Nitrogen rapid cooling vacuum oven

Abstract

The utility model discloses a nitrogen quick cooling vacuum oven, which comprises an oven body and a vacuum pump communicated with the oven body, the oven body is divided into a vacuum oven cavity and a cooling liquid cavity, a circulating fan, a circulating cooler and a container filled with cooling liquid are arranged in the cooling liquid cavity, a cooling pipeline is arranged in the container, and the cooling pipeline is communicated with the vacuum oven cavity. One end of the cooling pipeline is connected with the inlet end of the circulating fan, the other end of the cooling pipeline is respectively connected with the vacuum oven chamber and an external nitrogen source through pipelines, the outlet end of the circulating fan is communicated with the vacuum oven chamber through an air duct, and the container and the circulating cooler form a cooling circulation loop through a pipeline. According to the nitrogen rapid cooling vacuum oven, the nitrogen treated by the cooling liquid is used for circularly cooling the vacuum oven cavity, the cooled nitrogen circulates in the vacuum oven cavity, products can be rapidly cooled, the working efficiency of equipment is improved, the nitrogen protection function can be achieved at the high temperature, and heat sensitive materials are prevented from deteriorating.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum drying materials, in particular to a nitrogen rapid cooling vacuum drying oven. Background Art

[0002] A vacuum oven is a box-type drying equipment that dries the dried material under negative pressure conditions. Its working principle is to use a vacuum pump to extract air and moisture to create a vacuum state in the working chamber, reduce the boiling point of water / organic solvents, and speed up the drying process.

[0003] Conventional vacuum ovens have certain shortcomings. Generally, vacuum ovens cannot dissipate heat quickly when used for too long, which makes the vacuum oven unable to be used continuously. In addition, the long heat dissipation time leads to reduced work efficiency. OLED products are highly sensitive to heat and are easily oxidized and cracked under high-temperature oxygen, which is not conducive to the drying of OLED products. Utility Model Content

[0004] In order to overcome the above problems, improve the working efficiency of the oven, and avoid the deterioration of heat-sensitive materials, the utility model provides a nitrogen rapid cooling vacuum oven, which can achieve rapid cooling of the vacuum oven under the protection of nitrogen.

[0005] The utility model adopts the following technical solutions:

[0006] A nitrogen rapid cooling vacuum oven comprises a box body and a vacuum pump connected to the box body, the box body is divided into a vacuum oven chamber and a cooling liquid chamber, a circulating fan, a circulating cooler and a container filled with cooling liquid are arranged in the cooling liquid chamber, a cooling pipe is installed in the container, one end of the cooling pipe is connected to the inlet end of the circulating fan, the other end of the cooling pipe is respectively connected to the vacuum oven chamber and an external nitrogen source through pipelines, the outlet end of the circulating fan is connected to the vacuum oven chamber through an air duct, and the container and the circulating cooler form a cooling circulation loop through pipelines.

[0007] Furthermore, a cold trap is provided in the cooling liquid chamber, and the cold trap is installed on the connecting pipe between the vacuum oven chamber and the vacuum pump.

[0008] Furthermore, a nitrogen pipe with an air outlet is provided in the vacuum oven chamber, and the nitrogen pipe is arranged on two opposite side walls in the vacuum oven chamber, and the nitrogen pipes on both sides are respectively connected to the outlet ends of the cooling pipe and the air duct.

[0009] Preferably, the cooling pipe located in the container is a coil structure.

[0010] Furthermore, the vacuum oven chamber and the coolant chamber are arranged up and down, and movable universal wheels are installed at the bottom end of the box body.

[0011] Furthermore, the outlet end of the circulating fan is also externally connected to a nitrogen exhaust pipeline, and a one-way check valve is installed on the nitrogen exhaust pipeline.

[0012] Furthermore, the vacuum oven chamber and the coolant chamber are respectively provided with chamber doors, and the vacuum oven chamber is also provided with an observation window.

[0013] The technical solution of the utility model has the following advantages:

[0014] A. The nitrogen rapid cooling vacuum oven provided by the utility model adopts the nitrogen after cooling treatment to circulate and cool the vacuum oven chamber. The cooled nitrogen is continuously cooled and heat exchanged in the vacuum oven chamber, which can quickly cool the product and improve the working efficiency of the equipment. In addition, the nitrogen protection function can be realized at high temperature to prevent the deterioration of heat-sensitive materials.

