CN111442341A - Cooling fin, heating body and electric heater - Google Patents

Cooling fin, heating body and electric heater Download PDF

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Publication number
CN111442341A
CN111442341A CN202010405183.0A CN202010405183A CN111442341A CN 111442341 A CN111442341 A CN 111442341A CN 202010405183 A CN202010405183 A CN 202010405183A CN 111442341 A CN111442341 A CN 111442341A
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CN
China
Prior art keywords
heat
oil pocket
pipeline
heat dissipation
fin
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Pending
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CN202010405183.0A
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Chinese (zh)
Inventor
肖彪
赵树男
陈红
毕然
左双全
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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Priority to CN202010405183.0A priority Critical patent/CN111442341A/en
Publication of CN111442341A publication Critical patent/CN111442341A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D13/00—Electric heating systems
    • F24D13/04—Electric heating systems using electric heating of heat-transfer fluid in separate units of the system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/10—Arrangement or mounting of control or safety devices
    • F24D19/1096—Arrangement or mounting of control or safety devices for electric heating systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/08—Electric heater
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2220/00—Components of central heating installations excluding heat sources
    • F24D2220/20—Heat consumers
    • F24D2220/2009—Radiators
    • F24D2220/2036—Electric radiators

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)

Abstract

The invention provides a radiating fin, a heating body and an electric heater, which comprise an upper oil bag and a lower oil bag which are distributed along the vertical direction; the heat dissipation pipeline structure is used for containing a heat conducting medium and comprises a plurality of heat dissipation pipelines, the heat dissipation pipelines are communicated with an upper oil pocket and a lower oil pocket, and the heat dissipation pipelines are close to the cross-sectional area of the upper oil pocket and smaller than the cross-sectional area of the heat dissipation pipelines close to the lower oil pocket. Because the heat-conducting medium that the temperature is higher relatively when being close to the motion of last oil pocket, the cross-sectional area of the heat dissipation pipeline of top diminishes, leads to the heat-conducting medium that the temperature is higher relatively to rise efficiency and reduces, and the heat-conducting medium that the temperature is higher relatively who remains in the fin below becomes more, improves the effect of the temperature of fin below, reaches the temperature difference that reduces the fin upper and lower part, makes the temperature distribution of electric heater upper and lower part more even purpose.

