A pumping mechanism, feeding box and washing machine for automatically feeding liquid

Abstract

The present invention provides a pumping mechanism for automatically dispensing liquid, including a pumping mechanism body arranged in an automatic dispensing feeding box body, and the pumping mechanism body includes a piston connecting rod assembly and a driving assembly; wherein the piston connecting rod assembly and the inner wall of the piston cavity form a sealed pumping chamber, and the driving assembly drives the piston connecting rod assembly to reciprocate in the piston cavity, changing the pressure in the pumping chamber, so that the liquid in the liquid storage chamber that is unidirectionally connected to the pumping chamber flows into the pumping chamber or the liquid in the pumping chamber flows out, thereby realizing the pumping or releasing of liquid. The present invention also provides a single-chamber piston type automatic liquid dispensing feeding box and a washing machine. The pumping mechanism provided by the present invention has a simple and compact structure, is arranged in the body of the single-chamber piston type automatic liquid dispensing feeding box, occupies a small space, and enables the automatic dispensing feeding box body to accurately control the amount of liquid automatically dispensed.

Description

Technical Field

[0001] The invention relates to the technical field of household appliances, and in particular to a pumping mechanism, a feeding box and a washing machine for automatically feeding liquid. Background Art

[0002] At present, all types of drum washing machines are equipped with a material box assembly for adding washing liquids such as washing powder / washing liquid / softener, and users can choose and put them in according to their own needs. The material box assembly provided by the prior art includes a handle, an upper and lower box body, and a washing liquid box. Before washing, the washing liquid box needs to be manually pulled and pushed, and then the washing powder, washing liquid or softener is put in the corresponding position of the washing liquid box. If the user has other items in his hand, it will be inconvenient to extract the washing liquid box.

[0003] In addition, the amount of laundry detergent is difficult to control when it is manually dispensed, which will have a direct impact on the washing effect. Market data shows that users use more laundry detergent, and fewer users use softener or disinfectant. And as people's requirements for living standards become higher and higher, the intelligence of home appliances is more dependent on the actual needs of customers. Designing a single-cavity automatic dispensing feeding box, users can dispense laundry detergent into the washing machine according to their own needs, which has become a technical problem that urgently needs to be solved in this technical field. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, the present invention provides an automatic liquid delivery mechanism which has a simple structure and can be used to accurately control the amount of liquid drawn or delivered, thereby achieving accurate automatic delivery.

[0005] In order to achieve the above objectives, the present invention is implemented through the following technical solutions.

[0006] One object of the present invention is to provide a pumping mechanism for automatically dispensing liquid, comprising a pumping mechanism body disposed in an automatic dispensing feeding box body, the pumping mechanism body comprising a piston connecting rod assembly and a driving assembly connected to the piston connecting rod assembly, the piston connecting rod assembly being movably disposed in a piston cavity in the automatic dispensing feeding box body; wherein,

[0007] The piston-connecting rod assembly and the inner wall of the piston chamber form a sealed pumping and releasing chamber. The driving assembly drives the piston-connecting rod assembly to reciprocate in the piston chamber, changing the pressure in the pumping and releasing chamber so that the liquid in the liquid storage chamber that is unidirectionally connected to the pumping and releasing chamber flows into the pumping and releasing chamber or the liquid in the pumping and releasing chamber flows out, thereby realizing the pumping or releasing of liquid.

[0008] Preferably, the piston connecting rod assembly includes a piston connecting rod and a piston head, the piston head is in contact with the inner wall of the piston cavity to seal the pumping cavity; one end of the piston connecting rod is connected to the piston head, and the other end is connected to the driving assembly.

[0009] Preferably, the driving assembly comprises a motor, a rotating member, and a convex rod, wherein the convex rod is eccentrically arranged on one side of a surface of the rotating member, the rotating member is connected to the motor relative to the other side of the convex rod, one end of the piston connecting rod is provided with a long hole, and one end of the convex rod is movably arranged in the long hole; wherein,

[0010] The moving component drives the rotating member to move, so that the protruding rod reciprocates in the long hole, so as to guide the piston connecting rod assembly to reciprocate in the piston cavity.

[0011] Preferably, the length direction of the long hole is perpendicular to the reciprocating motion direction of the piston-connecting rod assembly.

[0012] Preferably, the rotating member and the convex rod are both cylindrical, the motor drives the convex rod to perform circular motion, and the length of the long hole is greater than or equal to the diameter of the circle where the circular motion path of the convex rod lies.

[0013] Preferably, the motor drives the convex rod to reciprocate along an arc path, and the length of the long hole is smaller than the radius of the circle where the arc motion path of the convex rod lies.

[0014] Preferably, at least one circle of piston rubber ring for sealing is provided around the piston head.

