JP3826869B2 - Electrical component box - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electrical component box.
[0002]
[Prior art]
An air conditioner generally includes an outdoor unit and an indoor unit. Then, an electrical component box 51 as shown in FIG. 7 is arranged in the outdoor unit, and a substrate 54 on which various electrical components 52... Are mounted is accommodated in the electrical component box 51. By the way, since the outdoor unit is installed outside, rainwater, mist, etc. enter the outdoor unit casing 53 through an opening provided in the outdoor unit casing 53, and the moisture drops on the substrate 54. Furthermore, there is a possibility that internal dew condensation water due to snow accumulation in the winter may drip onto the substrate 54. If moisture drops on the substrate 54, the electrical component is damaged, and conventionally, the upper opening of the electrical component box 51 is covered with a cover 55 (see, for example, Patent Document 1). .
[0003]
[Patent Document 1]
Japanese Patent No. 3075099 (page 2-4, FIG. 1 and FIG. 2)
[0004]
[Problems to be solved by the invention]
However, as described above, various types of electrical components 52 are accommodated in the electrical component box 51, and some of the electrical components 52 also have heat generating components. Therefore, if the upper opening of the electrical component box 51 is covered with the cover 55, the interior of the electrical component box 51 becomes a so-called sealed body, and the heat generating component (electronic component) generates heat and the temperature gradually increases. For this reason, the electronic component may be damaged, or the original function as the electronic component may not be exhibited, and the air conditioner may not be driven normally.
[0005]
Therefore, conventionally, an opening is provided in the cover 55 in order to allow cooling air to flow into the electrical component box 51. However, if the cover 55 is provided with an opening, rainwater or the like enters the electrical component box 51 through the opening, and the use of the bar 55 has become meaningless.
[0007]
The present invention was made to solve the above conventional disadvantages, that the object, which is secured in an air passage for cooling the electric instrumentation products (heat-generating component) provides electrical component box that can be It is in.
[0008]
[Means for Solving the Problems]
Accordingly, the electrical component box according to claim 1 is an electrical component box used for the outdoor unit 2 of the air conditioner, and includes a box body 11 for storing the substrate 10 on which the electrical component S is mounted, and the box body 11. A cover member 12 covering the upper opening, and an air intrusion port 25 is provided in the rising peripheral wall 14 of the box body 11, and the cover member 12 is for cooling the electrical component S inside the box body 11. An air passage 23 is provided, and air from the air intrusion port 25 is configured to flow into the air passage 23 .
[0009]
In the electrical component box according to the first aspect, the air that has entered the air intrusion port 25 of the rising peripheral wall 14 of the box body 11 flows into the air passage 23. The electrical component S can be cooled.
[0016]
The electrical component box according to claim 2 is characterized in that a harness lead-out portion 30 is provided in the cover member 12.
[0017]
In the electrical component box according to the second aspect , since the harness lead-out portion 30 is provided in the cover member 12, extreme bending and routing of the harness 27 can be avoided.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Specific embodiments of the terminal board of the present invention will be described in detail with reference to the drawings. FIG. 1 is a simplified perspective view of an electrical component box. This electrical component box 1 is used for an outdoor unit 2 of an air conditioner. As shown in FIG. 6, the air conditioner includes the outdoor unit 2 and the indoor unit 3, and performs an air conditioning operation or the like.
[0019]
That is, the outdoor unit 2 includes a compressor 5, a four-way valve 6, an outdoor heat exchanger 7, an expansion valve 8, and the like, and these are housed in an outdoor unit casing 9 as shown in FIG. In FIG. 1, only the outdoor heat exchanger 7 is shown for the sake of simplification of the drawing. The indoor unit 3 includes an indoor heat exchanger 4 and the like. In this case, the indoor heat exchanger 4 and the like are housed in an indoor unit casing (not shown). For this reason, for example, in order to perform the cooling operation, the compressor 5 is driven by switching the four-way valve 6 to the state indicated by the solid line in FIG. 6. By driving the compressor 5, the refrigerant sequentially flows from the compressor 5 to the four-way valve 6, the outdoor heat exchanger 7, the expansion valve 8, the indoor heat exchanger 4, and the four-way valve 6 to the compressor 5. Return. As a result, the outdoor heat exchanger 7 functions as a condenser, and the indoor heat exchanger 4 functions as an evaporator, so that a cooling operation is performed. In order to perform the heating operation, the compressor 5 is driven by switching the four-way valve 6 to the state indicated by the broken line in FIG. By driving the compressor 5, the refrigerant sequentially flows from the compressor 5 to the four-way valve 6, the indoor heat exchanger 4, the expansion valve 8, the outdoor heat exchanger 7, and the four-way valve 6 to the compressor 5. Return. As a result, the indoor heat exchanger 4 functions as a condenser, and the outdoor heat exchanger 7 functions as an evaporator, so that a heating operation is performed.
