CN109394116B - Spray arm and cleaning machine applying same - Google Patents

Abstract

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

Description

Spray arm and cleaning machine applying same

Technical Field

The utility model relates to the field of household dish washing machines, in particular to a spray arm for a cleaning machine and the cleaning machine using the spray arm.

Background

With the increasing level of living of people, dish washers are increasingly entering home as household electrical appliances for kitchen use. The existing dish-washing machines on the market are generally divided into three types of a desk type dish-washing machine, a cabinet type dish-washing machine and a trough type dish-washing machine, wherein the desk type dish-washing machine is of an integral independent structure and is generally placed on a desk for use; the cabinet type dish washer is also an independent structure, but needs to be embedded into a kitchen cabinet for use; the tub dishwasher is combined with a tub and is generally installed in a kitchen cabinet.

The dish washing machines of the above-mentioned various forms generally achieve the cleaning effect by lifting water by a water pump and spraying the water to fruits and vegetables in a cleaning space. For example, the chinese patent with application number CN97236119.7, i.e. a microcomputer light-operated full-automatic dish washer, and the chinese patent with application number CN00240098.7, i.e. a dish washer, all disclose similar structures, in which the impact force of water flow to fruits and vegetables is weak and not uniform enough, and when fruits and vegetables are more, they cannot be covered by water flow, resulting in poor cleaning effect. The chinese patent CN200710306898.5, which relates to a dish washer, especially a household dish washer, with a device for improving decontamination effect, provides a vaporizing device for generating a fluid mist that can be introduced into a cavity of the dish washer, so as to enlarge a cleaning area of fruits and vegetables and improve uniformity of cleaning media, but the structure still cannot solve the problem of weak impact force of sprayed water flow. For this reason, the applicant has made a series of improvements to the washing machine with dish washing function, such as ZL201310749864.9 "sink-type washing machine", ZL201310750968.1 "sink-type washing machine", which uses the rotary spray arm disposed at the bottom of the sink body as the water spraying means to connect with the water pump, the water pump sucks the water in the sink body and then sprays the water from the spray arm to wash the object to be washed, and chinese application (a sink-type washing machine) such as 201610110963.6 (publication No. CN105662300 a) discloses such a whole H-type, the split flow passage includes a lateral split flow passage in the middle and vertical split flow passages at both sides, respectively, which biases the water pump at the bottom of the sink body, such as one end of the length direction of the sink body, since the water pump is smaller to the other end of the sink body or near the fruit and vegetable in the length direction of the other end, and a device for collecting the residue is easy to be added at the other end; in a fruit and vegetable washer, in order to equalize the suction force of two ends of the spray arms to fruits and vegetables, chinese patent No. CN206239254U of the applicant's ZL201621100369.0 discloses such a fruit and vegetable washer 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 from the two spray arms are 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; however, two spray arms of two water pumps are required, and therefore, further improvement is required, and meanwhile, only a single rotary spray arm is adopted to clean objects (fruits and vegetables or fruits and vegetables) to be cleaned, so that dead angles can not be washed by water flow sprayed from the rotary spray arm.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a spray arm capable of enhancing the cleaning effect of the spray arm.

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 runner, the spray arm body is provided with a water inlet communicated with the runner at the central part of the bottom, and the wall surface of the spray arm body is provided with spray holes communicated with the runner.

In order to take account of the volume of the spray arm and to take account of the fact that air bubbles are generated when water introduced from the water inlet is not influenced into the flow channels on both sides and at the same time water introduced from the water inlet is able to enter the flow channels on both sides, the volume of the air bubble generating device is preferably not too great, preferably the air bubble generating device comprises a housing in whose inner space an impeller is rotatably arranged, and the inflow end face and the outflow end face of the housing are each provided with an orifice plate and/or at least one grid structure or mesh structure. The water flow is foamed through the orifice plate and/or the grid structure or the net structure of the inflow end face and drives the impeller to rotate, the rotation of the impeller accelerates the water flow and increases or mixes air in the water in the acceleration rotation process until the water flow is decelerated through the orifice plate and/or the grid structure or the net structure of the outflow end face, and then the water which is foamed again after being mixed with the air can flow out of the outflow end face and finally enters the spray arm flow channel.

