CN212320473U - High-efficient cooling body of two refrigerants - Google Patents

Abstract

The utility model belongs to the technical field of heat exchange device, in particular to a double-refrigerant high-efficiency cooling mechanism, which comprises a fin group and a pipeline which is arranged on the fin group in a penetrating way and is used for the flowing of refrigerant, wherein the pipeline is a double-layer pipe and comprises an outer pipe and an inner pipe which is arranged in the pipe cavity of the outer pipe in a penetrating way, the inner pipe is used for transmitting the refrigerant with high boiling point, and the area between the inner pipe and the outer pipe is used for transmitting the refrigerant with low; the through hole on the fin is connected with a supporting cylinder, the top circumference of the supporting cylinder is expanded outwards to form a flanging, the circumference close to the circumference of the through hole on the fin is upwards protruded to form a step, and the structure on the other side of the step is matched with the shape of the flanging on the fin below.

Description

High-efficient cooling body of two refrigerants

Technical Field

The utility model belongs to the technical field of heat exchange device, in particular to high-efficient cooling body of two refrigerants.

Background

The fin cooling mechanism mainly comprises fins and cooling pipelines penetrating the fins, a refrigerant flows in the cooling pipelines, hot fluid (hot gas) flows through the surfaces of the fins, in the process, the heat of the hot fluid is transferred to the refrigerant in the cooling pipelines through the fins and the cooling pipelines, the refrigerant in the cooling pipelines flows all the time and takes away the heat, namely, the heat exchange between the refrigerant and the hot fluid is completed, and the temperature of the hot fluid is reduced.

The selection of the refrigerant has a great influence on the cooling effect, and different refrigerants have respective advantages and disadvantages, for example, when freon is used as the refrigerant, freon has strong heat absorption capacity but limited heat capacity, so that after absorbing a certain amount of heat, the refrigerant can reach a state similar to saturation soon, and the subsequent heat absorption can not be continued.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a double-refrigerant high-efficiency cooling mechanism, which comprises a fin group and a pipeline which is arranged on the fin group in a penetrating way and is used for the flowing of the refrigerant,

the pipeline is a double-layer pipe and comprises an outer pipe and an inner pipe which is arranged in a pipe cavity of the outer pipe in a penetrating way, the inner pipe is used for transmitting a refrigerant with a high boiling point, the area between the inner pipe and the outer pipe is used for transmitting a refrigerant with a low boiling point, the high boiling point and the low boiling point are relatively speaking,

the cooling mechanism also comprises a high boiling point refrigerant storage tank, a low boiling point refrigerant storage tank, a first condenser, a second condenser, a first pump body and a second pump body,

the high boiling point refrigerant storage box conveys high boiling point refrigerants to the first condenser and the inner pipe in sequence through the first circulating pipeline and then conveys the high boiling point refrigerants back to the high boiling point refrigerant storage box, the first pump body is arranged on the first circulating pipeline,

the low boiling point refrigerant storage box conveys the low boiling point refrigerant to the area among the second condenser, the inner pipe and the outer pipe in sequence through the second circulating pipeline and then conveys the low boiling point refrigerant back to the low boiling point refrigerant storage box, the second pump body is arranged on the second circulating pipeline,

the fin group comprises a plurality of fins which are arranged, a plurality of through holes which penetrate through the upper and lower surfaces of the fins are distributed on the fins, the pipeline sequentially penetrates through each fin through the through holes, a first supporting cylinder which is coaxially arranged with the through holes and is provided with openings along the axial direction of the pipeline is connected to the upper surface of each fin and is positioned at the through holes, the pipeline coaxially penetrates through the first supporting cylinder, the periphery of the top of the first supporting cylinder is expanded outwards to form a flanging,

