CN111664736A - Heat exchange tube for air conditioner, heat exchanger and air conditioner - Google Patents

Abstract

The invention relates to a heat exchange tube for an air conditioner, a heat exchanger and an air conditioner. Wherein, idle call heat exchange tube includes: a pipe body; and teeth provided on an inner wall of the tube body, the teeth extending toward the central axis of the tube body in a tooth height direction of the teeth, the teeth extending along the central axis direction of the tube body in a length direction of the teeth, the teeth being configured in a corrugated shape. The teeth are arranged on the inner wall of the tube body, so that the internal heat exchange area of the heat exchange tube is increased, and the heat exchange effect is enhanced; moreover, the surfaces of the two sides of the corrugated teeth are also corrugated, fluid continuously collides with the corrugations of the teeth in the flowing process of the two sides of the teeth, the boundary layer of the fluid is continuously crushed and thinned, the thermal resistance is also continuously reduced, and the heat exchange effect is improved.

Description

Heat exchange tube for air conditioner, heat exchanger and air conditioner

Technical Field

The invention relates to the technical field of heat exchange, in particular to a heat exchange tube for an air conditioner, a heat exchanger and an air conditioner.

Background

As a key heat transfer element of the heat exchanger, the improvement of the energy efficiency of the heat exchange tube plays an important role in improving the energy efficiency of the heat exchanger and a unit. In the related central air-conditioning water cooler unit, the outside of a heat exchange tube (comprising an evaporation tube and a condensation tube) comprises a fin-shaped structure suitable for phase change, and the inside of the heat exchange tube comprises a tooth-shaped structure suitable for non-phase change heat exchange. In the related art, the heat exchange effect in the heat exchange tube is improved by means of increasing the number of internal teeth, the spiral angle, the internal teeth and the like of the continuous spiral internal teeth of the heat exchange tube, but the significance of improving the heat exchange effect is not high.

Disclosure of Invention

Some embodiments of the invention provide a heat exchange tube for an air conditioner, a heat exchanger and an air conditioner, which are used for solving the problem that the heat exchange effect in the tube of the heat exchange tube is not obviously improved.

Some embodiments of the present invention provide a heat exchange pipe for an air conditioner, including:

a pipe body; and

a tooth provided on an inner wall of the tube body, the tooth extending toward the central axis of the tube body in a tooth height direction of the tooth, the tooth extending along the central axis direction of the tube body in a length direction of the tooth, the tooth being configured in a corrugated shape.

In some embodiments, the tooth comprises a plurality of tooth segments connected in series to form a corrugation.

In some embodiments, the teeth include a plurality of tooth segments spaced apart to form a corrugation.

In some embodiments, the shortest distance between two adjacent tooth segments of the plurality of tooth segments ranges from 0.1mm to 0.4 mm.

In some embodiments, a recess is formed between adjacent two of the plurality of tooth segments, the recess having a cross-sectional shape that includes a trapezoid or a rectangle.

In some embodiments, the two side faces of at least one of the plurality of tooth segments are configured as arcuate faces or planar faces.

In some embodiments, the corrugations comprise a plurality of S-shaped or a plurality of V-shaped connected corrugations, or the corrugations comprise a plurality of S-shaped and a plurality of V-shaped connected corrugations.

In some embodiments, the included angle of the V-shape ranges from 30 to 150.

In some embodiments, the teeth are configured to be uniformly or non-uniformly corrugated, or partially uniformly corrugated and partially non-uniformly corrugated.

In some embodiments, the teeth extend along the central axis of the tube in the length direction of the teeth, and are helically arranged around the central axis of the tube.

Some embodiments of the invention provide a heat exchanger for an air conditioner, which comprises the heat exchange tube for the air conditioner.

Some embodiments of the present invention provide an air conditioner including the air conditioner heat exchanger described above.

