KR100822529B1 - Structure for connecting coolant inlet and outlet pipe of heater core - Google Patents

Abstract

The present invention relates to a cooling water inlet and outlet pipe connection structure of the heater core, to minimize the space occupied by the heater core, and to easily connect the inlet and outlet pipe.

In the cooling water inlet and outlet pipe connection structure of the disclosed heater core, the block 10 is fixed to the inlet hole 2a formed on the upper surface of the upper tank 2 of the heater core 1, and the block provides cooling water for guiding the inflow of the cooling water. The inlet pipe 6 is connected and fixed, and the fixing bracket 20 is fitted to the coolant inlet pipe, and the bolt 24 is fastened to the block. The block 30 is fixed to the discharge hole 3a formed at the side surface of the lower tank 3, and a coolant outlet pipe 7 for guiding circulation of the coolant is connected to the upper surface of the block, and to the coolant outlet pipe. The fixing bracket 40 is fitted to the bolt 44 is fastened to the block. As a result, since the cooling water outlet pipe can be connected to the lower tank without changing the direction of the end of the block, the space occupied by the heater core is reduced, and the outlet pipe is fixed to the block by a simple operation of bolting the fixing bracket. can do.

Heater core, lower tank, outlet pipe, block, bracket, bolt

Description

Coolant inlet and outlet pipe connection structure of heater core {STRUCTURE FOR CONNECTING COOLANT INLET AND OUTLET PIPE OF HEATER CORE}

1A and 1B are front and side views, respectively, of a heater core according to the prior art;

Figure 2 is an exploded perspective view for showing a connection structure of the coolant inlet pipe according to the present invention.

Figure 3 is a longitudinal sectional view showing a connection structure of the coolant inlet pipe according to the present invention.

Figure 4 is an exploded perspective view for showing a connection structure of the coolant outlet pipe according to the present invention.

Figure 5 is a longitudinal sectional view showing a connection structure of the coolant outlet pipe according to the present invention.

6 and 7 are respectively a front view and a side view of a heater core to which a cooling water inlet and outlet pipe connection structure according to the present invention is applied.

Figure 8 is another illustration of the fixing bracket applied to the cooling water inlet and outlet pipe connection structure according to the present invention.

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

2: upper tank, 2a: inlet hole

3: lower tank, 3a: discharge hole

10,30: block, 11,31: euro                 

12,32 insertion piece, 13,33 seating part

14,34: Bolt groove, 15,35: O-ring

20,40: Fixed bracket, 21,41: Insertion part

22,42: bolt ball, 23,43: wing piece

24,44 bolts,

The present invention relates to a cooling water inlet and outlet pipe connection structure of the heater core, and more particularly to a cooling water inlet and outlet pipe connection structure of the heater core to reduce the occupancy of the heater core occupied in the air conditioning apparatus and to easily connect the inlet and outlet pipe. will be.

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 air conditioner includes an air conditioner case having vents communicating with an air inlet and an interior and opening and closing by each door, an evaporator installed at an air inlet side of the air conditioner case, and a heater core lying on a heater core receiving portion below the evaporator. And a temperature control door installed between the evaporator and the heater core to selectively open and close the front of the heater core.

The heater core includes a first and second tanks having a flow path therein, a coolant tube arranged side by side between the first and second tanks, and both ends of which are respectively connected to the first and second tanks, and It consists of a heat radiation fin installed between.

A baffle is installed in an approximately central portion of the first tank so that the inner space is divided into two spaces, and the coolant inlet and outlet pipes are respectively installed in the partitioned space.

According to the heater core according to the prior art, the coolant discharged from the engine flows along the first flow path by the tube which is introduced into the first space of the inlet side of the first tank and communicates with the first space through the inlet pipe to the second tank. Then, after moving to the other side of the second tank, U-turn to the second flow path flows along the second flow path and is discharged through the cooling water outlet pipe through the discharge-side second space of the first tank.

However, according to the heater core according to the prior art, the water-side pressure drop in this portion is concentrated as all the coolant flowing into the second tank through the first channel is concentrated in the center of the second tank to U turn to the second channel side. Since it becomes large, there is a problem that the heating performance is lowered.

Another example of a method for reducing the pressure drop generated when the coolant flows in the U-turn method is, for example, a one way flow method. As shown in FIG. 1A and FIG. 1B, the heater core 1 by the one-way flow system is a plurality installed in parallel between the upper and lower tanks 2 and 3 and the upper and lower tanks 2 and 3, respectively. Connected to the tube 4 (shown in FIG. 1A), the plurality of heat dissipation fins 5 (shown in FIG. 1A) installed between the tubes 4, and the upper and lower tanks 2, 3, respectively. And a cooling water inlet / outlet pipe (6) (7) for guiding the circulation of the cooling water.

