JP4034049B2 - Air conditioner for vehicles - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicle air conditioner.
[0002]
[Prior art]
Recently, a vehicle air conditioner called an integrated air conditioner has been widely used due to a demand for compactness. As shown in FIG. 14, the vehicle air conditioner is entirely supported by a member M provided on an upper portion of a floor panel FP of a dash panel DP that partitions a vehicle compartment R and an engine room E, and various devices are provided. An air path F is provided in the compact unit case 10 incorporated.
[0003]
The air passage F communicates with the scroll chamber 12 and is a descending passage F1 through which the air blown from the blower fan 11 descends and flows, an ascending passage F3 through which the air passing through the descending passage F1 flows up, and the descending passage F1. And a lateral passage F2 communicating with the ascending passage F3, and is formed in a substantially U shape as a whole.
[0004]
In this air path F, the centrifugal multiblade fan 11 at the upper front, the evaporator 13 provided in the downstream portion of the descending passage F1, the drainage portion 15 provided in the bottom surface of the lateral passage F2, and the evaporator 13 Heater core 17 provided through partition wall 10f in the upper part, mix door 18, foot door 19 and vent / control for air distribution control to warm air passage F4 on the side of heater core 17 of ascending passage F3 and bypass passage F5 on the side thereof Various door portions D including the differential door 20 are provided.
[0005]
The air taken in by the multiblade fan 11 is directed downward by the fan scroll 12, cooled by exchanging heat with the refrigerant circulating in the evaporator 13, and U-turned upward by the lateral passage F2 at the bottom. Directed to the hot air passage F4 and the bypass passage F5 by the mix door 18 or not branched, and selectively from the differential air outlet 22, the vent air outlet 23, and the foot air outlet 24 by the control of the door portion D. It is blown into the passenger compartment R.
[0006]
[Problems to be solved by the invention]
However, in such a vehicle air conditioner, the direction of the air blowing to the evaporator 13 is set from the upper side to the lower side, that is, because the evaporator 13 is disposed sideways, the condensed water condensed on the surface of the evaporator 13 is There is a risk of dropping from the evaporator 13 as it is and blowing into the passenger compartment by blowing air. Further, when a large amount of condensed water is retained, there is a possibility that the refrigerating capacity of the evaporator 13 is reduced.
[0007]
The present invention has been made to solve the problems associated with the above-described prior art, and an object thereof is to provide a vehicle air conditioner that can enhance the drainage of condensed water.
[0008]
[Means for Solving the Problems]
In the first aspect of the invention, in the vehicle air conditioner in which the direction of the air blowing to the evaporator is set from the upper side to the lower side, and a drainage portion is provided at the bottom of the unit case in the downstream of the evaporator. The evaporator is disposed substantially horizontally along the longitudinal direction of the refrigerant tube of the evaporator, and the evaporator is held on the side wall of the unit case at the longitudinal end of the refrigerant tube of the evaporator, A wind-shielding portion that blocks ventilation to the core portion of the evaporator is provided upstream of ventilation at the longitudinal end portion of the refrigerant tube of the evaporator.
[0009]
The invention according to claim 2 is the vehicle air conditioner according to claim 1, wherein the evaporator is orthogonal to the longitudinal direction of the refrigerant tube of the evaporator. Towards the stacking direction of the refrigerant tubes (30) It is characterized by being inclined with respect to a horizontal plane.
[0010]
The invention according to claim 3 is the vehicle air conditioner according to claims 1 and 2, wherein the evaporator is a type including a tank for distributing the refrigerant to both ends in the longitudinal direction of the refrigerant tube. The evaporator is held in the unit case at the tank portion of the evaporator.
[0011]
According to a fourth aspect of the present invention, in the vehicle air conditioner according to the first or second aspect, the evaporator includes a tank that distributes the refrigerant to one of the longitudinal ends of the refrigerant tube. This evaporator is characterized in that the evaporator is held in the unit case at the tank portion of the evaporator.
[0012]
According to a fifth aspect of the present invention, in the vehicle air conditioner according to any one of the first to fourth aspects, the air passage is arranged such that the air that has passed downward through the evaporator is deflected upward. It is characterized by being comprised.
[0013]
In invention of Claim 6, it is a vehicle air conditioner of any one of Claims 1-5, Comprising: The drainage of the condensed water from this evaporator in the part which hold | maintained the evaporator of a unit case A path is formed.
[0014]
According to a seventh aspect of the present invention, in the vehicle air conditioner according to the sixth aspect of the present invention, the drainage channel includes a receiving portion that receives condensed water that flows down from a lower side edge of the evaporator, and the receiving portion. And a guide part that guides the condensed water from the part along the inner surface of the unit case.
