KR19980022395U - Flow improving type bi-directional hot water circulation pump - Google Patents

Abstract

The present invention relates to a flow-improving two-way hot water circulation pump that has a function to switch the flow path of the fluid is applied to the boiler system.

The present invention is a hot water circulation pump for discharging hot water to the first discharge pipe (P1) or the second discharge pipe (P2) by rotating the impeller 14 in the pump housing 31 by the drive of the rotary shaft 13 in the motor housing. In; On the outer circumferential surface of the pump casing (31) is formed a valve housing (33) communicating with the first discharge pipe (P1) and the second discharge pipe (P2) while receiving the outer end of the impeller (14); A flow path switching valve 32 having a predetermined structure is mounted to the center of the valve housing 33 so as to be able to swing by a hinge portion 32a formed at the center of the left and right symmetry.

Accordingly, the present invention by applying a pendulum-type flow path switching valve having a predetermined structure to the hot water circulation pump, while simplifying the piping system of the boiler, the flow resistance by the valve is not large, reducing the power consumption, operating noise, etc. There is an effect to improve.

Description

Flow improving type bi-directional hot water circulation pump

The present invention relates to a hot water circulation pump, and in particular, an improved flow type bidirectional hot water in which a flow path switching valve is installed in a pump housing to add a function of switching a flow path of a fluid in a hot water circulation pump applied to a heating and hot water supply system of a boiler system. It relates to a circulation pump.

1 is a block diagram showing the interior of the conventional hot water circulation pump terminated.

The hot water circulation pump 10 applied to the heating and hot water supply system of the boiler system has a structure in which the pump housing 11 and the motor housing 12 are airtightly assembled and integrated. The pump housing 11 has a vortex chamber formed therein and accommodates the impeller 14, and the motor housing 12 has a motor assembly that converts electrical force into rotational force.

The motor assembly is composed of a rotary shaft 13, a rotor 17, a stator 18, and the like, and the rotary shaft 13, into which the rotor 17 is fitted, is fitted by the upper bearing 15 and the lower bearing 16. It is supported and its upper end is connected with the impeller 14 in the pump housing 11.

When the power is supplied through the terminal of the pump housing 11, the rotor 17 and the rotation shaft 13 are subjected to the rotational force by the action of the electromagnetic force with the stator 18, so that the impeller 14 rotates to pump hot water. Some of the hot water being pumped passes through the upper bearing 15 to reach the motor assembly and cools the rotor 17 and the stator 18.

The hot water circulation pump 10 according to the above configuration has a disadvantage in that a separate flow path switching valve needs to be installed in a boiler system which requires a flow path to be switched according to the switching of the heating and hot water modes because the fluid is transferred in one direction.

That is, a conventional boiler system is composed of a hot water pipe, a heating pipe, a supplementary tank, etc., and a three-way valve (also called a 3-way valve) is connected between the hot water pipe and the heating pipe as a flow path switching means.

At this time, if the hot water circulating pump performs the function of the three-way in the boiler system, the piping is simplified and the solenoid is not required for wiring, as well as reducing the flow loss and power consumption of the fluid, as well as the man-hours due to the piping and wiring work.

In addition, it is necessary that such flow path switching means does not receive a large resistance due to the flow of the fluid.

Therefore, the present invention improves the pump housing to add a function to switch the flow path of the fluid in the hot water circulating pump applied to the heating and hot water supply system of the boiler system to simplify the piping system of the boiler while reducing flow resistance It is an object to provide a two-way hot water circulation pump.

1 is a configuration diagram terminating the inside of a conventional hot water circulation pump,

2a and 2b is a configuration diagram of a conventional hot water circulation pump improved the pump housing of FIG.

3 is a block diagram showing the inside of the pump housing of the hot water circulation pump according to the present invention,

Explanation of symbols on the main parts of the drawings

10: hot water circulation pump (conventional) 11, 21: pump housing (conventional)

12: motor housing 13: rotating shaft

14 impeller 14a suction port

15: upper bearing 16: lower bearing

17: rotor 18: stator

22: diaphragm valve 23: ball valve

30: hot water circulation pump (inventive design) 31: pump housing (inventive design)

32: flow path switching valve (invented) 32a: hinge portion

33: valve housing P1: first discharge pipe

P2: second discharge tube

In order to achieve the above object, the present invention rotates the impeller 14 in the pump housing 31 by driving the rotary shaft 13 in the motor housing to supply hot water to the first discharge pipe P1 or the second discharge pipe P2. In the hot water circulation pump to discharge; On the outer circumferential surface of the pump casing (31) is formed a valve housing (33) communicating with the first discharge pipe (P1) and the second discharge pipe (P2) while receiving the outer end of the impeller (14); Flow improving type bi-directional hot water circulation pump is installed in the center of the valve housing 33 so that the flow path switching valve 32 having a predetermined structure is oscillated by the hinge portion 32a formed at the center of the left and right symmetry. To provide.

At this time, the valve housing 33 is formed in the internal space of the rectangular surface, the flow path switching valve 32 is formed in a rectangular shape, one end of the flow path switching valve 32 is the inside of the valve housing 33 The flow path of one side of the first discharge pipe (P1) or the second discharge pipe (P2) is blocked without departing from.

EXAMPLE

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the present invention.

First, a method of providing a flow path switching means in the hot water circulation pump 10 (FIG. 1) will be described. FIGS. 2A and 2B show a configuration diagram of a conventional hot water circulation pump in which the pump housing of FIG. 1 is improved. .

FIG. 2A shows that the diaphragm valve 22 is provided between the first discharge pipe P1 and the second discharge pipe P2, and the rubber is flexible due to the action of the fluid reaction force due to the impeller 14 and the forward and reverse rotation. The diaphragm of the material changes the flow path by blocking the flow path on one side.

