CN112082400A - Heat exchanger and heat exchanger system - Google Patents
Heat exchanger and heat exchanger system Download PDFInfo
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- CN112082400A CN112082400A CN202011036228.8A CN202011036228A CN112082400A CN 112082400 A CN112082400 A CN 112082400A CN 202011036228 A CN202011036228 A CN 202011036228A CN 112082400 A CN112082400 A CN 112082400A
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- heat
- heat conduction
- heat exchanger
- conduction part
- fins
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
- F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
- F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
- F28D1/053—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
- F28D20/02—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using latent heat
- F28D20/021—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using latent heat the latent heat storage material and the heat-exchanging means being enclosed in one container
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
- F28F21/06—Constructions of heat-exchange apparatus characterised by the selection of particular materials of plastics material
- F28F21/062—Constructions of heat-exchange apparatus characterised by the selection of particular materials of plastics material the heat-exchange apparatus employing tubular conduits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
- F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
- F28F21/081—Heat exchange elements made from metals or metal alloys
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2215/00—Fins
- F28F2215/10—Secondary fins, e.g. projections or recesses on main fins
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
Abstract
The invention relates to the technical field of heat exchangers, and discloses a heat exchanger and a heat exchanger system. The heat exchanger comprises a calandria and fins, wherein the fins are arranged on the outer wall of the calandria, and the height of the fins extends along the radial direction of the calandria. The fin includes first fin and second fin, and the face of first fin is parallel with the axis of calandria, and the face of second fin is perpendicular with the axis of calandria. The first fin comprises a first heat conduction part and a second heat conduction part which are sequentially connected with the calandria, and the heat conductivity coefficient of the second heat conduction part is smaller than that of the first heat conduction part and that of the calandria. The second fin comprises a third heat conduction part and a fourth heat conduction part which are sequentially connected with the calandria, and the heat conductivity coefficient of the fourth heat conduction part is smaller than that of the third heat conduction part and that of the calandria. According to the heat exchanger provided by the invention, the heat conductivity coefficients of the second heat conduction part and the fourth heat conduction part are lower, the phase-change solid substance can be prevented from annularly wrapping the discharge pipe, the separation time of the phase-change solid substance is shortened, and the heat exchange efficiency is improved.
Description
Technical Field
The invention relates to the technical field of heat exchangers, in particular to a heat exchanger and a heat exchanger system.
Background
Along with the improvement of living standard of people, the demand of energy is more and more large, such as refrigeration of a central air conditioner, heating in winter in the north, logistics cold supply chain, large-scale heat storage and cold storage and the like. The heat transfer between the cold and the hot involves the use of heat exchangers. For conventional fluid medium heat transfer and exchange, the high heat exchange efficiency can be realized by improving the heat conductivity coefficient of the heat exchanger material, increasing the heat exchange area and improving the flow speed of the conventional fluid, and the national requirements on energy conservation and emission reduction can be met. However, some heat exchanger systems involve phase change of the medium, especially gas-solid and liquid-solid phase change heat transfer systems, which are often complicated. When the fluid medium receives cold or releases heat, the fluid medium is changed into solid by phase change, and the fluid medium often wraps the heat exchanger; and the thickness of the solid is larger and larger along with the time, because the heat conduction system of the phase-change solid substance is not very large and is generally between 0.1 and 3W/(m.K), the heat resistance generated by the solid substance is larger and larger, the heat exchange efficiency of the heat exchanger is seriously influenced, meanwhile, the flow velocity of the fluid medium is increased, and the improvement of the heat exchange efficiency of the heat exchanger is very little.
At present, the cold energy is transmitted to the fluid medium at the temperature lower than the phase change temperature, when the thickness of the solid substance is too large, the heat exchanger is switched to a heating mode to the temperature higher than the phase change temperature, so that the surface of the phase change solid substance attached to the heat exchanger is liquefied, and finally the solid substance falls off from the heat exchanger. However, this liquefaction time is often relatively long, which results in a large loss of transmitted refrigeration. Therefore, it is necessary to optimize the structure of the heat exchanger related to such phase change, accelerate the falling time of the phase change solid matter, reduce the loss of cooling capacity, and improve the heat exchange efficiency of the heat exchanger.
