Preheating furnace

Abstract

The present invention discloses a preheating furnace for preheating electronic components loaded on a tray. The preheating furnace includes a furnace chamber, with openings provided on opposite sides of the furnace chamber. The furnace chamber is further provided with a sealing door for opening or closing the openings. A transmission device for transmitting the tray is arranged inside the furnace chamber. The preheating furnace further includes: a preheating device, including an air inlet mechanism, a heating mechanism, and an air return mechanism. The air inlet mechanism and the air return mechanism are arranged outside the furnace chamber and are both communicated with the furnace chamber. The heating mechanism is arranged inside the furnace chamber and is located between the air inlet mechanism and the air return mechanism; a power supply device, arranged inside the furnace chamber and used for supplying power to the tray to heat the electronic components. The preheating furnace of the present invention improves the preheating efficiency by simultaneously performing hot air heating and tray contact heating on the electronic components.

Description

Technical Field

[0001] The present invention relates to the technical field of drying equipment, and particularly to a preheating furnace. Background Art

[0002] During the processing of lithium batteries, drying is required to reduce the moisture content in the lithium batteries or electronic components, so as to meet the corresponding usage requirements. The drying process is widely applied in the production and processing of lithium batteries. Most of the current drying equipment is equipped with a separate drying furnace, and a lithium battery cart is used to transport the lithium batteries to be dried into the drying equipment for processing. The processing efficiency of the current drying equipment is low, and it is impossible to achieve highly uniform control of humidity and temperature. A set of continuously processable drying systems is composed of multiple drying equipment with openings on opposite sides. By setting different drying temperatures and drying times for each drying equipment, the deficiencies of the aforementioned drying equipment can be solved. However, directly introducing lithium batteries into the drying system will result in low drying efficiency and poor drying effect. Setting up a preheating furnace that cooperates with the drying system can well solve this problem. There is an urgent need for a preheating furnace that can efficiently preheat lithium batteries. The preheating furnace with a traditional structure uses one fan and one set of heating elements, which cannot form an effective air field and provide sufficient energy for heating the lithium batteries, resulting in low heating speed, poor temperature uniformity, and the need for vacuum pumping to ensure the preheating of lithium batteries by the preheating furnace. Summary of the Invention

[0003] The main object of the present invention is to provide a preheating furnace, aiming to solve the technical problem of low heating speed of the preheating furnace for electronic components in the prior art.

[0004] To achieve the above object, the preheating furnace proposed by the present invention is used to preheat the electronic components loaded on the tray. The preheating furnace includes a furnace chamber, openings are provided on opposite sides of the furnace chamber, and the furnace chamber is further provided with a sealing door for opening or closing the openings. A transmission device for transmitting the tray is arranged inside the furnace chamber; the preheating furnace further includes: a preheating device, including an air inlet mechanism, a heating mechanism, and an air return mechanism. The air inlet mechanism and the air return mechanism are arranged outside the furnace chamber and are both communicated with the furnace chamber. The heating mechanism is arranged inside the furnace chamber and is located between the air inlet mechanism and the air return mechanism; a power supply device, arranged inside the furnace chamber and used to supply power to the tray to heat the electronic components.

[0005] Preferably, the power supply device includes a first driving member and a plurality of power supply contacts arranged at intervals. The first driving member is used to drive the plurality of power supply contacts to simultaneously abut against the tray.

[0006] Preferably, the preheating furnace further includes a temperature measuring device arranged inside the furnace chamber, and the temperature measuring device is used to detect the temperature of the tray.

[0007] Preferably, the temperature measuring device includes a second driving member and a plurality of current signal contacts arranged at intervals, and the second driving member is used to drive the plurality of current signal contacts to simultaneously abut against the tray.

[0008] Preferably, the power supply device and the temperature measuring device are respectively arranged on two sides of the tray, and contact contacts are respectively arranged at positions on two sides of the tray corresponding to the current signal contacts and the power supply contacts.