In order to increase the content of bubbles and improve the cleaning effect, the wall surface of the spray arm body is also provided with a bubble nozzle which can generate secondary bubbles after generating bubbles from the bubble generating device. The water flow sprayed from the bubble generating device is subjected to secondary bubble formation, and continuous water flow becomes discontinuous water flow after the secondary bubble is formed due to the existence of the primary bubble, so that the other water flow striking force is formed, and the cleaning capability is improved.

Preferably, the bubble nozzle comprises an annular shell wall, the top surface of the annular shell wall is provided with water holes, the bottom surface of the annular shell wall is sleeved with at least one pore plate and/or at least one grid structure or net structure at intervals, and the sectional area of the water holes is smaller than that of the pore plate and/or the at least one grid structure or net structure. In this way, after the water is foamed by the bubble generating device, the water flows out from the water through holes at a speed after being foamed again through the pore plate and/or the grid structure or the net structure of the inflow end face of the bubble nozzle, so that negative pressure is generated on the outflow side of the water through holes, surrounding air is sucked and mixed to generate water flow with a large amount of bubbles, the sprayed water flow is rich in bubbles, when the sprayed water flow reaches the surface of a cleaning object to be cleaned, the bubbles are broken, impact force is formed again, and dirt on the surface of the cleaning object is stripped together with the water flow.

The flow channels are respectively arranged on two sides of the water inlet, so that the water flow spray pressure at two ends of the spray arm body can be effectively enhanced and balanced, and the flow channels can be annular flow channels in O shapes or radioactive flow channels.

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. Therefore, the water pressure sprayed out of the spraying holes at the downstream of the spray arm body can greatly lift the object to be cleaned upwards, and the object to be cleaned is in a motion state, so that water flow can wash each surface of the object to be cleaned, the object to be cleaned can be cleaned without dead angles, a better cleaning effect is achieved, and the problems that the object to be cleaned is deposited and the positions close to the dead angles at two sides of the washing cavity of the cleaning tank are easy to be cleaned 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.

Further, the opening directions of the other adjacent spray holes face the same rotation direction, so that the water flow sprayed from the annular flow channel forms annular water flow. The openings of the spray holes of other adjacent spray holes incline towards the same rotating direction, after the spray holes are arranged, water flow sprayed from other spray holes can form annular rotating water flow, 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 moving state, and therefore the water flow can wash each surface of the object to be cleaned, and the object to be cleaned can be cleaned without dead angles, and a better cleaning effect is achieved.

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

Further, the spray arm body comprises an upper spray arm and a lower spray arm, the water inlet is formed in the middle of the lower spray arm, and the spray holes are formed in the top surface of the upper spray arm.

The utility model provides a cleaning machine applying the spray arm for solving a second technical problem, which is characterized in that: the washing device comprises a washing cavity, wherein an ultrasonic generating device is arranged at the bottom of the washing cavity, and the ultrasonic generating device is positioned 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 bubble generating device is arranged at the upstream position of each flow channel, so that bubbles can be generated when water flows into channels from the water inlet, water mixed with a large amount of bubbles is sprayed onto cleaning objects from the spray holes on the spray arm body, the water can be broken to generate instantaneous air burst phenomenon so as to form radioactive impact force, the area and probability of directly flushing the cleaning objects are increased, the cleaning speed is further increased, the existence of spray dead angles of the spray arms is effectively avoided, the cleaning rate of the spray arms is improved, the cleaning effect is effectively enhanced, the flow channels are arranged at the two sides of the water inlet, 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 the cleaning objects and different lengths of the shunt channels due to water pump bias is avoided, meanwhile, the cleaning machine also has the turbulence cleaning function, when the water level is higher, the air burst phenomenon mixed with the bubbles is formed, the turbulence force formed by the air burst of the air burst is increased, the impact force and the friction force generated in unit volume is greatly increased, the situation that the air burst force is high, and the cleaning effect is achieved under any situation that the surfactant is not used, and the cleaning effect is realized.

