Efficient multi-stage drying device for processing of pickled mustard

Abstract

The utility model discloses a kind of efficient multistage drying devices for processing tribute vegetable, relate to agricultural product processing technical field, including machine body, multiple compartments are separated by multiple partitions in machine body, multiple transmission mechanisms are equipped on each partition, drying assembly and moisture retaining assembly are equipped on the machine body corresponding each chamber, and humidity sensor is equipped in each chamber, the continuous transmission of tribute vegetable is realized by multiple transmission mechanisms in the design, the phased regulation and control of combination drying assembly and moisture retaining assembly, cooperate the real-time monitoring of humidity sensor, solve the problems, such as low efficiency, uneven drying, tribute vegetable quality degradation of traditional drying equipment, with the advantages, such as high drying efficiency, tribute vegetable quality good.

Description

Technical Field

[0001] This utility model relates to the field of agricultural product processing, and in particular to a high-efficiency multi-stage drying device for processing tribute vegetables. Background Technology

[0002] Drying is a crucial step in the processing of dried gongcai (a type of dried vegetable), directly affecting the product's quality, taste, and shelf life. Current technologies for drying dried gongcai mainly suffer from the following technical deficiencies:

[0003] 1. Low drying efficiency and high energy consumption: Traditional natural sun drying is greatly restricted by the weather and has a long cycle; single hot air drying room often uses constant or simply changing drying parameters (such as high temperature and large air volume). The moisture evaporates quickly in the early stage but the efficiency is low in the later stage, and it is easy to cause the outside of the dried vegetables to be scorched and the inside to be wet ("shelling" phenomenon). The overall drying time is long and the unit energy consumption is high.

[0004] 2. Uneven drying and inconsistent quality: Uneven airflow distribution in the drying chamber, inconsistent material stacking thickness, or untimely turning can lead to large differences in the degree of drying of the same batch or even within the same batch of dried vegetables, resulting in inconsistent color, rehydration properties, and taste, which affects the product grade and price.

[0005] 3. Deterioration of color and taste: Excessive drying temperature (especially in the early stage) or excessive drying time can easily lead to the loss of chlorophyll, vitamins and other substances in the dried vegetables, causing browning (yellowing and darkening), poor rehydration, and difficulty in maintaining the unique bright green color and crisp taste.

[0006] Therefore, this utility model provides a high-efficiency multi-stage drying device for processing tribute vegetables. Utility Model Content

[0007] To address the shortcomings of existing technologies, this utility model provides a high-efficiency multi-stage drying device for processing dried vegetables, which solves the problems mentioned in the background.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a high-efficiency multi-stage drying device for processing dried vegetables, comprising a body, and further comprising:

[0009] Multiple partitions are installed inside the machine body, dividing the machine body into multiple chambers from top to bottom;

[0010] A multi-stage transmission mechanism is installed inside the machine body on each of the partitions for multi-stage transmission of the dried vegetables;

[0011] A drying assembly, installed on the machine body and located above each of the partitions, is used to dry the dried vegetables transported on the multi-stage conveying mechanism.

[0012] A humidifying component, located on the machine body, is used to humidify the dried vegetables on the multi-stage transmission mechanism.

[0013] Multiple temperature and humidity sensors are installed in each chamber inside the machine body to monitor the temperature and humidity within the chamber.

[0014] As a further technical solution of this utility model, a feeding port is provided on one side of the top of the machine body, and a discharge port is provided at the lower end of the other side of the machine body. A control panel is installed on the outer side of the machine body, and self-locking universal wheels are provided at the four corners of the bottom of the machine body.

[0015] As a further technical solution of this utility model, the multi-stage transmission mechanism includes a first transmission belt, a second transmission belt and a third transmission belt arranged sequentially from top to bottom. A set of active rollers are symmetrically installed at both ends of the inner side of the first transmission belt, the second transmission belt and the third transmission belt. A driven roller is provided at the middle of the inner side of the first transmission belt, the second transmission belt and the third transmission belt. Both ends of the active roller and the driven roller are fixed to the partition plate by a bearing seat.

[0016] Three drive motors are mounted on the machine body via a motor frame. The output ends of the three drive motors are respectively fixed to one end of one of the drive rollers inside the first, second, and third conveyor belts.

