CN112984874A - Evaporative condenser, manufacturing method thereof and air conditioning unit - Google Patents
Evaporative condenser, manufacturing method thereof and air conditioning unit Download PDFInfo
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- CN112984874A CN112984874A CN202110424962.XA CN202110424962A CN112984874A CN 112984874 A CN112984874 A CN 112984874A CN 202110424962 A CN202110424962 A CN 202110424962A CN 112984874 A CN112984874 A CN 112984874A
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 15
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 9
- 230000008569 process Effects 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 94
- 238000003466 welding Methods 0.000 claims description 40
- 230000007246 mechanism Effects 0.000 claims description 14
- 238000005057 refrigeration Methods 0.000 claims description 12
- 230000007480 spreading Effects 0.000 claims description 12
- 238000003892 spreading Methods 0.000 claims description 12
- 230000006835 compression Effects 0.000 claims description 10
- 238000007906 compression Methods 0.000 claims description 10
- 238000000465 moulding Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 238000007664 blowing Methods 0.000 claims description 2
- 239000003507 refrigerant Substances 0.000 description 9
- 238000010586 diagram Methods 0.000 description 7
- 238000009826 distribution Methods 0.000 description 6
- 239000012530 fluid Substances 0.000 description 6
- 239000007921 spray Substances 0.000 description 5
- 238000004891 communication Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 229910000679 solder Inorganic materials 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000009331 sowing Methods 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B39/00—Evaporators; Condensers
- F25B39/04—Condensers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
- F24F5/001—Compression cycle type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0046—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground
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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
- F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
- F28F3/08—Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning
- F28F3/086—Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning having one or more openings therein forming tubular heat-exchange passages
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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
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2339/00—Details of evaporators; Details of condensers
- F25B2339/04—Details of condensers
- F25B2339/041—Details of condensers of evaporative condensers
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Sustainable Energy (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The embodiment of the invention provides an evaporative condenser, a manufacturing method of the evaporative condenser and an air conditioning unit, and relates to the field of air conditioners. The evaporative condenser comprises a first inlet header, a first outlet header, a second inlet header, a second outlet header and a plurality of groups of heat exchange plate tubes; the heat exchange plate tube comprises a first plate, a second plate and a third plate, the second plate is positioned between the first plate and the third plate, the first plate is connected with the second plate and forms a first flow passage, the second plate is connected with the third plate and forms a second flow passage, and the first flow passage and the second flow passage are mutually separated by the second plate; the first flow passage has a first inlet connected to the first inlet header and a first outlet connected to the first outlet header; the second flow passage has a second inlet connected to the second inlet header and a second outlet connected to the second outlet header. The embodiment of the invention can improve the heat exchange performance of the heat exchanger, thereby prolonging the high-efficiency heat exchange process.
Description
Technical Field
The invention relates to the field of air conditioners, in particular to an evaporative condenser, a manufacturing method of the evaporative condenser and an air conditioning unit.
Background
The evaporative condensation technology has the characteristic of good energy conservation and is widely applied to the field of air conditioners. With the development of air conditioning requirements of data centers, in order to improve the operating energy efficiency all year round, energy-saving operation in more natural cold source modes (the natural cold source mode refers to an operating mode in which a compressor does not participate in refrigeration, that is, the compressor does not operate) is often required besides compression refrigeration operation.
In the prior art, the evaporative condenser can be combined with another heat exchange channel to realize a natural cold source mode, namely, the chilled water exchanges heat with the spray water and the air on the outer surface of the heat exchange channel. However, this technique has the following drawbacks: on one hand, the evaporative condenser has difficulty in realizing high energy efficiency in both a compression refrigeration mode and a natural cold source mode; on the other hand, the mode of adopting the outer surface of the coil pipe to directly contact spray water can bring difficulty to water distribution uniformity and also can cause the problem of easy scaling.
Disclosure of Invention
The invention aims to provide an evaporative condenser, a manufacturing method thereof and an air conditioning unit, which can improve the heat exchange performance of a heat exchanger, and comprises the steps of improving the efficiency of a refrigeration mode and a natural cold source mode of a conventional compressor, improving the problem of uniform water distribution on the outer surface of the evaporative condenser, and inhibiting the problem of scaling on the outer surface of the evaporative condenser, thereby prolonging the high-efficiency heat exchange process of the evaporative condenser.
