JP2021092679A - Projector and installation method of power cable in projector - Google Patents

Abstract

To provide a projector and an installation method of a power cable in the projector capable of preventing an occurrence of electromagnetic interference (EMI) beforehand by connecting an external power inlet and a power supply unit via an AC cable without generating extra length of the AC cable for supplying the power from an inlet of the external power to be a commercial power supply, to the power supply unit.SOLUTION: A power supply device 13 is divided into a first power supply unit 13A detachably disposed at an inside part of a projector housing 11, and a second power supply unit 13B detachably disposed at an outside part of the projector housing 11. Further, a power cable 14 is connected to a cable insertion port 17 of the first power supply unit 13A and connected via an installation area E1 of the second power supply unit 13B and a side-part wiring area E2 of a cooling fan unit 12, to an external power supply inlet 16.SELECTED DRAWING: Figure 1

Description

The present invention relates to a projector capable of improving electromagnetic interference (EMI) of a power supply unit, and a method of installing a power cable in the projector.

For example, Patent Document 1 is known as a technique relating to a projector that projects an image on a screen.
The projector shown in Patent Document 1 includes a power supply unit with a built-in transformer that converts commercial power to a rated current / voltage, as well as a light source unit, a driver unit, a control unit, and a cooling fan driven by the power supplied from the power supply unit. It has components such as a unit.
Further, power is supplied from the intake port of the external power supply, which is a commercial power supply, to the power supply unit by a dedicated AC (Alternating Current) cable.

Further, the projector may be provided with a heat sink for circulation cooling that forcibly cools the air sucked by the cooling fan unit.
In such a projector, in order to reduce the size, the heat sink for circulation cooling is cooled by the same cooling fan, and the power supply unit is cooled.

Japanese Unexamined Patent Publication No. 2016-90696

By the way, in a projector of a type in which the heat sink and the power supply unit are simultaneously cooled by the same cooling fan, the air supplied from the cooling fan first hits the heat sink and then reaches the power supply unit.
Here, when the power supply unit is attached to the installation area of the projector main body, the position is defined so that the distance from the heat sink becomes small due to space restrictions.
Therefore, the AC cable that supplies power to the power supply unit needs to be inserted into the insertion port of the power supply unit in advance, and the power supply unit must be attached to the installation area of the projector main body, and has a certain length for the work. It is necessary to provide an extra length of.

However, the AC cable inserted into the power supply unit may come into contact with the transformer of the power supply unit, the heat sink for circulating cooling, etc., because the extra length remains as it is after the power supply unit is attached to the installation area of the projector body. There is.
Further, such an AC cable has a problem that electromagnetic waves are generated and electromagnetic interference (EMI) occurs when it comes into contact with a transformer in a power supply unit, a heat sink for circulating cooling, or the like.

More specifically, in the projector 10 shown in FIG. 5, a state in which the plug 4 of the AC cable 3 connected to the inlet 2 of the external power supply is inserted into the power supply unit 1 is shown.
In the projector 10 of FIG. 5, reference numeral 5 is a cooling fan unit having an intake fan 5A, reference numeral 6 is a heat sink for circulating cooling mounted on the cooling fan unit 5, and reference numeral 7 is a projector housing for accommodating these components. Each part is shown.

After that, in the projector 10, as shown in FIG. 6, when the power supply unit 1 into which the AC cable 3 is inserted is attached to the installation area in the projector housing portion 7, the extra length portion 3A of the AC cable 3 remains as it is. There is a problem that it remains.
As a result, in the projector 10, the extra length portion 3A of the AC cable 3 may come into contact with the transformer of the power supply unit 1 and the heat sink 6 of the cooling fan unit 5, which causes electromagnetic interference (EMI). is there.

The present invention has been made in view of the above circumstances, and draws in an external power source without generating an extra length for an AC cable that supplies power to the power supply unit from an external power source inlet that serves as a commercial power source. Provided is a method of installing a power supply cable in a projector and a projector, which can connect a port and a power supply unit, thereby preventing contact with a transformer of the power supply unit, a cooling fan unit, etc., and occurrence of electromagnetic interference (EMI). To do.