[0015]
In invention of Claim 8, it is an air conditioning apparatus for vehicles of Claim 7, Comprising: The evaporator is inclined with respect to the horizontal plane in the stacking direction of the refrigerant tubes perpendicular to the longitudinal direction of the refrigerant tubes of the evaporator and along the evaporators Part holding the evaporator With an inclined structure The guide portion is provided in a predetermined range in the vicinity of the inclined lower end of the receiving portion.
[0016]
The invention according to claim 9 is the vehicle air conditioner according to claim 8, wherein the evaporator is formed by laminating a number of flat refrigerant tubes each provided with a bowl-shaped portion for receiving condensed water at a lower end. It is a laminated type, and at least one end portion of the bowl-shaped portion is disposed on the drainage channel.
[0017]
【The invention's effect】
According to the first aspect of the present invention, the wind blocking portion that blocks the ventilation to the core portion of the evaporator is provided upstream of the ventilation of the longitudinal end portion of the refrigerant tube of the evaporator. Therefore, the condensed water condensed on the evaporator along the refrigerant tube is guided toward the longitudinal end of the refrigerant tube by the windshield portion. For this reason, the portion with poor drainage is eliminated by the guide of the condensed water by the windshield portion, and a decrease in the refrigerating capacity of the evaporator can be prevented.
[0018]
According to the invention described in claim 2, in addition to the effect of the invention described in claim 1, the direction in which the evaporator is orthogonal to the longitudinal direction of the refrigerant tube of the evaporator Toward the stacking direction of the refrigerant tubes Since it is inclined with respect to the horizontal plane, the unit case can be made compact by the inclined arrangement of the evaporator.
[0019]
According to the invention described in claim 3, in addition to the effects of the inventions described in claims 1 and 2, the evaporator is of a type provided with a tank for distributing the refrigerant to both ends in the longitudinal direction of the refrigerant tube. Since the tank part of the evaporator is held in the unit case, the occupation ratio in the air passage of the tanks arranged at both ends in the longitudinal direction of the refrigerant tube can be reduced, so that the passage performance can be improved and the noise can be reduced. Can do.
[0020]
According to the invention described in claim 4, in addition to the effects of the invention described in claims 1 and 2, the evaporator is a type including a tank that distributes the refrigerant to one of the longitudinal ends of the refrigerant tube. Since the evaporator is held in the unit case at the tank portion of the evaporator, the occupation rate in the air passage of the tank disposed at the end in the longitudinal direction of the refrigerant tube can be reduced, so that the passage performance can be improved and low. Noise can be reduced.
[0021]
According to the invention described in claim 5, in addition to the effect of the invention described in any one of claims 1 to 4, the air path is configured so that the air passing downward through the evaporator is deflected upward. Therefore, it becomes possible to set a drainage part in the lowest part of a unit case, and it can improve drainage.
[0022]
According to the invention described in claim 6, in addition to the effect of the invention described in any one of claims 1 to 5, the drainage channel of the condensed water from the evaporator is formed in the portion of the unit case holding the evaporator. Therefore, since the condensed water from the evaporator can be received by the drainage channel at the portion holding the evaporator and can flow down along the inner surface of the unit case, the drainage can be further improved.
[0023]
According to the invention described in claim 7, in addition to the effect of the invention described in claim 6, the drainage channel includes a receiving portion that receives condensed water flowing down from the lower side edge of the evaporator, and condensed water from the receiving portion. And a guide part that guides the flow down along the inner surface of the unit case, so that the condensed water from the evaporator can be reliably captured by the receiving part and guided along the side wall by the guide part. It can be further increased.
[0024]
According to the invention described in claim 8, in addition to the effect of the invention described in claim 7, since the guide portion is provided in a predetermined range near the inclined lower end of the receiving portion, the condensation captured by the receiving portion. Since water is guided along the inner surface of the unit case by the guide portion while the water reaches the inclined lower end of the receiving portion, it is possible to prevent the condensed water from collecting at the inclined lower end.
[0025]
According to the ninth aspect of the invention, in addition to the effect of the eighth aspect of the invention, the evaporator is a laminated type in which a number of flat refrigerant tubes each having a bowl-shaped portion for receiving condensed water at the lower end are laminated. Since at least one end of the bowl-shaped portion is disposed on the drainage channel, the condensed water can be captured by the bowl-shaped portion at the lower end of the refrigerant tube, and the condensed water is directed from the lower surface of the evaporator to the drainage channel without flying off. Since the flow guide can be surely performed, the flying prevention effect can be further enhanced.
