Patent Description:
Additives such as a washing agent, a softening agent and a disinfectant used in the washing process of a traditional washing machine are separated from the washing machine, an additive feeding device is not arranged on the washing machine, the additives cannot be automatically fed, and the structure cannot achieve the full-automatic washing control process of the washing machine. Along with the improvement of automation of the washing machines, most of the washing machines are arranged in a manner that an additive box for containing a detergent or/and a softening agent communicates with a water inlet pipeline, the detergent or/and the softening agent in the additive box is flushed into a water containing drum through fed water, but according to the structure, the detergent or/and the softening agent needs to be put into the additive box firstly every time washing is carried out; and a full-automatic washing control process is not realized as well.

A large number of patents related to automatic additive feeding devices exist at present, for example, a washing machine detergent adding device disclosed in the previous Chinese patent is characterized in that a containing cavity matched with a bottle is formed in a washing machine box body, a conical through hole is formed in the bottom of the containing cavity, and a vertical fixing piece is fixed to the through hole; the vertical fixing piece fixes a washing liquid guide pipe, the bottle body is matched with the containing cavity, a conical guide-in pipe is arranged on a bottle opening, and a ventilation opening is formed in the bottom of the bottle body. The structure cannot control the adding amount of the detergent and is easy to damage to waste the detergent.

Another Chinese patent application document discloses a detergent supply device of a washing machine with a detergent box having a siphon unit, the detergent is injected into the detergent box, washing water is injected into the detergent box to dilute the detergent in the box, and then the diluted detergent is discharged into a washing cylinder from the siphon unit. The problem that washed clothes are damaged due to the fact that a concentrated detergent directly enters a washing cylinder is solved, but automatic additive accurate control of the detergent cannot be achieved.

However, after an existing automatic additive feeding device is used, blockage is caused by the fact that the additive remains in an internal pipeline of the device, and next use of the additive feeding device is affected. Meanwhile, an existing additive automatic feeding device generally has the problems of a complex structure, excessive control structures and the like, so that the cost of the automatic feeding device is too high, and popularization cannot be realized.

An additive feeding device comprising the features of the preamble portion of claim <NUM> in known from <CIT>. The suction structure of the this known feeding device for supplying additive is entirely separate from a main water supply line. Fed water supply is either passed completely through the main water supply line or completely through the suction structure for the additive. Additive is fed into a liquid storage cavity though a first opening. The main water supply is connected to the liquid storage cavity through the same first opening. Water from the main water supply line flushes the liquid storage cavity to thereby mix with the additive and leave the liquid storage cavity though a further second opening.

The object of the present invention is to improve the mixing process of water and additive.

This technical problem is solved by the additive feeding device comprising the features of claim <NUM> and the washing machine of claim <NUM>.

The liquid storage cavity connected with the water supply pipeline is formed in the water box, so that an additive pumped into the water supply pipeline is mixed with fed water in the water supply pipeline and then is fed, premixing of the additive is achieved, and the density of the liquid flowing to the opposite-flushing mechanism is reduced. Therefore, the effect that the liquid flowing out of the water supply pipeline can serve as one path of water stream to form an opposite-flushing water stream at the opposite-flushing structure is achieved.

In addition, through the arrangement, the first opening, connected with the second water supply pipe section, of the liquid storage cavity has the dual functions of allowing the additive pumped into the water supply pipeline to flow in, and allowing mixed liquid of the additive and fed water in the liquid storage cavity to flow out at the same time.

Optionally, according to the suction structure, the pipeline connecting mode may be reasonably designed, so that only two one-way check valves are installed, and the switching of the flow direction of a liquid in an internal pipeline can be achieved through starting and stopping of the power unit, and the switching use effect of sucking the additive into the water supply pipeline and flushing the suction structure is achieved.

Meanwhile, the present disclosure is simple in structure, outstanding in effect and suitable for being popularized and used.

The disclosure is specifically explained in combination with the attached drawings. In the darwings:.

Description of main elements: <NUM>-water supply pipeline, <NUM>-liquid storage box, <NUM>-liquid storage cavity, <NUM>-first one-way check valve, <NUM>-second one-way check valve, <NUM>-pump, <NUM>-connecting pipeline, <NUM>-liquid pumping pipeline, <NUM>, <NUM>-opposite-flushing mechanism, <NUM>-first water supply pipeline, <NUM>-second water supply pipeline, <NUM>-first water outlet branch, <NUM>-second water outlet branch, <NUM>-third water outlet branch, <NUM>-water inlet valve, <NUM>, <NUM>-tee joint, <NUM>-notch, <NUM>-inclined plane, <NUM>-first opening, <NUM>-second opening, <NUM>-protruding part, <NUM>-water inlet, <NUM>-second water inlet, <NUM>-first water supply pipe section, <NUM>-second water supply pipe section, <NUM>-first water inlet branch, <NUM>-second water inlet branch, <NUM>-boss, <NUM>-first rising convex part, <NUM>-second rising convex part, <NUM>-pump inlet, <NUM>-pump outlet, <NUM>-water box, <NUM>-upper cover and <NUM>-water path.

The embodiment of the disclosure discloses an automatic additive feeding device which is applied to an existing washing machine and used for feeding an additive into a water containing drum of the washing machine. The additive in the embodiment of the disclosure can be any one or combination of a detergent, a softener, a flavoring agent, a bleaching agent, a disinfectant and other existing liquid additives for treating clothes.

