JP6784980B2 - Cooling device for high temperature parts - Google Patents

Cooling device for high temperature parts Download PDF

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JP6784980B2
JP6784980B2 JP2017128746A JP2017128746A JP6784980B2 JP 6784980 B2 JP6784980 B2 JP 6784980B2 JP 2017128746 A JP2017128746 A JP 2017128746A JP 2017128746 A JP2017128746 A JP 2017128746A JP 6784980 B2 JP6784980 B2 JP 6784980B2
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cooling
carry
cooling air
temperature parts
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茂之 中村
茂之 中村
利光 藤原
利光 藤原
尚吾 泉
尚吾 泉
奉文 神立
奉文 神立
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Toyota Motor Corp
Tokuden Co Ltd Kyoto
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Description

本発明は、鋳造直後の鋳造粗材などの高温部品を冷却するための冷却装置に関する。 The present invention relates to a cooling device for cooling a high temperature part such as a cast rough material immediately after casting.

アルミ等を材料とする鋳造粗材から製作される製品は、鋳造直後の高温域から作業者が取り扱うことのできる程度の低温域まで冷却される。そして、製品の生産能率を維持・向上させるためには、冷却効率を高め、できる限り急速に冷却する必要があることから、鋳造粗材等の高温部品を順次長手方向に、断続的に移送させる冷却装置が提案されている（例えば、特許文献１参照。）。 Products made from rough castings made of aluminum or the like are cooled from a high temperature range immediately after casting to a low temperature range that can be handled by workers. Then, in order to maintain and improve the production efficiency of the product, it is necessary to increase the cooling efficiency and cool as quickly as possible. Therefore, high-temperature parts such as cast rough materials are sequentially and intermittently transferred in the longitudinal direction. A cooling device has been proposed (see, for example, Patent Document 1).

図３は、従来の冷却装置の構成例を示す斜視図である。 FIG. 3 is a perspective view showing a configuration example of a conventional cooling device.

冷却装置１００は、鋳造粗材１０１を収容する冷却室１０２と、鋳造粗材１０１を移送する搬送部１０３と、冷却室１０２に冷却用空気を送風する冷却用空気供給部１０４と、上部空間が冷却室と連通し下部空間が水槽となっている水槽容器１０５と、水槽容器１０５の上部空間に水を噴霧する噴霧部１０６とを備えており、冷却用空気供給部１０４によって冷却用空気を冷却室１０２と水槽容器１０５との間で循環させるとともに、噴霧部１０６によって水槽容器１０５内の冷却用空気を冷却するものである。この冷却装置１００は、高温部品へ冷却用空気を上方から吹き付ける上方吹出し部１０７に加えて、冷却用空気を側方から吹き付ける側方吹出し部１０９を備えることで、冷却用空気が当たる面積を増加させて、冷却能力の向上を図るというものである。 The cooling device 100 includes a cooling chamber 102 for accommodating the cast rough material 101, a transport unit 103 for transferring the cast rough material 101, a cooling air supply unit 104 for blowing cooling air to the cooling chamber 102, and an upper space. It is provided with a water tank container 105 that communicates with the cooling chamber and has a water tank in the lower space, and a spray unit 106 that sprays water into the upper space of the water tank container 105, and the cooling air is cooled by the cooling air supply unit 104. It is circulated between the chamber 102 and the water tank container 105, and the cooling air in the water tank container 105 is cooled by the spray unit 106. The cooling device 100 includes an upper blowing portion 107 that blows cooling air from above onto high-temperature parts, and a side blowing portion 109 that blows cooling air from the side, thereby increasing the area exposed to the cooling air. This is to improve the cooling capacity.

特開２０１０−６０１８４号公報Japanese Unexamined Patent Publication No. 2010-60184

上記特許文献１の冷却装置は優れた冷却能力を発揮し、所定時間内に鋳造粗材の表面を作業者が触れる程度の温度域にまで冷却可能である。しかしながら、水を使用するため循環ポンプや熱交換器ユニットが不可欠であり、それに伴う配管やバルブ類も必要となるため、冷却装置全体の構造が複雑になるという問題がある。 The cooling device of Patent Document 1 exhibits excellent cooling capacity, and can cool the surface of the cast rough material to a temperature range that the operator can touch within a predetermined time. However, since water is used, a circulation pump and a heat exchanger unit are indispensable, and piping and valves associated therewith are also required, so that there is a problem that the structure of the entire cooling device becomes complicated.

