JP2005053444A - Piping structure of condenser of parallel type heat-exchanger for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a piping structure of a condenser of a parallel type heat-exchanger for a vehicle capable of enhancing the durability of an inlet pipe and an outlet pipe to supply and exhaust a refrigerant to/from the core part of the condenser by relieving the stress caused by vertical direction vibrations without using a costly flexible tube. <P>SOLUTION: The outlet pipe 5 and inlet pipe 6 are composed of connection ends 51 and 61 connected with an output part 21a and an input port 21b, first horizontal parts 52 and 62 folded to ahead of the vehicle from the connection ends 51 and 61 and extending approximately in the horizontal direction to ahead of the vehicle, vibration absorption parts 53 and 63 folded from the first horizontal parts 52 and 62 toward the front face of the condenser core 2 and making U-turn downward along the front face of the condenser core 2, and the second horizontal parts 54 and 64 folded toward the back of the vehicle from the vibration absorption parts 53 and 63 and extending in the horizontal direction toward the back of the vehicle. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a condenser piping structure in a parallel heat exchanger in which a radiator core section and a condenser core section are sub-assembled.

  2. Description of the Related Art Conventionally, a front end structure of an automobile includes left and right side members that form a vehicle body skeleton and a radiator core support that connects the front portions of the left and right side members. The radiator core support includes a rubber insulator, a radiator, and the like. The heat exchanger is fixed. The body of an automobile has several eigenvalues of bending vibration that swings the front end portion up and down, and usually has a large eigenvalue of bending near 25 Hz.

  On the other hand, the secondary rotational vibration of the 4-cylinder engine is 25 Hz at an idle speed of 750 rpm, and particularly in the case of a car with the engine mounted horizontally, the vibration of the engine during idling and the characteristic value of the vehicle body cause resonance. It is known to cause unpleasant vibration called idle vibration that swings the front end up and down.

  In order to reduce this idle vibration, the heat exchanger such as a radiator is set to mass (mass), the mass spring system is assembled using the rubber insulator as a spring, and the eigenvalue is tuned to around 25 Hz, thereby canceling the vibration. There is an example in which a dynamic damper function (a function of attenuating vibrations of a vehicle body excited by vibrations of an engine and reducing vibrations transmitted to a vehicle occupant via the vehicle body) is used.

  Normally, the radiator and the capacitor are mounted separately on the radiator core support. In this case, however, it is necessary to mount them separately, which increases the number of parts and increases the cost, and between the radiator and the capacitor. Since it is necessary to secure a predetermined swinging gap, there is a problem that the entire thickness of the heat exchanger is increased and an extra space is required.

  Therefore, there is a parallel heat exchanger that solves the above problems by elastically supporting the radiator core portion and the capacitor core portion on the vehicle body side in a sub-assembled state (see, for example, Patent Document 1). )

JP 2000-25466 A (page (1) of the specification, FIG. 10)

  However, the inlet pipe and outlet pipe that supply and discharge refrigerant to the condenser core section that vibrates with the radiator core follow the stress that is input when the radiator core that mainly constitutes the mass of the dynamic damper vibrates. For this reason, there is a problem that stress concentrates on the root portion of the capacitor piping to the input / output port, which may cause cracks or breakage.

  The above problems can be solved by using a flexible tube for the inlet pipe and the outlet pipe. However, since the flexible tube is expensive, there is another problem that leads to an increase in cost.

  The problem to be solved by the present invention is that in a parallel heat exchanger in which a radiator core portion and a capacitor core portion are sub-assembled, the stress due to vertical vibration is reduced without using an expensive flexible tube, and the capacitor core An object of the present invention is to provide a condenser piping structure in a parallel heat exchanger for a vehicle that can improve the durability of an inlet pipe and an outlet pipe that supply and discharge a refrigerant to and from the section.

  In order to solve the above-mentioned problem, the condenser piping structure in the parallel heat exchanger for a vehicle according to claim 1 is a parallel heat exchanger in which a radiator core part and a capacitor core part are sub-assembled as a mass. An inlet pipe that supplies and discharges refrigerant to and from the condenser core portion in a parallel heat exchanger for a vehicle that exhibits a dynamic damper function by assembling a mass spring system with a mount that elastically supports the exchanger on the vehicle body side as a spring. The outlet pipe is provided with a vibration absorbing portion that makes a U-turn at least along the plane including the vehicle vertical axis in the vicinity of the parallel heat exchanger.

