JPH0720476U - Three-way valve for cooling and heating - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention is configured with a cylinder-shaped cylinder having an extremely simple structure in place of a complicated valve mechanism that has been conventionally used, and heat exchange is performed by rotationally driving the cylinder-shaped cylinder. Its main purpose is to perform water supply from a coil in a straight line or to perform operations such as switching control of the water supply to a bypass pipe easily and surely. [Structure] At the intersection of the internal T-shaped water passages a and a of the T-shaped valve casing 1, a circular cylinder cylinder 2 having a water passage hole 3 at the center of the shaft is provided. The heat exchange coil A is installed so as to be rotatable at 90 to 180 ° with respect to the water flow direction.
It is configured so that the further water flow can be carried out in a direct manner or by switching to the bypass bus B. Further, a T-shaped branch pipe C is integrally connected to the valve casing 1 via a bypass pipe B to form an overall shape of H and the T-shaped branch pipe C is formed.
In the inside of the above, a hemispherical strainer 4 is fitted to the intersection of the T-shaped water supply channel C so that the opening surface 4a is inclined downwardly with respect to the water supply direction in a slanting manner.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a three-way valve for a cooling / heating machine that controls switching of water supply of a heat exchange coil for cooling / heating of a cooling / heating air conditioner such as a fan coil unit.

[0002]

[Prior art]

 Conventionally, the valve opening is closed or opened by using the repulsive force of springs and other opening / closing operations by various valve mechanisms as means for controlling cooling, cooling of hot water heat exchange coils, distribution of hot water, and drainage. The flow direction of the water flowing in the valve was controlled and the switching was performed.

[0003]

[Issues to be solved by the device]

 However, since the material of the spring is almost metallic, the valve action is extended and the valve action becomes sluggish during repeated use, so it is difficult to open and close the valve opening reliably, and it is difficult to open and close the valve inside the valve housing. It has the drawback that the water flowing through it cannot be regulated, and the mechanism that moves the valve body by a cam or screw action to open and close the valve hole also causes impurities such as water stains to adhere to the operating part over many years of use. It is difficult to expect a reliable operation by doing so, and most of these are composed of many parts, so it was said that the structure is complicated and the assembly work is complicated and expensive. is there. Recently, the use of a spherical valve as a valve mechanism to replace the above has been developed, but even with such a spherical valve, accurate fitting and support in the valve casing requires considerable technology, and it may be necessary to perform cleaning replacement. At the time of maintenance work, it was completely impossible to take out the valve ball from the inside of the casing unless the connecting parts such as the valves fastened to both sides of the valve casing were removed.

This invention is intended to fundamentally solve the above-mentioned various drawbacks. It uses a very small number of parts and has a simple structure. At the same time, it automatically filters out impurities such as fine dust contained in the circulating water and constantly supplies beautiful cold and hot water to the heat exchange coil to protect and manage the heat exchange coil. The main purpose of this invention is to provide a convenient three-way valve for cooling and heating machines.

[0005]

[Means for Solving the Problems]

 As a means for solving the above problems, the electric two-way valve according to the present invention has a T-shaped structure in which valve connecting portions a and b are provided on both sides and a bypass connecting portion c is provided in the middle portion, as shown in the drawings. At the intersection of the internal T-shaped water passages a and b of the valve casing 1 to be formed, a cylinder cylinder 2 having a water passage hole 3 at the center of the shaft is formed in the water flow direction of the water passage a. It is arranged so as to be orthogonal and rotatable 90 ° to 180 °, and configured so that the water flow from the heat exchange coil A is made to flow straight or by switching to the bypass pipe B by the rotating action of the rod-shaped cylinder 2. It is characterized by that.

Further, a T-shaped branch pipe C having a T-shaped water supply channel C formed therein is integrally connected to an end portion of the by-pass pipe B to form an H-shape as a whole.

Further, a hemispherical strainer 4 is fitted inside the T-shaped branch pipe C and at an intersection of the T-shaped water supply channel C so that the opening surface 4a is inclined downward with respect to the water supply direction. It also has a structure to remove the fine dust mixed in the water supply at the same time.

[0008]

[Action]

 The operation will be described below. For example, the entire H-shaped three-way valve according to the present invention is used for cooling, and the upper and lower valve connecting portions a and e are connected to the inlet and outlet portions of the heat exchange pipe of the heat exchange coil A for hot water through the valve connecting tool. Fasten and connect integrally. In such a state, during the season when cooling and heating are required, a certain amount of cooling and hot water is passed through the heat exchange coil A for hot water. First, the drive motor (not shown) is energized to drive the drive shaft. When rotating 5, the rod-shaped cylinder 2 that is interlockingly connected with the drive shaft 5 rotates 90 to 180 ° with respect to the water flow direction in the valve casing 1 and the rotation of the water passage hole 3 formed in the shaft portion. Due to the displacement, the water flow from the heat exchange coil A flowing in the water passage a is stopped or discharged. Also, in some cases, a predetermined heat exchange function is achieved by switching the direct current water flow by the rotation of the circular cylinder 2 to the by-pass pipe B and sending it again to the heat exchange coil A via the T-shaped branch pipe C. The aim is to make the most effective reuse of the heat content of the cold and hot water without randomly disposing of the finished cold and hot water to the outside, and to greatly reduce the heat energy used. Further, due to the action of the circular cylinder 2, the water may be directly discharged to the outside through the bypass tube B without sending the water to the heat exchange coil A side.

