KR20000055178A - Pressure boosting pump for water purifier - Google Patents

Abstract

PURPOSE: A booster pump for use of water purifier is provided to achieve a simplified structure and reduced noise and power consumption while allowing the raw water to be fed to a filter or a membrane by a differential pressure. CONSTITUTION: A booster pump comprises a housing(1) having at both upper portions thereof a first raw water inlet pipe(111) and a first raw water outlet pipe(112) and at both lower portions thereof a second raw water inlet pipe(131) and a second raw water outlet pipe(132), an upper diaphragm (31) arranged between a retainer(21) mounted to be slidably to the housing and a sleeve(22) coupled to the retainer(21), the diaphragm(31) having an edge portion fixed to an inner wall of the housing so as to divide the upper portion of the housing into low pressure chamber(16), a valve control unit(27) installed in the low pressure chamber(16) and which controls opening/closing operation of the first raw water inlet pipe and the first raw water outlet pipe in accordance with the vertical movement of the retainer, a lower diaphragm(32) arranged between the sleeve and a lower supporting plate(23) coupled to the lower portion of the sleeve, the lower diaphragm(32) having an edge portion thereof fixed to the inner wall of the housing so as to thereby divide the lower portion of the housing into a high pressure chamber(17), and a bypass pipe(121) for connecting the first raw water outlet pipe with the second raw water outlet pipe.

Description

Pressure booster pump for water purifier {PRESSURE BOOSTING PUMP FOR WATER PURIFIER}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a booster pump for water purifiers, and more particularly to a booster pump for water purifiers, which is simple in structure, can stably supply low pressure to the membrane, and can effectively reduce noise.

The water purifier is a device made to purify raw water by filters or membranes and store the water in the storage tank, and to drink the water stored in the storage tank by drinking water.

Such water purifiers can be broadly divided into activated carbon adsorption, filtration, ultra-filter (UF), nano-filter (NF), reverse osmosis (RO), and the like according to water purification performance and characteristics. The membrane water purification device removes contaminants through the micropores of the membrane. The contaminant is filtered by pressing one side with a certain water pressure and pushing water to the other side of the membrane.

Recently, a reverse osmosis water purifier that maximizes water purification capacity is used among water purifiers using membranes. In this case, an effective water purification may not be achieved because the filtration resistance of the filter medium performing the water purification operation is large. In case of the reverse osmosis water purifier, the reverse osmosis pressure must be generated, so that the filtration resistance becomes larger. Therefore, in such a water purifier, the pressure for supplying the raw water must be high enough to supply the purified water of a sufficient flow rate desired by the user.

However, since most of the water pressure is 5 to 15 pis (0.35 to 1.06 kg / cm 2), the pressure is too low for the water purifier to normally operate. Therefore, the pressure of the raw water supplied to the water purification device must be high enough for effective water purification, and for this purpose, booster pumps are commonly used in water purifiers.

Next, an example of a general water purifier using such a booster and a membrane will be described.

As shown in Fig. 4, the water purifier includes: a precipitation filter 61 for filtering raw water supplied; An automatic raw water shutoff valve 62 installed after the settling filter to automatically cut off the supply of raw water when water is not purified; A boosting pump 63 for pressurizing and discharging water supplied from the automatic water shutoff valve; A pretreatment carbon filter 64 for adsorbing residual chlorine or toxic substances contained in the water supplied from the boost pump; A membrane filter 65 for purifying fine particles and microorganisms contained in water supplied from the pretreated carbon filter; A post-process carbon filter 66 for removing gaseous substances contained in water supplied from the membrane filter; An ultraviolet sterilizer 67 which sterilizes the water supplied from the after-treatment carbon filter and finally produces drinking water; And, it comprises a storage tank 68 for storing drinking water supplied from the ultraviolet sterilizer. Reference numeral 69 is a water level control device installed in the storage tank to automatically adjust the water level of the storage tank, reference numeral 70 is a drain line, reference numeral 72 denotes a removal water line, reference numeral 71 to the removal water line. Shows the auto flushing valve installed.