  The condenser piping structure in the vehicle parallel heat exchanger according to claim 2 is the condenser piping structure in the vehicle parallel heat exchanger according to claim 1, wherein each vibration absorbing portion of the inlet pipe and the outlet pipe is provided. Are provided in a U-turned state along a plane including the vehicle vertical axis and the vehicle width axis, and one end of each vibration absorbing portion extends substantially horizontally from the input / output port of the capacitor core in the vehicle longitudinal direction. Each means is connected to the first horizontal portion, and the other end is connected to a substantially horizontal second horizontal portion extending in the vehicle front-rear direction toward the support portion for the vehicle body side.

  The condenser piping structure in the vehicle parallel heat exchanger according to claim 3 is the condenser piping structure in the vehicle parallel heat exchanger according to claim 1, wherein each vibration absorbing portion of the inlet pipe and the outlet pipe is provided. Are provided in a state of making a U-turn along a plane including the vehicle vertical axis and the vehicle longitudinal axis.

  The condenser piping structure in the vehicle parallel heat exchanger according to claim 4 is the condenser piping structure in the vehicle parallel heat exchanger according to any one of claims 1 to 3, wherein the inlet pipe and A rubber insulator is interposed in each support portion of the outlet pipe with respect to the vehicle body side.

  In the condenser piping structure in the parallel heat exchanger for a vehicle according to claim 1, as described above, the inlet pipe and the outlet pipe for supplying and discharging the refrigerant to and from the condenser core portion include at least the vicinity of the parallel heat exchanger. By adopting a pipe configuration in which a vibration absorbing portion that makes a U-turn along a plane including the vehicle vertical axis is formed, stress caused by vibration in the vertical direction is absorbed and relaxed by the vibration absorbing portion bending in the vertical direction. be able to. Therefore, the durability of the inlet pipe and the outlet pipe that relieve the stress caused by the vertical vibration and supply / discharge the refrigerant to / from the capacitor core portion by simply making a U-turn without using an expensive flexible tube is improved. The effect that it will be able to do is acquired.

In the condenser piping structure in the parallel heat exchanger for a vehicle according to claim 2, as described above, each of the vibration absorbing portions of the inlet pipe and the outlet pipe has a plane including a vehicle vertical direction axis and a vehicle width direction axis, respectively. Provided in a U-turned state, one end of each vibration absorbing portion is connected to a substantially horizontal first horizontal portion extending in the vehicle front-rear direction from the input / output port of the capacitor core, and the other end to the vehicle body side. By adopting a pipe configuration connected to the substantially horizontal second horizontal portion extending in the vehicle front-rear direction toward the support portion, the stress relaxation effect by the vertical vibration is further increased by the amount of bending of the first and second horizontal portions. Can be increased.
Further, the first and second horizontal portions extending in the vehicle front-rear direction bend in the vehicle width direction with the vibration absorbing portion as the center, so that the stress due to vibration in the vehicle width direction can be absorbed and relaxed. Therefore, the durability improvement effect of the inlet pipe and the outlet pipe can be enhanced.

4. The condenser piping structure in the parallel heat exchanger for a vehicle according to claim 3, wherein each of the vibration absorbing portions of the inlet pipe and the outlet pipe makes a U-turn along a plane including a vehicle vertical axis and a vehicle longitudinal axis. By adopting the piping configuration provided in the state, the vibration absorbing portion absorbs and relaxes the stress caused by the vibration in the vertical direction, and further, the vibration absorbing portion twists the stress caused by the vibration in the vehicle width direction. Absorption can be relaxed.
Therefore, the durability improvement effect of the inlet pipe and the outlet pipe can be enhanced.

  5. The condenser piping structure in the parallel heat exchanger for a vehicle according to claim 4, wherein a rubber insulator is interposed in a support portion for the vehicle body side in each of the inlet pipe and the outlet pipe, so that the piping structure as described above. The movement of the inlet pipe and the outlet pipe that has been relaxed can be absorbed by the rubber insulator, whereby the effect of improving the durability of the inlet pipe and the outlet pipe can be further enhanced.

Embodiments of the present invention will be described below with reference to the drawings.
The capacitor piping structure in the parallel heat exchanger for a vehicle according to the embodiment of the invention corresponds to the inventions described in claims 1, 2, and 4.
First, a condenser piping structure in a parallel heat exchanger for a vehicle according to an embodiment of the present invention will be described with reference to the drawings.

  1 is a perspective view showing a condenser piping structure in a parallel heat exchanger for a vehicle according to an embodiment of the present invention, FIG. 2 is a side view thereof, FIG. 3 is a plan view thereof, FIG. 4 is a front view thereof, and FIG. Is an enlarged cross-sectional view of the main part. In these drawings, 1 is a radiator core (heat exchanger), 2 is a condenser core (heat exchanger) for an air conditioner, 3 is a radiator core support (vehicle body side), 4 is Rubber insulator (mount / spring), 5 is an outlet pipe, 6 is an inlet pipe, 7 is a grommet, and 8 is a liquid tank.