[0015] The second object of the present invention is to provide a single-chamber piston-type automatic liquid feeding box, comprising an automatic feeding box body, the automatic feeding box body comprising a shell, a liquid storage chamber and a piston chamber arranged in the shell, and a pumping mechanism body as described above, the piston connecting rod assembly and the inner wall of the piston chamber form a sealed pumping chamber, the liquid storage chamber is in one-way communication with the pumping chamber; wherein,

[0016] The pumping mechanism body changes the pressure in the pumping chamber to make the liquid in the liquid storage chamber flow into the pumping chamber or the liquid in the pumping chamber flow out, so as to realize automatic liquid delivery.

[0017] Preferably, a one-way valve is respectively provided at the suction port of the pumping chamber and the liquid storage chamber, and at the discharge port of the pumping chamber, and the one-way valve is opened or closed as the pressure in the pumping chamber changes.

[0018] Preferably, the first one-way valve disposed at the suction port of the pumping chamber comprises a first one-way valve hole disposed on a side wall connecting the pumping chamber and the liquid storage chamber, and a first valve hole plug covering one end of the first one-way valve hole facing the pumping chamber, so that the pumping chamber and the liquid storage chamber are connected in one direction; the second one-way valve disposed at the discharge port of the pumping chamber comprises a second one-way valve hole disposed on a side wall on one side of the pumping chamber, and a second valve hole plug covering the outer end of the second one-way valve hole; wherein,

[0019] The movement of the piston-connecting rod assembly changes the pressure in the pumping chamber, causing the first valve hole plug or the second valve hole plug to be elastically deformed and opened, thereby opening the first one-way valve or the second one-way valve.

[0020] Preferably, the protruding rod of the pumping mechanism body is located in the middle of the long hole of the pumping mechanism body and closest to the piston chamber, and the piston head of the pumping mechanism body is located away from the first one-way valve and close to the second one-way valve. At this time, the first one-way valve and the second one-way valve are both in a closed state.

[0021] Preferably, the piston chamber is located at the bottom of the liquid storage chamber or close to the bottom of the liquid storage chamber.

[0022] Preferably, the first one-way valve is close to the bottom of the liquid storage chamber.

[0023] Preferably, the shell is provided with a delivery port for delivering liquid into the liquid storage cavity.

[0024] The third object of the present invention is to provide a washing machine, comprising a washing machine body, and also comprising the automatic feeding box body as described above arranged in the washing machine body, wherein the extraction mechanism body is fixedly connected to the washing machine body.

[0025] Preferably, the extraction cavity is in one-way communication with the liquid guiding cavity of the washing machine.

[0026] Preferably, the draw-out cavity is arranged separately from the liquid-conducting cavity of the washing machine, and the discharge port of the draw-out cavity is aligned with the liquid-conducting cavity of the washing machine.

[0027] Preferably, the shell can be partially popped out or pulled out relative to the washing machine body, so that the loading port of the shell is partially or completely exposed to the washing machine body.

[0028] Preferably, the outer wall of the shell is provided with a limit block for limiting the distance that the shell is ejected or pulled out relative to the washing machine body.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] (1) The automatic liquid delivery mechanism provided by the present invention has a simple structure and can be used to accurately control the amount of liquid delivered or delivered, thereby achieving accurate automatic delivery. The main body of the delivery mechanism has a compact structure and occupies a small space. It is arranged in a device that needs to deliver liquid without affecting the overall volume of the device, and the requirements for the internal structural arrangement of the device are not strict.

[0031] (2) In a preferred embodiment of the present invention, the reciprocating distance of the piston-connecting rod assembly in the piston chamber is precisely controlled by means of a rotating member, a protruding rod eccentrically arranged on a surface of the rotating member, and a long hole arranged on the piston connecting rod, so that the pressure in the delivery chamber can be precisely controlled.

[0032] (3) The washing machine provided by the present invention is provided with a limit block on the outer wall of the shell in the automatic feeding box body inside the washing machine body, so as to accurately control the distance that the shell is popped out or drawn out when liquid needs to be stored in the liquid storage cavity, so that the storage of liquid in the storage cavity will not affect the subsequent extraction or release amount of the extraction and discharge cavity, thereby facilitating the accurate control of the automatic feeding amount of the liquid.

[0033] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. The specific implementation of the present invention is given in detail by the following embodiments and their accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0035] Figure 1 It is a schematic diagram of the three-dimensional structure of the extraction and extraction mechanism body in one embodiment of the present invention;

[0036] Figure 2 It is a schematic diagram of the three-dimensional structure of the extraction and extraction mechanism body in another embodiment of the present invention;

[0037] Figure 3 The three-dimensional structure diagram of the automatic feeding box body of the present invention is Figure 1 ;

[0038] Figure 4 The three-dimensional structure diagram of the automatic feeding box body of the present invention is Figure 2 ;

[0039] Figure 5 It is a cross-sectional view of the automatic feeding box body of the present invention;

[0040] Figure 6 For the present invention Figure 5A magnified view of the structure at center A;

[0041] Figure 7 Schematic diagram of the three-dimensional structure of the first one-way valve in one embodiment of the present invention.