Further, a T-shaped branch pipe C having a hemispherical strainer 4 fitted in the pipe is attached to the water inlet side of the heat exchange coil A to remove impurities in the water feed at the same time as the water feed described above. It is also possible to send beautiful cold and warm water to the heat exchange coil A without dust.

[0010]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. 1 is a T-shaped valve casing integrally having valve connecting portions a and b on both sides and a bypass connecting portion c in an intermediate portion thereof. Further, a straight water passage a that communicates with the both-side connecting ports and a by-pass water passage a that communicates with the water passage a in a T shape are formed. The valve body, which is the main part of the present invention, has a circular rod-shaped cylinder 2 having a water passage hole 3 of an appropriate diameter that can penetrate through the center of the valve shaft from the front to the back and the intersection of the T-shaped water passages a and b. Further, a part is provided so as to be orthogonal to the water flow direction and rotatable and removable at an angle of 90 to 180 °. Further, the circular cylinder 2 is rotated in a certain direction by the rotational drive of a drive shaft 5 which is linked with an electric motor (not shown) shaft. Due to the rotating action of the cylinder cylinder 2, the position of the water passage 3 of the cylinder 2 is displaced so that the water flow that can be returned from the heat exchange coil A goes straight, or the water can be easily switched to the by-pass water passage a to perform water supply. The cylinder cylinder 2 can be easily taken out by removing the valve lid 6 fitted on the side surface of the valve housing 1, and is configured to facilitate maintenance such as cleaning and replacement. .

Further, the bypass pipe B connected to the valve casing 1 is a water pipe having an appropriate length, and is a T-shaped pipe having a T-shaped water conduit U formed inside at one end thereof. -Shaped branch pipe C is detachably integrally connected. Both ends of the straight side are connected and fastened to the water supply pipe D and the water inlet pipe E of the heat exchange coil A for cold and hot water, and the whole shape is fixed as described above. It is formed into an H shape together with the valve casing 1.

Further, as shown in FIG. 2, a hemispherical hemispherical strainer 4 is provided in the inside of the T-shaped branch pipe C and at the intersection of the T-shaped water supply channel C with the opening surface 4a directed toward the water supply side. It is inserted into the downwardly inclined body in a slanted manner, and is constructed so that it can be detachably fitted in the branch pipe C like the above-mentioned circular cylinder cylinder 2.

[0013]

[Effect of device]

 As described above, the three-way valve for a cooling / heating machine according to the present invention is different from the conventional valve plate, spherical valve, etc., and is simply a pole cylinder 2 having a water passage hole 3 at the center of the shaft. Since it has a simple and simple structure, it does not require any complicated structural parts for the valve mechanism, only a few parts are required, there is almost no fear of failure, and various operations such as maintenance as well as assembly are performed. By removing the valve lid 6, there is an effect that it can be taken out to the outside very easily and a reliable work can be performed.

Further, as described in claim 2, the T-shaped valve casing 1 having the rod-shaped cylinder 2 built therein and the T-shaped branch pipe C connected to the water inlet portion of the heat exchange coil are formed in an H shape. Therefore, by-pass pipe B with valve mechanism is pre-cooled and formed to have the same length as the distance between the water inlet and the water outlet of heat exchange coil A for hot water. It may be possible to immediately connect and attach.

Further, as described in claim 3, a hemispherical hemispherical strainer 4 is provided inside the T-shaped branch pipe C and at an intersection of the T-shaped water supply channel C with the opening surface 4a in the water supply side direction. On the other hand, by slantingly inserting into the vertically downwardly oriented body and inserting it, impurities in the water flowing in the water supply channel can be filtered surely regardless of the flow direction, and pure cold and hot water can be obtained. It is possible to always send the heat to the heat exchange coil A naturally. Moreover, since the strainer 4 can be easily attached and detached, it also has an advantage that maintenance work such as cleaning and replacement is easy.

[Brief description of drawings]

FIG. 1 is an overall view of mounting a three-way valve according to the present invention on a heat exchange coil,

FIG. 2 is a vertical sectional front view clearly showing an internal mechanism.

[Explanation of symbols]

 2 circular cylinder 3 water passage 4 hemispherical strainer

Claims (3)

[Scope of utility model registration request] 1. An internal T-shaped water passage a, b of a valve casing 1 in which valve connecting portions a and b are formed on both sides and a by-pass pipe connecting portion c is formed in an intermediate portion to form a T shape. A cylindrical cylinder having a water passage hole 3 formed in the center of the shaft is inserted into the portion so as to be orthogonal to the water flow direction of the water passage a and rotatable 90 ° to 180 °. A three-way valve for a cooling / heating machine, characterized in that the water flow from the heat exchange coil A is made to flow directly or by switching to the bypass pipe B by the rotating action of the cylinder 2. 2. A three-way valve having a cylinder type cylinder two-valve mechanism inside according to claim 1, wherein a by-pass pipe B is provided.
A three-way for a cooling / heating machine characterized in that a T-shaped branch pipe C having a T-shaped water supply channel C formed therein is integrally connected to an end portion of the to form an H-shaped overall shape. valve. 3. The three-way valve having the structure according to claim 2, wherein the hemispherical strainer 4 is provided inside the T-shaped branch pipe C and at the intersection of the T-shaped water supply channel C with the opening surface 4a. A three-way valve for a cooling / heating machine characterized by being inserted in a slanting downward shape with respect to the water supply direction.