KR102123442B1 - Diaphragm pump equipped with bldc motor - Google Patents

Abstract

The present invention is a BLDC diaphragm pump assembly mounted on a water purifier or the like to change the pressure in the pumping chamber using a diaphragm to sequentially open and close each check valve of the outer inlet and inner outlet to suck and discharge the fluid, thereby enabling the pumping supply of fluid. More specifically, by using a BLDC motor that raises and lowers the diaphragm, the durability is increased, and the discharge capacity of the fluid is increased according to the high-speed rotation of the BLDC motor. Or, it is related to the BLDC diaphragm pump assembly which is capable of precise speed control and has high energy efficiency.

Description

BLDC diaphragm pump assembly{DIAPHRAGM PUMP EQUIPPED WITH BLDC MOTOR}

The present invention is a BLDC diaphragm pump assembly mounted on a water purifier or the like to change the pressure in the pumping chamber using a diaphragm to sequentially open and close each check valve of the outer inlet and inner outlet to suck and discharge the fluid, thereby enabling the pumping supply of fluid. More specifically, by using a BLDC motor that raises and lowers the diaphragm, the durability is increased, and the discharge capacity of the fluid is increased according to the high-speed rotation of the BLDC motor. Or, it is related to the BLDC diaphragm pump assembly which is capable of precise speed control and has high energy efficiency.

In general, a diaphragm pump is used to pump fluid by forming a suction and discharge pressure of a fluid by changing a volume in a chamber using a diaphragm having elastic force, and a metal diaphragm made of a superalloy such as a cobalt group or a nickel group, and a general rubber material. The nonmetal diaphragm made is used.

As a related art, there is Japanese Patent Publication No. 10-2015-0085791,

In the prior art, a pumping piston is separately added to the upper portion of the piston portion of the diaphragm, and the bolt is coupled to the pumping piston and a circular pin for elevating and descending the diaphragm. The pumping piston comprises a circular pin of the diaphragm and mount. Simultaneous coupling and at the same time, the direction of the pressing force is changed according to the lifting movement of the diaphragm. In particular, the pumping piston seals the coupling hole of the diaphragm, which is bolted to the circular pin of the mount, to provide airtightness. To prevent leakage.

When the double plate structure composed of the pumping piston and the diaphragm is adopted as described above, it is possible to secure the solid assembly and airtightness of the parts, but there is a disadvantage that the manufacturing cost is inevitably increased due to the addition of the parts and the assembly is poor.

In particular, the prior art has a problem in that the performance of the pump is gradually lowered due to a decrease in durability as well as a decrease in performance due to the wear of the brush due to the use of a general brush motor, thereby making it impossible to perform precise speed control.

In addition, due to repeated elastic deformation of the diaphragm, there is a risk of fluid leakage due to wear on the piston portion or the coupling hole portion of the diaphragm where the pumping piston is assembled.

In addition, as can be seen in the prior art, when a part of the diaphragm is continuously raised and lowered by a cam member that is rotated by a motor, when the pressure of each pumping chamber is sequentially changed, suction and discharge of fluid is performed, the diaphragm is raised and lowered. Depending on the shape displacement, there is a problem in that there is a great risk of loss of airtightness due to damage such as opening of a bolted portion.

Accordingly, the present invention has been devised to solve the problems as described above,

Compared to the general brush motor, it increases the durability and increases the discharge capacity of the fluid due to the high-speed rotation of the BLDC motor.In addition, the noise does not increase or the performance does not decrease even when used for a long period of time compared to the general brush motor. It is an object of the present invention to provide a BLDC diaphragm pump assembly including a BLDC motor that raises and lowers the diaphragm to increase efficiency.

In addition, the present invention is inserted into each pumping chamber and bolted holes are inserted into each pumping chamber so as to secure assembly and manufacturing convenience while reducing the manufacturing cost by reducing the coupling parts while strengthening the coupling between the diaphragm and the pressure plate. A dome portion formed through, a bolt that is fitted into the bolt coupling hole to connect the diaphragm and the pressure plate, and is formed concave on the upper surface of the dome portion to accommodate the head of the bolt and the upper portion along the circumference of the bolt coupling hole at the bottom surface of the receiving groove An object of the present invention is to provide a BLDC diaphragm pump assembly, which is provided with a diaphragm that protrudes into and is in close contact with the head of the bolt.