Disclosure of Invention
A first object of the present invention is to provide a heat exchanger, which can shorten the time for phase-change solid substances to escape and improve the heat exchange efficiency of the heat exchanger.
The second purpose of the invention is to provide a heat exchanger system, which can make the phase-change solid substance fall off quickly by applying the heat exchanger, thereby improving the heat exchange efficiency of the heat exchanger system.
In order to achieve the purpose, the invention adopts the following technical scheme:
a heat exchanger, the heat exchanger comprising:
the heat exchange assembly comprises a row pipe and fins, secondary refrigerant or heat carrier can be introduced into the row pipe, the fins are arranged on the outer wall of the row pipe, and the height of the fins extends along the radial direction of the row pipe;
the fins comprise a first fin and a second fin, the plate surface of the first fin is parallel to the axis of the tube bank, and the plate surface of the second fin is vertical to the axis of the tube bank;
the first fin comprises a first heat conducting part and a second heat conducting part which are sequentially connected with the rack pipe, and the heat conductivity coefficient of the second heat conducting part is smaller than that of the first heat conducting part and that of the rack pipe;
the second fin include with the third heat conduction portion and the fourth heat conduction portion that the calandria connected gradually, the coefficient of heat conductivity of fourth heat conduction portion is less than the coefficient of heat conductivity of third heat conduction portion with the coefficient of heat conductivity of calandria.
As the preferred scheme of the heat exchanger, at least two groups of the heat exchange assemblies are arranged at intervals, the heat exchanger further comprises connecting pipes and heat insulation layers, the first ends of the adjacent two calandria pipes are communicated through the connecting pipes, the heat insulation layers wrap the connecting pipes, and the heat conductivity coefficient of the heat insulation layers is smaller than that of the calandria pipes.
As a preferable mode of the heat exchanger, the first fins are symmetrically arranged on the upper and lower sides of the tube bank, the second fins are symmetrically arranged on the left and right sides of the tube bank, and the second fins are connected with the first fins on the upper and lower sides of the tube bank.
Preferably, the plurality of second fins are arranged at intervals along an axis of the row of tubes.
As a preferable scheme of the heat exchanger, the heat conductivity coefficient of the calandria is 5-500W/(m.k); and/or
The first heat conduction part and the third heat conduction part have heat conductivity coefficients of 5-500W/(m.K); and/or
The second heat conduction part and the fourth heat conduction part have a heat conduction coefficient of 0.01-0.3W/(m.K).
As a preferable scheme of the heat exchanger, the calandria is made of copper, aluminum or stainless steel material; and/or
The first heat conducting part is made of copper, aluminum or stainless steel materials; and/or
The third heat conducting part is made of copper, aluminum or stainless steel materials; and/or
The second heat conduction part is made of plastic or rubber; and/or
The fourth heat conduction portion is made of plastic or rubber.
As a preferable scheme of the heat exchanger, the heat conduction coefficient of the heat-insulating layer is 0.01-0.3W/(m.K).
Preferably, the heat-insulating layer is made of plastic or rubber.
A heat exchanger system comprising a heat exchanger as described above.
The heat exchanger system preferably further comprises a switching valve, a low-temperature cold source and a high-temperature heat source, wherein the low-temperature cold source and the high-temperature heat source are connected with the discharge pipe through the switching valve, and a secondary refrigerant or a heat-carrying agent is introduced into the discharge pipe.
