KR20080009425A - Drainage Structure of Vehicle Air Conditioning System - Google Patents

Abstract

The present invention relates to a drainage structure of an air conditioning system for a vehicle, and aims to prevent water backflow in the drainage passage by relieving the negative pressure formed in the water discharge drainage passage when the air blowing fan acts on air suction.

In order to achieve the above object, the present invention, the drain hole formed in the air conditioning case to discharge the condensate water falling from the evaporator, and the blower chamber and the drain port so that the water introduced into the blower can be discharged from the blower chamber to the drain outlet. A drainage structure of a vehicular air conditioning system including a drainage passage, characterized by further comprising a bypass passage communicating the inner passage of the blower with the drainage passage to supply a part of the blower discharge air to the drainage passage side. .

According to the present invention, when the air intake action of the blower, it is possible to prevent the water backflow phenomenon of the drain passage and the drain port caused by the negative pressure of the drain passage inherently, thus, damage to the blower caused by the water backflow phenomenon It has the effect of preventing over failure in advance.

Description

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

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

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

3 is a cross-sectional view showing a modification of the drainage structure according to the present invention;

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

♣ Explanation of symbols for main part of drawing ♣

10: air conditioning case 12: air blowing room

20: blower 22: blower fan

24: blown motor 30: evaporator

100: drain 110: drain passage

112: entrance 114: exit

120: bypass passage 122: inlet

124: outlet portion 126: guide portion

The present invention relates to a drainage structure of an air conditioning system for a vehicle, and more particularly, to relieve the negative pressure formed in the drainage passage for water discharge during the air suction action of the blower fan to prevent water backflow in the drainage passage. It relates to a drainage structure of a vehicle air conditioning system.

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 first passage 15a and the second passage 15b of the inner passage 15, respectively.

The air conditioning system includes an evaporator 30 installed in the inner passage 15 of the air conditioning case 10. The evaporator 30 includes a plurality of tubes (not shown) through which the refrigerant can flow, cools the air blown through the inner passage 15, and introduces the cooled air into the interior of the vehicle to increase the indoor temperature. Keep it comfortable.

The air conditioning system includes a condensate generated on the surface of the evaporator 30 and a drainage structure 40 for discharging water introduced into the blower chamber 12 from the outside air inlet 13.

The drainage structure 40 includes a drainage port 42 formed in the bottom surface 10a below the evaporator 30, and a drainage passage 44 connecting the bottom surface 12a of the blower chamber 12 and the drainage hole 42. It is composed of

The drain port 42 discharges the condensed water falling from the surface of the evaporator 30 to the outside of the air conditioning case 10.

The drain passage 44 communicates the bottom surface 12a of the blower chamber 12 with the drain hole 42, and drains water accumulated on the bottom surface 12a of the blower chamber 12 to the drain hole 42. Therefore, the water introduced into the blowing chamber 12 is discharged to the outside of 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 condensed water of the evaporator 30 and the moisture in the blower chamber 12 It prevents damage and failure of various devices that occur.

However, such a conventional drainage structure 40 has a problem in that the water in the drain passage 44 and the drain port 42 flows back when the bidirectional suction blower fan 22 sucks air.

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 formed in this way, a problem arises in that water in the drain passage 44 and the drain port 42 flows back into the blower chamber 12.

On the other hand, the water flowing back into the blower chamber 12 is introduced into the blower motor 24, causing a problem that damages or blows the blower motor 24.

The present invention has been made to solve the above problems, the object of the present invention is to provide a drainage structure of a vehicle air conditioning system that can smoothly discharge the moisture accumulated in the blowing chamber even when the air suction action of the blowing fan. There is.

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 moisture backflow by smoothly discharging moisture accumulated in the blower 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 a drainage structure of a vehicle air conditioning system including a drain passage for communicating the blower chamber and the drain port so as to discharge to the exhaust passage, the inner passage and the drain passage of the blower to supply a part of the blower discharge air to the drain passage side It characterized in that it further comprises a bypass passage for communicating with.

Preferably, the apparatus may further include a guide unit installed at an inlet of the bypass passage to collect air blown from the blower into the bypass passage.

The bypass passage may be formed to extend along the flow direction of the bypassed air.

The blower includes a two-way suction fan, and the two-way suction fan includes an upper first fan part and a lower second fan part. After each suction of the lower air, the suctioned air is characterized in that for blowing the inner passage.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the drainage structure of the vehicle air conditioning system according to the present invention will be described in detail.

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

First, as shown in FIG. 2, the drainage structure according to the present invention includes a drain hole 100 formed on the bottom surface 10a below the evaporator 30, and a bottom surface 12a of the blower chamber 12. It is provided with a drain passage 110 for connecting the drain port (100).

The drain 100 discharges the condensed water falling from the surface of the evaporator 30 to the outside of the air conditioning case 10.

The drain passage 110 has an inlet 112 in communication with the bottom surface 12a of the blower chamber 12, an outlet 114 in communication with the drain hole 100, and has a bottom surface ( Water collected in 12a) is drained to the drain hole 100. The drain passage 110 discharges the water introduced into the blower chamber 12 to the outside of the air conditioning case 10.

