KR100868272B1 - Heater core for car air-conditioner - Google Patents

Abstract

The present invention relates to a heater core for a vehicle air conditioner, and aims to maximize the heating performance at the initial start / driving time by switching the cooling water flow path according to the temperature of the cooling water.

The disclosed heater core for a vehicle air conditioner includes a first tank 110 having an interior partitioned into first and second chambers 111 and 112, a second tank 120 arranged in parallel with the first tank, and the first tank. And a plurality of tubes 130 connected at both ends to the second tank, a plurality of heat dissipation fins 140 installed between the tubes, and branched from the coolant inlet pipe 150 to the first and second tanks. First and second inflow passages 151 and 152 respectively connected to each other, first and second discharge passages 161 and 162 branched from the coolant discharge pipe 160 and connected to the second tank and the second chamber, respectively, According to the temperature, the second inflow passage, the first and second discharge passages are opened and closed so that the coolant flows in a one-way flow method at the beginning of the startup with low coolant temperature, and the coolant flows in the U-turn mode when the coolant temperature is at a proper level. It comprises a valve means for controlling. As a result, when the coolant is low temperature, the cooling water flow rate may be increased to accelerate initial heating, and when the coolant is an appropriate temperature, the heat exchange area may be increased to increase the heating efficiency.

Heater core, U-turn, one-way flow, valve

Description

Heater Core for Automotive Air Conditioning Units {HEATER CORE FOR CAR AIR-CONDITIONER}

1 and 2 respectively show a heater core for a vehicle air conditioner according to the prior art,

1 is a U-turn heater core,

2 is a heater core of a one-way flow method.

3 is a block diagram of a heater core for a vehicle air conditioner according to the present invention.

4 and 5 are each an operation of the heater core for a vehicle air conditioner according to the present invention.

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

100: heater core, 110,120: tank

111,112 chamber, 113 baffle

130: tube, 140: heat dissipation fin

150: cooling water inlet pipe, 151,152: inflow passage

160: cooling water discharge pipe, 161,162: discharge flow path

V1, V2: valve,

The present invention relates to a heater core for an automotive air conditioner, and more particularly, it is possible to improve the heating performance by allowing the flow path of the coolant to be switched to a method suitable for the coolant temperature among the U-turn / unidirectional flow method according to the coolant temperature. The present invention relates to a heater core for an automotive air conditioner.

In general, the air conditioning system is composed of ventilation system, air conditioning and heating system, and it creates a comfortable environment for the passengers even under various climates and driving conditions, and removes the blur and frost on the windows to secure the driver's watch and operate safely. The purpose is to make it possible.

The heating device heats the air passing through the heater core with the high temperature cooling water flowing inside the heater core and raises it to a high temperature while the high temperature cooling water from the engine passes through the heater core and back to the engine. It is to heat the room by supplying it to the room.

The cooling device heats the air passing through the evaporator while the refrigerant compressed at a high temperature and high pressure in the compressor circulates the condenser, the expansion valve, and the evaporator, thereby lowering the temperature by supplying the low temperature air into the vehicle. It is to cool the inside of the car.

The heater core is divided into a U-turn method and a one-way flow method according to the cooling water flow method, and the basic configuration of the heater core is shown in FIGS. 1 and 2 regardless of the method. As shown, the first and second tanks 1 and 2 are arranged side by side between the first and second tanks 1 and 2, and both ends thereof are respectively connected to the first and second tanks 1 and 2, respectively. It consists of a plurality of tubes 3 to be inserted and connected, and a plurality of heat dissipation fins 4 respectively installed between the tubes 3.

In this structure, in the case of the U-turn method according to the cooling water flow method, as shown in FIG. , 1b), and the cooling water inflow pipe 6 and the discharge pipe 7 are connected to the chambers 1a and 1b, respectively, so that the cooling water introduced through the cooling water inflow pipe 6 is the first flow path P1. Heat exchange with air in the process of passing through, and then flows into the second tank (2), the U-turn from the second tank (2) to the second flow path (P2) flows along the second flow path (P), The discharge pipe 7 is discharged through the second chamber 1b.

On the other hand, as shown in Figure 2, in the one-way flow method, the cooling water inlet pipe 6 is connected to the first tank 1, the cooling water discharge pipe 7 is connected to the second tank 2, the cooling water The coolant introduced through the inlet pipe 6 is heat-exchanged with air while passing straight along all the tubes 3, and then is discharged to the coolant discharge pipe 7 via the second tank 2. That is, the cooling water inflow direction and the cooling water discharge direction are the same.

The U-turn method and the one-way flow method according to the prior art have respective advantages and disadvantages. That is, the U-turn method has a high heating performance because the heat transfer area is wide because the length of the flow path is relatively long, but the flow rate of the cooling water is small because the pressure drop is large at the point where the U-turn is turned. In addition, in the one-way flow method, since the coolant flows straight, the pressure drop is relatively small, so that the flow rate of the coolant can be increased, but the heating performance is lowered because the length of the flow path is short.

