KR101282015B1 - Diaphragm-type drain-pump - Google Patents

Abstract

PURPOSE: A diaphragm type drain pump is provided to prevent a reverse flow of the water discharged via a water outlet of a water inlet-outlet cover as a check valve for preventing a reverse flow is installed inside the water outlet. CONSTITUTION: A diaphragm type drain pump includes a water outlet cap (900), a check valve (800), and a spring (S). An expandable unit surrounding a diameter of a water outlet (120) of a water inlet-outlet cover is formed under the water outlet cap and joined to the water outlet to be detachable. A shrinkable unit which is shrank to be stepped from the expandable unit is formed above the water outlet cap. The check valve is inserted inside the water outlet of the water inlet-outlet cover and slid vertically. The lower part of the check valve opens/closes an outlet connection hole (720) of a water port. An end of the spring is supported by the upper part of the expandable unit of the water outlet cap, and the other end thereof is joined to the upper part of the check valve so that the spring elastically supports the check valve downwardly.

Description

Diaphragm type drain pump {DIAPHRAGM-TYPE DRAIN-PUMP}

The present invention relates to a diaphragm type drain pump for pumping water from an inlet to an outlet of an inlet / outlet cover, and more particularly, to a diaphragm type drain pump which pumps water from an inlet to an outlet, Out cover to the inside of the inlet / outlet cover by preventing the check valve from flowing back to the inside of the inlet / outlet cover by the check valve when the outlet cap is wrapped around the outlet cap.

Generally, diaphragm type drain pump, which pumps water while varying the internal volume of the diaphragm so that the water (fluid) flowing into the inlet is discharged to the outlet, is mainly used for bidet and electronic products.

FIG. 1 is an exploded exploded view of a conventional diaphragm type drain pump, FIG. 2 is a sectional side view of the assembled side of FIG. 1, and FIG. 3 is a view showing a configuration of a conventional diaphragm type drain pump, Sectional view.

1 and 2, the diaphragm type drain pump P according to the related art includes a housing H, an inlet / outlet cover 10, a water inlet 11, a water outlet 12, a motor 20, A rolling plate 40, a diaphragm guide 50, a diaphragm 60, and a water port 70.

A housing H having an upper portion opened and a motor 20 having an output shaft penetrating the lower portion of the housing H are coupled to the housing H. [

A slope pin 30 installed inside the housing H and spaced a predetermined distance in the radial direction from the rotation center of the output shaft of the motor 20 and rotating with respect to the output shaft of the motor in accordance with the rotation of the motor do. The motor 20 and the inclined fin 30 are coupled by a fixture 31 and the fixture 31 transmits the rotational force of the motor 20 to the inclined fin 30.

And a rolling plate 40 coupled with the inclined fin 30 to perform an up-and-down rocking motion eccentrically rotated according to the rotation of the inclined fin 30 is provided.

A diaphragm guide (50) is provided on the upper portion of the housing (H).

The diaphragm 60 is coupled with the diaphragm guide 50 to receive power from the eccentric upward and downward movement of the rolling plate 40 and to pump the water while changing its internal volume.

A water port 70 is formed at an upper portion of the diaphragm guide 50 and has a plurality of water intake holes 71 radially formed in a radial shape on a flat surface and an outflow connection hole 72 formed at a center thereof. In addition, the backflow preventing side 73 made of a flexible material is inserted from the bottom of each of the water inlet holes 71 of the water port 70. The backflow prevention side (73) is a function to prevent the backflow of water while it is possible to get water through the inlet connection hole (71).

A water inlet (11) is formed on one side of the water port (70) so as to communicate with the water inlet connection hole (71) of the water port (70) And an inlet / outlet cover 10 having an outlet port 12 formed on an upper surface thereof so as to communicate with the outlet port 72 of the diaphragm type drain pump P.

The rotational force of the motor 20 is transmitted to the inclined fin 30 provided inside the housing H. [ Then, the rolling plate 40 coupled with the inclined fin 30 performs eccentric upward and downward movement according to the rotation of the inclined fin 30. The inner volume of the diaphragm 60 is compressed or expanded by receiving the power from the eccentric upward and downward movement of the rolling plate 40 so that the water introduced from the inlet 11 of the inlet / To the water outlet (12).