[0017] As a further technical solution of this utility model, the surface of the uppermost partition is provided with a first discharge port at the discharge end of the first conveyor belt, the discharge port of the upper discharge port is located directly above the feed end of the first conveyor belt, and the discharge port of the first discharge port is located directly above the feed end of the second conveyor belt.

[0018] The middle layer of the partition plate has a second discharge port near the material drop end of the second conveyor belt, and the discharge port of the second discharge port is located at the material inlet end of the third conveyor belt.

[0019] The bottommost partition surface has a discharge port corresponding to the outlet, and the drop port of the third conveyor belt corresponds to the discharge port, and the discharge port is connected to the outlet.

[0020] As a further technical solution of this utility model, the moisturizing component includes a water tank installed at the bottom of the outer side of the machine body. A main delivery pipe is provided through the water tank. Three branch pipes are branched from the main delivery pipe. One end of each branch pipe is connected to a spray plate. Atomizing nozzles are evenly distributed on the lower surface of the spray plate. The spray plate is a hollow structure, and the atomizing nozzles are connected to the spray plate.

[0021] Each of the spray plates is located above the middle of the first, second, and third conveyor belts, respectively.

[0022] As a further technical solution of this utility model, a pump is also provided at the bottom of the water tank, and the output end of the pump is connected to the main delivery pipe. A control valve is provided on the main delivery pipe between every two branch pipes, and a water inlet is also provided on the water tank.

[0023] As a further technical solution of this utility model, the drying component includes a high-temperature fan, a medium-temperature fan and a low-temperature fan installed on the outer side of the machine body, and a drying mechanism is connected to each of the high-temperature fan, the medium-temperature fan and the low-temperature fan.

[0024] The drying mechanism includes a main air duct connected to the output end of a high-temperature fan. The other end of the main air duct, located inside the machine body, is connected to a main air plate. An upper air plate and a lower air plate are symmetrically arranged on the other side of the main air plate. The interior of the upper air plate, the lower air plate, and the main air plate are all hollow structures. The upper air plate and the lower air plate are both connected to the main air duct through the main air plate.

[0025] As a further technical solution of this utility model, the lower surface of the upper air blowing plate and the upper surface of the lower air blowing plate are both arrayed with multiple air outlets. The upper air blowing plate is located directly above the first conveyor belt, and the lower air blowing plate is located in the middle of the inner side of the first conveyor belt.

[0026] The drying mechanism connected to one end of the high-temperature fan, medium-temperature fan and low-temperature fan has the same structure, is located in each chamber, and corresponds to the first conveyor belt, the second conveyor belt and the third conveyor belt respectively. The temperature and humidity sensor is installed on the upper air blowing plate.

[0027] This utility model provides a high-efficiency multi-stage drying device for processing dried vegetables, which has the following advantages compared with the prior art:

[0028] 1. This design is a high-efficiency multi-stage drying device for processing dried vegetables. It adopts multi-stage zoned drying. During the high moisture stage, a high-temperature fan is used to quickly remove free water. During the slow-down drying stage, a medium-temperature fan is used to promote the diffusion of internal moisture. When the moisture content is close to the safe level, a low-temperature fan is used for slow drying. This design significantly shortens the total drying time. Compared with the traditional single-stage drying room, this design can shorten the drying time, improve the drying efficiency, and realize continuous production.

[0029] 2. This design provides a high-efficiency multi-stage drying device for processing dried vegetables. It adopts temperature control in multiple chambers to achieve phased temperature regulation, avoiding the loss of chlorophyll and vitamins and browning caused by high temperature in the early stage, and effectively protecting the effective components and natural color of dried vegetables in the low-temperature final drying stage.

