Tiejun Y.
Turn Your Idea into a Manufacturable Product | HVAC Structure Design | Prototype to Production Need
Foshan,
China
Global rank:
3,305
/
132,420
Skill pts: 11
3D Modeling & Product Design
Design for Manufacturing (DFM
Mold Design
Plastic Injection Molding Design
PTC CREO 24
About
Senior Mechanical Design Expert | 24 Years HVAC / Heat Pump / Industrial Heat Pump Experience
Turn your HVAC or heat pump product from concept to mass production — efficiently, reliably, and certification-ready.
I have over 24 years of experience in mechanical structure design and product development in HVAC, heat pumps, and smart appliances. I have successfully led 200+ products from concept to mass production.
My products are widely exported to Europe and North America, fully compliant with CE, UL, Keymark, TÜV, DVGW, UBA, KTW and other international standards, with strong experience in certification-oriented design.
My Background
Top-Tier Industry Experience:
Worked at leading companies with mature product development systems:
- Midea Group (Fortune Global 500)
- A leading listed heat pump company
- Chigo Air Conditioning (00449.HK)
International Client Experience:
Extensive experience working with global clients, providing customized product development:
Carrier / Iceair / Thermondo / Kaisai / Olimpia / Notus / SKD
Patents:
- 1 National Priority Invention Patent
- 12 Invention Patents
- 100+ Utility Model Patents
Core Expertise
1. HVAC / Heat Pump Structural Design
- Full unit structure design (indoor / outdoor / integrated units)
- Refrigeration system integration (compressor, heat exchangers, piping layout)
- Noise reduction optimization (airflow vs noise balance)
- Waterproofing, anti-vibration, piping stress & reliability design
- Electrical enclosure safety & system integration
2. Industrial Heat Pump & HVAC Design
- Industrial-grade heat pump system design
- Industrial HVAC equipment (high reliability / long lifespan / harsh environments)
- Custom non-standard equipment structure design
3. Manufacturing-Oriented Engineering (DFM / DFA)
- Design for Manufacturing (DFM)
- Design for Assembly (DFA)
- Cost optimization
- Mold feasibility analysis (plastic / sheet metal)
Service Scope
Heat Pump Products:
Residential heat pumps (Monoblock / Split), modular systems, integrated water systems / hydraulic modules
Air Conditioning & Light Commercial HVAC:
Indoor / outdoor unit structure design, PTAC / window AC / portable AC, heat exchanger design (evaporator / condenser), electrical cabinet design
Industrial & Custom Equipment:
Industrial air conditioning, custom equipment structure design
Additional Design Services:
Sheet metal design, plastic part design, HVAC piping optimization, product upgrade & partial redesign
Mold & Manufacturing Support:
Mold design review (DFM), injection molding / sheet metal process optimization, supplier sourcing & factory coordination
Cross-Functional Collaboration:
Work with thermal engineers (refrigeration system optimization), work with electrical engineers (control system integration), support full system-level product development
China-Based Engineering Support:
Reliable supplier sourcing, on-site or remote production support, fast issue resolution during prototyping and mass production
What I Need From You (Before Starting)
To ensure an efficient project process, please provide as much as possible:
1. Basic Product Information:
- System diagram / schematic
- Sketch / concept / idea
- Reference images or benchmark products
2. Certification & Market Requirements:
- Target certifications (CE / UL / Keymark / TÜV, etc.)
- Target market (Europe / North America, etc.)
3. Production Information:
- Target production volume (prototype / small batch / mass production)
- Whether you already have a factory or supply chain
4. Design & Manufacturing Preferences:
- Material preference (plastic / sheet metal / hybrid)
- Special requirements (cost target / appearance / size constraints, etc.)
Even if you only have a rough idea or simple sketch, feel free to contact me. I can help you refine the concept and bring your product to life.
My Commitment
✔ On-time delivery
✔ Design compliant with international standards (CE / UL, etc.)
✔ Production-ready, manufacturable design
✔ Free initial technical consultation
✔ Reliable and efficient communication
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Turn your HVAC or heat pump product from concept to mass production — efficiently, reliably, and certification-ready.
I have over 24 years of experience in mechanical structure design and product development in HVAC, heat pumps, and smart appliances. I have successfully led 200+ products from concept to mass production.
My products are widely exported to Europe and North America, fully compliant with CE, UL, Keymark, TÜV, DVGW, UBA, KTW and other international standards, with strong experience in certification-oriented design.
