JPH0568709U - Automotive air conditioner - Google Patents

Abstract

(57) [Summary] [Purpose] Prevents condensed water generated on the evaporator surface during cooling operation from being sucked into the heater case due to rotation of the heater blower, and prevents condensed water from scattering into the vehicle. [Structure] On the inner wall surface of the evaporator case 3 on the downstream side of the evaporator core 5, a first shielding wall 14 that covers the lower inner part of the connecting pipe 13 is provided, and at the inlet of the heater case 3, the connecting pipe 13 extends in the radial direction. In addition, the second shielding wall 17 bent toward the inner wall of the connecting pipe 13 is provided. As a result, first, the first shielding wall
At 14, the condensed water generated on the surface of the evaporator core 5 is prevented from being sucked into the heater case 2. Further, the second shield wall 17 allows the condensed water that has passed over the first shield wall 14 and has passed through the inner wall of the connecting pipe 13. To prevent the suction into the heater case 2. Therefore, it is possible to prevent the condensed water from scattering into the vehicle.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an automobile air conditioner, and more particularly to an automobile air conditioner that prevents the infiltration of condensed water generated on the surface of an evaporator core into a vehicle interior.

[0002]

[Prior Art]

 An evaporator generally used in an air conditioner for a vehicle is mounted inside an evaporator case 3 arranged between an inside / outside air box 1 and a heater case 2, as shown in FIG. The outside air or the inside air, which is selectively introduced by the rotation of the damper 4 provided in the inside / outside air box 1, passes through the inside of the evaporator case 3 and enters the passenger compartment from the heater case 2 through a plurality of ducts not shown in the drawings. Supplied. During the cooling operation, the air from the inside / outside air box 1 is cooled in the evaporator case 3 by exchanging heat with the refrigerant by the evaporator core 5. At this time, dew condensation occurs on the surface of the evaporator core 5 and accumulates on the bottom of the evaporator case 3 as time passes. A drain hose 6 is connected to a lower portion of the evaporator case 3 for discharging the condensed water to the outside of the vehicle. A heater blower 8 rotated by a blower motor 7 is provided inside the heater case 2.

However, during the cooling operation as described above, when the air volume by the heater blower 8 is large, the downstream portion of the evaporator core 5 has a negative pressure, so that a part of the condensed water is sucked into the heater side together with the air and passes through the duct. There was a problem of reaching the passenger compartment.

In order to solve this problem, for example, in Japanese Utility Model Publication No. 58-28893, a partition 9 is provided at the air outlet of the evaporator case 3 as shown in FIG. There is a construction in which the filter is attached, and the filter 10 attached to the partition 9 tries to capture the condensed water that is about to be sucked into the heater side. Further, in Japanese Utility Model Publication No. 63-487, as shown in FIG. 7, a blow-up preventing slope plate 11 having a wavy cross section is provided above the bottom of the evaporator case 3 on the leeward side of the evaporator core 5, and the slope plate is also provided. There is a structure in which a partition wall 12 is provided in the space below 11 and the sloping plate 11 and the partition wall 12 try to prevent the condensation water from scattering.

[0005]

[Problems to be solved by the device]

 However, in both configurations, although there is some effect of preventing condensed water, so-called water splashing, in the former case, it is not preferable because the filter 10 becomes a resistance and causes a decrease in air volume, and in the latter case, the inclination There is a problem that the plate 11 and the partition wall 12 have a complicated structure, which increases the manufacturing cost.

Therefore, an object of the present invention is to provide an automotive air conditioner having a simple structure, which does not require manufacturing cost and which prevents the condensation water generated on the evaporator surface from scattering without reducing the air flow. That is.

[0007]

[Means for Solving the Problems]

 As a means for solving the above problems, the present invention has an evaporator core built-in between an inside / outside air box for selectively introducing outside air and inside air and a heater case containing a heater blower driven by a motor. In an automobile air conditioner provided with an evaporator case, a first shielding wall that covers an inner lower portion of a connecting pipe connecting the evaporator case and the heater case is provided on an inner wall surface of the evaporator case on a downstream side of the evaporator core. And a second shielding wall extending in the radial direction of the connecting pipe at the inlet of the heater case and bent toward the inner wall of the connecting pipe, or protruding downward in the middle portion of the connecting pipe. The configuration is characterized by the provision of the condensed water pool.

[0008]

[Action]

 With the above configuration, dew condensation occurs on the surface of the evaporator core during cooling operation, and it drops and accumulates in the lower part of the evaporator case as condensed water.At this time, part of the condensed water is generated by the rotation of the heater blower. It is about to be sucked into the heater case, which is prevented by the first shielding wall. Even if a part of the condensed water exceeds the first shielding wall, the second shielding wall or the condensation pool is provided to effectively prevent the condensed water from being sucked into the heater case. You can

[0009]

【Example】

 An embodiment of the present invention will be described below with reference to the accompanying drawings. The same members as those in the above figures are designated by the same reference numerals.

In FIG. 1, an evaporator case 3 containing an evaporator core 5 is connected to a heater case 2 containing a heater blower 8 rotated by a blower motor 7 by a connecting pipe 13. A first shielding wall 14 is provided below the outlet portion of the evaporator case 3. As is apparent from FIG. 2 in addition to FIG. 1, the first shielding wall 14 is horizontally long so as to cover the lower portion of the circular hole 15 formed by the connecting pipe 13. Further, the first shielding wall 14 more effectively prevents suction of the condensed water to the heater case 2 side, so that the upper half 14a thereof faces the evaporator core 5 side and the tip thereof is directed substantially downward. Is folded like this. The remaining lower half 14b is appropriately fixed to the constituent member of the outlet portion of the evaporator case 3 by means such as welding.

