A 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 joint, which is arranged vertically, the interior of the joint is hollow, and the joint is provided with an opening in fluid communication with the interior thereof; an ejector, which is inserted into the joint and can move up and down along the joint, and the ejector comprises a sliding tube, the top of the sliding tube is closed and the bottom is open, and the sliding tube is provided with an inlet in communication with the above opening; a spray arm, which is arranged vertically, the interior of the spray arm is hollow, the upper part of the spray arm is inserted and matched with the lower part of the sliding tube and the two are fixed in the axial direction of the spray arm, and the side wall of the spray arm is provided with a spray hole in fluid communication with the interior thereof. The ejector as a whole can move relative to the joint, and the cleaning or drying effect is good.

Description

Technical Field

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

[0002] In people's daily life, washing dishes such as bowls, plates, and basins has become an indispensable thing in life. In order to reduce people's housework and tedious labor, humans have developed various tableware washing machines, among which the most important one is the spray dishwasher, and the water spray device is the most important component of the spray dishwasher. The water spray device of the spray dishwasher currently on the market is a rotary arm water spray device, which is composed of an electric pump, a flat cross-tube arm water sprayer, a water pipe shaft with a drain hole, a water sprayer top cap, a sealing gasket and a movable shaft sleeve. A flat cross-tube arm water sprayer with water spray holes inclined in different directions is provided, which is installed on the water pipe shaft with a drain hole. The torque generated by the reaction force of the sprayed water flow during operation drives the cross-tube arm water sprayer to rotate rapidly around the water pipe shaft, thereby spraying a three-dimensional rotating jet to the tableware. As shown in the Chinese utility model patent "A dishwasher spray device and a dishwasher" disclosed with patent number CN201811487147.2 (publication number CN111281302A), it includes: a rotating part, which rotates with a straight line perpendicular to its length direction as an axis; a sliding part, which is provided at at least one end of the rotating part and can be slid along the length direction of the rotating part; a plurality of nozzles are provided on the surfaces of the rotating part and the sliding part; and an elastic part connecting the sliding part and the rotating part. The sliding part is subjected to spray water pressures of different sizes under the constraint of the elastic part, so that the sliding distance of the sliding part in the length direction of the rotating part can be controlled.

[0003] However, the three-dimensional spray direction provided by the water spray device is in the vertical or oblique vertical direction. Since the shapes of tableware are various, the vertical spray direction can only directly spray the tableware surface in the vertical direction, while the tableware surface in the horizontal direction, especially the deep horizontal tableware surface, is difficult to be fully sprayed by the vertical spray water, and the tableware surface that cannot be sprayed will inevitably have the problem of not being clean.

[0004] Although the spray device can be extended and retracted, it is always located in the cavity of the cavity dishwasher and occupies space in the cavity.

[0005] In addition, after the dishwasher is finished washing, there is a lot of residual water in the inner tank and on the dishes, and this residual water is dried by the residual heat of the inner tank and the dishes. However, due to the large amount of residual water in the inner tank and the rapid cooling of the inner tank, the residual heat of the inner tank is not enough to evaporate the residual water, so there is still a lot of water in the inner tank for a long time after washing the dishes. When the dishwasher door is closed for a long time, the odor in the dishwasher will be heavy and it is easy to breed bacteria, so it is necessary to set a drying structure on the dishwasher.

[0006] For example, the Chinese utility model patent with patent number CN202120070986.5 (publication number CN215838910U) discloses a drying device for a dishwasher, which includes a drying fan assembly arranged on the inner tank body and an exhaust assembly arranged on the inner tank body. The drying fan assembly heats the external air and sends it into the inner tank body to dry the inner tank body, and then discharges it through the exhaust assembly.

[0007] The drying fan assembly is arranged on the outer wall of the inner tank, and enters the inner tank through the air inlet on the inner tank to dry the washing cavity and tableware. The airflow entering the washing cavity may be blocked by tableware, etc., resulting in poor airflow response, affecting the drying effect, and the fan will cause noise and increase costs. Summary of the invention

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

[0009] The second technical problem to be solved by the present invention is to provide a cleaning machine using the above-mentioned injection structure in view of the current status of the prior art, in which the injector does not occupy the space in the box.