[0042] In the figure:

[0043] 100, extraction and extraction mechanism body; 11, piston connecting rod assembly; 111, piston connecting rod; 111a, long hole; 112, piston head; 113, piston rubber ring; 12, driving assembly; 121, rotating part; 122, convex rod;

[0044] 200, automatic feeding box body; 21, shell; 211, feeding port; 212, limit block; 22, liquid storage chamber; 23, piston chamber; 231, extraction chamber; 24, one-way valve; 241, first one-way valve; 2411, first one-way valve hole; 2412, first valve hole plug; 242, second one-way valve; 2421, second one-way valve hole; 2422, second valve hole plug. DETAILED DESCRIPTION

[0045] The present invention is further described in detail below in conjunction with the accompanying drawings, and the aforementioned and other purposes, features, aspects and advantages of the present invention will become more obvious, so that those skilled in the art can implement it with reference to the text of the specification. In the accompanying drawings, for the sake of clarity, the shapes and sizes can be enlarged, and the same reference numerals will be used in all figures to indicate the same or similar parts. In the following description, words such as center, thickness, height, length, front, back, rear, left, right, top, bottom, upper, lower, etc. are based on the orientation or position relationship shown in the accompanying drawings. In particular, "height" is equivalent to the size from top to bottom, "width" is equivalent to the size from left to right, and "depth" is equivalent to the size from front to back. These relative terms are for the convenience of explanation and are generally not intended to require specific orientation. Terms related to attachment, connection, etc. (for example, "connection" and "attachment") refer to the relationship between these structures directly or indirectly fixed or attached to each other through intermediate structures, and movable or rigid attachment or relationship, unless otherwise explicitly stated.

[0046] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0047] Example 1

[0048] like Figure 1 , Figure 5As shown, the present invention provides a pumping mechanism for automatically dispensing liquid, comprising a pumping mechanism body 100 disposed in an automatic dispensing feeding box body 200, the pumping mechanism body 100 comprising a piston connecting rod assembly 11, and a driving assembly 12 connected to the piston connecting rod assembly 11, wherein the piston connecting rod assembly 11 is movably disposed in a piston cavity 23 in the automatic dispensing feeding box body 200; wherein,

[0049] The piston-connecting rod assembly 11 and the inner wall of the piston chamber 23 form a sealed pumping chamber 231. The driving assembly 25 drives the piston-connecting rod assembly 24 to reciprocate in the piston chamber 23, changing the spatial size of the pumping chamber 231, and then changing the pressure in the pumping chamber 231, so that the external liquid that is unidirectionally connected to the pumping chamber 231 flows into the pumping chamber 231 or the liquid in the pumping chamber 231 flows out, thereby realizing the pumping or release of liquid.

[0050] like Figure 1 As shown, the piston connecting rod assembly 11 includes a piston connecting rod 111 and a piston head 112. The piston head 111 fits against the inner wall of the piston cavity 23 to seal the pumping cavity 231. The sealed space formed by the piston head 111 and the inner wall of the piston cavity 23 is the pumping cavity 231. One end of the piston connecting rod 112 is connected to the piston head 111, and the other end is connected to the driving assembly 12. The driving assembly 12 drives the piston connecting rod 112 and the piston head 111 to reciprocate in the piston cavity 23, thereby changing the space size of the pumping cavity 231.

[0051] The driving assembly 12 includes a motor (not shown in the figure), a rotating member 121, and a protruding rod 122. The protruding rod 122 is eccentrically arranged on one side of a surface of the rotating member 121, and the rotating member 121 is connected to the motor on the other side of the protruding rod 122. A long hole 111a is arranged at one end of the piston connecting rod 111. Further, the long hole 111a is located at the middle position of one end of the piston connecting rod 111. One end of the protruding rod 122 is movably arranged in the long hole 111a, and the rotating member 121 can move along the inner contour of the long hole 111a. The motor drives the rotating member 121 to move, so that the protruding rod 122 reciprocates in the long hole 111a, so as to guide the piston connecting rod assembly 11 to reciprocate in the piston cavity 23. Further, when the protruding rod 122 is located at the position closest to the piston connecting rod 111 on the rotating member 121, it is the initial position of the movement of the piston connecting rod assembly 11. At this time, the space of the pumping cavity 231 is the smallest. In this embodiment, through the motor, the rotating member 121, the protruding rod 122 eccentrically arranged on one surface of the rotating member, and the long hole 111a arranged on the piston connecting rod 111, the protruding rod 122 reciprocates in the long hole 111a as the rotating member 121 rotates, so that the piston connecting rod assembly 11 reciprocates in the piston cavity 23, and the connection between the piston connecting rod 111 and the driving assembly 12 is always in an active state, so that the piston connecting rod assembly 11 only has a linear motion along the central axis direction of the piston cavity 23, and does not have motion in other directions, so there is no need to design more complex structures to accommodate the movement footprint of the piston connecting rod assembly 11 in other directions. In addition, in this embodiment, the rotating member 121 is used to assist the protruding rod 122 in circular motion. The rotating member 121 can be of any shape and structure, as long as the protruding rod 122 is eccentrically arranged on the rotating member 121 and can perform circular motion as the rotating member 121 rotates. The protruding rod 122 may also be of any structure, and it only needs to be able to cooperate with the long hole 111a to guide the piston connecting rod assembly 11. The structure is simple, easy to control, and occupies little space.

