Analysis┃The function, selection and principle of air conditioning condensate lift pump At present, there are many brands in the central air-conditioning market. However, as to whether air-conditioning condensate water lift pumps and air-conditioning condensate lift pumps should be installed in air conditioners, various brands and merchants have different introductions. Users also have little knowledge of whether to use lift pumps. Therefore, refrigeration Encyclopedia today will update the knowledge on the function and operating principle of the condensate lift pump. I hope everyone has to help.
The indoor unit of a household central air conditioner is in a low temperature state during cooling, especially the lowest surface temperature of the evaporator may be only 5°C, which is much lower than the dew point temperature of the indoor air. When the indoor air touches the evaporator, the water vapor in the air will condense into water and attach to the surface of the evaporator of the air conditioner. Therefore, a drain pan needs to be installed under the evaporator of the indoor unit.
However, if it takes a long time, the accumulation of water will increase, and it must be drained in time, so there is a condensate pipe. Because the water flows to a low place, if you don't install a lift pump, you can only drain it naturally. This will reduce the height of the ceiling, and it will feel depressed for users whose floor height is not high.
However, for home improvement places, indoor units are generally mounted on top, and there is almost no room for improvement. The advantages of the lift pump cannot be used, and there is no point in bringing the lift pump. For example, the figure below shows that there is almost no space from the condensate pipe connection above the indoor unit to the ceiling.
In order to solve the shortcomings of high pressure suppression caused by the natural drainage of the condensate pipe, there is a condensate water lift pump.
Three characteristics of condensate lift pump
First, it can raise the height of the suspended ceiling to prevent space depression. The indoor floor height of commercial houses is generally about 2.7~2.9 meters, the floor height is not very high, the lower the thickness of the ceiling, the better, because it is equipped with a condensate lift pump, gravity drainage is not used, and the pipeline has no slope, so the ceiling height can be reduced , Has a greater advantage in space design. In the figure below, the direct net layer height is increased by more than 250mm.
Second, it can improve the drainage patency and prevent the roof from foaming. The internal unit of the air conditioner without a water pump can only be used for natural drainage. The disadvantage of natural drainage is that it is easy to drain or the drainage is not clean. If there is no drainage slope, it is possible that the condensed water will pour into the drain pan, which will cause the ceiling to leak and destroy the original decoration of the house.
With the condensate lift pump, there will be some disadvantages:
1. The initial investment is expensive for a pump (300~400 yuan).
2. The indoor unit with lifting pump has about 20W more power consumption in summer than the indoor unit without lifting pump.
3. Two more fault points (pump body, float switch).
4. One more noise source.
Selection and working principle
Selection: Determine the amount of condensed water according to the cooling capacity of the unit, and then select the corresponding device. The displacement of the selected water pump must be greater than the amount of condensate produced per hour by the condensate of the air conditioning unit. At the same time, the influence of the vertical height and horizontal length of the drainage pipe on the displacement of the pump should be considered.
Principle: The liquid level switch is responsible for detecting the liquid level and sending a signal to the water pump through the control circuit. The float rises to a certain height, starts the water pump to drain, the float drops to a certain height, and the pump stops running; if the system fails and cannot drain normally, an alarm is reached Liquid level, the alarm switch is automatically activated.
Replace the water pump
Turn off the power before replacing the pump. Loosen the screw on the back of the system, unplug the water pump, and replace it with a new pump. There are three sockets on the water pump plug. One socket is marked with a ground wire. This socket should be connected to the green and yellow wire plug. The remaining two sockets are connected to the power supply. It can be connected to the other two plugs (black wires). connection. After connection, please insert the wires into the module, add the sealing gasket, install the screws, and fasten the water pump. This article comes from okmarts.com.