また、装置内の水が鋳造粗材等に付着していた粉塵や砂を含んで汚れるため、定期的に水槽内の水を交換しなければならず、ポンプユニット等の清掃といった装置の保全作業に手間がかかるという問題もある。 In addition, since the water in the equipment becomes dirty including dust and sand adhering to the coarse casting material, the water in the water tank must be replaced regularly, and maintenance work such as cleaning the pump unit etc. There is also the problem that it takes time and effort.

そこで、本発明は、上記のような問題点に鑑みなされたものであり、水を使用することなく鋳造粗材等の高温部品を冷却することができ、かつ、粉塵や砂を回収することができて、保全コストに優れた高温部品の冷却装置を提供することを目的とする。 Therefore, the present invention has been made in view of the above-mentioned problems, and it is possible to cool high-temperature parts such as cast crude materials without using water, and to recover dust and sand. It is an object of the present invention to provide a cooling device for high temperature parts which can be formed and has excellent maintenance cost.

上記の課題を解決するため、本発明に係る高温部品の冷却装置は、高温部品を装置内へ搬入する搬入部と、搬入された高温部品に冷却用空気を吹き付けて冷却する冷却部と、前記冷却部へ冷却用空気を供給する送風部と、冷却された高温部品を装置外へ搬出する搬出部と、前記冷却部において高温部品に吹き付けられた冷却用空気に含まれる高温部品に付着していた粉塵等を捕集し、捕集後の冷却用空気を排出する集塵部とを備えることを特徴とする。 In order to solve the above problems, the cooling device for high-temperature parts according to the present invention includes a carry-in unit that carries the high-temperature parts into the device, a cooling part that blows cooling air onto the carried-in high-temperature parts to cool them, and the above. It adheres to the air blower that supplies cooling air to the cooling unit, the carry-out unit that carries the cooled high-temperature parts out of the device, and the high-temperature parts contained in the cooling air that is blown onto the high-temperature parts in the cooling unit. It is characterized by being provided with a dust collecting unit that collects dust and the like and discharges cooling air after collection.

これによれば、水を使用せずに冷却用空気のみで鋳造粗材等の高温部品の冷却をし、粉塵や砂の回収もするので、装置の構造を簡素化することができる。また、集塵部の消耗品の交換程度で済むので保全コストに優れた冷却装置が実現される。 According to this, high-temperature parts such as cast rough materials are cooled only with cooling air without using water, and dust and sand are also collected, so that the structure of the apparatus can be simplified. In addition, since it is only necessary to replace the consumables of the dust collecting part, a cooling device having excellent maintenance cost is realized.

ここで、前記搬入部および前記搬出部の開閉状態を検出する扉状態検出部を備えるのが好ましい。 Here, it is preferable to include a door state detection unit that detects the open / closed state of the carry-in portion and the carry-out portion.

また、前記送風部は、電動機周波数を調整することにより冷却部へ供給する冷却用空気の風量を調整する周波数調整部を備えるのが好ましい。 Further, it is preferable that the blower unit includes a frequency adjusting unit that adjusts the air volume of the cooling air supplied to the cooling unit by adjusting the frequency of the electric motor.

さらに、前記周波数調整部は、前記扉状態検出部における検出結果に基づいて、電動機周波数を調整するのがより好ましい。 Further, it is more preferable that the frequency adjusting unit adjusts the motor frequency based on the detection result in the door state detecting unit.

これによれば、搬入扉および搬出扉の開閉状態に応じて冷却用空気の風量を調整するので、粉塵や砂を飛散させることがない工場内環境への配慮に優れた冷却装置が実現可能となる。 According to this, since the air volume of the cooling air is adjusted according to the open / closed state of the carry-in door and the carry-out door, it is possible to realize a cooling device that does not scatter dust and sand and is excellent in consideration of the environment in the factory. Become.

以上のように、本発明に係る高温部品の冷却装置によれば、水を使用することなく冷却用空気で鋳造粗材等の高温部品を冷却するとともに、粉塵や砂の回収も行うので、冷却装置全体を簡略化された構造とすることができ、保全コストにも優れた冷却装置が実現できる。 As described above, according to the cooling device for high-temperature parts according to the present invention, high-temperature parts such as cast rough materials are cooled with cooling air without using water, and dust and sand are also recovered. The entire device can have a simplified structure, and a cooling device with excellent maintenance cost can be realized.

