CN109394117B

CN109394117B - Spray arm and cleaning machine applying same

Info

Publication number: CN109394117B
Application number: CN201710714388.5A
Authority: CN
Inventors: 朱灯光; 徐慧; 史伟杰; 茅忠群; 诸永定
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2017-08-18
Filing date: 2017-08-18
Publication date: 2024-02-20
Anticipated expiration: 2037-08-18
Also published as: CN109394117A

Abstract

The utility model relates to a spray arm, which comprises a spray arm body, wherein the spray arm body is hollow and is provided with a flow channel, the spray arm body is provided with a water inlet at the central part of the bottom, and the wall surface of the spray arm body is provided with spray holes communicated with the flow channel.

Description

Spray arm and cleaning machine applying same

Technical Field

The present disclosure relates to cleaning machines, and particularly to a spray arm and a cleaning machine using the same.

Background

Existing sink washers typically achieve cleaning in two ways: one is to drive the cleaning basket to rotate and spray water into the cleaning basket from top to bottom so as to rinse the fruits and vegetables in the cleaning basket; in the other way, the water is pumped to a certain height from the bottom of the cleaning barrel by the water pump and then sprayed out, so that the fruits and vegetables are sprayed.

First kind abluent structure is as chinese patent of application number 201420767984.1 discloses a novel basin cleaning machine, including spray set, set up the washing basket in wasing the bucket, set up the synchronous machine in wasing the bucket bottom, spray set includes water pump and nozzle, the water pump water inlet sets up in wasing bucket lateral wall or bottom, the water pump delivery port is connected with the aqueduct one end that sets up in wasing the bucket side, aqueduct other end opening is in wasing the side top of basket, its tip is provided with adjustable installation angle's nozzle, synchronous machine drives when wasing the basket rotatory, spray set sprays the fruit vegetables in wasing the basket and washs. The second cleaning structure is as disclosed in the Chinese patent application number 201610110965.5 of the applicant, and comprises a water tank body, wherein an open water pump with an upper water inlet is arranged at the bottom of the water tank body, a water outlet part of the water pump is a spray arm, the spray arm is connected with the water tank body, and the water pump sucks water in the water tank body and then sprays out of the spray arm to clean fruits and vegetables.

These cleaning devices generally only perform spray cleaning (or soaking), and this water flow may cause accumulation of fruits and vegetables in a manner that the fruits and vegetables are applied, and has a certain cleaning effect on some fruits and vegetables with a small number of surfaces, but it is difficult to obtain a good cleaning effect on fruits and vegetables with a large number of surfaces, such as leaf vegetables. For this purpose, chinese patent application 201610110963.6 (publication No. CN105662300 a) discloses an overall H-shape, wherein the split flow path includes a lateral split flow path in the middle and vertical split flow paths on both sides, which biases the water pump at the bottom of the water tank body, such as one end of the water tank body in the length direction, and since the suction force of the water pump on fruits and vegetables at or near the other end of the water tank body in the length direction is small, and a device for collecting residues is required to be additionally provided for the generation of residues at the other end; in order to balance the suction force of two ends of the spray arms on fruits and vegetables, chinese patent No. ZL201621100369.0 (publication No. CN 206239254U) of the present applicant discloses such a water tank cleaning machine comprising two water pumps and two spray arms, wherein the flow dividing passage extends from the first end to the second end of the spray arm, the second end of one spray arm faces the first end of the other spray arm, and the direction of the nozzle of one spray arm is opposite to the direction of the nozzle of the other spray arm, so that the water streams sprayed by the two spray arms are jointly formed into an annular rotary water stream. The two spray arms are arranged, and the direction of the spray nozzle is arranged, so that water flow sprayed by the spray holes can form annular rotary water flow, the spray arms at the two ends apply the same acting force to fruits and vegetables, so that the fruits and vegetables can rotate in a certain direction in the vegetable basket, the fruits and vegetables are in a moving state relative to the water tank body and the water flow, and the water flow can wash each surface of fruits and vegetables to be cleaned, and meanwhile, the ultrasonic generating devices are arranged at the two sides of the spray arms, so that a better cleaning effect is obtained; it requires the provision of two water pumps and two spray arms and for this purpose, further improvements are needed.

