Patent Application
20240110722
The present disclosure relates to a louver and a charging device.
Patent Literature 1 discloses an example of a louver that can prevent rainwater or the like from intruding into a cabinet when the cabinet is installed outdoors and can improve ventilation performance without impairing waterproof performance. In the technique described in Patent Literature 1, the louver is configured by two types of an inner louver and an outer louver.
For example, a charging device for charging a battery loaded on a work vehicle is installed outdoors, in a factory, or the like. Therefore, liquid such as water, dust, or the like is likely to enter the inside of the charging device.
An object of an aspect of the present invention is to improve waterproof performance.
According to an aspect of the present invention, a louver comprises: a first member including a lid portion provided with slits disposed at intervals and rising portions extending from peripheral edge portions of the slits toward one side in a depth direction; and a second member including a lid portion provided with slits disposed at intervals and rising portions extending from peripheral edge portions of the slits toward another side in the depth direction, wherein the first member and the second member are disposed to face each other in a direction in which the rising portions extend, and the slits of the first member and the slits of the second member are disposed to be shifted from each other.
According to another aspect of the present invention, a charging device comprises the louver.
According to the present disclosure, waterproof performance can be improved.
An embodiment according to the present invention is explained below with reference to the drawings. However, the present invention is not limited to this. Components of the embodiment explained below can be combined as appropriate. A part of the components is sometimes not used.
[Charging Device]
The charging device 100 takes air from the outside into the inside of a housing 110 and discharges the air that have cooled inside to the outside. The louver 1 is disposed in an external air inlet/outlet port of the charging device 100. In the present embodiment, the charging device 100 includes a suction-side louver 1 disposed on a suction side of the charging device 100 and an exhaust-side louver 1 disposed on an exhaust side.
The housing 110 has a box shape. The housing 110 includes a wall portion 110a facing downward, a wall portion 110b facing the wall portion 110a, a wall portion 110c connecting the wall portion 110a and the wall portion 110b, a wall portion 110d, a wall portion 110e, and a wall portion 110f. The wall portion 110d faces the wall portion 110c. The wall portion 110e connects the wall portion 110c and the wall portion 110d. The wall portion 110f faces the wall portion 110e. In the present embodiment, the wall portion 110a, the wall portion 110b, the wall portion 110c, the wall portion 110d, the wall portion 110e, and the wall portion 110f are formed of a plate-like material. In the housing 110, a suction port A1 is formed on the air suction side and an exhaust port A2 is formed on the exhaust side.
The suction-side louver 1 is provided in the suction port A1. The exhaust-side louver 1 is provided in the exhaust port A2.
The air suction port A1 is provided in the wall portion 110c. The suction port A1 is an opening for introducing gas into an electric component housing chamber 120 and a heat sink housing chamber 130. The suction port A1 is covered by the suction-side louver 1. A not-illustrated suction filter is disposed in the suction port A1. The suction filter prevents dust or the like from entering the inside of the housing 110 from the suction port A1.
The air exhaust port A2 is provided in the wall portion 110d. The exhaust port A2 is an opening for discharging gas from the electric component housing chamber 120 and the heat sink housing chamber 130. The exhaust port A2 is covered by the exhaust-side louver 1. A not-illustrated exhaust filter is disposed in the exhaust port A2. The exhaust filter prevents dust or the like from entering the inside of the housing 110 from the exhaust port A2.
The suction port A1 and the exhaust port A2 are disposed in positions facing each other. Consequently, the gas introduced into a heat sink 131 from the suction port A1 is efficiently discharged from the exhaust port A2.
A suction fan 112 is provided in the suction port A1. The suction fan 112 introduces gas into the electric component housing chamber 120. The suction fan 112 sucks gas from the electric component housing chamber 120 to thereby introduce the gas into the electric component housing chamber 120 from the suction port A1 and discharges the gas from the exhaust port A2.
