JPH0436800Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a dryer equipped with a heat exchanger formed by housing a double-winged fan in a casing.

[Technical background of the invention] This type of dryer uses the rotation of a double-winged fan in a heat exchanger to suck exhaust air from inside the drum, which is a drying chamber inside the outer box, with one wing and direct it to the other wing. There is a device in which air is sucked in from outside the machine and passed through the unit, thereby exchanging heat between the exhaust air and the outside air, and dehumidifying the hot and humid exhaust air.

On the other hand, when installing an electronic unit for operation control in a dryer with such a configuration, an opening is provided inside the outer box on the outside air circulation side of the heat exchanger, and the electronic unit is installed near the opening. It is conceivable that the electronic unit is cooled by a portion of the outside air leaking into the outer box from the opening.

[Problems with the Background Art] However, in the above-mentioned method, cooling of the electronic unit by outside air becomes uncertain, and heat dissipation fins such as switching elements (triacs) and power transistors, which require heat dissipation among the electronic components in the electronic unit, are uncertain. It is predicted that a problem will occur that will require a larger value. Also, it is preferable to install the electronic unit near the operation panel in consideration of wiring, etc. However, if you try to install the electronic unit near the operation panel in this way, the electronic unit will be separated from the heat exchanger. However, there is a problem in that the cooling of the electronic unit becomes even more insufficient.

[Purpose of the invention] The present invention was made in view of the above circumstances, and its purpose is to provide a system that allows the electronic unit to be reliably and sufficiently cooled even though the electronic unit is installed near the operation panel. It is an object of the present invention to provide a dryer in which heat dissipation fins such as switching elements (triacs) and power transistors can be made small.

[Summary of the invention] In order to achieve the above object, the present invention has an operation panel provided in the front part of the outer box, a drying chamber provided in the outer box, and a drying chamber provided in the rear part of the outer box. It is formed by housing a double-winged fan with winglets on both sides in a casing, and as the double-winged fan rotates, one winglet blows the exhaust air from the drying chamber, and the other winglet blows exhaust air from the outside of the aircraft. a heat exchanger that dehumidifies the exhaust air by sucking and blowing outside air; an electronic unit for operation control provided in the front part of the outer box and near the operation panel;
The hose has one end connected to the outside air discharge side of the heat exchanger and guides a part of the outside air discharged from the heat exchanger to the electronic unit, and the hose is connected to the outside air discharge side of the heat exchanger. The feature is that the outside air is guided to the electronic unit via a hose, and the electronic unit is cooled by the outside air.

[Embodiment of the invention] An embodiment of the invention will be described below with reference to the drawings. First, in Figure 1, 1 is the outer box,
It has a drying material entrance/exit 2 approximately in the center of the front part, and a door 3 for opening and closing the entrance/exit 2 is pivotally installed in front of the entrance/exit 2. Reference numeral 4 denotes a drum with a drying chamber 5 inside, and its front opening 6 is rotatably supported by a drum support 7 around the drying material inlet/outlet 2, and is provided protruding rearward at the center of the rear surface. The bearing 1 is attached to the support plate 9 fixed to the back of the outer box 1.
0, and is rotatably disposed within the outer box 1. 11 is outer box 1
This heat exchanger is located inside the drum 4 and is disposed behind the drum 4, and is made up of a double-wing fan 12 housed in a casing 13, which has a front wing 12a at the front and a rear wing 12b at the rear. The double wing fan 12 is rotatably supported on the support shaft 8 of the drum 4 via a pulley 14.
2, the inside of the casing 13 is connected to the front exhaust circulation chamber 1.
3a and a rear outside air circulation chamber 13b. Reference numeral 15 indicates a vent hole formed at the center of the front surface of the casing 13, and reference numeral 16 indicates an exhaust port formed at the center of the rear surface of the drum 4 in correspondence with the vent hole 15. , exhaust port 1
6, the drum 4 is communicated with the inside of the drying chamber 5. Further, the exhaust gas circulation chamber 13a is connected to the front part of the drying chamber 5 through a duct (not shown) on its outer circumferential side, for example, and a heater is disposed within the duct. Reference numeral 17 denotes a hose connection port formed at the lower part of the outer periphery of the casing 13, which communicates with the outside air discharge side of the outer periphery of the outside air circulation chamber 13b. Reference numeral 18 denotes a back plate attached so as to close the back surface of the outer box 1, and has an outside air intake hole 19 formed in the central periphery and an outside air discharge hole 20 formed in the lower part of the periphery. On the other hand, in FIG. 2, 21 is a motor disposed at the upper corner of the outer box 1, and its rotating shaft 21a
Drum pulley and fan pulley 22 (second
In the figure, only the fan pulley is shown), and the drum belt 23 is stretched between the drum pulley and the outer circumference of the drum 4, and the fan pulley 22
A fan belt 24 is stretched between the pulley 14 of the fan 12 and the fan 12. Reference numeral 25 designates an electronic unit for operation control, which consists of electronic components such as a switching element (TRIAT) and a power transistor (not shown) arranged inside a case 26, and is located at the front lower part of the outer box 1. It is located in a corner and is disposed integrally with the operation panel 27 (see FIG. 3). In this case, the case 26 can be divided into front and rear parts, and the weak electrical parts of the electronic components are stored in the case 26.
6, and a strong electric section is arranged at the rear of the case 26. Reference numeral 28 denotes a plurality of lead wires led out from the electronic unit 25. A hose connection port 29 (see FIG. 1) is protruded from the rear surface of the case 26, and a ventilation hole 30 (see FIG. 2) is formed. A hose 31 has one end connected to the hose connection port 17 of the heat exchanger 11 and the other end connected to the hose connection port 29 of the electronic unit 25. In addition, in Figure 1, 3
2 is a filter located within the drum 4 and provided to cover the exhaust port 16.

