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Vacuum drying oven and working method thereof

A technology of vacuum oven and working method, which is applied in the direction of drying, drying machine, local stirring dryer, etc., which can solve the problems affecting product quality and vacuum degree drop, and achieve the effect of reliability and stability

Inactive Publication Date: 2019-11-05
南通江海储能技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If there are products in one layer of ovens that are in automatic operation, and they are just supplementing the vacuum to reach the set threshold, then the other layers of ovens start to evacuate from 0kPa. Since the two valves are all open, the two layers of ovens are connected. Yes, at this time the high vacuum layer of the oven will enter the air, resulting in a sudden drop in vacuum, and moisture will enter the product, affecting product quality

Method used

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  • Vacuum drying oven and working method thereof
  • Vacuum drying oven and working method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0017] see figure 1 , one dry vacuum pump 3 connected to three ovens, one oven has three layers, W1, W2, W3, W4, W5, W6, W7, W8, W9 represent each layer of ovens, each of W1-W9 ovens Vacuum valve 1 is controlled by a PLC control system 2. When any vacuum valve 1 in W1-W9 is opened to work, other operations need to be performed after the vacuuming of the oven on this layer is completed;

[0018] see figure 2 , to set the vacuum instrument, press the MODE key to display lo-1, press the ↑, ↓ key to set the required vacuum degree, press the MODE key again to display hi-1, press the ↑, ↓ key to set the required minimum vacuum degree , when the value is lower than this value, the valve will be automatically opened and vacuumed to the vacuum value set by lo-1; press the MODE key once again, and lo-2 will be displayed, press the ↑ and ↓ keys to set the vacuum degree that needs to be maintained after the project is completed, and then press the MODE key Once, hi-2 is displayed, pres...

Embodiment 2

[0021] The vacuum gauge L0-1 of each layer of oven W1-W9 is set to -98kPa, Hi-1 is set to -95kPa, L0-2 is set to -96kPa, and Hi-2 is set to -92kPa. Assuming that W1 is pressed to run automatically at this time, W1 will start heating and vacuuming at the same time, and the vacuuming will not stop until -98kPa. If W2 is already running at this time, and the vacuum degree of W2 drops below -95kPa, it needs to be vacuumed. At this time, the PLC sends a command to wait for W2 to vacuumize. If W3-W9 is also in the same situation as W2, then wait for vacuuming according to the order in which the ovens on each layer drop below -95kPa.

Embodiment 3

[0023] The vacuum gauge L0-1 of each layer of oven W1-W9 is set to -98kPa, Hi-1 is set to -95kPa, L0-2 is set to -96kPa, and Hi-2 is set to -92kPa. Assuming that W2 is already running, the vacuum degree has dropped below -95kPa, and it is being vacuumed to make the vacuum degree reach above -95kPa. At this time, press W1 to automatically run, and the PLC will issue a command to W1 to vacuumize and wait until the vacuum degree of W2 reaches above -95kPa. Execute the W1 vacuum command after the display shows that the pumping has stopped.

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Abstract

The invention discloses a vacuum drying oven and a working method thereof. The vacuum drying oven comprises a dry type vacuum pump and at least three drying oven bodies, wherein each drying oven bodycomprises 2-4 layers, a vacuum valve is arranged on an air outlet of each layer, and each three vacuum valves are connected with a PLC control system. The method is characterized in that the vacuum degree required to be achieved is set through a vacuum instrument on the dry type vacuum pump, then the lowest vacuum degree required to be achieved is set, and when the vacuum degree is lower than thelowest vacuum degree, the vacuum valves are automatically opened to vacuumize to the set vacuum value; and then the vacuum degree required to be kept after the engineering is finished and the lowest vacuum degree required to be kept after the engineering is finished are set. According to the vacuum drying oven and the working method thereof, it is ensured that each layer of the drying oven bodiesis not influenced by the vacuum state and the operation state of the rest of the drying oven bodies in the vacuumized state, vacuumizing of any one layer of drying oven body can be ensured to be carried out orderly according to a set program, vacuumizing is automatically completed according to the logic and the sequence, the reliability and the stability are achieved, and the product quality is not influenced.

Description

technical field [0001] The invention relates to the technical field of vacuum ovens, in particular to a vacuum oven and its working method. Background technique [0002] At present, the vacuum drying ovens on the market all press the vacuum button to immediately execute the program to start vacuuming. The defect is that when several layers of ovens are vacuuming at the same time, the valves are all open. At this time, the air in the low-vacuum oven It will enter the high-vacuum oven, which will affect the product quality in the high-vacuum oven. [0003] The existing vacuum drying ovens all work independently, including an oven and a vacuum pump. Whether it is manual mode click vacuuming or automatic air pumping during automatic operation, it is executed immediately without waiting. If there are products in one layer of ovens that are in automatic operation, and they are just supplementing the vacuum to reach the set threshold, then the other layers of ovens start to evacua...

Claims

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Application Information

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IPC IPC(8): F26B9/06F26B5/04F26B25/00
CPCF26B5/044F26B9/06F26B25/00
Inventor 汤红彬于强杜林姜汉斌杨恩东邵国柱李斌
Owner 南通江海储能技术有限公司
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