Drawings

FIG. 1 is a schematic view showing a structure of a cleaning machine according to an embodiment 1 of the present utility model;

FIG. 2 is a cross-sectional view of FIG. 1;

fig. 3 is a schematic structural view of a lower spray arm in the spray arm according to embodiment 1 of the present utility model;

FIG. 4 is a schematic diagram showing the structure of a bubble generating apparatus according to embodiment 1 of the present utility model;

FIG. 5 is a schematic view showing the structure of a bubble nozzle in embodiment 1 of the present utility model;

FIG. 6 is a schematic view of the exploded structure of FIG. 5;

fig. 7 is a schematic structural view of a lower spray arm in the spray arm according to embodiment 2 of the present utility model.

Detailed Description

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

Example 1

Referring to fig. 1 to 6, 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 water tank body 100, a water pump 101 and a spray arm, wherein the water pump 101 is arranged at the bottom of the water tank body 100, the spray arm is used as a water outlet component of the water pump, and water pumped by the water pump 101 is sprayed out to clean fruits and vegetables and the like to be cleaned in the water tank body 100. In the present utility model, it is preferable that the tub body 100 is formed in a long and narrow shape, thereby not only being better adapted to the space of a user's kitchen (to be matched with other tub), but also saving water with respect to a square tub.

The water pump 101 is disposed at the middle position of the bottom of the water tank body 100, the water pump comprises a motor and an impeller, the impeller comprises a hollow shaft with the tail end connected with an output shaft of the motor and a plurality of blades which are uniformly distributed on the peripheral surface of the shaft and extend along the axial direction, wherein the motor is located below the bottom of the water tank body 100, and the impeller is located in the bottom of the water tank body. A filter screen is arranged between the lower part of the spray arm and the water pump to isolate dirt from entering the water pump and prevent the spray arm from being blocked.

The ultrasonic wave generating device 103 is arranged on two sides of the water pump of the water tank body, the drainer and the drain valve are also arranged at the bottom of the water tank body 100, and dirty water after cleaning can be discharged through the drainer and the drain valve. The water tank body 100 is also internally provided with a cleaning basket for placing fruits and vegetables to be cleaned, the upper end edge of the cleaning basket is placed on the inner side wall of the upper end of the water tank body, and the bottom of the cleaning basket is positioned above the spray arm, the ultrasonic generating device and the drainer.

In order to adopt only one water pump 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 and keep the turbulence intensity not weakened, the spray arm comprises a spray arm body 1, the spray arm body 1 is hollow and is provided with a flow channel 2, the spray arm body 1 is provided with a water inlet communicated with the flow channel at the central position of the bottom, the wall surface of the spray arm body 1 is provided with two spray holes communicated with the flow channel, the flow channels are respectively positioned at two sides of the water inlet, and a bubble generating device 9 is arranged at the upstream position of each flow channel and used for generating bubbles of water introduced from the water inlet; in order to take account of the volume of the spray arm and to take account of the fact that the flow of water introduced from the water inlet is not affected into the flow channels on both sides and also to cause bubbles to be generated when water introduced from the water inlet is introduced into the flow channels on both sides, the volume of the bubble generating device is preferably not excessively large, the bubble generating device 9 comprises a housing 91, an impeller 92 is rotatably provided in the inner cavity of the housing 91, an inlet end face and an outlet end face of the housing 91 are respectively provided with a honeycomb-shaped orifice plate or grid structure or a mesh structure 93, the mesh structure 93 is taken as an example, the water flow is foamed through the mesh structure 93 of the inlet end face and drives the impeller 92 to rotate, and the rotation of the impeller 92 accelerates the water flow and increases or mixes air in the water in the process of accelerating rotation until the orifice plate passing through the outlet end face decelerates, i.e. the water which is mixed with the air and then foamed again finally enters the spray arm flow channel 2.

