JP2005307823A - Pump and dish washer with the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pump preventing occurrence of a dead space inside a cabinet of a dishwasher even when a cabinet is provided therein. <P>SOLUTION: A casing 12 of the pump 10 has a housing chamber 18 and a discharging chamber 20. A water flow face 62 for having water flow from the housing chamber 18 to the discharging chamber 20 is formed on the upper face of a bottom plate 14 of the casing 12. A suction port 22 is opened on the bottom face of the housing chamber 18, and from the center thereof, a fixed shaft 28 is provided in a standing manner. An impeller 32 and a rotor 40 are rotatably arranged to the fixed shaft 28 through a bearing metal 30. A stator 44 is arranged on the outside of the casing 12, on the outer peripheral side of the rotor 40, and a hole for air bleeding is opened on the upper face of the housing chamber 18. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a pump used in a dishwasher.

  The dishwasher pump has a washing function that pumps wash water to the nozzle and cleans the dishes, etc., and a discharge function that discharges dirty water that has been contaminated by washing dishes to the outside of the dishwasher cabinet. These functions are switched by normal rotation and reverse rotation of the motor.

For example, a dishwasher pump disclosed in Patent Document 1 is disposed at the bottom of a cabinet of a dishwasher, and an output shaft of a pump motor is disposed in a horizontal direction, and an impeller attached to the output shaft is vertically disposed. By rotating in the direction, the cleaning water sucked from the suction port is sprayed onto the tableware stored in the cabinet for cleaning.
JP 2003-286998 A

  In the dishwasher pump as described above, since the impeller rotates in the vertical direction, there is a problem that a lot of dead space is generated at the bottom of the cabinet.

  Therefore, in view of the above problems, the present invention provides a pump that does not generate a dead space inside a cabinet even when it is provided in a cabinet of a dishwasher.

  The invention according to claim 1 has a motor in which a suction port is provided in a bottom plate of a casing of a pump, a single discharge port is provided in the casing, an impeller is arranged inside the casing, and the impeller is rotated. In the pump, the casing has a storage chamber for storing the rotor of the motor and the impeller, the suction port is opened at a bottom surface of the storage chamber, and a fixed shaft is erected from a substantially center of the suction port. The rotor is rotatably arranged with respect to the fixed shaft via a bearing, the impeller is integrated with a lower portion of the rotor, and the ring-shaped stator of the motor is disposed outside the casing. The pump is characterized in that it is arranged on an outer peripheral portion of a storage portion in which the rotor is stored, and an air vent hole is opened at an upper portion of the storage chamber.

  The invention according to claim 2 is provided with one suction port on the bottom plate of the casing of the pump, a first discharge port is provided on one side of the casing, and a second discharge port is provided on the other side of the casing, In the pump having an impeller disposed inside the casing and having a motor for normal rotation or reverse rotation of the impeller, the casing has a storage chamber for accommodating the rotor of the motor and the impeller, and the suction port Is opened to the bottom surface of the storage chamber, a fixed shaft is erected from substantially the center of the suction port, the rotor is rotatably arranged with respect to the fixed shaft via a bearing, and the impeller is connected to the rotor. The ring-shaped stator of the motor is arranged on the outer periphery of the storage part outside the casing and in which the rotor is stored, and an air vent hole is formed in the upper part of the storage chamber. Open and The water flowing from the storage chamber inside single first discharge port or a pump, characterized in that the switching valve to flow into the second discharge port are provided.

  The invention according to claim 3 is provided with one suction port on the bottom plate of the casing of the pump, the first discharge port is provided on one side surface of the casing, and the second discharge port is provided on the other side surface of the casing, In the pump having an impeller disposed inside the casing and having a motor for normal rotation or reverse rotation of the impeller, the casing includes a rotor for the motor, a storage chamber for storing the impeller, and the first discharge port. And a discharge chamber provided with the second discharge port, a flowing water surface for allowing water to flow from the storage chamber to the discharge chamber is formed on the upper surface of the bottom plate of the casing, and the suction port is the storage chamber The fixed shaft is erected from substantially the center of the suction port, the rotor is rotatably arranged via a bearing with respect to the fixed shaft, and the impeller is integrated with the lower portion of the rotor And said Rotating on the water surface, sucking water from the suction port and flowing it to the discharge chamber, the ring-shaped stator of the motor is outside the casing and on the outer peripheral part of the storage part in which the rotor is stored An air vent hole is formed in the upper portion of the storage chamber, and a switching valve for flowing water flowing from the storage chamber to the first discharge port or the second discharge port is provided in the discharge chamber. A pump characterized by being provided.