[0015] B. The utility model further provides a cold trap on the vacuum pumping pipeline. When the vacuum pump is evacuated, the cold trap can quickly condense and collect the solvent. The organic solvent extracted by vacuum is cooled by cold hydrazine, which effectively protects the vacuum pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific implementation methods of the present utility model, the drawings required for use in the specific implementation methods will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is a front view of the vacuum oven provided by the utility model;

[0018] Figure 2 for Figure 1 Shown is the front view of the exterior.

[0019] The following are marked in the figure:

[0020] 1-box body, 11-vacuum oven chamber, 12-coolant chamber; 2-vacuum pump; 3-circulating fan; 4-circulating cooler; 5-container; 6-cooling pipe; 7-air duct; 8-cold trap; 9-nitrogen pipe, 91-air outlet; 10-universal wheel; 20-nitrogen exhaust pipe; 30-one-way check valve; 40-box door; 50-observation window; 60-control panel. DETAILED DESCRIPTION

[0021] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] like Figure 1 and Figure 2As shown, the utility model provides a nitrogen rapid cooling vacuum oven, comprising a box body 1, a control panel 50 and a vacuum pump 2 connected to the box body 1, the box body 1 is divided into a vacuum oven chamber 11 and a coolant chamber 12, a circulating fan 3, a circulating cooler 4 and a container 5 filled with coolant are arranged in the coolant chamber 12, a cooling pipe 6 is installed in the container 5, the container 5 is filled with coolant, the cooling pipe 6 is submerged in the coolant, one end of the cooling pipe 6 is connected to the inlet end of the circulating fan 3, and the other end of the cooling pipe 6 is connected to the vacuum oven chamber 11 and an external nitrogen source through pipelines, independently controlled control valves are respectively arranged on the pipeline connected to the vacuum oven chamber 11 and the pipeline connected to the external nitrogen source, which can control nitrogen injection and nitrogen circulation, the outlet end of the circulating fan 3 is connected to the vacuum oven chamber 11 through the air duct 7, and the container 5 and the circulating cooler 4 form a continuous cooling circulation loop through the pipeline. After the circulation fan 3 is turned on, the external nitrogen source is firstly passed through the pipeline into the cooling pipe 6, and the temperature is lowered under the action of the cooling pipe 6, and then enters the vacuum oven chamber 11 through the circulation fan 3 and the air duct 7. After a certain amount of nitrogen is injected, the nitrogen injection valve is closed and the nitrogen circulation valve is opened, so that the temperature of the vacuum oven chamber 11 can be quickly lowered.

[0025] In order to better protect the vacuum pump, the utility model is also provided with a cold trap 8 in the cooling liquid chamber 12, and the cold trap 8 is installed on the connecting pipe between the vacuum oven chamber 11 and the vacuum pump 2; during the vacuum drying process, the vacuum pipe is connected to the cold hydrazine 8, and when the vacuum pump 2 is evacuated, the cold hydrazine 8 can quickly condense and collect the solvent, effectively protecting the vacuum, 2. After drying the material, the cooling pipe 6 in the cooling liquid chamber 12 is connected to the circulating fan 3 and the air duct 7. The cooled nitrogen is continuously circulated and cooled in the vacuum oven chamber 11 under the drive of the circulating fan 3, which can quickly cool down and improve the working efficiency of the equipment. The cooling pipe 6 located in the container 5 is preferably a coil structure.

[0026] The utility model further provides a nitrogen pipe 9 with an air outlet in the vacuum oven chamber 11. The nitrogen pipe 9 is provided on opposite side walls in the vacuum oven chamber 11, and the nitrogen pipes 9 on both sides are respectively connected to the outlet ends of the cooling pipe 6 and the air duct 7. The circulating fan 3 injects the nitrogen cooled by the coolant from one side of the vacuum oven chamber 11. The injected nitrogen flows from one end of the vacuum oven chamber 11 to the other end, then enters the nitrogen pipe 9 at the other end, and flows back to the cooling pipe 6 for cooling, and then is injected into the vacuum oven chamber through the circulating fan for a new cycle. Under the action of the circulating cooler 4, the coolant in the container maintains a relatively constant temperature, so as to facilitate the heat exchange of the reflux nitrogen and improve the cooling efficiency of the vacuum oven chamber 11.

