WO2023149077A1

WO2023149077A1 - Pump

Info

Publication number: WO2023149077A1
Application number: PCT/JP2022/045411
Authority: WO
Inventors: 克司佐藤
Original assignee: 株式会社不二工機
Priority date: 2022-02-04
Filing date: 2022-12-09
Publication date: 2023-08-10
Also published as: JP2023114030A

Abstract

A pump comprising: a pump chamber 13 having a suction port P11 and a plurality of discharge ports P21 and P22; an electric motor 41 capable of forward and reverse rotation; an impeller 21 provided in the pump chamber and driven by the electric motor; and a switching valve 31 that is rotated by the electric motor via the impeller and has a valve body 32 that opens and closes the discharge ports, wherein the valve body has a plurality of shielding wall portions that close the discharge ports and a plurality of opening portions that open the discharge ports, the shielding wall portions and the opening portions are arranged so as to surround the impeller and set alternately in array in a circumferential direction of the valve body so that the discharge ports can be opened or closed depending on the rotational position of the valve body, the discharge ports are formed on an inner peripheral surface 13a of the pump chamber along an outer peripheral surface of the valve body, and the pump includes a one-way rotation transmission mechanism 51 that is interposed between the impeller and the switching valve, transmits the rotational force in a second direction from the impeller to the switching valve but does not transmit the rotational force in a first direction from the impeller to the switching valve.

Description

pump

The present invention relates to a pump, and more particularly to a pump integrally provided with a switching valve for switching fluid flow paths.

In recent years, automobile heat exchange systems have become more complex. This is because the electrification of automobiles has progressed from the viewpoint of carbon neutrality, and cooling targets such as motors and batteries have increased in addition to vehicle interiors.

In such a heat exchange system, a switching valve and a water pump are provided in order to perform efficient cooling by switching the route for circulating the cooling water according to the operating conditions (for example, Patent Documents 2 and 3 below). reference).

In addition, Patent Document 1 below discloses a pump in which a switching valve is integrally provided in the pump, and the switching valve is operated by the driving force of an electric motor that drives an impeller.

Patent Document 1: JP-A-2007-113623 Patent Document 2: JP-A-2008-213583 Patent Document 3: JP-A-2011-98628

By the way, a switching valve and a water pump are usually used as a set, but in EV vehicles (electric vehicles) and hybrid vehicles, a plurality of sets of switching valves and water pumps are often incorporated to construct a heat exchange system. and the water pump are each equipped with a control motor.

Therefore, in the current heat exchange system, for example, the switching valve and the pump are integrated, or the electric motor that drives the switching valve and the electric motor that drives the pump are shared to simplify the system, save space, and save energy. There is room for improvement such as

On the other hand, Patent Document 1 discloses a pump integrally provided with a switching valve. However, this pump is a two-position, three-way switching valve, and the switching valve is controlled in two positions, a default position and a full lift position. For this reason, the pump described in this document is limited to the control of simply switching the discharge port or the suction port (selectively opening either of the two discharge ports or the suction port), and more diverse control, for example, two It is not possible to open and close the outlets at the same time, and it is not possible to provide three or more outlets or two or more inlets and switch the flow path between them.

Therefore, an object of the present invention is to enable switching control of a wider variety of flow paths in a switching valve-integrated pump that switches flow paths using an electric motor that drives the pump.

[First Invention]
In order to solve the above problems and achieve the object, a pump according to a first invention of the present application provides a pump chamber having a suction port for sucking fluid and two or more discharge ports for discharging fluid; an electric motor capable of generating a force and a rotational driving force in a second rotational direction opposite to the first rotational direction; An impeller that causes the fluid to flow into the pump chamber and flow the fluid out of the discharge port; A pump with a valve.

In addition, the valve body portion has two or more blocking wall portions that close the discharge port, and two or more opening portions that open the discharge port. These shielding walls and openings are arranged to surround the impeller, and are arranged alternately in the circumferential direction of the valve body so that the outlet can be opened or closed depending on the rotational position (rotational angle) of the valve body. are arranged in The two or more discharge ports are formed on the inner peripheral surface of the pump chamber around the impeller along the outer peripheral surface of the valve body. Further, the pump is interposed between the impeller and the switching valve, and transmits rotational driving force in the second rotational direction from the impeller to the switching valve, while transmitting rotational driving force in the first rotational direction from the impeller. Equipped with a one-way rotation transmission mechanism that does not transmit to the switching valve.

A pump according to a first invention of the present application is a pump integrally provided with a switching valve for switching a flow path of a fluid, and it is possible to drive the switching valve using an electric motor that drives the pump (impeller). It is.

To drive the pump (impeller), the electric motor should be rotated in the first rotation direction. The impeller rotates in the first rotation direction by receiving the rotational driving force from the electric motor, and the rotation of the impeller draws the fluid from the suction port into the pump chamber, and the sucked fluid flows from the open discharge port to the pump chamber. exhaled to the outside. Note that the rotational driving force in the first rotational direction is not transmitted to the switching valve because the one-way rotation transmission mechanism is interposed between the impeller and the switching valve. Further, in the present application, rotation in the first rotation direction may be referred to as "forward rotation", and rotation in the second rotation direction opposite thereto may be referred to as "reverse rotation".

In order to drive the switching valve (switch the flow path), the electric motor should be reversed (rotated in the second rotation direction). When the electric motor is reversed, the one-way rotation transmission mechanism interposed between the impeller and the switching valve transmits the rotational driving force in the second rotational direction from the impeller to the switching valve. , the switching valve rotates in the second rotation direction. Thereby, the channel can be switched.

The valve body portion of the switching valve includes a blocking wall portion that closes the discharge port and an opening portion that opens the discharge port, and the blocking wall portion and the opening portion are arranged so as to surround the impeller, In addition, along the peripheral surface of the valve body portion (in the circumferential direction), the there is

On the other hand, the discharge ports (two or more discharge ports) for discharging the fluid from the pump chamber are formed on the inner peripheral surface of the pump chamber around the impeller along the outer peripheral surface of the valve body. The valve body portion rotates and slides while being in contact with each ejection port (edge portion of the ejection port), and when the blocking wall portion faces the ejection port (if arranged at the formation position of the ejection port), the ejection port is closed. The outlet is closed, and if the opening faces the ejection port (if it is arranged at the ejection port formation position), the ejection port is opened.