[0026]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0027]
1st Embodiment: 1st Embodiment is described based on FIGS. 1-8 below. 1 is a schematic cross-sectional view of a vehicle air conditioner according to this embodiment, FIG. 2 is a front view including a partial cross-section of the vehicle air conditioner, and FIG. 3 is an evaporator of a unit case in the same embodiment. 4 is a side view of the evaporator in the same embodiment, FIG. 5 is a plan view of FIG. 4, FIG. 6 is a schematic diagram for explaining the refrigerant circulation path of the evaporator in the embodiment, and FIG. It is sectional drawing which follows the SA-SA line in FIG. 1 which shows the structure of the windshield part in embodiment. This embodiment is an integrated vehicle air conditioner as shown in FIG. 1, but the basic structure is the same as the apparatus shown in FIG. Omitted.
[0028]
A unit case 10 of the vehicle air conditioner is formed by combining two divided cases 10A and 10B, and a scroll chamber 12 in which a blower fan 11 is housed, and a blower fan 11 communicating with the scroll chamber 12. A defroster outlet 22, a vent outlet 23 and a foot outlet 24, and an intake unit (not shown) in the scroll chamber 12. And an intake port (not shown) that selectively takes in the inside and outside air is opened.
[0029]
In the vehicle air conditioner of this embodiment, the air passage F communicates with the scroll chamber 12 and the air flow from the blower fan 11 descends and flows down, and the air that has passed through the down passage F1 rises. A so-called U-shaped air blower type vehicle air conditioner having a generally upward U-shape that has a rising passage F3 that flows through and a lateral passage F2 that communicates with the lowering passage F1 and the rising passage F3. is there.
[0030]
An evaporator 13 for cooling the air blown downward from the blower fan 11 is disposed downstream of the descending passage F1, and deflected wall portions 25 and 26 in which the air cooled and dehumidified by the evaporator 13 is curved. It flows to the ascending passage F3 through the lateral passage F2 having
[0031]
In the ascending passage F3, a part of the ascending passage F3 is divided into front and rear, and a hot air passage F3 in which the heater core 17 is arranged and a bypass passage F4 that bypasses the heater core 17 are formed.
[0032]
Here, the outer edge of the unit case 10 includes a front wall 10b disposed on the engine room side, a rear wall 10c disposed on the seat space side in the vehicle interior, a downward passage F1, a lateral passage F2, and an upward passage F3. It consists of a pair of left and right side walls 10a, 10a that are oriented, a bottom wall 10d that forms a lateral passage F2 between the evaporator 13, and a top wall 10e that opens the defroster outlet 22 and vent outlet 23, It is defined as space and external space.
[0033]
Further, the unit case 10 includes a partition wall 10f that divides the descending passage F1 and the ascending passage F3 therein. As shown in FIG. 1, the partition wall 10f has a concave portion formed in a substantially concave shape from the descending passage F1 side to the ascending passage F3 side. The heater core 17 is disposed on the rising passage F3 side of the concave portion of the partition wall 10f to form a hot air passage F4, while the evaporator 13 is disposed on the lower portion of the concave portion of the partition wall 10f on the lowering passage F1 side. The heater core 17 and the evaporator 13 are disposed above and below the partition wall 10f. By arranging the heater core 13 in the concave portion of the inner wall portion 10f in this way, the bypass passage F5 and the vent outlet 23 are formed substantially linearly along the front wall 10c of the unit case 10, and in the full cool mode. It has a structure that can maximize the refrigerating capacity.
[0034]
The heater core 17 slightly protrudes rearward from the rear end surface of the evaporator 13, and a rotating shaft 18 a of a swing type mix door 18 is disposed below the rear end of the heater core 17. The mix door 18 rotates around the rotary shaft 18a between the inlet 28 of the hot air passage F4 and the inlet 29 of the bypass passage F5 to control the air distribution ratio between the hot air passage F4 and the bypass passage F5. ing. In this embodiment, a rectifying unit 27 that rectifies the air blown by the deflecting wall 26 is provided at the lower end of the partition wall 10f of the unit case 10, and the protruding end 27a of the rectifying unit 27 is connected to the mix door. 18 is the open base end of the warm air passage F4.
[0035]
Now, in the vehicle air conditioner having such a basic structure, since the drainage structure is characteristic in this embodiment, the drainage structure will be described in detail below.
