+86 15215554137 tyler@lnashp.com

Maanshan Leomon Energy-Saving Technology Co. LTD
  • Home
  • About us
  • Products
    • Air Source Heat Pumps
      • Domestic Heat Pumps
      • Commercial Heat Pumps
      • Industrial Heat Pumps
    • Heat Pump Cylinders
    • Swimming Pool Heat Pump
      • Residential Swimming Pool Heat Pump
      • Commercial Swimming Pool Heat Pump
      • Spa Heat Pump
    • Hot Water Heat Pumps
      • Domestic Hot Water Heat Pumps
      • Commercial Hot Water Heat Pumps
    • Underfloor Heating Heat Pumps
    • High Temperature Heat Pumps
    • Cold Climate Heat Pumps
      • Low Temperature Heat Pumps
      • EVI Heat Pumps
    • Geothermal Heat Pump
      • Ground Source Heat Pump
    • DC Inverter Heat Pumps
  • News
    • Company news
      • new projects of heat pumps
      • patent of heat pumps
    • Industry-news
  • Projects
    • Heat Pumps for Hospital for Heating and Hot Water
    • Radiant Floor Heating and Cooling with Air Source Heat Pump
    • Air Conditioner Floor Heating and Hot Water in One Heat Pump for a 200 Square House
    • Heating and Cooling Heat Pumps for Swimming Pool
  • Blog
    • Advantages of Leomon Technology Heat Pumps
    • What Is a Heat Pump and How Does It Work?
    • Heat Pumps vs. Air Conditioners
    • Why Are EVI Inverter Heat Pumps More Suitable for Cold Regions
    • Air Water Heat Pump Floor Heating vs. Electric Underfloor Heating
    • How to Choose a Pool Heater: Gas Heater, Heat Pump or Solar Heater?
    • How to choose Floor Heating Heat Pumps
    • Are heat pump water heaters worth the cost?
    • What is the Differences between Air to Water Heat Pumps and Electric Water Heaters
    • 7 Advantages of Heat Pumps
    • Disadvantages of Heat Pumps
  • Contact us

Industry-news

  1. Home
  2. News
  3. Industry-news
  4. What should I do if the air source heat ...

What should I do if the air source heat pump is frosted? How to solve the problem after frost

Defrosting failure means that the air source heat pump water condenser cannot defrost accurately when it is running in winter. There are many reasons. It may be that the unit itself cannot correctly determine the degree of frosting, cannot defrost in time, or "repeatedly" defrost when there is no frost; it may also be that the four-way reversing valve does not act properly when the unit executes the defrost command. If the defrosting power is too small, the "power" of the evaporator is offset by the heat loss, and the melted water cannot be discharged smoothly, causing large areas to freeze. These may make the heat pump incapable of working.

Ordinary air source heat pump products have inherent shortcomings in winter operation: from fin spacing, circulation design, controller's judgment of frost layer, system oil return and refrigerant liquid balance, there are defects in many aspects. For example, it is impossible for the controller to accurately judge whether the frost layer has formed and the severity of the frost layer only based on the evaporator temperature and cumulative operating time. The messy defrosting procedure cannot cope with different regions and different climatic conditions. Therefore, the defrosting effect of such an air source heat pump water device is relatively poor.

For maintenance personnel, what can be done is to clean the evaporator fins before the coming of winter to keep the fins good heat transfer capacity; according to the local climate settings, as far as possible in line with the local defrosting parameters (and for some continuous defrosting The settings of the air source heat pump water heaters that cannot be changed can be helpless); adjust the time controller, try to arrange the unit to work and store more hot water when the air temperature is high during the day; check and ensure the reliability of the auxiliary heating system Increase the daily inspection of the unit to prevent the outdoor unit from freezing; prevent the unit from increasing the possibility of frosting due to the shortage of refrigerant, and so on.

The air source heat pump has the unique advanced PID three-state defrosting method.

The three states mainly refer to three states: time, fin temperature, and ambient temperature.

PID refers to the proportional integral analysis of the above-mentioned three states, and the logic operation analysis of the change trend of the fins of the unit under different ambient temperatures in winter can be more accurately judged the frosting and defrosting of the unit.

