KR101222511B1 - Air conditioner for vehicles - Google Patents

Abstract

The present invention relates to a vehicle air conditioner, and more particularly, by having a cooler in front of or behind a heater core having a flow control valve, the cooling air in the coolant in the heater core and the coolant in the cooler when the air conditioner is operated. When the air conditioner is turned off due to the compressor stop, and the temperature of the air discharged from the air conditioning case is rapidly increased by the coolant and the coolant, the performance is improved and the discomfort of the passenger can be prevented. It relates to an air conditioner.

In the present invention, the air inlet 111 is formed on the inlet side and the air-conditioning case 110 is formed with a plurality of air outlets on the outlet side; In the vehicle air conditioning apparatus including an evaporator 101 and a heater core 102 installed on the air passage inside the air conditioning case 110 at a predetermined interval from each other, a heater core on one side of the heater core 102 A flow control valve 107 is provided to intercept the cooling water supplied to the 102, and the front or rear side of the heater core 102 is provided with a cooler 120 filled with a coolant therein, the heater when operating the air conditioner The coolant in the core 102 and the coolant in the cooler 120 accumulate cold air and prevent the temperature of the discharged air from being rapidly increased by the coolant and coolant that are cooled when the air conditioner is turned off.

 Air Conditioning Units, Heater Cores, Accumulators, Flow Control Valves, Bypass Doors

Description

TECHNICAL FIELD [0001] The present invention relates to an air conditioner,

The present invention relates to a vehicle air conditioner, and more particularly, by having a cooler in front of or behind a heater core having a flow control valve, the cooling air in the coolant in the heater core and the coolant in the cooler when the air conditioner is operated. When the air conditioner is turned off due to the compressor stop, and the temperature of the air discharged from the air conditioning case is rapidly increased by the coolant and the coolant, the performance is improved and the discomfort of the passenger can be prevented. It relates to an air conditioner.

Generally, the air conditioner for a vehicle is an automobile interior which is installed for the purpose of securing the front and rear view of the driver by removing the casting which is to be cooled or heated in the summer or winter season, or in case of rain or windshield during rainy or winter season Such an air conditioner is usually equipped with a heating device and a cooling device at the same time, and selectively introduces outside air or indoor air, and then the air is heated or cooled to blow air into the inside of the vehicle.

According to the independent structure of the blower unit, the evaporator unit, and the heater core unit, the air conditioner includes a three piece type in which the three units are independently provided, and an evaporator unit and the heater core unit in the air conditioning case. It can be divided into semi-center type (Central Center type) that is built in the air blower unit is provided as a separate unit, and the center mounting type (Center Mounting Type) that all three units are built in the air conditioning case.

1 shows the semi-center type air conditioner, in which the air inlet 11 is formed at the inlet side, and the defrosting is controlled by the mode door 16 at the outlet side. An air conditioning case 10 provided with a vent 12a, a face vent 12b, and floor vents 12c and 12d; An air blower (not shown) connected to the air inlet 11 of the air conditioning case 10 to blow indoor air or outdoor air; An evaporator (2) and a heater core (3) embedded in the air conditioning case (10); The opening of the cold air passage P1 which is installed between the evaporator 2 and the heater core 3 and bypasses the heater core 3 and the warm air passage P2 which passes through the heater core 3, And a temperature control door 15 for controlling the temperature.

In addition, a guide wall 17 is formed between the rear side of the heater core 3 and the floor vents 12c and 12d to partition each other. Here, the floor vents 12c and 12d are separated into a front seat vent 12c and a rear seat vent 12d.

According to the vehicle air conditioner 1 configured as described above, when the maximum cooling mode is operated, the temperature control door 15 opens the cold air passage P1 and closes the hot air passage P2. do. Accordingly, the air blown by the blower (not shown) is exchanged with the refrigerant flowing through the evaporator 2 while passing through the evaporator 2 to be changed to cold, and then the mixing chamber (P1) through the cold air passage P1. It flows toward the mixing chamber (MC), and is then discharged to the vehicle interior through the vent (12a ~ 12d) that is opened according to the predetermined air conditioning mode, thereby cooling the vehicle interior.

In addition, when the maximum heating mode is activated, the temperature control door 15 closes the cold air passage P1 and opens the hot air passage P2. Accordingly, the air blown by the blower not shown is heat exchanged with the coolant flowing through the inside of the heater core 3 while passing through the heater core 3 through the hot air passage (P2) after passing through the evaporator (2) After changing to warmth, the liquid flows toward the mixing chamber MC, and is then discharged into the vehicle interior through the vents 12a to 12d opened according to a predetermined air conditioning mode, thereby heating the vehicle interior.