[0030] 3. This design provides a high-efficiency multi-stage drying device for processing dried vegetables. The drying mechanism adopts an upper and lower air blowing design, so that the airflow passes evenly through the perforations of the conveyor belt and the gaps between materials, reducing the phenomenon of "air short circuit". During the multi-stage transmission process, the dried vegetables are naturally turned over. With the real-time monitoring of temperature and humidity sensors and the precise control of the control panel, it is ensured that the dried vegetables of the same batch are highly consistent in drying degree, with a uniform bright green color, good rehydration, and crisp taste, which significantly improves the rate of high-quality products. Attached Figure Description

[0031] Figure 1 A first structural perspective view of a high-efficiency multi-stage drying device for processing tribute vegetables;

[0032] Figure 2 A second structural perspective view of a high-efficiency multi-stage drying device for processing tribute vegetables;

[0033] Figure 3 A first-view perspective view of the internal structure of a high-efficiency multi-stage drying device for processing tribute vegetables;

[0034] Figure 4 A second perspective view of the internal structure of a high-efficiency multi-stage drying device for processing tribute vegetables;

[0035] Figure 5 This is a schematic diagram of the multi-stage transmission mechanism in a high-efficiency multi-stage drying device for processing preserved vegetables.

[0036] Figure 6 This is a schematic diagram of the moisture-retaining component in a high-efficiency multi-stage drying device for processing dried vegetables.

[0037] Figure 7 A first structural view of the drying components in a high-efficiency multi-stage drying device for processing preserved vegetables;

[0038] Figure 8 This is a second structural perspective view of the drying components in a high-efficiency multi-stage drying device for processing preserved vegetables.

[0039] In the diagram: 1. Machine body; 11. Feed port; 12. Discharge port; 13. Control panel;

[0040] 2. Humidification components; 21. Water tank; 22. Main delivery pipe; 23. Branch pipe; 24. Spray plate; 25. Atomizing nozzle; 26. Control valve;

[0041] 3. Drying components; 31. Main air deflector; 32. Upper air deflector; 33. Lower air deflector; 34. Main air duct; 35. High-temperature fan; 36. Medium-temperature fan; 37. Low-temperature fan;

[0042] 4. Multi-stage transmission mechanism; 41. First conveyor belt; 42. First discharge port; 43. Second conveyor belt; 44. Second discharge port; 45. Third conveyor belt; 46. Driven roller; 47. Driven roller;

[0043] 5. Temperature and humidity sensor; 6. Partition. Detailed Implementation

[0044] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0045] Please see Figure 1 This utility model provides a technical solution for a high-efficiency multi-stage drying device for processing dried vegetables: A high-efficiency multi-stage drying device for processing dried vegetables includes a body 1 and multiple partitions 6 installed inside the body 1, which divide the body 1 into multiple chambers from top to bottom. A feeding port 11 is provided on one side of the top of the body 1, and a discharging port 12 is provided at the lower end of the other side of the body 1. A control panel 13 is installed on the outer side of the body 1, and self-locking casters are provided at the four corners of the bottom of the body 1. The feeding port 11 on one side of the top of the body 1 is used for feeding dried vegetables, and the self-locking casters at the bottom facilitate the device to be moved to a designated position and then fixed.

[0046] like Figure 3-5 As shown, it also includes a multi-stage transmission mechanism 4, which is set inside the machine body 1 on each partition 6 for multi-stage transmission of the dried vegetables. The multi-stage transmission mechanism 4 includes a first transmission belt 41, a second transmission belt 43, and a third transmission belt 45 arranged sequentially from top to bottom. The surfaces of the first transmission belt 41, the second transmission belt 43, and the third transmission belt 45 are evenly distributed with perforations. The perforated design of the transmission belt makes it easier for the upper and lower air blowing plates to dry the dried vegetables. A set of active rollers 46 are symmetrically installed at both ends of the inner side of the first transmission belt 41, the second transmission belt 43, and the third transmission belt 45. A driven roller 47 is set in the middle of the inner side of the first transmission belt 41, the second transmission belt 43, and the third transmission belt 45. The ends of the active rollers 46 and the driven rollers 47 are fixed to the partition 6 by bearing seats. The purpose of the driven rollers 47 is to support the middle of the transmission belt and ensure that the transmission belt will not collapse during long-term use and affect the conveying of the dried vegetables.

[0047] Three drive motors are mounted on the machine body 1 via a motor frame. The output ends of the three drive motors are respectively fixed to one end of one of the drive rollers 46 inside the first conveyor belt 41, the second conveyor belt 43, and the third conveyor belt 45.