the bottom of the first supporting cylinder is connected with the through hole through an annular step, the annular step is coaxially arranged with the first supporting cylinder and/or the through hole, the annular step comprises a horizontal annular sheet, the periphery of the horizontal annular sheet extends vertically downwards to form a second supporting cylinder with two open ends along the axial direction of the second supporting cylinder, the periphery of the bottom of the second supporting cylinder is connected to the edge of the through hole along the circumferential direction, the inner edge of the horizontal annular sheet is connected to the periphery of the bottom of the first supporting cylinder along the circumferential direction,

between the fins which are arranged adjacently up and down, the turned-over edge on the lower fin is wholly vertically and upwards embedded into a groove which is formed by the lower surface of the upper horizontal ring-shaped fin and the inner cylindrical surface of the second supporting cylinder,

wherein the turned-over edge is obliquely arranged from bottom to top outwards,

the outer pipe body of the pipeline is tightly attached to the inner cylindrical surface of the first supporting cylinder along the radial direction, the outer circumference and the inner cylindrical surface.

Drawings

FIG. 1 is a schematic view of the connection structure of the dual-refrigerant high-efficiency cooling mechanism of the present invention,

FIG. 2 is a cross-sectional view of the dual-coolant cooling mechanism of the present invention, in which the tubes are inserted into the fin sets,

figure 3 is a structural cross-sectional view of the fin of the present invention,

fig. 4 is a schematic view (cross-sectional view) of the assembly structure between the fins of the present invention, in order to distinguish two fins more clearly, one of the two fins adjacent to each other up and down in the figure has hatching (oblique lines) filled therein, the other has no structure, the same is shown below (the inner tube 2 is not shown),

figure 5 is an enlarged schematic view of the circled portion of figure 4 (inner tube 2 not shown),

FIG. 6 is a schematic diagram showing the relative positions of two adjacent fins when the fins of the present invention are assembled without annular steps and flanges, and pressed together, for comparison (the inner tube 2 is not shown),

FIG. 7 is a schematic diagram showing the relative positions of two adjacent fins when the fins of the present invention are assembled without annular steps, and this is used as a comparison (the inner tube 2 is not shown),

the heat exchanger comprises 1-an outer pipe, 2-an inner pipe, 3-a high boiling point refrigerant, 4-a low boiling point refrigerant, 5-a high boiling point refrigerant storage tank, 6-a low boiling point refrigerant storage tank, 7-a first condenser, 8-a second condenser, 9-a first circulation pipeline, 91-a first pump body, 10-a second circulation pipeline, 101-a second pump body, 11-a fin, 111-a through hole, 12-a first supporting cylinder, 121-a flanging, 13-an annular step, 131-a horizontal annular sheet, 132-a second supporting cylinder, 14-an outer pipe connecting bent pipe and 15-an inner pipe connecting bent pipe.

Detailed Description

It should be noted that the terms "upper", "lower", "vertical" and "horizontal" used in the description of the present invention refer to directions in the accompanying drawings 3, 4, 5, 6 and 7, and the terms "inner" and "outer" refer to directions toward and away from the geometric center of a particular component, respectively. These are merely for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the invention.

As shown in the attached drawings, the double-refrigerant high-efficiency cooling mechanism of the utility model comprises a fin set, a pipeline which is arranged on the fin set in a penetrating way and used for the flowing of the refrigerant, a high boiling point refrigerant storage tank 5, a low boiling point refrigerant storage tank 6, a first condenser 7, a second condenser 8, a first pump body 91 and a second pump body 101,

the pipeline is a double-layer pipe and comprises an outer pipe 1 and an inner pipe 2 penetrating through the pipe cavity of the outer pipe 1, the inner pipe 2 is used for transmitting high boiling point refrigerant 3 water, the area between the inner pipe 2 and the outer pipe 1 is used for transmitting low boiling point refrigerant 4 Freon (gas state),

