KR20100134435A - Air conditioner for vehicles - Google Patents

Abstract

PURPOSE: An air conditioning device for a vehicle is provided to reduce a pressure loss in a hose connecting an aspirator and an in-car sensor unit by integrally forming the aspirator in a support unit. CONSTITUTION: An air conditioning device for a vehicle comprises a heat exchanging unit(40), a blower unit(10), and a supporter(100). The heat exchanging unit has an evaporator and a heater core installed inside an air conditioning case(40a). The blower unit has a blower(35). The blower is installed inside a blower case(10a) installed in one side of the air conditioning case. The supporter connects the heat exchanging unit and the blower unit. An aspirator is integrally formed in the supporter and inhales indoor air of a vehicle.

Description

Air conditioner for vehicles

The present invention relates to an air conditioner for a vehicle, and more particularly, in order to assemble a heat exchanger unit and a blower unit, a support unit for connecting and supporting each unit is formed in the form of a duct and an aspirator is integrally formed on the support unit. By inhaling the vehicle's indoor air by using the negative pressure according to the blower's suction and the static pressure in the heat exchanger unit at the same time, the air suction performance is improved, so that the in-car sensor can obtain sufficient wind speed for detecting the room temperature even at the low operating voltage of the blower. The air discharged from the aspirator and the support part can be prevented from entering the interior of the vehicle to solve the discomfort of the passenger and the overall structure is simple to reduce the manufacturing cost, and the support part and the aspirator are integrally formed. Therefore, the present invention relates to a vehicle air conditioner, which is advantageous in reducing assembly labor and securing assembly space.

The vehicle air conditioner is a vehicle interior that is installed for the purpose of securing the driver's front and rear view by removing the frost, which is caught in the windshield during the rainy season or the winter, or by cooling or heating the interior of the car during the summer or winter. In general, the air conditioner is equipped with a heating system and a cooling system at the same time to selectively introduce the outside air or bet, and then heat or cool the air and blow it into the interior of the vehicle to cool, heat or ventilate the interior of the vehicle.

1 is a configuration diagram showing the vehicle air conditioner as described above, FIG. 2 is a perspective view showing an example of a semi-center type air conditioner of the air conditioner, Figure 3 is a cross-sectional view showing the air conditioning case of FIG. As described above, the air conditioner 1 is connected to the air conditioning case 40a and the blower case 10a having internal and external air inlets 21 and 22 formed thereon, and the internal and external air inlets 21. In order to forcely blow the internal and outdoor air introduced through the internal and external air conversion doors 23 and the internal and external air inlets 21 and 22 to be selectively opened and closed). A blower unit 10 including a blower 35;

An air inlet 43 is formed at the inlet side so that the air blown from the blower unit 10 is introduced, and the air conditioner case 40a having a plurality of air outlets 44 opened and closed by the mode door 46 at the outlet side; The heat exchanger unit 40 includes an evaporator 41 and a heater core 42 that are sequentially installed at predetermined intervals in the air conditioning case 40a.

Between the evaporator 41 and the heater core 42 is installed a temperature control door 45 for controlling the temperature by adjusting the amount of mixing the cold air passing through the evaporator 41 and the warm air passing through the heater core 42. It is.

Accordingly, the indoor or outdoor air of the vehicle is selectively introduced by the blower 35 according to the selection of opening and closing of the indoor and outdoor air conversion doors 23, and the air is passed through the evaporator 41 along the air conditioning case 40a. After the heater core 42 is selectively passed through the operation of the temperature control door 45 to cool or heat, the cooled or heated air is subjected to an air conditioning mode (vent mode, bi-level mode, floor mode, mix mode). , According to the selection of opening and closing of the plurality of mode doors 46 according to the defrost mode, branched to each branch duct (not shown) and discharged to each part of the vehicle interior, thereby cooling, heating, or ventilating the vehicle interior.

And, as shown in Figure 2, one side of the air conditioning case 40a (ASPIRATOR) 60 using a venturi action for the purpose of forcibly inhaling the vehicle indoor air to measure the temperature and humidity of the vehicle interior air. Is installed.

The aspirator 60 is installed to communicate with the interior of the air conditioning case 40a, and a venturi passage (not shown) is formed in which a passage is reduced so that a venturi action occurs. A suction pipe 61 is provided for this purpose. The inlet of the suction pipe 61 communicates with the vehicle interior and the outlet is inserted into the aspirator 60.