[0010] The technical solution adopted by the present invention to solve the above-mentioned first technical problem is: a spray structure for a cleaning machine, characterized in that it includes

[0011] A joint is arranged vertically, the interior of the joint is hollow, and the joint is provided with an opening in fluid communication with the interior of the joint;

[0012] The ejector is inserted into the joint and can move up and down along the joint. The ejector includes

[0013] A sliding tube, the sliding tube having a closed top and an open bottom, and the sliding tube having an inlet that can communicate with the opening;

[0014] The spray arm is vertically arranged, the interior of the spray arm is hollow, the upper part of the spray arm is inserted and matched with the lower part of the sliding tube and the two are fixed in the axial direction of the spray arm, and a spray hole connected with the internal fluid of the spray arm is opened on the side wall of the spray arm.

[0015] In order to further reduce the space occupied by the sprayer, the spray arm includes at least two spray arm units arranged in sequence in the vertical direction, the spray arm located at the top is fixedly connected to the sliding pipe in the vertical direction, and of the two adjacent spray arm units, the spray arm unit located at the bottom can move axially relative to the spray arm unit at the top. In this way, the length of the spray arm can be adjusted, and when the sprayer is moved outside the box of the cleaning machine, the spray arm can be retracted to minimize the space occupied; when the sprayer is located in the box of the cleaning machine for washing, the spray arm can be extended to expand the spray range.

[0016] In the above scheme, the spray arm unit has two arms, namely, an upper spray arm and a lower spray arm, one of which is provided with a guide column extending along its axial direction, and a guide groove extending along its axial direction is provided in the guide column, and the other of the upper spray arm and the lower spray arm is provided with a guide rod extending along its axial direction, and the guide rod is inserted in the guide groove and can slide along the guide groove. The guide rod cooperates with the guide column to guide the moving trajectory of the lower spray arm.

[0017] In order to drive the lower spray arm to move up and down, the guide column is arranged in the upper spray arm and extends to the top of the sliding tube, the guide rod is arranged in the lower spray arm, and the top of the sliding tube is provided with an electric air pump connected to the guide groove so as to drive the guide rod to move. The cooperation of the guide rod and the guide column not only facilitates the guidance of the movement of the lower spray arm, but also cooperates with the air pump to drive the lower spray arm to move.

[0018] In order to drive the ejector to move relative to the joint as a whole, a telescopic rod that can be telescoped in the vertical direction is provided on the outer peripheral wall of the joint, and the top of the telescopic rod is fixedly connected to the sliding tube. When the telescopic rod is telescoped, the ejector can be driven to move.

[0019] The telescopic rod can be a bellows or a telescopic rod comprising at least two rod bodies which are arranged in sequence in the vertical direction, and two adjacent rod bodies can produce relative displacement in the axial direction. The telescopic rod has a simple structure, and the bellows is generally made of a flexible material. The structure of the telescopic rod of the present application allows it to be made of metal material, which has high strength and long service life compared to the bellows.

[0020] In order to prevent the injector from occupying too much space in the vertical direction after it moves to the upper limit position, the joint includes a fixed seat and a movable seat, both of which are tubular. The movable seat and the fixed seat are rotatably connected by a pin extending in the front-to-back direction. The pin is arranged at the bottom of the side wall of the movable seat. The movable seat can be in a first state in which its center line coincides with the center line of the fixed seat. In this state, the sliding tube is inserted in the movable seat, and the inlet of the sliding tube is connected to the opening on the joint; the movable seat can be in a second state in which its center line is perpendicular to the center line of the fixed seat. In this state, the lower end of the spray arm is inserted in the movable seat. In this way, when the injector moves to the lower limit position, the center line of the movable seat is perpendicular to the center line of the fixed seat, and the center line of the injector is also perpendicular to the center line of the fixed seat, and the space occupied by the injection structure as a whole is small.

[0021] In the above scheme, the movable seat can be inserted into the fixed seat, the first opening is opened on the first side wall of the fixed seat, the avoidance opening with a top notch is opened on the second side wall of the fixed seat, the pin is rotatably mounted on the second side wall of the fixed seat and is located at the lower end of the avoidance opening, and the first side wall and the second side wall are adjacently arranged;

[0022] The movable seat is provided with a second opening which can be connected to the first opening, and the second opening and the first opening together constitute the opening, so that when the movable seat is in the first state, the movable seat is connected to the interior of the fixed seat without affecting the flow of the fluid.

