CN210441562U - Drawer type drying device and production line comprising same - Google Patents

Abstract

The utility model discloses a drawer type drying device and a production line containing the same, which can be used as special drying equipment of an electrostatic sensitive electronic device, and comprises a drying box body, wherein one or more groove bodies are arranged in the drying box body, and a plurality of drawers are arranged in the one or more groove bodies; each tank body is independently provided with a heating temperature control system to realize layered temperature control; in addition, a single-drawer timing design mode is adopted; through the design, the requirements of drying temperature and time of different electronic devices and the requirements of batch production can be considered; in addition the utility model discloses a drying device has still increased environmental protection function on the basis of above-mentioned branch steamer tray formula, makes the emission reach relevant regulation requirement, and guarantee operating personnel is healthy, is suitable for popularization and application.

Description

Drawer type drying device and production line comprising same

Technical Field

The utility model relates to a drying equipment field especially relates to a drawer type environment-friendly drying device and contain its production line.

Background

Aiming at electronic devices, a common oven is generally adopted for drying at present, the common oven generally has only one box body, the electronic devices generally have the characteristics of small volume and multiple varieties, and related international and domestic industry standards stipulate that different electronic devices have different drying temperatures and drying times. Therefore, the existing drying device can not meet the requirements of drying different devices on temperature, time and batch production.

Secondly, a single precise electronic component is made of various materials such as metal and nonmetal, and in the process of heating from room temperature to the set drying temperature, because the thermal expansion coefficients of the metal and nonmetal materials are very different, the precise component is easily physically damaged due to the fact that the heating speed of a common oven which is not controlled by the heating speed is too high or the temperature control deviation is large, and the electrical performance is invalid or the reliability is reduced.

In addition, the static-sensitive electronic device includes: resistors, capacitors, potentiometers, electron tubes, radiators, electromechanical elements, connectors, semiconductor discrete devices, electroacoustic devices, laser devices, electronic display devices, photoelectric devices, sensors, power supplies, switches, micro-motors, electronic transformers, relays, printed circuit boards, integrated circuits, various circuits, and the like, wherein the devices are made of various organic and inorganic materials, such as common metal materials including gold, silver, copper, tin, lead, magnesium, nickel, palladium, lithium, titanium, cadmium, chromium, niobium, tantalum, tungsten, molybdenum, gallium, indium, and the like, and chemical materials including VOCs (volatile organic compounds), formaldehyde, benzene, toluene, xylene, glycol ether solvents, TDI (toluene diisocyanate), phthalate plasticizers, VOCs (volatile organic compounds), alcohols, aldehydes, ethers, benzene, alkanes, and the like; in particular to various chemical adhesives and paint organic materials which are applied in the process of bonding and encapsulating in the manufacturing process of an electronic circuit board assembly (PCBA), and the materials contain various substances harmful to human bodies. Before electronic components in the electrical industry are welded, drying and dehumidification are required, after PCBA is manufactured, cleaning is carried out, liquid chemical materials are used for carrying out three-proofing coating and encapsulation on PCBA, drying or heating and curing are required, the drying temperature is different from 40-200 ℃, harmful substances contained in the metal or nonmetal materials can be quickly volatilized in a large quantity, the indoor environment and the outdoor environment are polluted, and the human health is greatly injured.

Therefore, when the conventional drying device is used for drying the static sensitive electronic devices or the common precise electronic devices, inconvenience and danger still exist, and further improvement is needed. How to create a special drying device for electrostatic sensitive electronic devices (components, parts and the like) can avoid thermal expansion damage of devices made of different materials caused by over-quick temperature rise of precise electronic devices on one hand, and on the other hand, the special drying device can meet different drying requirements and batch production requirements, and can purify toxic and harmful gas, dust and peculiar smell discharged during high-temperature drying through filtration, thereby meeting the requirements of relevant regulations and ensuring the health of operators, and becoming the target of urgent need for improvement in the current industry.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a can satisfy the drying device of electronic device's different stoving demands and batch production demand.

In order to solve the technical problem, the utility model adopts the following technical scheme:

a drawer type drying device comprises a drying box body, wherein one or more groove bodies are arranged in the drying box body, and a plurality of drawers are arranged in the one or more groove bodies; and each tank body is independently provided with a heating temperature control system.

As a further improvement, the heating temperature control system separately arranged in each tank body comprises: a heater, a temperature sensor, a temperature regulator and an air path circulating unit; the drying device further comprises a controller, the temperature sensor is connected with the controller, the controller is connected with the heater through a temperature regulator, and the controller is connected with the air path circulating unit.

