NingdeThermal Shock Test Machine

(1) Name and Model Number
1. Product Name: Thermal Shock Test Chamber
2. Product Model: TH8046C-80 (Water-Cooled/Air-Cooled)

(II) Overview
This instrument is custom-designed and manufactured to meet user requirements, and is suitable for high‑ and low‑temperature shock testing as well as storage and operational testing under elevated or reduced temperature conditions for complete systems and component parts in the aerospace, defense, marine, electrical, and electronic industries. It enables users to conduct accelerated environmental tests on entire systems (or components), electrical equipment, instruments, materials, coatings, platings, and other items, thereby facilitating evaluation of the test specimens and their performance under specified environmental conditions. The test chamber is delivered in fully assembled condition, with intact exterior appearance and a complete set of spare parts, ensuring long‑term stable operation. Its control system complies with MIL‑STD, GB, JIS, JEDEC, IEC, and other relevant testing standards, and meets the requirements of GB 2423.1‑89, GB 2423.2‑89, GB 2423.4‑89, GB/T 2423.3‑93, GB/T 2423‑93, and other applicable standards.

(3) Main Technical Parameters:
1. Temperature range of the high-temperature zone: +60°C to +200°C;
2. Temperature range in the low-temperature zone: -0°C to -65°C;
3. Impact temperature range: -50 °C to +150 °C;
4. Control accuracy: ±2°C;
5. Resolution: 0.01℃;
6. Heating time in the high-temperature zone: from ambient temperature to 150°C, less than 40 minutes;
7. Cooling time in the low-temperature zone: from ambient temperature to -65°C, less than 50 minutes;
8. Machine Structure and Materials:
A. Structure: It is divided into a high-temperature zone, a low-temperature zone, and a test zone.
B. Internal dimensions: 500 mm (W) × 400 mm (H) × 400 mm (D), 80 liters;
C. Inner and outer box material: SUS 304 heat- and cold-resistant stainless steel; Grade‑1 polished surface.
D. Insulation materials: high-density glass wool and high-strength PU foam insulation;
E. Anti-sweat mechanism: Utilizes the thermal energy of K-type tubing in the system for anti-sweat treatment;
F. Auxiliary equipment: Cold- and heat-resistant high‑tension packing, capable of withstanding temperatures up to 400°C.
Low temperature: −200°C; G. One set of automatic high–low temperature switching equipment;
H. Includes two adjustable movable plates.
9. Inner box configuration:
A. One lead-in hole (Φ50);
B. The height of the test area is adjustable and can support a load of 5 kg or more;
C. Built-in power supply: three-phase five-wire (AC 380 V, 50 Hz), capable of handling a current of 18 A, with a voltage range of 350–400 V.
 

(4) Working Principle and Structure
Performance Metrics:
1) Temperature shock range: -50℃ to 150℃
2) Temperature fluctuation: Both the high-temperature chamber and the low-temperature chamber are ≤ ±2°C.
3) Temperature fluctuation: ≤±0.5℃ (under constant temperature conditions)
4) Sample load capacity: 20 kg
Meets the standard:
The three‑box type high/low temperature shock test chamber complies with the relevant test standards GB/T 2423.1–2, GB 10592‑89, and GJB 150.
Structural features:
1. The three‑box type high/low temperature shock test chamber features fully computer‑controlled operation, with software developed in‑house and a user‑friendly interface that makes both operation and monitoring simpler and more intuitive. The “Keep Function” allows you to preserve the current state of your running program.
2. The values in this program segment can be temporarily modified, and time parameters can be set on the screen to enable automatic switching among cooling, heating, and basket‑lifting operations according to the preset settings.
3. The three-chamber high-low temperature shock test chamber features independently controlled cold and hot chambers, with separate doors, thereby expanding the range of applications (one chamber for three purposes).
4. The product’s thermal insulation performance is fully guaranteed.
5. The test chamber door is interlocked with the circulation fan and the basket‑lifting mechanism to ensure operator safety.
6. The top of the enclosure is equipped with standard lead‑in cable glands, facilitating the introduction of sensor cables, test leads, and other types of wiring into the enclosure.
Operation Control System:
1) Controller: The three‑box high/low temperature shock test chamber is equipped with an imported LED digital display and an integrated microcomputer controller featuring P, I, D plus S, S, and R control modes.
2) Accuracy range: Setpoint accuracy: temperature ±0.1℃, Indication accuracy: temperature ±0.1℃, Resolution: ±0.1℃
3) Refrigeration System: Equipped with an imported German Copeland semi‑hermetic water‑cooled compressor unit, and featuring a genuine French Tecumseh fully hermetic air‑cooled cascade refrigeration system.
4) Circulation System: Temperature-resistant, low-noise air-conditioning motor; multi-blade centrifugal impeller.
5) Temperature transition time: from the low-temperature zone to the high-temperature zone, or from the high-temperature zone to the low-temperature zone ≤ 15 s
6) Temperature recovery time: ≤5 min (depends on temperature recovery conditions, including cooling water temperature, exposure temperature difference, equilibration time, and sample weight). Temperature shock method: vertical two‑box method / vertical three‑box method (two‑box thermal shock test chamber / three‑box thermal shock test chamber).

