KR101622700B1 - Heat exchanger method for the ice maker and the method making a heat exchanger for the ice maker - Google Patents

Abstract

The present invention relates to a heat exchanger manufacturing method for a deicer, and a heat exchanger for the deicer manufactured by the method which manufactures heat exchange units having a refrigerant free duct unit by a press fit, a refrigerant passage unit connecting a space between heat exchange units, and an upper frame and a lower frame having a refrigerant intake tube and a refrigerant discharge tube formed in a single united body in each heat exchange unit formed on both ends; welds a joint of an upper and a lower frame by attaching the upper and lower frames to each other; and welds the upper and lower frames with a deicing unit by passing the deicing unit through the refrigerant free duct unit of the upper and lower frames. The present invention is able to form various shapes by manufacturing the upper and lower frames in a press fit method; shortens a manufacturing time of the upper and lower frames by forming the upper and lower frames by a simple press fitting operation; and has no inconvenience of separately welding a refrigerant unit, a refrigerant introduction tube, and a refrigerant discharge tube on the heat exchange unit as the heat exchange unit, the refrigerant passage unit, the refrigerant introduction tube, and the refrigerant discharge tube are formed on the upper and lower frames in a single united body during the press fitting operation. As such, the present invention has an advantage of easily manufacturing the heat exchanger by a simple process of welding a space between the deicing unit and the upper and lower frames by welding a joint of the upper and lower frames, and inserting the deicing unit into the refrigerant free duct unit while attaching the upper and lower frames to each other; and has an advantage of improving reliability of a product by reducing fraction defects by minimizing a welding part.

Description

TECHNICAL FIELD The present invention relates to a method of manufacturing a heat exchanger for an ice maker and a heat exchanger for an ice maker manufactured by the method,

More particularly, the present invention relates to a method of manufacturing a heat exchanger, and more particularly, to a method of manufacturing a heat exchanger by joining upper and lower frames formed by press- A method of manufacturing a heat exchanger for an ice maker and a heat exchanger for an ice maker manufactured by the method.

Generally, the ice maker is a device for producing ice by freezing the supplied water or the supply water stored in a predetermined space.

Here, the ice maker has a heat exchanger therein. The heat exchanger is maintained at a low temperature state by the refrigerant repeatedly circulated, and the supply water flows to the heat exchanger in the low temperature state, so that the supply water is cooled by heat exchange action with the heat exchanger It is formed of ice.

Patent Document 1 discloses a conventional ice maker. Referring to this, a plurality of ice-making units arranged in a line and guiding the supply water to flow downward from above, and a plurality of ice- And a heat exchanger installed above the ice making unit to cool the supply water flowing from the upper side to the lower side through the ice making unit.

Here, a refrigerant inlet pipe and a refrigerant outlet pipe are formed on the outer surface of the heat exchanger so as to be offset from each other with respect to a horizontal line.

At this time, the refrigerant supplied through the refrigerant inflow pipe passes through the refrigerant free duct portion of the heat exchanging portion, and is discharged through the refrigerant discharge pipe. The discharged refrigerant passes through the other heat exchanging portion sequentially and repeatedly, And is discharged through a negative refrigerant discharge pipe.

Then, the outer circumferential surface of the ice-making unit is maintained in a cooled state by the refrigerant passing through the heat exchanging unit. At this time, the supply water flowing downward on the inner circumferential surface of the ice-making unit passes through the ice- do.

However, in the above-described Patent Document 1, it is troublesome to fabricate a heat exchanging part in a casting manner, to have a monotonous product shape, to manufacture a heat exchanging part, a refrigerant inflow pipe and a refrigerant discharge pipe, respectively. It is possible to increase the number of workers in the mass production of the heat exchanger and to increase the human rights ratio. Also, the flow rate of the refrigerant can be increased according to the state of welding between the heat exchange unit and the refrigerant inlet pipe and the refrigerant discharge pipe. There is a problem that the reliability of the product deteriorates due to the refrigerant leakage problem.

KR 10-1026909 B1

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide a heat exchanger having a refrigerant free conduit portion by press-fitting, a refrigerant passage portion connecting between the heat exchanger portions, The upper and lower mold frames are closely contacted with each other to weld the joints, and the freezing unit is passed through the refrigerant free conduit section of the upper and lower frames so that the upper and lower mold frames And a method for manufacturing a heat exchanger for an ice maker that joins the ice-making unit with welding.