Furthermore, when the plurality of groove bodies are adopted, the heat-preservation isolation layer is filled between the plurality of groove bodies and the groove bodies.

Further, the device adopts a single-drawer timing mode.

Further, every drawer is provided with the handle, handle department is equipped with touch switch, every drawer corresponds and sets up a timer, drying device still includes audible and visual alarm suggestion part, touch switch is connected with the timer, the timer is connected with audible and visual alarm suggestion part.

Furthermore, the drying device is an environment-friendly split drawer type drying device, each groove body forms a drying unit, and each drying unit is correspondingly provided with an air inlet, an in-box circulating fan and an air outlet; the outer side of the drying box body is also provided with a sealed main exhaust channel and an active exhaust filtering device which are sequentially communicated with the exhaust port; the active exhaust filtering device is provided with an external air outlet; the whole body forms a wind path circulating channel formed by communicating an air inlet, a drying box body, an air outlet, a sealed main exhaust channel, an active exhaust filtering device and an external air outlet.

Furthermore, the sealed main exhaust channel and the active exhaust filtering device are detachably arranged outside the drying box body; the air inlet adopts an inner and outer double-layer shutter type adjustable metal grating, and a replaceable HEPA filtering material is attached behind the metal grating.

Furthermore, the active exhaust filtering device comprises a shell, and a fan and a multi-layer filtering device which are sequentially arranged in the shell, wherein the shell at the rear end of the multi-layer filtering device is provided with the external air outlet; the first layer of the multi-layer filtering device adopts a high-temperature resistant glass fiber layer, the glass fiber layer is in a zigzag folding shape, and the flowing direction of wind is along the tooth tip direction of the sawtooth; the second layer of the filtering device of the multi-layer filtering device adopts a high-temperature resistant melt-blown glass fiber HEPA filtering material; the third layer of the filtering device of the multi-layer filtering device adopts an activated carbon filter screen, and the activated carbon filter screen is made of activated carbon fibers with high adsorbability.

Furthermore, the drawer-type drying device is a drying and curing device for removing moisture of the electrostatic sensitive electronic device, and using liquid chemical materials to carry out three-proofing coating on PCBA or encapsulating the electronic module.

The utility model also provides a SMT manufacturing process production line, the production line includes foretell branch steamer tray formula drying device.

By adopting the technical scheme, the utility model discloses at least, following advantage has:

1. the utility model discloses a drying device considers drying object (electronic device) small, the variety is many to the different electronic device of relevant international, internal industry standard regulation use the characteristics that stoving temperature, stoving time are different, for taking into account temperature, time demand and the batch production needs that different devices were dried, this drying device adopts the design that the branch steamer tray formula was held, layering accuse temperature, single steamer tray timing, is an experimental oven, and the practicality is strong, can satisfy multiple demand.

2. The utility model discloses a drying device adopts the accurate accuse temperature of procedure, cascaded intensification technique to prevent to rise to setting for the stoving temperature in-process by the room temperature, owing to make among the electronic device metal, non-metallic material coefficient of thermal expansion difference very much, owing to the accurate device physical damage that ordinary drying device programming rate is too fast or the big very easy production of accuse temperature deviation, further leads to electronic device electrical property inefficacy or reliability reduction.

3. The utility model discloses a drying device has increased environmental protection function on ordinary oven basis, can be used to electronic manufacturing trade electronic components weld the preceding stoving of drying and remove damp, PCBA washs, behind the three proofings lacquer coating or behind the embedment of electronic function module chemical material's stoving solidification, the flammable and explosive chemicals in chemical industry and hazardous articles warehouse, the explosive drying and remove damp etc.. Can purify the poisonous and harmful gas volatilized in the high-temperature drying and dehumidifying process, filter dust particles and adsorb peculiar smell, so that the dust particles meet the requirements of relevant environmental protection regulations and ensure the health of operators.

4. The drying device is provided with a special filtering air inlet and high-temperature gas sealing active exhaust channel, and the active exhaust channel and the active filtering exhaust device are detachably designed.

5. The active filtering exhaust device adopts a closed structure, the special seamless sealing technology has the characteristics of small resistance and large filtering area, and harmful high-temperature gas in the device reaches the requirement of relevant environmental protection regulations and is discharged in compliance after being subjected to multistage high-efficiency filtering, so that the health of operators is guaranteed.

6. The first layer of filtering device in the active filtering exhaust device adopts a glass fiber layer, can resist high temperature, is integrally in a zigzag folding shape, can increase the filtering contact surface, and has small exhaust resistance.

7. The active exhaust filtering device adopts the design of a metal closed shell positioned outside the drying device, has a modular structure, is convenient to form, and can be quickly installed on the drying device.

