CN216895943U - Change-over valve, detergent throw in device and washing machine - Google Patents

Abstract

The utility model provides a change-over valve, a detergent putting device and a washing machine, wherein the change-over valve comprises a first connecting port, a second connecting port, a third connecting port and a fourth connecting port, the first connecting port and the second connecting port are communicated through a second valve port, the third connecting port and the fourth connecting port are communicated through a first valve port, a channel among the first connecting port, the second connecting port, the third connecting port and the fourth connecting port is divided into two independent channels through a diaphragm, and the diaphragm changes the opening and closing states of the first valve port and the second valve port under the action of a regulating device. The switching valve detergent feeding device and the washing machine have ingenious structure, realize the switching of the on-off of two paths of valves by changing the working state of the adjusting device, are mutually independent and easy to control, reduce the parts of the switching valve and reduce the production cost of the switching valve and the automatic detergent feeding device.

Description

Change-over valve, detergent throw in device and washing machine

Technical Field

The utility model relates to the technical field of automatic feeding, in particular to a change-over valve, a detergent feeding device and a washing machine.

Background

At present, washing machines with automatic putting functions are released by various washing machine manufacturers, intelligent addition of detergent can be achieved by the washing machines, manual addition of the detergent by users is avoided, and the washing machines are more convenient and good in use feeling. With the development of technology and the increasing perfection of functions of washing machines, the demand of users on the technology of automatically putting detergent into the washing machine is higher and higher. In the related art, the detergent putting device generally adopts a piston pump, a centrifugal pump, a peristaltic pump, an electromagnetic valve and the like, and the detergent is directly put into the water tank, but the detergent put in the mode is poor in water flow mixing effect, so that the washing performance is affected, and the clothes are damaged due to the direct contact of the detergent and the clothes. In addition, the detergent feeding device is complex in structure and high in cost.

And the washing machine with the automatic putting function can intelligently detect parameters such as water quality, clothes dirt degree and the like, and calculate the accurate detergent putting amount. Some automatic putting-in function washing machines judge the weight of clothes by fuzzy weighing, determine the water consumption corresponding to the amount of the clothes, and then control the working time of a putting-in pump according to the fixed proportion of the concentration of the detergent to put in the detergent. A flow sensor is installed on the automatic feeding device of part of washing machines, and the feeding amount is accumulated through the flow sensor so as to improve the accuracy of the feeding amount.

The control of the current various automatic devices for putting in the detergent on the accuracy of the detergent putting amount is only solved by improving the accuracy of the putting devices, however, the putting devices are only one of the factors influencing the putting amount, and the influence of the environmental factors of equipment use on the detergent putting amount is also great. Such as the ambient temperature, the viscosity of various washing and protecting agents and the influence of water inflow on the concentration of washing and protecting articles in washing liquid, and the like, can influence the final washing and protecting effect of washing equipment.

The device is put in to current detergent, especially involves the automatic device of puting in of multiple detergent input liquid, and the structure is comparatively complicated, needs just can realize the switching work that different detergents were put in through a plurality of control adjusting device to very easily cause the input liquid to remain when using, lead to remaining liquid and input liquid mixture easily when using, reduce the washing effect of clothing.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention provides a switching valve, a detergent dispensing device and a washing machine, so as to achieve the purpose of simplifying the structure and accurately dispensing two detergents when the two detergents are automatically dispensed.

In order to achieve the purpose, the technical scheme of the utility model is realized as follows:

a conversion valve comprises a first connection port, a second connection port, a third connection port and a fourth connection port, wherein the first connection port and the second connection port are communicated through a second valve port, the third connection port and the fourth connection port are communicated through a first valve port, channels among the first connection port, the second connection port, the third connection port and the fourth connection port are separated into two independent channels through a diaphragm, and the diaphragm changes the opening and closing states of the first valve port and the second valve port under the action of a regulating device.

Further, the switching valve comprises a valve housing and a valve body, the valve housing is fixedly connected with the valve body, the second valve port is arranged inside the valve housing, the first valve port is arranged inside the valve body, and the diaphragm is arranged between the first valve port and the second valve port.

