JP2017193396A - Spiral coil laminate and stacked body of spiral coil laminate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide multiple layered coils of copper pipes made of high strength copper, hardly causing any trouble when unwinding copper pipes from coils wound in multiple layers.SOLUTION: A spiral coil laminate is constituted of spiral coils of copper pipes spirally wound and stacked in multiple layers in an extension direction of a center axis of the coil laminate, and comprises A layer spiral coils and B layer spiral coils. The A layer spiral coils and the B layer spiral coils are alternately repeated. The copper pipes of the spiral coils in the respective layers are wound with curvature radii configured to continuously change and a clearance between adjacent copper pipes configured to be smaller than a diameter of the copper pipe. It is characterized in that the copper pipe has a Cu content of 95 mass% or more and a 0.2% yield strength value σ0.2 of 70 MPa or more.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a laminated coil around which a copper tube used as a heat transfer copper tube of a cross fin type heat exchanger such as an air conditioner or an ecocute is wound.

  Conventionally, copper pipes have been used for heat transfer pipes or refrigerant pipes for air conditioners such as room air conditioners and packaged air conditioners, and refrigerators. These copper pipes are made of copper or copper alloy. After being processed, it is wound in a coil shape, and then subjected to a heat treatment such as annealing, and then conveyed to an air conditioner manufacturer or the like. And the copper pipe wound by the coil shape is unwound by an air-conditioner maker, and is processed and used for the shape according to each use.

  As the copper tube wound in a coil shape, a level-wound coil is generally used. This level-wound coil is produced by aligning and winding a copper tube around a bobbin in a coil shape and laminating a number of them. Specifically, for example, as shown in FIGS. 12 to 14, first, the copper tube 22 is moved from the end to the other end around the inner cylinder 24 of the removable bobbin 21 from the coil (reference numeral in FIG. 13). In the direction indicated by the arrow 25, the winding is aligned in the extending direction of the central axis of the coil to form the first-layer winding coil 23a, and then on the first layer in the direction opposite to the first layer (FIG. 13). The copper tube is aligned and wound in the direction indicated by the arrow 26, thereby forming a second-layer aligned winding coil 23 b. This is repeated to produce a level wound coil 21 in which aligned winding coils, in which copper tubes are aligned and wound, are multilayered in a direction perpendicular to the central axis of the coil.

  Then, as shown in FIG. 14, the produced level wound coil 20 is placed on the floor plate 16 so that the extending direction of the central axis of the coil is vertical, and is conveyed to an air conditioner manufacturer or the like. Etc., the copper tube 22 is drawn out from the inside of the level-wound coil, and the coil is unwound. As shown in FIG. 15, when the level wound coil 20 is placed so that the extending direction 33 of the central axis of the coil is in the vertical direction, the level wound coil 20 is unwound in order from the top to the bottom. On the contrary, the winding coil 23a and the aligned winding coil 23b that is sequentially unwound from the bottom to the top alternately exist. Then, when the coil winding is unwound from the top to the bottom, the aligned winding coil 23a is unwound up to the bottom copper tube 22a. This time, they will be unwound in order from bottom to top. Since the weight of all copper pipes of the layer is applied to the bottom copper pipe 22b of the aligned winding coil 23b that is sequentially unwound from the bottom to the top, the bottom copper pipe 22b is the bottom plate 16. The lowermost copper tube 22b is sandwiched between the floor plate 16 and the upper copper tube, and the copper tube 22b cannot be fed out.

  Therefore, in Japanese Patent Application Laid-Open No. 2002-370869 (Patent Document 1), as shown in FIG. 16, when the extension direction of the central axis of the coil is placed in the vertical direction, winding is performed in order from the bottom to the top. The aligned winding coil 27b to be unwound is pulled upward from the aligned winding coil 27a to be unwound in order from the top to the bottom, and below the lowermost copper tube 22b of the aligned winding coil 27b. A level-wound coil (so-called step-down coil) that prevents the bottom copper pipe 22b from being pinched between the floor board 16 and the upper copper pipe by forming a gap between the floor board 16 and the floor board 16 is disclosed. Has been. In this step-down coil, the size of the gap formed between the lowermost copper tube and the bottom plate of the aligned winding coil that will be unwound in order from top to bottom is the copper tube diameter of the copper tube. It is set to about half of.

JP 2002-370869 A

  The floorboard on which the level wand coil is placed must be made of a material that is soft to some extent so that the copper pipe at the bottom of the coil is not crushed during transportation. Therefore, in the step-down level wound coil of Patent Document 1, the lowermost copper tube of the aligned winding coil that is to be unwound in order from the top to the bottom is sunk into the floor plate to some extent.