Therefore, a venturi action occurs in the process of passing the air drawn out from the air conditioning case 40a by the positive pressure acting in the air conditioning case 40a through the inside of the aspirator 60, and thus the suction pipe 61 ) To force the air inside the vehicle.

At this time, through the hose (not shown) inlet sensor unit (not shown) connected to the suction pipe 61 to measure the temperature and humidity of the indoor air.

On the other hand, for the assembly of the heat exchanger unit 40 and the blower unit 10, a support unit 70 for connecting and supporting each unit is installed.

However, when only the positive pressure in the air conditioning case 40a is used, it is difficult to obtain a sufficient wind speed through the aspirator 60 because the static pressure is low, and eventually the suction wind speed of the in-car sensor unit through the suction pipe 61 is low, thereby reducing the room temperature. There is a problem that is difficult to detect. In particular, when the number of stages (operating voltage) of the blower 35 is low, it is more difficult to obtain a desired wind speed.

In addition, when the aspirator 60 is used, the air inside the air conditioning case 40a is thrown away by the aspirator 60 into the vehicle interior.

In addition, since the aspirator 60 as well as the support unit 70 must be installed in a narrow space between the heat exchanger unit 40 and the blower unit 10, the number of assembly operations increases and disadvantages in securing an assembly space are also caused. there was.

An object of the present invention for solving the above-mentioned problems is to form a support for connecting each unit for the assembly of the heat exchanger unit and the blower unit in the form of a duct and integrally formed an aspirator on the support. By using the negative pressure according to the blower suction and the static pressure in the heat exchanger unit at the same time to suck the vehicle indoor air, the air suction performance is improved, so that the in-car sensor can obtain sufficient wind speed for detecting the room temperature even at the low operating voltage of the blower. In addition, the air discharged from the aspirator and the support part is prevented from entering the interior of the vehicle to solve the discomfort of the passengers, and the overall structure is simple to reduce the manufacturing cost, and thus the support part and the aspirator are integrally formed. It is to provide a vehicle air conditioner which is advantageous in reducing assembly labor and securing assembly space.

The present invention for achieving the above object is a heat exchanger unit provided with an evaporator and a heater core inside the air conditioning case, and a blower is installed inside the blower case installed in communication with one side of the air conditioning case to the inside of the air conditioning case In the vehicle air conditioner comprising a blower unit for blowing air to the furnace and the heat exchanger unit and the support unit for supporting each unit interconnected between the blower unit, the support unit is in communication with the air conditioning case and the blower case It is formed in the form of a duct, and the support portion is characterized in that the aspirator (ASPIRATOR) for generating the venturi action to suck the air in the vehicle is integrally provided.

The present invention, the support unit for connecting each unit for the assembly of the heat exchanger unit and the blower unit in the form of a duct and the support unit integrally formed with an aspirator to the negative pressure according to the blower suction in the blower unit and the heat exchanger unit By simultaneously using the positive pressure inside the vehicle to suck the indoor air, the air suction performance is improved, so that the in-car sensor unit can obtain sufficient wind speed and air volume for sensing the indoor temperature even at a low operating voltage (single) of the blower.

In addition, since the aspirator is integrally formed with the support part, the aspirator may be installed close to the inca sensor part, thereby reducing the pressure drop lost at the hose side connecting the aspirator and the inca sensor part, which is advantageous in performance.

In addition, the air discharged from the support and the aspirator is introduced into the blower case without being thrown into the vehicle interior, thereby solving the discomfort of passengers that may occur when discarded into the interior of the vehicle.

In addition, the overall structure of the aspirator integrally formed with the support is easy to manufacture and the manufacturing cost is reduced.

In addition, since the aspirator is integrally formed on the support for connecting and supporting the heat exchanger unit and the blower unit, the assembly operation is easy and the assembly space is advantageous, thereby facilitating assembly.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Figure 4 is a perspective view showing a vehicle air conditioner according to the present invention, Figure 5 is a cross-sectional view showing the air conditioning case of Figure 4, Figure 6 is a cross-sectional view taken along the line AA of Figure 4, Figure 7 is a support and aspirator in Figure 6 8 is an enlarged cross-sectional view illustrating a case in which an extension tube is formed on the inner wall surface of the blower case in FIG. 7, and FIG. 9 is an enlarged cross-sectional view illustrating a case in which the outlet of the extension tube is formed in the opposite direction of the blower in FIG. 8. to be.