And the present invention, to improve the suction and discharge of the fluid, especially the fluid discharge pressure and to improve the flow of the fluid to ensure the high pressure of the pumping pressure, as well as the opening and closing of the second check valve of the discharge hole can be made more precisely , A fan-shaped inner discharge portion having an inner edge is formed to be inclined downward inward, so that a fitting hole provided in the inner edge and a plurality of discharge holes provided in the outer arc portion are disposed, and the discharge holes are formed in a fan shape corresponding to the inner discharge portion. An object of the present invention is to provide a BLDC diaphragm pump assembly, which includes a second check valve made of a cover opening and a fitting protrusion which is provided at an inner edge of the opening and closing and fitted into the fitting hole.

In addition, the present invention, while firmly fixing the second check valve, the opening and closing of the opening/closing membrane is smoothly projected downward from the center of the discharge path of the upper housing toward the fitting hole to press the inner edge of the second check valve An object of the present invention is to provide a BLDC diaphragm pump assembly, which includes a fixing pin to fix the same.

Furthermore, in the present invention, in order to secure airtightness between the upper housing and the chamber housing, a sealing jaw protruding downward is provided inside the outer wall forming the accommodating portion of the upper housing, and a packing ring is provided between the upper edge of the chamber housing and the sealing jaw. It is an object of the present invention to provide a diaphragm BLDC pump assembly that is fitted and coupled.

In order to achieve the above object, the BLDC diaphragm pump assembly according to the present invention,

An upper housing having a flow path through which the introduced fluid is discharged;

A chamber housing coupled to the lower portion of the upper housing and having a plurality of pumping chambers radially arranged with an outer suction part connected to the inflow passage of the flow passage and an inner discharge part connected to the discharge passage of the flow passage;

A valve member comprising a first check valve that opens and closes the outer suction part and a second check valve that opens and closes the inner discharge part;

A diaphragm coupled to the lower portion of the chamber housing to shield the pumping chamber and to sequentially open and close each check valve by changing the pressure in the pumping chamber to form a pumping pressure in the pumping chamber;

A pressing plate having insertion bodies for elevating and descending the diaphragm, and cam members for sequentially elevating the insertion bodies through rotation; And

And a BLDC motor that rotates the cam member.

And in the BLDC diaphragm pump assembly according to the present invention,

The inner discharge portion is formed of a fan shape having an inner edge, a fitting hole formed in the inner edge portion, and a plurality of discharge holes formed in the outer arc portion and communicating with the pumping chamber,

The second check valve has a fan shape corresponding to the inner discharge portion, and an opening/closing membrane covering the plurality of discharge holes and a fitting protrusion protruding downward from an inner edge portion of the opening/closing membrane to fit into the fitting hole. Is done,

The upper housing is characterized in that it comprises a fixing pin that protrudes downward toward the fitting hole from the center of the discharge path and presses and fixes the inner edge of the second check valve.

Also in the BLDC diaphragm pump assembly according to the invention,

The diaphragm has a smaller diameter than the pumping chamber so as to be inserted into each pumping chamber, and is formed with a dome portion protruding upward and having a bolt coupling hole through the center, and a bolt inserted into the bolt coupling hole to join the diaphragm and the pressure plate, It characterized in that it comprises a receiving groove that is concavely formed on the upper surface of the dome portion to accommodate the head of the bolt, and a sealing jaw protruding upward along the periphery of the bolt coupling hole from the bottom surface of the receiving groove to closely contact the head of the bolt. Is done.

In addition, in the BLDC diaphragm pump assembly according to the present invention,

The upper housing is provided with a receiving portion for receiving the chamber housing and the diaphragm, and has a sealing jaw protruding downward along an outer wall inside the outer wall of the upper housing,

It characterized in that it further comprises a packing ring fitted between the upper edge of the chamber housing and the sealing jaw.

