JP6297808B2 - Heat exchanger - Google Patents

Description

  The present invention relates to a heat exchanger provided in, for example, a refrigeration circuit used in a vehicle air conditioner.

  Conventionally, a heat exchanger of this type includes a pair of headers extending in parallel with a distance from each other, and a plurality of heats that are connected to each header at both ends and spaced from each other in the direction in which the header extends. Heat transfer fins provided between the exchange tubes and adjacent heat exchange tubes and on the outer sides of the heat exchange tubes located on both outer sides of the header extending direction, and heat transfer fins located on both outer sides of the header extending direction And an end plate having a base that is in contact with the heat transfer fins and an extension that extends from both sides in the width direction of the base toward the outside in the direction in which the header extends (for example, , See Patent Document 1).

  The heat exchanger is attached to other members in the engine room of the vehicle via brackets fixed to the end plates.

JP 2003-94135 A

  The heat exchanger is transmitted with vibrations caused by running of the vehicle and driving of the engine via the bracket. When vibration is transmitted to the heat exchanger, each of the members constituting the heat exchanger vibrates. In particular, the amplitude of the portion of the end plate where the bracket located near the center of gravity of the heat exchanger is fixed is large. There is a case. In this case, the heat transfer fins disposed adjacent to each other due to the vibrating end plate may buckle, and the heat exchange efficiency may be deteriorated or the heat exchanger may be damaged.

  An object of the present invention is to provide a heat exchanger that can prevent deterioration and breakage of heat exchange efficiency by reducing the amplitude of the vibrating end plate.

In order to achieve the above object, the present invention provides a pair of headers extending in parallel to each other at a distance from each other, and a plurality of end portions connected to each header and spaced from each other in the direction in which the headers extend. Heat transfer fins provided on the outside of the heat exchange tube between the heat exchange tubes and the adjacent heat exchange tubes and on both outer sides in the direction in which the header extends, and heat transfer on both outer sides in the direction in which the header extends An end plate provided outside the fin and having a base in contact with the heat transfer fin and an extending portion extending from both sides in the width direction of the base toward the outside in the direction in which the header extends, and on the outside in the direction in which the header of the end plate extends A heat exchanger provided with a bracket used for attachment to another member, and is fixed to a portion of the end plate other than the bracket mounting position by brazing to supplement the end plate. Comprising a reinforcing member for reinforcing members has one end connected to the header and the other end connected to the bracket.
In order to achieve the above object, the present invention provides a pair of headers extending in parallel to each other at a distance from each other, and both end portions thereof are connected to each header, and are arranged at a distance from each other in the extending direction of the header. Heat transfer fins provided on the outer side of the heat exchange tubes located between the plurality of heat exchange tubes and the adjacent heat exchange tubes and on both outer sides in the header extending direction, and located on both outer sides in the header extending direction An end plate that is provided outside the heat transfer fin and has a base portion that contacts the heat transfer fin and an extending portion that extends from both sides in the width direction of the base portion toward the outside of the header extending direction, and a direction in which the header of the end plate extends. A heat exchanger having a bracket provided on the outside and used for mounting to another member, and fixed to the portion of the end plate other than the bracket mounting position by brazing. Comprising a reinforcing member for reinforcing the on the end plate, a plurality of brackets are provided, the reinforcing member, both end portions are connected to the bracket, respectively.
Thereby, since the end plate is reinforced by the reinforcing member, the amplitude of the end plate which vibrates is reduced by transmitting the vibration generated by driving the vehicle or driving the engine.

In order to achieve the above object, the present invention provides a pair of headers extending in parallel to each other at a distance from each other, and both end portions thereof are connected to each header, and are arranged at a distance from each other in the extending direction of the header. Heat transfer fins provided on the outer side of the heat exchange tubes located between the plurality of heat exchange tubes and the adjacent heat exchange tubes and on both outer sides in the header extending direction, and located on both outer sides in the header extending direction An end plate that is provided outside the heat transfer fin and has a base portion that contacts the heat transfer fin and an extending portion that extends from both sides in the width direction of the base portion toward the outside of the header extending direction, and a direction in which the header of the end plate extends. A bracket provided on the outside and used for attachment to another member, wherein the bracket includes an end plate formed so as to extend parallel to the direction in which the end plate extends. Has a connection portion, by fixing the bracket and the end plates by brazing, the reinforcing structure is provided for reinforcing the end plate, the end plate, a plurality of brackets are provided, the bracket close to the center of gravity The length dimension of the connection part is formed larger than the length dimension of the connection part of other brackets .
Thereby, since the end plate is reinforced by the connection portion, the amplitude of the end plate that vibrates is reduced by transmitting the vibration generated by the traveling of the vehicle and the driving of the engine.

