JP2004138353A - Air conditioner for board - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioner for board capable of reducing generation of noise. <P>SOLUTION: This air conditioner for board comprises a casing 1 divided to a first chamber 9 and a second chamber 10 by a partition wall 2. The second chamber 10 has an outside air intake port 21 and a warm air discharge port 22 in the first surface 1c of the casing 1. A condenser 6 is arranged in a position opposed to the intake port 21 or discharge port 22, and a second fan 12 is provided between the intake port 21 and the discharge port 22 so that a blade is rotated along a plane substantially orthogonal to the first surface 1c. The second fan 12 is opposed to two side surfaces of the casing substantially orthogonal to the first surface 1c. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a cooler for a panel that cools a control panel and the like.
[0002]
BACKGROUND OF THE INVENTION
Conventionally, a panel cooler has been known in which a refrigerant is pumped from an evaporator to a condenser through a conduit by a compressor, and air cooled around the evaporator is blown to a control panel or the like to cool the inside of the control panel. (For example, Patent Document 1).
By the way, in recent years, noise reduction of various industrial equipment has been regarded as important, and noise reduction is also important for this type of cooler. In such a cooler, the wind noise of the heat radiation fan provided on the outside air side is one of the main noise sources.
[0003]
[Patent Document 1]
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a cooler for a panel that can reduce generation of noise.
[0004]
[Means for Solving the Problems]
In order to achieve the above object, according to the present invention, a housing is divided into a first chamber and a second chamber by a partition wall, wherein the first chamber houses an evaporator and a first fan, and the second chamber has Houses a compressor, a condenser and a second fan, and circulates the refrigerant by pumping the refrigerant to the condenser by the compressor via a conduit from the evaporator, thereby circulating the air cooled by the evaporator. In a cooler for a panel that blows air into a panel by a first fan, the second chamber has an intake port for outside air and an exhaust port for warm air on a first surface of a housing, and the intake port or the exhaust port is provided. Disposing the condenser at a position facing the outlet, rotating the blade along a plane substantially perpendicular to the first surface, and interposing the second fan between the intake and the exhaust. And two of the housings that are substantially orthogonal to the first surface. The second fan faces the side surface, and the flow direction of the outside air taken in from the intake port is bent by about 90 ° before reaching the second fan, and from the second fan to the discharge port. The air flow is bent about 90 °.
[0005]
According to the present invention, since the sound from the second fan, which is the sound source, collides with the two side surfaces and does not leak directly from the intake port or the discharge port, noise can be reduced.
[0006]
In the present invention, “partitioning” means that the air in the first chamber and the air in the second chamber are partitioned so that they do not circulate with each other. For example, a gap or a hole in which a drain pan or the like is provided May be formed on the partition wall.
Further, the “panel” includes a controller provided with a control panel and an operation surface, in addition to a so-called control panel.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
First, a cooling system using the main unit cooler will be briefly described.
FIG. 1 is a schematic configuration diagram of a general board cooler.
As shown in FIG. 1, the compressor 3 sends the refrigerant gasified in the evaporator 4 to the condenser 6 via the conduit 5, further sends the refrigerant from the condenser 6 to the expansion valve 7, and circulates the refrigerant. Let it. At this time, the refrigerant gradually liquefies in the condenser 6 and the expansion valve 7. The expansion valve 7 is formed of an extremely thin tube shown by a broken line. The refrigerant exits the expansion valve 7, has a low pressure in a relatively thick pipe in the evaporator 4, and vaporizes again, thereby removing heat around the evaporator 4 and lowering the ambient temperature.
[0008]
The housing 1 is partitioned by a partition wall 2 into a first chamber 9 and a second chamber 10. The first chamber 9 houses the evaporator 4 and the first fan 11. On the other hand, the second chamber 10 houses the compressor 3, the condenser 6, and the second fan 12.