The switching state of the flow path, that is, which of the two or more outlets is open and which is closed, is determined by the rotational position (rotational angle) of the valve body. In order to detect the rotational position (rotational angle) of the valve body, for example, a rotational angle sensor using a Hall element may be provided.

In addition, what kind of switching state (a plurality of different switching states) can be realized depends on the number of discharge ports and their arrangement positions, the number of shielding walls and openings and their arrangement positions, and each shielding. Various settings can be made depending on the length of the wall in the circumferential direction.

For example, in the first embodiment described later, two discharge ports are provided at respective positions facing each other across the rotation axis of the valve body, and the valve body is provided with three blocking walls and three openings. not only simply switches the fluid outlet between the first outlet and the second outlet (to realize two switching states), but also four switching states, that is, (1) the first A state in which the discharge port is opened and the second discharge port is closed (formation of a flow path for discharging the fluid that has flowed in from the suction port from the first discharge port), and (2) the first discharge port is closed and the second discharge port is closed. In addition to the open state (formation of a flow path through which the fluid flowing in from the suction port is discharged from the second discharge port), (3) the state in which both the first discharge port and the second discharge port are open (flow from the suction port and (4) a state in which both the first and second outlets are closed (blockage of the flow path). bottom.

In addition to the above-described first embodiment, according to the present invention (the term "present invention" in the present application includes both the above-described first invention and a second invention described later), for example, the number of ejection ports is three. Various switching states other than the four switching states described above can be achieved by providing four or more shielding walls or openings, or by changing the length (length in the circumferential direction) of each shielding wall. For example, three ejection ports are provided and the fluid is ejected from any one, two, or three ejection ports, or the second invention or the second invention described later is implemented. It is also possible to provide two or more suction ports as in the second embodiment so that the suction port into which the fluid flows can be switched.

The switching valve may have a support portion that supports the valve body portion and rotates together with the valve body portion, and the one-way rotation transmission mechanism is interposed between the support portion and the impeller. It may be a one-way clutch (such as a cam clutch, for example). The one-way rotation transmission mechanism referred to in the present invention is of any type. Other than the one-way clutch, the one-way rotation transmission mechanism of the present invention may be, for example, a ratchet mechanism or any other mechanism that transmits a rotation force in one direction and does not transmit a rotation force in the opposite direction. can be

Further, in the first aspect of the invention, it is preferable to provide a one-way rotation prevention mechanism that allows the switching valve to rotate in the second rotation direction, but prevents the switching valve from rotating in the first rotation direction. This is to more reliably maintain the switching valve in the stopped state to maintain the current switching state of the flow path. More specifically, when the pump (impeller) is driven by rotating the electric motor in the first rotation direction, the rotational driving force in the first rotation direction is transmitted through the one-way rotation transmission mechanism. Although not transmitted to the switching valve, the switching valve is dragged by the rotating impeller and rotated in the first rotation direction due to the frictional force generated between the impeller and the switching valve, changing the switching state of the flow path. there is a possibility. Therefore, in order to prevent this, it is preferable to provide the one-way rotation blocking mechanism.

Further, in this aspect, the switching valve includes a support portion that supports the valve body portion and rotates together with the valve body portion, and the one-way rotation blocking valve is interposed between the support portion and the inner surface of the pump chamber. It may have a mechanism. A ratchet mechanism, for example, can be used as the one-way rotation blocking mechanism.

In addition, in the first invention, the impeller and the valve body may be arranged coaxially (in other words, the rotational axis of the impeller and the rotational axis of the valve body may be aligned).

Further, in a typical aspect of the first aspect of the invention, the discharge port comprises a first discharge port and a second discharge port arranged at opposing positions across the rotation axis of the valve body portion, and the valve body portion has a first aperture, a second aperture, and a third aperture as apertures, and a first shielding wall, a second shielding wall, and a third shielding wall as shielding walls. The first opening and the third opening are formed at positions facing each other across the rotation axis of the valve body, and the second opening is the first opening in the circumferential direction of the valve body. formed between the hole and the third opening, the first blocking wall extends between the first opening and the second opening, and the second blocking wall extends between the second opening and the third aperture, and the third shield wall extends between the third aperture and the first aperture.

Further, in the above first invention, when the direction parallel to the rotating shaft of the impeller is defined as the vertical direction, the suction port may be provided on the bottom surface of the pump chamber below the impeller, and the electric motor may be provided above the impeller. .

[Second Invention]
A pump according to a second invention of the present application is provided with two or more suction ports for sucking fluid in a pump chamber, and not only a discharge port but also these two or more suction ports can be opened/closed or switched.

Specifically, the pump includes a pump chamber having two or more suction ports for sucking fluid and two or more discharge ports for discharging fluid, and a rotational driving force in a first rotation direction and in a direction opposite to the first rotation direction. an electric motor capable of generating a rotational driving force in a certain second direction of rotation; and a first valve body that opens and closes the discharge port and a second valve body that opens and closes the suction port, and is rotationally driven by an electric motor via the impeller. a switching valve, wherein the first valve body portion has two or more blocking wall portions for closing the discharge port and two or more opening portions for opening the discharge port; The shielding wall and the two or more openings are arranged so as to surround the impeller, and are arranged alternately in the circumferential direction of the valve body so that the outlet can be opened or closed depending on the rotational position of the valve body. The two or more discharge ports are arranged on the inner peripheral surface of the pump chamber around the impeller along the outer peripheral surface of the valve body, and the second valve body is arranged together with the first valve body. The pump is interposed between the impeller and the switching valve to transmit rotational driving force in the second rotation direction from the impeller to the switching valve, while the pump is rotated in the first rotation. It has a one-way rotation transmission mechanism that does not transmit directional rotational driving force from the impeller to the switching valve.

In the pump according to the second aspect of the present invention, the switching valve has a support portion that supports the first valve body portion and the second valve body portion and rotates together with the first valve body portion and the second valve body portion. In some cases, the directional rotation transmission mechanism is configured by a one-way clutch interposed between the support portion and the impeller.

Also in the second invention, for the same reason as in the first invention, while allowing the switching valve to rotate in the second rotational direction, the switching valve is prevented from rotating in the first rotational direction. A directional rotation blocking mechanism is preferably provided.

