CN216954072U - Humidifying and filtering system for atmosphere sintering furnace of chip multilayer ceramic capacitor - Google Patents
Humidifying and filtering system for atmosphere sintering furnace of chip multilayer ceramic capacitor Download PDFInfo
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- CN216954072U CN216954072U CN202123393224.8U CN202123393224U CN216954072U CN 216954072 U CN216954072 U CN 216954072U CN 202123393224 U CN202123393224 U CN 202123393224U CN 216954072 U CN216954072 U CN 216954072U
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Abstract
The utility model relates to a humidifying and filtering system for an atmosphere sintering furnace of a chip multilayer ceramic capacitor, which comprises a humidifying barrel, a first water level sensor, a controller, a first timer, a second timer and a water supplementing electromagnetic valve, wherein the humidifying barrel is connected with the first water level sensor; the first water level sensor sends a first timing signal to the first timer when the water level is lower than the first water level, and sends a second timing signal to the second timer when the water level is higher than the first water level; the first timer starts timing after receiving the first timing signal and sends a water supplementing signal to the controller after timing is finished; the second timer starts timing after receiving the second timing signal and sends a first water supplementing stopping signal to the controller after timing is finished; and after receiving the first water supplementing stopping signal, the controller turns on the water supplementing electromagnetic valve and turns off the water supplementing electromagnetic valve. The humidifying and filtering system for the sintering furnace of the chip type multilayer ceramic capacitor can ensure the stability of the high-temperature sintering environment of the chip type multilayer ceramic capacitor and improve the product performance.
Description
Technical Field
The utility model relates to the technical field of ceramic element sintering, in particular to a humidifying and filtering system for an atmosphere sintering furnace of a chip type multilayer ceramic capacitor.
Background
A Chip multi-layer Ceramic Capacitor (MLCC) is formed by overlapping Ceramic dielectric films printed with electrodes (inner electrodes) in a staggered mode, forming a Ceramic Chip through one-time high-temperature sintering, and sealing metal layers (outer electrodes) at two ends of the Chip to realize the required capacitance value and other parameter characteristics.
In the forming process of the chip type multilayer ceramic capacitor, high-temperature crystallization is an essential important link, and an atmosphere sintering furnace is a main environment for high-temperature crystallization of the chip type multilayer ceramic capacitor. The chip multilayer ceramic capacitor is subjected to redox reaction in a closed atmosphere sintering furnace through a high temperature curve, and a green capacitor chip produced in the previous process is subjected to high temperature treatment to form a ceramic body with high mechanical property and excellent electrical property. In order that the chip multilayer ceramic capacitor can be stably crystallized in a closed high-temperature environment, nitrogen and hydrogen (or other reducing gases) play an important role (nitrogen is a protective gas to protect the chip multilayer ceramic capacitor from being easily oxidized in the high-temperature environment, and hydrogen is a reducing gas to make the chip multilayer ceramic capacitor not easily reduced in the high-temperature environment). Nitrogen and hydrogen are introduced into a closed sintering furnace according to a process proportion to provide a scientific and stable crystallization environment for the chip type multilayer ceramic capacitor.
In the traditional process, nitrogen and hydrogen are filtered, cleaned and humidified by constant-temperature water and then are introduced into an atmosphere sintering furnace. When nitrogen and hydrogen pass through, can take away the constant temperature water through the mode of steam and make the water yield of constant temperature water reduce, and the temperature of constant temperature water can be influenced to the water of replenishment. Therefore, it is desirable to provide a humidification filtration system to ensure that the temperature of the constant temperature water through which the nitrogen and hydrogen gases pass remains stable during the addition of water.
SUMMERY OF THE UTILITY MODEL
Based on the humidification and filtration system, the humidification and filtration system for the atmosphere sintering furnace of the chip type multilayer ceramic capacitor can ensure the stability of the high-temperature sintering environment of the chip type multilayer ceramic capacitor, improve the product performance and improve the equipment precision.
The utility model provides a humidifying and filtering system for an atmosphere sintering furnace of a chip type multilayer ceramic capacitor, which comprises:
the humidifying device comprises a humidifying barrel, a first water level sensor, a controller, a first timer, a second timer and a water replenishing electromagnetic valve;
the bottom of the humidifying barrel is provided with an air inlet connected with an external air inlet pipeline, the top of the humidifying barrel is provided with an air outlet connected with an external exhaust pipeline, and the humidifying barrel is also provided with a water replenishing port connected with an external water replenishing pipeline;
the water replenishing electromagnetic valve is arranged on the water replenishing pipeline;
the first water level sensor is respectively connected with the first timer and the second timer, and is used for detecting a first water level in the humidifying barrel;
the controller is respectively connected with the first timer, the second timer and the water replenishing electromagnetic valve.