[0048] like Figure 5 As shown, the surface of the uppermost partition 6 is provided with a first discharge port 42 corresponding to the discharge end of the first conveyor belt 41. The discharge port of the upper discharge port 11 is located directly above the feed end of the first conveyor belt 41, and the discharge port of the first discharge port 42 is located directly above the feed end of the second conveyor belt 43. The surface of the middle partition 6 is provided with a second discharge port 44 near the discharge end of the second conveyor belt 43. The discharge port of the second discharge port 44 is located at the feed end of the third conveyor belt 45. The surface of the bottommost partition 6 is provided with a discharge port corresponding to the discharge port 12. The discharge port of the third conveyor belt 45 corresponds to the discharge port, and the discharge port is connected to the discharge port 12. When the dried vegetables are transported by the first conveyor belt 41 (i.e., the first drying process), When the dried vegetables fall onto the second conveyor belt 43 (i.e., the second drying chamber), they will tumble as they fall, thereby improving the drying efficiency. Then, they are conveyed by the second conveyor belt 43 to the third conveyor belt 45 (i.e., the third drying chamber). It should be added that the first drying chamber, the second drying chamber, and the third drying chamber can be connected by the first discharge port 42, the second discharge port 44, and the discharge port to facilitate the flow of hot air, which is then discharged from the discharge port 12. Moreover, the high-temperature hot air from the first drying chamber will also flow into the second drying chamber for further use, and the medium-temperature hot air from the second drying chamber will further flow into the third drying chamber for further drying of the dried vegetables.

[0049] like Figure 8 As shown, it also includes a drying component 3, which is installed on the body 1 and located above each partition 6, for drying the dried vegetables transported on the multi-stage transmission mechanism 4. The drying component 3 includes a high-temperature fan 35, a medium-temperature fan 36 and a low-temperature fan 37 installed on the outer side of the body 1. The high-temperature fan 35, the medium-temperature fan 36 and the low-temperature fan 37 are all connected to a drying mechanism.

[0050] like Figure 8 As shown, the drying mechanism includes a main air duct 34 connected to the output end of a high-temperature fan 35. The other end of the main air duct 34, located inside the body 1, is connected to a main air plate 31. On the other side of the main air plate 31, an upper air plate 32 and a lower air plate 33 are symmetrically arranged. The interiors of the upper air plate 32, the lower air plate 33, and the main air plate 31 are all hollow structures. The upper air plate 32 and the lower air plate 33 are both connected to the main air duct 34 through the main air plate 31. Multiple air outlets are arrayed on the lower surface of the upper air plate 32 and the upper surface of the lower air plate 33. The upper air plate 32 is located directly above the first conveyor belt 41, and the lower air plate 33 is located in the middle of the inner side of the first conveyor belt 41. The drying mechanism adopts an upper and lower air plate opposing design, which facilitates the airflow to pass evenly through the perforations of the conveyor belt and the gaps between materials during the drying process of the dried vegetables, reducing the phenomenon of "air short circuit".

[0051] The drying mechanism connected to one end of the high-temperature fan 35, the medium-temperature fan 36, and the low-temperature fan 37 has the same structure. They are located in each chamber and correspond to the first conveyor belt 41, the second conveyor belt 43, and the third conveyor belt 45, respectively. The temperature and humidity sensor 5 is installed on the upper air blowing plate 32 to facilitate real-time monitoring of the temperature and humidity in each chamber. When the temperature and humidity in the corresponding chamber are too low or too high, the humidification component 2 and the drying mechanism are activated to adjust the temperature and humidity in the chamber.

[0052] like Figure 7 As shown, it also includes a humidifying component 2, which is installed on the body 1 and is used to humidify the preserved vegetables on the multi-stage conveying mechanism 4. The humidifying component 2 includes a water tank 21 installed at the bottom of the outer side of the body 1. A main conveying pipe 22 is installed through the water tank 21. Three branch pipes 23 are branched from the main conveying pipe 22. One end of each branch pipe 23 is connected to a spray plate 24. Atomizing nozzles 25 are evenly distributed on the lower surface of the spray plate 24. The spray plate 24 is a hollow structure, and the atomizing nozzles 25 are connected to the spray plate 24. Each spray plate 24 is located above the middle of the first conveyor belt 41, the second conveyor belt 43, and the third conveyor belt 45, respectively. The purpose is to facilitate the operation of the humidifying component 2 when the temperature of the chamber is too high or the humidity is too low, so as to spray tap water into the corresponding chamber, thereby humidifying the preserved vegetables on the conveyor belt, avoiding the loss of chlorophyll and vitamins and browning caused by the initial high temperature, and effectively protecting the effective components and natural color of the preserved vegetables in the low-temperature final drying stage.

