KR20080060879A - Draining structure of air conditioning system for automotive vehicles - Google Patents

Abstract

A drain system of an air conditioner for a vehicle is provided to prevent water from flowing back from a cooling chamber due to negative pressure in a drain passage, thereby protecting a blower against water. A drain system(40) of an air conditioner for a vehicle comprises a drain port(42), a drain passage(44), and a stepped portion(50). The drain port is formed on a case(10) to let condensed water falling from an evaporator(30) out. The drain passage connects a blower chamber(12) to the drain port to let the water entered a blower(20) discharged through the drain port. The stepped portion is progressively lowered on a water passage from the drain passage to the drain port, to prevent backflow of water from the drain port side to the drain passage.

Description

Draining structure of vehicle air conditioning system {DRAINING STRUCTURE OF AIR CONDITIONING SYSTEM FOR AUTOMOTIVE VEHICLES}

1 is a cross-sectional view showing a drainage structure of a general air conditioning system,

2 is a cross-sectional view taken along the line II-II of FIG. 1;

3 is a cross-sectional view showing a drainage structure of a vehicle air conditioning system according to the present invention;

4 is a cross-sectional view taken along the line IV-IV of FIG. 3;

5 is a perspective view showing a drainage structure of the present invention.

♣ Explanation of symbols for main part of drawing ♣

10: air conditioning case 12: air blowing room

17: cooling chamber 17a: bottom surface

20: blower 22: blower fan

24: blown motor 30: evaporator

40: drainage structure 42: drainage hole

44: drain passage 44a: entrance

44b: exit 50: stepped step

The present invention relates to a drainage structure of a vehicular air conditioning system, and more particularly, to a drainage structure of a vehicular air conditioning system that can prevent the backflow of water on the side of the water outlet for the air intake action of the blower fan. will be.

The car is equipped with an air conditioning system to control the indoor air temperature. The air conditioning system generates warmth in winter to keep the room warm, and generates cool air in summer to keep the room cool.

This air conditioning system, as shown in Figure 1, has an air conditioning case (10). A ventilation chamber 12 is formed in the air conditioning case 10, and a blower 20 is installed in the ventilation chamber 12.

The blower 20 includes a blower fan 22 and a blower motor 24 for driving the blower fan 22. The blower 20 sucks internal / external air through the outdoor air inlet 13 or the internal air inlet 14 formed in the air conditioning case 10, and then sucks the internal / external air into the internal passage of the air conditioning case 10. Blow on (15).

Here, the blower fan 22 of the blower 20 is a bidirectional suction type fan, and consists of the upper 1st fan part 22a and the lower 2nd fan part 22b, These 1st and 2nd fan parts 22a. , 22b) respectively sucks the upper air and the lower air of the blower chamber 12, and blows the sucked air into the inner passage 15, respectively.

The air conditioning system includes a cooling chamber 17 formed on the inner passage 15 of the air conditioning case 10 and an evaporator 30 provided in the cooling chamber 17.

The evaporator 30 includes a plurality of tubes (not shown) through which the refrigerant can flow, cools the air blown into the cooling chamber 17, and introduces the cooled air into the interior of the vehicle to increase the indoor temperature. Keep it comfortable.

1 and 2, the air conditioning system drains condensate generated at the surface of the evaporator 30 and moisture introduced into the blower chamber 12 from the outside air inlet 13. It has a structure 40.

The drainage structure 40 includes a drain port 42 formed in the bottom surface 17a of the cooling chamber 17, a bottom surface 12a of the blower chamber 12, and a bottom surface 17a of the cooling chamber 17. It consists of a drain passage 44 for connecting.

The drain port 42 is formed in the bottom surface 17a of the cooling chamber 17 below the evaporator 30, and discharges condensed water falling from the surface of the evaporator 30 to the outside of the air conditioning case 10.

The drain passage 44 has an inlet 44a communicating with the bottom surface 12a of the air blowing chamber 12, and an outlet 44b communicating with the bottom surface 17a of the cooling chamber 17. Water accumulated in the bottom surface 12a of (12) is drained to the bottom surface 17a of the cooling chamber 17. Therefore, the water drained to the bottom surface 17a of the cooling chamber 17 may be discharged to the outside of the air conditioning case 10 through the drain hole 42 of the bottom surface 17a, and thus, the ventilation chamber ( 12) discharges the water introduced into the air conditioning case (10).

Since the drainage structure 40 discharges the condensate generated in the evaporator 30 and the moisture in the blower chamber 12 introduced together with the outside air, the drainage structure 40 includes the condensed water of the evaporator 30 and the moisture in the blower chamber 12. It prevents damage and failure of various devices.

However, such a conventional drainage structure 40 has a problem in that when the bidirectional suction blower fan 22 sucks air, moisture in the cooling chamber 17 flows back into the drain passage 44.

That is, the 2nd fan part 22b of the blowing fan 22 is comprised so that the lower air of the blowing chamber 12 may be inhaled. Therefore, when the second fan portion 22b sucks the lower air of the blowing chamber 12, a negative pressure is formed in the drain passage 44 formed in the bottom surface 12a of the blowing chamber 12. Due to the negative pressure thus formed, there occurs a problem that water in the cooling chamber 17 flows back into the drain passage 44 and the blowing chamber 12. In particular, it causes a serious problem that the blower motor 24 is damaged or broken due to moisture flowing back into the blower chamber 12.

