JP2541408Y2 - Heat exchanger mounted inside the control panel - Google Patents

Description

[Detailed description of the invention]

[0001]

This invention is based on the idea that the air inside the control panel and the air outside the control panel are forcedly convected alternately through a plurality of rectangular channels by fans provided inside and outside the control panel. The present invention relates to a heat exchanger mounted in a control panel for exchanging heat through a heat transfer plate forming a heat exchanger.

[0002]

BACKGROUND ART heat exchanger attached to the control panel, the outside air that communicates with the inside air-side <br/> rectangular channel communicating with the usual plurality juxtaposed the rectangular channel control cabinet and outside the control panel It is air-tightly separated from the rectangular flow path, and for that purpose, every other upper and lower end surface of the rectangular flow path is sealed. Conventionally, as an example of such sealing, Japanese Utility Model Laid-Open No. 61-175781, Japanese Utility Model Application Laid-Open No.
As disclosed in Japanese Patent No. 3180, there is a structure in which a rubber sealing member is fitted and fixed. In the case of sealing with the rubber sealing member, adhesion between the rubber sealing member and the heat transfer partition is not reliable, and reliability is required in maintaining airtightness for a long time. Further, when the present invention is applied to a structure in which a thin plate is bent into a corrugated shape as a heat transfer partition, the above-mentioned inconvenience is more concerned because the corrugated heat transfer plate is easily bent by an external force. In order to prevent this problem, it is conceivable to fix the heat transfer partition and the rubber sealing member with an adhesive. However, in this case, workability is deteriorated, resulting in an increase in cost. On the other hand,
As disclosed in Japanese Patent Publication No. 10593, there is a structure in which a comb-shaped sealing metal is used as a backup member and a sealing material is filled. When the sealing material is filled and sealed, the sealing material itself acts as an adhesive, so that it can be expected to maintain airtightness for a long time even when applied to a thin corrugated heat transfer plate.

[0003]

The above-mentioned conventional heat exchangers have not been sufficiently considered for accidental splashing water in a state where the heat exchanger is mounted in a control panel. Heat exchanger has an intake hole and an exhaust hole of the control board outside air (outside air), it may scatter water is <br/> enter immersed in outdoor air side rectangular passage than those of the opening. It retained without being drained to the lower end of the outside air-side <br/> rectangular passage though inundation not to room air rectangular flow path by the lower end face sealing structure on the rectangular channel mentioned above, the mounting surface of the heat exchanger Water leaked into the control panel and rust and corrosion of the heat exchanger case.

[0004] This invention has been made to solve the above problems, obtaining accidental splashing incoming water and the like immersion heat exchanger attached to promptly drained can Ru Control panel in even The purpose is to:

[0005]

Means for Solving the Problems] in the control panel according to this invention
The heat exchanger attached to the heat exchanger is formed by bending a thin plate into a corrugated shape to form a flow path for the heat transfer plate, and at the lower end of the heat transfer plate, a horizontal substrate portion extending in the lateral direction in contact with the front surface of the heat transfer plate. If, arranged a seal fitting having a plurality of fingers branching from the upper edge of the lateral substrate portion in the outdoor air side square passages inclined upwards, outside air
The lower end surface of the side rectangular flow path is filled with a sealing member along the finger of the sealing fitting and sealed, and over the entire length of the horizontal substrate portion.
Heat transfer plate by the protruding part of the continuous sealing member
The entire length of the seal fitting in contact with the lower end portion is sealed, while the inner surface of the outer wall is airtightly adhered to the horizontal substrate portion, and the lower end portion of the external air intake hole formed in the outer wall is disposed below the upper edge portion of the horizontal substrate portion. It was established.

[0006]

[Action] In this invention, the outside air intake hole and splashing water Type immersion from fan exhaust hole to the outside air-side rectangular channel within the finger portion branching from the side plate portion of the seal fitting at the lower end of the outside air-side rectangular channel Seal member and seal part filled on the lower surface
The protrusion of the material prevents the water from leaking downward, and is quickly drained from the outside air intake hole.

[0007]

EXAMPLES Hereinafter, a description will be given of an embodiment of the invention by FIGS. In the figure, reference numeral 1 denotes a heat exchanger mounted on the inner surface of a door 14 of the control panel, which is separated into a space 50 inside the control panel and a space 51 outside the control panel by a casing of the control panel including the door 14. Reference numeral 2 denotes a case of the heat exchanger 1, which is formed in a vertically long box shape, has outer bending flanges 2B for attachment to the door 14 formed on the left and right, and has upper and lower inner bending flanges 2C.
Are formed. Door 1 in front of flanges 2B and 2C
A packing 8 is attached for airtightness between the case 4 and the case 2. A bottom surface 2A of the case 2 is provided with an inside air intake hole 2D and an inside air exhaust hole 2E. The heat transfer plate 3 housed in the center of the case 2 bends a thin plate into a corrugated shape,
A large number of partition portions 3A are formed at equal intervals, and both end portions in the longitudinal direction are alternately connected by bridging portions 3B. This heat transfer plate 3 forms a plurality of alternating inside air side rectangular flow paths 52 and outside air side rectangular flow paths 53.