Another object of the present invention is to provide an upper frame having a heat exchanging portion having a refrigerant free duct portion formed at its center portion and a refrigerant passage portion connecting between the heat exchanging portions and a refrigerant inlet pipe and a refrigerant discharge pipe integrally formed at both ends of the heat exchanging portion, And a lower frame formed integrally with the refrigerant outlet pipe and the refrigerant outlet pipe are closely fixed to a lower portion of the upper frame and a heat exchanging portion symmetrical with the upper frame. So that the refrigerant supplied through the refrigerant inflow pipe passes through the heat exchanging unit and the refrigerant passage unit and is discharged through the refrigerant discharge pipe to cool the outer peripheral surface of the freezing unit, And an object of the present invention is to provide a heat exchanger for an ice maker.

In order to achieve the object of the present invention, a method of manufacturing a heat exchanger for an ice maker according to the present invention is characterized in that a lower portion is opened, a free refrigerant passage portion is formed at an inner edge thereof, and a plurality A first step of press-molding the upper frame formed with the refrigerant inlet pipe and the refrigerant outlet pipe integrally formed at both ends of the heat exchanging unit; A second process of press-fitting a lower frame formed by integrally forming a refrigerant inlet pipe and a refrigerant outlet pipe with a heat exchanger forming a refrigerant free conduit portion having a symmetrical shape on the upper frame formed in the first process; A third step of welding the upper and lower frames formed in the first and second processes up and down together and welding the joints; And a tubular ice maker unit for guiding the flow of the water to be supplied to the center portion of the heat exchanging portion of the upper and lower mold frames is welded between the ice making unit and the lower and upper mold frames to fix the ice making unit to the upper and lower mold frames And a fourth step of:

In the first and second processes, the refrigerant flowing through the refrigerant free duct portion between the heat exchanging portions is moved from the refrigerant inlet pipe toward the refrigerant outlet pipe in the method of manufacturing a heat exchanger according to the present invention, And the passage portion is further formed.

In the second process, the diameter of the heat exchanging portion of the lower frame is formed to be larger than the diameter of the heat exchanging portion of the upper frame. In the third process, the lower frame And the edge of the heat exchange portion of the upper frame is bent so as to surround the outer circumferential surface of the heat exchange portion of the upper frame so that the lower frame and the upper frame are welded to each other.

The heat exchanger for an ice maker according to the present invention is characterized in that the heat exchanger which is opened by press-fitting and which forms the refrigerant free conduit along the inner edge is arranged in a plurality of rows so as to be spaced apart from each other by a predetermined interval, The upper frame having a refrigerant passage portion for guiding the refrigerant flowing from the one direction to the other direction and having a refrigerant inlet pipe and a refrigerant outlet pipe integrally formed at both ends of the heat exchange portion; A refrigerant passage portion which is tightly fixed to the lower portion of the upper frame and forms a refrigerant free conduit portion symmetrical with the upper frame by press-fitting, a refrigerant passage portion connecting between the heat-exchanging portions, A lower mold frame integrally forming a pipe and a coolant discharge pipe; And an ice making unit coupled to the upper and lower die frames so as to penetrate through the center portion of the heat exchanging portion and guide the supply water to flow downward from above.

In the heat exchanger for an ice maker according to the present invention, the upper and lower mold frames are installed in at least one row along the longitudinal direction of the ice-making unit in a state of being tightly coupled to each other, .

According to the present invention, various shapes can be realized by manufacturing the upper and lower die frames by a press-fitting method, and the upper and lower die frames are formed by a simple operation of pressing the press to shorten the time for producing the upper and lower die frames, There is no need to separately weld the refrigerant passage portion, the refrigerant inlet pipe, and the refrigerant discharge pipe to the heat exchanging portion in which the heat exchanging portion, the refrigerant passage portion, the refrigerant inlet pipe, and the refrigerant discharge pipe are integrally formed in the upper and lower mold frames, A heat exchanger is easily manufactured by welding a joint of the lower and upper mold frames and inserting the freezing unit into the freezing channel portion by welding the lower and upper mold frames together with the upper and lower mold frames, It is advantageous that the defect rate is reduced due to minimization and the reliability of the product is improved.

1 is a perspective view showing a heat exchanger for an ice maker according to the present invention;
FIG. 2 is a partially exploded perspective view of FIG. 1; FIG.
FIG. 3 is a partially cutaway perspective view showing the upper and lower frames of the heat exchanger for an ice maker according to the present invention, cut away. FIG.
4 is a plan view of a heat exchanger for an ice maker according to the present invention.
5 is a flowchart showing a method of manufacturing a heat exchanger for an ice maker according to the present invention.

