JP4008317B2 - Air conditioner for vehicles - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicle air conditioner.
[0002]
[Prior art]
A conventional vehicle air conditioner includes an intake box that selectively introduces inside and outside air, a blower that blows air introduced from the intake box downstream, and a temperature control unit that dehumidifies and regulates the air from the blower. (See, for example, Patent Document 1). The temperature control unit includes a cooling unit and a heating unit, and the cooling unit and the heating unit are formed integrally or separately. Further, the intake box, the blower, and the temperature control unit are formed integrally or separately.
[0003]
[Patent Document 1]
JP 2002-79824 A (FIG. 1)
[0004]
[Problems to be solved by the invention]
In this type of vehicle air conditioner, consideration for rainwater entering the intake box is not sufficient, and there is a concern that rainwater may be stored in the intake box and mold may be generated by the stored water.
[0005]
As a measure to solve this, a structure in which a drain pipe is provided in the intake box is also conceivable. However, generally, the cooling unit (temperature control unit) is provided with a drain pipe below the cooling heat exchanger in order to discharge condensed water dehumidified and condensed by the cooling heat exchanger. Therefore, in the structure in which the drain pipe is provided in the intake box, the structure is provided with two drain pipes as an air conditioner, which not only complicates the apparatus but also complicates the assembly work.
[0006]
The present invention has been made against the background of the above-described prior art, and an object of the present invention is to provide a vehicle air conditioner that prevents rainwater from being stored in the intake box without providing a drain pipe in the intake box. Is an offer.
[0007]
[Means for Solving the Problems]
In the first aspect of the invention, the intake box for selectively introducing the inside and outside air, and a blower for blowing the air introduced from the intake box downstream, the air from the blower is dehumidified. In the vehicle air conditioner that regulates and blows out, a guide passage for guiding the fluid stored in the bottom wall portion of the intake box into the blower is provided on the suction port side of the scroll chamber of the blower. .
[0008]
According to a second aspect of the present invention, in the vehicle air conditioner according to the first aspect, a through hole is provided in a partition wall that divides the intake box and the blower, and one end of the intake box has an intake box. The guide passage is formed by connecting a tube disposed in the storage section.
[0009]
According to a third aspect of the present invention, in the vehicle air conditioner according to the first aspect, the intake box and the blower are connected in a substantially horizontal direction, and a partition wall that partitions the intake box and the blower is provided. By providing a through hole in a lower end portion, a bottom wall portion of the intake box is inclined downward toward the through hole, and arranged so that the through hole faces a storage portion of the intake box, the guide passage Is formed.
[0010]
【The invention's effect】
According to the first aspect of the present invention, the stored water stored in the bottom wall portion of the intake box is guided to the blower through the guide passage by the differential pressure between the intake box and the blower. The water guided to the blower is blown in the form of a mist to the downstream temperature control unit by the fan, captured in the heat exchanger for cooling in the temperature control unit, and drained below the heat exchanger for cooling as condensed water. Discharged from the pipe.
[0011]
As described above, according to the first aspect of the present invention, by providing the guide passage, it is possible to drain rainwater that has entered the intake box without providing the drain pipe structure of the intake box.
[0012]
According to the second aspect of the present invention, since the guide passage is constituted by the through hole and the tube connected to the through hole, the invention of the first aspect can be embodied with a relatively simple structure.
[0013]
According to the invention described in claim 3, since the guide passage is formed of a through hole, the invention described in claim 1 can be embodied with a simpler configuration.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of a vehicle air conditioner according to the invention will be described with reference to the drawings.
[0015]
1 to 4 show a vehicle air conditioner according to a first embodiment. FIG. 1 is a front view including a partially broken portion showing the vehicle air conditioner according to the first embodiment. 2 is a side sectional view of the vehicle air conditioner, FIG. 3 is a side view showing the vicinity of the blower of the vehicle air conditioner shown in FIGS. 1 and 2, and FIG. 4 is a view showing the vicinity of the through hole of the blower of the vehicle air conditioner. The fractional diagram a is a sectional view, and the fractional diagram b is a side view.
[0016]
The vehicle air conditioner according to this embodiment includes an intake box 12 and a blower integrated temperature control unit 1 in which a blower, a cooler, and a heater are integrated.
