CN209479202U - Prevent the oven device of ink volatilised particles contamination heater - Google Patents

Abstract

The utility model provides a kind of oven device for preventing ink volatilised particles contamination heater, it is formed in the oven including a heating chamber, the heating chamber is simultaneously connected to an air inlet end and an exhaust end set in the oven, make the recirculating air flow that baking object is generated in the heating chamber, an air inlet runner is arranged between the air inlet end and the heating chamber, and the heater configuration, in the air inlet runner, which first contacts the heater via the extraneous normal temperature air of air inlet end guiding and becomes hot-air and just import in the heating chamber later.In this way, improve tradition because normal temperature air directly contact the recirculating air flow in oven make ink volatilised particles contamination heater the problem of.

Description

Prevent the oven device of ink volatilised particles contamination heater

Technical field

The utility model relates to Roasting oven structures, prevent the roasting of ink volatilised particles contamination heater in particular to a kind of Case apparatus.

Background technique

The targeted oven of the utility model, it is intended that industrial oven especially has been coated with for baking volatile The oven that the object of particle coating uses.In current industry, such as printed circuit board (Printed is made producing Circuit board, abbreviation PCB) such object process, generally can be by processing procedures such as ink coating, drying, baking, cleanings. Wherein, the wet ink that coating on printed circuit board is exactly toasted using the hot temperature that oven generates, enables wet ink to consolidate Change and stable is attached on printed circuit board.

Since wet ink is during oven inscribed heated temperature baking, it can volatilize and generate small ink particle, it is described These volatilization generate ink particles the heater in oven can be impacted.

Further, please refer to Fig. 1 and Fig. 2, citing discloses the structure of two conventional oven, is illustrated in tradition Heating chamber 11a, 11b for toasting object (such as printed circuit board), oven are all respectively formed in oven 10a, 10b Air inlet end 12a, 12b and exhaust end 13a, 13b of connection heating chamber 11a, 11b, normal temperature air warp are additionally provided in 10a, 10b It is imported in heating chamber 11a, 11b by air inlet end 12a, 12b and is mixed with recirculating air flow, be equipped with and be used in heating chamber 11a, 11b Heat cycles distinguished and admirable heater 20a, 20b, by heater 20a, 20b heating and make normal temperature air become hot-air, heat Air the inscribed driving by wind wheel 30a, 30b of heating chamber 11a, 11b generate baking object recirculating air flow 16a, 16b, and recirculating air flow 16a, 16b are emitted into the external world via exhaust end 13a, 13b.

Further, when being coated with the object (such as printed circuit board) of wet ink in heating chamber 11a, 11b When interior baking, the contained volatile solvent of tool of ink can volatilize because of the high temperature in heating chamber 11a, 11b；For example, with The general 150 DEG C ink for solidification temperature, ink particle usually starts to volatilize at 80 DEG C or so, to 120 DEG C or so oil Black particle can generate the maximum amount of volatilization, therefore the object for being coated with wet ink receives heater in heating chamber 11a, 11b 20a, 20b are baked in 150 DEG C of cured printing ink temperature of baking process by room temperature, the temperature especially as heating chamber 11a, 11b When degree reaches 80 DEG C~150 DEG C of sections, i.e. will form ink volatilised particles intersperses among heating chamber to the wet ink of object surface In 11a, 11b, recirculating air flow 16a, 16b that 11a, 11b are used to toast object in heating chamber will drive the ink volatilised particles The external world is emitted into after filtering via exhaust end 13a, 13b.

