Patent Publication Number: US-2023160132-A1

Title: Water intake device for washing apparatus, and washing apparatus

Description:
FIELD 
     The present disclosure belongs to the technical field of washing apparatus, and specifically provides a water inflow device for a washing apparatus, and a washing apparatus. 
     BACKGROUND 
     Washing apparatuses include washing machines, shoe washers and dish washers, etc., which generally wash with water, that is, water inflow is required in all of them during washing. 
     With the continuous progress and development of science and technology, the functions of washing apparatuses are developing towards being more and more diverse, and some of these functions also need to be realized through water inflow. For example, for a washing machine with a clothing drying function, water needs to be supplied into a condenser during drying so as to condense drying air. Since different functions have different requirements on the flow rate of water inflow, in order to realize the functions related to water inflow, water inflow pipelines are generally added in the prior art. However, one pipeline is added with the addition of each function, which causes an overall structure to be bulky and leads to increase of the cost. 
     Taking the washing machine as an example, in order to meet the continuous increase of user&#39;s requirements on use, a drying function is generally added in the existing washing machines. However, since the water supply of two different flow rates is required when supplying water to the condenser, a small-flow continuous water supply and a large-flow water supply are adopted, in which the small-flow continuous water supply provides condensed water, and the large-flow water supply provides functions such as flushing and drying condenser lint. To this end, two independent water inflow pipelines are further added in the washing machine, and an independent solenoid valve is provided in each of these two water inflow pipelines to achieve water supply of different flow rates, which makes the water inflow structure to be bulkier and the manufacture cost to be higher. 
     Accordingly, there is need in the art for a water inflow device for a washing apparatus and a washing apparatus to solve the above problem. 
     SUMMARY 
     In order to solve the above problem in the prior art, that is, to solve the problem that the water inflow structures of existing washing apparatuses are bulky and have a high cost, the present disclosure provides a water inflow device for a washing apparatus, in which the water inflow device includes a body, as well as a first water inflow assembly, a second water inflow assembly, a communication assembly, a first flow restriction member and a second flow restriction member that are arranged on the body; the first flow restriction member and the second flow restriction member are arranged in sequence on the first water inflow assembly in a water flow direction, and a flow rate of the first flow restriction member is smaller than a flow rate of the second flow restriction member; the communication assembly includes a communication pipeline for communicating the first water inflow assembly with the second water inflow assembly, and an on-off control valve for controlling on and off of the communication pipeline; and a connection position between the first water inflow assembly and the communication pipeline is located between the first flow restriction member and the second flow restriction member. 
     In a preferred technical solution of the above water inflow device, the first water inflow assembly includes a first control valve and a first water inflow pipeline that are connected, the first flow restriction member is arranged inside an outlet of the first control valve, and the second flow restriction member is arranged inside the first water inflow pipeline. 
     In a preferred technical solution of the above water inflow device, the second water inflow assembly includes a second control valve and a second water inflow pipeline, and the second control valve includes a first outlet and a second outlet, in which the first outlet communicates with the communication pipeline, and the second outlet communicates with the second water inflow pipeline. 
     In a preferred technical solution of the above water inflow device, the numbers of the second control valve and the second water inflow pipeline are both two, and the second control valves and the second water inflow pipelines correspond to each other in a one-to-one correspondence. 
     In a preferred technical solution of the above water inflow device, the on-off control valve is a one-way check valve, and the number of the one-way check valve is two; the one-way check valves are respectively arranged inside the first outlets of the two second control valves to prevent water from entering the second control valves from the first outlets. 
     In a preferred technical solution of the above water inflow device, the water inflow device further includes third flow restriction members, the number of which is two, and the third flow restriction members are respectively arranged inside the two second water inflow pipelines. 
     In a preferred technical solution of the above water inflow device, the first control valve is a solenoid valve. 
     In a preferred technical solution of the above water inflow device, the second control valve is a solenoid valve. 
     In another aspect, the present disclosure also provides a washing apparatus, and the washing apparatus includes the water inflow device described above. 