An exhaust fan 113 is provided in the exhaust port A2. The exhaust fan 113 introduces gas into the heat sink housing chamber 130. The exhaust fan 113 sucks gas from the heat sink housing chamber 130 to thereby introduce the gas into the heat sink housing chamber 130 from the suction port A1 and discharges the gas from the exhaust port A2.
A bracket 111 is disposed on the inside of the housing 110. A space above the bracket 111 is the electric component housing chamber 120 and a space below the bracket is the heat sink housing chamber 130. A not-illustrated electric component is disposed in the electric component housing chamber 120. The heat sink 131, which is a heat dissipation member, is disposed in the heat sink housing chamber 130. The suction fan 112 is disposed upstream of the electric component housing chamber 120. A suction-side louver 1 is disposed on the outer side of the housing 110 to face the suction fan 112. A part of the electric component is disposed on the heat sink 131. A duct 132 is connected to a downstream side of the heat sink 131. The exhaust fan 113 is disposed on the downstream side of the duct 132. The exhaust-side louver 1 is disposed on the outer side of the housing 110 to face the exhaust fan 113.
[Louver]
As illustrated in
In the following explanation, in a state in which the louver 1 is assembled to the charging device 100, a side exposed to the outside is the front and a side facing the housing 110 of the charging device 100, which is an attached portion, is the rear. The front-rear direction is the depth direction of the louver 1. In the present embodiment, left and right means left and right with respect to the front. The left-right direction is the lateral direction of the louver 1. The upward direction is a side orthogonal to the front-rear direction and the left-right direction and directed upward. The downward direction is a side orthogonal to the front-rear direction and the left-right direction and directed downward. The up-down direction is the longitudinal direction of the louver 1. A front-rear axis is an X axis, an up-down axis is a Y axis, and a left-right axis is a Z axis.
The first member 2 includes the lid portion 22 provided with slits 24 disposed at intervals and pairs of rising portions 25 and 26 extending from the peripheral edge portions of the slits 24 toward one side in the depth direction.
The slits 24 are formed in the lid portion 22. In the present embodiment, the slits 24 extend in the longitudinal direction. A plurality of slits 24 are disposed side by side in the lateral direction of the lid portion 22. In the present embodiment, six slits 24 are disposed. As illustrated in
The rising portions 25 and the rising portions 26 are disposed to face each other across the slits 24. The rising portions 25 and the rising portions 26 are similarly configured. The rising portions 25 and the rising portions 26 are formed of a rectangular plate material. The rising portions 25 and the rising portions 26 are erected perpendicularly to the lid portion 22 in the depth direction. As illustrated in
As illustrated in
In a state in which the second member 3 is assembled to the first member 2, the sealing member is pressed against the housing 110 of the charging device 100 to seal the peripheral edge portion of the second member 3. The sealing member has a size and a shape for closing a gap S (see
As illustrated in
As illustrated in
As illustrated in
The slits 34 are formed in the lid portion 32. In the present embodiment, the slits 34 extend in the longitudinal direction. The plurality of slits 34 are disposed side by side in the lateral direction of the lid portion 32. In the present embodiment, five slits 34 are disposed.
As illustrated in
As illustrated in
The rising portions 35 and the rising portions 36 are disposed to face each other across the slits 34. The rising portions 35 and the rising portions 36 are similarly configured. The rising portions 35 and the rising portions 36 are formed of a rectangular plate material. The rising portions 35 and the rising portions 36 are erected perpendicularly to the lid portion 32 in the depth direction. As illustrated in
The first member 2 and the second member 3 are disposed to face each other in a direction in which the rising portions 25 and the rising portions 26 of the first member 2 and the rising portions 35 and the rising portions 36 of the second member 3 extend. In the present embodiment, the rising portions 25 and the rising portions 26 of the first member 2 and the rising portions 35 and the rising portions 36 of the second member 3 partially overlap in the depth direction.
