Factory-directcold chainequipment.
Heat exchangers, active cold boxes and insulated containers, designed, built and tested in our own plant in Ningbo, China. Your drawing goes straight to our production line.
What we make
Finned Tube Heat Exchangers
Evaporator and condenser coils in copper tube and aluminum fin, built to your drawing.
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Liquid Cold Plates
Copper tube embedded in a 6061-T6 aluminum plate for cooling power electronics.
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LMS980 Mobile Cold Chain Box
980-litre active cold box, −25 °C to +10 °C, on mains, battery or vehicle power.
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12/24 V Car Fridges
Portable DC compressor fridges in a light EPP body, 20 L and 40 L.
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Insulated Fish Tubs
Rotomolded food-grade PE tubs with PU foam, twelve sizes from 300 to 1000 L.
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Rotomolded Cooler Boxes
PU-insulated cooler boxes for fresh food and catering, 25 to 120 L.
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Biological Sample Transport Box
50-litre insulated box for carrying packaged clinical and laboratory samples.
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FRP Medical Cold Boxes
Fiber-reinforced plastic boxes with a stainless steel liner and PCM plates.
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EPP Folding Insulated Boxes
Light insulated boxes that fold flat for the return trip. Three sizes.
View product65-second film from our production floor
From copper tube
to finished coil
Every stage is filmed on our own floor, with our own people. Nothing is staged.
- 01Tube bending
- 02Fin stamping
- 03Fin insertion
- 04Tube expansion
- 05Cleaning and drying
- 06Coil bending
- 07Brazing
- 08Leak testing
- 09Final inspection
- 10Packing
- 11Ready to ship
Fin stamping
Press lines stamp aluminum fin stock into fins with the pitch and collar height each coil needs.
Tube bending and insertion
Copper tube is bent into hairpins and laced through the fin stack.
Tube expansion
Mechanical expansion locks tubes and fins together for good thermal contact.
Brazing and leak testing
Circuits are closed by brazing, then every coil is tested at 3.8 MPa.
Rotational molding
Double-wall polyethylene bodies for cold boxes and fish tubs are molded here.
Refrigeration unit assembly
Compressor units and finished cold boxes are assembled and wired on dedicated lines.
The plant
No. 19 Xinqiao 3rd Road, Jiangbei District, Ningbo, Zhejiang, China
Heat exchangers, refrigeration units and rotomolded boxes are made on one site of 12,000 m². Engineering, production and testing are a short walk apart, so a question from your side reaches the person at the machine the same day.
- 01Fin stamping, tube bending, expansion, brazing and leak testing in-house
- 02Rotational molding workshop for cold boxes and fish tubs
- 03Assembly lines for refrigeration units
- 04Testing laboratory on site
Visit us, or tour by video call.
Buyers are welcome to audit the plant in person, or to join a live video walk through the production floor.
Book a factory visit
Tested before
it ships
We publish what we measured. The figures below come from our own leak test stations and data loggers.
Third-party safety test: Intertek, IEC/EN 60335-2-24, model LMS22-850W.
Certifications and test dataSix steps to
your own product
- 01
Inquiry
Send a drawing, a sample or a list of requirements.
- 02
Engineering
Our engineers review the design and we send a quotation.
- 03
Sampling
We build a sample for your approval.
- 04
Production
Series production starts after the sample is approved.
- 05
Inspection
Leak, function and appearance checks, with records.
- 06
Shipping
Export packing and dispatch from Ningbo.
Questions buyers ask
Is Lemosun a manufacturer or a trading company?
Lemosun is a manufacturer. Our plant in Jiangbei District, Ningbo, covers 12,000 m² and employs 105 people. Fin stamping, tube bending, brazing, leak testing, rotational molding and refrigeration unit assembly are all done in our own workshops.
What does Lemosun make?
Copper tube aluminum fin heat exchangers, tube-embedded liquid cold plates, the LMS980 mobile cold chain box, 12/24 V compressor car fridges, insulated fish tubs, rotomolded cooler boxes, biological sample transport boxes, FRP medical cold boxes and EPP folding insulated boxes.
Which refrigerant do your active cooling products use?
R513A. It is a non-flammable (ASHRAE A1) blend of R1234yf and R134a with zero ozone depletion potential and a global warming potential of 631 (IPCC AR4), less than half that of R134a.
Can you manufacture to our drawing or under our brand?
Yes. Heat exchangers and cold plates are normally made to customer drawings. Boxes and fridges can carry your color, logo and nameplate.
How are products tested?
Every heat exchanger coil is leak-tested at 3.8 MPa. Active cold boxes are run in our laboratory with data loggers, and we publish the measured pull-down record on our certifications and testing page.
Where is the factory, and can we visit?
No. 19 Xinqiao 3rd Road, Jiangbei District, Ningbo, Zhejiang, China. Buyers are welcome to visit, or to join a live video call from the production floor.
How do I get a quotation?
Email salesmanager@lemosun.com or message us on WhatsApp at +86 135 8655 4282. Include the product, the quantity and a drawing or specification if you have one.
Get a factory price.
Send your drawing or requirements. A sales engineer will reply by email.