WO2005108839A1

WO2005108839A1 - Motor operated valve for cooling and heating piping

Info

Publication number: WO2005108839A1
Application number: PCT/KR2005/001223
Authority: WO
Inventors: Yong Youp Kim; Keun Sik Park; Keun Soo Sung
Original assignee: Hansung Sysco Co., Ltd.
Priority date: 2004-05-07
Filing date: 2005-04-27
Publication date: 2005-11-17
Also published as: CN1693741A; KR100455360B1

Abstract

Disclosed herein is a motor operated valve for a cooling and heating piping, in which a water temperature control unit of a water temperature control assembly provided inside a valve body is operated by the power of a driver unit having a reference projection and a connection nut to thereby control the flow rate of cooling and heating water passing from an inlet port at one side of the valve body to an outlet port at the other side thereof. The water temperature control assembly is formed of plastic material through an injection molding process. A setting groove is formed in the outer periphery of the top face thereof so as to be engaged with the reference projection of the driver unit. The water temperature control assembly includes a casing comprised of a head portion and a hollow lower portion integrally formed with each other.

Description

Description MOTOR OPERATED VALVE FOR COOLING AND HEATING PIPING Technical Field

[1] The present invention relates to a motor operated valve for a cooling and heating piping. More specifically, the invention relates to such a motor operated valve for a cooling and heating piping, in which plural separate components, which are provided inside the motor operated valve to be opened and closed by the power of a driver unit having a reference projection and controls the flow rate of the cooling and heating water depending on the rotation by the driver unit, can be integrated, and simultaneously a setting groove corresponding to the reference projection can be formed together. Background Art

[2] In general, home automation means an automation of household and lifestyle at home. The typical home automation systems include a house control system such as a remote control using a PC and a cellular phone, a home security system for crime and disaster prevention, an automatic metering system for electricity and gas, and an automatic cooking device. Also, a system for controlling energy, lighting, cooling and heating and hot water is included.

[3] Among the above energy systems, in case of the cooling and heating control and the hot water control, the room temperature or the water temperature of bath is controlled by switching a switch at a certain desired time. For this purpose, a digital temperature controller is installed in each house. In the boiler distributor, a valve, which is automatically opened and closed by a driver unit, is installed in each line. The driver unit is interconnected with a digital temperature controller through an electrical circuit and thus driven according to an operational command signal.

[4] On the other hand, the value is classified, according to its structure, into a gate valve, a globe valve, a ball valve, or the like. Among them, the ball valve has been widely used. In the typical globe valve, it carries out a linear reciprocating motion by means of a spring force to thereby perform a closing and opening. When the water pressure is high, the spring is likely to deform and thus degrade its function, thereby failing to provide a precision operation.

[5] The ball valve is operated in a rotational mode and thus solves the above problems with the globe valve. However, when the water pressure is high, the ball is pushed back to touch the Teflon, which is mounted for tight-seal. Thus, the Teflon is abraded and must be periodically replaced. [6] Accordingly, in order to solve the above problems, a ceramic valve, which has a good mechanical strength and is operated in a rotational mode, has been proposed.

[7] FIG. 4 is a perspective view of a conventional motor operated valve for cooling and heating piping.

[8] As depicted in FIG. 4, the motor operated valve 200 is combined with a driver unit 100 and installed together in a cooling and heating piping. The opening and closing operation for a cooling and heating water, which is discharged from an inlet port 211 to an outlet port 212 of the valve body 210, is carried out by the driving force of the driver unit 100. In order to prepare an initial setting standard to the driver unit 100, the driver unit 100 is provided with a reference projection 120 formed therein. In the valve cover 220 of the motor operated valve 200 is formed a setting groove 222 near the central shaft-inserting hole 221.

[9] FIG. 5 is an exploded perspective view of the conventional motor operated valve in FIG. 4.

[10] In order to control the flow rate of cooling and heating water flowing between the inlet port 211 and the outlet port 212 of the valve body 210, the motor operated valve 200 is provided with a sheet disk 230 having a through-hole 230a at both sides thereof. On the top face of the sheet disk 230 is adhered an opening and closing disk 240 having an opening and closing hole 240a formed at both sides thereof. The opening and closing disk 240 is comprised of a drive shaft 251 to be connected to the driver unit 100 and a valve shaft 252 to be connected to the opening and closing disk 240.

[11] The valve shaft 252 has a connection projection 252a at the lower side thereof, which is to be fitted into the connection depressed groove 240b formed on the top face of the opening and closing disk 240. The driving force of the driving shaft 251 is transferred to the valve shaft 252 so that the open and closing disk 240 is rotated, thereby opening and closing the flow rate for cooling and heating water in-flown to the inside of the valve body 210.