BLDC diaphragm pump assembly according to the present invention,

Due to the BLDC motor that raises and lowers the diaphragm, it increases durability and increases the discharge capacity of the fluid due to the high-speed rotation of the BLDC motor, and does not increase noise or deteriorate performance even when used for a long period of time compared to a regular brush motor. It is possible to increase energy efficiency,

By omitting a separate coupling part that connects the diaphragm and the pressure plate, the manufacturing cost is reduced and assembly and manufacturing convenience are secured.

The direction of the pressing force is changed to the dome portion of the diaphragm, and the airtightness is secured through the head contact between the sealing jaw and the bolt, preventing fluid from leaking into the bolt coupling hole of the diaphragm,

Precise opening and closing of the second check valve is achieved while improving the pumping pressure by improving the flow of the fluid through the inner discharge part and the second check valve which are inclined downward to correspond to the shape displacement of the diaphragm,

The second check valve is fixed through the fixing pin of the upper housing to secure the convenient assembly and assembling stability of the second check valve, which is difficult to adopt the bolt coupling structure.

Through the double sealing structure of the upper housing and the chamber housing using the sealing jaw and the packing ring, it is possible to completely block and prevent the leakage of fluid generated by the pumping pressure.

1A is an overall perspective view of a BLDC diaphragm pump assembly in accordance with the present invention.
1B is a cross-sectional view of the upper housing according to the invention.
Figure 2 is a perspective view of a main portion of the assembly of the BLDC diaphragm pump assembly according to the present invention.
Figure 3 is an exploded perspective view of Figure 2;
Figure 4 is a cross-sectional view of the main portion of the combined cross-sectional view and the operating state of Figure 2;
Figure 5 is a cross-sectional view for explaining the coupling structure of the chamber housing and the first check valve of the present invention.

The present invention can be applied to a variety of changes and can have a variety of forms, the implementation (態樣, aspect) (or embodiments) to describe in detail in the text. However, this is not intended to limit the present invention to a specific disclosure form, and it should be understood that all modifications, equivalents, and substitutes included in the spirit and scope of the present invention are included.

The same reference numbers in each drawing, especially the number of tens and ones, or the same number of tens, ones and alphabets refer to members having the same or similar functions, and unless otherwise specified, The member indicated by the reference number can be understood as a member conforming to these standards.

In addition, in each drawing, the components are exaggeratedly large (or thick) or smallly (or thinly) or simplified to express the size or thickness in consideration of convenience, etc., thereby limiting the protection scope of the present invention. It should not be.

The terminology used herein is only used to describe a specific embodiment (sun, 態樣, aspect) (or embodiment), and is not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise.

In the present application, terms such as ~include~ or ~consist of~ are intended to designate the existence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, and one or more other features. It should be understood that the existence or addition possibilities of fields or numbers, steps, actions, components, parts or combinations thereof are not excluded in advance.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person skilled in the art to which the present invention pertains. Terms such as those defined in a commonly used dictionary should be interpreted as having meanings consistent with meanings in the context of related technologies, and should not be interpreted as ideal or excessively formal meanings unless explicitly defined in the present application. Does not.

~ 1 ~, ~ 2 ~, etc. described in this specification will refer only to distinguish between different components, but are not limited to the order in which they are manufactured, and the names in the detailed description and claims of the invention It may not match.

In the description of the diaphragm assembly according to the present invention, for convenience, a rough direction standard that is not strict is specified with reference to FIGS. 2 and 3, and the direction in which gravity acts is determined downward, left, right, left, and other directions In the detailed description and claims of the invention related to the drawings, directions are specified according to this standard unless otherwise specified.

Hereinafter, a BLDC diaphragm pump assembly according to the present invention will be described with reference to the accompanying drawings.