My Background
Top-Tier Industry Experience:
Worked at leading companies with mature product development systems:
- Midea Group (Fortune Global 500)
- A leading listed heat pump company
- Chigo Air Conditioning (00449.HK)
International Client Experience:
Extensive experience working with global clients, providing customized product development:
Carrier / Iceair / Thermondo / Kaisai / Olimpia / Notus / SKD
Patents:
- 1 National Priority Invention Patent
- 12 Invention Patents
- 100+ Utility Model Patents
Core Expertise
1. HVAC / Heat Pump Structural Design
- Full unit structure design (indoor / outdoor / integrated units)
- Refrigeration system integration (compressor, heat exchangers, piping layout)
- Noise reduction optimization (airflow vs noise balance)
- Waterproofing, anti-vibration, piping stress & reliability design
- Electrical enclosure safety & system integration
2. Industrial Heat Pump & HVAC Design
- Industrial-grade heat pump system design
- Industrial HVAC equipment (high reliability / long lifespan / harsh environments)
- Custom non-standard equipment structure design
3. Manufacturing-Oriented Engineering (DFM / DFA)
- Design for Manufacturing (DFM)
- Design for Assembly (DFA)
- Cost optimization
- Mold feasibility analysis (plastic / sheet metal)
Service Scope
Heat Pump Products:
Residential heat pumps (Monoblock / Split), modular systems, integrated water systems / hydraulic modules
Air Conditioning & Light Commercial HVAC:
Indoor / outdoor unit structure design, PTAC / window AC / portable AC, heat exchanger design (evaporator / condenser), electrical cabinet design
Industrial & Custom Equipment:
Industrial air conditioning, custom equipment structure design
Additional Design Services:
Sheet metal design, plastic part design, HVAC piping optimization, product upgrade & partial redesign
Mold & Manufacturing Support:
Mold design review (DFM), injection molding / sheet metal process optimization, supplier sourcing & factory coordination
Cross-Functional Collaboration:
Work with thermal engineers (refrigeration system optimization), work with electrical engineers (control system integration), support full system-level product development
China-Based Engineering Support:
Reliable supplier sourcing, on-site or remote production support, fast issue resolution during prototyping and mass production
What I Need From You (Before Starting)
To ensure an efficient project process, please provide as much as possible:
1. Basic Product Information:
- System diagram / schematic
- Sketch / concept / idea
- Reference images or benchmark products
2. Certification & Market Requirements:
- Target certifications (CE / UL / Keymark / TÜV, etc.)
- Target market (Europe / North America, etc.)
3. Production Information:
- Target production volume (prototype / small batch / mass production)
- Whether you already have a factory or supply chain
4. Design & Manufacturing Preferences:
- Material preference (plastic / sheet metal / hybrid)
- Special requirements (cost target / appearance / size constraints, etc.)
Even if you only have a rough idea or simple sketch, feel free to contact me. I can help you refine the concept and bring your product to life.
My Commitment
✔ On-time delivery
✔ Design compliant with international standards (CE / UL, etc.)
✔ Production-ready, manufacturable design
✔ Free initial technical consultation
✔ Reliable and efficient communication
Service offers
Experience
-
Structural Lead
a leading listed heat pump company · Full-time
Jun 2019 –
Present
6 yrs 11 mos
Foshan, Guangdong Province, China
Products Responsible For:
- Closed-loop Heat Pump Sludge Dryer
- European Commercial Heat Pumps
- Residential Heat Pumps
Key Achievements:
- National-level solid waste project: Completed structural design for a 28-ton/day sludge treatment project
- Modular design breakthrough: Achieved modular design for closed-loop heat pump sludge dryers, solving high-cost and long-lead-time issues of custom non-standard projects
- High efficiency & low noise: Developed residential heat pump series for European market, delivering high energy efficiency and low noise operation
- German DVGW certification: Designed highly integrated water system that passed German DVGW certification, improving heat pump installation efficiency by 50% -
Senior Engineer
Midea Group Co., Ltd. (Stock Code: 000333.SZ) · Full-time
Jun 2015 –
Jun 2019
4 yrs
Foshan, Guangdong Province, China
Key Achievements:
R32 High-Efficiency & Low-Noise Platform (5kW, 7kW, 10kW, 12kW, 16kW) – Led the R&D of this series platform, completed the new chassis architecture, achieving high energy efficiency and low noise performance. Involved approximately $1.5M USD in mold/tooling investment.
