JPH0146785B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a water chiller directly connected to a water supply system that supplies chilled drinking water, and in particular automatically adjusts the flow rate of the primary tap water pressure using an electromagnetic automatic flow rate control valve. In the secondary side water pressure generated downstream of the valve, the water pressure fluctuates due to the rapid flow of water at the moment the solenoid valve operates, preventing abnormal water from jumping out from the fountain outlet and preventing the secondary side during use. The purpose is to prevent the fountain from falling turbulently due to minute fluctuations in water pressure and to stabilize the point at which the fountain falls.

Conventionally, in water coolers directly connected to the water supply, a mechanical automatic flow control valve is opened by manually pressing a push button or operating a foot pedal, and tap water pressure is used to spray water from the fountain outlet for drinking.

However, with this type of structure, if the primary water pressure fluctuates, the water splashes out and the fountain falls into an unstable position, so it is not possible to mechanically adjust the flow rate control valve manually according to the primary water pressure. It is common practice to adjust the water fountain condition by operating the main valve, or by further operating the main valve. However, because water pressure constantly fluctuates depending on location, time of day, etc., even though the flow control valve has an adjustable structure, manual adjustment by the water cooler installer is not enough to accommodate fluctuations in primary water pressure. In some cases, the fountain may come out abnormally and wet the faces and walls of users.
In addition, the predetermined falling position of the fountain into the water tray is disturbed, causing problems such as water scattering and wetting the floor.
Furthermore, there is no conventional water cooler that can control minute fluctuations in the secondary water pressure downstream of the flow rate control valve, and it is a fountain with less turbulence that swings back and forth with respect to a predetermined falling position. I couldn't get it.

The present invention attempts to solve the above-mentioned conventional problems.

Hereinafter, the present invention will be described with reference to the accompanying drawings showing one embodiment thereof.

In FIGS. 1 and 2, a water chiller main body 1 includes an electric compressor 2, a condenser 3, an evaporation pipe 4 wound around the outer circumference of a water storage tank 5, etc., connected by refrigerant piping (not shown). It has a refrigeration cycle. On the other hand, a water storage tank 5 provided in the main body 1 has an evaporation tube 4 wrapped around its outer periphery, and as the refrigerant evaporates within the evaporation tube 4, the water in the water storage tank 5 is cooled. At the top of the water storage tank 5, there is a first water supply pipe 6 that is directly connected to the water supply and a second water supply pipe 7 that leads the cooling water in the water storage tank 5.
is provided. The first water supply pipe 6 has a flanged socket 1 having a threaded part for direct connection to the water supply.
3 is brazed and fixed, and is connected and fixed to the underframe 15 via a socket fixing fitting 14. Reference numeral 8 denotes an electromagnetic automatic flow control valve, which is configured to electrically open and close the valve by operating a push button 23 or a foot pedal 24. This electromagnetic automatic flow control valve 8 has two functions: stopping or supplying the cooling water led out from the second water supply pipe 7, and controlling the primary side tap water pressure to stabilize the flow rate.
It is fixed to the frame 15 by appropriate means. and,
A pipe joint 9 is screwed onto the outlet side of the electromagnetic automatic flow control valve 8, and a hose 10 for controlling the secondary side water pressure is connected to this. A pipe joint 11 for connecting to a water fountain 12 is provided at one end of the hose 10 to form a series of water circuits directly connected to a water supply.

Next, the structure of the hose 10 will be explained in detail with reference to FIGS. 3 and 4.

In the same figure, a hose 10 is housed inside a flexible pipe 17, and a part of its peripheral wall is made of synthetic rubber or soft resin material that can be deformed by water pressure, and usually has a groove extending in the axial direction of the pipe. An extensible portion 16 having a substantially V-shaped cross section with the bottom thereof as the bottom portion is formed. As shown in FIG. 4, four extensible parts 16 are provided at symmetrical positions, and when water pressure is applied to the internal passageway 19, the elasticity of the material and the internal pressure will cause the expansion and contraction parts 16 to expand outward. The internal volume varies greatly. That is, in this hose 10, the expandable part 16 temporarily expands outward at the moment when the electromagnetic automatic flow control valve operates, so that the volume increases and absorbs water pressure fluctuations on the secondary side.

Therefore, the flow of water sprayed from the water fountain 12 is stabilized by the expansion and contraction action of the hose 10, and abnormal splashing and fluctuations in the falling point can be reduced. Further, both ends 21 and 22 of the hose 10 have a cylindrical shape and can be inserted into the pipe joints 9 and 11 to a predetermined depth to facilitate connection. Further, the flexible pipe 17 is made of a cylindrical rubber or soft resin material so as to cover the hose 10, and by arranging the flexible pipe 17, abnormal expansion of the hose 10 can be prevented.
The hose 10 is protected from exceeding its strength limit. The flexible pipe 17 is provided with a plurality of ventilation holes 20 having a predetermined diameter to communicate the space 18 between the hose 10 and the flexible pipe 17 with the outside air, and when the elastic part 16 of the hose 10 receives water pressure, It makes it easy to expand. The hose 10 and flexible pipe 17 are inserted into pipe joints 9 and 11 and fixed by hose bands 25 and 26, as shown in FIG. 5, so that they are supported by main body 1 via pipe joints 9 and 11. .