[0053] A pump is installed at the bottom of the water tank 21, and the output end of the pump is connected to the main delivery pipe 22. A control valve 26 is installed on the main delivery pipe 22 between every two branch pipes 23. A water inlet is also installed on the water tank 21, which can inject pure water or clean tap water into the water tank 21.

[0054] Multiple temperature and humidity sensors 5 are installed in each chamber inside the body 1 to monitor the temperature and humidity inside the chamber.

[0055] The working principle of this utility model is as follows: During operation, the dried vegetables fall from the feeding port 11 into the feeding end of the first conveyor belt 41. The control panel 13 starts the drive motor corresponding to the first conveyor belt 41, and the active roller 46 drives the first conveyor belt 41 to rotate. At the same time, the high-temperature fan 35 starts, and hot air enters the main air plate 31 through the main air pipe 34, and then is distributed to the upper air blowing plate 32 and the lower air blowing plate 33. The dried vegetables on the first conveyor belt 41 are dried by blowing air from top to bottom through the air outlet (removing free water). The temperature and humidity sensor 5 monitors the temperature and humidity in the chamber in real time, and the data is transmitted to the control panel 13. If the humidity is abnormal, the control panel 13 can control the control valve 26 of the corresponding branch pipe 23 in the humidification component 2 to open. The water pump in the water tank 21 sends water through the main conveying pipe 22 and the branch pipe 23 to the spray plate 24, and the dried vegetables are humidified and regulated through the atomizing nozzle 25.

[0056] At the same time, when the dried vegetables are transported to the discharge end by the first conveyor belt 41, they fall into the feed end of the second conveyor belt 43 through the first discharge port 42. The second conveyor belt 43 is driven by the drive motor, and the drying mechanism corresponding to the medium temperature fan 36 is started to dry the dried vegetables at a medium temperature (promoting the diffusion of internal moisture). The temperature and humidity sensor 5 and the humidification component 2 work together to regulate the temperature and humidity of the chamber.

[0057] Subsequently, the dried vegetables fall into the third conveyor belt 45 through the second feeding port 44. The drying mechanism corresponding to the low-temperature fan 37 is started to carry out low-temperature and low-humidity slow drying (to prevent over-drying). Finally, the dried vegetables are discharged from the discharge port 12 through the discharge port via the third conveyor belt 45, completing the drying process.

[0058] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model are implemented according to conventional methods in the art, unless otherwise specified or limited.

Claims

1. A high-efficiency multi-stage drying device for processing dried vegetables, comprising a body (1), characterized in that, Also includes: Multiple partitions (6) are installed inside the body (1) and divide the body (1) into multiple chambers from top to bottom; A multi-stage transmission mechanism (4) is provided inside the body (1) on each of the partitions (6) for multi-stage transmission of the dried vegetables; A drying assembly (3) is installed on the body (1) and located above each of the partitions (6) for drying the dried vegetables transported on the multi-stage conveying mechanism (4); A humidifying component (2) is provided on the body (1) for humidifying the dried vegetables on the multi-stage transmission mechanism (4); Multiple temperature and humidity sensors (5) are installed in each chamber inside the body (1) to monitor the temperature and humidity inside the chamber.

2. The high-efficiency multi-stage drying device for processing dried vegetables according to claim 1, characterized in that, The top side of the machine body (1) is provided with a feeding port (11), and the bottom side of the other side of the machine body (1) is provided with a discharge port (12). The outer side of the machine body (1) is equipped with a control panel (13), and the bottom four corners of the machine body (1) are provided with self-locking casters.