Further, in that case, the switching valve has a support portion that supports the first valve body portion and the second valve body portion and rotates together with the first valve body portion and the second valve body portion, and the support portion and the pump In some cases, the one-way rotation blocking mechanism is configured by a ratchet mechanism interposed between the inner surface of the chamber.

Furthermore, the impeller, the first valve body and the second valve body are arranged coaxially (the rotation axis of the impeller, the rotation axis of the first valve body and the rotation of the second valve body). axis).

Further, in a typical aspect of the second invention, the discharge port comprises a first discharge port and a second discharge port which are arranged at positions facing each other with the rotation axis of the first valve body portion interposed therebetween. The valve body portion has a first opening portion, a second opening portion, and a third opening portion as opening portions, and a first blocking wall portion, a second blocking wall portion, and a third blocking wall portion as blocking wall portions. a wall portion, wherein the first opening portion and the third opening portion are formed at positions facing each other across the rotation axis of the valve body portion, and the second opening portion extends in the circumferential direction of the valve body portion; It is formed between the first opening and the third opening, the first blocking wall extends between the first opening and the second opening, and the second blocking wall extends between the first opening and the second opening. It extends between the second opening and the third opening, and the third blocking wall extends between the third opening and the first opening.

Furthermore, in another aspect of the second invention, the second valve body portion has a cylindrical shape and is provided coaxially with the first valve body portion, and includes one or more blocking wall portions that close the suction port and the suction port. along the circumferential direction of the second valve body so that the blocking wall and the opening can open or close the suction port depending on the rotational position of the second valve body The pump may have a cylindrical suction chamber in which the second valve body portion is slidably and rotatably accommodated, and the two or more suction ports may open to the inner peripheral surface of the suction chamber.

In the above-mentioned another aspect, when the vertical direction is the direction parallel to the rotation axis of the impeller, the suction chamber may be provided on the lower surface of the pump chamber, and the electric motor may be provided above the impeller.

According to the present invention, more diversified flow path switching control becomes possible in a switching valve-integrated pump that switches flow paths using an electric motor that drives the pump.

Other objects, features and advantages of the present invention will be clarified by the following description of the embodiments of the present invention based on the drawings. It should be noted that the present invention is not limited to the following embodiments, and it is obvious to those skilled in the art that various modifications can be made within the scope of the claims. Moreover, the same code|symbol shows the same or a corresponding part in each figure.

FIG. 1 is a perspective view showing a pump according to a first embodiment of the invention. FIG. FIG. 2 is a vertical sectional view showing the pump according to the first embodiment. FIG. 3 is a horizontal end view (end view taken along line X1-X1 in FIG. 2) showing the pump according to the first embodiment. FIG. 4 is a horizontal end view (end view taken along line X2-X2 in FIG. 2) showing the pump according to the first embodiment. FIG. 5 is a horizontal end view (end view taken along line X1-X1 in FIG. 2) showing a first switching state by the switching valve of the pump according to the first embodiment. FIG. 6 is a horizontal end view (end view taken along line X1-X1 in FIG. 2) showing a second switching state of the switching valve of the pump according to the first embodiment. FIG. 7 is a horizontal end view (end view taken along line X1-X1 in FIG. 2) showing a third switching state of the switching valve of the pump according to the first embodiment. FIG. 8 is a horizontal end view (end view taken along line X1-X1 in FIG. 2) showing a fourth switching state of the switching valve of the pump according to the first embodiment. FIG. 9 is a horizontal end view (end view taken along line X1-X1 in FIG. 2) showing a modification of the pump according to the first embodiment. FIG. 10 is a horizontal end view (end view taken along line X1-X1 in FIG. 2) showing another modification of the pump according to the first embodiment. FIG. 11 is a horizontal end view (an end view taken along line X1-X1 in FIG. 2) showing still another modification of the pump according to the first embodiment. FIG. 12 is a perspective view showing a pump according to a second embodiment of the invention. FIG. 13 is a vertical sectional view showing the pump according to the second embodiment. FIG. 14 is a horizontal end view (end view taken along line X3-X3 in FIG. 13) showing a first switching state by the switching valve of the pump according to the second embodiment. FIG. 15 is a horizontal end view (end view taken along line X3-X3 in FIG. 13) showing a second switching state of the switching valve of the pump according to the second embodiment. FIG. 16 is a horizontal end view (end view taken along line X3-X3 in FIG. 13) showing a third switching state of the switching valve of the pump according to the second embodiment. FIG. 17 is a horizontal end view (end view taken along line X3-X3 in FIG. 13) showing a fourth switching state of the switching valve of the pump according to the second embodiment. FIG. 18 is a horizontal end view (end view taken along line X3-X3 in FIG. 13) showing a first switching state by the switching valve of the modified example of the pump according to the second embodiment. FIG. 19 is a horizontal end view (end view taken along line X3-X3 in FIG. 13) showing a second switching state of the switching valve of the modified example of the pump according to the second embodiment. FIG. 20 is a horizontal end view (end view taken along line X3-X3 in FIG. 13) showing a third switching state by the switching valve of the modified example of the pump according to the second embodiment.

[First Embodiment]
As shown in FIGS. 1 to 4, the pump 11 according to the first embodiment of the present invention includes a housing 12 having a pump chamber 13 therein and an impeller 21 rotatably installed inside the pump chamber 13. a suction pipe 15 for sucking fluid into the pump chamber 13; two discharge pipes (first discharge pipe 16 and second discharge pipe 17) having discharge ports P21 and P22 for discharging fluid from the pump chamber 13; A switching valve 31 that opens and closes the discharge ports P21 and P22, an electric motor (motor) 41 that rotationally drives the impeller 21 and the switching valve 31, and a one-way clutch interposed between the impeller 21 and the switching valve 31. A rotation transmission mechanism) 51, a ratchet mechanism (one-way rotation prevention mechanism) 61 interposed between the switching valve 31 and the housing 12 (the inner peripheral surface 13a of the pump chamber 13), and the top surface of the pump chamber 13 are connected to each other. and a lid body 14 for closing.