The present invention is a BLDC diaphragm pump assembly mounted on a water purifier or the like to change the pressure in the pumping chamber using a diaphragm to sequentially open and close each check valve of the outer inlet and inner outlet to suck and discharge the fluid, thereby enabling the pumping supply of fluid. As for,

1A to 5, the upper housing 10, the chamber housing 20, the lower housing 30, the valve member 40, the diaphragm 50, the pressure plate 60, the BLDC motor ( 70).

The upper housing 10 is provided with a flow path through which the sucked fluid is discharged, an inlet 11 is provided on one side, an outlet 12 is provided on the other side, and an inlet 11 and an outlet 12 as flow paths are provided. ) Is provided with an inlet path 13 and an outlet path 14.

In particular, the inflow passage 13 and the discharge passage 14 of the upper housing 10 are arranged in a concentric circle shape on the inside and outside of the circle, so that the inlet 11 is connected to the inflow passage 13 and the outlet to the discharge passage 14 (12) is connected, and the inlet passage 13 and the outlet passage 14 are in communication with the lower receiving portion 15 to the chamber housing 20 and the diaphragm 50 accommodated in the receiving portion 15 By shielding each other.

Reference numeral 14A in FIG. 1B is a conduit that penetrates the outer inflow passage 13 to connect the inner discharge passage 14 and the outlet 12.

In addition, although not shown in the drawing, the inlet 11 and outlet 12 may be provided with a fitting capable of fixing a tube such as a hose with a tooth bite.

In addition, the upper housing 10 is provided with a sealing jaw 17 protruding downward along the outer wall inside the outer wall forming the receiving portion 15,

The chamber housing 20 further comprises a packing ring 18 fitted between the upper rim of the chamber 20 (that is, the area surrounding all the outer surfaces of each outer suction part 21) and the sealing jaw 17,

The diaphragm 50 in close contact with the inner surface of the outer wall of the chamber housing 20 and the packing ring 18 form a double sealing structure, thereby preventing the fluid sucked into the pumping chamber 23 from leaking to the outside.

The chamber housing 20 is coupled while being accommodated in the lower portion of the upper housing 10, in particular, the receiving portion 15, the outer suction portion 21 connected to the inflow path 13 of the flow path and the discharge of the flow path A plurality of pumping chambers 23 having an inner discharge portion 22 connected to the furnace 14 are arranged in a circular shape.

That is, each pumping chamber 23 has a plurality of circular arrangements centered around the center of the upper housing 10, so that the outer outer suction part 21 is connected to the inflow passage 13 of the upper housing 10, and the inner It can be seen that the inner discharge part 22 is connected to the discharge passage 14 of the upper housing 10, and in the figure, three pumping chambers 23 are arranged in a triangle.

In particular, the outer suction portion 21 is arranged radially around the inner discharge portion 22 formed in the center of the upper housing 10, each outer suction portion 21 is made of a circular shape, the inner center A through hole (21a) formed through the upper surface of the chamber housing 20, and a plurality of inlet holes (21b) arranged in a circle through the upper surface of the chamber housing (20) along the outer periphery of the through hole (21a) It consists of,

The discharge path 14 is provided in the center of the upper housing 10, each inner discharge portion 22 is made of a fan shape having an inner edge, the upper surface of the chamber housing 20 in the inner edge It consists of a fitting hole (22a) formed through a part, and a plurality of discharge holes (22b) arranged in an arc shape on the outer arc portion through the upper surface of the chamber housing (20),

The inlet hole (21b) and the outlet hole (22b) are all in communication with the lower pumping chamber 23, the inlet (11)-inlet passage (13)-inlet hole (21b)-pumping chamber (23)-outlet hole (22b)-discharge path 14 (pipe line)-discharge port 12 forms one flow path.

In addition, a first opening/closing membrane 41A of the first check valve 41 is provided on the inner upper surface of the pumping chamber 23 by extending outward from the through hole 21a and forming a concave portion 21c concave in a dome shape. It is accommodated in the concave portion 21c.

In addition, each pumping chamber 23 is formed by opening the lower surface and is shielded while the pumping chambers 23 are partitioned from each other by a diaphragm 50 coupled to the lower portion.