Reference numeral 4 denotes an upper seal fitting, which is a horizontal board portion 4A tightly fixed to the case bottom surface 2A, and a plurality of finger portions 4B branched from the lower edge portion into the inside air side rectangular flow path 52 in a comb-like shape. Having. Reference numeral 6 denotes a seal member filled at the upper end of the inside air side rectangular flow path 52 as a backup member for the finger portion 4B. Reference numeral 5 denotes a lower seal fitting disposed on the lower end side of the heat transfer plate 3, a horizontal board portion 5 </ b> A extending in the horizontal direction in contact with the front bridge portion 3 </ b> B of the heat transfer plate 3 on the same surface as the case flange 2 </ b> B. A plurality of fingers 5B branched into the outside air-side rectangular channel 53 in a comb-like shape from the upper edge of the horizontal substrate 5A, and are bent at right angles from both ends of the horizontal substrate 5A and fixed to the side surface of the case 2. Mounting leg 5C. As shown in FIG. 3, the finger portion 5B is bent at an obtuse angle with a slight gradient θ so that the depth side of the rectangular flow path becomes higher. A seal member 6 is filled at the lower end of the outside air side rectangular channel 53 as a backup member for the finger 5B. Sealing member 6 is filled to form the protruding portion 6A as to shown in FIG. 3, the protruding portion 6A is continuous over the entire length of the horizontal plate portion 5A, the heat transfer plate 3 lower end
The entire length of the lower seal fitting 5 in contact is sealed . A packing 9 is attached to the front surface of the horizontal substrate portion 5A for airtightness with the inner surface of the door 14. Thus, the heat exchanger 1
The inside air side and the outside air side are hermetically sealed.

Reference numeral 7 denotes a horizontal member disposed on the upper portion of the heat transfer plate 3. The left and right ends are fixed to the case 2, and an inclined portion 7A for improving its mechanical strength and deflecting the flow of outside air is formed. ing. An inside air intake hole 2D of the case 2 communicates with the inside air side rectangular flow path 52, and an inside air suction fan 10 is attached to the inside air exhaust hole 2E via an attachment plate 11,
An inclined portion 11A for deflecting the flow of the inside air is formed on the upper edge of the mounting plate 11. At the middle of the door 14, an outside air intake hole 14A communicating with the outside air side rectangular flow path 53 is provided, and the lower end thereof is a horizontal substrate portion 5A of the lower seal fitting 5.
Is provided at the same position as or lower than the upper edge portion . An outside air exhaust hole 14 </ b> B is provided at an upper portion, and an outside air suction fan 12 is mounted via a mounting plate 13. 30 is the upper part of the case bottom surface 2A and the mounting plate 11
In mounted terminal block at the top, the lead line 10A of the inner air and the outdoor air suction fan 10, 12, 12A are connected to the inside of the terminal block 30 respectively, the wire 40 in the outer
Wired. Then, the terminal is wired to the power supply from the more convenient one of the two terminal blocks 30.

When the heat exchanger 1 is operated, high-temperature air in the control panel internal space 50 is sucked through the internal air intake hole 2D as shown by an arrow a, is diverted in the internal air side rectangular flow path 52, and is again diverted by the fan 10. It is returned to the space 50 in the control panel. on the other hand,
The low-temperature air in the control panel outside space 51 is sucked from the outside air intake hole 14A as shown by the arrow b, is diverted in the outside air side rectangular channel 53, and is returned to the control panel outside space 51 by the fan 12. Due to the forced convection , heat exchange is performed via the partition wall portion 3A of the heat transfer plate, and the air in the control panel is cooled.

When a relatively large amount of scattered water falls on the control panel due to a breakage of a cooling hose of a machine tool or the like, the scattered water 53A flows from the outside air intake hole 14A into the outside air side rectangular channel 53 as shown by a broken line in FIG. to enter immersion of as far as it will go. However, as described above, due to the filling of the seal member 6 acting as an adhesive such as a silicone sealant, the lower end of the outside air-side rectangular flow path 53 has the finger 5B of the lower seal fitting 5 and the both-side partition 3A of the heat transfer plate 3. The rear bridge portion 3B is integrally bonded, and the front bridge portion 3B of the heat transfer plate 3 and the horizontal substrate portion 5A of the lower seal fitting 5 are also integrally bonded by the protrusion 6A of the seal member 6. , Downward leakage is reliably prevented. Then, the outside air without because the lower end of the outside air intake hole 14A is provided at a position lower than the upper edge of the horizontal plate portion 5A of the lower seal fitting 5, splashing water 53A is staying in the outdoor air side rectangular channel 53 The water is drained from the intake hole 14A. In addition, since the finger portion 5B of the lower seal fitting 5 is inclined so as to be higher toward the back side, even if the control panel is slightly inclined rightward in FIG. Is prevented from flowing out. Splashing water 53A you type immersion from the outside air exhaust hole 14B is also drained similarly falls outside air-side rectangular channel 53. Thus immersion leakage due to long-term residence of water inlet, it is possible to prevent rusting, corrosion defects such as.

