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At CSTHEATEXCHANGER, we design and manufacture high-efficiency Under-Counter Cube Ice Maker Evaporators (Compact Grid & Inverted Spray Plates) engineered specifically for commercial under-counter ice machines, cocktail bars, coffee shops, hotel executive lounges, luxury residential suites, and compact restaurant kitchens (standard daily ice production capacities engineered from 25 kg/24h (55 lbs) to over 150 kg/24h (330 lbs) within compact ADA-compliant chassis envelopes). Engineered to fit low-profile height constraints (<800 mm machine height), our under-counter evaporators feature heavy-duty food-grade electrolytic nickel-plated copper or solid stainless steel grid cells permanently bonded to high-conductivity serpentine refrigeration tubes using high-temperature silver alloy brazing. Optimized for eco-friendly hydrocarbon refrigerants (such as R290) as well as standard HFC/HFO blends, CSTHEATEXCHANGER under-counter evaporators deliver fast batch freeze cycles (11 to 16 minutes), whisper-quiet hot-gas harvest release (40 to 70 seconds), and full compliance with NSF/ANSI Standard 12 and FDA food-contact hygiene standards, producing crystal-clear, slow-melting gourmet, dice, and half-dice ice cubes.
Under-counter ice machines operate in tight, enclosed spaces under bar tops or kitchen counters with limited airflow and restricted chassis height:
COMPACT UNDER-COUNTER CUBE ICE FORMATION & HARVESTING
[COMPACT UNDER-COUNTER CHASSIS: <800 mm HEIGHT ENVELOPE]
┌────────────────────────────────────────────────────────┐
│ INVERTED SPRAY NOZZLE GRID OR VERTICAL WATER CURTAIN │
├────────────────────────────────────────────────────────┤
│ [ICE CELL 1] [ICE CELL 2] [ICE CELL 3] [ICE 4] │ <-- Individual Precision
│ ▲ │ ▲ │ ▲ │ ▲ │ │ Molded Cells
│ │ ▼ │ ▼ │ ▼ │ ▼ │
│ Upward Spray Jets / Cascading Chilled Water (+2°C to +4°C)
│ Continuous wash action purges minerals; clear ice freezes
├────────────────────────────────────────────────────────┤
│ REAR SERPENTINE COPPER TUBING (Silver Brazed Bond) │ <-- Rapid Heat Removal
└────────────────────────────────────────────────────────┘ via R290 / R134aCSTHEATEXCHANGER manufactures evaporators for both major under-counter freezing architectures:
Vertical Grid Cascading Film: Water flows downward across vertical cells, producing dense dice and half-dice cubes with rapid harvest cycles.
Inverted Horizontal Spray Grid (Thimble / Gourmet Cups): Water jets spray upward into inverted individual copper cups, creating crystal-clear, gourmet cylindrical thimble ice preferred by high-end cocktail mixology bars.
Because under-counter machines feature built-in insulated storage bins located directly below the evaporator, heat leaking into the bin must be minimized. Our low-thermal-mass copper grid plates allow hot-gas defrost to release the ice slab in under 60 seconds, preventing ambient bin air warming and reducing ice meltback.
Under-counter ice machines experience intense duty cycles in hospitality venues. CSTHEATEXCHANGER eliminates common evaporator failure modes through robust engineering:
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CSTHEATEXCHANGER UNDER-COUNTER EVAPORATOR VS. GENERIC OEM PLATES
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Engineering Feature Generic Under-Counter EvaporatorCST Heavy-Duty Under-Counter Evaporator
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Tube-to-Grid Joint Metallurgy Soft Lead/Tin Solder / Thermal GlueHigh-Temperature Silver Alloy Brazing
Thermal Shock Cycle Life 20,000 - 40,000 Cycles (Cracks) > 120,000+ Cycles (Zero Delamination)
Plating Technology & Thickness Thin Decorative Nickel (5-10 µm)High-Density Electrolytic Hard Nickel (25-35 µm)
Peeling & Scaling Resistance Prone to Scaling & Pitting Mirror-Smooth, Resists Acid Cleaning
Food Contact Hygiene Compliance Often Non-Certified NSF/ANSI Standard 12 & FDA 21 CFR
Eco-Refrigerant Compatibility HFC Only Optimized for Natural R290 & R600a / HFOs
Acoustic & Vibration Profile Loud Clattering Defrost Sound Acoustically Dampened Silent Harvest
================================================================================ CSTHEATEXCHANGER® MULTI-LAYER COMPACT BONDING ARCHITECTURE
FOOD-CONTACT WATER / ICE SIDE
┌────────────────────────────────────────────────────────────────────────┐
│ HIGH-DENSITY ELECTROLYTIC HARD NICKEL PLATING (25 - 35 µm Non-Porous) │ <-- Food-Grade Safe
├────────────────────────────────────────────────────────────────────────┤
│ OXYGEN-FREE HIGH-CONDUCTIVITY COPPER BASE (C11000 / T2 Purity) │ <-- Max Thermal Transfer
├────────────────────────────────────────────────────────────────────────┤
│ HIGH-TEMPERATURE CONTINUOUS SILVER BRAZED INTERFACE (Zero Lead/Cadmium)│ <-- Immune to Thermal
├────────────────────────────────────────────────────────────────────────┤ Fatigue Cracking
│ REFRIGERANT TUBE BUNDLE (Engineered for Low Charge R290 Systems) │ <-- Micro-Pass Flow
└────────────────────────────────────────────────────────────────────────┘In under-counter machines, space constraints create intense localized thermal gradients during hot-gas harvest. Soft-soldered joints rapidly crack under thermal fatigue. CSTHEATEXCHANGER uses continuous silver brazing alloys, providing permanent metallurgical fusion that withstands >120,000 thermal shock cycles>120,000 thermal shock cycles without tube separation or loss of heat transfer.