[0009]
Therefore, warm air in a control panel (not shown) is taken into the first chamber 9 from the intake hole by the first fan 11 and passes through the evaporator 4, and the warm air is cooled by the evaporator 4. , Cool air is sent into the control panel. On the other hand, in the condenser 6 provided in the second chamber 10, the refrigerant is compressed to a high temperature, whereas the outside air is passed through the condenser 6 by the second fan 12 to lower the temperature of the refrigerant. ing.
FIG. 1 is a schematic configuration diagram of a general panel cooler, and does not limit the arrangement of each device. For example, the first chamber 9 may be located above or below the second chamber 10.
[0010]
Next, the arrangement of each device in the second chamber 10, which is a main part of the present invention, will be described.
2 and 3 show a first embodiment.
As shown in FIG. 2, the second chamber 10 has an intake 21 for outside air and an outlet 22 for warm air on the first surface 1 c of the housing 1. A support member 20 for supporting the second fan 12 is provided in the second chamber 10. By the support member 20, the second chamber 10 is divided into a first small chamber 10a having the intake port 21 opened and a second small chamber 10b having the discharge port 22 opened.
The condenser 6 is provided at a position facing the intake port 21 in the first small chamber 10a. A compressor 3 is provided in the second small chamber 10b.
[0011]
The second fan 12 shown in FIG. 2 is composed of an axial blower (propeller type blower), the blades of which rotate along a plane substantially perpendicular to the first surface 1c, and the intake port 21. And the discharge port 22. Therefore, the second fan 12 faces the two side surfaces 1a and 1b of the housing 1 which are substantially perpendicular to the first surface 1c. Therefore, the flow direction A of the outside air taken in from the intake port 21 is bent by approximately 90 ° before reaching the second fan 12 as schematically shown in FIG. Is set such that the air flow A bends by about 90 ° before the air flow A reaches.
[0012]
Here, as described above, the second fan 12 is formed of an axial blower, and sends air in the rotation axis direction X of the propeller. Therefore, the noise of the second fan 12 is mainly caused by the wind noise of the propeller generated in the axial direction X.
In the cooler for the main board, since the second fan 12 faces the two side surfaces 1a and 1b, the noise generated in the axial direction X collides with the two side surfaces 1a and 1b and the first surface 1c. Does not leak directly from the intake port 21 and the discharge port 22 provided at the bottom. Therefore, since the sound from the second fan 12, which is the sound source, does not leak directly to the outside air, noise can be reduced.
[0013]
Further, since the second fan 12 is fixed to the support member 20, vibration generated by rotation of the second fan 12 can be reduced. Further, by providing the support member 20 in the second chamber 10, the rigidity of the housing 1 is increased, so that the vibration of the housing 1 itself can be reduced. The sound in the second chamber 10 is attenuated by colliding with the support member 20. Therefore, by providing the support member 20, the noise can be further reduced.
[0014]
A sound absorbing material 25 is attached to four inner surfaces of the second chamber 10. As the sound absorbing material 25, for example, a porous material such as urethane foam, glass wool, or the like can be used. With the sound absorbing material 25, noise in the second chamber 10 can be absorbed, and the noise can be further reduced.
If the sound absorbing material 25 is attached to the ceiling and floor of the second chamber 10, the support member 20, and the like, the noise can be further reduced.
[0015]
As shown in FIG. 3, a louver 27 is provided at each of the inlet 21 and the outlet 22. The louver 27 is composed of a large number of eaves 27a that are inclined obliquely downward toward the outside air. The louver 27 is formed, for example, by punching out the first surface 1c of the housing 1 to form the eaves, or by attaching the eaves separately.
The noise in the second chamber 10 toward the inlet 21 and the outlet 22 once hits the eaves 27a of the louver 27 and does not leak directly to the outside, so that the noise can be reduced.
It should be noted that a door having a louver may be separately attached to the inlet 21 or the outlet 22 of the first surface 1c.
[0016]
Next, a second embodiment will be described.
FIG. 4 shows a second embodiment.
As shown in FIG. 4, a guide member 26 is formed in the second chamber 10 along a flow A of air in the second chamber 10, and a sound absorbing material 25 is provided on the guide member 26. Fixed.