The pump chamber 13 has a circular planar shape and has an annular inner peripheral surface 13 a that stands upright so as to surround the impeller 21 . The first discharge pipe 16 and the second discharge pipe 17 are provided so as to face each other with the pump chamber interposed therebetween. A second discharge port P22, which is an opening of the discharge pipe 17 to the pump chamber 13, is formed in the inner peripheral surface 13a of the pump chamber 13 so as to face each other with the central axis A of the pump chamber 13 interposed therebetween.

An impeller 21 is arranged in the center of the pump chamber 13 so that the rotation axis A is in the vertical direction (vertical direction in FIG. 2), and the suction A suction port P11, which is an opening of the pipe 15 to the pump chamber 13, is formed. In addition, the central axis A of the pump 11 of the present embodiment, the central axis A of the pump chamber 13, the central axis A of the suction pipe 15 (and the suction port P11), the rotation axis A of the impeller 21, and the rotor described later The rotation axis A of 42 and the rotation axis A of the switching valve 31 both extend in the vertical direction, and coincide with each other (overlap) when viewed from the plane (from the vertical direction).

A motor 41 that drives the impeller 21 and the switching valve 31 is provided above the impeller 21 . The motor 41 has a rotor 42 integrally provided with the impeller 21 at its lower end, and a stator 43 that includes a coil 44 and generates a magnetic field for rotating the rotor 42. These are covered with a lid. It is covered with a resin mold cover 45 formed on the upper surface of the body 14 . The rotor 42 is accommodated in a cylindrical portion 14a formed so as to protrude upward from the central portion of the lid 14 that closes the top surface (upper surface) of the pump chamber 13 in a watertight state. A stator 43 is arranged.

The rotor 42 , impeller 21 and switching valve 31 are rotatably supported by a shaft 46 extending vertically along the central axis A of the pump 11 . The shaft 46 penetrates through the rotor 42 , the impeller 21 and the switching valve 31 . The upper end of the shaft 46 is fixed to the upper surface of the cylindrical portion 14a of the lid 14, and the lower end of the shaft 46 is fixed to a bearing member 47 arranged at the center of the inlet P11. The bearing member 47 is supported by the leg portion 48 on the upper inner peripheral surface of the intake pipe 15 .

The impeller 21 has a plurality of blades 24 extending radially with respect to the rotation axis A between the bottom plate portion 23 and the top plate portion 22, and a bottomless lidless blade extending vertically downward at the center of the bottom surface of the bottom plate portion 23. has a cylindrical elevated portion 25 of . The top plate portion 22, the bottom plate portion 23, and the blades 24 provided therebetween are referred to as an impeller body portion.

At the center of the bottom plate portion 23, a center hole communicating with the plateau portion 25 is formed. communicate with each other. Therefore, the fluid sucked into the pump chamber 13 from the suction port P11 by the rotation of the impeller 21 (see the arrow W1 in FIG. 2) flows through the inside of the elevated portion 25 and the center hole of the bottom plate portion 23 to the impeller main body. It flows into the inside (the space between the bottom plate portion 23 and the top plate portion 22), and is discharged from between the blades 24 toward the inner peripheral surface 13a of the pump chamber 13 by the centrifugal force of the rotating impeller 21, and is released. The liquid is discharged to the outside through

discharge pipes

16 and 17 from discharge ports P21 and P22 (see arrow W2 in FIG. 2).

A switching valve 31 is provided around the impeller 21 . The switching valve 31 includes a cylindrical valve body portion 32 surrounding the impeller main body, a support portion 33 having a cylindrical shape surrounding the hill portion 25 and supporting the valve body portion 32 from below, and a support An arm portion 34 extends from the lower end portion of the portion 33 toward the shaft 46 and rotatably supports the support portion 33 (switching valve 31 ) on the shaft 46 .

Although the valve body portion 32 typically has a cylindrical shape as in this embodiment, it may have, for example, a truncated cone shape or a flat barrel shape. Further, in this case, the peripheral surface 13a of the pump chamber around the valve body portion where the discharge ports P21 and P22 are formed has the shape of the peripheral surface of the valve body portion 32 so that the discharge ports P21 and P22 can be opened and closed by the valve body portion 32. It is sufficient to have a corresponding shape (that spreads along the outer peripheral surface of the valve body portion 32).

The valve body portion 32 has a plurality of blocking wall portions 26 (26a, 26b, 26c) and a plurality of opening portions 27 (27a, 27b, 27c) arranged in the circumferential direction. Along with this, it slides and rotates against the inner peripheral surface 13a of the pump chamber 13 (rotates while being in contact with the inner peripheral surface 13a of the pump chamber 13) to open and close the discharge ports P21 and P22.

More specifically, in the present embodiment, three shielding wall portions 26 that close the ejection ports P21 and P22, that is, a first shielding wall portion 26a, a second shielding wall portion 26b, and a third shielding wall portion 26c, It has three apertures 27, namely a first aperture 27a, a second aperture 27b and a third aperture 27c, which open outlets P21 and P22. In addition, the first opening portion 27a and the third opening portion 27c are formed at positions facing each other with the rotation axis A of the valve body portion 32 interposed therebetween. and the third opening 27c.

The first shielding wall 26a extends between the first opening 27a and the second opening 27b, and the second shielding wall 26b extends between the second opening 27b and the third opening 27c. and the third blocking wall portion 26c extends between the third opening portion 27c and the first opening portion 27a. When the blocking wall portion 26 faces the ejection ports P21 and P22, the ejection ports are closed, and when the opening portion 27 faces the ejection ports P21 and P22, the ejection ports are opened. The opening/closing operation of the discharge ports P21 and P22 by the switching valve 31 will be described in detail later with reference to FIGS. 5 to 8. FIG.

A one-way clutch 51 interposed between the impeller 21 and the switching valve 31 enables both the impeller 21 and the switching valve 31 to be driven by a common motor 41. In this embodiment, a cam clutch is used. (see Figure 4). More specifically, the cam clutch 51 is provided in the support portion 33 so as to be interposed between the hill portion 25 of the impeller 21 and the support portion 33 surrounding the hill portion 25 . Although the rotational force in the second rotational direction R2 is transmitted to the supporting portion 33, the rotational force in the first rotational direction R1 is not transmitted.