  And if the amount of squeezing into the bottom copper tube base plate of the aligned winding coil that will be unwound in order from the top to the bottom becomes too large, the aligned winding will be unwound in order from the bottom to the top. Even the bottom copper tube of the coil comes into contact with the bottom plate, and when the bottom copper tube is drawn out, resistance is received by the bottom plate, and extra force is applied to the bottom copper tube. End up. For this reason, there is a problem in that this causes breakage of the copper tube and causes a feeding trouble. In particular, the smaller the diameter of the copper tube, especially when the diameter of the copper tube is 5 mm or less, between the bottom copper tube and the bottom plate of the aligned winding coil that will be unwound in order from the bottom to the top. Since the gap becomes small, such a problem of copper pipe feeding trouble is likely to occur.

  Further, in the stepped level wound coil as shown in FIG. 16, since the copper tube is densely overlapped with other copper tubes, when sticking occurs due to welding of the copper tubes during the final heat treatment, Long sticking occurs. For this reason, when the copper tube is fed out, the copper tube is difficult to peel off, which causes the copper tube to be broken, which causes a feeding trouble.

  In addition, in a copper pipe made of a pure copper soft material having a σ0.2 of less than 70 MPa, when the copper pipe is unwound, the copper pipe fed upward is straightened by the weight of the lower unrolled copper pipe. Because the coil diameter is reduced and the coil winding diameter is reduced and pulled toward the central axis of the coil, the copper pipe is separated from the coil winding line, so that it is not caught by the copper pipe inside the coil that has not yet been unwound. It is paid out. On the other hand, in a copper tube made of high-strength copper having a σ0.2 of 70 MPa or more, it is difficult for this self-weight to cause straightening. Therefore, the unrolled copper tube below has a spring-like spiral while maintaining the winding curvature. It becomes a pipe and is fed upward. Therefore, at the time of unwinding, the unrolled copper tube that is not yet unrolled easily catches unrolled copper tube with its curvature maintained.

  In addition, since the final heat treatment temperature is high in a copper tube made of high-strength copper, sticking due to fusion of the copper tubes during heat treatment is likely to occur, so that a feeding trouble due to sticking is likely to occur.

  Accordingly, an object of the present invention is to solve such a conventional problem, and when a copper tube is drawn out from a coil wound in multiple layers, the problem of the above-mentioned copper tube drawing trouble is unlikely to occur. It is providing the multilayer coil of the copper pipe which consists of these.

The above problems are solved by the present invention described below.
That is, the present invention (1) is a coil laminate in which a large number of spiral coils in which a copper tube is wound in a spiral shape are laminated in the extending direction of the central axis of the coil laminate,
A-layer spiral coil with the innermost side connected to the innermost side of the uppermost layer spiral coil and the outermost side connected to the outermost side of the lowermost layer spiral coil, and the outermost side spiral coil of the uppermost layer A B-layer spiral coil connected to the outermost side of the innermost layer and connected to the innermost side of the spiral coil of the lowermost layer on the innermost side,
The A layer spiral coil and the B layer spiral coil are alternately repeated,
The copper tube of the spiral coil of each layer is wound so that the radius of curvature continuously changes and the gap between adjacent copper tubes is smaller than the copper tube diameter,
The copper pipe is a copper pipe having a Cu content of 95% by mass or more and a 0.2% proof stress value σ0.2 of 70 MPa or more,
The spiral coil laminated body characterized by the above is provided.

Further, in the present invention (2), two or more spiral coil laminates of (1) are stacked in the extending direction of the central axis of the coil laminate,
The copper tubes of the upper and lower spiral coil laminates are connected by a connecting member,
A stack of spiral coil laminates is provided.

  According to the present invention, it is possible to provide a copper coil multilayer coil made of high-strength copper, which is less likely to cause the above-described problem of copper pipe feeding trouble when the copper pipe is fed out of a coil wound in multiple layers.

It is a typical perspective view of the form example of the spiral coil laminated body of this invention. It is a top view of the spiral coil laminated body shown in FIG. It is a side view of the spiral coil laminated body shown in FIG. It is sectional drawing of the spiral coil laminated body shown in FIG. It is a top view which shows the spiral coil of each layer in the spiral coil laminated body shown in FIG. It is sectional drawing and side view for one A layer spiral coil. It is sectional drawing and side view for one B layer spiral coil. It is a figure which shows the positional relationship of the ridgeline of A layer spiral coil, and the ridgeline of B layer spiral coil. It is a typical perspective view which shows a mode that the copper pipe is drawn | fed out from the spiral coil laminated body shown in FIG. It is typical sectional drawing which shows a mode that the copper pipe is drawn | fed out from the spiral coil laminated body shown in FIG. It is an enlarged view of the part shown with the code | symbol A in Fig.4 (a). It is a schematic diagram showing a stack of spiral coil stacks in which two spiral coil stacks are stacked in the extension direction of the central axis of the coil stack. It is a schematic diagram which shows a mode that the copper tube of an upper and lower spiral coil laminated body is connected by the connection member. It is a figure which shows a mode that the conventional level wand coil is produced. It is a figure which shows a mode that the conventional level wand coil is produced. It is a figure which shows the conventional level wand coil. It is a figure which shows a mode that a copper pipe is drawn out from the conventional level wand coil. It is a figure which shows a mode that a copper pipe is drawn out from the conventional level wand coil.