8. The air inlet of the device body adopts an inner and outer double-layer louver type adjustable metal grating, so that the air inflow can be conveniently and manually adjusted.

9. The replaceable HEPA filtering material with the double-layer louver type adjustable metal grating rear-mounted can carry out primary filtration on particulate pollutants in air entering the drying device, and pollution to the dried product is avoided.

Drawings

The foregoing is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clear, the present invention will be further described in detail with reference to the accompanying drawings and the detailed description.

Fig. 1 is a schematic view of an overall structure of a split-drawer type drying device according to an embodiment of the present invention;

fig. 2 is a block diagram of a heating temperature control structure of the split-drawer type drying device according to an embodiment of the present invention;

fig. 3 is a block diagram of a single-drawer timing structure of the split-drawer drying device according to an embodiment of the present invention.

Fig. 4 is a schematic view of an overall structure of an environment-friendly split-drawer type drying apparatus according to an embodiment of the present invention;

fig. 5 is a schematic view of the structure of the first layer filtering device.

Detailed Description

The utility model provides a drying device mainly dehumidifies, heats the professional equipment of drying as the sensitive electron device of static (like the sensitive electron part of static, PCB subassembly, electron type functional module, precision apparatus), is applicable to the trade that has dehumidification, stoving protection demand such as electron, electrical product manufacturing. The utility model discloses the branch steamer tray formula and the environment-friendly drying device of specialty have mainly been designed to above-mentioned trade.

The utility model discloses according to the different demands of different electron device stoving temperatures in batches of same batch, the device adopts the independent accuse temperature heating technique of layering, the utility model discloses a form that the device adopted many steamer trays formula can hold the form for many steamer trays of single temperature formula or many temperature steamer trays formula, and many steamer trays of many temperature formula hold the preferred two temperature and many steamer trays formula that adopt of form.

As shown in fig. 1, the drawer-type drying device comprises a drying box body 1, wherein one or more groove bodies are arranged in the drying box body 1; be provided with a plurality of drawers in one or more cell bodies, this embodiment is for having the structure of two cell bodies, wherein, is provided with 4 drawers 11 in the upper cell body, is provided with four drawers 12 in the lower floor's cell body, and four drawers on every layer can divide two rows of settings, also can set up according to horizontal row or vertical row.

An independent heating temperature control system is arranged in each groove body and comprises a heater, a temperature sensor, a temperature regulator, an air path circulation unit, and a controller, wherein the temperature sensor is connected with the controller, the controller is connected with the heater through the temperature regulator, and the controller is connected with the air path circulation unit, and the detailed description is shown in fig. 2.

The heating temperature control circuit unit adopts a programmed precise temperature control and stepped temperature rise technology to prevent the drying device from causing thermal expansion physical damage of a precise electronic device due to too high temperature rise speed or temperature control deviation. During operation, a design mode of layered microcomputer stepped temperature control is adopted, and the temperature control range is as follows: the temperature is between room temperature and 200 ℃, the distribution precision is +/-3 ℃ (the regulation precision is +/-1 ℃), and the heating rate is 5-10 ℃/min. The heater uses a sheathed SUS heater or the like as a heating element, the temperature sensor samples a real-time temperature value in the tank, compares the real-time temperature value with a set temperature value, controls the operation of the heater through PID calculation, thereby achieving the purpose of controlling the output energy of the heater, and achieves the temperature index in the tank by adding a forced hot air circulation mode through an air path circulation unit. The temperature regulator adopts PID mode control, and the LED digital display sets up the operation mode: and (4) running at a fixed value, automatically stopping, and running a program. The setting of temperature regulator, its main effect lies in preventing that the heater heaies up too fast, because treat that the stoving product generally comprises different materials, and the thermal expansion coefficient between the different materials is also different, consequently, if the rapid heating up (equipment current temperature is 20 degrees, rises to the 90 degrees of settlement), because the thermal expansion coefficient between the different materials is different, leads to the separation damage between the different materials of product body easily.

And to the design of a plurality of cell bodies, set up one or more drawer and fill the heat preservation isolation layer between a plurality of cell bodies and the cell body in every cell body, the temperature influence between the different temperature layers can be kept apart to the heat preservation isolation layer, guarantees independent temperature layer accuse temperature precision.