As illustrated in
As illustrated in
The members of the louver 1 configured as explained above are formed by resin molding.
[Action]
A flow of air is explained. The suction fan 112 and the exhaust fan 113 operate, air is taken into the inside from the outside of the housing 110 from the suction-side louver 1, and the air that has cooled the inside is exhausted to the outside from the exhaust-side louver 1. More specifically, the air is taken into the inside of the suction-side louver 1 from the slits 24 of the suction-side louver 1 of the charging device 100. The air flowing in from the slits 24 passes through a flow path formed between the first member 2 and the second member 3 and flows into the inside from the slits 34 passing through the suction port A1 of the housing 110. The flowing-in air flows into the electric component housing chamber 120 and the heat sink housing chamber 130. When the air passes through the electric component housing chamber 120 and the heat sink housing chamber 130, the disposed components are cooled. Then, the air that has cooled the inside of the housing 110 passes through the exhaust port A2 and is taken into the inside of the exhaust-side louver 1 from the slits 34 of the exhaust-side louver 1. The air flowing in from the slits 34 passes through the flow path formed between the first member 2 and the second member 3 and is discharged to the outside from the slits 24.
Next, waterproof performance is explained. In the louver 1, the lid portion 32 of the second member 3 is present behind the slits 24 and the lid portion 22 of the first member 2 is present in front of the slits 34. Therefore, for example, liquid such as water is restricted from directly flowing into the inside of the housing 110 from the louver 1.
A case in which liquid such as water adheres to the louver 1 is explained. In the following explanation, water is explained as an example of the liquid. The water obliquely blowing into the louver 1 is restricted from intruding into the inside by the rising portions 35 and the rising portions 36 of the second member 3. The water adhering to the lid portion 22 of the first member 2 directly flows downward along the lid portion 22 and does not intrude into the inside of the louver 1. The water adhering to the rising portions 25 and the rising portions 26 of the first member 2 or the lid portion 32 of the second member 3 flows downward along the members. Then, the water reaches the wall portion 21a and the wall portion 31a in the lower portions of the slits 24. The peripheral edge portion of the louver 1 and the peripheral edge portion of the housing 110 of the charging device 100 are sealed by the sealing member housed in the stepped portion 27. In the wall portion 21a and the wall portion 31a, inclination from the rear to the front, in other words, from the inner side to the outer side is formed as a draft at the time of molding. Consequently, the water flows along the wall portion 21a and the wall portion 31a and is discharged to the outside.
Next, noise of the charging device 100 including the louver 1 is explained with reference to
The sounds spreading from the slits 24, in other words, the noise during the operation of the charging device 100 changes with the distance between the user and the slits 24, the wavelength, that is, the frequency of the sounds, a slit pitch (an interval between the centers of the slits), which is the interval between the adjacent slits 24, and the like as interference conditions. The sounds spreading from the slits 24 interfere with one another and intensify one another or weaken one another. Depending on the position of the user, the sounds spreading from the slits 24 can be heard more loudly in a certain place due to mutual intensification of the sounds and can be heard less loudly in a certain place due to mutual weakening of the sounds.
For example, the slit width d11 is set to 17.5 [mm], the slit pitch is set to 64 [mm], the sound frequency is set to 100 [Hz], and the distance L from the slits 24 is set to 3 [m]. In this case, assuming that the wavelength of the sounds is represented as λ, the distance in the lateral direction of the charging device 100 is represented as dx, the distance in the direction away from the slits 24 is represented as L, and m is set to a natural number, the sounds are intensified one another in a position where the following Formula 1 holds and the sounds are weakened one another in a position where Formula 2 holds.
dx/L=λ/2×2m (1)
dx/L=λ/2×(2m+1) (2)
[Effects]
As explained above, in the present embodiment, the slits 24 of the first member 2 and the slits 34 of the second member 3 are disposed to be shifted from each other in the lateral direction. In the present embodiment, the lid portion 32 of the second member 3 is present behind the slits 24 and the lid portion 22 of the first member 2 is present in front of the slits 34. According to the present embodiment, it is possible to restrict the inside of the housing 110 from being seen. According to the present embodiment, it is possible to restrict water from intruding into the inside of the housing 110 from the louver 1.