On the other hand, in the second embodiment, the compressor 3 is disposed in the first small chamber 10a so as to face the intake port 21 for outside air, and is provided in the second small chamber 10b so as to face the discharge port 22 for warm air. A condenser 6 is arranged.
Other configurations are the same as those of the first embodiment, and the same or corresponding portions are denoted by the same reference characters, and detailed description and illustration thereof are omitted.
[0017]
Since the sound absorbing material 25 is provided along the flow of air in the second chamber 10, turbulence of air in the second chamber 10 can be prevented, so that noise can be significantly reduced. it can. In addition, since air flows smoothly in the second chamber 10, cooling efficiency can be improved.
[0018]
Further, since the flow A of the outside air flows from the compressor 3 toward the condenser 6, that is, the air flows from the compressor 3, which is a sound source different from the fan 12, to the condenser 6, which hardly becomes a sound source. Therefore, noise can be reduced.
[0019]
【The invention's effect】
According to the present invention, since the second fan is provided along a plane substantially perpendicular to the first surface provided with the inlet and the outlet, noise from the second fan, which is a sound source, is generated by the second fan. Since there is no direct leakage from the outlet, noise can be reduced.
[0020]
In the second chamber having the second fan, if a sound absorbing material is attached to two inner surfaces of the second chamber where the sound from the second fan collides, no noise reverberation occurs in the second chamber. Therefore, noise can be further reduced.
[0021]
In addition, if the intake port and the discharge port are provided with louvers that are inclined obliquely downward toward the outside, noise does not leak directly from the intake port and the discharge port to the outside, further reducing noise. be able to.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of a general board cooler according to the present invention.
FIG. 2 is a plan sectional view showing a second chamber in the cooler for a panel according to the first embodiment of the present invention.
FIG. 3 is a schematic perspective view showing the second chamber.
FIG. 4 is a cross-sectional plan view showing a second chamber in a cooler for a panel according to a second embodiment of the present invention.
[Explanation of symbols]
1: housing 2: partition wall 3: compressor 4: evaporator 5: conduit 6: condenser 9: first chamber 10: second chamber 10a: first small chamber 10b: second small chamber 11: first fan 12: Second fan 20: Support member 21: External air intake 22: Warm air exhaust 25: Sound absorbing material 27: Louver

Claims (6)

The housing is divided into a first chamber and a second chamber by a partition wall, wherein the first chamber houses an evaporator and a first fan, and the second chamber houses a compressor, a condenser, and a second fan. A cooler for a board that circulates the coolant by pumping the coolant to the condenser by the compressor from the evaporator via a conduit, and sends the air cooled by the evaporator into the board by the first fan. At
The second chamber has an outside air intake and a warm air outlet on a first surface of the housing,
Disposing the condenser at a position facing the inlet or the outlet,
The second fan is provided between the intake port and the exhaust port so that the blade rotates along a plane substantially perpendicular to the first surface, whereby the intake port and the exhaust port are provided. Between the outlet, the second fan faces two inner surfaces of the housing that are substantially orthogonal to the first surface,
The flow direction of the outside air taken in from the intake port is bent by about 90 ° until reaching the second fan,
A board cooler in which the flow of air is bent by about 90 ° from the second fan to the outlet. In claim 1,
Providing a support member for supporting the second fan,
A board cooler in which the second chamber is divided into a first small chamber having the intake port opened and a second small chamber having the discharge port opened by the support member. In claim 2,
The condenser is arranged in the first chamber so as to face the intake port,
A panel cooler in which the compressor is disposed in the second chamber. In claim 2,
The condenser is arranged in the second chamber so as to face the outlet,
A panel cooler in which the compressor is disposed in the first compartment. In claim 1,
A cooler for a board, wherein a sound absorbing material is provided on at least two inner surfaces of the second chamber. In claim 1,
A board cooler, wherein the intake port and the discharge port are each provided with a louver inclined obliquely downward toward the outside.

Images