Home / Heat Pump Blog / Branche nyheder / Industry News / Multiple Protections of Air Source Heat Pumps

Multiple Protections of Air Source Heat Pumps

Visninger:0     Forfatter:Site Editor     Publiceringstid: 2019-12-05      Oprindelse:Websted

Since the advent of air source heat pump (ASHP), it has been famous for its energy-saving and safety. It can be said that there is almost no threat to personal safety. Now this is the question: do you know how ASHP is designed to keep its safety? This article will introduce several protection functions of air source heat pump.

SPRSUN Air Source Heat Pump Project

High Pressure Protection

High pressure protection refers to the function implemented by the high-pressure protector. When the condenser's temperature is too high, the unit will stop the operation of the compressor. The high-pressure operation is very harmful to the unit, which will cause high exhaust temperature, increased operation current and reduced efficiency. The compressor's temperature will become too high, the friction part of the compressor will get deteriorated due to the sharp drop of the oil viscosity, and the operation life will be shortened.

When the temperature of engine oil and Freon exceeds 135℃, the phenomenon of carbon dissociation may also occur, which will cause irreversible chemical changes and damage the unit. Thus, air source heat pump water heater must have the function of high pressure automatic protection.

Low Pressure Protection

This protection is implemented by the low-pressure protector. When the pressure of the evaporator is too low, the heating capacity of the heat pump will decrease, the exhaust temperature will decline, and even the unit will lose its heating capacity. Some frost might appear at the evaporator in advance. Because of the decrease of the working quality, the friction heat of the compressor cannot be taken out. As a result, the temperature of the compressor body is increased and the wear is intensified.

Over-current Protection

When the current through the compressor coil increases abnormally and exceeds the maximum current allowed by the compressor, the over current protector acts to force the compressor to stop running. This generally indicates a serious compressor failure. When this phenomenon occurs, it is necessary to first check whether the winding of the compressor is abnormal, and check whether there is turn-to-turn short circuit, short circuit and compressor stuck.

Water Flow Switch Protection

Whether there is water flow in the heat pump water heater is also a necessary condition for the unit to start. The purpose is to prevent the operation of the water pump when it is out of water. Also this function can avoid high condenser temperature as well as other failures. When the heat pump receives the start command, it will first detect whether the water flow switch is on. Only if there is water flow can the switch be turned on, and then other items will be detected in turn. The compressor will be started once everything is normal.

Water Temp Sensor Failure Protection

Whether the heat pump works or not must have the water temperature signal input, so when the unit cannot detect the signal or the signal drifts and changes to a large extent beyond the range permitted by the controller, the automatic controller will stop the heat pump unit. The reason for this failure is the open circuit, short circuit or quality problem of the temperature sensing probe. For example, the change of resistance value cannot reflect the water temperature correctly because the temp sensor gets wet. In such case, the open circuit or short circuit failure should be handled or replaced before restart.

Evaporator Temp Sensor Failure Protection

This is similar to the water temperature sensor failure protection. It is also necessary for air source heat pump to know the temperature signal of the evaporator before it starts to work, the purpose of which is to determine whether the system needs to defrost and stops the fan operation in order to prevent the compressor exhaust temperature from getting too high. If the ASHP cannot detect the signal, it will also shut itself down to protect the unit.

Relaterende varmepumpe artikler

  • Why Does My Swimming Pool Heat Pump Freeze Up?


    During the winter season, some ice on your pool heat pump is a common occurrence. However, when the whole unit is covered in ice, there is a concern for worry as your device won't function well and might be at risk of getting damaged.This article focuses on people who want to use their pool heat pum læs mere
  • A Complete Guide: Air Source Heat Pump Costs


    Heat pumps have surprisingly become a ‘necessary’ appliance for their ability to offer a convenient and reliable energy source for anyone looking to warm their pools or stay warm indoors. If you want to invest in a heating or cooling unit, heat pumps are undoubtedly a suitable option to suit your ne læs mere
  • The Best Air Source Heat Pump Manufacturers of 2022


    Air source heat pumps are a highly efficient and renewable heating solution for many property owners. These valuable appliances help save money on energy bills, have a low carbon footprint, have a high Seasonal Coefficient of Performance (SCOP), can be utilized for heating and cooling, have low main læs mere
  • Why choose an inverter heat pump to heat your pool?


    It's frustrating and uncomfortable to swim while the weather is a bit cold. With the weather shifts, temperatures can drop substantially, especially during cloudy days or winter. A significant drop in temperature can render a pool useless. About 90 % of pools in the U.S. are used two to three times læs mere

Recommended Heat Pump Products

Luft kilde Monoblok varmepumper til varmt vand/husopvarmning

Guangzhou SPRSUN New Energy Technology Development Co., Ltd.

Professionel varmepumpeproducent siden 1999
No.15 Tangxi Road, Yinsha lndustrial Park, Xintang, Zengcheng , Guangzhou, Guangdong, China, 511338

Kontakt SPRSUN. 7/24 Support. Vi svare med det samme!

Tel: 0086-20-82181867
Mobil: 0086-18933985692
WhatsApp: 0086-18933985692

Populær navigation