JP2008038743A - Pump and dish washer mounted with this pump - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pump superior in drainage efficiency and responsiveness of a switching valve, and a dish washer mounted with this pump. <P>SOLUTION: This switching valve 40 has a first receiving part 42 having a cover part 41 blocking up a second outflow port 30c, a second receiving part 43 formed at an angle different from the first receiving part 42, and a guide part 45 connecting these parts. A water flow receiving part 43a is formed so as to extend more than a connecting position of the guide part 45 and the second receiving part 43. The switching valve 40 performs opening operation of the second outflow port 30c by receiving water in a flow passage 11 by the second receiving part 43 and the water flow receiving part 43a. In this opening operation, the second receiving part 43 partially enters the inside of the flow passage 11. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a pump including a switching valve that performs opening operation and closing operation of a predetermined outlet depending on a flowing direction, and a fluid device such as a dishwasher equipped with the pump.

  The dishwasher pump has a washing water outlet in one pump, a washing water drain that is soiled by washing, and a switching valve that opens the outlet or drain in response to normal or reverse rotation of the motor. (For example, see Patent Document 1 as an example of a dishwasher pump having such a conventional switching valve).

  The structure of a conventional dishwasher pump as disclosed in Patent Document 1, particularly the structure of the pump chamber, will be described with reference to FIGS. 10 and 11 are schematic plan views of the pump chamber 2 of the conventional dishwasher pump 1 as seen from above. FIG. 10 shows a state where the outlet 6 is closed by the switching valve 5, and FIG. 11 shows a state where the drain port 7 is closed by the switching valve 5.

  Referring to FIGS. 10 and 11, the pump chamber 2 in the dishwasher pump 1 includes an impeller 3 that generates a swirling water flow by rotating, a rectifying table 4 that determines a flow of cleaning water, and a rectifying table 4. A substantially trapezoidal switching valve 5 that is arranged adjacently and rotates in an arc around a predetermined axis, an outflow port 6 that discharges the cleaning water in the pump chamber 2, and a drain port that drains the cleaning water in the pump chamber 2 7.

  The switching valve 5 rotates about the predetermined axis J2 by the force of the water flow of the washing water and performs the functions of the opening operation and the closing operation of the outlet 6 and the drain 7 respectively. And since a water flow direction changes with the rotation directions of the impeller 3, the switching valve 5 changes a rotation direction in connection with it. When the impeller 3 is rotated counterclockwise as shown in FIG. 10, the switching valve 5 receives the force of the washing water flow and rotates clockwise to close the drain port 7. When the impeller 3 is rotated clockwise as shown in FIG. 11, the switching valve 5 receives the force of the washing water flow and rotates counterclockwise to close the outlet 6.

JP 2000-333896 A

  However, in the conventional dishwasher pump 1, since the switching valve 5 functions to open and close both the outlet 6 and the drain 7, the outlet 6 and the drain 7 are connected to the switching valve 5. Must be placed in a position where it can rotate and close. Therefore, the arrangement design of the outlet 6 and the drain 7 is greatly restricted, and the design freedom is lost.

  Moreover, since the flow path 7a until it flows to the drain port 7 is narrowly formed, the flow rate of the cleaning water flowing to the drain port 7 decreases, and the drainage efficiency decreases.

  Furthermore, in the operation of moving the switching valve 5 clockwise from the state in which the outlet 6 is closed to open, the water flow acts on the side opposite to the rotation direction with respect to the rotation of the switching valve 5. Does not work well. As a result, the responsiveness of the switching operation of the switching valve 5 is degraded. For this reason, the cleaning efficiency at which the cleaning water flows to the outlet 6 is reduced.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a pump having good drainage efficiency and responsiveness of a switching valve, and a device such as a dishwasher equipped with this pump.

  In the pump of the present invention, the switching valve is provided in the switching chamber portion in the pump chamber, and the movement of the switching valve is controlled by the direction of the water flow generated by the rotation of the impeller. Then, when the switching valve rotates so as to open the second outlet with respect to the spiral flow path provided outside the impeller, a part of the switching valve enters the flow path. Further, in a state where the switching valve closes the second outlet, the switching valve does not enter the flow path but stays in the switching chamber. With this structure, when water is allowed to flow to the first outlet, the switching valve does not interfere with the flow path, so that water can efficiently flow to the first outlet. When flowing water to the second outlet, a part of the switching valve enters the flow path, so that the flow path and the switching valve interfere with each other, and more water can flow to the second outlet. .