The lower housing 30 is coupled to the lower portion of the upper housing 10, and the chamber housing 20 and the diaphragm 50 are accommodated in the upper and lower housings 10 and 30.

In the lower housing 30, a plurality of insertion portions 31 corresponding to the respective pumping chambers 23 are formed through, and the insertion body 61 protruding from the upper surface of the lower pressure plate 60 is inserted into each of the lower housings 30. It is coupled to be inserted into the portion 31, wherein the inner diameter of each insertion portion 31 is formed larger than the outer diameter of the insertion body 61, the insertion body 61 within the insertion portion 31 inclined to win Make the descent possible.

The valve member 40 comprises a first check valve 41 that opens and closes the outer suction part 21 and a second check valve 42 that opens and closes the inner discharge part 22.

The first and second check valves 41 and 42 flow the fluid in one direction, that is, the first check valve 41 flows from the inflow passage 13 toward the pumping chamber 23, and the second check valve ( 42) is to control the fluid to flow from the pumping chamber 23 in the direction of the discharge path 14, the first and second opening and closing membranes 41A and 42A made of synthetic resin material such as rubber capable of elastic deformation in the drawing. First and second check valves equipped with (41, 42) can be confirmed,

At this time, in consideration of the flow direction of the fluid, the first check valve 41 is coupled such that the first opening/closing membrane 41A is disposed inside the pumping chamber 23, and the second check valve 42 has a second opening/closing membrane ( 42A) is provided to be disposed outside the pumping chamber 23, that is, in the discharge path 14.

More specifically, the first check valve 41 has a circular shape corresponding to the outer suction part 21, a first opening and closing membrane 41A covering the plurality of inlet holes 21b, and the first The upper surface of the outer suction part 21 protruding upwardly from the center of the upper surface of the opening/closing membrane 41A to fit into the through hole 21a, and protruding outward from the outer circumferential surface of the pillar part 41B It is made of a locking portion (41C) for engaging the locking to secure the first check valve (41).

In addition, the pillar portion 41B of the first check valve 41 is formed to extend upward from the locking portion 41C (that is, the locking portion 41C is provided at an intermediate height of the pillar portion 41B). It has a pillar extension (41B') that can be fitted into the through-hole (21a), the engaging portion (41C) is made of a conical shape that narrows the width toward the upper side,

The outer suction part 21 by forcing the conical locking portion 41C into the through hole 21a in a state where the pillar extension portion 41B' is fitted into the through hole 21a through the lower opening portion of the pumping chamber 23 The first check valve 41 is assembled by engaging the engaging portions 41C and the first opening/closing membrane 41A on the upper and lower surfaces, respectively, and by cutting and removing the pillar extension portion 41B' after assembly, The first check valve 41 made of an elastic material can be firmly coupled to the outer suction part 21 without using a separate bolt member.

In addition, the second check valve 42 has a fan shape corresponding to the inner discharge portion 22, a second opening/closing membrane 42A covering the plurality of discharge holes 22b, and the second opening/closing membrane ( It consists of a fitting projection (42B) that protrudes downward from the inner corner portion of 42A) and fits into the fitting hole (22a).

In addition, the second check valve 42 is formed in an arc shape at a position corresponding to the discharge hole 22b along the outer arc portion of the second opening/closing membrane 42A, and the reinforcement portion 42a formed to be thicker than the rest of the portion ) Is provided, the second opening and closing membrane 42A is rolled into the discharge hole 22b to prevent the sealing function of the discharge hole 22b from being lost or the second opening and closing membrane 42A to be damaged.

In addition, like the first check valve 41, without using a separate bolt member, the second check valve 42 made of an elastic material can be firmly coupled to the inner discharge part 22,

The upper housing 10 protrudes downward from the center of the discharge path 14 toward the fitting hole 22a and has an inner edge portion (that is, a fitting protrusion 42B) of the second check valve 42. It comprises a fixing pin 16 for pressing and fixing the formed second opening and closing film 42A).