Such a structure is likely to cause cavitation by vortexing near the diaphragm at the outlet side of the fluid, and its outer dimensions are relatively large.

FIG. 2B shows a ball valve 23 provided between the first discharge pipe P1 and the second discharge pipe P2. The ball valve 23 is formed by the action of fluid reaction force due to the forward and reverse rotation of the impeller 14. ) Blocks the flow path on one side to change the flow path.

This structure does not have a cavitation problem like the diaphragm valve 22, but does not properly switch the flow path when foreign matter accumulated in the sphere for a long time.

Therefore, it is preferable to avoid a flexible structure such as a diaphragm or a movable structure such as a sphere.

Figure 3 is a block diagram showing the interior of the pump housing of the hot water circulation pump according to the present invention.

The present invention is a hot water circulation pump for rotating the impeller 14 in the pump housing 31 by the drive of the rotary shaft 13 in the motor housing to discharge hot water to the first discharge pipe (P1) or the second discharge pipe (P2). It applies to the structure which has the flow path switching valve 32 and the valve housing 33 as the main part.

A pendulum-type flow path switching valve 32 is proposed which excludes a flexible structure, such as the diaphragm described above, or a movable structure such as a sphere, but combines only the advantages thereof. The pendulum-type valve of the present invention can be considered to employ the rigid position of the diaphragm valve 22 (FIG. 2A) and the rigid bidy structure of the ball valve 23 (FIG. 2B).

At this time, the valve housing 33 according to the present invention is in communication with the first discharge pipe (P1) and the second discharge pipe (P2) while receiving the outer end of the impeller 14 on the outer peripheral surface of the pump housing (31) Is formed.

The valve housing 33 is formed in an integral casting structure with the pump casing 31, and has an opening in the lower portion to receive hot water spouted from the impeller 14. The opening communicates with the opening to which the first discharge pipe P1 and the second discharge pipe P2 are connected.

In addition, according to the present invention, a flow path switching valve 32 having a predetermined structure is mounted in the center of the valve housing 33 so as to be able to swing by a hinge part 32a formed at the center of the left and right symmetry.

Since the flow path switching valve 32 pendulum moves only in the valve housing 33, the flow path switching valve 32 does not interfere with the impeller 14, so that the flow path switching valve 32 may be installed on the same plane as the impeller 14. This flow path switching valve 32 is provided so as to remain horizontal by the hinge portion 32a when the fluid does not flow (ie, while the pump is stopped).

At this time, the valve housing 33 is formed in the internal space of the rectangular surface, the flow path switching valve 32 is formed in a rectangular shape, one end of the flow path switching valve 32 is the inside of the valve housing 33 The flow path of one side of the first discharge pipe P1 or the second discharge pipe P2 is blocked without departing from the above.

In order to maximize the area of the open part while the flow path switching valve 32 sends hot water in one direction to reduce the flow resistance, the inside of the valve housing 33 is preferably a rectangular structure.

When the impeller 14 rotates in one direction (for example, clockwise) in the hot water circulation pump 30 having such a configuration, the force of the impeller 14 to the hot water rotates to the right side than the left side of the flow path switching valve 32. Since the moment is formed, the flow path switching valve 32 stops at the position as shown and hot water is discharged only to the second discharge pipe P2 side.

On the other hand, when the impeller 14 rotates in the opposite direction to the above, a large rotation moment is formed to the left side of the flow path switching valve 32, so that the flow path switching valve 32 stops at a position opposite to that shown and the hot water is discharged to the first discharge pipe. It is discharged only to the (P1) side.

In this case, the hot water flow does not change sharply in any of the above cases, which is different from those of FIGS. 2A and 2B. In the related art, the flow direction of hot water passing through the valve is changed by about 90 ° or more, but the present invention is about 30 degrees. It can be said that the structure is to improve the flow resistance of hot water because it is converted to less than °.

In addition, since the flow path switching valve 32 opens and closes relatively gently due to the difference in the rotation moments of the left and right portions centering on the hinge portion 32a, a pressure hammer, which is pointed out in the conventional method, can be eliminated. It can reduce the life span of the valve and reduce the operation noise.

As described above, the flow-improving bidirectional hot water circulation pump of the present invention has a function of switching a flow path by applying a pendulum-type flow path switching valve having a predetermined structure to a hot water circulation pump applied to a heating and hot water supply system of a boiler system. It is added to simplify the piping system of the boiler while the flow resistance by the valve is not large, there is an effect of improving the pump performance, such as reducing power consumption, operating noise.

Although the present invention has been shown and described in connection with certain preferred embodiments, the present invention may be variously modified and changed without departing from the spirit or the field of the present invention provided by the following utility model registration claims. It can be readily appreciated by those of ordinary skill in the art.

Claims (2)

In the hot water circulation pump for discharging the hot water to the first discharge pipe (P1) or the second discharge pipe (P2) by rotating the impeller 14 in the pump housing 31 by the drive of the rotary shaft 13 in the motor housing; On the outer circumferential surface of the pump housing (31) is formed a valve housing (33) in communication with the first discharge pipe (P1) and the second discharge pipe (P2) while receiving the outer end of the impeller (14); Flow improvement type, characterized in that the flow path switching valve 32 having a predetermined structure in the center of the valve housing 33 is mounted so as to be able to swing movement by the hinge portion (32a) formed in the center of the left and right symmetry Two-way hot water circulation pump. According to claim 1, wherein the valve housing 33 is formed in the inner space of the rectangular surface, the flow path switching valve 32 is formed in a rectangular shape, the flow path switching valve 32 is one end of the valve housing A flow-improving two-way hot water circulation pump, characterized in that the flow path on one side of the first discharge pipe (P1) or the second discharge pipe (P2) is blocked without leaving the interior (33).