However, problem is, when normal temperature air is via in air inlet end 12a, 12b injection heating chamber 11a, 11b, often Warm air can directly impact and touch recirculating air flow 16a, 16b, since the temperature of recirculating air flow 16a, 16b are (about at 80 DEG C Between~150 DEG C) it is much higher than normal temperature air (for 25 DEG C), so that being formed between recirculating air flow 16a, 16b and normal temperature air Sizable temperature difference forces the temperature of recirculating air flow 16a, 16b also to decline therewith, in the case, recirculating air flow 16a, 16b institute The ink volatilised particles of drive are condensed because of the rapid drawdown of temperature, and then are infected with (or sticky) in adding with many venting flow paths In hot device 20a, 20b.Especially notably, it when ink volatilised particles accompanying in heater 20a, 20b are excessive, influences whether to add The effect of hot device 20a, 20b release thermal energy even be easy to cause the hot stasis of blood product of heater 20a, 20b and is damaged, causes fire eventually The generation of calamity.In order to avoid the generation of this phenomenon, dealer often must clean or replace heater 20a in oven 10a, 10b, 20b, but have resulted in the puzzlement in plant maintenance.

Therefore, how to improve ink volatilised particles in conventional oven and be infected with heater, becoming has skill to be overcome for one Art problem.

Utility model content

In view of this, the utility model technical task to be solved is: the heating chamber for improving conventional oven is indoor The structure of airflow channel designs, so that ink volatilised particles are not easy to contamination heater, to extend the service life of heater.

For this purpose, the utility model provides the device for preventing ink volatilised particles contamination heater in a kind of oven, comprising: one Heating chamber is formed in the oven, which is simultaneously connected to an air inlet end and an exhaust end set in the oven, is made A recirculating air flow of baking object is generated in the heating chamber；One air inlet runner is arranged in the air inlet end and the heating chamber Between, and the heater configuration, in the air inlet runner, the air inlet runner is first via the extraneous normal temperature air of air inlet end guiding It contacts the heater and becomes hot-air and just import in the heating chamber later.

In further implement, which directly contacts the heater.

In further implement, the wind wheel of the recirculating air flow is formed in the heating chamber configured with a driving hot-air.Its In the wind wheel be seated between the air inlet end and the exhaust end.

In further implement, which is configured with an air blower, which forces from the extraneous normal temperature air that extracts It imports in the air inlet runner.

According to above-mentioned apparatus, the producible technical effect of the utility model is: being heated as heat by normal temperature air Heating chamber is just imported after air, normal temperature air is made directly not contact the recirculating air flow in oven and lead to recirculating air flow Temperature decrease is avoided that ink volatilised particles are attached to heater because of condensation, can effectively improve ink in conventional oven and wave The problem of hair particle becomes easily infected by heater.

It in addition to this, will be in subsequent specific implementation in relation to the utility model for the relevant technical details implemented accordingly It is illustrated in mode and schema.

Detailed description of the invention

Fig. 1 is the cut-away view of conventional tunnel formula oven.

Fig. 2 is the cut-away view of traditional box oven.

Fig. 3 is the flow chart of the utility model step method.

Fig. 4 is step S1 shown in implementing Fig. 3 to oven basic framework figure needed for S3.

Fig. 5 is the cut-away view of the utility model first item tunnel type baking oven embodiment.

Fig. 6 is the action schematic diagram of Fig. 5.

Fig. 7 is the cut-away view of the utility model second item box oven embodiment.

Fig. 8 is the action schematic diagram of Fig. 7.

Description of symbols: 10a, 10b, 10c, 10d, 10e- oven；101- inner housing；102- outer housing；103- is heat-insulated Layer；11a, 11b, 11d, 11e- heating chamber；12a, 12b, 12c, 12d, 12e- air inlet end；13a, 13b, 13d- exhaust end；14- Airflow channel；15- deflector；16a, 16b, 16c, 16d, 16e- recirculating air flow；17c, 17d, 17e- air inlet runner；18d,18e- Partition；20a, 20b, 20c, 20d, 20e- heater；30a, 30b, 30d- wind wheel；31- motor；40- air blower；S1 to S3- is real The step of applying explanation.