<FIG> show an automatic additive feeding device, which includes a water supply pipeline <NUM> used for the flowing of fed water of a washing machine and enabling the fed water to flow into a water containing drum of the washing machine; a liquid storage box <NUM> in which an additive is accommodated; and a suction structure which includes a power unit for providing suction power, the suction power can be provided through the power unit, the additive in the liquid storage box <NUM> is sucked to the water supply pipeline <NUM>, and the fed water in the water supply pipeline is mixed with the pumped additive and then the additive is flushed out; and meanwhile, part of the fed water stream flows into the water supply pipeline through the suction structure so as to wash the suction structure.

The suction structure reasonably designs the pipeline connection mode, so that only two one-way check valves are mounted, and the internal pipeline connection mode can be adjusted through the mutual matching of the start and stop of the power unit and the start and stop of the fed water; the use switching effects of pumping the additive into the water supply pipeline <NUM>, feeding the additive and flushing the pumping structure are achieved.

The automatic feeding device includes at least two liquid storage boxes <NUM>, different types of additives can be stored in the liquid storage boxes <NUM> respectively, and the liquid storage boxes <NUM> are connected with the water supply pipeline <NUM> through the suction structure in a selective or combined manner by a control device, so that the corresponding additive in the corresponding liquid storage box <NUM> flows into the water supply pipeline <NUM>.

<FIG> discloses an additive feeding device which includes a water supply pipeline <NUM>, a liquid storage box <NUM>, and a suction structure. The water inlet end of the water supply pipeline <NUM> communicates with a water inlet structure of a washing machine so that the water stream guided into the washing machine can be guided into the feeding device; the liquid storage box accommodates an additive used when the clothes are processed; and the suction structure includes a connecting pipeline which is at least partially connected with the water supply pipeline in parallel, a pump for providing suction power is arranged on the connecting pipeline, the liquid storage box is connected with the connecting pipeline, and a control device for controlling the flow direction and/or on-off of liquid in the pipeline is arranged on the water supply pipeline and/or the connecting pipeline. The additive in the liquid storage box <NUM> is pumped into the water supply pipeline <NUM>, or water is fed into the water supply pipeline <NUM>, so that the sucked additive is mixed with the fed water stream and then is fed, and part of the fed water stream is used for washing the power unit through the connecting pipeline.

The suction structure includes a pump <NUM> providing suction power, the pump <NUM> is connected to the connecting pipeline <NUM> in series, the end, opposite to the inlet end of the pump <NUM>, of the connecting pipeline is a water inlet end, the end, opposite to the outlet end of the pump <NUM>, of the connecting pipeline <NUM> is an outlet end, and the water inlet end and the water outlet end of the connecting pipeline <NUM> both communicate with the water supply pipeline <NUM>. The water inlet end of the connecting pipeline is located on the upstream of the water supply pipeline compared with the water outlet end of the connecting pipeline.

The liquid storage box <NUM> is connected with the connecting pipeline <NUM> through the liquid pumping pipeline <NUM>, and the connecting part of the liquid pumping pipeline <NUM> and the connecting pipeline <NUM> is located between the pump inlet end and the water inlet end of the connecting pipeline <NUM>, so that the liquid storage box <NUM> is connected with the connecting pipeline <NUM> at the upstream of the pump inlet end through the liquid pumping pipeline <NUM>.

A control device is arranged on the water supply pipeline <NUM> and/or the connecting pipeline <NUM> to perform corresponding on-off switching on the water supply pipeline <NUM> and/or the connecting pipeline <NUM>, so that the inlet end of the pump communicates with the liquid storage box <NUM> through a liquid pumping pipeline <NUM>, and the additive is pumped into the water supply pipeline; or water is fed into the water supply pipeline, part of the fed water mixes the pumped additive through the water supply pipeline and flushes the additive to the water outlet end of the water supply pipeline, and the other part of the fed water flushes the pump through the connecting pipeline and then is combined to flow to the water outlet end of the water supply pipeline, so that the purpose of flushing and cleaning the pump is achieved.

The pump <NUM> can be any pump structure capable of providing suction power in the prior art, such as an electromagnetic pump, a suction pump, a power pump and the like.

The water supply pipeline is provided with a water inlet valve for controlling on-off of supplied water, and the water inlet valve is arranged on the upstream of the communicating position of the suction structure and the water supply pipeline; preferably, the water inlet valve is arranged on the water supply pipeline at the upstream of the connecting part of the inlet end of the connecting pipeline; and preferably, the water inlet valve <NUM> is arranged at the water inlet end of the water supply pipeline <NUM>. Therefore, controllable opening and closing control of the fed water stream of the water supply pipeline <NUM> is achieved, on and off of the fed water stream of the water supply pipeline <NUM> are matched with opening and closing of the pump <NUM>, and the purpose of improving the detergent feeding efficiency is achieved.

When the pump works, the water inlet valve is closed, so that when the additive in the liquid storage box is pumped into the water supply pipeline, water is stopped from entering the water supply pipeline, the pump is prevented from pumping fed water flowing into the upstream of the water supply pipeline from the connecting pipeline, and the situation that the additive cannot be pumped out is prevented; and meanwhile, when the water inlet valve is opened, the pump stops working, so that part of the fed water stream flows through the connecting pipeline to flush the pump which stops working and is located at a communicating pipe section, and the phenomenon that additive remains in the pump and the connecting pipeline is avoided.