The purified water by the membrane embedded in the membrane filter 65 installed in the water purifier as described above, when the water is taken out from the storage tank 68, the automatic feed water shutoff valve 62 is opened, so that the raw water is settled by the amount of water collected. ), The automatic feed shutoff valve 62, the boosting pump 63, and the pretreatment carbon filter 64 are sequentially supplied into the membrane filter 65. At this time, a flow path of approximately 0.7 millimeters in diameter, in which the flow rate of the raw water is hard to be sufficiently discharged, is formed so that the pressure acts on the entire membrane filter 65 container, and the pressure passes through the membrane to purify the raw water.

In the water purifier as described above, there are various types of pumps used as boost pumps, but generally small pumps are used. These small pumps mainly have a rotor such as a motor and cam the rotational motion of the motor. Using a rotary pump to switch to a linear motion to pressurize the fluid in a predetermined direction in the desired direction, or a reciprocating pump (solenoid pump) to pressurize the fluid by linear reciprocating motion using an electromagnet and a magnetic material.

Rotating pumps are widely used because of their larger volume and higher pressure than reciprocating pumps, and because of their low operating noise due to the stable reciprocating motion of the reciprocating retainers. When the rotary pump is formed of a structure that can operate at a pressure even at a high pressure, the raw water is supplied at a pressure higher than the hydrostatic pressure of the membrane, which may cause fatal damage to the membrane. On the other hand, in the case of the reciprocating pump, despite the advantages that the device can be miniaturized, the structure is simple, and the cost is low, the movement of the retainer reciprocating, that is, the movement range is inaccurate and the side of the pump is generated. There is a problem that this is large.

The present invention has been made in view of the above-described conventional problems, and an object thereof is to provide a booster pump for water purifier that is simple in structure and capable of stably supplying raw water to an appropriate pressure to the membrane only by a pressure difference without a separate power source.

1 is a cross-sectional view showing a booster pump for a water purifier according to the present invention, which is a view showing a neutral state in which it does not operate.

Figure 2 is a cross-sectional view showing the operating state of the booster pump for water purifier according to the present invention, a cross-sectional view showing a state in which the raw water is supplied into the high-pressure chamber while the fluid in the low-pressure chamber is discharged.

3 is a cross-sectional view showing another operating state of the booster pump for water purifier according to the present invention, in which water is introduced into the low pressure chamber to generate pressure, and the pressure in the high pressure chamber is released.

4 is a diagram illustrating a general configuration of a water purifier.

<Description of the code | symbol about the principal part of drawing>

1: housing, 11: upper housing,

12: center housing, 13: lower housing,

16: low pressure chamber, 17 high pressure chamber,

21: retainer, 22: sleeve,

23: lower support plate, 25: spring,

27: valve opening and closing operation portion, 31, 32: diaphragm,

111: first raw water inlet pipe, 112: first raw water discharge pipe,

116, 117, 136, 137: check valve, 131: second raw water inlet pipe,

132: second source water discharge pipe, 211: plunger portion,

271: guide protrusion

In order to achieve the above object, the booster pump for water purifier according to the present invention, the space is formed inside, the first source water inlet pipe and the first source water discharge pipe each having a built-in check valve is installed on both sides, the check valve is A housing provided with built-in second source water inlet pipe and second source water discharge pipe on both lower sides thereof; An upper diaphragm which is sandwiched between a retainer installed in an inner space of the housing and a sleeve coupled to a lower portion of the retainer, and an edge portion is fixed to an inner wall surface of the housing to define a lower pressure chamber at an upper portion thereof; A valve opening / closing operation unit coupled to an upper surface of the retainer in the low pressure chamber to control the opening and closing operations of the check valves installed in the first raw water inlet pipe and the first raw water discharge pipe according to the raising and lowering of the retainer; A lower diaphragm which is sandwiched between the sleeve and a lower support plate coupled to the lower portion of the sleeve, and which defines a lower portion of the high pressure chamber by fixing an edge portion to an inner wall surface of the housing; And, it characterized in that it comprises a bypass pipe for connecting the first raw water inlet pipe and the second raw water discharge pipe.