In addition, control is performed by cutting or the like of a machine tool.
There are many outside air environments where oil mist is floating around the panel.
No. These outside airs are sucked into the outside air side rectangular channel 53.
As a result, the oil mist adheres to the flow path wall surface and gradually accumulates.
Then, it is liquefied by the heat in the panel and runs down the channel wall
It drips and becomes a pool of oil. However, the splash water
Drained to the outside without stagnation as in 53A
Failures such as leakage to the side, rusting, and corrosion can be similarly prevented.
You.

[0013] Next, FIG. 4 another embodiment of this invention
Shown in In the figure, reference numeral 20 denotes a heat exchanger suitable for a control panel having a relatively low height. The heat exchanger 20 has the inside air suction fan 10 mounted outside the case 2 and the case 2 is cut in the vertical direction to a length substantially equal to the lower end of the heat transfer plate 3, and the lower surface of the heat exchanger 20 is a separate lower case. It is configured to cover at 21. The horizontal board portion 5A of the lower seal fitting 5 also serves as a lower flange of the case 2, and a packing 8 is continuously attached to the upper and left and right flanges for airtightness with the door 14. The lower end of the outside air- side rectangular flow path 53 is filled with a seal member 6 in exactly the same manner as in the embodiment of FIGS. The filling operation of the seal member 6 is performed with the lower case 21 removed, and the lower case 21 is fixed to the case 2 by riveting or the like. The inside air exhaust hole 2E is provided below the heat transfer plate 3, and the inside air suction fan 10
Is attached via a mounting table 22, and the lead wire 10A of the inside air suction fan 10 is connected to the electric wire 40 via a general connection terminal. The other parts are
The description is omitted because it is the same as FIG. In this embodiment
In this case, the same effect as in the previous embodiment can be obtained.

In the above description, the heat exchangers 1, 2
Although the type in which the front face of O is closed by the door 14 has been described, the present invention can be similarly applied to a type in which the front face is closed by a dedicated lid. In this case, the space between the lid and the case 2 and the horizontal substrate 5A of the lower seal fitting 5 may be sealed by a seal member 6 instead of the packings 8 and 9 .

[0015]

As described above, according to the invention] According to this invention, scattering water and oil mist entering from the outside air intake hole and the fan exhaust hole to the outside air-side rectangular passage is at the lower end of the outside air-side rectangular channel, Upward from the upper end of the horizontal board of the seal
Oyo sealing member filled in the finger lower surface branching inclined to
Leakage downward by the protruding portion of the prime mover is reliably prevented, since it is configured to be quickly discharged from the outside air intake hole, infiltration water and water leakage due to long-term retention of the oil mist, rust, a defect such as corrosion A heat exchanger that can be prevented is obtained.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view illustrating a heat exchanger according to an embodiment of the present invention.

FIG. 2 is a perspective view of a main part of FIG.

FIG. 3 is a vertical sectional view of a main part of FIG.

FIG. 4 is a longitudinal sectional view showing a heat exchanger according to another embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 heat exchanger 2 case 3 heat transfer plate 4 upper seal metal 5 lower seal metal 4A, 5A horizontal substrate 4B, 5B finger 6 seal member 6A protrusion 10 inside air suction fan 12 outside air suction fan 14 door 14A outside air suction hole 14B Outside air exhaust hole 52 Inside air side rectangular channel 53 Outside air side rectangular channel

Claims (1)

(57) [Scope of request for utility model registration] 1. A box-like case accommodates a heat transfer plate having a plurality of flow passages formed therein and forced convection fans inside and outside a control panel disposed above and below the heat transfer plate. Alternately and airtightly sealed to form an inside air passage and an outside air passage, and forced convection between the control panel air and the control panel outside air alternately in the flow path to heat the heat through the heat transfer plate. Take it inside the control panel
In the heat exchanger to be attached , the flow passage is formed by bending a thin plate into a corrugated shape, and a horizontal substrate portion extending in a lateral direction at a lower end portion of the heat transfer plate in contact with a front surface of the heat transfer plate. Inclined upward from the upper edge of the part
A seal having a plurality of fingers that branch into the outside air flow path, and sealing a lower end surface of the outside air flow path with a seal member filled along the fingers of the seal. Stop,
In addition, the protruding portion of the seal member is entirely covered with the horizontal substrate portion.
The continuous contact over the lower end of the heat transfer plate
The entire length of the seal fitting is sealed, the inner surface of the outer wall is airtightly adhered to the lateral substrate portion, and the lower end of the external air intake hole provided in the outer wall is disposed below the upper edge of the lateral substrate portion. The heat exchanger installed in the control panel.