  According to claim 1 of the present invention, a pump having a pump chamber having one inlet and at least two outlets, the pump chamber is disposed in the pump chamber so as to be rotatable forward and backward, and is rotated to rotate the inlet. An impeller that absorbs water from the pump chamber and generates a water flow in the pump chamber, and a motor that rotates the impeller. The pump chamber has a spiral flow path positioned radially outside the impeller, A switching chamber portion formed in a recessed shape adjacent to a part of the two outlets, and the first outlet of the two outlets is formed by the rotation of water in the pump chamber in a predetermined rotational direction of the impeller. A water flow in the same direction is generated and communicated with a part of the flow path so as to be discharged from the flow path, and the other second outflow port of the two outflow ports is configured such that the water in the pump chamber is supplied to the impeller. In a direction opposite to the predetermined rotation direction. A water flow in the same direction is generated by rolling and communicated with the switching chamber so as to be discharged from the flow path through the switching chamber, and the switching chamber has a predetermined shaft for opening and closing the second outlet. A switching valve that rotates in the center is disposed, and the switching valve receives the water flow in the flow path, thereby closing the second outlet when the water flow is in the predetermined direction and opening the water flow in the reverse direction. A receiving portion that is operated so that the rotation trajectory of the receiving portion is formed so as to enter the outer peripheral side of the water channel, and in a state where the second outlet is closed, Features.

  According to claim 1 of the present invention, in the state where the second outlet is closed, the switching valve does not enter the flow path and becomes outside the flow path, so that when switching the water to the first outlet, the switching is performed. It is possible to prevent the valve from interfering with the water flow in the flow path. Therefore, water can be efficiently flowed to the first outlet. And when opening a 2nd outflow port, when a part of switching valve enters in a flow path, the assistance which rotates so that the switching valve opens the force of the water flow in a flow path can be performed. Therefore, the responsiveness of the switching valve can be improved.

  According to claim 2 of the present invention, according to claim 1, the switching valve opens and closes the second outlet by rotating with respect to a predetermined axis, and closes the second outlet. And a first receiving portion that is formed integrally with or separate from the lid portion and that assists in rotating the switching valve to open the second outlet by receiving the water flow in the reverse direction. A second surface that has a different angle from the first receiving portion and that assists in rotating the switching valve so as to close the second outlet by receiving at least a water flow in the predetermined rotation direction. A receiving portion, and a guide portion that is formed between the first receiving portion and the second receiving portion and guides the water flow.

  According to claim 2 of the present invention, by providing the first receiving portion and the second receiving portion, the switching valve assists the operation of opening the second outlet according to the direction of the water flow and closes the second outlet. Operation assistance can be performed. In addition, since the water flow is guided by the guide portion, the water colliding with the switching valve from the flow path can be rectified. Therefore, the loss which generate | occur | produces by the collision with a switching valve can be prevented.

  According to a third aspect of the present invention, according to the second aspect, the second receiving portion and the guide portion are connected to each other, and the second receiving portion includes a water flow receiving portion protruding from a connection position with the guide portion. The water flow receiving portion receives the water flow guided from the guide portion when the switching valve opens the second outlet.

  According to claim 3 of the present invention, by providing the water flow receiving portion that receives the water guided by the guide portion, the second receiving portion can also receive the reverse water flow. Therefore, similarly to the first receiving part, the second receiving part can assist the operation of the switching valve opening the second outlet. As a result, the responsiveness of the switching valve can be improved.

  According to a fourth aspect of the present invention, according to any one of the second and third aspects, when the switching valve opens the second outflow port, at least one of the first receiving portion and the guide portion. One of them moves into the flow path.

  According to claim 4 of the present invention, the first receiving part and the guide part move into the flow path, whereby the water flow in the flow path interferes with the first receiving part and the guide part. Therefore, the operation of the switching valve opening the second outlet can be assisted. As a result, the responsiveness of the switching valve can be improved.

  According to a fifth aspect of the present invention, according to any one of the second to fourth aspects, the first receiving portion and the second receiving portion are disposed closer to the predetermined rotation shaft than the guide portion of the switching valve. A rib for connecting the portions is formed.

  According to Claim 5 of this invention, the intensity | strength of a switching valve can be improved by providing a rib between a 1st receiving part and a 2nd receiving part.

  According to a sixth aspect of the present invention, according to any one of the second to fifth aspects, at least the first receiving portion, the second receiving portion, and the guide portion of the switching valve are integrally formed of a resin material. It is characterized by being molded.