Furthermore, the adjusting device is an electromagnetic push rod device and comprises a coil assembly and a magnetic conduction column, the position of the magnetic conduction column is changed by the coil assembly in an on-off state, and the magnetic conduction column can drive the diaphragm to integrally move when moving, so that the opening and closing states of the first valve port and the second valve port are changed.

Furthermore, a rubber valve plug is arranged at the front end of the magnetic conduction column, a return spring is arranged at the rear end of the magnetic conduction column, the rear end of the magnetic conduction column and the return spring are limited inside the coil assembly through a fixing clamp and a plug, the front end of the magnetic conduction column extends out of the coil assembly, the rubber valve plug is arranged between the first valve port and the diaphragm, and the magnetic conduction column can move inside the coil assembly.

Furthermore, the diaphragm is a rubber diaphragm, and the diaphragm performs displacement motion or deformation motion under the action of the return spring and the magnetic conduction column.

Compared with the prior art, the switching valve has the following advantages:

(1) the switching valve provided by the utility model has a smart structure, realizes switching of on and off of two paths of valves by changing the working state of the adjusting device, is mutually independent and easy to control, reduces the parts of the switching valve, and greatly reduces the production cost of the switching valve.

(2) The conversion valve is simple and quick to machine, manufacture and assemble, and the production efficiency of the conversion valve is greatly improved.

(3) According to the conversion valve, the electromagnetic push rod device is arranged to drive the diaphragm to change the position, so that the opening and closing states of the first valve port and the second valve port can be accurately switched, and the purposes of compact structure, accurate control and quick response of the conversion valve are achieved.

(4) According to the change-over valve, the two paths of valves can be switched on and off by arranging the coil assembly, and the two paths of valves are independent from each other, so that the volume of the change-over valve is reduced, the change-over valve can be applied to more scenes, and the production cost is greatly reduced.

The utility model also provides a detergent feeding device, which comprises a fixed cavity, wherein the fixed cavity is provided with the change-over valve, the first connecting port and the third connecting port of the change-over valve are communicated with a cavity for storing detergent feeding liquid through a liquid outlet pipe, the second connecting port and the fourth connecting port of the change-over valve are communicated with a liquid inlet pipeline, and the change-over valve can independently feed the two kinds of detergent feeding liquid into the fixed cavity under the action of the feeding device.

Further, the feeding device comprises two venturi tube structures which are respectively a first venturi tube structure and a second venturi tube structure, the first Venturi tube structure is communicated with the constant volume cavity through a first negative pressure tube, the second Venturi tube structure is communicated with the constant volume cavity through a second negative pressure tube, the first Venturi tube structure is communicated with the water inlet valve through a first water inlet tube opening, the second Venturi tube structure is communicated with the water inlet valve through a second water inlet tube opening, when water is independently fed into the first water inlet pipe orifice, the constant volume cavity starts to suck the detergent in the liquid cavity to put liquid under the action of the first Venturi tube structure, when the second water inlet pipe orifice starts to feed water, the detergent feeding liquid in the constant volume cavity feeds the mixed liquid of the detergent feeding liquid and water into the washing barrel body or the feeding cavity under the action of the second Venturi tube structure through the second water drainage pipe orifice.

Furthermore, the second drain pipe mouth communicates with the discharge pipe way, the discharge pipe way can put in the mixed liquid of detergent input liquid and water that flows through the second drain pipe mouth intake pipe on the discharge pipe way, the one end and the atmosphere of intake pipe are linked together.

Furthermore, the discharge pipeline is a third venturi tube structure, and the air inlet pipe is connected to a negative pressure port of the third venturi tube structure.

Compared with the prior art, the detergent feeding device has the following advantages:

(1) according to the detergent feeding device, the two venturi tube structures are arranged to form the double-venturi negative pressure combined four-way change-over valve automatic feeding assembly, the detergent feeding liquid is sucked and fed in through the double-negative pressure mode, the structure is reasonable, the control is accurate, the control structure for automatically feeding the detergent is greatly simplified, and the production cost is reduced.

