KR20190066681A

KR20190066681A - Pump for Circulating Water

Info

Publication number: KR20190066681A
Application number: KR1020170166351A
Authority: KR
Inventors: 장정철; 이경주; 강민석
Original assignee: 뉴모텍(주)
Priority date: 2017-12-06
Filing date: 2017-12-06
Publication date: 2019-06-14
Also published as: WO2019112156A1; KR101995436B1

Abstract

The present invention provides a circulation pump for hot water, capable of stably rotating an impeller and preventing noise of the impeller by effectively discharging the pressure of air and a fluid generated in an inner space of the impeller. According to the present invention, the circulation pump for hot water comprises: an upper housing (10) having an inlet (11) and an outlet (12) of the fluid; a lower housing (20) connected to the upper housing (10) and including a stator (70) therein; an inner housing (30) installed on the inner side of the lower housing (20); the impeller (50) installed to form a flow path (40) which is a space formed with the inner bottom of the inner housing (30); and a rotor (60) installed in the impeller (50). The impeller (50) has a cavity (52) formed in the longitudinal direction therein, and multiple lower holes (57B) are formed at the lower part of the cavity (52). Multiple long holes (52A) are formed on a side of the cavity (52). The fluid collected in the flow path (40) flows into the cavity (52) through the lower hole (57B), and is discharged to the outlet (12) through the long hole (52A).

Description

[0001] Pump for Circulating Water [

The present invention relates to a hot water circulation pump. More particularly, the present invention relates to a hot water circulation pump capable of effectively removing bubbles generated inside a pump and effectively discharging a fluid located under the impeller, thereby reducing noise through stable operation of the impeller.

Generally, a low-pressure boiler or a hot water mat has a hot water circulation pump for circulating heated hot water. Such a hot water circulating pump is applied to the same principle as a motor. An impeller including a rotor serves to discharge hot water introduced into an inlet through an outlet while rotating by electromagnetic interaction with a stator.

A prior art for a hot water circulation pump is Korean Patent No. 10-1204344. In this prior art, the hot water introduced into the inlet port formed on the upper portion of the hot water circulation pump is discharged to the outlet port formed on the side surface by the rotation of the impeller. On the other hand, the hot water flowing between the lower part of the impeller and the inner housing moves upward through a flow path formed vertically through the impeller, and is discharged to the discharge port together with the hot water flowing from the upper part of the impeller blade. The discharge hole ensures stable rotation of the impeller and prevents the impeller from rising.

However, in this prior art, since the fluid that has risen by the discharge hole collides with the fluid flowing in the upper portion from the inside of the impeller, the rotation of the impeller may become somewhat unstable, and furthermore, When I do, I get an unpleasant noise similar to the sound I hear. Since the hot water circulating pump is used in a hot water mat, the unpleasant noise generated at the time of sleep interferes with the sleeping surface, and the quality of the hot water mat is deteriorated.

Further, in the prior art, the direction of the flow of the fluid flowing from the shaft portion and the inner space of the impeller is changed on the suction port side. In the space where the direction is changed, bubbles are generated and noise is generated.

In order to solve such a problem, the present inventor proposed a hot water circulation pump of a new structure capable of smoothly flowing air and fluid inside the impeller and preventing the generation of bubbles in a space where the inflow direction of the flowing fluid changes do.

1. Korean Patent Registration No. 10-1204344

2. Japanese Laid-Open Patent Application No. 2010-7642

SUMMARY OF THE INVENTION It is an object of the present invention to provide a hot water circulation pump capable of effectively discharging fluid and air pressure generated in an inner space of an impeller, thereby preventing stable rotation and noise of the impeller.

Another object of the present invention is to provide a hot water circulation pump capable of preventing the generation of bubbles in a space in which the direction of the inflow fluid is switched.

The above objects and other intrinsic objects of the present invention can be easily achieved by the present invention described below.

The hot water circulation pump according to the present invention

An upper housing (10) having a fluid inlet (11) and an outlet (12);

A lower housing 20 coupled to the upper housing 10 and having a stator 70 installed therein;

An inner housing 30 installed inside the lower housing 30;

An impeller (50) positioned to form a flow path (40) which is a space defined by an inner bottom surface of the inner housing (30); And

A rotor 60 installed inside the impeller 50;

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The impeller (50) has a cavity (52) formed therein in the longitudinal direction,

A plurality of long holes 52A are formed in the side surface of the cavity 52 so that fluid gathering in the flow passage 40 is formed in the lower portion of the cavity 52. [ And flows into the cavity 52 through the hole 57B to be discharged toward the discharge port 12 through the slot 52A.