Description

Cooling fin, heating body and electric heater
Technical Field
The invention relates to the technical field of household appliances, in particular to a radiating fin, a heating body and an electric heater.
Background
The oil heater electric heater is a common household heating device, as shown in fig. 1, the existing electric heater generally comprises a heat sink 1 and an oil path distributed on the heat sink 1. The oil path connects the upper oil pocket 11 and the lower oil pocket 12, wherein the horizontal position of the upper oil pocket 11 is relatively high. The oil circuit is internally provided with a heat-conducting medium, and the heating device is positioned in the lower oil pocket 12.
When the electric heater is started, the heating device in the lower oil pocket 12 heats the heat-conducting medium, the hot oil with relatively high temperature flows upwards from the middle oil way under the action of density difference, and the heat is transferred to the whole radiating fin in the flowing process, so that the integral temperature of the radiating fin is increased. The heat-conducting medium in the upper oil pocket 11 has a relatively low temperature, and gradually flows downwards through paths on two sides and is heated under the action of gravity, so that a large circulation is formed.
The existing electric heater has the following defects:
when the radiating fins generate heat, air near the radiating fins is driven to do natural convection motion, so that the temperature of the air below is relatively low, the temperature of the air above is relatively high, the difference of the ambient temperature of the upper part and the lower part of the radiating fins is large, and the radiating effect of the upper part and the lower part of the radiating fins is different. The temperature of the upper part is relatively high, the heat dissipation effect is relatively poor, the temperature of the heat dissipation fins is different, and the temperature of the upper heat dissipation fins is relatively high. For reasons of safety in use of the electric radiator, it is provided that the temperature rise at the edge 13 of the heat sink cannot exceed 85K. Thus, the heating power needs to be reduced when the temperature of the edge 13 of the upper part of the fin is about to reach the safety limit, while the temperature of the lower part of the fin is not yet sufficient for the heating requirement.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the defect that the heating requirement of a user cannot be met on the premise of safe use requirement due to uneven temperature distribution of the electric heater in the prior art, thereby providing the radiating fin, the heating body and the electric heater.
A heat sink, comprising:
an upper oil bag and a lower oil bag which are distributed along the vertical direction;
the heat dissipation pipeline structure is used for containing a heat conducting medium and comprises a plurality of heat dissipation pipelines, the heat dissipation pipelines are communicated with the upper oil pocket and the lower oil pocket, the heat dissipation pipelines are close to the cross sectional area of the upper oil pocket part and are smaller than the heat dissipation pipelines are close to the cross sectional area of the lower oil pocket part.
The heat dissipation pipeline includes:
and the diameter-variable part is used for connecting the parts with different cross-sectional areas of the heat dissipation pipeline.
The diameter-changing part is arranged in the middle of the heat dissipation pipeline in the length direction.
The cross-sectional area of the heat dissipation pipeline in the middle is larger than that of the heat dissipation pipeline arranged close to the edge of the cooling fin.
The heat dissipation pipeline includes:
the first pipeline divides the radiating fin into an upper radiating area and a lower radiating area with different horizontal heights along the vertical direction;
and the second pipeline is communicated with the first pipeline and the upper oil pocket and the lower oil pocket.
The first pipeline is arranged along the horizontal direction.
The shape of the second pipeline at least satisfies:
Wbc≤2Wbs；
0.1W＜Wbc＜0.2W；
wbc denotes the width of the second pipe below the first pipe in the middle; wbs denotes the width of the second pipe on both sides below the first pipe;
w denotes the width of the fin.
The shape of the second pipeline also satisfies:
Wtc≤2Wts；
0.1W＜Wtc＜0.2W；
wtc denotes the width of the second pipe above the first pipe in the middle; wts denotes the width of the second pipe line on both sides above the first pipe line.
The shape of the second pipeline also satisfies:
Wtc＜Wbc。
the shape of the second pipeline also satisfies:
0.2H＜Hb＜0.7H；
h represents the distance from the center of the upper oil pocket to the center of the lower oil pocket in the vertical direction;
hb denotes the length of the second line below the first line.
The shape of the second pipeline also satisfies:
0.3H＜Ht＜0.8H；
h represents the distance from the center of the upper oil pocket to the center of the lower oil pocket in the vertical direction;
ht represents the length of the second line above the first line.