The embodiment of the invention is realized by the following steps:
in a first aspect, the invention provides an evaporative condenser, which comprises a first inlet header, a first outlet header, a second inlet header, a second outlet header and a plurality of groups of heat exchange plate tubes, wherein an external channel is formed between two adjacent groups of heat exchange plate tubes;
the heat exchange plate tube comprises a first plate, a second plate and a third plate, the second plate is positioned between the first plate and the third plate, the first plate is connected with the second plate to form a first flow channel, the second plate is connected with the third plate to form a second flow channel, and the first flow channel and the second flow channel are mutually separated by the second plate;
the first flow passage having a first inlet connected to the first inlet header and a first outlet connected to the first outlet header;
the second flow passage has a second inlet connected to the second inlet header and a second outlet connected to the second outlet header.
In an alternative embodiment, the evaporator condenser further comprises a first inlet leg connected to the first inlet header and the first inlet port, respectively;
and/or the evaporator condenser further comprises a first outlet branch pipe which is respectively connected with the first outlet header and the first outlet;
and/or the evaporator condenser further comprises a second inlet branch pipe, and the second inlet branch pipe is respectively connected with the second inlet header and the second inlet;
and/or the evaporator condenser further comprises a second outlet branch pipe which is connected with the second outlet header and the second outlet respectively.
In an alternative embodiment, the first plate is connected to the second plate and encloses the first inlet leg at the first inlet; and/or the first plate is connected with the second plate and encloses the first outlet branch at the first outlet; and/or the second plate sheet is connected with the third plate sheet and encloses the second inlet branch pipe at the second inlet; and/or the second plate is connected with the third plate and surrounds the second outlet branch pipe at the second outlet.
In an alternative embodiment, the peripheries of the first plate and the second plate are sealed, and the internal flow channel is formed in the middle area through a first connecting point or a connecting line of the first plate and the second plate, wherein a bulge is formed at a non-connecting point position of the first plate and the second plate, and the bulge forms the first flow channel;
the peripheries of the second plate and the third plate are sealed, and the middle area forms the second flow channel through a second connection point or a connection line of the second plate and the third plate, wherein bulges are formed at the positions of non-connection points of the second plate and the third plate, and the bulges form the second flow channel.
In an alternative embodiment, the solder connection points are arranged in an array and satisfy the following relationship:
in a first direction: xi ═ a ═ i2+ b + i + c, where Xi represents the distance between the ith welding point and the first welding point in the first direction, i is the dot connection dot matrix number in the first direction, and a, b and c are constants;
in a second direction: yj ═ d × j2+ e + j + f, where Yj represents the distance between the jth welding point and the first welding point in the second direction, j is a positive integer of the dot-shaped connection lattice in the second direction, and d, e, and f are constants.
In an alternative embodiment, the first plate and the second plate have a plurality of first welding points, the second plate and the third plate have a plurality of second welding points, the plurality of first welding points and the plurality of second welding points at least partially coincide, and/or the plurality of first welding points and the plurality of second welding points are at least partially offset.
In an alternative embodiment, the first flow path comprises a first flow path and at least one first branch, the first flow path not communicating with the first branch;
the second flow passage comprises a second flow path and at least one second branch, the second flow path is not communicated with the second branch, the second branch is communicated with the first flow path, and the first branch is communicated with the second flow path.
In an optional embodiment, the evaporative condenser further comprises a water spreader, a water pan, a water pump and a fan, wherein the water spreader faces the heat exchange plate pipe and is used for spreading water to the heat exchange plate pipe; the evaporative condenser also comprises a water receiving tray and a water pump, the water receiving tray is arranged below the heat exchange plate pipe, and the water pump is used for conveying water in the water receiving tray to the water spreader; the fan is used for blowing air to the external channel.
