JPH042389Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to the improvement of a dryer used for industrial purposes such as drying ink on printed circuit boards and baking paint on various products.

[Prior Art] As shown in Figs. 4 to 6, this kind of conventional dryer has two left and right air fans, two heaters, two heaters, two heaters, two heaters, two heaters, two heaters, two heaters, two heaters, two heaters, two heaters, two heaters, two heaters, two heaters, two heaters, two heaters, and the like are arranged at the back of the drying chamber, as shown in Figures 4 to 6. In addition to adopting a dual-circulation blower that creates two air flows on the left and right sides, the exhaust air is sucked up and forcibly discharged in an arrow shape by an exhaust fan installed almost in the center of the top plate of the furnace main body, allowing temperature control during operation. When forced exhaust air is used, the temperature in the upper part of the drying chamber rises and the temperature in the lower part decreases, and the temperature difference can be as high as around 10°C, for example, and the temperature distribution in the drying chamber becomes uneven, causing the material to be dried to dry. Variations occurred depending on the placement position, making it difficult to perform drying and baking with consistent quality.

[Problems to be solved by the invention] In view of the disadvantage of the temperature unevenness in the drying room caused by forced exhaust in conventional dryers, the present invention provides a dual circulation blower type dryer that does not cause temperature unevenness in the drying room even during forced exhaust. That is.

[Means for solving the problem] The double-circulation blower type dryer of the present invention has left and right sirotskov fans and a heater, each having a suction port facing the opening in the middle of both the left and right sides of the back wall plate that partitions the rear of the furnace main body. Left and right ventilation heating chambers, each of which is installed symmetrically, are installed behind the back wall plate, and a group of exhaust holes with adjacent spacing gradually narrowed downward are provided in the vertical front surface, and the upper end touches the top plate of the furnace main body. A penetrating exhaust duct extends upright from above and below the front center of the rear wall plate, and an exhaust fan device communicating with the upper end of the exhaust duct is placed on the top plate of the furnace main body, and on the other hand, the exhaust fan device communicates with the upper end of the exhaust duct. A drying chamber is provided on the inside by left and right side panels with appropriate ventilation holes formed through them, and left and right back panels on both sides with the front surface of the exhaust duct sandwiched between them, and the left and right air blowers are provided on both outsides of the left and right side panels. Left and right hot air channels communicate with the heating chamber, respectively, and left and right suction compartments are formed behind the left and right rear panels and communicate with the left and right suction ports, respectively, to horizontally circulate the hot air in a symmetrical manner and to perform forced exhaust. It is formed so that it can be freely exhausted without disturbing the horizontal circulation of hot air even if it hits.

[Example] An example of the present invention will be described with reference to FIGS. 1 to 3.

The proposed dual circulation air blower dryer A has a pair of left and right fan motors 2 and 3 installed in a motor chamber 1 that protrudes from the center of the rear outside, and a pair of left and right front doors 4 that can be opened in both directions at the front. , 5 are installed behind the back wall plate 7 that partitions the interior of the machine furnace main body 6. Left and right air heating chambers 9, 10 are provided with a center dividing wall plate 8.
Exhaust ducts 13 are installed in one row in the vertical direction on the front surface, with 11 groups of exhaust holes gradually narrowing downwardly with adjacent spacing l, and the exhaust ducts 13 whose upper ends penetrate through the top plate 12 of the furnace main body 6 are arranged in the center of the front of the back wall plate 7. Exhaust fan device 1 extends upright over the top and bottom of the furnace body 6, communicates with the upper end of the exhaust duct 13 almost at the center of the top plate 12 of the furnace body 6, and has a built-in exhaust fan 15 driven by a fan motor 14.
6 is mounted, and on the left and right rear panels 18 and 19 on both sides with the front surface of the exhaust duct 13 sandwiched therethrough, through which 17 groups of ventilation holes are inserted, and on the left and right side panels 21 and 22 through which 20 groups of ventilation holes are installed, as appropriate. A drying chamber 23 is provided on the inside, and left and right hot air passages 24 and 25 are provided on the outside of the left and right side panels 18 and 19 and communicate with the left and right heating and ventilation chambers 9 and 10, respectively, and left and right suction compartments are provided behind the left and right rear panels 18 and 19. 26 and 27, respectively, and furthermore, the left and right sirotsukofan 3 has suction ports 30 and 31 facing central openings 28 and 29 at the middle portions of the left and right sides of the back wall plate 7, respectively.
2, 33 are arranged, and left and right heaters 3 are installed in the left and right ventilation heating chambers 9, 10, respectively, facing the exhaust ports 34, 35 of the left and right Sirotskov fans 32, 33.
6,37 are arranged.

In the figure, 38 is a power light, 39 is an operating light, 40 is a temperature controller, 41 is a main timer, 42 is a timer switch, 43 is a buzzer, 44 is a buzzer switch, 45 is an operating switch, 46 is an exhaust fan timer, and 47 is a An exhaust fan switch, 48 is a thermocouple, and 49 is an intake port.

[Function] Since the dual circulation blow dryer A of the present invention is constructed as described above, first turn on the power (not shown), turn on the power light 38, set the initial temperature with the temperature controller 40, and turn on the timer switch 42. When the main timer 41 is activated by pressing the operation switch 45 and the operation light 39 is turned on to start operation, the pair of left and right fan motors 2, 3 and heaters 36, 37 operate, and air is sent out from the left and right sirotsukofans 32, 33. are heated by the left and right heaters 36 and 37, respectively, and then passed through the left and right hot air channels 24 and 25 to the drying chamber 23 through 20 groups of ventilation holes in the left and right side panels 21 and 22.
flows horizontally into the interior.