     In a preferred technical solution of the above washing apparatus, the washing apparatus is a washing machine which includes a condenser and a detergent dispenser, the first water inflow assembly communicates with the condenser, and the second water inflow assembly communicates with the detergent dispenser. 
     It can be understood by those skilled in the art that in the preferred technical solutions of the present disclosure, the first flow restriction member and the second flow restriction member are arranged in sequence on the first water inflow assembly in the water flow direction, the flow rate of the first flow restriction member is smaller than the flow rate of the second flow restriction member, the communication assembly communicates the first water inflow assembly with the second water inflow assembly, and the connection position between the first water inflow assembly and the communication assembly is located between the first flow restriction member and the second flow restriction member. Through such an arrangement, the first water inflow assembly can provide water supply of two flow rates; as compared with the prior art, the volume of the water inflow device is smaller and the manufacture cost is lower; in addition, by providing the first flow restriction member and the second flow restriction member, a more accurate flow control can be realized, and in practical applications, different models of flow restriction members can be substituted according to different functions, which is convenient and flexible, and has a wider application range. 
     In addition, the washing apparatus further provided by the present disclosure on the basis of the above technical solutions, due to the adoption of the water inflow device described above, has the technical effects that the above water inflow device has, and as compared with the washing apparatus before the improvement, the washing apparatus of the present disclosure has a lower manufacture cost. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
       Preferred embodiments of the present disclosure will be described below with reference to the accompanying drawing and in connection with a washing machine. In the drawings: 
         FIG.  1    is a first schematic structural view of a water inflow device of the present disclosure; 
         FIG.  2    is a second schematic structural view of the water inflow device of the present disclosure; 
         FIG.  3    is a third schematic structural view of the water inflow device of the present disclosure; 
         FIG.  4    is a cross sectional view of  FIG.  3   ; 
         FIG.  5    is a partially enlarged view of  FIG.  4   ; 
         FIG.  6    is a fourth schematic structural view of the water inflow device of the present disclosure; 
         FIG.  7    is a fifth schematic structural view of the water inflow device of the present disclosure; 
         FIG.  8    is a schematic structural view of a cover plate of the water inflow device of the present disclosure; 
         FIG.  9    is a first schematic structural view of a one-way check valve of the water inflow device of the present disclosure; 
         FIG.  10    is a second schematic structural view of the one-way check valve of the water inflow device of the present disclosure; 
         FIG.  11    is a first schematic structural view of a flow restriction member of the water inflow device of the present disclosure; 
         FIG.  12    is a second schematic structural view of the flow restriction member of the water inflow device of the present disclosure; 
         FIG.  13    is a schematic structural view of a flow restriction seat of the flow restriction member of the present disclosure; and 
         FIG.  14    is a schematic structural view of a detergent dispenser of the washing machine of the present disclosure. 
     
    
    
     LIST OF REFERENCE SIGNS 
     1: first water inflow assembly;  11 : first control valve (first solenoid valve);  12 : first water inflow pipeline;  111 : outlet (outlet of the first solenoid valve);  121 : water inlet (water inlet of the first water inflow pipeline); 
     2: second water inflow assembly;  21 : second control valve (second solenoid valve);  22 : second water inflow pipeline;  211 : first outlet (first outlet of the second solenoid valve);  212 : second outlet (second outlet of the second solenoid valve); 
     3: communication assembly;  31 : communication pipeline;  32 : on-off control valve (one-way check valve);  311 : annular plate;  312 : cover plate;  3121 : guide hole;  321 : valve seat;  322 : return spring;  323 : sealing ring;  324 : guide column; 
     4: first flow restriction member; 
     5: second flow restriction member;  51 : flow restriction seat;  52 : flow restriction plate;  511 : flow restriction hole;  512 : connection shaft;  513 : protrusion;  514 : sealing ring; 
     6: third flow restriction member; 
     7: body;  71 : centralized water supply port; 
     8: detergent dispenser;  81 : first functional area;  82 : second functional area;  83 : third functional area;  84 : water inflow pipe;  841 : water outflow section. 
