Low-Pressure Test Box Is Used To Determine The Test Box Of
Instruments, Electrical Products, Materials, Parts, Equipment
The low-pressure test chamber is mainly used to test the
environmental adaptability and reliability of the test piece under
low pressure, high temperature, low temperature, or at the same
time, and to measure the electrical performance parameters of the
test piece at the same time.
Vacuum system
1. The composition of the vacuum system: the vacuum system is an
integral part of obtaining the vacuum degree and measuring and
controlling the vacuum degree. It is composed of a vacuum measuring
system and a vacuum obtaining unit.
2 Vacuum degree measurement: The vacuum degree is measured by a
pressure sensor. The vacuum gauge uses pressure strain to achieve
vacuum degree measurement. The measurement data is a linear
electrical signal, which can be directly input to the equipment
controller for display and control.
Application:
Low-pressure test chambers are mainly used in aviation, aerospace,
information, electronics and other fields to determine the
environmental adaptability and reliability tests of instruments,
electrical products, materials, parts, and equipment under low
pressure, high temperature, low temperature, or both. , And or at
the same time energize the test piece to measure the electrical
performance parameters. It adopts an integral combined structure.
The test box consists of a heat preservation box (pressure-bearing
structure) at the front, a refrigeration and vacuum unit at the
rear, and a test box at the rear. The electrical controller
(system) on the gate is composed.
Reference standard
GB10590-89 low temperature and low pressure test chamber technical
conditions;
GB15091-89 high temperature and low pressure test chamber technical
conditions;
GB11159-89 low pressure test chamber technical conditions;
GB/T2423.25-1992 low temperature/low pressure comprehensive test
chamber;
GB/T2423 .26-1992 High temperature and low pressure comprehensive
test box;
GJB150.2-86 low temperature and low pressure (altitude) test;
Structural features of test box:
1. The test box body is formed by laser processing, which is
beautiful and generous in shape, with no reaction handle, and easy
to operate.
2. The inner box is made of imported first-class stainless steel
(SUS304) mirror plate, while the outer box is made of brushed
stainless steel or first-class cold-rolled steel plate, which
increases the appearance texture and cleanliness.
3. A large observation window is equipped with a light to keep the
inside of the box bright, and the inside situation of the box can
be clearly observed at any time by using tempered glass embedded in
the heating body.
4. A test hole with a diameter of 50mm is provided on the left side
of the box, which can be used for connecting test power cord or
signal cable externally.
5. The insulation material is made of high-density glass fiber
cotton with a thickness of 100mm.A double layer of high tension and
low temperature resistant sealing strip is adopted between the door
and the box body to ensure the sealing of the test area.
6. An independent temperature limit alarm system is set up to
ensure the safety of the test without accidents when the
temperature exceeds the limit and the operation is automatically
interrupted.
Technical Parameters
Specifications Model | MTA-405 |
Applicable scope | This equipment is used to simulate the reliability and performance
evaluation of products at high altitude and low pressure. |
Structure part | Box | Double-sided galvanized steel, surface spray treatment |
Inner box | Using stainless steel plate SUS304 (size can be customized) |
Observation window | The door is equipped with a window, a glass window for the
multi-layer vacuum glass, with automatic defrost function, the
glass surface of the film electronic heating can guarantee any test
glass surface frost and condensation |
Bear the way | The use of high-quality 5mm thick sus304 non-slip stainless steel
plate as the pressure within the box, in the box and the outer box
asked around the use of steel to strengthen its overall pressure
strength design capacity of more than 10t / m. The walls are
smooth, smooth, burr and pits, easy to clean, in the course of the
use of water will not appear |
Technical Parameters | display | PLC touch screen display |
Pressure range | 11.6kPa-101.3 kPa |
Pressure fluctuation | ≤5% |
Vacuum Description | 1.3Kpa (standard requirements at an altitude of 15240m 11.6Kpa,
vacuum table indicates the value of 89.7Kpa) Note: due to the atmospheric pressure inside the box Atmospheric pressure: (101.325Kpa), but at this time want to box
atmospheric pressure down to (11.6Kpa). According to the standard
atmospheric pressure (101.325Kpa) to calculate the box to take away
(89.7Kpa) of the pressure, this time is (11.6Kpa) low-pressure
environment. Because now the table used to show negative pressure,
so the table shows the negative pressure (89.7Kpa), the box there
are (11.6Kpa) low pressure. |
Structure technology
1.Company hardware equipment Imports of German laser laser machine
1; Title of the AMADA AIRS-255NT punching and a Taiwan; Germany for
all types of carbon dioxide welding machine and argon welding
machine more than 10 Autodrsk inventor 3D graphics software, 3D
sheet metal demolition and design of virtual assembly.
2.Shell made of high quality galvanized steel, electrostatic powder
coating to be paint;
3.The inner box is made of imported SUS # 304 stainless steel, with
full welding process to prevent leakage and penetration of high
temperature and high humidity air inside the box; inner liner
fillet design of inner box can better discharge condensate of side
wall.
2.Shell made of high quality galvanized steel, electrostatic powder
coating to be paint;
3.The inner box is made of imported SUS # 304 stainless steel, with
full welding process to prevent leakage and penetration of high
temperature and high humidity air inside the box; inner liner
fillet design of inner box can better discharge condensate of side
wall.