[0023] The movable seat can be rotated manually. In order to improve the convenience of use, the injection structure also includes a driving mechanism connected to the pin shaft, the driving mechanism includes a motor, a first gear connected to the output shaft of the motor, and a second gear meshing with the first gear. The motor is installed on the fixed seat, and the second gear is installed on the pin shaft and the two are coaxial. In this way, when the movable seat needs to be rotated, the motor is operated to drive the second gear to rotate, and then the first gear rotates to drive the movable seat to flip, without manual operation.

[0024] In order to expand the spraying range of the spray arm, the spray arm is rotatably connected to the sliding pipe, and the spray arm can rotate around its axis.

[0025] The technical solution adopted by the present invention to solve the second technical problem is: a cleaning machine using the above-mentioned spraying structure, characterized in that: it also includes

[0026] A box body has a washing chamber inside, and a through hole connected to the washing chamber is opened on the top wall of the box body, and the bottom of the joint is inserted into the through hole;

[0027] A pipe body, used for conveying water or hot air flow, the pipe body is arranged on the top wall of the box body and located outside the box body, and the pipe body is connected with the opening of the joint;

[0028] The dish rack is arranged in the washing chamber, and the spray arm vertically passes through the dish rack.

[0029] Compared with the prior art, the advantages of the present invention are as follows: 1. The ejector of the present invention can move as a whole relative to the joint. If the ejector ejects cleaning water, after the dishes on the dish rack are cleaned as a whole, the ejector can be moved to the area on the dish rack where dirt is more serious, and targeted cleaning can be performed to reduce cleaning dead angles and achieve good cleaning effects. If the fluid ejected by the ejector is hot air flow, the drying dead angle can also be reduced by moving the position to improve the drying effect. 2. When the ejector structure of the present invention is applied to a cleaning machine, in addition to the aforementioned advantages, when the cleaning machine is not working, the ejector can be moved as a whole outside the box of the cleaning machine, without occupying the space in the washing chamber of the cleaning machine. In addition, when the spray arm ejects hot air flow, because the spray arm is vertically arranged, the hot air flow flows from the center to the surroundings, the residual water on the dishes evaporates quickly, and the drying efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of an embodiment of the present invention (the spray structure is in an unfolded state);

[0031] Figure 2 for Figure 1 A cross-sectional view of

[0032] Figure 3 for Figure 2 A magnified image of point A;

[0033] Figure 4 for Figure 1 A schematic diagram of the structure without the box and the bowl rack;

[0034] Figure 5 for Figure 4 A cross-sectional view of

[0035] Figure 6 for Figure 5 A schematic diagram of the structure of the joint in FIG.

[0036] Figure 7 for Figure 6 Schematic diagram of the decomposition of

[0037] Figure 8 It is a structural schematic diagram of an embodiment of the present invention (the spray structure is in a folded state);

[0038] Fig. 9 for Fig. 9 A cross-sectional view of

[0039] Fig.10 for Figure 8 A cross-sectional view without the cabinet and the bowl rack. DETAILED DESCRIPTION

[0040] The present invention is further described in detail below with reference to the accompanying drawings.

[0041] like Figures 1 to 10 As shown, the cleaning machine of this preferred embodiment includes a housing 1, a spray structure A, a pipe body 2 and a dish rack 3, and the dish rack 3 adopts an existing structure.

[0042] like Figure 2 , 3 As shown, a washing cavity 11 is provided inside the box body 1, a through hole 12 connected to the washing cavity 11 is opened on the top wall of the box body 1, a dish rack 3 is arranged in the washing cavity 11, a pipe body 2 is arranged on the top wall of the box body 1 and is located outside the box body 1, and the pipe body 2 is used to transport water or hot air flow, that is, as a water inlet pipe or an air inlet pipe.

[0043] The injection structure A includes a connector 4, an injector 5 and a driving mechanism 6. The connector 4 is vertically arranged, and the bottom of the connector 4 is fixedly inserted into the through hole 12 of the box body 1. The interior of the connector 4 is hollow, and an opening 41 is provided on the connector 4 that is fluidically connected to the interior of the connector. The tube body 2 is connected to the opening 41 of the connector 4, and the fluid in the tube body 2 can flow into the connector 4.