Optionally, the water replenishing port is disposed at the bottom of the humidification barrel, and the height of the water replenishing port is lower than the first water level.
Optionally, the humidifying device further comprises a second water level sensor, the second water level sensor is connected with the controller, and the second water level sensor is used for detecting a second water level in the humidifying barrel, wherein the second water level is higher than the first water level.
Optionally, the air conditioner further comprises a third water level sensor and an air inlet electromagnetic valve, wherein the air inlet electromagnetic valve is arranged on the air inlet pipeline;
the third water level sensor is connected with the controller and used for detecting a third water level in the humidifying barrel, wherein the third water level is lower than the first water level.
Optionally, the humidifying device further comprises a heating element, wherein the heating element is arranged at the bottom of the humidifying barrel and is used for heating water in the humidifying barrel.
Optionally, the heating element includes a plurality of heating pipes, and the plurality of heating pipes are uniformly arranged at the bottom of the humidifying barrel.
Optionally, the first water level sensor is a floating ball type liquid level sensor.
Optionally, the controller is a PLC.
According to the humidifying and filtering system for the atmosphere sintering furnace of the chip type multilayer ceramic capacitor, water can be supplemented within a certain time when the water level in the humidifying barrel is reduced to the set first water level, and water supplementing is stopped within a certain time after the water level is raised back to the set first water level, so that the normal-temperature water quantity of primary water supplementing is small (a small quantity of water is added for many times), the influence on the water temperature in the humidifying barrel is slight, the water temperature in the humidifying barrel is kept at a stable temperature, the temperature of gas entering the sintering furnace is stable, the stability of the high-temperature sintering environment of the chip type multilayer ceramic capacitor is ensured, the product performance is improved, and the equipment precision is improved.
For a better understanding and implementation, the technical solutions of the present invention are described in detail below with reference to the accompanying drawings.
Drawings
FIG. 1 is a block diagram of a humidifying and filtering system for a sintering furnace of a chip type multi-layered ceramic capacitor according to an embodiment of the present invention;
FIG. 2 is a schematic diagram showing a control circuit configuration of a humidifying and filtering system for a sintering furnace of a chip type multilayer ceramic capacitor according to an embodiment of the present invention;
reference numerals: 1-a humidifying barrel, 11-a water replenishing port, 12-an air inlet, 13-an air outlet, 2-a water replenishing pipeline, 21-a water replenishing electromagnetic valve, 3-an air inlet pipeline, 31-an air inlet electromagnetic valve, 4-an air outlet pipeline, 51-a first water level sensor, 52-a second water level sensor, 53-a third water level sensor, 6-a heating element, 7-a controller, 8-a first timer and 9-a second timer.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model. It should be further noted that, for the convenience of description, only some but not all of the relevant aspects of the present invention are shown in the drawings.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
In the embodiment of the present invention, the reducing gases are nitrogen and hydrogen, the water temperature in the humidification barrel is controlled to 35 ± 2 ℃ or 40 ± 2 ℃, and the water supplement of the humidification barrel is normal temperature water (15 to 28 ℃) for example.
Aiming at the technical problems in the background art, the utility model provides a humidifying and filtering system for an atmosphere sintering furnace of a chip type multilayer ceramic capacitor, which can start water supplement within a certain time when the water level in a humidifying barrel is reduced to a set first water level, and stop water supplement within a certain time after the water level is raised back to the set first water level, so that the normal-temperature water quantity of primary water supplement is less (a small quantity of water is added for many times), the influence on the water temperature in the humidifying barrel is slight, the water temperature in the humidifying barrel is kept at a stable temperature, the temperature stability of gas entering the sintering furnace is ensured, the high-temperature sintering environment stability of the chip type multilayer ceramic capacitor is ensured, the product performance is improved, and the equipment precision is improved.
In the following, several specific embodiments are given for describing the technical solution of the present application in detail. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.
As shown in fig. 1 and 2, in one embodiment, a humidifying and filtering system for an atmosphere sintering furnace of a chip type multilayer ceramic capacitor according to the present invention includes a humidifying barrel 1, a water replenishing port 11 connected to an external water replenishing pipe 2, an air inlet 12 connected to an external air inlet pipe 3, and an air outlet 13 connected to an external air outlet pipe 4 are respectively provided in the humidifying barrel 1.