[0020]
As shown in FIG. 1, the electrical component box 1 is disposed in an outdoor unit casing 9 and accommodates a substrate (printed substrate) 10 on which various electrical components S ·· are mounted. In this case, the electrical component box 1 includes a box body 11 in which the substrate 10 is accommodated, and the box body 11 is covered with a cover member 12. The box body 11 is composed of a box body having an upper opening shape having a bottom wall 13 and a rising peripheral wall 14 erected from the outer peripheral edge of the bottom wall 13, and the upper opening portion covers the cover. Covered with member 12.
[0021]
The cover member 12 is for drip-proofing preventing rain water and the like from entering the box body 11 and has a double structure of inner and outer covers 15 and 16. The outer cover 16 includes an upper wall 17 and a suspended peripheral wall 18 depending from the outer peripheral edge of the upper wall 17. When the outer cover 16 is attached to the box body 11 as shown in FIG. It is arranged outside the upright peripheral wall 14 of the box body 11. The inner cover 15 includes an upper wall 20 and a suspended peripheral wall 21 depending from the outer peripheral edge of the upper wall 20, and when the inner cover 15 is attached to the box body 11, the suspended peripheral wall 21 is a rising periphery of the box body 11. It is arranged inside the wall 14.
[0022]
As shown in FIG. 1, the hanging peripheral wall 21 of the inner cover 15 is provided with notches 22..., And the electrical components S inside the box body 11 are cooled by the notches 22. An air passage 23 is formed. That is, in the inner cover 15 shown in FIG. 1, two cutout portions 22 and 22 are formed. For example, if the cutout portion 22 of (1) is used as the inlet of the air passage 23, the cutout portion (2) The notch 22 serves as an outlet of the air passage 23. And the notch parts 24 and 24 are provided also in the standing peripheral wall 14 of the box main body 11, and one notch part 24 corresponding to the notch part 22 of said (1) comprises the air intrusion opening 25, The other notch 24 corresponding to the notch 22 in the above (2) constitutes an air outlet 26.
[0023]
The inner cover 15 is made of a transparent plastic such as PVC (polyvinyl chloride). This PVC is excellent in water resistance, flame retardancy, weather resistance and the like. Thus, the inner cover 15 is made of transparent plastic, so that the outer cover 16 is removed and the board 10 of the box body 11 and the electrical equipment mounted (mounted) on the board 10 from the outside of the inner cover 15. The product S .. can be observed. In addition, as the outer cover 16, various plastics and metals excellent in water resistance etc. can be used, and they may be transparent or opaque. Further, when the inner and outer covers 15 and 16 are attached to the box body 11, for example, locking means (not shown) for locking (for example, a locking claw and a locking claw with which the locking claw is detachably locked). It is preferable to be held in a state of being locked to the box body 11 by a convex portion or the like), but it may be simply fitted without providing such locking means.
[0024]
By the way, since the harness (electric wire) 27 (see FIG. 3) is wired (connected) to the connector of the substrate 10, the harness lead-out portion 30 is formed in the cover member 12. That is, as shown in FIG. 3, an L-shaped receiving piece 33 composed of a bottom 31 and an upright portion 32 is provided on a part of the inner surface of the rising peripheral wall 14 of the box body 11 and corresponds to this. An opening 34 is provided in the rising peripheral wall 14. That is, in the harness lead-out portion 30, the rising portion 32 of the receiving piece 33 faces the opening 34 of the rising peripheral wall 14. In this case, the harness 27 is inserted into the box body 11 from the opening 34 of the rising peripheral wall 14 and is temporarily received by the receiving piece 33, and the connector is connected to the connector on the substrate 10.
[0025]
According to the electrical component box, the hanging peripheral wall 21 of the inner cover 15 of the cover member 12 is arranged inside the rising peripheral wall 14 of the box body 11 and the hanging peripheral wall of the outer cover 16 of the cover member 12. 18 is disposed outside the rising peripheral wall 14 of the box body 11, so that the rising peripheral wall 14 of the box body 11 is sandwiched between the hanging peripheral walls 21 and 18 of the inner and outer covers 15 and 16. It becomes. For this reason, even if mist (liquid fine particles) enters from a gap between the hanging peripheral wall 18 of the outer cover 16 and the rising peripheral wall 14 of the box body 11, the mist enters between the inner and outer covers 15 and 16. Therefore, it is difficult to enter the inside of the box body 11, that is, the substrate 10 side. Further, since the inner cover 15 of the cover member 12 is transparent, if the outer cover 16 is removed, the electrical components on the substrate 10 can be observed while the inner cover 15 is attached. For this reason, even if the cover member 12 has a double structure, the connection state (connector disconnection, etc.) of the harness (electric wire) 27 and the display state of the failure indicator lamp 28 can be observed, and maintenance inspection is easily performed. be able to. The failure indicator lamp 28 is lit when an abnormal state such as an abnormal operation occurs. The failure indicator lamp 28 is provided on the substrate 10, and an abnormal state (failure state) is generated by the lighting of the failure indicator lamp 28. ) Can be detected. Moreover, in the said embodiment, since the inner cover 15 is comprised from PVC, it can set freely from hard to soft by adjustment of a plasticizer etc., Thereby, intensity | strength and rigidity can also be changed, and this cover The member 12 can be easily formed of an optimal material. Moreover, PVC is recyclable and is excellent in terms of resource saving.