1 to 3, the upper frame 100 includes a heat exchange unit 101 having a lower portion opened by press-fitting and forming a refrigerant free duct portion 101a along an inner edge thereof, a plurality of A refrigerant passage portion 102 is formed between the heat exchanging portions 101 so as to guide the refrigerant passing through the refrigerant free conduit portion 101a to move in the other direction from one direction and the heat exchanging portion 101, A refrigerant inlet pipe 103 and a refrigerant outlet pipe 104 are integrally formed at both ends.

The outer surface of the heat exchanging part 101 is preferably formed in a multi-stage structure.

The upper frame (100) is closely coupled to the lower frame (200), and is joined by welding.

The open bottom of the upper frame (100) is closed by the lower frame (200).

The refrigerant free conduit section 101a is sealed by the freezing unit 300 which communicates with the refrigerant free conduit section 201a of the lower frame 200 and is fastened through the center of the upper frame 100 The refrigerant supplied through the refrigerant inlet pipe 203 is passed along the outer surface of the ice making unit 203.

The refrigerant passage portion 102 guides the refrigerant passed through the refrigerant free conduit portion 101a to be transferred to the other heat exchange portion 101. [

The diameter of the heat exchanging part 101 of the upper frame 100 is preferably smaller than the diameter of the heat exchanging part 201 of the lower frame 200.

The outer surface of the heat exchanging part 101 is wrapped around the heat exchanging part 201 of the lower frame 200.

The lower mold frame 200 includes a heat exchanging unit 201 tightly fixed to the lower portion of the upper frame 100 and forming a refrigerant free duct portion 201a symmetrical with the upper frame 100 by press- A coolant inlet pipe 203 and a coolant outlet pipe 204 are integrally formed at both ends of the coolant passage portion 202 connecting between the heat exchange portions 201 and the heat exchange portion 201.

The outer surface of the heat exchanging part 101 is preferably formed in a multi-stage structure.

The lower mold frame 200 is closely coupled with the upper mold frame 100 by being welded.

The opened lower portion of the lower mold frame 200 is sealed by the upper frame 100.

The refrigerant free conduit section 201a is sealed by the ice making unit 300 which communicates with the refrigerant free conduit section 101a of the upper frame 100 and is fastened through the center of the lower frame 200 And the refrigerant supplied through the refrigerant inlet pipe 203 is passed along the outer surface of the ice making unit 300.

The refrigerant passage portion 202 guides the refrigerant passing through the refrigerant free conduit portion 201a of the heat exchanging portion 201 to move to the refrigerant free conduit portion 201a of the other heat exchanging portion 201. [

The diameter of the heat exchanging part 201 of the lower mold frame 200 is preferably larger than the diameter of the heat exchanging part 101 of the upper frame 100.

The rim of the heat exchanging unit 201 is bent to surround the rim of the heat exchanging unit 101 of the upper frame 100.

The upper and lower mold frames 100 and 200 are joined together by welding so as to be in contact with each other so as to guide the flow of the coolant into the coolant free passage portions 101a and 201a and the coolant passage portions 102 and 202 ), Refrigerant inlet pipes (103, 203), and refrigerant outlet pipes (104, 204).

The ice making unit 300 is fastened so as to pass through the center portion of the heat exchanging portion 101 of the upper and lower mold frames 100 and 200 so that the supply water flows downward from above.

The freezing unit 300 is fixed to the heat exchange units 101 and 201 of the upper and lower frames 100 and 200 by welding.

The ice making unit 300 performs heat exchange with the supply water flowing downward from the upper side while being cooled by the refrigerant passing through the heat exchanging units 101 and 201 of the upper and lower frames 100 and 200, Cool the water.

The ice making unit 300 flows the supply water downward along the inner circumferential surface thereof.

The method of manufacturing a heat exchanger for an ice maker according to the present invention is as follows.

Referring to FIG. 5, first, a plate material is provided, and the plate material is pressed by a press device (not shown) to manufacture upper and lower frames 100 and 200.

At this time, the upper frame 100 includes a plurality of heat exchanging parts 101 connected to each other so that the refrigerant free conduit part 101a at the inner edge is communicated with the lower part opened, The refrigerant inlet pipe 103 and the refrigerant outlet pipe 104 are integrally formed (S100).

The lower mold frame 200 integrally includes a heat exchanger 201 formed to be symmetrical with the upper frame 100 and a refrigerant inlet pipe 203 and a refrigerant outlet pipe 204 at step S200.

Here, the upper and lower frames 100 and 200 are arranged such that the refrigerant passed through the refrigerant free conduits 101a and 201a of the heat exchanging units 101 and 201 is discharged to the other heat exchanging unit 101, and 201, respectively, are formed in the refrigerant passage portions 102 and 202, respectively.

