Rapid temperature rise and fall testing machine

1. product name

name

model

Rapid temperature change test chamber

JW-TH-2304C-5

2. Product Advantages

Our company has multiple industry design engineers and years of experience in collaborating with European technology, making our products energy-efficient Neat appearance beautiful. Advantages of stable performance and high reliability.

Humanization of enterprise services:

One: There are manufacturing factories and technical centers within a 200 kilometer radius (calculated as a 4-hour drive) from the client to ensure understanding of pre-sales On sale After sales service The speed and rationality of service;

Secondly, toZero feeAs a corporate culture, the lifelong service model should be implemented conscientiously;

3. Sample Description

This experimental equipment prohibits:

Testing and storage of samples of flammable, explosive, and volatile substances

Testing and storage of corrosive substance samples

Testing or storage of biological samples

Testing and Storage of Strong Electromagnetic Emission Source Samples

4. Volume and size

Nominal content volume

Inner box dimensions

Overall dimensions

2304L

W1800×H 800×D1600 mm
W2320×H1850×D2070 mm

5. performance

5.1.Test environment conditions

5.2.test method

The airflow around the equipment is unobstructed, without high concentration dust, corrosive or flammable gases
The ambient temperature is5～35℃
relative humidity≤85%RH
Circulating cooling water temperature≤30℃
The supply pressure of circulating cooling water is0.25～0.4MPa(There is no such requirement for air-cooled equipment)

The temperature change rate meets the relevant standards

5.2.1 Temperature Range

-40℃～+180℃

5.2.2 Temperature fluctuation

≤ ±0.5℃Under no-load conditions, when the equipment is in a stable state, the change in temperature at the center point of the workspace over time, measured as half of the difference between the highest and lowest temperatures, is represented by "±", which is the temperature fluctuation degree ℃.

5.2.3 Temperature uniformity

≤ 2℃Under no-load conditions, after the equipment reaches stability, the arithmetic mean of the difference between the highest and lowest temperatures measured in each test is the temperature uniformity.

5.2.4 Temperature deviation

≤ ±2.0℃Under no-load conditions, the temperature deviation is the difference between the average value measured at the center point of the equipment within the specified time and the average temperature displayed on the equipment.

5.2.5 Temperature change rate

When the temperature range is between -40 ° C and+165 ° C, the average heating and cooling rate must be greater than or equal to 5 ° C/min (35kg at full load)
The temperature range is between -30 ° C and+165 ° C, and the heating and cooling rate must be greater than or equal to a linear 3 ° C/min (35kg at full load)

5.2.6 Humidity Range

Humidity range: 20-98% RH (+25 ℃~+85 ℃)

5.2.7 Relative humidity deviation

+2/-3% RH

5.3.Meet the testing standards

IEC68-2-1 (GB/T2423.1-2001 Test A: Low temperature test method)

IEC68-2-2 (GB/T2423.2-2001 Test B: High temperature test method)
IEC60068-2-30 (GB/T2423.4-1993 Test Ca: Alternating Damp Heat Test)
GB105861 Technical Conditions for Damp Heat Test Chamber

GB10589 Technical Conditions for Low Temperature Test Chamber

GB11158 Technical Conditions for High Temperature Test Chamber
GJB150.9-1986 Damp Heat Test

GJB150.3-1986 High Temperature Test
GJB150.4-1986 Low temperature test

6. structural characteristics

6.1.Thermal insulation enclosure structure

Outer wall material: double-sided galvanized steel plate, surface high-grade spray coated steel plate or stainless steel plate SUS304

Inner wall material: stainless steel plate SUS304,

Box thermal insulation material: rigid PU foam 100MM

6.2.Windows

single door
Insulated glass observation window for power distribution and anti condensation on the doorSize: 360cm * 450cm

Door frame equipped with anti condensation electric heating device

6.3.Control Panel

Temperature (humidity) control display screen, over temperature protection setting device, emergency stop switch, operation indicator light, fault indicator light, buzzer, operation button, lighting switch