In order to increase the bubble content and thus to improve the cleaning effect, the wall surface of the spray arm body 1 is further provided with a bubble nozzle 90 which can generate secondary bubbles again after generating bubbles from the bubble generating device 9 so as to carry out secondary bubbling on water flow sprayed from the bubble generating device 9, and the continuous water flow becomes discontinuous water flow after the secondary bubbles due to the existence of primary bubbles, so that another water flow striking force is formed, and the cleaning capability is improved. Preferably, the air bubble nozzle 90 comprises an annular shell wall 901, a water through hole 902 is arranged on the top surface of the annular shell wall 901, a layer of pore plate 904 with hexagonal holes and a layer of net structure 903 are sleeved on the bottom surface of the annular shell wall 901 at intervals, the cross section area of the water through hole 902 is smaller than that of the pore plate 904 and the net structure 903, so that water after being foamed by the air bubble generating device 9 flows out of the water through hole after being foamed again through the pore plate 904 and the net structure 903 on the inflow end surface of the air bubble nozzle 90, so that negative pressure is generated on the outflow side of the water through hole, surrounding air is sucked and mixed to generate water flow with a large number of bubbles, and the sprayed water flow is rich in bubbles, so that when the water flow reaches the surface of a cleaning object to be cleaned, the bubbles are broken, impact force is formed again, and dirt on the surface of the object to be cleaned is stripped together with the water flow.

In this embodiment, the flow channels are described by expanding the flow channels in an O-shape, and because the two flow channels have similar structures and are in a center symmetrical pattern, for convenience of description, the left flow channel is taken as an example in the following 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. Wherein, spray arm body 1 is including last spray arm 12 and lower spray arm 13, and the water inlet is established at the middle part of lower spray arm 13, and the spray hole then sets up the top surface of last spray arm 12. In addition, in order to enhance the cleaning effect, the water pump 101 of the water tank body 100 is provided with an ultrasonic generator 103 at both sides, a central hole 3 formed by the inner ring wall of the O-shaped annular flow passage of the spray arm correspondingly arranged on the ultrasonic generator 103, the periphery of the spray arm body 1 is provided with a convex wall 11 to surround and form a flow passage, one end of the spray arm body 1 is inwards extended with a baffle wall 4 which is abutted 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 from crossing and opposite to impact water outlet pressure, the wall of the central hole 3 is upwards extended to form an inner ring convex wall 31, a first side surface of the inner ring convex wall 31 and 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 and the inner side surface of the convex wall 11 and the baffle wall 4 jointly form a second sub flow passage 6, the spray holes comprise a first spray hole and a second spray hole corresponding to the first diversion channel, the number of the first spray hole and the second spray hole is 4 respectively, if the number is too large, the phenomenon of weakening of the spray pressure of 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 be small, 4 spray holes are respectively described as a first spray hole 10, a second spray hole 20, a third spray hole 30 and a fourth spray hole 40, a fifth spray hole 50, a sixth spray hole 60, a seventh spray hole 70 and an eighth spray hole 80, wherein the distance between the fourth spray hole 40 and the eighth spray hole 80 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 arrangement of the fourth spray holes 40 and the eighth spray holes 80 can enable the water flow turned back from the baffle wall 4 to be sprayed from the tangential direction of the adjacent baffle wall spray holes, the bubble generating device is arranged at the upstream position of each runner, so that water flowing into the runners from the water inlet can generate bubbles, the water mixed with a large amount of bubbles is sprayed onto the surfaces of fruits and vegetables from the spray holes on the spray arm body, and can be broken to generate instant air explosion phenomenon so as to form radioactive impact force, the area and probability of directly washing fruits and vegetables are increased, the cleaning speed is further increased, the existence of spray dead angles of the spray arm is effectively avoided, the cleaning rate of the spray arm is improved, the cleaning effect is effectively enhanced, when the water level is higher, the water mixed with bubbles sprayed from the opening directions of the spray holes I10, II, III, 50, 60 and seven 70 of the spray arm are formed with turbulence, the turbulence mixed with bubbles can be washed to the air explosion force formed by the fruits and vegetables to be cleaned, the impact force and the friction force generated in unit volume are greatly increased, and the good cleaning effect is achieved even under the condition that any surfactant or detergent is not used, and the cleaning effect is more omnibearing. 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 cross section area of the annular flow channel is gradually reduced from the upstream to the downstream, so that the flow velocity of water flow is large at the downstream with small cross section area, and the flow velocity of water flow is small at the upstream with large cross section area.