  According to a fourth aspect of the present invention, an annular flow path is formed in the outer peripheral portion of the impeller in the storage chamber, one end of the switching valve is rotatably attached to a valve rotation shaft, and the valve rotation shaft is The water that is arranged on the tangent line of the annular flow path and flows through the annular flow path by the forward rotation of the impeller hits the other end of the switching valve, rotates the switching valve, and the first Opening the discharge port and closing the second discharge port, the water flowing through the annular flow path by reversing the impeller hits the other end of the switching valve, rotating the switching valve, The pump according to claim 3, wherein the second discharge port is opened and the first discharge port is closed.

  The invention according to claim 5 is the pump according to claim 3, wherein packings are respectively arranged at edges of the first discharge port and the second discharge port.

  The invention according to claim 6 is the pump according to claim 3, wherein packings are respectively arranged on the switching valves corresponding to the first discharge port and the second discharge port.

  The invention according to claim 7 is the pump according to at least one of claims 1 to 6, wherein the stator is molded by a mold resin.

  The invention according to claim 8 is the pump according to at least one of claims 1 to 6, wherein the motor is a brushless DC motor.

  According to a ninth aspect of the present invention, the pump according to at least one of the second to sixth aspects is provided at the bottom of a cabinet of a dishwasher, and washing water and drainage are stored at the bottom of the cabinet, and the stored water is stored. The dishwasher is characterized in that fresh water is sucked from the suction port, the first discharge port is connected to the wash port, and the second discharge port is connected to the drain port.

  In the pump according to the first to third aspects of the invention, the impeller rotates in the horizontal direction with respect to the vertical rotation shaft, and the suction port is provided on the bottom surface of the casing. In addition, the space for installing this pump can be reduced. In particular, since the water to be sucked under the pump can be stored, the installation is easy. Since the air vent hole opens in the upper part of the storage chamber, air easily escapes and water tends to accumulate in the storage chamber. And since water spreads also to a storage chamber, the burning and abnormal wear by the idle driving of the sliding surface of a fixed shaft and an impeller can be prevented, and the cooling effect of a motor can be acquired.

  In the pump according to the fourth aspect of the present invention, the switching valve can be switched simply by rotating the impeller forward or backward, and water can be discharged from the first discharge port or the second discharge port.

  In the pump according to the fifth aspect of the present invention, since the packings are respectively provided at the bases of the first discharge port and the second discharge port, water leakage does not occur when these discharge ports are closed by the switching valve.

  In the pump of the invention according to claim 6, since the packing is provided in the switching valve, no water leakage occurs when the first discharge port or the second discharge port is closed.

  In the pump of the invention according to claim 7, even if the stator is disposed outside the casing, it is covered with the mold resin, so that a waterproof effect can be obtained, and vibration and noise can be reduced.

  In the pump according to the eighth aspect, since the impeller is rotated by the brushless DC motor, the forward rotation and the reverse rotation can be easily performed, and the variable speed can be easily performed.

  In the dishwasher according to the ninth aspect of the present invention, washing water is stored at the bottom of the cabinet, and by arranging the pump above this, the pump can be efficiently arranged inside the cabinet, and the dead space is eliminated. be able to.

(First embodiment)
Hereinafter, the pump 10 of the dishwasher 100 which is the 1st Embodiment of this invention is demonstrated based on FIGS. 1-4.

(1) Structure of Pump 10 The structure of the pump 10 will be described with reference to FIGS.