As shown, the vehicle air conditioner according to the present invention is composed of a heat exchanger unit 40 and a blower unit 10,

First, in the heat exchanger unit 40, an air inlet 43 is formed to allow air to enter the inlet side, and a plurality of air outlets 44 are formed at the outlet side, and the air inlet 43 and each air outlet An air conditioner case 40a having an air passage therein so as to communicate 44 with the evaporator 41 and a heater core 42 sequentially installed at predetermined intervals on the air passage of the air conditioning case 40a; Is installed between the evaporator 41 and the heater core 42, the cold air passage bypassing the heater core 42 and the opening degree of the hot air passage passing through the heater core 42 is adjusted to mix the cold air and warm air Opening and closing the air outlets 44 to adjust the amount of the temperature control door 45, and through the evaporator 41 to supply the coarse air selectively through the heater core 42 to a specific discharge port in the vehicle interior Multiple mode doors (4 6) consists of.

Here, the temperature control door 45 and the mode door 46 is connected to a mode cam (not shown) installed on the outside of the air conditioning case 40a to perform temperature control and various air conditioning modes. Here, the mode cam is connected to an actuator (not shown) that is operated by being supplied with power.

That is, the temperature control door 45 and the mode door 46 is operated in conjunction with the operation switch as the user operates the controller (not shown) for controlling the air conditioner of the instrument panel.

In addition, the blower unit 10 is installed in communication with the air inlet 43 of the air conditioning case 40a, and the inside and the outside air inlets 21 and 22 are formed at the upper side to introduce internal and external air. The blower case 10a and the inside and outside air conversion doors 23 which are rotatably installed in the blower case 10a to open and close the inside and outside air inlets 21 and 22, and the blower case 10a. ) Is installed inside the blower 35 for forcibly blowing the internal and external air introduced through the internal and external air inlets 21 and 22 to the air conditioning case 40a.

Here, the air filter 25 is installed in the upstream space of the blower 35 inside the blower case 10a to remove foreign substances contained in the internal and external air flowing through the internal and external air inlets 21 and 22. .

In addition, the support unit 100 for interconnecting and supporting each unit is installed for assembling the heat exchanger unit 40 and the blower unit 10.

The support part 100 is formed in the form of a duct that is empty inside so that the air conditioning case 40a and the blower case 10a communicate with each other.

At this time, the communication holes 40b and 10b are formed on the side surfaces of the air conditioning case 40a and the blower case 10a facing each other, and the circumferences of the communication holes 40b and 10b are also formed. Coupling portions 40c and 10c are formed at the end portions of the supporting portion 100 so as to be inserted into the ends.

On the other hand, although not shown in the drawing, the support part 100 is divided into two, one is formed integrally on the side of the air conditioning case 40a, and the other is formed integrally on the side of the blower case 10a and then divided It may be configured by assembling each of the support parts 100.

In addition, the inlet (100a) of the support portion 100 is installed to communicate with the downstream region with respect to the evaporator 41 in the interior of the air conditioning case (40a), more preferably, the evaporator 41 and the heater core The air passed through 42 is installed to communicate with the mixing zone MC.

The outlet 100b of the support part 100 is installed to communicate with the upstream region of the blower 35 of the blower case 10a.

Therefore, when the blower 35 is operated, the inside of the air conditioning case 40a is caused by the pressure difference between the blower 35 suction negative pressure acting inside the blower case 10a and the positive pressure acting inside the air conditioning case 40a. Some of the air flowing through the support portion 100 is to be sucked into the blower case (10a).

In addition, when the air filter 25 is installed in the upstream area of the blower 35 in the blower case 10a, the outlet 100b of the support part 100 communicates with the downstream area of the air filter 25. It is desirable to be.

For reference, when the blower 35 is stopped or the blower 35 is operated at a low voltage (single) in the air inflow mode of the air conditioner, the static pressure inside the blower case 10a increases due to the inflow of air due to the increase in the vehicle speed. The air volume can flow backward from the blower case 10a, which is the outlet 100b side of the support part 100, to the air-conditioning case 40a. In this case, the outlet 100b of the support part 100 is not blown back to the blower 35. The negative pressure is formed between the upstream of the filter and the downstream of the air filter 25.