In order to achieve on-off switching of the liquid pumping pipeline <NUM> and the connecting pipeline <NUM>, the control device can be arranged in any mode in the prior art, for example, control valves for controlling on-off of the pipelines are arranged on the water supply pipeline <NUM> and the connecting pipeline <NUM> respectively, and the inlet end of the pump <NUM> alternatively communicates with the water supply pipeline <NUM> and the liquid pumping pipeline <NUM> through a reversing valve.

In order to reduce the cost of the feeding device, the control device on the water supply pipeline <NUM> and/or the connecting pipeline <NUM> is arranged as follows:
The water supply pipeline <NUM> is provided with a first one-way check valve <NUM>, and the first one-way check valve <NUM> is located between the inlet end of the connecting pipeline <NUM> and the outlet end of the connecting pipeline <NUM>; and the liquid pumping pipeline <NUM> is provided with a second one-way check valve <NUM> for controlling liquid in the pipeline to only flow from the liquid storage box <NUM> to the inlet end of the pump <NUM>.

Therefore, when the pump <NUM> works, a water inlet valve of the water supply pipeline <NUM> is disconnected to stop water feeding, a suction acting force is formed at the inlet end of the pump <NUM>, and an additive in the liquid storage box <NUM> is sucked in and fed into the water supply pipeline <NUM> through the liquid pumping pipeline <NUM> and cannot flow to the water inlet end of the connecting pipeline under the action of the first one-way check valve <NUM> arranged on the water supply pipeline. The condition that the additive sucked into the water supply pipeline <NUM> flows back to the connecting pipeline <NUM> is avoided. Meanwhile, when the pump <NUM> does not work, a water inlet valve of the water supply pipeline <NUM> is opened to start water feeding, the pump <NUM> forms a communicating pipeline through which water flows freely, part of the fed water directly flows into the water supply pipeline <NUM>, and part of the fed water flows along the pump and the connecting pipeline <NUM> and then converges to the downstream of the water supply pipeline <NUM>, so that the effect of flushing the pump <NUM> is achieved; and in the process, the liquid pumping pipeline <NUM> is disconnected under the action of the second one-way check valve <NUM>, so that the water stream is prevented from flowing into the liquid storage box <NUM>.

In order to ensure that the additive is pumped into the water supply pipeline <NUM> and does not flow back, the following arrangement is made: the water supply pipeline <NUM> is provided with a liquid storage cavity <NUM> for temporarily storing the additive pumped into the water supply pipeline <NUM> by a pump <NUM>. The liquid storage cavity <NUM> is connected into the water supply pipeline <NUM> in series and located between the water inlet end of the connecting pipeline and the water outlet end of the connecting pipeline. Preferably, the outlet end of the pump <NUM> directly communicates with the liquid storage cavity <NUM> or communicates with the liquid storage cavity <NUM> through the water outlet end of the connecting pipeline <NUM>.

Further preferably, the outlet end of the pump <NUM> communicates with the upper part of the liquid storage cavity <NUM>, so that the additive pumped into the liquid storage cavity <NUM> flows in from the upper part of the cavity to avoid backflow; the water supply pipeline <NUM> penetrates through the bottom of the side wall of the liquid storage cavity <NUM> and communicates with the liquid storage cavity <NUM>, so that water stream provided by the water supply pipeline <NUM> can flush the bottom of the liquid storage cavity <NUM>, and the additive pumped into the cavity can be completely flushed to the water outlet end of the water supply pipeline <NUM> by the fed water stream of the water supply pipeline <NUM>. Further preferably, in order to guarantee the operation stability of the whole device, the liquid storage cavity <NUM> is arranged to be a sealed cavity.

The specific feeding working process of the additive feeding device is as follows:
Firstly, the water inlet valve of the water supply pipeline <NUM> is closed, the pump <NUM> is started, at the moment, a suction force is formed at the inlet end of the pump <NUM>, and the additive in the liquid storage box <NUM> is pumped to the pump <NUM> along the liquid pumping pipeline <NUM> and then flows into the liquid storage cavity <NUM> formed in the water supply pipeline <NUM> through the connecting pipeline <NUM>; in the process, the water supply pipeline <NUM> cannot make the additive pumped into the water supply pipeline <NUM> flow to the water inlet end of the connecting pipeline <NUM> under the action of the first one-way check valve <NUM>, so that the condition that the additive circularly flows between the connecting pipeline and the water supply pipeline is prevented.

Then, the water inlet valve <NUM> of the water supply pipeline <NUM> is opened, the pump <NUM> is closed, at the moment, the pump <NUM> forms a communicating pipeline through which water flows freely, part of fed water in the water supply pipeline <NUM> flows into the liquid storage cavity <NUM>, and the additive in the liquid storage cavity <NUM> is directly flushed into the downstream of the water supply pipeline <NUM>; and the other part of the fed water stream flows along the pump <NUM> and the connecting pipeline <NUM> and then converges to the downstream of the water supply pipeline <NUM>, in the process, the fed water stream passing through the connecting pipeline <NUM> flushes the pump <NUM>, and under the action of the second one-way check valve <NUM>, the fed water stream passing through the connecting pipeline <NUM> cannot flow into the liquid storage box <NUM> through the liquid pumping pipeline <NUM>.

By means of the above mode, the purposes of sucking and feeding the additive and flushing and cleaning the pump <NUM> of the sucking device are achieved, and then the effect of automatically feeding the additive is achieved on the premise that the production cost is reduced. Meanwhile, in the operation process of the additive feeding device, the technical solution that flushing is conducted in time after the additive is fed is adopted, it is avoided that the additive remains in the feeding device, and particularly the situation that corrosion damage is caused due to the fact that the additive remains in a power part of the additive feeding device is prevented from occurring.

