Cleaning machine

Abstract

The utility model relates to a cleaning machine which comprises a box body and a spraying arm, a plurality of water spraying holes in different directions are formed in the spraying arm, a water pump used for providing power for water drawing of the spraying arm is arranged at the bottom of the box body, and an output shaft of a driving piece of the water pump extends into the spraying arm. And a transmission assembly which can connect the spraying arm with the output shaft of the driving piece, rotates forwards along with the forward rotation of the output shaft and rotates backwards along with the backward rotation of the output shaft is arranged in the spraying arm. The driving part of the water pump of the cleaning machine is used as power, the spraying arm is linked with the output shaft of the driving part through the transmission assembly, when the output shaft of the driving part rotates forwards, the spraying arm is driven to rotate forwards, water columns are sprayed along the corresponding trend through a part of the water spraying holes, and when the output shaft of the driving part rotates backwards, the spraying arm is driven to rotate backwards. Water columns are sprayed along the corresponding trend through the other part of the water spraying holes, and due to the fact that the water spraying directions of the water spraying holes are different, all areas of the washing cavity are completely covered through forward and reverse rotation of the spraying arm, cleaning dead corners are eliminated, and the cleaning effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of dishwashers, in particular to a washing machine used for washing tableware, fruits and vegetables. Background Art

[0002] Dishwashers are generally provided with spray arms for rinsing dishes or fruits and vegetables by spraying water jets.

[0003] In order to eliminate blind spots in cleaning and expand the cleaning effect, the applicant's prior application CN202211611048.7 "A cleaning machine" disclosed a structure, which includes a box body and a spray arm. The spray arm is rotatably arranged in the box body, and the spray arm is provided with a hollow flow channel. The spray arm is also provided with a water outlet connected to the flow channel, and the water outlet is connected to a nozzle that can rotate relative to the spray arm.

[0004] The above solution eliminates the cleaning dead corners at the corners of the washing chamber by using the nozzle. However, since the water flow at the end of the spray arm is relatively unstable, it is easy to cause the nozzle to rotate unstably or even get stuck, which affects the cleaning effect to a certain extent. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a cleaning machine which can eliminate cleaning dead angles and improve cleaning effect by changing the rotation direction of the spray arm in view of the current status of the prior art.

[0006] The technical solution adopted by the utility model to solve the above technical problems is:

[0007] A cleaning machine comprises a box body and a spray arm, wherein the spray arm is rotatably arranged in the box body, a plurality of water spray holes in different directions are opened on the spray arm, a water pump for providing power for the spray arm to draw water is arranged at the bottom of the box body, an output shaft of a driving member of the water pump extends into the spray arm, and a transmission component is arranged in the spray arm which can connect the spray arm with the output shaft of the driving member and rotate forward with the forward rotation of the output shaft and reverse with the reverse rotation of the output shaft.

[0008] The utility model utilizes the driving member of the water pump of the cleaning machine as the power, and links the spray arm with the output shaft of the driving member through a transmission component. When the output shaft of the driving member rotates forward, the spray arm is driven to rotate forward, and water columns are sprayed along the corresponding trend through a part of water spray holes. When the output shaft of the driving member is reversed, the spray arm is driven to reverse, and water columns are sprayed along the corresponding trend through another part of water spray holes. Since the water spraying directions of the water spray holes are different, all areas of the washing chamber are fully covered through the forward and reverse rotation of the spray arm, thereby eliminating cleaning dead corners and improving the cleaning effect.

[0009] Preferably, the top of the spray arm is provided with a top plate arranged at intervals, and a gas collecting cavity is enclosed between the top plate and the top wall of the spray arm. The top plate is provided with jet holes arranged corresponding to the water spray holes, and a gap is formed between the jet holes and the water spray holes for air to be sucked into the jet water column in the jet state. According to the Venturi effect, when the water column passes through the water spray hole and the jet hole, negative pressure is generated in the gap, thereby sucking the air around it into the water column, forming a cavitation water column with bubbles. When the cavitation water column hits the surface of the object to be cleaned, the bubbles burst at the moment of bursting, which can increase the stripping force on the pollutants and improve the cleaning effect.