Therefore, when the motor 41 is rotated forward and the impeller 21 integrated with the rotor 42 is rotated in the first rotation direction R1 (when the pump is driven), the rotational driving force of the motor 41 is applied to the impeller 21 ( Although it is not transmitted from the hill portion 25) to the switching valve 31 (support portion 33), when the motor 41 is reversed and the impeller 21 is rotated in the second rotation direction R2 (when the switching valve 31 is driven/channel switching ), the rotational driving force of the motor 41 is transmitted from the impeller 21 (the elevated part 25) to the switching valve 31 (the supporting part 33), so that the switching valve 31 (and thus the valve body part 32) is rotated for the second time. It can be rotated in direction R2.

On the other hand, the ratchet mechanism 61 interposed between the switching valve 31 and the inner peripheral surface 13a of the pump chamber 13 prevents the switching valve 31 from rotating in the first rotation direction R1.

Specifically, the ratchet mechanism 61 includes a plurality of teeth 33a formed on the outer peripheral surface of the support portion 33, and a locking pin 62 extending from the inner peripheral surface 13a of the pump chamber 13 toward the support portion 33. When the support portion 33 rotates in the second rotation direction R2, the locking pin 62 escapes outward and does not engage with the tooth 33a, allowing rotation of the support portion 33 (switching valve 31) in the second rotation direction R2. However, when the support portion 33 rotates in the first rotation direction R1, the locking pin 62 engages with the teeth 33a to prevent the support portion 33 (switching valve 31) from rotating in the first rotation direction R1. .

By interposing the cam clutch 51 between the impeller 21 and the switching valve 31, the rotational driving force of the motor 41 is not transmitted to the switching valve 31 when the pump is driven (when the motor 41 rotates forward). If there is only 51, there is a risk that the switching valve 31 will be dragged by the rotating impeller 21 and rotated due to the frictional force between the impeller 21 and the switching valve 31 (cam clutch 51). On the other hand, if the ratchet mechanism 61 is provided, it is possible to reliably maintain the switching valve 31 in the stopped state and maintain the switching state of the flow path when the pump is driven.

Further, the teeth 33a of the ratchet mechanism 61 are formed so as to be engaged with the locking pin 62 in each of a plurality of switching states (first to fourth switching states) of the switching valve 31, which will be described later. Keep

The operation of the pump 11 according to this embodiment will be described based on FIGS. 5 to 8. FIG.

[First switching state]
FIG. 5 shows the first switching state of the pump 11 according to this embodiment. In this first switching state, the second opening portion 27b of the valve body portion 32 faces the first discharge port P21. , the first ejection port P21 is opened, and the second ejection port P22 is closed by the third blocking wall portion 26c of the valve body portion 32. As shown in FIG. Therefore, when the pump 11 is driven (the motor 41 is rotated forward) in this first switching state, the rotation of the impeller 21 causes the fluid to be sucked into the pump chamber 13 from the suction port P11, and the fluid is drawn into the second opening. 27b and the first discharge port P21, and discharged from the first discharge pipe 16 (see arrow W2).

In FIG. 5, a schematic diagram showing a small flow path is shown in the upper right, but this diagram shows that a flow path is formed from the suction port P11 to the first ejection port P21 (see FIG. 6). Similar schematic diagrams are also shown in FIG. 8 and FIGS. 14 to 20 of a second embodiment described later).

2 and 3, the valve body portion 32 (blocking wall portion 26) is formed not only on the edges of the discharge ports P21 and P22 but also on the inner peripheral surface 13a between the first discharge port P21 and the second discharge port P22. 5 to 8, the edges of the discharge ports P21 and P22 protrude toward the center of the pump chamber 13, and the valve body portion 32 (blocking wall portion 26) is Although a structure in which only the edge of the discharge port is contacted and the other portion of the inner peripheral surface 13a of the pump chamber (the inner peripheral surface 13a between the first outlet P21 and the second outlet P22) is not contacted is shown, Any of these structures may be employed in the invention, the present embodiment, and a second embodiment described later.

However, when adopting a structure in which the valve body portion 32 is brought into contact only with the edge portions of the discharge ports P21 and P22 as shown in FIGS. In order to prevent part of the fluid from leaking into the gap between the valve body portion 32 and the inner peripheral surface 13a of the pump chamber, the opening portion 27 of the valve body portion 32 is made smaller than the discharge ports P21 and P22 and It is preferable that the openings 27 are accommodated inside the edges of the ejection ports P21 and P22 when facing P21 and P22.

In the first switching state, the locking pin 62 of the ratchet mechanism 61 is engaged with the tooth 33a (the state shown in FIG. 4), and the impeller 21 (upper portion 25) rotates. Even then, the switching valve 31 (supporting portion 33) does not rotate in the first rotation direction R1. The same applies to the second to fourth switching states, which will be described later.

[Second switching state]
FIG. 6 shows the second switching state of the pump 11 according to the present embodiment. In this second switching state, the switching valve 31 is rotated counterclockwise (in the second rotation direction R2) from the first switching state. ) is rotated by 180°.

In order to rotate the switching valve 31, the motor 41 is reversely driven as described above to rotate the impeller 21 in the second rotation direction R2. As a result, the cam clutch 51 provided between the hill portion 25 (impeller 21) and the support portion 33 (switching valve 31) transmits the rotational driving force in the second rotation direction R2 from the hill portion 25 to the support portion 33. , the switching valve 31 (valve body 32) rotates counterclockwise. When the switching valve 31 is driven, the rotation angle of the switching valve 31 is detected by an angle sensor (not shown), and the driving of the motor 41 is stopped when the switching valve 31 is rotated by 180°.

In this second switching state, the second opening P22 is opened by the second opening portion 27b facing the second ejection port P22, and the first ejection port P21 is closed by the third blocking wall portion 26c. , from the suction port P11 to the second discharge port P22. When the pump 11 is driven in this second switching state, fluid is sucked into the pump chamber 13 from the suction port P11, and the fluid is discharged from the second discharge pipe 17 through the second opening 27b and the second discharge port P22. (see arrow W3).

[Third switching state]
FIG. 7 shows a third switching state of the pump 11 according to the present embodiment. In this third switching state, the switching valve 31 is rotated counterclockwise (in the second rotation direction R2) from the first switching state. ) is rotated by 270°.