The spiral coil laminate of the present invention is a coil laminate in which a plurality of spiral coils in which a copper tube is spirally wound are laminated in the extending direction of the central axis of the coil laminate,
A-layer spiral coil with the innermost side connected to the innermost side of the uppermost layer spiral coil and the outermost side connected to the outermost side of the lowermost layer spiral coil, and the outermost side spiral coil of the uppermost layer A B-layer spiral coil connected to the outermost side of the innermost layer and connected to the innermost side of the spiral coil of the lowermost layer on the innermost side,
The A layer spiral coil and the B layer spiral coil are alternately repeated,
The copper tube of the spiral coil of each layer is wound so that the radius of curvature continuously changes and the gap between adjacent copper tubes is smaller than the copper tube diameter,
The copper pipe is a copper pipe having a Cu content of 95% by mass or more and a 0.2% proof stress value σ0.2 of 70 MPa or more,
It is a spiral coil laminated body characterized by these.

  The shape of the spiral coil laminate of the present invention will be described with reference to FIGS. FIG. 1 is a schematic perspective view of an embodiment of the spiral coil laminate of the present invention. FIG. 2 is a plan view of the spiral coil laminate shown in FIG. FIG. 3 is a side view of the spiral coil laminate shown in FIG. 1, FIG. 3 (a) is a view seen from the direction of the arrow indicated by reference numeral 11 in FIG. 2, and FIG. It is the figure seen from the direction of the arrow shown with the code | symbol 12 in FIG. 4 is a cross-sectional view of the spiral coil laminate shown in FIG. 1, FIG. 4 (a) is a cross-sectional view taken along line xx in FIG. 1, and FIG. 4 (b) is a cross-sectional view of y in FIG. FIG. FIG. 5A is a plan view showing the spiral coil of each layer in the spiral coil laminate shown in FIG. 1, and FIG. 5A (a) is a view of one A-layer spiral coil taken out, and FIG. ) Is a diagram showing one B-layer spiral coil taken out, the left is a plan view of the spiral coil, and the right is a diagram showing the ridge line of the copper tube. The upper part of FIG. 5B is a cross-sectional view of one A layer spiral coil, and the lower part of FIG. 5B is a side view of one A layer spiral coil. The upper part of FIG. 5C is a cross-sectional view of one B-layer spiral coil, and the lower part of FIG. 5C is a side view of one B-layer spiral coil. FIG. 6 is a diagram showing the positional relationship between the ridge line of the A layer spiral coil and the ridge line of the B layer spiral coil in the spiral coil laminate.

  As shown in FIGS. 1 to 4, the spiral coil laminate 1 is made of one continuous copper tube 2, and the spiral coil 3 in which the copper tube 2 is spirally wound is a coil laminate. This is a coil laminate in which a large number of layers are laminated in the extending direction 13 of the central axis. That is, the spiral coil laminate 1 is made of a continuous copper tube 2 from the uppermost spiral coil to the lowermost spiral coil.

  The spiral coil laminate 1 includes two types of spiral coils, that is, an A layer spiral coil 3a and a B layer spiral coil 3b, and the A layer spiral coil 3a and the B layer extend in the extending direction 13 of the central axis of the coil laminate. The spiral coil 3b is alternately and repeatedly stacked.

  As shown in FIG. 5, the A-layer spiral coil 3a has the innermost 5a connected to the innermost 5b of the uppermost spiral coil and the outermost 4a to the outermost 4b of the lowermost spiral coil. It is connected. In the B-layer spiral coil 3b, the outermost side 4b is connected to the outermost side 4a of the uppermost spiral coil and the innermost side 5b is connected to the innermost side 5a of the lowermost spiral coil.

  As shown in FIG. 5A (a), when the copper tube 2a of the A layer spiral coil 3a is viewed from above, it is spiral from the innermost 5a to the outermost 4a. Further, as shown in the right diagram of FIG. 5A (a), in the A layer spiral coil 3a, the radius of curvature of the copper tube 2a continuously changes, and the gap between the adjacent copper tubes 2a is a copper tube. It is smaller than the diameter.

  Also, as shown in FIGS. 4A and 5B, when the copper tube 2a of the A layer spiral coil 3a is viewed from the side, the portion from the position 7a to the outermost 4a is the same position in the vertical direction. It is wound in a spiral. Further, since the innermost 5a is connected to the B layer spiral coil 3b of the uppermost layer, the innermost 5a is at the same position in the vertical direction as the B layer spiral coil 3b of the uppermost layer, and from there The position of the copper tube is gradually lowered, and at the position 7a, the position from the position 7a to the outermost 4a becomes the same position in the vertical direction. Therefore, the innermost side of the A layer spiral coil 3a is a position where the vertical position of the copper tube of the B layer spiral coil 3b of the layer one above starts to fall, and the outermost side of the A layer spiral coil 3a. Is the position immediately before the position in the vertical direction starts to drop toward the B layer spiral coil 3b, which is one layer below the copper tube. And from the innermost side 5a to the outermost side 4a is the A layer spiral coil 3a.