According to different requirements of different electronic component drying time in batches of the same batch, the device adopts a single drawer timing design mode, the size of each drawer is determined according to the requirements of the size and the quantity of dried products, and the standard size (W multiplied by D multiplied by H) is 800mm multiplied by 510mm multiplied by 80 mm. The number of layers is more than or equal to 2, and the number of manufactured drawers of the actual device is 4-10 drawers in consideration of the size, the number and the picking and placing operation of dried products; each drawer adopts a rail type push-pull design to facilitate the product taking and placing. Each drawer is provided with a handle, a touch switch is arranged at the handle, a timer is correspondingly arranged on each drawer, the drying device further comprises an audible and visual alarm prompting component, the touch switch is connected with the timer, and the timer is connected with the audible and visual alarm prompting component, which is shown in detail in figure 3. During operation closes the drawer handle, touch switch, and the timer begins the timing, timing ability: 1 min-99 h59min, when the time is up, the sound and light alarm is given out to prompt, and the drawer is pulled open to dry and the timing is stopped to return to zero.

On the basis of the above-mentioned drawer type drying device, in view of the environmental protection problem, this embodiment also provides an environment-friendly drawer type drying device, as shown in fig. 4, this embodiment provides an environment-friendly drying device, including drying box body 1, this internal 1 of drying box is provided with 1 or more drying unit, wherein every drying unit corresponds to a cell body, can set up one or more drawer in every cell body, this embodiment explains with two drying unit (cell bodies), every drying unit has 4 drawers as an example.

Wherein, in order to guarantee that the gas flows in the drying device, harmful gas filters the discharge completely, at the drying unit (cell body) design area air regulation and the air filter function's of easily producing harmful gas air inlet. The upper drying unit is provided with air inlets 21 of the upper groove, and the number of the air inlets 21 is 1 on the left side and the right side of the drying box body; the lower drying unit is provided with air inlets 22 of the lower groove, and the number of the air inlets 22 is 1 on the left side and the right side of the drying box body; the air inlet manually adjusts air inflow through a metal grid structure, preferably adopts a double-layer shutter type adjustable metal grid, and adjusts the air inflow through the adjustment of the angles of an inner layer shutter and an outer layer shutter; replaceable HEPA filtering materials are arranged behind the double-layer louver type adjustable metal grating, particle pollutants in air entering the drying device are subjected to primary filtration, and pollutants such as dust and the like are prevented from entering the drying device to pollute products.

In addition, an in-box circulating fan is further arranged in the drying unit, exhaust ports are correspondingly designed at the back of the drying unit (groove body) (the number of the exhaust ports is set according to the number of the drying unit or the groove body), if an exhaust port 31 is arranged at the back of the upper drying unit, an exhaust port 32 is arranged at the back of the lower drying unit, the exhaust ports 31 and 32 are connected with a detachable metal sealing main exhaust channel 4 at the outer side (the back side) of the drying box body 1 in a parallel connection mode, a detachable active exhaust filtering device 5 is further arranged at the upper part of the outer side of the drying box body 1, the sealing main exhaust channel 4 is communicated with the active exhaust filtering device 5, harmful gas is sent into the active exhaust filtering device 5, an external air outlet 51 is arranged at the upper part of the active exhaust filtering device.

From the above, the drying device integrally forms a wind path circulation channel which is formed by communicating an air inlet, a drying box body, an air outlet, a sealed main exhaust channel, an active exhaust filtering device and an external air outlet. The air inlet is used for primarily filtering the air entering the drying unit to ensure the cleanness of the air entering the drying unit, and the rear air path circulating channel is used for discharging harmful gas and filtering and deodorizing the harmful gas. In addition, the detachable design structure can meet different requirements of users, and the users with environmental protection requirements can be assembled on site according to the requirements of the users, so that the installation is convenient.

Specifically, the active exhaust filter device 5 includes a metal sealed housing, a fan (active air extraction device) and a multi-layer filter device are sequentially arranged inside the housing, and an air outlet 51 is arranged on the housing at the rear end of the multi-layer filter device.

The harmful gas that electronic device and chemical material volatilize in to drying device adopts big wind high efficiency three-layer different materials (removable) filter core to filter, is first layer filter equipment (elementary high efficiency filter), second layer filter equipment (middle efficiency filter) and third layer filter equipment (active carbon filter screen) respectively.

Because the working temperature of the drying device is in the range of room temperature to 200 ℃, the primary high-efficiency filtration adopts a high-temperature resistant glass fiber layer to filter high-temperature particles (smoke, dust and the like) with the diameter of more than 0.3 micron, the glass fiber layer is preferably in a zigzag folding shape (as shown in figure 5), and the flowing direction of wind is along the tooth tip direction of the sawtooth; the design can increase the filtering contact surface and has small air exhaust resistance. The intermediate-efficiency filtration adopts a melt-blown glass fiber HEPA filtering material with high temperature resistance and high filtering precision, and mainly filters out 0.1-0.3 micron particles; the activated carbon filter screen is made of activated carbon fiber with high adsorbability, can increase the filtering area and the air permeability, and mainly filters volatile solvents and odor.