3. The high-efficiency multi-stage drying device for processing dried vegetables according to claim 2, characterized in that, The multi-level transmission mechanism (4) includes a first transmission belt (41), a second transmission belt (43) and a third transmission belt (45) arranged sequentially from top to bottom. The surfaces of the first transmission belt (41), the second transmission belt (43) and the third transmission belt (45) are uniformly distributed with perforations. A set of driving rollers (46) are symmetrically installed at both ends of the inner side of the first conveyor belt (41), the second conveyor belt (43) and the third conveyor belt (45). A driven roller (47) is provided at the middle of the inner side of the first conveyor belt (41), the second conveyor belt (43) and the third conveyor belt (45). Both ends of the driving roller (46) and the driven roller (47) are fixed on the partition plate (6) by the bearing seat. Three drive motors are mounted on the machine body (1) via a motor frame. The output ends of the three drive motors are respectively fixed to one end of one of the drive rollers (46) inside the first conveyor belt (41), the second conveyor belt (43), and the third conveyor belt (45).

4. The high-efficiency multi-stage drying device for processing dried vegetables according to claim 3, characterized in that, The uppermost partition (6) has a first discharge port (42) at the discharge end of the first conveyor belt (41). The discharge port of the feed port (11) is located directly above the feed end of the first conveyor belt (41), and the discharge port of the first discharge port (42) is located directly above the feed end of the second conveyor belt (43). The middle layer partition (6) has a second discharge port (44) near the material drop end of the second conveyor belt (43), and the discharge port of the second discharge port (44) is located at the material inlet end of the third conveyor belt (45). The bottom partition (6) has a discharge port on its surface corresponding to the discharge port (12). The drop port of the third conveyor belt (45) is opposite to the discharge port, and the discharge port is connected to the discharge port (12).

5. The high-efficiency multi-stage drying device for processing dried vegetables according to claim 1, characterized in that, The moisturizing component (2) includes a water tank (21) installed at the bottom of the outer side of the body (1). A main delivery pipe (22) is installed through the water tank (21). Three branch pipes (23) are branched from the main delivery pipe (22). One end of each branch pipe (23) is connected to a spray plate (24). Atomizing nozzles (25) are evenly distributed on the lower surface of the spray plate (24). The spray plate (24) is a hollow structure, and the atomizing nozzles (25) are connected to the spray plate (24). Each of the spray plates (24) is located above the middle of the first conveyor belt (41), the second conveyor belt (43), and the third conveyor belt (45), respectively.

6. The high-efficiency multi-stage drying device for processing dried vegetables according to claim 5, characterized in that, A pump is also provided at the bottom of the water tank (21), and the output end of the pump is connected to the main delivery pipe (22). A control valve (26) is provided on the main delivery pipe (22) between every two branch pipes (23). A water inlet is also provided on the water tank (21).

7. The high-efficiency multi-stage drying device for processing dried vegetables according to claim 1, characterized in that, The drying assembly (3) includes a high-temperature fan (35), a medium-temperature fan (36) and a low-temperature fan (37) installed on the outer side of the body (1), and each of the high-temperature fan (35), the medium-temperature fan (36) and the low-temperature fan (37) is connected to a drying mechanism. The drying mechanism includes a main air duct (34) connected to the output end of a high-temperature fan (35). The other end of the main air duct (34) and located inside the body (1) is connected to a main air plate (31). The other side of the main air plate (31) is symmetrically provided with an upper air plate (32) and a lower air plate (33). The interior of the upper air plate (32), the lower air plate (33) and the main air plate (31) are all hollow structures. The upper air plate (32) and the lower air plate (33) are both connected to the main air duct (34) through the main air plate (31).

8. The high-efficiency multi-stage drying device for processing dried vegetables according to claim 7, characterized in that, The lower surface of the upper air blowing plate (32) and the upper surface of the lower air blowing plate (33) are both provided with a plurality of air outlet holes. The upper air blowing plate (32) is located directly above the first conveyor belt (41), and the lower air blowing plate (33) is located in the middle of the inner side of the first conveyor belt (41). The drying mechanism connected to one end of the high-temperature fan (35), medium-temperature fan (36) and low-temperature fan (37) has the same structure, is located in each chamber, and corresponds to the first conveyor belt (41), the second conveyor belt (43) and the third conveyor belt (45) respectively. The temperature and humidity sensor (5) is installed on the upper air blowing plate (32).

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