In a second aspect, the present invention provides a method of manufacturing an evaporative condenser, for manufacturing an evaporative condenser as set forth in any one of the preceding embodiments, the method comprising:
pressing the first plate, the second plate and the third plate into a preset shape;
sequentially assembling and molding the first plate, the second plate and the third plate, and sequentially welding or bonding the first plate, the second plate and the third plate to form a first flow channel between the first plate and the second plate and a second flow channel between the second plate and the third plate so as to manufacture a heat exchange plate pipe;
assembling the first inlet header, the first outlet header, the second inlet header and the second outlet header to the plurality of groups of the heat exchange plate tubes placed side by side, wherein the first inlet header is communicated with the first inlet of the first flow channel, the first outlet header is communicated with the first outlet of the first flow channel, the second inlet header is communicated with the second inlet of the second flow channel, and the second outlet header is communicated with the second outlet of the second flow channel, and welding the first inlet header, the first outlet header, the second inlet header and the second outlet header to the heat exchange plate tubes.
In a third aspect, the present invention provides an air conditioning unit, comprising a compressor, a throttling mechanism, an evaporator, a fan, a water spreading device, a water pump, a water pan and an evaporative condenser as described in any one of the foregoing embodiments;
the air outlet of the compressor is connected with the first inlet manifold, the first outlet manifold is connected with one end of the throttling mechanism, the other end of the throttling mechanism is connected with one end of the evaporator, and the other end of the evaporator is connected with an air suction port of the compressor;
the second inlet header is connected with the return water at the use side, and the second outlet header is connected with the water supply at the use side;
the water receiving tray is arranged below the condenser and connected with the water pump inlet, the water pump outlet is connected with the water sowing device, and the water sowing device is used for spraying water on the outer surface of the heat exchange plate pipe.
In an optional embodiment, the air conditioner further includes a first valve and a second valve, the first valve is disposed on a pipe between the second inlet manifold and the use side, and is used for controlling the use side to be communicated with or closed from the second inlet manifold, one end of the evaporator is further connected to the second inlet manifold, the other end of the evaporator is further connected to the second outlet manifold, and a pipe between the evaporator and the second inlet manifold is provided with the second valve.
In an alternative embodiment, the air conditioning unit includes a compression refrigeration mode in which the first valve is open and the second valve is closed and a natural cold source mode;
and in the process of switching from the compression refrigeration mode to the natural cold source mode, controlling the throttling mechanism to be closed, controlling the compressor to be closed after preset time, or controlling the first valve to be closed according to the condition that the value detected by the low-pressure sensor is lower than a set pressure value, or the action of a low-pressure switch.
The embodiment of the invention has the beneficial effects that: according to the embodiment of the invention, the first plate, the second plate and the third plate form two internal flow channels, so that the heat exchange plate tube is formed, internal multi-element medium heat exchange can be realized, the external channel formed between the heat exchange plate tube and the heat exchange plate tube can be subjected to forced ventilation by using air after water is sprayed on the external channel, and water on the outer surface of the heat exchange plate tube is gasified, so that the heat of the medium in the internal first flow channel and the internal second flow channel is taken away, and efficient heat exchange is realized. And two media positioned in the first flow passage and the second flow passage can exchange heat, so that the heat exchange of the quaternary medium is realized, the heat exchange modes of various purposes can be realized, meanwhile, various different heat exchange modes can be conveniently switched, and the plate structure is favorable for the arrangement of external water distribution and air passages.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of an evaporative condenser according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the evaporative condenser of FIG. 1 from another perspective;
FIG. 3 is a schematic structural diagram of a heat exchanger plate tube according to an embodiment of the present invention;
FIG. 4 is a schematic view of another structure of a heat exchanger plate tube according to an embodiment of the present invention;
FIG. 5 is a schematic view of another structure of a heat exchanger plate tube according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a relationship between a first flow channel and a second flow channel provided in an embodiment of the present invention;
FIG. 7 is a schematic diagram of a solder connection point array configuration according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of an evaporative condenser, a water spreading device, a fan and the like provided in the embodiment of the present invention;
fig. 9 is a schematic structural diagram of an air conditioning unit according to an embodiment of the present invention.