  A casing 12 of the pump 10 is made of a synthetic resin, and includes a bottom plate 14 and a casing body 16 that covers the bottom plate 14. The planar shape of the casing 12 is a shape in which a triangular portion protrudes from a disk shape, and is divided into a cylindrical storage chamber 18 and a planar triangular discharge chamber 20. The bottom plate 14 also has a shape corresponding to the casing 12.

  A circular suction port 22 is opened at a central portion corresponding to the storage chamber 18 of the bottom plate 14. The lower end of the suction port 22 protrudes to form a flange, and the edge of the suction port 22 forms a bell mouth. Three support pieces 24 protrude from the edge of the suction port 22 toward the center every 120 °, and a dish-like shaft support portion 26 is provided at the center of the three support pieces 24. The lower end of the fixed shaft 28 is fitted to the shaft support portion 26, and the fixed shaft 28 is erected in the vertical direction. The upper end portion of the fixed shaft 28 is fitted to the upper surface of the storage chamber 18 in the casing body 16. Accordingly, the fixed shaft 28 is fixed in a state of being sandwiched between the casing body 16 and the shaft support portion 26.

  An impeller 32 is disposed on the fixed shaft 28 via a bearing metal 30. In the impeller 32, six blades 36 are arranged at predetermined intervals on a ring-shaped substrate 34 having an open central portion, and the blades 36 are inclined with respect to the radial direction. The position at which the impeller 32 is provided is slightly above the bottom plate 14, and the open center of the impeller 32 is inserted into the bell mouth of the suction port 22.

  A rotor 40 of a motor 38 is fixed to the upper part of the impeller 32. The rotor 40 is formed by alternately forming S-pole and N-pole permanent magnets in a ring shape. The integrated impeller 32 and the rotor 40 are stored in the cylindrical storage chamber 18. An air vent hole 42 is opened on the upper surface of the storage chamber 18.

  A ring-shaped stator 44 is provided outside the storage chamber 18, that is, outside the casing 12. In this stator 44, a ring-shaped stator core 46 is pre-molded with resin to form an insulating layer 48, and a stator winding 50 is wound on the insulating layer. These assembled stators 44 are integrally formed with a mold resin to form a ring shape. The molded stator 44 configured as described above is fitted to the outside of the storage chamber 18, and the stator 44 is disposed at a position outside the rotor 40. The rotor 40 and the stator 44 described above constitute a motor 38, and this motor 38 constitutes a brushless DC motor.

  As shown in FIGS. 1 and 3, an annular channel 52 is provided on the outer peripheral side of the impeller 32, and the discharge chamber 20 is provided continuously from the annular channel 52. The water sucked by the rotation of the impeller 32 from the suction port 22 flows into the discharge chamber 20 along the upper surface of the bottom plate 14 of the storage chamber 18. Hereinafter, the upper surface of the bottom plate 14 is referred to as a flowing water surface 62.

  A valve rotation shaft 54 is provided at a position that intersects in a tangential direction from the opposed position of the annular flow path 52 described above. One end of a triangular switching valve 56 is attached to the valve rotation shaft 54, and the other end of the switching valve 56 rotates. In FIG. 3, a rectifying protrusion 64 having a triangular plane is provided on the lower side of the annular flow path 52 along the outer peripheral surface of the annular flow path 52, and a flow groove 65 is provided in the middle of the rectifying protrusion 64. It has been. A recess 66 is provided at the other end of the triangular switching valve 56 so as to engage with the rectifying protrusion 64. The height of the switching valve 56 is formed to be substantially the same as that of the discharge chamber 20 as shown in FIG. A first discharge port 58 connected to the washing port is opened on one side of the discharge chamber 20, and a second discharge port 60 connected to the drain port is opened on the other side of the discharge chamber 20.

  Packings 68 and 70 are provided at the base of the first discharge port 58 and the base of the second discharge port 60, respectively. When the switching valve 56 rotates to one side, the second discharge port 60 is closed through the packing 70 and the first discharge port 58 is opened. When the switching valve 56 rotates to the other side, the first discharge port 58 is closed via the packing 68, and the second discharge port 60 is opened.

(2) Arrangement state of pump 10 in dishwasher 100 Next, the arrangement state of the pump 10 in the dishwasher 100 will be described based on FIG.