In addition, in order to further prevent the air in the blower case 10a from flowing back to the air conditioning case 40a through the support unit 100 in accordance with the increase in the static pressure inside the blower case 10a, as shown in FIG. On the inner wall surface of the blower case 10a to which the outlet 100b of 100 is connected in communication, an extension tube 10d extending from the outlet 100b of the support part 100 inward to the blower case 10a is formed to protrude. do.

In this case, the inlet of the extension pipe 10d as shown in FIG. 9 may prevent the noise generated when the blower 35 is operated from entering the vehicle interior through the support part 100 and the aspirator 110. It is preferably formed to face in the opposite direction of the blower 35.

In addition, the support unit 100 is integrally provided with an aspirator 110 that generates a venturi action and sucks air in the vehicle interior.

The aspirator 110 is formed on the venturi passage portion 111 formed by reducing an internal passage of the support portion 100 and an upstream side of the venturi passage portion 111 of the support portion 100. It consists of a suction pipe 112 for communicating the interior of the 100 to suck the indoor air of the vehicle.

The interior of the support part 100 is formed to expand again after passing through the venturi passage part 111 after the passage cross-sectional area is reduced at the site where the venturi passage part 111 is formed.

On the other hand, the inlet of the suction pipe 112 is formed so that the inlet is directly extended to the indoor side to communicate with the interior of the vehicle or in communication with the indoor side by connecting a separate hose (not shown) to the inlet side of the suction pipe 112. You can also

Therefore, a venturi action occurs while the air drawn from the air conditioning case 40a passes through the venturi passage part 111 inside the support part 100, thereby forcibly inhaling the air in the vehicle interior through the suction pipe 112. In this case, the temperature and humidity of the indoor air is measured through an in-car sensor unit (not shown) installed on the hose side communicating with the suction pipe 112.

As such, in order to assemble the heat exchanger unit 40 and the blower unit 10, a support part 100 for connecting and supporting each unit is formed in the form of a duct, and an aspirator 110 is integrated with the support part 100. By inhaling the vehicle indoor air by using the negative pressure according to the blower 35 suction in the blower unit 10 and the positive pressure in the heat exchanger unit 40 at the same time, the air suction performance is improved to lower the operation of the blower 35. Even in the voltage (single), the in-car sensor unit can obtain sufficient wind speed and air volume to detect the room temperature.

FIG. 10 is a graph comparing wind speeds sucked into the suction pipe 112 of the aspirator according to the opening position of the temperature control door in the bend mode of the air conditioner. As shown in the related art, only the positive pressure in the air conditioner case 40a is shown. It can be seen that the wind speed is low, and in the present invention, since the suction negative pressure of the blower 35 and the static pressure in the air conditioning case 40a are used at the same time, the wind speed is greatly increased compared with the conventional art.

In addition, since the aspirator 110 is integrally formed with the support part 100, the aspirator 110 may be installed close to the inca sensor part, thereby reducing the pressure drop lost at the hose side connecting the aspirator 110 and the inca sensor part. It can be reduced, which is advantageous for performance.

In addition, since the air discharged from the support part 100 and the aspirator 110 is introduced into the blower case 10a without being thrown into the vehicle interior, passenger discomfort that may occur when discarded into the interior can be solved.

In addition, since the structure of the aspirator 110 integrally formed with the support part 100 can be easily manufactured and reduce the manufacturing cost, the heat exchanger unit 40 and the blower unit 10 are connected and supported. Since the aspirator 110 is integrally formed in the support part 100 for the purpose of assembly, it is easy to assemble and reduce the assembly labor and to secure the assembly space.

Hereinafter, the operation of the vehicle air conditioner according to the present invention will be described.

First, when the blower 35 is rotated in the blower case 10a by the operation of the vehicle air conditioner, a negative pressure acts on the inside of the blower case 10a, and the suction inlet 21 is caused by the suction force at this time. Alternatively, the inside or outside air is sucked into the blower case 10a through the outside air inlet 22.

Subsequently, the air sucked into the blower case 10a is blown into the air conditioning case 40a while being discharged in the radial direction of the blower 35.