In order to solve the above problems, the present invention proposes the following means.
In the projector shown in the first aspect of the present invention, the projector housing portion in which the light source unit for projecting an image is installed, the cooling fan unit that blows cooling air into the projector housing portion, and the cooling fan unit. It has a power supply device provided adjacent to the power supply device and a power cable for connecting the power supply device and an external power supply inlet, and the power supply device is detachably arranged inside the projector housing portion. It is divided into a first power supply unit and a second power supply unit detachably arranged on the outer side of the projector housing, and the power cable is connected to the external power supply inlet and the first power supply unit. 2. It is characterized in that it is connected to the cable insertion port of the first power supply unit via the installation area of the power supply unit and the side wiring area of the cooling fan unit.

In the method of installing the power cable shown in the second aspect of the present invention, the projector housing portion in which the light source unit for projecting an image is installed, the cooling fan unit for blowing cooling air into the projector housing portion, and the like. In a projector having a power supply device provided adjacent to the cooling fan unit and a power cable for connecting the power supply device and an external power supply inlet, the power supply device is attached to the inner portion of the projector housing portion. It was divided into a first power supply unit detachably arranged in the above and a second power supply unit detachably arranged in the outer portion of the projector housing portion, and the power cable was connected to the entrance of the external power supply. Above, it is characterized in that it is connected to the cable insertion port of the first power supply unit via the second power supply unit installation area from which the second power supply unit is removed and the side wiring area of the cooling fan unit.

In the present invention, the power cable connected to the cable insertion port of the power supply unit is prevented from coming into contact with the transformer and the cooling fan unit of the power supply unit, and the occurrence of electromagnetic interference (EMI) can be prevented.

It is a schematic block diagram which shows the projector which concerns on this invention. It is a schematic block diagram which shows the projector which concerns on embodiment of this invention. It is an assembly drawing which shows the projector of FIG. 2 in detail. It is an assembly drawing which follows FIG. It is a figure which shows the problem which concerns on the background technology. It is a figure following FIG.

The projector 100 according to the present invention will be described with reference to FIG.
The projector 100 includes a projector housing portion 11, a cooling fan unit 12, a power supply device 13, and a power cable 14.

The projector housing portion 11 has a light source unit 15 that projects an image inside.
The cooling fan unit 12 is provided to blow cooling air into the projector housing 11.
The power supply device 13 is provided so as to be adjacent to the cooling fan unit 12, and is detachably arranged on the inner side (arrow a1 side) of the projector housing portion 11 of the first power supply unit 13A and the projector housing portion 11. It is divided into a second power supply unit 13B that is detachably arranged on the outer side (arrow a2 side).
The power cable 14 connects the external power supply inlet 16 and the cable insertion port 17 of the first power supply unit 13A to each other, and from the external power supply inlet 16 to the installation area E1 of the second power supply unit 13B. And, it is connected to the cable insertion port 17 of the first power supply unit 13A via the side wiring area E2 of the cooling fan unit 12.

In the projector 100 according to the present invention configured as described above, the power supply device 13 is detachably arranged inside the projector housing portion 11 of the first power supply unit 13A and the projector housing portion 11. It was divided into a second power supply unit 13B which was detachably arranged on the outer side.
As a result, in the projector 100, the installation area E1 of the second power supply unit 13B is used as a work area in a state where the second power supply unit 13B located on the outer side of the projector housing portion 11 is removed, so that the power cable 14 can be easily connected to the cable insertion port 17 of the first power supply unit 13A.
Further, the power cable 14 connected to the cable insertion port 17 of the first power supply unit 13A can be connected to the external power supply inlet 16 via the side wiring area E2 of the cooling fan unit 12.

That is, in the projector 100, the first power supply unit is passed through the power cable 14 without generating an extra length in the power cable 14 that supplies power to the power supply units 13A and 13B from the intake port 16 of the external power supply serving as a commercial power supply. The cable insertion port 17 of 13A and the external power supply inlet 16 can be easily connected with the minimum length.
As a result, in the projector 100, the power cable 14 connected to the cable insertion port 17 of the first power supply unit 13A is prevented from coming into contact with the transformer of the power supply device 13 and / or the heat sink for circulation cooling of the cooling fan unit 12. Will be done.
As a result, the projector 100 can prevent the occurrence of electromagnetic interference (EMI).

(Embodiment)
An embodiment of the present invention will be described with reference to FIGS. 2 to 4.
As shown in FIG. 2, the projector 101 according to the embodiment includes a projector housing portion 21, a cooling fan unit 22, a power supply device 23, and a power cable 24.