6.4.machine room

The mechanical room includes: refrigeration unit, drainage system, fan, and distribution control cabinet

6.5.distribution control cabinet

Cooling fanbuzzerTemperature and humidity recorder (optional), distribution board, sample test terminal

RS-485 physical interface

Main power leakage circuit breaker

6.6.heater

Nickel chromium alloy electric wire heater

Heater control method: contactless equal period pulse width modulation, SSR (solid-state relay)

6.7 Humidifier

6.7.1 Humidification method: water tray heating

6.7.2 Humidifier Quality: Stainless Steel Armor

6.7.3 Humidifier Control Method: Contactless Equal Periodic Pulse Width Modulation, SSR (Solid State Relay)

6.7.4 Humidifier device: water level control device, heater anti dry burning device

7. refrigeration system

7.1.working method

windCold mechanical compression refrigeration method

7.2.制冷原理

The refrigeration methods are divided into vapor compression refrigeration, absorption refrigeration, vapor jet refrigeration, gas expansion refrigeration, and thermoelectric refrigeration. Among the above refrigeration methods, vapor compression refrigeration is the most widely used and commonly used refrigeration method in environmental testing equipment. Its principle is to use the latent heat of evaporation of liquids such as Freon to absorb heat from the cooled object and achieve refrigeration. The single-stage refrigeration cycle diagram is a schematic diagram of the vapor compression refrigeration cycle process. The liquid entering the evaporator through expansion valve throttling absorbs latent heat of evaporation from surrounding objects and evaporates. After evaporation, it becomes a low-temperature and low-pressure gas that is sucked in by the refrigeration compressor. After compression by the compressor, it becomes a high-temperature and high-pressure gas that enters the water-cooled or air-cooled condenser, where it is cooled into high-pressure liquid, and then enters the evaporator through the expansion valve. This cycle repeats, absorbing heat from low temperatures to achieve refrigeration, and then releasing heat from high temperatures.

Single stage refrigeration cycle diagram

In the refrigeration cycle shown in the single-stage refrigeration cycle diagram, a change from one state to another is called a process. The refrigeration cycle consists of four processes. Below are four processes in the refrigeration cycle.

（1）.Evaporation process: Low pressure wet steam, after expansion and throttling, absorbs heat and cools from the surrounding medium in the evaporator, gradually increasing its dryness. In this way, the gas coming out of the evaporator has become dry saturated vapor or slightly superheated vapor. During the evaporation process, the temperature and pressure of the refrigerant remain constant.

（2）.Compression process: After completing the refrigeration effect, the vapor coming out of the evaporator enters the refrigeration machine, and after compression, the temperature and pressure rise sharply. So the gas discharged from the refrigeration machine becomes hot steam with high degree of superheat. During the compression process, the entropy value of the refrigerant remains unchanged.

（3）.Condensation process: The high-temperature and high-pressure superheated vapor discharged from the refrigeration unit enters the condenser and exchanges heat with cooling water or air, gradually turning the superheated vapor into saturated vapor and then into saturated liquid. When cooled with cooling water, the saturated liquid temperature will continue to decrease, resulting in supercooling. The pressure remains constant during the condensation process.

（4）.Throttling process: The liquid coming out of the condenser is throttled by expansion valves or capillary tubes and other throttling devices, becoming low-temperature and low-pressure wet vapor. During the throttling process, the enthalpy value of the refrigerant remains unchanged.

The above four cycles are continuously cycled in sequence to achieve the cooling purpose.

To complete the thermodynamic processes of the refrigeration cycle, it is necessary to form a system consisting of a compressor, heat exchanger, piping, piping accessories, etc., which is called a refrigeration system.

Single stage compression refrigeration refers to the process where refrigerant vapor undergoes only one compression, and its lowest evaporation temperature can be controlled within a certain range-30c～-40cWhen a lower test temperature is required, a cascade refrigeration system is usually used, which involves stacking two single-stage compression refrigeration systems together. One of the systems is the high-temperature section, using medium temperature refrigerant; The other system is the low-temperature part, which uses low-temperature refrigerant. The evaporator in the high-temperature section overlaps with the condenser in the low-temperature section to form a condensing evaporator.