[0027] like Figure 1As shown, the utility model preferably sets the vacuum oven chamber 11 and the coolant chamber 12 as a top-bottom structure, and a movable universal wheel 10 is installed at the bottom of the box body 1 for easy movement. Box doors 40 can also be installed on the vacuum oven chamber 11 and the coolant chamber 12, respectively, and an observation window 50 is also provided on the box door 40 on the vacuum oven chamber 11 for easy observation of the baking material.

[0028] The utility model can also discharge the injected nitrogen in the vacuum oven chamber through the circulating fan 3, that is, the outlet end of the circulating fan is externally connected to a nitrogen exhaust pipeline 20, and a one-way check valve 30 is installed on the nitrogen exhaust pipeline 20. When it is necessary to discharge, it is only necessary to open the one-way check valve 30, and at the same time close the valve entering the air duct, and the circulating fan directly sucks the nitrogen in the vacuum oven chamber and discharges it. Of course, the discharge of nitrogen can also be achieved by directly using a vacuum pump, which will not be repeated here.

[0029] The specific operation is as follows:

[0030] Turn on the vacuum pump, open the vacuum valve through the control panel, heat, and collect the organic solvent extracted by vacuum during the baking process; when the baking is completed, close the vacuum valve, open the valve of the external nitrogen source to introduce nitrogen, and the nitrogen is cooled through the cooling pipe, and then enters the air duct through the circulating fan and is discharged into the nitrogen pipeline, and then enters the vacuum oven chamber through its upper air port 91; the circulating nitrogen returns to the circulating fan and the nitrogen pipeline from the air port 91 on the other side and enters a new cycle. After repeated cycles, the vacuum oven chamber is quickly cooled.

[0031] Anything not described in the present invention is applicable to the prior art.

[0032] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the present utility model.

Claims

1. A nitrogen rapid cooling vacuum oven, comprising a box (1) and a vacuum pump (2) connected to the box (1), characterized in that: The housing (1) is divided into a vacuum oven chamber (11) and a cooling liquid chamber (12). A circulating fan (3), a circulating cooler (4) and a container (5) filled with cooling liquid are arranged in the cooling liquid chamber (12). A cooling pipe (6) is installed in the container (5). One end of the cooling pipe (6) is connected to the inlet end of the circulating fan (3). The other end of the cooling pipe (6) is connected to the vacuum oven chamber (11) and an external nitrogen source through pipelines. The outlet end of the circulating fan (3) is connected to the vacuum oven chamber (11) through an air duct (7). The container (5) and the circulating cooler (4) form a cooling circulation loop through pipelines.

2. The nitrogen rapid cooling vacuum oven according to claim 1, characterized in that: A cold trap (8) is also provided in the cooling liquid chamber (12), and the cold trap (8) is installed on the connecting pipe between the vacuum oven chamber (11) and the vacuum pump (2).

3. The nitrogen rapid cooling vacuum oven according to claim 2, characterized in that: A nitrogen pipeline (9) with an air outlet is provided in the vacuum oven chamber (11), and the nitrogen pipeline (9) is arranged on two opposite side walls in the vacuum oven chamber (11), and the nitrogen pipelines (9) on both sides are respectively connected to the outlet ends of the cooling pipeline (6) and the air duct (7).

4. The nitrogen rapid cooling vacuum oven according to claim 1, characterized in that: The cooling pipe (6) located in the container (5) is a coil structure.

5. The nitrogen rapid cooling vacuum oven according to any one of claims 1 to 4, characterized in that: The vacuum oven chamber (11) and the cooling liquid chamber (12) are arranged vertically, and a movable universal wheel (10) is installed at the bottom end of the box body (1).

6. The nitrogen rapid cooling vacuum oven according to claim 5, characterized in that: The outlet end of the circulating fan (3) is also externally connected to a nitrogen exhaust pipeline (20), and a one-way check valve (30) is installed on the nitrogen exhaust pipeline (20).

7. The nitrogen rapid cooling vacuum oven according to claim 1, characterized in that: The vacuum oven chamber (11) and the coolant chamber (12) are respectively provided with chamber doors (40), and the vacuum oven chamber (11) is also provided with an observation window (50).

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