The projector housing 21 has a light source unit 25 that projects an image inside.
The light source unit 25 includes a control unit 25A that generates an image and a lens unit 25B that projects an image generated by the control unit 25A.

The cooling fan unit 22 is provided to blow cooling air into the projector housing 21.
Specifically, the cooling fan unit 22 has an intake fan device 30 that takes in cooling air from the outside into the projector housing 21 and blows it, and is adjacent to the intake fan device 30 and blows air from the intake fan device. It has a heat sink 31 that cools the air, and an exhaust fan device 32 that discharges the air inside the projector housing 21 to the outside.
The intake fan device 30 and the heat sink 31 are arranged in the air duct 33, and the heat sink 31 is arranged so as to be adjacent to the power supply device 23.

The heat sink 31 is a forced cooling heat sink that forcibly cools the air taken in by the intake fan device 30 by circulating the refrigerant through the pipe 31A.
Further, a circulation cooling unit 34 including a compressor, an outdoor unit and an expansion valve (not shown) is connected to the heat sink 31 via a pipe 31A.
In the circulation cooling unit 34, the refrigerant evaporated in the heat sink 31 is compressed and cooled to be liquefied, and then supplied to the heat sink 31 again.

The power supply device 23 is provided so as to be adjacent to the heat sink 31 of the cooling fan unit 22, and is detachably arranged at the rear portion (arrow A1 side) which is the inner portion of the projector housing portion 21 and the first power supply unit 23A. It is divided into a second power supply unit 23B that is detachably arranged on the front portion (arrow A2 side) that is the outer portion of the projector housing portion 21.
As a specific configuration, the first power supply unit 23A includes an AC input unit having a transformer 23a (see FIG. 3) that converts an AC voltage supplied from the outside into a DC voltage.
The second power supply unit 23B includes a DC power supply unit (DC: Direct Current) having a transformer (not shown) that converts the DC voltage converted by the first power supply unit 23A into a DC voltage different from the DC voltage.
The first power supply unit 23A and the second power supply unit 23B are arranged adjacent to each other in the projector housing 21.

The power cable 24 connects the external power supply inlet 26 and the cable insertion port 27 of the first power supply unit 23A to each other, and from the external power supply inlet 26, the installation area S1 of the second power supply unit 23B. And, it is connected to the cable insertion port 27 of the first power supply unit 23A via the side wiring area S2 located at the front portion of the cooling fan unit 22.
Here, the front portion is preferably a region in which other electronic components are not adjacent to the cooling fan unit 22. In this example, since there are fewer other electronic components in the front portion of the cooling fan unit 22 than in other portions (rear portion, side portion), the side wiring region S2 is arranged at a position.
Further, the power cable 24 is installed in the installation area S1 of the second power supply unit 23B and the side wiring area S2 of the cooling fan unit 22 via a plurality of clampers 40 installed outside the air duct 33. It is fixed to the cooling fan unit 22.

The operation of the projector 101 according to the embodiment configured as described above will be described with reference to FIGS. 2 to 4.
In the projector 101, the power supply device 23 is attached to the first power supply unit 23A detachably arranged at the rear portion (arrow A1 side) of the projector housing portion 21 and at the front portion (arrow A2 side) of the projector housing portion 21. It was divided into a second power supply unit 23B that was detachably arranged.
As a result, in the projector 101, as shown in FIG. 3 showing a specific configuration, the second power supply unit 23B located on the outer side of the projector housing 21 can be separated from and removed from the first power supply unit 23A. it can.

As a result, in the projector 101, as shown in FIG. 3, the installation area S1 in which the second power supply unit 23B is installed can be used as a work area, and the installation area S1 and the side wiring area of the cooling fan unit 22 can be used. Through S2, the power cable 24 leading to the external power supply inlet 26 can be easily and with the minimum length connected to the cable insertion port 27 of the first power supply unit 23A.

After that, the power cables 24 installed in the installation area S1 of the second power supply unit 23B and the side wiring area S2 of the cooling fan unit 22 are fixed to the outside of the cooling fan unit 22 by a plurality of clampers 40 and thus run out. Is prevented.
After that, in the projector 101, as shown in FIG. 4, the second power supply unit 23B is installed in the installation area S1 and connected to the first power supply unit 23A to complete the assembly of the power supply device 23.