本発明の実施の形態に係る冷却装置の機能的な構成を示すブロック図である。It is a block diagram which shows the functional structure of the cooling apparatus which concerns on embodiment of this invention. 冷却装置の構成例を示す斜視図である。It is a perspective view which shows the structural example of a cooling device. 従来の冷却装置の構成例を示す斜視図である。It is a perspective view which shows the structural example of the conventional cooling apparatus.

以下、本発明に係る高温部品の冷却装置について図を参照しながら説明する。 Hereinafter, the cooling device for high temperature parts according to the present invention will be described with reference to the drawings.

図１は、本発明の実施の形態に係る冷却装置の機能的な構成を示すブロック図である。 FIG. 1 is a block diagram showing a functional configuration of a cooling device according to an embodiment of the present invention.

冷却装置１は、高温部品である鋳造粗材を冷却する装置であり、鋳造粗材を装置内に取り入れる搬入部１０と、鋳造粗材を冷却する冷却部１１と、冷却した鋳造粗材を装置外へ排出する搬出部１２とを備えている。また、冷却装置１は、冷却のための冷却用空気（冷却風）を冷却部１１へ供給する送風部１３と、搬入部１０および搬出部１２の開閉状態を検出する扉状態検出部１５と、冷却部１１で冷却に用いた冷却風から粉塵や砂を回収する集塵部１６とを備えている。 The cooling device 1 is a device for cooling a casting rough material which is a high-temperature component, and is a device for carrying in a casting rough material into the device, a cooling unit 11 for cooling the casting rough material, and a cooled casting rough material. It is provided with a carry-out unit 12 for discharging to the outside. Further, the cooling device 1 includes a blower unit 13 that supplies cooling air (cooling air) for cooling to the cooling unit 11, a door state detection unit 15 that detects the open / closed state of the carry-in unit 10 and the carry-out unit 12. The cooling unit 11 includes a dust collecting unit 16 that collects dust and sand from the cooling air used for cooling.

搬入部１０は、鋳造粗材を装置内へ取り入れるための扉等である。搬入部１０の扉の開閉状態は、後述する扉状態検出部１５により常に検知されている。 The carry-in portion 10 is a door or the like for taking the cast rough material into the apparatus. The open / closed state of the door of the carry-in unit 10 is always detected by the door state detection unit 15 described later.

冷却部１１は、装置内へ取り入れられた鋳造粗材を冷却するための空間（冷却室）である。冷却部１１は、搬入部１０から装置内へ入った鋳造粗材を長手方向に順次移送する搬送部も有している。冷却部１１では、鋳造粗材を搬送部で移送しながら、送風部１３から供給される冷却風により鋳造粗材を冷却する。冷却に用いられた冷却風は、鋳造粗材に付着していた粉塵や砂とともに集塵部１６へ送られる。 The cooling unit 11 is a space (cooling chamber) for cooling the cast rough material taken into the apparatus. The cooling unit 11 also has a transport unit that sequentially transfers the cast rough material that has entered the apparatus from the carry-in unit 10 in the longitudinal direction. In the cooling unit 11, the cast rough material is cooled by the cooling air supplied from the blower unit 13 while the cast rough material is transferred by the transport unit. The cooling air used for cooling is sent to the dust collecting unit 16 together with the dust and sand adhering to the cast rough material.

搬出部１２は、冷却した鋳造粗材を装置外へ排出するための扉等である。搬出部１２の扉の開閉状態も、搬入部１０と同様に、後述する扉状態検出部１５により常に検知されている。 The carry-out unit 12 is a door or the like for discharging the cooled cast rough material to the outside of the apparatus. The open / closed state of the door of the carry-out unit 12 is also always detected by the door state detection unit 15 described later, similarly to the carry-in unit 10.

送風部１３は、冷却部１１へ供給する冷却風を発生させる送風機である。送風部１３は、冷却装置１が設置される工場等の施設内の新鮮な空気を取り込んで冷却部１１へ冷却風を送り込む。この送風部１３は、周波数調整部１４を備えている。 The blower unit 13 is a blower that generates cooling air to be supplied to the cooling unit 11. The blower unit 13 takes in fresh air in a facility such as a factory where the cooling device 1 is installed and sends the cooling air to the cooling unit 11. The blower unit 13 includes a frequency adjusting unit 14.