Icon: 10-an air conditioning unit; 100-an evaporative condenser; 110-a first intake manifold; 112-a first outlet header; 113-a second intake manifold; 114-a second outlet header; 120-heat exchanger plate tubes; 121-a first plate; 122-a second plate; 123-a third plate; 124-a first flow channel; 125-a second flow channel; 130-an external channel; 140-a first intake manifold; 142-a first outlet leg; 143-a second intake manifold; 144-a second outlet leg; 200-a compressor; 210-a throttle mechanism; 220-an evaporator; 230-a fan; 240-a water spreading device; 250-a water pump; 260-a water-receiving tray; 270-a first valve; 280-second valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the 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.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
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 or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; 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.
Referring to fig. 1 to 3, in the embodiment of the present invention, an evaporative condenser 100 includes a first header 110, a first header 112, a second header 113, a second header 114, and a plurality of sets of heat exchange plate tubes 120, wherein an external channel 130 is formed between two adjacent sets of heat exchange plate tubes 120; the heat exchange plate tube 120 comprises a first plate 121, a second plate 122 and a third plate 123, the second plate 122 is located between the first plate 121 and the third plate 123, the first plate 121 is connected with the second plate 122 and forms a first flow channel 124, the second plate 122 is connected with the third plate 123 and forms a second flow channel 125, and the first flow channel 124 and the second flow channel 125 are separated from each other by the second plate 122; the first flow passage 124 has a first inlet connected to the first inlet header 110 and a first outlet connected to the first outlet header 112; the second flow passage 125 has a second inlet connected to the second inlet header 113 and a second outlet connected to the second outlet header 114.
In the embodiment of the invention, two internal flow channels are formed by the first plate 121, the second plate 122 and the third plate 123, so that the heat exchange plate tube 120 is formed, and internal multi-medium heat exchange can be realized, and the external channel 130 formed between the heat exchange plate tube 120 and the heat exchange plate tube 120 can be sprayed with water through the external channel 130, and then forced ventilation is performed by using air, so that water on the outer surface of the heat exchange plate tube 120 is gasified, and thus the heat of media in the internal first flow channel 124 and the internal second flow channel 125 is taken away, and efficient heat exchange is realized. The two media in the first flow channel 124 and the second flow channel 125 can exchange heat, so that the heat exchange of the quaternary medium is realized, and the heat exchange mode with multiple purposes can be used, for example, the medium in the first flow channel 124 is used as a cooling main body, the medium in the second flow channel 125, the external channel 130 and the like are used as auxiliary cooling and the like; meanwhile, various heat exchange modes can be conveniently switched, and the plate structure is favorable for arrangement of external water distribution and air ducts.
In an alternative embodiment, the evaporative condenser 100 further comprises a first inlet branch 140, the first inlet branch 140 being connected to the first inlet header 110 and the first inlet, respectively; and/or, the evaporative condenser 100 further includes a first outlet branch 142, the first outlet branch 142 is connected with the first outlet header 112 and the first outlet respectively; and/or, the evaporative condenser 100 further includes a second inlet branch pipe 143, the second inlet branch pipe 143 being connected to the second inlet header 113 and the second inlet, respectively; and/or, the evaporative condenser 100 further comprises a second outlet pipe 144, the second outlet pipe 144 being connected to the second outlet header 114 and the second outlet, respectively.
The embodiment of the present invention is not particularly required or limited with respect to the specific forming manner of the first branch inlet pipe 140, the first branch outlet pipe 142, the second branch inlet pipe 143 and the second branch outlet pipe 144. Optionally, the first plate 121 is connected to the second plate 122 and encloses a first inlet leg 140 at a first inlet; and/or the first plate 121 is connected with the second plate 122 and encloses a first branch-out pipe 142 at the first outlet; and/or the second plate 122 is connected with the third plate 123 and encloses a second branch inlet 143 at a second inlet; and/or the second plate 122 is connected with the third plate 123 and encloses a second outlet branch 144 at the second outlet.
Referring to fig. 3 to 5, in an alternative embodiment, the first plate 121 and the second plate 122 have a plurality of first welding points, the second plate 122 and the third plate 123 have a plurality of second welding points, the plurality of first welding points and the plurality of second welding points at least partially overlap, and/or the plurality of first welding points and the plurality of second welding points are at least partially arranged in a staggered manner. In fig. 3, the first weld point is substantially not coincident with the second weld point, only at the end points at both ends. The first welding point is overlapped with the second welding point; in fig. 4, the first welding point and the second welding point are not overlapped, that is, the first welding point and the second welding point are arranged in a staggered manner; in fig. 5, substantially all of the first weld points coincide with the second weld points.