the high boiling point refrigerant storage tank 5 sequentially conveys the high boiling point refrigerant 3 to the first condenser 7 and the inner pipe 2 through the first circulation pipeline 9 and under the action of the first pump 91, and then conveys the high boiling point refrigerant back to the high boiling point refrigerant storage tank 5, the first pump 91 is arranged on the first circulation pipeline 9,

the low boiling point refrigerant storage tank 6 sequentially conveys the low boiling point refrigerant 4 to the area among the second condenser 8, the inner pipe 2 and the outer pipe 1 through a second circulation pipeline 10 under the action of a second pump body 101, and then conveys the low boiling point refrigerant back to the low boiling point refrigerant storage tank 6, and the second pump body 101 is arranged on the second circulation pipeline 10;

on the other hand, the fin group comprises a plurality of fins 11 which are arranged, each fin 11 is arranged in an up-down opposite manner and is parallel to the approaching surface, a plurality of through holes 111 which penetrate through the upper surface and the lower surface of each fin 11 are distributed on each fin 11, the pipeline (the outer pipe 1) sequentially penetrates through each fin 11 through the through holes 111, a first supporting cylinder 12 which is coaxial with the through holes 111 and is provided with openings along the axial direction of the pipeline is connected on the upper surface of each fin 11, the pipeline (the outer pipe 1 comprises an inner pipe 2) coaxially penetrates through the first supporting cylinder 12 (the pipe body of the outer pipe 1 of the pipeline is tightly attached to the inner cylindrical surface of the first supporting cylinder (12) along the radial outward circumferential direction), the top circumference of the first supporting cylinder 12 is expanded outwards to form a flanging 121, and the flanging is arranged obliquely from bottom to top,

the bottom of the first supporting cylinder 12 is connected with the through hole 111 through the annular step 13, the annular step 13 is coaxially arranged with the first supporting cylinder 12 and/or the through hole 111, the annular step 13 comprises a horizontal annular sheet 131, the periphery of the horizontal annular sheet 131 vertically extends downwards to form a second supporting cylinder 132 with two open ends along the axial direction, the periphery of the bottom of the second supporting cylinder 132 is connected to the edge of the through hole 111 along the circumferential direction, the inner edge of the horizontal annular sheet 131 is connected to the periphery of the bottom of the first supporting cylinder 12 along the circumferential direction, wherein the fin 11, the annular step 13, the first supporting cylinder 12 and the flanging 121 are integrally formed,

between the fins 11 arranged adjacently up and down, the turned-over edge 121 on the lower fin 11 is wholly vertically and upwardly just embedded into the groove surrounded by the lower surface of the horizontal ring-shaped piece 131 on the upper fin 11 and the inner cylindrical surface of the second supporting cylinder 132.

Many prior art are used to use water as a single refrigerant, as seen in fig. 2: assuming that a single water cooling medium is used in the pipe instead of the double-layer pipe in fig. 2, and the water has a high heat capacity but a slow heat absorption rate (far less than ideal freon), the heat quantity absorbed and trapped by the water cooling medium in the hot air is very limited after the hot air is blown through the fins 11,

therefore, the refrigerant transmission pipeline arranged on the fin group in a penetrating way is divided into the outer pipe 1 and the inner pipe 2, water flows in the inner pipe 2 as a refrigerant, the other refrigerant Freon flows in the area between the inner pipe 2 and the outer pipe 1, the outer pipe 1 is directly contacted with the fins 11 and blown hot air, so that the Freon in the area between the inner pipe 2 and the outer pipe 1 exchanges heat with the hot air through the fins 11 before the refrigerant water in the inner pipe 2, the Freon has strong heat absorption capacity, can quickly absorb the heat in the fins 11 and the hot air, and plays a role of quickly cooling the hot air,