According to the boosting pump according to the present invention configured as described above, the suction force is generated by elastically moving the sleeve upwards by the elastic force of the first spring, and the low pressure by the check valve installed in the first raw water supply pipe in accordance with the upward movement of the sleeve. Since the flow path to the chamber is blocked and the flow path to the high pressure chamber is opened by the check valve installed in the second source water supply pipe, the raw water supplied is introduced into the high pressure chamber through the second source water supply pipe through the first source water supply pipe and the bypass pipe. In this process, the flow path of the first raw water discharge pipe is opened by the check valve installed therein, and the flow path of the second raw water discharge pipe is blocked by the check valve installed therein. Therefore, the water present in the low pressure chamber is discharged through the first raw water discharge pipe as the retainer moves up.

Meanwhile, as the retainer, the sleeve, and the lower support plate move upward, the elastic force is accumulated in the upper and lower diaphragms, and the water inside the low pressure chamber is completely discharged, and then the retainer, the sleeve, and the lower support plate are lowered again by the restoring force of the diaphragm. As a result, the first raw water inlet pipe is closed while the first raw water inlet pipe is opened so that the raw water is supplied to the low pressure chamber through the first raw water inlet pipe, and the retainer, the sleeve, and the lower support plate are lowered by the supply pressure of the raw water. As a result, the second raw water inflow pipe is closed while the second raw water discharge pipe is opened so that the water in the high pressure chamber is discharged through the second raw water discharge pipe and pressurized to the purified water filter or the membrane. That is, the water discharged from the high pressure chamber through the second source water discharge pipe is formed and discharged at a higher pressure than the pressure of the constant source water flowing through the first source water inlet pipe, resulting in a boost pump.

Other features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings.

As shown in FIG. 1, reference numeral 1 is a housing, and the upper housing 11, the central housing 12, and the lower housing 13 are sequentially coupled by fastening means to form a space therein.

The first suction port 113 and the first discharge port 114 are formed on both upper surfaces of the upper housing 11, and the first raw water inlet pipe 111 is formed in the first suction port 113. The first discharge port 112 is in turn coupled to the first discharge port 114. Then, the check valve 116 is installed to be liftable through the first suction port 113 from the inside of the first raw water inlet pipe 111 so that the first raw water inlet pipe 111 can be opened and closed. The check valve 117 is installed to be elevated by passing through the first discharge port 114 from the inside of the first raw water discharge pipe 112 so that the first raw water discharge pipe 112 is opened and closed by opening and closing the first discharge port 114. It is. The opening and closing operations of the check valve 116 and the check valve 117 are reversed as shown in FIGS. 2 and 3.

A second suction port 133 and a second discharge port 134 are formed on both bottom surfaces of the lower housing 13, and a second raw water inlet pipe 131 is formed at the second suction port 133. The second source water discharge pipe 132 is sequentially coupled to the second discharge port 134. In addition, the check valve 136 is installed in the second raw water inlet pipe 131 so that the second raw water inlet pipe 131 can be opened and closed, and the inside of the second raw water discharge pipe 132 is checked. The valve 137 is provided to be movable up and down so that the second discharge port 134 is opened and closed so that the second raw water discharge pipe 132 is opened and closed. 2 and 3, the opening and closing operations of the check valve 136 and the check valve 137 are reversed, and the opening and closing operations of the check valve 116 and the check valve 136 are reversed as well. The opening and closing operations of the check valve 117 and the check valve 137 are also reversed.

Further, according to the present invention, the first raw water inlet pipe 111 is branched and one end of the bypass pipe 121 is connected, and the other end of the bypass pipe 121 is connected to the second raw water inlet pipe 131. do.

On the other hand, reference numeral 21 is a retainer which is installed to be elevated in the inner space of the housing 1, the sleeve 22 is coupled to the lower portion of the retainer 21 by a fastening means, the sleeve 22 The lower support plate 23 is coupled to the lower portion by the fastening means. Thus, the retainer 21, the sleeve 22 and the lower support plate 23 can be moved up and down together.

Further, according to the present invention, the spring 25 is coupled to the circumference of the sleeve 22, the lower end of the spring 25 is supported on the inner wall surface of the central housing 12 and the upper end of the spring 25 By being supported by the bottom surface of the upper edge part of 22, the sleeve 22 is made to receive an elastic force upwards.

