Shenzhen Yierp Technology Co., Ltd. is a professional enterprise engaged in the research, development, production, and sales of air source heat pump products. We are a leading expert in China's air source heat pump industry. We offer dozens of products across multiple series, including residential, commercial, low-temperature dual-supply, low-temperature triple-supply, and high-temperature models, as well as supporting products such as water heaters and high-temperature dryers, meeting the needs of various industries.
Advanced Production Equipment
Our company employs precision machinery such as CNC lathes, automated welding robots, and high-precision stamping machines to ensure accuracy in key components like compressors and heat exchangers, resulting in high-quality products with a stable pass rate of over 99.8%.
Strict Quality Control
A robust quality management system is in place, adhering to ISO9001 and ISO14001 standards. Our company conducts comprehensive testing, including 72-hour continuous load and high/low-temperature simulations, ensuring that all products meet the highest standards.
0EM/ODM
Our company has developed a strong global presence with a focus on Europe, North America, and ASEAN markets. The company offers region-specific products such as ultra-low temperature air-source heat pumps for Northern Europe and AHRI-certified systems for North America, ensuring customized solutions that meet local climate and regulatory requirements.
Our Service
Our company offers detailed pre-sales consultation, customized solutions, and efficient production tracking. The company also provides standardized installation, on-site technical training, and rapid after-sales support with a nationwide hotline, ensuring customers receive continuous assistance throughout the product lifecycle.
Superior Energy Efficiency
The EVI DC inverter heat pump utilizes advanced EVI technology, enhancing the heat pump’s performance even in extreme cold conditions. This results in superior energy efficiency and reduced heating costs throughout the year.
Ideal for Cold Climates
With its Enhanced Vapor Injection (EVI) technology, the heat pump operates efficiently in harsh winter conditions, ensuring optimal heating output even in colder climates where traditional heating systems may struggle.
Versatile Installation Options
EVI DC inverter heat pump offers great flexibility in installation. It can be used in both new construction and retrofitting projects, working as a standalone solution or integrated with existing HVAC systems, making it adaptable to various building designs.
Environmentally Friendly
By utilizing advanced refrigerants and energy-saving technologies, the EVI DC inverter heat pump minimizes greenhouse gas emissions, reduces the carbon footprint, and helps promote sustainable heating practices.
Smart Controls and User-Friendly Interface
Equipped with intelligent controls, the EVI DC inverter heat pump allows users to easily monitor and adjust settings, customize heating schedules, and track energy consumption for better energy management and increased comfort.
Sustainable and Reliable Heating
Combining energy-efficient technology with environmentally friendly design, the EVI DC inverter heat pump provides reliable, comfortable heating year-round while reducing dependency on fossil fuel-based systems, contributing to a greener, more sustainable future.

Home Heating and Cooling
EVI DC inverter heat pumps provide efficient year-round climate control by reversing the refrigerant cycle to heat in winter and cool in summer, ensuring optimal indoor comfort in all seasons.
Water Heating
EVI DC inverter heat pumps absorb heat from the surrounding air and transfer it to water, achieving an Energy Efficiency Ratio (EER) of 2.0 to 4.0, efficiently meeting the hot water needs of both residential and commercial applications.
Refrigeration Systems
In temperature-sensitive applications such as refrigerators, freezers, and pharmaceutical cold storage, EVI DC inverter heat pumps offer precise temperature control to prevent fluctuations and maintain product quality.
Commercial Applications
In supermarkets, restaurants, and office buildings, these heat pumps serve dual functions: providing space conditioning and refrigeration, while recovering waste heat for water heating or warming indoor spaces, ensuring energy savings.
Industrial Processes
EVI DC inverter heat pumps are ideal for industries requiring precise thermal control, offering both low-temperature cooling and high-temperature heating, making them suitable for applications like mold temperature control and drying processes.
Pool and Spa Heating
For outdoor pools and spas, EVI DC inverter heat pumps efficiently maintain water temperature by absorbing ambient air heat, offering 300-600% efficiency and significantly reducing operating costs compared to traditional heaters.
Thermal Energy Storage Systems
EVI DC inverter heat pumps are used in smart energy systems to generate and store chilled or heated water during off-peak hours, reducing energy costs and supporting peak demand management.