<FIG> the additive feeding device to include a first water supply pipeline <NUM> and a second water supply pipeline <NUM> which are connected in parallel, the first water supply pipeline <NUM> is provided with said suction structure for sucking additive in the liquid storage box <NUM> into the pipeline, and the suction structure can suck the additive in the liquid storage box <NUM> into the water supply pipeline <NUM>.

A suction structure can be connected to the second water supply pipeline <NUM>, and the suction structure can be independently arranged and can also be shared with the first water supply pipeline <NUM>, so that the function of automatically feeding the additive by using the second water supply pipeline <NUM> is realized.

The first water supply pipeline <NUM> and the second water supply pipeline <NUM> communicate with any one of the multiple water outlet branches in a reversing mode through the opposite-flushing mechanism <NUM>, and the water outlet branches are connected with different water inlet structures of the water containing drums of the washing machine respectively so that the fed water of the washing machine can be conveyed to a water inlet device of any water containing drum. Therefore, the purpose of supplying water to different water inlet structures is achieved. The water inlet device of the water containing drum can be any existing structure, for example, a spraying structure for spraying water into the water containing drum, a main washing water inlet cavity allowing detergent and/or washing powder to flow into the water containing drum, an auxiliary washing water inlet cavity allowing softener and other auxiliary additives to flow into the water containing drum and the like.

In order to achieve the effects, the following arrangement is made: the water outlet ends of the first water supply pipeline <NUM> and the second water supply pipeline <NUM> are arranged on the same side of the opposite-flushing mechanism <NUM> in a staggered mode by an inclined angle, and the water inlet ends of the first water outlet branch <NUM>, the second water outlet branch <NUM> and the third water outlet branch <NUM> are located on the other side of the opposite-flushing mechanism <NUM>. By arranging the water supply pipelines and the water outlet branches which are connected through the opposite-flushing mechanism on the additive feeding device, the water stream form of the automatic feeding device is enriched, and the using effect that the automatic feeding device provides corresponding fed water streams in different washing procedures of the washing machine is achieved.

The water outlet end of the first water supply pipeline <NUM> is coaxially and oppositely spaced from the water inlet end of the first water outlet branch <NUM>, and when the first water supply pipeline <NUM> supplies water independently, the fed water stream is sprayed out from the water outlet end of the first water supply pipeline <NUM> and flows into the water inlet end of the first water outlet branch <NUM>. The water outlet end of the second water supply pipeline <NUM> is coaxially and oppositely spaced from the water inlet end of the second water outlet branch <NUM>, and when the second water supply pipeline <NUM> supplies water independently, the fed water stream is sprayed out from the water outlet end of the second water supply pipeline <NUM> and flows into the water inlet end of the second water outlet branch <NUM>. The water inlet end of the third water outlet branch <NUM> is located between the water inlet end of the first water outlet branch <NUM> and the water inlet end of the second water outlet branch <NUM>. When the first water supply pipeline <NUM> and the second water supply pipeline <NUM> supply water at the same time, two water streams interfere with each other and are combined into the same supplied water stream, and the supplied water stream flows into the water inlet end of the third water outlet branch <NUM>. Preferably, in order to ensure that the converged water stream accurately flows into the third water outlet branch, the axis of the water inlet end of the third water outlet branch is arranged along the center line of the water inlet end of the first water outlet branch and the water inlet end of the second water outlet branch.

Preferably, a washing machine is characterized in that the additive feeding device is installed, and the water supply pipeline <NUM> of the additive feeding device is connected with a water containing drum of the washing machine so that the additive pumped out of the liquid storage box <NUM> by the suction structure can be conveyed into the water containing drum.

The washing machine may be provided with a spraying device for spraying water into the water containing drum, the softener feeding opening for feeding the softener into the water containing drum and the washing feeding opening for feeding the washing agent or washing powder into the water containing drum. The water outlet end of the first water outlet branch <NUM> of the additive feeding device communicates with the washing feeding opening, the water outlet end of the second water outlet branch <NUM> communicates with the spraying device, and the water outlet end of the third water outlet branch <NUM> communicates with the softener feeding opening.

As shown in <FIG>, the additive feeding device which includes a water box <NUM>; a liquid storage box <NUM> for accommodating an additive is mounted in the water box <NUM>; a water path <NUM> is integrated on the water box <NUM>. Preferably, the top of the water path <NUM> is buckled with an upper cover <NUM>, and the water path <NUM> is integrated in the upper cover <NUM> of the water box <NUM>. More preferably, the upper cover <NUM> of the water box is composed of a first part and a second part which are mutually and correspondingly buckled up and down, opposite surfaces of the first part and the second part are respectively provided with grooves which are oppositely open and correspondingly overlapped, so that a water path <NUM> is defined by the corresponding grooves after the first part and the second part are mutually buckled.

The water path <NUM> of the additive feeding device includes a water supply pipeline <NUM> for introducing fed water of the feeding device and a connecting pipeline <NUM> which is at least partially connected with the water supply pipeline <NUM> in parallel; a pump <NUM> which is connected into the connecting pipeline <NUM> in series is mounted on the water box <NUM>; the liquid storage box <NUM> is connected with the connecting pipeline <NUM> through a liquid pumping pipeline <NUM> penetrating through the water box <NUM>, and the water supply pipeline <NUM> and/or the connecting pipeline <NUM> are/is provided with a control device for controlling the flowing direction and/or the on-off of liquid in the pipeline. The additive in the liquid storage box <NUM> is pumped into the water supply pipeline <NUM> by utilizing the suction force of the pump <NUM>, or water is supplied into the water supply pipeline <NUM> to feed the pumped additive and wash the pump <NUM>.