European Hydraulic Module Box (2 Models) – Developed the European hydraulic module box, significantly improving the installation efficiency of heat pump products. -
Engineer → Senior Engineer → Structural Lead
Chigo Air Conditioning Co., Ltd. (Stock Code: 00449.HK) · Full-time
Mar 2006 –
Jun 2015
9 yrs 3 mos
Foshan, Guangdong Province, China
Career Progression:
Structural Lead – Smart Air Conditioning R&D (4 years)
Senior Engineer – Light Commercial Products (3 years)
Engineer – Portable Air Conditioners (2 years)
Key Achievements:
World's First Cloud Air Conditioner – As Structural Lead, completed the development of the world's first cloud-connected smart air conditioner (IoT-enabled), a pioneering product in the industry.
Product Portfolio Coverage – Led structural design across three major product categories:
Portable Air Conditioners (2 years) – Engineer role
Light Commercial Products (3 years) – PTAC, Ceiling, Ducted Air Conditioners, Fan Coil Units as Senior Engineer
Smart Air Conditioning R&D (4 years) – As Structural Lead, driving IoT integration and intelligent control systems - Mold Engineer Guangdong Kezhi Mould Co., Ltd. · Full-time Sep 2002 – Jul 2006 3 yrs 10 mos Foshan, Guangdong Province, China Responsibilities: Developed plastic injection molds for air conditioning products.
Other experience
-
280 Tons/Day Large Heat Pump Sludge Drying System
Role: Structure Lead & Principal Design Engineer.
Description: National cement kiln waste treatment project. Designed 48 modules with automatic dust removal, ash cleaning, and self‑cleaning systems. Over 100,000 parts; modular design enabled assembly line production.
Key outcomes: 12 days shorter production cycle; cost reduced by 850,000 RMB; highly recognized by company leadership. -
45kW R290 Commercial Modular Heat Pump (Europe)
Role: Project Lead & Structure Principal Designer.
Description: Company’s first R290 commercial heat pump. Developed innovative refrigerant leakage protection, liquid‑cooled electrical control, and screw‑less exterior design. High container packing density reduces logistics cost.
Key outcomes: 12 personal patents; CE & TUV certified; ready for mass production. -
High-Integration Water System for German Homes
Role: Product Manager & Structure Lead.
Description: Designed a compact water system (60% volume reduction) with quick‑connect technology – installation time reduced by 40%. Achieved DVGW water certification (European highest standard). Improved energy efficiency by 15%.
Key outcomes: Modular design, front‑access maintenance (60% less repair work), remote APP control. -
R290 Ultra-Quiet & High-Efficiency Heat Pump Series (Europe)
Role: Project Lead & Principal Structure Designer.
Description:
Developed a new generation of R290 heat pump series for European family heating, hot water, and pool heating. Achieved noise level ≤43dB . Designed multiple safety protection systems against refrigerant leakage, passing EN60335 and TUV certification.
Key outcomes:
12 patents; mass production; first year sales covered Germany, France, and Nordic markets. - PTAC product line Role: Project Lead & Principal Structure Designer. Description:Developed PTAC product line for US market (12 cores, 50+ series). Collaborated with Carrier, IceAir. Reduced costs by 5-10% for multiple product lines. Achieved 20%+ annual sales growth.
-
Cloud Smart Air Conditioner
Role: Principal Structure Designer.
Description:Developed world's first cloud smart air conditioner (1/3 of company sales). Led JD Cloud, AliCloud smart AC projects. Managed 50+ large projects and 300+ product extensions. Awarded China Excellent Patent and multiple innovation awards.
Guangdong Chigo Air Conditioning Co., Ltd.（Hong Kong-listed company）
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Joined: April 4, 2026
Last seen: May 4, 2026
Area of Expertise
3D Modeling
Industrial Design Services
Concept Design
Engineering Design
Mechanical Engineering
Electronic Devices
3D Design Services
HVAC Design Services
3D Solid Modeling
3D Models of Machine Parts
Design Engineering Services
Assembly Modeling Services
Prototype Design Engineering
Creo Design Services
3D Product Demo
3D Product Modeling
Product Engineering Services
2D to 3D Modeling
Design for Assembly Services
Mechanical Drawing Services
Languages
English Professional working proficiency
Chinese (Traditional) Native or bilingual proficiency
German Limited working proficiency
Location
Foshan, China