[0052] The rotating member 121 and the protruding rod 122 are both cylindrical. The motor rotates unidirectionally to drive the rotating member 121 to rotate. The protruding rod 122 is eccentrically arranged on the rotating member 121 so that the protruding rod 122 performs circular motion as the rotating member 121 rotates. Since the position of the rotating member 121 is fixed, when the protruding rod 122 needs to perform circular motion, the piston connecting rod 111 has a certain restraining force on the rotating member 121. In order for the protruding rod 122 to perform circular motion smoothly, the piston connecting rod 111 will reciprocate in the long hole 111a along the protruding rod 122 and reciprocate in the piston chamber 23.

[0053] Furthermore, the cross section of the long hole 111a is a rounded rectangle with unequal adjacent sides. The length direction of the long hole 111a is perpendicular to the reciprocating direction of the piston-connecting rod assembly 11, the width of the long hole 111a is slightly larger than the outer diameter of the protruding rod 123, and the length of the long hole 111a is greater than or equal to the diameter of the circle where the circular motion path of the protruding rod 122 is located, so that the long hole 111a always covers the circular motion footprint of the protruding rod 122 during the reciprocating motion of the piston-connecting rod assembly 11, so that the driving assembly 12 only applies the force along the axial direction of the piston cavity 23 to the piston-connecting rod assembly 11, so as to avoid the force pointing to the circumferential direction of the inner wall of the piston cavity 23, which increases the friction between the piston-connecting rod assembly 11 and the inner wall of the piston cavity 23 during the reciprocating motion in the piston cavity 23, resulting in difficulty or failure of the reciprocating motion of the piston-connecting rod assembly 11.

[0054] In one embodiment, if Figure 1 As shown, the long hole 111a is an elongated through hole, and one end of the protruding rod 122 passes through the long hole 111a and can reciprocate along the inner contour direction of the long hole 111a.

[0055] In one embodiment, the long hole 111 a is an elongated blind hole, and one end of the protruding rod 122 is located in the long hole 111 a and can reciprocate along the inner contour direction of the long hole 111 a.

[0056] During the reciprocating motion of the piston connecting rod assembly 11 in the piston chamber 23, in order to always cover the circular motion footprint of the protruding rod 122, the length direction of the long hole 111a is perpendicular to the reciprocating motion direction of the piston connecting rod assembly 11, and the required length of the long hole 111a is the minimum.

[0057] At least one piston rubber ring 113 for sealing is provided around the piston head 112 to form a sealed pumping chamber 231. Furthermore, there are three piston rubber rings 113, and the arrangement of three piston rubber rings 113 improves the sealing performance while avoiding the occurrence of a situation in which the sealing performance is reduced due to damage to a piston rubber ring 113.

[0058] It should be understood that Figure 1 Although the driving assembly 12 shown is not marked with a motor, in one embodiment, the rotating member 121 can be directly configured as a motor, that is, the protruding rod 122 is configured as an output shaft directly eccentrically disposed on the surface of the motor. In another embodiment, the rotating member 121 is a thin plate structure, and the rotating member 121 is directly disposed on a surface of the motor, or other connection structures are disposed between the rotating member 121 and the motor. Therefore, for those skilled in the art, without departing from the principle of the present invention, several improvements or technical feature substitutions can be made to the driving assembly 12, and these improvements or technical feature substitutions are considered to be within the scope of protection of the present invention.

[0059] In one embodiment, the drive assembly 12 includes a linear motor connected to the other end of the piston connecting rod 111 relative to the piston head 112 ; the linear motor directly drives the piston connecting rod 111 and the piston head 112 to reciprocate in the piston chamber 23 .