In the present invention, it is preferable that the suction port 11 is partitioned by a plurality of partition walls 11A, and one of the plurality of partition walls has a subsidiary partition wall 11D extending downward.

In the present invention, it is preferable that the auxiliary partition wall 11D has a sub-partition wall protrusion 11E protruding inwardly and formed in the longitudinal direction.

The hot water circulation pump according to the present invention

An upper housing (10) having a fluid inlet (11) and an outlet (12);

An impeller (50) positioned to form a flow path (40) which is a space defined by an inner bottom surface of the lower housing (20); And

A rotor 60 installed inside the impeller 50;

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The hot water circulation pump according to the present invention

An upper housing (10) having a fluid inlet (11) and an outlet (12);

An inner housing 30 installed inside the lower housing 30;

A rotor (60) provided inside the impeller (50)

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The inside of the suction port 11 is partitioned by a plurality of partition walls 11A and one of the plurality of partition walls has a subsidiary partition 11D extending downward.

The hot water circulation pump according to the present invention

An upper housing (10) having a fluid inlet (11) and an outlet (12);

A rotor (60) provided inside the impeller (50)

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The present invention can effectively discharge the pressure of the fluid and the air generated in the inner space of the impeller, thereby preventing stable rotation and noise of the impeller. Also, by applying a new structure to the portion where the fluid is introduced, It is possible to prevent the occurrence of air bubbles in the space where the air is to be converted.

1 is a perspective view of a hot water circulation pump according to the present invention.
FIG. 2 is a perspective view of the hot water circulation pump according to the present invention in exploded view.
3 is a perspective view of the impeller of the hot water circulation pump according to the present invention when viewed from above.
4 is a perspective view of the impeller of the hot water circulation pump according to the present invention viewed from the lower side.
5 is an exploded perspective view of the impeller lower cover in FIG.
6 is a perspective view showing the impeller lower cover of the present invention.
7 is a cross-sectional view of a hot water circulation pump according to the present invention.
8 is a bottom view of an upper housing of a hot water circulation pump according to the present invention.
9 is a perspective view illustrating an upper housing of a hot water circulation pump according to the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view showing a hot water circulating pump 100 according to the present invention, and FIG. 2 is a perspective view showing a hot water circulating pump 100 in an exploded state.

1 and 2, a hot water circulation pump according to the present invention includes an upper housing 10, a lower housing 20, an inner housing 30, a flow path 40, an impeller 50, a rotor 60 A stator 70, a printed circuit board 80, and a connector 90. As shown in Fig.

The upper housing 10 is coupled to the upper portion of the lower housing 20 or the inner housing 30 and has a suction port 11 through which a fluid flows in the central portion. The fluid introduced into the inlet 11 is discharged to the outlet 12 by the operation of the impeller 50. The fluid introduced into the inlet 11 is symmetrically installed inside the inlet 11 and flows into the impeller 50 through the plurality of partitions 11A defining the interior space of the inlet 11. [

The lower housing 20 is provided with a stator 70 inside thereof. The stator 70 comprises a core 71 and upper and lower insulators 72 and 73 which are respectively coupled to the upper and lower portions of the core 71. A coil (not shown) is wound on the stator 70 and electrically connected to the printed circuit board 80. A power source from the outside is applied to the printed circuit board 80 through the power source connector 90. Preferably, the lower housing 20 of the present invention is made of plastic resin by insert injection molding while the stator 70 and the printed circuit board 90 are placed on the injection mold.

The inner housing 30 is coupled between the upper housing 10 and the lower housing 20. The inner housing 30 has an impeller receiving portion 31 in which an impeller 50 is disposed. In the present invention, the inner housing 30 may function as the lower housing 20 according to design needs. That is, the inner housing 30 is not provided, and the impeller 50 may be located inside the lower housing 20.

The flow path 40 refers to the space between the lower surface of the impeller 50 and the lower surface of the interior of the inner housing 30. [ The flow path 40 refers to the space between the lower surface of the impeller 50 and the lower surface of the interior of the lower housing 20 when the inner housing 30 is not provided. When the hot water circulation pump 100 operates, warm water or air flows into the flow path 40. When the inflow amount of the fluid increases, the impeller rises due to the pressure, which may cause malfunction or noise of the pump . The present invention has a structure for effectively discharging the fluid in the flow path 40, which will be described below again.