Refrigeration series of technology
1.standardization
1.1 High-quality steel pipe and welding process standardization;
according to the standard tube layout to ensure stable and reliable
model system;
1.2 Imports of Italian imports of pipe bending machine the whole
bend, a significant reduction in solder joints and welding
generated when the pipe oxide, improve system reliability!
2.Pipeline shock and support
2.1 The United States and Tyco on the support of the cooling copper
pipe has strict requirements, taking into account the pipeline
shock conditions in the cooling pipe to increase the arc and
bending the use of special nylon clip fixed way to avoid the
circular vibration and temperature changes caused by Pipe
deformation and leakage, improve the reliability of the entire
refrigeration system.
2.2 No oxidation welding process
As we all know, the cleanliness of the refrigeration system is
directly related to the efficiency of the refrigeration system and
operating life; the United States and Tyco welding operation using
standardized to avoid a large number of pipe oxide pollution when
welding!
Control circuit technology
1. Power distribution layout According to the technical department
of the distribution assembly plans to install electrical components
used internationally renowned brands: Omron, Schneider, Germany
phoenix terminals, line code clearly marked.
Selection of the old domestic brand, (Zhujiang cable) to ensure
that the quality of the wire; control line minimum 0.75 square RV
soft copper wire, all the major load such as motor compressors are
based on EC trunking safety current standard trapping trail
selection! Compressor cable box cable mouth with sealant
processing, to prevent frosting junction box terminal short
circuit.
All terminal screws are connected to the standard fixed torque, to
ensure reliable fastening to prevent loose ignition and other
hidden dangers!
Refrigeration Technology
3D refrigeration system management drawing
Variable Frequency Control Technology of Refrigeration System
In the frequency conversion refrigeration system, even if the power
frequency 50HZ is fixed, can change the
frequency through the frequency changer, thus adjusts the
compression rotational speed, causes the cold quantity
continuously to change, guarantees the compressor movement load in
the test box the actual load to match (namely
test body temperature Increase, the compressor frequency to rise,
improve the cooling capacity, on the contrary, the
compressor frequency to reduce and reduce the cooling capacity)
greatly saves the unnecessary loss of operation to achieve
energy-saving purposes. In the beginning of the test chamber can
also run by increasing the frequency of the compressor to improve
the capacity of the cooling system to achieve the purpose of rapid
cooling.
The chamber adopts frequency conversion refrigeration system, which
can precisely control the temperature of the box body, make the
temperature of the box body constant, the temperature fluctuation
is small, and the suction and discharge pressure of the
refrigeration system is stable and the compressor runs stably and
reliably. Electronic expansion flow servo.
Refrigeration system technology Other energy - saving technologies
A) The use of PID + PWM principle VRF technology (electronic
expansion valve according to the thermal conditions of flow
control)
Low-temperature working state, the heater does not participate in
the work, through the PID + PWM regulation of the cooling (cooling
capacity of the air flow control system); low-temperature working
conditions, the use of the principle of PID PID VRF technology
(refrigerant flow control) Flow rate and flow direction of the
cooling pipe, cold side of the pipeline, heat the next three-way
flow pipe to adjust to achieve the work of the temperature is
automatically constant, this method in low temperature conditions,
the studio can automatically achieve a constant temperature, Low
temperature conditions, can achieve a 30% reduction in energy
consumption. The technology is based on Danfoss ETS system
electronic expansion valve, can be applied to different cooling
capacity requirements of the cooling adjustment, both at different
cooling rate requirements, to achieve the compressor cooling
capacity adjustment.
B) the size of two sets of compressor design technology, according
to load conditions automatically start and stop (large series is
designed)
The refrigeration unit is equipped with a set of semi-hermetic
compressors composed of binary cascade refrigeration system plus a
full-density single-stage refrigeration system. Configure the
mother; according to the load conditions inside the box and the
cooling rate of intelligence to open the different compressor
groups, so that the cooling capacity of the box and the compressor
output power to achieve the best match, in order to achieve the
best operating conditions in the compressor section circle to
Extend the service life of the compressor. More importantly, a
large set of traditional design compared to the energy-saving
effect is very obvious, you can achieve more than 30% of the
temperature control. With VRF technology)
FAQ
1. Do you offer after-sales service? How can I ask for that? And
how about the warranty?
We offer complete engeneering and technical support ,prompt
emergency service,remote installetion,remote maintenance service
and more.We are equipped with over 20 technical and support you.All
of the products from MENTEK comes with 12 Month warranty.
2. What’s the delivery term?
The products delivered to you within 7 days for our stock items
from clearance of payment. It will take 25-to-35 working days for
custom made products or equipments that are not available from
stock.
3. Do you accept customization service? Can I have my logo on the
machine?
Yes,all of our product can be customized and if you have
requirement of logo, we also can do it for you.
Q:How about the packing for machine, is it safely protected during
transportation?
All of the products from MENTEK,first protected by resin fiber and
PP film, then put into Strong wooden case.We can ensure the safety
of our products.
Q:Can we visit your factory before order?
Yes,and we welcome customers to visit our factory.
How can I become an overseas agent for your company?
Add my Wechat,Whatsapp,Skype +86 15617685848