According to the fruit and vegetable cleaning machine disclosed by the utility model, due to the adoption of the spray arm structure, fruits and vegetables to be cleaned are placed in the cleaning basket of the water tank body during cleaning, water flows through the bubble generating device and the bubble nozzle which are positioned at the upstream of the flow passage, a large amount of bubbles are generated, the water flow with the bubbles is sprayed out from the spray arm spray holes, when the sprayed water flow reaches the surfaces of fruits and vegetables to be cleaned due to the fact that the bubbles are rich in the bubbles, the bubbles are broken, impact force is formed again, dirt on the surfaces of the fruits and vegetables is stripped together with the water flow, the bubble nozzle at the upper part of the spray arm is used for carrying out secondary bubbling on the sprayed water flow, the bubble implosion effect is not stopped, and the irregular fruits and vegetables are difficult to touch by fingers on the surfaces of the fruits and vegetables, such as granular dirt in fine seams, so that dead angles which cannot be cleaned do not exist are avoided, in addition, the water flow is pumped to the annular flow passages of O-shaped at two sides through the water inlet of the spray arm 13 to ensure stable water pressure, each O-shaped annular flow passage comprises two sub-flow passages, namely the first sub-flow passages 21 and the second sub-flow passages 22, the pressure is controlled, and the pressure of each O-shaped annular flow passage is prevented from being crossed at the tail ends of the water flow, and the water flow is prevented from flowing out from the end of the water flow. The left spray arm and the right spray arm rotate in the same direction in water, turbulence is respectively formed, and the turbulence is enhanced, so that the more omnibearing cleaning is realized, the phenomenon that the local position is not washed cleanly is avoided, and the water quantity can be saved.

Example 2

Substantially similar to the structure of example 1, the difference is that: as shown in fig. 7, the flow channel is a radial flow channel, i.e. is divided into three sub-flow channels, namely a third sub-flow channel 103, a fourth sub-flow channel 104 and a fifth sub-flow channel 105, and at least three spraying holes are formed on the corresponding wall surface of each sub-flow channel to control the spraying pressure of each sub-flow channel to be consistent.

Claims (11)

1. The utility model provides a spray arm, includes spray arm body, spray arm body inside cavity just is formed with the runner, spray arm body open in bottom central part with the water inlet that the runner is linked together, seted up on the wall of spray arm body with the spraying hole that the runner is linked together, its characterized in that has two at least, is located respectively the both sides of water inlet to be provided with bubble generating device in the upstream position of each runner for make follow the water that the water inlet was introduced produces the bubble, spray arm body is including last spray arm (12) and lower spray arm (13), the middle part at lower spray arm (13) is established to the water inlet, spray hole then set up the top surface of last spray arm (12).

2. The spray arm of claim 1, wherein: the bubble generating device comprises a shell, wherein an impeller is rotatably arranged in an inner cavity of the shell, and an orifice plate and/or at least one grid structure or net structure are respectively arranged on an inflow end face and an outflow end face of the shell.

3. The spray arm of claim 1 or 2, wherein: the wall surface of the spray arm body is also provided with a bubble nozzle which can generate secondary bubbles after generating bubbles from the bubble generating device.

4. A spray arm according to claim 3, wherein: the bubble nozzle comprises an annular shell wall, at least one orifice plate and/or at least one grid structure or net structure is sleeved on the inflow end face of the annular shell wall at intervals, water through holes are formed in the outflow end face of the annular shell wall, and the sectional area of each water through hole is smaller than that of the orifice plate and/or the at least one grid structure or net structure.

5. The spray arm of claim 1, wherein: the flow channel is an O-shaped annular flow channel or a radioactive flow channel.

6. The spray arm of claim 5, wherein: the annular flow passage is blocked at a downstream distal end by at least one blocking wall in the direction of water flow.

7. The spray arm of claim 5, wherein: the cross-sectional area of the annular flow passage gradually decreases from upstream to downstream along the water flow direction.

8. The spray arm of claim 6, 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.

9. The spray arm of claim 8, wherein: the opening directions of the other adjacent spray holes face the same rotation direction, so that the water flow sprayed from the annular flow channel forms annular water flow.

10. The spray arm of claim 5, wherein: the inner ring wall of the O-shaped annular flow passage forms a central hole.

11. A cleaning machine employing the spray arm of claim 10, wherein: the washing device comprises a washing cavity, wherein an ultrasonic generating device is arranged at the bottom of the washing cavity, and the ultrasonic generating device is positioned below the central hole.