[0009] Preferably, the air inlet mechanism includes a fan and an air inlet hood. The air outlet of the fan is communicated with the air inlet of the air inlet hood, the air outlet of the air inlet hood is communicated with the furnace chamber, and the heating mechanism is arranged close to the air inlet hood; the air return mechanism includes an air return hood. The air inlet of the air return hood is communicated with the furnace chamber, and the air outlet of the air return hood is communicated with the air inlet of the fan through an air return pipe.

[0010] Preferably, the heating mechanism includes a plurality of electric heating tubes. A plurality of air guiding plates are arranged in the air inlet hood, and an air guiding channel is formed between any two adjacent air guiding plates. Each air guiding channel is correspondingly provided with one electric heating tube.

[0011] Preferably, the air inlet mechanism is arranged at the top of the furnace chamber, and the air return mechanism is arranged at the bottom of the furnace chamber.

[0012] Preferably, a plurality of preheating devices are sequentially arranged on the furnace chamber along the transmission direction of the transmission device.

[0013] Preferably, a temperature control mechanism electrically connected to the heating mechanism and the power supply device is further arranged outside the furnace chamber, and the temperature control mechanism is used to control the output power of the heating device and the power supply device.

[0014] In the technical solution of the present invention, when the tray loaded with electronic components is conveyed by the conveying device to the designated position in the furnace chamber, the sealing doors on both sides of the furnace chamber are closed, and the air inlet mechanism communicated with the furnace chamber blows air into the furnace chamber. The heating device located between the air inlet mechanism and the air return mechanism heats the blown air of the air inlet mechanism to form hot air. While the hot air heats the electronic components on the tray, the power supply device supplies power to the tray so that the tray conducts contact heating on the electronic components. The hot air can enter the air return mechanism through the furnace chamber, and the hot air in the air return mechanism flows back to the air inlet mechanism to circulate the hot air. When the temperature in the furnace chamber reaches the preset temperature, the sealing doors on both sides of the furnace chamber are opened, the power supply device stops supplying power to the tray, and the conveying device conveys the tray out of the preheating furnace, and the preheating furnace completes the preheating of the electronic components loaded on the tray. Through the cooperation of the air inlet mechanism, the air return mechanism and the heating device, the circulating hot air heating of the electronic components is realized. At the same time, the power supply device supplies power to the tray to realize the contact heating of the electronic components, so that the heating efficiency of the preheating furnace for the electronic components is improved, and the preheating time of the preheating furnace for the electronic components is reduced. The preheating furnace of the present invention improves the preheating efficiency by simultaneously performing hot air heating and tray contact heating on the electronic components. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0016] Figure 1 It is an assembly schematic diagram of a preheating furnace from one perspective according to an embodiment of the present invention;

[0017] Figure 2 is Figure 1 an enlarged schematic diagram of area A in

[0018] Figure 3 It is an assembly schematic diagram of a preheating furnace from another perspective according to an embodiment of the present invention;

[0019] Figure 4 It is an assembly schematic diagram of a preheating furnace from yet another perspective according to an embodiment of the present invention;

[0020] Figure 5 is Figure 4 an enlarged schematic diagram of area B in

[0021] Explanation of the reference numerals in the drawings:

[0022]

[0023]

[0024] The realization, functional features and advantages of the object of the present invention will be further described in conjunction with the embodiments and with reference to the accompanying drawings. Specific embodiments

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts belong to the scope of protection of the present invention.

[0026] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, then the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0027] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, then the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0028] The descriptions of directions such as "up" and "down" in the present invention are based on Figures 1 to 5 the directions shown in Figures 1 to 5 and are only used to explain the relative positional relationship between components in the posture shown. If the specific posture changes, the directional indications will also change accordingly.

[0029] The present invention provides a preheating furnace.