  According to the present invention, it is possible to reduce the amplitude of the end plate that vibrates due to the transmission of vibrations generated by driving the vehicle or driving the engine, thereby preventing buckling of the adjacent heat transfer fins. It is possible to prevent deterioration of heat exchange efficiency and damage to the heat exchanger.

It is the schematic of the refrigerant circuit which shows one Embodiment of this invention. It is a front view of a heat exchanger. It is a principal part exploded view of a heat exchanger. It is sectional drawing of an end plate and a bracket. It is sectional drawing of an end plate and a reinforcement member. It is a figure which shows the other example of a bracket and a reinforcement member. It is a figure which shows the other example of a bracket. It is a figure which shows the other example of a bracket. It is a figure which shows the other state of a reinforcement member.

  1 to 5 show an embodiment of the present invention.

  The heat exchanger provided with the end plate of the present invention is applied to a refrigeration circuit such as a vehicle air conditioner. As shown in FIG. 1, the vehicle air conditioner includes a refrigerant circuit 1 to which an outdoor heat exchanger 10 as a heat exchanger provided outside the passenger compartment A is connected. In the refrigerant circuit 1, in addition to the outdoor heat exchanger 10, a compressor 2 for compressing the refrigerant, an indoor heat exchanger 3 provided in the passenger compartment A, and an expansion valve 4 for depressurizing the refrigerant. And are connected.

  The refrigerant circuit 1 cools the interior of the passenger compartment A by dissipating the refrigerant in the outdoor heat exchanger 10 and absorbing the refrigerant in the indoor heat exchanger 3.

  As shown in FIG. 2, each of the outdoor heat exchangers 10 extends in the vertical direction, and has a pair of width direction headers 11 that are spaced apart from each other, one end connected to one header 11, and the other end A plurality of vertical heat exchange tubes 12 connected to the other header 11, a receiver 13 connected to the header 11, and the outside of the heat exchange tubes 12 located between the heat exchange tubes 12 and on both sides in the vertical direction. A plurality of heat transfer fins 14 provided on the outer side, a pair of end plates 15 provided on the outer sides of the heat transfer fins 14 located on both outer sides in the vertical direction, and brackets provided on both longitudinal sides of the end plates 15 16 and a reinforcing member 17 for reinforcing a portion of the lower end plate 15 other than the mounting position of the bracket 16.

Each header 11 is a member formed in a hollow cylindrical shape made of a metal such as aluminum. The end of each heat exchange tube 12 is connected to the outer periphery of each header 11.
One header 11 has a refrigerant inlet 11 a for allowing the refrigerant discharged from the compressor 2 to flow into the header 11, and a refrigerant flow for causing the refrigerant in the header 11 to flow toward the indoor heat exchanger 3. And an outlet 11b.
In the other header 11, a refrigerant outflow path 11 c for allowing the refrigerant in the header 11 to flow into the liquid receiver 13, and a refrigerant inflow path 11 d for allowing the refrigerant that has passed through the liquid receiver 13 to flow into the header 11. , Is provided.
In addition, each header 11 is provided with a plurality of partition portions 11e that partition the inside in the vertical direction, and the flow direction of the refrigerant in each heat exchange tube 12 is determined by the partition portions 11e. In FIG. 2, the refrigerant that has flowed into the one header 11 from the refrigerant inlet 11 a flows through the heat exchange tube 12 a and flows into the other header 11. The refrigerant that has flowed into the other header 11 through the heat exchange tube 12 a flows through the heat exchange tube 12 b and flows into the one header 11. The refrigerant flowing into one header 11 through the heat exchange tube 12b flows through the heat exchange tube 12c, flows into the other header 11, and flows into the liquid receiver 13 through the refrigerant outflow path 11c. The refrigerant that has flowed into the liquid receiver 13 flows into the other header 11 through the refrigerant inflow passage 11d, flows into the one header 11 through the heat exchange tube 12d, and passes through the refrigerant outlet 11b to heat indoors. It flows out toward the exchanger 3.

  Each heat exchange tube 12 is a hollow flat tubular member formed into a flat plate shape by extruding a metal such as aluminum. Each heat exchange tube 12 is arranged such that the longitudinal direction (width direction) of the cross section of the flow path is directed to the flow direction of the air that exchanges heat with the refrigerant. Moreover, each heat exchange tube 12 partitions the inside in the longitudinal direction (width direction) of the flow path cross section, so that the refrigerant flow path as a fluid flow path through which the refrigerant flows is in the longitudinal direction (width direction) of the flow path cross section. A plurality are formed.