(2) According to the detergent feeding device, the four-way change-over valve is arranged on the double-negative-pressure Venturi tube structure, the outlet communicated with the detergent inlet of the four-way change-over valve is opened, the outlet communicated with the softening agent liquid inlet pipe orifice of the four-way change-over valve is blocked, or the outlet communicated with the detergent inlet of the four-way change-over valve is blocked, and the outlet communicated with the softening agent liquid inlet pipe orifice of the four-way change-over valve is opened, so that only one detergent feeding liquid can be fed each time, the channels for feeding the detergent feeding liquids are independent from each other, the phenomenon that the residual detergent feeding liquids in the feeding channels are mixed with other detergent feeding liquids, and the feeding amount of the detergent feeding liquids is distorted

A third object of the present invention is to provide a washing machine, wherein the switching valve or the detergent dispenser is disposed on the washing machine.

The washing machine has the same advantages as the switching valve and the detergent feeding device compared with the prior art, and the advantages are not described again.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

FIG. 1 is a schematic cross-sectional view of a changeover valve according to an embodiment of the present invention;

FIG. 2 is a schematic view of a switching valve according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a detergent dispensing device according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a second structure of a detergent dispensing device according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a third structure of a detergent dispensing device according to an embodiment of the present invention;

description of reference numerals:

1. a first venturi structure; 2. a first negative pressure tube; 3. a liquid suction one-way valve; 4. a holding cavity is fixed; 5. a first liquid inlet check valve; 6. a first liquid outlet pipe; 7. a liquid discharge check valve; 8. a second negative pressure tube; 9. a second water inlet pipe orifice; 10. a second venturi structure; 11. a second drain pipe opening; 12. a first drain outlet; 13. A first water inlet pipe orifice; 14. a second pipette; 15. a first pipette; 16. a changeover valve; 1601. a first connection port; 1602. a second connection port; 1603. a third connection port; 1604. a fourth connection port; 1605. fixing the card; 1606. a plug; 1607. a return spring; 1608. a coil assembly; 1609. a magnetically conductive post; 1610. a first valve port; 1611. a rubber valve plug; 1612. a valve body; 1613. a valve housing; 1614. a second valve port; 1615. a diaphragm; 1616. a wiring terminal; 17. a discharge line; 18. an air inlet pipe; 19. a connecting hose; 20. a second liquid inlet one-way valve; 21. a second liquid outlet pipe; 22. a chamber; 2201. a first reservoir chamber; 2202. a second reservoir chamber.

Detailed Description

In order to make the technical means, objectives and functions of the present invention easy to understand, embodiments of the present invention will be described in detail with reference to the specific drawings.

It should be noted that all terms used in the present invention for directional and positional indication, such as: the terms "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", "top", "lower", "lateral", "longitudinal", "center", and the like are used only for explaining the relative positional relationship, connection, and the like between the respective members in a certain state (as shown in the drawings), and are only for convenience of describing the present invention, but do not require that the present invention must be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. In addition, the descriptions related to "first", "second", etc. in the present invention are 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.

In the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; may be a mechanical connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Example 1

As shown in fig. 1 and 2, the present invention discloses a switching valve, which includes a first connection port 1601, a second connection port 1602, a third connection port 1603, and a fourth connection port 1604, wherein the first connection port 1601 and the second connection port 1602 are communicated with each other through a second port 1614, the third connection port 1603 and the fourth connection port 1604 are communicated with each other through the first port 1610, a channel between the first connection port 1601, the second connection port 1602, the third connection port 1603, and the fourth connection port 1604 is divided into two independent channels by a diaphragm 1615, and the diaphragm 1615 changes the open/closed states of the first port 1610 and the second port 1614 by a regulating device.