The upper diaphragm 31 is sandwiched between the retainer 21 and the sleeve 22 by the fastening thereof, and the edge portion of the upper diaphragm 31 is coupled to the upper housing 11 and the center housing 12. It is pinched and fixed to the inner wall surface of the housing 1 by this. Therefore, the upper space of the upper diaphragm 31 acts as the low pressure chamber 16.

The lower diaphragm 32 is sandwiched between the sleeve 22 and the lower support plate 23 by the fastening thereof, and the edges of the lower diaphragm 32 have a central housing 12 and a lower housing 13. ) Is held and fixed to the inner wall surface of the housing (1) by the combination of. Therefore, the lower space of the lower diaphragm 32 acts as the high pressure chamber 17.

According to the present invention, low pressure is applied to the low pressure chamber 16, and high pressure is applied to the high pressure chamber 17, respectively, so that the cross-sectional area of the low pressure chamber 16 is larger than that of the high pressure chamber 17. Preferably, the cross-sectional area of the upper diaphragm 31 is thus larger than the area of the lower diaphragm 32.

On the other hand, reference numeral 27 denotes a valve opening and closing operation unit provided in the low pressure chamber 16, and controls the opening and closing of the check valves 116 and 117 as the retainer 21 moves up and down, and the center portion is hinged so that both sides can swing up and down. It is preferable to make. Both upper surfaces of the valve opening and closing operation part 27 are in contact with the lower ends of the check valves 116 and 117, respectively, and a pair of guide protrusions 271 and 271 are formed at the center of the bottom surface of the valve opening and closing operation part 27. The plunger portion 211 inserted between the guide protrusions 271 and 271 is formed at the center of the upper surface of the retainer 21 in correspondence with the guide protrusions 271 and 271 of the valve opening and closing operation portion 27. The inner circumferential surfaces of the guide protrusions 271 and 271 are tapered down. Therefore, when the retainer 21 rises along the tapered surfaces of the guide protrusions 271 and 271, the guide protrusions 271 and 271 open to both sides, and both ends of the valve opening / closing operation portion 27 are raised up around the hinge coupler. The lower ends of the check valves 116 and 117 are pushed upward to close the first raw water inlet pipe 111 while the first discharge port 114 may be opened. In contrast, when the retainer 21 descends, the valve is opened and closed. By turning both ends of the operation unit 27 back down about the hinge coupling unit, the first raw water inlet pipe 111 may be opened while the first discharge port 114 may be closed.

Next, the operation of the booster pump for water purifier according to the present invention configured as described above will be described.

For convenience, the reference numerals of the water purifiers shown in FIG. 4 are used as they are. When the user withdraws water from the storage tank 68, the automatic water shutoff valve 62 is opened and the raw water is settled by the settled water filter 61, the automatic water shutoff valve 62, and the boosting pump 63 according to the present invention. The water is purified by passing through the pretreatment carbon filter 64, the membrane filter 65, and the aftertreatment carbon filter 66, and the water purified by the UV sterilizer 67 is finally sterilized to the storage tank 68. Stored.

Thus, in the booster pump for water purifier according to the present invention in the process of raw water is supplied and purified and stored in the storage tank 68, when the water is taken out of the storage tank 68, as shown in Figure 2, the spring 25 The suction force is generated by the sleeve 22 elastically moved upward by the elastic force of the. In addition, when the sleeve 22 moves up, the retainer 21 also rises, and the check valves 116 and 117 are opened and closed by both ends of the valve opening / closing operation unit 27 as the retainer 21 rises. That is, the raw water supply flow path to the low pressure chamber 16 is blocked by the check valve 116 installed in the first raw water inlet pipe 111 and the high pressure by the check valve 136 installed in the second raw water inlet pipe 131. The raw water supply flow path to the chamber 17 is opened. Therefore, the supplied raw water may be introduced into the high pressure chamber 17 through the second raw water inflow pipe 131 through the first raw water inflow pipe 111 and the bypass pipe 121.

As such, the flow path of the first raw water discharge pipe 112 is opened by the check valve 117 installed therein, and the flow path of the second raw water discharge pipe 132 is inside the high pressure chamber 17. It is blocked by the installed check valve 137. Therefore, the raw water present in the low pressure chamber 16 is discharged through the first raw water discharge pipe 112 in accordance with the ascending movement of the retainer 21. As such, the water discharged through the first raw water discharge pipe 112 is preferably discharged at a low pressure rather than a pressure required for water purification, or may be drained as it is or used as a water supply.