3, the diaphragm type drain pump P according to the related art is operated in the OFF state after the water pumping of the drain pump P is completed and the pressure of the water casting WT, Is larger than the pressure of the water supply side water tank (WT), there is a problem that the water is flown backward.

That is, the water that has flowed out to the outlet port 12 of the inlet / outlet cover 10 flows back into the interior of the diaphragm type drain pump P between the inlet port 10 and the water port 70, There is a problem that the diaphragm type drain pump P fails or malfunctions and the normal operation can not be performed. Also, the bidet or the electronic product in which the diaphragm type drain pump P is used is also difficult to operate normally.

Therefore, the diaphragm type drain pump P of the prior art is provided with a check valve for preventing backflow between the flow path and the outflow side address of the outlet port 12, separately from the configuration of the drain pump P, (80).

In addition to the configuration of the diaphragm type drain pump P, the check valve 80 for preventing the back flow prevents the entire flow path of the drain pump P from being complicated and elongated, There is a problem that the manufacturing cost is increased together with the troubles of assembling.

In order to solve the above problems, it is an object of the present invention to provide a check valve for preventing backflow in a water outlet of a water inlet / outlet cover, so that water, which is discharged through a water outlet of a water outlet cover, And a diaphragm type drain pump in which the outlet port and the outlet cap of the inlet / outlet cover can be detachably assembled so as to facilitate insertion and assembly while supporting a check valve for preventing backflow in the outlet port of the inlet / outlet water cover.

Other objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments with reference to the accompanying drawings.

In order to accomplish the above object, a diaphragm type drain pump according to the present invention comprises: a housing having an open top; a motor having an output shaft penetrating a lower portion of the housing; An inclined pin spaced a predetermined distance in the radial direction from the rotation center and rotating with respect to the output shaft of the motor in accordance with the rotation of the motor; A diaphragm guide installed at an upper portion of the housing, a diaphragm coupled to the diaphragm guide to receive power from the eccentric upward and downward movement of the rolling plate and to perform water pumping with the inner volume changing, And a plurality of intake connection holes A water port formed at an upper portion of the water port so as to communicate with an inlet connection hole of the water port and having an inlet port protruded at one side thereof and communicating with an outlet connection hole of the water port, And an inlet / outlet cover formed on the upper surface of the inlet / outlet cover so as to protrude therefrom. The diaphragm type drain pump is detachably coupled to the outlet through a lower portion of the inlet / outlet cover, A check valve which is installed so as to be slidable upward and downward and inserted into the outlet port of the inlet / outlet cover, the lower portion of which opens and closes the outlet connection hole of the water port, Is supported on the upper end of the enlarged portion of the cap and the other end is engaged with the upper portion of the check valve, It comprises an elastic support spring downward.

The outflow cap is detachably coupled to the outflow port of the inlet / outlet cover via a protrusion formed on the outer circumferential surface of the outlet port of the inlet / outlet cover and a detachment groove formed on the inner circumferential surface of the enlarged portion of the outlet cap.

In addition, the check valve is formed with a guide groove recessed at its upper end, and the cap cap is inserted into the guide groove of the check valve so as to prevent the check valve from moving left and right, And is protruded.

Further, the present invention is characterized by further comprising an O-ring interposed between the outflow port of the I / O cover and the enlarged portion of the outflow cap for preventing water leakage.

The outlet port of the inlet / outlet cover is formed with a plurality of slit grooves along the circumference of the inner circumferential surface in the vertical direction so as to increase the flow rate of outflow.

Each of the water inlet and outlet holes of the water port is provided with a backflow preventing side provided to prevent reverse flow from the outlet to the inlet, And an enlarged groove having a diameter wider than the diameter of the prevention edge is formed in a stepped depression.

The diaphragm type drain pump according to the present invention is provided with a check valve for preventing the backflow in the outlet port of the inlet / outlet cover to prevent the water exiting through the outlet port of the inlet / outlet cover from flowing back into the inlet / outlet cover of the diaphragm type drain pump can do.