  According to claim 6 of the present invention, the number of parts can be reduced by integrally forming the first receiving portion, the second receiving portion, and the guide portion of the switching valve with a resin material.

  According to a seventh aspect of the present invention, according to any one of the second to seventh aspects, the second receiving portion is located at a position facing the second receiving portion on the inner peripheral wall forming the outer periphery of the flow path. A concave shape that is recessed in a direction away from the end portion that does not hinder movement of the end portion farthest from the predetermined axis of the portion is formed.

  According to claim 7 of the present invention, the flow connected to the switching chamber connected to the flow path is formed by forming a concave shape at a position facing the second receiving portion of the inner peripheral wall forming the outer periphery of the flow path. The circumferential width with respect to the road can be reduced. Therefore, the inner peripheral wall can form a flow path longer.

  According to an eighth aspect of the present invention, in accordance with any one of the first to seventh aspects, at least a part of the guide portion forms a part of the flow path.

  According to claim 8 of the present invention, the guide portion forms part of the flow path, so that the water flow that collides with the switching valve in the flow path can flow in the same manner as the flow path. In particular, when water flows in a predetermined rotation direction, it is possible to prevent the occurrence of loss caused by the collision with the switching valve in the flow path. Therefore, water can be flowed to the first outlet more efficiently.

  According to a ninth aspect of the present invention, according to any one of the first to eighth aspects, the water flow is switched to the inner circumferential wall adjacent to the switching valve in the flow path in the reverse water flow. An inner peripheral plane portion that is a plane facing the valve is formed.

  According to claim 9 of the present invention, by forming the inner peripheral plane portion, the water flow in the reverse direction can efficiently flow to the switching chamber portion and the second outlet.

  According to a tenth aspect of the present invention, according to any one of the first to ninth aspects, the switching valve and an inner peripheral wall adjacent to the switching valve of the pump chamber are provided near the second outlet. Even when the switching valve closes the second outlet, the gap is provided with a predetermined width, and in the reverse water flow, the gap is connected to the second outlet. An outward outlet channel is formed.

  According to the tenth aspect of the present invention, by forming the outlet channel in the gap between the switching valve and the inner peripheral wall, when the switching valve moves from the closed state of the second outlet to the operation of opening the second outlet, The operation of opening the switching valve can be assisted by water entering the outlet channel. Therefore, the responsiveness of the switching valve can be improved.

According to Claim 11 of this invention, it is a dishwasher which wash | cleans tableware, Comprising: The pump in any one of Claims 1 thru | or 10, the tableware tray which mounts the said tableware, and the said tableware A jetting device for jetting water, and a cleaning pipe connecting the pump and the jetting device,
The first outlet is a cleaning port connected to the previous cleaning pipe, and the second outlet is a drain port for draining water in the dishwasher to the outside.

  According to the eleventh aspect of the present invention, it is possible to provide a dishwasher capable of efficiently flowing water to the ejection device and having high drainage efficiency.

  ADVANTAGE OF THE INVENTION According to this invention, apparatuses, such as a drainage efficiency and the responsiveness of a switching valve, and a dishwasher which mounts this pump can be provided.

<Overall structure of pump>
A structure of an embodiment of the pump of the present invention will be described with reference to FIG. FIG. 1 is a schematic cross-sectional view of an embodiment of the pump of the present invention cut in the axial direction.

  With reference to FIG. 1, the pump includes a pump chamber 10, and a motor 20 including a rotating portion 24 accommodated in the pump chamber 10 and a fixing portion 22 adjacent to the pump chamber 10.

  The motor 20 is disposed on the outer peripheral surface side of the first casing 21 formed in a substantially bottomed cylindrical shape, and is disposed on the inner peripheral surface side of the first casing 21. And a rotating part 24 having a rotor magnet 27 that rotates around the rotation axis J1.

  The fixing portion 22 includes a stator core 22a1 formed by laminating a plurality of thin electromagnetic steel plates each formed of an annular core back portion and a plurality of teeth portions extending radially inward from the core back portion, and teeth of the stator core 22a1. A stator 22a composed of a coil 22a2 formed by winding a plurality of conductive wires on the part, and a circuit arranged on the lower side in the axial direction of the stator 22a and connecting the conductive wires to achieve electrical continuity And a substrate 22b. Then, the stator 22a and the circuit board 22b are molded in the resin by the mold resin 22c. By molding the stator 22a and the circuit board 22b in the mold resin 22c, the water resistance and electrical insulation of the motor unit 20 can be improved. The circuit board 22b is mounted with a control IC that detects and controls the rotational position of the rotating unit 24 by measuring the counter electromotive force of the coil 22a2.