Particularly, the fixing pin 16 includes, among the upper surfaces of the second opening and closing membrane 42A, protrusions 16a for pressing and fixing both sides of the fitting protrusions 42B, and grooves 16b formed between the protrusions 16a. ), even if the fixing pin 16 is fixed by pressing the second check valve 42, the second opening and closing membrane 42A is elastically deformed while being bent upward, and the fixing pin 16 is checked at the second time. Do not interfere with the opening operation of the valve 42.

The present invention of such a configuration,

When the pressure in the pumping chamber 23 is lowered by the diaphragm 50, a pressing force that is sucked into the pumping chamber 23 is generated downward, and the first opening/closing film 41A is opened in the concave portion 21c. At the same time as the inlet holes 21b are opened, the second opening/closing membrane 42A closes the outer suction part 21 and closes the outlet holes 22b,

Conversely, when the pressure in the pumping chamber 23 rises by the diaphragm 50, a pressing force discharged to the outside of the pumping chamber 23 is generated upward, so that the second opening/closing film 42A is in close contact with the recess 21c. At the same time, while closing the inlet hole 21b, the second opening/closing membrane 42A opens at the outer suction part 21 and opens the discharge holes 22b,

The fluid sucked through the inlet 11, through the inlet passage 13, the inlet hole 21b, the pumping chamber 23, the outlet hole 22b, and the outlet passage 14 in order to increase the pressure to a high pressure while exiting the outlet It is discharged to (12), and a pumping action is performed for the fluid.

The diaphragm 50 is coupled to the lower portion of the chamber housing 20 to shield the pumping chamber 23 and sequentially change the pressure in the pumping chamber 23 to open and close each check valve 41 and 42 sequentially. By forming a pumping pressure in the pumping chamber 23,

As shown in the figure, the three pumping chambers 23 arranged in a triangle are formed in a triangular shape so as to be shielded at once, and the receiving portion 15 of the upper housing 10 is also formed in a triangular shape corresponding to the diaphragm 50 .

The diaphragm 50 has a smaller diameter than the pumping chamber 23 so as to be inserted into each pumping chamber 23 and protrudes upward and has a dome portion 51 formed through a bolt coupling hole 51a in the center, The bolt 52 is inserted into the bolt coupling hole 51a to join the diaphragm 50 and the pressure plate 60, and is formed concave on the upper surface of the dome portion 51 to accommodate the head of the bolt 52 It includes a groove 53 and a sealing jaw 54 protruding upward from the bottom surface of the receiving groove 53 along the circumference of the bolt coupling hole 51a to be in close contact with the head of the bolt 52.

The dome portion 51 is a first check valve 41 by switching the direction of the pressing force generated according to the pressure change in the pumping chamber 23 with the head of the bolt 52 coupled to the receiving portion 15 up and down ) Or any of the second check valves 42 to be opened and closed to function as a kind of pressure piston.

The bolt coupling hole 51a penetrates through the center of the dome portion 51 and communicates with the bolt fastening hole 61a provided in the insertion body 61 of the pressure plate 60, so that the screw portion of the bolt 52 is bolted By passing through the ball 51a and being screwed to the bolt fastening hole 61a, the insert body 61 of the diaphragm 50 and the pressure plate 60 is mutually coupled by the bolt 52.

The sealing jaw 54 is formed to protrude in an annular shape to the outside of the bolt coupling hole (51a), when the bolt 52 is tightened to the bolt fastening hole (61a) is in close contact with the lower surface of the head of the bolt (52) (15) The airtightness between the bolt coupling hole (51a) is secured to prevent the fluid from leaking into the bolt coupling hole (51a).

The diaphragm 50 of this structure, like a conventional diaphragm pump, does not require a pumping piston for bolting between the diaphragm and the circular pin of the mount, thus reducing manufacturing cost and improving assembly and manufacturing convenience. With the same function as the pumping piston of, the pumping discharge is possible by changing the pressure direction. At this time, the airtightness of the diaphragm 50 is secured by the sealing jaw 54, thereby preventing the leakage of fluid due to the unused pumping piston. It works.