A heat-generating body, comprising:
a plurality of the heat sinks of any of the above schemes, the plurality of heat sinks being arranged side by side with each other;
a heating rod simultaneously penetrating at the oil outlet position of each radiating fin.
An electric heater comprising:
the heating element of the above scheme;
the temperature control element is arranged on the heating body;
and the indicator light is arranged on the heating body and electrically connected with the temperature control element.
Further comprising:
and the auxiliary device is arranged on the heating body.
The technical scheme of the invention has the following advantages:
1. the invention provides a radiating fin, which comprises an upper oil pocket and a lower oil pocket; the heat dissipation pipeline structure is used for containing a heat conducting medium and comprises a plurality of heat dissipation pipelines, the heat dissipation pipelines are communicated with the upper oil pocket and the lower oil pocket, the heat dissipation pipelines are close to the cross sectional area of the upper oil pocket part and are smaller than the heat dissipation pipelines are close to the cross sectional area of the lower oil pocket part.
The upper oil pocket is positioned above the radiating fins, and the lower oil pocket is positioned below the radiating fins. When the radiating fin is used, the heating device is positioned in the oil outlet. When the plurality of radiating fins form the heating body, the heating device is also arranged corresponding to the oil outlet bag. The heat radiating pipes distributed on the heat radiating fins are filled with heat conducting media, and when the heat radiating fins work, the heat conducting media below the heat radiating fins are heated firstly. The heated heat-conducting medium moves upwards towards the upper oil pocket through the heat dissipation pipeline. Because the heat-conducting medium that the temperature is higher relatively when being close to the motion of last oil pocket, the cross-sectional area of the heat dissipation pipeline of top diminishes, lead to the rise of the heat-conducting medium that the temperature is higher relatively to be obstructed, make the heat-conducting medium that the temperature is higher relatively raise the efficiency and reduce, the heat-conducting medium that the temperature is higher relatively who remains in the fin below becomes more, thereby play the temperature that reduces the fin top, improve the effect of fin below temperature, reach the temperature difference that reduces the fin upper and lower part, make the temperature distribution of electric heater upper and lower part more even purpose. In the use process of the electric heater, because the temperature difference of the upper part and the lower part of the radiating fin is reduced, the situation that the edge part above the radiating fin reaches the safe temperature limit temperature when the temperature below the radiating fin is relatively low can not occur.
2. The invention provides a heat sink, the heat dissipation pipeline comprises: at least one first pipeline, the first pipeline divides the radiating fin into at least two radiating areas with different horizontal heights; and the second pipeline is communicated with the first pipeline and the upper oil pocket and the lower oil pocket.
The heat dissipation area which is positioned at the upper part and is relatively higher is closer to the upper oil pocket. The heat dissipation area which is positioned at the lower part and is relatively lower is closer to the lower oil pocket. When the heating device in the lower oil pocket heats the heat-conducting medium, the heat-conducting medium with relatively high temperature firstly rises into the first pipeline and then enters the heat-radiating pipeline above the first pipeline. Since the cross-sectional area of the upper heat dissipation pipeline is smaller, the space for the heat transfer medium with relatively high temperature to rise is reduced, and the heat transfer medium with lower temperature at the upper part also enters the first pipeline and flows to the heat dissipation area at the lower part. The heat conduction oil with relatively high temperature is shunted at the first pipeline to form a branch circulation, and the heat conduction medium which originally needs to rise together is shunted in the heat conduction medium of the branch circulation, so that the quantity of the heat conduction medium with relatively high temperature rising to the upper oil pocket is relatively reduced. The first pipeline also plays a role in strengthening convection heat transfer, and the temperature of the heat-conducting medium rising to the upper oil pocket is further reduced.
3. The invention provides a heat sink, the heat sink pipeline structure comprises: the first heat dissipation unit and the second heat dissipation unit are both formed by the second pipeline, the second heat dissipation unit is arranged relative to the edge, close to the radiating fins, of the first heat dissipation unit, the second heat dissipation unit is arranged on the two sides, corresponding to the width direction of the radiating fins, of the first heat dissipation unit, and the cross sectional area of the second pipeline of the first heat dissipation unit is not smaller than that of the second pipeline of the second heat dissipation unit.