  As shown in FIG. 5A (b), when the copper tube 2b of the B layer spiral coil 3b is viewed from above, it is spiral from the innermost 5b to the outermost 4b. Further, as shown in the right diagram of FIG. 5A (b), in the B layer spiral coil 3b, the radius of curvature of the copper tube 2b continuously changes, and the gap between adjacent copper tubes 2b is a copper tube. It is smaller than the diameter.

  Further, as shown in FIGS. 3A and 5C, when the copper tube 2b of the B layer spiral coil 3b is viewed from the side, the portion from the innermost 5b to the position 6b is the same in the vertical direction. It is wound in a spiral. Further, since the outermost 4b is connected to the A layer spiral coil 3a of the uppermost layer, the outermost 4b is at the same position in the vertical direction as the A layer spiral coil 3a of the uppermost layer, and from there The position of the copper tube is gradually lowered, and at the position 6b, it becomes the same position in the vertical direction as the portion from the innermost 5b to the position 6b. Therefore, the outermost side of the B layer spiral coil 3b is a position where the vertical position of the copper tube of the A layer spiral coil 3a in the upper layer starts to fall, and the innermost side of the B layer spiral coil 3b. Is a position immediately before the vertical position of the copper tube starts to drop toward the layer A spiral coil 3a, which is one layer below. And the outermost 4b to the innermost 5b is the B layer spiral coil 3b.

  In the spiral coil laminate 1, the interval between adjacent copper tubes 2a of the A layer spiral coil 3a and the interval between adjacent copper tubes 2b of the B layer spiral coil 3b do not necessarily have to be equal, and the A layer spiral coil 3a. The interval between adjacent copper tubes 2a and the interval between adjacent copper tubes 2b of the B layer spiral coil 3b may or may not be equal.

  As shown in FIG. 5A, the A-layer spiral coil 3a and the B-layer spiral coil 3b are spirally reversed when viewed from the innermost positions 5a and 5b where both are connected. Therefore, theoretically, the ridge line of the copper tube 2a of the A-layer spiral coil 3a and the ridge line of the copper tube 2b of the B-layer spiral coil 3b do not overlap in a linear shape but intersect. FIG. 6 is a diagram showing the overlap between the A layer spiral coil 3a and the B layer spiral coil 3b, where the ridge line of the copper tube 2a of the A layer spiral coil 3a is a solid line and the ridge line of the copper tube 2b of the B layer spiral coil 3b Is indicated by a dotted line. For this reason, in the actual spiral coil laminate, the overlapping portion of the copper tube 2a of the A layer spiral coil 3a and the copper tube 2b of the B layer spiral coil 3b is very small.

  The manner in which the copper tube 2 is unwound from the spiral coil laminate 1 and the coil is unwound will be described with reference to FIGS. FIG. 7 is a schematic perspective view showing a state in which the copper tube is drawn out from the spiral coil laminate shown in FIG. FIG. 8 is a schematic cross-sectional view showing a state in which a copper tube is drawn out from the spiral coil laminate shown in FIG. 1, and is a diagram showing a half on one side of the cross section of the spiral coil laminate. As shown in FIG. 7, the spiral coil laminate 1 is placed on the floor plate 16 so that the extension direction of the central axis of the coil laminate is a vertical direction, and is unwound in order from the layer above the spiral coil. It is burned. Then, as shown in FIG. 8, the A layer spiral coil 3a is unwound in order from the inner side to the outer side as indicated by an arrow, and is fed to the outermost copper tube 2a of the A layer spiral coil 3a. Then, the B layer spiral coil 3b, which is the layer below the A layer spiral coil 3a, is unwound in order from the outside to the inside as indicated by the arrows, and the most of the B layer spiral coil 3b When the inner copper tube 2b is drawn out, the A layer spiral coil is subsequently unwound in order from the inner side to the outer side, and then the B layer spiral coil is unwound in order from the outer side to the inner side. It will be repeated. At this time, as shown in FIG. 6, it is always the uppermost copper tube 2 that is drawn out, and the lowermost copper tube is not drawn out unlike the level wound coil.

  All the spiral coil laminates of the present invention are made of one continuous copper tube. The copper tube forming the spiral coil laminate of the present invention is a copper tube having a Cu content of 95% by mass or more and a 0.2% proof stress value σ0.2 of 70 MPa or more, and is a seamless copper tube. The Cu content of the copper constituting the copper tube is 95% by mass or more, preferably 99% by mass or more. Moreover, 0.2% yield strength value (sigma) 0.2 of the copper which comprises a copper pipe is 70 Mpa or more. In addition, the higher the 0.2% proof stress value σ0.2 of the copper constituting the copper tube, the more easily the effect of the present invention appears. The 0.2% proof stress value σ0.2 of the copper constituting the copper tube is particularly Although not limited, the upper limit value of 0.2% proof stress value σ0.2 of copper constituting the copper tube is usually about 320 MPa. The copper constituting the copper tube can contain various alloy components such as Sn, Zr, P, Fe, Cr, Ni, Co, Ti, and Mn as long as the copper content is not less than the above range. . Moreover, in copper which comprises a copper pipe, inclusion of inevitable impurities, such as O, H, and S, is accept | permitted besides the above.