[0030] As Figures 1 to 5As shown, in an embodiment of the present invention, a preheating furnace 100 is used to preheat electronic components loaded on a tray 1. The preheating furnace 100 includes a furnace chamber 2. Openings are provided on opposite sides of the furnace chamber 2. The furnace chamber 2 is further provided with a sealing door 3 for opening or closing the openings. A transmission device 4 for transmitting the tray 1 is arranged in the furnace chamber 2; the preheating furnace 100 further includes: a preheating device 5, including an air inlet mechanism 51, a heating mechanism 53 and an air return mechanism 52. The air inlet mechanism 51 and the air return mechanism 52 are arranged outside the furnace chamber 2 and are both communicated with the furnace chamber 2. The heating mechanism 53 is arranged inside the furnace chamber and is located between the air inlet mechanism 51 and the air return mechanism 52; a power supply device 6, arranged in the furnace chamber 2 and used to supply power to the tray 1 to heat the electronic components. The transmission device 4 in this embodiment includes a transmission gear (not shown in the figure) and a drive motor 41 for driving the transmission gear. A rack for cooperating with the transmission gear is arranged at the bottom of the tray 1, which facilitates the transmission device 4 to convey the tray 1. The openings on both sides of the furnace chamber 2 are respectively an inlet and an outlet. It can be understood that for the electronic components loaded on the tray 1, in this embodiment, the preheating furnace 100 is taken as an example for preheating lithium batteries.

[0031] When the tray 1 loaded with lithium batteries is conveyed from the inlet of the furnace chamber 2 to a specified position inside the furnace chamber 2 by the transmission device 4, the sealing doors 3 on both sides of the furnace chamber 2 are closed. The air inlet mechanism 51 communicated with the furnace chamber 2 blows air into the furnace chamber 2. The heating device located between the air inlet mechanism 51 and the air return mechanism 52 heats the air blown by the air inlet mechanism 51 to form hot air. While the hot air heats the lithium batteries on the tray 1, the power supply device 6 supplies power to the tray 1 for the tray 1 to conduct contact heating on the lithium batteries. It can be understood that the tray 1 in this embodiment is provided with a heating element, and the power supply device 6 is used to supply power to the heating element, and the heating element generates heat to preheat the lithium batteries on the tray 1. The hot air can enter the air return mechanism 52 through the furnace chamber 2, and the hot air in the air return mechanism 52 flows back to the air inlet mechanism 51 to make the hot air circulate. When the temperature inside the furnace chamber 2 reaches the preset temperature, the sealing doors 3 on both sides of the furnace chamber 2 are opened. The air inlet mechanism 51 stops blowing air and at the same time the power supply device 6 stops supplying power to the tray 1. The transmission device 4 conveys the tray 1 out of the preheating furnace 100 from the outlet, and the preheating furnace 100 completes the preheating of the lithium batteries loaded on the tray 1. In this embodiment, through the cooperation of the air inlet mechanism 51, the air return mechanism 52 and the heating device, the circulating hot air heating of the lithium batteries is realized. At the same time, through the power supply device 6 supplying power to the tray 1, the contact heating of the lithium batteries is realized, which improves the heating efficiency of the preheating furnace 100 for the lithium batteries and reduces the preheating time of the preheating furnace 100 for the lithium batteries. The preheating furnace 100 in this embodiment improves the preheating efficiency by simultaneously performing hot air heating and tray 1 contact heating on the lithium batteries. And, because the preheating furnace 100 in this embodiment performs hot air heating and tray 1 contact heating on the lithium batteries, it is not necessary to evacuate the preheating furnace 100, which simplifies the operation process of lithium battery preheating, is simple to operate and convenient to use.