Further, since the outflow cap supporting the check valve inserted into the outflow port of the input / output cover can be detached from the outflow port, it is possible to ensure ease of assembly and ease of maintenance, and space utilization due to reduction in assembly space and volume Can be maximized, and the manufacturing cost can be reduced.

1 is an exploded exploded view of a conventional diaphragm type drain pump,
Fig. 2 is an assembled side view of Fig. 1,
Fig. 3 is an overall configuration diagram of the diaphragm type drain pump according to Fig. 1,
FIG. 4 is a perspective view explaining an embodiment of a diaphragm type drain pump according to the present invention,
FIG. 5 is a perspective view showing a coupling relationship to a recess in the embodiment of FIG. 4,
Figure 6 is an assembled perspective view of the embodiment of Figure 4,
Figure 7 is a side view of the embodiment of Figure 6,
8 is a side cross-sectional view showing an operation state in the case where the motor is not operated in the diaphragm type drain pump of the present invention,
9 is a side sectional view showing an operating state in the case where the motor is operated in the diaphragm type drain pump of the present invention,
FIG. 10 is a perspective view showing in detail the outgoing cap of the diaphragm type drain pump of the present invention,
11 is a perspective view showing a state before the water port and the backflow prevention side are joined in the diaphragm type drain pump of the present invention,
12 is a cross-sectional view showing a state in which the water port and the check valve of the embodiment of FIG. 11 are engaged,
13 is a plan sectional view of the slit groove of the outlet port in the diaphragm type drain pump of the present invention,
Fig. 14 is an enlarged view of the main part of the embodiment of Fig. 8;

Hereinafter, preferred embodiments of a diaphragm type drain pump according to the present invention will be described in detail with reference to the accompanying drawings.

4 to 14, the diaphragm type drain pump of the present invention includes an inlet / outlet cover 100, a motor 200, a housing H, an inclined fin 300, a rolling plate 400, a diaphragm guide 500, a diaphragm 600, a water port 700, a check valve 800, a spring S and an outflow cap 900. Particularly, the input / output cover 100 further includes a water inlet 110 and a water outlet 120, and the water outlet 120 further includes a projection 121 and a slit groove 122. The cap cap 900 further includes a diameter portion 910, a reduced diameter portion 920, a detachable groove 930, and a cap guide 940.

The diaphragm type drain pump according to the present invention, as shown in Figs. 4 to 9

A housing H having an upper portion opened and a motor 200 having an output shaft passed through the lower portion of the housing H are coupled to the housing H. [

An inclined fin 300 installed inside the housing H and spaced a predetermined distance in the radial direction from the rotation center of the output shaft of the motor 200 and rotating about the output shaft of the motor according to the rotation of the motor do. The motor 200 and the inclined fin 300 are coupled by a fixture 310 and the fixture 310 transmits the rotational force of the motor 200 to the inclined fin 300.

And a rolling plate 400 coupled to the inclined fin 300 and having an eccentric up-and-down motion according to the rotation of the inclined fin 300 is installed.

A diaphragm guide 500 is installed on the upper portion of the housing H. The diaphragm 600 is coupled with the diaphragm guide 500 to receive power from the eccentric upward and downward movement of the rolling plate 400 and to pump the water while changing its internal volume.

A water port 700 is installed on the upper part of the diaphragm guide 500 and has a plurality of water intake holes 710 formed in a radial shape on a flat surface and has an outflow connection hole 720 formed at the center thereof. In addition, a backflow preventing side 730 made of a flexible material is inserted from the bottom of each of the inlet connecting holes 710 of the water port 700. The backflow prevention side 730 prevents the backflow of the water through the inlet connection hole 710, but reversely.

A water inlet 110 is formed on one side of the water port 700 so as to communicate with the water inlet connection hole 710 of the water port 700, And an inlet / outlet cover (100) having an outlet port (120) protruded from the top surface to communicate with the outlet port (720) of the diaphragm type drain pump (P). In addition, although the connection from the housing H to the inlet / outlet cover 100 is shown as being screwed, other coupling methods than the screw coupling are also applicable.