In this third switching state, the first opening 27a faces the first ejection port P21 and the third opening 27c faces the second ejection port P22. Both of the outlets P22 are opened, and flow paths are formed from the suction port P11 to both the first outlet P21 and the second outlet P22. Therefore, when the pump 11 is driven in this third switching state, the fluid sucked into the pump chamber 13 from the suction port P11 is discharged from both the first discharge pipe 16 and the second discharge pipe 17 (see arrows W2 and W3). ).

[Fourth switching state]
FIG. 8 shows a fourth switching state of the pump 11 according to the present embodiment. In this fourth switching state, the switching valve 31 is rotated counterclockwise (in the second rotation direction R2) from the first switching state. ) is rotated by 210°.

In this fourth switching state, the first outlet P21 is closed by the first shielding wall portion 26a and the second outlet P22 is closed by the third shielding wall portion 26c. It's becoming

As described above, according to the present embodiment, the flow path (discharge port) is not only switched between the first discharge port P21 and the second discharge port P22, but also the switching between the first discharge port P21 and the second discharge port P22 is performed. It is possible to simultaneously discharge the fluid from both sides (third switching state) or block the flow path (fourth switching state).

As for the arrangement position of the discharge port (discharge pipe), for example, as shown in FIG. It can be arranged in a variety of ways, such as forming an angle of less than 90° or more than 90°. As for the number of discharge ports (discharge pipes), for example, three discharge ports P21, P22, P23 are provided as shown in FIG. 10, or four discharge ports P21, P22, P23, P24 are provided as shown in FIG. , or five or more outlets.

Furthermore, according to the combination of flow paths (switching states) to be formed, the number of the shielding wall portions 26 and the opening portions 27 may be increased or decreased, or the length of the shielding wall portion 26 in the circumferential direction may be changed. By appropriately adding changes to , it is possible to configure pumps having various switching states other than the present embodiment and the second embodiment described below, based on the present invention.

[Second embodiment]
As shown in FIGS. 12 to 17, a pump 71 according to the second embodiment of the present invention includes a housing 12 having a pump chamber 13 therein and a pump chamber 13, similarly to the pump 11 of the first embodiment. 13, two discharge pipes (first discharge pipe 16 and second discharge pipe 17) having discharge ports P21 and P22 for discharging the fluid from the pump chamber 13; A switching valve 31 for opening and closing the outlets P21 and P22, a motor 41 for rotationally driving the impeller 21 and the switching valve 31, a one-way clutch 51 interposed between the impeller 21 and the switching valve 31, and the switching valve 31. A ratchet mechanism interposed between the housing 12 (the inner peripheral surface 13a of the pump chamber 13) and a lid 14 that closes the top surface of the pump chamber 13 are provided so that the discharge ports P21 and P22 can be switched. However, unlike the pump 11 of the first embodiment, a plurality of (two in this embodiment)

suction pipes

73 and 74 for sucking fluid into the pump chamber 13 are provided. A plurality of suction ports P11 and P12 corresponding to the

pipes

73 and 74 can be switched. In the following, configurations similar to those of the first embodiment are denoted by the same reference numerals, redundant explanations are omitted, and differences are mainly described.

In this embodiment, the switching valve 31 includes a first valve body portion 32 that can open and close the first ejection port P21 and the second ejection port P22 by having the same structure as the valve body portion 32 of the first embodiment. In addition to this, it has a second valve body portion 35 for opening and closing the intake ports P11 and P12. A suction chamber 72 communicating with the pump chamber 13 is provided on the bottom surface of the pump chamber 13 , and the second valve body portion 35 is arranged in the suction chamber 72 . Furthermore, in this embodiment, the shaft 46 extends to the bottom surface of the suction chamber 72, penetrates the second valve body portion 35, and rotatably supports the second valve body portion 35. As shown in FIG. A lower end of the shaft 46 is supported by the bottom surface of the suction chamber 72 .

The second valve body portion 35 has a cylindrical shape with one shielding wall portion 75 and one opening portion 76, and is integrally formed with the first valve body portion 32 and the support portion 33. It rotates together with body 32 . On the other hand, the suction chamber 72 has a cylindrical shape with a bottom and no lid, and has an inner peripheral surface 72a that stands vertically. A first suction port P11 and a second suction port P12 are formed in the inner peripheral surface 72a of the suction chamber 72 so as to face each other across the central axis of the suction chamber 72. By sliding and rotating within 72, the first inlet P11 and the second inlet P12 are opened and closed. That is, when the opening portion 76 of the second valve body portion 35 faces the intake ports P11 and P12, the intake ports are opened, and the blocking wall portion 75 of the second valve body portion 35 faces the intake ports P11 and P12. If so, the suction port is closed.

The suction chamber 72 and the second valve body portion 35 are provided coaxially with the pump chamber 13, the impeller 21, the rotor 42, and the first valve body portion 32. The rotation axis A of the body portion 35 all extends in the vertical direction, and when viewed from the plane (vertical direction), the central axis A of the pump chamber 13 and the rotation axes of the impeller 21, the rotor 42 and the first valve body portion 32 Match each other with A.

Also, the first suction pipe 73 and the second suction pipe 74 are provided so as to extend vertically downward from the outer peripheral surface of both ends in the radial direction of the suction chamber 72 . fixed to the surface. Further, in the fixing portion, the holes formed so as to penetrate the side walls of the

suction pipes

73 and 74 horizontally and the hole formed so as to pass horizontally through the side walls of the suction chamber 72 are connected to each other. The

suction pipes

73 and 74 and the suction chamber 72 are communicated with each other. Each suction port P11, P12 is formed by each of the above-mentioned holes penetrating the side wall of the suction chamber 72. As shown in FIG.

The operation of the pump 71 of this embodiment is as follows.

[First switching state]
FIG. 14 shows the first switching state of the pump 71 according to this embodiment. In this first switching state, the opening 76 of the second valve body 35 faces the first suction port P11. , the first suction port P11 is opened, and the blocking wall portion 75 of the second valve body portion 35 faces the second suction port P12, thereby closing the second suction port P12. In this first switching state, the first valve body portion 32 is in the first switching state shown in FIG.

Therefore, when the pump 71 is driven (the motor 41 is rotated forward) in this first switching state, the fluid is sucked into the pump chamber 13 through the suction chamber 72 from the first suction port P11 (first suction pipe 73). (See arrow W4), the fluid is discharged from the first discharge pipe 16 through the second opening portion 27b (see FIG. 5) of the first valve body portion 32 and the first discharge port P21.