周波数調整部１４は、送風機の電動機周波数を制御する制御装置である。周波数調整部１４は、扉状態検出部１５の出力に基づいて電動機周波数を制御することにより、送風部１３から冷却部１１へ供給される冷却風の風量を調整する。 The frequency adjusting unit 14 is a control device that controls the electric motor frequency of the blower. The frequency adjusting unit 14 adjusts the air volume of the cooling air supplied from the blowing unit 13 to the cooling unit 11 by controlling the electric motor frequency based on the output of the door state detecting unit 15.

扉状態検出部１５は、搬入部１０および搬出部１２の扉の開閉状態を検出し、検出結果を周波数調整部１４へ出力する処理部であり、扉開閉センサ等により実現される。この扉状態検出部１５が搬入部１０および搬出部１２の両扉が開いた状態であることを検出した場合は、扉開放状態であることを周波数調整部１４へ出力し、周波数調整部１４は電動機周波数を低減して冷却風の風量を減ずる。これにより、粉塵や砂が両扉から装置外へ飛散することを抑止することができる。 The door state detection unit 15 is a processing unit that detects the open / closed state of the doors of the carry-in unit 10 and the carry-out unit 12 and outputs the detection result to the frequency adjustment unit 14, and is realized by a door open / close sensor or the like. When the door state detection unit 15 detects that both the doors of the carry-in unit 10 and the carry-out unit 12 are open, the door state detection unit 15 outputs to the frequency adjustment unit 14 that the door is open, and the frequency adjustment unit 14 outputs the door open state. Reduce the motor frequency to reduce the amount of cooling air. As a result, it is possible to prevent dust and sand from scattering from both doors to the outside of the device.

集塵部１６は、冷却部１１で冷却に用いた冷却風から粉塵や砂を捕集し回収する集塵フィルタや、粉塵や砂を回収した後の冷却風を装置外へ排出する排気用送風機により実現される。 The dust collecting unit 16 is a dust collecting filter that collects and collects dust and sand from the cooling air used for cooling by the cooling unit 11, and an exhaust blower that discharges the cooling air after collecting the dust and sand to the outside of the device. Is realized by.

図２は、冷却装置１の構成例を示す斜視図である。 FIG. 2 is a perspective view showing a configuration example of the cooling device 1.

冷却装置１は、搬入部１０に相当する搬入扉２０と、冷却部１１に相当する冷却室２１と、搬出部１２に相当する搬出扉２２と、送風部１３に相当する送風機２４および送風口２３とを備えている。搬入扉２０から装置内に取り込まれた鋳造粗材２は、冷却室２１において搬出扉２２の方向へ順次移送されながら、送風機２４から送り込まれて送風口２３から吹き出される冷却風により冷却され、搬出扉２２から排出される。送風機２４が発生させる冷却風は、大気であり、例えば、工場等施設内の室温程度の空気である。そのため、水を使用する必要がなく、循環ポンプや熱交換器ユニットだけでなく、配管やバルブ類も不要となるので、冷却装置全体の構造を簡素化できる。 The cooling device 1 includes a carry-in door 20 corresponding to the carry-in section 10, a cooling chamber 21 corresponding to the cooling section 11, a carry-out door 22 corresponding to the carry-out section 12, and a blower 24 and a blower port 23 corresponding to the blower section 13. And have. The cast rough material 2 taken into the apparatus from the carry-in door 20 is sequentially transferred in the direction of the carry-out door 22 in the cooling chamber 21, and is cooled by the cooling air sent from the blower 24 and blown out from the air outlet 23. It is discharged from the carry-out door 22. The cooling air generated by the blower 24 is the atmosphere, for example, air at about room temperature in a facility such as a factory. Therefore, it is not necessary to use water, and not only the circulation pump and the heat exchanger unit but also the piping and valves are unnecessary, so that the structure of the entire cooling device can be simplified.