The air blown into the air conditioning case 40a passes through the evaporator 41 and passes through the heater core 42 or bypasses the heater core 42 by the temperature control door 45 according to a cooling and heating mode. It turns into warm or cold. The air, which has been changed to hot or cold air, is discharged to the vehicle interior through the air discharge port 44 opened according to the air conditioning mode, thereby cooling or heating the vehicle interior.

In addition, when the blower 35 is operated, the suction negative pressure of the blower 35 acts on the inside of the blower case 10a and the positive pressure acts on the inside of the air conditioning case 40a. Some of the air inside the case 40a is sucked into the blower case 10a through the support part 100.

At this time, while the air passes through the venturi passage part 111 in the support part 100, a venturi action occurs to force suction of air in the vehicle interior through the suction pipe 112, and thus the suction pipe 112. ) And the in-car sensor unit (not shown) installed in the hose (not shown) in communication with the air to measure the temperature and humidity of the indoor air.

As such, by using the suction negative pressure of the blower 35 and the positive pressure in the air conditioning case 40a at the same time when measuring the room temperature and humidity through the in-car sensor unit, the air suction performance due to the pressure difference is increased, thereby lowering the operating voltage of the blower 35 ( In the singular) it is possible to obtain a sufficient wind speed that the in-car sensor can detect.

1 is a configuration diagram showing a conventional vehicle air conditioner,

2 is a perspective view showing an example of a conventional semi-center type air conditioner;

3 is a cross-sectional view showing an air conditioning case of FIG.

4 is a perspective view showing the vehicle air conditioner according to the present invention;

5 is a cross-sectional view showing an air conditioning case of FIG. 4;

6 is a cross-sectional view taken along the line A-A of FIG.

FIG. 7 is an enlarged cross-sectional view illustrating a support part and an aspirator in FIG. 6;

8 is an enlarged cross-sectional view illustrating a case in which an extension pipe is formed on an inner wall surface of a blower case in FIG. 7;

9 is an enlarged cross-sectional view illustrating a case in which the outlet of the extension pipe is formed in the opposite direction of the blower in FIG. 8;

10 is a graph comparing the wind speed sucked into the aspirator according to the position of the temperature control door.

<Description of Signs of Major Parts of Drawings>

10: blower unit 10a: blower case

10d: extension tube 35: blower

40: heat exchanger unit 40a: air conditioning case

100: support 110: aspirator

111: venturi passage portion 112: suction pipe

Claims (6)

The heat exchanger unit 40 having the evaporator 41 and the heater core 42 installed in the air conditioning case 40a and the blower case 10a installed in communication with one side of the air conditioning case 40a. The blower unit 10 which blows air into the air-conditioning case 40a by installing the blower 35, and the support part which mutually supports each unit between the heat exchanger unit 40 and the blower unit 10. In the vehicle air conditioner comprising a (100), The support part 100 is formed in the form of a duct to communicate the air conditioning case 40a and the blower case 10a with each other, The support unit (100) is characterized in that the aspirator (ASPIRATOR) (110) for generating a venturi action to suck the air inside the vehicle is integrally provided. The method of claim 1, The inlet (100a) of the support portion 100 is installed to communicate with the downstream region with respect to the evaporator 41 in the interior of the air conditioning case (40a), the outlet (100b) blower (35) of the blower case (10a) Vehicle air conditioning apparatus, characterized in that installed to communicate with the upstream area. The method of claim 2, The inlet (100a) of the support portion 100 is installed to communicate with the mixing area (MC) is mixed with the air passing through the evaporator (41) and the heater core (42). The method of claim 2, When the air filter 25 is installed in the upstream area of the blower 35 in the blower case 10a, the outlet 100b of the support part 100 is installed to communicate with the downstream area of the air filter 25. Vehicle air conditioner, characterized in that. The method of claim 2, On the inner wall surface of the blower case 10a to which the outlet 100b of the support part 100 is communicatively coupled, an extension pipe 10d extending the outlet 100b of the support part 100 inward to the blower case 10a is provided. Vehicle air conditioning apparatus, characterized in that formed. The method of claim 1, The aspirator 110 is formed on the venturi passage portion 111 formed by reducing an internal passage of the support portion 100 and an upstream side of the venturi passage portion 111 of the support portion 100. An air conditioning apparatus for a vehicle, comprising: a suction pipe 112 for communicating interior of the vehicle and sucking the vehicle interior air.

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