  A connector 22d that enables electrical connection to the outside is integrally molded on the outer peripheral side of the fixing portion 22 with a molding resin 22c. The connector 22d is also electrically connected to the circuit board 22b.

  A projection 21a1 that is coaxial with the rotation axis J1 and extends upward in the axial direction is formed on the bottom portion 21a that is formed on the lowermost side in the axial direction of the first casing 21. A concave portion 21a2 is formed in the upper portion of the protrusion 21a1 so as to open coaxially with the rotation axis J1 and toward the upper side in the axial direction. A shaft 23 that is coaxial with the rotation axis J1 is fixed to the recess 21a2.

  The rotating portion 24 is inserted into the shaft 23 and is disposed so as to be opposed to each other with a minute gap in the radial direction. The rotating portion 24 is integrally formed with the sleeve 25 and fixes the substantially cylindrical rotor magnet 27. And a base portion 26. The outer peripheral surface of the rotor magnet 27 is disposed so as to face the inner peripheral surface of the tooth portion of the stator 22a with a small gap in the radial direction. The cylindrical portion 21a of the first casing 21 is disposed in the gap. The cylindrical portion 21a isolates the rotor magnet 27 and the stator 22a, thereby preventing liquid such as water from entering the fixed portion 22 side.

  The base portion 26 has a substantially L-shaped magnet fixing portion 26 a for fixing the rotor magnet 27, and a cylindrical sleeve fixing portion 26 b that is continuously formed with the magnet fixing portion 26 a and is fixed to the outer peripheral surface of the sleeve 25. Is provided. A plurality of blades 28 are formed at equal intervals in the circumferential direction on the opposite side of the rotor magnet 27 in the axial direction, that is, on the upper surface of the magnet fixing portion 26a. The blade 28 has an L-shaped cross section, and the upper portion of the blade 28 is formed on the upper side in the axial direction from the sleeve fixing portion 26b, and is fixed by a blade holding portion 26c formed in a substantially cylindrical shape on the upper side in the axial direction. Here, the base part 26 and the blade | wing 28 are shape | molded integrally. In the present invention, a state in which the base portion 26 and the blades 28 are integrally formed is referred to as an impeller 29.

  A second casing 30 is formed on the upper side in the axial direction of the first casing 21 so as to accommodate the base 26 and the blades 28. A pump chamber 10 is formed by a space surrounded by the first casing 21 and the second casing 30.

  The second casing 30 has an inlet 30a for supplying water from the outside into the pump chamber 10 and a first outlet 30b (not shown in FIG. 1) that is two outlets for discharging the water in the pump chamber 10 to the outside. And a second outlet 30c. A switching valve 40 that performs an opening operation and a closing operation of the second outlet 30c is disposed in the vicinity of the second outlet 30c.

<Pump room>
Next, the structure of the pump chamber 10 will be described with reference to FIG. FIG. 2 is a schematic plan view of the pump chamber 10 as viewed from above.

  Referring to FIG. 2, the pump chamber 10 is disposed on the spiral flow path 11 formed between the radially outer side of the impeller 29 and the inner wall of the pump chamber 10, and is disposed outside the flow path 11. And a switching chamber portion 12 in which the switching valve 40 formed in a recessed shape is disposed.

  The channel 11 is formed in a shape in which the channel width is gradually increased clockwise. And the flow path 11 is connected with the 1st outflow port 30b in the position where the flow path width became the maximum. The outer periphery of the flow path 11 is formed by the inner wall portion of the second casing 30. Two inner wall portions are formed across the switching chamber 12 in the flow path 11. A substantially arc-shaped first inner wall portion 30 d is provided at a position where the flow passage width of the flow passage 11 is narrow, and a second inner wall portion 30 e is provided at a position where the flow passage width of the flow passage 11 is wide. The second inner wall portion 30e is configured by a substantially planar shape and a substantially arc shape.

  The switching chamber 12 is formed in a concave shape on the radially outer side from the flow path 11. And the switching chamber part 12 is connected with the 2nd outflow port 30c.

<Switching valve>
Next, the structure of the switching valve 40 will be described with reference to FIG. FIG. 3A is a schematic plan view of the switching valve 40 as viewed from above, and FIG. 3B is a schematic plan view of the lid as viewed from the front.