[0036]
First, the structure of the evaporator 13 will be described. The evaporator 13 is a laminated evaporator 13 as shown in FIGS. 4 and 5, and includes a core portion 13 </ b> A configured by laminating a large number of flat refrigerant tubes 30 via corrugated heat transfer fins 31. Each of the refrigerant tubes 30 includes two tanks 32a and 32b communicating with the refrigerant tubes 30 and tanks 33a and 33b at both ends. The refrigerant tube 30F disposed in the front half portion 13F of the evaporator 13 forms a U-shaped passage communicating with the tanks 33a and 33b by the partition wall 34a, while being disposed in the rear half portion 13R of the evaporator 13. The refrigerant tube 30R is formed by being divided into two by a partition wall 34b, a passage communicating the tank 32a and the tank 33a and a passage communicating the tank 32a and the tank 33a. In the evaporator 13 having such a configuration, the low-temperature refrigerant flowing from the inlet pipe 35 connected to the expansion valve EV is, as shown in FIG. 6, the tank 32a → second-half tube 30R → tank 33a → first-half refrigerant tube 30F. → The tank 33b → the second half refrigerant tube 30R → the tank 32b → the outlet pipe 36, meandering and flowing.
[0037]
As shown in FIG. 1, the evaporator 13 is inclined downward (in this embodiment) from the descending passage F1 side to the ascending passage F3 side (toward the vehicle rear) by the pair of both side walls 10a, 10a. (Tilt angle θ = 19 °). The longitudinal direction of the refrigerant tube 30 of the evaporator 13 is orthogonal to the inclination direction of the evaporator 30. In other words, the evaporator 13 is configured such that the longitudinal direction of the refrigerant tube 30 is orthogonal to the pair of left and right side walls 10a, 10a facing the unit case 10, and tanks 32a, 32b, 33a, 33b is held (see FIGS. 1 to 3).
[0038]
In short, the longitudinal direction of the refrigerant tube 30 of the evaporator 13 intersects with the inclination direction of the evaporator 13, and the condensed water is prevented from collecting at the inclined lower end portion of the evaporator 13. .
[0039]
Here, in this embodiment, although the evaporator 13 does not incline toward the longitudinal direction of the refrigerant tube 30, as shown in FIG. 7, the longitudinal end of the refrigerant tube 30 held by the side wall 10 a of the unit case 10. A wind-shielding portion 51 is provided upstream of the ventilation portion to block the ventilation of the evaporator 13 to the core portion 13A. The windshield 51 protrudes from the unit case 10 to the inside of the descending passage F1, and reduces the ventilation dynamic pressure at the longitudinal end of the refrigerant tube 30 of the evaporator 13 to condense the condensed water on the evaporator 13. Is guided from the central portion in the longitudinal direction of the refrigerant tube 30 of the evaporator 13 to the end portion due to the difference in the ventilation dynamic pressure. Unit case 10 is caused to flow down to the bottom portion of the unit case 10 through the side wall 10a and finally drain from the drainage portion 15 of the bottom portion. As shown in FIG. 3, the windbreak portion 51 of this embodiment is provided so as to extend over the entire width of the core portion 13 </ b> A of the evaporator 13 along the tank 32 (33) of the evaporator 13. Yes.
[0040]
Further, in the vehicle air conditioner of this embodiment, the drainage structure is devised in the shape of the refrigerant tube 30 and the shape of the side wall 10a of the unit case 10, and the following will be further added.
[0041]
At the lower end of each refrigerant tube 30, as shown in FIG. 4, a bowl-shaped portion T is formed by curling and molding the plate end portion constituting each refrigerant tube 30 so as to be orthogonal to the air flow direction. Therefore, the condensed water W condensed on the surface of each refrigerant tube 30 is pushed by the air flow and flows to the lower end and is captured by the bowl-shaped portion T. The condensed water W captured here is pushed by the dynamic pressure of the air flow. Thus, the shape is easy to flow toward the pair of left and right side walls 10a and 10a along the longitudinal direction of the bowl-shaped portion T.
[0042]
Further, the unit case 10 is formed with drainage channels 40 on both side walls 10a and 10a as shown in FIG. The drainage channel 40 is formed by using a recess formed as a holding portion of the evaporator 13 on the side wall 10a of the unit case 10, and is constituted by a lower edge shoulder portion of the recess to receive condensed water. A portion 40a (see FIG. 3 and FIG. 7), a guide portion 40b formed by cutting out a part of the receiving portion 40, and allowing the condensed water received by the receiving portion 40a to flow down along the side wall 10a; It is comprised from. The guide portion 40b is formed by providing a groove having a predetermined width for smoothly communicating the receiving portion 40a and the side wall 10a at a position slightly above (frontward) the lower end of the slope. The condensed water W on 40a flows smoothly along the side wall 10a.
[0043]
Further, as shown in FIG. 7, downstream of the evaporator 13, the opposing side wall 10 a of the unit case 10 has an inner surface formed wider than the core portion 13 of the evaporator 13, and the unit case 10 downstream of the evaporator 13. The structure is such that the wind does not easily hit the inner surface of the side wall 10a. In other words, the wind stronger against the condensed water flowing down the side wall 10a by the tanks 32a, 32b and 33a, 33b protruding inward of the air path F (F1) than the inner surface of the side wall 10a of the unit case 10 downstream of the evaporator 13. In this structure, the condensed water is difficult to fly.
