JP2015145197A - Rear cooler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent increase in work hours of the assembly of a rear cooler and cost increase that are caused by applying multiple heat insulation packings.SOLUTION: A rear cooler includes: an evaporator 32 which cools air; an expansion valve 33 which decompresses a refrigerant supplied to the evaporator 32; a case 30 which stores the evaporator 32 and the expansion valve 33, the case 30 having a drain discharge part 30d which drains drain water occurring in the evaporator 32 and the expansion valve 33 to the exterior; and an insulator 31 which is placed continuing from a bottom part of the case 30 that is located below the expansion valve 33 to an area located below the evaporator 32 and guides the drain water to a drain discharge part 30d.

Description

  The present invention relates to a rear cooler.

  For example, in a four-wheeled vehicle having a rear seat, a rear cooler for forming a comfortable space for a passenger sitting in the rear seat may be provided on the ceiling of the vehicle. As shown in Patent Document 1, such a rear cooler includes an evaporator and a case that accommodates the evaporator and the like, and generates conditioned air by cooling the air supplied in the case with the evaporator. Yes.

  In such a rear cooler, a plurality of protrusions are formed on the bottom of the case in order to prevent drain water generated in the evaporator and the expansion valve from swinging inside the case in accordance with the movement of the vehicle. A flow path for guiding drain water is formed.

JP-A-9-290625

  However, the rear cooler is provided with a heat insulating packing for preventing cold from being transmitted to the case. At this time, if the above-described protrusion is formed on the bottom of the case, it is necessary to affix the heat insulating packing while avoiding the protrusion. For this reason, it is necessary to divide the heat insulating packing into small parts in accordance with the protrusions, and to attach the divided small heat insulating packings one by one to the bottom of the case, resulting in an increase in the number of assembling operations and costs. .

  The present invention has been made in view of the above-described problems, and an object of the present invention is to prevent an increase in the number of man-hours and cost for assembling a rear cooler by attaching a plurality of heat insulating packings.

  As means for solving the above problems, the present invention adopts the following configuration.

  1st invention is a rear cooler installed in the ceiling of a vehicle, and contains an evaporator which cools air, an expansion valve which decompresses refrigerant supplied to the evaporator, the evaporator and the expansion valve A case having a drain discharge portion for discharging drain water generated by the evaporator and the expansion valve to the outside; and a bottom portion of the case, and is placed continuously from below the expansion valve to below the evaporator, A configuration is adopted in which an insulator for guiding drain water to the drain discharge portion is provided.

  According to a second invention, in the first invention, the insulator includes a plurality of protrusions that support the evaporator.

  A third invention adopts a configuration in which, in the second invention, the plurality of protrusions form a flow path through which the drain water flows.

  According to a fourth invention, in the second or third invention, the case extends in the vehicle width direction, the drain discharge portion is provided at an end portion in the vehicle width direction, and the protrusion portion is provided in the vehicle width direction. A configuration in which it extends in the width direction is employed.

  According to a fifth aspect, in the fourth aspect, the pair of first protrusions arranged in the vehicle front-rear direction and the side of the first protrusion in the vehicle width direction are the protrusions. A configuration is adopted in which a second protrusion is provided between the first protrusions in the front-rear direction.

  According to a sixth invention, in any one of the first to fifth inventions, the insulator includes a flat surface portion that comes into contact with the evaporator, and an inclined surface portion that descends from the flat surface portion toward the drain discharge portion. Adopting a configuration comprising

  According to this invention, the insulator which consists of a heat insulating material and guides drain water to a drain discharge part is provided. For this reason, the transmission of cold heat to the case can be prevented by installing only one insulator. Therefore, according to the present invention, it is not necessary to affix a plurality of heat insulating packings to the case, and it is possible to prevent an increase in the number of man-hours and an increase in the cost of assembling the rear cooler due to affixing the plurality of heat insulating packings.