Referring to fig. 6, in an alternative embodiment, the first flow path 124 includes a first flow path and at least one first branch, and the first flow path is not communicated with the first branch; the second flow channel 125 includes a second flow path and at least one second branch, the second flow path is not communicated with the second branch, and the second branch is communicated with the first flow path, and the first branch is communicated with the second flow path.
Note that, for example, as shown in fig. 6, ABC constitutes a first flow channel 124, a ' B ' C ' constitutes a second flow channel 125, in the first flow channel 124, B is not communicated with a and C, B ' is not communicated with a ' and C ', AB ' C is communicated, a ' BC ' is communicated, that is, B is the first branch, and AC is the first flow channel; b ' is a second branch, and A ' C ' is a second flow path. Of course, without being limited thereto, in the embodiment of the present invention, the first flow channel 124 and the second flow channel 125 may include different numbers of first branches, second branches, and different numbers of first flow paths and second flow paths. In the embodiment of the present invention, two fluids are respectively referred to as a first fluid and a second fluid, where the first fluid may flow from a channel (a first flow path) between the first plate 121 and the second plate 122 to a channel (a second branch) between the second plate 122 and the third plate 123, and the second fluid may flow from the channel (a second flow path) between the second plate 122 and the third plate 123 to the channel (a first branch) between the first plate 121 and the second plate 122, so as to achieve a better heat exchange effect.
In an alternative embodiment, the peripheries of the first plate 121 and the second plate 122 are sealed, and an internal flow channel is formed in the middle region through a first connection point or a connection line of the first plate 121 and the second plate 122, wherein a bulge is formed at a non-connection point position of the first plate 121 and the second plate 122, and the bulge forms the first flow channel 124; the peripheries of the second plate 122 and the third plate 123 are sealed, and the middle area forms a second flow channel 125 through a second connection point or a connection line of the second plate 122 and the third plate 123, wherein a bulge is formed at the position of the non-connection point of the second plate 122 and the third plate 123, and the bulge forms the second flow channel 125.
Referring to fig. 7, alternatively, the connection points and the connection lines may be formed by welding, for example, for the first connection point, the first plate 121 and the second plate 122 may be welded together, and the first connection point and the connection lines are formed on the surface of the first plate 121, and the non-welded portion is formed as an internal flow channel between the first plate 121 and the second plate 122 for passing a fluid such as a refrigerant.
Further, the solder connection points are arranged in an array and satisfy the following relationship (unit is mm):
in a first direction: xi ═ a ═ i2+ b + i + c, where Xi represents the distance between the ith welding point and the first welding point in the first direction, i is the dot connection dot matrix number in the first direction, and a, b and c are constants; such as X1 and X2 in fig. 7.
In a second direction: yj ═ d × j2+ e + j + f, where Yj represents the distance between the jth welding point and the first welding point in the second direction, j is a positive integer of the dot-shaped connection lattice in the second direction, and d, e, and f are constants. Such as Y1 and Y2 in fig. 7.
It should be noted that the present embodiment does not specifically require parameters in the arrangement relation in the first direction and the second direction, and for example, if a is 2.25, b is 26, and c is 1.75 in the first direction, the above formula may be converted into: xi＝2.25×i2+26 × i + 1.75; in the second direction, if d is 4.25, e is 11, and f is 14, the above formula can be converted into: y isj＝4.25×j2+26×j+1.75。
Referring to fig. 8, in an alternative embodiment, the evaporative condenser 100 further includes a water spreader facing the heat exchange plate tubes 120 for spreading water to the heat exchange plate tubes 120, a water receiving tray 260, a water pump 250 and a fan 230; the evaporative condenser 100 further comprises a water pan 260 and a water pump 250, wherein the water pan 260 is arranged below the heat exchange plate tube 120, and the water pump 250 is used for conveying water in the water pan 260 to the water spreader; the fan 230 is used to blow air out of the outer passage 130.
