Best Process for IQF Cherries: -35°C Fluidized Bed Freezing for 8 Minutes with Thawing Drip Loss ≤6%
The optimal large-scale IQF processing parameters for cherries in the Yurnfreeze Fluidized Bed Freezer are as follows: the recommended freezing temperature is approximately -35°C, with a conveyor belt speed of 0.3–0.5 m/min and a freezing time of approximately 6–10 minutes (slightly longer for larger cherries and shorter for smaller ones). Under optimized processing conditions, thawing drip loss can typically be controlled within 5%–8%, while the fruit integrity rate can generally reach 98%–99%, significantly reducing sticking, clumping, and browning.
The 3 Most Critical Challenges in IQF Cherry Production:
1. Excessive Thawing Drip Loss and Softened Fruit Texture
During slow freezing, large ice crystals are easily formed, causing severe damage to the cellular structure of the cherries. As a result, thawing drip loss often reaches double-digit levels (typically 15%–25%), while the fruit flesh becomes soft and mushy, making it suitable only for jam or puree processing.
2. Product Sticking and Clumping
When conventional tunnel freezers are used for fruit processing, insufficient freezing performance can easily cause large-scale sticking and clumping of cherries. This often requires additional manual separation and sorting, potentially resulting in more than 10% extra product loss and significantly higher labor costs.
3. Flavor and Color Loss
Prolonged slow freezing accelerates the loss of flavor, color, and nutrients such as anthocyanins and vitamin C. In contrast, Yurnfreeze IQF technology minimizes these losses to the greatest extent possible, helping preserve the cherries’ natural taste, appearance, and nutritional value.
Yurnfreeze Fluidized Bed Freezer Solves Every Major Challenge in Cherry Freezing
1. 8-Minute Ultra-Fast Freshness Locking, Fundamentally Solving Drip Loss and Fruit Cracking
The Yurnfreeze fluidized bed IQF freezer adopts a high-velocity cold air suspension freezing system, allowing cherries to remain in a fluidized state within the airflow and achieve uniform 360° freezing. Within just a few minutes, the core temperature of the cherries can be rapidly reduced from approximately 10°C to -18°C, dramatically shortening the traditional freezing time of 30–60 minute and significantly minimizing cellular damage caused by ice crystal formation.
- Thawing Drip Loss: Typically controlled within 5%–8% (depending on cherry variety and processing conditions)
- Fruit Integrity Rate: Generally reaches 98%–99% (depending on raw material selection and processing conditions)
2. Individually Fluidized Freezing to Effectively Reduce Sticking and Manual Sorting
The equipment is equipped with a vibrating distribution system and a multi-layer conveyor belt structure, allowing the cherries to remain almost completely separated during freezing for excellent individual quick-freezing performance. After discharge, product sticking and clumping are significantly reduced, typically eliminating the need for additional breaking apart or manual sorting.
- Significantly Reduces Labor Requirements
- Product Loss Rate Reduced to Below 2%
- Finished Product Yield Increased to Above 98%
3. Fully Customized Cherry Processing Line Solutions
Yurnfreeze provides complete cherry processing solutions from raw material intake to finished product storage, with customized configurations available to meet different production capacity requirements:
- Small-Scale Production Line: 500 kg/hour, suitable for small processing plants.
- Medium-Scale Production Line:1,000–2,000 kg/hour, suitable for medium-sized food processing companies.
- Large-Scale Production Line:3,000–5,000 kg/hour, suitable for large fruit and vegetable processing and export enterprises.
All production lines can be custom-designed according to the customer’s factory layout, processing requirements, and budget, with one-stop services including installation, commissioning, and technical support.
Standard Yurnfreeze Cherry IQF Production Line Configuration (According to Actual Processing Sequence)
1. Manual picking table：Preliminary removal of rotten fruit, damaged fruit, and foreign impurities
2. Lifting bubble cleaning machine：High-pressure bubble tumbling washing system for removing surface dirt, sand, and pesticide residues
3. Cherry destemmer：Fully automatic destemming without damaging the fruit flesh, with a destemming rate of over 99%
4. Cherry pit remover：Precision cherry pitting with less than 3% flesh loss while maintaining the whole fruit shape
5. Water cooler immersion cleaning tank：Secondary washing and pre-cooling process that reduces the cherry core temperature to below 10°C, improving IQF freezing efficiency
6. Air drying machine：Removes surface free water to prevent ice coating and product sticking during IQF freezing
7. Fluidized Bed Freezer：6–10 Minutes of Rapid Individual Quick Freezing (IQF)
8、Vibrating Discharge Conveyor + Finished Product Belt Conveyor
9、Fully Automatic Weighing & Packaging Machine + Metal Detector
10、Finished Product Conveyor to Cold Storage
Reference Parameters:A 1,000 kg/hour cherry IQF production line typically requires a total installed power of approximately 125 kW and occupies an area of around 85 m². With a high level of automation, the entire line can normally be operated by only 3–5 workers, including sorting, destemming, packaging, and other processing operations.
Top 3 Questions Frequently Asked by Customers
1. Q: What pre-treatment is required before IQF freezing cherries?
A: Only rotten or damaged cherries need to be removed at the manual sorting table before processing. The Yurnfreeze production line is equipped with fully automatic destemming, pitting, washing, and air-drying systems, eliminating the need for additional manual handling.
2. Q: Do different cherry varieties require different IQF processing parameters?
A: The overall processing parameters are basically the same, with only minor adjustments required for the conveyor belt speed of the Fluidized Bed Freezer. For larger cherry varieties such as Meizao and Hongdeng, the conveyor belt speed is typically set at 0.3–0.4 m/min with a freezing time of 8–10 minutes. For smaller varieties such as Huangmi and Lapins, the belt speed is generally adjusted to 0.4–0.5 m/min with a freezing time of 6–8 minutes.
3. Q: How long can IQF cherries be stored?
A: Under constant storage conditions at -18°C, cherries processed by the Yurnfreeze Fluidized Bed Freezer can typically be stored for 12–24 months while maintaining their original color, texture, and nutritional value with minimal change.
Contact Us
If you are planning to build a cherry IQF production line or upgrade your existing freezing equipment, feel free to contact Yurnfreeze for customized processing solutions and equipment quotations.