[0044]
Further, the boundary portion B between the receiving portion 40a and the inner surface of the side wall 10a is preferably at least chamfered. In this embodiment, the boundary portion B is formed in a smooth curved shape, and is condensed by the surface tension generated at the edge portion. Preventing the water from becoming granular and taking further measures to prevent flying.
[0045]
Furthermore, the heat insulating material G (refer FIG. 3) which covers the perimeter of the outer surface of the evaporator 13 is also devised. In FIGS. 1 and 2, the heat insulating material G is omitted. The heat insulating material G functions as a cushioning material that absorbs vibration generated when the refrigerant flows through the evaporator 13 in addition to the function of preventing the evaporator 13 from exchanging heat with the air other than the air in the air path F as much as possible. In general, this heat insulating material G is generally provided up to the vicinity of the air flow surface (upper and lower surfaces) of the evaporator 13. However, in this embodiment, from the position that should be provided to the vicinity of the air flow surface (upper and lower surfaces) as described above, the lower end of the portion that first contacts the side wall 10a of the unit case recedes as shown in FIG. The volume of the receiving portion 40a of the drainage channel 40 is enlarged.
[0046]
Further, the lower end of the evaporator 13 of the heat insulating material G is provided at a position higher than the lower edge of the evaporator 13. This point will be further described. The rear surface of the stacked evaporator 13 is the outer surface of the stacked outermost refrigerant tubes 30 and is less affected by the air flow, and the condensed condensed water is difficult to move by the air flow. Since it is a part, once condensed water is generated, it becomes large and may concentrate and fall to a part. Accordingly, the rear surface does not cover the entire surface with the heat insulating material G, and the lower end of the heat insulating material G is shortened to prevent the growth of condensed water at the lower end of the heat insulating material G, thereby contributing to the prevention of flying water.
[0047]
The main action of the vehicle air conditioner thus configured will be described.
[0048]
For example, when the vehicle air conditioner is set to the vent mode, as shown in FIG. 1, the refrigerant is circulated through the evaporator 1, the blower fan 11 is operated, and the mix door 18 is located at the position where the warm air passage F4 is fully opened. The differential door 20 is set to a position where the vent outlet 23 is fully opened, and the foot door 19 is set to a position where the foot outlet 24 is fully closed.
[0049]
The air flow sent into the air path F by the blower fan 11 is cooled in the evaporator 13 in the downstream portion of the descending passage F1, and then blown out from the vent outlet 23 via the lateral passage F2 and the bypass passage F4. The
[0050]
During this cooling, the evaporator 13 is cooled when the air flow passes through the core portion 13A composed of the refrigerant tubes 30 and the heat transfer fins 31, moisture in the air is condensed and attached to each refrigerant tube 30 to form dew, This gradually grows to produce condensed water.
[0051]
Here, in this embodiment, the wind-blocking portion 51 that blocks the ventilation to the core portion 13A of the evaporator 13 is provided upstream of the ventilation in the longitudinal direction end portion of the refrigerant tube 30 of the evaporator 13. The condensate condensed on the evaporator 13 is always guided from the longitudinal central portion of the refrigerant tube 30 toward the longitudinal end by the windshield portion 51 without inclining the evaporator 13. For this reason, the windshield portion 51 always guides and drains the condensed water to the end portion of the evaporator 13 without stopping the condensed water on the lower surface of the evaporator 13. It is possible to prevent the refrigeration capacity of the evaporator 13 from being lowered due to the water retention. In other words, if there is a part where the condensed water is constantly retained, it causes the flying water and interrupts the flow of the air flow and reduces the refrigeration capacity of the evaporator 13, but according to this embodiment, The water retaining portion can be eliminated by the windshield portion 51 and the performance of the evaporator 13 can be prevented from being deteriorated.
[0052]
In particular, in this embodiment, the windshield 51 extends along the tank 32 (33) of the evaporator 13 over the entire width of the core 13A of the evaporator 13 as shown in FIG. Therefore, a water retention region does not occur on the entire surface of the evaporator 13, and the refrigeration capacity of the evaporator 13 can be utilized to the maximum.
[0053]
In this embodiment, as shown in FIG. 3, the windbreak portion 51 is provided so as to extend over the entire width of the core portion 13 </ b> A of the evaporator 13 along the tank 32 (33) of the evaporator 13. However, the windshield portion 51 is not necessarily provided over the entire width, and only a part of the windshield portion 51 may be provided in a portion that is difficult to drain. Further, even when the windshield portion 51 is provided to the full width as shown in FIG. 3, the amount of protrusion of the windshield portion 51 is increased particularly in the vicinity of the refrigerant tube 30 in a portion with poor drainage. The shape may be taken to improve drainage.