  Referring to a) of FIG. 3, the switching valve 40 includes a lid portion 41 that closes the second outlet 30c, a first receiving portion 42 that is integrally formed with the lid portion 41 and has a substantially plate shape, The second receiving portion 43 disposed at an angle different from that of the one receiving portion 42, the first receiving portion 42 and the second receiving portion 43, and the projection 44 serving as the rotation axis of the switching valve 40, and the first receiving portion And a guide part 45 formed between the circumferential direction of the part 42 and the second receiving part 43. The protrusion 44 includes a lower protrusion 44a and an upper protrusion 44b that engage with the first casing 21 and the second casing 30, respectively (see FIG. 3b). The switching valve 40 is provided by integrally molding a portion other than the lid portion 41 with a resin material.

  The guide surface 45 is disposed so as to connect the first receiving portion 42 and the second receiving portion 43, connects the first receiving portion 42, the second receiving portion 43 and the guide portion 45, and has a substantially triangular shape when viewed from above. Become.

  A stepped portion 42 a that is recessed toward the guide portion 45 is formed at a position where it is connected to the guide portion 45 on the radially outer side of the first receiving portion 42.

  The second receiving portion 43 is formed with a water flow receiving portion 43 a that extends radially outward from the connecting portion with the guide portion 45. The water flow receiving portion 43 a is formed so as to extend perpendicular to the inclined surface of the guide portion 45. Thereby, the force of the water that flows along the guide portion 45 can be efficiently converted into the rotation operation of the switching valve 40.

  Between the radial direction of the guide part 45 and the protrusion 44, the rib 46 which connects the 1st receiving part 42 and the 2nd receiving part 43 is formed. By providing the rib 46, the strength of the first receiving portion 42 and the second receiving portion 43 can be maintained by the rib 46 without filling the radial direction between the guide portion 45 and the protrusion 44 with a resin material. Can do. Therefore, the weight of the switching valve 40 can be reduced. As a result, the switching valve 40 can be rotated even with a small water flow, and the responsiveness of the switching valve 40 can be improved.

  Referring to FIG. 3 b, the first receiving portion 42 is formed with a disk-shaped protrusion 42 b. The lid portion 41 is formed in a substantially disk shape having an opening hole 41a at the center. An annular projecting-shaped blocking portion 41 b is formed on the outer peripheral edge of the lid portion 41. The lid portion 41 is fixed to the first receiving portion 42 by engaging the opening hole 41a with the protruding portion 42b.

<Relationship between flow path and switching valve>
Next, with reference to FIG. 4, the arrangement | positioning relationship between the flow path 11 and the switching valve 40 in the switching chamber part 12 vicinity in the state which the switching valve 40 obstruct | occluded the 2nd outflow port 30c is demonstrated. FIG. 4 is an enlarged view of a two-dot chain line circle in FIG. A two-dot chain line arrow in the figure indicates the direction of water flow in the flow path 11.

  With reference to FIG. 4, in a state where the switching valve 40 closes the second outlet 30 c, the first receiving portion 42, the second receiving portion 43, and the guide portion 45 of the switching valve 40 are arranged in the radial direction from the flow path 11. It arrange | positions outside (The outer periphery of the flow path 11 is a dotted-line part of FIG. 4). The guide portion 45 is adjacent to the outer periphery of the flow path 11 and forms a part of the flow path 11. Further, since the first inner peripheral wall 30d constituting the outer periphery of the flow path 11 is not formed at a position where the flow path 11 and the switching chamber section 12 are connected, the water flow in the flow path 11 flows into the switching chamber section 12. . However, since the guide part 45 forms a part of the flow path 11, the water flow flows along the flow path 11 by colliding with the guide part 45, and thus can flow efficiently to the first outlet 30 b.

  The outer peripheral portion of the first receiving portion 42 of the switching valve 40 faces the inner peripheral flat surface portion 30e1 formed in a substantially planar shape of the second inner peripheral wall portion 30e via a gap. The end portion of the inner peripheral plane portion 30e1 has a step shape at a position continuous with the switching chamber portion 12. And the step part 42a formed in the 1st receiving part 42 of the switching valve 40 is arrange | positioned in the position corresponding to this step shape. Therefore, the outlet flow path 50 toward the second outlet 30c is formed by the inner peripheral plane portion 30e1 and the stepped portion 42a.