Based on the technical scheme, the invention at least has the following beneficial effects:

in some embodiments, the teeth are arranged on the inner wall of the tube body, so that the internal heat exchange area of the heat exchange tube is increased, and the heat exchange effect is enhanced; moreover, the surfaces of the two sides of the corrugated teeth are also corrugated, fluid continuously collides with the corrugations of the teeth in the flowing process of the two sides of the teeth, the boundary layer of the fluid is continuously crushed and thinned, the thermal resistance is also continuously reduced, and the heat exchange effect is improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:

fig. 1 is a schematic view of the inside of a heat exchange pipe for an air conditioner provided according to a first embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view A-A of FIG. 1;

fig. 3 is a schematic view of the inside of a heat exchange pipe for an air conditioner provided according to a second embodiment of the present invention;

FIG. 4 is a schematic cross-sectional view B-B of FIG. 3;

fig. 5 is a schematic view of the inside of a heat exchange pipe for an air conditioner provided according to a third embodiment of the present invention;

fig. 6 is an internal schematic view of a heat exchange tube for an air conditioner provided according to a fourth embodiment of the present invention;

fig. 7 is a schematic view of the inside of a heat exchange tube for an air conditioner according to a fifth embodiment of the present invention;

fig. 8 is a schematic view of the inside of a heat exchange pipe for an air conditioner according to a sixth embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be taken as limiting the scope of the present invention.

The heat exchange tube for the air conditioner comprises an evaporation tube and a condensation tube. The heat exchange tube is externally provided with a fin-shaped structure suitable for phase change heat exchange, and internally provided with a tooth-shaped structure suitable for non-phase change heat exchange. Wherein, the outer fin structure of the evaporating tube gradually develops from a semi-closed cavity of a mechanical extrusion processing surface to a surface sintering porous structure. The outer fin structure of the condenser pipe gradually develops from two-dimensional thin and high fins on the extrusion processing surface to three-dimensional thin and high independent fins.

The heat exchange performance of the heat exchange tube is generally analyzed from the perspective of thermal resistance. If a large number of heat exchange tubes used on a central air-conditioning heat exchanger are taken as an example, the thermal resistance outside the tubes, the thermal resistance on the tube walls and the thermal resistance inside the tubes respectively account for 50% -55%, 3% -5% and 45% -50% of the total thermal resistance. Because the thermal resistance of the tube wall is positively correlated with the thickness of the tube wall, the thickness of the tube wall is related to the safety of the heat exchange tube (the wall thickness is small, the safety of the heat exchange tube is insufficient), and the proportion of the thermal resistance of the tube wall in the total thermal resistance is small, the thermal resistance outside and inside the tube is reduced from the heat exchange outside and inside the reinforced tube, so that the overall thermal performance of the heat exchange tube is improved.

For the reinforced evaporation tube with the external fins adopting the surface sintering porous structure and the reinforced condensation tube with the surface sprayed with refrigerant-repellent coating to achieve bead-shaped condensation, the heat transfer coefficients outside the tube are obviously improved, so that the proportion of the heat resistance outside the tube in the total heat resistance of the heat exchange tube is greatly reduced, therefore, the proportion of the heat resistance inside the tube needs to be reduced at present, and the non-phase-change heat exchange inside the tube needs to be enhanced.

Based on this, some embodiments of the present disclosure provide an idle call heat exchange tube, idle call heat exchanger and air conditioner for improve the intraductal heat transfer effect of heat exchange tube.

As shown in fig. 1 to 8, schematic diagrams of heat exchange tubes for air conditioners according to some embodiments are provided. In some embodiments, the heat exchange tube for air conditioners comprises a tube body 1 and teeth 2. Fig. 1, 3, 5 to 8 are developed schematic views of a tube body 1 of a heat exchange tube, wherein the X direction in the drawings is the axial direction of the tube body 1, and the Y direction in the drawings is the circumferential direction of the tube body 1.

A heat exchange channel is formed in the tube body 1. Alternatively, the cross section of the pipe body 1 includes a circle, a rectangle, a polygon, or the like.

The teeth 2 are provided on the inner wall of the tube body 1, the teeth 2 extend toward the central axis of the tube body 1 in the tooth height direction of the teeth 2, the teeth 2 extend along the central axis direction of the tube body 1 in the length direction of the teeth 2, and the teeth 2 are constructed in a corrugated shape.