The utility model discloses a conversion valve, which comprises four connecting ports, wherein each two connecting ports form a communication channel, the two communication channels are separated into two independent channels through a diaphragm 1615, for example, a first communication channel is formed among a first connecting port 1601, a second connecting port 1602 and the diaphragm 1615, a second valve port 1614 is arranged on the first communication channel, a second communication channel is formed among a third connecting port 1603, a fourth connecting port 1604 and the diaphragm 1615, a first valve port 1610 is arranged on the first communication channel, and the diaphragm 1615 can close the first valve port 1610 or the second valve port 1614 under the action of a regulating device, so that on-off regulation of two channels of valves can be realized through one regulating device.

The switching valve structure disclosed by the utility model is ingenious in structure, realizes the switching of the on-off of two paths of valves by changing the working state of the adjusting device, is mutually independent and easy to control, reduces the parts of the switching valve, and greatly reduces the production cost of the switching valve.

As a preferred example of the present invention, the switching valve includes a valve housing 1613 and a valve body 1612, the valve housing 1613 is fixedly connected to the valve body 1612, the second valve port 1614 is disposed inside the valve housing 1613, the first valve port 1610 is disposed inside the valve body 1612, and the diaphragm 1615 is disposed between the first valve port 1610 and the second valve port 1614.

During assembly, the actuator, diaphragm 1615 and valve body 1612 are assembled and the assembled structure is then fixedly attached to valve housing 1613, where the valve housing 1613 and valve body 1612 are sealed. The arrangement facilitates the processing, manufacturing and assembling of the change-over valve, and greatly improves the production efficiency.

As a preferred example of the present invention, the adjusting device is an electromagnetic push rod device, and includes a coil assembly 1608 and a magnetic conducting pillar 1609, the coil assembly 1608 changes the position of the magnetic conducting pillar 1609 in an on-off state, and the magnetic conducting pillar 1609 can drive the diaphragm 1615 to move integrally when moving, so as to change the open/close states of the first valve port 1610 and the second valve port 1614.

According to the change-over valve, the electromagnetic push rod device is arranged to drive the position of the diaphragm 1615 to change, so that the opening and closing states of the first valve port 1610 and the second valve port 1614 are accurately switched, and the purposes of compact structure, accurate control and quick response of the change-over valve are achieved.

As a preferred example of the present invention, a rubber plug 1611 is disposed at the front end of the flux guiding column 1609, a return spring 1607 is disposed at the rear end of the flux guiding column 1609, the rear end of the flux guiding column 1609 and the return spring 1607 are limited inside the coil assembly 1608 by a fixing clip 1605 and a plug 1606, the front end of the flux guiding column 1609 extends out of the coil assembly 1608, the rubber plug 1611 is disposed between the first valve port 1610 and the diaphragm 1615, and the flux guiding column 1609 can move inside the coil assembly 1608.

When the coil assembly 1608 is not electrified, the magnetic conducting column 1609 and the rubber valve plug 1611 are pushed to the left position in fig. 1 under the action of the return spring 1607, the rubber valve plug 1611 pushes the diaphragm 1615 to move to abut against or deform to abut against the second valve port 1614, the second valve port 1614 is blocked, the first valve port 1610 is opened, so that the third connection port 1603 and the fourth connection port 1604 are communicated and opened, and the first connection port 1601 and the second connection port 1602 are communicated and closed; when the coil assembly 1608 is energized, the flux guide pillar 1609 and the rubber valve plug 1611 move to the right (as shown in fig. 1) against the force of the return spring 1607 under the action of electromagnetic force, the rubber valve plug 1611 pushes the diaphragm 1615 to move to abut against or deform to abut against the first valve port 1610, at this time, the second valve port 1614 is opened, the first valve port 1610 is blocked, in this state, the communication between the third connection port 1603 and the fourth connection port 1604 is closed, and the communication between the first connection port 1601 and the second connection port 1602 is opened, so that the flow path switching of the switching valve is realized.

According to the change-over valve, the two paths of valves can be switched on and off by arranging the coil assembly, and the two paths of valves are independent from each other, so that the volume of the change-over valve is reduced, the change-over valve can be applied to more scenes, and the production cost is greatly reduced.