It is the perspective view of the rear cooler in one embodiment of the present invention, (a) is the perspective view seen from the back seat side of vehicles, and (b) is the perspective view seen from the front seat side of vehicles. It is the sectional view on the AA line shown to Fig.1 (a) and FIG.1 (b). It is a perspective view of the insulator with which the rear cooler in one embodiment of the present invention is provided. FIG. 4 is a sectional view taken along line BB in FIG. 3.

  Hereinafter, an embodiment of a rear cooler according to the present invention will be described with reference to the drawings. In the following drawings, the scale of each member is appropriately changed in order to make each member a recognizable size.

  FIG. 1 is a perspective view of a rear cooler 1 of the present embodiment, where (a) is a perspective view seen from the rear seat side of the vehicle, and (b) is a perspective view seen from the front seat side of the vehicle. FIG. 2 is a cross-sectional view taken along line AA shown in FIGS. 1 (a) and 1 (b).

  The rear cooler 1 of this embodiment is provided, for example, on the ceiling of a four-wheeled vehicle (vehicle) having a rear seat, and supplies conditioned air whose temperature and humidity are adjusted toward the rear seat. Such a rear cooler 1 of this embodiment is provided with the blower unit 2 and the cooling unit 3, as shown in FIG.1 and FIG.2. In the following description, as shown in FIG. 1, the traveling direction of the vehicle is referred to as the front-rear direction, and the width direction of the vehicle is referred to as the left-right direction.

  The blower unit 2 includes a blower case 20, a fan 21, and a motor 22, and is a so-called sirocco fan. The blower case 20 is formed by fitting two parts divided in the front-rear direction, and a flow path for accommodating the fan 21 and guiding air is formed therein. As shown in FIG. 1B, the blower case 20 is opened in the axial direction of the fan 21, and has an intake port 20 a for taking air into the blower case 20. The blower case 20 has a discharge channel 20 b extending in the tangential direction of the fan 21, and the discharge channel 20 b is connected to the cooling unit 3. Such a blower case 20 functions as a rectifier that rectifies the air pumped from the fan 21.

  The fan 21 is a cylindrical member in which a plurality of blades are arranged in an annular shape when viewed from the axial direction. The fan 21 is rotationally driven about the shaft to pump air taken in from the axial direction in the radial direction. Such a fan 21 is disposed with its axial direction directed in the front-rear direction, and is rotationally driven by a motor 22.

  The motor 22 is fixed to the blower case 20 and is arranged on the rear side of the blower case 20 so that the rotation axis L is directed in the front-rear direction. The motor 22 has an output shaft connected to the fan 21 and rotates the fan 21 based on a command from a control device (not shown).

  In the rear cooler 1 of the present embodiment, the blower unit 2 configured as described above is provided only on the right end portion (one end side) of the cooling unit 3 in the left-right direction (vehicle width direction). ing.

  The cooling unit 3 includes a cooling unit case 30 (case), an insulator 31, an evaporator 32, and an expansion valve 33. The cooling unit case 30 is formed by fitting two parts (upper part 30a and lower part 30b) divided in the vertical direction, and accommodates an insulator 31, an evaporator 32, and an expansion valve 33 therein. In addition, a flow path for guiding air is formed.

  In addition, the said blower unit 2 is being fixed to the cooling unit case 30 when the discharge flow path 20b is pinched | interposed into the upper part 30a and the lower part 30b from the up-down direction. For this reason, the blower unit 2 can be removed from the cooling unit 3 by separating the upper part 30a and the lower part 30b. Thus, in this embodiment, the blower unit 2 and the cooling unit 3 are comprised as another unit, and can be attached or detached.

  The upper part 30a is a lid-shaped part that covers the inner space of the lower part 30b by being attached to the substantially container-shaped lower part 30b opened upward. The lower part 30b has a substantially container shape having a side wall and a bottom part, and includes three outlets 30c opened obliquely downward on the rear side, as shown in FIGS. 1 (a) and 2. Yes. These three outlets 30c are arranged in the left-right direction, and are openings for blowing out conditioned air generated inside the cooling unit case 30 from the cooling unit case 30 as will be described later. Further, as shown in FIG. 1A, the lower part 30b is provided with a drain discharge portion 30d for discharging drain water to the outside.