Along the tooth height direction of tooth 2, tooth 2 includes tooth root and tooth top, and the tooth root of tooth 2 and the interior wall connection of body 1, the tooth top of tooth 2 sets up with the tooth root relatively, and the tooth top of tooth 2 is close to the axis of body 1 for first end.

Referring to fig. 2, tooth 2 has a tooth height H1.

The width dimension of the tooth root of the tooth 2 is the same as or different from the width dimension of the tooth tip of the tooth 2.

For example: the width dimension of the tooth root of the tooth 2 is different from the width dimension of the tooth tip of the tooth 2. Alternatively, the end face shape of the tooth 2 includes a trapezoid, a triangle, an M-shape, and the like. Referring to fig. 2, the end surface of the tooth 2 is trapezoidal in shape, and the first end of the tooth 2 has a width dimension L1.

For example: the width dimension of the tooth root of the tooth 2 is the same as the width dimension of the tooth tip of the tooth 2. Alternatively, the end face shape of the tooth 2 includes a rectangle.

In some embodiments, the teeth 2 are arranged on the inner wall of the tube body 1, so that the internal heat exchange area of the heat exchange tube is increased, and the heat exchange effect is enhanced, and the teeth 2 are constructed in a corrugated shape, so that the surface area of the teeth 2 and the internal heat exchange area of the heat exchange tube are obviously increased in the extension direction along the central axis of the tube body 1, and the tube internal heat exchange effect of the heat exchange tube is improved; moreover, the surfaces of the two sides of the corrugated teeth 2 are also corrugated, fluid continuously collides with the corrugations of the teeth 2 in the flowing process of the two sides of the teeth 2, the boundary layer of the fluid is continuously crushed and thinned, and the thermal resistance is also continuously reduced, so that the purpose of heat exchange enhancement is achieved.

In some embodiments, referring to fig. 1, 5 and 7, the tooth 2 comprises a plurality of tooth segments 21, the plurality of tooth segments 21 being connected in series to form an accordion.

Every tooth section 21 among a plurality of tooth sections 21 includes first end and second end along the tooth height direction, and the first end of tooth section 21 and the inner wall connection of body 1, the second end and the first end of tooth section 21 set up relatively, and the second end of tooth section 21 is close to the axis of body 1 for first end.

In some embodiments, the first end to the second end of the tooth segments 21 have a uniform width dimension, the tooth segments 21 have a uniform structure and dimension, and the tooth segments 21 are connected seamlessly with each other, as shown in fig. 1, 5 and 7. The width direction of the tooth segment 21 here coincides with the longitudinal direction of the tooth 21.

In other embodiments, the width-wise dimension of the tooth segments 21 is not uniform from the first end to the second end. The width direction of the tooth segment 21 here coincides with the longitudinal direction of the tooth 21.

For example: the width-wise dimension of the first end of the tooth segment 21 is greater than the width-wise dimension of the second end of the tooth segment 21. The junction of two adjacent tooth segments 21 forms a recess. Optionally, the cross-section of the recess comprises a triangle, trapezoid or rectangle.

For example: the width-wise dimension of the first end of the tooth segment 21 is smaller than the width-wise dimension of the second end of the tooth segment 21. The junction of two adjacent tooth segments 21 forms a recess. Optionally, the cross-section of the recess comprises a triangle, trapezoid or rectangle.

In some embodiments, referring to fig. 3, 6 and 8, the tooth 2 includes a plurality of tooth segments 21, and the plurality of tooth segments 21 are spaced apart to form a corrugation.

The plurality of tooth sections 21 are arranged at intervals to form a corrugated shape, a space is reserved between every two adjacent tooth sections 21, fluid disturbance in the pipe is enhanced through discontinuity between every two adjacent tooth sections 21, flow resistance is reduced, and a heat exchange effect is improved.

In some embodiments, referring to fig. 4, a recess 22 is formed between adjacent two of the plurality of tooth segments 21.