Next, the operation of the above configuration will be explained. During drying operation, the drum belt 23 is driven by the motor 21.
The drum 4 is rotated via the fan belt 24, and the double-wing fan 12 is rotated via the fan belt 24. As the double-wing fan 12 rotates, the air in the drying chamber 5 is pumped through the exhaust port 16 and the vent 15 into the exhaust circulation chamber by the centrifugal blowing action of the front wing piece 12a.
The air is sucked into the drying chamber 5 through a duct (not shown), is hot-aired by a heater in this duct, and is returned to the drying chamber 5.
Due to the centrifugal blowing action of b, outside air is sucked into the outside air circulation chamber 13b from outside the machine through the outside air suction hole 19,
Then, the outside air is discharged to the outside of the machine from the outside air exhaust hole 20. At this time, the air in the drying chamber 5, which has been hot-aired by the heater, removes the moisture from the material to be dried, and then is sucked into the exhaust gas distribution chamber 13a as exhaust air, and in the process of flowing through the exhaust gas distribution chamber 13a. The heat exchanges heat with the outside air in the outside air circulation chamber 13b by heat conduction through the double-wing fan 12, cools and dehumidifies the air, and then heats the air again and supplies the air into the drying chamber 5, thus circulating.

By the way, a part of the outside air sucked into the outside air circulation chamber 13b is discharged from the outside air circulation chamber 13b to the hose 31 side via the hose connection port 17, and the outside air is passed through the hose 31 to the hose connection port of the electronic unit 25. 29 into the case 26, and is discharged into the outer box 1 from the ventilation hole 30 through the case 26. At this time, the electronic components inside the case 26 are cooled by the outside air.

According to this embodiment, the electronic unit 25
Although it is provided integrally with the operation panel 27, the outside air circulation chamber 1 of the heat exchanger 11 equipped with the double-wing fans 12
A hose 31 is connected between the outside air discharge side at 3b and the electronic unit 25, and a part of the outside air flowing through the outside air circulation chamber 13b for cooling and dehumidification is guided into the electronic unit 25 through the hose 31. Since the external air is allowed to pass through, the electronic components inside the electronic unit 25 can be actively and reliably and sufficiently cooled, and therefore, the electronic components that require heat dissipation, such as switching elements (triacs) and power transistors, can be cooled down. The heat dissipation fins can be made smaller. Moreover, in this case, since the electronic unit 25 is cooled by utilizing the air blowing action of the double-winged fan 12 in the heat exchanger 11, there is no need to separately provide a dedicated fan for cooling the electronic unit 25. In particular, according to this embodiment, since the electronic unit 25 is located at the front of the outer box 1 and integrated with the operation panel 27, a lead wire connecting the electronic unit 25 and the operation panel 27 can be eliminated. There are advantages.

[Effects of the invention] As is clear from the above description, the present invention uses outside air for dehumidification on the outside air discharge side of the heat exchanger equipped with double-winged fans, even though the electronic unit is installed near the operation panel. Since the configuration is such that a hose leading part of it to the electronic unit is connected, the electronic unit can be actively and reliably and sufficiently cooled by the outside air without the need for a dedicated fan, and the switching element (triacting element) of the electronic component can be ), power transistors, etc., have the excellent effect of making heat dissipation fins smaller.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; FIG. 1 is a longitudinal sectional side view of the entire device, FIG. 2 is a rear view of the entire device with the back plate removed, and FIG. 3 is a perspective view of the electronic unit. In the drawing, 1 is an outer box, 5 is a drying chamber, 11 is a heat exchanger, 12 is a double wing fan, 12a is a front wing piece (one side wing piece), 12b is a rear wing piece (the other side wing piece), 13
13b is a casing, 13b is an outside air circulation chamber, 25 is an electronic unit, 27 is an operation panel, and 31 is a hose.

Claims (1)

[Scope of utility model registration request] An operation panel provided in the front part of the outer box, a drying chamber provided in the outer box, and a double-winged fan provided in the rear part of the outer box and having wing pieces on both sides are housed in the casing. Heat is generated and dehumidified from the exhaust air by blowing the exhaust air from the drying chamber with one blade and sucking and blowing outside air from outside the aircraft with the other blade by rotating the double-wing fan. an exchanger, an electronic unit for operation control provided in the front part of the outer box and near the operation panel; A dryer comprising a hose that guides a portion of outside air to an electronic unit.