Through these advantages and disadvantages, the U-turn method has a high heat transfer effect, so it is efficient when the vehicle is driven to a temperature where the coolant temperature has been raised to an appropriate level, and the one-way flow method can increase the flow rate of the coolant so that the coolant temperature is higher than the appropriate level. It is efficient in the low case.

However, since the heater core according to the prior art has only a single flow method, when the U-turn method is employed, the vehicle does not heat up quickly when starting the engine or when the vehicle is idle. There is a downside to falling.

The present invention is to solve the above problems, according to the temperature of the cooling water for the automotive air conditioner to increase the heating efficiency by switching the flow path of the cooling water to a path that can be efficiently heated in the U-turn / one-way flow method The purpose is to provide a heater core.

According to an aspect of the present invention, there is provided a heater core for an automotive air conditioner, including: a first tank having an interior partitioned into two spaces of a first and a second chamber; A second tank arranged side by side with the first tank and having a space therein; A plurality of tubes connected at both ends thereof to the first and second tanks; A heat dissipation fin installed between the tubes; A cooling water inflow passage consisting of first and second inflow passages connected to the first and second chambers of the first tank, respectively; A cooling water discharge passage formed by joining the first discharge passage that is discharged from the second tank and the second discharge passage that is discharged from the second chamber of the first tank; And valve means for selectively opening and closing the second inflow passage and selectively opening the first and second discharge passages in association with the second inflow passage.

The valve means includes a first valve installed on the second inflow passage; And a second valve installed over the first and second discharge passages to selectively open and close the first and second discharge passages in association with the operation of the first valve.

The first and second discharge passages branch from one discharge tube, and the second valve is installed at a confluence point of the first and second discharge passages to selectively open any one of the first and second discharge passages. can do.

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The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings. Prior to this, the terms or words used in the present specification and claims are defined in the technical spirit of the present invention on the basis of the principle that the inventor can appropriately define the concept of the term in order to explain his invention in the best way. It must be interpreted to mean meanings and concepts.

The heater core according to the present invention has a flow path so that the coolant can selectively flow in a u-turn / unidirectional flow manner, and at the same time has a valve means for selecting any one of the u-turn / unidirectional flow flow path.

The mechanical configuration for having a U-turn / one-way flow path is as follows.

As shown in FIG. 3, the heater core 100 includes a plurality of first and second tanks 110 and 120 disposed in parallel with each other, and both ends of the heater core 100 in fluid communication with the first and second tanks 110 and 120. It includes a tube 130 and a plurality of heat dissipation fins 140 interposed between the tubes 130, respectively.

A baffle 113 is formed inside the first tank 110 so as to flow the coolant in a U-turn manner, and divides the inside into the first and second chambers 111 and 112.

Cooling water inflow pipes may be connected to the first and second chambers 111 and 112 of the first tank 110, respectively, and the first and second inflow paths 151 and 152 may be branched from one cooling water inflow pipe 150. The inflow passages 151 and 152 may be connected to the first and second chambers 111 and 112, respectively. In the present invention, the latter is selected and described.                     

The discharge path of the coolant varies according to the flow of the coolant, and the discharge path may also be connected to the second chamber 112 of the second tank 120 and the first tank 110, similarly to the inlet path. In addition, the first discharge path 161 and the second discharge path 162 may be branched from one discharge tube 160. The latter will be described in the present invention. In addition, as illustrated, the first discharge path 161 may be connected to the second inflow path 152.

The valve means for controlling the cooling water to flow in the U-turn / one-way flow is installed in the middle of the second inflow passage 152 branched from the cooling water inlet pipe 150 so that the cooling water flows only into the first chamber 111 or the first and A first valve V1 for selectively opening and closing the second inflow passage 15 so as to flow into both the second chambers 111 and 112; The second valve V2 selectively opens the first and second discharge passages 161 and 162 in conjunction with the first valve V1 according to the inflow path. The second valve V2 is installed over the first and second discharge passages 161 and 162. When the second valve V2 is branched and connected to the second chamber 112 of the second tank 120 and the first tank 110, The first and second discharge passages 161 and 162 may be installed at the branching points, and the passages 161 and 162 may be selectively opened. In this case, a three-way valve may be used as the second valve V2.

According to the heater core according to the present invention, since the temperature of the coolant is low at initial start-up or idle of the engine, the one-way flow method is selected to favor the initial heating by minimizing passage resistance to increase the flow rate of the coolant, and the coolant temperature at driving Since the proper level is maintained, the U-turn method is selected to maximize the heating effect by increasing the heat transfer area.The flow method of such coolant is controlled based on the coolant temperature detected by the coolant temperature sensor (V1, V2). Can be converted to

Heating control method using a heater core for a vehicle air conditioner according to the present invention configured as described above is as follows.