The second pipeline positioned in the middle corresponds to the heating device, the cross section area of the second pipeline in the part is relatively larger, more heated heat-conducting media with relatively higher temperature can be gathered and raised from the middle part, and therefore the quantity of the heat-conducting media with relatively high temperature flowing to the second heat dissipation units on the two sides is reduced, heat transfer to the edge part is weakened, and temperature rise of the edge is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic diagram of background art;
FIG. 2 is a schematic structural view of a heat dissipation pipeline structure having only a second pipeline;
FIG. 3 is a schematic diagram illustrating a heat sink tubing arrangement including a first tubing and a second tubing arrangement;
FIG. 4 is a schematic view showing a structure in which the first pipe is disposed near the drain pocket;
FIG. 5 is a schematic diagram showing the first conduit disposed adjacent to the upper oil package;
FIG. 6 is a schematic diagram showing the distribution of the temperature of the heat sink when the cross-sectional areas of the second tubes on the upper and lower sides of the first tube are the same;
FIG. 7 is a schematic diagram showing a fin temperature profile with a relatively small cross-sectional area of a second tube above a first tube;
fig. 8 is a diagram showing the change in the temperature of the heat sink when the value of x is changed in the experimental process in example 2.
Description of reference numerals:
1. a heat sink; 11. feeding oil; 12. discharging oil; 13. an edge; 2. a first heat transfer unit; 3. a second heat transfer unit; 4. a first pipeline; 5. a second pipeline; 51. a diameter-variable portion.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but 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 thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1
The present invention provides a heat sink, as shown in fig. 2, comprising an upper oil pocket 11 and a lower oil pocket 12 distributed along a vertical direction; the heat dissipation pipeline structure is used for containing a heat conducting medium and comprises a plurality of heat dissipation pipelines, the heat dissipation pipelines are communicated with an upper oil pocket 11 and a lower oil pocket 12, and the heat dissipation pipelines are close to the cross sectional area of the upper oil pocket 11 and smaller than the cross sectional area of the heat dissipation pipelines close to the lower oil pocket 12. Since the heating device is positioned in the lower oil pocket 12 and the upper oil pocket 11 is positioned above the radiating fins, the lower oil pocket 12 is positioned below the radiating fins 1. When the radiating fin 1 is used, the heating device is positioned in the oil drain pocket. When the plurality of fins 1 constitute a heat generating body, the heating means is also provided corresponding to the oil discharging pocket 12. The heat dissipation pipelines distributed on the heat dissipation fins 1 are filled with heat conduction media. When the radiating fin 1 works, the heat conducting medium below the radiating fin 1 is heated firstly. The heated heat-conducting medium moves upwards towards the upper oil pocket 11 through the heat-radiating pipeline. Because the heat-conducting medium that the temperature is higher relatively is when being close to last oil pocket 11 motion, the cross-sectional area of the heat dissipation pipeline of top diminishes, the rise that leads to the heat-conducting medium that the temperature is higher relatively is obstructed, the heat-conducting medium that leads to the temperature is higher relatively raises the efficiency and reduces, the relatively higher heat-conducting medium of temperature who remains in fin 1 below becomes more, thereby play and reduce the temperature of fin 1 top, improve the effect of the temperature of fin 1 below, reach the temperature difference that reduces fin 1 upper and lower part, make the temperature distribution of electric heater upper and lower part more even purpose. In the use process of the electric heater, because the temperature difference of the upper part and the lower part of the radiating fin 1 is reduced, the situation that the edge 13 part above the radiating fin 1 reaches the safe temperature limit temperature when the temperature below the radiating fin 1 is relatively low can not occur.
The structure of the heat dissipation pipeline is not particularly limited, and in this embodiment, as shown in fig. 2, the heat dissipation pipeline includes: the diameter-variable portion 51 is used for connecting the portions of the heat dissipation pipeline with different cross-sectional areas by the diameter-variable portion 51. The diameter-variable portion 51 can play a role of guiding when the cross-sectional area of the pipe through which the heat transfer medium flows changes. The reducing portion 51 in this embodiment is equivalent to providing a transition section in which the cross-sectional area gradually changes. As an alternative embodiment, the reducing portion 51 is a stepped surface, so that the flow path of the heat transfer medium is abruptly reduced.