When the cooling mode other than the maximum cooling mode, that is, the 1/2 cooling mode is operated, the temperature control door 15 is rotated to a neutral position, so that the cooling air passage P1 with respect to the mixing chamber MC. And open all of the warm air passages (P2). Therefore, after the cool air passed through the evaporator 2 and the warm air passed through the heater core 3 are mixed by flowing toward the mixing chamber MC, the vents 12a to 12d are opened to the vehicle interior through the air conditioning mode. Discharged.

On the other hand, in recent years, in order to protect the environment and improve fuel efficiency of a vehicle engine, a vehicle (eg, a vehicle that runs economically, such as a hybrid vehicle) that automatically stops the engine at a stop such as waiting for a traffic signal has been put into practical use.

However, the compressor (not shown) constituting the refrigeration cycle in the air conditioning apparatus 1 is generally driven by a vehicle engine. In the above-described economical vehicle, the compressor is also stopped and the air conditioner is turned off whenever the engine is stopped. In the summer, the temperature of the cooling evaporator 2 is increased, and the temperature of the air discharged into the vehicle interior is also rapidly increased, thereby causing discomfort to the occupants.

In order to solve the above problem, as illustrated in FIG. 1, the cooler 4 is installed at the rear side of the evaporator 2, but in this case, the air cooled in the evaporator 2 in the initial cooling mode is stored in the cooler 4. ), There is a problem in that the maximum cooling speed is lowered due to the increase in air temperature, and when the air conditioner is turned off due to the stop of the compressor when the vehicle is stopped, the discharge temperature rises only depending on the cooler 4 to alleviate the increase in discharge temperature. .

An object of the present invention for solving the above-mentioned problems is to provide a cooler in front or rear of the heater core having a flow control valve, so that the cold air through the coolant in the heater core and the coolant in the cooler when the air conditioner is operating. When the air conditioner is turned off and the air conditioner is turned off due to the compressor stopping, the temperature of the air discharged from the air conditioning case by the coolant coolant and the coolant is prevented from rising rapidly, thereby improving the performance and preventing the discomfort of the passenger. To provide a device.

The present invention for achieving the above object, the air inlet is formed on the inlet side and the air outlet case formed with a plurality of air outlets on the outlet side; In a vehicle air conditioning apparatus including an evaporator and a heater core installed at a predetermined interval on the air passage inside the air conditioning case, a flow control valve for intermitting the coolant supplied to the heater core is provided on one side of the heater core. The front or rear side of the heater core is provided with a cooler filled with a coolant therein, the coolant in the heater core and the coolant in the cooler cools the cold air when the air conditioner is operating, and the coolant and coolant cools off when the air conditioner off It is characterized in that the discharge air temperature is prevented from rising sharply.

The present invention provides a cold storage device in front of or behind a heater core having a flow control valve, thereby cooling the cold air through the coolant in the heater core and the cold storage material in the cooler when the air conditioner is operated, and when the air conditioner is turned off due to the compressor stopping. This prevents the temperature of the air discharged from the air-conditioning case from rising rapidly by the coolant and the coolant, which improves the performance when the air conditioner is turned off, and reduces the cost by reducing the size of the cooler compared to the prior art. In addition, the discomfort of the occupants can be prevented.

In addition, some of the air cooled in the evaporator in the initial cooling mode passes through the heater core and the cooler, but some bypass the heater core through the bypass passage, thereby improving the maximum cooling efficiency.

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

Repeated description of the same configuration and operation as in the prior art will be omitted.

2 is a cross-sectional view showing a cooling mode in the vehicle air conditioner according to the present invention, Figure 3 is a cross-sectional view showing the air conditioner off when the compressor stops in the vehicle air conditioner according to the present invention, Figure 4 is a vehicle air conditioning according to the present invention Figure 5 is a cross-sectional view showing the heating mode in the device, Figure 5 is a perspective view showing a case in which the cooler is formed integrally on the rear side of the heater core in the vehicle air conditioner according to the present invention, Figure 6 is a vehicle air conditioner according to the present invention 7 is a cross-sectional view showing a case in which the cooler is integrally formed at the rear side of the heater core, and FIG. 7 is a cross-sectional view showing the case in which the cooler is integrally formed at the front side of the heater core in the vehicle air conditioner according to the present invention. In the vehicle air conditioner according to the present invention shows a case in which the cooler is configured as a separate type on the rear side of the heater core. A cross-sectional view.