A liquid storage cavity <NUM> which forms an independent cavity in a surrounding mode is installed on the water box <NUM>, and the liquid storage cavity <NUM> is connected into the water supply pipeline <NUM> in series. Preferably, the liquid storage cavity <NUM> is formed in the outer side of the water box <NUM>. A first opening <NUM> is formed in the top of the liquid storage cavity <NUM>, the first opening <NUM> is connected with the water supply pipeline <NUM>, and at the same time the first opening <NUM> is used for pumping the additive in the water supply pipeline <NUM> to flow into the liquid storage cavity <NUM> and enabling a mixture of the additive and water in the liquid storage cavity <NUM> to flow out to the water supply pipeline <NUM>. Further preferably, the liquid storage cavity <NUM> is further provided with another second opening <NUM> which communicates with the water supply pipeline <NUM>, so that the fed water flowing into the water supply pipeline <NUM> flows into the liquid storage cavity <NUM>, and the fed water is premixed with a temporarily stored additive in the liquid storage cavity <NUM> to form a mixture of the additive and the water.

The liquid storage cavity <NUM> connected with the water supply pipeline <NUM> in series is formed in the water box, so that an additive pumped into the water supply pipeline <NUM> is mixed with fed water in the water supply pipeline <NUM> and then fed, the additive is premixed, and the density of liquid flowing to the opposite-flushing mechanism is reduced; therefore, the effect that the liquid flowing out of the water supply pipeline can serve as one path of water stream to form an opposite-flushing water stream at the opposite-flushing structure is achieved.

The water supply pipeline <NUM> includes a first water supply pipe section <NUM> and a second water supply pipe section <NUM>, the first water supply pipe section <NUM> is used for connecting the liquid storage cavity <NUM> with a water inlet <NUM> of the feeding device, and the second water supply pipe section <NUM> is used for connecting the liquid storage cavity <NUM> with the opposite-flushing mechanism <NUM>. The additive and water mixture in the liquid storage cavity <NUM> flows to the opposite-flushing mechanism <NUM> along with the fed water of the water supply pipeline <NUM> to be correspondingly fed.

One end of a connecting pipeline <NUM> is connected with a water inlet <NUM> of the feeding device, the other end of the connecting pipeline <NUM> is connected with a pump inlet <NUM> of the pump <NUM>, and a pump outlet <NUM> of the pump <NUM> is connected with the middle part of the second water supply pipe section <NUM> of the water supply pipeline <NUM>; and the middle part of the connecting pipeline <NUM> is connected with the liquid storage box <NUM> through the liquid pumping pipeline <NUM>. By means of the arrangement, the opening, connected with the second water supply pipe section <NUM>, of the liquid storage cavity <NUM> has the dual functions of allowing the additive pumped into the water supply pipeline <NUM> to flow in and allowing mixed liquid of the additive and fed water in the liquid storage cavity <NUM> to flow out at the same time.

A water inlet <NUM> of the feeding device is respectively connected with the connecting pipeline <NUM> and the first water supply pipe section <NUM> through a tee joint <NUM>, so that the water inlet <NUM> communicates with any of the connecting pipeline <NUM> and the first water supply pipe section <NUM>.

A first one-way check valve <NUM> is arranged at the connecting part of the first water supply pipe section <NUM> and the water inlet <NUM> of the feeding device water, the liquid in a pipeline is controlled to only flow from the tee joint <NUM> to the first water supply pipe section <NUM>, and the situation that the liquid in the water supply pipeline <NUM> flows to the connecting pipeline <NUM> through the tee joint <NUM> under the suction force of the pump <NUM> is prevented.

A second one-way check valve <NUM> is arranged on the liquid pumping pipeline <NUM>, or at the connecting part of the liquid pumping pipeline <NUM> and the connecting pipeline <NUM>, or at the connecting part of the liquid pumping pipeline <NUM> and the liquid storage box <NUM>, and the liquid in the pipeline is controlled to only flow from the liquid storage box <NUM> to the connecting pipeline <NUM>. Preferably, the second one-way check valve <NUM> is arranged at the connecting part of the liquid storage box <NUM> and the liquid pumping pipeline <NUM>.

A water path <NUM> is arranged in an upper cover <NUM> of the water box <NUM>, the upper cover <NUM> of the water box is provided with a protruding part <NUM> protruding out of the rear side of the water box <NUM>, at least part of the water path <NUM> is arranged at the protruding part <NUM>, and the water path <NUM> arranged at the protruding part <NUM> at least includes a water supply pipeline <NUM> and a connecting water path <NUM>.

The pump <NUM> is mounted on the outer side of the water box <NUM> and below the protruding part <NUM> of the water box upper cover <NUM>; the liquid storage cavity <NUM> is arranged in the water box <NUM> and located on the rear side of the water box <NUM>. Certainly, the liquid storage cavity <NUM> can be arranged in a gap between the pump <NUM> and the rear side of the water box <NUM>.