7.3.refrigeration compressor

2piece7.5P Italian FujiwaraLow temperature and high-efficiency typehalfClosed compressor

7.4.evaporator

Fin type heat exchanger (also serving as a dehumidifier)

7.5.Throttling device

Thermal expansion valve, capillary tube

7.6.Control mode of refrigeration machine

The control system automatically adjusts the operating conditions of the refrigeration machine according to the test conditions

Condensation pressure regulating valve (cooling water flow regulating device)

Compressor return air cooling circuit

Energy regulation circuit

7.7.refrigerant

7.8.other

R404AR23

The main components are made of high-quality branded products (please refer to the quotation list)

8. electric control system

8.1.controllermodel

JOOWAY 880

Feature Overview

The controller system mainly consists of two parts. Namely LCD control panel and input/output control board (I/O board).

The LCD controller displays the cause and solution of the fault in Chinese characters based on the alarm signal transmitted through communication to the I/O board; Users can choose between English and Chinese menus as needed; The LCD controller is equipped with a lithium battery and a calendar clock in its memory. It has the functions of power outage protection and timed power on/off.

monitor

5.7-inch 320X240 dot matrixHigh contrast with backlight functionLCD monitor

Operation mode

Program mode, fixed value mode

Setting method

Chinese menu, touch screen input

8.2 Specifications:

8.2.1 Accuracy: Temperature ± 0.1% F.S

8.2.2 Resolution: Temperature 0 1℃

8.2.3 Temperature slope: adjustable from 0.1 to 99 ℃

8.2.4 Equipped with upper and lower limit standby and alarm functions

8.2.5 Input signal: DRY/NET, PT100/4-20mA 4-20mA 4-20mA/4-20mA selection

8.2.6 Temperature conversion output: 10mv/1 ℃,

8.2.7 Six sets of PID control parameter settings, PID automatic calculation

8.3 Screen display function:

8.3.1 Face to face dialogue with drawing, no need for button input, touch options directly on the screen

8.3.2 Direct display of temperature and humidity settings (SV) and actual (PV) values

8.3.3 Can display the current execution program number, segment number, remaining time, and number of cycles

8.3.4 Accumulated operating time function

8.3.5 Temperature and humidity program settings are displayed in graphical curves, with real-time display of program curve execution function

8.3.6 With a separate program editing screen, each page can input 10 segments of temperature, humidity, and time

8.3.7 Fixed point or program action status display

8.3.8 Chinese display: a. Precautions before startup, b. Maintenance methods, c. Troubleshooting instructions

8.3.9 The screen can be adjusted for 17 backlight segments

8.3.10 The screen display protection function can be set to timed, TIMER, or manually disabled

8.4 Program Capacity and Control Function

8.4.1 Available program quantity: Up to 20 groups, each program up to 59 steps, can be set up to 20

8.4.2 Available memory capacity: 1000 SEGMENT

8.4.3 Repeatable Command Execution: Each program command can be executed up to 99 times

8.4.4 The production of the program adopts a conversational approach and has functions such as editing, clearing, and inserting

8.4.5 Three sets of time signal output control (controllable control of the ON/OFF action of the test object)

8.4.6 Program execution with skip file and hold function

8.4.7 SEGMENT Time Setting 0-99Hr59min

8.4.8 Has power-off program memory, automatically activates and continues to execute program functions after power restoration

8.4.9 Equipped with RS-485 communication interface (software sold separately)

8.4.10 Real time display of graphical curves during program execution

8.4.11 Equipped with reservation activation and shutdown functions

8.4.12 has date and time adjustment function

8.4.13 Button and screen lock (LOCK) function

The 8.4.14 system can also be equipped with a printer to record temperature data during the testing process, and can also be used to print a user set list of testing procedures.