     DETAILED DESCRIPTION 
     Preferred embodiments of the present disclosure will be described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principle of the present disclosure, and are not intended to limit the scope of protection of the present disclosure. For example, although the following embodiments are explained and described in connection with a washing machine, this is not limiting. In addition, the technical solutions of the present disclosure are equally applicable to other washing apparatuses, such as shoe washers, dish washers, or washing-drying integrated machines, etc., and such changes to the application object do not deviate from the principle and scope of the present disclosure. 
     It should be noted that in the description of the present disclosure, terms indicating directional or positional relationships, such as “upper”, “lower”, “left”, “right”, “front”, “rear”, “top”, “bottom”, “inner”, “outer” and the like, are based on the directional or positional relationships shown in the accompanying drawings. They are only used for ease of description, and do not indicate or imply that the device or element must have a specific orientation, or be constructed or operated in a specific orientation, and therefore they should not be considered as limitations to the present disclosure. In addition, terms “first”, “second” and “third” are only used for descriptive purposes, and should not be interpreted as indicating or implying relative importance. 
     In addition, it should also be noted that in the description of the present disclosure, unless otherwise clearly specified and defined, terms “install”, “connect” and “connection” should be understood in a broad sense; for example, the connection may be a fixed connection, or may also be a detachable connection, or an integral connection; it may be a mechanical connection, or an electrical connection; it may be a direct connection, or an indirect connection implemented through an intermediate medium, or it may be internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be interpreted according to specific situations. 
     In view of the problem pointed out in the “BACKGROUND OF THE INVENTION” that the water inflow structures of the existing washing machines are bulky and have a high cost, the present disclosure provides a water inflow device for a washing machine, and a washing machine, aiming at reducing the volume of the water inflow device and lowering the manufacture cost of the water inflow device. 
     Specifically, the washing machine of the present disclosure includes a cabinet, as well as a condenser, a detergent dispenser and a water inflow device that are arranged inside the cabinet. The water inflow device includes a body, as well as a first water inflow assembly, a second water inflow assembly, a communication assembly, a first flow restriction member and a second flow restriction member that are arranged on the body; the first flow restriction member and the second flow restriction member are arranged in sequence on the first water inflow assembly in a water flow direction, and a flow rate of the first flow restriction member is smaller than a flow rate of the second flow restriction member; the first water inflow assembly communicates with the condenser, and the second water inflow assembly communicates with the detergent dispenser; the communication assembly includes a communication pipeline for communicating the first water inflow assembly with the second water inflow assembly, and an on-off control valve for controlling on and off of the communication pipeline; and a connection position between the first water inflow assembly and the communication pipeline is located between the first flow restriction member and the second flow restriction member. 
     When the first water inflow assembly is connected with an external water supply source, the second water inflow assembly is disconnected from the external water supply source and the on-off control valve is closed, water enters the first water inflow assembly; under the flow restriction action of the first flow restriction member, the first water inflow assembly supplies water to the condenser at a small flow rate. It should be noted that since the flow rate of the first flow restriction member is smaller than the flow rate of the second flow restriction member, the second flow restriction member does not have a flow restriction effect at this time. 
     When the first water inflow assembly is disconnected from the external water supply source, the second water inflow assembly is connected with the external water supply source and the on-off control valve is opened, water enters the second water inflow assembly, and then is divided into two streams of water, one of which enters the first water inflow assembly through the communication pipeline. Since the connection position between the first water inflow assembly and the communication pipeline is located between the first flow restriction member and the second flow restriction member, the water no longer flows through the first flow restriction member, and directly flows to the second flow restriction member. Under the flow restriction action of the second flow restriction member, the first water inflow assembly supplies water to the condenser at a large flow rate. 
     Through such an arrangement, the first water inflow assembly can realize water supply of two flow rates; as compared with the prior art, the volume of the water inflow device is smaller and the manufacture cost is lower. 