Wherein, the air inlet 12 and the air inlet pipe 3 are arranged at the bottom of the humidifying barrel 1 for inputting the reducing gas required by the oxidation-reduction reaction in the sintering furnace into the humidifying barrel 1, and the air inlet pipe 3 is provided with an air inlet electromagnetic valve 13, and in a preferred embodiment, the air inlet pipe 3 is further provided with a check valve for preventing water from flowing back into the air inlet pipe. An exhaust port 13 and an exhaust duct 4 are provided at the top of the humidification tub 1.
Preferably, the water replenishing port 11 and the water replenishing pipe 2 are provided at the bottom of the humidification tub to prevent the humidity of the exhaust gas from being increased after the exhaust gas is mixed with the replenishing water. A water replenishing electromagnetic valve 21 is also arranged on the water replenishing pipeline 2.
A heating element 6 is further disposed at the lower portion of the humidifying barrel 1, and preferably, the heating element 6 is a plurality of heating pipes disposed at the bottom of the humidifying barrel 1, and the plurality of heating pipes extend into the humidifying barrel 1 from the side wall of the humidifying barrel 1 for keeping the temperature of the water in the humidifying barrel 1 at a set temperature. In some examples, a temperature sensor is further disposed in the humidification barrel 1, and the plurality of heating pipes can dynamically heat the water in the humidification barrel 1 according to the water temperature detected by the temperature sensor, so that the water temperature is more stable.
As shown in fig. 1, a first water level sensor 51 is provided at a first water level L1 in the humidification tub 1, a second water level sensor 52 is provided at a second water level L2 in the humidification tub 1, and a third water level sensor 53 is provided at a third water level L3 in the humidification tub 1, wherein the second water level is higher than the first water level and the third water level is lower than the first water level.
In a preferred embodiment, the first, second and third water level sensors 51, 52, 53 are ball float level sensors. In other embodiments, the sensor may be a liquid level switch, or the like, and the sensor may be an ultrasonic liquid level sensor disposed at the top of the humidification tub 1.
As shown in fig. 2, the humidification and filtration system for a sintering furnace of a chip type multilayer ceramic capacitor in the embodiment of the present invention further includes a controller 7, a first timer 8 and a second timer 9, wherein the controller 7 is electrically connected to the first timer 8, the second timer 9, a second water level sensor 52, a third water level sensor 53, a water replenishing solenoid valve 21 and an air intake solenoid valve 31, respectively; the first water level sensor 51 is connected to the first timer 8 and the second timer 9, respectively. Preferably, the controller 7 is a PLC. The first timer 8 and the second timer 9 are set to start timing upon receiving the trigger signal and to output a signal after a set timing time, which may be modified, has been reached. In some examples, the first timer 8 and the second timer 9 may be conventional timers, and may also be a control chip, a controller, etc. that can perform a timing function.
The working process of the embodiment of the utility model is as follows:
when detecting that the water level in the humidification barrel 1 is lower than the first water level L1, the first water level sensor 51 sends a first timing signal to the first timer 8, the first timer 8 starts timing according to a set timing time after receiving the first timing signal, and sends a water supplement signal to the controller 7 after the timing is finished, and after receiving the water supplement signal, the controller 7 drives the water supplement solenoid valve 12 to open, and the humidification barrel 1 starts water supplement.
The first water level sensor 51 sends a second timing signal to the second timer 9 after detecting that the water level in the humidification barrel 1 reaches the first water level L1 through water supplement, the second timer 9 starts timing according to a set timing time after receiving the second timing signal, and sends a water supplement stopping signal to the controller 7 after timing, and the controller 7 drives the water supplement electromagnetic valve 12 to close after receiving the water supplement stopping signal, so that the humidification barrel 1 stops water supplement.
The second water level sensor 52 sends a second water supplement stopping signal to the controller 7 when detecting that the water level in the humidification tub 1 is higher than the second water level L2, so that the controller 7 closes the water supplement solenoid valve 12 after receiving the second water supplement stopping signal, so as to prevent the water level in the humidification tub 1 from being too high.