As a preferred example of the present invention, the membrane 1615 is a rubber membrane. Through the arranged rubber diaphragm, the diaphragm 1615 has certain flexible deformation capacity, the sealing performance of the diaphragm 1615 when the first valve port 1610 is connected with the second valve port 1614 in an on-off mode is improved, and confusion of flowing media in different flow channels is avoided.

As a preferred example of the present invention, a connection terminal 1616 is provided on the coil assembly 1608, and the connection terminal 1616 is used for connecting an external power source.

The four-way change-over valve structure disclosed by the utility model has the advantages that different feeding pipelines are adopted when two detergents are fed with liquid, the two feeding pipelines are switched by the electromagnet and the magnetic conduction column, the problem of residual mixing of the detergents in the liquid caused by the adoption of the change-over valve with two inlets and one outlet is avoided, the structural device is simplified, the occupied space is not increased, and the production cost is reduced.

The embodiment also discloses a detergent putting device, and the detergent putting device is provided with the switching valve.

Example 2

As shown in fig. 1 to 3, the present invention discloses a detergent feeding device, which includes a fixed cavity 4, wherein the fixed cavity 4 is provided with a change-over valve structure as described in embodiment 1, a first connection port 1601 and a third connection port 1603 of the change-over valve 16 are communicated with a chamber 22 for storing detergent feeding liquid through a liquid outlet pipe, a second connection port 1602 and a fourth connection port 1604 of the change-over valve 16 are communicated with a liquid inlet pipe, and the change-over valve 16 feeds two kinds of detergent feeding liquid into the fixed cavity 4 separately under the action of the feeding device.

As a preferred example of the present invention, the dispensing device includes two venturi tube structures, which are a first venturi tube structure 1 and a second venturi tube structure 10, respectively, negative pressure tubes of the two venturi tube structures are communicated with the constant volume cavity 4, and a check valve and/or a ball float valve are disposed in the two negative pressure tubes and the liquid outlet tube, so that the detergent dispensing liquid flows to the constant volume cavity 4 or the detergent dispensing liquid in the constant volume cavity 4 is dispensed into the washing tub by changing the water inlet state of the two venturi tubes.

Specifically, as an example of the present invention, the two venturi tube structures are a first venturi tube structure 1 and a second venturi tube structure 10, the first venturi tube structure 1 is communicated with the fixed cavity 4 through a first negative pressure pipe 2, the second venturi tube structure 10 is communicated with the fixed cavity 4 through a second negative pressure pipe 8, the first venturi tube structure 1 is communicated with a water inlet valve through a first water inlet pipe orifice 13, the second venturi tube structure 10 is communicated with the water inlet valve through a second water inlet pipe orifice 9, the water inlet valve can feed water to the second water inlet pipe orifice 9 and the first water inlet pipe orifice 13 separately and/or simultaneously, when the first water inlet pipe orifice 13 feeds water separately, the fixed cavity 4 starts to suck the detergent in the liquid cavity 22 under the action of the first venturi tube structure 1, and when the second water inlet pipe orifice 9 starts to feed water, the detergent in the fixed cavity 4 starts to feed the liquid through the second drainage pipe orifice 10 The nozzle 11 puts the mixed liquid of the detergent putting liquid and water into the washing barrel body or the putting cavity.

As an example of the present invention, the two independent channels in the switching valve 16 are used as independent flow channels, and are respectively connected to two liquid suction pipes and two liquid outlet pipes, the liquid suction pipes extend into the chamber 22 to suck the washing liquid, and the liquid outlet pipes extend into the fixed cavity 4 to discharge the washing liquid into the fixed cavity 4. The cavity 22 comprises at least two cavities, namely a first liquid storage cavity 2201 and a second liquid storage cavity 2202, the first liquid storage cavity 2201 and the second liquid storage cavity 2202 are used for storing conventional detergent putting liquid such as detergent and softener, the two liquid suction pipes extend into the first liquid storage cavity 2201 and the second liquid storage cavity 2202 respectively, the feeding device is communicated with the detergent putting liquid by switching on and off the coil assembly 1608 on the conversion valve 16, and then the detergent putting liquid is put into the constant volume cavity 4 under the action of the feeding device.