[12] Here, unexplained reference number 260 denotes a sealing disk and 270 denotes a packing.

[13] FIG. 6 is a sectional view of the assembled conventional motor operated valve in FIG. 4.

[14] As shown in FIG. 6, in the conventional motor operated valve, the opening and closing disk 240 is adhered to the upper portion of the sheet disk 230 inside the chamber 212 of the valve body 210. On top of the opening and closing disk 240 is assembled a sealing disk 260 and a valve shaft 252. Thereafter, the valve cover 220 is screw-connected to the valve body 210 to thereby perform an assembling, and the driver shaft 251 is inserted inside the valve cover 220 and connected to the valve shaft 252. Then, a connection nut 110 is connected to the valve cover 220, thereby combining the driver unit 100.

[15] On the other hand, in the aforementioned motor operated valve, most importantly, the inlet port 211 thereof must be perpendicular to the outlet port 212, and in the installed state, the setting groove 222 formed in the valve cover 220 must be precisely aligned with the reference projection 120 formed in the driver unit 100.

[16] However, when the valve cover 220 is assembled into the valve body 210, it is very difficult to align precisely the setting groove 222 with the reference projection 120 of the driver unit 100 because the setting groove 222 is formed beforehand in the valve cover.

[17] Accordingly, commonly, the setting groove 222 is not formed beforehand in the valve cover, which is assembled into the valve body 210. Thereafter, the position of the setting groove 222 is predetermined in the valve cover 220, and at the assembled state with the valve body 210, the setting groove 222 is separately formed.

[18] In the above groove forming process, usually, the valve body 210 is fixed using a jig and then the setting groove 22 is formed in the valve cover 220. Even though the valve body is fixed by the jig, the valve body 210 is moved by a pressure during the groove forming process, thereby failing to form an accurate groove.

[19] After the above separate groove forming is completed, the valve body 210 is installed. At this time, the connection area, i.e., the inlet port 211 and the outlet port 212 of the valve body 210 and a distribution pipe is applied with a sealing work in order to prevent leakage through the connection areas. Thus, it is not easy to detach again after installation.

[20] Therefore, in case where defect occurs after installation, the valve body 210 cannot be detached from the distribution pipe. Thus, at the connected state, the valve cover 220 only is removed from the valve body 210 and internal components are replaced, thereby leading to a difficult repairing and replacing process.

[21] That is, the workman must remove each small part from the cramped internal space of the valve body 210 and re-assembled, thereby resulting in a difficult job and an extended repair time. In addition, when the valve cover 220 is re-assembled to the valve body 210 after replacement of parts, it is very difficult to align the setting groove 222 formed in the valve cover 220 with the reference projection 120 of the driver unit 100.

[22] Therefore, the above repairing process is rarely carried out. In stead, the entire valve body 210 including the valve cover 220 is removed from the distribution pipe and replaced with a new one in the same manner as in the new installation. Similarly, it is not easy in a limited space to detach the valve body 210 for the distribution pipe and re-attach thereto. Disclosure of Invention Technical Problem

[24] Therefore, the present invention has been made in view of the above problems occurring in the prior art, and it is an object of the present invention to provide a motor operated valve for a cooling and heating piping, in which plural separate components, which are provided inside the motor operated valve to be opened and closed by the power of a driver unit having a reference projection and controls the flow rate of the cooling and heating water depending on the rotation by the driver unit, can be integrated, and simultaneously a setting groove corresponding to the reference projection can be formed together.

[25] Another object of the invention is to provide a motor operated valve for a cooling and heating piping, in which the water temperature control assembly can be detachably attached to the valve body and a sealing interposed between the above integrated water temperature control assembly and the valve body can be pressurized to thereby provide a tight sealing when assembling.

[26] A further object of the invention is to provide a motor operated valve for a cooling and heating piping, in which each component constituting the water temperature assembly is combined so as to be separated from each other and, at the same time, a tight sealing can be provided to a valve shaft, which rotates a water temperature control unit inside the water temperature control assembly, by means of the power of the driver unit.