The rotational force of the motor 200 is transmitted to the inclined fin 300 installed in the housing H. Then, the rolling plate 400 coupled with the inclined fin 300 performs eccentric upward and downward movement according to the rotation of the inclined fin 300. The inner volume of the diaphragm 600 is compressed or expanded by receiving the power from the eccentric upward and downward movement of the rolling plate 400 and the diaphragm 600 is deformed so that the water introduced from the inlet 110 of the inlet / To the outlet (120). The drain pump (120) is connected to the outlet (120).

Hereinafter, specific features of only the diaphragm type drain pump P according to the present invention will be described.

As shown in FIGS. 4 to 10, the head cap 900 is formed at a lower portion thereof with a large diameter portion 910 extending to cover the outer diameter of the water outlet 120 of the water outlet cover 100, And a reduced diameter portion 920 which is stepped down from the enlarged diameter portion 910 is formed on the upper portion.

4, 5, 8 and 9, the check valve 800 is inserted into the outlet port 120 of the inlet / outlet cover 100 to be slidable up and down, And opens and closes the outflow connection hole 720 of the outlet 700. Also, the check valve 800 is formed with a guide groove 810 at an upper end thereof.

4, 5, 8 and 9, one end of the spring S is supported on the upper end of the enlarged portion 910 of the head cap 900 and the other end is engaged with the upper portion of the check valve 800 Thereby elastically supporting the check valve 800 downward.

The check valve 800 and the spring S are inserted into the outlet cap 900 which is detachably coupled to the outlet port 120 of the inlet / outlet cover 100 and the outlet port 120, Are sequentially inserted. One end of the spring S is supported at the upper end of the inside of the enlarged diameter portion 910 of the cap 900 so that the other end of the spring S pushes the check valve 800 downward, And the check valve 800 opens and closes the outflow connection hole 720 of the water port 700. The check valve 800 is provided at the inlet port 120 of the water port 700,

Since the check valve 800 is installed inside the outlet 120 of the inlet / outlet cover 100, the check valve 800 functions as an opening / closing valve for opening / closing the outlet connection hole 720 of the water port 700, ) To prevent backflow of water.

That is, when the motor 200 is operated and the water introduced from the inlet 110 of the inlet / outlet cover 100 is discharged to the outlet 120 of the inlet / outlet cover 100, The spring S is compressed and the check valve 800 and the spring S are pushed upward and at the same time the flow path of the outflow port 120 is opened and the inflow water is discharged .

In contrast, when the motor 200 is not operated, the other end of the spring S, the one end of which is supported at the upper end of the enlarged portion 910 of the capping cap 900, The check valve 800 closes the water outlet connection hole 720 of the water port 700 so that the flow path is closed and the water at the water outlet side can be prevented from flowing backward.

If there is no check valve 800, if the pressure of the outgoing water tank WT is greater than the pressure of the incoming water tank WT, the water in the outgoing water tank is discharged through the outflow port 120 of the in / Flows into the interior of the diaphragm type drain pump (P) between the water ports (700) coupled with the inlet / outlet cover (100) to cause the diaphragm type drain pump (P) to malfunction or interfere with normal operation do. Therefore, in order to prevent the backward flow of water at the outgoing address side as described above, a check valve 80 for preventing reverse flow is separately provided between the diaphragm type drain pump P and the water outlet side water tank. This problem has been mentioned in the prior art.

As described above, the diaphragm type drain pump P itself is characterized in that the check valve 800 for preventing the reverse flow is provided.

The reason why the cap cap 900 is stepped on the enlarged diameter portion 910 and the reduced diameter portion 920 is that the one end of the spring S is supported by the cap cap 900, So that it can be easily connected to a pipe connected to the pipe. The enlarged diameter portion 910 and the reduced diameter portion 920 of the cap cap 900 penetrate along the longitudinal direction to form a flow path.