[Second switching state]
FIG. 15 shows the second switching state of the pump according to the present embodiment. In this second switching state, the switching valve 31 is rotated counterclockwise (in the second rotation direction R2) from the first switching state. It is in a state rotated by 180°. When the switching valve 31 is driven, the rotation angle of the switching valve 31 is detected by an angle sensor (not shown) as in the first embodiment, and the driving of the motor 41 is stopped when the switching valve 31 is rotated by 180°. good.

In this second switching state, the opening portion 76 of the second valve body portion 35 faces the second suction port P12 to open the second suction port P12, and the blocking wall portion 75 of the second valve body portion 35 is opened. The first suction port P11 is closed by facing the first suction port P11. Further, since the first valve body portion 32 and the second valve body portion 35 rotate integrally (together), in the second switching state, the first valve body portion 32 is in the second switching state shown in FIG. It is in.

When the pump 71 is driven in this second switching state, the fluid is sucked into the pump chamber 13 through the suction chamber 72 from the second suction port P12 (second suction pipe 74) (see arrow W5) and the first valve body portion. Fluid is discharged from the second discharge pipe 17 through the second opening 27b (see FIG. 6) of 32 and the second discharge port P22.

[Third switching state]
FIG. 16 shows a third switching state of the pump 71 according to the present embodiment. In this third switching state, the switching valve 31 is rotated counterclockwise (in the second rotation direction R2) from the first switching state. ) is rotated by 270°.

In this third switching state, the opening portion 76 of the second valve body portion 35 opens both the first suction port P11 and the second suction port P12. Also, the first valve body portion 32 is in the third switching state shown in FIG.

When the pump 71 is driven in this third switching state, both the first suction port P11 (first suction pipe 73) and the second suction port P12 (second suction pipe 74) pass through the suction chamber 72 to the pump chamber 13. Fluid is sucked (see arrows W4 and W5) and discharged from both

discharge pipes

16 and 17. As shown in FIG. That is, the fluid is discharged from the first discharge pipe 16 through the first opening portion 27a (see FIG. 7) of the first valve body portion 32 and the first discharge port P21, and the third opening of the first valve body portion 32 is discharged. Fluid is discharged from the second discharge pipe 17 through the hole 27c and the second discharge port P22.

[Fourth switching state]
FIG. 17 shows a fourth switching state of the pump according to the present embodiment. In this fourth switching state, the switching valve 31 is rotated counterclockwise (in the second rotation direction R2) from the first switching state. It is in a state rotated by 210°.

In this fourth switching state, the second suction port P12 is open, but the first valve body portion 32 is in the fourth switching state shown in FIG. 26a and the second discharge port P22 is closed by the third blocking wall portion 26c, the valve is in a closed state in which all flow paths are blocked.

18 to 20 show modifications of this embodiment.

In this modification, the relative positional relationship (positional relationship in the rotational direction) between the first valve body portion 32 and the second valve body portion 35 is changed, and the first valve body portion 32 is shown in FIG. When in the first switching state, the second valve body portion 35 is rotated 90 degrees counterclockwise with respect to the second embodiment (FIG. 14) as shown in FIG.

Therefore, according to this modification, in the first switching state shown in FIG. 18, both suction ports P11 and P12 are opened, and fluid flows into the pump chamber 13 from both suction pipes 73 and 74 (see arrows W4 and W5). ). Then, the fluid is discharged from the first discharge pipe 16 through the second opening 27b (see FIG. 5) of the first valve body 32 and the first discharge port P21.

In addition, in the second switching state in which the switching valve 31 is rotated 180 degrees counterclockwise (in the second rotation direction R2) from the first switching state, as shown in FIG. P11 and P12 are opened and the fluid flows into the pump chamber 13 from both suction pipes 73 and 74 (see arrows W4 and W5), but is discharged by the first valve body portion 32 (see FIG. 6) in the second switching state. The outlet is switched to the second outlet P22, and the fluid is discharged from the second discharge pipe 17.

Further, in a third switching state rotated 270° counterclockwise (in the second rotation direction) from the first switching state, the first suction port P11 is opened and the second suction port P12 is opened as shown in FIG. Closed. Also, the first valve body portion 32 is in the third switching state (see FIG. 7) in which both outlets P21 and P22 are opened. Therefore, the fluid flows into the pump chamber 13 from the first suction pipe P11 (see arrow W4) and is discharged from both discharge pipes (first discharge pipe 16 and second discharge pipe 17).

In addition, in the fourth switching state rotated counterclockwise (in the second rotation direction) by 210° from the first switching state, both discharge ports P21 and P22 are closed by the first valve body (see FIG. 8). ), the valve is closed in the same manner as in the second embodiment.

By changing the relative positional relationship between the first valve body portion 32 that opens and closes the discharge ports P21 and P22 and the second valve body portion 35 that opens and closes the suction ports P11 and P12, different switching states can be achieved. It is possible to construct a pump that can be realized.

A Rotational axis (central axis)
P11 suction port (first suction port)
P12 Second suction port P21 First discharge port P22 Second discharge port P23, P24 Discharge port W1, W2, W3, W4,

W5 Fluid flow

11, 71 Pump 12 Housing 13 Pump chamber 13a Inner peripheral surface of pump chamber 14 Lid 14a Cylindrical portion of lid 15 Suction pipe 16 First discharge pipe 17 Second discharge pipe 21 Impeller 22 Top plate portion 23 Bottom plate portion 24 Blade 25

Hill portion

26, 75 Shielding wall 26a First shielding wall 26b Second 2 shielding wall portion 26c third shielding

wall portion

27, 76 opening portion 27a first opening portion 27b second opening portion 27c third opening portion 31 switching valve 32 valve body portion (first valve body portion)
33 support portion 33a tooth 34 arm portion 35 second valve body portion 41 electric motor (motor)
42 Rotor
43 stator
44 Coil 45 Resin Mold Cover 46 Shaft 47 Bearing Member 48 Leg 51 One-way Clutch (Cam Clutch)
61 ratchet mechanism 62 locking pin 72 suction chamber 73 first suction pipe 74 second suction pipe