The impeller 50 is located inside the lower housing 20 or in the impeller receiving portion 31 of the inner housing 30 and at the inner side of the stator 70. The impeller 50 has an impeller body 51 for accommodating the rotor 60 inside and a circular support plate 54 having a plurality of blade pieces 53 formed thereon. The rotating shaft 55 is located at the center of the impeller 50. A shaft support member 51C coupled to the center of the impeller 50 is rotatably coupled to the circumference of the rotation shaft 55. [ Between the impeller body 51 and the foot plate 54 is referred to as an impeller middle body 51D. An impeller upper cover 56 is coupled to an upper portion of the plurality of blade pieces 53 and an impeller lower cover 57 is coupled to a lower portion of the impeller body 51.

A plurality of coupling bosses 56A protruding downward are formed in the impeller upper cover 56. The coupling bosses 56A are coupled to the coupling holes 53A formed on the upper portion of the impeller blade piece 54. [ A center hole 57A through which the rotating shaft 55 passes is formed at the center of the impeller lower cover 57 and a lower hole 57B through which the fluid in the flow path flows into the inner space of the impeller 50 is formed .

The rotor 60 is preferably a ring magnet and is fixed to the rotor accommodating portion 58 formed inside the impeller body 51 and is located inside the stator 70 and is energized when power is applied to the stator 70. [ Thereby providing the rotational force of the impeller 50. [0050]

FIG. 3 is a perspective view of the impeller 50 of the hot water circulation pump 100 according to the present invention viewed from the upper side, FIG. 4 is a perspective view from the lower side, and FIG. 5 is an exploded perspective view of the impeller lower cover 57 Fig. 6 is a perspective view showing the impeller lower cover 57 of the present invention. Fig.

3 to 6, the impeller 50 of the hot water circulation pump 100 according to the present invention includes an impeller body 51, a cavity 52, a blade piece 53, a plate 54, A cover 56, and an impeller lower cover 57.

The impeller body 51 is a lower portion of the impeller, and a rotor accommodating portion 58 is formed inside the impeller body 51. The rotor (60) is received and fixed in the rotor accommodating portion (58). The rotor accommodating portion 58 receives the rotor 60 therein. A cavity 52 is formed on the outer side of the rotor accommodating portion 58 in the inner direction of the rotor 60. The cavity 52 has a planar area larger than the planar area of the lower hole 57B into a space where the fluid flowing into the lower hole 57B moves or moves. The cavity 52 extends in the longitudinal direction and is formed from the lower portion of the impeller body 51 to the upper portion of the impeller middle body 51D. The top surface of the cavity 52 is communicated with the top hole 54A. The area of the top surface of the top hole 54A is smaller than that of the cavity 52 like the bottom hole 57B. In the present invention, cavity 52 is not a simple fluid passage. In the prior art, a passage for discharging the pressure of the flow path 40 is formed, which makes it difficult to solve the problem of rising of the impeller due to an abrupt pressure increase. Therefore, the cavity 52 can secure a larger space to ensure stable rotation of the impeller even with a sudden increase in pressure.

On the other hand, the side surface of the impeller middle body 51D has a plurality of elongated holes 52A formed in the longitudinal direction. Although the upper hole 54A, the long hole 52A and the lower hole 57B are preferably located on the same longitudinal line and the number of the upper hole 54A is three in a symmetrical position with respect to the center of the axis of rotation, But is not limited to dogs. However, for stability of rotation, it is preferable that the position is formed at a position symmetrical with respect to the rotation axis.

At the center of the impeller 50, an axial insertion portion 58A is formed in the longitudinal direction. A shaft supporting member 51C such as a bearing is coupled and fixed to the shaft insertion portion 58A. A plurality of fitting holes 58B are formed on the outer periphery of the shaft insertion portion 58A and connected to the outer side of the rotor accommodating portion 58 to define the cavity 52 in the longitudinal direction. Although the number of the plurality of fitting holes 58B is three, it is not limited to this number. The fitting protrusion 57C projecting upward from the impeller lower cover 57 is engaged with the fitting hole 58B so that the impeller lower cover 57 is coupled to the impeller body 51. [

The upper shaft portion 11B of the upper housing 10 is positioned in the through hole 56B at the center of the impeller upper cover 56 and the fluid flows into the hot water circulating pump 100 through the through hole 56 do. The introduced fluid is discharged to the discharge port 12 by the rotation of the impeller blade piece 53 through the through hole 56B of the impeller upper cover 56. [ At this time, some of the fluid is not discharged toward the discharge port 12 but flows through the impeller body 50 through the inflow path 51B, which is a path between the lower portion of the support plate 54 of the impeller 50 and the inner housing 30 or the lower housing 20. [ 51 into the flow path 40 at the lower portion thereof.