     In addition, by providing the first flow restriction member and the second flow restriction member on the first water inflow assembly, a more accurate flow control can be realized, and in practical applications, different models of flow restriction members can be substituted according to different functions, which is convenient and flexible, and has a wider application range. 
     The technical solutions of the present disclosure will be described in detail below in connection with three specific embodiments. 
     First Embodiment 
     As shown in  FIGS.  1 ,  2  and  6   , the water inflow device of the present disclosure includes a body  7 , as well as a first water inflow assembly  1 , a second water inflow assembly  2 , a communication assembly  3 , a first flow restriction member  4 , a second flow restriction member  5  and a third flow restriction member  6  that are arranged on the body  7 . A centralized water supply port  71  is formed on the body  7 . The centralized water supply port  71  is connected with an external water supply source, and both the first water inflow assembly  1  and the second water inflow assembly  2  communicate with the centralized water supply port  71 . 
     It should be noted that two independent water supply ports can also be used for the first water inflow assembly  1  and the second water inflow assembly  2 , or the first water inflow assembly  1  and the second water inflow assembly  2  can be directly connected with the external water supply source. Such flexible adjustments and changes do not deviate from the principle and scope of the present disclosure, and should be defined within the scope of protection of the present disclosure. 
     As shown in  FIGS.  1 ,  2  and  6   , the first water inflow assembly  1  includes a first control valve  11  and a first water inflow pipeline  12 . The first control valve  11  is preferably a solenoid valve, denoted as a first solenoid valve  11 . An inlet (not shown) of the first solenoid valve  11  communicates with the centralized water supply port  71 , and an outlet  111  of the first solenoid valve  11  communicates with a water inlet  121  of the first water inflow pipeline  12 . The first solenoid valve  11  can control on and off of the connection between the first water inflow pipeline  12  and the centralized water supply port  71 . The first flow restriction member  4  is arranged inside the outlet  111  of the first solenoid valve  11  (see  FIG.  6    for details), and the second flow restriction member  5  is arranged inside the first water inflow pipeline  12  (see  FIG.  2    for details), that is, the first flow restriction member  4  and the second flow restriction member  5  are arranged in sequence in a water flow direction, and the flow rate of the first flow restriction member  4  is smaller than the flow rate of the second flow restriction member  5 . 
     As shown in  FIGS.  1 ,  2 ,  6  and  7   , the second water inflow assembly  2  includes a second control valve  21  and a second water inflow pipeline  22 . An inlet (not shown) of the second control valve  21  communicates with the centralized water supply port  71 . The second control valve  21  includes two outlets, denoted as a first outlet  211  and a second outlet  212 . The first outlet  211  communicates with the communication assembly  3  (see  FIG.  6    for details), and the second outlet  212  communicates with the second water inflow pipeline  22  (see  FIG.  7    for details). In a preferred situation, the number of the second control valve  21  and the number of the second water inflow pipeline  22  are both two, and the second control valves  21  correspond to the second water inflow pipelines  22  in a one-to-one correspondence. The second control valves  21  are also preferably solenoid valves, denoted as second solenoid valves  21 , which can control on and off of the connection between the second water inflow pipelines  22  and the centralized water supply port  71 , as well as the connection between the communication assembly  3  and the centralized water supply port  71 . 
     As shown in  FIGS.  1 ,  2 ,  6  and  7   , the communication assembly  3  includes a communication pipeline  31  for communicating the first water inflow assembly  1  with the second water inflow assembly  2 , and on-off control valves  32  for controlling on and off of the communication pipeline  31 . A connection position between the first water inflow assembly  1  and the communication pipeline  31  is located between the first flow restriction member  4  and the second flow restriction member  5 . One end of the communication pipeline  31  communicates with the water inlet  121  of the first water inflow pipeline  12  (the water inlet  121  is located between the first flow restriction member  4  and the second flow restriction member  5 ), and the other end of the communication pipeline  31  communicates with both the second outlets  212  of the two second control valves  21 ; the on-off control valves  32  are preferably one-way check valves  32 , and the number of the one-way check valves  32  is also two. The one-way check valves  32  are respectively arranged inside the first outlets  211  of the two second solenoid valves  21  (see  FIG.  6    for details) to prevent water from entering the second solenoid valves  21  from the first outlets  211 ; the number of the third flow restriction members  6  is also two, and they are respectively arranged inside the two second water inflow pipelines  22  (see  FIG.  2    for details). 