As copper constituting the copper tube, for example,
・ Phosphorus deoxidized copper (JIS H3300 C1220) semi-hard material (σ0.2: 230 MPa or more)
・ Soft material of JIS H3300 C1565 (σ0.2: 70 to 105 MPa)
・ 1/2 hard material of JIS H3300 C1565 (σ0.2: 120 to 265 MPa)
-3/4 hard material of JIS H3300 C1565 (σ0.2: 130-310 MPa)
・ Soft material of JIS H3300 C1862 (σ0.2: 105 to 160 MPa)
・ 1/2 hard material of JIS H3300 C1862 (σ0.2: 135-300 MPa)
・ 3/4 hard material of JIS H3300 C1862 (σ0.2: 145-335 MPa)
・ Soft material of JIS H3300 C5010 (σ0.2: 70 to 90 MPa)
・ 1/2 hard material of JIS H3300 C5010 (σ0.2: 120 to 270 MPa)
-3/4 hard material of JIS H3300 C1565 (σ0.2: 130-310 MPa)
-Soft material of JIS H3300 C5015 (σ0.2: 100 to 140 MPa)
・ 1/2 hard material of JIS H3300 C5015 (σ0.2: 110-290 MPa)
・ 3/4 hard material of JIS H3300 C5015 (σ0.2: 140 to 300 MPa)
Examples thereof include copper having a Cu content of 99% by mass or more.
Moreover, as copper which comprises a copper pipe, for example,
Cu-0.05 to 1.0 mass% P-based copper alloy (σ0.2: 70 to 160 MPa)
Cu-0.01 to 0.06% Fe-0.004 to 0.040% P-based copper alloy (σ0.2: 70 to 95 MPa)
Cu-0.04-0.06% Ni-0.004-0.040% P-based copper alloy (σ0.2: 70-90 MPa)
Cu-0.02-0.5% Cr-0.015-0.05% P-based copper alloy (σ0.2: 70-160 MPa)
Examples thereof include copper having a Cu content of 99% by mass or more.
Moreover, as copper which comprises a copper pipe, for example,
Cu-0.80-1.20% Fe-0.20-0.40% P-based copper alloy (σ0.2: 80-140 MPa)
Cu-0.4-3.5% Ni-0.1-0.5% P-based copper alloy (σ0.2: 90-160 MPa)
Cu-0.80 to 1.20% Ti-0.015 to 0.10% P-based copper alloy (σ0.2: 80 to 150 MPa)
Cu-0.35 to 1.20% Co-0.20 to 0.50% P-based copper alloy (σ0.2: 80 to 150 MPa)
Cu-0.40 to 1.20% Mn-0.20 to 0.40% P-based copper alloy (σ0.2: 80 to 150 MPa)
Cu-0.58 to 0.72% Sn-0.005 to 0.35% Zr-0.004 to 0.040P-based copper alloy (σ0.2: 70 to 130 MPa)
Examples thereof include copper having a Cu content of 95% by mass or more.

  The spiral coil laminate of the present invention is a coil laminate in which a spiral coil in which a copper tube is wound in a spiral shape is laminated in the extension direction of the central axis of the coil laminate. It consists of a spiral coil, that is, an A layer spiral coil and a B layer spiral coil, and the A layer spiral coil and the B layer spiral coil are alternately and repeatedly stacked in the extending direction of the central axis of the coil laminate. Therefore, in the spiral coil laminate of the present invention, the copper tube is connected to the other copper of the copper tube in the spiral coil in the lowermost layer from the end of the copper tube in the spiral coil in the uppermost layer. Continuous to the end of the tube. The spiral shape means the shape of the copper tube when the spiral coil of each layer is viewed from above.

  In the A-layer spiral coil, the innermost side is connected to the innermost side of the uppermost spiral coil and the outermost side is connected to the outermost side of the lowermost spiral coil. In addition, the outermost layer of the B layer spiral coil is connected to the outermost side of the spiral coil of the uppermost layer, and the innermost side is connected to the innermost side of the spiral coil of the lowermost layer.

