Heat exchange tube, heat exchanger and air conditioner
By optimizing the helical angle, number of teeth and top angle of the internal thread in the heat exchange pipe, the problem that existing heat exchange pipes cannot take into account both heat exchange performance and cost, and achieving efficient heat exchange performance and low-cost air conditioner design.
Patent Information
- Application Number
- CN202420016622.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-04
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2034-01-04
AI Technical Summary
Existing heat exchange pipes cannot take into account their heat exchange performance and processing costs, resulting in poor heat exchange performance or high processing costs of the air conditioner.
A heat exchange tube was designed, with the helical angle range of the internal thread being [18°, 25°], the number of teeth being [30, 50], and the top angle range of the tooth being [5°, 35°] to improve the heat exchange coefficient It also reduces material consumption, thereby improving the heat exchange performance of heat exchangers and air conditioners and reducing production costs.
High heat exchange performance and low material consumption are achieved, reducing the processing costs of heat exchange pipes, heat exchangers and air conditioners, while improving the cooling and heating capabilities of the air conditioners and reducing power consumption.
Smart Images
Figure CN222298601U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of air conditioning, and in particular to a heat exchange tube, a heat exchanger and an air conditioner. Background Art
[0002] Air conditioners are widely used for temperature regulation in indoor environments. The condenser and evaporator of the air conditioner are direct heat exchangers, and their heat exchange performance directly determines the performance of the air conditioner. Specifically, the refrigerant in the heat exchanger flows through the heat exchange tubes to exchange heat with the environment. The current heat exchange tubes generally use copper internal threaded tubes. The heat exchange tubes cannot take into account both their heat exchange performance and processing costs, which correspondingly leads to poor heat exchange performance or high processing costs of the heat exchanger and air conditioner. Utility Model Content
[0003] The utility model aims to provide a heat exchange tube, a heat exchanger and an air conditioner to solve the technical problem that the existing heat exchange tube cannot take into account both its heat exchange performance and processing cost.
[0004] To solve the above problems, the utility model provides a heat exchange tube, comprising a base tube and a plurality of internal threads arranged on the inner wall of the base tube, wherein the helix angle of the internal threads is in the range of [18°, 25°], the number of teeth is in the range of [30, 50], and the tooth top angle is in the range of [5°, 35°].
[0005] The heat exchange tube provided by the utility model comprehensively considers the influence of the internal thread helix angle, the number of teeth and the tooth top angle on the heat transfer coefficient and material consumption of the heat exchange tube. When the helix angle α of the internal thread in the heat exchange tube is set to [18°, 25°], the number of teeth is set to [30, 50], and the tooth top angle β is set to [5°, 35°], the heat exchange tube can have a higher heat transfer coefficient, which can correspondingly improve the heat exchange performance of the heat exchanger and the air conditioner. At the same time, the material consumption of the heat exchange tube is low, which can not only reduce the consumption of metal resources, but also effectively reduce the processing cost of the heat exchange tube, the heat exchanger and the air conditioner.
[0006] Optionally, the number of teeth of the internal thread is in the range of [35, 45].
[0007] Optionally, the number of teeth of the internal thread is in the range of [36, 40].
[0008] Optionally, the outer diameter of the base tube is [4.85 mm, 4.95 mm], and the wall thickness is [0.18 mm, 0.22 mm].
[0009] Optionally, the tooth height range of the internal thread is [0.13mm, 0.15mm].
[0010] Optionally, the tooth height range of the internal thread is [0.13mm, 0.14mm].
[0011] Optionally, the tooth top angle range of the internal thread is [15°, 25°].
[0012] Optionally, the tooth top angle range of the internal thread is [15°, 20°].
[0013] The utility model also provides a heat exchanger, comprising a plurality of heat exchange fins and a plurality of the above-mentioned heat exchange tubes, wherein the plurality of heat exchange tubes are arranged in parallel, each of the heat exchange fins is penetrated by the plurality of the heat exchange tubes, and the plurality of heat exchange fins are arranged at intervals along the length direction of the heat exchange tubes.
[0014] The utility model also provides an air conditioner, including a compressor, an evaporator, a throttling assembly and a condenser. The compressor, the evaporator, the throttling assembly and the condenser are connected through a refrigerant pipe to form a refrigerant circulation, and at least one of the evaporator and the condenser adopts the above-mentioned heat exchanger.
[0015] The heat exchanger and the air conditioner provided by the utility model both adopt the heat exchange tube, which has better heat exchange performance and lower material consumption and processing cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.
[0017] Figure 1 A radial cross-sectional view of the heat exchange tube provided by the utility model;
[0018] Figure 2 This is an axial partial cross-sectional view of the heat exchange tube provided by the utility model.
[0019] Description of reference numerals:
[0020] 100-base pipe; 200-internal thread. DETAILED DESCRIPTION
[0021] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific embodiments of the utility model are described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.