<Water flow direction and switching valve operation>
Next, the operation of the switching valve 40 and the water flow depending on the water flow direction of the flow path 11 will be described with reference to FIGS. FIG. 5 is a schematic plan view showing the switching valve 40 in the direction of water flow flowing through the first outlet 30b, and FIGS. 6 to 8 show the switching valve 40 in the direction of water flowing through the second outlet 30c. It is the shown schematic top view. 6 shows a state in which the opening operation of the switching valve 40 is started, FIG. 7 shows a state in the middle of the opening operation of the switching valve 40, and FIG. 8 shows a state in which the switching valve 40 is completely opened. Is shown.

  Referring to FIG. 5, the impeller 29 rotates clockwise (hereinafter, referred to as a forward rotation direction) as indicated by a solid line arrow in the drawing, whereby a water flow in the same direction is generated in the flow path 11. The water flow along the inner peripheral surface of the first inner peripheral wall 30d collides with the guide portion 45 depending on the position where the switching chamber portion 12 and the flow path 11 are connected. Thereby, a water flow is urged | biased in the direction which the guide part 45 obstruct | occludes the 2nd outflow port 30c. That is, a closing operation is performed that rotates clockwise around a predetermined rotation axis J2. A part of the water flow along the inner peripheral surface of the first inner peripheral wall 30d flows so as to enter between the second receiving portion 43 and the first inner peripheral wall 30d in the switching chamber portion 12. Thereby, this part of water flow is urged in a direction in which the second receiving portion 43 closes the second outlet 30c. Therefore, the switching valve 40 can stably close the second outlet 30c when the water flow flows in the forward rotation direction. The surface of the first inner peripheral wall 30d facing the second receiving portion 43 is formed with a concave relief portion 30d1 that does not hinder the movement of the second receiving portion 43 during the opening operation of the switching valve 40. . Thereby, the inner peripheral surface which makes the outer periphery of the flow path 11 in the first inner peripheral wall 30d can be formed longer. Therefore, the water flow in the flow path 11 can be further directed toward the first outlet 30b. Therefore, water can be efficiently flowed through the first outlet 30b.

  With reference to FIG. 6, the impeller 29 rotates counterclockwise (hereinafter referred to as a reverse direction) as indicated by a solid line arrow in the figure, whereby a water flow in the same direction is generated in the flow path 11. Since the water flow along the inner peripheral surface of the second inner peripheral wall 30e is formed in a plane where the second inner peripheral wall 30e faces the switching chamber portion 12, the water flowing along the second inner peripheral wall 30e is changed to the switching chamber portion. It will flow toward 12. Accordingly, a large amount of water flows through the second outlet 30 c formed in the switching chamber 12. As a result, the water in the pump chamber 10 can be efficiently flowed to the second outlet 30c. Moreover, since the flow path which flows toward the switching chamber part 12 is formed by the 2nd inner peripheral wall part 30e, this flow path continues to the outflow channel 50. When water flows through the outlet channel 50, the pressure in the outlet channel 50 increases, and the first receiving portion 42 is biased in the direction in which the switching valve 40 performs the opening operation. Here, the opening operation refers to an operation in which the switching valve 40 rotates in the normal rotation direction around the predetermined axis J2.

  A part of this water flow collides with the guide surface 45 and flows along the inclined surface of the guide surface 45. And the water which flows along the guide surface 45 collides with the water flow receiving part 43a. Therefore, the water flow receiving portion 43a is urged by the collided water in the direction in which the switching valve 40 performs the opening operation. Accordingly, since the water is urged by the two locations of the first receiving portion 42 and the water flow receiving portion 43a so that the switching valve 40 performs the opening operation, the second outlet 30c can be opened with less water. As a result, the responsiveness of the switching valve 40 can be improved.

  Referring to FIG. 7, the switching valve 40 performs an opening operation by the water receiving part 43 a of the first receiving part 42 and the second receiving part 43. During the opening operation, the first receiving portion 42 rotates so as to enter the flow path 11. Thereby, since the water flow in the flow path 11 collides with the 1st receiving part 42, the switching valve 40 can be efficiently rotated.

  Referring to FIG. 8, the switching valve 40 performs a rotation operation until the first receiving portion 42 is substantially perpendicular to the water flow direction of the flow path 11. Thereby, the water which collided with the 1st receiving part 42 goes to the switching chamber part 12, ie, the direction which goes to the 2nd outflow port 30b, and flows. Therefore, the water in the pump chamber 10 can be efficiently flowed to the second outlet 30b.

