JPH0120596Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention prevents electrical insulation from deteriorating due to moisture in the electrical components and appliances of air conditioners installed in locations where rainwater and moisture are likely to enter. The present invention relates to a wiring structure that can prevent such problems.

(Prior technology) Spot coolers, etc. for locally cooling workers working in high-temperature areas of factories, use flexible ducts that fix the air conditioner to the wall of the building outdoors and connect it to a cold air outlet. The general layout is such that the air conditioner is extended to the location where the worker is present, and the electrical wiring within the air conditioner main body is generally done in the following manner as a simple method.

When connecting the terminals of an electrical component box and the terminals of electrical equipment such as compressors and fans using wires of the required thickness and length, it is preferable from the standpoint of insulation protection to route the wires bare. In order to avoid this problem, one tube or several bundles of tubes are usually placed inside a protective tube made of a flexible insulating tube such as a vinyl chloride resin tube, and the end opening of the protective tube is sealed with a tie wrap or putty. was.

(Problems to be solved by the invention) In this way, by covering the electric wire with a protective tube and sealing the end of the protective tube, electrical insulation protection is achieved, and the electric wire is prevented from becoming wet due to moisture. Although this can be prevented to some extent, simple measures such as filling with putty are not sufficient to completely prevent moisture intrusion, and there was a problem that moisture gradually accumulated inside the protective tube during long-term use. .

In particular, when a silicone varnished glass tube is used for wires that must be placed in contact with high-temperature parts, such as compressor wires, water in the protective tube may rise up through the tube.
For example, there were problems such as water entering the electrical equipment box and dampening electrical equipment such as terminal boards and relays, resulting in a decrease in insulation.

In order to address these problems, this invention has been developed for electrical appliances,
This device was devised in an effort to reliably prevent water from entering the electrical equipment box by a simple means.In particular, the protective tube is provided with a drain hole to prevent water from accumulating, while the protective tube is provided with a drainage hole. The purpose is to prevent moisture from penetrating through the wires and into the live parts by devising the arrangement of the pipes and the wires that are housed in them, thereby achieving stable electrical insulation. shall be.

(Means for Solving the Problems) According to the present invention, the electrical component box 3 and the electrical device 2 are disposed in the casing 1, and the terminal portion 10 of the electrical component 2 and the terminal of the electrical component box 3 are arranged in the casing 1. With board 11,
This is a wiring structure for an air conditioner that is connected by an electric wire 8 housed in a protective tube 9 made of a flexible insulating tube, and the protective tube 9 has a water drain hole 12 that penetrates the tube wall in the middle part. In addition, this drain hole 12 is connected to the terminal portion 10 and the terminal board 1.
The protective tube 9 and the electric wire 8 housed in the protective tube 9 are arranged so as to be opened at the lowest level.

(Function) In the present invention, the electric wire 8 that is routed for communication and the protective tube 9 that protects it are curved, for example, in a bow, and the protective tube 9 has a drain hole 12 at its lowest level. Even if water were to infiltrate into the protection tube 9, it would flow down due to gravity and then fall out of the tube through the drain hole 12, causing the water to overflow into the live parts. Water leakage phenomenon is eliminated and electrical appliances and equipment can be protected from moisture.

(Example) An example of the present invention will be described based on the accompanying drawings.

1 and 2 show a spot cooler according to an embodiment of the present invention, in which a casing 1 includes an electrical component box 3 containing a compressor, an electromagnetic switch, a relay, etc. as electrical components 2, and an evaporator. 4, a condenser 5, an evaporator fan 6, a condenser fan 7, etc. are housed, and the evaporator fan 6 introduces outside air from an air intake port opened at the lower right side of the casing 1 to operate the evaporator 4. After passing through the chamber provided in the casing 1, the cold air is blown out from the four cold air outlets 13, 13... provided on the upper right side of the casing 1, and then is blown out to each cold air outlet 13... It is provided to send cold air to a high-temperature workplace through a connected flexible duct (not shown).

On the other hand, the condenser fan 7 introduces outside air from the air suction port opened on the back and left side of the casing 1, sends it to the condenser 5, and cools the condenser 5. It is designed to be released into the atmosphere from the outlet.