[0017]
Basic structure of the intake box The intake box 12 includes a case 16 having an inside air inlet 13 and an outside air inlet 14, and is pivotally supported in the case 16 and selectively opens and closes the inside air inlet 13 and the outside air inlet 14. And a door 15 for adjusting the intake ratio of the inside and outside air sucked into the blower 3. The intake box 12 has a cylindrical mounting portion 31 fitted into a cylindrical mounting portion 32 protruding from the outer peripheral side of the suction port 9 a of the blower 3.
[0018]
Basic structure of blower integrated temperature control unit A blower integrated temperature control unit 1 includes a blower 3, an air filter 4, an evaporator 5 as a cooling heat exchanger, an air mix door 6, and a unit case 2. It comprises a heater core 7 as a heat exchanger for heating and blowing mode switching doors 20, 21, 22.
[0019]
The blower 3 is formed at the upstream end of the air flow path in the unit case 2 and includes a scroll chamber 9 having a suction port 9a in the axial direction of the spiral shaft, a fan 10 accommodated in the scroll chamber 9, and the fan 10 And an electric motor M (not shown) for driving the air, and the air introduced from the intake box 12 is blown downstream. In this embodiment, the blower 3 is connected with the suction port 9a of the blower 3 facing in the horizontal direction and being connected to the intake box 12 in a substantially horizontal direction.
[0020]
The air filter 4 is disposed on the upstream side of the evaporator 5, and prevents foreign matter from accumulating on the fins (not shown) of the evaporator 5 and the fins (not shown) of the heater core 7 to reduce the cooling capacity and the heating capacity. This prevents dust and dust from being blown into the passenger compartment.
[0021]
The evaporator 5 as a cooling heat exchanger is interposed in a refrigeration cycle (not shown), and circulates a refrigerant in a low-temperature and low-pressure state inside so that the refrigerant absorbs heat. On the other hand, the heater core 7 as a heat exchanger for heating is interposed in a hot water line (not shown) and generates heat using engine cooling water that has become high temperature due to exhaust heat of the engine as a heat source. Here, the evaporator 5 also has a dehumidifying performance, and dehumidifies the inside and outside air introduced from the intake box 12. For this reason, a drainage structure for draining the condensed water condensed by the evaporator 5 is provided below the evaporator 5. Specifically, below the evaporator 5, a water collecting part 23 for collecting the condensed water of the evaporator 5 and a drain pipe (not shown) for discharging the condensed water from the lower end of the water collecting part 23 to the outside of the unit case 2. I have.
[0022]
The air mix door 6 is disposed on the downstream side of the evaporator 5 and on the upstream side of the heater core 7. The flow rate of air is adjusted so that a predetermined blowing temperature is obtained in the air mix chamber P3 provided at the junction of the hot air passage P1 and the bypass passage P2. In addition, the air mix door 6 of this embodiment is a slide type, and is provided with a door case, a door body, a slide mechanism that slides and moves the door body, and drive means.
[0023]
On the downstream side of the air mix chamber P3, a defroster outlet passage 17, a vent outlet passage 18, and a foot outlet passage 19 branched from the air mix chamber P3 are provided. A defroster duct (not shown) is connected to the downstream end portion of the defroster outlet passage 17 in order to blow out the conditioned air to the front window glass of the vehicle. The downstream end portion of the vent outlet passage 18 receives the conditioned air toward the passenger chest. A center vent duct (not shown) for blowing out and a side vent duct (not shown) for blowing conditioned air toward the vehicle side window glass are connected, and the downstream end of the foot blowing passage 19 is air-conditioned toward the passenger's feet. A front foot duct (not shown) and a rear foot duct (not shown) for blowing wind are connected.
[0024]
A defroster door 20, a vent door 21, and a foot door 22 as mode switching doors are provided at the inflow ends of the blowout passages 17, 18, 19. The defroster door 20 opens and closes the defroster outlet passage 17, the vent door 21 opens and closes the vent outlet passage 18, and the foot door 22 opens and closes the foot outlet passage 19. These mode switching doors 20, 21, and 22 are in the blowing mode. Open / close control is performed via the control means according to the setting or the indoor temperature setting.