The present invention provides a method of manufacturing an evaporative condenser 100 for manufacturing an evaporative condenser 100 as in any one of the preceding embodiments, the method comprising the steps of:
step S1: pressing the first plate piece 121, the second plate piece 122 and the third plate piece 123 into a preset shape;
step S2: sequentially assembling and molding the first plate 121, the second plate 122 and the third plate 123, and sequentially welding or bonding the first plate 121, the second plate 122 and the third plate 123 to form the first flow channel 124 between the first plate 121 and the second plate 122, and form the second flow channel 125 between the second plate 122 and the third plate 123, thereby manufacturing the heat exchange plate tube 120;
step S3: the first header 110, the first header 112, the second header 113 and the second header 114 are assembled to a plurality of sets of the heat exchanger plates 120 placed side by side, and the first header 110, the first header 112, the second header 113 and the second header 114 are welded to the heat exchanger plates 120, wherein the first header 110 is in communication with the first inlet of the first flow passage 124, the first header 112 is in communication with the first outlet of the first flow passage 124, the second header 113 is in communication with the second inlet of the second flow passage 125, and the second header 114 is in communication with the second outlet of the second flow passage 125.
Referring to fig. 9, the present invention provides an air conditioning unit 10, which includes a compressor 200, a throttling mechanism 210, an evaporator 220, a fan 230, a water spreading device 240, a water pump 250, a water pan 260 and an evaporative condenser 100 according to any of the foregoing embodiments; the exhaust port of the compressor 200 is connected with the first inlet header 110, the first outlet header 112 is connected with one end of the throttling mechanism 210, the other end of the throttling mechanism 210 is connected with one end of the evaporator 220, and the other end of the evaporator 220 is connected with the suction port of the compressor 200; the second inlet header 113 is connected to the return water at the use side, and the second outlet header 114 is connected to the supply water at the use side; the water receiving tray 260 is arranged below the condenser and connected with an inlet of the water pump 250, an outlet of the water pump 250 is connected with the water spreading device 240, and the water spreading device 240 is used for spraying water on the outer surface of the heat exchange plate pipe 120.
In an alternative embodiment, the air conditioner further includes a first valve 270 and a second valve 280, the first valve 270 is disposed on a pipe between the second inlet header 113 and the use side for controlling the use side to be communicated with or closed off from the second inlet header 113, one end of the evaporator 220 is further connected to the second inlet header 113, the other end is further connected to the second outlet header 114, and the second valve 280 is disposed on a pipe between the evaporator 220 and the second inlet header 113.
In an alternative embodiment, the air conditioning unit 10 includes a compression refrigeration mode in which the first valve 270 is open and the second valve 280 is closed; in the process of switching from the compression refrigeration mode to the natural cold source mode, the throttling mechanism 210 is controlled to be closed, and after a preset time, or when the value detected by the low-pressure sensor is lower than a set pressure value, or the low-pressure switch acts, the compressor 200 is controlled to be closed, and then the first valve 270 is controlled to be closed.