The impeller lower cover 57 has a center hole 57A through which the rotary shaft 55 passes and a plurality of lower holes 57B communicating with the cavity 52 are symmetrical around the center hole 57A . The plurality of fitting projections 57C projecting upward are fitted in the fitting holes 58B of the impeller body 51. [ The impeller lower cover 57 has a plurality of lower blade pieces 57D protruding upward. The lower blade piece 57D serves to smooth the discharge of the fluid located in the cavity 52. [ The number of lower blade pieces 57D is shown in FIG. 6, but the number is not necessarily limited to three, and the number of lower blade pieces 57D can be determined as needed. However, it is preferable that the position is formed at a symmetrical position with respect to the center.

7 is a cross-sectional view of a hot water circulation pump 100 according to the present invention. 7, the shaft support member 51C, which is fixedly inserted into the center of the impeller 50, is rotatably coupled to the rotation shaft 55. As shown in Fig. The upper portion of the rotary shaft 55 is coupled to and fixed to the upper shaft insertion portion 11C of the upper shaft support portion 11B and the lower portion of the rotary shaft 55 is engaged with the lower shaft insertion portion 32A of the lower shaft support portion 32 And is fixed. If the lower housing 20 serves as the inner housing 30 without using the inner housing 30, the lower shaft support portion 32 and the lower shaft insertion portion 32A can be inserted into the inner portion of the lower housing 20 Respectively.

The operation of the hot water circulation pump 100 according to the present invention will be described with reference to FIG.

The fluid introduced into the inlet 11 of the upper housing 10 flows into the interior of the hot water circulation pump 100 in the direction of C shown. The flow of the inflow fluid passes through the partition 11A inside the inlet port 11 and the direction of flow thereof is changed by the rotation of the blades 53 of the impeller 50 to be discharged toward the outlet port 12. [ A part of the inflow fluid is not directly discharged to the discharge port but flows into the flow path 40 under the impeller lower cover 57 through the inflow path 51B, the impeller middle body 51C and the circumferential portions of the impeller body 51 do.

The pressure of the lower portion of the impeller 50 due to the fluid becomes higher as the fluid is collected in the flow path 40, and the impeller 50 is subjected to the upward force, so that the impeller may not rotate smoothly or noise may be generated during operation. In order to solve this problem, a longitudinal cavity 52 is formed inside the impeller 50, and the fluid in the flow path 40 is introduced into the cavity 52 through the lower hole 57B. The fluid collected in the cavity 52 moves upward again and is discharged to the upper portion through the elongated hole 52A formed on the side of the impeller middle body 51C and finally the impeller blade piece 53, and discharged to the discharge port 12. [0050] The part where the fluid of the two paths is mixed is called the mixing space S. In the present invention, since the mixing space S is formed on the side of the external discharge port 12 rather than the inside of the impeller, the operation of the stable impeller is ensured and the generation of noise can be prevented.

On the other hand, in order to prevent a pressure rise in the cavity 52 and balance the pressure around the impeller blade piece 53 and the pressure in the cavity 52, the upper plate 54 on the upper side of the cavity 52 is provided with an upper hole 54A . With this structure, the present invention forms a smooth fluid flow to ensure stable operation of the impeller and to prevent the generation of unnecessary noise.

The fluid flowing into the hot water circulation pump 100 is changed in direction by the impeller blade piece 53 when passing through the partition wall 11A in the inlet port 11. Bubbles are generated in the switched portion and noise do. The structure for preventing this will be described again with reference to FIGS. 8 and 9. FIG.

8 is a bottom view showing an upper housing 10 of the hot water circulation pump 100 according to the present invention, and FIG. 9 is a perspective view.

8 and 9, the inlet 11 of the upper housing 10 of the present invention is partitioned into three parts by the partition 11A. The number of the partition walls 11A is not limited to three but may be variously applied as needed. An upper shaft support portion 11B is formed at a lower portion of the partition 11A and an upper shaft insertion portion 11C is formed at an inner side of the upper shaft support portion 11B to receive and fix the rotation shaft 55 therein.