The invention has the beneficial effects that:
according to the heat exchanger provided by the invention, when the cold releasing working condition is adopted, the calandria is introduced with the secondary refrigerant for cold releasing, and the second heat conducting part far away from the calandria is smaller than the heat conductivity coefficients of the calandria and the first heat conducting part, so that the growth speed of the phase change solid substances on the second heat conducting part is very slow, the second heat conducting part has a certain height, and the phase change solid substances on two sides of the calandria generally cannot cross the top of the second heat conducting part to be connected into a whole, so that the second heat conducting part plays an isolation role; when the solid matter on the calandria and the fin grows to a certain thickness and the growth speed becomes very slow, the heat carrier is introduced into the calandria, so that the surface temperature of the calandria and the fin exceeds the melting temperature of the solid matter, the phase-change solid matter attached to the surfaces of the calandria and the fin is liquefied quickly, and the solid matter falls off from the two sides of the calandria easily under the action of gravity due to the difference between the solid density and the liquid density of the phase-change solid matter. After the solid matter falls off, the secondary refrigerant can be introduced into the calandria again, so that a cooling-heating periodic heat exchange process is formed. The heat exchanger provided by the invention has the following advantages: (1) the heat conduction coefficient of the first heat conduction part is higher, so that the heat exchange area can be effectively increased, and the heat exchange efficiency is improved; (2) the second heat conducting part has a lower heat conductivity coefficient and has an isolation effect, so that the phase change solid substances on the two sides of the calandria are divided into two blocks under the cooling-releasing working condition, a cylindrical solid block is prevented from being formed, the phase change solid substances are prevented from completely wrapping the calandria, the time for separating the phase change solid substances under the heating working condition is greatly shortened, the input heat is reduced, and the cooling-releasing quantity in the cooling-heating period is improved; (3) the phase-change solid substance on the calandria can be removed quickly, so that the thermal resistance formed by the phase-change solid substance can be limited to a lower value, thereby greatly improving the cold-releasing and heat-exchanging efficiency of the heat exchanger and greatly shortening the cold-releasing time; (4) the heat exchange efficiency is improved, so that the volume of the heat exchanger can be effectively reduced, and the manufacturing cost of equipment is reduced.
According to the heat exchanger system provided by the invention, the phase change solid substance can be quickly dropped off by applying the heat exchanger, so that the heat exchange efficiency of the heat exchange system is improved.
Drawings
FIG. 1 is a schematic structural diagram of a heat exchanger according to a first embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a row of tubes and fins provided by an embodiment of the invention;
FIG. 3 is a cross-sectional view of a row of tubes and fins provided in accordance with one embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a heat exchanger system according to a second embodiment of the present invention;
fig. 5 is a schematic structural diagram of a heat exchanger system according to a third embodiment of the present invention.
In the figure:
1-a heat exchanger; 11-calandria; 12-a fin; 121-a first heat conducting portion; 122-a second heat conducting portion; 123-a third heat conducting portion; 124-a fourth heat conducting portion; 13-a connecting tube; 14-insulating layer; 15-entrance and exit;
2-a cold storage tank;
3, filtering the filter screen;
4-a circulation assembly; 41-a circulation pipeline; 411-inlet; 412-an outlet; 42-a valve; 43-a water pump; 44-water distributor spray head;
5-a switching valve;
6-low temperature cold source and high temperature heat source.
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 of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
Example one
As shown in fig. 1-3, the present embodiment provides a heat exchanger, in which the heat exchanger 1 includes a heat exchange assembly, the heat exchange assembly includes a row tube 11 and fins 12, a coolant or a heat carrier can be introduced into the row tube 11, the fins 12 are disposed on an outer wall of the row tube 11, and a height of the fins 12 extends along a radial direction of the row tube 11. The fins 12 include a first fin and a second fin, the plate surface of the first fin is parallel to the axis of the tube bank 11, and is equivalent to a longitudinal fin of the first fin, and the plate surface of the second fin is perpendicular to the axis of the tube bank 11, and is equivalent to a transverse fin of the second fin. The first fin includes a first heat conduction portion 121 and a second heat conduction portion 122 sequentially connected to the bank tube 11, and a heat conductivity coefficient of the second heat conduction portion 122 is smaller than a heat conductivity coefficient of the first heat conduction portion 121 and a heat conductivity coefficient of the bank tube 11. The second fin includes a third heat conduction portion 123 and a fourth heat conduction portion 124 sequentially connected to the tube bank 11, and a heat conductivity coefficient of the fourth heat conduction portion 124 is smaller than a heat conductivity coefficient of the third heat conduction portion 123 and a heat conductivity coefficient of the tube bank 11.