As shown in fig. 2, the diameter-variable portion 51 is provided at the middle portion in the longitudinal direction of the heat radiation pipe. The part of the diameter-variable part 51 prevents the flow of the heat-conducting medium to a certain extent, the degree of the heat-conducting medium colliding with the inner wall of the heat-radiating pipeline is stronger, and the temperature of the part of the diameter-variable part 51 is relatively higher. Such a portion with a relatively higher temperature, which is located in the middle of the heat sink 1, can ensure that the temperatures of the upper and lower portions of the heat sink 1 are more uniform. As an alternative embodiment, the diameter-variable portion 51 is disposed near the oil discharging pocket 12, and when the temperature of the upper portion of the fin 1 is still high, the height of the diameter-variable portion 51 is adjusted downward, so that the temperature of the upper portion of the fin 1 can be relatively lowered. The temperature distribution of the heat sink 1 as a whole is made more uniform. Similarly, as another alternative embodiment, when the cross-sectional area of the heat dissipation pipeline above the heat dissipation plate 1 is smaller, which results in a relatively low temperature above the heat dissipation plate 1, the temperature distribution of the heat dissipation plate 1 as a whole can be more uniform by adjusting the diameter portion 51.
In this embodiment, as shown in fig. 2, the cross-sectional area of the heat dissipation channel located in the middle is larger than the cross-sectional area of the heat dissipation channel located near the edge 13 of the heat sink 1. The heat dissipation pipeline positioned in the middle corresponds to the heating device, the cross section area of the heat dissipation pipeline of the part is relatively larger, and more heated heat-conducting media with relatively higher temperature can be gathered and raised from the middle part. Therefore, the quantity of the heat-conducting medium with relatively high temperature flowing to the heat dissipation pipelines at the two sides is reduced, the heat is weakened to be transferred to the edge 13, and the temperature rise of the edge 13 is reduced.
As shown in fig. 3 to 5, the heat dissipation pipeline includes: the first pipeline 4 divides the radiating fin 1 into at least two radiating areas with different horizontal heights along the vertical direction; and the second pipeline 5 is communicated with the first pipeline 4 and the upper oil pocket 11 and the lower oil pocket 12. The heat dissipation area which is positioned at the upper part and is relatively higher is closer to the upper oil pocket 11. The lower heat dissipation area is relatively close to the lower oil pocket 12. When the heating device in the lower oil pocket 12 heats the heat-conducting medium, the heat-conducting medium with relatively high temperature first rises into the first pipeline 4, and then enters the heat-dissipating pipeline above the first pipeline 4. Since the cross-sectional area of the upper heat dissipation pipe is smaller, the space in which the heat transfer medium having a relatively high temperature can rise is reduced, and the heat transfer medium having a relatively low upper temperature also enters the first pipe 4 and flows toward the lower heat dissipation area. The heat conduction oil with relatively high temperature is shunted at the first pipeline 4 to form a branch circulation, and the heat conduction medium which originally needs to rise together is shunted in the heat conduction medium of the branch circulation, so that the quantity of the heat conduction medium with relatively high temperature rising to the upper oil pocket 11 is relatively reduced. The first pipeline 4 also plays a role in enhancing the heat convection, and further reduces the temperature of the heat-conducting medium rising to the upper oil pocket 11.
In this embodiment, as shown in fig. 3 to 5, the first pipe 4 is arranged in a horizontal direction. When the heat-conducting medium with relatively high temperature rises from the middle heat-radiating pipeline and enters the first pipeline 4, the heat-conducting medium can flow towards two sides in a shunting manner more uniformly, and the uniformity of the overall temperature distribution of the radiating fin 1 is improved.
The position of the first pipe 4 is not particularly limited, and in the present embodiment, as shown in fig. 4, the first pipe 4 is disposed near the lower oil pocket 12. The first pipeline 4 is close to the lower oil pocket 12, so that on one hand, a high-temperature heat-conducting medium with relatively high temperature can enter the first pipeline 4 for heat exchange in advance. On the other hand, the high-temperature heat-conducting medium is converged in the first pipeline 4 and then rises through the plurality of second pipelines 5, so that the high-temperature heat-conducting oil in the first pipeline 4 forms a region with relatively high temperature at the first pipeline 4. When the first pipeline 4 is arranged close to the lower oil pocket 12, the area with relatively high temperature is moved downwards, so that the temperature of the upper radiating fin is reduced, and the temperature difference between the upper part and the lower part of the radiating fin 1 is reduced. As an alternative embodiment, as shown in fig. 5, the first pipe 4 is disposed near the upper oil pocket 11.