<Structure of dishwasher>
Next, the structure of an embodiment of the dishwasher of the present invention will be described with reference to FIG. FIG. 9: is the schematic cross section cut in the axial direction which showed one form of the Example of the dishwasher of this invention.

  Referring to FIG. 9, the dishwasher 100 includes a tableware tray 102 on which the tableware 101 can be arranged, an ejection device 103 that ejects water toward the tableware 101, a water storage unit 104 formed at the lower end, A pump 110 disposed substantially at the same position as the bottom of the water storage unit 104, a cleaning pipe 105 that connects the ejection device 103 and the pump 110, and a housing 106 that accommodates these are provided.

  When the pump of the present invention is used as the pump 110, the cleaning pipe 105 is fixed to the first outlet 30b. Further, the water reservoir 104 is fixed to the inflow port 30a. This inflow port 30a becomes a water supply port. The second outlet 30c serves as a drain outlet for draining the water in the water storage section 104 to the outside of the dishwasher 100.

  Next, the cleaning function and draining function of the tableware 101 of the dishwasher 100 will be described.

  First, water is stored in the water storage unit 104 of the dishwasher 100 using tap water or the like. This water becomes washing water.

  In the cleaning function of the tableware 101, by rotating the impeller 29 in the forward rotation direction by the motor 20, the cleaning water is sucked from the inlet 30a from the water storage section 104, flows in the forward direction in the flow path 11, and the switching valve 40 is Perform blocking operation. Thereby, the washing water does not flow to the second outlet 30c but flows to the first outlet 30b. The washing water passes through the washing pipe 105 and is jetted toward the tableware 101 by the jetting device 103.

  On the other hand, in the drainage function of the wash water of the water storage section 104, the impeller 29 is rotated in the reverse direction by the motor 20, so that the wash water flows in the reverse direction and the switching valve 40 performs the opening operation. Thereby, washing water enters the pump chamber 10 from the inlet 30a and is drained from the second outlet 30c. When draining the cleaning water, a part of the cleaning water may flow to the first outlet 30b.

  Here, by using the switching valve 40 of the present invention, in the cleaning function of the tableware 101, the switching valve 40 does not enter the flow path 11, and the guide portion 45 supplies the cleaning water in the flow path 11 to the first level. Since the guide is directed in the direction toward the first outlet 30b, the washing water can be efficiently flowed to the first outlet 30b. Therefore, since wash water can be efficiently flowed to the ejection device 103, the tableware 101 can be washed efficiently. Furthermore, in the drainage function of the wash water of the water storage unit 104, the switching valve 40 performs the opening operation with good responsiveness in the reverse direction of the wash water, so that the wash water can be efficiently flowed to the second outlet 30b.

  As mentioned above, although one form of the Example of the pump of this invention and the dishwasher was demonstrated, this invention is not limited to this Example, A various deformation | transformation is possible within the scope of this patent claim.

  For example, in this embodiment, the pump is applied to the dishwasher, but the pump of the present invention is not limited to being mounted on the dishwasher. For example, the present invention is applied to a device equipped with a pump such as a washing machine.

It is the schematic cross section cut in the axial direction which showed one form of the Example of the pump of this invention. It is the model top view seen from the upper side which showed one form of the Example of the pump chamber of this invention. It is the schematic cross section cut in the axial direction which showed one form of the Example of the switching valve of this invention. FIG. 3 is an enlarged view of a dotted circle in FIG. 2. In the pump chamber of this invention, it is a schematic plan view which shows the water flow at the time of water flowing out to a 1st outflow port. In the pump chamber of this invention, it is the model top view which showed the water flow at the time of water flowing out to a 2nd outflow port, and showed the state at the time of a switching valve starting performing opening operation | movement. In the pump chamber of this invention, it is the model top view which showed the water flow at the time of water flowing out to a 2nd outflow port, and showed the state in the middle of the switching valve opening In the pump chamber of this invention, it is the model top view which showed the water flow at the time of water flowing out to a 2nd outflow port, and showed the state which the switching valve opened completely It is the schematic cross section cut in the axial direction which showed one form of the Example of the dishwasher which mounts the pump of this invention. It is the schematic cross section cut in the axial direction which showed the conventional pump. It is the schematic cross section cut in the axial direction which showed the conventional pump.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Pump chamber 11 Flow path 12 Switching chamber part 20 Motor 29 Impeller 30b First outlet 30c Second outlet 30d First inner peripheral wall 30d1 Escape part 30e Second inner peripheral wall 30e1 Inner peripheral plane part 40 Switching valve 41 Lid part 42 First Receiver (receiver)
43 Second receiving part (receiving part)
43a Water flow receiving portion 45 Guide portion 46 Rib 50 Outlet channel 100 Tableware washing machine 101 Tableware 102 Tableware tray 103 Spouting device 105 Cleaning pipe J1 Rotating shaft J2 Predetermined rotating shaft