  The condenser core 2 is preliminarily fastened (subassembled) to the entire surface of the radiator core 1 to form a parallel heat exchanger A. The parallel heat exchanger A is a radiator core support on the vehicle body side. 3 is elastically supported via a rubber insulator 4.

  More specifically, mounting pins 13 protrude from the upper and lower sides of the left and right radiator tanks 11 and 12 in the parallel heat exchanger A, and the upper left and right mounting pins 13 are not shown in the figure but are shown in the vertical direction. 5 is fixed to the radiator core upper of the radiator core support 3 via a bracket with a free rubber bush fitted on the outside. On the other hand, the lower left and right mounting pins 13 are as shown in the enlarged sectional view of the main part of FIG. In addition, the parallel heat exchanger A is fixed to the vehicle body side by being fixed to the radiator core lower 31 of the radiator core support 3 while being placed via the rubber insulator 4.

  As described above, the mounting structure for the parallel heat exchanger A according to the embodiment of the present invention has the parallel heat exchanger A as a mass, and the parallel heat exchanger A is a radiator core support on the vehicle body side. By forming a mass spring system using two rubber insulators 4 elastically supported by the lower 31 as springs, a dynamic damper function (a function of attenuating engine vibration and reducing vibration transmitted to the vehicle occupant via the vehicle body) is exhibited. It is comprised as follows.

  The outlet pipe 5 and the inlet pipe 6 are pipes that supply and discharge the refrigerant to and from the condenser core 2 part, and support the other end of the input / output pipe connected to the evaporator (not shown) with respect to the radiator core support 3. Piping connected in the range between the output port 21a and the input port 21b provided on the upper side surface of one of the left and right capacitor tanks 21 and 22 (left capacitor tank 21 in the embodiment of the present invention). It constitutes.

  That is, the outlet pipe 5 and the inlet pipe 6 are connected to the output port 21a and the input port 21b, connected to the end portions 51 and 61, bent from the connection end portions 51 and 61 to the front of the vehicle, and substantially horizontal toward the front of the vehicle. First vibration portions 53, 63 that are bent from the first horizontal portions 52, 62 to the front surface side of the capacitor core 2 and U-turn downward along the front surface of the capacitor core 2. The vibration absorbing portions 53 and 63 are configured to bend to the rear of the vehicle and include second horizontal portions 54 and 64 extending horizontally toward the rear of the vehicle.

  And the front-end | tip part of the said 2nd horizontal parts 54 and 64 penetrates the radiator core support 3, and is elastically supported via the grommet 7 which has the rubber insulator function interposed between this radiator core support 3. Yes.

As shown in FIG. 4, the vibration absorbing portions 53 and 63 are formed in a substantially U shape by upper and lower vehicle width direction straight portions 53a, 63a, 53b, and 63b, and vertical direction straight portions 53c and 63c. ing.
Further, the outlet pipe 5 and the inlet pipe 6 are arranged offset from each other so as not to interfere with each other.

Next, operations and effects of the embodiment of the present invention will be described.
In the embodiment of the present invention, as described above, the outlet pipe 5 and the inlet pipe 6 that supply and discharge the refrigerant to and from the condenser core 2 are arranged along the front surface of the condenser core 2 in the vicinity of the parallel heat exchanger A. By adopting a pipe configuration in which the U-turned vibration absorbing portions 53 and 63 are respectively formed, stress due to vibration in the vertical direction can be absorbed and relaxed as the vibration absorbing portions 53 and 63 bend in the vertical direction.

  Further, one end of each of the vibration absorbing portions 53 and 63 is connected to a substantially horizontal first horizontal portion 52 and 62 extending from the output port 21a and the input port 21b of the capacitor core 2 in the vehicle front-rear direction, and the other end is connected. The first and second horizontal portions 52, 62, 54, and 64 are connected to the substantially horizontal second horizontal portions 54 and 64 that extend in the vehicle longitudinal direction toward the support portion for the vehicle body. Therefore, the stress relaxation effect due to the vertical vibration can be further increased by the amount of bending.

  Further, the first and second horizontal portions 52, 62, 54, 64 extending in the vehicle front-rear direction bend in the vehicle width direction around the vibration absorbing portions 53, 63, thereby absorbing stress due to vibration in the vehicle width direction. Can be relaxed.

  Further, the distal end portions of the second horizontal portions 54 and 64 are elastically supported through a grommet 7 having a rubber insulator function that is interposed between the radiator core support 3 and the radiator core support 3. Thus, the movement of the outlet pipe 5 and the inlet pipe 6 that has been relaxed by the piping structure as described above can be further absorbed by the rubber insulator function.