As shown in fig. 3-5, the cross-sectional area of the second pipeline 5 between the first pipeline 4 and the upper oil pocket 11 is smaller than that of the second pipeline 5 between the first pipeline 4 and the lower oil pocket 12. After the heat-conducting medium with relatively high temperature enters the first pipeline 4, the heat-conducting medium with relatively high temperature is blocked from rising continuously, the rising efficiency of the heat-conducting medium with relatively high temperature is reduced, and the heat-conducting medium with relatively high temperature reserved below the radiating fin 1 becomes more, so that the temperature above the radiating fin 1 is reduced, the temperature below the radiating fin 1 is improved, the temperature difference of the upper part and the lower part of the radiating fin 1 is reduced, and the purpose of more uniform temperature distribution of the upper part and the lower part of the electric heater is achieved.
In this embodiment, as shown in fig. 4 and 5, the heat dissipation pipeline structure includes: the first heat dissipation unit and the second heat dissipation unit are respectively formed by second pipelines 5, the second heat dissipation unit is arranged close to the edge 13 of the radiating fin 1 relative to the first heat dissipation unit, the two sides of the first heat dissipation unit corresponding to the width direction of the radiating fin 1 are respectively provided with the second heat dissipation unit, and the cross sectional area of the second pipeline 5 forming the first heat dissipation unit is not smaller than that of the second pipeline 5 forming the second heat dissipation unit. The second pipeline 5 positioned in the middle corresponds to the heating device, the cross section area of the pipeline of the second pipeline 5 in the part is relatively larger, more heated heat-conducting media with relatively higher temperature can be gathered and raised from the middle part, and therefore the amount of the heat-conducting media with relatively high temperature flowing to the second heat radiating units on two sides is reduced, the heat transfer to the edge 13 is weakened, and the temperature rise of the edge 13 is reduced.
In order to further embody the practical effect of the improved technical solution of the present embodiment, as shown in fig. 6 and 7. The technical scheme that a first pipeline 4 and three second pipelines 5 are horizontally arranged and the cross sections of the three second pipelines 5 on the upper side and the lower side of the first pipeline 4 are consistent is adopted as a comparison group as shown in fig. 6. The embodiment of fig. 7 corresponds to the embodiment of fig. 6, in which the cross-sectional area of the second pipe 5 above the first pipe 4 is reduced. As shown in fig. 6 and 7, under the same working environment and for the same time, the improved technical scheme of fig. 7 is summarized, so that the temperature above the heat sink 1 is obviously reduced, and the difference between the temperatures of the upper and lower edges 13 of the heat sink 1 is reduced. At this time, the heating power of the heat sink 1 is continuously increased, and the temperatures of the upper part and the lower part of the heat sink 1 still have further increased space, so that the requirements of users are met on the premise of safe use.
In the present embodiment, the heat radiating fins 1 can be used for generating heat individually, and a heat generating body may be constituted by a plurality of heat radiating fins 1. The way of the radiating fins forming the heating body is not limited in particular, namely the radiating fins can be formed by combining a plurality of mutually independent radiating fins 1, the radiating fins 1 can be communicated, at least the oil discharging bags of adjacent radiating fins are communicated, and then the heating rods are connected in series in the oil discharging bags, so that the radiating fins share the same heating rod. The radiating fins can be arranged side by side, and the heating rod is linear at the moment. When the distribution structure of the radiating fins is required to be adjusted according to the actual use environment, if the radiating fins are arranged in a staggered mode, the heating rod is in a broken line or a curve shape.
As a further limiting embodiment, the heat sink 1 can also be assembled to constitute an electric radiator. A temperature control element and an indicator light are additionally arranged on the radiating fin 1 or the heating body. Through a preset control program, the heating rod is controlled to work after being electrified, so that the radiating fin 1 and/or the heating body are driven to heat and work.