     As shown in  FIGS.  1 ,  2 ,  7  and  8   , the communication pipeline  31  includes an annular plate  311  and a cover plate  312 . A bottom of the annular plate  311  is sealedly connected with the body  7  of the water inflow device, and a top of the annular plate  311  is sealedly connected with the cover plate  312 , so that a sealed communication pipeline  31  is formed. In a preferred situation, the annular plate  311  and the body  7  are integrally formed, and the annular plate  311  is fixedly connected with the cover plate  312  to facilitate inspection and replacement of the first flow restriction member  4  and the one-way check valves  32 . 
     It should be noted that the specific structure of the communication pipeline  31  is not limited to the above specific structural form. For example, the communication pipeline  31  may be provided as a circular pipe; one end of the circular pipe is connected with the first water inflow pipeline  12 , and a side wall of the circular pipe is provided with two ports, which communicate with the first outlets  211  of the two second solenoid valves  21  respectively, etc. Such adjustments and changes to the specific structural form of the communication pipeline  31  do not deviation from the principle and scope of the present disclosure, and should all be defined within the scope of protection of the present disclosure. 
     The working principle of the water inflow device of the present disclosure will be described below. 
     When the first solenoid valve  11  is turned on and the second solenoid valve  21  is turned off, water enters the first water inflow pipeline  12  through the first solenoid valve  11 , and under the flow restriction action of the first flow restriction member  4 , the flow rate of the water entering the first water inflow pipeline  12  is relatively small, so that the first water inflow pipeline  12  can supply water at a small flow rate. In addition, under the action of the one-way check valves  32 , the water flow will not enter the second solenoid valves  21 , nor will it enter the second water inflow pipelines  22 , that is, in this case, only the first water inflow pipeline  12  supplies water at a small flow rate. 
     When the first solenoid valve  11  is turned off, one of the two second solenoid valves  21  is turned on and the other is turned off, the water is divided into two streams after entering the second solenoid valve  21  that is turned on; one of two streams of water flows through the first outlet  211  of this second solenoid valve  21  and enters the communication pipeline  31 . Since the communication pipeline  31  is connected with the water inlet  121  of the first water inflow pipeline  12  (the water inlet  121  is located between the first flow restriction member  4  and the second flow restriction member  5 ), this stream of water will not pass through the first flow restriction member  4 , but will directly enter the first water inflow pipeline  12  along the communication pipeline  31 . Under the flow restriction action of the second flow restriction member  5 , the second water inflow pipeline  22  can supply water at a large flow rate. The other stream of water flows into the second water inflow pipeline  22  through the second outlet  212  of this second solenoid valve  21 . In addition, under the action of the one-way check valve  32 , the water flow entering the communication pipeline  31  will not enter the second solenoid valve  21  in the turned-off state, nor will it enter the second water inflow pipeline  22  communicating with the second solenoid valve  21  in the turned-off state. That is, in this situation, the first water inflow pipeline  12  supplies water at a large flow rate, and one of the two second water inflow pipelines  22  supplies water. Moreover, the two second water inflow pipelines  22  of the second water inflow assembly  2  can supply water independently without being affected by each other. 