|
Model |
YEP-030DC |
YEP-040DC |
YEP-050DC |
YEP-060DC |
YEP-080DC |
||
|
Power Supply |
VIHz/Ph |
220-240/50/1 |
220~240/50/1,380-415/50/3 |
380-415/50/3 |
|||
|
HeatingA7W35 |
Rated Heting Capacity |
kw |
10.0 |
13.5 |
19.1 |
22.2 |
29.2 |
|
Input Power |
kw |
2.3 |
3.1 |
4.4 |
5.1 |
6.7 |
|
|
COP |
|
4.33 |
4.34 |
4.35 |
4.35 |
4.36 |
|
|
HeatingA7W45 |
Rated Heting Capacity |
kw |
8.6 |
11.5 |
16.4 |
18.7 |
24.8 |
|
Input Power |
kw |
2.4 |
3.2 |
4.6 |
5.2 |
6.9 |
|
|
COP |
|
3.58 |
3.59 |
3.59 |
3.60 |
3.60 |
|
|
HeatingA7W41 |
Rated Heting Capacity |
kw |
6.5 |
8.4 |
12.4 |
13.9 |
17.6 |
|
Input Power |
kw |
2.5 |
3.2 |
4.7 |
5.3 |
6.7 |
|
|
COP |
|
2.61 |
2.62 |
2.63 |
2.63 |
2.62 |
|
|
CoolingA35/W7 |
Rated Heting Capacity |
kw |
7.3 |
9.7 |
13.1 |
15.6 |
19.5 |
|
Input Power |
kw |
2.5 |
3.4 |
4.5 |
5.4 |
6.7 |
|
|
EER |
|
2.90 |
2.90 |
2.90 |
2.91 |
2.90 |
|
|
Hot WaterA20/W55 |
Rated Heting Capacity |
kw |
12 |
16 |
20 |
24 |
32 |
|
Input Power |
kw |
2.6 |
3.4 |
4.3 |
5.1 |
6.8 |
|
|
COP |
|
4.70 |
4.70 |
4.70 |
4.70 |
4.70 |
|
|
Max Current |
A |
18 |
23 |
28/14 |
32/18 |
20 |
|
|
Ambient Temperature Range |
°C |
-35-45 |
|||||
|
Rated Outlet Water Temperature |
°C |
55 |
|||||
|
Max Outlet Water Temperature |
°C |
60 |
|||||
|
ERP Level (35°C) |
|
A+++ |
A+++ |
A+++ |
A+++ |
A+++ |
|
|
ERP Level (55°C) |
|
A++ |
A++ |
A++ |
A++ |
A++ |
|
|
Circulating Water Flow |
m/h |
1.6 |
2.1 |
2.6 |
3.2 |
4.2 |
|
|
Inlet/Outlet Water Pipe Size |
|
DN32 |
DN32 |
DN32 |
DN32 |
DN32 |
|
|
Retngemt/Chargng |
kg |
R32/1.26 |
R32/1.68 |
R32/2 38 |
R32/2 73 |
R32/3.5 |
|
|
Compressor |
Brand |
GMCC |
Mitsubishi |
||||
|
Conderser |
High Eficiency Tube-in-shell Heat Exchanger / Plate Heat Exchanger |
||||||
|
Evaporator |
Finned Heat Exchanger |
||||||
|
Throttle Unit |
Sanhua Brand Electronic Expansion Valve |
||||||
|
Four-way Valve |
Sanhua Brand |
||||||
|
Controller |
LCD Wire Contraller |
||||||
|
Metel Plate |
Galvanized Steel |
||||||
|
Water Pump (Built-in) |
"AWMT" Brand DC Inverter Type |
||||||
DC Inverter Compressor
The compressor is the core of the heat pump, using variable-speed technology to modulate refrigerant flow between 20% and 100% capacity. This ensures stable indoor temperatures and reduces energy waste, with enhanced performance in cold conditions due to EVI technology.
Reversing Valve
The reversing valve allows the heat pump to switch between heating and cooling modes by changing the direction of refrigerant flow. It ensures smooth transitions and longevity, with modern EVI models featuring durable, solenoid-operated valves with fail-safe mechanisms.
Heat Exchangers (Indoor & Outdoor Coils)
Heat exchangers enable efficient thermal transfer, with indoor coils distributing conditioned air and outdoor coils absorbing or releasing heat. EVI systems optimize these coils with microchannel designs and corrosion-resistant coatings for improved heat transfer and reduced refrigerant charge.
Expansion Valve (Electronic Expansion Valve - EEV)
The expansion valve regulates refrigerant flow into the evaporator, creating a pressure drop for heat absorption. EEVs offer precise, real-time control, improving system efficiency and preventing issues like compressor flooding or overheating.
Vapor Injection Circuit (EVI)
EVI technology injects vapor into the compression process, boosting performance in cold weather. It enables reliable heating in temperatures as low as -25°C without requiring auxiliary heat.






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