[0025]
The rainwater drainage structure of the intake box In this embodiment, the drainage pipe is not formed in the intake box 12, but the rainwater stored in the intake box 12 is drained. This will be described in detail below.
[0026]
As shown in FIGS. 1 and 4, the bottom wall portion 33 of the intake box 12 is inclined downward toward the blower 3. That is, the lower end portion of the cylindrical attachment portion 32 of the blower 3 serves as a rainwater storage portion 34 that has entered the intake box 12. A through-hole 35 as a “guide passage” is formed in the casing portion of the blower 3 so as to face the storage portion 34. When the fan 10 is driven, a pressure difference between the inside of the scroll chamber 9 and the intake box 12 is generated. Rainwater stored in the storage portion 34 of the intake box 12 is sucked into the scroll chamber 9 from the through hole 35. The rainwater guided to the scroll chamber 9 is blown in the form of a mist downstream by the fan 10. The mist-like rainwater is captured by the downstream evaporator 5 and is discharged as a condensed water from a drain pipe (not shown) through the water collecting portion 23 below the evaporator 5.
[0027]
Thus, according to the vehicle air conditioner of this embodiment, rainwater that has entered the intake box 12 can be drained without providing the drain pipe of the intake box 12 by providing the through hole 35 (guidance passage). As a result, since the vehicle air conditioner of this embodiment is not a structure in which the intake box 12 is provided with a drainage structure but two drain pipes, the assembly workability of the intake box 12 and the temperature control unit 1 is improved. In addition, the workability of attachment to the vehicle body is improved.
[0028]
Moreover, in this embodiment, the following devices are also made. Specifically, using the fact that a blower passage is present immediately below the scroll chamber 9 of the blower 3, as shown in FIG. 3, a drain communicating with the blower passage is provided at the lower end of the scroll chamber 9 of the blower 3. A hole 36 is provided. As described above, since the drain hole 36 communicating with the air passage is provided at the lower end of the scroll chamber 9 of the blower 3, the rainwater introduced into the scroll chamber 9 cannot be misted and sent to the air passage. Even when it is time (for example, when the blower 3 is in the weak feeding operation), rainwater can be dropped into the blower passage by the drain hole 36. Therefore, according to the vehicle air conditioner of this embodiment, in addition to the above effects, it can be avoided that rainwater accumulates in the blower 3 during low wind operation.
[0029]
2nd Embodiment: FIGS. 5-7 shows the vehicle air conditioner of 2nd Embodiment. 5 is a front view showing the vicinity of the intake box, FIG. 6 is a side view showing the vicinity of the intake box mounting portion, FIG. 7 is a view showing the vicinity of the suction port of the blower, a partial view a is a longitudinal sectional view, and a partial view b is It is a side view. In addition, about the structure similar to 1st Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.
[0030]
The vehicle air conditioner of the second embodiment is different from the configuration of the first embodiment in that the rainwater storage portion 42 of the intake box 41 is separated from the through hole 43 and exists at a position lower than the through hole 43.
[0031]
The intake box 41 has a cylindrical mounting portion 44 that is tapered toward the tip side (blower side), and a bottom wall portion 45 that is inclined upward toward the blower 3 side. Therefore, the rainwater storage part 42 of the intake box 41 is separated from the blower 3.
[0032]
A through hole 43 facing the intake box 41 provided in the blower 3 is provided with a tube mounting boss 47 projecting from the peripheral edge into the intake box 41. A tube 48 is attached to the boss 47, and one end of the tube 48 is disposed in the storage portion 42 of the intake box 41.
[0033]
According to the vehicle air conditioner of the second embodiment as described above, the pressure is stored in the intake box 41 through the guide passage 49 including the through hole 43, the boss 47 and the tube 48 due to the differential pressure between the intake box 31 and the blower 3. Rain water to be sucked into the blower 3. Thereby, the same effect as the first embodiment can be obtained. Further, according to the vehicle air conditioner of the second embodiment, the number of parts is increased because the tube 48 is used compared to the first embodiment, but the tube 48 can be routed relatively freely. Therefore, the design freedom of the intake box 41 and the blower 3 is increased.