The drainage structure of the present invention includes a bypass passage 120 connecting the discharge port side of the blower chamber 12 and the drain passage 110.

The bypass passage 120 is formed by a pipe installed in the air conditioning case 10, the inlet 122 of which communicates with the discharge port side of the blower chamber 12, and the outlet 124 of the bypass passage 120. In communication with the drain passage (110). Therefore, the discharge port side and the drain passage 110 of the blower chamber 12 are connected to each other.

The bypass passage 120 connects the discharge port side of the blower chamber 12 and the drain passage 110 so that the high pressure air discharged from the blower chamber 12 can be bypassed to the drain passage 110. And, the bypassed high-pressure air can be discharged at a high flow rate along the drain passage (110). In particular, as it is discharged at a high flow rate along the drain passage 110 serves to solve the negative pressure formed in the drain passage (110).

According to the bypass passage 120 having such a configuration, since the negative pressure formed in the drain passage 110 is released during the air intake action of the blower 20, the drain passage generated by the negative pressure of the drain passage 110 ( It prevents the water backflow phenomenon of the 110 and the drain 100 to the source, thereby preventing damage and failure of the blower 20 caused by the water backflow phenomenon.

 Meanwhile, the bypass passage 120 bypasses the air of the blower 20 to the drain passage 110, but is extended along the air flow direction so that the flow rate of the bypassed air is not lowered. . In addition, the bypass passage 120 has a circular cross section to minimize the resistance of the bypassed air.

The bypass passage 120 in the present invention is described as being formed by a pipe installed in the air conditioning case 10, but in some cases, a tunnel type duct integrally formed in the air conditioning case 10. It may be formed by).

Referring again to FIG. 2, the drainage structure of the present invention includes a guide portion 126 provided at the inlet portion 122 of the bypass passage 120.

The guide portion 126 extends from the inlet portion 122 of the bypass passage 120 toward the discharge port side of the blower chamber 12. The guide part 126 serves to collect the high pressure air discharged from the discharge port side of the blower chamber 12 into the bypass passage 120, and thus, the air inflow efficiency introduced into the bypass passage 120. Increase

According to the present invention having such a configuration, since the negative pressure of the water drain passage 110 is released by using the high pressure air discharged from the blower 20, the drain passage caused by the negative pressure of the drain passage 110 Moisture backflow of the 110 and the drain 100 to prevent the source inherently, thus, it is possible to prevent damage and failure of the blower 20 caused by the water backflow phenomenon.

3 and 4, there is shown a view showing a modification of the drainage structure according to the present invention.

The drainage structure of the modification is provided with a drain passage 110 for discharging the water accumulated in the bottom surface 12a of the ventilation chamber 12, the outlet 114 of the drain passage 110 is the evaporator 30 It has a configuration located on the inlet side.

The drainage structure of this modification, since the outlet 114 of the drain passage 110 is located at the inlet side of the evaporator 30, all the air of the blower 20 bypassed to the drain passage 110 is evaporator 30 The air of the blower 20 is not reduced in volume as all the air of the blower 20 bypassed to the drain passage 110 is introduced back into the evaporator 30.

Meanwhile, the water flowing along the drain passage 110 is drained to the lower bottom surface 10a of the evaporator 30, and the drained water is discharged to the outside of the air conditioning case 10 through the drain hole 100.

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 vehicular air conditioning system according to the present invention, after bypassing the high-pressure air discharged from the blower into the drainage passage, the negative pressure of the drainage passage is removed by the bypassed high-pressure air. Because of the structure, it is possible to fundamentally prevent the phenomenon of water backflow of the drain passage and the drain opening caused by the negative pressure of the drain passage. Therefore, it is possible to prevent damage and failure of the blower caused by the water backflow phenomenon in advance.

Claims (4)

In order to discharge the condensed water falling from the evaporator 30, the drain port 100 formed in the air conditioning case 10 and the water introduced into the blower 20 from the blower chamber 12 to the drain hole 100. In the drainage structure of the vehicle air conditioning system including a drain passage 110 for communicating the blower chamber 12 and the drain 100 so as to discharge, It further includes a bypass passage 120 for communicating the inner passage 15 of the blower 20 and the drain passage 110 to supply a portion of the discharge air to the blower 20 to the drain passage 110 side. Drainage structure of a vehicle air conditioning system, characterized in that. The method of claim 1, And a guide part 126 installed in the inlet part 122 of the bypass path 120 to collect the air blown from the blower 20 into the bypass path 120. Drainage structure of vehicle air conditioning system. The method of claim 1, The bypass passage 120 is formed to extend along the flow direction of the bypassed air, the drainage structure of the vehicle air conditioning system. The method according to any one of claims 1 to 3, The blower 20 includes a bidirectional suction type blower fan 22, and the bidirectional suction type blower fan 22 includes an upper first fan part 22a and a lower second fan part 22b. The first and second fan portions 22a and 22b respectively suck upper air and lower air of the blower chamber 12, and then blow the sucked air into the inner passage 15. Drainage structure.

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