JP5272788B2 - Heat exchanger - Google Patents

Description

  The present invention relates to a heat exchange device for a heating element storage device.

  For example, since a current of several tens of amperes or more flows in a mobile phone base station, it is also expressed as a heating element in a certain point. In other words, cooling is extremely important in order to stabilize the operation. Such a mobile phone base station has the following configuration in order to cool the base station. That is, this type of heating element storage device includes a cabinet that stores a transmitter / receiver serving as a heating element, and a heat exchange device that is attached to an opening of the cabinet. Moreover, it is desired to reduce the installation area as the heating element storage device, and the heat exchange device is required to improve the heat exchange efficiency (see, for example, Patent Document 1).

  Hereinafter, the heat exchange apparatus will be described.

  For example, the heat exchange device has the following configuration in order to be attached to the wall surface of the heating element storage device. That is, as the opening of the apparatus main body, a main body having a first intake port and a first discharge port for the outside air and a second intake port and a second discharge port for the cabinet housing the heating element, and the main body are provided in the main body. The first centrifugal blower for outside air and the second centrifugal blower for inside the cabinet, and a heat exchanger for exchanging heat between outdoor air and cabinet air inside the main body are provided.

JP 2000-161875 A

  In the conventional heating element storage device, electromagnetic noise generated when the first fan and the second fan are driven and controlled using a high-frequency switching drive system such as an inverter may leak from the opening of the apparatus body. there were. Accordingly, an object of the present invention is to reduce electromagnetic noise leaking from the opening of the apparatus main body.

In order to solve this object, the present invention provides a first opening and a first blower for the first environment, a second opening and a second blower for the second environment, the air in the first environment, and the second. A main body provided with a heat exchanger for exchanging heat of air in the environment, and a shielding frame that is attached to at least one of the first and second openings to shield electromagnetic waves, and the shielding frame and the main body At least one contact portion that is electrically connected is provided, and the sealing frame is formed with a seal structure that surrounds the contact portion, and this seal structure is formed on an end surface portion that surrounds the contact portion in part of the coating of the shielding plate. The coating film is formed to be thicker than other parts, and by making the electrical connection between the shielding frame and the main body by the action of the contact portion, the first or second opening can be used. together we can reduce the electromagnetic noise leakage, the first environmental side opening Even when it is provided, the part where the coating is formed thickly contacts the main body and the shielding frame around the contact portion, blocks the intrusion of rainwater from the first environment, and makes the electrical connection between the shielding frame and the main body. It can be maintained for a long time. Then, it is to achieve the goal of Tokoro phase of providing a heat exchange device capable of reducing the leakage of electromagnetic wave noise from the opening.

  Further, it has a tightening structure for fastening the shielding frame to the main body at at least two places, and the contact portion is arranged at a position sandwiched between the tightening structures and at a position approaching one of the tightening structures. A heat exchange device that can reduce the leakage of electromagnetic noise from the opening by making the shield plate abut against the main body and making electrical connection with the main body by the action of the connection structure. To achieve the desired goal.

As described above, the present invention provides the first opening for the first environment and the first blower, the second opening for the second environment, the second blower, the air in the first environment, and the heat of the air in the second environment. A main body having a heat exchanger for exchanging; and a shielding frame that is attached to at least one of the first and second openings to shield electromagnetic waves, and electrically connects the shielding frame and the main body. At least one contact portion is provided, and the shielding frame is formed with a seal structure surrounding the contact portion, and the seal structure is formed by coating a coating film on an end surface portion surrounding the contact portion in a part of the coating of the shielding plate. Since it is formed thicker than the part and the electrical connection between the shielding frame and the main body is facilitated by the action of the contact part, leakage of electromagnetic noise from the first or second opening can be reduced. it can.

In particular, even when the first environment side opening is provided, the portion where the coating film is thickly adheres the main body and the shielding frame around the contact portion to block intrusion of rainwater from the first environment, and the shielding frame. Can be maintained over a long period of time.

The figure which shows the whole heat generating body accommodating apparatus of Embodiment 1 of this invention, and the heat exchanger attached to there. The figure which shows the structure of the same heating element storage device Front view of the heat exchanger The figure which attaches the shielding frame of the same heat exchange device to the body The figure which shows the seal structure of the embodiment A view from the side of the seal structure ((a) a view when a projection is provided on the shielding frame, (b) a view when a main body is provided on the main body) The figure which shows the state which attached the shielding frame to the main body

According to the first aspect of the present invention, the first opening and the first blower for the first environment, the second opening and the second blower for the second environment, the air of the first environment, and the second environment. A main body provided with a heat exchanger for exchanging heat of air; and a shielding frame that is attached to at least one of the first and second openings to shield electromagnetic waves, and electrically connects the shielding frame and the main body. At least one contact portion to be connected to the sealing frame, and a sealing structure surrounding the contact portion is formed on the shielding frame, and the sealing structure is a coating film on an end surface portion surrounding the contact portion in a part of the coating of the shielding plate. Is formed thicker than other parts, the part where the coating film is thickly adheres the main body and the shielding frame around the contact part, and the action of the contact part causes the shielding frame and the main body to be in close contact with each other. Make a metal shield structure with the same potential by making electrical connection. Kill.