冷却室２１内で冷却に用いられた冷却風は、冷却室２１と集塵ユニット２７とを連通する開口部２５を介して集塵ユニット２７へ送り込まれる。集塵ユニット２７は集塵部１６に相当し、集塵フィルタ２６および排気送風機２８を備えている。集塵フィルタ２６は、冷却に用いられた冷却風によって鋳造粗材２に付着していた粉塵や砂が集塵ユニット２７内へ送り込まれるので、これらの粉塵や砂を捕集し回収する。清浄化された冷却風は排気送風機２８により吸引されて、装置外へ放散される。ここで、集塵ユニット２７内に蓄積された粉塵や砂は集塵ユニット２７の清掃や消耗品である集塵フィルタ２６の交換程度で済むので、従来の水を使用した冷却装置に比べれば、ポンプユニット等の清掃といった煩雑な保全作業が不要となり、保全コストの点で有利となる。 The cooling air used for cooling in the cooling chamber 21 is sent to the dust collecting unit 27 through the opening 25 that communicates the cooling chamber 21 and the dust collecting unit 27. The dust collecting unit 27 corresponds to the dust collecting unit 16, and includes a dust collecting filter 26 and an exhaust blower 28. The dust collecting filter 26 collects and collects the dust and sand adhering to the cast rough material 2 by the cooling air used for cooling because the dust and sand are sent into the dust collecting unit 27. The cleaned cooling air is sucked by the exhaust blower 28 and dissipated to the outside of the device. Here, the dust and sand accumulated in the dust collecting unit 27 need only be cleaned of the dust collecting unit 27 and the replacement of the dust collecting filter 26 which is a consumable item. Therefore, compared to the conventional cooling device using water, Complicated maintenance work such as cleaning the pump unit is not required, which is advantageous in terms of maintenance cost.

送風機２４は、周波数調整部１４の機能も有しており、通常時は所定の周波数（例えば、60Hz）で運転されており、搬入扉２０および搬出扉２２が開いた状態のときは扉状態検出部１５に相当する扉開閉センサ（図示せず）がこれを検知し、周波数を自動的に低減させて（例えば、30Hz）、送風口２３から吹き出される風量を減ずる。これにより、鋳造粗材２に付着していた粉塵や砂が冷却室２１内に滞留していても、搬入扉２０および搬出扉２２から装置外へ粉塵や砂が飛散することを防ぐことができる。なお、周波数の低減率が低すぎると、風量の減少率も低くなり、粉塵や砂の飛散を抑止することが難しくなる。一方、周波数の低減率が１００％、すなわち、送風機２４を停止させることにしても停止時間が短時間であれば集塵ユニット２７の排気送風機２８の吸引力が冷却能力の低下を抑えるので支障をきたすことがない。 The blower 24 also has the function of the frequency adjusting unit 14, is normally operated at a predetermined frequency (for example, 60 Hz), and detects the door state when the carry-in door 20 and the carry-out door 22 are open. A door open / close sensor (not shown) corresponding to the unit 15 detects this and automatically reduces the frequency (for example, 30 Hz) to reduce the amount of air blown from the air outlet 23. As a result, even if the dust and sand adhering to the cast rough material 2 are retained in the cooling chamber 21, it is possible to prevent the dust and sand from scattering from the carry-in door 20 and the carry-out door 22 to the outside of the device. .. If the frequency reduction rate is too low, the air volume reduction rate will also be low, making it difficult to suppress the scattering of dust and sand. On the other hand, if the frequency reduction rate is 100%, that is, even if the blower 24 is stopped, if the stop time is short, the suction force of the exhaust blower 28 of the dust collecting unit 27 suppresses the decrease in the cooling capacity, which causes a problem. There is nothing to do.

このような構成を備える冷却装置１は、水を使用することなく鋳造粗材等の高温部品の冷却が可能であり、粉塵や砂の回収も可能となる。また、水を使用しないため、冷却装置全体の構造を簡素化することができ、保全コストに優れた冷却装置が実現される。 The cooling device 1 having such a configuration can cool high-temperature parts such as cast rough materials without using water, and can also recover dust and sand. Further, since water is not used, the structure of the entire cooling device can be simplified, and a cooling device having excellent maintenance cost can be realized.

以上、本発明に係る高温部品の冷却装置について、実施の形態に基づいて説明したが本発明はこれに限定されるものではなく、本発明の目的を達成でき、かつ発明の要旨を逸脱しない範囲内で種々設計変更が可能であり、それらも全て本発明の範囲内に包含されるものである。 Although the cooling device for high temperature parts according to the present invention has been described above based on the embodiment, the present invention is not limited to this, and the object of the present invention can be achieved and the gist of the present invention is not deviated. Various design changes can be made within the invention, all of which are included within the scope of the present invention.