[0010] Preferably, the output shaft of the driving member extends from bottom to top into the air collecting chamber, the transmission assembly is a gear set arranged in the air collecting chamber, and the output shaft of the driving member is linked to the spray arm deceleration through the gear set. The above structure realizes the deceleration of the directional and constant speed rotation of the spray arm to meet the rotation requirements of the spray arm.

[0011] Preferably, the transmission assembly includes a first gear, a second gear, and a third gear, wherein the first gear is connected to the output shaft of the driving member and rotates with the output shaft, the diameter of the second gear is larger than the diameter of the first gear and meshes with the first gear for transmission, an auxiliary gear is arranged on the top of the second gear and rotates with it, and the third gear is constrained on the top wall of the air collecting chamber and meshes with the auxiliary gear for transmission. The above structure facilitates the stable deceleration linkage between the output shaft of the driving member and the spray arm.

[0012] In the utility model, the water pump includes a guide sleeve, an impeller assembly and a driving member. The bottom of the box is provided with a concave water return area. The guide sleeve is provided in the water return area and the bottom is the water inlet end and the top is the water outlet end. The spray arm is rotatably supported on the guide seat and the bottom is connected to the water outlet end of the guide seat. The impeller assembly is rotatably provided in the guide seat and the spray arm to pump water in the water return area into the spray arm. The driving member is provided on the outer bottom wall of the box and the output shaft extends upward through the bottom wall of the box and is connected to the impeller assembly. With the above structure, the driving member is operated to drive the impeller to rotate, and the water in the water return area can be pumped into the spray arm to form a spray water column for cleaning.

[0013] Preferably, the spray arm is provided with a first flow channel and a second flow channel arranged at intervals from top to bottom, the central parts of the first flow channel and the second flow channel are both water collection chambers that surround at least the upper part of the impeller assembly, the first flow channel and the second flow channel extend outward from the corresponding water collection chambers through the spiral section in the length direction, and the spiral directions of the first flow channel and the second flow channel are opposite, the top of the first flow channel is provided with a first water spray hole, the top of the second flow channel is provided with a second water spray hole that can pass through the first flow channel, and the spray directions of the first water spray hole and the second water spray hole are different. The above structure is adopted to realize that when the spray arm is in the forward and reverse states, water flows out from the water spray holes in different directions to cover a larger cleaning area.

[0014] Preferably, the impeller assembly includes a centrifugal impeller located in the water collecting chamber and an axial flow impeller located under the spray arm, and the axial flow impeller includes a blade assembly that can draw water upward in both forward and reverse rotation states of the spray arm. With such a structure, when the spray arm rotates in different directions, the axial flow impeller can draw water from bottom to top without interference.

[0015] Preferably, the axial flow impeller includes a sleeve sleeved on the outer periphery of the output shaft and a guide sleeve sleeved on the outer periphery of the sleeve at intervals, a first water-drawing channel capable of drawing water upward when the spray arm is in the forward rotation state is formed inside the guide sleeve, and a second water-drawing channel capable of drawing water upward when the spray arm is in the reverse rotation state is formed between the guide sleeve and the inner wall of the guide seat. A first blade extending in an axial spiral is arranged inside the guide sleeve, and a second blade extending in an axial spiral is arranged on the outer peripheral wall of the guide sleeve, and the spiral directions of the first blade and the second blade are opposite. With the above structure, water can be drawn unidirectionally from bottom to top when the axial flow impeller rotates in the forward or reverse direction.