Subsequently, the upper frame 100 and the lower frame 200 manufactured by the press apparatus (not shown) are brought into close contact with each other and are welded along the seams of the upper frame 100 and the lower frame 200, The upper frame 100 and the lower frame 200 are connected to each other (S300).

At this time, the heat exchanger 201 of the lower frame 200 is bent upward so as to surround the outer surface of the heat exchanger 101 of the upper frame 100. In this state, the upper and lower frames 100, 200 are welded to each other, the upper and lower frames 100 and 200 are firmly connected and fixed.

Particularly, by connecting the upper and lower frames 100 and 200 in close contact with each other, the heat exchange portions 101 and 201 of the upper and lower frames 100 and 200, the refrigerant inflow pipes 103 and 203, The refrigerant discharge pipes 104 and 204 and the refrigerant passage portions 102 and 202 communicate with each other to form a flow path for guiding the flow of the refrigerant.

Thereafter, the ice making unit 300 is inserted into the center of the heat exchanging units 101 and 201 of the upper and lower frames 100 and 200, and the ice making unit 300 is inserted between the upper and lower frames 100 and 200 And the refrigerant free conduits 101a and 201a of the heat exchanging units 101 and 201 are sealed by S400.

Referring to FIG. 4, when the supply water is supplied through the ice making unit 300 of the heat exchanger for ice maker manufactured according to the above-described method, and the refrigerant is supplied through the refrigerant inlet pipes 103 and 203, The refrigerant supplied through the refrigerant inlet pipes 103 and 203 is supplied to the heat exchanging units 101 and 201 and the refrigerant supplied to the heat exchanging units 101 and 201 flows through the refrigerant free ducts 101a and 201a, Thereby cooling the outer peripheral surface of the ice-making unit 300 while passing along the outer peripheral surface of the ice-making unit 300.

The refrigerant passed through the refrigerant free conduit sections 101a and 201a is supplied to the other heat exchanging sections 101 and 201 arranged in series through the refrigerant passage sections 102 and 202 so that the heat exchange (101, 201) while cooling the outer peripheral surface of the other ice making unit (300).

The supply water flowing from the upper side to the lower side on the inner peripheral surface of the ice making unit 300 passes through the portion of the ice making unit 300 cooled by the heat exchanging portions 101 and 201 at a low temperature, The water is cooled by the heat exchange action with the outer surface portion of the ice-making unit 300 while being passed through the cooled outer surface portion of the ice-making unit 300,

The refrigerant supplied through the refrigerant inflow pipes 103 and 203 and passed between the upper and lower frames 100 and 200 is discharged through the refrigerant discharge pipes 104 and 204 to a compressor (not shown) And then through the condenser (not shown), and then recycled through the refrigerant inflow pipes 103 and 203.

In the above description, the upper and lower frames 100 and 200 are provided in a single row in the freezing unit 300 to cool the feed water passing through the freezing unit 300. Hereinafter, A state in which the upper and lower frames 100 and 200 are installed in at least two rows and a state in which a plurality of the lower and upper frames 100 and 200 and the freezing units 300 are arranged in parallel is described in brief.

That is, the upper and lower frames 100 and 200 are installed in at least two rows along the longitudinal direction of the ice making unit 300 in a joined state, Is cooled first and secondarily.

At this time, the refrigerant discharge pipes 104 and 204 of the upper and lower frames 100 and 200 installed in the ice making unit 300 are connected to the refrigerant inflow pipes 103 and 104 of the upper and lower frames 100 and 200, 203 and the refrigerant inflow pipes 103, 203 of the upper and lower frames 100, 200 installed in the two rows are discharged to the refrigerant discharge pipes 104, 204 of the upper and lower frames 100, And the outer peripheral surface of the ice-making unit 300 is cooled.

The upper and lower frames 100 and 200 and the freezing unit 300 are arranged in parallel along the horizontal direction and the upper and lower frames 100 and 200, And the refrigerant inflow pipes 103 and 203 of the upper and lower frames 100 and 200 disposed on the second row are connected to the refrigerant discharge pipes 104 and 204 of the upper and lower frames 100 and 200, 200 are supplied with the refrigerant discharged through the refrigerant discharge pipes 104, 204 of the upper and lower frames 100, 200 disposed on one row and the outer peripheral surface of the ice making unit 300 Cool.