Similarly, for a washing machine with a dish washing function, a rotary spray arm is generally adopted, and a washing space of the washing machine is generally square whether the washing machine is a sink type washing machine or a front door washing machine or a drawer type washing machine, so that dead angles can not be washed by water sprayed from the rotary spray arm.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a spray arm which adopts only one water pump and can balance the water flow spray pressure at two ends of the spray arm under the condition of not increasing the power of the water pump and keep the turbulence intensity not weakened so as to improve the cleaning effect.

Another technical problem to be solved by the present utility model is to provide a cleaning machine using the spray arm according to the above state of the art.

The technical scheme adopted for solving the technical problems is as follows: the spray arm comprises a spray arm body, wherein the spray arm body is hollow and is provided with a flow channel, the spray arm body is provided with a water inlet communicated with the flow channel at the central position of the bottom, and the wall surface of the spray arm body is provided with spray holes communicated with the flow channel.

In order to reduce the loss of kinetic energy of water by the opposite impact of the downstream distal end of the O-shaped annular flow passage, the downstream distal end of the annular flow passage is blocked by at least one blocking wall along the water flow direction.

Further, the cross-sectional area of the annular flow passage gradually decreases from upstream to downstream in the water flow direction. The sectional area of the annular flow channel is gradually reduced from the upstream to the downstream, so that the flow velocity of the water flow is large at the downstream with small sectional area, and the flow velocity of the water flow is small at the upstream with large sectional area, and according to the Bernoulli principle, the larger the flow velocity of the fluid, the smaller the pressure, the smaller the flow velocity of the fluid and the larger the pressure; therefore, the water sprayed out from the spray hole of the spray arm body can be pressed from the high pressure upstream to the low pressure downstream, and therefore the water sprayed out from the spray hole at the low pressure downstream of the spray arm body can upwards support the object to be cleaned, the object to be cleaned is in a moving state, and therefore water flow can wash each surface of the object to be cleaned, the cleaning without dead angles is achieved, a good cleaning effect is achieved, and the problems that the object to be cleaned is deposited and the positions close to dead angles on two sides of a washing cavity of a cleaning tank are easy to clean dead angles due to insufficient water flow washing force can be effectively avoided.

Further, the annular flow passage has at least three spray holes on each side of the barrier wall separation, and the distance between a spray hole adjacent to the barrier wall and the barrier wall is smaller than the distance between other adjacent spray holes. The distance between the spraying holes adjacent to the baffle wall and the baffle wall is small, so that water flow which can turn back from the baffle wall can be sprayed out of the spraying holes rapidly, so that the object to be cleaned is lifted upwards, and the deposition of the object to be cleaned is avoided. Better, the opening of the orifice of other adjacent spray holes inclines to the same rotation direction, so after the arrangement, the water flow sprayed out from other spray holes can form annular rotation water flow, the acting force is applied to the object to be cleaned, the object to be cleaned can rotate along a certain direction, the object to be cleaned is in a motion state, and therefore the water flow can wash each surface of the object to be cleaned, the cleaning without dead angles is achieved, and the better cleaning effect is achieved.

The spray arm body comprises an upper spray arm and a lower spray arm, the water inlet is arranged in the middle of the lower spray arm, and the spray hole is arranged on the top surface of the upper spray arm.

Further, the inner annular wall of the O-shaped annular flow passage forms a central hole.

The utility model provides a cleaning machine with the spray arm for solving a second technical problem, which is characterized in that: the ultrasonic wave generating device is arranged below the central hole. The ultrasonic wave generating device can emit relatively uniform ultrasonic waves, and a relatively good cleaning effect is further obtained.