[0054]
Further, according to this embodiment, the evaporator 13 has the end portion in the longitudinal direction of the refrigerant tube 30 of the evaporator 13 held by the inner surface of the side wall 10a of the unit case 10, and the ventilation portion of the evaporator 13 is upstream of the held portion. Since the windshield portion 51 that blocks ventilation to the core portion 13A is provided, the condensed water guided toward the longitudinal end portion of the refrigerant tube 30 by the windshield portion 51 remains on the inner surface of the side wall 10a of the unit case 10 as it is. To flow smoothly through. In other words, the condensed water is not in the form of particles that are easily blown off by the air flow, but is drawn along the inner surface of the side wall 10a of the unit case 10 while being stretched in the plane direction on the inner surface of the side wall 10a of the unit case 10. Water can be efficiently drained without being blown away, and flying water can be reliably suppressed.
[0055]
Further, according to this embodiment, the evaporator 13 is inclined with respect to the horizontal plane in a direction orthogonal to the longitudinal direction of the refrigerant tube 30 of the evaporator 13, so that the unit case 10 is mounted by the inclined arrangement of the evaporator 10. It can be made compact.
[0056]
Further, according to this embodiment, the evaporator 13 is held on the both side walls 10a and 10a of the unit case 10 in the tanks 32a and 32b and the tanks 33a and 33b that distribute the refrigerant to both longitudinal ends of the refrigerant tube 30. Therefore, the tanks 32a, 32b and 33a, 33b can be accommodated and held in the left and right side walls 10a only by partially widening the unit case 10 in the vehicle width direction that does not significantly affect the living space of the passenger compartment. The occupied area in the air path F of the tanks 32a, 32b and 33a, 33b can be reduced, and the ventilation performance can be improved. It also contributes to low noise.
[0057]
Moreover, according to this embodiment, since the air path F is comprised so that the air which passed the evaporator 13 downward may be deflected upwards, the drainage part 15 is set in the lowest part of the unit case 10 It is possible to improve drainage.
[0058]
Further, according to this embodiment, since the drainage 40 of the condensed water from the evaporator 10 is formed in the portion of the unit case 10 that holds the evaporator 13, the condensation from the evaporator 13 is performed by the drainage 40. Since the condensed water can flow down along the inner surface of the side wall 10a of the unit case 10 by receiving water, the drainage performance is further improved.
[0059]
Moreover, according to this embodiment, the drainage 40 receives the condensed water that flows down from the lower side edge of the evaporator 13, and the condensed water from the receiving part 40 a flows along the inner surface of the side wall 10 a of the unit case 10. The condensate from the evaporator 13 can be reliably captured by the receiving portion 40a and guided along the side wall 10a by the guide portion 40b, thereby further improving the drainage effect. Can be increased.
[0060]
In addition, according to this embodiment, since the guide portion 40b is provided in the vicinity of the inclined lower end of the receiving portion 40a, the condensed water captured by the receiving portion 40a is inclined to the receiving portion 40a. Guided by the guide portion 40b along the inner surface of the side wall 10a of the unit case 10 while reaching the lower end, it is possible to avoid the condensed water collecting at the inclined lower end.
[0061]
Further, according to this embodiment, the evaporator 13 is a laminated type in which a plurality of flat refrigerant tubes 30 provided with a bowl-shaped portion T for receiving condensed water at the lower end are laminated, and at least one end of the bowl-shaped portion T Since the portion is arranged on the drainage channel 40, the condensed water can be captured by the bowl-shaped portion T at the lower end of the refrigerant tube 30, and it is reliably directed toward the drainage channel 40 without flying the condensed water from the lower surface of the evaporator 13. The flow guide can be provided, and the flying water prevention effect can be further enhanced. The hook-shaped portion T is preferably formed over the entire width of the refrigerant tube 30, but even if the structure is interrupted in the middle, it passes through the interrupted portion to the longitudinal end of the refrigerant tube 30. It is possible to drain the condensed water.
[0062]
In this embodiment, the evaporator 13 is inclined downward from the descending passage F1 side toward the ascending passage F3. However, as a matter of course, the evaporator 13 is disposed from the descending passage F1 side to the ascending passage as shown in FIG. As shown in FIG. 9, the evaporator 13 may have a structure in which the evaporator 13 is inclined upward from the descending passage F1 toward the ascending passage F3, as shown in FIG. As shown in FIG. 9, also in the vehicle air conditioner, the same effect as the first embodiment can be obtained.
