JP2007330319A - Pump and dishwasher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pump by which residual solid food is finely cut and mixed into washing water or contaminated water so as to easily pass through a dishwasher, and smoothly discharged with the contaminated water to the outside the dishwasher. <P>SOLUTION: The pump 1 for the dishwasher includes a motor portion 10 rotatably disposed with a rotator 12 having a magnetic body 13 along the inner periphery of a stator 11, and a pump portion 30 having a water inlet 31, washing water delivery port 32, and a contaminated water outlet 33, with an impeller 40 connected to the rotator 12 disposed so as to face an opening portion of the water inlet 31. In the pump 1, a plurality of cutting blades 42 rotating with the impeller 40 and disposed in the form of the impeller are provided so as to be protruded from blades 41 of the impeller 40 and face the opening of the water inlet 31. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a pump and a dishwasher using the pump, and more particularly to a pump that can finely cut solid matter such as food bowls mixed in sewage after dishwashing and smoothly discharge it outside the dishwasher. Is.

Conventionally, as a pump used in a dishwasher, in order to inject washing water into a washing tank for washing dishes, and to discharge sewage after washing out of the apparatus, the pump is used in accordance with the rotation direction of the motor. There is a pump that can control the direction of water flow or select one of the wash water discharge port and the sewage discharge port using a switching valve to supply the wash water to the dishwashing tank or drain the sewage after washing. (For example, Patent Document 1).
JP 2000-333896 A

  By the way, in the pump as described in the above document, because solid residues such as vegetables and meat attached to the dishes are mixed in the washing water and the sewage after washing the dishes, it circulates in the pump and the dishwasher. This residue may remain attached to the inside of the pump, the dishwashing tank, and the washing water circulation path.

  These residues are clogged in the pump or entangled with the impeller, impeding smooth cleaning and drainage functions, increasing the rotational resistance of the impeller, causing the pump to become unrotatable or damaged, and causing the motor to burn, etc. There is a problem that the pump becomes unusable.

  In addition, the cleaning performance deteriorates due to the mixing of residues in the washing water, and therefore, the residues remaining in the dishwasher must be removed before washing, before cleaning in the dishwashing tank and inserting the dishes. There were also problems in terms of maintenance and work handling such as pre-washing with water.

  The present invention is intended to solve these problems, and the solid food residue is cut into fine pieces and mixed into washing water and sewage so that it can easily pass through the dishwasher. An object of the present invention is to provide a pump capable of smoothly discharging the residue together with sewage to the outside of the dishwasher.

  The invention according to claim 1 is a pump characterized by having a cutting blade that rotates together with the impeller.

  The invention of claim 2 includes a motor unit in which a rotor having a magnetic body is rotatably disposed along an inner periphery of a stator, a water suction port, a washing water discharge port, and a sewage discharge port, and the rotation The impeller connected to the child is composed of a pump unit disposed to face the opening of the water inlet, and a plurality of cutting blades that rotate with the rotation of the impeller face the opening of the water inlet. It has in the said pump part, It is a pump of Claim 1 characterized by the above-mentioned.

  The invention according to claim 3 is the pump according to claim 2, wherein the plurality of cutting blades are arranged in an impeller shape.

  The invention according to claim 4 is the pump according to claim 3, wherein the plurality of cutting blades are provided so as to protrude from the blades of the impeller.

  The invention according to claim 5 is the pump according to claim 4, wherein the blades of the impeller are formed by cutting blades.

  Invention of Claim 6 is the dishwasher which used the pump in any one of Claims 1-5 for supply of the washing water to a dishwashing tank, and discharge | emission of waste water after washing | cleaning.

  According to the pump of the present invention, when the solid residue contained in the washing water or sewage sucked from the water suction port passes while being caught in the rotating impeller, it is finely divided by the plurality of cutting blades that rotate simultaneously. Since it is cut and mixed into washing water and sewage, it does not remain attached to the inside of the pump, the dish washing tank, and the circulation path of the washing water, and can be discharged to the outside of the dishwasher together with the sewage during drainage operation. Thereby, the dishwasher of this invention does not raise | generate the failure of a pump or a washability fall, and it becomes possible to make cleaning of a dishwashing tank and preliminary washing unnecessary before washing | cleaning of tableware.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a cross-sectional view showing the main structure of the pump 1 of the embodiment, and FIG. 2 is a plan view of the impeller of the pump of FIG.

  The pump 1 includes a motor unit 10 in which a rotor 12 having a magnetic body 13 is rotatably arranged on an inner periphery of a stator 11, a water suction port 31, a washing water discharge port 32 connected to a dishwashing tank, and sewage. And a pump section 30 having a pump chamber 34 for housing the impeller 40 connected to the rotor 12.