Specific embodiment

Referring to Fig. 3, the explanation oven device provided by the utility model for preventing ink volatilised particles contamination heater It is that can be easily carried out by a kind of method for preventing ink volatilised particles to be infected with heater in oven, is prevented in the oven The method that ink volatilised particles are infected with heater, including sequentially execute the following steps S1 to S3:

Step S1: interval normal temperature air and recirculating air flow；

Referring to Fig. 4, an air inlet runner 17c, air inlet runner 17c and air inlet end 12c phase is arranged in explanation in oven 10c Connection, extraneous normal temperature air are sequentially imported in oven 10c by air inlet end 12c, air inlet runner 17c, and heater 20c is It is configured in air inlet runner 17c, normal temperature air elder generation contact heater 20c is made to contact the recirculating air flow 16c in oven 10c again, enable Normal temperature air can not directly contact the recirculating air flow 16c in oven 10c, be avoided that the recirculating air flow 14c in oven 10c because straight It touches normal temperature air and declines temperature.

Step S2: heating normal temperature air

Referring to Fig. 4, illustrates that normal temperature air is to first pass through being heated as after hot-air of heater 20c, just connect The recirculating air flow 16c in oven 10c is touched, therefore is avoided that the temperature decline of recirculating air flow 16c.Further, heater 20c It is provided in oven 10c and heats normal temperature air, be avoided that normal temperature air after oven 10c external heat becomes hot-air, is being led Cooling loss thermal energy phenomenon or demand additional utilidor or heat preservation runner occur during entering in oven 10c, It can introduce heated air into oven 10c and cause the burden of device structure.

Step S3: contact recirculating air flow；

Referring to Fig. 4, illustrates that air inlet end 12c enters in oven 10c from extraneous enforced guiding normal temperature air, make room temperature Air contacts recirculating air flow 16c by heater 20c, and generated wind pressure when entering in oven 10c by normal temperature air, with It excludes the recirculating air flow 16c in oven 10c and reversely flows into air inlet runner 17c and Direct Contact Heating device 20c, be avoided that circulated air The ink volatilised particles contamination heater 20c that stream 16c is driven.

On the other hand, please refer to Fig. 5 and Fig. 6, illustrate that the first item of the oven device of the utility model is preferably implemented Example, illustrates to implement the utility model on a kind of tunnel type baking oven.The taken off structure of Fig. 5 and Fig. 6, it is revealed in addition to including Fig. 4 Except basic framework, an a heating chamber 11d and air inlet runner 17d is further comprised.Wherein:

Heating chamber 11d is formed in oven 10d, and oven 10d includes an inner housing 101 and packet on the implementation An outer housing 102 of the inner housing 101 is covered, heating chamber 11d is formed in the inner housing 101.The inner housing 101 with should The thermal insulation layer 103 of a tool heat insulation effect is provided between outer housing 102.Further, connection is provided in oven 10d should An air inlet end 12d and an exhaust end 13d of heating chamber 11d makes extraneous normal temperature air enter heating chamber via air inlet end 12d It in the 11d of room, then leaves via exhaust end 13d, and then generates a recirculating air flow 16d.Further, heating chamber 11d It is interior to be equipped with number of guide plate 15, an airflow channel 14 is constituted in heating chamber 11d by deflector 15, which is It is connected with air inlet end 12d and exhaust end 13d, recirculating air flow 16d is flowed in heating chamber 11d along airflow channel 14.

It is provided with the heater 20d of an electrothermal in heating chamber 11d, makes normal temperature air adding via heater 20d Heat and become hot-air.Be also configured with a wind wheel 30d in heating chamber 11d, wind wheel 30d be located in air inlet end 12d with In circulation road 14 between exhaust end 13d.Axis connects a motor 31 to wind wheel 30d on the implementation, and wind wheel 30d is via motor 31 It drives and rotates, the rotation of wind wheel 30d can be relied on and the hot-air in heating chamber 11d is driven to flow along airflow channel 14, made Hot-air leaves heating chamber 11d via exhaust end 13d, and then generates the recirculating air flow 16d of baking object.