[0032] Specifically, the power supply device 6 includes a first driving member 62 and a plurality of power supply contacts 61 arranged at intervals. The first driving member 62 is used to drive the plurality of power supply contacts 61 to simultaneously abut against the tray 1. The plurality of power supply contacts 61 are evenly spaced along the transmission direction of the transmission device 4. As Figure 1 and Figure 4 shown, a first driving member 62 is arranged between the two air return mechanisms 52. The first driving member 62 in this embodiment is a driving cylinder, and the driving cylinder can control the plurality of power supply contacts 61 to move up and down simultaneously to abut against the tray 1. When the transmission device 4 transports the lithium battery on the tray 1 to a specified position in the furnace chamber 2, the first driving member 62 drives the plurality of power supply contacts 61 to move downward. While the plurality of power supply contacts 61 are in contact with the tray 1, they transmit strong electricity to the tray 1, so that the heating element on the tray 1 heats the lithium battery on the tray 1. In this embodiment, the contact heating of the lithium battery is realized by the plurality of power supply contacts 61 simultaneously abutting against the tray 1, which improves the heating efficiency of the preheating furnace 100. Moreover, arranging the plurality of power supply contacts 61 to abut against the tray 1 facilitates the control of the charging and power-off of the tray 1 and can fully ensure the close contact between the power supply device 6 and the tray 1.

[0033] In this embodiment, the preheating furnace 100 further includes a temperature measuring device (not shown in the figure) arranged in the furnace chamber 2. The temperature measuring device is used to detect the temperature of the tray 1. In this embodiment, by arranging a temperature measuring device for detecting the temperature of the tray 1 in the furnace chamber 2, the temperature of the tray 1 and the lithium battery on the tray 1 can be monitored in real time, and the actual temperatures of the tray 1 and the battery can be accurately transmitted. Specifically, the temperature measuring device includes a second driving member and a plurality of current signal contacts arranged at intervals. The second driving member is used to drive the plurality of current signal contacts to simultaneously abut against the tray 1. The plurality of current signal contacts are evenly spaced along the transmission direction of the transmission device 4. The first driving member 62 and the second driving member in this embodiment both adopt driving cylinders, and the first driving member 62 and the second driving member share the same cylinder, which can simultaneously drive the power supply contacts 61 of the power supply device 6 and the current signal contacts of the temperature measuring device to move up and down to abut against the tray 1 or move away from the tray 1, so that the power supply and temperature measurement of the tray 1 are synchronized.

[0034] As Figure 2 and Figure 5As shown, the power supply device 6 and the temperature measuring device are respectively arranged on both sides of the tray 1, and contact contacts 11 are respectively arranged at positions on both sides of the tray 1 corresponding to the current signal contacts and the power supply contacts 61. A contact contact 11 is arranged at a position on one side of the tray 1 corresponding to the current signal contact, and a contact contact 11 is arranged at a position on the other side of the tray 1 corresponding to the power supply contact 61. When the tray 1 is transported by the transport device 4 to a specified position in the furnace chamber 2, the driving cylinder drives a plurality of current signal contacts and a plurality of power supply contacts 61 to move downward simultaneously, so that the plurality of current signal contacts are in close contact with the contact contacts 11 on one side of the tray 1 to transmit weak electricity, and the plurality of power supply contacts 61 are in close contact with the contact contacts 11 on the other side of the tray 1 to transmit strong electricity. In this embodiment, the power supply contacts of the power supply device 6 and the current signal contacts of the temperature measuring device are both abutted against the contact contacts 11 on the tray 1, so as to realize the power supply and heating of the tray 1 by the power supply device 6 and the real-time monitoring of the temperature of the tray 1 by the temperature measuring device. When the lithium battery on the tray 1 is preheated to a preset temperature, the driving cylinder drives a plurality of current signal contacts and a plurality of power supply contacts 61 to move upward simultaneously, away from the contact contacts 11 on both sides of the tray 1 and without interfering with the movement of the tray 1, ending the heating of the tray 1 by the power supply device 6 and the monitoring of the temperature of the tray 1 by the temperature measuring device.