Compared with the prior art, the utility model has the advantages that the O-shaped annular flow passages at the two sides of the spray arm body are respectively positioned at the two sides of the water inlet, so that the water flow spray pressure at the two ends of the spray arm body can be effectively enhanced and balanced, the problem of weak turbulence intensity caused by unbalanced suction force of objects to be cleaned and different lengths of the diversion channels due to water pump offset is avoided, the cross section area of the O-shaped annular flow passages is large, the water pump quantity is reduced, the water flow spray pressure at the two ends of the spray arm can be balanced under the condition that the water pump power is not increased, and the turbulence intensity is kept not weakened, so that the cleaning effect is improved.

Drawings

FIG. 1 is a schematic view of a spray arm according to an embodiment of the present utility model;

FIG. 2 is a schematic view of the structure of the upper shower arm according to an embodiment of the present utility model;

FIG. 3 is a cross-sectional view of a sump body according to an embodiment of the utility model.

Detailed Description

The utility model is described in further detail below with reference to the embodiments of the drawings.

Referring to fig. 1 to 3, the washer of the present utility model is designed to be particularly suitable for a sink type washer having an elongated sink, particularly for washing fruits and vegetables, but may be applied to a general sink type washer, as well as a front-opening European type washer and a drawer type washer, in fact.

The following description will be made by taking a fruit and vegetable cleaning machine as an example:

the fruit and vegetable cleaning machine comprises a washing cavity water tank body 100, a water pump 8 and a spray arm, wherein the water pump 8 is arranged at the bottom of the water tank body, the spray arm is used as a water outlet component of the water pump 8, and water pumped by the water pump 8 is sprayed out to clean fruits and vegetables and the like to be cleaned in the water tank body 9. In the present utility model, it is preferable that the tub body is formed in a long and narrow shape, thereby not only being better adapted to the space of the user's kitchen (to be matched with other tub), but also saving water with respect to a square tub.

The water pump 8 is disposed at the middle position of the bottom of the water tank body 100, the water pump 8 includes a motor and an impeller, the impeller includes a hollow shaft with a terminal connected to an output shaft of the motor and a plurality of blades uniformly distributed on the shaft circumference and extending along the axial direction, wherein the motor is disposed below the bottom of the water tank body, and the impeller is disposed in the bottom of the water tank body, in this embodiment, preferably, a water inlet of the water pump 810 is disposed below (lower water inlet) the impeller 101, and the water inlet corresponds to a water inlet on the spray arm, and water flows upward from the bottom, and the structure of the water pump 8 is the same as that of the applicant's chinese patent No. 201610110965.5 or 201310752573.5, and will not be repeated herein. A filter screen is arranged between the lower part of the spray arm and the water pump 8 to isolate dirt from entering the water pump 8 and prevent the spray arm from being blocked.

The ultrasonic wave generating device 7 is arranged on two sides of the water pump 8 of the water tank body, the water draining device and the water draining valve are further arranged at the bottom of the water tank body, and dirty water after cleaning can be drained through the water draining device and the water draining valve. The basin body is internally provided with a vegetable basket for placing fruits and vegetables to be cleaned, the upper end edge of the vegetable basket is placed on the inner side wall of the upper end of the basin body, and the bottom of the vegetable basket is positioned above the spray arm, the ultrasonic generating device 7 and the drainer.

In order to adopt only one water pump 8 in the middle of a long and narrow water tank body 100, and still balance the water flow spraying pressure at two ends of a spray arm under the condition of not increasing the power of the water pump 8 and keep the turbulence intensity not weakened, the spray arm comprises a spray arm body 1, the periphery of the spray arm body 1 is provided with a convex wall 11 to surround and form a flow channel, the top surface of the spray arm body 1 is provided with a spray hole communicated with the flow channel, the flow channel comprises a pressurizing flow channel 2 with the middle adjacent to a water inlet and communicated with the water inlet and O-shaped annular flow channels positioned at two sides of the pressurizing flow channel 2 and communicated with the pressurizing flow channel 2, and as the structures of the two O-shaped annular flow channels are similar to be in a center symmetrical graph, the left O-shaped annular flow channel is taken as an example in the following description for convenience of description.