  When the outermost position where the A layer spiral coil and the B layer spiral coil below it are connected is seen as the starting point, both are spirals in the reverse direction, and the B layer spiral coil When the innermost position where the lower layer A spiral coil is connected is viewed as the starting point, the two spirals are reversed. In the embodiment shown in FIG. 5A, the A layer spiral coil is wound in a left-handed spiral and the B layer spiral coil is wound in a right-handed spiral, starting from the innermost position. In the spiral coil laminate of the present invention, the A layer spiral coil is wound in the left-handed spiral and the B layer spiral coil is the right-handed spiral in the innermost position. Or the A-layer spiral coil is wound in a right-handed spiral and the B-layer spiral coil is wound in a left-handed spiral, starting from the innermost position. Also good. Even when the outermost position of the A layer spiral coil and the B layer spiral coil is used as the starting point, the A layer spiral coil and the B layer spiral coil are reversed.

  The A-layer spiral coil is composed of a portion that is wound while the position in the vertical direction is gradually lowered, and a portion that is wound in a spiral shape at the same position in the vertical direction. In the example shown in FIG. 5A, the portion from the innermost side 5a to the position 7a corresponds to a portion wound while the position in the vertical direction is gradually lowered, and the portion from the position 7a to the outermost side 4a is It corresponds to a portion wound in a spiral shape at the same vertical position. In the spiral coil laminate of the present invention, the portions wound in a spiral shape at the same position in the vertical direction form each layer, so that the vertical direction of the A layer spiral coil is wound in a spiral shape at the same position. The position in the up-and-down direction of the portion is the position of the A layer. Similarly, in the B layer spiral coil, the position in the vertical direction of the portion of the B layer spiral coil that is spirally wound at the same vertical position is defined as the B layer position. Therefore, when the copper tube of the A-layer spiral coil is viewed from the side, the innermost vertical position of the copper tube of the A-layer spiral coil is the same as the position of the B layer one layer above, and the copper tube from there The position of is gradually lowered, and the outer diameter of the copper tube is lowered by one to the position of the A layer. And the position of the up-down direction of a copper pipe is the same from the place which fell to the position of A layer to the outermost side. That is, the innermost side of the A layer spiral coil is a position where the vertical position of the copper tube starts to drop from the position of the B layer of the B layer spiral coil of the upper layer toward the position of the A layer. The outermost side of the A layer spiral coil is a position immediately before the vertical position of the copper tube starts to drop toward the position of the B layer of the B layer spiral coil which is one layer below. In the example shown in FIG. 4, the vertical position of the copper tube is lowered from the position of the B layer to the position of the A layer over about 180 ° from the innermost position with a central angle centered on the center of the spiral. However, it is not limited to this, and is appropriately selected within a range not impairing the effects of the present invention. In the spiral coil laminate of the present invention, the vertical position of the copper tube extends from the position of the B layer to the A layer over 90 to 270 ° at a central angle centered on the center of the spiral from the innermost position. It is preferable that it is lowered to the position.

  Further, the B layer spiral coil is composed of a portion that is wound while the position in the vertical direction is gradually lowered, and a portion that is wound in a spiral shape at the same position in the vertical direction. In the example shown in FIG. 5A, the portion from the outermost 4b to the position 6b corresponds to a portion wound while the vertical position gradually decreases, and the portion from the position 6b to the innermost 5b is It corresponds to a portion wound in a spiral shape at the same vertical position. Therefore, when the copper tube of the B layer spiral coil is viewed from the side, the outermost vertical position of the copper tube of the B layer spiral coil is the same position as the position of the A layer one level above, and the copper tube from there Is gradually lowered, and is lowered by one outer diameter of the copper pipe to the position of the B layer. And the position of the up-down direction of a copper pipe is the same from the place which fell to the position of B layer to the innermost side. That is, the outermost side of the B layer spiral coil is a position where the vertical position of the copper tube starts to fall from the position of the A layer of the A layer spiral coil of the layer one above to the position of the B layer. The innermost side of the B layer spiral coil is the position immediately before the vertical position of the copper tube starts to drop toward the position of the A layer of the A layer spiral coil that is one layer below. In the embodiment shown in FIG. 3, the vertical position of the copper tube is lowered from the position of the A layer to the position of the B layer over about 180 ° from the outermost position with a central angle centered on the center of the spiral. However, it is not limited to this, and is appropriately selected within a range not impairing the effects of the present invention. In the spiral coil laminate of the present invention, the vertical position of the copper tube extends from the position of the A layer to the B layer over a 90 to 270 ° center angle centered on the center of the spiral from the outermost position. It is preferable that it is lowered to the position.

  In the A layer spiral coil, the radius of curvature of the copper pipe is continuously changed, and the gap between adjacent copper pipes is wound so as to be smaller than the diameter of the copper pipe. Similarly, in the B layer spiral coil, the radius of curvature of the copper tube is continuously changed, and the gap between adjacent copper tubes is wound so as to be smaller than the diameter of the copper tube.

  The spiral shape of the copper tube of the spiral coil laminate of the present invention theoretically means that the radius of curvature of the copper tube continuously changes and the gap between adjacent copper tubes is smaller than the copper tube diameter. The shape refers to a shape, but if it does not impair the effect of the present invention, a shape approximate to that is also included in the spiral coil laminate of the present invention. That is, as long as the effect of the present invention is not impaired, there are places where the radius of curvature of the copper pipe does not continuously change, or the gap between adjacent copper pipes is larger than the copper pipe diameter. There may be places.