Claims

a pump chamber having an inlet for sucking a fluid and two or more outlets for discharging the fluid;
an electric motor capable of generating a rotational driving force in a first rotational direction and a rotational driving force in a second rotational direction opposite to the first rotational direction;
A vane that is rotatably provided in the pump chamber and is rotationally driven by the electric motor to cause the fluid to flow into the pump chamber from the suction port and flow out from the discharge port. car and
a switching valve that has a valve body that opens and closes the discharge port and that is rotationally driven by the electric motor via the impeller,
The valve body portion is
two or more shielding walls that close the outlet;
and two or more openings that open the ejection port,
The two or more shielding walls and the two or more openings are arranged to surround the impeller, and the valve body can open or close the discharge port depending on the rotational position of the valve body. are arranged alternately in the circumferential direction of the part,
The two or more discharge ports are formed on the inner peripheral surface of the pump chamber around the impeller along the outer peripheral surface of the valve body,
The pump is
It is interposed between the impeller and the switching valve, and transmits rotational driving force in the second rotational direction from the impeller to the switching valve, while transmitting rotational driving force in the first rotational direction to the blades. A pump characterized by comprising a one-way rotation transmission mechanism that does not transmit from a vehicle to the switching valve.
The switching valve has a support portion that supports the valve body portion and rotates together with the valve body portion,
The pump according to claim 1, wherein the one-way rotation transmission mechanism is a one-way clutch interposed between the support portion and the impeller.
3. The apparatus according to claim 1, further comprising a one-way rotation prevention mechanism that allows the switching valve to rotate in the second rotation direction and prevents the switching valve from rotating in the first rotation direction. pump.
The switching valve has a support portion that supports the valve body portion and rotates together with the valve body portion,
4. The pump according to claim 3, wherein the one-way rotation blocking mechanism is a ratchet mechanism interposed between the support portion and the inner surface of the pump chamber.
The pump according to any one of claims 1 to 4, wherein the impeller and the valve body portion are arranged coaxially.
The discharge port comprises a first discharge port and a second discharge port arranged at positions facing each other with the rotation axis of the valve body portion interposed therebetween,
The valve body portion is
Having a first opening, a second opening, and a third opening as the openings,
The shielding wall includes a first shielding wall, a second shielding wall, and a third shielding wall,
The first opening and the third opening are formed at positions facing each other across the rotation axis of the valve body,
The second opening is formed between the first opening and the third opening in the circumferential direction of the valve body,
The first shield wall extends between the first opening and the second opening,
The second shield extends between the second opening and the third opening,
The pump according to any one of claims 1 to 5, wherein the third blocking wall extends between the third opening and the first opening.
When the direction parallel to the rotation axis of the impeller is taken as the vertical direction,
The suction port is provided on the bottom surface of the pump chamber below the impeller,
The pump according to any one of claims 1 to 6, wherein the electric motor is provided above the impeller.
a pump chamber having two or more suction ports for sucking fluid and two or more discharge ports for discharging said fluid;
an electric motor capable of generating a rotational driving force in a first rotational direction and a rotational driving force in a second rotational direction opposite to the first rotational direction;
A vane that is rotatably provided in the pump chamber and is rotationally driven by the electric motor to cause the fluid to flow into the pump chamber from the suction port and flow out from the discharge port. car and
having a first valve body that opens and closes the discharge port, and a second valve body that opens and closes the suction port;
a switching valve rotationally driven by the electric motor via the impeller,
The first valve body portion is
two or more shielding walls that close the outlet;
and two or more openings that open the ejection port,
The two or more shielding walls and the two or more openings are arranged to surround the impeller, and the valve body can open or close the discharge port depending on the rotational position of the valve body. are arranged alternately in the circumferential direction of the part,
The two or more discharge ports are formed on the inner peripheral surface of the pump chamber around the impeller along the outer peripheral surface of the valve body,
the second valve body section is rotatable together with the first valve body section to open and close the suction port;
The pump is
It is interposed between the impeller and the switching valve, and transmits rotational driving force in the second rotational direction from the impeller to the switching valve, while transmitting rotational driving force in the first rotational direction to the blades. A pump characterized by comprising a one-way rotation transmission mechanism that does not transmit from a vehicle to the switching valve.
The switching valve has a support part that supports the first valve body part and the second valve body part and rotates together with the first valve body part and the second valve body part,
The pump according to claim 8, wherein the one-way rotation transmission mechanism is a one-way clutch interposed between the support portion and the impeller.
10. The device according to claim 8, further comprising a one-way rotation prevention mechanism that allows the switching valve to rotate in the second rotation direction and prevents the switching valve from rotating in the first rotation direction. pump.
The switching valve has a support part that supports the first valve body part and the second valve body part and rotates together with the first valve body part and the second valve body part,
11. The pump according to claim 10, wherein the one-way rotation blocking mechanism is a ratchet mechanism interposed between the support portion and the inner surface of the pump chamber.
The pump according to any one of claims 8 to 11, wherein the impeller, the first valve body portion, and the second valve body portion are arranged coaxially.
The discharge port comprises a first discharge port and a second discharge port arranged at positions facing each other with the rotation axis of the first valve body portion interposed therebetween,
The first valve body portion is
Having a first opening, a second opening, and a third opening as the openings,
The shielding wall includes a first shielding wall, a second shielding wall, and a third shielding wall,
The first opening and the third opening are formed at positions facing each other across the rotation axis of the valve body,
The second opening is formed between the first opening and the third opening in the circumferential direction of the valve body,
The first shield wall extends between the first opening and the second opening,
The second shield extends between the second opening and the third opening,
The pump according to any one of claims 8 to 12, wherein the third blocking wall portion extends between the third opening portion and the first opening portion.
The second valve body portion is
Having a cylindrical shape,
provided coaxially with the first valve body,
having one or more shielding walls that close the suction port and one or more openings that open the suction port;
The blocking wall portion and the opening portion are arranged along the circumferential direction of the second valve body portion so that the suction port can be opened or closed depending on the rotational position of the second valve body portion,
The pump has a cylindrical suction chamber that slidably and rotatably accommodates the second valve body,
14. The pump according to any one of claims 8 to 13, wherein the two or more suction ports open to the inner peripheral surface of the suction chamber.
When the direction parallel to the rotation axis of the impeller is taken as the vertical direction,
The suction chamber is provided on the lower surface of the pump chamber,
15. The pump according to claim 14, wherein the electric motor is provided above the impeller.