however, the thermal capacity of freon is limited, so that it will reach a state similar to saturation soon after absorbing a certain amount of heat (or the specific heat capacity of freon is not high, and the self temperature rise amplitude is large after absorbing a certain amount of heat), so that it can hardly absorb heat any more in the following, see with fig. 2: similarly, suppose that a double-layer pipe is not used in fig. 2, but a traditional single-layer pipe, and a single freon refrigerant circulates in the pipe, and in the state that hot air is continuously blown in the direction and the area in fig. 2, according to the freon transmission direction in fig. 2, after a unit of freon passes through the section a in the pipe, the freon absorbs heat and is saturated, and in the subsequent process of passing through the section B, although hot air is blown in the section, the freon can basically not absorb heat and cool the hot air,

therefore, the double-layer pipe structure needs to be emphasized in the scheme: when the freon is transmitted, the heat can be quickly and fully absorbed from the hot air through the fins 11 to raise the temperature of the freon, the freon and the water with higher heat capacity in the inner pipe 2 perform certain heat exchange, and then part of the heat is transferred into the refrigerant water, so that the temperature of the freon is not raised so fast, namely the heat capacity of the freon is not saturated so fast, namely the heat capacity of the freon is improved, and the heat capacity of the freon is equivalently changed, and as seen in the graph 2, at the moment, one unit of the freon in the pipeline is bound to travel a path which is longer than the A section to reach the heat absorption saturation, thereby increasing the absorption of the heat in the hot air,

water is high boiling point refrigerant, and the specific heat capacity is higher, and the thermal capacity is big, absorbs equal heat after, the temperature rise range is not big (far less than freon), therefore the refrigerant water in the circulation water route all keeps the lower temperature generally, when the heat accumulation in refrigerant water reaches certain degree, can start first condenser 7 and carry out the back cooling and intervene (the flow direction of refrigerant water can be with freon reverse, also can be with freon syntropy).

See again the utility model provides a fin 11 structure, when cup jointing each fin 11 and assembling to form fin group on the pipeline, the multi-disc fin that stacks together can receive the assembly extrusion force to the centre that comes from top and below. In the attached drawing 6, the fin structure is a relatively conventional fin structure, and under the action of the extrusion force, because the cylinder wall of the first support cylinder 12 is very thin, the upper cylinder wall of the lower first support cylinder 12 is easy to move upwards and is embedded into a gap between the inner hole wall of the through hole 111 of the upper fin 11 and the outer cylindrical surface of the outer tube 1, so that the distance between the upper and lower adjacent fins 11 is reduced, and the heat exchange effect is influenced;

in fig. 7, the inclined flange 121 protrudes outwards from the top peripheral edge of the first support cylinder 12, the existence of the flange 121 does play a role of blocking, and it is avoided that the upper cylinder wall of the first support cylinder 12 is embedded into the gap between the inner hole wall of the through hole 111 of the upper fin 11 and the outer cylindrical surface of the outer tube 1 when the first support cylinder 12 is acted by an upward jacking force, but it is easy to see that, in this case, a circle of the flange 121 is stressed downwards, and the downward stress easily causes the metal flange 121 to be fractured, that is, a crack with a length direction substantially consistent with the radius direction of the circle surrounded by the flange 121 appears on the surface of the flange 121, the crack is generally fractured from the top edge of the flange 121, and under the stress, the crack extends downwards and is fractured, so that the flange 121 and the cylinder wall of the first support cylinder 12 both appear, and the strength and the assembly stability of the fin 11 are greatly affected,

in the design of this solution, as shown in fig. 5, the turned-over edge 121 is integrally and upwardly embedded into a groove surrounded by the lower surface of the horizontal ring-shaped piece 131 on the upper fin 11 and the inner cylindrical surface of the second supporting cylinder 132, which not only prevents the first supporting cylinder 12 below from being embedded into a gap between the inner hole wall of the through hole 111 of the upper fin 11 and the outer cylindrical surface of the outer tube 1 through the cylinder wall, but also prevents the inner cylindrical surface of the second supporting cylinder 132 on the upper fin 11 from horizontally and inwardly abutting against the top peripheral edge of the turned-over edge 121 on the lower fin 11 due to the matching inside and outside sleeving relation between the outside diameter of the top opening of the turned-over edge 121 and the inside diameter of the groove, thereby playing a limiting role and preventing the turned-over edge 121 from cracking due to outward expansion after being subjected to downward pressure.