[0016] Compared with the prior art, the advantages of the utility model are: the utility model utilizes the driving member of the water pump of the cleaning machine as the power, and links the spray arm with the output shaft of the driving member through a transmission assembly. When the output shaft of the driving member rotates forward, the spray arm is driven to rotate forward, and water columns are sprayed along the corresponding trend through a part of the water spray holes. When the output shaft of the driving member is reversed, the spray arm is driven to reverse, and water columns are sprayed along the corresponding trend through another part of the water spray holes. Since the water spraying directions of the water spray holes are different, the forward and reverse rotation of the spray arm can fully cover all areas of the washing chamber, eliminate cleaning dead corners, and improve the cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a partial structural schematic diagram of a cleaning machine according to an embodiment of the utility model;

[0018] Figure 2 for Figure 1 A cross-sectional view of

[0019] Figure 3 for Figure 2 A magnified view of part A;

[0020] Figure 4 This is an exploded view of the spray arm in the embodiment of the utility model;

[0021] Figure 5 It is a cross-sectional view of the spray arm in the embodiment of the utility model. DETAILED DESCRIPTION

[0022] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0023] like Figures 1 to 5 As shown, the cleaning machine of this embodiment includes a box body 1 and a spray arm 2. The spray arm 2 is rotatably arranged in the box body 1. A plurality of water spray holes in different directions are opened on the spray arm 2. A water pump 3 for providing power for the spray arm 2 to draw water is arranged at the bottom of the box body 1. The output shaft 311 of the driving member 31 of the water pump 3 extends into the spray arm 2. The spray arm 2 is provided with a transmission component 4 which can connect it with the output shaft 311 of the driving member 31 and rotate forward with the forward rotation of the output shaft 311 and reverse with the reverse rotation of the output shaft 311.

[0024] The top of the spray arm 2 is provided with a top plate 21 arranged at intervals, and a gas collecting chamber 22 is enclosed between the top plate 21 and the top wall of the spray arm 2. The top plate 21 is provided with jet holes 23 arranged corresponding to the water spray holes, and a gap 10 is formed between the jet holes 23 and the water spray holes for air to be sucked into the jet water column in the jet state. According to the Venturi effect, when the water column passes through the water spray holes and the jet holes, negative pressure is generated at the gap, thereby sucking the air around it into the water column, forming a cavitation water column with bubbles. When the cavitation water column hits the surface of the object to be cleaned, the bubbles burst at the moment, which can increase the stripping force on the pollutants and improve the cleaning effect.

[0025] In this embodiment, the output shaft 311 of the driving member 31 extends from bottom to top into the gas collecting chamber 22, and the transmission assembly 4 is a gear set disposed in the gas collecting chamber 22. The output shaft 311 of the driving member 31 is linked to the spray arm 2 through the gear set to reduce speed. The above structure realizes the deceleration of the directional and constant speed rotation of the spray arm to meet the rotation requirements of the spray arm.

[0026] The transmission assembly 4 of this embodiment includes a first gear 41, a second gear 42, and a third gear 43. The first gear 41 is connected to the output shaft 311 of the driving member 3 and rotates with the output shaft 311. The diameter of the second gear 42 is larger than the diameter of the first gear 41 and meshes with the first gear 41 for transmission. The top of the second gear 42 is provided with an auxiliary gear 421 that rotates with it. The third gear 43 is constrained on the top wall of the gas collecting chamber 22 through a rotating shaft and meshes with the auxiliary gear 421 for transmission. The above structure facilitates the stable deceleration linkage between the output shaft 311 of the driving member and the spray arm 2.

[0027] In this embodiment, the water pump 3 includes a guide seat 32, an impeller assembly 33 and a driving member 31. A concave return water area 11 is provided at the bottom of the housing 1. The guide seat 32 is provided in the return water area 11 and the bottom is the water inlet end and the top is the water outlet end. The spray arm 2 is rotatably supported on the guide seat 32 and the bottom is connected to the water outlet end of the guide seat 32. The impeller assembly 33 is rotatably provided in the guide seat 32 and the spray arm 2 to pump the water in the return water area 11 into the spray arm 2. The driving member 31 is provided on the outer bottom wall of the housing 1 and the output shaft 311 extends upward through the bottom wall of the housing 1 and is connected to the impeller assembly 33. With the above structure, the driving member is operated to drive the impeller to rotate, and the water in the return water area can be pumped into the spray arm to form a spray water column for cleaning.

