JPS5842808Y2 - Drain high switch trap - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drain trap that facilitates the drain treatment of an air conditioner.

Generally, in order to discharge the condensate generated by an air conditioner to the outside of the machine, if the in-machine blower creates negative pressure in the drain pan, measures must be taken to prevent smelly air in the drain piping and air in the machine room from flowing back into the machine. is necessary.

For this reason, it has conventionally been common practice to provide a U-shaped drain trap in the drain outflow pipe to form a water seal.

However, in order to install a U-shaped trap on the drain pipe, the position of the drain pan must be raised, and for this reason, the foundation of a floor-standing air conditioner must be raised, and the space inside the ceiling must be raised for a ceiling-hidden air conditioner. Consideration has been given to installing it as high as possible.

However, there is a limit to how high the position of the drain pan can be, and special consideration is required when the position of the drain pan is low.

For example, when a floor-standing air conditioner has a low foundation, measures such as those shown in FIGS. 1 and 2 have been adopted.

That is, in the conventional example shown in FIG. 1, since the water level 2 in the drain pan 1 is low, an example is shown in which a U-shaped trap 4 is partially embedded in the floor slab 5 and attached to the drain outflow pipe 3.

However, burying the U-shaped trap 4 in the floor slab 5 in this way requires a lot of effort during installation work, and special care is required when drilling holes in a machine room or a waterproof floor slab.

Furthermore, when the inside of the drain pan 1 is maintained at negative pressure, the water level 6 in the outer pipe of the U-shaped trap 4 drops by the difference in pressure between the inside and outside of the machine, and construction work is required to lower the following horizontal draw pipe 7 and take the slope. I need.

FIG. 2 shows a conventional example in which the U-shaped trap 4 is erected in an inverted U-shape instead of being buried in the slab 5 as shown in FIG.

However, if you set up trap 4, the drain water surface 2
(If the pressure inside the machine is negative, the pressure difference between the outside and outside of the machine will rise further.) Therefore, the wall of drain pan 1 must be raised, and special consideration must be given to the arrangement of the heat exchanger inside the machine and the shape and dimensions of the machine. No.

The purpose of the present invention is to eliminate the need to raise the position of the drain pan when processing drains from floor-standing or ceiling-hidden air conditioners, and to eliminate the need for special drain drainage construction as shown in Figures 1 and 2. To provide a drain trap that can be formed extremely easily without requiring a drain trap.

In other words, the main part of the drain trap of the present invention is a lid that opens when the drain water pressure exceeds a predetermined value and closes when the drain water pressure falls below a predetermined value, at the outer end of the drain outflow pipe that discharges the drain in the drain pan of the air conditioner. Install and configure.

Hereinafter, a detailed explanation will be given with reference to an example of the trap of the present invention shown in FIG.

FIG. 3 shows a schematic cross section of an example of the drain trap of the present invention, in which the outer end 8 of the horizontal drain outflow pipe 3 for discharging drain from the drain pan 1 of the air conditioner to the outside of the machine is guided to the open air container 9. A trap is formed by attaching a lid 11 that opens and closes with a hinge 10 to the outer end 8.

This lid 11 has a sufficient area to cover the opening at the outer end 8,
Moreover, when the outer end 8 is closed, an airtight contact state is maintained.

In the illustrated example, the outer end 8 is slightly inclined (the lower end protrudes), and the lid 11 rests on this inclined end surface with its own weight using the fulcrum 10 to maintain airtightness.

The ingenious feature of this inventive trap is that negative pressure is generated inside the drain pan 1 by the blower (not shown) in the air conditioner (a heat exchanger is placed at the top of the drain pan 1 to suck in return air). When the drain water level 2 in the drain pan 1 falls below a predetermined value, pressure is applied to the drain in the drain outlet pipe 3 in the direction toward the drain pan 1, and the backflow of this drain draws the lid 11 to the outer end 8. The purpose is to cause the action of contact to occur.

That is, when the pressure applied to the drain at the bottom end of the outer end 8, which is open to the outside air, is equal to the outside air (that is, when there is a negative pressure inside the machine by h), the lid 11 remains at an equilibrium position between the outside air pressure and the drain water pressure. , if the drain water level 2 rises, the lid 11 is intermittently closed.
is opened to allow the drain to drip into the container 9.

Therefore, this lid 11 functions as a check valve that allows the drain to flow out only when the water pressure of the drain increases to a predetermined pressure or higher.

The drain dripped into the container 9 which is open to the outside air is drained into the horizontal drain pipe 7.
can be easily drained.

In addition, a spring is interposed in the lid 11 so that the lid 11 has elasticity and a resistance corresponding to the amount of drain to be stored is applied to the lid 1.
It can also be given to 1.

Furthermore, the outer end of the drain outlet pipe can be tapered to make the opening smaller, or the slope of the cut at the outer end can be changed to adapt to the characteristics of the air conditioner used.

Moreover, it is not limited to the floor-standing type, but can also be used as a ceiling-concealed type and other types as appropriate.

In this way, the drain trap of the present invention has an extremely simple structure, so it can easily form a water seal and act as a check valve, and it does not require the necessary height of a U-shaped l/wrap, so it can easily prevent air from entering the drain. There is no need to make the drain pan of the conditioner particularly high, and there is no need for special construction as shown in FIGS. 1 and 2.

Furthermore, since the outer end of the drain outflow pipe is provided at a position open to the outside air, inspection and cleaning are easy, installation is simple, and construction and maintenance are extremely simplified compared to conventional examples.

[Brief explanation of the drawing]

FIGS. 1 and 2 are cross-sectional views showing an example of drainage treatment for a conventional air conditioner with a low foundation, and FIG. 3 is a cross-sectional view showing an example of the drain trap of the present invention. Reference numbers in the figure represent the following: 1... Drain pan, 2... Drain water surface, 3... Drain outflow pipe, 4... U-shaped trap, 5... Floor slab , 8... Outer end of drain outflow pipe, 9... Container, 10...
・Hinge, 11...Lid.

Claims (1)

[Scope of utility model registration request] The outer end of the horizontal drain outflow pipe that discharges the drain from the drain pan of a ceiling concealed type or floor-mounted air conditioner has an inclined end face with the lower end protruding, and the upper part is rotatably supported on this inclined end face with a lid. A drain drain trap that is covered with a lid that rests under its own weight, and opens the outer end when drain water pressure exceeds a predetermined value, and closes when the drain water pressure falls below a predetermined value.