CN210845936U

CN210845936U - Oven capable of discharging harmful gas

Info

Publication number: CN210845936U
Application number: CN201921117025.4U
Authority: CN
Inventors: 郝敬虹; 李秉妍; 马昊
Original assignee: Beijing University of Agriculture
Current assignee: Beijing University of Agriculture
Priority date: 2019-07-17
Filing date: 2019-07-17
Publication date: 2020-06-26
Anticipated expiration: 2029-07-17

Abstract

The utility model discloses a drying oven capable of discharging harmful gas, which comprises a box body, a heater and a control unit; the heater is arranged at the bottom of the inner cavity of the box body; the upper part of the side wall of the inner cavity of the box body is provided with a plurality of exhaust fans, and the output ports of the exhaust fans are connected with the air inlets of the side wall parts through pipelines; the pipeline is connected with an adsorption device and an air pressure balance valve in series, and the air pressure balance valve is close to the air inlet. The oven absorbs harmful gas generated after high-temperature baking and other gases which have influences on the experimental environment through the adsorption device provided with the adsorbent; the experimental environment is purified; the air pressure balance valve, the exhaust fan and the damper are matched to generate micro negative pressure in the oven, so that the leakage of air in the oven is further reduced.

Description

Oven capable of discharging harmful gas

Technical Field

The utility model relates to a laboratory paraphernalia specifically is an oven.

Background

In a laboratory, an oven is a common device and is generally used for drying, melting wax and sterilizing, however, in the experiment, gas emitted by certain materials or reagents is often harsh and even harmful to human bodies and the environment, for example, when paraffin sections are made, the oven is uncovered and evaporated for one hour at 60 ℃ the next day after wax immersion, so that xylene is volatilized, the xylene has medium toxicity and has stimulation on eyes and upper respiratory tracts, and the xylene has anesthesia effect on a central system at high concentration. The eye and upper respiratory tract obvious irritation symptom, dizziness, headache, nausea, chest distress and other symptoms can be caused by the absorption of high concentration dimethylbenzene in a short time, and the neurasthenia syndrome can also cause female abnormal menstruation after long-term contact.

In addition, drying of plant materials such as garlic also produces unpleasant odors.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an oven which has novel and unique structure, convenient use and environmental friendliness; the specific technical scheme is as follows:

an oven comprises a box body, a heater and a control unit; the heater is arranged at the bottom of the inner cavity of the box body; the upper part of the side wall of the inner cavity of the box body is provided with a plurality of exhaust fans, and the output ports of the exhaust fans are connected with the air inlets of the side wall parts through pipelines; the pipeline is connected with an adsorption device and an air pressure balance valve in series, and the air pressure balance valve is close to the air inlet.

Furthermore, activated carbon is filled in the adsorption device to be used as an adsorption material.

Furthermore, the front of the box body is provided with an opening, and two layers of sealing doors are arranged at the opening.

Further, the sealing door is a glass door.

Further, a damper is arranged between the air pressure balance valve and the air inlet.

The oven absorbs harmful gas generated after high-temperature baking and other gases which have influences on the experimental environment through the adsorption device provided with the adsorbent; the experimental environment is purified; the air pressure balance valve, the exhaust fan and the damper are matched to generate micro negative pressure in the oven, so that the leakage of air in the oven is further reduced.

Drawings

FIG. 1 is a front view of the structure of the oven of the present invention;

fig. 2 is a schematic plan view of the structure of the oven of the present invention.

In the figure: 1. a box body; 2. A heater; 3. an air outlet; 4. An exhaust fan; 5. A pipeline; 6. an air inlet; 7. an adsorption device; 8. a pressure balancing valve; 9. a damper; 10. a sealing door; 11. a heat-insulating layer; 12. an operation panel; 13. a pipe connector.

Detailed Description

The present invention will be more fully described with reference to the following examples. The present invention may be embodied in many different forms and should not be construed as limited to the exemplary embodiments set forth herein.

For ease of description, spatially relative terms, such as "upper," "lower," "left," "right," and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatial terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "lower" can encompass both an upper and a lower orientation. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

As shown in fig. 1, the oven in this embodiment includes a box 1, a heater 2, and a control unit (not shown in the figure); the heat preservation layer 11 is arranged in the box body 1, and heat dissipation is reduced. The heater 2 is arranged at the bottom of the inner cavity of the box body 1; the upper part of the side wall of the inner cavity of the box body 1 is provided with a plurality of air outlets 3, the outer wall is provided with an exhaust fan 4 at the position corresponding to each air outlet, and the output port of each exhaust fan 4 is connected with an air inlet 6 of the side wall part through a pipeline 5; the pipeline 5 is connected with an adsorption device 7 and an air pressure balance valve 8 in series, and the air pressure balance valve 8 is close to the air inlet 6. The exhaust fan 4 is connected with the pipeline 5 through a pipe connector 13; sealing rings are arranged between the exhaust fan 4 and the box body 1 and between the exhaust fan 4 and the pipe connector 13, so that gas leakage is reduced.