The ends of the coolant inlet / outlet pipes 6 and 7 are respectively bent so that one end thereof is connected to the upper tank 2 and the lower tank 3 while the other end thereof is bent in the same direction.

According to the one-pass heater core 1 configured as described above, the coolant flowing into the upper tank 2 through the coolant inlet pipe 6 is divided into tubes 4 and is straight along the tube 4. Flows into the lower tank (3) and is returned to the engine through the coolant outlet pipe (7).

According to the heater core according to the prior art, the end of the outlet tube 7 is connected to the side of the lower tank 3 with the same route as the coolant inlet tube 6 via the upper tank 2 along the tube 4. At this time, the end of the outlet pipe (7) is bent at approximately right angles to be coupled to the side of the lower tank (3) and the direction is changed, the length of the structurally bent end of the outlet pipe (7) Since it should be secured to a degree, there is a disadvantage in that the distance from the side of the lower tank 3 to the outlet pipe 7 is far. That is, since the heater core 1 occupies a lot of space in the air conditioner case by the outlet pipe 7, the system cannot be compactly constructed.

In addition, a method of brazing, torch welding, or the like may be used as a method of coupling the coolant inlet / outlet tubes 6 and 7, and at the time of brazing coupling, only an end of the upper and lower tanks ( 2) (3) has a disadvantage in that the coupling area is narrow compared to the length thereof, so that cracks may occur at the connection part of the inlet / outlet pipes 6 and 7 and the coolant may leak. In addition, during torch welding, cracks may occur in the upper and lower tanks 2 and 3 and the inlet / outlet pipes 6 and 7, and the production time is reduced due to the long working time and the need for expensive equipment. There are also disadvantages of rising costs.

The present invention is to solve the above problems, to improve the connection structure of the cooling water pipe to guide the circulation of the cooling water to provide a cooling water inlet and outlet pipe connection structure of the heater core that can be configured to the heater core compactly. have.

In addition, another object of the present invention is to easily connect the cooling water circulation pipe, and to reduce the cost.

Cooling water inlet and outlet pipe connection structure of the heater core according to the present invention for achieving the above object, the upper and lower tanks are arranged side by side hollow; A coolant inlet pipe and a coolant outlet pipe sequentially connected to the upper and lower tanks; A plurality of tubes installed between the upper and lower tanks; In the heater core consisting of a heat radiation fin installed between the tubes, the cooling water inlet pipe is connected in fluid communication with the inlet hole formed in the upper surface of the upper tank, the cooling water outlet pipe is discharged formed on the side of the lower tank An end thereof is fluidly coupled to the block coupled to the ball and is arranged in line with the tube while being proximate to the tube.

One side opening of the flow path inside the block may be opened toward the side to be connected to the discharge hole of the lower tank, and the other side may be opened upward to be combined with the coolant outlet pipe.

An annular protrusion may be formed at each end of the cooling water inlet / outlet tube, and fixing brackets which are bolted to the block may be fitted at the upper side of the protrusion of the cooling water inlet / outlet tube.

The fixing bracket may include an insertion part inserted into an upper side of a protrusion of the cooling water inlet / outlet pipe, and a pair of wing pieces formed on both sides of the insertion part and fastened to the block.

The fixing bracket has a pair of fixing pieces having a symmetrical structure, one end of which is hinge-engaged and the other end of which is detachably fastened by a fastening means, to be fitted over the protrusion of the inlet / outlet pipe, and the fixing pieces. It can be made of a pair of wing pieces fastened to the block.

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.

Figure 2 is an exploded perspective view showing a cooling water inlet pipe connection structure according to the present invention, Figure 3 is a longitudinal sectional view showing a cooling water inlet pipe connection structure according to the present invention, Figure 4 is a connection structure of the cooling water outlet pipe according to the present invention. 5 is a longitudinal sectional view showing a connection structure of a coolant outlet pipe according to the present invention, and FIG. 6 is a front view of a heater core to which a coolant inlet / outlet pipe connection structure according to the present invention is applied, and FIG. Is a side view of a heater core to which a cooling water inlet / outlet pipe connection structure according to the present invention is applied. The same reference numerals as used in FIGS. 1A and 1B indicate the same components.

As shown in Figure 6 and 7, according to the cooling water inlet / outlet pipe connection structure according to the present invention, the cooling water inlet pipe 6 is fixed to the upper surface of the upper tank 2 of the heater core 1, the lower tank The cooling water outlet pipe 7 is fixed to the side surface of (3).

The connection structure of the cooling water inlet pipe 6 is as follows.