When the fluid flows to the concave part 22, the fluid can not only pass through under the premise of unchanging the flow direction, so that the pressure drop in the pipe is reduced, but also the concave part 22 has the functions of increasing the local flow speed and strengthening turbulence disturbance, and the fluid boundary layers in the area and the adjacent area can be thinned, so that the heat exchange between the fluid in the pipe and the wall surface is enhanced, and the heat exchange effect is strengthened.

Alternatively, the sectional shape of the recess 22 includes a trapezoid, a rectangle, or the like.

In some embodiments, the shortest distance between two adjacent tooth segments 21 of the plurality of tooth segments 21 ranges from 0.1mm to 0.4 mm.

For example: referring to fig. 4, the shortest distance between two adjacent tooth segments 21 is L2, and L2 ranges from 0.1mm to 0.4 mm.

In some embodiments, both sides of at least one tooth segment 21 of the plurality of tooth segments 21 are configured as arc-shaped faces or flat faces.

For example: referring to fig. 3, both side faces of the tooth segment 21 are configured as arc-shaped faces. The teeth 2 are formed by arranging a plurality of tooth segments 21 with arc-shaped surfaces at intervals to form a plurality of S shapes and connected by the plurality of S shapes to form a corrugation shape.

For example: referring to fig. 6 and 8, both side faces of the tooth segment 21 are configured as flat faces. The teeth 2 having a corrugated shape are formed by a plurality of V-shapes formed by arranging a plurality of teeth segments 21 having a flat surface at intervals and connecting the plurality of V-shapes.

Two adjacent tooth segments 21 are arranged at intervals, namely: the tooth sections 21 and the tooth sections 21 are arranged discontinuously to form a corrugated combination, so that the heat exchange area inside the tube body 1 is greatly increased, the heat exchange effect is improved, the pressure drop in the tube is reduced, and the thermal performance in the heat exchange tube is obviously improved. For example: the heat transfer performance in the tube can be improved by 20-50%.

In some embodiments, the accordion comprises an accordion formed from a plurality of S-shapes or a plurality of V-shaped connections, or the accordion comprises an accordion formed from a plurality of S-shapes and a plurality of V-shaped connections.

For example: referring to fig. 1 and 3, the accordion shape includes a plurality of accordion shapes formed by S-shaped connection.

For example: referring to fig. 5 to 8, the wrinkle shape includes a plurality of V-shaped connected wrinkle shapes.

In some embodiments, the included angle of the V-shape ranges from 30 to 150. Optionally, the V-shape of the corrugation formed by the plurality of V-shaped connections of different teeth 2 has a different angular extent.

For example: referring to fig. 5 and 6, the range of V-shaped cleat angles in the corrugation of the tooth 2 is the same, except that the corrugation of the tooth 2 in fig. 5 is formed by connecting a plurality of tooth segments 21 in sequence, and the corrugation of the tooth 2 in fig. 6 is formed by arranging a plurality of tooth segments 21 at intervals.

For example: referring to fig. 7 and 8, the range of V-shaped cleat angles in the corrugation of the tooth 2 is the same, except that the corrugation of the tooth 2 in fig. 7 is formed by connecting a plurality of tooth segments 21 in sequence, and the corrugation of the tooth 2 in fig. 8 is formed by arranging a plurality of tooth segments 21 at intervals.

Wherein the included angle of the V-shape shown in fig. 7 and 8 is greater than the included angle of the V-shape shown in fig. 5 and 6.

In some embodiments, the teeth 2 are configured to be uniformly corrugated or non-uniformly corrugated.

In other embodiments, the teeth 2 are configured to be partially uniformly corrugated, and partially non-uniformly corrugated. For example: along the length direction of the pipe body 1, the number of wave crests of the corrugation on the same length section of the tooth 2 is increased or reduced.

In some embodiments, the teeth 2 extend along the central axis of the tube 1 in the length direction of the teeth 2, and are spirally arranged around the central axis of the tube 1.