[27] Technical Solution

[28] To accomplish the above object, according to one aspect of the present invention, there is provided a motor operated valve for a cooling and heating piping, in which a water temperature control unit of a water temperature control assembly provided inside a valve body is operated by the power of a driver unit having a reference projection and a connection nut to thereby control the flow rate of cooling and heating water passing from an inlet port at one side of the valve body to an outlet port at the other side thereof. The water temperature control assembly is formed of plastic material through an injection molding process. A setting groove is formed in the outer periphery of the top face thereof so as to be engaged with the reference projection of the driver unit. The water temperature control assembly includes a casing comprised of a head portion and a hollow lower portion integrally formed with each other. The head portion has a thread portion formed in the outer circumference thereof so as to be combined with the connection nut of the driver unit. The hollow lower portion has a feed hole formed at the lower side thereof and a discharge hole formed at the lateral side thereof. Thus, the water temperature control assembly is allowed to be freely inserted into a chamber of the valve body. The casing is structured such that the head portion has a diameter larger than that of the lower portion and a latching step is formed in the lower portion. A thread portion is formed in the outer side of the chamber of the valve body and a fixing nut is fastened to the thread portion to thereby pressurize the upper portion of the latching step of the head portion, thereby fixing the casing to the valve body. Advantageous Effects

[29] As described above, according to the present invention, plural separate components, which are provided inside the motor operated valve to be opened and closed by the power of a driver unit having a reference projection and controls the flow rate of the cooling and heating water depending on the rotation by the driver unit, can be integrated. Simultaneously, a setting groove corresponding to the reference projection can be formed together. Thus, when the motor operated valve is installed in a cooling or heating piping, the initial setting of the motor operated valve against the reference projection of the driver unit can be simply and precisely performed. With the motor operated valve installed in the cooling or heating piping, internal component parts can be replaced simply, thereby providing a simplified and efficient repairing and replacement, as compared with the conventional technique where the entire motor operated valve must be removed from the cooling or heating piping.

[30] In addition, in order to provide a tight sealing when assembling, a sealing interposed between the above integrated water temperature control assembly and the valve body can be pressurized to thereby provide more reliable sealing.

[31] Furthermore, each component constituting the water temperature assembly is combined so as to be separated from each other. At the same time, a tight sealing can be provided to a valve shaft, which rotates a water temperature control unit inside the water temperature control assembly, by means of the power of the driver unit. Thus, components, which are to be periodically replaced, can be simply replaced, and also a reliable sealing can be achieved.

[32] The casing constituting the water temperature control assembly is formed of plastic material through an injection molding process, thereby simplifying the manufacturing process and reducing the manufacturing cost therefor.

[33] Brief Description of the Drawings

[34] Further objects and advantages of the invention can be more fully understood from the following detailed description taken in conjunction with the accompanying drawings in which:

[35] FIG. 1 is a perspective view of a motor operated valve for cooling and heating piping according to the present invention; [36] FIG. 2 is an exploded perspective view of the motor operated valve in FIG. 1;

[37] FIG. 3 is a sectional view of the assembled motor operated value in FIG. 1;

[38] FIG. 4 is a perspective view of a conventional motor operated valve for cooling and heating piping; [39] FIG. 5 is an exploded perspective view of the conventional motor operated valve in FIG. 4; and [40] FIG. 6 is a sectional view of the assembled conventional motor operated valve in FIG. 4. [41] Best Mode for Carrying Out the Invention [42] The preferred embodiments of the invention will be hereafter described in detail with reference to the accompanying drawings. [43] FIG. 1 is a perspective view of a motor operated valve for cooling and heating piping according to the present invention. [44] In general, a motor operated valve is combined with a driver unit 100 and installed together in a cooling and heating piping. An opening and closing operation for a cooling and heating water, which is discharged from an inlet port 211 to an outlet port 212 of a valve body 210, is carried out by the driving force of a driver unit 100.

[45] In the motor operated valve for cooling and heating piping, according to the present invention, plural parts, which are provided inside the motor operated valve and controls the flow rate of the cooling and heating water depending on the rotation by the driver unit, are integrated into a water temperature control assembly 1. The water temperature assembly 1 includes a setting groove 222, which corresponds to the reference projection 120 of the driver unit 100. Here, unexplained reference numeral 250 denotes a driver shaft of the driver unit.

[46] FIG. 2 is an exploded perspective view of the motor operated valve in FIG. 1.

[47] The water temperature control assembly 1 is installed perpendicularly in a chamber 213 having an open top, which is formed between an inlet port 211 and an outlet port 212 of the valve body 210. A water temperature control unit 3 is provided inside a casing 2 formed through an injection molding process. The water temperature control unit 3 is constructed so as to be supported by a fixing packing 4, which is combined below the casing 2, without releasing through the lower side of the casing 2.