The hot air flowing in from the left and right passes through the left and right suction chambers 26, 27 through the left and right suction compartments 26, 27, and then the left and right suction ports 30,
A series of circulating flows from 31 to the left and right Sirotsukofhans 32 and 33 circulate in a bilaterally symmetrical manner, and the inside of the drying chamber 23 continues to rise uniformly to the initial set temperature.

Here, the drying chamber 23 and the air heating chambers 9, 10 are not directly communicated with each other, but are indirectly communicated through the suction compartments 26, 27, through the back plates 18, 19, for circulation by the left and right pairs of Sirotskov fans 32, 33. A buffer room that softens the suction flow and a uniform drying room 23
Airflow is sucked in horizontally and is not concentrated in the center.
The temperature inside the drying chamber 23 is made uniform by not disturbing the air flow inside the drying chamber 23.

However, when the temperature inside the drying chamber 23 exceeds the initial set temperature during operation, the temperature sensor 48a of the thermocouple 48 is activated, and the left and right dryer fans 32, 33
Then, the left and right heaters 36, 37 are stopped and the buzzer 43 is sounded, so the exhaust fan switch 4 is turned off.
After pressing 7, the buzzer switch 44 is pressed to stop the alarm, and the exhaust fan timer 46 is operated for a predetermined set time to drive the exhaust fan motor 14 and rotate the exhaust fan 15.

Then, as shown by the arrows in FIGS. 1 to 3, the hot air rises inside the exhaust duct 13 from the nearest group of exhaust holes 11, reaches the exhaust fan 15, and is discharged outside from the exhaust port 50, so that the interior of the drying chamber 23 is When the temperature starts to drop and falls below the initial set temperature, the temperature sensor 48a of the thermocouple 48 stops and restarts the left and right Shirotsukou fans 32, 33 and the left and right heaters 36, 37. , 33 are sent to the left and right heaters 36, 37, respectively.
After being heated, it flows horizontally into the drying chamber 23 through the left and right hot air channels 24 and 25 through the groups of ventilation holes 20 in the left and right side panels 21 and 22.

This operation is repeated within a predetermined time set by the main timer 41, and the shelves 5 in the drying chamber 23 are
Objects to be dried (not shown) placed and arranged on 1 are dried or baked.

[Effect] Thus, unlike the conventional dryer (i) in which the exhaust air is concentrated from the suction port (N) opened at one location in the center of the ceiling of the furnace body (6), the present invention is designed to draw and exhaust the exhaust air from a large number of exhaust holes (11 groups). Since the suction passes through the suction and exhaust ducts 13 in sequence, the flow of hot air in the drying chamber 23 is not disturbed vertically as in the conventional case, but is carried out quietly in a horizontal state. Since there is a tendency for a larger amount of gas to be sucked in from the upper exhaust hole 11, the interval l between adjacent exhaust holes 11 at the upper part is made sparse, and the interval l between adjacent exhaust holes 11 at the lower part is gradually narrowed to a denser one so that the exhaust duct 13 is made uniform over the entire length of the exhaust duct 13. It is excellent in that it secures the suction amount, suppresses the temperature difference between the upper and lower parts as much as possible, eliminates temperature unevenness in the drying chamber even during forced exhaust, and ensures consistent quality drying and baking work. Demonstrate practicality and usefulness.

[Brief explanation of the drawing]

1 to 3 are a front view, a partially omitted right side view, and a partially sectional plan view showing an embodiment of the present invention, and FIGS. 4 to 6 are a front view and a partially sectional view of a conventional dryer. FIG. 6 is an omitted right side view and a plan view. A...Double circulation blower dryer, l...Adjacent spacing,
6... Furnace body, 7... Back wall plate, 8... Center dividing wall plate, 9, 10... Air blow heating chamber, 11... Exhaust hole, 12... Top plate, 13... Exhaust duct, 15 …
...exhaust fan, 16...exhaust fan device, 17,
20... Ventilation hole, 18, 19... Back plate, 21,
22...Side plate, 23...Drying room, 24, 25...
... Hot air channel, 26, 27 ... Suction compartment, 28, 2
9... Opening, 30, 31... Suction port, 32, 33
...Shirotskov fan, 34,35,50...exhaust port, 36,37...heater.

Claims (1)

[Scope of utility model registration request] Left and right ventilation heating chambers with left and right Sirotskov fans and heaters respectively installed are installed behind the back wall board, with suction ports facing the openings in the middle of both the left and right sides of the back wall board that partitions the rear of the furnace main body, and the vertical front A group of exhaust holes is provided through the exhaust hole group by gradually narrowing the distance between adjacent holes downwardly, and an exhaust duct whose upper end penetrates the top plate of the furnace main body extends upright from above and below the center of the front surface of the back wall plate. An exhaust fan device communicating with the upper end of the exhaust duct is mounted on the top plate of the furnace main body, and the inside of the furnace main body is provided with left and right side plates and left and right back plates, each having a group of ventilation holes therethrough. a drying chamber, left and right hot air passages communicating with the left and right air blowing and heating chambers on the outside of each of the left and right side plates, and left and right suction compartments communicating with the left and right suction ports behind the left and right back plates, respectively. A dual circulation blow dryer with compartments.