[0060] The pumping mechanism body 100 provided in this embodiment accurately controls the reciprocating motion distance of the piston connecting rod assembly 11 in the pumping chamber 231 through the motor, the rotating part, and the convex rod, which is easy to control and has an accurate delivery amount. No gear transmission is required, which reduces the transmission components, avoids the disadvantage of inaccurate gear transmission control, and facilitates the control of the transmission distance. In addition, when a part of the pumping mechanism body 100 is damaged and needs to be repaired, it is only necessary to remove the part separately for repair or replacement, avoiding the need to replace the entire set of parts for the repair of the gear transmission assembly, reducing the maintenance cost, simplifying the maintenance process, and eliminating the need for gear meshing debugging.

[0061] Example 2

[0062] like Figure 2 As shown, the motor drives the convex rod 122 to reciprocate along the arc path, the length direction of the long hole 111a is perpendicular to the reciprocating direction of the piston connecting rod assembly 11, and the length of the long hole 111a is less than the radius of the circle where the arc path of the convex rod 122 is located, that is, the central angle corresponding to the one-way arc path of the convex rod 122 is less than 180°. Further, the arc path of the convex rod 122 is located on one side of the rotating member 121, so that the piston connecting rod 111 drives the piston head 112 to move to the maximum distance in the pumping chamber 231 along with the arc movement of the convex rod 122. The convex rod 122 is located at one end of the long hole 111a, and the convex rod 122 is located at the end of the arc path closest to the piston connecting rod 111, and the piston connecting rod assembly 11 is in the initial position at this time. When the motor rotates forward, the convex rod 122 moves from one end of the inner wall of the long hole 111a to the other end, which is a one-way movement; when the motor rotates reversely, the convex rod 122 moves back along the inner wall of the long hole 111a. The motor controls the reciprocating motion of the convex rod 122 along the arc-shaped motion path by forward and reverse rotation of the motor, and the length of the long hole 111a is less than the radius of the circle where the arc-shaped motion path of the convex rod 122 is located, so that the arc-shaped path of the convex rod 122 is only located on one side of the rotating member 121. When the rotating member 121 rotates, the convex rod 122 will only encounter one inflection point in the one-way motion, which reduces the pausing of the motion of the convex rod 122 due to the limitation of the long hole 111a and the change of the direction of the force at the inflection point when the convex rod 122 encounters the inflection point, which is more conducive to the coordinated motion of the rotating member 121, the convex rod 122, and the piston connecting rod assembly 11. Other technical solutions are the same as those in Example 1 and will not be repeated here.

[0063] Example 3

[0064] like Figures 3 to 7As shown, the present invention provides a single-chamber piston type automatic liquid feeding box, including an automatic feeding box body 200, the automatic feeding box body 200 includes a shell 21, a liquid storage chamber 22 and a piston chamber 23 arranged in the shell 21, and the pumping mechanism body 100 as described above, the piston connecting rod assembly 11 and the inner wall of the piston chamber 23 form a sealed pumping chamber 231, and the liquid storage chamber 22 is in one-way communication with the pumping chamber 231; wherein,

[0065] The pumping mechanism body 100 changes the pressure in the pumping chamber 231 so that the liquid in the liquid storage chamber 22 flows into the pumping chamber 231 or the liquid in the pumping chamber 231 flows out, so as to realize automatic liquid delivery.

[0066] like Figure 5 , Figure 6 As shown, a one-way valve 24 is respectively provided at the suction port of the pumping chamber 231 relative to the liquid storage chamber 22 and at the discharge port of the pumping chamber 231. The one-way valve 24 opens or closes with the change of the pressure in the pumping chamber 231. That is, the pressure difference between the pumping chamber 231 and the liquid storage chamber 22 and the pressure difference between the discharge port of the pumping chamber 231 are higher than the set pressure difference of the one-way valve 24, and the liquid in the liquid storage chamber 22 will flow into the pumping chamber 231 or the liquid in the pumping chamber 231 will flow out. When the pressure difference on both sides of the one-way valve 24 is lower than the set pressure difference, the one-way valve is closed and the one-way connection is closed.

[0067] In one embodiment, the one-way valve 24 includes a first one-way valve 241 and a second one-way valve 242. Figure 6 , Figure 7 As shown, the first one-way valve 241 disposed at the suction port of the pumping chamber 23 includes a first one-way valve hole 2411 disposed on the side wall connecting the pumping chamber 231 and the liquid storage chamber 22, and a first valve hole plug 2412 covering one end of the first one-way valve hole 2411 facing the pumping chamber 231, so as to make the pumping chamber 231 and the liquid storage chamber 22 communicate in one direction. The second one-way valve 242 disposed at the discharge port of the pumping chamber 231 includes a second one-way valve hole 2421 disposed in the side wall on one side of the pumping chamber 231, and a second valve hole plug 2422 covering the outer end of the second one-way valve hole 2421. When the piston-connecting rod assembly 24 moves to reduce the pressure in the pumping chamber 231, the first valve hole plug 2412 is elastically deformed and opened, and the liquid in the liquid storage chamber 22 enters the pumping chamber 231 through the first one-way valve 241; when the piston-connecting rod assembly 24 moves to increase the pressure in the pumping chamber 231, the second valve hole plug 2422 is elastically deformed and opened, and the liquid in the pumping chamber 231 flows out through the second one-way valve 242.