[0026]
Furthermore, since the harness lead-out portion 30 is provided in the cover member 12, extreme bending and routing of the harness 27 can be avoided. Moreover, in this harness lead-out portion 30, the rising portion 32 of the receiving piece 33 faces the opening 34 of the rising peripheral wall 14, so that even if mist or the like enters the rising peripheral wall 14 from the opening 34. The mist and the like are received at the rising portion 32 and the bottom portion 31 and do not enter the box body 11. Furthermore, since the air that has entered the air intrusion port 25 of the rising peripheral wall 14 of the box body 11 flows into the air passage 23, the electrical component S inside the box body 11 can be cooled. As a result, the electrical component S (heat generating component) can be cooled, and the electrical component S can be prevented from being damaged or malfunctioning, and the air conditioner can perform stable operation over a long period of time. Moreover, since the cover member 12 has a double structure comprising the inner and outer covers 15 and 16, even if notches are provided in the inner and outer covers 15 and 16 in order to introduce cooling air into the electrical component box. The notch positions can be made different between the inner and outer covers 15 and 16. Accordingly, the function (dripproofness) of preventing dripping of moisture onto the substrate 10 due to rainwater or mist intrusion of the cover member 12 is not impaired.
[0027]
Next, FIGS. 4 and 5 show another embodiment. In this case, a plurality of slit-like through holes 35 are provided in a part of the rising peripheral wall 14 of the box body 11, and the through holes 35. The air entry port 25 is Correspondingly, a receding wall portion 36 that is receded to a part of the suspended peripheral wall 21 of the inner cover 15 is formed, and thereby an opening that opens in a direction substantially perpendicular to the opening direction of the through holes 35. A portion 37 is formed. A wind introduction guide portion 39 is provided at the upper opening edge of each through hole 35. In this wind introduction guide portion 39, wind is introduced from below into each through hole 35... As indicated by arrow A in FIG.
[0028]
The air from the air intrusion port 25 enters the space 38 formed by the receding wall portion 36 and the rising peripheral wall 14 of the box body 11, and then changes its direction to open the box body from the opening 37. 11 inside. That is, air from the air intrusion port 25 enters from below and once hits the receding wall portion 36 and then enters the inside of the box body 11, so that air does not directly enter the inside of the box body 11. Further, dripping of moisture onto the substrate 10 can be prevented. Also in this case, if the inner cover 15 is made of transparent plastic, the failure indicator lamp 28 on the substrate 10 can be observed through the inner cover 15.
[0029]
Although specific embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various modifications can be made within the scope of the present invention. For example, the inner cover 15 can be made of various transparent plastics other than PVC (polyvinyl chloride), but preferably has excellent water resistance and can be recycled. Further, the notch shape, size, number, and the like of the notch portion 22 of the inner cover 15 for forming the air passage 23 can be arbitrarily changed. However, rainwater or the like can enter the box body 11 in the air passage 23. Therefore, it is necessary that the moisture does not drip onto the substrate 10.
[0030]
【The invention's effect】
According to the electrical component box of the first aspect, since the air that has entered the air intrusion port of the rising peripheral wall of the box body flows into the air passage, the electrical component inside the box body can be cooled. For this reason, it is possible to prevent the electrical components from being damaged or malfunctioning, and this air conditioner can perform stable operation over a long period of time.
[0034]
According to the electrical component box of the second aspect , since the harness lead portion is provided in the cover member, it is possible to avoid extreme bending and routing of the harness. For this reason, shortening of an electric wire (shortening of a harness) can be achieved, and noise generation can be prevented.
[Brief description of the drawings]
FIG. 1 is a simplified perspective view showing an embodiment of an electrical component box according to the present invention.
FIG. 2 is a simplified cross-sectional view of a main part of the electrical component box.
FIG. 3 is a simplified cross-sectional view of another main part of the electrical component box.
FIG. 4 is a main part perspective view showing another embodiment of the electrical component box according to the present invention.
FIG. 5 is a plan view of an essential part of the electrical component box.
FIG. 6 is a simplified diagram of an air conditioner using the electrical component box.
FIG. 7 is a simplified perspective view of a conventional electrical component box.
[Explanation of symbols]
2 Outdoor unit 10 Substrate 11 Box body 12 Cover member 14 Upright peripheral wall 15 Inner cover 16 Outer cover 18 Suspended peripheral wall 21 Suspended peripheral wall 23 Air passage 25 Air intrusion port 30 Harness extraction part S Electrical component

Claims (2)

An electrical component box used for the outdoor unit (2) of the air conditioner, the box body (11) storing the board (10) on which the electrical component (S) is mounted, and the box body (11) A cover member (12) covering the upper opening, and an air intrusion port (25) is provided in the rising peripheral wall (14) of the box body (11), and the box body ( 11) An air passage (23) for cooling the internal electrical component (S) is provided, and air from the air entry port (25) is configured to flow into the air passage (23). Electrical component box to do. Electrical component box according to claim 1, characterized in that provided harness lead-out portion (30) on the cover member (12).

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