  The pump 10 is arranged inside a pump arrangement portion 110 at the bottom of the cabinet 102 of the dishwasher 100, and the bottom of the cabinet 102 is a storage portion for washing water and drainage. The second discharge port 60 of the pump 10 is connected to the drain port 104, and the drain port 104 extends outside the cabinet 102. The first discharge port 58 is connected to the cleaning port of the cleaning pipe 106 for ejecting cleaning water, and the tip of the cleaning pipe 106 is connected to the ejection device 108 for ejecting cleaning water. The air vent hole 52 is open on the upper surface of the pump placement unit 110.

(3) Operation State of Pump 10 The operation state of the pump 10 arranged in the dishwasher 100 as described above will be described.

  Water is stored in the storage section of the cabinet 102 of the dishwasher 100 with tap water or the like. This water becomes washing water.

  When the motor 38 is rotated in the clockwise direction in FIG. 3, the washing water is sucked from the suction port 22, and the annular flow path 52 is rotated in the clockwise direction to flow through the water flow surface 62, so that the switching valve 56 in FIG. Press down. When the switching valve 56 is pressed downward, it rotates so as to close the second discharge port 60, the first discharge port 58 is opened, and the second discharge port 60 is closed. Then, the washing water is sent from the first discharge port 58 by the rotational force of the impeller 32, and the washing water is ejected from the ejection device 108 in FIG.

  On the other hand, when draining the water accumulated in the storage part of the cabinet 102, when the motor 38 is rotated in the counterclockwise direction in FIG. 3, the water flows into the flow groove 65 in the middle of the rectifying protrusion 64. By pressing the recess 66 of the switching valve 56, the switching valve 56 moves upward to close the first discharge port 58 and open the second discharge port 60. Thereby, water is drained from the second discharge port 60.

  During the operations of the above cleaning and drainage, air is discharged from the air vent hole 42 by the water that has entered from the suction port 22 that is the lower surface of the casing 12, and the entire storage chamber 18 is filled with water. Therefore, seizure and abnormal wear due to idle operation of the sliding surfaces of the fixed shaft 28 and the impeller 32 can be prevented, and the motor 38 has a cooling effect.

  Since packings 68 and 70 are provided at the edges of the bases of the first discharge port 58 and the second discharge port 60, no water leakage occurs when the ports 58 and 60 are closed by the switching valve 56.

  As shown in FIG. 4, water can be stored at the bottom of the cabinet 102, and the pump 10 can be arranged on one side of the cabinet 102, so that the inside of the cabinet 102 can be used effectively and the dead space is reduced. be able to.

  Since the stator 44 is covered with the mold resin, it has a waterproof effect, and even if it is arranged outside the casing 12, its operation is not affected by water.

  Since the motor 38 is a brushless DC motor, the impeller 32 can be rotated forward and backward easily, and the number of rotations can be adjusted.

(Second Embodiment)
The pump 10 of 2nd Embodiment is demonstrated based on FIG.

  The difference between the present embodiment and the first embodiment is that a packing for closing the first discharge port 58 and the second discharge port 60 is provided.

  In the present embodiment, as shown in FIG. 5, packing 68 and 70 are provided on the switching valve 56, respectively, so that the first discharge port 58 and the second discharge port 60 are closed.

  Even in the present embodiment, water leakage does not occur from the first discharge port 58 and the second discharge port 60.

(Third embodiment)
A pump 10 according to a third embodiment will be described with reference to FIGS. 6 and 7.

(1) Structure of the pump 10 The difference between the present embodiment and the first embodiment is the position of the first discharge port 58 and the second discharge port 60.

