JPH0454413Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a water level sensor cap structure for holding a water level sensor that detects the water level in a container.

(Prior Art) For example, in an air conditioner installed at a high place such as a ceiling-embedded air conditioner, there are cases where the drain is discharged by a drain pump. If a malfunction occurs, the water level in the drain pan may rise and cause an overflow, so a water level sensor is usually installed to detect the water level in the drain pan and issue a signal when the water level rises abnormally. usually,
As shown in Fig. 8, this water level sensor is supported within a cylindrical cap 2' with an open bottom end for the purpose of holding the sensor 1' itself and protecting it from the influence of wind etc. It's summery. The sensor 1' is fitted with a flange 5' formed at an intermediate portion of the sensor 1' into a groove 4' formed in a boss 3' protruding from the inner peripheral surface of the cap 2'. By tightening it, it is held in a vertical position.

(Problem to be solved by the invention) When the sensor 1' is held in the cap 2' as described above, the sensor 1' is inserted into the groove 4' by fitting the flange part 5' However, as shown in the chain line in FIG. 8, the flange portion 5' may be positioned above or below the boss portion 3' by incorrectly assembling the position. A sensor 1' may be installed. Since it is difficult to confirm such incorrect installation of the sensor 1' from the outside, there is a problem in that it causes malfunction of the water level sensor.

This invention was made in view of the above points,
The purpose of this is to prevent the water level sensor from being erroneously assembled by preventing the water level sensor from being installed in a position other than the correct position on the cap.

(Means for Solving the Problems) In the present invention, as a means for solving the above problems, as shown in the drawings, a cylindrical cap body 25 with an open lower end is divided into a pair of vertically divided caps. A boss portion 28 is formed of cylindrical pieces 25a, 25a, and has a groove 27 on the inner peripheral surface of each cylindrical piece 25a, into which a flange portion 29 formed at the intermediate portion of the needle-shaped water level sensor 24 is inserted. At the same time, protrusions 30, 30 are formed on the inner circumferential surface of the cylindrical piece 25a at upper and lower positions of the boss 28, and act to prevent the flange 29 from being inserted.

(Function) In the present invention, the following effects can be obtained by the above means.

That is, when assembling the water level sensor 24 into the cap body 25, the flange portion 29 of the water level sensor 24 may be erroneously positioned above or below the boss portion 28 other than the groove 27, which is the normal assembly position. In this case, the insertion of the flange portion 29 will be prevented by the protrusion 30 formed on the inner peripheral surface of the cylindrical piece 25a constituting the cap body 25, making it impossible to assemble the water level sensor 24. Become.
Therefore, incorrect assembly of the water level sensor 24 can be reliably prevented.

(Embodiments) Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

The water level sensor of this embodiment is used to detect the water level in the drain pan of a ceiling-embedded air conditioner.

The ceiling-embedded air conditioner of this embodiment is an air conditioner that is suspended and supported above an opening 3 formed in a ceiling C via hanging bolts 4, 4, as shown in FIGS. 6 and 7. Machine body (hereinafter referred to as the main body) 1
and the opening 3 is in contact with the lower surface of the main body 1.
and a decorative panel 2 configured to cover the.

The main body 1 includes a substantially rectangular casing 5, a U-shaped air heat exchanger 6 disposed inside the casing 5, and a centrifugal fan 7 disposed inside the air heat exchanger 6. , 7, and a drain pan 10 disposed below the air heat exchanger 6. That is, the air heat exchanger 6 is arranged so as to surround the side of the fan 7, and the air is sucked in by the fan 7 from the air suction port 8 of the decorative panel 2 located below. After that, heat is exchanged with the air W blown out in the centrifugal direction by the fan 7, and this is made into conditioned air. The conditioned air W obtained in this way flows through the four blow-off passages 11, 11, 11, 11 formed at the outer peripheral edge of the drain pan 10.
The air is blown into the room from air outlets 9, 9, 9, 9 formed in the decorative panel 2 to correspond to these blow-off passages 11, 11, 11, 11, thereby performing indoor air conditioning. Reference numeral 12 is a drain pan support plate, 13 is a fan motor, and 14 is an air heat exchanger 6.
15 is a support bolt for supporting the drain pan support plate 12;
16 is a bracket coupled to the hanging bolt 4;
7 is a mounting bracket provided on the decorative panel 2 side, 18 is a mounting bolt for mounting the decorative panel 2 to the main body 1, 19 is a suction grill, and 20 is a filter.

In the drain pan 10, the drain pan 10
A drain pump 21 is provided for pumping up drain water d (see Fig. 1) stored in the drain water d. A water level sensor unit 23 is attached.