The structure of the electric heater is not particularly limited, and as a further limited embodiment, the heating element is further provided with an auxiliary device. Auxiliary devices include, but are not limited to: the clothes hanger is arranged above the heating body and is suitable for drying clothes and the like. The auxiliary device can also be a movable support which is arranged at the bottom of the heating body and used for supporting the heating body or driving the heating body to move. The movable support can be of a folding structure and also can be of an integrally formed structure, when the folding structure is adopted, the space occupation amount is reduced conveniently when the movable support is idle, and the storage efficiency of the electric heater is improved.
Example 2
On the basis of embodiment 1, as shown in fig. 3, the width of the fin 1 is W, and the height difference in the vertical direction between the center of the upper oil pocket 11 and the center of the lower oil pocket 13 is H. The first pipeline 4 divides the second pipeline 5 into an upper part and a lower part, the height of the second pipeline 5 above the first pipeline 4 is Ht, and the height of the second pipeline 5 below the first pipeline 4 is Hb. Above the first pipe line 4, the second pipe line 5 located in the middle has a width Wtc, and the second pipe lines 5 located on both sides have a width Wts. Below the first pipe line 4, the second pipe line 5 located in the middle has a width Wbc, and the second pipe lines 5 located on both sides have a width Wbs. With the above embodiment further defined, Wbc ≦ 2 Wbs. As a further limited technical scheme 0.1W < Wbc < 0.2W.
In addition to the above embodiments, as a further limited embodiment, Wtc ≦ 2 Wts. As a further limited embodiment, 0.1W < Wtc < 0.2W. As an alternative embodiment, 0.1W ═ Wtc, or Wtc ═ 0.2W.
The shape of the second pipe 5 is not particularly limited, and in addition to the above-described embodiments, embodiments after further limitation are such that Wtc < Wbc. As an alternative embodiment, Wtc ═ Wbc.
The position where the first pipe line 4 is disposed is not particularly limited, and in the above embodiment, the first pipe line 4 is disposed at the middle in the longitudinal direction of the second pipe line 5, where Hb is 0.5H. Alternatively, 0.2H < Hb < 0.7H and/or 0.3H < Ht < 0.8H.
In order to improve the specific shape of the second pipeline 5, the heating requirement of a user is met, and the edge temperature rise is reduced. As shown in fig. 3, in this embodiment, a first pipeline 4 and three second pipelines 5 are distributed on a heat sink 1 as an example, so as to perform heating and temperature rise experiments.
The experimental working condition is that the ambient temperature is 23 +/-2 ℃, and the heating power during the experiment is 2200W. As shown in fig. 3, when Hb ═ Ht ═ 0.5H, 2Wts ═ Wtc ═ 0.1W, and 2Wbs ═ Wbc. While changing the value x, the edge temperature Tt near the upper pocket 11, the edge temperature Tb near the lower pocket 12, and the edge average temperature Tav are observed. Wherein, the value x is Wbc/Wtc;
Tt＝15.98x2-78.02x+161.99；
Tb＝-10.80x2+42.85x+21.97；
Tav＝-18.26x2+64.28x+28.61。
see fig. 8 for experimental data, wherein the X value is shown on the abscissa and the temperature is shown on the ordinate. Wherein:
the temperature change curve marked by the circular points represents the temperature change of the fin 1 near the upper oil pocket 11;
the temperature change curve marked by the triangular points represents the temperature change of the fin 1 near the lower oil pocket 12;
the temperature change curve marked by rectangular dots represents the average temperature change of the entire heat sink 1.
Where R2 is a decision coefficient, also called a decision coefficient, it is understood that in linear regression, regression can account for the ratio of the sum of squared deviations to the sum of squared deviations, which is equal in value to the square of the correlation coefficient R. The larger R2, the more accurate the fitting result and the more significant the regression effect. The R square is between 0 and 1, the closer to 1, the better the regression fitting effect is, and generally, the model fitting goodness of more than 0.8 is considered to be higher.
From the experimental results, the average temperature of the heat sink 1 is quadratic in x. When x reaches around 1.6, the average temperature of the heat sink does not increase as x increases. The edge near the upper oil pocket always decreases with the increase of x, the temperature of the edge near the lower oil pocket always increases with the increase of x, but the change rate of the two becomes slower with the increase of x. When x is larger than 1.6, namely, the width of the middle second pipeline 5 is 1.6 times larger than the width of the middle second pipeline 5 above the first pipeline 4, the average temperature of the radiating fins is basically unchanged, so that the heat radiating capacity of the electric heater formed by the radiating fins 1 is fixed, if the temperature rise edges meet the requirement of 85K, x does not need to be increased, the use of heat conducting oil is prevented from being increased, and the cost is increased.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims (14)

