises a dispensing device as claimed in any one of claims 1 to 9.