  The liquid receiver 13 is made of a metal member such as aluminum and has a cylindrical shape with both ends closed. The liquid receiver 13 is disposed so that the central axis extends in the vertical direction, which is the same direction as the header 11, and is connected to the other header 11 via the refrigerant outflow path 11 c and the refrigerant inflow path 11 d. The liquid receiver 13 contains a dryer and a filter. The moisture in the refrigerant that has flowed into the liquid receiver 13 is removed by the dryer, and foreign substances such as dust in the refrigerant that has flowed in are captured by the filter. The

  The heat transfer fins 14 are made of a member in which a metal plate such as aluminum is formed in a wave shape, and are attached by brazing.

  The end plate 15 is formed, for example, by pressing a metal plate such as aluminum having a brazing material layer. The end plate 15 has a base portion 15a extending along the longitudinal direction, and an extending portion 15b extending at a substantially right angle from both sides in the short direction of the base portion 15a excluding both ends in the longitudinal direction. Both end portions of the end plate 15 in the longitudinal direction are connected to the headers 11 and are fixed to the headers 11 by brazing. Further, the end plate 15 is connected to the heat transfer fin 14 with respect to the base portion 15a by brazing.

  The bracket 16 includes a connection portion 16a connected to the end plate 15, and a locking portion 16b provided to extend from the connection portion 16a and locked to a member in the engine room outside the passenger compartment A. ing. The connecting portion 16a has a width dimension slightly smaller than the dimension between the wall portions 15b, and is formed in a rectangular column shape having a height dimension substantially the same as the height dimension of the wall section 15b. The bracket 16 is attached to the end plate 15 by caulking or the like in a state where the connection portion 16a is accommodated between the wall portions 15b of the end plate 15. The bracket 16 attached to the end plate 15 is fixed to the end plate 15 by brazing. A reinforcing structure is provided between the connecting portion 16a and the end plate 15 to reinforce the end plate 15 by being fixed to the end plate 15 by brazing. The locking portion 16b is fixed to a member in the engine room by a fastening member such as a bolt and a nut. The locking part 16b does not need to be the locking part 16b in which all the brackets 16 are fixed by the fastening member. For example, the outdoor heat exchanger 10 is attached to a member in the engine room as a locking part having a structure in which a part of the brackets 16 is the locking part 16b and the other bracket 16 is engaged with a member in the engine room. Is also possible.

  The reinforcing member 17 is a member formed in a U-shaped cross-section by bending the both sides of the flat metal plate in the width direction at substantially right angles. The reinforcing member 17 has a width dimension that is slightly smaller than the dimension between the wall portions 15b of the end plate 15, and a height dimension that is less than or equal to the height dimension of the wall portion 15b. The reinforcing member 17 is attached to the end plate 15 by caulking or the like in a state where both ends of the bent width direction are accommodated between the wall portions 15b with the end portions 15 facing the base portion 15a side. The reinforcing member 17 attached to the end plate 15 is fixed to the end plate 15 by brazing. The reinforcing member 17 is provided between one header 11 in the width direction and one bracket 16 in the width direction, between one bracket 16 in the width direction and the other bracket 16, and between the other bracket 16 in the width direction and the other header 11 in the width direction. And have a length dimension that does not cause a gap between them. Each reinforcing member 17 is brazed between one header 11 in the width direction and one bracket 16 in the width direction, between one bracket 16 in the width direction and the other bracket 16, and between the other bracket 16 in the width direction and the width. A connection is made between the header 11 in the other direction. Here, between one header 11 in the width direction and one bracket 16 in the width direction, between one bracket 16 in the width direction and the other bracket 16, and between the other bracket 16 in the width direction and the other header 11 in the width direction. Although it is desirable to connect between each other by brazing, it also includes a case where the brazing is not performed and the end portion of the reinforcing member 17 is in contact.

  In the refrigerant circuit 1 including the heat exchanger configured as described above, when the compressor 2 is driven, the refrigerant discharged from the compressor 2 radiates heat in the outdoor heat exchanger 10, and then the expansion valve 4 is opened. The pressure is reduced and the heat is absorbed in the indoor heat exchanger 3 and then sucked into the compressor 2.

  The outdoor heat exchanger 10 is transmitted through the bracket 16 with vibrations caused by running of the vehicle and driving of the engine. In the outdoor heat exchanger 10, stress concentration occurs around the bracket 16 of the lower end plate 15. However, since the lower end plate 15 is reinforced by the connection portion 16a of the bracket 16 and the reinforcing member 17, the amplitude when vibrating due to the transmission of vibration is reduced.