For example, when operating at ambient temperature of -5°C, if you only judge based on the operating time and fin temperature, it will defrost without frost on the fins of the unit when the temperature is low. And through the three-state PID analysis of the change trend of the difference between the ambient temperature and the fin temperature, the frosting speed and severity of the fin surface of the unit can be correctly judged, so that when the frosting affects the energy efficiency of the unit When it is larger, it will enter defrosting. Normally, it will enter defrosting when the heating capacity of the unit drops to 75% of the initial heating capacity. The defrosting is also judged based on the rising speed of the fin temperature per unit time.

Listed as:

●When the defrosting time is 0-4 minutes and the fin temperature reaches 6℃, it can be judged that the unit has a good defrosting effect and can exit the defrosting;

●When the defrosting time is 4-6 minutes and the fin temperature reaches 8℃, it can be judged that the unit has a good defrosting effect and can exit the defrosting;

●When the defrosting time is 6-10 minutes and the fin temperature reaches 10℃, it can be judged that the unit has a good defrosting effect and can exit the defrosting;

●When the defrost time reaches 10 minutes, the unit will forcibly exit the defrost.

●In this way, it is possible to avoid the phenomenon that the exit temperature is a fixed value and cannot be exited immediately according to the defrost progress.

The three-state PID analysis defrosting method can not only completely defrost, but also achieve more energy saving.

How to solve the frosting of air source heat pump

Related News

United Kingdom: Achieve the annual target of 600,000 heat pump installations in 2028

United Kingdom: Achieve the annual target of 600,000 heat pu

What is the difference between ultra-low temperature air source heat pump and ordinary air source heat pump?

What is the difference between ultra-low temperature air sou

How does the cooling and heating air source heat pump realize the cooling and heating functions?

How does the cooling and heating air source heat pump realiz

Do you know what are the main factors that affect the operation of the air source heat pump system host?

Do you know what are the main factors that affect the operat

Winter is coming, what air source heat pump units should pay attention to to prevent cold waves

Winter is coming, what air source heat pump units should pay

How to take anti-freezing measures for air source heat pumps to safely pass the heating season

How to take anti-freezing measures for air source heat pumps

Product Categories

  • Air Source Heat Pumps
    • Domestic Heat Pumps
    • Commercial Heat Pumps
    • Industrial Heat Pumps
  • Heat Pump Cylinders
  • Swimming Pool Heat Pump
    • Residential Swimming Pool Heat Pump
    • Commercial Swimming Pool Heat Pump
    • Spa Heat Pump
  • Hot Water Heat Pumps
    • Domestic Hot Water Heat Pumps
    • Commercial Hot Water Heat Pumps
  • Underfloor Heating Heat Pumps
  • High Temperature Heat Pumps
  • Cold Climate Heat Pumps
    • Low Temperature Heat Pumps
    • EVI Heat Pumps
  • Geothermal Heat Pump
    • Ground Source Heat Pump
  • DC Inverter Heat Pumps

Links

Latest Post

  • How to choose an air source water heater
    How to choose an air source water heater
    2021-02-26
  • Why does the maximum outlet temperature of the air source water heater only reach 60℃?
    Why does the maximum outlet temperature
    2021-02-20
  • Precautions for the use of air source water heaters
    Precautions for the use of air source wa
    2021-02-13
  • China Air Source Heat Pump Manufacturer

    LatestPost

    • How to choose an air source water heater
      How to choose an air source water heater
      2021-02-26
    • Why does the maximum outlet temperature of the air source water heater only reach 60℃?
      Why does the maximum outlet temperature
      2021-02-20
    • Precautions for the use of air source water heaters
      Precautions for the use of air source wa
      2021-02-13

    Feedback

    Contact Us

    1124502703

    +86 15215554137

    +86 15215554137

    tyler@lnashp.com

    kellysunny3

    Cihu Technical Area, Maanshan. China

    MOBILE WEBSITE

    Copyright © 2016 Maanshan Leomon Energy-Saving Technology Co. LTD All Rights Reserved.

    • Skype.
    • E-mail
    • Whatsapp
    • Inquiry
    Inquiry Us Now !
    Inquiry Us Now !