Spray structure for cleaning machine and cleaning machine

Abstract

The present invention relates to a spray structure for a cleaning machine and a cleaning machine, wherein the spray structure comprises a water inlet seat; a movable arm, on which a stopper is provided; a first stopper, which can move relative to the water inlet seat along the length direction of the movable arm, and the first stopper is provided with a first stopper; a first elastic member enables the first stopper to always maintain a tendency to move along the first direction; a second stopper, which can move relative to the water inlet seat along the length direction of the movable arm, and the second stopper is provided with a second stopper, and along the water flow direction, the second stopper is located upstream of the first stopper, and the stopper can slide between the first stopper and the second stopper and abut against one of the first stopper and the second stopper; and the second elastic member enables the second stopper to always maintain a tendency to move along the second direction. The stopper of the movable arm can always abut against one of the first stopper and the second stopper, so that when the movable arm moves relative to the water inlet seat, water flow will not leak.

Description

Technical Field

[0001] The present invention relates to the technical field of cleaning machines, and in particular to a spray structure for cleaning machines and the cleaning machine. Background Art

[0002] The sprayers of existing dishwashers generally adopt a linear or star-shaped structure, and wash by rotating around an intermediate axis. This type of sprayer adopts a cavity structure, and a water outlet is opened on the cavity wall. After the sprayer is connected to the water circuit, it can spray water to wash under the action of water pressure, and the spray water flow can also drive the sprayer to rotate.

[0003] When washing, the spray arm of the above-mentioned sprayer mainly moves in a circular motion around the middle axis, so that the washing area is circular. Taking into account factors such as the placement stability and capacity of the dishwasher, the space of the inner cavity (that is, the inner cavity of the dishwasher body) is mostly a cube. This causes the existing sprayer structure to form dead corners in the four corners of the inner cavity during washing, and the dishes cannot be fully washed.

[0004] In response to the above problems, the Chinese invention patent application with patent number CN201811487147.2 (publication number CN111281302A) discloses "A dishwasher spray device and dishwasher", in which the spray device includes: a rotating part, which rotates with a straight line perpendicular to its length direction as an axis; a sliding part, which is arranged at at least one end of the rotating part and can be slidably arranged along the length direction of the rotating part; a plurality of nozzles are arranged on the surface of the rotating part and the sliding part; and an elastic member connecting the sliding part and the rotating part, and the sliding part is subject to different sizes of spray water pressure under the constraint of the elastic member, so that the sliding distance of the sliding part in the length direction of the rotating part is controllable. The spray device adopts a retractable design. During the washing process, the length of the spray device can be adjusted according to the shape of the inner tank cavity, thereby adjusting the position of the nozzle, so that the spray arm further covers the peripheral area on the basis of the original washing area, thereby effectively solving the problem of washing dead corners, and is suitable for promotion and use.

[0005] This patent sets a first limiting part at both ends of the rotating part to stop the sliding part, and a second limiting part is set in the length direction away from the two ends of the rotating part (the first limiting part and the second limiting part are equivalent to the two limiting parts below), and a retaining ring (equivalent to the blocking part of the moving arm below) is set on the outer periphery of the sliding part. The retaining ring is limited between the first limiting part and the second limiting part to limit the sliding distance of the sliding part.

[0006] Because the sliding part moves under the action of the spray water pressure, it is very likely that the sliding part's snap ring will be located between the first limit part and the second limit part, and will not block any of the first limit part and the second limit part. The sliding part can slide along the rotating part, so the sliding part and the rotating part must not be tightly matched. When the snap ring is located between the first limit part and the second limit part, it is very easy for water to leak between the sliding part (i.e., the moving arm below) and the rotating part (i.e., the water inlet seat below). Summary of the invention

[0007] The first technical problem to be solved by the present invention is to provide a spray structure for a cleaning machine with good sealing performance between a moving arm and a water inlet seat in view of the current status of the prior art.

[0008] The second technical problem to be solved by the present invention is to provide a spray structure for a cleaning machine with an extended length in view of the current status of the prior art.

[0009] The third technical problem to be solved by the present invention is to provide a cleaning machine with a large cleaning range and the above-mentioned spray structure in view of the current status of the prior art.