An adsorption cycle kit formed by the exhaust fan 4, the pipe connector 13, the adsorption device 7, the air pressure balance valve 8 and the pipeline 5 can be installed on the outer wall of the left side or the right side; or can be arranged on the left side and the right side.

A sensor of the control unit measures the temperature of the inner cavity of the box body 1; the power of the heater 2 is controlled according to the feedback of the sensor and the set temperature, so that the temperature in the oven is stable. During the baking process, harmful or odorous gases may be generated due to high temperature. The exhaust fan 4 arranged on the air outlet 3 pumps out the air in the oven, and after being adsorbed by the adsorption device 7, the air basically does not contain harmful gas and returns to the oven from the air inlet. The air pressure balance valve 8 is a switch valve with one end connected with the air pipe and the other end communicated with the atmosphere; when the valve is closed, the air pipe is closed; when opened, the air pipe is communicated with the atmosphere. Because the gas in the oven is recycled, the high-temperature gas is basically not lost, and the energy efficiency of the oven is improved.

The adsorption device 7 is filled with active carbon as an adsorption material. The concentration of harmful components in the gas in the oven can be effectively reduced through adsorption, and the harm caused by gas leakage in the oven is reduced.

As shown in fig. 2 (the external adsorption cycle kit is omitted in the figure), the front of the box body 1 is opened, and two layers of sealing doors 10 are arranged at the opening; the edges of the sealing door are all provided with high-temperature resistant rubber sealing rings. The rubber sealing ring is matched with the inner edge of the corresponding cavity, and the sealing effect is good. Two layers of sealing doors are used, so that the sealing effect is better, and the leakage of harmful gas is avoided as much as possible.

The sealing door 10 is a glass door; the condition inside the oven is conveniently observed.

A damper 9 can be arranged between the air pressure balance valve 8 and the air inlet; an air pressure difference of less than one tenth of an atmosphere is generated by the damper 9; to ensure that the air pressure in the oven is lower than the atmospheric pressure; and harmful gas in the oven is prevented from leaking.

The heater 2 may employ a heating rod as a heating member; the axial direction of the heating rod is vertical to the air inlet, so that the heating air flow in the oven is more uniform. And a grid can be arranged at the air inlet, so that air inlet is more uniform, and heating airflow in the oven is improved.

The inner cavity of the oven is divided into a heating area and a baking area by a horizontal clapboard with a through hole; a heating zone is arranged below the horizontal partition plate, and the heater 2 is arranged in the heating zone; the air inlet 6 is arranged on the side wall of the heating area. The hot air after adsorption treatment enters the heating area from the air inlet 6, is heated by the heater 2 and then enters the baking area from the through hole to bake the material on the baking frame (not shown in the figure).

The operation panel of the control unit is arranged at the top of the oven body 1 of the oven; the operation of bending down is not needed, and the experience is better. It may also be provided as a reversible structure, such as a hinged structure. After overturning, the operation panel is forward, when the position that the oven was placed was higher, convenient operation and observation temperature reading from the front.

The oven in the embodiment absorbs harmful gases generated after high-temperature baking and other gases influencing the experimental environment through the adsorption device provided with the adsorbent; the experimental environment is purified; the air pressure balance valve, the exhaust fan and the damper are matched to generate micro negative pressure in the oven, so that the leakage of air in the oven is further reduced.

The above examples are only for illustrating the present invention, and besides, there are many different embodiments, which can be conceived by those skilled in the art after understanding the idea of the present invention, and therefore, they are not listed here.

Claims

1. An oven comprises a box body, a heater and a control unit; the heater is arranged at the bottom of the inner cavity of the box body; the air-conditioning box is characterized in that a plurality of exhaust fans are arranged on the upper part of the side wall of the inner cavity of the box body, and the output ports of the exhaust fans are connected with the air inlets of the side wall parts through pipelines; the pipeline is connected with an adsorption device and an air pressure balance valve in series, and the air pressure balance valve is close to the air inlet.

2. The oven according to claim 1, characterized in that the adsorption device is filled with activated carbon as an adsorbent.

3. The oven according to claim 1, characterized in that the front of the cabinet is open, and two layers of sealing doors are arranged at the opening.

4. The oven of claim 3, wherein the sealed door is a glass door.

5. The oven of claim 1, wherein a damper is disposed between the air pressure balancing valve and the air inlet.