Why do I need to add a buffer water tank in the air source heat pump dual-supply system?

Buffer tank is actually connected in series in the central air-conditioning system to increase the water capacity of the small system, storage of cold or heat, and effectively solve the load fluctuations and frequent start-up of the host brought about by the system is too small, so as to achieve the purpose of extending the life of the equipment and energy saving and power saving.

The main role of buffer water tank

   01/Reduce the number of host startups

　　Due to the limited amount of circulating water in the loop of the air-source heat pump dual-supply system, causing the host to reach the set temperature in a very short period of time, the host will stop working, and then again in a very short period of time, the water temperature reaches the host's start-up conditions, and the host starts up again. Host such frequent start will greatly reduce its service life, and the host in the start for the power consumption, so it also increases energy consumption. After the system is installed buffer tank, equivalent to an increase in the system water capacity, the system temperature changes smoothly, the host startup times are naturally reduced, its service life is greatly extended, but also energy-saving and power saving.

　02/Efficient defrost

　　When used in winter, especially between -3℃ and 5℃, the air source heat pump host is easy to frost. The effect of defrosting on the indoor temperature is a headache, because the unit needs to consume the heat in the pipeline when it is cooling in reverse, if the water system has a small amount of water, then the defrosting time will be elongated, which will result in a lower water temperature in the pipeline, leading to fluctuations in the indoor temperature.

　　If the system is equipped with a buffer tank, then in the defrosting process, because there is a certain temperature inside the tank, so that the defrosting can be completed in a short period of time and consume less heat, avoiding fluctuating changes in indoor temperature due to defrosting of the host computer and ensuring stable operation of the system.

　03/Automatic exhaust

　　When the air source heat pump dual-heating system is running, the high and low water temperatures will repeatedly produce gas, if these gases are not discharged in time, it will cause the system to be unstable, which may lead to frequent alarms on the flow switch or the host high voltage protection reporting faults, or even damage to other components such as water pumps.

Buffer tank into the return pipe, the water pipe connection is up into the bottom, so that the gas in the water will be accumulated in the upper space of the tank, the pressure in the closed system will automatically force the gas from the upper exhaust valve discharge, so that the buffer tank at the bottom of the outlet access to the suction port of the pump because there is no gas, so not only to protect the impeller of the pump, but also reduce the failure rate to report to ensure that the system operates normally.

　04/Prevent system blockage

　　Air source heat pump cascade system is a closed-loop system, and the difference in water quality around the big, long time the water in the pipeline will form algae sludge, coupled with other impurities in the water slowly accumulates more and more, may lead to system clogging, resulting in insufficient water flow system, the host frequently reported failures.

　　If the system is equipped with a buffer tank, these impurities will slowly accumulate to the bottom of the buffer tank through the cycle, the water quality in the system will be better, the bottom of the buffer tank is equipped with a drain valve, it is easy to clean.

　05/Hydraulic decoupling

　　Buffer tank in the water machine two-way system also has a name - coupling tank, the main solution to the system hydraulic balance, the system will be separated from different circulating pipelines, so that all circulating pipelines do not affect each other, which is what we often say the secondary system, the host and the tank is an independent circulatory system, the tank and the end of an independent Circulation system, the host and the end have no direct contact, the host only heats up the water tank and stops starting when it reaches the set temperature, it will not be affected by the end, which greatly increases the stability of the host.