As described above, the upper and lower frames 100 and 200 formed by press-fitting are joined by welding, and the freezing unit 300 is welded to the heat exchanging parts 101 and 201 of the upper and lower frames 100 and 200 The upper and lower mold frames 100 and 200 are formed by a simple press operation so that various shapes can be realized and the lower and upper mold frames 100 and 200 are formed The time required for manufacturing the upper and lower mold frames 100 and 200 is shortened and the heat exchange portions 101 and 201, the refrigerant passage portions 102 and 202, and the refrigerant inflow pipe 202 and the refrigerant inflow pipes 103 and 204 and the refrigerant discharge pipes 104 and 204 are integrally formed in the heat exchange units 101 and 201. The refrigerant inflow pipes 104 and 204 are formed integrally with the heat exchanging units 101 and 201, The upper and lower mold frames 100 and 200 are brought into close contact with each other and the joints of the upper and lower mold frames 100 and 200 Easy welding and heat exchanger is produced by a simple process of welding the ice-making unit 300 to a heat exchanger (101, 201), a central portion, the defect rate is reduced to minimize the weld.

It is to be understood that the present invention is not limited to the above-described embodiment, but may be embodied in various forms and forms without departing from the scope of the present invention. It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

100: upper mold frame 101: heat exchanger
101a: refrigerant free conduit section 102: refrigerant passage section
103: Refrigerant inlet pipe 104: Refrigerant outlet pipe
200: Lower mold frame 201: Heat exchanger
201a: refrigerant free duct portion 202: refrigerant passage portion
203: Refrigerant inlet pipe 204: Refrigerant outlet pipe
300: freezing unit

Claims (5)

A heat exchanging part 101 which is opened in the lower part and is arranged in a plurality of rows so as to be spaced apart by a predetermined distance so as to be connected to each other by forming a refrigerant free pipeline part 101a at an inner edge thereof; (S100) of forming an upper frame (100) integrally formed with a refrigerant discharge pipe (103) and a refrigerant discharge pipe (104) by press-fitting;
A heat exchanger 201 having a refrigerant free duct portion 201a having a symmetrical shape in the upper frame 100 formed in the first process and a heat exchanger 201 having a refrigerant inlet pipe 203 and a refrigerant discharge pipe 204 formed integrally A second process (S200) of forming the lower mold frame 200 by press-fitting;
A third process (S300) of welding the upper and lower frames 100 and 200 formed up in the first process (S100) and the second process (S200) upward and downward, and connecting the joints with each other by welding;
A tubular ice making unit 300 for guiding the flow of the supply water is inserted into the center of the heat exchanging units 101 and 201 of the upper and lower frames 100 and 200 and the ice making unit 300, (S400) of fixing the freezing unit (300) to the upper and lower frames (100, 200) by welding between the upper and lower frames (100, 200);
And a second heat exchanger for cooling the second heat exchanger. The method according to claim 1,
In the first step S100 and the second step S200,
A refrigerant passage portion for moving the refrigerant passing through the refrigerant free pipeline portions 101a and 201a between the heat exchanging portions 101 and 201 in the direction of the refrigerant discharge pipes 104 and 204 from the refrigerant inlet pipes 103 and 203 102, 202) is further formed on the upper surface of the heat exchanger. The method according to claim 1,
In the second step S200, the diameter of the heat exchanging part 201 of the lower frame 200 is formed to be larger than the diameter of the heat exchanging part 101 of the upper frame 100,
The edge of the heat exchanging unit 201 of the lower frame 200 is bent so as to surround the outer circumferential surface of the heat exchanging unit 101 of the upper frame 100. In the third step S300, And the edge portion of the upper mold frame (100) is connected by welding. And a heat exchange portion 101 which is opened by press-fitting and which forms a refrigerant free pipeline portion 101a along the inner edge is arranged in a plurality of rows so as to be spaced apart from each other by a predetermined distance, A refrigerant passage portion 102 for guiding the refrigerant flowing through the conduit portion 101a to move in one direction from the other is formed and a refrigerant inlet pipe 103 and a refrigerant outlet pipe 104 are connected to both ends of the heat exchanging portion 101, (100) formed integrally with the upper frame (100);
A heat exchange section 201 which is closely fixed to a lower portion of the upper frame 100 and forms a refrigerant free conduit section 201a symmetrical to the upper frame 100 by press-fitting, A lower frame 200 integrally formed with a refrigerant inlet pipe 203 and a refrigerant outlet pipe 204 at both ends of the heat exchanging unit 201;
A ice making unit 300 coupled to the upper and lower frames 100 and 200 so as to penetrate through a central portion of the heat exchanging unit 101 and guiding the supply water to flow downward from above;
And a heat exchanger for cooling the ice making chamber. 5. The method of claim 4,
The upper and lower frames (100, 200)
Wherein at least one or more rows of the heat exchangers are provided along the longitudinal direction of the ice making unit (300) in close contact with each other to cool the supply water flowing through the ice making unit (300).

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