As described above, according to the heat exchanger of the present embodiment, the reinforcing member 17 is provided that is fixed to the portion of the end plate 15 other than the mounting position of the bracket 16 by brazing and reinforces the end plate 15.
As a result, the amplitude of the end plate 15 that vibrates due to the transmission of vibrations generated by driving of the vehicle or driving of the engine is reduced, and the stress acting on the heat transfer fins 14 is reduced. Can be prevented, and deterioration of heat exchange efficiency and damage to the outdoor heat exchanger 10 can be prevented.

The reinforcing member 17 has one end connected to the header 11 and the other end connected to the bracket 16.
Thereby, since the bracket 16 is connected to the highly rigid header 11 via the reinforcing member 17, the amplitude of the end plate 15 between the vibrating bracket 16 and the header 11 can be reliably reduced.

Further, both ends of the reinforcing member 17 are connected to the bracket 16 on the one header 11 side and the bracket 16 on the other header 11 side, respectively.
Thereby, between the bracket 16 in the width direction and the other bracket 16 is connected by the reinforcing member 17, when stress concentrates on a portion between the one bracket 16 and the other racket 16 of the end plate 15. In this case, the amplitude of the vibrating end plate 15 can be reliably reduced.

Further, the bracket 16 has a connecting portion 16a with the end plate 15 formed so as to extend in parallel with the extending direction of the end plate 15, and by fixing the bracket 16 and the end plate 15 by brazing, A reinforcing structure for reinforcing the end plate 15 is provided.
As a result, the amplitude of the end plate 15 that vibrates due to the transmission of vibrations generated by driving the vehicle or driving the engine can be reduced by the connecting portion 16a of the bracket 16. Bending can be prevented, and deterioration of heat exchange efficiency and damage to the outdoor heat exchanger 10 can be prevented.

In the above-described embodiment, the reinforcing member 17 causes the lower end plate 15 between the one header 11 in the width direction and the one bracket 16 in the width direction, and between one bracket 16 in the width direction and the other bracket 16. In this embodiment, the bracket 16 on the other side in the width direction and the header 11 on the other side in the width direction are connected to each other. However, the present invention is not limited to this.
In the outdoor heat exchanger 10 of the embodiment, the liquid receiver 13 is provided on the outer side in the width direction of the other header 11, so that the center of gravity is biased toward the other header 11. When vibration generated by running of the vehicle or driving of the engine is transmitted to the outdoor heat exchanger 10 via the bracket 16, stress concentration occurs around the bracket 16 on the other header 11 side of the lower end plate 15. It is thought to occur. For this reason, the reinforcing member 17 may be provided only in the vicinity of the other bracket 16 in the width direction of the lower end plate 15.
In the present invention, depending on the position of the center of gravity of the outdoor heat exchanger 10 or the position of the bracket 16, the one end in the width direction of the lower end plate 15 and the one bracket 16 in the width direction are provided. Even if the reinforcing member 17 is attached only between the bracket 16 and the other bracket 16 or between the other bracket 16 in the width direction and the other header 11 in the width direction, the same effect as that of the above embodiment can be obtained. Can be obtained.

  In the above embodiment, only the lower end plate 15 is reinforced by the reinforcing member 17, but the present invention is not limited to this. Depending on conditions such as the position of the center of gravity of the outdoor heat exchanger 10 and the position of the bracket, the upper and lower end plates 15 may be reinforced by the reinforcing members 17.

  In the above-described embodiment, the end plate 15 is reinforced by the connecting portion 16a of the bracket 16 and the reinforcing member 17. However, the present invention is not limited to this. The end plate 15 may be reinforced only by the connecting portion 16a of the bracket 16 without using the reinforcing member 17. Alternatively, a bracket having no reinforcing structure may be attached to the end plate 15 and the end plate 15 may be reinforced only by the reinforcing member 17.

  In the above-described embodiment, the bracket 16 and the reinforcing member 17 are separately assembled to the end plate 15 by caulking and fixed to each other by brazing. However, the present invention is not limited to this. For example, as shown in FIG. 6, a reinforcing member-integrated bracket 18 in which a bracket connecting portion and a reinforcing member are integrally formed may be assembled to the end plate 15. In this case, since the bracket and the reinforcing member can be handled as one component, it is possible to reduce the number of assembling steps.

  In the above embodiment, the brackets 16 are all formed to have the same width dimension. However, the present invention is not limited to this. For example, as shown in FIG. 7, the width dimension W <b> 2 of the bracket 19 near the portion where the stress is concentrated may be formed larger than the width dimension W <b> 1 of the other bracket 16. In this case, by reinforcing the portion of the end plate 15 where the stress is concentrated with the bracket 19 having a large width W2, the amplitude of the end plate 15 that vibrates due to vibration transmission can be reduced.