[0010] The technical solution adopted by the present invention to solve the first and second technical problems is: a spray structure for a cleaning machine, comprising:

[0011] A water inlet seat, the interior of which is hollow to form a flow channel, and the water inlet seat is provided with a water inlet in fluid communication with the flow channel;

[0012] The movable arm is strip-shaped, one end of the movable arm is connected to the water inlet seat, and the other end extends in a direction away from the water inlet seat. The movable arm is hollow inside to form a channel in fluid communication with the flow channel. The movable arm is provided with a spray hole in fluid communication with the channel. The movable arm can move in a first direction toward the water inlet seat or in a second direction away from the water inlet seat under the action of water pressure, and a stopper is provided on the movable arm;

[0013] It is characterized by that it also includes

[0014] A first position-limiting member is movably mounted on the water inlet seat, and the first position-limiting member can move relative to the water inlet seat along the length direction of the movable arm, and a first position-limiting portion is provided on the first position-limiting member;

[0015] A first elastic member, acting on the first limiting member, so that the first limiting member always maintains a tendency to move along the first direction;

[0016] A second limiting member is movably mounted on the water inlet seat, and the second limiting member can move relative to the water inlet seat along the length direction of the movable arm, and the second limiting member is provided with a second limiting portion, and along the water flow direction, the second limiting portion is located upstream of the first limiting portion, and the blocking portion can slide between the first limiting portion and the second limiting portion and abut against one of the first limiting portion and the second limiting portion;

[0017] The second elastic member acts on the second limiting member to ensure that the second limiting member always maintains a tendency to move along the second direction.

[0018] In order to further extend the maximum length of the spray structure, the first limiter is in the shape of a tube with open ends. The first end of the first limiter can be inserted in the flow channel of the water inlet seat along its axial movement, and the second end of the first limiter can be inserted in the channel of the movable arm along its axial movement. The first limiter is arranged on the outer peripheral wall of the first limiter and is arranged adjacent to the second end of the first limiter. The first limiter is in the shape of a tube, which can not only connect the water inlet seat and the movable arm, but also the two ends of the first limiter are inserted with the water inlet seat and the movable arm respectively, which is equivalent to the water inlet seat and the movable arm not being directly connected. Under the action of water pressure, the movable arm and the first limiter can move in the second direction, so that the overall length of the spray structure is longer (compared to the first limiter in other structural forms, such as strip-shaped, the structural form of insertion and matching between the water inlet seat and the movable arm).

[0019] In the above scheme, in order to facilitate the insertion of the second end of the first stopper into the channel of the movable arm, the first stopper is squeezed to be elastically deformed, and the outer wall surface of the first stopper is a first conical surface that gradually decreases in diameter along the direction in which the first stopper is inserted into the channel. During the process of inserting the first stopper into the channel, the first stopper is squeezed and deformed by the stopper to allow the first stopper to pass over the stopper, and after the first stopper passes over the stopper, it returns to its original shape and can abut against the stopper.

[0020] In order to guide the moving trajectory of the first limit member, the water inlet seat includes a seat body and a guide tube with one end arranged on the seat body, the other end of the guide tube extends in a direction away from the seat body, the seat body and the guide tube are both hollow inside and connected to form the flow channel, the first limit member is inserted in the guide tube and can move axially along the guide tube, and the guide tube serves to guide the moving trajectory of the first limit member.

[0021] In order to prevent the first stopper from being separated from the guide tube, a first stopper structure for limiting the moving stroke of the first stopper is provided between the first stopper and the guide tube, the first stopper structure includes a first slide groove and a first slider that can move in the first slide groove, the first slider can be elastically deformed, the first slide groove is provided on one of the outer peripheral wall of the first stopper and the inner wall surface of the guide tube, the first slider is provided on the other of the outer peripheral wall of the first stopper and the inner wall surface of the guide tube, the two ends of the first slide groove are closed and extend along the length direction of the moving arm. When the first slider abuts against the end of the first slide groove, the first stopper moves to the limit position and cannot continue to move, but can only move in the opposite direction.

[0022] In order to prevent the first slider from interfering with the wall surface of the guide tube, so that the first stopper cannot be inserted into the guide tube, the first slider is arranged on the first stopper, and the outer wall surface of the first slider is a second inclined surface inclined toward the center line of the first stopper along the direction in which the first stopper is inserted into the guide tube. During the process of inserting the first stopper into the guide tube, the first slider is squeezed and deformed by the inner wall surface of the guide tube until the first slider moves to the first slide groove, and the first slider returns to its original state and is embedded in the first slide groove.