As shown, the vehicle air conditioner 100 according to the present invention, the air inlet 111 is formed on the inlet side and the air conditioning case 110 is formed with a plurality of air outlet on the outlet side, the air conditioning case 110 inside It comprises an evaporator 101 and the heater core 102 which are installed at a predetermined interval on the air passage of the.

The air inlet 111 of the air conditioning case 110 is provided with an air blower (not shown) for blowing indoor air or outdoor air.

The plurality of air discharge ports formed at the outlet side of the air conditioning case 110 may include a defrost vent 112a for discharging air toward the windshield of the vehicle and a face vent for discharging air toward the face of the front occupant. 112b and a floor vent 112c for discharging air toward the occupant's foot are formed.

In addition, the defrost vent 112a, the face vent 112b, and the floor vent 112c are opened and closed by the mode door 113, respectively.

In the drawings, only the case in which the center pivot type mode door 113 in which the plates on both sides of the rotating shaft are rotated is installed, but various door shapes may be installed.

In addition, the mode doors 113 are connected to a cam (not shown) or a lever (not shown) which is directly driven through an actuator (not shown) installed on the outer surface of the air conditioning case 110 or driven by an actuator, and rotates. In operation, it adjusts the opening of each vent.

On the other hand, each of the vent (112a ~ 112c) is provided with a duct (not shown) to communicate with a specific part of the interior of the vehicle to discharge the air discharged through each vent to the center side of the vehicle interior and both left and right sides, respectively. Done.

In addition, one side of the heater core 102 is provided with a flow control valve 107 to control the cooling water supplied to the heater core (102).

The flow control valve 107 is connected to the inlet and outlet pipes 106a and 106b of the heater core 102 drawn out of the air conditioning case 110 and the connection housing 108 connecting the cooling water line 109 of the engine. It is installed inside.

Therefore, in the heating mode, the hot coolant that is heated and supplied from the engine by opening the inlet and outlet pipes 106a and 106b through the flow control valve 107 flows into the heater core 102 through the inlet pipe 106a. The hot coolant introduced to the heater core 102 heats the air passing through the heater core 102 and then returns to the engine through the outlet pipe 106b.

At this time, the flow control valve 107 may adjust the temperature by controlling the flow rate of the cooling water supplied to the heater core 102 through the inlet pipe (106a).

In the cooling mode, by closing the inlet and outlet pipes 106a and 106b through the flow control valve 107, the hot coolant supplied by heating from the engine does not flow into the heater core 102 and bypasses and returns to the engine again. Done. At this time, the cooling water filled in the heater core 102 does not flow but is stagnant.

On the other hand, the coolant stagnated in the heater core 102 when the air conditioner is operating (in the cooling mode) is used as the coolant.

As such, in the heating mode through the flow control valve 107, the hot water is supplied to the heater core 102 to perform the heating role, and in the cooling mode, the cooling water supplied to the heater core 102 is blocked. .

Meanwhile, the structure of the heater core 102 will be briefly described. The upper and lower header tanks 103 between the upper and lower header tanks 103 spaced apart from each other and the upper and lower header tanks 103 are spaced apart from each other. It consists of a plurality of tubes (104) installed to communicate with, and a heat radiation fin (105) provided between the plurality of tubes (104).

Here, the upper and lower header tanks 103 are composed of a tank 103a and a header 103b for sealing an opening of the tank 103a, respectively.

In addition, the inlet and outlet pipes 106a and 106b are connected to upper and lower header tanks 103 of the heater core 102.

And, the front or rear side of the heater core 102 is provided with a cooler 120 filled with a coolant therein.

Here, the cool storage unit 120 is integrally formed on the front or rear side of the heater core 102 as shown in Figs. 5 to 7, or separate on the front or rear side of the heater core 102 as shown in FIG. It can be configured to be separated (in FIG. 8 is shown only when the cold storage 120 is configured separately separated on the rear side of the heater core)

In addition, the cooler 120 includes a plurality of tubes 122 connecting upper and lower header tanks 121 spaced apart from each other, and the upper and lower header tanks 121 to communicate with each other, and the plurality of tubes. The heat dissipation fins (not shown) interposed between the 122 and the tank 121 and the tube 122 is filled with a heat storage material (not shown) is sealed.

Here, the upper and lower header tanks 121 are composed of a tank 121a and a header 121b sealing the opening of the tank 121a, respectively.

The cooler 120 has a structure similar to that of the heater core 102, but the inlet and outlet pipes 106a and 106b are not installed.