[0044] like Figure 5 As shown, the injector 5 is inserted into the joint 4 and can move up and down along the joint 4. The injector 5 includes a sliding tube 51 and a spray arm 52. The sliding tube 51 is closed at the top and open at the bottom. The sliding tube 51 is provided with an inlet 511 that can be connected to the opening 41 on the joint 4.

[0045] The spray arm 52 is vertically arranged and passes through the bowl rack 3. The interior of the spray arm 52 is hollow. The upper part of the spray arm 52 is inserted into and matched with the lower part of the sliding tube 51 and the two are fixed in the axial direction of the spray arm 52. A spray hole 520 is opened on the side wall of the spray arm 52 and is fluidically connected to the interior of the spray arm 52.

[0046] In this embodiment, the spray arm 52 includes at least two spray arm units arranged in sequence in the vertical direction. The uppermost spray arm 52 is vertically fixedly connected to the sliding tube 51. Among the two adjacent spray arm units, the lower spray arm unit can move axially relative to the upper spray arm unit.

[0047] The above-mentioned spray arm unit has two parts, namely an upper spray arm 521 and a lower spray arm 522. The lower spray arm 522 is inserted in the upper spray arm 521. The upper spray arm 521 is provided with a guide column 5211 extending along its axial direction. The guide column 5211 extends to the top of the sliding tube 51. The guide column 5211 is provided with a guide groove 52111 extending along its axial direction. The lower spray arm 522 is provided with a guide rod 5221. The guide rod 5221 is inserted in the guide groove 52111 and can slide along the guide groove 52111.

[0048] The top of the upper spray arm 521 is sleeved on the lower part of the sliding tube 51. A circle of embedding grooves 512 are provided on the outer peripheral wall of the sliding tube 51. The top of the upper spray arm 521 extends inward to form a flange 5212. The flange 5212 is embedded in the embedding groove 512 and can slide along the embedding groove 512, that is, the spray arm 52 is rotatably connected to the sliding tube 51, and the spray arm 52 can rotate around its axis. The rotational power of the spray arm 52 is the reverse force when the spray hole 520 sprays fluid, that is, the working principle of the existing spray arm rotation. Of course, a driving mechanism can also be used to drive the spray arm 52 to rotate, and the spray arm 52 can also be set to be fixed in the circumferential direction.

[0049] The top of the sliding tube 51 is provided with an electric air pump 7 which is connected to the guide groove 52111 so as to drive the guide rod 5221 to move. The cooperation between the guide rod 5221 and the guide column 5211 is not only convenient for guiding the movement of the lower spray arm 522, but also can cooperate with the electric air pump 7 to drive the lower spray arm 522 to move. The electric air pump 7 can adopt an existing structure, so its structure and working principle are not described in detail here.

[0050] A vertically extending strip groove 5213 is provided on the inner peripheral wall of the upper spray arm 521, and a slider 5222 embedded in the strip groove 5213 is provided on the outer peripheral wall of the lower spray arm 522. The slider 5222 can slide along the strip groove 5213, and the cooperation between the slider 5222 and the strip groove 5213 also plays a role in guiding the moving trajectory of the lower spray arm 522.

[0051] like Figure 5 , 10 As shown, a telescopic rod 8 capable of being telescopically extended and retracted in the vertical direction is provided on the outer peripheral wall of the joint 4, and the top of the telescopic rod 8 is fixedly connected to the sliding tube 51. In this embodiment, the telescopic rod 8 includes at least two rod bodies 81 which are sequentially mounted in the vertical direction, and two adjacent rod bodies 81 can produce relative displacement in the axial direction. In this embodiment, a driving assembly for driving the telescopic rod 8 to be extended and retracted is not shown. The driving assembly can be a motor, which is connected to the rod body at the farthest end. This is a prior art and will not be described in detail here. Of course, the telescopic rod 8 can also be manually driven to be extended and retracted. In addition, the structure of the telescopic rod 8 in this embodiment is also existing, so its telescopic principle will not be explained here.