  In the present embodiment, the valve rotation shaft 54 is provided at a position that intersects the tangential direction from the opposed position of the annular flow path 52 described above. One end of a triangular switching valve 56 is attached to the valve rotation shaft 54, and the other end of the switching valve 56 rotates. In FIG. 7, a rectifying protrusion 80 having a triangular plane is provided on the upper side of the annular flow path 52 along the outer peripheral surface of the annular flow path 52. A recess 82 is provided at the other end of the triangular switching valve 56 so as to engage with the rectifying protrusion 80. A discharge port 58 is opened in the side wall 84 of the casing 12 facing the side surface 94 of the switching valve 56, and the discharge port 58 communicates with a discharge pipe 88 provided at the end of the casing 12. The discharge pipe 88 extends upward. The packing 68 of the switching valve 56 is provided on one side 94 facing the side wall 84 of the casing 12.

  The second discharge port 60 is provided on the side wall 90 of the casing 12 in the annular flow path 52.

(2) Operation State of Pump 10 The operation state of the pump 10 disposed in the dishwasher 100 will be described.

  Water is stored in the storage section of the cabinet 102 of the dishwasher 100 with tap water or the like. This water becomes washing water.

  When the motor 38 is rotated in the clockwise direction in FIG. 7, washing water is sucked from the suction port 22, and the annular flow path 52 is rotated in the clockwise direction to flow through the flowing water surface 62, so that the concave portion 82 of the switching valve 56. Is pressed to push the switching valve 56 downward in FIG. When the switching valve 56 is pressed downward, it rotates so as to close the annular flow path 52 to the second discharge port 60, the first discharge port 58 is opened, and the second discharge port 60 is closed. Then, the wash water is sent from the first discharge port 58 to the discharge pipe 88 by the rotational force of the impeller 32.

  On the other hand, when draining the water accumulated in the storage section of the cabinet 102, when the motor 38 is rotated in the counterclockwise direction in FIG. The first discharge port 58 is closed by moving upward. Thereby, water is drained from the second discharge port 60.

  During the operations of the above cleaning and drainage, air is discharged from the air vent hole 42 by the water that has entered from the suction port 22 that is the lower surface of the casing 12, and the entire storage chamber 18 is filled with water. Therefore, seizure and abnormal wear due to idle operation of the sliding surfaces of the fixed shaft 28 and the impeller 32 can be prevented, and the motor 38 has a cooling effect.

(Fourth embodiment)
A pump 10 according to a fourth embodiment will be described with reference to FIGS. 8 and 9.

  The difference between the present embodiment and the first embodiment is that only one discharge port is provided instead of two, and accordingly, no discharge chamber and switching valve are provided.

  In the present embodiment, one discharge port 98 is provided on the side wall 92 of the casing 12 in the annular flow path 52 described above.

  Even in the pump 10 of the present embodiment, air is discharged from the air vent hole 42 by the water that has entered from the suction port 22 that is the lower surface of the casing 12, and the entire storage chamber 18 is filled with water. Therefore, seizure and abnormal wear due to idle operation of the sliding surfaces of the fixed shaft 28 and the impeller 32 can be prevented, and the motor 38 has a cooling effect.

(Example of change)
The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist thereof.

(1) Modification 1
In the above-described embodiment, the rotor 40 and the impeller 32 are configured separately and then fixed integrally. Alternatively, the impeller 32 and the rotor 40 may be integrally formed with a plastic magnet.

(2) Modification example 2
The material of the switching valve may be made of synthetic resin or rubber.

  The present invention is suitable for a pump for a dishwasher.

It is a longitudinal cross-sectional view of the pump which shows 1st Embodiment. Similarly it is a front view of a pump. It is the sectional view on the AA line in FIG. It is a longitudinal cross-sectional view of the dishwasher of the state which has arrange | positioned the pump. It is a cross-sectional view of the pump of the second embodiment. It is a longitudinal cross-sectional view of the pump which shows 3rd Embodiment. Similarly it is a cross-sectional view of a pump. It is a longitudinal cross-sectional view of the pump which shows 4th Embodiment. Similarly it is a cross-sectional view of a pump.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Pump 12 Casing 14 Bottom plate 16 Casing main body 18 Storage chamber 20 Discharge chamber 22 Suction port 28 Fixed shaft 32 Impeller 38 Motor 40 Rotor 42 Air vent hole 44 Stator 52 Annular flow channel 54 Valve rotating shaft 56 Switching valve 58 1st Discharge port 60 Second discharge port 62 Flow surface 68 Packing 70 Packing 100 Dishwasher 102 Cabinet 104 Drain port 106 Washing pipe 108 Spouting device