In the initial start-up of the vehicle, when the coolant temperature is lower than the proper temperature such as the idle state, the flow rate of the coolant is increased to determine the one-way flow flow method so that the initial heating is performed quickly.

As shown in FIG. 4, the second inflow passage 152 on the second chamber 112 side is opened by the first valve V1, and the second discharge passage 162 is closed by the second valve V2. At the same time, the first discharge passage 161 is opened. When the valves V1 and V2 are opened and closed as described above, the first and the first tanks 110 of the first tank 110 are formed along the first and second inflow passages 151 and 152 where the coolant flowing through the coolant inlet pipe 150 is branched. After being divided into two chambers 111 and 112, heat-exchanged with air in the process of flowing along the plurality of tubes 130 connected to the respective chambers 111 and 112, and then flowing into the second tank 120, the cooling water is then supplied to the second tank 120. It is discharged through the first discharge passage 161 connected to one side of the tank 120. Cooling water goes straight from the first tank 110 through the tube 130 to the second tank 120 without changing the flow direction, so the flow resistance is small, so the flow rate of the cooling water increases, resulting in fast heating of the vehicle. can do.

On the other hand, if the cooling water is circulated in the engine and its own temperature rises to an appropriate temperature, it is better for heating efficiency to increase the heat transfer area with air than to increase the cooling water flow rate. It is controlled to switch from this one-way flow method to the U-turn method.

As shown in FIG. 5, when the coolant rises to an appropriate temperature as in driving, the second inflow passage 152 of the second chamber 112 side is closed by the first valve V1, and the second valve V2 is closed to the second valve V2. As a result, the first discharge passage 161 is closed and the second discharge passage 162 is opened.

After the coolant flowing through the coolant inlet pipe 150 flows into the first chamber 111 of the first tank 110 along the first inflow passage 151, the tubes corresponding to the first chamber 111 are formed. After the heat exchange with the air flowing along the first flow path (P1) configured by the flow into the second tank 120, the coolant flowed into the second tank 120 is the second flow path along the second tank 120 After the U-turn to the side (P2) to pass through the second passage (P2) heat exchange with the air, it is discharged through the second discharge passage 162 via the second chamber 112 of the first tank (110). That is, the cooling water is heat-exchanged while passing through the first and second flow paths P1 and P2, so that the length of the flow path becomes longer, and thus the heat transfer area becomes wider, thereby improving heating performance.

Since the flow of the coolant is automatically switched according to the temperature of the coolant, the coolant flows in a one-way flow at the initial start-up or idle of the vehicle. Opening and closing is switched, on the contrary, when the coolant flows in a U-turn manner and the coolant falls below an appropriate temperature, the flow of the coolant is switched to the one-way flow method.

As described above, according to the heater core for a vehicle air conditioner according to the present invention, the flow path of the coolant is switched in accordance with the temperature of the coolant so that the heating can be quickened when the vehicle is initially started and idle, and the heating effect when driving. There is an effect to further increase.

While the invention has been described and illustrated in connection with a preferred embodiment for illustrating the principles of the invention, the invention is not limited to the configuration and operation as such is shown and described. Rather, those skilled in the art will appreciate that many modifications and variations of the present invention are possible without departing from the spirit and scope of the appended claims. Accordingly, all such suitable changes and modifications and equivalents should be considered to be within the scope of the present invention.

Claims (4)

A first tank 110 whose interior is divided into two spaces of the first and second chambers 111 and 112; A second tank 120 arranged side by side with the first tank and having a space therein; A plurality of tubes 130 connected at both ends thereof to the first and second tanks; A heat dissipation fin 140 installed between the tubes; A cooling water inflow passage consisting of first and second inflow passages 151 and 152 respectively connected to the first and second chambers of the first tank; A cooling water discharge passage formed by joining the first discharge passage 161 that is discharged from the second tank and the second discharge passage 162 that is discharged from the second chamber of the first tank; And, And a valve means for selectively opening and closing the second inflow passage (152) and selectively opening the first and second discharge passages in association with the second inflow passage (152). 2. The valve of claim 1, wherein the valve means comprises: a first valve (V1) installed on the second inflow passage; And a second valve (V2) installed over the first and second discharge passages to selectively open and close the first and second discharge passages in conjunction with the operation of the first valve. Heater cores for air conditioning units. 3. The first and second discharge passages of claim 2, wherein the first and second discharge passages branch from one discharge pipe, and the second valve is installed at a confluence point between the first and second discharge passages. Heater core for a vehicle air conditioner, characterized in that to open any one. delete

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