[0023] The second position-limiting member can have a variety of structural forms, such as a strip-shaped member, one end of which is mounted on the water inlet seat, and the other end is provided with a second position-limiting portion. Preferably, the second position-limiting member is also in a tubular shape, and the first end of the second position-limiting member can be movably sleeved on the guide tube. This structure of the second position-limiting member is not only convenient for realizing its coordination with the water inlet seat and the movable arm, but also because the second position-limiting member is sleeved on the guide tube, the guide tube is equivalent to playing a role in positioning and guiding the second position-limiting member, without the need to set up a member for positioning and guiding the second position-limiting member.

[0024] In order to prevent the second stopper from being separated from the guide tube, a second slide groove is provided on the outer wall surface of the guide tube, and a second slider that can move along the second slide groove is provided on the inner peripheral wall of the second stopper, and both ends of the second slide groove are closed and extend along the length direction of the movable arm. When the second slider abuts against the end of the second slide groove, the second stopper moves to the limit position and cannot move further, but can only move in the opposite direction.

[0025] In order to prevent the second slider from interfering with the outer wall of the guide tube, so that the second stopper cannot be mounted on the guide tube, the second slider can be elastically deformed, and the outer wall of the second slider is a third inclined surface that is inclined away from the center line of the second stopper along the direction in which the second stopper is mounted on the guide tube. In the process of the second stopper being mounted on the guide tube, the second slider is squeezed and deformed by the outer wall of the guide tube until the second slider moves to the second slide groove, and the second slider returns to its original state and is embedded in the second slide groove.

[0026] In order to improve the sealing performance between the first limiting portion and the blocking portion, further, a first sealing ring is provided on the end surface of the first limiting portion facing the blocking portion.

[0027] In order to improve the sealing performance between the second limiting portion and the blocking portion, further, a second sealing ring is provided on the end surface of the second limiting portion facing the blocking portion.

[0028] In order to further improve the spraying range of the spray structure, there are two movable arms and they are symmetrically arranged on the water inlet seat, so that the two movable arms can move relative to the water inlet seat, further extending the overall length of the spray structure.

[0029] The spray structure also includes

[0030] A guide column, provided on the movable arm, the guide column extending along the rotation axis of the water inlet seat;

[0031] A guide rail is provided with a guide groove in the shape of an annular shape in which a guide column can slide, and the guide groove partially protrudes in a direction away from its center line to form an outer protrusion. The guide column on the movable arm slides along the guide groove of the guide rail, so that the guide rail guides and limits the rotation trajectory of the spray structure, thereby limiting the movement distance of the movable arm, that is, limiting the overall length of the spray structure; when the guide column moves to the outer protrusion of the guide rail, the length of the spray structure is the longest, and because of the limitation of the guide groove, the length of the spray structure can be prevented from being too long and interfering with the side wall of the inner cavity of the cleaning machine; but when the guide column is not at the outer protrusion, the length of the spray structure is shorter, but it will not be too short to cause the spray range to be insufficient; when the spray structure is applied to the cleaning machine, the outer protrusion faces the four corners of the inner cavity of the cleaning machine, so that when the spray structure rotates to face the corner of the inner cavity, the length of the spray structure is the longest, and the corner of the inner cavity can be cleaned.

[0032] The inner cavity of the cleaning machine is generally in the shape of a cube with four corners. Based on the principle that the diagonal is the longest, the spray arm can be longest when it faces the corner of the inner cavity. In order to adapt to the inner cavity structure of the cleaning machine, there are four external protrusions.

[0033] The guide rail can be an annular entity, and then the guide groove is opened on it, but this is troublesome to process. The structure is simple. The guide rail includes two annular enclosures arranged inside and outside, and the distance between the two annular enclosures forms the guide groove. In this way, only the two annular enclosures need to be nested, and there is no need to specially open the guide groove.

[0034] The technical solution adopted by the present invention to solve the above-mentioned second technical problem is: a cleaning machine using the above-mentioned spray structure, characterized in that it also includes a box body with an inner cavity, the spray structure is arranged in the inner cavity, and the water inlet seat can rotate relative to the inner cavity.