[0052] like Figure 6 , 7As shown, the joint 4 includes a fixed seat 42 and a movable seat 43, both of which are tubular. The movable seat 43 can be inserted into the fixed seat 42. A first opening 4211 is provided on the first side wall 421 of the fixed seat 42, and a avoidance opening 4221 with a top notch is provided on the second side wall 422 of the fixed seat 42. The first side wall 421 and the second side wall 422 are arranged adjacent to each other. The movable seat 43 and the fixed seat 42 are rotatably connected by a pin shaft 44 extending in the front-to-back direction. The pin shaft 44 is arranged at the bottom of the side wall of the movable seat 43, and the pin shaft 44 is rotatably installed on the second side wall of the fixed seat 42 and is located at the lower end of the avoidance opening 4221. The fixed seat 42 is provided with an axis hole 4222 in which the end of the pin shaft 44 is rotatably installed, and the movable seat 43 can be rotated from the avoidance opening 4221 to the outside of the fixed seat 42.

[0053] The movable seat 43 can be in a first state in which its center line coincides with the center line of the fixed seat 42. In this state, the sliding tube 51 is inserted in the movable seat 43, and the inlet 511 of the sliding tube 51 is connected to the opening 41 on the joint 4; the movable seat 43 can be in a second state in which its center line is perpendicular to the center line of the fixed seat 42. In this state, the lower end of the spray arm 52 is inserted in the movable seat 43.

[0054] The movable seat 43 is provided with a second opening 431 which can be correspondingly communicated with the first opening 4211 . The second opening 431 and the first opening 4211 together constitute the opening 41 .

[0055] The driving mechanism 6 is connected to the pin shaft 44 by driving, and includes a motor 61, a first gear 62 connected to the output shaft of the motor 61 by driving, and a second gear 63 meshing with the first gear 62, and the first gear 62 can mesh with the second gear 63 directly or indirectly through an intermediate gear. The motor 61 is mounted on the fixed seat 42, and the second gear 63 is mounted on the pin shaft 44 and the two are coaxial. In this way, when the movable seat 43 needs to be rotated, the motor 61 is operated to drive the second gear 63 to rotate, and then the first gear 62 rotates to drive the movable seat 43 to flip, without manual operation.

[0056] The working process of the cleaning machine of this embodiment is as follows:

[0057] During the operation of the cleaning machine, Figure 1As shown, the spray arm 52 extends vertically, and the spray arm 52 is in an extended state (i.e., the lower spray arm 522 is not retracted into the upper spray arm 521), the movable seat 43 is in a first state in which its center line coincides with the center line of the fixed seat 42, the sliding tube 51 is inserted in the movable seat 43, and the inlet 511 of the sliding tube 51 is connected to the opening 41 on the joint 4, and the spray arm 52 sprays cleaning water or hot air flow into the washing chamber 11 to clean or dry the tableware. After the set cleaning program is completed, the ejector 5 is moved to the area on the dish rack 3 that is more dirty or difficult to dry, and targeted cleaning or drying is performed to reduce cleaning or drying dead corners, thereby achieving a good cleaning or drying effect.

[0058] When the cleaning machine stops working, the electric air pump 7 starts working, the lower spray arm 522 retracts into the upper spray arm 521, and the telescopic rod 8 extends, driving the ejector 5 to move upward as a whole. After the ejector 5 moves to the upper limit position (at this time, the lower end of the spray arm 52 is located in the movable seat 43), the movable seat 43 rotates and is in the second state in which its center line is perpendicular to the center line of the fixed seat 42. At this time, the center line of the ejector 5 is also perpendicular to the center line of the fixed seat 42. Fig. 9 , 10 As shown, the spray structure is in a folded state as a whole, occupies a small space, and does not occupy the space in the washing chamber 11.

[0059] 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.

[0060] 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, characterized in that: include A joint (4) is arranged vertically, the interior of the joint (4) is hollow, and the joint (4) is provided with an opening (41) in fluid communication with the interior of the joint; The ejector (5) is inserted into the joint (4) and can move up and down along the joint (4). The ejector (5) includes A sliding tube (51), the sliding tube (51) is closed at the top and open at the bottom, and the sliding tube (51) is provided with an inlet (511) that can be connected to the opening (41) correspondingly; The spray arm (52) is vertically arranged, the interior of the spray arm (52) is hollow, the upper portion of the spray arm (52) is plug-fitted with the lower portion of the sliding tube (51), and the two are fixed in the axial direction of the spray arm (52), and a spray hole (520) is provided on the side wall of the spray arm (52) and is in fluid communication with the interior of the spray arm (52); The spray arm (52) comprises at least two spray arm units which are arranged in sequence in the vertical direction. The spray arm (52) located at the top is fixedly connected to the sliding pipe (51) in the vertical direction. Among the two adjacent spray arm units, the spray arm unit located at the bottom can move axially relative to the spray arm unit at the top.