Our grids undergo multi-stage electrolytic plating with mirror-smooth, pore-free hard nickel. This prevents mineral scale adhesion in hard-water bar environments, withstands routine citric acid descaling flushes, and eliminates toxic copper leaching into beverage ice.
Global environmental regulations (EU F-Gas, US EPA SNAP) mandate low-GWP natural refrigerants in self-contained commercial refrigeration:
R290 PROPANE THERMODYNAMIC CIRCUIT OPTIMIZATION
• Ultra-Low Charge Requirement: Engineered for < 150g R290 safety limits
• High Latent Heat of Vaporization: Cuts compressor displacement by ~15%
• Multi-Pass Balanced Circuiting: Eliminates refrigerant liquid slugging
• High Burst Pressure Rating: Tested to > 120 bar for high-pressure hot gas(Note: The following engineering parameters represent standard manufacturing design envelopes. Exact dimensions, cell counts, tube diameters, and mounting bracket configurations are customized to OEM under-counter chassis designs.)
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CSTHEATEXCHANGER UNDER-COUNTER CUBE ICE EVAPORATOR (CST-UCE SERIES)
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Engineering Parameter Standard Manufacturing & Design Range
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Daily Ice Production Range Typical: 25 kg/24h to 150+ kg/24h (55 lbs to 330 lbs/day)
Ice Cube Geometry Options Half-Dice (10x22x22 mm), Full-Dice (22x22x22 mm), Gourmet (Ø 28x32 mm)
Grid Cell Count Options 24, 32, 48, 60, 80, 120, 160 individual ice cube cells
Evaporating Temperature Range -12 °C to -22 °C (Freezing Cycle) | +15 °C to +25 °C (Harvest Cycle)
Refrigerant Compatibility Eco-Friendly R290 (Propane), R134a, R404A, R452A, R513A, R448A/R449A
Grid Base Material Oxygen-Free High-Conductivity Copper (T2 / C11000) or Food-Grade SS304
Plating Specification Heavy-Build Electrolytic Hard Nickel (25 µm to 35 µm Thickness)
Tube Bundle Metallurgy Seamless DHP Copper (ASTM B280 / EN 12735-1) with High Burst Rating
Bonding Technology High-Temperature Continuous Silver Alloy Brazing (Lead-Free / Cadmium-Free)
Operating Proof Pressure > 120 bar (1,740 psi) Test Pressure; Safe for Intense Hot-Gas Defrost
Leakage & Quality Verification 100% Helium Mass Spectrometer Vacuum Leak Testing (< 1x10⁻⁸ mbar·l/s)
Certifications & Standards NSF/ANSI Standard 12, FDA 21 CFR, CE, RoHS, ISO 9001
================================================================================Under-counter evaporators must fit inside compact height envelopes (<800 mm<800 mm total machine height) while operating above built-in storage bins. They require ultra-compact horizontal or low-profile vertical grid geometry, lower refrigerant charge volume (optimized for <150 g<150 g of R290R290 Propane), and rapid hot-gas harvest cycles (<60 seconds<60 seconds) to prevent warming the storage bin below.
Our evaporators undergo mirror-polishing followed by high-density, pore-free 25–35 μm25–35 μm electrolytic nickel plating. The ultra-smooth surface reduces mineral nucleation sites, allowing scale minerals to wash away during the continuous water cascade and resisting degradation from periodic citric acid descaling flushes.
Yes. We manufacture direct drop-in replacement evaporator plates matching the exact bolt patterns, tube connection stubs, thermistor wells, and bracket dimensions for all major international commercial under-counter ice machine brands, as well as developing new custom OEM evaporator cores from customer 3D CAD models.
Maximize daily ice yield, cut harvest cycle times, and guarantee food-grade ice safety in compact under-counter footprints with CSTHEATEXCHANGER:
Compact Under-Counter Cube Ice Evaporators (25 kg to 150 kg/24h)
Dice, Half-Dice, and Gourmet Cylindrical Ice Cell Configurations
Heavy-Build Electrolytic Hard Nickel Plating (25–35 μm) & Solid SS304
Permanent High-Temperature Silver Brazed Tube-to-Plate Construction
Optimized for Eco-Friendly R290 and Standard HFC/HFO Refrigerants
100%100% Helium Mass Spectrometer Leak Tested & NSF/FDA Food Safety Compliant
Contact our specialized commercial refrigeration engineering team today with your target daily ice capacity, ice cube dimensions, chassis envelope dimensions, and refrigerant preference for custom thermal selections, 2D/3D CAD models, and factory-direct quotation.
Website: https://www.cstheatexchanger.com/
Technical Inquiries: info@cstheatexchanger.com