Referring to fig. 1 to 9, in the embodiment of the present invention, when the compression refrigeration mode is operated, the compressor 200 discharges a high-temperature gaseous refrigerant into the evaporative condenser 100, the refrigerant flows into the evaporator 220 through the throttle mechanism 210 after being condensed, the refrigerant of the evaporator 220 absorbs heat of chilled water, the chilled water is cooled and sent to a use side, the refrigerant is heated and gasified, and flows back to the air suction port of the compressor 200, water is sprayed on the outer surface of the evaporative condenser 100, and air flows through the outer channel of the evaporative condenser 100, so that the water is gasified to take away condensation heat of the refrigerant inside the evaporative condenser 100. When the natural cold source mode is operated, the chilled water is directly led into the other circulation channel of the evaporative condenser 100, so that the heat exchange efficiency of the chilled water and the external spray water is improved, the operation time of the natural cold source is prolonged, and the aim of higher overall operation efficiency is fulfilled. The plate-pipe structure enables water distribution to form a continuous water film from top to bottom, improves the heat exchange efficiency and is beneficial to scale prevention. According to the invention, by arranging the plate pipe structure, under the condition that the evaporative condenser 100 realizes double-efficient heat exchange of the refrigerant and the chilled water, the internal circulation channel is adjusted by the welding point lines, so that the internal heat exchange is enhanced, the internal heat exchange efficiency is improved, and meanwhile, the lead-in performance between 3 plates is improved by the special staggered design of the welding points, so that the heat exchange effect with spray water is improved. The heat exchange effect of the chilled water in the plate pipe in the natural cold source mode is improved by the heat pipe heat exchange of the refrigerant in the inner channel of the refrigerant of the evaporative condenser 100. Meanwhile, the heat exchange efficiency of the spray water on the two sides of the outer channel can be more fully utilized through the staggered flowing of the circulating channels. The embodiment of the invention can improve the heat exchange efficiency of the evaporative condenser 100 in a compression refrigeration mode and a natural cold source mode, improve the water distribution problem of the outer surface of the evaporative condenser, improve the scaling problem of the outer surface of the evaporative condenser and prolong the high-efficiency heat exchange time of the evaporative condenser.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An evaporative condenser, comprising a first header (110), a first header (112), a second header (113), a second header (114) and a plurality of groups of heat exchange plate tubes (120), wherein an external channel (130) is formed between two adjacent groups of heat exchange plate tubes (120);
the heat exchange plate tube (120) comprises a first plate (121), a second plate (122) and a third plate (123), the second plate (122) is positioned between the first plate (121) and the third plate (123), the first plate (121) is connected with the second plate (122) to form a first flow channel (124), the second plate (122) is connected with the third plate (123) to form a second flow channel (125), and the first flow channel (124) and the second flow channel (125) are mutually separated by the second plate (122);
the first flow passage (124) having a first inlet connected to the first inlet header (110) and a first outlet connected to the first outlet header (112);
the second flow passage (125) has a second inlet connected to the second inlet header (113) and a second outlet connected to the second outlet header (114).
2. The evaporative condenser, as set forth in claim 1, wherein the evaporative condenser (100) further comprises a first inlet branch pipe (140), the first inlet branch pipe (140) being connected with the first inlet header (110) and the first inlet, respectively;
and/or, the evaporative condenser (100) further comprises a first outlet branch (142), the first outlet branch (142) being connected with the first outlet header (112) and the first outlet respectively;
and/or, the evaporative condenser (100) further comprises a second inlet branch pipe (143), the second inlet branch pipe (143) is respectively connected with the second inlet header (113) and the second inlet;
and/or the evaporative condenser (100) further comprises a second outlet pipe (144), and the second outlet pipe (144) is respectively connected with the second outlet header (114) and the second outlet.
3. Evaporative condenser, according to claim 2, characterized in that said first plate (121) is connected to said second plate (122) and encloses said first inlet leg (140) at said first inlet; and/or the first plate (121) is connected with the second plate (122) and encloses the first outlet branch (142) at the first outlet; and/or the second plate (122) is connected with the third plate (123) and encloses the second inlet branch (143) at the second inlet; and/or the second plate (122) is connected with the third plate (123) and encloses the second outlet pipe (144) at the second outlet.
4. The evaporative condenser, as recited in claim 1, wherein the first plate (121) and the second plate (122) are sealed at their peripheries, and the first flow channel (124) is formed in the middle area by the first connection point or connection line of the first plate (121) and the second plate (122), wherein the first plate (121) and the second plate (122) form a bulge at the position of the non-connection point, and the bulge forms the first flow channel (124);
the periphery of the second plate (122) and the periphery of the third plate (123) are sealed, the second flow channel (125) is formed in the middle area through a second connection point or a connection line of the second plate (122) and the third plate (123), bulges are formed on the second plate (122) and the third plate (123) at the position of the non-connection point, and the bulges form the second flow channel (125).
5. Evaporative condenser according to claim 4, wherein the first sheet (121) and the second sheet (122) have a plurality of first welding points, the second sheet (122) and the third sheet (123) have a plurality of second welding points, the plurality of first welding points and the plurality of second welding points at least partially coincide and/or the plurality of first welding points and the plurality of second welding points are at least partially offset.