The water path <NUM> on the water box <NUM> further includes a second water supply pipeline <NUM>, one end of the second water supply pipeline <NUM> is connected with a second water inlet <NUM> of the feeding device, the other end of the second water supply pipeline <NUM> is connected with the opposite-flushing mechanism <NUM>, and a water inlet <NUM> and the second water inlet <NUM> of the feeding device are respectively provided with a control valve for controlling the on-off of corresponding fed water or are arranged on the same reversing valve. Water is fed into the water inlet <NUM> and the second water inlet <NUM> respectively or simultaneously.

The opposite-flushing mechanism <NUM> includes a first water inlet branch <NUM> and a second water inlet branch <NUM>, and a first water outlet branch <NUM>, a second water outlet branch <NUM> and a third water outlet branch <NUM>, wherein water outlet ends of the first water inlet branch <NUM> and the second water inlet branch <NUM> are staggered by an inclined angle and are arranged on the same side of the opposite-flushing mechanism <NUM>, water inlet ends of the first water outlet branch <NUM>, the second water outlet branch <NUM> and the third water outlet branch <NUM> are arranged on the other opposite side of the opposite-flushing mechanism <NUM>. A second water supply pipe section <NUM> of the water supply pipeline <NUM> communicates with the water inlet end of the first water inlet branch <NUM>, the water outlet end of the first water inlet branch <NUM> is coaxially and oppositely spaced from the water inlet end of the first water outlet branch <NUM>, and when the water supply pipeline <NUM> supplies water independently, a supplied water stream is sprayed out from the water outlet end of the first water inlet branch <NUM> and flows into the water inlet end of the first water outlet branch <NUM>. The second water supply pipeline <NUM> communicates with the water inlet end of the second water inlet branch <NUM>, the water outlet end of the second water inlet branch <NUM> is coaxially and oppositely spaced from the water inlet end of the second water outlet branch <NUM>, and when the second water supply pipeline <NUM> supplies water independently, the supplied water stream is sprayed out from the water outlet end of the second water inlet branch <NUM> and flows into the water inlet end of the second water outlet branch <NUM>. The water inlet end of the third water outlet branch <NUM> is located between the water inlet end of the first water outlet branch <NUM> and the water inlet end of the second water outlet branch <NUM>, when the water supply pipeline <NUM> and the second water supply pipeline <NUM> supply water at the same time, two water streams interfere with each other and are combined into the same supplied water stream, and the supplied water stream flows into the water inlet end of the third water outlet branch <NUM>.

The opposite-flushing mechanism <NUM> is arranged above the rear portion of the water box, the water path below the side of the water outlet end of the water inlet branch of the opposite-flushing mechanism <NUM> is provided with the notch <NUM>, the notch <NUM> enables the water way to communicate with the interior of the water box so that the liquid splashed at the opposite-flushing mechanism can flow into the water box from the notch, and the situation that the opposite flushing is interfered due to the fact that residual water appears at the opposite-flushing mechanism is avoided. Preferably, the inner wall of the water path below the gap between the side of the water outlet end of the water inlet branch and the side of the water inlet end of the water outlet branch of the opposite-flushing mechanism is an inclined plane <NUM> gradually descending towards the direction of the notch.

The water outlet end of the first water outlet branch <NUM> is provided with a washing feeding opening communicating with a main washing cavity in the water box <NUM>, the water outlet end of the second water outlet branch <NUM> communicates with a spraying opening which is formed in the water box <NUM> and communicates with the outside, and the water outlet end of the third water outlet branch <NUM> communicates with a softener throwing opening communicating with a softener cavity in the water box <NUM>.

As shown in <FIG>, the additive feeding device includes the liquid storage box <NUM> for containing an additive, the water path <NUM> for water feeding and a suction structure for pumping the additive in the liquid storage box <NUM> into the water path <NUM>, the liquid storage cavity <NUM> which is connected in series is formed in the water path <NUM>, an opening is formed in the liquid storage cavity <NUM>, the additive pumped into the water path <NUM> flows in from the opening <NUM> for temporary storage, and the additive in the liquid storage cavity <NUM> flows out after being mixed with the fed water.

The liquid storage cavity <NUM> connected with the water supply pipeline <NUM> in series is formed in the water box, so that an additive pumped into the water supply pipeline <NUM> is mixed with fed water in the water supply pipeline <NUM> and then fed, the additive is premixed, and the density of liquid flowing to the opposite-flushing mechanism <NUM> is reduced; therefore, the effect that the liquid flowing out of the water supply pipeline <NUM> can serve as one path of water flow to form an opposite-flushing water stream at the opposite-flushing structure is achieved.

The liquid storage cavity <NUM> is provided with a first opening <NUM>, the first opening <NUM> is connected with the opposite-flushing mechanism <NUM> through a second water supply pipe section <NUM>, the second water supply pipe section <NUM> communicates with the connecting water path <NUM> through the pump <NUM>, and the connecting water path <NUM> communicates with the liquid storage box <NUM> through the liquid pumping pipeline <NUM>. By means of the arrangement, the opening <NUM>, connected with the second water supply pipe section <NUM>, of the liquid storage cavity has the dual functions of allowing the additive pumped into the water supply pipeline <NUM> to flow in and allowing mixed liquid of the additive and fed water in the liquid storage cavity <NUM> to flow out.

A second one-way check valve <NUM> is arranged on the liquid pumping pipeline <NUM>, or the connecting part of the liquid pumping pipeline <NUM> and the connecting pipeline <NUM>, or the connecting part of the liquid pumping pipeline <NUM> and the liquid storage box <NUM>, and the liquid in the pipeline is controlled to only flow from the liquid storage box to the connecting pipeline.