  Therefore, without using an expensive flexible tube, the outlet pipe 5 that relieves the stress caused by the vertical vibration and the vehicle width vibration and supplies and discharges the refrigerant to and from the capacitor core 2 simply by making a U-turn. The effect that the durability of the inlet pipe 6 can be improved is obtained.

Although the embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment of the present invention, and even if there is a design change or the like without departing from the gist of the present invention, the present invention is not limited thereto. included.
For example, in the embodiment of the present invention, the rubber insulator has been described as an example of the mount, but other known mounts such as a fluid mount can be used.

  Further, in the embodiment of the invention, the vibration absorbing portions 53 and 63 are U-turned along the plane including the vehicle vertical direction axis and the vehicle width direction axis. By making a U-turn along, the stress due to vibration in the vertical direction is absorbed and relaxed by the vibration absorbing portions 53 and 63 being bent, and the stress due to vibration in the vehicle width direction is twisted by the vibration absorbing portions 53 and 63. Can be absorbed and relaxed.

  Further, in the embodiment of the invention, the vibration absorbing parts 53 and 63 are formed in a substantially U-shape with the upper and lower vehicle width direction linear parts 53a, 63a, 53b and 63b and the vertical direction linear parts 53c and 63c. Although an example is shown, it may be formed in a U shape having an arc portion.

It is a perspective view which shows the piping structure of the capacitor | condenser in the parallel type heat exchanger for vehicles of embodiment of invention. It is a side view which shows the piping structure of the capacitor | condenser in the parallel type heat exchanger for vehicles of embodiment of invention. It is a top view which shows the piping structure of the capacitor | condenser in the parallel type heat exchanger for vehicles of embodiment of invention. It is a front view which shows the piping structure of the capacitor | condenser in the parallel type heat exchanger for vehicles of embodiment of invention. It is a principal part expanded sectional view which shows the mount part in the parallel type heat exchanger for vehicles of embodiment of invention.

Explanation of symbols

A Parallel heat exchanger 1 Radiator core (heat exchanger)
2 Capacitor core (heat exchanger)
3 Radiator core support (vehicle side)
4 Rubber insulator (mount, spring)
5 Outlet pipe 6 Inlet pipe 7 Grommet (Rubber insulator)
8 Liquid tank 11 Radiator tank 12 Radiator tank 13 Mounting pin 21 Capacitor tank 21a Output input port 21b Input port 22 Capacitor tank 31 Radiator core lower 51 Connection end 52 First horizontal portion 53 Vibration absorbing portion 53a Vehicle width direction linear portion 53b Vehicle Width direction straight part 53c Vertical direction straight part 54 Second horizontal part 61 Connection end 62 First horizontal part 63 Vibration absorbing part 63a Vehicle width direction straight part 63b Vehicle width direction straight part 63c Vertical direction straight part 64 Second horizontal part

Claims (4)

A dynamic damper function is achieved by assembling a mass spring system with a parallel heat exchanger sub-assembled with a radiator core and a condenser core as a mass, and a mass spring system as a spring that elastically supports the parallel heat exchanger on the vehicle body side. In the parallel heat exchanger for vehicles,
The inlet pipe and the outlet pipe that supply and discharge the refrigerant to and from the condenser core portion are each formed with a vibration absorbing portion that makes a U-turn at least along the plane including the vehicle vertical axis in the vicinity of the parallel heat exchanger. The condenser piping structure in the parallel heat exchanger for vehicles characterized by this. 2. The condenser piping structure in the parallel heat exchanger for a vehicle according to claim 1, wherein each of the vibration absorbing portions of the inlet pipe and the outlet pipe has a U-turn along a plane including a vehicle vertical axis and a vehicle width axis, respectively. Provided in a state to
One end of each vibration absorbing portion is connected to a substantially horizontal first horizontal portion extending from the input / output port of the capacitor core in the vehicle front-rear direction, and the other end is directed in the vehicle front-rear direction toward the support portion for the vehicle body side. A condenser piping structure in a parallel heat exchanger for a vehicle, wherein the piping structure is connected to a substantially horizontal second horizontal portion that extends.   2. The condenser piping structure in the parallel heat exchanger for a vehicle according to claim 1, wherein each of the vibration absorbing portions of the inlet pipe and the outlet pipe has a U-turn along a plane including a vehicle vertical axis and a vehicle longitudinal axis, respectively. A condenser piping structure in a parallel heat exchanger for a vehicle, wherein the condenser piping structure is provided in a state where   The condenser pipe structure in the parallel heat exchanger for a vehicle according to any one of claims 1 to 3, wherein a rubber insulator is interposed in a support portion for the vehicle body side in the inlet pipe and the outlet pipe. A condenser piping structure in a parallel heat exchanger for a vehicle.

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