As shown in FIG. 2, the inlet hole 2a is drilled in the upper surface of the upper tank 2, and the inlet hole 2a of the upper tank 2 is provided with a flow passage 11 penetrating up and down therein. 10 is fixed, the cooling water inlet pipe 6 is inserted into the inlet of the flow path 11 of the block 10, the fixing bracket 20 for fixing the cooling water inlet pipe 6 in the block 10 ) Is fixed.

The block 10 is formed in a box shape, and a tubular insertion piece 12 inserted into the flow path 11 of the upper tank 2 has an end portion of the flow path 11 therein than the bottom surface of the block 10. It is formed so as to protrude, the seating portion 13 in which the cooling water inlet pipe 6 is seated is formed on the inlet side circumference of the flow path 11, the bolt groove 14 is formed on both sides of the inlet of the flow path 11, respectively do.

Inlet hole (2a) of the upper tank (2) and the insertion piece 12 of the block 10 is preferably formed in a substantially oval shape so that the cooling water can be smoothly introduced.

The annular projection 6a is formed at a spaced distance from the end of the coolant inlet pipe 6.

The fixing bracket 20 is formed of an inlet tube insertion portion 21 formed in a substantially circular shape, and wings pieces 23 extending from both sides of the inlet tube insertion portion 21 and provided with bolt holes 22.

The fixing bracket 20 is fastened to the bolt hole 22 and the bolt groove 14 of the block 10 while the cooling water inlet tube 6 is inserted into the inlet tube insertion portion 21 to cover the annular projection 6a. It is coupled to the block 10 by bolts 24.

In the figure, reference numeral 15 is an O-ring interposed between the coolant inlet pipe seat 13 and the coolant inlet pipe 6 to prevent leakage of the coolant.

According to the connection structure of the cooling water inlet pipe configured as described above, as shown in FIG. 3, the insertion piece 12 of the block 10 is inserted and brazed into the upper inlet hole 2a of the upper tank 2, The O-ring 14 is fitted to the end of the inlet pipe 6 and the O-ring 14 is in close contact with the seating portion 13 of the block 10 while the fixing bracket 20 is fitted above the annular projection 6a. Insert the end of the cooling water inlet pipe 6 until it is, and fasten the bolt 24 to the bolt hole 22 of the fixing bracket 20 and the bolt groove 14 of the block 10 in communication with each other.

The connection structure of the cooling water outlet pipe 7 is as follows.

4 and 5, a discharge hole 3a is drilled in one side of the lower tank 3, and the discharge hole 3a has a block 31 having an oil passage 31 penetrating therein in an L-shape. 30 is fixed, the cooling water outlet pipe 7 is connected to the outlet of the flow path 31 of the block 30, the fixing bracket for fixing the cooling water outlet pipe (7) on the upper surface of the block ( 40) is fixed.

The block 30 is formed in a box shape, and the L-shaped flow passage 31 therein is formed such that its inlet side opens toward the side and the outlet side opens toward the upper surface. At the inlet side of the flow path 31, a tubular insertion piece 32 inserted into the discharge hole 3a of the lower tank 3 is formed such that an end thereof protrudes from the side surface of the block 30, and the upper side of the flow path 31. At the circumferential portion of the outlet side, a seating portion 33 on which the coolant outlet pipe 7 is seated is formed to be stepped, and bolt grooves 34 are formed at both sides of the outlet tube seating portion 33, respectively.

The discharge hole 3a of the lower tank 3 and the insertion piece 32 of the block 30 are preferably formed in an approximately oval or long hole shape so that the cooling water can be smoothly introduced.

The annular projection 7a is formed at a spaced distance from the end of the cooling water outlet pipe 7. Cooling water outlet pipe 7 is coupled to the upper surface of the block 30 can be coupled even if the end is not bent in a straight form, the outlet pipe 7 is the same on the side of the heater core (1) It can be placed in close proximity while maintaining spacing.

The fixing bracket 40 is formed of an inlet tube inserting portion 41 formed in a substantially circular shape, and a wing piece 43 extending from both sides of the inlet tube inserting portion 41 and provided with a bolt hole 42.

The fixing bracket 40 is fastened to the bolt hole 42 of the block 30 and the bolt hole 42 while the cooling water outlet tube 7 is inserted into the inlet tube inserting portion 41 to cover the annular projection 7a. It is coupled to the block 30 by bolts 44.

Reference numeral 35 in the drawings is an O-ring interposed between the coolant inlet pipe seat 33 and the coolant outlet pipe 7 to prevent leakage of the coolant.