     When the first solenoid valve  11  is turned off and the two second solenoid valves  21  are both turned on, the water enters the two second solenoid valves  21  and then is each divided into two streams. Taking one of the paths (the second solenoid valve  21 +the second water inflow pipeline  22 ) as an example, one of the two streams of water enters the communication pipeline  31  through the first outlet  211  of the second solenoid valve  21 , and then enters the first water inflow pipeline  12  along the communication pipeline  31 ; under the flow restriction action of the second flow restriction member  5 , the second water inflow pipeline  22  can supply water at a large flow rate; moreover, under the flow restriction action of the second flow restriction member  5 , no matter whether one of the second solenoid valves  21  is turned on or both the second solenoid valves  21  are turned on, the water supply volume of the second water inflow pipeline  22  remains unchanged, so that a precise flow control is realized; the other stream of water enters the second water inflow pipeline  22  through the second outlet  212  of the second solenoid valve  21 . Moreover, since the structures of the two paths (the second solenoid valve  21 +the second water inflow pipeline  22 ) are completely identical, the flow rates of the two second water inflow pipelines  22  are the same at this time. That is, in this situation, the first water inflow pipeline  12  supplies water at a large flow rate, and the two second water inflow pipelines  22  supply water at the same time with the same water supply volume. 
     Through such an arrangement, the water inflow device of the present disclosure at least has the following advantages. 
     First, the first water inflow pipeline  12  can realize water supply of two different flow rates, so that one solenoid valve (the price of which is relatively expensive) and one water inflow pipeline are cancelled, and further the volume and manufacture cost of the water inflow device can be reduced; 
     Second, by providing the flow restriction members (the first flow restriction member  4 , the second flow restriction member  5  and the third flow restriction member  6 ), an accurate control of the flow rate can be achieved, and in practical applications, different models of flow restriction members can be substituted according to different functions, which is convenient and flexible, and has a wider application range; 
     Third, the two second water inflow pipelines  22  can not only supply water independently (complementary influence), but also can supply water at the same time with the same water supply volume. When the two second water inflow pipelines  22  supply water at the same time, opposed impact can be realized to change the flow direction of water, so that one solenoid valve and one water inflow pipeline can be further cancelled. Specifically, in a possible situation, as shown in  FIG.  14   , the detergent dispenser  8  includes a housing, and an interior of the housing is provided with three functional areas, namely, a first functional area  81 , a second functional area  82  and a third functional area  83 , which can be used to store different detergents; the detergent dispenser  8  further includes two water inflow pipes  84  communicating with the first functional area  81 , the second functional area  82  and the third functional area  83 ; outlets of outlet sections  841  of the two water inflow pipes  84  are arranged opposite to each other and obliquely, and the two water inflow pipes  84  are connected with the two second water inflow pipelines  22  respectively. When water is supplied only from the water inflow pipe  84  on the left side, the water flows into the third functional area  83 ; when water is supplied only from the water inflow pipe  84  on the right side, the water flows into the first functional area  81 ; and when water is supplied from the two water inflow pipes  84  at the same time, the two streams of water impact each other opposedly, and the flow direction of water changes before flowing into the second functional area  82 . That is, water supply to the three functional areas can be realized through the two second water inflow pipelines  22 , thereby cancelling one solenoid valve and one water inflow pipeline, and further reducing the volume and manufacture cost of the water inflow device. 
     The structure of a kind of one-way check valve  32  will be described in detail below with reference to  FIGS.  9  and  10   . 
     As shown in  FIGS.  9  and  10   , the one-way check valve  32  includes a valve seat  321 , a return spring  322  and a sealing ring  323 . The valve seat  321  is provided with a guide column  324 , the return spring  322  is sleeved over the guide column  324 , and the sealing ring  323  is sleeved over the valve seat  321 . 
     In an installed state (the one-way check valve  32  is installed inside the first outlet  211  of the second solenoid valve  21 ), as shown in  FIGS.  3 ,  4  and  5   , a bottom end of the return spring  322  abuts against the valve seat  321 , and a top end of the return spring  322  abuts against the cover plate  312  of the communication pipeline  31 ; a guide hole  3121  is arranged on the cover plate  312  (see  FIG.  8    for details), and a top of the guide column  324  is inserted into the guide hole  3121 . After the water enters the second solenoid valve  21 , it moves upward whiling pushing the valve seat  321 , so as to open the first outlet  211 , and the water enters the communication pipeline  31  from the first outlet  211 . After water inflow is completed, the valve seat  321  moves downward under the action of the return spring  322  to seal the first outlet  211  again. In the sealed state, the sealing ring  323  is located between an inner wall of the first outlet  211  and the valve seat  321 . 