[0068] It should be understood that both the first valve plug 2412 and the second valve plug 2422 are soft plugs, which will undergo elastic deformation when the pressure difference on both sides of the plug reaches a certain value.

[0069] In one embodiment, the one-way valve 24 includes a valve body, a valve core and a spring (not shown) disposed inside the valve body. When the pressure difference between the cavities on both sides of the one-way valve 24 reaches a set pressure value, the one-way connection is opened.

[0070] In one embodiment, when the protruding rod 122 of the pumping mechanism body 100 is located in the middle of the long hole 111a of the pumping mechanism body 100 and is closest to the piston chamber 23, the piston head 112 of the pumping mechanism body 100 is located away from the first one-way valve 241 and close to the second one-way valve 242. At this time, the first one-way valve 241 and the second one-way valve 242 are both in a closed state. At this time, the pumping mechanism body 100 is set to be in the initial position of pumping, that is, it is not in a state of pumping in liquid or releasing liquid. Figure 6 This is a schematic diagram of the pumping mechanism body 100 in the initial position of pumping. By controlling the size and matching connection relationship between the rotating member protrusion and the long hole 111a, the size of the piston chamber 23, the initial position of pumping, and the pressure difference set by the first one-way valve 241 and the second one-way valve 242, the distance of a complete one-way movement of the pumping mechanism body 100 can be accurately controlled, so that the amount of liquid drawn into the pumping chamber 231 or the amount of liquid discharged when flowing out can be accurately controlled, so as to achieve accurate automatic liquid delivery.

[0071] The piston chamber 23 is located at the bottom of the liquid storage chamber 22 or close to the bottom of the liquid storage chamber 22, and the first one-way valve 241 is close to the bottom of the liquid storage chamber 22, so that the height difference between the liquid storage chamber 22 and the piston chamber 23 is maximized, thereby maximizing the pressure difference between the pumping chamber 231 on both sides of the first one-way valve 241 and the liquid storage chamber 22.

[0072] The housing 21 is provided with a delivery port 211 for delivering liquid into the liquid storage chamber 22 , so that liquid can be stored in the liquid storage chamber 22 as needed.

[0073] Example 4

[0074] The present invention further provides a washing machine, comprising a washing machine body, and also comprising the automatic feeding box body 200 as described above arranged in the washing machine body, and the extraction mechanism body 100 is fixedly connected to the washing machine body.

[0075] In one embodiment, if Figure 5 , Figure 6 As shown, the draw-out cavity is in one-way communication with the liquid-conducting cavity of the washing machine. Furthermore, the draw-out cavity is in one-way communication with the liquid-conducting cavity of the washing machine via a one-way valve.

[0076] In one embodiment, the pumping chamber 231 is open to the liquid guiding chamber of the washing machine, that is, the pumping chamber 231 is not connected to the liquid guiding chamber of the washing machine. It only requires the discharge port of the pumping chamber 231 to be aligned with the liquid guiding chamber of the washing machine. The liquid in the pumping chamber 231 can be discharged into the liquid guiding chamber of the washing machine through the discharge port under the action of the piston connecting rod assembly 11.

[0077] Among them, the liquid guiding cavity refers to the cavity for directly pouring detergent into the water barrel of the washing machine.

[0078] The housing 21 can be partially ejected or withdrawn relative to the washing machine body so that the delivery port 211 of the housing 21 is partially or completely exposed to the washing machine body, so as to deliver liquid into the liquid storage chamber 22. When the housing 21 is ejected or withdrawn, the draw-out mechanism body 100 is fixed in the washing machine body and does not move with it. At this time, the housing 21 is pulled away from the draw-out mechanism body 100 by a certain distance, that is, the piston head 112 moves in the piston chamber 23, so that the space of the draw-out chamber 231 is increased and the pressure in the draw-out chamber 231 is reduced.

[0079] In one embodiment, the pressure difference on both sides required for opening the first one-way valve 241 is set. When the shell 21 is pulled apart a certain distance and liquid is released from the injection port 211 into the liquid storage chamber 22, the corresponding degree of pressure reduction in the discharge chamber 231 will not cause the first one-way valve 241 to open, and the one-way connection remains in a closed state.