Air inlet runner 17d is arranged between air inlet end 12d and heating chamber 11d, air inlet runner 17d be with Airflow channel 14 is connected, and extraneous normal temperature air is imported in heating chamber 11d via air inlet end 12d by air inlet runner 17d. Further, heater 20d is arranged in air inlet runner 17d, extraneous normal temperature air be first contact heater 20d and It is just imported in heating chamber 11d later as hot-air.

Air inlet runner 17d is via an at least partition 18d on the implementation in being spaced formation in heating chamber 11d, should The normal temperature air that partition 18d can be spaced air inlet end 12d directly contacts the recirculating air flow 16d in heating chamber 11d, also can between Every the recirculating air flow 16d Direct Contact Heating device 20d in heating chamber 11d, in this way, in addition to being avoided that heating chamber 11d Interior recirculating air flow 16d directly contacts and maintains the temperature of recirculating air flow 16d with normal temperature air, moreover it is possible to avoid recirculating air flow 16d The ink volatilised particles contamination heater 20d driven.Further, air inlet end 12d is configured with an air blower 40, the drum Blower 40 is forced to import in air inlet runner 17d from the extraneous normal temperature air that extracts, and being greater than the air pressure in air inlet runner 17d should Air pressure in heating chamber 11d, the recirculating air flow 16d being avoided that in heating chamber 11d reversely flow into air inlet runner 17d It is interior.

In addition, illustrating the second item preferred embodiment of the oven device of the utility model please refer to Fig. 7 and Fig. 8, saying It is bright to implement the utility model on a kind of box oven, the difference of the present embodiment and first item embodiment be in: the two enters The difference of position is arranged in gas end 12d, 12e, and wherein the air inlet end 12d of first item embodiment is the side that oven 10d is arranged, this reality The air inlet end 12e for applying example is the top that oven 10e is arranged.Although set position is different by air inlet end 12d, 12e of the two, The room temperature that air inlet end 12d, 12e can be avoided to be imported by air inlet runner 17d, 17e of the be spaced formation of partition 18d, 18e is empty Recirculating air flow 16d, 16e in gas Direct Contact Heating chamber 11d, 11e, and then maintain the circulation in heating chamber 11d, 11e The temperature of distinguished and admirable 16d, 16e, the problem of ink volatilised particles can be effectively prevent to be infected with heater 20d, 20e because of condensation.

It is described above to be merely exemplary for the utility model, and not restrictive, those of ordinary skill in the art Understand, without departing from the spirit and scope defined by the claims, can many modifications may be made, variation or it is equivalent, but It falls within the protection scope of the utility model.

Claims (5)

1. a kind of oven device for preventing ink volatilised particles contamination heater, it is characterized in that including:

One heating chamber is formed in the oven, which is connected to an air inlet end and an exhaust set in the oven End makes the recirculating air flow that baking object is generated in the heating chamber；

One air inlet runner is arranged between the air inlet end and the heating chamber, and the heater configuration is somebody's turn to do in the air inlet runner Air inlet runner first contacts the heater via the extraneous normal temperature air of air inlet end guiding and just importing should later as hot-air In heating chamber.

2. preventing the oven device of ink volatilised particles contamination heater as described in claim 1, it is characterised in that: the inlet air flow The road interval recirculating air flow directly contacts the heater.

3. preventing the oven device of ink volatilised particles contamination heater as described in claim 1, it is characterised in that: the heating chamber Interior forms the wind wheel of the recirculating air flow configured with a driving hot-air.

4. preventing the oven device of ink volatilised particles contamination heater as claimed in claim 3, it is characterised in that: the wind wheel is sat It falls between the air inlet end and the exhaust end.

5. preventing the oven device of ink volatilised particles contamination heater as described in claim 1, it is characterised in that: the air inlet end Configured with an air blower, which forces to import in the air inlet runner from the extraneous normal temperature air that extracts.