Industrial Cascade Heat Pump with VFD & Easy Maintenance ASHP

Product Description

Sujing Industrial Cascade Heat Pump with VFD & Easy Maintenance ASHP
updated in 2026-06-01

As one of China's earliest professional manufacturers of purification air conditioners and HVAC equipment, Sujing specializes in R&D, production, sales, and installation. We operate two core segments: air conditioning systems and heat pump systems. The heat pump line includes CO2 heat pumps, cascade variable frequency units, air source (chilled water) units, water-cooled chillers, industrial screw units, air-cooled modules, and drying units.

Our products are widely applied in industry, agriculture, commerce, transportation, and aerospace, as well as in specialized fields like green heating, coal mines, oil fields, livestock farming, agricultural drying, and biomedicine. They are exported to over 30 countries, including the U.S., Finland, the Netherlands, Canada, and Brazil.

Product Description

 

Ultra-low Ambient Temp VFD Cascade High Temp Heat Pump Unit

The air source cascade heat pump couples two independent refrigeration cycles through an intermediate heat exchanger, enabling step-by-step heat transfer. This design overcomes the limitations of single-stage systems under low ambient temperature and high water temperature conditions such as excessive compression ratio, high discharge temperature, and low volumetric efficiency. It ensures stable hot water output of up to 80°C (with R134a) or 95°C (with R515B) even in extremely cold climates as low as -35°C, offering wide applicability.

 

Operating Principle

The air source cascade heat pump is mainly composed of two independent systems: a low-temperature stage and a high-temperature stage. The evaporator of the low-temperature stage absorbs heat from the air and transfers it to the high-temperature stage via an intermediate evaporator-condenser. The high-temperature stage then exchanges this heat with the water medium through its condenser, thereby achieving high-temperature hot water or heating supply.

Product Parameters

Model			SJK-20G/IIBF-100
Rated heating conditions	Heating capacity	kW	38.3
	Water flow	m3/h	3.3
	Input power	kW	16.5
	COP	W/W	2.32
Rated high temp outlet water condition	Heating capacity	kW	33.1
	Water flow	m3/h	2.8
	Input power	kW	19.7
	COP	W/W	1.68
Nominal high temp water outlet condition	Heating capacity	kW	30.1
	Water flow	m3/h	2.6
	Input power	kW	21.1
	COP	W/W	1.42
Power		380V/3N~50Hz
Max.input power		kW	24
Max.input current		A	49
Ambient temperature		ºC	-35~43
Max. water outlet temperature		ºC	98
Refrigerant		R410A+R1234ze(E)
Compressor		High-efficiency flexible scroll compressor (R410A DC variable frequency/R1234ze(E) fixed frequency)
Air source heat exchanger		High-efficiency internally threaded copper tube fin heat exchanger
Water heat exchanger		Double pipes heat exchanger
Water system	Water pipe connection		DN40 (Internal thread)
	Water pressure drop	kPa	≤50
Dimensions(length * width * height)		mm	1700*1160*2050
Noise		dB(A)	≤62
Weight		kg	850

Remarks:

1) Rated heating conditions: dry bulb temperature 7°C, wet bulb temperature 6°C, water inlet temperature 60°C, water outlet
temperature 70°C.
2) Rated high temperature outlet conditions: dry bulb temperature 7°C wet bulb temperature 6°C, water inlet temperature 85°C,
water outlet temperature 95°C.
3) Nominal high temperature outlet conditions: dry bulb temperature -12°C, wet bulb temperature -13.5°C, water inlettemperature 85°C,water outlet temperature 95°C.
4) Specifications are subject to change with product improvements, please refer to the actual product.
5) Customization is available according to the customer's actual requirements.

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Company Profile

Jiangsu Sujing Group Co., Ltd

Dedicated to overall solutions for equipment manufacturing in the field of dehumidification and environmental protection.
History: Established in 1969, state-owned high-tech company  
Size: 130,000 square meters  
Employees: 1200+

Chiller Performance Testing Center

The testing center is equipped to evaluate both water chillers and water/ground source heat pumps, simulating year-round operating conditions. It supports single-unit testing up to 1200 kW, ensuring reliable performance validation under real-world scenarios.

100HP Environmental Simulation Laboratory

This state-of-the-art laboratory is equipped to test chillers & heaters, direct expansion units, combined air conditioning units, and fan coil units-with dedicated capabilities for explosion-proof equipment. It can simulate year-round operating conditions and supports single-unit testing up to 300 kW, ensuring comprehensive and reliable performance validation.

Environmental Simulation Enthalpy Difference Laboratory

This laboratory can simulate extreme environments with temperatures ranging from -30°C to 50°C. It tests dehumidifier performance under various climate conditions, while real-time monitoring of operating parameters is conducted through a central control room. This ensures a solid foundation for the stable and reliable operation of dehumidifiers.

Rotary Dehumidifier Testing Center

Equipped with advanced sensors, our testing center continuously monitors key operating parameters to accurately assess the dehumidifier's performance and operating status. Real-time test data can be accessed anytime via mobile devices, offering valuable insights for fault diagnosis and condition evaluation-driving smarter maintenance and continuous product optimization.

FAQ

1.Who we are?
Founded in 1970, we are a large-scale manufacturer specializing in HVAC equipment. Boasting decades of rich experience in R&D and production, we focus on heat pumps, industrial chillers, air conditioners and dehumidification systems. Supported by a professional technical team and robust research strength, we own 467 authorized patents and have formulated 48 national and industrial standards. We also possess large production bases and steady mass-production capacity to ensure reliable supply.

2.Quality Assurance
We have four national-level laboratories and a professional R&D team made up of many postdoctoral and graduate staff.
All products pass strict laboratory performance tests after R&D before official launch.
Before delivery, we also carry out simulated working condition tests internally, to ensure products meet industry standards and run steadily.

3.Our Main Products
Heat Pumps & Rotary Dehumidifiers & Water Chillers / Process Chillers & Industrial Air Handling Units.
 

4.Why Choose Us?
Strong R&D strength: We boast a skilled technical team with many postdoctoral and graduate professionals. Holding 467 patents, we ensure solid technical support and reliable product quality.
Rich product portfolio: We provide heat pumps, industrial air conditioners, dehumidifiers, chillers, and tailored HVAC system solutions.
Wide application coverage: Our products are widely used in new energy, electronic manufacturing, IT industry and various commercial & industrial fields.
 

5.Team Terms &  Support
A: Accepted Delivery Terms: FOB,,CIF,EXW;
Accepted Payment Currency: USD, EUR,CNY;
Accepted Payment Type: T/T,L/C
Language Spoken: English, Chinese;