According to the connection structure of the cooling water inlet pipe configured as described above, as shown in FIG. 5, the insertion piece 32 of the block 30 is inserted into the discharge hole 3a of the lower tank 3 and brazed, and the outlet pipe ( 7, the O-ring 35 is fitted to the end of the annular projection 7a, and the O-ring 35 is in close contact with the seating portion 33 of the block 30 with the fixing bracket 40 fitted thereon. The end of the cooling water outlet pipe 7 is inserted, and the bolt 44 is fastened to the bolt hole 42 of the fixing bracket 40 and the bolt groove 34 of the block 30 communicating with each other.

Figure 8 is a perspective view showing another embodiment of the fixing bracket (20, 40) applied to the cooling water inlet / outlet pipe connection structure according to the present invention, the fixing bracket (20, 40) is hinged (h) one side is coupled to the other end Is a pair of fixing pieces 26 and 46 in a symmetrical structure that are detachably coupled by means of bolts 25 and 45, and wing pieces which are respectively formed on the fixing pieces 26 and 46 and fastened to the block ( 26a, 46a). That is, as shown in Figures 2 and 4, the fixing piece (20, 40) is inserted into the other end of the cooling water inlet / outlet pipe (6, 7) without having to move to the projection (6a, 7a) of one side ( 26, 46 is opened and inserted into the inlet / outlet pipes 6, 7 above the protrusions 6a, 7a and then the bolts 25, 45 are fastened to the wing pieces 26a, 46a to fix the brackets 20, 40. Installation is simplified.

Therefore, the cooling water outlet pipe 7 is coupled to the side surface of the lower tank 3, but is coupled through the block 30 so that the end can be made in a straight line without bending for a change of direction as conventionally, the outlet pipe (7) can be arranged close to the heater core 1.

Then, the coolant inlet / outlet pipes 6 and 7 are coupled to the upper and lower tanks 2 and 3 via the blocks 10 and 30, and in particular, the inlet / outlet pipes 6 and 7 are It is coupled to the blocks 10 and 30 by the fixing brackets 20 and 40 fastened to the bolts 24 and 44 so that cracks do not occur during the coupling.

In addition, the ends of the inlet / outlet pipes 6 and 7 are inserted into the blocks 10 and 30, and the fixing brackets 20 and 40 are bolted to the respective blocks 10 and 30. 44, the inlet / outlet pipes 6 and 7 can be connected to the heater core 1, so that expensive equipment is unnecessary.

As described above, according to the connection structure of the cooling water inlet / outlet pipe of the heater core according to the present invention, the outlet pipe is close to the heater core, so that the space occupied by the heater core inside the air conditioner case is reduced, thereby effectively limiting the limited space in the air conditioner case. It can be utilized as, and the air conditioner can be manufactured compactly.                     

In addition, since the pipe is not cracked when the cooling water inlet / outlet pipe is connected, leakage of the cooling water can be prevented and the reliability of the product can be improved.

In addition, since the outlet pipe can be connected by inserting the outlet pipe into the block and bolting the fixed bracket fitted to the outlet pipe to the block, the connection of the inlet / outlet pipes becomes easy, and the cost is low.

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 (5)

Upper and lower tanks that are hollow and are arranged side by side; A coolant inlet pipe and a coolant outlet pipe sequentially connected to the upper and lower tanks; A plurality of tubes installed between the upper and lower tanks; In the heater core consisting of a heat radiation fin installed between the tubes, The cooling water inlet pipe is connected in fluid communication with the inlet hole formed in the upper surface of the upper tank, the cooling water outlet pipe is coupled to the block is coupled to the discharge hole formed in the side of the lower tank in fluid communication Cooling water inlet and outlet pipe connection structure of the heater core, characterized in that arranged in line with the tube in close proximity to the tube. The heater core of claim 1, wherein one side opening of the flow path inside the block is opened toward the side to be connected to the discharge hole of the lower tank, and the other side is opened toward the upper to be coupled to the cooling water outlet pipe. Cooling water inlet and outlet pipe connection structure. The heater core according to claim 1, wherein annular protrusions are formed at end portions of the cooling water inlet / outlet pipes, respectively, and fixing brackets which are bolted to the block are fitted on upper sides of the protrusions of the cooling water inlet / outlet pipes. Cooling water inlet and outlet pipe connection structure. 4. The heater core according to claim 3, wherein the fixing bracket comprises an insertion portion inserted into an upper side of a protrusion of the cooling water inlet / outlet tube and a pair of blade pieces formed on both sides of the insertion portion and fastened to the block. Cooling water inlet and outlet pipe connection structure. According to claim 1, wherein the fixing bracket is a pair of fixing pieces of a symmetrical structure, one end of which is hinged and the other end is detachably fastened by a fastening means and fitted over the protrusion of the inlet / outlet pipe, Cooling water inlet and outlet pipe connection structure of the heater core, characterized in that consisting of a pair of wing pieces are formed on the fixing pieces fastened to the block.

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