[0035] Specifically, the air inlet mechanism 51 includes a blower 511 and an air inlet hood 512. The air outlet of the blower 511 is communicated with the air inlet of the air inlet hood 512, and the air outlet of the air inlet hood 512 is communicated with the furnace chamber 2. The heating mechanism 53 is arranged close to the air inlet hood 512; the air return mechanism 52 includes an air return hood 521. The air inlet of the air return hood 521 is communicated with the furnace chamber 2, and the air outlet of the air return hood 521 is communicated with the air inlet of the blower 511 through an air return pipe 522. As Figures 1 to 4 shown, the air inlet hood 512 of this embodiment is arranged in a gradually expanding manner. The air inlet hood 512 arranged in a gradually expanding manner can more quickly spread the air blown by the blower 511, so as to heat the tray 1 and the battery on the tray 1 more evenly. The air return hood 521 of this embodiment is arranged in a gradually shrinking manner. The air return hood 521 arranged in a gradually shrinking manner can accelerate the hot air entering the air return mechanism 52. When the preheating furnace 100 of this embodiment heats the tray 1 and the lithium battery on the tray 1, the blower 511 blows air, and the air is diffused into the furnace chamber 2 by the air inlet hood 512. The heating device in the furnace chamber 2 heats the air in the furnace chamber 2 to form hot air. Part of the hot air flows back into the air return hood 521 and returns to the blower 511 through the air return pipe 522 communicated with the air return hood 521. Then, the blower 511 blows the returned hot air into the furnace chamber 2. Since the air passing through the air return mechanism 52 still has a certain temperature, allowing it to enter the furnace chamber 2 again to preheat the tray 1 and the battery on the tray 1 can save energy. In this embodiment, the hot air circulation heating is realized through the air return hood 521 and the air return pipe 522, improving the preheating efficiency of the preheating furnace 100 for the tray 1 and the lithium battery on the tray 1.

[0036] It should be noted that the heating mechanism 53 includes a plurality of electric heating tubes 531. A plurality of air guide plates 5121 are arranged in the air inlet hood 512. An air guide channel 5122 is formed between any two adjacent air guide plates 5121, and an electric heating tube 531 is correspondingly arranged for each air guide channel 5122. The electric heating tube 531 in this embodiment can quickly heat the air blown in by the fan 511, so as to reach the preset temperature for preheating the lithium battery. The electric heating tubes 531 in this embodiment are arranged in upper and lower layers. The two layers of electric heating tubes 531 are both arranged in parallel at one end of the furnace chamber 2 close to the air inlet mechanism 51. Arranging the two layers of electric heating tubes 531 can heat the air more efficiently, thereby improving the preheating efficiency. The air guide plate 5121 in this embodiment can guide the air blown in by the fan 511. The air can only be blown into the furnace chamber 2 through the air guide channel 5122 between the air guide plates 5121. The electric heating tube 531 is arranged corresponding to the air guide channel 5122, which can ensure that the electric heating tube 531 fully heats the air blown by the fan 511.

[0037] As Figures 1 to 5 shown, the air inlet mechanism 51 in this embodiment is arranged at the top of the furnace chamber 2, and the air return mechanism 52 is arranged at the bottom of the furnace chamber 2. The air inlet mechanism 51 is located above the furnace chamber 2, and the air return mechanism 52 is located below the furnace chamber 2. The heating mechanism 53 in this embodiment is arranged at the top inside the furnace chamber 2 corresponding to the air inlet mechanism 51. By arranging the air inlet mechanism 51 of this embodiment at the top of the furnace chamber 2 and the air return mechanism 52 at the bottom of the furnace chamber 2, the recycled hot air has a certain temperature and a lower density, and can quickly rise and flow back into the air inlet mechanism 51, accelerating the hot air circulation in the preheating furnace 100. The rapid circulation of the hot air improves the preheating efficiency of the preheating furnace 100 for the lithium battery.