In order to achieve flushing of the pump <NUM> which stops working after additive suction is completed, the connecting pipeline <NUM> communicates with the first water supply pipe section <NUM>, so that part of fed water flows through the connecting pipeline to flush the pump <NUM> and then converges into the downstream of the water supply pipeline <NUM>. Meanwhile, in order to prevent a pump from pumping liquid in the water supply pipeline <NUM> into the connecting pipeline <NUM>, a first one-way check valve <NUM> is arranged on the water supply pipeline <NUM>, and the first one-way check valve <NUM> is located at the end, communicating with the water inlet <NUM>, of the first water supply pipe section <NUM>.

The liquid storage cavity <NUM> is provided with a second opening <NUM>, and the second opening <NUM> communicates with the water inlet <NUM> of the feeding device through the first water supply pipe section <NUM> and used for guiding the fed water in the water supply pipeline <NUM> into the liquid storage cavity <NUM>, so that the temporarily stored additive and the fed water stream are premixed to form an additive and water mixture; along with the increase of fed water stream, the mixture flows into the second water supply pipe section <NUM> from the first opening <NUM> and then is fed through the opposite-flushing mechanism <NUM>; preferably, the connecting pipeline <NUM> communicates with a first water supply pipe section <NUM>, a first one-way check valve <NUM> is arranged on the first water supply pipe section <NUM>, and liquid in the pipeline is controlled to only flow towards the liquid storage cavity <NUM>.

The liquid storage cavity <NUM> is arranged in the water box <NUM> and is close to the rear side wall of the water box <NUM>, so that the liquid storage cavity <NUM> cannot generate interference influence on the liquid storage box <NUM> which is pulled outwards; meanwhile, the liquid storage cavity <NUM> is arranged at the rear part of the water box <NUM>, so that the distance between the water path part arranged on the protruding part <NUM> of the upper cover <NUM> and the liquid storage cavity <NUM> is not too far, and the smoothness of the water stream is ensured.

As shown in <FIG>, the additive feeding device includes the liquid storage box <NUM> for containing an additive and the water path <NUM> for water feeding, the water path <NUM> includes the first water supply pipeline <NUM> and the second water supply pipeline <NUM> which are connected with the opposite-flushing mechanism <NUM> and are used for respectively or simultaneously feeding water to form a plurality of paths of fed water streams. The first water supply pipeline <NUM> is connected with the liquid storage box <NUM> through a suction structure, a liquid storage cavity <NUM> is formed in the first water supply pipeline <NUM>, and the suction structure is used for sucking an additive in the liquid storage box <NUM> into the liquid storage cavity <NUM> and flushing the additive to the opposite-flushing mechanism <NUM> along with water entering the first water supply pipeline <NUM> so as to carry out corresponding feeding.

Through the arrangement of the additive feeding device, the water supply pipeline with the additive feeding function forms a path of fed water stream of the opposite-flushing mechanism, and the additive feeding device can correspondingly feed the liquid additive through the opposite-flushing mechanism; meanwhile, due to the fact that the water supply pipeline is provided with the liquid storage cavity for pre-storing the pumped-out additive, the purpose that the additive is premixed and then fed through the opposite-flushing mechanism is achieved, the density of fed liquid flowing out of the water supply pipeline is reduced, and the device is suitable for opposite flushing and flowing out.

The water path <NUM> is arranged in the water box upper cover <NUM>, the water box upper cover <NUM> is provided with a protruding part <NUM> protruding out of the rear side of the water box <NUM>, at least part of the water path <NUM> is arranged on the protruding part <NUM>, and the water path <NUM> arranged on the protruding part <NUM> at least includes a first water supply pipeline <NUM> and a second water supply pipeline <NUM>.

According to the embodiment, the opposite-flushing mechanism <NUM> is arranged above the rear portion of the water box, the water path below the side of the water outlet end of the water inlet branch of the opposite-flushing mechanism <NUM> is provided with the notch <NUM>, the notch <NUM> enables the water way to communicate with the interior of the water box so that the liquid splashed at the opposite-flushing mechanism can flow into the water box from the notch, and the situation that the opposite flushing is interfered due to the fact that residual water appears at the opposite-flushing mechanism is avoided. Preferably, the inner wall of the water path below the gap between the side of the water outlet end of the water inlet branch and the side of the water inlet end of the water outlet branch of the opposite-flushing mechanism is an inclined plane <NUM> gradually descending towards the direction of the notch.

As shown in <FIG>, the additive feeding device includes the water supply pipeline <NUM>, the water supply pipeline <NUM> is provided with a rising convex part for increasing the height of a water path in the water feeding direction, and the water supply pipeline <NUM> on the upstream of the rising convex part is connected with a liquid storage box <NUM> through a suction structure, and the additive pumped into the water supply pipeline <NUM> flows to the upstream of the water supply pipeline <NUM> in a countercurrent mode under the blocking action of the rising convex part.

According to the embodiment, the liquid storage cavity <NUM> is connected to the water supply pipeline <NUM> in series, and the liquid storage cavity <NUM> is located on the water supply pipeline <NUM> on the upstream of the connecting position of the liquid storage cavity <NUM> and the suction structure, so that the additive flowing in a countercurrent mode enters the liquid storage cavity <NUM> to be temporarily stored under the effect of the rising convex part.