[0034]
3rd Embodiment: FIGS. 8-10 shows the vehicle air conditioner of 3rd Embodiment. FIG. 8 is a front view showing the vicinity of the intake box, FIG. 9 is a side view showing the vicinity of the intake box mounting portion, FIG. 10 is a view showing the vicinity of the suction port of the blower, a partial view a is a longitudinal sectional view, and a partial view b is It is a side view. In addition, about the structure similar to 2nd Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.
[0035]
The vehicle air conditioner according to the third embodiment is different from the second embodiment in that a lid 52 made of a resin having a U-shaped cross section is used instead of the tube 48.
[0036]
The lid body 52 is attached to the bottom wall portion 45 of the intake box 41 and forms a passage 51 with the bottom wall portion 45. One end of the passage 51 is disposed so as to face the storage portion 42, and the other end is connected to a mounting portion 54 that protrudes from the periphery of the through hole 53 of the blower 3 toward the intake box 51. Thus, a guide passage 55 that guides rainwater accumulated in the storage portion 42 of the intake box 41 to the blower 3 is formed by the through hole 53, the attachment portion 54, and the passage 51.
[0037]
According to the vehicle air conditioner of the third embodiment, the same effects as those of the first and second embodiments can be obtained.
[0038]
As described above, according to the present invention, since the guide passage that guides the fluid stored in the bottom wall portion of the intake box to the blower is provided, the rainwater stored in the bottom wall portion of the intake box first includes the intake box and the blower. After being guided to the blower by the pressure difference of the pressure and further blown by the blower, it is captured by the cooling heat exchanger and discharged as condensed water from the drain pipe below the cooling heat exchanger. Therefore, it is not necessary to provide a drain pipe in the intake box. As a result, the mounting workability between the intake box and the air conditioning unit is improved while the drainage structure of the intake box is provided, and the mounting workability to the vehicle body is improved.
[Brief description of the drawings]
FIG. 1 is a front view including a partially broken portion showing a vehicle air conditioner according to a first embodiment.
FIG. 2 is a side sectional view of the vehicle air conditioner.
FIG. 3 is a side view showing the vicinity of a blower mounting portion of the vehicle air conditioner.
FIG. 4 is a view showing the vicinity of a through hole of a blower of the vehicle air conditioner, where a part a is a sectional view and a part b is a side view.
FIG. 5 is a front view showing an essential part of a vehicle air conditioner according to a second embodiment.
FIG. 6 is a side view of the vehicle air conditioner.
FIG. 7 is a view showing the vicinity of a through hole of a blower of the vehicle air conditioner, wherein a partial view a is a cross-sectional view and a partial view b is a side view.
FIG. 8 is a front view showing an essential part of a vehicle air conditioner according to a third embodiment.
FIG. 9 is a side view of the vehicle air conditioner.
FIG. 10 is a view showing the vicinity of a through hole of a blower of the vehicle air conditioner, where a part a is a sectional view and a part b is a side view.
[Explanation of symbols]
3 Blower 12 Intake box 33 Bottom wall 34 Reservoir 35 Through hole (guide passage)
41 Intake box 43 Through-hole 45 Bottom wall portion 48 Tube 49 Guide passage 55 Guide passage

Claims (3)

An intake box (12, 41) that selectively introduces internal and external air, and a blower (3) that blows air introduced from the intake box (12, 41) downstream from the blower (3). In the vehicle air conditioner that dehumidifies the temperature of the air and blows it out,
The guide passages (35, 49, 55) for guiding the fluid stored in the bottom walls (33, 45) of the intake box (12, 41) into the blower (3) are connected to the scroll chamber (9) of the blower (3). ) On the suction port (9a) side of the vehicle air conditioner. The vehicle air conditioner according to claim 1,
By providing a through hole (43) in the blower (3), and connecting a tube (48), one end of which is arranged in the storage part (34) of the intake box (41), to the through hole (43), A vehicle air conditioner characterized in that a guide passage (49) is formed. The vehicle air conditioner according to claim 1,
The intake box (12) and the blower (3) are connected in a substantially horizontal direction,
By arranging the bottom wall portion (33) of the intake box (12) to be inclined downward toward the blower (3), the storage portion (34) of the intake box (12) is disposed close to the blower (3). The vehicle air conditioner is characterized in that the guide passage (35) is formed by providing a through hole (35) at a position facing the storage part (34) of the blower (3).

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