  FIG. 3 is a perspective view of the insulator 31. 4 is a cross-sectional view taken along line BB in FIG. As shown in FIGS. 3 and 4, the insulator 31 includes a bottom 31a, a side wall 31b provided at an edge of the bottom 31a, and a plurality of protrusions 31d provided on a bottom 31c that is an upper surface of the bottom 31a. And is formed of a heat insulating material. Such an insulator 31 is placed on the lower part 30b (that is, the bottom of the cooling unit case 30).

  The bottom 31a has a shape that is long in the left-right direction, which is the vehicle width direction, and has a size including the evaporator 32 and the expansion valve 33 when viewed from above. That is, the bottom 31 a is continuously provided from below the expansion valve 33 to below the evaporator 32. The bottom 31a is supported by the lower part 30b. A bottom surface 31c that is an upper surface of the bottom portion 31a is provided below a flat surface portion 31e that contacts the evaporator 32 and supports the evaporator 32, inclined surface portions 31f provided on both sides of the flat surface portion 31e in the vehicle width direction, and the expansion valve 33. And a planar connection surface portion 31g.

  As shown in FIG. 4, the plane part 31e is disposed at the highest position in the bottom surface 31c. The inclined surface portion 31f is a portion whose upper end is connected to the flat surface portion 31e and descends toward a later-described through hole 31h (that is, a drain discharge portion 30d). The inclined surface portion 31f is provided with a protruding portion 31d. The connection surface portion 31g is connected to the lower end of one inclined surface portion 31f, and is a portion extending from the lower end of the inclined surface portion 31f to the through hole 31h. This connecting surface portion 31g is also provided with a protruding portion 31d.

  The side wall portion 31b is erected so as to surround the bottom portion 31a, and prevents drain water falling from the evaporator 32 and the expansion valve 33 from leaking from the bottom surface 31c while avoiding the drain discharge portion 30d. A through hole 31h connected to the drain discharge portion 30d is provided at both ends of the side wall portion 31b in the vehicle width direction (that is, the left-right direction). The drain water that has fallen from the evaporator 32 and the expansion valve 33 passes through the through hole 31h and is discharged from the drain discharge portion 30d to the outside of the cooling unit case 30.

  The protrusion 31d is a part that is provided on the bottom surface 31c and protrudes upward. The rear cooler 1 of the present embodiment has four front-rear direction restricting protrusions 31i (first protrusions), two up-down direction restricting protrusions 31j (second protrusions), and one protrusion 31d. And a connecting surface projection 31k.

  The front / rear direction restricting projections 31i are paired with each other, and the two front / rear direction restricting protrusions 31i forming one pair are spaced apart in the vehicle front / rear direction. Each of the front-rear direction restricting projections 31i forming each pair extends in the vehicle width direction, blocks the flow of drain water that attempts to move in the front-rear direction, and guides the drain water in the vehicle width direction. . That is, the front-rear direction restricting protrusion 31i forms a flow path for guiding drain water in the vehicle width direction. The two front-rear direction restricting projections 31i forming such a pair are separated by substantially the same distance as the front-rear direction width of the evaporator 32, and each abuts against the front-rear corner of the evaporator 32. The evaporator 32 is supported, thereby restricting the movement of the evaporator 32 in the front-rear direction. In the present embodiment, a pair of two front / rear direction restricting projections 31i is provided on each inclined surface part 31f, thereby providing a total of four front / rear direction restricting protrusions 31i.

  The up-down direction restricting projection 31j is located on the side of the front-rear direction restricting protrusion 31i in the vehicle width direction and between the front-rear direction restricting protrusion 31i in the front-rear direction. The up-down direction regulating projection 31j is shorter than the front-rear direction regulating projection 31i and extends in the vehicle width direction. Such a vertical regulating protrusion 31j divides the drain water flowing in the vehicle width direction between the two longitudinal regulating protrusions 31i forming one pair in the longitudinal direction. The protrusions 31j for restricting the vertical direction come into contact with the bottom surface of the evaporator 32 to support the evaporator 32 so as to sandwich the upper part 30a, and restrict the movement of the evaporator 32 in the vertical direction. In the present embodiment, the vertical restricting protrusions 31j are respectively provided between the front-rear restricting protrusions 31i and the through-holes 31h forming one pair, so that a total of two vertically restricting protrusions are provided. 31j is provided.