The water supply pipeline <NUM> includes a first water supply pipe section <NUM> and a second water supply pipe section <NUM>, the liquid storage cavity <NUM> communicates with the water inlet <NUM> of the additive feeding device through the first water supply pipe section <NUM>, and the liquid storage cavity <NUM> is connected with the opposite-flushing mechanism <NUM> through the second water supply pipe section <NUM>, so that fed water flows to the opposite-flushing mechanism <NUM> after flowing through the liquid storage cavity <NUM>.

The suction structure is connected with the second water supply pipe section <NUM> so as to feed the pumped additive into the second water supply pipe section <NUM>. The second water supply pipe section <NUM> is internally provided with a first rising convex part <NUM> located on the upstream of the connecting position of the suction structure and a second rising convex part <NUM> located on the downstream of the connecting position of the suction structure, so that the second water supply pipe section <NUM> forms three parts gradually rising in the direction from the liquid storage cavity <NUM> to the opposite-flushing mechanism <NUM>, and the liquid suction structure is connected with the middle height part, and the additive pumped into the water supply pipeline flows into the liquid storage cavity due to the blocking of the first rising convex part under the action of gravity.

The liquid pumping structure is connected with the middle part of the second water supply pipe section <NUM>, the upstream and the downstream of the connecting position are each provided with at least one rising convex part, the first rising convex part <NUM> on the upstream of the connecting position enables an upstream pipeline to be lower than the connecting position, and the second rising convex part <NUM> on the downstream of the connecting position enables a downstream pipeline to be higher than the connecting position, and the additive pumped into the water supply pipeline <NUM> is blocked by the second rising convex part <NUM> and cannot flow out, and is guided by the first rising convex part <NUM> to flow to the liquid storage cavity <NUM> in a countercurrent mode.

The second water supply pipe section <NUM> is provided with two straight line extending parts which extend in parallel, the ends of the same sides of the two straight line extending parts are connected through a bent part, and the ends of the other sides of the two straight line extending parts are connected with a first opening <NUM> of the liquid storage cavity <NUM> and a first water inlet branch <NUM> of the opposite-flushing mechanism <NUM> respectively. Through the arrangement of the second water supply pipe section, the second water supply pipe section has a longer derivative length on the premise that the occupied space is reduced as much as possible, and then the storage volume of the liquid storage cavity is increased.

The suction structure includes a connecting pipeline <NUM> connected with a water supply pipeline <NUM> in parallel, one end of the connecting pipeline <NUM> is connected with a water inlet <NUM> of a feeding device and the water inlet end of a first water supply pipe section <NUM> through a tee joint <NUM>, the other end of the connecting pipeline <NUM> is connected with a pump inlet <NUM> of a pump <NUM>, and a pump outlet <NUM> of the pump <NUM> is connected with the middle part of a second water supply pipe section <NUM> of the water supply pipeline <NUM>; and the middle part of the connecting pipeline <NUM> is connected with the liquid storage box <NUM> through a liquid pumping pipeline <NUM>. By means of the arrangement, the opening, connected with the second water supply pipe section, of the liquid storage cavity has the dual functions of allowing the additive pumped into the water supply pipeline to flow in and allowing mixed liquid of the additive and fed water in the liquid storage cavity to flow out at the same time.

In a preferred embodiment, a boss <NUM> protruding and rising towards the interior of the second water supply pipe section <NUM> is arranged at the connecting position of a pump outlet <NUM> and the second water supply pipe section <NUM>, and the height of the water inlet end of a first water inlet branch <NUM> of the opposite-flushing mechanism <NUM> is larger than that of the boss <NUM>. The height difference between the boss <NUM> and the second water supply pipe section <NUM> is used for forming a first rising convex part <NUM> on the upstream of the connecting position of the pump outlet <NUM> and the second water supply pipe section <NUM>, and the height difference between the boss <NUM> and the water inlet end of the second water inlet branch <NUM> is used for forming a second rising convex part <NUM> on the downstream of the connecting position of the pump outlet <NUM> and the second water supply pipe section <NUM>.

Claim 1:
An additive feeding device, comprising,
a liquid storage box (<NUM>) for containing an additive;
a water supply pipeline (<NUM>) for feeding water;
a suction structure, for sucking the additive in the liquid storage box (<NUM>) into the water supply pipeline (<NUM>), said suction structure comprising a connecting pipeline (<NUM>), which is connected with the liquid storage box (<NUM>), and a pump (<NUM>), which is arranged on the connecting pipeline (<NUM>) for providing suction power, wherein an outlet end of the connecting pipeline (<NUM>) is connected with the water supply pipeline (<NUM>) through said pump (<NUM>), the liquid storage box (<NUM>) is connected with the connecting pipeline (<NUM>) at the upstream of an inlet of the pump (<NUM>) through a liquid pumping pipeline (<NUM>); and an inlet end of the connecting pipeline (<NUM>) communicates with the water supply pipeline (<NUM>); and
a liquid storage cavity (<NUM>)provided with a first opening (<NUM>) connected and communicating with the water supply pipeline (<NUM>) ;
characterized in that
the water supply pipeline (<NUM>) at the downstream (<NUM>) of the first opening (<NUM>) communicates with the liquid storage box (<NUM>) through the suction structure, thereby allowing the additive pumped into the water supply pipeline (<NUM>) to flow into the liquid storage cavity (<NUM>) through the first opening for temporary storage, and the additive in the liquid storage cavity (<NUM>) to be mixed with inlet water and then flow out of the liquid storage cavity (<NUM>) through said first opening (<NUM>).