[0035] Compared with the prior art, the advantages of the present invention are as follows: during the rotation of the water inlet seat of the present invention, the movable arm and the first position-limiting member will move in a direction away from the water inlet seat due to the centrifugal force and water pressure. When the rotation speed of the water inlet seat increases, the movable arm moves away from the water inlet seat, because the first position-limiting member can also move in a direction away from the water inlet seat, but is constrained by the first elastic member. At the same rotation speed of the water inlet seat, the movement stroke of the first position-limiting member is smaller than the movement stroke of the movable arm, so that the blocking portion of the movable arm abuts against and is in close contact with the first position-limiting portion to prevent water leakage;

[0036] When the rotation speed becomes smaller, the movable arm moves toward the direction close to the water inlet seat. Since the second limit member can also move toward the direction close to the water inlet seat, but is constrained by the second elastic member, at the same rotation speed of the water inlet seat, the moving stroke of the second limit member is smaller than the moving stroke of the movable arm, so that the blocking part of the movable arm is against and in close contact with the second limit part to prevent water leakage.

[0037] In summary, the blocking portion of the movable arm can always resist against one of the first limiting portion and the second limiting portion, so that when the movable arm moves relative to the water inlet seat, water flows from the water inlet seat into the movable arm without leakage.

[0038] The spray structure of the present invention includes a water inlet seat and a movable arm, and the movable arm can move relative to the water inlet seat, thereby extending the overall length of the spray structure and increasing the spray range. When the spray structure is used on a cleaning machine, the large spray range reduces cleaning dead angles. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0040] Figure 2 for Figure 1 A cross-sectional view of

[0041] Figure 3 for relative to Figure 2 Reverse section view;

[0042] Figure 4 for Figure 1 Schematic diagram of the decomposition of

[0043] Figure 5 for Figure 2 Schematic diagram of the decomposition of

[0044] Figure 6 for Figure 1 A schematic structural diagram of the second limiting member in FIG.

[0045] Figure 7 for Figure 1 A schematic structural diagram of the first limiting member in FIG.

[0046] Figure 8 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0047] Fig. 9 for Figure 8 Schematic diagram of the decomposition of

[0048] Fig.10 for Figure 8 A schematic diagram of the structure without the storage rack;

[0049] Fig.11 for Figure 8 Schematic diagram of the structure without the spray structure. DETAILED DESCRIPTION

[0050] The present invention is further described in detail below with reference to the accompanying drawings.

[0051] Example 1

[0052] like Figures 1 to 7 As shown, the cleaning machine of this preferred embodiment includes a box body (not shown in the figure) and a spray structure A. The box body has an inner cavity, and the spray structure is rotatably arranged in the inner cavity. The structure for driving the spray structure to rotate can adopt the existing structure for driving the spray arm to rotate.

[0053] The spray structure A includes a water inlet seat 1, a movable arm 2, a first limiter 3, a second limiter 4, a first elastic member 30, a second elastic member 40, etc.

[0054] The water inlet seat 1 can rotate relative to the inner cavity of the box. Figure 2 , 3 As shown, the water inlet seat 1 is hollow inside to form a flow channel 11, and a water inlet 12 is provided on the water inlet seat 1 for fluid communication with the flow channel 11. The water inlet seat 1 may be provided with a water outlet for fluid communication with the flow channel 11, or may not be provided with the water outlet.

[0055] In this embodiment, the water inlet seat 1 includes a seat body 1a and a guide tube 1b with one end arranged on the seat body 1a, and the other end of the guide tube 112 extends in a direction away from the seat body 1a. The seat body 1a and the guide tube 1b are both hollow inside and connected to form a flow channel 11. The internal hollow area in the seat body 1a forms a water collecting chamber 111, and the internal hollow area of ​​the guide tube 1b forms a branch channel 112. The branch channel 112 extends outward from the peripheral wall of the water collecting chamber 111, the water inlet 12 is fluidically connected to the water collecting chamber 111, and the channel 21 of the movable arm 2 is fluidically connected to the branch channel 112 to increase the impact force of the water pressure on the movable arm 2.

[0056] The movable arm 2 is strip-shaped, one end of the movable arm 2 is connected to the water inlet seat 1 through the first stopper 3 and the second stopper 4, and the other end extends in a direction away from the water inlet seat 1. The movable arm 2 is hollow inside to form a channel 21 extending along its length, and the channel 21 is fluidically connected to the flow channel 11. The movable arm 2 is provided with a spray hole 22 in fluid communication with the channel 21. The movable arm 2 can move in a first direction toward the water inlet seat 1 or in a second direction away from the water inlet seat 2 under the action of water pressure.