[0022] This embodiment provides a heat exchange tube, such as Figure 1 and Figure 2As shown, it includes a base pipe 100 and a plurality of internal threads 200 arranged on the inner wall of the base pipe 100, wherein the helix angle α of the internal thread 200 is in the range of [18°, 25°], the number of teeth is in the range of [30, 50], and the tooth top angle β is in the range of [5°, 35°].
[0023] The heat exchange tube provided in this embodiment includes a base tube 100 with a refrigerant channel formed inside and an internal thread 200 arranged on the inner wall of the base tube 100 to improve the heat exchange effect. Specifically, the internal thread 200 is a convex tooth-shaped spiral extending on the inner wall of the base tube 100, and multiple internal threads 200 are arranged in parallel and spaced apart. Among them, within a certain range, the heat transfer coefficient of the heat exchange tube gradually increases with the increase of the internal thread 200 helix angle, the increase of the number of teeth or the decrease of the tooth top angle. At the same time, the material consumption of the heat exchange tube increases with the increase of the internal thread 200 helix angle, the increase of the number of teeth and the increase of the tooth top angle; however, when the number of internal thread 200 teeth is too much, it will not only lead to an increase in the material consumption of the heat exchange tube, but also cause the tooth spacing to be too small, thereby weakening the stirring intensity of the refrigerant in the tube, increasing the thickness of the liquid film between the teeth, and increasing the thermal resistance, resulting in a decrease in the heat transfer coefficient of the heat exchange tube; at the same time, although a too small tooth top angle can reduce the material consumption of the heat exchange tube to a certain extent, it will lead to a small anti-expansion strength of the heat exchange tube, and the degree to which the tooth height is compressed after expansion and the number of tooth shape deformations will increase, thereby resulting in a decrease in the heat transfer coefficient of the heat exchange tube.
[0024] Taking into account the influence of the internal thread 200 helix angle, number of teeth and tooth top angle on the heat transfer coefficient and material consumption of the heat exchange tube, when the helix angle α of the internal thread 200 in the heat exchange tube is set to [18°, 25°], the number of teeth is set to [30, 50], and the tooth top angle β is set to [5°, 35°], the heat exchange tube can have a higher heat transfer coefficient, which can correspondingly improve the heat transfer performance of the heat exchanger and the air conditioner. At the same time, the material consumption of the heat exchange tube is low, which can not only reduce the consumption of metal resources, but also effectively reduce the processing cost of the heat exchange tube, heat exchanger and air conditioner.
[0025] Table 1
[0026]
[0027] Specifically, Table 1 is a parameter comparison table of the heat exchange tubes of Examples 1 and 2 and Comparative Examples 1 and 2. The heat exchange tubes of Example 1 and Comparative Example 1 are both made of copper material, the outer diameter and wall thickness of the base tube 100 of the two are respectively equal, and the tooth height of the internal thread 200 of the two is equal. In Example 1, by selecting a suitable tooth top angle, number of teeth and helix angle, not only the heat transfer coefficient of the heat exchange tube is increased by nearly 12.2% compared with Comparative Example 1, but also the meter weight of the heat exchange tube can be reduced by nearly 4.5% compared with Comparative Example 1, which can correspondingly improve the heat transfer coefficient of the heat exchange tube while reducing material consumption and processing costs.
[0028] In this embodiment, the number of teeth of the internal thread 200 is preferably in the range of [35, 45], and further preferably in the range of [36, 40]; the outer diameter R of the base pipe 100 is [4.85 mm, 4.95 mm], and the wall thickness s is [0.18 mm, 0.22 mm]; the tooth height h of the internal thread 200 is in the range of [0.13 mm, 0.15 mm], and preferably in the range of [0.13 mm, 0.14 mm]. Among them, within a certain range, the smaller the wall thickness s of the base tube 100 is, the higher the heat transfer coefficient of the heat exchange tube is and the less the material consumption is. At the same time, when the wall thickness is too small, the strength of the base tube 100 and the stability of the internal thread 200 will be weakened; the larger the outer diameter of the base tube 100 is, the higher the heat transfer coefficient of the heat exchange tube is and the more the material consumption is; and within a certain range, the heat transfer coefficient and material consumption of the heat exchange tube increase with the increase of the tooth height of the internal thread 200. Considering the influence of the helix angle, number of teeth, tooth top angle, tooth height of the internal thread 200 and the outer diameter and wall thickness of the base tube 100 on the heat transfer coefficient and material consumption of the heat exchange tube, when the parameters of the heat exchange tube are set to the above range, the heat exchange tube can have a higher heat transfer coefficient and lower material consumption at the same time.