  The copper tube forming the spiral coil laminate of the present invention is a heat transfer copper tube used as a heat exchanger for air conditioners such as room air conditioners and packaged air conditioners, a heat transfer copper tube such as a refrigerator, or a refrigerant copper distribution tube. A smooth copper tube or an internally grooved copper tube.

  The outer diameter of the copper tube is not particularly limited, but is preferably 3 to 13 mm, particularly preferably 3 to 10 mm. In particular, in the spiral coil laminate of the present invention, even if the outer diameter of the copper tube forming the spiral coil laminate is as small as 3 to 7 mm, troubles in feeding out the copper tube hardly occur.

  The number of turns of the copper tube per A-layer spiral coil or B-layer spiral coil is not particularly limited, but is preferably 10-200, particularly preferably 30-60.

  In the embodiment shown in FIG. 1, the spiral coil laminate is the layer of the A-layer spiral coil at the top, and in turn, B layer, A layer, B layer, A layer, B layer,. The bottom layer is the layer of the A layer spiral coil, but the layer is not limited to this, and the A layer spiral coil and the B layer spiral coil are alternately stacked. If so, the uppermost layer may be an A-layer spiral coil or a B-layer spiral coil, and the lowermost layer may be an A-layer spiral coil or a B-layer spiral coil.

  In the spiral coil laminate of the present invention, since there is no spiral coil layer above the top spiral coil layer, the copper coil of the top spiral coil layer is the spiral of the upper layer. It is not connected to the coil layer. Therefore, in the spiral coil laminate of the present invention, the spiral coil in the uppermost layer may not have a portion that gradually decreases from the vertical position.

  In the spiral coil laminate of the present invention, the total number of layers of the A layer spiral coil and the B layer spiral coil is not particularly limited, but is preferably 10 to 250, particularly preferably 20 to 80.

In the A-layer spiral coil according to the spiral coil laminate of the present invention, a gap is formed between adjacent copper tubes. In the B layer spiral coil according to the spiral coil laminate of the present invention, a gap is formed between adjacent copper tubes. And in the spiral coil laminated body of this invention, ratio of the clearance gap between copper tubes with respect to the outer diameter of a copper tube becomes like this. Preferably it is 0.01 or more and less than 1.0, Most preferably, it is 0.05-0.2. When the ratio of the gap between the copper pipes with respect to the outer diameter of the copper pipe is in the above range, the copper pipe of the upper layer or the lower layer is difficult to enter between the copper pipes. In addition, ratio (p) of the clearance gap between copper pipes with respect to the outer diameter of a copper pipe is computed by the following formula | equation (1).
p = (W−d × n) / (n−1) (1)
In the formula (1), W is the width of one half of the cross section of the spiral coil, is the length indicated by the symbol W in FIG. 4, d is the outer diameter of the copper tube, and n is the spiral It is the number of copper tubes existing on one half of the cross section of the coil.

  In addition, in this invention, as shown in FIG. 9, the space | interval of adjacent copper tubes is the distance between the centers of adjacent copper tubes in the cross section cut by the surface perpendicular | vertical to the copper tube axial direction of a copper tube. (Reference numeral 8). The interval between the adjacent copper tubes is equal to the distance between the ridge lines of the copper tubes. Further, in the present invention, the gap between the copper pipes, as shown in FIG. 9, is a gap formed between adjacent copper pipes (symbol 9) in a cross section cut by a plane perpendicular to the copper pipe axial direction of the copper pipe. Point to. FIG. 9 is an enlarged view of a portion (symbol A) surrounded by a dotted line in FIG.

(In FIG. 4, the length indicated by reference numeral D1) the outer diameter of the spiral coil (in FIG. 4, the length indicated by a symbol D ₂₎ the inner diameter of and a spiral coil, appropriately selected depending on the outer diameter and number of turns of copper pipe However, the outer diameter of the spiral coil is preferably 800 to 1500 mm, particularly preferably 1000 to 1100 mm, and the inner diameter of the spiral coil is preferably 300 to 1000 mm, particularly preferably 500 to 700 mm.

  In the spiral coil laminate of the present invention, the A-layer spiral coil and the B-layer spiral coil are in a reverse spiral when viewed from the position where both are connected, theoretically, The ridge line of the copper tube of the A layer spiral coil intersects the ridge line of the copper tube of the B layer spiral coil without overlapping in a linear shape. For this reason, in the actual spiral coil laminate, there are very few overlapping portions of the ridge line of the copper tube of the A layer spiral coil and the ridge line of the copper tube of the B layer spiral coil. Therefore, even if sticking due to welding of copper tubes occurs during the final heat treatment, unlike the conventional step-down level wound coil, it is unlikely that the copper tube sticks linearly, so the spiral coil of the present invention Although the laminate is a coil laminate of a copper tube made of high-strength copper, it is difficult to cause a trouble of feeding out the copper tube due to the linear sticking of the copper tube.