  Moreover, in the said embodiment, although the bracket 16 which has the connection part 16a of the width dimension same as the width dimension of the latching | locking part 16b was shown, it is not restricted to this. For example, you may use the bracket 20 provided with the connection part 20a with a big width dimension with respect to the latching | locking part 20b.

  In the above embodiment, the bracket 16 and the reinforcing member 17 are assembled to the end plate 15 by caulking or the like. However, the present invention is not limited to this. For example, the bracket 16 and the reinforcing member 17 may be assembled to the end plate 15 by welding such as spot welding or riveting, and fixed to each other by brazing. Therefore, assembling of the bracket 16 and the reinforcing member 17 to the end plate 15 is not limited as long as it can be assembled such as spot welding, riveting, caulking, brazing, or the like.

  In the above embodiment, the reinforcing member 17 is formed in a U-shaped cross section. However, the present invention is not limited to this. For example, it may be formed in the shape of a rectangular column in the same manner as the connection portion 16a of the bracket 16, or may be formed in a cylindrical shape having a quadrangular outer shape.

  Moreover, although the said embodiment showed what fixes the reinforcement member 17 between the extension parts 15b of the end plate 15, it is not restricted to this. For example, as shown in FIG. 9, even if the reinforcing member 17 is disposed outside the extending portion 15b, it is only necessary that the end plate 15 can be reinforced by the reinforcing member 17.

  10 Outdoor Heat Exchanger, 11 Header, 12 Heat Exchange Tube, 14 Heat Transfer Fin, 15 End Plate, 16 Bracket, 16a Connection, 17 Reinforcement Member, 18 Bracket, 19 Bracket, 20 Bracket, 20a Connection, 20b Locking Department.

Claims (3)

A pair of headers extending in parallel with an interval from each other, a plurality of heat exchange tubes each having an end connected to each header and spaced from each other in the direction in which the headers extend, and adjacent heat exchange tubes Heat transfer fins provided on the outside of the heat exchange tube located on both sides in the direction in which the header extends and between the heat transfer fins located on both sides in the direction in which the header extends and in contact with the heat transfer fins An end plate having a base portion and an extending portion extending from the both sides in the width direction of the base portion toward the outer side in the direction in which the header extends and provided on the outer side in the direction in which the header of the end plate extends and used for attachment to other members A heat exchanger comprising a bracket,
It is fixed to the part other than the mounting position of the bracket of the end plate by brazing , and includes a reinforcing member that reinforces the end plate ,
One end of the reinforcing member is connected to the header, and the other end is connected to the bracket . A pair of headers extending in parallel with an interval from each other, a plurality of heat exchange tubes each having an end connected to each header and spaced from each other in the direction in which the headers extend, and adjacent heat exchange tubes Heat transfer fins provided on the outside of the heat exchange tube located on both sides in the direction in which the header extends and between the heat transfer fins located on both sides in the direction in which the header extends and in contact with the heat transfer fins An end plate having a base portion and an extending portion extending from the both sides in the width direction of the base portion toward the outer side in the direction in which the header extends and provided on the outer side in the direction in which the header of the end plate extends and used for attachment to other members A heat exchanger comprising a bracket,
It is fixed to the part other than the mounting position of the bracket of the end plate by brazing, and includes a reinforcing member that reinforces the end plate,
The end plate is provided with a plurality of brackets,
Reinforcing member, the heat exchanger characterized in that both ends are connected to the bracket, respectively. A pair of headers extending in parallel with an interval from each other, a plurality of heat exchange tubes each having an end connected to each header and spaced from each other in the direction in which the headers extend, and adjacent heat exchange tubes Heat transfer fins provided on the outside of the heat exchange tube located on both sides in the direction in which the header extends and between the heat transfer fins located on both sides in the direction in which the header extends and in contact with the heat transfer fins An end plate having a base portion and an extending portion extending from the both sides in the width direction of the base portion toward the outer side in the direction in which the header extends and provided on the outer side in the direction in which the header of the end plate extends and used for attachment to other members A heat exchanger comprising a bracket,
The bracket has a connecting portion with an end plate formed so as to extend in parallel with the extending direction of the end plate, and a reinforcing structure for reinforcing the end plate by fixing the bracket and the end plate by brazing. Provided,
The end plate is provided with a plurality of brackets,
A heat exchanger characterized in that the length dimension of the connecting portion of the bracket close to the position of the center of gravity is made larger than the length dimension of the connecting portion of the other bracket .

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