例えば、上記実施の形態では、鋳造粗材を長手方向に順次移送して冷却する搬送式の冷却装置として説明したが、鋳造サイクルの１ショット（鋳造１回ごと）分の鋳造粗材を冷却室に搬入し冷却してから搬出する冷却サイクルと、鋳造サイクルとを適合させた、バッチ式の冷却装置に適用してもよい。 For example, in the above-described embodiment, the cast rough material has been described as a transport type cooling device that sequentially transfers and cools the cast rough material in the longitudinal direction, but the cast rough material for one shot (every casting) of the casting cycle is stored in the cooling chamber. It may be applied to a batch type cooling device in which a cooling cycle of carrying in and cooling and then carrying out is adapted to a casting cycle.

本発明に係る高温部品の冷却装置は、鋳造直後の鋳造粗材等の高温部品を急速に冷却するための冷却装置等として有用である。 The cooling device for high-temperature parts according to the present invention is useful as a cooling device or the like for rapidly cooling high-temperature parts such as a cast rough material immediately after casting.

１，１００ 冷却装置
２，１０１ 鋳造粗材
２１，１０２ 冷却室
１０ 搬入部
１１ 冷却部
１２ 搬出部
１３ 送風部
１４ 周波数調整部
１５ 扉状態検出部
１６ 集塵部
２０ 搬入扉
２２，１０８ 搬出扉
２３ 送風口
２４ 送風機
２５ 開口部
２６ 集塵フィルタ
２７ 集塵ユニット
２８ 排気送風機
１０３ 搬送部
１０４ 冷却用空気供給部
１０５ 水槽容器
１０６ 噴霧部
１０７ 上方吹出し部
１０９ 側方吹出し部 1,100 Cooling device 2,101 Casting rough material 21,102 Cooling room 10 Carry-in part 11 Cooling part 12 Carry-out part 13 Blower part 14 Frequency adjustment part 15 Door condition detection part 16 Dust collection part 20 Carry-in door 22,108 Carry-out door 23 Blower 24 Blower 25 Opening 26 Dust collection filter 27 Dust collection unit 28 Exhaust blower 103 Transport unit 104 Cooling air supply unit 105 Water tank container 106 Spray unit 107 Upper air outlet 109 Side air outlet

Claims (1)

高温部品を装置内へ搬入する搬入部と、
搬入された高温部品に冷却用空気を吹き付けて冷却する冷却部と、
前記冷却部へ冷却用空気を供給する送風部と、
冷却された高温部品を装置外へ搬出する搬出部と、
前記冷却部において高温部品に吹き付けられた冷却用空気に含まれる高温部品に付着していた粉塵等を捕集し、捕集後の冷却用空気を排出する集塵部と、
前記搬入部および前記搬出部の開閉状態を検出する扉状態検出部とを備え、
前記送風部は、電動機周波数を調整することにより冷却部へ供給する冷却用空気の風量を調整する周波数調整部を備え、
前記周波数調整部は、前記扉状態検出部が前記搬入部および前記搬出部の両方が開状態であることを検出したときに電動機周波数を低減させ、
前記周波数調整部が電動機周波数を１００％低減させ、前記送風部が前記冷却部への冷却用空気の供給を停止したときに、前記集塵部が捕集後の冷却用空気の排出を継続している
ことを特徴とする高温部品の冷却装置。 A carry-in section that carries high-temperature parts into the equipment,
A cooling unit that blows cooling air onto the high-temperature parts that have been brought in to cool it.
A blower that supplies cooling air to the cooling unit and
A carry-out part that carries out the cooled high-temperature parts to the outside of the device,
A dust collecting unit that collects dust and the like adhering to high-temperature parts contained in the cooling air blown to the high-temperature parts in the cooling unit and discharges the collected cooling air .
A door state detection unit for detecting the open / closed state of the carry-in part and the carry-out part is provided.
The blower unit includes a frequency adjustment unit that adjusts the amount of cooling air supplied to the cooling unit by adjusting the frequency of the electric motor.
The frequency adjusting unit reduces the motor frequency when the door state detecting unit detects that both the loading unit and the unloading unit are in the open state .
When the frequency adjusting unit reduces the motor frequency by 100% and the blowing unit stops supplying cooling air to the cooling unit, the dust collecting unit continues to discharge the cooling air after collection. A cooling device for high-temperature parts, which is characterized by being
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