  Further, in the spiral coil laminate of the present invention, the copper coil in the spiral coil laminate of the present invention seems to be loaded from the other copper tube from the top because it is unwound in order from the spiral coil of the upper layer. It will not be paid out in a bad state. Therefore, in the spiral coil laminated body of the present invention, when the copper pipe is drawn out, there is no trouble of drawing out the copper pipe due to the resistance of the floor plate, such as a step-down level wand coil. Further, in the spiral coil laminate of the present invention, for example, when unwinding, it is difficult for straightening due to its own weight, so that the unrolled copper tube below becomes a spring-like spiral tube while maintaining the winding curvature. Even if it is fed upward, there is no catch at the time of feeding, so that a feeding trouble is likely to occur.

In the stack of the spiral coil laminate of the present invention, the spiral coil laminate of the present invention is stacked two or more in the extending direction of the central axis of the coil laminate,
The copper tubes of the upper and lower spiral coil laminates are connected by a connecting member,
Is a stack of spiral coil laminates.

  FIG. 11 shows a stack of spiral coil stacks in which two spiral coil stacks 1a and 1b are stacked in the extending direction of the central axis of the coil stack. The spiral coil laminate of the present invention is usually unwound after being placed in the place where the copper tube is used in a state where two to three are stacked in the extension direction of the central axis of the coil laminate.

  At this time, as shown in FIG. 12 (a), the copper tube end of the copper tube 2a of the spiral coil in the lowermost layer of the upper spiral coil laminate and the first spiral coil laminate in the lower layer. The copper tube 2b of the upper spiral coil is brought close to the copper tube end, and then, as shown in FIG. 12B, the upper spiral coil laminated copper tube 2a and the lower spiral coil are connected by the connecting member 17. The copper tube 2b of the laminated body is connected. FIG. 12 is a schematic diagram showing a state in which the copper tubes of the upper and lower spiral coil laminates are connected by a connecting member.

  When unwinding two or more spiral coil laminates connected by a connecting member, the connecting member absorbs the torsion of the copper-copper tube by the connecting member, so that the connecting member uses a tube having a certain torsional strength. it can. For example, a vinyl chloride tube, a resin tube, a copper tube, or the like can be used.

  And the spiral coil laminated body of the present invention is stacked two or more in the extension direction of the central axis of the coil laminated body, and the copper tubes of the upper and lower spiral coil laminated bodies are connected by connecting members, After all the copper tubes of the spiral coil laminate are drawn out, the copper tubes of the lower spiral coil laminate are drawn out continuously without interruption.

DESCRIPTION OF SYMBOLS 1 Spiral coil laminated body 2, 2a, 2b, 22 Copper tube 3a A layer spiral coil 3b B layer spiral coil 4a, 4b The outermost side 5a of a spiral coil, 5b The innermost side of a spiral coil 8 The space | interval 9 between adjacent copper tubes 9 Copper Clearance between tubes 13 Center axis 16 of coil laminate Base plate 17 Connecting member 20 Level wound coil 21 Bobbin 23a, 23b, 27a, 27b Aligned winding coil 24 Bobbin inner cylinder 33 Extension direction of center axis of level wound coil D ₁ spiral Outer diameter D of coil ₂ Inner diameter W of spiral coil One half width of spiral coil

Claims (4)

A spiral coil in which a copper tube is wound in a spiral shape is a coil laminate in which a large number of layers are laminated in the extending direction of the central axis of the coil laminate,
A-layer spiral coil with the innermost side connected to the innermost side of the uppermost layer spiral coil and the outermost side connected to the outermost side of the lowermost layer spiral coil, and the outermost side spiral coil of the uppermost layer A B-layer spiral coil connected to the outermost side of the innermost layer and connected to the innermost side of the spiral coil of the lowermost layer on the innermost side,
The A layer spiral coil and the B layer spiral coil are alternately repeated,
The copper tube of the spiral coil of each layer is wound so that the radius of curvature continuously changes and the gap between adjacent copper tubes is smaller than the copper tube diameter,
The copper pipe is a copper pipe having a Cu content of 95% by mass or more and a 0.2% proof stress value σ0.2 of 70 MPa or more,
A spiral coil laminate characterized by the following.   The spiral coil laminate according to claim 1, wherein a ratio of a gap between the copper tubes to an outer diameter of the copper tubes is 0.01 or more and less than 1.0.   The ratio of the clearance gap between the said copper tubes with respect to the outer diameter of the said copper tube is 0.05-0.2, The spiral coil laminated body of any one of Claim 1 or 2 characterized by the above-mentioned. Two or more spiral coil laminates according to any one of claims 1 to 3 are stacked in the extending direction of the central axis of the coil laminate,
The copper tubes of the upper and lower spiral coil laminates are connected by a connecting member,
A stack of spiral coil laminates characterized by

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