Built-in Cooler for Smart Refrigeration


HomeValet-Walmart SmartBox
HomeValet-Walmart SmartBox

Project: Portable Cooler/Refrigerator
Cooling Approach: Compressor Direct Cooling
Demand: HomeValet requires a secure, temperature-controlled smart box for efficient home grocery deliveries, meeting the demand for freshness and convenience. RIGID provides a compact, silent cooling module powered by a 110V outlet, ensuring efficient cooling for multiple temperature zones within the smart box. This solution enhances the HomeValet system’s capabilities, enabling it to maintain the freshness of frozen, refrigerated, and pantry items while withstanding outdoor conditions and offering seamless integration with delivery services like Walmart InHome.
Recommended products: Custom Cooling System (110V/60Hz)


RIGID, a technical firm specializing in compact cooling solutions, provides not only standard miniature cooling units but also customized services tailored to meet the unique needs of our clients.

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Compact Liquid Chiller - RIGID HVAC


The market for home grocery delivery is experiencing rapid growth, fueled by consumer demand for convenience and safety, especially during the COVID-19 pandemic. With competitors like Amazon, Kroger, and Costco intensifying their efforts, innovation is crucial to stay ahead. HomeValet, recognizing the importance of secure and temperature-controlled deliveries, sought a solution to meet the evolving consumer needs. Enter the Smart Box—a cutting-edge delivery receptacle with separate compartments for freezer, refrigerator, and pantry items. HomeValet required a reliable cooling system to maintain optimal temperatures within the Smart Box, ensuring the freshness and safety of delivered goods.

RIGID, a technical firm specializing in compact cooling solutions, stepped in to meet HomeValet’s needs. Leveraging its expertise, RIGID developed a custom cooling unit tailored specifically for the Smart Box. This cooling module, powered by a standard 110V outlet, efficiently regulates temperatures across multiple zones within the Smart Box. Its compact size and silent operation make it an ideal fit for the Smart Box’s design, while its high efficiency ensures minimal energy consumption. Moreover, RIGID offers customized services to accommodate HomeValet’s unique requirements, demonstrating their commitment to delivering innovative solutions.

In a market where reliability and innovation are paramount, the collaboration between HomeValet and RIGID represents a strategic partnership to set new standards for home delivery excellence. By addressing the need for secure, temperature-controlled deliveries, HomeValet’s Smart Box, powered by RIGID’s custom cooling unit, not only meets but exceeds consumer expectations, positioning both companies at the forefront of the burgeoning home delivery market.

What is the Smart Box?

The Smart Box is a cutting-edge, temperature-controlled delivery solution offered by HomeValet. It comprises an internet-connected receptacle with separate compartments for freezer, refrigerator, and pantry items. Users can remotely control, monitor, lock, and unlock the Smart Box via the HomeValet app, ensuring secure and convenient deliveries. Equipped with a backup battery for up to 36 hours of cooling, it conserves energy when not in use and adapts to various delivery needs. With automated features like lid detection and security camera activation, the Smart Box enhances the safety and freshness of home deliveries, setting a new standard for convenience and reliability.

  • Contactless Delivery
  • Secure, Safe, Durable
  • UV-C Light Disinfects Deliveries
  • Cold-Chain Compliant For Perishables
  • Consumer Owned, Consumer-Centric
  • Cold Air Temp (℉),72° 40° 0° Multiple Configurations
Smart Box-980x648
Smart Box-built-in cooling unit-RIGID – 980 x 648

Smart Box-built-in cooling unit-RIGID



Refrigeration Unit

The DC / AC Refrigeration Unit allows the end user to use a refrigerant that directly cools the desired payload via a cold plate or evaporator.


  • 12V /24V /48V DC & 110v~220V AC
  • R134a / R290 / R600a Refrigerant
  • Adopts hermetic rotary compressor
  • Capacity: 100~550W (360~1,880Btu)
  • Temperature Range: ±20℃ (-4~68℉)
  • Features: Small, reliable, efficient, and affordable cost.
Refrigeration Cooling Unit - RIGID
Refrigeration Cooling Unit – RIGID

DC Condensing Unit drawing


How Does RIGID Refrigeration Unit Work?

RIGID’s compact cooling unit, integrated into the Smart Box, operates by utilizing advanced temperature regulation technology to supply three different temperatures for the separate compartments within the Smart Box. Each compartment—dedicated to the freezer, refrigerator, and pantry items—receives customized cooling from the unit.

The cooling system employs a combination of sensors, thermostats, and actuators to monitor and adjust temperatures in real time, ensuring precise control over each zone. By modulating the compressor’s speed and adjusting the refrigerant flow, the cooling unit can maintain optimal temperatures within each compartment independently.

Furthermore, the compact design of RIGID’s cooling unit allows for efficient use of space within the Smart Box while ensuring silent operation and minimal energy consumption. This enables the Smart Box to provide reliable and consistent cooling performance, preserving the freshness and safety of a variety of perishable goods.




Features and Benefits

RIGID’s refrigeration systems offer several key features and advantages:

  1. Compact Design: RIGID’s systems are designed to be compact, making them ideal for applications where space is limited or where a smaller footprint is desired.
  2. High Efficiency: The refrigeration systems are highly efficient, providing effective cooling while minimizing energy consumption. This not only reduces operating costs but also contributes to environmental sustainability.
  3. Quiet Operation: Engineered for quiet operation, ensuring minimal noise levels even in noise-sensitive environments.
  4. Customizable Solutions: We offer customizable solutions to meet the specific needs of different applications. This flexibility allows for tailored cooling solutions that can adapt to various requirements.
  5. Reliable Performance: RIGID’s refrigeration systems are known for their reliability and durability, providing consistent performance even in challenging conditions.
  6. Easy Installation and Maintenance: Designed for easy installation and maintenance, reducing downtime and ensuring hassle-free operation.
  7. Environmentally Friendly: Environmental sustainability and offers refrigeration systems that use eco-friendly refrigerants and materials.
RIGID Micro Chillers: Revolutionizing Thermal Management
RIGID Micro Chillers: Revolutionizing Thermal Management

Customized & Design

At RIGID, we go beyond standard products to offer tailored solutions that meet the unique needs of our customers.

Our team of experts collaborates closely with clients to understand their specific applications and demands, crafting customized designs and services to address their challenges effectively.

Whether modifying existing products or developing entirely new solutions from scratch, we are dedicated to delivering innovative and reliable thermal management solutions that exceed expectations and drive success in every project. Feel free to contact the engineer!

Design process - RIGID

RIGID Technology

HomeValet and RIGID teamed up to make the Smart Box delivery system even better. RIGID is good at making small, efficient cooling systems. They made a special cooling unit just for HomeValet, so the Smart Box can keep different foods at just the right temperature. RIGID’s cool because they can make custom cooling stuff that works great, making deliveries safer and tastier!

Looking ahead, we are excited about the opportunities that this partnership will unlock. By leveraging our combined strengths and resources, we will continue to develop cutting-edge solutions that meet the evolving needs of our clients and drive industry-wide innovation.


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