[0063]
That is, the meaning of the present invention is that even in the vehicle air conditioner in which the evaporator 13 is configured substantially horizontally along the longitudinal direction of the refrigerant tube 30 of the evaporator 13, The condensed water is guided along the refrigerant tube 30 to the longitudinal end portion of the refrigerant tube 30 to effectively drain the condensed water. Further, as shown in FIG. 13, the technical idea of the present invention is that the evaporator 60 is inclined along the longitudinal direction of the refrigerant tube 63 so that the portion held by the unit case 10 of the evaporator 60 is the inclined lower end. This structure is also applicable, and it has been proved that the windshield 56 works effectively particularly when the inclination angle θ with respect to the horizontal plane is 15 ° or less. In such a case, the windbreak portion 56 and the inclination angle θ of the evaporator 60 along the longitudinal direction of the refrigerant tube 63 combine to further improve drainage.
[0064]
Moreover, this invention is not limited to such 1st Embodiment, Hereinafter, the other form of a windshield part is demonstrated. Note that in the following embodiments, the same reference numerals are given to the same structures as those in the first embodiment, and description thereof will be omitted.
[0065]
Second Embodiment: FIG. 10 is a schematic sectional view showing the main part of a second embodiment of the present invention. As shown in FIG. 10, the second embodiment is an example in which the windshield portion 52 is formed of a heat insulating material G that serves as the evaporator 13. Also in this embodiment, the windshield portion 52 protrudes upstream of the core portion 13A of the evaporator 13 and lowers the ventilation dynamic pressure at the side end portion of the core portion 13A. Even if 52 is formed, the same effect as the first embodiment can be obtained.
[0066]
Third Embodiment: FIG. 11 is a schematic cross-sectional view showing the main part of a second embodiment of the present invention. As shown in FIG. 11, the second embodiment is an example in which the windshield portion 53 is formed so that the side wall 10a of the unit case 10 upstream of the evaporator 13 is thick toward the inside of the descending passage F1. Even in such a configuration, the same effect as the first and second embodiments can be obtained. In the third embodiment, the airflow flowing through the air passage F is different from the shape in which the windshield portions 51 and 52 project inward of the air passage F (downward passage F1) as in the first and second embodiments. Therefore, compared to the windshield portions 51 and 52 of the first and second embodiments, there is an advantage that noise is less likely to occur and ventilation resistance is reduced. Further, from this point of view, it is more preferable that the windbreak portion 53 has a shape that is reduced in width toward the air flow direction, such as a tapered cross section.
[0067]
Fourth Embodiment: FIG. 12 is a schematic sectional view showing the main part of a fourth embodiment of the present invention. In the fourth embodiment, the evaporator 60 is different from the first to third embodiments in that the tanks 61 and 62 are provided only on one of the longitudinal ends of the refrigerant tube 30. In this example, The windshield 57 is provided on the longitudinal end side of the refrigerant tube 30 having the tanks 61 and 62, while the longitudinal end side of the refrigerant tube 30 opposite to the tanks 61 and 62 is A windshield 58 is provided. Here, both the windshield portion 57 and the windshield portion 58 are formed so as to cover the core portion 60A of the evaporator 60, and in this embodiment, the same function and effect as in the first to third embodiments can be obtained. .
[0068]
In short, according to the first to fourth embodiments, since the wind-blocking portion 51 that blocks the ventilation to the core portion 13A of the evaporator 13 is provided upstream of the ventilation of the longitudinal end portion of the refrigerant tube 30 of the evaporator 13, the wind Due to the difference in ventilation dynamic pressure generated by the stop portion 51, the condensed water condensed on the evaporator 13 can be smoothly guided from the longitudinal center portion of the refrigerant tube 30 to the longitudinal end portion. Therefore, the condensed water is always guided to the end of the evaporator 13 and drained without staying on the lower surface of the evaporator 13, so that the condensed water is retained in the gap between the refrigerant tube 30 and the heat transfer fin 31 of the evaporator 13. Such a thing can be prevented and the fall of the refrigerating capacity of the evaporator 13 by this water retention can be prevented. At the same time, the condensed water collected is prevented from jumping out at a stretch and causing the water to fly.
[0069]
In addition, this invention is not limited to the above-mentioned embodiment, For example, although the above-mentioned embodiment demonstrated the integrated vehicle air conditioner, an intake unit, a cooler unit, and a heater unit are connected. The present invention can also be applied to a normal vehicle air conditioner, and the vehicle air conditioner can be variously modified without departing from the gist of the present invention.
[Brief description of the drawings]
FIG. 1 is a schematic cross-sectional view showing a vehicle air conditioner according to a first embodiment of the present invention.