1. A heat sink, comprising:
an upper oil pocket (11) and a lower oil pocket (12);
the heat dissipation pipeline structure is used for containing a heat conducting medium and comprises a plurality of heat dissipation pipelines, the heat dissipation pipelines are communicated with the upper oil pocket (11) and the lower oil pocket (12), the heat dissipation pipelines are close to the cross sectional area of the upper oil pocket (11) part and are smaller than the heat dissipation pipelines are close to the cross sectional area of the lower oil pocket part.
2. The heat sink as recited in claim 1 wherein the heat dissipation conduit comprises:
and the diameter-variable part (51) is used for connecting parts with different cross-sectional areas of the heat dissipation pipeline, and the diameter-variable part (51) is used for connecting the parts with different cross-sectional areas.
3. The fin according to claim 2, wherein the diameter-varying portion (51) is provided at a middle portion in a longitudinal direction of the heat radiating pipe.
4. A heat sink according to any one of claims 1-3, characterised in that the cross-sectional area of the heat dissipating ducts in the middle is larger than the cross-sectional area of the heat dissipating ducts arranged close to the edge (13) of the heat sink.
5. The heat sink as recited in claim 1 wherein the heat dissipation conduit comprises:
at least one first pipe (4), said first pipe (4) dividing the heat sink into at least two heat dissipation areas of different horizontal heights;
and the second pipeline (5) is communicated with the first pipeline (4) and the upper oil pocket (11) and the lower oil pocket (12).
6. A fin as claimed in claim 5, characterised in that said first tubes (4) are arranged in a horizontal direction.
7. A fin as claimed in claim 5, characterised in that said second tube (5) has a shape such as to satisfy at least:
Wbc≤2Wbs；
0.1W＜Wbc＜0.2W；
wbc represents the width of the second pipeline (5) below the first pipeline (4) and in the middle part;
wbs denotes the width of the second pipe (5) on both sides below the first pipe (4);
w denotes the width of the fin.
8. A fin as claimed in claim 7, characterised in that said second tube (5) has a shape such as to also satisfy:
Wtc≤2Wts；
0.1W＜Wtc＜0.2W；
wtc represents the width of the second pipeline (5) above the first pipeline (4) in the middle;
wts denotes the width of the second pipe line (5) on both sides above the first pipe line (4).
9. A fin as claimed in any one of claims 7 to 8, wherein said second tube (5) is also shaped so as to satisfy:
Wtc＜Wbc。
10. a fin as claimed in claim 9, characterised in that said second tube (5) has a shape such as to also satisfy:
0.2H＜Hb＜0.7H；
h represents the distance from the center of the upper oil pocket to the center of the lower oil pocket in the vertical direction;
hb represents the length of the second line (5) below the first line (4).
11. A fin as claimed in claim 9, characterised in that said second tube (5) has a shape such as to also satisfy:
0.3H＜Ht＜0.8H；
h represents the distance from the center of the upper oil pocket to the center of the lower oil pocket in the vertical direction;
ht represents the length of the second line (5) above the first line (4).
12. A heat-generating body, characterized by comprising:
-a number of cooling fins according to any one of claims 1-11, -a number of said cooling fins (1) being arranged alongside each other;
a heating rod simultaneously penetrating at the position of the lower oil pocket (12) of each radiating fin (1).
13. An electric heater, comprising:
a heat-generating body as described in claim 12;
the temperature control element is arranged on the heating body;
and the indicator light is arranged on the heating body and electrically connected with the temperature control element.
14. The electric heater of claim 13, further comprising:
and the auxiliary device is arranged on the heating body.
CN202010405183.0A 2020-05-13 2020-05-13 Cooling fin, heating body and electric heater Pending CN111442341A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010405183.0A CN111442341A (en) 2020-05-13 2020-05-13 Cooling fin, heating body and electric heater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010405183.0A CN111442341A (en) 2020-05-13 2020-05-13 Cooling fin, heating body and electric heater

Publications (1)

Publication Number Publication Date
CN111442341A true CN111442341A (en) 2020-07-24

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010405183.0A Pending CN111442341A (en) 2020-05-13 2020-05-13 Cooling fin, heating body and electric heater

Country Status (1)

Country Link
CN (1) CN111442341A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021139369A1 (en) * 2020-01-06 2021-07-15 珠海格力电器股份有限公司 Cooling fin and heater

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021139369A1 (en) * 2020-01-06 2021-07-15 珠海格力电器股份有限公司 Cooling fin and heater

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