When detecting that the water level in the humidification tub 1 is lower than the third water level L3, the third water level sensor 53 sends an air intake stop signal to the controller 7, so that the controller 7 closes the air intake solenoid valve 31 after receiving the air intake stop signal, thereby preventing the amount of water in the humidification tub 1 from being too small, the filtering effect on the reducing gas from being not increased, and the humidity of the exhaust gas from being too low.
Compared with the prior art, the humidifying and filtering system for the chip multilayer ceramic capacitor atmosphere sintering furnace has the following technical effects:
the water level that can be in the humidification bucket reduces and just begins the moisturizing to a specified time when the first water level time delay of settlement, the moisturizing is stopped to a specified time of delaying after the water level rises back to the first water level of settlement, thereby the normal atmospheric temperature water yield of moisturizing is less (add water a small amount many times), it is slight to the temperature influence in the humidification bucket, the temperature in the humidification bucket keeps stabilizing temperature, thereby gas temperature stability in having guaranteed to get into the fritting furnace, guarantee piece formula multilayer ceramic capacitor's high temperature sintering environmental stability, improve product property and property ability, the lifting means precision.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (8)
1. A humidification and filtration system for an atmosphere sintering furnace of a chip multilayer ceramic capacitor, comprising:
the humidifying device comprises a humidifying barrel, a first water level sensor, a controller, a first timer, a second timer and a water replenishing electromagnetic valve;
the bottom of the humidifying barrel is provided with an air inlet connected with an external air inlet pipeline, the top of the humidifying barrel is provided with an air outlet connected with an external exhaust pipeline, and the humidifying barrel is also provided with a water replenishing port connected with an external water replenishing pipeline;
the water replenishing electromagnetic valve is arranged on the water replenishing pipeline;
the first water level sensor is respectively connected with the first timer and the second timer, and is used for detecting a first water level in the humidifying barrel;
the controller is respectively connected with the first timer, the second timer and the water replenishing electromagnetic valve.
2. The humidifying and filtering system for the atmosphere sintering furnace of the chip multilayer ceramic capacitor as recited in claim 1, wherein:
the water replenishing port is arranged at the bottom of the humidifying barrel, and the height of the water replenishing port is lower than the first water level.
3. The humidifying and filtering system for the chip multilayer ceramic capacitor atmosphere sintering furnace according to claim 2, characterized in that:
the humidifying device is characterized by further comprising a second water level sensor, the second water level sensor is connected with the controller and used for detecting a second water level in the humidifying barrel, and the second water level is higher than the first water level.
4. The humidifying and filtering system for the atmosphere sintering furnace of chip multilayer ceramic capacitor as claimed in claim 3, wherein:
the air inlet electromagnetic valve is arranged on the air inlet pipeline;
the third water level sensor is connected with the controller and used for detecting a third water level in the humidifying barrel, wherein the third water level is lower than the first water level.
5. The humidifying and filtering system for the chip multilayer ceramic capacitor atmosphere sintering furnace according to claim 1, characterized in that:
the humidifying device further comprises a heating element, wherein the heating element is arranged at the bottom of the humidifying barrel and is used for heating water in the humidifying barrel.
6. The humidifying and filtering system for the chip multilayer ceramic capacitor atmosphere sintering furnace according to claim 5, characterized in that:
the heating element comprises a plurality of heating pipes, and the heating pipes are uniformly arranged at the bottom of the humidifying barrel.
7. The humidifying and filtering system for the chip multilayer ceramic capacitor atmosphere sintering furnace according to claim 1, characterized in that:
the first water level sensor is a floating ball type liquid level sensor.
8. The humidifying and filtering system for the chip multilayer ceramic capacitor atmosphere sintering furnace according to claim 1, characterized in that:
the controller is a PLC.
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| CN202123393224.8U CN216954072U (en) | 2021-12-29 | 2021-12-29 | Humidifying and filtering system for atmosphere sintering furnace of chip multilayer ceramic capacitor |
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| CN202123393224.8U CN216954072U (en) | 2021-12-29 | 2021-12-29 | Humidifying and filtering system for atmosphere sintering furnace of chip multilayer ceramic capacitor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115790143A (en) * | 2022-11-23 | 2023-03-14 | 广东昊达智能装备科技有限公司 | Atmosphere burning end furnace with humidifying function and control method thereof |
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2021
- 2021-12-29 CN CN202123393224.8U patent/CN216954072U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115790143A (en) * | 2022-11-23 | 2023-03-14 | 广东昊达智能装备科技有限公司 | Atmosphere burning end furnace with humidifying function and control method thereof |
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