[0057] like Figure 2 , 4 As shown in Figures 5 and 7, the first position limiting member 3 is in the shape of a tube with open ends, and the first end of the first position limiting member 3 can be inserted into the guide tube 1b and can move axially along the guide tube 1b, and the inner wall surface of the first end of the first position limiting member 3 is in the shape of a cone with a gradually decreasing diameter along the direction of water flow, so that the water can flow smoothly from the flow channel 11 into the channel 21.

[0058] A first sliding block 31 (which may be made of elastic material) that can be elastically deformed is provided on the outer peripheral wall of the first limiting member 3, and a first sliding groove 13 is provided on the inner wall surface of the guide tube 1b. Both ends of the first sliding groove 13 are closed and extend along the length direction of the movable arm 2. The first sliding block 31 can move in the first sliding groove 13. When the first sliding block 31 abuts against the end of the first sliding groove 13, the first limiting member 3 moves to the extreme position and cannot move further but can only move in the opposite direction. The first sliding block 31 and the first sliding groove 13 together constitute a first limiting structure for limiting the moving stroke of the first limiting member 3 to prevent the first limiting member 3 from detaching from the guide tube 1b under the action of water pressure.

[0059] Of course, the first slider 31 can also be set on the guide tube 1b, and the first chute 13 can be set on the first stopper 3. However, since the first slider 31 is easy to interfere during the insertion of the first stopper 3, the design method of this embodiment is the best. The outer wall surface of the first slider 31 is a second inclined surface 311 inclined toward the center line of the first stopper 3 along the direction in which the first stopper 3 is inserted into the guide tube 1b. During the insertion of the first stopper 3 into the guide tube 1b, the first slider 31 is squeezed and deformed by the wall surface of the guide tube 1b until the first slider 31 moves to the first chute 13, and the first slider 31 returns to its original state and is embedded in the first chute 13, so that the first slider 31 can be prevented from interfering with the wall surface of the guide tube 1b, resulting in the first stopper 3 being unable to be inserted into the guide tube 1b.

[0060] The second end of the first stopper 3 is inserted into the channel 21 of the movable arm 2 so as to be movable along the axial direction thereof. Figure 2 , 7As shown, a first limiting portion 32 is provided on the outer wall of the first limiting member 3 at a position adjacent to its second end, and a blocking portion 23 is provided at the water inlet end of the channel 21 of the movable arm 2. The first limiting portion 32 can resist the blocking portion 23, and the blocking portion 23 serves to limit the first limiting member 3 from separating from the channel 21 of the movable arm 2.

[0061] In order to facilitate the insertion of the second end of the first limiting member 3 into the channel 21 of the movable arm 2, the first limiting portion 32 can be elastically deformed (can be made of elastic material), and the outer wall surface of the first limiting portion 32 is a first conical surface 321 that gradually decreases in diameter along the direction in which the first limiting member 3 is inserted into the channel 21. In the process of inserting the first limiting member 3 into the channel 21, the first limiting portion 32 is squeezed and deformed by the stopper 23 to allow the first limiting member 3 to pass over the stopper 23. After the first limiting member 3 passes over the stopper 23, it returns to its original shape and can abut against the stopper 23.

[0062] The first position-limiting member 3 can reciprocate along its axial direction under the action of water pressure. The first elastic member 30 acts on the first position-limiting member 3 to make the first position-limiting member 3 always keep the tendency of moving along the first direction, that is, toward the water inlet seat 1 .

[0063] like Figure 2 , 6 As shown, the second stopper 4 is also tubular and extends along the length direction of the movable arm 2, and the first end of the second stopper 4 is sleeved on the guide tube 1b. A second slide groove 14 is provided on the outer wall surface of the guide tube 1b, and a second slider 41 that can move along the second slide groove 14 is provided on the inner peripheral wall of the second stopper 4. The second slide groove 14 is closed at both ends and extends along the length direction of the movable arm 2. When the second slider 41 abuts against the end of the second slide groove 14, the second stopper 4 moves to the limit position and cannot move further, but can only move in the opposite direction to prevent the second stopper 4 from being separated from the guide tube 1b.