8.5 Input: T-shaped armored thermocouple.

8.6 Communication function (optional):

RS-485 interface, with local and remote communication functions (requires monitoring software, RS-485/RS-232 converter, and occupies one COM port of the PC); Zui can connect up to 16 devices simultaneously, with a cumulative cable length of up to 800m

8.7 Control mode:

8.7.1Anti integral saturation PID

8.7.2BTC Balance Temperature Control Method (Temperature Test Equipment)

8.7.3BTHC Balanced Temperature and Humidity Control Method (Temperature and Humidity Testing Equipment)

8.8Printing function: Can be connected to a temperature and humidity recorder (optional)

8.9Additional functions:

Fault alarm and cause, processing prompt function, power-off protection function, upper and lower temperature protection function, timing function (automatic start and automatic stop operation), self diagnostic function.

8.10 Software usage environment:IBM PC compatible machine, with a P Ⅱ or higher CPU, 128MB or more of memory, running on Simplified Chinese Windows 2000 or Simplified Chinese Windows XP operating system

8.11 Temperature and humidity measurement

Temperature: T-shaped armored thermocouple

8 Safety protection devices

refrigeration system

Compressor overpressure

Compressor motor overheating

Compressor motor overcurrent

laboratory

Adjustable over temperature protection

Test space temperature fuse

Extreme overheating of air conditioning channel

Security door lock that can be opened from the inside

Fan motor overheating

other

Main power phase sequence and phase loss protection

Leakage protection, load short circuit protection

One five core (four core cable+protective grounding wire) cable（2.5Meter long)

9 Other configurations

Sample power terminal

Relay contact control, within 220VAC 2A (when operating normally, the contacts close; when the equipment stops or malfunctions, the contacts open)

Main power leakage circuit breaker

10. Choose attachments (functions). The following attachments (functions) should be quoted separately and specifically stated in the contract or technical agreement

power cable

One five core (four core cable+protective grounding wire) cable（Provide according to customer requirements）

Lead hole

The lead holes have diameters of 50mm and 100mm, and their positions and quantities can be customized according to user requirements within the allowable conditions of the chamber structure

Centralized monitoring software

Used for remote centralized monitoring, accompanying software（Centralized monitoring softwareEquipped with one RS-485/RS-232 converter

Software usage environment: IBM PC compatible machine, P Ⅱ or above CPU, 128MB or above memory, Simplified Chinese Windows 2000 or Simplified Chinese Windows XP operating system

11 Transportation

The main structure of the laboratory is assembled, and each part is transported to the user's installation site for assembly

The refrigeration system and air conditioning channel are transported as separate units

The size of the largest transportation unit (excluding packaging): see the external dimensions.

12. The user guarantees the following conditions for use:

venue

The ground is flat, well ventilated, and free of flammable, explosive, corrosive gases and dust

There is no strong electromagnetic radiation source nearby

There is a drainage floor drain near the equipment (within 2 meters of the refrigeration unit)

Ground bearing capacity of the venue: not less than 600kg/m2

Leave appropriate maintenance space around the equipment

environmental conditions

The airflow around the equipment is unobstructed, without high concentration dust, corrosive or flammable gases
Temperature: 5 ℃~35 ℃

Relative humidity: ≤ 85% RH

Air pressure: 86-106kpa

power supply

AC380V three-phase four wire+protective earth wire

Voltage allowable fluctuation range: AC (1 ± 10%) 380V

Allowable frequency fluctuation range: (1 ± 1%) 50Hz

The grounding resistance of the protective grounding wire is less than 4 Ω; TN-S power supply or TT power supply

Require users to configure corresponding capacity air or power switches for the equipment at the installation site,

And this switch must be independent and specifically designed for use with this device

The highest total power:18kilowatt

Requirements for storage environment

When the equipment is not working, the ambient temperature should be maintained within 5-45 ℃

When the ambient temperature is below 0 ℃, the water remaining in the equipment should be drained completely to prevent the water in the pipeline from freezing