(5) Materials and Components Used
The thermal shock test chamber consists of the following components:
High- and Low-Temperature Test Zone / Control System / Refrigeration System / Heating System / Airflow System / Drainage System
1. Test chamber body
A. This impact chamber adopts an upper–lower cabinet configuration: the upper section serves as a high‑temperature test chamber, while the lower section functions as a low‑temperature test chamber. The low‑temperature system is located on the left side of the working chamber, and the electrical control cabinet is mounted on the right side of the chamber for convenient operation.
B. The inner walls of the test chamber are fabricated from SUS304# stainless steel, while the outer casing is manufactured from high‑quality imported SUS304# stainless steel using a CNC punching press.
C. The high-temperature chamber employs ultra-fine glass fiber for insulation, while the low-temperature chamber uses polyurethane foam, asbestos board, and ultra-fine glass fiber; this results in excellent thermal insulation, ensuring that no frost or condensation forms on the exterior surface of the test chamber.
D. There is a condensate drain at the bottom of the low-temperature chamber.
E. The impact box body is equipped with one φ25 test port.
2. The control system primarily consists of an operator panel, a central controller, various pushbuttons and switches, and status indicators.
It consists of lamps, actuators, and other electrical devices.
3. Refrigeration and Heating Systems:
A. Uses a genuine imported compressor;
B. Equipped with both automatic and manual defrost circuits;
C. Sloped-fin tube evaporator;
D. Original imported refrigeration components, such as solenoid valves and dryer filters;
E. Internal spiral-type K-TYPE refrigerant copper tubing;
F, U-TYPE high-speed electric heating tube;
G. Equipped with a water-cooled condenser (with an accompanying cooling tower);
H. Uses environmentally friendly refrigerants 134a, 404A, and R23;
I. Other accessories: repair valve, electronic automatic expansion valve, and solenoid switch;
J. The heating system is housed within the air ducting and comprises multiple sets of nickel-chromium alloy threaded electric heaters and polytetrafluoroethylene‑coated silver‑plated aviation‑grade lead wires.
4. Circulatory System and Drainage System:
A. Equipped with an imported multi-blade centrifugal circulation fan and an imported motor;
B. FLOW THROW air supply method: horizontal diffusion with vertical heat exchange in an arc-shaped circulation pattern;
C. The drainage system employs a vortex-type drainage design and a U‑type sedimentation device.
D. The multi-blade wing-type fan blade ensures uniform distribution of the temperature field;
E. STAIN LESS: The extended shaft ensures an appropriate airflow volume.

(6) Materials and Components Used
1. Both the chamber body and the air-conditioning chamber’s supply and exhaust diffuser plates are fabricated from internationally standard SUS304 stainless steel, while the chamber’s outer shell is precision‑stamped using an imported SUS304 stainless steel sheet on a CNC punching press.
2. The central controller employs an imported 8226U LCD touch screen—either from Japan’s OYO or South Korea’s TEMI—and a programmable, dual-loop intelligent microprocessor temperature controller.
3. Digital over-temperature protection device.
4. The actuating electrical components adopt
A. Japanese “Omron” miniature relay
B. Taiwan “Yangming” solid-state relay
5. Temperature-sensing assembly: Extended shielded PT100 platinum resistance thermometer.
6. The heating leads within the air handling unit are made of polytetrafluoroethylene‑coated, silver‑plated aviation‑grade lead wires that can withstand high and low temperatures over long periods.
7. A nickel-chromium alloy threaded electric heater is employed.
8. The chiller is equipped with a hermetic compressor (Tecumseh, France).
9. Refrigeration components are sourced from imported brands and renowned domestic manufacturers.
10. The insulation material consists of rigid polyurethane foam reinforced with glass fiber.
11. The sealing material employs an environmentally friendly silicone rubber strip that can withstand high and low temperatures over the long term.