The invention according to claim 2 of the present invention has a tightening structure for fastening the shielding frame to the main body at at least two locations, and the contact portion is located between the tightening structure and one of the tightening structures. It is characterized by the fact that it is placed at a close position, and by the action of the connection structure, the shield plate is securely brought into contact with the main body to make electrical connection with the main body, and the metal of the same potential A shield structure can be used.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
The building 1 of FIG. 1 is provided with a mobile phone base station 3 on its rooftop 2. As shown in FIG. 1, the mobile phone base station 3 includes a box-like cabinet 4, a transmitter / receiver 5 provided in the cabinet 4, and a heat exchange provided at the front opening of the cabinet 4 so as to be opened and closed like a door. The apparatus 6 is comprised.

  As shown in FIG. 2, the heat exchanging device 6 serves as a first opening for the outside air (first environment), and is used for the first intake port 7, the first discharge port 8, and the cabinet 4 (second environment). A main body 11 having a second intake port 9 and a second discharge port 10 as a second opening, and a first centrifugal blower 12 for outside air (first environment) provided in the main body 11 and in the cabinet 4 (second Environment) second centrifugal blower 13, heat exchanger 14 that performs heat exchange between outside air (first environment) and cabinet 4 (second environment) in the main body 11, and these first centrifugal blowers 12 and a control device 15 for driving the second centrifugal blower 13.

  Further, although not shown, the heat exchanger 14 is formed by alternately superposing resin heat transfer plates and forming an air passage for the first environment and an air passage for the second environment at a fine pitch therebetween. is there. In the heat exchanger 14, a first outlet 14 a that directly faces the first outlet 8 and a second outlet 14 b that directly faces the second outlet 10 are formed.

  Further, as shown in FIG. 2, the second centrifugal blower 13, the heat exchanger 14, and the first centrifugal blower 12 are arranged in the vertical direction from the top of the main body 11. And the control apparatus 15 is arrange | positioned on the back side of the 2nd centrifugal blower 13, and the upper part of the heat exchanger 14. FIG. Moreover, the 2nd air path 14c for 2nd environments which connects the air in the cabinet 4 through the 2nd inlet port 9 or the 2nd centrifugal blower 13, the heat exchanger 14, and the 2nd discharge port 10 is formed.

  Then, the first air passage 14d for the first environment that communicates with the outside air from the first intake port 7 through the first centrifugal blower 12, the heat exchanger 14, and the first discharge port 8 is formed.

  As shown in FIG. 3, the first discharge port 8 has a lattice 16 a having an outer shape larger than the opening of the first discharge port 8 so as not to obstruct the discharged air in the opening. At least one of the shielding frame 16 and the main body 11 is electrically connected to a portion where the surface of the main body 11 made of an aluminum / zinc alloy-plated steel plate that is not coated is provided. A contact portion 17 is formed.

  As shown in FIG. 4, the contact portion 17 includes a projection 18 provided on the shielding frame 16 and a receiving portion 19 provided on the main body.

  Then, as shown in FIG. 5, a seal structure 20 surrounding the contact portion 17 is formed on the shielding frame 16.

  The seal structure 20 is configured such that the projecting portion 18 of the shielding frame 16 is not painted and the periphery thereof is surrounded by a coating film. Furthermore, as shown to Fig.6 (a), in the coating 21 of the shielding frame 16, the coating film 21a of the end surface part surrounding the contact part 17 is formed thickly compared with another part.

  And as shown in FIG. 7, it has two rivets 22 (or screws) as a fastening structure for fastening the shielding frame 16 to the main body in at least two places, and the contact portion 17 has two rivets as the fastening structure. It is arranged at a position sandwiched between 22 and a position brought close to the rivet 22 which is one tightening structure.

  In the above configuration, when the heat exchanging device 6 is operated, that is, when the first centrifugal blower 12 and the second centrifugal blower 13 are operated, the first environment air passes through the first air passage 14d and the second air passage 14c. The air and the air in the second environment exchange heat, and the heat generated in the second environment is released to the first environment. At this time, the control device 15 performs PWM control, which is a high-frequency switching drive system, on the brushless DC motors of the first centrifugal blower 12 and the second centrifugal blower 13 to ensure a predetermined blowing amount. Therefore, electromagnetic noise generated from the internal wiring of the control device 15 and the heat exchange device 6 may leak from the first and second openings of the main body 11. In particular, radio noise generated from the internal wiring of the control device 15 and the heat exchange device 6 disposed above the heat exchanger 14 causes the first discharge port 8 to directly enter the first outlet 14 a of the resin heat exchanger 14. Compared with the other parts, it is easier to leak from the first outlet 14a to the outside through this first outlet 8 than in the other part.