[0028] The spray arm 2 of this embodiment is provided with a first flow channel 201 and a second flow channel 202 arranged in an upper and lower interval. The central parts of the first flow channel 201 and the second flow channel 202 are both water collecting chambers 24 that surround the upper part of the impeller assembly 33. The first flow channel 201 and the second flow channel 202 extend outward along the length direction through the spiral section from the corresponding water collecting chamber 24, and the spiral directions of the first flow channel 201 and the second flow channel 202 are opposite. The top of the first flow channel 201 is provided with a first water spray hole 251, and the top of the second flow channel 202 is provided with a second water spray hole 252 that can pass through the first flow channel 201. The spray directions of the first water spray hole 251 and the second water spray hole 252 are different. The above structure is adopted to realize that when the spray arm is in the forward and reverse states, water flows out from the water spray holes in different directions to cover a larger cleaning area.

[0029] The impeller assembly 33 of this embodiment includes a centrifugal impeller 331 located in the water collecting chamber 24 and an axial flow impeller 332 located under the spray arm 2. The axial flow impeller 332 includes a blade assembly that can draw water upward in both the forward and reverse rotation states of the spray arm 2. With such a structure, when the spray arm rotates in different directions, the axial flow impeller can draw water from bottom to top without interference.

[0030] The axial flow impeller 332 includes a sleeve 301 sleeved on the outer periphery of the output shaft 311 and a guide sleeve 302 sleeved on the outer periphery of the sleeve 301 at intervals. A first water-drawing channel 01 capable of drawing water upward when the spray arm 2 rotates forward is formed inside the guide sleeve 302, and a second water-drawing channel 02 capable of drawing water upward when the spray arm 2 rotates backward is formed between the guide sleeve 302 and the inner wall of the guide seat 32. A first blade 001 extending in an axial spiral is arranged inside the guide sleeve 302, and a second blade 002 extending in an axial spiral is arranged on the outer peripheral wall of the guide sleeve 302. The spiral directions of the first blade 001 and the second blade 002 are opposite. With the above structure, water can be drawn unidirectionally from bottom to top when the axial flow impeller rotates forward or reversely.

[0031] This embodiment uses the driving member 31 of the washing machine water pump 3 as the power, and links the spray arm 2 with the output shaft 311 of the driving member 31 through the transmission component 4. When the output shaft 311 of the driving member 31 rotates forward, it drives the spray arm 2 to rotate forward, and sprays water columns through a part of the water spray holes along the corresponding trend. When the output shaft 311 of the driving member 31 is reversed, it drives the spray arm 2 to reverse, and sprays water columns through another part of the water spray holes along the corresponding trend. Since the water spraying directions of the water spray holes are different, the forward and reverse rotation of the spray arm 2 can fully cover all areas of the washing chamber, eliminate cleaning dead corners, and improve the cleaning effect.

[0032] In the specification and claims of the present invention, terms indicating directions, such as "front", "rear", "up", "down", "left", "right", "side", "top", "bottom", etc., are used to describe various exemplary structural parts and elements of the present invention, but these terms are used here only for the purpose of convenience of description and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different directions, these terms indicating directions are only used as explanations 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.

Claims

1. A cleaning machine, comprising a housing (1) and a spray arm (2), wherein the spray arm (2) is rotatably arranged in the housing (1), and the spray arm (2) is provided with a plurality of water spray holes in different directions, characterized in that: A water pump (3) for providing power for the spray arm (2) to draw water is arranged at the bottom of the box body (1); an output shaft (311) of a driving member (31) of the water pump (3) extends into the spray arm (2); and a transmission assembly (4) is arranged in the spray arm (2) which can be connected to the output shaft (311) of the driving member (31) and can rotate forwardly when the output shaft (311) rotates forwardly and reversely when the output shaft (311) rotates reversely.

