Air Conditioner Water Pump Timing for Freeze-Aware Drainage
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Solution Overview
Problem
The turn-on timing of the water pump in air conditioners is not smart enough, leading to potential damage from frozen water in the chassis and energy waste due to inefficient operation.
Innovation Solution
A method and device that determine the turn-on timing of the water pump based on the state of the liquid level switch, working state of the air conditioner, and outdoor ambient temperature, including detection of heating or defrosting modes and preset temperature thresholds to optimize the pump's operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the water pump is turned on immediately when the air conditioner operates in heating mode, then the condensed water can be discharged in time, but the water pump may be damaged when the water in the chassis is frozen
Solution Approach 1:
The control device performs preliminary detection of the liquid level switch state and outdoor temperature before turning on the water pump. When the liquid level switch is on and outdoor temperature is above the freezing point, the water pump is turned on in advance to discharge condensed water, preventing water accumulation and freezing damage without unnecessary operation when conditions are not favorable.
Solution Approach 2:
The control device continuously monitors the liquid level switch state and outdoor temperature, using this feedback information to dynamically adjust water pump operation. The system only activates the water pump when both conditions are met (liquid level switch on and temperature above freezing), creating a closed-loop control that prevents damage while ensuring timely water discharge when needed.
2Reliability
If the water pump is turned on for a long time to ensure complete water discharge, then all condensed water can be removed, but energy is wasted due to excessive operation
Solution Approach 1:
The control device uses the liquid level switch as a feedback mechanism to monitor water accumulation in real-time. The water pump operates only when the liquid level switch detects water presence, and stops when the water is discharged and the switch turns off, eliminating unnecessary continuous operation and reducing energy waste while ensuring complete water removal when needed.
Solution Approach 2:
The liquid level switch automatically controls the water pump operation based on water accumulation conditions. When water reaches a certain level, the switch activates the pump; when water is discharged, the switch automatically stops the pump, making the system self-regulating without requiring external intervention or excessive energy consumption.
3Device complexity
If the water pump operation is controlled only by the liquid level switch without considering outdoor temperature, then the control is simple, but the water pump may be damaged when the water in the chassis is frozen
Solution Approach 1:
The control device merges the liquid level switch signal with outdoor temperature detection into a unified control logic. Both conditions must be satisfied (liquid level switch on AND temperature above freezing) to activate the water pump, creating a combined control system that maintains relative simplicity while preventing pump damage through temperature-aware decision-making.
Solution Approach 2:
The control device acts as an intermediary between the liquid level switch and the water pump, introducing temperature as an additional decision factor. Rather than directly connecting the switch to the pump, the control device evaluates both liquid level and temperature conditions, mediating the activation decision to prevent damage while maintaining systematic control.
Data Source
AI summary
The present disclosure has disclosed an water pump of an air conditioner as well as a method and device for controlling the same, wherein the method for controlling an water pump of an air conditioner comprises: obtaining a state of a liquid level switch of the air conditioner, a state of operation of the air conditioner and an outdoor ambient temperature; and determining a turn-on timing of the water pump of the air conditioner according to the state of the liquid level switch of the air conditioner, the state of operation of the air conditioner and the outdoor ambient temperature obtained. The present disclosure solves the problem that the turn-on time of the water pump of the air conditioner in the prior art is not smart enough, so as to make the turn-on time of the water pump of the air conditioner more intelligent, whilst improving the safety of the water pump of the air conditioner is improved, and saving the energy.