  Therefore, in the present embodiment, the shielding frame 16 is provided at the first discharge port 8 and an electrical connection is made by contact between the protrusion 18 constituting the contact portion 17 and the receiving portion 19. 11 and the shielding frame 16 have the same potential to form a metal shield structure, radiation noise can be effectively shielded. Further, the shielding frame 16 is provided at the first discharge port 8 exposed to the outside air, and the permanent contact of the contact is an issue. However, as in the present embodiment, the sealing structure 20 is provided. Thus, it is possible to easily protect the contact portion 17 by preventing rainwater from entering from outside air. The shielding frame 16 is fastened to the surface of the main body 11 with two rivets 22 with the contact portion 17 interposed therebetween. Furthermore, since one rivet 22 is fastened at a position close to the contact portion 17, even if the shielding frame 16 extends due to thermal expansion, the connection is not released.

  As described above, the main body 11 and the shielding frame 16 are electrically connected by forming the contact portion 17 in which the projection 18 is provided on the shielding frame 16 and the receiving portion 19 provided on the main body 11 is brought into contact. The shield structure can be made of a metal having the same potential, and electromagnetic noise generated from the internal wiring of the control device 15 and the heat exchange device 6 can be prevented from leaking outside the main body 11. Further, the contact portion 17 can be easily and reliably formed only by providing the projection 18 on the shielding frame 16, and can maintain the connection for a long period of time. There is.

  Further, in the present embodiment, the seal structure 20 is formed by configuring the main body 11 with a material that does not require painting and painting the shielding frame 16 that covers the opening. Thereby, the grid | lattice 16a part of the shielding frame 16 can also be painted in the same process, and the rust prevention of the grid | lattice 16a part arrange | positioned so that an air path may be interrupted can also be strengthened. In particular, since the lattice 16a portion is formed thinner than the other portions, even if an aluminum / zinc alloy plated steel plate is used as in the case of the main body 11, the end surface portion when pressed is required to be protected against rust. . Therefore, forming the seal structure 20 in the process of anticorrosion treatment called coating can be performed very inexpensively and easily, and the cost effect is great.

  In the present embodiment, the contact portion 17 has a configuration in which the projection 18 is provided on the shielding frame 16 and the receiving portion 19 is provided on the main body 11. However, as shown in FIG. It is good also as a structure which provided the main body protrusion 24 in the receiving part 23 and the main body 11. FIG. Further, the receiving part 19 and the shielding frame receiving part 23 may be flat or may be connected by forming a concave shape in accordance with the shape of the projecting part 18 and the main body projecting part 24. However, when the concave shape is formed, the contact area can be increased, and it is easy to maintain the connection over a long period of time.

  Moreover, although the form which attached the shielding frame 16 to the 1st discharge port 8 was demonstrated, it is not limited to the 1st discharge port 8, Even if it is the 1st suction port 7, the 2nd discharge port 10 or 2nd. Even if it is the inlet port 9, what is necessary is just to arrange | position to the location where electromagnetic wave noise leaks, and it is not limited to the arrangement location.

  Moreover, although the material of the main body 11 was demonstrated with the aluminum and zinc alloy plating steel plate, if it is the material which the metal part exposed, like a zinc steel plate, an effect | action and an effect will not change.

  Moreover, although the example which used the brushless DC motor for the 1st centrifugal blower 12 and the 2nd centrifugal blower 13 was demonstrated, the motor drive system by a high frequency switching drive system, ie, the drive system by PWM control of AC induction motor, or DC by high frequency switching -The same operation and effect can be obtained if a DC motor drive system using a DC converter power supply is used.

  A heat exchanger for exchanging heat between the first opening for the first environment and the first blower, and the second opening for the second environment, the second blower, and the air in the first environment and the air in the second environment. And a shielding frame attached to at least one of the first and second openings, and provided with at least one contact portion for electrically connecting the shielding frame and the body. Since the seal structure surrounding the contact portion is formed and the shielding frame and the main body are easily electrically connected by the action of the contact portion, leakage of electromagnetic noise from the first or second opening The present invention is applied to a heat exchanging device that reduces heat.

DESCRIPTION OF SYMBOLS 3 Cellular phone base station 4 Cabinet 5 Transmitter / receiver 6 Heat exchange device 7 1st inlet port 8 1st outlet port 9 2nd inlet port 10 2nd outlet port 11 Main body 12 1st centrifugal blower 13 2nd centrifugal blower 14 Heat Exchanger 15 Control device 16 Shielding frame 17 Contacting part 18 Protruding part 19 Receiving part 20 Sealing structure 21 Painting 22 Rivet 23 Shielding frame receiving part 24 Main part projecting part

Claims (2)

A heat exchanger for exchanging heat between the first opening for the first environment and the first blower, and the second opening for the second environment, the second blower, and the air in the first environment and the air in the second environment. A main body and a shielding frame that shields electromagnetic waves by attaching to at least one of the first and second openings, and provided with at least one contact portion that electrically connects the shielding frame and the main body, The shielding frame is formed with a seal structure surrounding the contact portion, and this seal structure is formed by forming a coating film on an end surface portion surrounding the contact portion thicker than other portions in a part of the coating of the shielding plate. Heat exchange device provided . There are first and second fastening structures for fastening the shielding frame to the main body in at least two places, and the contact portion is located between the first and second fastening structures and close to one of the fastening structures. The heat exchange device according to claim 1, wherein the heat exchange device is disposed at a different position.

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