In the heat exchanger provided by the embodiment, when the cooling working condition is met, the calandria 11 is introduced with the coolant for cooling, since the second heat transfer part 122 located farther from the discharge tube 11 has a smaller heat conductivity than the discharge tube 11 and the first heat transfer part 121, and the heat conductivity of the fourth heat transfer portion 124 farther from the bank pipe 11 is smaller than the heat conductivity of the bank pipe 11 and the heat conductivity of the third heat transfer portion 123, the growth speed of the phase-change solid matter on the second and fourth heat transfer parts 122 and 124 is slow, and the second heat conduction part 122 and the fourth heat conduction part 124 have a certain height, the phase-change solid substances on both sides of the calandria 11 generally cannot cross the top parts of the second heat conduction part 122 and the fourth heat conduction part 124 to be connected into a whole, that is, the phase-change solid substances are changed into a semi-circular cylindrical shape by the isolation effect of the longitudinal first fins, the isolation effect of the transverse second fins ensures that the phase-change solid substance is cut off into a shorter semi-circular cylindrical shape; when the solid matters on the calandria 11 and the fins 12 grow to a certain thickness and the growing speed becomes very slow, the heat carrier is introduced into the calandria 11, so that the surface temperature of the calandria 11 and the fins 12 exceeds the melting temperature of the solid matters, the phase-change solid matters adhered to the surfaces of the calandria 11 and the fins 12 are liquefied quickly, and the solid matters are easy to fall off from the two sides of the calandria 11 under the action of gravity because the solid density and the liquid density of the phase-change solid matters are different. After the solid matter falls off, the coolant can be introduced into the calandria 11 again, so as to form a cooling-heating periodic heat exchange process. In this embodiment, the solid phase of the phase change material is ice, and the liquid phase is water. The secondary refrigerant is glycol solution.
The heat exchanger that this embodiment provided has following advantage: (1) the first heat conduction part 121 and the third heat conduction part 123 have higher heat conduction coefficients, so that the heat exchange area can be effectively increased, and the heat exchange efficiency is improved; (2) the second heat conducting part 122 and the fourth heat conducting part 124 have lower heat conducting coefficients, and the second heat conducting part 122 and the fourth heat conducting part 124 have longitudinal and transverse isolation functions, so that the phase change solid substances on two sides of the calandria 12 are separated under the cooling-releasing working condition, a cylindrical solid block is avoided being formed, the phase change solid substances are prevented from completely wrapping the calandria 11, the time for separating the phase change solid substances under the heating working condition is greatly shortened, the input heat is reduced, and the cooling-releasing quantity in the cooling-heating period is improved; (3) because the phase-change solid substance on the calandria 11 can be removed quickly, the thermal resistance formed by the phase-change solid substance can be limited to a lower value, thereby greatly improving the cold-releasing and heat-exchanging efficiency of the heat exchanger and greatly shortening the cold-releasing time; (4) the heat conductivity coefficient of the calandria 11 is higher, so that the heat exchange efficiency of the heat exchanger 1 can be improved, and the cold release rate under the cold release working condition is accelerated; (5) the volume of the heat exchanger 1 can be effectively reduced and the manufacturing cost of the equipment can be reduced due to the improvement of the cooling and heat exchange efficiency.
The heat exchanger provided by the implementation is based on the large guidance of energy efficient utilization, energy conservation, environmental protection and emission reduction, and is oriented to the industry requirement of novel energy-saving technology application, and the industrial requirement with the efficient heat exchange engineering with phase change as the final target can meet the refrigeration requirement of a large central air conditioner, the centralized heat supply in winter in the north, the logistics cold supply chain, the large heat storage and cold storage and the like can be effectively utilized, and the economic benefit is improved.
Alternatively, the first heat conduction portion 121 and the third heat conduction portion 123 are integrally formed with the row tube 11, or both the first heat conduction portion 121 and the third heat conduction portion 123 are welded to the row tube 11.
Optionally, the second heat conduction part 122 is adhesively connected to the top of the first heat conduction part 121. The fourth heat conduction portion 124 is bonded to the top of the third heat conduction portion 123.