     It should be noted that the structure of the above one-way check valve  32  does not limit the present disclosure, and one-way check valves  32  using other structures are also within the scope of protection of the present disclosure. 
     The structure of a kind of flow restriction member will be described in detail below with reference to  FIGS.  11  to  13   . 
     First, it should be noted that in this embodiment, flow restriction members of the same type are used for the first flow restriction member  4 , the second flow restriction member  5  and the third flow restriction member  6 . Taking the second flow restriction member  5  as an example, as shown in  FIGS.  11  to  13   , it includes a flow restriction seat  51  and a flow restriction plate  52 . The flow restriction seat  51  is provided with flow restriction holes  511 , a connection shaft  512 , protrusions  513  and a sealing ring  514 . The flow restriction plate  52  is sleeved over the connection shaft  512 , and a right side of the flow restriction plate  52  abuts against the protrusions  513  so that there is a gap between the flow restriction plate  52  and the flow restriction seat  51 . The gap serves to restrict the flow, and a size of the gap determines the magnitude of the flow rate. The gap is in communication with the flow restriction holes  511 , and water flows out from the flow restriction holes  511 . In an installed state, the sealing ring  514  abuts against an inner wall of the first water inflow pipeline  12 . 
     It should be noted that the above type of flow restriction members can be used for each of the first flow restriction member  4 , the second flow restriction member  5  and the third flow restriction member  6 , or other different types of flow restriction members can also be used for them respectively. Such flexible adjustments and changes do not deviate from the principle and scope of the present disclosure, and should all be defined within the scope of protection of the present disclosure. 
     In addition, it should also be noted that although the present disclosure only provides an embodiment for the flow restriction members, it should be understood by those skilled in the art that the contribution of the present disclosure to the prior art is mainly reflected in that the first flow restriction member  4  (small flow rate) and the second flow restriction member  5  (large flow rate) are arranged in sequence on the first water inflow assembly  1  in the water flow direction, and the connection position between the first water inflow assembly  1  and the communication assembly  3  is located between the first flow restriction member  4  and the second flow restriction member  5 , so that the first water inflow assembly  1  can achieve water supply of two flow rates, and can achieve a more accurate flow control. Therefore, the use of other structures of flow restriction members is also within the scope of protection of the present disclosure. 
     Second Embodiment 
     On the basis of not changing other arrangement conditions of the first embodiment, the third flow restriction member  6  is cancelled. When the function corresponding to the second water inflow assembly  2  does not have a high requirement on the flow rate of water inflow, the third flow restriction member  6  can be cancelled. 
     Third Embodiment 
     On the basis of not changing other arrangement conditions of the first embodiment, one of the second solenoid valves  21 , one of the one-way check valves  32 , one of the second water inflow pipelines  22  and one of the third flow restriction members  6  are cancelled. That is, the second water inflow assembly  2  includes only one second solenoid valve  21  and only one second water inflow pipeline  22 , and the number of the one-way check valve  32  and the number of the third flow restriction member  6  are both one. The one-way check valve  32  is arranged inside the first outlet  211  of the second solenoid valve  21 , and the third flow restriction member  6  is arranged inside the second water inflow pipeline  22 . 
     Hitherto, the technical solutions of the present disclosure have been described in connection with the preferred embodiments shown in the accompanying drawings, but it is easily understood by those skilled in the art that the scope of protection of the present disclosure is obviously not limited to these specific embodiments. Without departing from the principles of the present disclosure, those skilled in the art can make equivalent changes or replacements to relevant technical features. All these technical solutions after such changes or replacements will fall within the scope of protection of the present disclosure.