Claims (9)

A suction port is provided in the bottom plate of the pump casing,
One discharge port is provided in the casing,
An impeller is arranged inside the casing,
In a pump having a motor for rotating the impeller,
The casing has a storage chamber for storing the rotor of the motor and the impeller,
The suction opening opens to the bottom of the storage chamber;
A fixed shaft is erected from the approximate center of the suction port,
The rotor is arranged rotatably with respect to the fixed shaft via a bearing;
The impeller is integrated with the lower part of the rotor;
The ring-shaped stator of the motor is disposed on the outer peripheral portion of the storage portion outside the casing and in which the rotor is stored,
An air vent hole is opened in the upper part of the storage chamber. One suction port is provided in the bottom plate of the pump casing,
A first discharge port is provided on one side of the casing;
A second discharge port is provided on the other side of the casing;
An impeller is arranged inside the casing,
In a pump having a motor for rotating the impeller forward or backward,
The casing has a storage chamber for storing the rotor of the motor and the impeller,
The suction opening opens to the bottom of the storage chamber;
A fixed shaft is erected from the approximate center of the suction port,
The rotor is arranged rotatably with respect to the fixed shaft via a bearing;
The impeller is integrated with the lower part of the rotor;
The ring-shaped stator of the motor is disposed on the outer peripheral portion of the storage portion outside the casing and in which the rotor is stored,
An air vent hole is opened at the top of the storage chamber,
A switching valve for flowing water flowing from the storage chamber to the first discharge port or the second discharge port is provided inside the casing. One suction port is provided in the bottom plate of the pump casing,
A first discharge port is provided on one side of the casing;
A second discharge port is provided on the other side of the casing;
An impeller is arranged inside the casing,
In a pump having a motor for rotating the impeller forward or backward,
The casing has a storage chamber for storing the rotor of the motor and the impeller, and a discharge chamber provided with the first discharge port and the second discharge port,
A water surface for water to flow from the storage chamber to the discharge chamber is formed on the upper surface of the bottom plate of the casing,
The suction opening opens to the bottom of the storage chamber;
A fixed shaft is erected from the approximate center of the suction port,
The rotor is arranged rotatably with respect to the fixed shaft via a bearing;
The impeller is integrated with the lower part of the rotor, and rotates on the water surface to suck water from the suction port and flow into the discharge chamber;
The ring-shaped stator of the motor is disposed on the outer peripheral portion of the storage portion outside the casing and in which the rotor is stored,
An air vent hole is opened at the top of the storage chamber,
The pump characterized in that the discharge chamber is provided with a switching valve for flowing water flowing from the storage chamber to the first discharge port or the second discharge port. An annular channel is formed in the outer periphery of the impeller in the storage chamber,
One end of the switching valve is rotatably attached to a valve rotation shaft, and the valve rotation shaft is disposed on a tangent line of the annular flow path,
When the impeller rotates forward, the water flowing through the annular channel hits the other end of the switching valve, rotates the switching valve to open the first discharge port and the second discharge port. Occlude the
When the impeller reverses, the water flowing through the annular flow channel hits the other end of the switching valve, rotates the switching valve, opens the second discharge port, and opens the first discharge port. The pump according to claim 3, wherein the pump is closed. 4. The pump according to claim 3, wherein packings are respectively disposed at edges of the first discharge port and the second discharge port. 5. 4. The pump according to claim 3, wherein packings are respectively disposed on switching valves corresponding to the first discharge port and the second discharge port. 5. The pump according to at least one of claims 1 to 6, wherein the stator is molded by a mold resin. The pump according to at least one of claims 1 to 6, wherein the motor is a brushless DC motor. A pump according to at least one of claims 2 to 6 is provided at the bottom of a dishwasher cabinet,
Wash water and drainage are stored at the bottom of the cabinet,
The stored water is sucked from the suction port,
The first discharge port is connected to a washing port;
The dishwasher, wherein the second discharge port is connected to a drain port.

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