6. The evaporative condenser according to claim 1, wherein the first flow channel (124) comprises a first flow path and at least one first branch, the first flow path not communicating with the first branch;
the second flow channel (125) includes a second flow path and at least one second branch, the second flow path is not communicated with the second branch, the second branch is communicated with the first flow path, and the first branch is communicated with the second flow path.
7. The evaporative condenser according to any one of claims 1 to 6, wherein the evaporative condenser (100) further comprises a water spreader, a water receiving tray (260), a water pump (250) and a fan (230), the water spreader facing the heat exchanger plate tubes (120) for spreading water to the heat exchanger plate tubes (120); the evaporative condenser (100) further comprises a water receiving tray (260) and a water pump (250), the water receiving tray (260) is arranged below the heat exchange plate pipe (120), and the water pump (250) is used for conveying water in the water receiving tray (260) to the water spreader; the fan (230) is used for blowing air out of the external channel (130).
8. A method of manufacturing an evaporative condenser (100) for manufacturing an evaporative condenser according to any one of claims 1-7, the method comprising:
pressing the first plate (121), the second plate (122) and the third plate (123) into a preset shape;
sequentially assembling and molding the first plate (121), the second plate (122) and the third plate (123), and sequentially welding or bonding to form the first flow channel (124) between the first plate (121) and the second plate (122) and form the second flow channel (125) between the second plate (122) and the third plate (123) so as to manufacture the heat exchange plate tube (120);
assembling the first inlet header (110), the first outlet header (112), the second inlet header (113) and the second outlet header (114) to a plurality of groups of the heat exchanger plate tubes (120) placed side by side, and welding the first inlet header (110), the first outlet header (112), the second inlet header (113) and the second outlet header (114) to the heat exchanger plate tubes (120), wherein the first inlet header (110) communicates with a first inlet of the first flow passage (124), the first outlet header (112) communicates with a first outlet of the first flow passage (124), the second inlet header (113) communicates with a second inlet of the second flow passage (125), and the second outlet header (114) communicates with a second outlet of the second flow passage (125).
9. Air conditioning assembly (10), comprising a compressor (200), a throttling mechanism (210), an evaporator (220), a fan (230), a water spreading device (240), a water pump (250), a water pan (260), a first valve (270), a second valve (280) and an evaporative condenser (100) according to any of claims 1-7;
the air outlet of the compressor (200) is connected with the first inlet header (110), the first outlet header (112) is connected with one end of the throttling mechanism (210), the other end of the throttling mechanism (210) is connected with one end of the evaporator (220), and the other end of the evaporator (220) is connected with the air suction port of the compressor (200);
the second inlet header (113) is connected with the backwater of the use side, and the second outlet header (114) is connected with the water supply of the use side;
the water receiving tray (260) is arranged below the condenser and is connected with an inlet of the water pump (250), an outlet of the water pump (250) is connected with the water spreading device (240), and the water spreading device (240) is used for spraying water on the outer surface of the heat exchange plate pipe (120);
the first valve (270) is arranged on the pipeline between the second inlet manifold (113) and the use side and is used for controlling the use side to be communicated with or closed off from the second inlet manifold (113), one end of the evaporator (220) is also connected with the second inlet manifold (113), the other end of the evaporator is also connected with the second outlet manifold (114), and the second valve (280) is arranged on the pipeline between the evaporator (220) and the second inlet manifold (113).
10. The air conditioning assembly (10) of claim 9 wherein said air conditioning assembly (10) includes a compression refrigeration mode wherein said first valve (270) is open and said second valve (280) is closed and a natural heat sink mode;
in the process of switching from the compression refrigeration mode to the natural cold source mode, the throttling mechanism (210) is controlled to be closed, after preset time, or when the value detected by the low-pressure sensing is lower than a set pressure value, or a low-pressure switch acts, the compressor (200) is controlled to be closed, and then the first valve (270) is controlled to be closed.
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| CN202110424962.XA CN112984874B (en) | 2021-04-20 | 2021-04-20 | Evaporative condenser, manufacturing method thereof and air conditioning unit |
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| CN202110424962.XA CN112984874B (en) | 2021-04-20 | 2021-04-20 | Evaporative condenser, manufacturing method thereof and air conditioning unit |
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| CN112984874B (en) | 2024-09-06 |
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