Particularly, the present invention is characterized by the cap cap 900 detachably coupled to the outlet port 120 of the inlet / outlet cover 100 and the outer diameter of the outlet port 120. As shown in Figs. 4 to 10, the coupling structure includes protrusions 121 formed on the outer circumferential surface of the outflow port 120 of the inlet / outlet cover 100, detachable grooves formed on the inner circumferential surface of the expanded portion 910 of the outflow cap 900, The outflow cap 900 is detachably coupled to the outflow port 120 of the I / O cover 100 through the opening 930. In addition, the shape of the detachable groove 930 can be changed according to the shape of the protrusion 121 formed in the outflow port 120, and the detachable groove 930 is formed in a shape capable of rotation locking.

Here, the detachable coupling method may be variously applied to a coupling method that can be assembled, such as a screw coupling method or a push lock coupling method, in addition to a rotation locking coupling method.

The check valve 800 for preventing the backflow is installed inside the outflow port 120 because the outflow port 120 of the inlet / outlet cover 100 and the outflow cap 900 are detachably coupled as described above. It is possible to prevent the water that has flowed out to the water inlet side water tank from flowing back into the inside / outside water cover 100 of the diaphragm type drain pump P. In addition, the convenience of assembly and the ease of maintenance can be ensured, space utilization due to reduction in assembly space and volume can be maximized, and manufacturing cost can be reduced.

4 to 10, the outflow cap 900 is inserted into the guide groove 810 formed at the upper end of the check valve 800 so that the check valve 800 can be inserted into the outlet 120 The cap guide 940 is protruded downward from the inner upper end of the enlarged diameter portion 910 so as to prevent the cap guide 940 from flowing.

As shown in FIGS. 4, 5, 8 and 9, an O-ring (OR, O-ring) is formed between a water outlet 120 of the water inlet cover 100 and a diameter portion 910 of the water outlet cap 900, . In the embodiment of the present invention, the O-ring (OR) is installed on the upper side of the outflow port 120 of the I / O cover 100, and the outflow cap 900, which is rotationally locked to surround the outer circumference of the outflow port 120 And is positioned between the inner circumferential surfaces of the enlarged diameter portions 910. In addition, the O-ring (OR) may be provided on the upper surface of the outflow port (120) to be positioned between the enlarged portions (910) of the outflow cap (900). That is, when the O-ring (OR) is interposed only between the outflow opening 120 of the inlet / outlet cover 100 and the enlarged portion 910 of the outflow cap 900 which are detachably assembled in a detachable manner, It serves as a sealing function to prevent leakage.

The slit grooves 122 are formed along the circumference of the inner circumferential surface in the vertical direction so as to increase the outflow flow rate to the outflow port 120 of the inlet / outlet cover 100 as shown in Figs. 4, 5, 8 and 9, A plurality is formed. Since the check valve 800 and the spring S are inserted into the outlet 120 and the outlet cap 900 is detachably assembled to the outlet 120, The space can be narrowed, and the flow rate of outgoing water along the flow path inside the outflow port 120 can be limited.

When the motor 200 is operated and the water flowing in from the inlet 110 of the inlet / outlet cover 100 flows out to the outlet 120 of the inlet / outlet cover 100, And the slit groove 122 is formed in order to secure a flow path not interfering with the spring S.

The counterflow preventing side 730 and the extending groove 740 are formed in the water inlet holes 710 of the water port 700 as shown in FIGS. 4, 8, 9, 11, (730) installed to prevent backflow to the inlet (110). Each of the water inlet holes 710 of the water port 700 is formed with a stepped depression so as to increase the flow rate of the water to be introduced. The enlarged groove 740 has a diameter wider than the diameter of the backflow prevention wall 730.

14, the rolling plate 400 is coupled with the inclined fin 300 to perform an up-and-down pivot movement eccentrically formed by the inclined fin 300, and the rolling plate 400 The diaphragm guide 500 is brought into contact with the upper portion of the diaphragm guide 500. The diaphragm 600 receives power from the eccentric upward and downward movement of the rolling plate 400 to support water pumping from the inlet 110 to the outlet 120 of the inlet / The diaphragm guide 500 swings along with the eccentric upward and downward movement of the rolling plate 400, so that noise due to shaking may occur.