Further, in FIG. 1, a second shielding wall 17 is provided on the wall member 16 of the heater case 2 on the side of the evaporator core 5. The second shielding wall 17 is provided at a right angle connecting portion of the wall member 16 with the connecting pipe 13 and extends by an appropriate length toward the radial center of the connecting pipe 13, and its tip is an inner wall of the connecting pipe 13. Has been folded towards. At this time, since the second shielding wall 17 forms the blower suction port of the heater case 2, the second shielding wall 17 is formed in a shape that increases the air suction efficiency and may possibly reach the inner wall of the connecting pipe 13. It is formed in a shape that prevents a certain amount of condensed water from being sucked into the heater case 2.

During the cooling operation in the above-described embodiment, the air from the inside / outside air box 1 in the evaporator case 3 is cooled by heat exchange with the refrigerant by the evaporator core 5. At this time, dew condensation occurs on the surface of the evaporator core 5, drops below the evaporator case 3, and accumulates as condensed water at the bottom of the evaporator case 3 as time passes. Most of the condensed water is discharged from the drain hose 6 to the outside of the vehicle, but some of the condensed water is likely to be sucked into the heater case 2 due to the negative pressure generated in the downstream of the evaporator core 5 by the rotation of the heater blower 8. .. However, this part of the condensed water is blocked by the first shielding wall 14 and is not sucked into the heater case 2. Further, even if there is condensed water that has passed through the inner wall surface of the connecting pipe 13 beyond the first shield wall 14, the second shield wall 17 prevents the condensed water from entering the heater case 2. be able to.

As described above, in this embodiment, by providing the first and second shielding walls having a simple structure between the evaporator core 5 and the inside of the heater case 2, the infiltration of the condensed water into the heater case 2 can be achieved. Can be reliably prevented.

Next, another embodiment will be described with reference to FIGS. 3 and 4. Incidentally, in FIG. 3, the shielding wall 14 mounted in the evaporator case 3 has the same structure as the first shielding wall in the above-mentioned embodiment, and therefore its explanation is omitted. In the present embodiment, a cylindrical extension tube 18 is formed from the evaporator case 3 toward the heater case 2 side, and the extension tube 18 is opposed to the extension tube 18 from the wall member 15 on the evaporator core 5 side of the heater case 2. The elongated portion 15a is formed, and these two are fitted to each other to form the connecting pipe 19. As is clear from FIG. 4, a condensed water pool 20 protruding downward is formed in the connecting pipe 19 between the evaporator case 3 and the heater case 2. At the bottom of the condensed water pool 20, a water absorbing felt 21 is stored.

With this configuration, even if the condensed water passes over the shield wall 14 and travels through the connecting pipe 19 and tries to enter the heater case 2, the condensed water pool 20 provided in the connecting pipe 19 is prevented. Since it enters, the condensed water can be prevented from entering the heater case 2, and is absorbed by the felt 21 in the condensed water pool 20, so that the condensed water can be transferred from the condensed water pool 20 to the heater case 2. Can be efficiently prevented.

[0016]

[Effect of the device]

 As is clear from the above description, the inner wall surface of the evaporator case on the downstream side of the evaporator core is provided with the first shielding wall that covers the inner lower portion of the connecting pipe that connects the evaporator case and the heater case, and further the heater case. By providing a second shielding wall extending in the radial direction of the connecting pipe at the inlet of the connecting pipe and bending toward the inner wall of the connecting pipe, or a condensed water pool protruding downward in the middle part of the connecting pipe, It is possible to effectively prevent the condensed water from being sucked into the heater case. Therefore, condensed water can be prevented from splashing from the heater case into the room through the duct, and the room and the occupant's clothes are not soiled. Furthermore, since there is no reduction in the air volume due to the first shielding wall, the second shielding wall, or the pool of condensed water, it is possible to prevent the scattering of condensed water without reducing the efficiency of the air conditioner.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a cross-sectional view showing another embodiment of the present invention.

FIG. 4 is a cross-sectional view taken along the line BB of FIG.

FIG. 5 is a cross-sectional view showing a conventional automobile air conditioner.

FIG. 6 is a cross-sectional view showing a conventional evaporator structure.

FIG. 7 is a cross-sectional view showing another conventional evaporator structure.

[Explanation of symbols]

 1 Inside / outside air box 2 Heater case 3 Evaporator case 5 Evaporator core 8 Heater blower 13 Connection pipe 14 First shield wall 16 Wall member 17 Second shield wall 19 Connection pipe 20 Condensate pool 21 Felt

Claims (1)

[Scope of utility model registration request] 1. An air conditioner for an automobile, wherein an evaporator case having an evaporator core is provided between an inside / outside air box for selectively introducing outside air and inside air and a heater case containing a heater blower driven by a motor. In the inner wall surface of the evaporator case on the downstream side of the evaporator core, a first shielding wall that covers a pipe inner lower portion of a connecting pipe that connects the evaporator case and the heater case is provided, and the inlet of the heater case is provided with the first shielding wall. A second shielding wall extending in the radial direction of the connecting pipe and bent toward the inner wall of the connecting pipe, or a condensed water pool protruding downward at an intermediate portion of the connecting pipe. Automotive air conditioning system.