Specifically, the first connection port 1601 of the change-over valve 16 is communicated with the second liquid outlet pipe 21, the second connection port 1602 is communicated with the second liquid suction pipe 14, the third connection port 1603 of the change-over valve 16 is communicated with the first liquid outlet pipe 6, the fourth connection port 1604 is communicated with the first liquid suction pipe 15, the first liquid outlet pipe 6 and the second liquid outlet pipe 21 extend into the predetermined cavity 4, the first liquid suction pipe 15 is communicated with the second liquid storage cavity 2202, and the second liquid suction pipe 14 is communicated with the first liquid storage cavity 2201.

As a preferred example of the present invention, a first water discharge pipe orifice 12 is disposed at the end of the first venturi structure 1, and the first water discharge pipe orifice 12 is used for discharging water of the first venturi structure 1, and after water enters through a first water inlet pipe orifice 13, the water flows to the washing tub body or the throwing cavity or other structures through the first water discharge pipe orifice 12 of the first venturi structure 1.

The working principle of the structure is as follows:

first water inlet pipe mouth 13 intakes, get into first venturi structure 1, first negative pressure pipe 2 produces the negative pressure, imbibition check valve 3 in the first negative pressure pipe 2 is opened, flowing back check valve 7 in the second negative pressure pipe 8 closes, when change-over valve 16 switches to first drain pipe 6 and first suction pipe 15 for the route, first feed liquor check valve 5 in the first drain pipe 6 is opened, begin to absorb the detergent from second stock solution chamber 2202 and put in liquid, get into constant volume chamber 4. After the fixed cavity 4 is filled with the detergent feeding liquid, or after the fixed cavity 4 absorbs the quantitative detergent feeding liquid, the first liquid inlet one-way valve 5 in the first liquid outlet pipe 6 is closed, and at the moment, the first water inlet pipe opening 13 continues to feed water, only water is fed, and the detergent feeding liquid does not enter the fixed cavity 4 any more;

close the intaking of first water inlet pipe mouth 13, open second water inlet pipe mouth 9 and intake, second venturi structure 10 begins work, and flowing back check valve 7 in the second negative pressure pipe 8 is opened, and first feed liquor check valve 5 in the first drain pipe 6 is closed, decide detergent in the appearance chamber 4 and put in liquid and be inhaled second venturi structure 10, then intake along with second water inlet pipe mouth 9, detergent is put in liquid and is entered into and put in the appearance chamber and or inside the washtub.

When the switch valve 16 is switched to the passage of the second liquid outlet pipe 21 and the second liquid suction pipe 14, the working state and the working process are similar to those when the switch valve 16 is switched to the passage of the first liquid outlet pipe 6 and the first liquid suction pipe 15, and the description thereof is omitted.

According to the utility model, the two Venturi tube structures are arranged to form the double-Venturi negative pressure combined four-way change-over valve automatic feeding assembly, the absorption and feeding of the detergent feeding liquid are completed in a double negative pressure mode, the structure is reasonable, the control is accurate, the control structure for automatically feeding the detergent is greatly simplified, and the production cost is reduced.

The structure and principle of the throwing device with the double negative pressure venturi tube structure are specifically described in other schemes by the applicant, and are not described in detail herein.

Different from the past, lie in having adopted the change-over valve, simultaneously, the feed liquor pipe of being connected with constant volume chamber 4 is divided into two the tunnel, is first drain pipe 6 and second drain pipe 21 respectively set up first feed liquor check valve 5 in the first drain pipe 6 set up second feed liquor check valve 20 in the second drain pipe 21, as detergent feed liquor check valve and softener feed liquor check valve, through first drain pipe 6 and second drain pipe 21 respectively with two export connectors of change-over valve 16 link to each other, and the other two exports of change-over valve 16 are connected with first stock solution chamber 2201 (detergent stock solution chamber) and second stock solution chamber 2202 (softener stock solution chamber) respectively, realize like this that detergent and softener separately put in, avoid the mixed discharge of residual liquid in the pipeline.