The auxiliary barrier ribs 11D are formed on one of the plurality of barrier ribs 11A. The auxiliary partition wall 11D is formed so as to protrude downwardly in an arc shape around the lower portion of the suction port 11. And an auxiliary partition wall protrusion 11E protruding inwardly and formed in the longitudinal direction at an intermediate portion of the arc shape having an arc shape. The auxiliary partition 11D has a shape in which one side of the lower and both sides, preferably the side of the discharge port 12, is opened as shown in Figs. Such a shape can prevent the occurrence of bubbles occurring on the lower side of the plurality of partition walls 11A, thereby preventing unnecessary noise due to bubbles.

It should be noted that the above description of the present invention is merely illustrative of the present invention in order to facilitate understanding of the present invention, and is not intended to define the scope of the present invention. It is intended that the scope of the invention be defined by the claims appended hereto, and that all such modifications and variations are intended to be included within the scope of the present invention.

10: upper housing 11: inlet
12: outlet 20: lower housing
30: inner housing 31: impeller receiving portion
32: lower shaft portion 40:
50: impeller 51: impeller body
52: Joint 53: Day Reorganization
54: Support plate 55:
56: Impeller upper cover 57: Impeller lower cover
58: rotor receiving portion 60: rotor
70: stator 71: core
72: upper insulator 73: lower insulator
80: circuit board 90: connector
100: Hot water circulation pump

Claims

An upper housing (10) having a fluid inlet (11) and an outlet (12);
A lower housing 20 coupled to the upper housing 10 and having a stator 70 installed therein;
An inner housing 30 installed inside the lower housing 30;
An impeller (50) positioned to form a flow path (40) which is a space defined by an inner bottom surface of the inner housing (30); And
A rotor (60) provided inside the impeller (50)
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The impeller (50) has a cavity (52) formed therein in the longitudinal direction,
A plurality of long holes 52A are formed in the side surface of the cavity 52 so that fluid gathering in the flow passage 40 is formed in the lower portion of the cavity 52. [ Flows into the cavity (52) through the hole (57B) and is discharged to the discharge port (12) through the long hole (52A).

2. The plasma display panel as claimed in claim 1, wherein a plurality of barrier ribs (11A) are formed inside the air inlet (11), and one of the plurality of barrier ribs has a lower barrier rib (11D) Hot water circulation pump.

The hot water circulation pump according to claim 2, wherein the auxiliary partition wall (11D) has a sub-partition wall protrusion (11E) protruding inwardly at an inner center thereof and formed in the longitudinal direction.

An upper housing (10) having a fluid inlet (11) and an outlet (12);
A lower housing 20 coupled to the upper housing 10 and having a stator 70 installed therein;
An impeller (50) positioned to form a flow path (40) which is a space defined by an inner bottom surface of the lower housing (20); And
A rotor 60 installed inside the impeller 50;
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The impeller (50) has a cavity (52) formed therein in the longitudinal direction,
A plurality of long holes 52A are formed in the side surface of the cavity 52 so that fluid gathering in the flow passage 40 is formed in the lower portion of the cavity 52. [ Flows into the cavity (52) through the hole (57B) and is discharged to the discharge port (12) through the long hole (52A).

An upper housing (10) having a fluid inlet (11) and an outlet (12);
A lower housing 20 coupled to the upper housing 10 and having a stator 70 installed therein;
An inner housing 30 installed inside the lower housing 30;
An impeller (50) positioned to form a flow path (40) which is a space defined by an inner bottom surface of the inner housing (30); And
A rotor (60) provided inside the impeller (50)
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Wherein the suction port (11) is partitioned by a plurality of partition walls (11A), and one of the plurality of partition walls has an auxiliary partition wall (11D) extending downward.

An upper housing (10) having a fluid inlet (11) and an outlet (12);
A lower housing 20 coupled to the upper housing 10 and having a stator 70 installed therein;
An impeller (50) positioned to form a flow path (40) which is a space defined by an inner bottom surface of the lower housing (20); And
A rotor (60) provided inside the impeller (50)
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Wherein the suction port (11) is partitioned by a plurality of partition walls (11A), and one of the plurality of partition walls has an auxiliary partition wall (11D) extending downward.