[0064] The second slider 41 is elastically deformable (it can be made of elastic material), and the outer wall of the second slider 41 is a third inclined surface 411 that is inclined away from the center line of the second limiter 4 along the direction in which the second limiter 4 is sleeved on the guide tube 1b. In the process of the second limiter 4 being sleeved on the guide tube 1b, the second slider 41 is squeezed and deformed by the outer wall of the guide tube 1b until the second slider 41 moves to the second slide groove 14, and the second slider 41 returns to its original state and is embedded in the second slide groove 14 to prevent the second slider 41 from interfering with the outer wall of the guide tube 1b, so that the second limiter 4 cannot be sleeved on the guide tube 1b.

[0065] The second end of the second limiting member 4 extends toward the movable arm 2, and the second end of the second limiting member 4 is provided with a second limiting portion 42. Along the water flow direction, the second limiting portion 42 is located upstream of the first limiting portion 32, and the blocking portion 23 can slide between the first limiting portion 32 and the second limiting portion 42 and abut against one of the first limiting portion 32 and the second limiting portion 42.

[0066] The second stopper 4 can move along the length direction of the movable arm 2 under the action of water pressure, and the second elastic member 40 acts on the second stopper 4, so that the second stopper 4 always maintains a tendency to move along the second direction, i.e., in a direction away from the water inlet seat 1. In this embodiment, the first elastic member 30 and the second elastic member 40 are both springs installed on the main body 1, one end of the first elastic member 30 abuts against the baffle 34 on the first stopper 3, and one end of the second elastic member 40 abuts against the second stopper 42.

[0067] The working process of the spray structure of this embodiment is as follows:

[0068] During the rotation of the water inlet seat 1, the movable arm 2 will move away from the water inlet seat 1 due to the centrifugal force and water pressure. When the rotation speed of the water inlet seat 1 increases, the movable arm 2 moves away from the water inlet seat 1, because the first limiter 3 can also move away from the water inlet seat 1, but is constrained by the first elastic member 30. At the same rotation speed of the water inlet seat 1, the movement stroke of the first limiter 3 is smaller than the movement stroke of the movable arm 2, so that the stopper 23 of the movable arm 2 and the first limiter 32 abut and are in close contact to prevent water leakage;

[0069] When the rotation speed becomes smaller, the movable arm 2 moves toward the water inlet seat 1, because the second limit member 4 can also move toward the water inlet seat 1, but is constrained by the second elastic member 40. At the same rotation speed of the water inlet seat 1, the moving stroke of the second limit member 4 is smaller than the moving stroke of the movable arm 2, so that the blocking portion 23 of the movable arm 2 is abutted and in close contact with the second limit portion 42 to prevent water leakage.

[0070] A first embedding groove 320 is provided on the end surface of the first limiting portion 32 facing the stopper 23, and a first sealing ring 33 is provided in the first embedding groove 320; a second embedding groove 420 is provided on the end surface of the second limiting portion 42 facing the stopper 23, and a second sealing ring 43 is provided in the first embedding groove 420 to further prevent water leakage.

[0071] In this embodiment, there are two movable arms 2 and they are symmetrically arranged on the water inlet seat 1. Correspondingly, there are two first limit members 3 and two second limit members 4, so that the two movable arms 2 can move relative to the water inlet seat 1, further extending the overall length of the spray structure; of course, only one movable arm 2 can be set.

[0072] Example 2

[0073] The difference between this embodiment and the embodiment 1 is that a guide rail 5 is further provided in this embodiment.

[0074] like Figures 8 to 11 As shown, in this embodiment, a guide post 24 is provided on the upper end surface of each movable arm 2 adjacent to the other end thereof, and each guide post 24 extends along the rotation axis of the water inlet seat 1 to Figure 2 In the direction of the guide post 24, the guide post 24 extends vertically.

[0075] The guide rail 5 is provided with a ring-shaped guide groove 51 in which the guide column 24 can slide. In this embodiment, the guide rail 5 is located above the spray structure A. The guide rail 5 includes two ring-shaped frames 52 arranged inside and outside. The distance between the two ring-shaped frames 52 forms the ring-shaped guide groove 51 (the ring shape here is not limited to a circle, but can also be a rectangle, a square, and a closed line).