[48] The casing 2 is comprised of a head portion 21 at the upper side and a hollow lower portion 22, which are integrally formed. At the outer circumference of the head portion 21 is formed a thread portion 21b, to which a connection nut 110 of the driver unit 100 is thread-connected. At the center of the top face thereof is formed a shaft hole 21c vertically passing through. At both sides outwards of the shaft hole 21c is formed a setting groove 21a, which is corresponding to the reference projection 120 of the driver unit 100 (refer to FIG. 1).

[49] In addition, the lower portion 22 is provided with a feed hole 22a at its lower side and a discharge hole 22b at its lateral side. The cooling and heating water in-flown through the inlet port 211 of the valve body 210 is fed through the feed hole 22a. The cooling and heating water fed inside through the feed hole 22a is adjusted in its flow rate by means of the water temperature control unit 3 and then discharged through the discharge hole 22b towards the outlet port 212 of the valve body 210.

[50] In order to provide a sealing between the casing 2 and the valve body 210, the head portion 21 has a diameter larger than that of the lower portion 22 to thereby form a latching step 23 at its lower side, and at the inner upper side of the chamber 213 of the valve body 210 is formed a resting step 24, correspondingly to the latching step 23. A sealing 25 is inserted outside the lower portion 22 between the latching step 23 and the resting step 24.

[51] Furthermore, at the outer upper side of the chamber 213 is formed a thread portion 6, to which a fixing nut 5 is engaged to thereby pressurize the latching step 23 of the head portion 21 from above. Thus, the tightening of the fixing nut 5 presses the sealing 25 to provide a tight-sealing between the casing 2 and the valve body 210.

[52] The water-temperature control unit 3 is provided inside the lower portion 22 of the casing 2, and controls the flow rate of cooling and heating water passing through the feed hole 22a and the discharge hole 22b, by means of the rotation quantity transferred from the driver unit 100. A opening and closing disk 32 having an opening and closing hole 32a at both sides thereof is adhered to the top face of a sheet disk 31 having a through-hole 31a at both sides thereof. The sheet disk 31 and the opening and closing disk 32 are formed of a ceramic material and have same diameters.

[53] In addition, to the upper side of the opening and closing disk 32 is coupled a valve shaft 33. The valve shaft 33 passes through the shaft hole 21c of the casing 2 and is coupled to the driver shaft 251 of the driver unit 100, such that the driving power of the driver unit 100 is transferred to the valve shaft 33, which thereby rotates the opening and closing disk 32.

[54] For this purpose, in the lower end portion of the valve shaft 33 is formed a flange 33a having a diameter corresponding to that of the opening and closing disk 32. In the center of the bottom face of the flange 33a is formed a connection projection 33b, which is inserted into a connection depressed groove 32b and combined therewith. Thus, the opening disk 32 is operatively interlocked with the valve shaft 33.

[55] In addition, for the purpose of sealing, a sealing ring 33c is provided in the upper and lower face of the flange 33a, and two or more sealing packing 33d are interposed approximately at the intermediate portion of the valve shaft 33.

[56] On the other hand, a fixing projection 7 formed in the casing 2, the sheet disk 31 and the fixing packing 4 is engaged with a fixing groove 8 in the lower inner side of the casing 2 and the valve body 210, thereby preventing the casing 2 and elements thereinside from being rotated. Alternatively, considering that the setting groove 222 formed in the casing 2 is fitted into the reference projection 120 of the driver unit 100 while rotating the casing 2, the fixing projection 7 and the fixing groove 8 are preferred to be formed in plural at regular intervals, rather than limiting them to a specific position.

[57] FIG. 3 is a sectional view of the assembled motor operated value in FIG. 1.

[58] As shown in FIG. 3, according to the invention, first, the valve shaft 33 is inserted into the shaft hole 21c of the casing 2. Then, the connection depressed groove 32b of the opening and closing disk 32, which is adhered to the top surface of the sheet disk 31, is inserted into the connection projection 33b formed in the central area of the bottom face of the flange 33a of the valve shaft 33. At this time, the sealing ring 33c is interposed between the upper and lower faces of the flange 33 a.

[59] Thereafter, the fixing packing 4 is inserted and fixed to the feed hole 22a of the lower portion 22 of the casing 2, thereby finishing the assembling of the water temperature control assembly 1. In this way, the integrated water temperature control assembly 1 is inserted vertically and installed in the chamber 213 of the valve body 210. The latching step 23 formed in the head portion 21 of the casing 2 is rested on the resting step 24 protruded inwards of the upper side of the chamber 213, and the sealing 25 is interposed between the resting step 24 and the latching step 23.