  The connection surface projection 31k is provided on the connection surface 31g and extends in the vehicle width direction. This connection surface projection 31k blocks the flow of drain water about to move in the front-rear direction on the connection surface portion 31g and guides the drain water in the vehicle width direction.

  Returning to FIG. 2, the evaporator 32 is cooled by supplying the refrigerant liquid via the expansion valve 33, and cools the air passing therethrough. The expansion valve 33 is connected to the evaporator 32, and depressurizes and cools the refrigerant liquid supplied from the outside.

  In the rear cooler 1 of this embodiment having such a configuration, when the fan 21 is rotationally driven by the motor 22, air is taken into the blower case 20 from the intake port 20 a and is pumped in the radial direction of the fan 21. . The air pumped by the fan 21 is rectified inside the blower case 20 and supplied to the cooling unit case 30 from the discharge flow path 20b.

  The air supplied to the cooling unit case 30 flows through the cooling unit case 30 and passes through the evaporator 32 to be cooled and dehumidified, and thereby conditioned air. The conditioned air thus generated is blown out from the outlet 30c formed in the lower part 30b.

  Here, as described above, the rear cooler 1 of the present embodiment includes the four front-rear direction restricting protrusions 31 i and the two upper and lower direction restricting protrusions 31 j as the protrusions 31 d. For this reason, the drain water generated in the evaporator 32 and falling on the bottom surface 31c of the insulator 31 is guided in the vehicle width direction by the front-rear direction restricting projection 31i and the inclined surface portion 31f, and is further guided by the up-down direction restricting protrusion 31j. After being diverted in the direction, it is discharged to the outside from the drain discharge portion 30d. Further, the drain water generated by the expansion valve 33 falls to the connection surface portion 31g and is discharged to the outside together with the drain water generated by the evaporator 32 from the drain discharge portion 30d.

  According to the rear cooler 1 of this embodiment as described above, the insulator 31 is provided that is made of a heat insulating material and guides drain water to the drain discharge portion 30d. For this reason, by installing only one insulator 31, the transmission of cold heat to the cooling unit case 30 can be prevented. Therefore, according to the rear cooler 1 of the present embodiment, it is not necessary to affix a plurality of heat insulating packings to the cooling unit case 30, and the number of man-hours and the cost of assembling the rear cooler 1 by affixing a plurality of heat insulating packings are increased. Can be prevented.

  Further, in the rear cooler 1 of the present embodiment, the insulator 31 includes four front-rear direction restricting projections 31 i that support the evaporator 32 and two up-down direction restricting projecting portions 31 j. For this reason, the movement of the evaporator 32 can be regulated by the insulator 31, and it is not necessary to install a member for regulating the movement of the evaporator 32 separately from the insulator 31.

  Further, in the rear cooler 1 of the present embodiment, the four front-rear direction regulating protrusions 31 i form a flow path through which drain water flows. For this reason, it is not necessary to separately form a flow path for guiding drain water with respect to the insulator 31, and the shape of the insulator 31 can be simplified.

  Further, in the rear cooler 1 of the present embodiment, the cooling unit case 30 extends in the vehicle width direction, the drain discharge portion 30d is provided at the end in the vehicle width direction, and the projection 31d extends in the vehicle width direction. Is provided. For this reason, in the insulator 31, it can prevent that drain water rocks | fluctuates in the front-back direction, and can prevent that the water noise by movement of drain water arises.