In this embodiment, the first fins are symmetrically disposed on the upper and lower sides of the row tube 11, the second fins are symmetrically disposed on the left and right sides of the row tube 11, and the second fins are connected to the first fins on the upper and lower sides of the row tube 11. The first fins on the upper side and the lower side of the calandria 11 divide the phase-change solid matter on the left side and the right side of the calandria 11 into semi-circular cylindrical shapes, and the second fins cut off the semi-circular cylindrical phase-change solid matter along the axial direction of the calandria 11.
Further, a plurality of second fins are arranged at intervals along the axis of the bank tube 11. Through the cooperation of a plurality of second fins, not only can increase heat transfer area, can cut into a plurality of short semicircle ring cylindricality with the phase transition solid matter of semicircle ring cylindricality moreover.
In the present embodiment, the first fin 12 has a rectangular shape. Further, the length of the rectangle is equal to the length of the gauntlet 11. Of course, in other embodiments, the first fin 12 may have other shapes, such as a rectangle, a trapezoid, etc., without limitation.
In this embodiment, the second fin includes the arc segment and connects the straightway at arc segment both ends, and wherein the arc segment is laminated with the outer wall of calandria 11, and the straightway is laminated with the first fin of calandria 11 upper and lower both sides respectively.
Optionally, the thermal conductivity of the gauntlet 11 is 5-500W/(m.K). The heat conductivity coefficient of the calandria 11 is high, which is beneficial to improving the heat exchange efficiency of the heat exchanger and accelerating the cooling rate under the cooling working condition.
Alternatively, the gauntlet 11 is made of copper, aluminum or stainless steel material. Specifically, in the present embodiment, the gauntlet tube 2 is made of a stainless steel material.
Alternatively, the first heat-transfer portion 121 and the third heat-transfer portion 123 have a thermal conductivity of 5 to 500W/(m · K). The heat conductivity coefficient of the first heat conduction part 121 and the third heat conduction part 123 is high, the heat exchange area can be effectively increased, and the heat exchange efficiency is improved.
Alternatively, the second heat conduction portion 122 and the fourth heat conduction portion 124 have a thermal conductivity of 0.01 to 0.3W/(m.K). The second heat conduction part 122 and the fourth heat conduction part 124 have lower heat conduction coefficients, which is beneficial to preventing the phase change solid substances on both sides of the calandria 11 from crossing the top of the second heat conduction part 122 and the fourth heat conduction part 124 to be connected into a whole, thereby playing an isolation role and shortening the time for separating the phase change solid substances under the ice-removing working condition.
Alternatively, the first and third heat conduction parts 121 and 123 are made of a copper, aluminum, or stainless steel material. Specifically, in the present embodiment, the first heat conduction portion 121 and the third heat conduction portion 123 are each made of a stainless steel material.
Alternatively, the second heat conduction portion 122 and the fourth heat conduction portion 124 are made of plastic or rubber. Such as polyethylene, polypropylene, polyvinyl chloride or polytetrafluoroethylene, etc. Specifically, in the present embodiment, the second heat conduction portion 122 and the fourth heat conduction portion 124 are each made of polyethylene.
Specifically, the second end of the discharge tube 11 is provided with an inlet/outlet 15, and the coolant and the heat-transfer agent can enter the discharge tube 1 through the inlet/outlet 15 or be discharged from the discharge tube 1.
Further, at least two sets of heat exchange assemblies are arranged at intervals, the heat exchanger 1 further comprises a connecting pipe 13 and an insulating layer 14, the first ends of the two adjacent calandria 11 are communicated through the connecting pipe 13, the insulating layer 14 wraps the connecting pipe 13, and the heat conductivity coefficient of the insulating layer 14 is smaller than that of the calandria 11. In order to prevent the phase change solid matter, i.e. ice, from forming an annular ice layer at the connecting pipe 13, which is not beneficial to quick falling, the connecting pipe 13 is wrapped with an insulating layer 14 with a low thermal conductivity coefficient. In this embodiment, the rack of gauntlets is also wrapped with an insulating layer 14.
Optionally, the plate surfaces of the first fins in at least two groups of heat exchange assemblies are in the same plane.