The pressing plate 60 is to raise and lower the diaphragm 50, and specifically, includes a plurality of insertion bodies 61 protrudingly inserted into the insertion portion 31, such an insertion body 61 ) Likewise, the insertion part 31 is triangularly arranged.

And each insertion body 61 is provided with a bolt fastening hole (61a) formed through the center is screwed to the screw portion of the bolt 52, the rotation axis of the BLDC motor 70 is coupled to the lower center of the pressure plate (60) The cam member 62 is provided, and a bearing 63 for supporting the cam member 62 is provided.

The cam member 62 is the thickness of the outer circumferential surface is formed thickly in one circumferential direction around the central axial hole, and the position of the wide portion having a large thickness changes while rotating by the motor to insert the body 61 of the pressure plate 60 By continuously raising and lowering them, the lifting and lowering of the dome portion 51 located in each pumping chamber 23 is made.

That is, the cam member 62 has one outer circumferential surface is formed thicker than the other outer circumferential surface so that the shaft hole is inclined to one side when coupled to the bearing 63, and the motor is connected to the BLDC motor 70 by combining the rotation axis of the motor with the shaft hole. When assembled, the insertion body 61 of the pressing plate 60 where the wide portion is located protrudes upwards than the other insertion bodies 61 as the axial holes are erected in the vertical direction.

When the motor rotates in this state, as the position changes while the wide part rotates along the bearing 63, the insert body 61 passing through the wide part rises, and the insert bodies 61 passing through the rest of the narrow parts except for the wide part descend. , Insertion body 61 of the pressure plate 60 is repeatedly repeated in the form of an approximate wave.

The insertion and lowering of the insertion body 61 raises and lowers the dome portion 51 of the diaphragm 50 coupled to each insertion body 61, and thus the pressure in the pumping chamber 23 by the lowering of the dome portion 51. As the first check valve 41 opens and the second check valve 42 is closed, fluid flows into the pumping chamber 23, and the pressure in the pumping chamber 23 is increased by the rise of the dome 51. As the first check valve 41 is raised and closed, the second check valve 42 is opened to discharge the fluid introduced into the pumping chamber 23.

At this time, each insertion body 61, the inner portion of the lower surface is made of an inclined surface portion 61A formed to be inclined upward inward, so that the inner lower surface of the insertion body 61 contacts the bearing 63 and/or the cam member 62 Do not.

That is, while the cam member 62 is rotated by a motor, the pressing plate 60, that is, the insertion bodies 61 are continuously inclined inwards in a state in which they are not rotated, and the bar is continuously inserted and inserted. ) Is made of a general cylindrical shape, so as to come into contact with the rotating cam member 62, in order to prevent this, it is necessary to form a wide gap between the inserting bodies 61, the present invention provides this through the inclined surface portion 61A. By preventing, it is possible to miniaturize the entire pressure plate 60 and further the BLDC diaphragm pump assembly.

The BLDC motor (70, Brushless Direct Current motor) is provided under the lower housing 30 to rotate the cam member 62, and is mounted inside a separate motor housing to force the upright of the motor. , In some cases, the case of the motor itself may replace the motor housing. In the drawings of the present specification, an exemplary embodiment in which the BLDC motor 70 is directly connected to the lower portion of the lower housing 30 is directly upright is illustrated.

The BLDC motor 70 includes a rotor (permanent magnet) and a stator (electromagnet), and the coils collide with the coils facing each other, and the currents flowing between the coils facing each other flow in the same direction, and the N and S poles are connected. It is characterized by the fact that the N and S poles of the rotor are pulled by the stator, and the stator creates a magnetic field in the opposite direction, pushing the rotor to rotate the rotating shaft. There is, and the detailed configuration of such a BLDC motor is a known technique, and detailed description is omitted.

The present invention, in the conventional diaphragm pump assembly, without using a general brush motor, by adopting the BLDC motor 70 to prevent the durability decrease and noise increase and performance degradation due to brush wear, and the use of fluid using high-speed rotation Energy efficiency can be increased by increasing the discharge capacity and precise speed control, and there is an advantage that the rotational direction of the rotating shaft can be easily changed by an electronic transmission.