[0029] Specifically refer to Example 2 and Comparative Example 2 in Table 1, wherein the wall thickness, tooth top angle, and helix angle of the heat exchange tubes of the two are equal, the outer diameter of the base tube 100 in Example 2 is smaller than the outer diameter of the base tube 100 in Comparative Example 2, the tooth height of the internal thread 200 in Example 2 is smaller than the tooth height of the internal thread 200 in Comparative Example 2, and the number of teeth of the internal thread 200 in Example 2 is greater than the number of teeth of the internal thread 200 in Comparative Example 2, wherein the outer diameter of the base tube 100 in Example 2 is within the range of [4.85 mm, 4.95 mm], and the internal thread 20 0 is in the range of [0.13mm, 0.14mm], and the number of teeth is in the range of [36°, 40°]. Under these parameters, the heat transfer coefficient of the heat exchange tube in Example 2 is substantially the same as that of the heat exchange tube in Comparative Example 2. At the same time, the meter weight of the heat exchange tube in Example 2 is 1.5% lower than that of the heat exchange tube in Comparative Example 2. Thus, on the basis of ensuring that the heat exchange tube has a higher heat transfer coefficient, the material consumption is reduced by adjusting the parameters of the heat exchange tube, thereby correspondingly reducing the cost of the heat exchange tube, the heat exchanger and the air conditioner.
[0030] Specifically, in this embodiment, the tooth top angle range of the internal thread 200 is preferably [15°, 25°], and more preferably [15°, 20°]. A smaller tooth top angle is set to further improve the heat transfer coefficient of the heat exchange tube, while further reducing the material consumption of the heat exchange tube, thereby further improving the heat exchange effect of the heat exchanger and the air conditioner and further reducing the cost of the heat exchanger and the air conditioner.
[0031] This embodiment also provides a heat exchanger, including a plurality of heat exchange fins and a plurality of the above-mentioned heat exchange tubes, the plurality of heat exchange tubes are arranged in parallel, each heat exchange fin is penetrated by the plurality of heat exchange tubes, and the plurality of heat exchange fins are arranged at intervals along the length direction of the heat exchange tubes. Specifically, the heat exchange fins can be in the form of aluminum foil, and the heat exchange tubes can be penetrated by equipment such as a tube expander and be interference-fitted with the penetration holes to ensure sufficient heat exchange between the heat exchange tubes and the heat exchange fins, thereby further improving the heat exchange coefficient of the heat exchanger.
[0032] This embodiment also provides an air conditioner, including a compressor, an evaporator, a throttling assembly and a condenser. The compressor, evaporator, throttling assembly and condenser are connected through a refrigerant pipe to form a refrigerant circulation, and at least one of the evaporator and the condenser adopts the above-mentioned heat exchanger.
[0033] Table 2
[0034]
[0035] Table 2 is a performance test table of an air conditioner of model 26B3, when the heat exchange tubes in the evaporator and heat exchanger are heat exchange tubes of comparative example 2 or heat exchange tubes of embodiment 2. Among them, taking the heat exchange tubes in the evaporator and heat exchanger as the benchmark, when only the heat exchange tubes in the evaporator are replaced with the heat exchange tubes of embodiment 2, under the rated refrigeration condition, the evaporator's operating performance is the main and the condenser's operating performance is the auxiliary, the air conditioner's refrigeration capacity is increased by 0.15%, and the refrigeration power is reduced by 2.55%. It can be seen that not only the refrigeration capacity of the air conditioner is increased, but also the power consumption is reduced; under the rated heating condition, the condenser's operating performance is the main and the evaporator's operating performance is the auxiliary, the air conditioner's heating capacity is increased by 0.64%, the heating power is increased by 0.14%, the degree of increase in the air conditioner's heating capacity is greater than the power consumption, and the air conditioner has better performance.
[0036] When only the heat exchange tubes in the condenser are replaced with the heat exchange tubes of Example 2, under the rated refrigeration condition, with the operating performance of the evaporator as the main and the operating performance of the condenser as the auxiliary, the refrigeration capacity of the air conditioner is improved by 1.16%, and the refrigeration power is increased by 1.91%. The cooling capacity of the air conditioner is improved, but the power consumption is also increased; under the rated heating condition, the heating capacity of the air conditioner is improved by 0.03%, and the heating power is reduced by 0.43%, which not only improves the heating amount of the air conditioner, but also reduces the power consumption of the air conditioner, and the performance of the air conditioner is better.
[0037] When the heat exchange tubes of both the evaporator and the condenser are replaced with the heat exchange tubes of Example 2 at the same time, under the rated refrigeration condition, the refrigeration capacity of the air conditioner is increased by 1.85%, and the refrigeration power is increased by 1.00%, and the increase in the refrigeration capacity of the air conditioner is greater than the power consumption; under the rated heating condition, the heating capacity of the air conditioner is increased by 0.79%, and the heating power is reduced by 0.94%, which not only increases the heating amount of the air conditioner, but also reduces the power consumption of the air conditioner, and the performance of the air conditioner is better.