[0076] The guide groove 51 partially protrudes in a direction away from its center line to form an outer protrusion 53. The inner cavity of the cleaning machine is generally in the shape of a cube with four corners. Based on the principle that the diagonal is the longest, the spray structure A can be longest when it faces the corner of the inner cavity. In order to adapt to the inner cavity structure of the cleaning machine, the guide rail 5 has four outer protrusions 53, and the four outer protrusions 53 of the guide rail 5 are respectively arranged at the four corners of the inner cavity of the box. In this embodiment, the guide groove 51 is approximately rectangular, and the four corners of the guide groove 51 are the outer protrusions 53. Because the diagonal of the rectangle is longer than the length of its side edges, the distance between the corner of the rectangle and its center line is farther than the distance between the side edges of the rectangle and its center line.

[0077] A shelf 6 for placing tableware or fruits and vegetables is also provided in the box body. The spray structure A is provided below the shelf 6 , and the spray hole 22 faces the direction where the shelf 6 is located.

[0078] The guide rail 5 is fixedly arranged relative to the storage rack 6. The storage rack 6 is a hollow structure composed of a plurality of frame bars 61. The bottom of the storage rack 6 has a plurality of annular frame bars 61 arranged in sequence along the radial direction. Each enclosure 52 of the guide rail 5 is provided with a plurality of stoppers 54 at intervals along its circumference. The plurality of stoppers 54 on each enclosure 52 abut against the outside or inside of an annular frame bar 61; or some of the stoppers 54 on each enclosure 52 abut against the outside of an annular frame bar 61, and the remaining stoppers 54 abut against the inside of the annular frame bar 61. In this way, with the structure of the storage rack 6, it is only necessary to provide the stoppers 54 on the guide rail 5 to achieve its positioning, and the structure is simple.

[0079] In this embodiment, by providing a guide rail 5, the guide post 24 on the movable arm 2 slides along the guide groove 51 of the guide rail 5, so that the guide rail 5 guides and limits the rotation trajectory of the spray structure, thereby limiting the moving distance of the movable arm 2, that is, limiting the overall length of the spray structure A;

[0080] When the guide post 24 moves to the outer protrusion 53 of the guide rail 5, the length of the spray structure is the longest, and because of the limitation of the guide groove 51, the length of the spray structure can be prevented from being too long and interfering with the side wall of the inner cavity of the cleaning machine. At this time, the outer protrusion 53 faces the four corners of the inner cavity of the cleaning machine, and can clean the corners of the inner cavity; but when the guide post 24 is not at the outer protrusion 53, the length of the spray structure is shorter, but it will not be too short to cause the spray range to be insufficient.

[0081] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Since the embodiments disclosed in the present invention can be arranged in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0082] The "fluid connection" referred to in the present invention refers to the spatial position relationship between two parts or parts (hereinafter collectively referred to as the first part and the second part respectively), that is, the fluid (gas, liquid or a mixture of the two) can flow from the first part along the flow path or / and be transported to the second part. The first part and the second part can be directly connected, or the first part and the second part can be indirectly connected through at least one third party. The third party can be a fluid channel such as a pipe, channel, duct, guide member, hole, groove, etc., or it can be a chamber allowing fluid to flow through, or a combination of the above.

Claims

1. A spray structure for a cleaning machine, comprising: A water inlet seat (1) having a hollow interior to form a flow channel (11), and a water inlet (12) in fluid communication with the flow channel (11) is provided on the water inlet seat (1); The movable arm (2) is strip-shaped, one end of the movable arm (2) is connected to the water inlet seat (1), and the other end extends in a direction away from the water inlet seat (1). The movable arm (2) is hollow inside to form a channel (21) in fluid communication with the flow channel (11). The movable arm (2) is provided with a spray hole (22) in fluid communication with the channel (21). The movable arm (2) can move in a first direction toward the water inlet seat (1) or in a second direction away from the water inlet seat (1) under the action of water pressure, and a stopper (23) is provided on the movable arm (2); It is characterized in that Also includes A first limiting member (3) is movably mounted on the water inlet seat (1), and the first limiting member (3) can move relative to the water inlet seat (1) along the length direction of the movable arm (2), and a first limiting portion (32) is provided on the first limiting member (3); A first elastic member (30) acts on the first limiting member (3) so that the first limiting member (3) always maintains a tendency to move along the first direction; A second limiting member (4) is movably mounted on the water inlet seat (1), and the second limiting member (4) can move relative to the water inlet seat (1) along the length direction of the movable arm (2); a second limiting portion (42) is provided on the second limiting member (4); along the water flow direction, the second limiting portion (42) is located upstream of the first limiting portion (32); the blocking portion (23) can slide between the first limiting portion (32) and the second limiting portion (42) and abut against one of the first limiting portion (32) and the second limiting portion (42); The second elastic member (40) acts on the second limiting member (4) so ​​that the second limiting member (4) always maintains a tendency to move along the second direction.