In particular, the diaphragm pump assembly generates a pumping pressure through repeated and sequential lifting and lowering of the diaphragms 50, and when the discharge of the fluid is maintained for a long time, such as a water purifier, the general brush motor rotates the cam member 62. There is a problem of frequent replacement of parts due to poor durability, and noise and performance deterioration. The present invention solves the above problems with the use of the BLDC motor 70, thereby providing quietness to the water purifier and improving durability. It provides an effect that can be used safely and conveniently.

In the above, in describing the present invention, the BLDC diaphragm pump assembly having a specific shape and structure has been mainly described with reference to the accompanying drawings, but the present invention is capable of various modifications, changes, and substitutions by those skilled in the art. Should be interpreted as belonging to the protection scope of the present invention.

10: upper housing 11: inlet
12: outlet 13: inlet
14: discharge path 15: receiving portion
16: fixing pin 17: sealing jaw
18: packing ring
20: chamber housing 21: outside suction
21a: through hole 21b: inlet hole
22: inner discharge portion 22a: fitting hole
22b: outlet 23: pumping chamber
30: lower housing 31: insert
40: valve member 41: first check valve
41A: 1st opening curtain 41B: Column
41C: engaging portion 42: second check valve
42A: second opening and closing membrane 42B: fitting projection
42a: reinforcement
50: diaphragm 51: dome
51a: bolt coupling hole 52: bolt
53: receiving groove 54: sealing jaw
60: pressure plate 61: insertion body
61a: bolt fastener 61A: slope
62: cam member 63: bearing
70: BLDC motor

Claims (4)

An upper housing having a flow path through which the introduced fluid is discharged;
A chamber housing coupled to the lower portion of the upper housing and having a plurality of pumping chambers radially arranged with an outer suction part connected to the inflow passage of the flow passage and an inner discharge part connected to the discharge passage of the flow passage;
A valve member comprising a first check valve that opens and closes the outer suction part and a second check valve that opens and closes the inner discharge part;
A diaphragm coupled to the lower portion of the chamber housing to shield the pumping chamber and to sequentially open and close each check valve by changing the pressure in the pumping chamber to form a pumping pressure in the pumping chamber;
A pressing plate having insertion bodies for elevating and descending the diaphragm, and cam members for sequentially elevating the insertion bodies through rotation; And
BLDC motor for rotating the cam member; includes,
The inner discharge portion is formed of a fan shape having an inner edge, a fitting hole formed in the inner edge portion, and a plurality of discharge holes formed in the outer arc portion and communicating with the pumping chamber,
The second check valve has a fan shape corresponding to the inner discharge portion, and an opening/closing membrane covering the plurality of discharge holes and a fitting protrusion protruding downward from an inner edge portion of the opening/closing membrane to fit into the fitting hole. Is done,
The upper housing is projected downward toward the fitting hole from the center of the discharge path, characterized in that it comprises a fixing pin for pressing and fixing the inner edge of the second check valve, BLDC pump assembly.
delete According to claim 1,
The diaphragm has a smaller diameter than the pumping chamber so as to be inserted into each pumping chamber, and is formed with a dome portion protruding upward and having a bolt coupling hole through the center, and a bolt inserted into the bolt coupling hole to join the diaphragm and the pressure plate, It characterized in that it comprises a receiving groove that is concavely formed on the upper surface of the dome portion to accommodate the head of the bolt, and a sealing jaw protruding upward along the periphery of the bolt coupling hole from the bottom surface of the receiving groove to closely contact the head of the bolt. Made with, BLDC pump assembly.
The method of claim 1 or 3,
The upper housing is provided with a receiving portion for receiving the chamber housing and the diaphragm, and has a sealing jaw protruding downward along an outer wall inside the outer wall of the upper housing,
BLDC pump assembly, characterized in that it further comprises a packing ring fitted between the upper rim of the chamber housing and the sealing jaw.

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