In some embodiments, the teeth 2 are spirally distributed around the central axis of the tube 1 in the length direction of the tube 1 and extend in the central axis direction of the tube 1, and the teeth 2 are configured to be corrugated. The corrugation form of the teeth 2 has various forms so as to greatly strengthen the heat exchange effect in the pipe of the heat exchange pipe, reduce the heat resistance ratio in the pipe to a reasonable interval and reduce the pressure drop of fluid in the pipe.

Optionally, the teeth 2 are helically arranged around the central axis of the tubular body 1 with a helix angle in the range of 0 to 90 degrees.

In some embodiments, a plurality of teeth 2 are disposed inside the tube body 1, the plurality of teeth 2 are spaced apart from each other, and a flow passage is formed between two adjacent teeth 2. For example: the number of the teeth 2 arranged in the pipe body 1 is 30-70. Alternatively, the number of teeth 2 provided inside the tubular body 1 is 56.

In some embodiments, the exterior of the tube body 1 is provided with a fin structure. The inside of body 1 is equipped with tooth 2.

In some embodiments, the heat exchange tube for air conditioning comprises a condenser tube or an evaporator tube.

Several examples of heat exchange tubes are listed below.

As shown in fig. 1 and 2, a schematic view of a first embodiment of a heat exchange tube is shown.

In the first embodiment, as shown in fig. 1, the heat exchange tube includes a tube body 1, a plurality of teeth 2 are provided in the tube body 1, each of the plurality of teeth 2 is provided on an inner wall of the tube body 1, the teeth 2 extend toward a central axis of the tube body 1 in a tooth height direction of the teeth 2, and the teeth 2 extend along the central axis of the tube body 1 in a length direction of the teeth 2.

The teeth 2 are configured to be corrugated. The fold shape is formed by connecting a plurality of S shapes. A flow channel is formed between every two adjacent teeth 2, the flow channel extends along the central axis direction of the pipe body 1 and is spirally distributed around the central axis of the pipe body 1, and the side surface of the flow channel is in a corrugated shape formed by connecting a plurality of S shapes.

As shown in fig. 2, the outer diameter of the tube body 1 of the heat exchange tube is 19.05mm, the inner diameter of the tube body 1 is 16.2mm, and the section of the teeth 2 arranged on the inner wall of the tube body 1 is trapezoidal. The tooth height H1 is not more than 0.5 mm. The width L1 of the tooth root ranges from 0.1mm to 0.6mm, preferably 0.45 mm. The angle θ 1 between the two side surfaces of the tooth 2 is in the range of 5 ° to 75 °, preferably 30 °.

As shown in fig. 3 and 4, a schematic view of a second embodiment of the heat exchange tube is shown.

In the second embodiment, as shown in fig. 3, the second embodiment is different from the first embodiment mainly in that: the tooth 2 comprises a plurality of tooth sections 21, the tooth sections 21 are arranged at intervals and arranged along an S shape, and the S shapes form an integral fold shape of the tooth 2.

As shown in fig. 4, a concave portion 22 is formed between two adjacent tooth segments 21, the cross section of the concave portion 22 is trapezoidal, and the size of the concave portion 22 close to the inner wall of the pipe body 1 is smaller than the size of the concave portion 22 far from the inner wall of the pipe body 1. The width L2 of the connection part of the concave part 22 and the inner wall of the tube body 1 is 0.1mm to 0.4mm, preferably 0.2mm, and the angle range of the included angle a2 of the two side surfaces of the concave part 22 is 5 degrees to 90 degrees, preferably 15 degrees.

As shown in fig. 5, a schematic view of a third embodiment of a heat exchange tube.

The third embodiment differs from the first embodiment mainly in that: the corrugation of the teeth 2 is formed by a plurality of V-shaped connections.

As shown in fig. 6, a schematic view of a fourth embodiment of a heat exchange tube.

The fourth embodiment differs from the third embodiment mainly in that: the tooth 2 comprises a plurality of tooth sections 21, the tooth sections 21 are arranged at intervals, every two tooth sections 21 are arranged at intervals to form a V shape, and the V shapes are connected to form the integral corrugation of the tooth.