In the above configuration, the hose 10 that receives water pressure on the downstream side, that is, the secondary side, of the electromagnetic automatic flow rate control valve 8 is installed so as to be gradually inclined upward toward the water fountain 12, so that air cannot flow into the hose 10. It can also eliminate the buildup. As a result, it is possible to eliminate abnormal splashing of water containing air.

The aim of the present invention is to enable the use of an electromagnetic automatic flow control valve 8 in a water cooler directly connected to the water supply, and to control the secondary water pressure generated downstream of the electromagnetic automatic flow control valve.

That is, the instantaneous water pressure caused by the opening of the electromagnetic automatic flow rate control valve 8 is absorbed by the rapid expansion of the elastic part 16 of the hose 10, and the force of the expansion causes the hose 1 to
The air located on the outer periphery of the air vent 20 is discharged to the atmosphere through the vent hole 20, thereby making the pressure absorption by the elastic part 16 even smoother.

Then, as the water pressure stabilizes, the expandable part 16
Due to its own elasticity and atmospheric pressure through the vent hole 20, it contracts until it is in equilibrium with the water pressure, thereby stabilizing the water pressure on the pipe joint 11.

Of course, even if the water pressure fluctuates during continuous jetting, the telescopic part 16 will expand and contract to follow the fluctuation due to the atmospheric pressure and the stretching force of the hose 10.
To stabilize the flight distance of water spouted from a water fountain 12.

Therefore, according to this embodiment, the following effects can be expected.

(1) Since the electromagnetic automatic flow control valve 8 can be used, there is no need to operate the lever mechanism required for conventional mechanical flow control valves, the number of parts can be reduced, and assembly work can be reduced. can be easily performed, and there is no need to adjust the operations related to push operation and pedal operation, and the number of assembly steps can be reduced.

(2) As the hose 10 expands in the diametrical direction, it can temporarily absorb the water pressure on the secondary side, which prevents the fountain from popping out abnormally.This stabilizes the point at which the fountain falls, and the water This prevents water from scattering and also prevents the floor from getting wet due to this.

In this embodiment, a structure in which the elastic portions 16 are formed at four locations on the hose 10 has been described, but similar effects can be expected with a structure in which the elastic portions 16 are formed at two locations as shown in FIG. can.

As is clear from the above embodiments, the secondary side water pressure control device for a water cooler according to the present invention is provided with a double pipe section in which a hose is disposed inside the pipe body on the downstream side of the flow rate control valve, and the The hose is deformable by water flow pressure, and usually has an expandable section with a substantially V-shaped cross section with a groove extending in the tube axis direction at the bottom, and further includes a section in the tube body between the inside of the tube and the outside of the hose. The tube is equipped with a vent hole that communicates the air layer located in the tube with the atmosphere, and because the hose expands in the radial direction continuously in the tube axis direction, it responds sensitively to changes in water pressure. In addition, since atmospheric pressure is applied to the expansion and contraction of the hose,
When the hose expands and contracts, communication between the air layer and the atmosphere through the ventilation holes alleviates the rapid expansion and contraction of the hose caused by its reaction. Due to the expansion and contraction of this hose, the water pressure from the flow control valve to the spout is reduced to an appropriate level in the event of rapid water pressure fluctuations at the start of drinking or fluctuations in water pressure during continuous spouting, and the water pressure that is spouted from the spout is reduced to an appropriate level. stabilize. As a result, the point at which the fountain falls can be stabilized, thereby preventing the water from suddenly spraying onto the user's desired surface or from splashing too much and wetting the floor. Furthermore, since a single hose is sufficient for the structure, a complicated structure is not required, and the structure can be simplified, which has various advantages.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a water cooler equipped with a secondary water pressure control device according to an embodiment of the present invention, FIG. 4 is a sectional view taken along the line A-A in FIG. 3, FIG. 5 is a perspective view of the main part of the water cooler including the secondary side water pressure control device, and FIG. 6 is another embodiment of the present invention. It is a sectional view of the secondary side water pressure control device in an example. 6...First water supply pipe, 7...Second water supply pipe, 8...
Electromagnetic automatic flow control valve, 10...Hose, 16...
... Telescopic part, 17... Flexible pipe (double pipe part).

Claims (1)

[Claims] 1. In a water cooler equipped with a series of water circulation circuits that are directly connected to the water supply, a double pipe section with a hose installed inside the pipe body is installed in a part of the water circulation circuit provided on the downstream side of the flow control valve. The hose is deformable by water flow pressure, and usually has an expandable portion having a substantially V-shaped cross section with a groove extending in the tube axis direction at the bottom, and further includes a tube inside the tube. A secondary side water pressure control device for a water chiller equipped with a vent hole that communicates the air layer located between the hose jacket with the atmosphere.