2. The injection structure according to claim 1, characterized in that: The spray arm unit comprises two parts, namely an upper spray arm (521) and a lower spray arm (522); one of the upper spray arm (521) and the lower spray arm (522) is provided with a guide column (5211) extending along its axial direction; the guide column (5211) is provided with a guide groove (52111) extending along its axial direction; the other of the upper spray arm (521) and the lower spray arm (522) is provided with a guide rod (5221) extending along its axial direction; the guide rod (5221) is inserted into the guide groove (52111) and can slide along the guide groove (52111).

3. The injection structure according to claim 2, characterized in that: The guide column (5211) is arranged in the upper spray arm (521) and extends to the top of the sliding tube (51), the guide rod (5221) is arranged in the lower spray arm (522), and the top of the sliding tube (51) is provided with an electric air pump (7) which is connected to the guide groove (52111) so as to drive the guide rod (5221) to move.

4. The injection structure according to claim 1, characterized in that: A telescopic rod (8) which can be telescoped in the vertical direction is provided on the outer peripheral wall of the joint (4), and the top of the telescopic rod (8) is fixedly connected to the sliding tube (51).

5. The injection structure according to claim 4, characterized in that: The telescopic rod (8) comprises at least two rod bodies (81) which are arranged in sequence in the vertical direction, and two adjacent rod bodies (81) can generate relative displacement in the axial direction.

6. The injection structure according to any one of claims 1 to 5, characterized in that: The joint (4) comprises a fixed seat (42) and a movable seat (43) both of which are tubular. The movable seat (43) and the fixed seat (42) are rotatably connected via a pin shaft (44) extending in the front-rear direction. The pin shaft (44) is arranged at the bottom of the side wall of the movable seat (43). The movable seat (43) can be in a first state in which its center line coincides with the center line of the fixed seat (42). In this state, the sliding tube (51) is inserted into the movable seat (43), and the inlet (511) of the sliding tube (51) is connected to the opening (41) on the joint (4); the movable seat (43) can be in a second state in which its center line is perpendicular to the center line of the fixed seat (42). In this state, the lower end of the spray arm (52) is inserted into the movable seat (43).

7. The injection structure according to claim 6, characterized in that: The movable seat (43) can be inserted into the fixed seat (42); a first opening (4211) is provided on a first side wall of the fixed seat (42); a relief opening (4221) with a top notch is provided on a second side wall of the fixed seat (42); a pin shaft (44) is rotatably mounted on the second side wall of the fixed seat (42) and is located at the lower end of the relief opening (4221); and the first side wall and the second side wall are adjacently arranged; The movable seat (43) is provided with a second opening (431) which can be correspondingly communicated with the first opening (4211); the second opening (431) and the first opening (4211) together constitute the opening (41).

8. The spray structure according to claim 6, characterized in that: The injection structure also includes a driving mechanism (6) connected to the pin shaft (44), the driving mechanism (6) includes a motor (61), a first gear (62) connected to the output shaft of the motor (61), and a second gear (63) meshing with the first gear (62), the motor (61) is mounted on the fixed seat (42), and the second gear (63) is mounted on the pin shaft (44) and the two are coaxial.

9. The injection structure according to any one of claims 1 to 8, characterized in that: The spray arm (52) is rotatably connected to the sliding tube (51), and the spray arm (52) can rotate around its axis.

10. A cleaning machine using the spray structure according to any one of claims 1 to 8, characterized in that: Also includes A box body (1) has a washing chamber (11) inside, and a through hole (12) connected to the washing chamber (11) is provided on the top wall of the box body (1), and the bottom of the joint (4) is inserted into the through hole (12); A pipe body (2) for conveying water or hot air flow, the pipe body (2) being arranged on the top wall of the box body (1) and located outside the box body (1), the pipe body (2) being connected to the opening (41) of the joint (4); The dish rack (3) is arranged in the washing chamber (11), and the spray arm (52) vertically passes through the dish rack (3).

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