  The motor unit 10 constitutes a brushless DC motor, and includes a rotor 12 that is rotatably disposed at the center of the motor unit 10 and a stator 11 that is disposed along the outer periphery of the rotor 12.

  The rotor 12 is formed by connecting a permanent magnet 13 arranged around a rotating shaft 14 to the rotating shaft 14 via a connecting portion 15 in a ring shape, and the rotating shaft 14 is provided at the upper and lower portions. The bearings 16 and 17 are rotatably arranged at the center of the motor unit 10.

  The stator 11 includes a laminated iron core 18 and a winding 19 wound around the laminated core 18. A circuit board 21 for driving the motor is disposed below the stator 11, and the entire stator 11 is molded by a mold resin 22. Has been.

  In the pump unit 30, one end of the rotating shaft 14 is supported by a bearing 35 built in the center of the casing 36, protrudes into the casing 36, and includes a plurality of blades 41 attached to the tip of the rotating shaft 14. A vehicle 40 faces the opening of the water inlet 31 and is housed in the pump chamber 34.

  The motor unit 10 and the pump unit 30 are integrally connected to form the pump 1.

  As shown in the figure, the impeller 40 has a plurality of blades 41 (eight in the figure) having an arcuate cross section arranged at equal intervals in an impeller shape. A cutting blade 42 is inclined and fixed at the tip of each blade 41 with its cutting edge directed in the rotational direction of the impeller 40.

  The cutting blade 42 is a sharp blade made of high carbon steel having a thickness of 0.1 to 1 mm. For example, the cutting blade 42 can be embedded and molded integrally with the blade when the resin blade 41 is formed.

  In the pump 1, the impeller 40 is rotated by the drive of the motor unit 10, the washing water or the sewage is sucked into the pump chamber 34 from the water storage unit of the dishwasher, and is switched by a solenoid valve for switching the water supply path that operates according to the operation mode. A valve (not shown) is operated so that washing water is supplied from the washing water discharge port 32 to the dishwasher of the dishwasher during the dishwashing operation, or wastewater is discharged from the wastewater discharge port 33 during the drainage operation. It has become.

  During operation of the pump 1, washing water is sucked from the water inlet 31 by the rotation of the impeller 40, and at the same time, solid residue such as vegetables and meat contained in the sucked washing water and sewage is absorbed by the water inlet 31. It is finely cut by the cutting blade 42 that rotates in opposition to the opening and mixed into the water. As a result, the residue flows smoothly with the wash water, etc. inside the pump, the dishwashing tank, and the circulation path, and does not get entangled with the impeller or adhere to the washing tank or the circulation path. At the same time, it is connected to the sewage discharge port 33 and can be discharged out of the dishwasher from the water pipe.

  In the figure, a plurality of cutting blades 42 are provided on the water inlet 31 side of the impeller 41. However, depending on the structure of the pump chamber 34 and the shape of the impeller 40 or the blade 41, the cutting blade 42 may be impeller. 40 may be provided on the side opposite to the water absorption port.

  Moreover, the some cutting blade 42 may be provided in the both sides of the water inlet side of the impeller 40, and a counter water inlet side.

  Moreover, as shown in the figure, the cutting blades 42 do not need to be provided on all the blades 41, and may be provided alternately on every other blade 41, for example.

  A plurality of cutting blades 42 may be provided between the blades 41.

  In addition, by forming the cutting blade 42 with a reinforced resin such as FRP or FRM, it can be manufactured integrally with the blade 41 or integrally with the impeller 40 and the blade 41, thereby reducing the number of parts and the number of assembly steps. Can be reduced.

  The pump of the present invention is suitable as a dishwasher pump.

It is sectional drawing of the pump of embodiment. It is a top view of the impeller of a pump same as the above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Pump 10 ... Motor part 11 ... Stator 12 ... Rotor 13 ... Magnetic body 30 ... Pump part 31 ... Water intake 32 ... Washing water discharge port 33 ... Waste water discharge port 40 ... Impeller 41 …… blade 42 …… cutting blade

Claims (6)

A pump characterized by having a cutting blade that rotates together with the impeller. A motor unit in which a rotor having a magnetic body is rotatably arranged along the inner periphery of the stator;
It has a water suction port, a washing water discharge port, and a sewage discharge port, and an impeller connected to the rotor is composed of a pump unit arranged facing the opening of the water suction port,
The pump according to claim 1, further comprising: a plurality of cutting blades that rotate together with the rotation of the impeller in the pump unit facing the opening of the water inlet. The pump according to claim 2, wherein the plurality of cutting blades are arranged in an impeller shape. The pump according to claim 3, wherein the plurality of cutting blades are provided so as to protrude from the blades of the impeller. The pump according to claim 4, wherein a blade of the impeller is formed by a cutting blade. A dishwasher using the pump according to any one of claims 1 to 5 for supplying washing water to a dishwashing tank and discharging sewage after washing.

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