JPH0345056Y2 - - Google Patents

Description

[Detailed description of the invention] <Technical field> The present invention relates to an air conditioner that evaporates drain water by scattering it on an outdoor heat exchanger, and a rotation speed detection structure of a slinger ring that scatters this drain water. Pertains to.

<Prior Art> In general, a slinger ring is well known in which drain water generated indoors is guided to the outdoor side, and this drain water is scattered and sprayed onto an outdoor heat exchanger.

By the way, when this slinger ring is driven by a motor dedicated to driving the slinger ring, if the motor is broken or stopped for some reason and the operation is continued, the amount of drain water gradually increases and there is a risk of overflowing.

Therefore, by monitoring the rotation speed of the slinger ring,
When a failure occurred, the compressor was stopped to prevent the drain water from increasing further.

By the way, as a method of detecting the rotation speed of the slinger ring, a magnet is provided on the rotating shaft connected between the motor and the slinger ring, and a Hall element is provided opposite to this magnet, and the output of the Hall element is Conventionally, a printed circuit board equipped with a Hall element and peripheral circuit elements is placed near the magnet, and this Hall element printed circuit board and the main printed circuit board (air conditioner control (equipped with circuit elements for the 1990s) were connected using lead wires equipped with connectors.

However, with this structure, since the Hall element is relatively close to the motor, it is necessary to provide a shield plate to prevent the motor's magnetic influence on the Hall element, and a separate board for the Hall element is required. In addition, the number of accessory parts such as lead wires with connectors increases, and the cost increases due to the increase in the number of parts and the complexity of assembly work.

Moreover, the Hall element is formed as an IC that integrates the Hall element and the amplifier circuit into one chip, but if a human body charged with static electricity comes into contact with the Hall IC, there is no place for the static electricity to escape, and it can be easily destroyed. It would have been damaged.

Especially in the case of the conventional structure, the printed circuit board on which the Hall IC is mounted is relatively small with only a few capacitors, resistors, etc., including the Hall IC, so there is a possibility that the human body etc. may come into contact with the Hall element during assembly. It was big.

<Purpose> The present invention was developed in view of the above points, and includes a rotating shaft that incorporates a Hall element, etc. into the main control circuit board, and is connected to a slinger ring so that a magnet faces the Hall element. The above problem is solved by extending in the opposite direction.

<Example> Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an external perspective view of an embodiment of the present invention, and FIG. 2 is a side sectional view.

In FIG. 1, 1 is a main body, and a suction port 2, a suction port 3, and an operating section 4 are provided on the front side.

In FIG. 2, 5 is an outdoor heat exchanger which acts as a condenser during cooling.

Reference numeral 6 denotes a drain tank provided below the outdoor heat exchanger 5, into which drain water 7 generated in the indoor heat exchanger (not shown) is guided through a passage. It is stored.

Reference numeral 8 denotes a slinger ring whose lower part is immersed in the drain water 7 in the drain tank 6. This slinger ring 8 is placed on the back side of the heat exchanger 5, and is rotated to stir up the drain water 7. It scatters and blows onto the heat exchanger 5.

A motor 9 rotationally drives the slinger ring 7, and has a rotating shaft 10 that is disposed on the front side of the heat exchanger 5, passes through the heat exchanger 5, and is connected to the slinger ring 8.

This rotating shaft 10 extends from the rotor (not shown) of the motor 1 in a direction opposite to the slinger ring 8 side, and a magnet 1 is attached to the tip of this extended shaft 10.
1 is provided.

12 is a main control circuit board on which circuit elements necessary for controlling the air conditioner are mounted;
Reference numeral 2 is provided with an electrical equipment board assembly 15 that includes a terminal board 13, a capacitor 14 for compressor operation, and the like. The tip of the shaft 10 having the magnet 11 is extended to the vicinity of the substrate 12, and a Hall element 16 is provided on the substrate 12 facing the magnet.

17 is a second substrate.

Therefore, when the motor 9 is driven, the slinger ring 8 rotates and the magnet 11 rotates at the same rotation speed, and the Hall element 16 detects this.

<Effects> According to the present invention, the Hall element is mounted on the main control circuit board, and the rotating shaft of the motor connected to the slinger ring is extended so that the magnet provided at the tip faces the Hall element. As a result, there is no need for lead wires between the dedicated printed circuit board and the main board on which the conventional Hall element is mounted, and the motor and Hall element are placed relatively far apart. Therefore, it is possible to reduce costs by reducing the number of parts and work.

Furthermore, since the Hall element is incorporated into a relatively large main board, there is less possibility that a human body or the like will come into contact with the Hall element, resulting in high reliability and simple assembly work.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an embodiment of the present invention, and FIG. 2 is a side sectional view of the same. 5... Outdoor heat exchanger, 6... Drain tank, 7...
... Drain water, 8 ... Slinger ring, 9 ... Motor, 10 ... Rotating shaft, 11 ... Magnet, 12 ... Main control circuit board, 16 ... Hall element.

Claims (1)

[Claims for Utility Model Registration] A drain tank for storing drain water is provided below the outdoor heat exchanger, and a slinger ring is provided that is driven by a motor and scatters the drain water from the drain tank to the outdoor heat exchanger. In this method, the rotating shaft connected from the motor to the slinger ring passes through the motor and is extended in the opposite direction to the slinger ring side, and the tip of the extended rotating shaft is placed near the control circuit board on which the control circuit components are mounted. An air conditioner characterized in that a magnet is provided at the tip of the air conditioner, and a Hall element is provided for the magnet on a control circuit board.