-140℃ cryogenic capture pump
Why Install a JRD Cryogenic capture pump for high vacuum systems
1. In the vacuum system, water vapor is the biggest obstacle affecting the pumping speed of the vacuum device, and the cold and deep cold trap pump
It can quickly and effectively capture between 65% and 95% of the water vapor in the residual air of the system, reducing the time spent pumping steam
The efficiency is up to 80%. Production can be increased by adding a cold and cryogenic trap pump to the existing vacuum system
Capacity 30% to 100%, but also improve the coating quality.
2. In the vacuum system, water vapor is the biggest source of pollution, so it is necessary to obtain higher coating quality
To lower vapor partial pressure, can enhance the adhesion of the film, improve the coating quality, in the evaporation of all kinds of decoration
Color difference is avoided in the material process, and the corner surface can be uniform and flat in the evaporation process of the plastic substrate.
Why can the cold and deep cold trap pump speed up the pumping speed and improve the vacuum degree of the high vacuum device
A very low temperature deep cold coil is placed in the vacuum chamber or the oil diffusion pump port, according to the low temperature condensation effect of the gas, can quickly condense the water vapor and other gases in the vacuum system on the deep cold coil, which can quickly achieve the effect of reducing the pressure in the vacuum chamber, greatly reducing the vacuum time, and can increase the vacuum degree by half to an order of magnitude. Therefore, it greatly improves production efficiency and saves production costs, so it is known as a good helper of the vacuum industry and an energy-saving pioneer of vacuum coating system.

Hanyi Technology Company adopts the most advanced single-machine automatic overlapping refrigeration system, selects the world's famous brand compressor and refrigeration accessories, adopts the new environmental protection mixed refrigerant, developed a series of new -140℃ cryogenic capture pump, and through technical improvement to make the company's cryogenic capture pump performance better and more stable. The cryotrap pump produced by the company has the characteristics of fast cooling speed, low cooling temperature, no oil plugging, wider cooling water temperature range, easy installation and operation, and the indicators have reached the international leading level, so it is favored by the majority of vacuum coating users
Advantages of cold and deep cold trap pump
1. It can shorten the pumping time by 30% to 80%
2. It can increase production capacity by 30% to 100%
3. It can be cooled and warmed quickly, and can be recycled for a long time
4. Dual load can be designed and installed in the vacuum chamber and oil diffusion pump port at the same time
5. Do not need to use expensive liquid nitrogen, can quickly recover the cost
6. Perfect control system composed of touch screen and Siemens PLC
7. Multi-channel temperature display, defrosting temperature can be set freely
8. It can be flexibly installed on existing vacuum coating systems and is easy to install without any influence on joints, intake pipes, valves and baffles.
9. Simple operation interface, perfect protection measures, and remote control can be fully compatible with the existing vacuum coating system.

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How to select cryogenic trap pump

The choice of cryotrap pump model is mainly based on the water vapor pumping speed and vacuum chamber and vacuum chamber refrigeration coil capacity to determine, in general, the longer the pipe, the faster the gas capture speed, generally we recommend pumping speed than the existing pumping speed

Increase by 4 times, so that the vacuum time will be reduced by 30% to 80%, once the general specifications of the cryogenic capture pump and the surface area of the refrigeration coil are determined, it can be calculated for the additional various thermal loads (such as connecting pipes, heat in the production process, etc.)

Temperature and cooling capacity.

How to determine the temperature required for optimal trapping of gas
You can find the ultimate pressure of your system in the table below, and according to this pressure, the corresponding temperature value on the right side of the line is the surface temperature of the cooling coil you need, which provides 90% water vapor capture efficiency.

Note: Under specific conditions, the surface area of the refrigeration coil can be increased to improve the speed of water vapor capture, but at the same time, the heat load of the system will be increased, and users can flexibly choose according to actual needs

In actual production, the refrigeration coil of the cryotrap pump is installed in the vacuum coating machine in the following three ways:
1) Installed in the channel of the vacuum chamber or the upper and lower parts of the vacuum coating chamber, it is mainly used to capture the residual gas of the vacuum chamber and the gas volatilized from the evaporation product to accelerate the pumping speed, improve the vacuum degree, and enhance the coating quality. Because the refrigeration coil will frost or dew due to the entry of outside air after opening the door, which will affect the next vacuum pumping. Therefore, before each opening the door, the refrigeration coil should be returned to the temperature operation (as shown in the following figure).
2) Installed below the high valve of the oil diffusion pump port, the main purpose is to prevent the oil vapor of the oil diffusion pump from returning to the vacuum chamber, and at the same time, it can improve the vacuum degree. Because it has been in a vacuum state here, there is no need to return the temperature of the refrigeration coil.
3) The cryotrap pump can be designed for dual output and installed in the vacuum chamber and oil diffusion pump port at the same time.

A: Refrigeration coil installed at the valve opening B: refrigeration coil installed at the bottom of the vacuum chamber
C: Standard input device (vacuum insulated pipe) D: connecting pipe

Refrigeration coil:
Refrigeration coils can be designed according to the specific requirements of users, refrigeration coils usually have spiral, spiral, snake or other shapes or users choose. Common coils are shown in the following figure

Standard input device, 52mm diameter hole in the cavity wall, threaded connection, O-ring seal, user can also customize the input device

The connecting pipe is composed of two copper pipes and insulation materials, both ends can be welded or made into a live mouth, the length can be made according to user needs, because the pipe itself should be considered as a thermal load, so when the pipe length exceeds 4m, the larger product should be selected.

The material of the single-channel input device is stainless steel or carbon steel. A 28mm diameter hole is opened on the cavity wall and welded directly with the cavity wall. Because it is a single channel, two pieces need to be welded.

Control system
Advanced control system, simple operation interface, perfect protection measures
Main control components: Siemens PLC and touch screen, Siemens thermocouple module, Schneider AC contactor
Control panel: touch screen display, compressor operation indication, alarm indication, distance transfer switch, remote operation indication
Temperature display: refrigeration temperature, standby temperature, cooling water temperature and other multi-channel temperature display, the running status bar has standby operation, refrigeration operation, defrost operation and other status display, fault alarm bar has high water temperature alarm, high water temperature shutdown, power supply phase shortage, compressor overload, exhaust temperature over high protection measures
Comprehensive window: comprehensive screen has curve display, alarm query, animation demonstration, precautions, cryostat pump working flow chart and other screens
Working flow chart: When the cryostat pump is used with the vacuum coating machine, the switching time of the cryostat pump, the opening time of refrigeration and the opening time of defrosting are introduced in detail, so as to play the best performance of the trap pump.

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