In addition, when the cooler 120 and the heater core 102 are integrally formed, the upper and lower header tanks 121 of the cooler 120 are filled with the cooling water of the heater core 102. It is formed integrally with the header tank 103.

That is, as illustrated in FIGS. 6 and 7, the single plate is bent to form the tank 121a on the cold storage 120 side and the tank 103a on the heater core 102 side, and then the tank (the tank on the cold storage 120 side) By sealing the openings of the 121a and the tank 103a on the heater core 102 side with the single headers 103b and 121b, the heat storage cooler 120 and the heater core 102 can be integrally formed.

At this time, the cold storage 120 side tank 121a and the heater core 102 side tank 103a are integrally formed by bending into a single plate, but are configured to be spaced apart from each other by a predetermined interval.

In addition, the heat storage cooler 120 side header tank 121 and the heater core 102 side header tank 103 may be integrally welded.

In addition, a bypass passage 131 is formed in the upper portion of the heater core 102 such that a part of the air passing through the evaporator 101 bypasses the heater core 102 in the air conditioning case 110. In the bypass passage 131, a bypass door 130 is installed to adjust the opening degree.

The bypass door 130 selectively opens and closes the bypass passage 131 according to the condition of the vehicle.

That is, when the bypass passage 131 is opened through the bypass door 130 in the initial cooling mode, some of the air cooled in the evaporator 101 passes through the heater core 102 and the cooler 120. Some may improve the maximum cooling fastness by bypassing the heater core 102 through the bypass passage 131.

As described above, in the present invention, the coolant stagnated in the heater core 102 and the coolant encapsulated in the cooler 120 accumulate cold air, and cool the coolant and coolant when the air conditioner is turned off when the compressor is stopped. As a result, the temperature of the air discharged from the air conditioning case 110 may be prevented from rising rapidly, thereby improving performance when the air conditioner is turned off, and as a result, the size of the cooler 120 may be reduced compared to the related art, thereby reducing the cost. In particular, it is possible to further prevent the discomfort of the occupant by preventing the air whose temperature rises sharply to be discharged toward the face of the occupant through the face vent 112b.

In addition, when the storage cooler 120 is configured to be integrally or separated from the rear side (downstream side) of the heater core 102, when the air conditioner is turned off while the compressor is stopped due to the engine stop when the vehicle waits for the air, Since the cooling water inside the heater core, which has a relatively higher heat capacity than the storage cooler, passes first, the cooling effect is further improved and the cooling effect can be continued.

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

First, in the cooling mode according to the operation of the air conditioner (see FIG. 2),

In the cooling mode, the flow control valve 107 completely blocks the cooling water supplied to the heater core 102, and the bypass door 130 opens the bypass passage 131.

Accordingly, the air introduced through the air inlet 111 of the air conditioning case 110 by the blower is cooled in the process of passing through the evaporator 101, and some of the cold air is heated by the bypass passage 131. Bypassing the core 102 and the cooler 120, and some pass through the heater core 102 and the cooler 120, through the air discharge opening opened by the mode door 113 according to the air conditioning mode. It is discharged into the vehicle compartment and cooled.

In the above process, the coolant cooled while passing through the evaporator 101 passes through the heater core 102 and the cooler 120, and the coolant stagnated in the heater core 102 and the shaft encapsulated in the cooler 120. The coolant is cooled, and the coolant and the coolant are cooled.

When the engine of the vehicle is stopped while waiting for a signal while driving in the air conditioner operating state as described above, the air conditioner is turned off while the compressor is stopped. In this case, since the temperature of the evaporator 101 rises, it passes through the evaporator 101. Although the temperature of one air may rise rapidly, in this case, as shown in FIG. 3, the air passing through the evaporator 101 is closed by the bypass passage 131 through the bypass door 130. And it passes through the cold storage 120.

Therefore, since the temperature of the air rising while passing through the evaporator 101 is lowered again by the coolant and the coolant of the heater core 102 and the cooler 120, the temperature of the air discharged into the vehicle interior is drastically reduced. It can prevent the rise, thereby preventing the discomfort of the occupants.

Next, in the heating mode (see FIG. 4), the flow control valve 107 opens the inlet and outlet pipes 106a and 106b of the heater core 102 to transfer the hot coolant heated from the engine to the heater core 102. The bypass door 130 closes the bypass passage 131.