In the present embodiment, the slits 24 of the first member 2 and the slits 34 of the second member 3 extend in the longitudinal direction. In the present embodiment, since the water adhering to the lid portion 22 of the first member 2 directly flows downward along the lid portion 22, it is possible to restrict the water from intruding into the inside of the louver 1. In the present embodiment, it is possible to restrict the water adhering to the lid portion 22 of the first member 2 from intruding into the inside of the louver 1.
In the present embodiment, the rising portions 25 and the rising portions 26 of the first member 2 and the rising portions 35 and the rising portions 36 of the second member 3 partially overlap in the depth direction. In the present embodiment, the water obliquely blowing into the slits 24 can be restricted from intruding into the inside by the rising portions 35 and the rising portions 36 of the second member 3. In the present embodiment, it is possible to secure a flow path of air sucked into the inside of the housing 110 and a flow path of air discharged to the outside of the housing 110. Further, in the present embodiment, it is possible to reduce the thickness of the louver 1 in the depth direction.
In the present embodiment, the first member 2 includes the stepped portion 27 with which the sealing member for sealing the space between the first member 2 and the housing 110 of the charging device 100 is engaged. According to the present embodiment, the peripheral edge portion of the louver 1 and the peripheral edge portion of the housing 110 of the charging device 100 can be sealed by the sealing member.
In the present embodiment, the gap S is formed between the lower end portion of the second member 3 and the first member 2. According to the present embodiment, the water adhering to the rising portions 25 and the rising portions 26 of the first member 2 or the lid portion 32 of the second member 3 can be discharged to the outside along the wall portion 21a and the wall portion 31a by the draft of the wall portion 21a and the wall portion 31a and the sealing member.
As explained above, according to the present embodiment, it is possible to reliably restrict the water from entering the housing 110 from the louver 1. The present embodiment can improve waterproof performance.
In the present embodiment, during the operation of the charging device 100, noises leaking from the slits 24 of the louver 1 are intensified one another and heard more loudly in a certain place and are weakened one another and heard more less loudly in a certain place depending on the position of the user. In the present embodiment, for example, hearing of sound can be improved by adjusting the angle of the charging device 100.
Although the present embodiment is explained above, the present embodiment is not limited by the content explained above. The constituent elements explained above include constituent elements that can be easily assumed by those skilled in the art and constituent elements that are substantially the same, that is, constituent elements in a so-called equivalent range. Further, the constituent elements explained above can be combined as appropriate. Further, various omissions, substitutions, or changes of the constituent elements can be made without departing from the gist of the present embodiment.
The rising portions 25 and the rising portions 26 of the first member 2 and the rising portions 35 and the rising portions 36 of the second member 3 overlap in the depth direction in the present embodiment but may not overlap. The rear end portions of the rising portions 25 and the rising portions 26 and the front end portions of the rising portions 35 and the rising portions 36 may be present in the same positions in the depth direction.
It is explained in the above explanation that the rising portions 25 and the rising portions 26 of the first member 2 and the rising portions 35 and the rising portions 36 of the second member 3 rise perpendicularly to the lid portion 22 or the lid portion 32 but are not limited to this. The rising portions 25 and the rising portions 26 and the rising portions 35 and the rising portions 36 may be inclined with respect to the lid portion 22 or the lid portion 32 rather than being perpendicular thereto. The rising portions 25 and the rising portions 26 and the rising portions 35 and the rising portions 36 may be connected to the lid portion 22 or the lid portion 32 via a curved portion.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2021-030745 | Feb 2021 | JP | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/JP2022/007389 | 2/22/2022 | WO |