  Further, in the rear cooler 1 of the present embodiment, two protrusions 3d arranged in the front-rear direction as the protrusions 3d and the side of the front-rear restricting protrusion 31i in the vehicle width direction. And a vertical-direction regulating projection 31j disposed between the longitudinal-direction regulating projections 31i in the longitudinal direction. For this reason, the drain water guided in the vehicle width direction by the front-rear direction restricting protrusion 31 i can be diverted in the front-rear direction by the up-down direction restricting protrusion 31 j, and the drain water is either in the front-rear direction of the insulator 31. Can be prevented. Thereby, since drain water is disperse | distributed in the front-back direction, it can suppress that drain water collects and rocks | fluctuates in the front-back direction, and can prevent that the water noise by movement of drain water arises more. .

  Further, in the rear cooler 1 of the present embodiment, the insulator 31 includes a flat surface portion 31e that contacts the evaporator, and a bottom surface that includes an inclined surface portion 31f that descends from the flat surface portion 31e toward the drain discharge portion 30d and is provided with the protruding portion 31d. 31c. For this reason, while the support surface of the evaporator 32 increases, the rattling of the evaporator 32 can be further prevented and the drain water is smoothly guided to the drain discharge part 30d.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to the said embodiment. Various shapes, combinations, and the like of the constituent members shown in the above-described embodiments are examples, and various modifications can be made based on design requirements and the like without departing from the spirit of the present invention.

  For example, in the above-described embodiment, the protrusion 31d has a configuration including four front-rear direction restricting protrusions 31i, two up-and-down restricting protrusions 31j, and one connection surface protrusion 31k. . However, the present invention is not limited to this, and the number and type of the protrusions 3d are arbitrary.

  Moreover, in the said embodiment, the structure which provides the protrusion part 31d was demonstrated. However, the present invention is not limited to this. For example, it is possible to employ a configuration in which drain water is guided only by the inclined surface portion 31f and the protruding portion 31d is not provided. Furthermore, it is possible to adopt a configuration in which a groove portion is provided instead of the protruding portion 31d to guide the drain water.

  DESCRIPTION OF SYMBOLS 1 ... Rear cooler, 2 ... Blower unit, 3 ... Cooling unit, 3d ... Projection part, 20 ... Blower case, 20a ... Intake port, 20b ... Discharge flow path, 21 ... Fan, 22 ... ... Motor, 30 ... Cooling unit case (case), 30a ... Upper part, 30b ... Lower part, 30c ... Outlet, 30d ... Drain discharge part, 31 ... Insulator, 31a ... Bottom part, 31b ...... Side wall part, 31c ....... Bottom surface, 31d .... Protrusion part, 31e..Plain part, 31f .... Inclined surface part, 31g .... Connecting surface part, 31h .... Through hole, 31i. 1st protrusion), 31j .. Vertical-direction restricting protrusion (second protrusion), 31k .. Connection surface protrusion, 32..Evaporator, 33 .. Expansion valve, L .. Rotating shaft

Claims (6)

A rear cooler installed on the ceiling of the vehicle,
An evaporator for cooling the air;
An expansion valve that depressurizes the refrigerant supplied to the evaporator;
A case having a drain discharge portion for containing the evaporator and the expansion valve and discharging drain water generated by the evaporator and the expansion valve to the outside;
A rear cooler, comprising: an insulator which is placed at a bottom of the case and continuously below the expansion valve and below the evaporator and guides the drain water to the drain discharge portion.   The rear cooler according to claim 1, wherein the insulator includes a plurality of protrusions that support the evaporator.   The rear cooler according to claim 2, wherein the plurality of protrusions form a flow path through which the drain water flows. The case extends in the vehicle width direction and the drain discharge portion is provided at an end in the vehicle width direction.
The rear cooler according to claim 2, wherein the protrusion is provided so as to extend in the vehicle width direction. As the protrusion,
A pair of first protrusions arranged in the vehicle longitudinal direction;
The rear cooler according to claim 4, further comprising: a second protrusion that is lateral to the first protrusion in the vehicle width direction and is disposed between the first protrusions in the front-rear direction. .   The said insulator is provided with the bottom face which has a plane part contact | abutted to the said evaporator, and an inclined surface part which goes down from the said plane part toward the said drain discharge part, The Claim 1 characterized by the above-mentioned. Rear cooler.

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