Accordingly, air introduced through the air inlet 111 of the air conditioning case 110 by the blower passes through the evaporator 101, and the air passing through the evaporator 101 passes through the heater core 102. After being heated through heat exchange with the heater core 102 in the process, it is discharged into the vehicle interior through the air discharge port opened by the mode door 113 according to the air conditioning mode is heated.

As described above, in the present invention, a configuration in which the air cooler 120 is integrally or separately installed on the front or rear side of the heater core 102 having the flow control valve 107 is applied to a semi-center type air conditioner. Although only the case has been described, the present invention is not limited thereto, and can be applied to all the air conditioners such as a center mounting type air conditioner, a three-piece type air conditioner, and an independent left and right independent air conditioner in the same manner, and the same effect can be obtained.

1 is a cross-sectional view showing a conventional vehicle air conditioner,

2 is a cross-sectional view showing a cooling mode in the vehicle air conditioner according to the present invention;

3 is a cross-sectional view showing the air conditioner off when the compressor stops in the vehicle air conditioner according to the present invention;

4 is a cross-sectional view showing a heating mode in the vehicle air conditioner according to the present invention;

5 is a perspective view illustrating a case in which a cooler is integrally formed on a rear side of a heater core in a vehicle air conditioner according to the present invention;

6 is a cross-sectional view showing a case in which a cooler is integrally formed on the rear side of the heater core in the vehicle air conditioner according to the present invention;

7 is a cross-sectional view showing a case in which a cooler is integrally formed on the front side of the heater core in the vehicle air conditioner according to the present invention;

8 is a cross-sectional view showing a case in which the cooler is configured as a separate type on the rear side of the heater core in the vehicle air conditioner according to the present invention.

<Explanation of symbols for the main parts of the drawings>

100: air conditioner 101: evaporator

102: heater core 103,121: header tank

104,122: Tube 105: Heat dissipation fin

106a: inlet pipe 106b: outlet pipe

107: flow control valve 108: connecting housing

109: cooling water line

110: air conditioning case 111: air inlet

112a: defrost vent 112b: face vent

112c: floor vent 113: mod door

120: cold storage

130: bypass door 131: bypass passage

Claims (6)

An air inlet 111 is formed at the inlet side and a plurality of air outlets are formed at the outlet side; In the air conditioner for a vehicle comprising an evaporator 101 and a heater core 102 are provided at a predetermined interval from each other on the air passage inside the air conditioning case 110, One side of the heater core 102 is provided with a flow control valve 107 to control the cooling water supplied to the heater core 102, The front or rear side of the heater core 102 is integrally configured with a cooler 120 filled with a coolant therein, While the coolant in the heater core 102 and the coolant in the cooler 120 accumulate cold air when the air conditioner is operated, and the discharge air temperature is prevented from rapidly rising by the coolant and coolant that are cooled when the air conditioner is turned off, The cooler 120 is a plurality of tubes 122 for connecting the upper and lower header tank 121 and the upper and lower header tank 121 in communication with each other at regular intervals, and the plurality of tubes 122 A heat dissipation fin interposed between the) and the coolant to be filled in the tank 121 and the tube 122, The upper and lower header tanks 121 of the cooler 120 are integrally formed with the upper and lower header tanks 103 in which the cooling water of the heater core 102 is filled. delete An air inlet 111 is formed at the inlet side and a plurality of air outlets are formed at the outlet side; In the air conditioner for a vehicle comprising an evaporator 101 and a heater core 102 are provided at a predetermined interval from each other on the air passage inside the air conditioning case 110, One side of the heater core 102 is provided with a flow control valve 107 to control the cooling water supplied to the heater core 102, On the front or rear side of the heater core 102 is configured to separate the storage cooler 120 is filled with the coolant inside therein, While the coolant in the heater core 102 and the coolant in the cooler 120 accumulate cold air when the air conditioner is operated, and the discharge air temperature is prevented from rapidly rising by the coolant and coolant that are cooled when the air conditioner is turned off, The cooler 120 is a plurality of tubes 122 for connecting the upper and lower header tank 121 and the upper and lower header tank 121 in communication with each other at regular intervals, and the plurality of tubes 122 A heat dissipation fin interposed between the) and the air conditioner for the vehicle, characterized in that made of a coolant filled in the interior of the tank (121) and the tube (122). delete delete The method of claim 1, Inside the air conditioning case 110, a bypass passage 131 is formed in the upper portion of the heater core 102 so that the air passing through the evaporator 101 bypasses the heater core 102, the bypass The passage 131 is a vehicle air conditioner, characterized in that the bypass door 130 is installed for adjusting the opening degree.

Images