2. The cleaning machine according to claim 1, characterized in that: The top of the spray arm (2) is provided with a top plate (21) arranged at intervals, an air collecting chamber (22) is enclosed between the top plate (21) and the top wall of the spray arm (2), and jet holes (23) arranged corresponding to the water spray holes are opened on the top plate (21), and a gap (10) is formed between the jet hole (23) and the water spray hole to allow air to be sucked into the jet water column in the jet state.

3. The cleaning machine according to claim 2, characterized in that: The output shaft (311) of the driving member (31) extends from bottom to top into the air collecting chamber (22); the transmission assembly (4) is a gear set arranged in the air collecting chamber (22); the output shaft (311) of the driving member (31) is linked to the spray arm (2) through a deceleration mechanism with the gear set.

4. The cleaning machine according to claim 3, characterized in that: The transmission assembly (4) comprises a first gear (41), a second gear (42), and a third gear (43); the first gear (41) is connected to the output shaft (311) of the driving member (31) and rotates with the output shaft (311); the diameter of the second gear (42) is larger than that of the first gear (41) and meshes with the first gear (41) for transmission; an auxiliary gear is arranged on the top of the second gear (42) and rotates with the second gear; the third gear (43) is constrained on the top wall of the air collecting chamber (22) and meshes with the auxiliary gear for transmission.

5. The cleaning machine according to any one of claims 1 to 4, characterized in that: The water pump (3) comprises a guide seat (32), an impeller assembly (33) and a driving member (31); a concave water return area (11) is arranged at the bottom of the housing (1); the guide seat (32) is arranged in the water return area (11) and has a water inlet at the bottom and a water outlet at the top; the spray arm (2) is rotatably supported on the guide seat and has a bottom connected to the water outlet of the guide seat; the impeller assembly (33) is rotatably arranged in the guide seat and the spray arm (2) and is used to pump the water (3) in the water return area (11) to the spray arm (2); the driving member (31) is arranged on the outer bottom wall of the housing (1) and has an output shaft (311) extending upward through the bottom wall of the housing (1) and connected to the impeller assembly (33).

6. The cleaning machine according to claim 5, characterized in that: The spray arm (2) is provided with a first flow channel (201) and a second flow channel (202) which are arranged in an upper and lower interval. The central parts of the first flow channel (201) and the second flow channel (202) are both water collecting chambers (24) which surround at least the upper part of the impeller assembly (33). The first flow channel (201) and the second flow channel (202) respectively extend outwards from the corresponding water collecting chambers (24) through spiral sections along the length direction. The spiral directions of the first flow channel (201) and the second flow channel (202) are opposite. The top of the first flow channel (201) is provided with a first water spray hole (251). The top of the second flow channel (202) is provided with a second water spray hole (252) which can pass through the first flow channel (201). The spray directions of the first water spray hole (251) and the second water spray hole (252) are different.

7. The cleaning machine according to claim 6, characterized in that: The impeller assembly (33) comprises a centrifugal impeller (331) located in the water collecting chamber (24) and an axial flow impeller (332) located under the spray arm (2); the axial flow impeller (332) comprises a blade assembly capable of drawing water upwards in both forward and reverse rotation states of the spray arm (2).

8. The cleaning machine according to claim 7, characterized in that: The axial flow impeller (332) comprises a shaft sleeve (301) sleeved on the outer periphery of the output shaft (311) and a flow guide sleeve (302) sleeved on the outer periphery of the shaft sleeve at intervals, wherein a first water drawing channel (01) capable of drawing water upward when the spray arm (2) is in a forward rotation state is formed inside the flow guide sleeve (302), and a second water drawing channel (02) capable of drawing water upward when the spray arm (2) is in a reverse rotation state is formed between the flow guide sleeve (302) and the inner wall of the flow guide seat.

9. The cleaning machine according to claim 8, characterized in that: A first blade (001) extending in an axial spiral direction is arranged inside the guide sleeve (302), and a second blade (002) extending in an axial spiral direction is arranged on the outer peripheral wall of the guide sleeve (302), wherein the spiral directions of the first blade and the second blade are opposite.

Images