As shown in FIGS. 1 to 5, the water level sensor unit 23 includes a needle-shaped water level sensor 24 configured to output an electric signal upon contact with drain water d, and a water level sensor 24 in a vertical position. It consists of a cap body 25 configured to be held in place. As shown in FIG. 5, the cap body 25 includes a substantially semi-cylindrical cylindrical piece 2 that is vertically divided into two and connected via a hinge part 26 so as to be freely openable and closable.
5a, 25a, both cylindrical pieces 25a, 25
By combining the parts a, a cylindrical body with an open bottom end is constructed. At the middle part in the height direction on the inner circumferential surface of each cylindrical piece 25a,
A boss portion 28 having a semicircular groove 27 into which a flange portion 29 formed at the middle portion of the water level sensor 24 is inserted is integrally formed. In other words,
By fitting the flange portion 29 of the water level sensor 24 into the grooves 27, 27, the water level sensor 24 is held in a vertical position.

Thus, at the upper and lower positions of the boss portion 28 on the inner peripheral surface of one side of the cylindrical pieces 25a, 25a, there are protrusions 30, 30 that protrude centripetally from the inner bottom surface of the groove 27, respectively. It is integrally protruded. Due to the presence of the protrusion 30, the flange portion 29 can be moved upwardly or downwardly from the boss portion 28.
insertion is to be prevented, as shown in phantom in FIGS. 3 and 4.

1 to 5, reference numeral 31 is an air vent hole, 32 is a vertical hole formed in the center of the boss portion 28 for inserting a water level sensor, 33 is a rib for preventing the water level sensor 24 from swinging; 34 is a through hole for pulling out a lead wire 35 connected to the water level sensor 24, 36 is a mounting piece for attaching the cap body 25 to the bracket 22 of the drain pump 21, and 37 and 38 are cylindrical holes constituting the cap body 25. These are a locking convex piece and a locking claw piece for combining the pieces 25a, 25a.

With the above configuration, when assembling the water level sensor 24 into the cap body 25, the flange portion 29 of the water level sensor 24 can be placed above or below the boss portion 28 other than the groove 27, which is the normal installation position. If the cap body 25 is placed in the wrong position, the flange portion 2
9 is blocked, and the water level sensor 24 cannot be assembled. Therefore, incorrect assembly of the water level sensor 24 can be reliably prevented.

It goes without saying that the present invention is not limited to the configuration of the above-described embodiments, and that the design can be modified as appropriate without departing from the gist of the invention.

(Effect of the invention) As described above, according to the invention, the cylindrical cap body 25 with an open lower end is constituted by a pair of cylindrical pieces 25a, 25a divided in the vertical direction, and each of the cylindrical pieces A boss portion 28 having a concave groove 27 into which a flange portion 29 formed at the intermediate portion of the needle-shaped water level sensor 24 is inserted is provided protrudingly on the inner peripheral surface of the piece 25a. Since the protrusions 30, 30 are formed at the upper and lower positions of the boss portion 28 and act to prevent the insertion of the flange portion 29, when assembling the water level sensor 24 into the cap body 25, the water level sensor 24 is If the flange portion 29 is mistakenly positioned above or below the boss portion 28 other than the normal assembly position of the concave groove 27, the flange portion 29 formed on the inner peripheral surface of the cylindrical piece 25a constituting the cap body 25 may The flange portion 29 is prevented from being inserted by the raised protrusion 30, making it impossible to assemble the water level sensor 24.
This has the practical effect of reliably preventing incorrect assembly.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view showing the cap structure of a water level sensor according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of FIG. 1, FIG. 3 is a cross-sectional view of FIG. 1 is a cross-sectional view, FIG. 5 is a developed view of the cap body shown in FIG. FIG. 7 is a plan view, FIG. 7 is a cross-sectional view along the line taken from FIG. 6, and FIG. 8 is a vertical cross-sectional view showing the cap structure of a conventionally known water level sensor. 24... Water level sensor, 25... Cap body, 25a... Cylindrical piece, 27... Concave groove, 28...
Boss portion, 29...Flange portion, 30...Convex strip.

Claims (1)

[Scope of utility model registration request] A cylindrical cap main body 25 with an open lower end is composed of a pair of cylindrical pieces 25a, 25a divided in the vertical direction, and a needle-shaped water level sensor 24 is provided on the inner peripheral surface of each cylindrical piece 25a. A boss portion 28 having a concave groove 27 into which a flange portion 29 formed on the portion is inserted.
At the same time, protrusions 3 are provided at upper and lower positions of the boss portion 28 on the inner peripheral surface of the cylindrical piece 25a, and act to prevent the insertion of the flange portion 29.
The cap structure of the water level sensor is characterized by forming 0.30.