The spray arm body 1 can be integrally injection molded, and can be arranged into two parts which are connected in an upper-lower split manner for reducing the difficulty in addition. The spray arm body 1 comprises an upper spray arm 12 and a lower spray arm 13, a water inlet is formed in the middle of the lower spray arm 13, and spray holes are formed in the top surface of the upper spray arm. The pressurizing flow channel 2 comprises a first side wall 21 and a second side wall 22 which are opposite, the first side wall 21 and the second side wall 22 comprise an arc AB, an arc BC and an arc CD which are formed by smooth transition connection, and the radius ratio of the arc AB, the arc BC and the arc CD is R1: r2: r3= (20-35): (15-20): (60-100), the end of the arc CD is in transitional connection with the convex wall 11, which is preferable in the scheme shown in the figure, i.e. on the projection view of the upper spray arm 12, the ratio of the radii of the arc AB, BC and CD is R1: r2: because the radius of the arc BC is suddenly smaller than that of the arc AB, the first side wall 21 forms an inflection point at the arc BC section and forms a diversion opening of the diversion channel together with the second side wall 22, so that a larger pressure can be applied to the water flow, and an acceleration is provided for the water flow entering the O-shaped annular flow channel, therefore, the water flow spraying pressure at the two ends of the spray arm can be balanced under the condition that the number of the water pumps 8 is reduced and the power of the water pumps 8 is not increased, the turbulence intensity is kept not weakened to improve the cleaning effect, and the radius of the arc CD is larger than that of the arc AB, so that the water flow can more smoothly enter the diversion flow channel after being accelerated, and the vortex at the diversion opening can be further reduced.

In addition, in order to enhance the cleaning effect, the two sides of the water pump 8 of the water tank body 100 are provided with ultrasonic generating devices 7, correspondingly, in a central hole 3 formed by the inner ring wall of the O-shaped annular flow passage of the spray arm arranged on the ultrasonic generating devices 7, one end of the spray arm body 1 inwards extends to form a baffle wall 4 propped against the outer wall of the central hole 3, the tail end of the O-shaped annular flow passage is separated by the baffle wall 4 to prevent water flow intersection and undershoot and influence water outlet pressure, the hole wall of the central hole 3 upwards extends to form an inner ring convex wall 31, a first side surface of the inner ring convex wall 31, the inner side surface of the convex wall 11 and the baffle wall 4 jointly form a first sub-flow passage 5, a second side surface of the first inner ring convex wall 31, the inner side surface of the convex wall 11 and the baffle wall 4 jointly form a second sub-flow passage 6, the spray hole comprises a first spray hole corresponding to the first flow dividing passage and a second spray hole corresponding to the second flow dividing passage, the number of the first spray holes and the second spray holes is 4 respectively, if the number is too large, the phenomenon of weakening of the spray pressure of the water flow is easy to cause, turbulence and weak spray effect are caused, if the number is too small, the spray cleaning range is easy to cause, 4 are used for unfolding and describing, namely, a spray hole I10, a spray hole II 20, a spray hole III 30 and a spray hole IV 40, a spray hole V50, a spray hole VI 60, a spray hole V70 and a spray hole V80 respectively, wherein the distance between the spray hole IV 40 and the spray hole V80 and the baffle wall 4 is smaller than the distance between other adjacent spray holes, and the spray holes are inclined upwards at a certain angle with the horizontal direction, preferably 30-60 degrees, the angle of the spray hole IV 40 and the spray hole V80 is arranged to enable the water flow returning from the baffle wall 4 to spray out from the tangential direction of the spray holes adjacent to the baffle wall 4 so as to upwards hold fruits and vegetables and avoid the deposition, while also avoiding loss of energy from this portion of the water flow. The opening directions of the spray hole 10, the spray hole second 20, the spray hole third 30, the spray hole fifth 50, the spray hole sixth 60 and the spray hole seventh 70 all face the same rotation direction, so that water flow sprayed from the first spray hole and the second spray hole forms annular water flow, acting force is applied to fruits and vegetables, the fruits and vegetables can rotate in a certain direction in the vegetable basket, and the fruits and vegetables are in a motion state relative to the sink body and the water flow, so that the water flow can wash each surface of the fruits and vegetables to be cleaned, and the cleaning without dead angles is achieved, and a better cleaning effect is achieved.