According to the utility model, the outlet communicated with the detergent inlet of the conversion valve is opened, and the outlet communicated with the softening agent liquid inlet pipe orifice of the conversion valve is plugged, or the outlet communicated with the detergent inlet of the conversion valve is plugged, and the outlet communicated with the softening agent liquid inlet pipe orifice of the conversion valve is opened, so that only one detergent putting liquid can be put in each time, and the channels for putting each detergent putting liquid are mutually independent, and the phenomenon that the surplus detergent putting liquid and other detergent putting liquids are mixed in the putting channels and the putting quantity of the detergent putting liquid is distorted is avoided.

Example 3

As shown in fig. 4, the present invention discloses a detergent dispensing device, wherein the second drain pipe orifice 11 is communicated with the discharge pipeline 17, the discharge pipeline 17 can dispense a mixed liquid of detergent dispensing liquid and water flowing out through the second drain pipe orifice 11, an air inlet pipe 18 is provided on the discharge pipeline 17, one end of the air inlet pipe 18 is communicated with the atmosphere, and the other structures are the same as those of embodiment 2.

Second venturi structure 10's second drain pipe mouth 11 department, through coupling hose 19, connect the import of discharge pipe way 17, discharge pipe way 17's export is used for puting in the mixed liquid of detergent input liquid and water that flows through second drain pipe mouth 11, set up intake pipe 18 between discharge pipe way 17's import and the export, intake pipe 18's one end is linked together with the atmosphere, can be through intake pipe 18 to discharge pipe way 17 in the air admission when having liquid to flow in discharge pipe way 17.

The working principle of the structure is that the liquid mixed by water and detergent or softener at the outlet end of the second Venturi tube structure 10 flows to the inlet of the discharge pipeline 17 through the connecting hose 19, and the air inlet pipe 18 arranged on the discharge pipeline 17 is connected to the atmosphere, so that the water mixed with the detergent and air flows out from the outlet end of the discharge pipeline 17, the aeration condition is generated, namely foam is generated, the detergent is fully dissolved in the water, and the washing effect is benefited.

As an example of the present invention, the inlet pipe 18 includes a bent section that is disposed in the discharge pipe 17 and bent in a flow direction of the liquid in the discharge pipe 17. When this setting makes discharge line 17 have liquid to flow, can produce certain negative pressure in intake pipe 18 to make the outer air of intake pipe 18 produce the bubble in intake pipe 18 entering discharge line 17, and can not cause great influence to the pressure in the intake pipe 18 front end structure, guarantee the reliability of other part work.

Example 4

As shown in fig. 5, the present invention discloses a detergent dispensing device, wherein the discharge pipeline 17 is a third venturi tube structure, the air inlet pipe 18 is connected to a negative pressure port of the third venturi tube structure, and other structures are the same as those in embodiment 3.

This arrangement further ensures the reliability of the intake air in the discharge line 17.

Example 5

The utility model discloses a washing machine, which comprises a detergent feeding device as described in any one of embodiments 1-4.

Preferably, the detergent feeding device can be an independent external feeding device or a feeding device integrated on the washing machine, and the feeding device, a main water inlet valve and a water inlet box on the washing machine form a highly integrated feeding device.

Preferably, the detergent feeding device shares a main water inlet electromagnetic valve of the washing machine, namely a multi-head water inlet valve, and is used for controlling feeding of different washing and protecting articles.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (10)

1. A switching valve is characterized by comprising a first connection port (1601), a second connection port (1602), a third connection port (1603) and a fourth connection port (1604), wherein the first connection port (1601) and the second connection port (1602) are communicated through a second valve port (1614), the third connection port (1603) and the fourth connection port (1604) are communicated through the first valve port (1610), a channel among the first connection port (1601), the second connection port (1602), the third connection port (1603) and the fourth connection port (1604) is divided into two independent channels through a diaphragm (1615), and the diaphragm (1615) changes the opening and closing states of the first valve port (1610) and the second valve port (1614) under the action of a regulating device.