As shown in fig. 7, a schematic view of a fifth embodiment of the heat exchange tube.

The fifth embodiment differs from the third embodiment mainly in that: the angle of the V-shape in the fifth embodiment is larger than the angle of the V-shape in the third embodiment.

As shown in fig. 6, a schematic view of a sixth embodiment of the heat exchange tube.

The sixth embodiment differs from the fifth embodiment mainly in that: tooth 2 includes a plurality of tooth sections 21, and a plurality of tooth sections 21 interval sets up, and arranges along four tooth sections 21 intervals and form a V-arrangement, and a plurality of V-arrangements connect the holistic fold form that forms tooth 2.

Some embodiments provide a heat exchanger for an air conditioner, which includes the heat exchange pipe for an air conditioner. The heat exchanger for an air conditioner includes an evaporator or a condenser.

Some embodiments provide an air conditioner including the air conditioner heat exchanger described above.

Optionally, the air conditioner comprises a central air conditioning water chiller.

In the description of the present invention, it should be understood that the terms "first", "second", "third", etc. are used to define the components, and are used only for the convenience of distinguishing the components, and if not otherwise stated, the terms have no special meaning, and thus, should not be construed as limiting the scope of the present invention.

Furthermore, the technical features of one embodiment may be combined with one or more other embodiments advantageously without explicit negatives.

Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present invention and not to limit the same; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.

Claims (12)

1. A heat exchange tube for an air conditioner is characterized by comprising:

a pipe body (1); and

the tooth (2) is arranged on the inner wall of the pipe body (1), in the tooth height direction of the tooth (2), the tooth (2) extends towards the central axis of the pipe body (1), in the length direction of the tooth (2), the tooth (2) extends along the central axis of the pipe body (1), and the tooth (2) is constructed into a corrugated shape.

2. The heat exchange tube for air conditioners as claimed in claim 1, wherein the teeth (2) comprise a plurality of tooth segments (21), and the plurality of tooth segments (21) are connected in sequence to form a corrugated shape.

3. The heat exchange tube for air conditioners as claimed in claim 1, wherein the teeth (2) comprise a plurality of tooth sections (21), and the plurality of tooth sections (21) are arranged at intervals to form a corrugated shape.

4. The heat exchange pipe for an air conditioner according to claim 3, wherein the shortest distance between adjacent two of the plurality of tooth segments (21) ranges from 0.1mm to 0.4 mm.

5. The heat exchange pipe for air conditioners as claimed in claim 3, wherein a recess (22) is formed between adjacent two of the plurality of tooth segments (21), and the cross-sectional shape of the recess (22) includes a trapezoid or a rectangle.

6. The heat exchange pipe for an air conditioner as recited in claim 2 or 3, wherein both side faces of at least one tooth section (21) of the plurality of tooth sections (21) are configured as arc-shaped faces or flat faces.

7. The heat exchange tube for air conditioners as claimed in claim 1, wherein the corrugated shape comprises a corrugated shape formed by connecting a plurality of S-shapes or a plurality of V-shapes, or a corrugated shape formed by connecting a plurality of S-shapes and a plurality of V-shapes.

8. A heat exchange tube for an air conditioner as recited in claim 7, wherein the angle of said V-shape is in the range of 30 ° to 150 °.

9. The heat exchange tube for air conditioners according to claim 1, wherein the teeth (2) are configured in a uniform corrugation or a non-uniform corrugation, or in a partially uniform corrugation, in a partially non-uniform corrugation.

10. The heat exchange tube for air conditioners as claimed in claim 1, wherein the teeth (2) extend in the direction of the central axis of the tube body (1) in the lengthwise direction of the teeth (2) and are spirally arranged around the central axis of the tube body (1).

11. A heat exchanger for an air conditioner, characterized by comprising the heat exchange tube for an air conditioner as recited in any one of claims 1 to 10.

12. An air conditioner characterized by comprising the heat exchanger for air conditioners as claimed in claim 11.

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