Custom Industrial Cryogenic Freezer
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About Us
Zhejiang Heli Refrigeration Equipment Co., Ltd.
Zhejiang Heli Refrigeration Equipment Co., Ltd. is China Cryogenic Freezer -135℃ Manufacturer and Sale Cryogenic Freezer -135℃ Factory. As one of the early domestic players in ultra-low temperature refrigeration, Heli integrates R&D, manufacturing, sales, engineering, and after-sales services. The company employs 150 people, including nearly 50 in R&D and engineering, and operates a 25,000 m² facility with dedicated R&D, testing, and production lines. Driven by innovation and independent R&D, Heli has achieved over 60 technological breakthroughs and holds 40+ patents. It has also participated in key municipal science projects and contributed to national and industry standards. Heli’s product lines cover biomedical storage, lab instruments, aquatic deep-cold kitchen equipment, cold chain logistics, quick freezing systems, industrial environmental solutions, household refrigeration, and smart retail. Its solutions are widely used across biotech, research, marine, cold chain, healthcare, and consumer sectors.
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Factory Tour

Zhejiang Heli Refrigeration Equipment Co., Ltd. owns a 25,000-square-meter modern industrial park, featuring a scientific layout and comprehensive functions. The company has established a full-chain industrial system covering technological R&D to finished product inspection, which provides a solid guarantee for the high-quality production of ultra-low temperature refrigeration equipment.

Advantage
  • High quality raw materials
    High quality raw materials

    We use high-quality raw materials, which are reliable and durable in quality.

  • OEM/ODM
    OEM/ODM

    We have a professional R&D team that can design products according to different needs.

  • Rich experience
    Rich experience

    We have a professional technical team that can improve the process based on the different characteristics of the products to extend their service life.

  • Quality inspection
    Quality inspection

    The quality inspection room is equipped with advanced quality inspection devices. Before each refrigerator is dispatched, it needs to undergo various tests to ensure its stability and reliability.

PRODUCTION PROCESS
process
FAQ
  • Q. 1. What is a cryogenic medical refrigerator?

    A cryogenic medical refrigerator is a specialized refrigeration unit designed to preserve biological samples, vaccines, pharmaceutical products, and medical materials at ultra-low temperatures. These units ensure product stability, prevent degradation, and maintain the integrity of sensitive samples over long periods.

  • Q. 2. What temperature ranges do your refrigerators cover?

    Our product line includes models with various temperature capabilities:
    •Pharmaceutical refrigerators: +2°C to +8°C
    •Low-temperature freezers: down to –45°C or –60°C
    •Ultra-low temperature freezers: –86°C
    •Cryogenic freezers: as low as –150°C

  • Q. 3. What safety and quality certifications do your refrigerators have?

    Our products are manufactured in accordance with international standards and can be supplied with certifications such as FDA CE, ISO 13485, and ISO 9001. Each unit undergoes rigorous performance testing, quality inspection, and temperature calibration before delivery.

  • Q. 4. How do you ensure temperature accuracy and reliability?

    Each model is equipped with a high-precision digital temperature control system, real-time monitoring sensors, and audible/visual alarm functions to detect temperature deviations. Optional data logging and remote monitoring systems are available for enhanced safety and traceability.

  • Q. 5. Can the refrigerators be customized to meet specific requirements?

    Yes. We offer customization options for capacity, interior configuration, voltage, and monitoring systems. Custom branding, data interfaces, and alternative refrigerants (environmentally friendly options) can also be provided upon request.

  • Q. 6. Do you provide international shipping and after-sales service?

    Yes. We export globally and work with logistics partners experienced in handling precision laboratory equipment. Our technical team provides remote support, spare parts, and professional guidance for installation and maintenance.

  • Q. 7. What are the maintenance requirements for cryogenic refrigerators?

    Routine maintenance includes cleaning condenser filters, verifying temperature uniformity, and periodically checking door seals. Our after-sales team can provide maintenance guidelines and technical training for your staff to ensure optimal performance and longevity.

  • Q. 8. How can I choose the right model for my application?

