CN204987662U - Automatic device of control vacuum freezing desiccator vacuum and humidity - Google Patents

Abstract

A device for automatically controlling the vacuum degree and humidity of a vacuum freeze dryer, including a control panel, a vacuum gauge, a vacuum valve, a vacuum pump, a liquid crystal screen, and a humidity sensor. Its feature is to control the vacuum pump to start and stop automatically according to the set vacuum degree. The freeze dryer stops working when the humidity reaches the set value. The control board controls the vacuum gauge, vacuum valve, vacuum pump, humidity sensor, and the LCD screen sets the vacuum degree and humidity. During the vacuum drying process of the freeze dryer, the vacuum degree in the cold trap is monitored by the vacuum machine. When the vacuum degree reaches the set value, the vacuum pump stops working and the pressure in the cold trap is maintained by closing the vacuum valve. When the vacuum degree is higher than the working value The vacuum pump and vacuum valve are turned on at the required vacuum level. The humidity of the item is monitored by the humidity sensor. When the humidity of the item reaches the set value, the vacuum freeze dryer stops working.

Description

A device for automatically controlling the vacuum degree and humidity of a vacuum freeze dryer

technical field

The device for automatically controlling the vacuum degree and humidity of the vacuum freeze dryer can automatically control the vacuum degree and humidity of the vacuum freeze dryer during the working process, thereby reducing energy consumption and making it convenient for users to use.

Background technique

The current situation of the existing vacuum freeze dryer in terms of vacuum degree and humidity control:

1) In the vacuuming stage, after reaching the required vacuum degree, the vacuum pump continues to run until the entire drying process is over; 2) Whether the item can reach the required humidity after drying requires the user to test the drying time many times.

Disadvantages: 1) The vacuuming time of the vacuum freeze dryer often exceeds 20 hours. When the vacuum degree in the drying barrel reaches the working requirements, the vacuum pump continues to run, wasting energy. 2) It is extremely inconvenient for users to find out the time of vacuum drying through repeated experiments.

Contents of the invention

In order to overcome the above shortcomings, the purpose of the device for automatically controlling the vacuum degree and humidity of the vacuum freeze dryer is to automatically control the vacuum degree during the working process of the freeze dryer and monitor the humidity of the items, thereby reducing energy consumption and making it convenient for users to use.

A device for automatically controlling the vacuum degree and humidity of a vacuum freeze dryer, including a control panel, a vacuum gauge, a vacuum valve, a vacuum pump, a liquid crystal screen, and a humidity sensor. Its feature is to control the vacuum pump to start and stop automatically according to the set vacuum degree. The freeze dryer stops working when the humidity reaches the set value.

The device for automatically controlling the vacuum degree and humidity of the vacuum freeze dryer includes a control panel, a vacuum gauge, an automatic control vacuum valve, a vacuum pump, a liquid crystal screen, and a humidity sensor.

The device for automatically controlling the vacuum degree and humidity of the vacuum freeze dryer is controlled by a control panel with a vacuum gauge, a vacuum valve, a vacuum pump, and a humidity sensor.

The device for automatically controlling the vacuum degree and humidity of the vacuum freeze dryer is to set the vacuum degree and humidity through a liquid crystal screen.

The device for automatically controlling the vacuum degree and humidity of the vacuum freeze dryer is to monitor the vacuum degree through a vacuum gauge.

The device for automatically controlling the vacuum degree and humidity of the vacuum freeze dryer maintains the internal vacuum degree by closing the vacuum valve.

The device for automatically controlling the vacuum degree and humidity of the vacuum freeze dryer is that when the vacuum degree is higher than the set value, the vacuum valve and the vacuum pump are automatically opened.

The device for automatically controlling the vacuum degree and humidity of the vacuum freeze dryer is that the vacuum pump and the vacuum valve are automatically closed when the vacuum degree reaches a set value.

The device for automatically controlling the vacuum degree and humidity of the vacuum freeze dryer monitors the humidity value of dried items through a humidity sensor.

The device for automatically controlling the vacuum degree and humidity of the vacuum freeze dryer is that when the humidity reaches the set value, the control system controls the vacuum freeze dryer to stop working.

The beneficial effects of the device for automatically controlling the vacuum degree and humidity of the vacuum freeze dryer are:

1) The vacuum drying time of the vacuum freeze dryer generally exceeds 20 hours. As long as the vacuum degree in the drying barrel meets the working requirements during the working process, the vacuum pump will stop running, reducing the running time of the vacuum pump and saving energy. 2) Add a humidity sensor to avoid users having to experiment repeatedly to find out the drying time, which is very convenient for users to use.

Description of drawings

Figure 1 is a schematic diagram of the device structure for automatically controlling the vacuum degree and humidity of a vacuum freeze dryer.

1-drying barrel; 2-control panel; 3-vacuum gauge; 4-humidity sensor; 5-vacuum valve; 6-cold trap; 7-vacuum pump; 8-drain pipe; 9-drying rack; 10-LCD screen;

detailed description

With reference to Fig. 1, described automatic control vacuum freeze dryer vacuum degree and the device of humidity adopt following technical scheme to realize, and it comprises:

2 - control panel;

3- Vacuum gauge (monitoring the change of vacuum in the cold trap);

4- Humidity sensor (monitors the humidity change in the cold trap);

5-vacuum valve;

6-cold trap;

7- Vacuum pump;

10- LCD screen;

Description of working process:

1) After the vacuum freeze dryer enters the vacuum drying stage, set the vacuum degree required for drying and the final product humidity through the LCD screen (10) as a and b respectively; after the setting is completed, the vacuum pump (7) starts automatically. The change of the vacuum degree inside the cold trap (6) is measured by the vacuum gauge (3). When the vacuum degree reaches a, the vacuum valve (4) will automatically close the vacuum passage to maintain the internal vacuum degree.

2) As the drying progresses, the vacuum degree in the cold trap will gradually increase. When the vacuum degree is higher than a+10, the vacuum valve and vacuum pump will be turned on again. After the vacuum degree reaches a, the vacuum valve and vacuum pump will be closed. This process Continuous cycle.

3) Monitored by the humidity sensor (4), when the humidity of the item reaches the set value b, the freeze dryer stops working and the drying ends.

4) The above-mentioned vacuum pump, vacuum valve, vacuum gauge and humidity sensor are all controlled by the control panel (2).

Claims (2)

1. automatically control the device of vacuum freeze drier vacuum and humidity, comprise the device automatically controlling vacuum freeze drier vacuum and humidity, the device of automatic control vacuum freeze drier vacuum and humidity comprises control panel, and connect the vacuum meter of cold-trap respectively, liquid crystal display and humidity sensor, vacuum meter, liquid crystal display is also connected with control panel respectively with humidity sensor, the vacuum pump pipeline of connection cold-trap is also connected with vacuum valve, described vacuum valve is also connected with control panel, described vacuum meter is for measuring the change of cold-trap internal vacuum, humidity sensor is for monitoring the humidity value of dry goods, whether the device of automatic control vacuum freeze drier vacuum and humidity reaches preset value according to vacuum, control closedown and the unlatching of vavuum pump and vacuum valve, whether setting value is reached according to humidity, control system controls vacuum freeze drier and stops and starting.

2. the device of automatic control vacuum freeze drier vacuum according to claim 1 and humidity, is characterized in that preset value is arranged by liquid crystal display.