JPH0126987Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Field of Application The present invention relates to a full water level detector for a drain tray provided under a condensed water generating section of an air conditioner (hereinafter referred to as "air conditioner").

2. Description of the Related Art In a drain pan 21 shown in FIG. 1 that receives and discharges water condensed in a heat exchanger of an air conditioner or other condensed water generating parts, a strainer 2 at a drain port 22 is used.
3 becomes clogged, the condensed water does not flow to the drain pipe 24, but flows out from the drain pan 21 as overflowing water. Many accidents have occurred in which floors and ceilings have been soiled due to this overflowing water, and in extreme cases, water overflowing from the air conditioner drain pan 21 wets products, causing serious losses.

However, the reality is that a simple-structured full-water level detector for preventing water from overflowing from the air conditioner drain pan 21 has not yet been developed.

Problems to be solved by this invention Therefore, the problems to be solved by this invention are as follows.
To detect the full water level in an air conditioner drain pan using a simple device.

Means for Solving the Problems Referring to FIGS. 1 and 2, the full water level detector 1 for an air conditioner drain tray 21 according to the present invention has a main body 2 made of an insulating material. The main body 2 consists of a top wall 3 and a skirt portion 4 formed on the outer periphery of the top wall 3.
has a long surface leakage distance. A pair of electrodes 7 and 8 are fixed to the front surface 5 and back surface 6 of the top wall 3 of the main body. The top wall 3 of the main body is held at the full water level F to be detected by the support member 10. A lead wire 11 is connected to both electrodes 7, 8, and the full water level detector 1 is coupled to an external circuit, such as the relay circuit of FIG. 3, by means of this lead wire 11.

If necessary, the electrode 7 on the top wall surface 5 is protected by a retainer 9 made of an insulating material.

Function The function of the full water level detector 1 of the air conditioner drain tray 21 shown in FIG. 1 will be explained. Since the top wall 3 of the main body is always maintained at the full water level F, when the water level L in the drain dish 21 is below the full water level F, both electrodes 7,
8 are not immersed in condensed water and are insulated from each other, and the circuit between them is in an open state. In particular, since the skirt portion 4 has a shape that provides a long surface leakage distance between the electrodes 7 and 8, even if water droplets fly onto the surface of the main body 2 from the heat exchanger of an air conditioner, the electrodes 7, Insulation between 8 is maintained.

When the amount of condensed water in the drain tray 21 increases and its water level L rises to the full water level F, the circuit between the electrodes 7 and 8 is closed by the condensed water. This closed interelectrode circuit is connected to an external circuit such as a relay by a lead wire 11. Therefore, by closing the circuit between the electrodes 7 and 8, it is possible to detect the rise of the water level in the drain pan 21 to the full water level F.

Embodiment Figure 1 shows the full water level detector 1 of the present invention and the drain tray 2.
1 and the case where it is mounted on the bottom plate of the tray 21 are shown. In practice, it is sufficient to use either arrangement. Drain port 22
In the case where the support member 10 is provided with leg portions 10a having a shape that acts as a strainer, the separate strainer 23 may be omitted.

FIG. 3 shows an example of a circuit that connects the full water level detector 1 to a relay 12 to control the power source and issue a full water level alarm. That is, the coil Ry of the relay 12 and the full water level detector 1 are connected in series between the control power supplies P and N, the contact A of the relay 12 is connected to the external alarm circuit, and the contact B is connected to the power source of the air conditioner, etc. Connect to the circuit to be cut off.

Full water level detector for air conditioner drain tray according to the present invention 1
Can be used with other drain dishes or drains with similar structure,
For example, it can be applied to the drain pan of a washing machine, the drain of an indoor type toilet, etc.

Effects of the Invention As explained above, the full water level detector for the air conditioner drain tray according to the present invention has the following effects because it is provided with the skirt portion 4 having a long surface leakage distance.

(a) A detector with a simple structure can reliably detect the full water level of the air conditioner drain pan and prevent water overflow accidents.

(b) If the full water level detector 1 using the support member 10 with an integrally formed strainer is placed at the drain port of the drain pan, a separate strainer can be omitted.

(c) Since the full water level is automatically detected, it is possible to omit checking for clogged strainers, which simplifies maintenance and inspection work.

[Brief explanation of drawings]

FIG. 1 is a schematic sectional view of the present invention, FIG. 2 is a sectional view of a full water level detector, and FIG. 3 is a circuit diagram of a relay circuit. 1... Full water level detector, 2... Main body, 3... Top wall, 4... Skirt part, 5... Front surface, 6... Back surface, 7, 8... Electrode, 9... Holder, 10... Support material, 11... Lead wire, 21... Air conditioner drain pan, F... Full water level.

Claims (1)

[Scope of utility model registration request] a main body made of an insulating material, comprising a top wall and a skirt portion having a long surface leakage distance formed around the top wall;
A pair of electrodes fixed to the front and back surfaces of the top wall of the main body with the surface leakage distance therebetween, a lead wire connected to the electrodes, and a support member for holding the top wall of the main body at the full water level to be detected. Full water level detector for air conditioner drain pan.