[60] At this state, again, the fixing nut 5 is tightened to the thread portion 6 formed in the outer circumference of the chamber 213 of the valve body 210, thereby finishing a series of assembling procedures. Here, by the tightening force of the fixing nut 5, the sealing 25 interposed between the resting step 24 and the latching step 23 is pressed, thereby providing a tight sealing between the casing 2 and the valve body 210.

[61] The motor operated valve is assembled as described above, at the state where the inlet port 211 and the outlet port 212 of the valve body 210 are connected to the heating piping. The fixing nut 5 is slightly loosened, not tightly fastened such that the water temperature control assembly 1 provided inside the valve body 210 can be slightly rotated.

[62] Then, the shafts are connected in such a manner that the setting groove 222 formed in the casing 2 of the water temperature control assembly 1 is aligned with the reference projection 120 of the driver unit 100. At this time, as described above, the water temperature control assembly 1 can be slightly rotated and thus the reference projection 120 of the driver unit 100 can be simply aligned with the setting groove 222. Then, the connection nut 110 is tightened to the thread portion 21b of the water temperature control assembly 1, thereby finishing the assembling work with the driver unit 100.

[63] In addition, when the components inside the valve body 210, the connection nut 110 is disconnected from the valve body 210 to thereby detach the driver unit 100 from the valve body 210. Then, the fixing nut 5 of the valve body 210 is loosened and only the water temperature control assembly 1 can be removed from the valve body 210 and replaced with a new one. At this time, in order to reduce the replacement cost, part of the internal components of the water temperature control assembly 1 may be replaced, without necessity of replacing the entire water temperature control assembly 1.

[64] Thereafter, as described above, the water temperature control assembly 1 is again assembled to the valve body 210 and then the driver unit 100 is connected thereto, thereby enabling a simplified replacement work.

[65] Industrial Applicability

[66] As described above, according to the present invention, plural separate components, which are provided inside the motor operated valve to be opened and closed by the power of a driver unit having a reference projection and controls the flow rate of the cooling and heating water depending on the rotation by the driver unit, can be integrated. Simultaneously, a setting groove corresponding to the reference projection can be formed together. Thus, when the motor operated valve is installed in a cooling or heating piping, the initial setting of the motor operated valve against the reference projection of the driver unit can be simply and precisely performed. With the motor operated valve installed in the cooling or heating piping, internal component parts can be replaced simply, thereby providing a simplified and efficient repairing and replacement, as compared with the conventional technique where the entire motor operated valve must be removed from the cooling or heating piping.

[67] In addition, in order to provide a tight sealing when assembling, a sealing interposed between the above integrated water temperature control assembly and the valve body can be pressurized to thereby provide more reliable sealing.

[68] Furthermore, each component constituting the water temperature assembly is combined so as to be separated from each other. At the same time, a tight sealing can be provided to a valve shaft, which rotates a water temperature control unit inside the water temperature control assembly, by means of the power of the driver unit. Thus, components, which are to be periodically replaced, can be simply replaced, and also a reliable sealing can be achieved.

[69] The casing constituting the water temperature control assembly is formed of plastic material through an injection molding process, thereby simplifying the manufacturing process and reducing the manufacturing cost therefor.

[70] While the present invention has been described with reference to the particular illustrative embodiments, it is not to be restricted by the embodiments but only by the appended claims. It is to be appreciated that those skilled in the art can change or modify the embodiments without departing from the scope and spirit of the present invention.

[71]

Claims

[1] A motor operated valve for a cooling and heating piping, in which a water temperature control unit of a water temperature control assembly provided inside a valve body is operated by the power of a driver unit having a reference projection and a connection nut to thereby control the flow rate of cooling and heating water passing from an inlet port at one side of the valve body to an outlet port at the other side thereof, wherein the water temperature control assembly is formed of plastic material through an injection molding process, a setting groove is formed in the outer periphery of the top face thereof so as to be engaged with the reference projection of the driver unit, the water temperature control assembly includes a casing having a head portion and a hollow lower portion integrally formed with each other, the head portion having a thread portion formed in the outer circumference thereof so as to be combined with the connection nut of the driver unit, and the hollow lower portion having a feed hole formed at the lower side thereof and a discharge hole formed at the lateral side thereof, thereby allowing the water temperature control assembly to be freely inserted into a chamber of the valve body; and wherein the casing is structured such that the head portion has a diameter larger than that of the lower portion and a latching step is formed in the lower portion, and a thread portion is formed in the outer side of the chamber of the valve body and a fixing nut is fastened to the thread portion to thereby pressurize the upper portion of the latching step of the head portion, thereby fixing the casing to the valve body.