In addition, the cross section area of the O-shaped annular flow passage is gradually reduced from the upstream to the downstream along the water flow direction. The sectional area of the annular flow channel is gradually reduced from the upstream to the downstream, so that the flow velocity of the water flow is large at the downstream with small sectional area, and the flow velocity of the water flow is small at the upstream with large sectional area, and according to the Bernoulli principle, the larger the flow velocity of the fluid, the smaller the pressure, the smaller the flow velocity of the fluid and the larger the pressure; like this spray arm body spray hole spray water can follow the big upper reaches of pressure to press to the low reaches of pressure, for this, spray arm body 1 downstream spray hole spun water pressure just can be big with waiting to wash the fruit vegetables and upwards hold up, wait to wash the fruit vegetables and all be in motion, from this rivers can wash each surface of waiting to wash the fruit vegetables, reach the cleanness at no dead angle, obtain better cleaning performance, can effectively avoid waiting to wash the deposit of fruit vegetables like this and avoid being close to the problem that the cleaning dead angle appears because of the dynamics that rivers washed the dead angle is not enough easily in the position of washing tank washing chamber both sides dead angle.

Because the fruit and vegetable cleaning machine adopts the spray arm structure, when in cleaning, water enters from the lower spray arm 13 and passes through the special pressurizing flow channel 2, the water flow pumps are led to the O-shaped annular flow channels on the two sides, the annular flow channels of each O-shaped are smoothly transited, the water pressure stability is ensured, the O-shaped annular flow channels further comprise two sub-flow channels, the spray pressure of each beam of water flow is controlled to be consistent, the end parts of the flow channels are separated by the baffle wall 4, and the water flow intersection hedging is prevented, so that the water outlet pressure is influenced. The left spray arm and the right spray arm rotate in the same direction in water, turbulence is respectively formed, turbulence is enhanced, fruits and vegetables are rolled vigorously, so that more omnibearing cleaning is realized, the cleaning effect which can be achieved by adopting two water pumps 8 and two spray arms is achieved, the phenomenon that local positions are not washed cleanly is avoided, and the water quantity can be saved.

Claims

1. The spray arm comprises a spray arm body, wherein the spray arm body is hollow and is provided with a flow channel, the central part of the bottom of the spray arm body is provided with a water inlet communicated with the flow channel, and the wall surface of the spray arm body is provided with spray holes communicated with the flow channel; along the water flow direction, the annular flow channel is separated at the far end positioned at the downstream by at least one baffle wall; the sectional area of the annular flow channel gradually decreases from upstream to downstream along the water flow direction; the spray arm body comprises an upper spray arm and a lower spray arm, the water inlet is arranged in the middle of the lower spray arm, and the spray hole is arranged on the top surface of the upper spray arm.

2. The spray arm of claim 1, wherein: the annular flow passage is provided with at least three spray holes on each side of the separation of the baffle wall, and the distance between the spray holes adjacent to the baffle wall and the baffle wall is smaller than the distance between other adjacent spray holes.

3. The spray arm of claim 1, wherein: the inner ring wall of the O-shaped annular flow passage forms a central hole.

4. A cleaning machine employing the spray arm of claim 3, wherein: the ultrasonic wave generating device is arranged below the central hole.