    Our sales engineers will assist you in evaluating your storage requirements — such as temperature range, sample volume, installation space, and power configuration — to recommend the most suitable model for your application.

  • Q. 9. Do you work with distributors or OEM partners?

    Yes. We welcome collaboration with qualified distributors and OEM partners worldwide. We provide full technical support, marketing materials, and training to help our partners serve their markets effectively.

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News
Industry Knowledge Exhibition

Design of -135℃ Portable Industrial Cryogenic Freezer

The -135℃ portable industrial cryogenic freezer is a highly specialized piece of equipment designed to meet the stringent temperature requirements of industries that rely on ultra-low temperatures. This type of freezer is used in a variety of fields, including medical storage, biotechnology, and materials science, where precise and consistent cooling is essential. The design of a -135℃ portable industrial cryogenic freezer involves a combination of advanced engineering, high-performance insulation, and reliable refrigeration systems to ensure safe, efficient, and portable cold storage solutions. In this article, we will analyze the design aspects of the -135℃ portable industrial cryogenic freezer from multiple angles, focusing on key elements such as refrigeration technology, insulation, portability, safety features, and energy efficiency.

Refrigeration Technology

The core component of any -135℃ portable industrial cryogenic freezer is its refrigeration system. Achieving such low temperatures requires highly specialized refrigeration technology. For a -135℃ portable industrial cryogenic freezer, the commonly used refrigeration system is a cascade cooling system. This system utilizes multiple stages of compression and expansion to achieve the ultra-low temperatures needed.

In the stage, a refrigerant is compressed and cooled to a relatively lower temperature. In the second stage, a different refrigerant is used to bring the temperature down further. The cascade system allows for highly efficient cooling, ensuring that the freezer can maintain temperatures as low as -135℃ while the energy consumption typically associated with ultra-low temperature refrigeration.

Insulation

Insulation plays a pivotal role in maintaining the extremely low temperatures required by a -135℃ portable industrial cryogenic freezer. Since the temperature inside the freezer must remain constant, the insulation is designed to prevent external heat from infiltrating the unit. The insulation used in such freezers is typically composed of high-performance materials such as polyurethane foam, vacuum-insulated panels, and sometimes multi-layer insulation. These materials help to create an almost impenetrable barrier that minimizes the energy required to maintain ultra-low temperatures.

The design of the insulation system also considers factors such as thermal conductivity and resistance to compression. In a portable unit, the insulation must not only be highly effective but also durable enough to withstand movement and physical stress during transportation or use in different environments. As such, the -135℃ portable industrial cryogenic freezer incorporates high-density insulation that can endure frequent handling without degrading its thermal performance.

Additionally, modern insulation materials help reduce the freezer's energy consumption. The more effective the insulation, the less energy is required to maintain the internal temperature, which improves the overall efficiency of the system. Given that these freezers are often used in remote locations or in mobile settings, energy efficiency is a key consideration in their design.

Portability

One of the defining features of the -135℃ portable industrial cryogenic freezer is its portability. Unlike traditional cryogenic freezers that are fixed in one location, the portable design allows for flexibility in how and where the freezer can be used. Portability is achieved through a combination of lightweight materials and compact design. These freezers are often equipped with sturdy wheels, handles, or lifting mechanisms to facilitate transport in industrial settings.

While portability is important, it is essential that the freezer does not sacrifice performance for ease of mobility. A -135℃ portable industrial cryogenic freezer is designed to remain stable during transport and use, ensuring that the temperature inside the unit stays consistent. To achieve this, advanced sealing and shock-absorbing features are incorporated into the freezer's design. These features help prevent any disruption in cooling performance due to external vibrations or sudden movements.

Additionally, the compact design of portable cryogenic freezers means that they can be used in a wide range of settings, including research labs, medical facilities, and industrial sites. Their small footprint and mobility make them ideal for applications that require rapid relocation or use in tight spaces.

Safety Features

Given the temperatures involved, safety is a major consideration in the design of the -135℃ portable industrial cryogenic freezer. Safety features are integrated throughout the system to ensure that the freezer operates reliably and that users are protected from the risks associated with handling ultra-low temperatures.

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