The active air extractor adopts a super-low sound large flow fan (the flow is up to 320 m)³H), the strong air flow can filter the smoke, particles and gas in the working area instantly. The large-flow fan and the intelligent measurement and control circuit board are arranged at the tail end of the anti-static high-temperature-resistant filtering device in the internal, and alarm (filter element replacement) is carried out according to the filter element pressure difference.

In addition, this embodiment still provides an SMT production line for PCBA makes, and the production line includes belt cleaning device, welding set and foretell branch steamer tray formula drying device etc..

To sum up, the utility model designs an environment-friendly split-drawer type experimental-level drying device, which is mainly used for safely drying static sensitive electronic devices, so that on one hand, the thermal expansion damage of the precise electronic devices caused by too fast temperature rise is avoided through the technology of step temperature rise and precise temperature control, and the electrical performance failure or reliability reduction of the electronic devices is prevented; on the other hand satisfies different stoving demands and batch production demand, in addition still can be to the poisonous and harmful gas of exhaust, dust, peculiar smell carry out purification treatment through filtering when high temperature is dried, prevents the emission of stoving in-process harmful gas, is suitable for extensive popularization and application.

The above description is only for the preferred embodiment of the present invention, and not intended to limit the present invention in any way, and those skilled in the art can make various modifications, equivalent changes and modifications using the above-described technical content, all of which fall within the scope of the present invention.

Claims (10)

1. The drawer type drying device is characterized by comprising a drying box body, wherein one or more groove bodies are arranged in the drying box body, and a plurality of drawers are arranged in the one or more groove bodies; and each tank body is independently provided with a heating temperature control system.

2. The drawer type drying device of claim 1, wherein the heating temperature control system separately arranged in each tank body comprises: a heater, a temperature sensor, a temperature regulator and an air path circulating unit; the drying device further comprises a controller, the temperature sensor is connected with the controller, the controller is connected with the heater through a temperature regulator, and the controller is connected with the air path circulating unit.

3. The drawer type drying device of claim 1, wherein when the plurality of grooves are provided, the plurality of grooves and the heat insulation layer are filled between the grooves.

4. The split drawer drying device of claim 1, wherein the device is in the form of a single drawer timer.

5. The drawer type drying device of claim 4, wherein each drawer is provided with a handle, a touch switch is arranged at the handle, a timer is correspondingly arranged on each drawer, the drying device further comprises an audible and visual alarm prompting component, the touch switch is connected with the timer, and the timer is connected with the audible and visual alarm prompting component.

6. The drawer type drying device according to claim 1, wherein each tank body forms a drying unit, and each drying unit is correspondingly provided with an air inlet, an in-tank circulating fan and an air outlet; the outer side of the drying box body is also provided with a sealed main exhaust channel and an active exhaust filtering device which are sequentially communicated with the exhaust port; the active exhaust filtering device is provided with an external air outlet; the whole body forms a wind path circulating channel formed by communicating an air inlet, a drying box body, an air outlet, a sealed main exhaust channel, an active exhaust filtering device and an external air outlet.

7. The drawer type drying device of claim 6, wherein the sealed main exhaust channel and the active exhaust filter device are detachably mounted outside the drying box body;

the air inlet adopts an inner and outer double-layer shutter type adjustable metal grating, and a replaceable HEPA filtering material is attached behind the metal grating.

8. The drawer type drying device of claim 6, wherein the active exhaust filter device comprises a casing, and a fan and a multi-layer filter device which are sequentially arranged in the casing, and the casing at the rear end of the multi-layer filter device is provided with the outward air outlet;

the first layer of the multi-layer filtering device adopts a high-temperature resistant glass fiber layer, the glass fiber layer is in a zigzag folding shape, and the flowing direction of wind is along the tooth tip direction of the sawtooth;

the second layer of the filtering device of the multi-layer filtering device adopts a high-temperature resistant melt-blown glass fiber HEPA filtering material;

the third layer of the filtering device of the multi-layer filtering device adopts an activated carbon filter screen, and the activated carbon filter screen is made of activated carbon fibers with high adsorbability.

9. A split-drawer drying apparatus according to any one of claims 1 to 8, wherein the split-drawer drying apparatus is a drying and curing apparatus for removing moisture from static sensitive electronic devices, coating PCBA with three-proofing materials using liquid chemical materials or potting electronic modules.

10. A production line, characterized by being a PCBA or SMT manufacturing process production line, the production line comprising the split drawer drying arrangement of any one of claims 1-8.

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