The above-mentioned spot cooler is installed along the outer wall of the building, and rainwater is collected from the casing 1.
Since it is easy for air to infiltrate into the casing 1 through the air inlets and air outlets provided in the casing 1, each of the internal devices has a waterproof structure.

The electrical equipment box 3 and each electrical equipment such as the compressor 2, evaporator fan motor, and condenser fan motor are electrically connected to each other using electric wires 8, such as vinyl insulated wires, to transmit power to each electrical equipment. Taking the compressor 2 as an example, the compressor 2 has a general structure in which the compression mechanism is arranged coaxially at the bottom and the motor is arranged coaxially at the top, housed in a housing. has a terminal section 10 at the top of the housing, while the electrical component box 3 has a terminal board 11 at the bottom of the box, and wires 8 are inserted into the terminal board 11 using the wire insertion holes provided at the bottom of the box. The common structure is to connect.

In the illustrated example, the terminal section 10 of the compressor 2 is located at a higher position than the terminal board 11, and when connecting the electric wire 8 between both terminals, a flexible insulating tube, for example, a vinyl By concentrating and storing a plurality of electric wires 8 in a protective tube 9 made of a tube, the electric wires 8 are wired while being protected mechanically and electrically.

Furthermore, the protective tube 9 and the electric wires 8 housed therein are wired in a bowed and hanging state, and in this case, there is a bent bottom that is lower than the terminal board 11 and forms the lowest level. It is curved.

However, in the middle part of the protective tube 9,
A drainage hole 12 is provided through the tube wall at a location corresponding to the bent bottom, as shown in FIG.
A round hole of an appropriate diameter is bored using a tool such as a drill, and this hole is used as the drain hole 12.

When the protective tube 9 having the water drain hole 12 is arranged in a curved state, it is desirable that the water drain hole 12 be located on the bottom wall side so as to open downward.

The water drain hole 12 may, of course, be formed in the form of a cut or a split in addition to the round hole described above.

Although not shown, electric appliances other than the compressor can also be connected to the terminal board 11 based on the same procedure.
Although the protective tube 9 may be used in common if necessary, there is no problem.

The electric wire 8 and protection tube 9 arranged in this manner are sealed with putty or the like at least at the end of both ends of the protection tube 9 that is exposed on the electrical appliance 2 side.

In the spot cooler having the structure described above, even if rainwater enters the casing 1 and gets around the electric wires 8 in the protection pipe 9, the water drain hole 12 exists at the bottom, so that it will not flow down. The water is immediately drained from this drain hole 12, and as the water increases in the protective tube 9, it overflows from the tube end on the lower electrical component box 3 side, for example, and drains into the box 3.
There will never be any inconvenience such as water flooding inside.

(Effect of the invention) As described above, the present invention allows the protective tube 9 and the electric wires 8 housed therein to be connected to the electrical equipment 2 and the electrical equipment box 3 so that the water drain hole 12 is opened at the lowest level.
Since the wiring is connected between the protective tube 9 and the electrical component box 3, even if water enters the protective tube 9, it can be drained reliably and there is no standing water. Inconveniences such as wetting the inside and lowering the insulation are eliminated.

In this way, it is possible to insulate and protect electrical components and maintain high quality stability.

[Brief explanation of drawings]

1 and 2 are a partially omitted front view and a partially cutaway plan view of an air conditioner according to an embodiment of the present invention, and FIG. 3 is a partially enlarged view of FIG. 2. DESCRIPTION OF SYMBOLS 1...Casing, 2...Electrical equipment, 3...Electrical component box, 8...Electric wire, 9...Protection tube, 10...Terminal section, 11...Terminal board, 12...Drain hole.

Claims (1)

[Scope of utility model registration request] An electrical equipment box 3 containing electrical equipment such as an electromagnetic switch and an electrical equipment 2 such as a compressor are arranged in the casing 1, and a terminal section 10 of the electrical equipment 2 and a terminal board 11 of the electrical equipment box 3 are arranged in the casing 1. In this air conditioner, a water drain hole 12 is provided in the middle part of the protection tube 9 and penetrates through the tube wall, and this water The punch hole 12 is connected to the terminal portion 10 and the terminal board 1.
1. A wiring structure for an air conditioner, characterized in that a protective tube 9 and an electric wire 8 housed in the protective tube 9 are arranged so as to be opened at the lowest level.