On the other hand, although the step portion 17b is formed between the drain passage 44 and the bottom surface 17a of the cooling chamber 17 to prevent backflow of water, but the negative pressure formed in the drain passage 44 is very low. It has been pointed out that the problem of preventing water from flowing backwards.

The present invention has been made to solve the above conventional problems, the purpose of which is the drainage structure of a vehicle air conditioning system that can prevent the backflow of water from the cooling chamber to the drain passage when the air intake action of the blower fan To provide.

Another object of the present invention is to provide a drainage structure of a vehicle air conditioning system that can prevent the failure and damage of the blower due to the back flow of water by blocking the back flow of water in the cooling chamber.

In order to achieve the above object, the drainage structure of the vehicular air conditioning system of the present invention, the drain port formed in the air conditioning case to discharge the condensate water falling from the evaporator, and the water flowing into the blower from the blower chamber drain In the drainage structure of the vehicle air conditioning system including a drain passage connecting the ventilation chamber and the drain to be discharged to the, is formed to be gradually lowered on the water movement path from the drain passage to the drain opening, from the drain port side It characterized in that it comprises a stepped step to prevent water backflow into the drain passage.

Preferably, the stepped step, characterized in that formed integrally on the bottom surface of the lower side of the evaporator.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a drainage structure of a vehicle air conditioning system according to the present invention will be described in detail with reference to the accompanying drawings (the same components will be described with the same reference numerals).

3 is a cross-sectional view showing a drainage structure of a vehicle air conditioning system according to the present invention, FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. 3, and FIG. 5 is a perspective view showing the drainage structure of the present invention.

First, before looking at the features of the drainage structure according to the present invention, a brief look at the configuration of the drainage structure.

As shown in FIG. 3, the drainage structure 40 includes a drain hole 42 formed in the bottom surface 17a of the cooling chamber 17, a bottom surface 12a of the blowing chamber 12, and a cooling chamber ( It consists of a drain passage 44 connecting the bottom surface 17a of the 17.

The drain port 42 is formed in the bottom surface 17a of the cooling chamber 17 below the evaporator 30, and discharges condensed water falling from the surface of the evaporator 30 to the outside of the air conditioning case 10.

The drain passage 44 has an inlet 44a communicating with the bottom surface 12a of the air blowing chamber 12, and an outlet 44b communicating with the bottom surface 17a of the cooling chamber 17. Water accumulated in the bottom surface 12a of (12) is drained to the bottom surface 17a of the cooling chamber 17.

Therefore, the water drained to the bottom surface 17a of the cooling chamber 17 is drained to the drain opening 42 while moving toward the drain opening 42 of the bottom surface 17a, and thus the air blowing chamber 12 Discharges the water introduced into the air conditioning case 10 outside.

Next, look at in detail the features of the drainage structure according to the present invention.

3 to 4, the drainage structure of the present invention has a configuration in which a stepped step 50 is formed on the bottom surface 17a of the cooling chamber 17 connected to the drain passage 44. .

The stepped step portion 50 is formed on the water movement path from the outlet 44b of the drain passage 44 to the drain port 42 of the cooling chamber 17, and the outlet 44b of the drain passage 44. Has a gradually lowering configuration.

Here, the stepped step 50 is integrally molded in the process of forming into the air conditioning case 10, and the height of each step 50 is preferably as high as possible without disturbing the flow of water. . In addition, the number of steps of the stepped section 50 is preferably configured to be as many as possible without limiting the flow of water.

The cut-out step part 50 of such a structure allows the flow of water drained from the outlet 44b of the drain passage 44 to the drain port 42 of the cooling chamber 17. However, the flow of water flowing back from the drain port 42 to the drain passage 44 is blocked.

Accordingly, even when the blower 20 of the blower chamber 12 is operated to form a negative pressure in the drain passage 44, a water backflow from the cooling chamber 17 to the drain passage 44 is prevented. In particular, even if the rotation speed of the blower 20 becomes very high so that a very high negative pressure is formed in the drain passage 44, the water backflow from the cooling chamber 17 to the drain passage 44 is prevented.

The present invention of such a configuration, since the air intake action of the blower 20, since the structure to block the water backflow phenomenon of the cooling chamber 17 caused by the negative pressure of the drain passage 44, due to the water backflow phenomenon Damage and failure of the blower 20 generated can be prevented in advance.

Although the preferred embodiments of the present invention have been described above by way of example, the scope of the present invention is not limited to these specific embodiments, and may be appropriately changed within the scope of the claims.

As described above, according to the drainage structure of the vehicle air conditioning system according to the present invention, since the moisture in the cooling chamber is prevented from flowing back to the drainage passage, it is generated due to the negative pressure of the drainage passage during the air suction action of the blower. It is possible to fundamentally block the water backflow phenomenon of the cooling chamber, thereby preventing the damage and failure of the blower caused by the water backflow phenomenon in advance.

Claims (2)

The drain port 42 formed in the air conditioning case 10 and the water introduced into the blower 20 to discharge the condensed water falling from the evaporator 30 from the blower chamber 12 to the drain hole 42. In the drainage structure of a vehicle air conditioning system including a drain passage 44 for connecting the blower chamber 12 and the drain port 42 so as to discharge, Stepped step portion 50 is formed to be gradually lowered on the water movement path from the drain passage 44 to the drain port 42, to prevent the back flow of water from the drain port 42 side to the drain passage 44 Drainage structure of a vehicle air conditioning system comprising a. The method of claim 1, The stepped step (50), the drainage structure of the vehicle air conditioning system, characterized in that integrally molded on the bottom surface (17a) of the lower side of the evaporator (30).

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