That is, in the projector 101, the power cable 24 that supplies power to the power supply unit 23A from the intake port 26 of the external power supply, which is a commercial power source, does not generate an extra length (see FIG. 1 The cable insertion port 27 of the power supply unit 23A and the external power supply inlet 26 can be connected with the minimum length.
At that time, the power cable 24 comes into contact with the transformer of the power supply device 23 and / or the heat sink 31 of the cooling fan unit 22 by being fixed to the outside of the cooling fan unit 22 by a plurality of clampers 40 to prevent runout. Never.
As a result, in the projector 101, the power cable 24 does not swing, so that the occurrence of electromagnetic interference (EMI) can be prevented.

In the above embodiment, the inner portion of the projector housing portion 21 is installed at the rear portion (arrow A1 side), and the outer portion of the projector housing portion 21 is set at the front portion (arrow A2 side). The direction is appropriately set according to the usage status of the projector 101.

Although the embodiments of the present invention have been described in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and design changes and the like within a range not deviating from the gist of the present invention are also included.

The present invention relates to a projector capable of improving electromagnetic interference (EMI) of a power supply unit, and a method of installing a power cable in the projector.

11 Projector housing 12 Cooling fan unit 13 Power supply 13A 1st power supply unit 13B 2nd power supply unit 14 Power cable 15 Light source unit 16 External power inlet 17 Cable insertion port 21 Projector housing 22 Cooling fan unit 23 Power supply 23A 1st power supply unit 23B 2nd power supply unit 24 Power cable 25 Light source unit 26 External power supply inlet 27 Cable insertion port 30 Intake fan device 31 Heat sink 32 Exhaust fan device 33 Air duct 34 Circulation cooling unit 40 Clamper 100 Projector 101 Projector E1 Installation area of the second power supply unit E2 Side wiring area of the cooling fan unit S1 Installation area of the second power supply unit S2 Side wiring area of the cooling fan unit

Claims (8)

A projector housing unit in which a light source unit for projecting an image is installed, a cooling fan unit that blows cooling air into the projector housing unit, and a power supply device provided adjacent to the cooling fan unit. In a projector having a power cable for connecting the power supply device and an external power supply inlet.
The power supply device is divided into a first power supply unit detachably arranged inside the projector housing portion and a second power supply unit detachably arranged outside the projector housing portion.
The power cable is connected to the entrance of the external power supply and is connected to the cable insertion port of the first power supply unit via the installation area of the second power supply unit and the side wiring area of the cooling fan unit. A projector characterized by being The first power supply unit is detachably arranged at the rear portion in the projector housing portion.
The projector according to claim 1, wherein the second power supply unit is detachably arranged in a front portion of the projector housing portion. The cooling fan unit has an intake fan device that takes in cooling air from the outside and blows it, and a heat sink that is adjacent to the intake fan device and cools the air blown from the intake fan device.
The projector according to any one of claims 1 or 2, wherein the heat sink is arranged so as to be adjacent to the power supply device. The projector according to claim 3, wherein the heat sink is a circulation cooling heat sink in which a pipe for supplying a refrigerant is installed. The cooling fan unit is characterized by further having an exhaust fan device for discharging air that has passed through the power supply device to the outside in the projector housing portion located on the opposite side of the cooling fan unit with the power supply device in between. The projector according to any one of claims 3 or 4. The first power supply unit is an AC input unit that converts an AC voltage supplied from the outside into a DC voltage.
The second power supply unit according to any one of claims 1 to 5, wherein the second power supply unit is a DC power supply unit that converts a DC voltage converted by the first power supply unit into a DC voltage different from the DC voltage. Projector. The projector according to any one of claims 1 to 6, wherein the power cable is fixed by a clamper in a side wiring region of the cooling fan unit. A projector housing unit in which a light source unit for projecting an image is installed, a cooling fan unit that blows cooling air into the projector housing unit, and a power supply device provided adjacent to the cooling fan unit. In a projector having a power cable for connecting the power supply device and an external power supply inlet.
The power supply device is divided into a first power supply unit detachably arranged inside the projector housing portion and a second power supply unit detachably arranged outside the projector housing portion.
After connecting the power cable to the inlet of the external power supply, the first power supply unit passes through the second power supply unit installation area from which the second power supply unit is removed and the side wiring area of the cooling fan unit. A method of installing a power cable in a projector, which is characterized by being connected to the cable insertion port of.

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