[0080] In one embodiment, the pressure difference between the two sides required for opening the first check valve 241 is set. When the shell 21 is pulled apart a certain distance and liquid is added from the delivery port 211 to the liquid storage chamber 22, the corresponding degree of pressure reduction in the extraction chamber 231 will only cause a certain amount of liquid to enter the extraction chamber 231 from the liquid storage chamber 22 through the first check valve 241. When this fixed amount of liquid has entered, the pressure difference between the two sides of the first check valve 241 does not meet the opening condition of the first check valve 241, and the one-way connection is closed. The amount of liquid entering the extraction chamber 231 will not be too much, and after the shell 21 is retracted into the washing machine body, when the extraction mechanism body 100 moves in the piston chamber 23 to extract, the fixed amount of liquid entering the extraction chamber 231 will remain in the extraction chamber 231 due to the ejection or withdrawal of the shell 21, so that the precise control of the amount of liquid added will not be affected.

[0081] like Figure 3As shown, further, in order to accurately control the distance of the shell 21 being ejected or withdrawn, so as to accurately control the pressure change in the extraction chamber 231, the outer wall of the shell 21 is provided with a limit block 212 for limiting the distance of the shell 21 being ejected or withdrawn relative to the washing machine body. The limit block 212 is convexly arranged on the outer surface of the shell 21. During the process of the shell 21 being ejected or withdrawn, the limit block 212 will not contact the inner wall of the washing machine body. When the limited ejection or withdrawal distance is reached, the limit block 212 contacts the inner wall of the washing machine body, thereby limiting the movement of the shell 21 to continue to eject or withdraw, so that the reciprocating movement of the extraction mechanism body 100 relative to the piston chamber 23 caused by the movement of the part of the shell 21 being exposed on the surface of the washing machine body or retracted into the washing machine body will not cause the inflow or outflow of the liquid in the extraction chamber 231.

[0082] Compared with the prior art, the automatic liquid delivery mechanism provided by the present invention has a simple structure and can be used to accurately control the amount of liquid drawn or delivered, thereby achieving accurate automatic delivery.

[0083] The single-chamber piston type automatic liquid feeding box provided by the present invention can automatically and accurately feed liquid through the cooperation of the pumping structure body, the piston chamber and the one-way valve, and is suitable for single-chamber liquid feeding.

[0084] The washing machine provided by the present invention limits the distance of the shell being ejected or pulled out by the limit block when the shell is ejected or pulled out, and controls the movement of the piston head in the piston cavity when the shell is ejected or pulled out without affecting the subsequent extraction or release operation and the amount of the laundry being put in. When in use, the detergent with high frequency of use can be selected to be put into the liquid storage cavity, while other detergents with low frequency of use, such as softeners, can be directly manually added into the liquid guide cavity of the washing machine, and will not cause too much trouble for the user's manual labor.

[0085] The above are only preferred embodiments of the present invention and are not intended to limit the present invention in any form. Any ordinary technician in the industry can smoothly implement the present invention as shown in the drawings and above. However, any equivalent changes, modifications and evolutions made by technicians familiar with the profession without departing from the scope of the technical solution of the present invention using the technical content disclosed above are all equivalent embodiments of the present invention. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the technical solution of the present invention.

Claims

1. A single-chamber piston-type automatic liquid feeding box, comprising an automatic feeding box body (200), characterized in that: The automatic feeding box body (200) comprises a shell (21), a liquid storage chamber (22) and a piston chamber (23) arranged in the shell (21), and a pumping mechanism for automatically feeding liquid, wherein the pumping mechanism for automatically feeding liquid comprises a pumping mechanism body (100) arranged in the automatic feeding box body (200), the pumping mechanism body (100) comprises a piston connecting rod assembly (11), and a driving assembly (12) connected to the piston connecting rod assembly (11), wherein the piston connecting rod assembly (11) is movably arranged in the piston chamber (23) in the automatic feeding box body (200); wherein: The piston-connecting rod assembly (11) and the inner wall of the piston chamber (23) form a sealed pumping chamber (231); the driving assembly (12) drives the piston-connecting rod assembly (11) to reciprocate in the piston chamber (23), thereby changing the pressure in the pumping chamber (231), so that liquid in a liquid storage chamber (22) that is in one-way communication with the pumping chamber (231) flows into the pumping chamber (231) or liquid in the pumping chamber (231) flows out, thereby achieving pumping or releasing of liquid; The liquid storage chamber (22) is in one-way communication with the extraction chamber (231); The piston connecting rod assembly (11) comprises a piston connecting rod (111) and a piston head (112); the driving assembly (12) comprises a motor, a rotating member (121), and a protruding rod (122); the protruding rod (122) is eccentrically arranged on one side of a surface of the rotating member (121); the rotating member (121) is connected to the motor relative to the other side of the protruding rod (122); one end of the piston connecting rod (111) is provided with a long hole (111a); the protruding rod (122) is The end is movably arranged in the long hole (111a); wherein the motor drives the rotating member (121) to rotate, so that the protruding rod (122) reciprocates in the long hole (111a), thereby guiding the piston connecting rod assembly (11) to reciprocate in the piston chamber (23); when the protruding rod (122) is located at the position closest to the piston connecting rod (111) on the rotating member (121), it is the initial position of the movement of the piston connecting rod assembly (11), and at this time, the space of the extraction chamber (231) is the smallest; A one-way valve (24) is provided at the suction port of the pumping chamber (231) relative to the liquid storage chamber (22) and at the discharge port of the pumping chamber (231), respectively, and the one-way valve (24) opens or closes as the pressure in the pumping chamber (231) changes; The one-way valve (24) comprises a first one-way valve (241) and a second one-way valve (242); The protruding rod (122) of the pumping mechanism body (100) is located in the middle of the long hole (111a) of the pumping mechanism body (100) and is closest to the piston chamber (23); the piston head (112) of the pumping mechanism body (100) is located away from the first one-way valve (241) and close to the second one-way valve (242); at this time, the first one-way valve (241) and the second one-way valve (242) are both in a closed state.