Optionally, the thermal conductivity of the insulating layer 14 is 0.01-0.3W/(m.K). The heat conductivity coefficient of the insulating layer 14 is low, so that the connecting pipe 13 is prevented from being wrapped by the phase change solid substance, and the falling speed of the phase change solid substance is increased.
Optionally, the insulation layer 14 is made of plastic or rubber. Such as expanded polyurethane or expanded polystyrene, etc.
Example two
As shown in fig. 4, the present embodiment provides a heat exchanger system, including the heat exchanger 1 provided in the first embodiment, further including a switching valve 5, and a low-temperature cold source and a high-temperature heat source 6, where the low-temperature cold source and the high-temperature heat source 6 are communicated with the discharging pipe 11 through the switching valve 5, so as to introduce a coolant or a heat carrier into the discharging pipe 11. Specifically, in the present embodiment, the switching valve 5 is a four-way valve. When the working condition of cooling is in, the low-temperature cold source is communicated with the calandria 11 by switching the switching valve 5, so as to introduce the secondary refrigerant into the calandria 11; when the ice is removed, the high-temperature heat source is communicated with the calandria 11 by switching the switching valve 5, so that the heat carrier is introduced into the calandria 11.
EXAMPLE III
As shown in fig. 5, the present embodiment provides a heat exchanger system, which includes the heat exchanger 1 provided in the first embodiment, and further includes a cold storage tank 2, a filter screen 3, a circulation assembly 4, a switching valve 5, and a low temperature cold source and a high temperature heat source 6. The cold storage tank 2 is filled with water and ice. The filter screen 3 is installed on the upper part of the cold storage tank 2 and is immersed in water. The circulation unit 4 includes a circulation line 41, a valve 42, a water pump 43, and a water distributor nozzle 44, an inlet 411 of the circulation line 41 is inserted into the water in the cold storage tank 2, the inlet 411 is positioned above the filter net 3, the valve 42 and the water pump 43 are both installed on the circulation line 41, an outlet 412 of the circulation line 41 is communicated with the water distributor nozzle 44, and the water distributor nozzle 44 is disposed at the lower portion of the cold storage tank 2. The heat exchanger 1 is installed in the cold storage tank 2, and the heat exchanger 1 is located between the filter screen 3 and the water distributor nozzle 44. The gauntlet 11 extends in a horizontal direction with the first fins in a vertical plane.
In order to improve the heat exchange efficiency, the heat exchanger system provided by the embodiment improves the flow rate of water in the cold storage tank 2 by adding the circulation component 4, wherein the water pump 43 sucks the unfrozen water on the upper part of the cold storage tank 2 into the circulation pipeline 41 from the inlet 411, pumps the water to the outlet 412 through the valve 42, and makes the water uniformly impact the surface of the heat exchanger 1 through the water distributor nozzle 44, so that the heat exchange efficiency is greatly improved, and meanwhile, the ice layer can be quickly dropped off under the ice removing working condition.
It should be noted that the structures and the operating principles of the switching valve 5, the low temperature cold source and the high temperature heat source 6 in this embodiment are the same as those in this embodiment, and are not described herein again.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (10)
1. A heat exchanger, characterized in that the heat exchanger (1) comprises:
the heat exchange assembly comprises a row pipe (11) and fins (12), secondary refrigerant or a heat carrier can be introduced into the row pipe (11), the fins (12) are arranged on the outer wall of the row pipe (11), and the height of the fins (12) extends along the radial direction of the row pipe (11);
the fins (12) comprise a first fin and a second fin, the plate surface of the first fin is parallel to the axis of the row of tubes (11), and the plate surface of the second fin is perpendicular to the axis of the row of tubes (11);
the first fin comprises a first heat conduction part (121) and a second heat conduction part (122) which are sequentially connected with the row of tubes (11), and the heat conductivity coefficient of the second heat conduction part (122) is smaller than that of the first heat conduction part (121) and that of the row of tubes (11);
the second fin comprises a third heat conduction part (123) and a fourth heat conduction part (124) which are sequentially connected with the rack pipe (11), and the heat conductivity coefficient of the fourth heat conduction part (124) is smaller than that of the third heat conduction part (123) and that of the rack pipe (11).