Claims (11)

A pump comprising a pump chamber having one inlet and at least two outlets,
An impeller disposed in the pump chamber so as to freely rotate in the forward and reverse directions, and absorbing water from the inlet by rotation to generate a water flow in the pump chamber; and a motor for rotating the impeller,
In the pump chamber,
A spiral channel located on the radially outer side of the impeller and a switching chamber formed in a concave shape adjacent to a part of the channel are formed,
One of the two outlets has a first outlet that allows the water in the pump chamber to be discharged from the passage by generating a water flow in the same direction by rotation of the impeller in a predetermined rotation direction. Communicate with some
The other second outlet of the two outlets generates a water flow in the same direction as the water in the pump chamber rotates in the direction opposite to the predetermined rotation direction of the impeller, thereby causing the switching chamber to flow from the flow path. Communicating with the switching chamber to be discharged through the section,
In the switching chamber portion, a switching valve that rotates around a predetermined axis that opens and closes the second outlet is disposed,
The switching valve is provided with a receiving portion that receives the water flow in the flow path to operate to close the second outlet when the water flow is in the predetermined direction and to open when the water flow is in the reverse direction.
The rotation locus of the receiving portion is formed so as to enter the outer peripheral side of the water channel,
A pump characterized by being outside the flow path when the second outlet is closed. The switching valve opens and closes the second outlet by rotating about a predetermined axis,
A lid for closing the second outlet,
A first receiving portion that is formed integrally with or separate from the lid portion, and that assists the rotation of the switching valve to open the second outlet by receiving the water flow in the reverse direction;
A second receiving surface that has an angle different from that of the first receiving portion and that assists in rotating the switching valve so as to close the second outlet by receiving at least a water flow in the predetermined rotation direction. And
A guide part formed between the first receiving part and the second receiving part for guiding the water flow;
The pump according to claim 1, comprising: The second receiving part and the guide part are connected,
The second receiving part is provided with a water receiving part projecting from a connecting position with the guide part,
The water receiving part is
3. The pump according to claim 2, wherein when the switching valve opens the second outlet, the pump receives a water flow guided from the guide portion. 4. 4. When the switching valve opens the second outflow port, at least one of the first receiving portion and the guide portion moves into the flow path. The pump according to any one of the above. From the guide portion of the switching valve to the predetermined rotating shaft side,
The pump according to any one of claims 2 to 4, wherein a rib for connecting the first receiving portion and the second receiving portion is formed. The pump according to any one of claims 2 to 5, wherein at least the first receiving portion, the second receiving portion, and the guide portion of the switching valve are integrally formed of a resin material. . The position of the inner peripheral wall that forms the outer periphery of the flow path that faces the second receiving portion is not hindering the movement of the end portion of the second receiving portion that is farthest from the predetermined axis. The pump according to any one of claims 2 to 6, wherein the pump has a concave shape that is recessed in a direction away from the pump. The pump according to any one of claims 1 to 7, wherein at least a part of the guide part forms a part of the flow path. 2. The inner peripheral wall portion adjacent to the switching valve in the flow path is formed with an inner peripheral plane portion that is a plane in which the water flow faces the switching valve in the water flow in the reverse direction. The pump according to any one of claims 1 to 8. The switching valve and the inner peripheral wall adjacent to the switching valve of the pump chamber are partially overlapped with each other in the vicinity of the second outlet, so that the switching valve is predetermined even when the second outlet is closed. With a gap of
The pump according to any one of claims 1 to 9, wherein, in the water flow in the reverse direction, the gap forms an outlet channel in which the water stream heads toward the second outlet. A dishwasher for washing dishes,
A pump according to any one of claims 1 to 10,
A tableware tray on which the tableware is placed;
An ejection device for ejecting water to the tableware;
A cleaning pipe connecting the pump and the ejection device;
With
The first outlet is a cleaning port connected to the cleaning pipe in the previous period,
The dishwasher, wherein the second outlet is a drain outlet for draining water in the dishwasher to the outside.

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