A boss 510 protrudes from the lower center of the diaphragm guide 500 and a boss 510 of the diaphragm guide 500 is inserted into an upper center of the rolling plate 400 contacting the diaphragm guide 500 The boss groove 410 is recessed. When the boss 510 of the diaphragm guide 500 is inserted into the boss groove 410 of the rolling plate 400 and the boss 510 of the diaphragm guide 500 is engaged with the boss groove 410 of the rolling plate 400, Thereby preventing the generation of noise due to the shaking even in the up-and-down rocking motion.

The embodiments of the present invention described above and shown in the drawings should not be construed as limiting the technical idea of the present invention. The scope of protection of the present invention is limited only by the matters described in the claims, and those skilled in the art will be able to modify the technical idea of the present invention in various forms. Accordingly, such improvements and modifications will fall within the scope of the present invention as long as they are obvious to those skilled in the art.

100. I / O cover
110. Inlet 120. Outlet
121. Projection 122. Slit groove
200. Motor
300. Inclined pin 310. Fixture
400. Rolling plate 410. Boss groove
500. Diaphragm Guide 510. Boss
600. Diaphragm
700. Water Port
710. Acquired connection ball 720. Acquired connection ball
730. Backflow prevention valve 740. Extension groove
800. Check valve
810. Guide home
900. Head cap
910. Diameter portion 920. Diameter portion
930. Removal groove 940. Cap guide
P. Drain pump WT. Water Tank
S. Spring OR. O-ring
H. Housing

Claims (6)

A motor provided with an output shaft through the lower portion of the housing; a motor provided in the housing and spaced apart from the rotation center of the output shaft of the motor by a predetermined distance in the radial direction, A rolling plate coupled to the tapered pin to perform eccentric up-and-down movement in response to rotation of the tapered pin; a diaphragm guide installed at an upper portion of the housing; A diaphragm coupled to the diaphragm guide and receiving power from the eccentric upward and downward movement of the rolling plate to change a volume of the diaphragm to perform water pumping; a diaphragm installed at an upper portion of the diaphragm guide, A water port formed at a center thereof through which an outgoing connection hole is formed, And an inlet / outlet cover protruding from one side of the water port so as to communicate with the water inlet / outlet of the water port and having a water outlet protruded from the upper surface so as to communicate with the water outlet connection hole of the water port, ,
An outlet cap formed at an upper portion thereof with a diametrically reduced portion diametrically reduced from the enlarged diameter portion, a lower portion formed at an upper portion of the inlet cap,
A check valve which is inserted into the outlet port of the inlet / outlet cover and is slidable up and down, and whose lower portion opens and closes the outlet connection hole of the water port;
And a spring whose one end is supported at the upper end of the enlarged portion of the cap and the other end is engaged with the upper portion of the check valve to elastically support the check valve downwardly.
The method according to claim 1,
Wherein the outflow cap is detachably coupled to the outflow port of the inlet / outlet cover through a protrusion formed on the outer circumferential surface of the outlet port of the inlet / outlet cover and a detachment groove formed on the inner circumferential surface of the enlarged portion of the outlet cap.
The method according to claim 1,
The check valve
A guide groove is formed in the upper end thereof,
The water-
And a cap guide protruded downward from an inner upper end of the enlarged diameter portion so as to be inserted into a guide groove of the check valve to prevent the check valve from moving left and right.
The method according to claim 1,
Further comprising an O-ring interposed between the outlet port of the inlet / outlet cover and the enlarged diameter portion of the outlet cap for preventing leakage.
The method according to claim 1,
Wherein the inlet /
Wherein a plurality of slit grooves are formed along the circumference of the inner circumferential surface in the up-and-down direction to increase the outflow flow rate.
The method according to claim 1,
Each of the water inlet and outlet holes of the water port is provided with a backflow preventing side provided to prevent back flow from the inlet to the inlet,
Each of the water inlet and outlet connection holes of the water port,
Wherein an expansion groove having a diameter wider than the diameter of the backflow prevention side is formed so as to be stepped so as to increase an intake flow rate.

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