2. The heat exchanger according to claim 1, wherein at least two groups of the heat exchange assemblies are arranged at intervals, the heat exchanger (1) further comprises a connecting pipe (13) and an insulating layer (14), the first ends of two adjacent rows of tubes (11) are communicated through the connecting pipe (13), the insulating layer (14) wraps the connecting pipe (13), and the thermal conductivity of the insulating layer (14) is smaller than that of the rows of tubes (11).
3. The heat exchanger according to claim 1, characterized in that said first fins are symmetrically arranged on the upper and lower sides of said row of tubes (11), said second fins are symmetrically arranged on the left and right sides of said row of tubes (11), and said second fins are connected to said first fins on the upper and lower sides of said row of tubes (11).
4. The heat exchanger according to claim 1, characterized in that a plurality of said second fins are arranged at intervals along the axis of said row of tubes (11).
5. Heat exchanger according to claim 1, wherein the thermal conductivity of said gauntlet (11) is comprised between 5 and 500W/(m-K); and/or
The first heat conduction part (121) and the third heat conduction part (123) have a thermal conductivity of 5-500W/(m.K); and/or
The second heat conduction part (122) and the fourth heat conduction part (124) have a thermal conductivity of 0.01 to 0.3W/(m.K).
6. The heat exchanger according to claim 1, characterized in that the gauntlet (11) is made of copper, aluminum or stainless steel material; and/or
The first heat conduction part (121) is made of copper, aluminum or stainless steel material; and/or
The third heat conduction part (123) is made of copper, aluminum or stainless steel material; and/or
The second heat conduction portion (122) is made of plastic or rubber; and/or
The fourth heat conduction portion (124) is made of plastic or rubber.
7. The heat exchanger according to claim 2, characterized in that the thermal conductivity of the insulating layer (14) is 0.01-0.3W/(m-K).
8. The heat exchanger according to claim 2, characterized in that the insulating layer (14) is made of plastic or rubber.
9. A heat exchanger system, characterized in that it comprises a heat exchanger (1) according to any one of claims 1-8.
10. The heat exchanger system according to claim 9, further comprising a switching valve (5) and a low temperature heat source and a high temperature heat source (6), wherein the low temperature heat source and the high temperature heat source (6) are connected with the rack pipe (11) through the switching valve (5) to feed coolant or heat carrier to the rack pipe (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011036228.8A CN112082400A (en) | 2020-09-27 | 2020-09-27 | Heat exchanger and heat exchanger system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011036228.8A CN112082400A (en) | 2020-09-27 | 2020-09-27 | Heat exchanger and heat exchanger system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112082400A true CN112082400A (en) | 2020-12-15 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011036228.8A Pending CN112082400A (en) | 2020-09-27 | 2020-09-27 | Heat exchanger and heat exchanger system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112082400A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117109346A (en) * | 2023-10-25 | 2023-11-24 | 国网江苏省电力有限公司常州供电分公司 | Steam heat storage tank and heat preservation device thereof |
| CN117648778A (en) * | 2024-01-29 | 2024-03-05 | 地平线(天津)科学技术应用研究有限公司 | Optimal design method of single-tube multi-fin calandria evaporator |
-
2020
- 2020-09-27 CN CN202011036228.8A patent/CN112082400A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117109346A (en) * | 2023-10-25 | 2023-11-24 | 国网江苏省电力有限公司常州供电分公司 | Steam heat storage tank and heat preservation device thereof |
| CN117109346B (en) * | 2023-10-25 | 2024-01-02 | 国网江苏省电力有限公司常州供电分公司 | Steam heat storage tank and heat preservation device thereof |
| CN117648778A (en) * | 2024-01-29 | 2024-03-05 | 地平线(天津)科学技术应用研究有限公司 | Optimal design method of single-tube multi-fin calandria evaporator |
| CN117648778B (en) * | 2024-01-29 | 2024-04-23 | 地平线(天津)科学技术应用研究有限公司 | Optimal design method of single-tube multi-fin calandria evaporator |
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