2. The spray structure according to claim 1, characterized in that: The first limiting member (3) is in the shape of a tube with both ends open. The first end of the first limiting member (3) can be inserted into the flow channel (11) of the water inlet seat (1) so as to be movably installed along its axial direction. The second end of the first limiting member (3) can be inserted into the channel (21) of the movable arm (2) so as to be movably installed along its axial direction. The first limiting portion (32) is arranged on the outer peripheral wall of the first limiting member (3) and is arranged adjacent to the second end of the first limiting member (3).

3. The spray structure according to claim 2, characterized in that: The first limiting portion (32) is elastically deformable, and an outer wall surface of the first limiting portion (32) is a first conical surface (321) that gradually decreases in diameter along a direction in which the first limiting member (3) is inserted into the channel (21).

4. The spray structure according to claim 2, characterized in that: The water inlet seat (1) comprises a seat body (1a) and a guide tube (1b) with one end arranged on the seat body (1a); the other end of the guide tube (1b) extends in a direction away from the seat body (1a); the seat body (1a) and the guide tube (1b) are both hollow inside and are connected to form the flow channel (11); the first stopper (3) is inserted into the guide tube (1b) and can move axially along the guide tube (1b).

5. The spray structure according to claim 4, characterized in that: A first limiting structure for limiting the moving stroke of the first limiting member (3) is provided between the first limiting member (3) and the guide tube (1b), the first limiting structure comprising a first slide groove (13) and a first slider (31) movable in the first slide groove (13), the first slider (31) being elastically deformable, the first slide groove (13) being provided on one of the outer peripheral wall of the first limiting member (3) and the inner wall surface of the guide tube (1b), the first slider (31) being provided on the other of the outer peripheral wall of the first limiting member (3) and the inner wall surface of the guide tube (1b), the first slide groove (13) being closed at both ends and extending along the length direction of the movable arm (2).

6. The spray structure according to claim 5, characterized in that: The first sliding block (31) is arranged on the first limiting member (3), and the outer wall surface of the first sliding block (31) presents a second inclined surface (311) which is inclined toward the center line of the first limiting member (3) along the direction in which the first limiting member (3) is inserted into the guide tube (1b).

7. The spray structure according to claim 4, characterized in that: The second limiting member (4) is also tubular, and the first end of the second limiting member (4) is movably sleeved on the guide tube (1b).

8. The spray structure according to claim 7, characterized in that: A second slide groove (14) is provided on the outer wall surface of the guide tube (1b); a second slider (41) capable of moving along the second slide groove (14) is provided on the inner wall of the second limiting member (4); the second slider (41) is capable of elastic deformation; and both ends of the second slide groove (14) are closed and extend along the length direction of the movable arm (2).

9. The spray structure according to claim 8, characterized in that: The outer wall surface of the second sliding block (41) is a third inclined surface (411) which is inclined in a direction in which the second limiting member (4) is sleeved on the guide tube (1b) and is away from the center line of the second limiting member (4).

10. The spray structure according to any one of claims 1 to 9, characterized in that: A first sealing ring (33) is provided on the end surface of the first limiting portion (32) facing the blocking portion (23); and a second sealing ring (43) is provided on the end surface of the second limiting portion (42) facing the blocking portion (23).

11. The spray structure according to any one of claims 1 to 9, characterized in that: There are two movable arms (2) which are symmetrically arranged on the water inlet seat (1); correspondingly, there are two first limiting members (3) and two second limiting members (4).

12. The spray structure according to any one of claims 1 to 9, characterized in that: The flow channel (11) comprises an annular water collecting chamber (111) and a branch flow channel (112) extending outward from the peripheral wall of the water collecting chamber (111); the water inlet (12) is fluidically connected to the water collecting chamber (111); and the channel (21) of the movable arm (2) is fluidically connected to the branch flow channel (112).

13. A cleaning machine using the spray structure according to any one of claims 1 to 11, characterized in that: It also comprises a box body having an inner cavity, the spray structure is arranged in the inner cavity, and the water inlet seat (1) can rotate relative to the inner cavity.

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