JPS62255961A - Electrophotographic printer - Google Patents

Abstract

PURPOSE:To prevent the temperature of a device from rising because of discharged air by connecting the inflow port of an exhaust duct to a ring blower and opening an outside air taking-in slit in a part of the duct. CONSTITUTION:An exhaust duct 1 whose sectional area of a flow passage is increased toward an exhaust port 1a is attached under a machine frame 4, and a ring blower 3 is connected to the flowin port 1b of the duct 1 through a hose 2. The outside air taking-in slit is provided on the lower face of the duct 1. Since the external air at a low temperature is mixed with air at a high temperature which passes the ring blower 3 for exhaust and toner gathering to cool the air and it is discharged, the rise of the temperature of the device due to discharged air is prevented to stabilize the quality of output data.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to the structure of an electrophotographic printer used for information processing and output.

[Conventional technology]

Conventionally, in an electrophotographic printer, as shown in FIG.
Exhaust air from the ring blower 3 used for exhausting the electrophotographic process section 5 and collecting waste toner is led from the exhaust port of the ring blower 3 by a hose 2 to the slit in the outer layer or under the floor of the machine frame 4. It was discharged as is.

[Problem that the invention seeks to solve]

The above-mentioned conventional electrophotographic printer has a built-in drum heater to stabilize the characteristics of the photosensitive drum, and its temperature is usually set around 10°C higher than the environmental temperature, so the temperature of the exhaust air is lower than room temperature. It's getting expensive. Further, due to the characteristics of the ring blower, the temperature of the exhaust gas that has passed through the blower rises further by about 10 to 20 degrees Celsius. If this exhaust air is directly exhausted under the floor of the machine frame or near the exterior door, the exhaust air will raise the temperature of the equipment, lowering the quality of output data, and increasing the temperature of parts near the exhaust port, making it difficult for operators etc. to come into contact with them. It made me feel uncomfortable at times.

SUMMARY OF THE INVENTION An object of the present invention is to provide an electrophotographic printer that allows exhaust air from a ring blower to be exhausted at a safe temperature.

[Means for solving problems]

The present invention is an electrophotographic printer equipped with a ring blower for exhausting an electrophotographic processing unit that performs electrostatic copying using toner and collecting waste toner, and in which the cross-sectional area of the flow path is increased toward the exhaust port. Attach the exhaust duct to the machine frame,
The electrophotographic printer is characterized in that an inlet of the exhaust duct is connected to the ring blower, and a slit for taking in outside air is opened in a part of the duct.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

In Figures 1 to 3, a triangular exhaust duct 1 with a larger cross-sectional area toward the exhaust port 1a is attached to the lower part of the machine frame 4, and a hose 2 is connected to the inlet 1b of the exhaust duct 1. A ring blower 3 is connected through the ring blower. A part of the lower surface of the exhaust duct 1 is provided with a slit 1c for taking in outside air. The ring blower 3 is used to exhaust air from an electrophotographic process section that performs electrostatic copying using toner and to collect waste toner.

In the embodiment, the hot air passing through the ring blower 3 and being discharged is guided by a hose 2 to an exhaust duct 1 having a triangular shape. Inside this exhaust duct 1, the duct has a triangular shape, so as the air advances, the duct cross-sectional area increases and the air flow velocity and wind pressure decrease, and as a result, outside air is taken in through the slit 1c, and the exhaust air The temperature drops and is discharged to the back side of the device.

Therefore, the inside of the device will not be heated and will not be adversely affected.

〔Effect of the invention〕

As explained above, the present invention mixes low-temperature external air into the high-temperature air that has passed through the exhaust and toner collection ring blower, cools it, and then exhausts it, thereby preventing the device temperature from rising due to the exhaust air. This has the effect that it is possible to stabilize the quality of output data, and it does not cause discomfort to the operator or the like.

[Brief explanation of drawings]

Fig. 1 is a longitudinal cross-sectional view showing an embodiment of the present invention, Fig. 2 is a view from B in Fig. 1, Fig. 3 is a view from A in Fig. 1, and Fig. 4 is a longitudinal cross-sectional view showing a conventional example. It is a diagram. 1...Exhaust duct 1c...Slit 2.
... Hose 3 ... Ring blower patent applicant [1 Hon Denki Co., Ltd. agent Patent attorney 1'F Nonaka Fig. 1 Fig. 2

Claims (1)

[Claims] (1) In an electrophotographic printer equipped with a ring blower for exhausting the electrophotographic processing section that performs electrostatic copying using toner and collecting waste toner, the cross-sectional area of the flow path toward the exhaust port is increased. An electrophotographic printer characterized in that an exhaust duct is attached to a machine frame, an inlet of the exhaust duct is connected to the ring blower, and a slit for taking in outside air is opened in a part of the duct.