2. The single-chamber piston type automatic liquid feeding box according to claim 1 is characterized in that: The piston head (112) fits against the inner wall of the piston chamber (23) so that the pumping chamber (231) is sealed; one end of the piston connecting rod (111) is connected to the piston head (112), and the other end is connected to the driving assembly (12).

3. The single-chamber piston type automatic liquid feeding box according to claim 1 is characterized in that: The length direction of the long hole (111a) is perpendicular to the reciprocating motion direction of the piston connecting rod assembly (11).

4. The single-chamber piston type automatic liquid feeding box according to claim 3 is characterized in that: The rotating member (121) and the protruding rod (122) are both cylindrical, the motor drives the protruding rod (122) to perform circular motion, and the length of the long hole (111a) is greater than or equal to the diameter of the circle on which the circular motion path of the protruding rod (122) lies.

5. The single-chamber piston type automatic liquid feeding box according to claim 3 is characterized in that: The motor drives the convex rod (122) to reciprocate along an arc path, and the length of the long hole (111a) is smaller than the radius of the circle on which the arc path of the convex rod (122) lies.

6. The single-chamber piston type automatic liquid feeding box according to any one of claims 1 to 4, characterized in that: At least one circle of piston rubber ring (113) for sealing is provided on the circumference of the piston head (112).

7. A single-chamber piston-type automatic liquid feeding box according to claim 1, characterized in that: The first one-way valve (241) provided at the suction port of the pumping chamber (231) comprises a first one-way valve hole (2411) provided on a side wall connecting the pumping chamber (231) and the liquid storage chamber (22), and a first valve hole plug (2412) covering one end of the first one-way valve hole (2411) facing the pumping chamber (231), so as to enable one-way communication between the pumping chamber (231) and the liquid storage chamber (22); the second one-way valve (242) provided at the discharge port of the pumping chamber (231) comprises a second one-way valve hole (2421) provided on a side wall of one side of the pumping chamber (231), and a second valve hole plug (2422) covering the outer end of the second one-way valve hole (2421); wherein: The movement of the piston-connecting rod assembly (11) causes the pressure in the pumping chamber (231) to change, causing the first valve hole plug (2412) or the second valve hole plug (2422) to elastically deform and open, thereby opening the first one-way valve (241) or the second one-way valve (242).

8. A single-chamber piston-type automatic liquid feeding box according to claim 7, characterized in that: The piston chamber (23) is located at the bottom of the liquid storage chamber (22) or close to the bottom of the liquid storage chamber (22).

9. A single-chamber piston-type automatic liquid feeding box according to claim 7, characterized in that: The first one-way valve (241) is close to the bottom of the liquid storage chamber (22).

10. A single-chamber piston-type automatic liquid feeding box according to claim 7, characterized in that: The housing (21) is provided with a delivery port (211) for delivering liquid into the liquid storage cavity (22).

11. A washing machine, comprising a washing machine body, characterized in that: It also comprises a single-chamber piston type automatic liquid feeding box as claimed in any one of claims 1 to 10, which is arranged in the washing machine body, and the extraction mechanism body (100) is fixedly connected to the washing machine body.

12. The washing machine according to claim 11, characterized in that: The discharge port of the extraction cavity (231) is in one-way communication with the liquid guide cavity of the washing machine.

13. The washing machine according to claim 11, characterized in that: The extraction and discharge chamber (231) is arranged separately from the liquid guide chamber of the washing machine, and the discharge port of the extraction and discharge chamber (231) is aligned with the liquid guide chamber of the washing machine.

14. The washing machine according to claim 11, characterized in that: The shell (21) can be partially ejected or pulled out relative to the washing machine body, so that the delivery port (211) of the shell (21) is partially or completely exposed to the washing machine body.

15. A washing machine according to claim 14, characterized in that: The outer wall of the shell (21) is provided with a limit block (212) for limiting the distance that the shell (21) is ejected or drawn out relative to the main body of the washing machine.

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