Meanwhile, as the retainer 21, the sleeve 22, and the lower support plate 23 move upward, elastic force is accumulated in the upper diaphragm 31 and the lower diaphragm 32, and raw water in the low pressure chamber 16 is completely discharged. After that, the retainer 21, the sleeve 22, and the lower support plate 23 are lowered again by the restoring force of the upper diaphragm 31 and the lower diaphragm 32. Accordingly, both ends of the valve opening / closing operation part 27 are also lowered down about the hinge coupling part so that the first raw water inflow pipe 112 is closed while the first raw water inflow pipe 111 is opened so that the raw water is the first raw water oil. 3 is supplied to the low pressure chamber 16 through the inlet pipe 111, and the retainer 21, the sleeve 22, and the lower support plate 23 are further lowered by the supply pressure of the raw water, as shown in FIG. The second raw water inlet pipe 131 is closed while the second raw water discharge pipe 132 is opened so that the raw water in the high pressure chamber 17 is drained through the second raw water discharge pipe 132. As such, the water discharged from the high pressure chamber 17 through the second source water discharge pipe 132 is formed and discharged at a high pressure higher than the pressure of the constant source water flowing through the first source water inlet pipe 111 to be discharged toward the water filter or membrane. It is pressurized and it can supply water stably at the pressure required for water purification.

Then, whenever the user withdraws water from the storage tank, the above-described operation is repeated, so that the raw water may be pressurized and supplied to the purified water filter or the membrane.

As described above, according to the booster pump for water purifier according to the present invention, the interior of the housing 1 is divided into a low pressure chamber 16 and a high pressure chamber 17 using two diaphragms 31 and 32 to separate power. By supplying the raw water to the filter or membrane by the pressure difference without being able to supply the raw water at a pressure suitable for the water purification process, as well as to reduce the power consumption cost of the water purifier.

In addition, noise is not generated by supply of raw water due to the pressure difference.

In addition, since the structure can be made simple, it can be miniaturized and the raw water can be supplied at a low pressure to protect the membrane.

Claims (3)

A space is formed therein, and a first source water inlet pipe and a first source water discharge pipe each having a built-in check valve are installed at both upper sides, and a second source water inlet pipe and a second source water discharge pipe each having a check valve built in the lower both sides. An installed housing; An upper diaphragm which is sandwiched between a retainer installed in an inner space of the housing and a sleeve coupled to a lower portion of the retainer, and an edge portion is fixed to an inner wall surface of the housing to define a lower pressure chamber at an upper portion thereof; A valve opening / closing operation unit coupled to an upper surface of the retainer in the low pressure chamber to control the opening and closing operations of the check valves installed in the first raw water inlet pipe and the first raw water discharge pipe according to the raising and lowering of the retainer; A lower diaphragm which is sandwiched between the sleeve and a lower support plate coupled to the lower portion of the sleeve, and which defines a lower portion of the high pressure chamber by fixing an edge portion to an inner wall surface of the housing; And, A booster pump for water purifier, characterized in that it comprises a bypass pipe connecting the first raw water inlet pipe and the second raw water discharge pipe. The booster pump according to claim 1, wherein a cross-sectional area of the low pressure chamber is larger than a cross-sectional area of the high pressure chamber, and correspondingly, a cross-sectional area of the upper diaphragm is larger than a single area of the lower diaphragm. According to claim 1 or 2, wherein the valve opening and closing portion, the center portion is hinged to both ends are made to be able to swing up and down about the hinge coupling portion, the upper surface of both sides of the valve opening and closing operation portion of the first raw water inlet pipe and the first In contact with the lower end of the check valve built in the raw water discharge pipe, a pair of guide projections are formed in the center of the bottom of the valve opening and closing operation portion, and correspondingly the plunger portion is inserted between the pair of guide projections in the center of the upper surface of the retainer Stepped up, the booster pump for water purifier, characterized in that the inner peripheral surface of the guide projection is tapered upward.