[0038] Table 3
[0039]
[0040] Table 3 is a performance test table of the air conditioner of model 35B1 when the heat exchange tubes in the evaporator and heat exchanger are the heat exchange tubes of comparative example 2 or the heat exchange tubes of embodiment 2. Among them, taking the heat exchange tubes in the evaporator and the heat exchanger as the benchmark, when only the heat exchange tubes in the evaporator are replaced with the heat exchange tubes of embodiment 2, under the rated refrigeration condition, the evaporator's operating performance is the main and the condenser's operating performance is the auxiliary, the air conditioner's refrigeration capacity is increased by 0.2%, and the refrigeration power is decreased by 1.4%. It can be seen that not only the refrigeration capacity of the air conditioner is increased, but also the power consumption is reduced; under the rated heating condition, the condenser's operating performance is the main and the evaporator's operating performance is the auxiliary, the air conditioner's heating capacity is decreased by 0.6%, the heating power is increased by 0.2%, the air conditioner's heating capacity is reduced and the power consumption is increased.
[0041] When only the heat exchange tubes in the condenser are replaced with the heat exchange tubes of Example 2, under the rated refrigeration condition, with the operating performance of the evaporator as the main and the operating performance of the condenser as the auxiliary, the refrigeration capacity of the air conditioner is improved by 5.2%, and the refrigeration power is reduced by 2.0%. The cooling capacity of the air conditioner is improved, and the power consumption is reduced; under the rated heating condition, the heating capacity of the air conditioner is improved by 2.3%, and the heating power is reduced by 0.5%, which not only improves the heating amount of the air conditioner, but also reduces the power consumption of the air conditioner, and the performance of the air conditioner is better.
[0042] When the heat exchange tubes of both the evaporator and the condenser are replaced with the heat exchange tubes of Example 2 at the same time, under the rated refrigeration condition, the refrigeration capacity of the air conditioner is increased by 3.8%, and the refrigeration power is reduced by 1.7%, which not only increases the refrigeration capacity of the air conditioner, but also reduces the power consumption of the air conditioner; under the rated heating condition, the heating capacity of the air conditioner is increased by 2.1%, and the heating power is reduced by 0.3%, which not only increases the heating amount of the air conditioner, but also reduces the power consumption of the air conditioner, and the performance of the air conditioner is better.
[0043] It can be seen that when the evaporator and condenser in the air conditioner adopt the heat exchange tubes provided in the embodiment of the present application, on the basis of reducing the material consumption of the heat exchange tubes and lowering the production cost, it can also effectively improve the heat exchange capacity of the air conditioner and reduce the power consumption of the air conditioner, thereby greatly improving the practicality of the air conditioner.
[0044] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.
[0045] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A heat exchange tube, characterized in that: The invention comprises a base pipe (100) and a plurality of internal threads (200) arranged on the inner wall of the base pipe (100), wherein the helix angle of the internal threads (200) is in the range of [18°, 25°], the number of teeth is in the range of [30, 50], and the tooth top angle is in the range of [5°, 35°].
2. The heat exchange tube according to claim 1, characterized in that: The number of teeth of the internal thread (200) is in the range of [35, 45].
3. The heat exchange tube according to claim 2, characterized in that: The number of teeth of the internal thread (200) is in the range of [36, 40].
4. The heat exchange tube according to any one of claims 1 to 3, characterized in that: The outer diameter of the base tube (100) is [4.85 mm, 4.95 mm], and the wall thickness is [0.18 mm, 0.22 mm].
5. The heat exchange tube according to any one of claims 1 to 3, characterized in that: The tooth height of the internal thread (200) is in the range of [0.13 mm, 0.15 mm].
6. The heat exchange tube according to claim 5, characterized in that: The tooth height range of the internal thread (200) is [0.13 mm, 0.14 mm].
7. The heat exchange tube according to any one of claims 1 to 3, characterized in that: The tooth top angle of the internal thread (200) is in the range of [15°, 25°].
8. The heat exchange tube according to claim 7, characterized in that: The tooth top angle of the internal thread (200) is in the range of [15°, 20°].
9. A heat exchanger, characterized in that: It comprises a plurality of heat exchange fins and a plurality of heat exchange tubes according to any one of claims 1 to 8, wherein the plurality of heat exchange tubes are arranged in parallel, each of the heat exchange fins is penetrated through the plurality of heat exchange tubes, and the plurality of heat exchange fins are arranged at intervals along the length direction of the heat exchange tubes.
10. An air conditioner, characterized in that: It includes a compressor, an evaporator, a throttling assembly and a condenser. The compressor, the evaporator, the throttling assembly and the condenser are connected through a refrigerant pipe to form a refrigerant circulation, and at least one of the evaporator and the condenser adopts the heat exchanger described in claim 9.