JPH04139346A - Drain pump controller for air conditioner - Google Patents

Abstract

PURPOSE:To prevent inhibition of room cooling operation due to operation of a float switch caused by a rise in a surface level of drain water in a water tray by operating a drain pump for a predetermined time irrespective of operation.nonoperation of the switch only at the time of starting the room cooling operation. CONSTITUTION:When a user starts room cooling operation of an air conditioner, a drain pump 1, a timer function of a microcomputer in a compressor controller 6 are operated, and the pump 1 is forcibly operated for a T time. After the T time is elapsed, the operation of a float switch is judged. If a water level is raised, a compressor is stopped, and overflow of drain water can be prevented. Accordingly, after previous room cooling operation is finished, one drain water adhered to a heat exchanger is dropped on a water tray, its water level is raised, and the switch is operated, but when the pump is once operated, the switch can be returned to a reset state, and the room cooling operation can be restarted.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a drain pump operation control device for an air conditioner equipped with a drain pump.
The explanation will be explained with reference to Figure 1. This figure shows the water receiver that stores the drain water generated in the air-inside heat exchanger. 6 is a control device equipped with a microcomputer that controls these operations. In this configuration, when the water level rises and the float switch is activated, the operation of the air conditioner is stopped. Although restarting the operation is not possible unless the float switch is restored, Figure 3 shows the operation of the float switch 5. (There is a magnet inside the float 6, and the reed switch inside the column 7 is turned on and off by moving the float up and down.) 4th
The figure shows a flowchart of drain pump operation. When cooling operation starts, if float switch 5 is inoperative (water level is low), the compressor is turned on and the drain pump is turned on. If the water level rises for some reason and the float switch is activated, the compressor is turned off and the drain pump is turned on. OFF
Problems that the SUMO invention aims to solveHowever, in the conventional drain pump operation control (when the capacity of the pan is small, the drain water that has condensed and adhered to the heat exchanger after the cooling operation is finished) The drain water gradually flows down and the level of the drain water rises, causing the float switch to go into operation, and even after starting operation, the float switch is still operating, so cooling operation cannot be started.To solve this problem. Means In order to solve the above-mentioned problems, the present invention has the following features: a water receiver for storing drain water condensed and generated in an indoor heat exchanger of an air conditioner; a drain pump for discharging the drain water; A float switch that operates when the temperature rises and a microcomputer that controls the operation of the air conditioner are installed, and the float switch is activated only when cooling operation starts.
It is equipped with a control for operating the drain pump for a certain period of time regardless of whether it is inoperable or not.
The float switch operates only when cooling operation starts.
By operating the drain pump for a certain period of time regardless of whether it is not working or not, drain water that adhered to the heat exchanger at the end of the previous operation and could not be drained will accumulate in the water tray, and the water level will rise, causing the float switch to close. Embodiment The following is an explanation of an embodiment of the present invention.
1 shows the configuration of the main parts of the air conditioner according to an embodiment of the present invention (shared with the conventional example), 1 is a drain pump, 2 is a waste water list, and 3
4 is an indoor heat exchanger, 4 is a water receiver IL5 is a float switch that monitors the water level of drain water, and 6 is a control device equipped with a microcomputer that controls the operation of the air conditioner.With the above configuration, cooling operation is started. Then, the moisture in the air condenses in the indoor heat exchanger 3, turns into water droplets, falls down, and accumulates in the tray 4. Figure 2 is a flowchart showing the flow of cooling operation. When the user starts cooling operation of the air conditioner, the microcomputer in the drain pump 1, compressor (not shown) controller 6 The timer function operates for the LT time (several minutes), and the drain pump 1 is forced into operation, and when the 4T time has elapsed, the float switch operation is determined for the first time. When the water level rises, the compressor stops to prevent drain water from overflowing. Therefore, even if the drain water that was attached to the heat exchanger when the previous cooling operation started flows down into the water tray and the water level rises and the float switch is activated, by operating the drain pump once, The float switch can be returned to the reset state, and the cooling operation can be resumed. The water receiver that stores the drain water generated by condensation in the container has a dish, a drain pump that discharges the drain water, a float switch that operates when the water level of the drain water rises, and controls the operation of the air conditioner. By installing a microcomputer that operates the drain pump for a certain period of time only when cooling operation starts, regardless of whether the float switch is activated or not, the indoor unit is configured with a water receiver that has the capacity of a dish. If the (capacity) cannot be secured, the drain pump is forcibly turned on for a certain period of time at the start of operation.

[Brief explanation of drawings]

FIG. 1 ζ A cross-sectional diagram showing the configuration of the main parts near the drain pump of an air conditioner showing an embodiment of the present invention and a conventional example.
Fig. 2 is a flowchart showing the operation of the drain pump of the present invention, Fig. 3 is an explanatory diagram showing the operation of the float switch, Fig. 4 is a conventional drain pump, 3.
...Indoor heat exchanger 4...Water receiver JIL5...
・Float Sui Sochi, 6... Name of control device agent Patent attorney Akira Okaji and 2 others Fig.

Claims (1)

[Claims] A water tray for storing drain water generated by condensation in an indoor heat exchanger of an air conditioner, a drain pump for discharging the drain water, a float switch that operates when the water level of the drain water rises, and an air conditioner. A drain pump control device for an air conditioner, which is provided with a control device equipped with a microcomputer that controls the operation of the conditioner, and operates the drain pump for a certain period of time regardless of whether the float switch is activated or not, only at the start of cooling operation.