[0038] In this embodiment, a plurality of preheating devices 5 are sequentially arranged on the furnace chamber 2 along the transmission direction of the transmission device 4. A plurality of preheating devices 5 are arranged on the furnace chamber 2 of a preheating furnace 100, which can improve the preheating efficiency of the preheating furnace 100 for the lithium battery. As Figures 1 to 4 shown, this embodiment preferably sets two preheating devices 5 for each furnace chamber 2, which can effectively improve the preheating efficiency of the preheating furnace 100. A temperature control mechanism is further arranged outside the furnace chamber 2 of this embodiment. The temperature control mechanism is electrically connected to both the heating mechanism 53 and the power supply device 6. The temperature control mechanism is used to control the output power of the heating device and the power supply device 6. It should be noted that in this embodiment, a temperature sensor is arranged at the top inside the furnace chamber 2. The temperature sensor transmits the temperature information inside the furnace chamber 2 to the temperature control mechanism arranged outside the furnace chamber 2 in real time. The temperature control mechanism controls the heating power of the heating device and the power supply power of the power supply device 6 in a negative feedback manner, and then controls the temperature inside the furnace chamber 2 within the preset temperature range required for preheating the lithium battery, so as to realize uniform preheating of the lithium battery.

[0039] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present invention.

Claims

1. A preheating furnace for preheating electronic components loaded on a tray, the preheating furnace comprising a furnace chamber, openings being provided on opposite sides of the furnace chamber, the furnace chamber further being provided with a sealing door for opening or closing the openings, and a conveying device for conveying the tray being provided in the furnace chamber; characterized in that, The preheating furnace further includes: A preheating device, including an air inlet mechanism, a heating mechanism, and an air return mechanism. The air inlet mechanism and the air return mechanism are arranged outside the furnace chamber and are both communicated with the furnace chamber. The heating mechanism is arranged inside the furnace chamber and is located between the air inlet mechanism and the air return mechanism; The air inlet mechanism includes a fan and an air inlet hood. The air outlet of the fan is communicated with the air inlet of the air inlet hood, the air outlet of the air inlet hood is communicated with the furnace chamber, and the heating mechanism is arranged close to the air inlet hood; The air return mechanism includes an air return hood. The air inlet of the air return hood is communicated with the furnace chamber, and the air outlet of the air return hood is communicated with the air inlet of the fan through an air return pipe; The heating mechanism includes a plurality of electric heating tubes. A plurality of air guiding plates are arranged in the air inlet hood. An air guiding channel is formed between any two adjacent air guiding plates, and each air guiding channel is correspondingly provided with one electric heating tube; A power supply device, arranged inside the furnace chamber and used for supplying power to the tray. The tray includes a heating element. The power supply device is used for supplying power to the heating element so that the heating element generates heat to heat the electronic components. The power supply device includes a first driving member and a plurality of power supply contact heads arranged at intervals. The first driving member is used for driving the plurality of power supply contact heads to simultaneously abut against the tray; The preheating furnace further includes a temperature measuring device arranged inside the furnace chamber. The temperature measuring device is used for detecting the temperature of the tray. The temperature measuring device includes a second driving member and a plurality of current signal contact heads arranged at intervals. The second driving member is used for driving the plurality of current signal contact heads to simultaneously abut against the tray; The power supply device and the temperature measuring device are respectively arranged on both sides of the tray, and contact contacts are respectively arranged at positions on both sides of the tray corresponding to the current signal contact heads and the power supply contact heads; The first driving member and the second driving member share a cylinder.

2. The preheating furnace according to any one of claims 1, characterized in that The air inlet mechanism is arranged at the top of the furnace chamber, and the air return mechanism is arranged at the bottom of the furnace chamber.

3. The preheating furnace according to any one of claims 1, characterized in that A plurality of preheating devices are sequentially arranged on the furnace chamber along the transmission direction of the transmission device.

4. The preheating furnace according to any one of claims 1, wherein A temperature control mechanism electrically connected to the heating mechanism and the power supply device is further arranged outside the furnace chamber. The temperature control mechanism is used for controlling the output power of the heating mechanism and the power supply device.

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