(7) Features and Advantages
Advanced and reliable control system:
1. Advanced energy-saving control design (see “Economical and Efficient Operating Mechanism” below);
2. We select electrical components from internationally renowned brands to enhance the overall quality of the equipment and ensure the high reliability of its critical parts.
Powerful control computer: impact temperature process controller—originally imported from Japan (OYO), featuring a color LCD touch screen with direct‑key operation, supporting both Chinese and English displays, and equipped with a high‑contrast, adjustable backlight for enhanced visibility.
A. Controller Specifications:
Accuracy: ±0.1℃ + 1 digit.
Resolution: ±0.1.
It features upper and lower limit standby and alarm functions.
Temperature input signal: Type T thermocouple.
P.I.D control parameter setting, P.I.D automatic calculation.
B. Screen Display Function:
The graphical control software features a dialog‑based interface, eliminating the need for keypad input; users can directly touch options on the screen, including program settings, curve display, historical data, manual operation, automatic operation, and auxiliary settings.
It can display the current operating status, temperature setpoint, time setpoint, remaining time, and remaining cycle count.
It features a dedicated program-editing screen, allowing you to input temperature, time, and the number of cycles.
The temperature program features real-time display of the program curve during execution.
Displays the fault status and provides troubleshooting instructions.
The screen’s backlight is adjustable, and the screen‑saver function can be set to activate after a specified time.
Chinese and English can be switched between.
C. Program Capacity and Control Functions: Number of Usable Program Groups: Up to 96 patterns (i.e., 96 test specifications can be independently configured and stored).
Repeatable command execution: up to 999 times.
SEGMENTS time setting: 0–99 hours, 59 minutes.
The program is developed with a dialogue-based configuration interface.
Interconnection functionality among 8 program groups.
It features power‑off program memory, automatically restarting and resuming execution upon power restoration.
Automatic temperature compensation during high–low temperature cycling.
The program can display graphical curves in real time during execution.
Defrost timing, frequency, and temperature settings, along with their execution functions.
It features scheduled start-up and shutdown functions.
It features date and time adjustment functions.
D. The test chamber is equipped with an R‑485 computer interface, enabling computer‑based control of functions A through H and the storage of impact‑process data (including date, cold‑hot shock duration, impact temperature, and other relevant information).
E. High‑quality refrigeration configuration: To achieve lower test temperatures, the most mature approach for environmental testing equipment today is cascade refrigeration. The underlying principles of this method are largely similar; the key lies in the design and configuration of the refrigeration system.
1. Refrigeration Compressor: The heart of the refrigeration system is the compressor, and we have selected the world‑renowned Bitzer industrial refrigeration compressor from Italy.
2. Imported oil separators and refrigeration oils: Whether the refrigeration compressor is adequately supplied with high‑quality, properly formulated refrigeration oil directly affects its service life. If refrigeration oil enters the refrigeration system—particularly the heat exchangers—it will significantly degrade system performance. Therefore, an oil separator must be installed in the system. Based on our long‑term experience with imported oil separators, the “ESK” units from Germany and the “ALCO” units from the United States offer the best performance, while the “Taiyo” brand refrigeration oil from Japan provides the most stable performance and viscosity.
3. High-efficiency condenser–evaporator: This unit employs a state-of-the-art brazed plate heat exchanger manufactured in Sweden, which consists of multiple corrosion-resistant stainless steel plates stamped into a chevron‑shaped corrugation. Adjacent pairs of plates have corrugations oriented in opposite directions, with the crests intersecting to form numerous brazed joints. The intricate network of intersecting flow channels induces turbulent flow on both sides, significantly enhancing heat transfer performance. Moreover, the vigorous turbulence combined with the smooth stainless steel surface helps prevent fouling on the internal surfaces of the heat exchange passages. By adopting this heat exchanger, system pressure drop is reduced, and the shortcomings of earlier domestically produced large‑scale low‑temperature test chambers—namely, bulky dimensions, poor heat transfer, and low efficiency—are effectively addressed.
4. High-efficiency finned evaporator: The finned evaporator boasts a heat transfer efficiency 30% higher than conventional evaporators and offers advantages such as an attractive appearance, compact size, and rapid cooling.
5. Refrigeration Auxiliary Components: In this equipment’s refrigeration system, other auxiliary components—such as solenoid valves and screening units—are all sourced from renowned international brands, further enhancing the system’s reliability.
6. Comprehensive safety protection devices: When the control system detects that any of the following protective devices (partial list) have been activated, it will automatically cut off power to shut down the entire machine and trigger an audible and visual alarm.
A. System control circuit fuse;
B. System overcurrent protection device;
C. Equipped with a fuseless protective switch;
D. Over-temperature protection device;
E. Overload protection device for the refrigeration compressor;
F. High- and low-pressure protection switches for the compressor;
G. Phase-loss protection switch;
H. Fault indicator light;
I. Emergency stop switch;
J. Display and alarm for controller setting errors.

(8) Equipment Operating Conditions
1. Ambient temperature: 5°C to 35°C
2. Relative humidity: ≤85% R.H.
3. Atmospheric pressure: 86–106 kPa
4. The surrounding environment must be free of strong vibrations, strong electromagnetic fields, high concentrations of dust, and flammable, explosive, volatile, or corrosive substances; direct sunlight or other direct thermal radiation must also be avoided (this is of critical importance).
5. The test chamber shall be placed horizontally in a well-ventilated laboratory, with at least 1.5 meters of clearance around it for operation and maintenance.
6. A drainage channel suitable for disposing of overflow water from the test chamber shall be provided near the test chamber.

(9) Power supply requirements for the equipment
a. Power supply: AC 3-phase, 5 kW, 380 V, 50/60 Hz.
※ Permissible voltage variation: ±10% of the rated voltage.
b. Maximum load capacity: 20 kVA
(10) The quotation includes the water tower and associated piping system, but excludes costs for wall chiseling, hoisting, and other related works required to install equipment on upper floors.