FIG. 2 is a front view including a partial cross section of the vehicle air conditioner of FIG. 1;
FIG. 3 is an exploded perspective view showing a split case and an evaporator incorporated in the split case in the same embodiment.
FIG. 4 is a side view of an evaporator according to the embodiment.
FIG. 5 is a plan view of FIG. 4;
FIG. 6 is a schematic diagram illustrating a refrigerant circulation path of an evaporator according to the embodiment.
FIG. 7 is a cross-sectional view showing the structure of the windshield portion in the same embodiment.
FIG. 8 is a schematic sectional view showing another embodiment of the first embodiment.
FIG. 9 is a schematic sectional view showing another form of the first embodiment.
FIG. 10 is a schematic cross-sectional view showing a main part of a second embodiment of the present invention.
FIG. 11 is a schematic sectional view showing an essential part of a third embodiment of the present invention.
FIG. 12 is a schematic sectional view showing an essential part of a fourth embodiment of the present invention.
FIG. 13 is a schematic cross-sectional view showing a fifth embodiment of the present invention.
FIG. 14 is a schematic explanatory view showing a conventional vehicle air conditioner.
[Explanation of symbols]
10 Unit case
10a side wall
13 Evaporator
13A Evaporator core
15 Drainage section
30 Refrigerant tube
32 Evaporator tank
33 Evaporator tank
40 Drainage channel
40a receiving part
40b Guide part
60 Evaporator
61 Evaporator tank
62 Evaporator tank
F wind path
T ridge

Claims (9)

Air conditioning for vehicles in which the direction of air flow to the evaporator (13, 60) is set from the upper side to the lower side, and the drain part (15) is provided at the bottom of the unit case (10) in the wake of the evaporator (13, 60). In the device
The evaporator (13, 60) is arranged substantially horizontally along the longitudinal direction of the refrigerant tube (30) of the evaporator, and the evaporator (13, 60) is a unit case at the longitudinal end of the refrigerant tube (30) of the evaporator. Ventilation to the core portion (13A) of the evaporator (13, 60) , which is held on the side wall (10a) of (10) and upstream of the longitudinal end of the refrigerant tube (30) of the evaporator (13, 60). The air conditioning apparatus for vehicles characterized by the wind-shielding part (51, 52, 53, 54, 55, 56, 57, 58) which interrupts | blocks. The evaporator (13) is inclined with respect to a horizontal plane in a stacking direction of the refrigerant tubes (30) perpendicular to the longitudinal direction of the refrigerant tubes (30) of the evaporator (13). The vehicle air conditioner according to claim 1. The evaporator (13) is a type including tanks (32a, 32b, 33a, 33b) for distributing the refrigerant to both ends in the longitudinal direction of the refrigerant tube (30),
The evaporator (13) is held on the side wall (10a, 10a) of the unit case (10) by the tank (32a, 32b, 33a, 33b) portion of the evaporator (13). , 2 air conditioner for vehicles. The evaporator (60) is a type including a tank (61, 62) that distributes the refrigerant to either one of the longitudinal ends of the refrigerant tube (30),
The evaporator (60) is held on a side wall (10a, 10a) of the unit case (10) by a tank (61, 62) portion of the evaporator (60). Air conditioner for vehicles.   The vehicle air according to any one of claims 1 to 4, wherein the air passage (F) is configured so that the air that has passed downward through the evaporator (13, 60) is deflected upward. Harmony device.   6. A drainage path (40) for condensed water from the evaporator (13, 60) is formed in a portion of the unit case (10) holding the evaporator (13, 60). The air conditioning apparatus for vehicles according to any one of the above.   The drainage channel (40) includes a receiving portion (40a) for receiving condensed water flowing down from the lower side edge of the evaporator (13, 60), and an inner surface of the unit case (10) for receiving the condensed water from the receiving portion (40a). The vehicle air conditioner according to claim 6, further comprising a guide portion (40 b) that guides the flow down along the line. The evaporator (13) is inclined with respect to the horizontal plane in the stacking direction of the refrigerant tubes (30) perpendicular to the longitudinal direction of the refrigerant tubes (30) of the evaporator (13) and along the evaporator (13) 8. A vehicle air conditioner according to claim 7 , wherein a portion for holding the vehicle is inclined, and the guide portion (40b) is provided in a predetermined range in the vicinity of the inclined lower end of the receiving portion (40a). apparatus.   The evaporator (13) is a laminated type in which a number of flat refrigerant tubes (30) provided with a bowl-shaped part (T) for receiving condensed water at the lower end are laminated, and at least one end part of the bowl-shaped part (T). The vehicle air conditioner according to claim 6, wherein the air conditioner is disposed on the drainage channel (40).

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