Claims (5)

1. The utility model provides a high-efficient cooling body of two refrigerants which characterized in that: the mechanism comprises a fin group and a pipeline which is arranged on the fin group in a penetrating way and is used for the flowing of a cooling medium,

the pipeline is a double-layer pipe and comprises an outer pipe (1) and an inner pipe (2) penetrating through the pipe cavity of the outer pipe (1), the inner pipe (2) is used for transmitting a high-boiling-point refrigerant (3), and an area between the inner pipe (2) and the outer pipe (1) is used for transmitting a low-boiling-point refrigerant (4).

2. The dual refrigerant high efficiency cooling mechanism of claim 1, wherein: the cooling mechanism also comprises a high boiling point refrigerant storage tank (5), a low boiling point refrigerant storage tank (6), a first condenser (7), a second condenser (8), a first pump body (91) and a second pump body (101),

the high boiling point refrigerant storage tank (5) sequentially conveys the high boiling point refrigerant (3) to the first condenser (7) and the inner pipe (2) through a first circulating pipeline (9) and then conveys the high boiling point refrigerant back to the high boiling point refrigerant storage tank (5), the first pump body (91) is arranged on the first circulating pipeline (9),

the low-boiling-point refrigerant storage tank (6) sequentially conveys the low-boiling-point refrigerant (4) to the second condenser (8), the inner pipe (2) and the area between the outer pipes (1) through a second circulating pipeline (10), and then conveys the low-boiling-point refrigerant storage tank (6), and the second pump body (101) is installed on the second circulating pipeline (10).

3. The dual refrigerant high efficiency cooling mechanism of claim 1, wherein: the fin group comprises a plurality of fins (11) which are arranged, a plurality of through holes (111) which penetrate through the upper surface and the lower surface of each fin (11) are distributed on each fin (11), the pipeline sequentially penetrates through the fins (11) through the through holes (111), a first supporting cylinder (12) which is coaxially arranged with the through holes (111) and is provided with openings at two ends along the axial direction of the pipeline is connected to the upper surface of each fin (11) and is coaxially arranged with the through holes (111), the pipeline coaxially penetrates through the first supporting cylinder (12), and the periphery of the top of the first supporting cylinder (12) is outwards expanded to form a flanging (121),

the bottom of the first supporting cylinder (12) is connected with the through hole (111) through an annular step (13), the annular step (13) is coaxially arranged with the first supporting cylinder (12) and/or the through hole (111), the annular step (13) comprises a horizontal annular sheet (131), the periphery of the horizontal annular sheet (131) vertically extends downwards to form a second supporting cylinder (132) with two open ends along the axial direction of the second supporting cylinder, the bottom periphery of the second supporting cylinder (132) is circumferentially connected to the hole edge of the through hole (111), and the inner edge of the horizontal annular sheet (131) is circumferentially connected to the bottom periphery of the first supporting cylinder (12),

between the fins (11) which are arranged adjacently up and down, the turned-over edges (121) on the lower fins (11) are wholly vertically upwards and just embedded into a groove which is formed by the lower surfaces of the horizontal annular sheets (131) on the upper fins (11) and the inner cylindrical surface of the second supporting cylinder (132) in a surrounding mode.

4. The dual refrigerant high efficiency cooling mechanism of claim 3, wherein: the turned-over edge (121) is arranged obliquely outwards from bottom to top.

5. The dual refrigerant high efficiency cooling mechanism of claim 3, wherein: the pipe body of the outer pipe (1) of the pipeline is tightly attached to the inner cylindrical surface of the first supporting cylinder (12) along the radial direction, the outer circumference and the inner circumferential surface.

Images