2. Switching valve as in claim 1, characterized in that it comprises a valve housing (1613) and a valve body (1612), the valve housing (1613) being fixedly connected to the valve body (1612), the second valve port (1614) being arranged inside the valve housing (1613), the first valve port (1610) being arranged inside the valve body (1612), the diaphragm (1615) being arranged between the first valve port (1610) and the second valve port (1614).

3. The switching valve as claimed in claim 1 or 2, wherein the switching device is an electromagnetic push rod device, and comprises a coil assembly (1608) and a magnetic conductive column (1609), the coil assembly (1608) changes the position of the magnetic conductive column (1609) in the on-off state, and the magnetic conductive column (1609) can drive the diaphragm (1615) to move integrally when moving, so as to change the on-off states of the first valve port (1610) and the second valve port (1614).

4. The changeover valve of claim 3, wherein a rubber plug (1611) is disposed at a front end of the flux-conducting post (1609), a return spring (1607) is disposed at a rear end of the flux-conducting post (1609), the rear end of the flux-conducting post (1609) and the return spring (1607) are constrained inside the coil assembly (1608) by a fixing clip (1605) and a plug (1606), the front end of the flux-conducting post (1609) protrudes out of the coil assembly (1608), the rubber plug (1611) is disposed between the first valve port (1610) and the diaphragm (1615), and the flux-conducting post (1609) is movable inside the coil assembly (1608).

5. Switching valve as in claim 4, characterized in that the diaphragm (1615) is a rubber diaphragm, the diaphragm (1615) being subjected to a displacement or deformation movement by the return spring (1607) and the magnetically conductive column (1609).

6. A detergent feeding device is characterized by comprising a fixed cavity (4), wherein a change-over valve according to any one of claims 1-5 is arranged on the fixed cavity (4), a first connecting port (1601) and a third connecting port (1603) of the change-over valve (16) are communicated with a cavity (22) for storing detergent feeding liquid through a liquid outlet pipe, a second connecting port (1602) and a fourth connecting port (1604) of the change-over valve (16) are communicated with the fixed cavity (4) through liquid inlet pipes, and the change-over valve (16) feeds two kinds of detergent feeding liquid into the fixed cavity (4) independently under the action of the feeding device.

7. The detergent dispensing device according to claim 6, wherein the dispensing device comprises two Venturi tube structures, the two Venturi tube structures are respectively a first Venturi tube structure (1) and a second Venturi tube structure (10), the first Venturi tube structure (1) is communicated with the fixed cavity (4) through a first negative pressure tube (2), the second Venturi tube structure (10) is communicated with the fixed cavity (4) through a second negative pressure tube (8), the first Venturi tube structure (1) is communicated with a water inlet valve through a first water inlet pipe orifice (13), the second Venturi tube structure (10) is communicated with the water inlet valve through a second water inlet pipe orifice (9), and when the first water inlet pipe orifice (13) alone enters water, the fixed cavity (4) starts to suck detergent in liquid in the liquid cavity (22) under the action of the first Venturi tube structure (1), when the second water inlet pipe orifice (9) begins to feed water, detergent feeding liquid in the fixed cavity (4) is fed into the washing barrel body or the feeding cavity through the second water drainage pipe orifice (11) under the action of the second Venturi tube structure (10) to feed mixed liquid of the detergent feeding liquid and water into the washing barrel body.

8. A detergent dispensing device as claimed in claim 7, characterized in that the second outlet (11) is connected to a discharge pipe (17), the discharge pipe (17) being capable of dispensing a mixture of detergent dispensing liquid and water flowing out through the second outlet (11), an inlet pipe (18) being provided in the discharge pipe (17), one end of the inlet pipe (18) being connected to the atmosphere.

9. Detergent dispensing device according to claim 8, wherein said discharge line (17) is a third venturi tube structure, and wherein an inlet pipe (18) is connected to a negative pressure port of said third venturi tube structure.

10. A washing machine, characterized in that a switching valve according to any one of claims 1 to 5 or a detergent dispensing device according to any one of claims 6 to 9 is provided on the washing machine.

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