WO2015158186A1

WO2015158186A1 - Composite-structure wet-film surface air cooler

Info

Publication number: WO2015158186A1
Application number: PCT/CN2015/073609
Authority: WO
Inventors: 童军
Original assignee: 童军
Priority date: 2014-04-17
Filing date: 2015-03-04
Publication date: 2015-10-22
Also published as: CN104197588B; CN104197588A; CN103940154A

Abstract

A composite-structure wet-film surface air cooler, comprising a plurality of fins (1) parallelly arranged at intervals, and a plurality of heat exchanging pipes (2) passing through the fins (1); a wet film layer (3) is located between two fins (1) to form a "sandwich" structure; and at least one water absorbing belt (4) for introducing water to the wet film layer (3) extends out of the wet film layer (3), or a water dripping device (6) is disposed on the upper part of the wet film layer (3). The composite-structure wet-film surface air cooler on one hand improves the heat dissipation efficiency and coefficient of performance (COP) of condensate water used for the surface air cooler of an air conditioner to reduce air exhaust pressure when the air conditioner cools air, and on the other hand, by being used with anti-freeze, keeps the surface air cooler of the air conditioner from frosting when the air conditioner heats the air in winter.

Description

Composite structure wet film cooler

Technical field

The invention relates to the technical field of air conditioners, in particular to a composite structure wet film air cooler.

Background technique

The cooling methods of the existing air conditioners are divided into air cooling and water cooling.

The air-cooled air conditioner emits heat directly from the air through the outdoor heat-dissipating coil and the fan. The heat-dissipating coil is generally called a surface air cooler (referred to as a surface cooler), and its structure is a plurality of sets of copper tube arrays, a refrigerant flows in the copper tubes, and dense heat-dissipating aluminum fins are connected outside the copper tubes. The air-cooled air conditioner can be cooled in summer and heated in winter to achieve dual use. In the summer cooling, when the air cooler is used for heat dissipation, it is generally called a condenser; when the air cooler is used to absorb heat in the air during heating in winter, the air cooler is generally called an evaporator. Mostly used for household, small or large heat pump units. Since the air is driven by the fan completely, the refrigerant in the air conditioner exchanges heat with the air outside the surface cooler, so that the cooling efficiency is generally only about COP3.2.

The water-cooled air conditioner adds a cooling water system, and the air conditioner first exchanges heat with the cooling water, and then dissipates heat to the air through the cooling tower. Water-cooled air conditioners are generally large-scale summer single-refrigeration air-conditioning units (screws, centrifugal units). The COP of the water-cooled air-conditioning unit is generally above 5.0, but the water-cooled air conditioner has a large volume, high cost and complicated structure.

The existing surface cooler structure is composed of a ribbed tube (the air conditioner generally adopts a copper tube), a header box and a guard plate. The fin tube has a cold (hot) refrigerant flowing therein, and the fin tube has fins outside, and the tube is expanded by the rib tube. Works closely with the fins. Among them, the rib tube and the fin are the main heat exchange components. Common fin forms are wound, creased, rolled and sleeved. The heat transfer surface structure of the air cooler has a plate type (such as spiral plate, plate and shell, corrugated plate, plate and fin type, etc.) and tubular type (such as tube type, casing type, serpentine tube type, and fin tube type). Etc.), air conditioners are commonly used in finned tubes, which can be divided into flat fins, corrugated fins, punched fins and louver fins to ensure the disturbance of air heat exchange, making it turbulent. The heat exchange efficiency is greatly improved.

In order to make the air-cooled air conditioner more energy-efficient, at present, the energy consumption ratio COP of the air-cooled air conditioner is improved mainly by recovering condensed water or tap water spray (fog). By recovering the condensed water generated by the indoor unit during air-conditioning cooling, the condensed water (or tap water) is directly evaporated on the surface cooler (or nearby) in different ways, and the latent heat absorbed by the evaporation of the water is used to additionally enhance the heat dissipation of the air conditioner air cooler. The effect is to reduce the exhaust pressure of the compressor during air conditioning and cooling, thereby reducing the energy consumption of the air conditioner. However, the condensate of air conditioners is generally drained directly and is not recycled.

The prior art uses condensed water mainly in the following ways:

(1) The condensed water is atomized by an ultrasonic atomizer and then blown on the surface of the surface cooler with the fan. But the ultrasonic atomizer is extremely fragile and made The price is high and it is difficult to put it into practical use.

(2) The condensed water is sprayed and sprayed on the surface of the surface cooler by a micro centrifugal pump. However, the pump runs at a high speed, and the pump is easily damaged in the case of intermittent condensed water, which is difficult to put into practical use.

(3) The condensed water is collected and flowed on the surface cooler in a self-flow manner. However, the effective utilization rate of the condensed water is low, and it flows randomly on the surface cooler, and the dripping problem is not overcome.

(4) Add a submerged evaporator. An evaporative condenser is attached, but this method complicates the air conditioning system, increases the failure rate, and loses the quality reliability of the air conditioner.

(5) Use the fan blades to condense the condensate. However, the condensed water of this structure has low effective utilization rate and is only suitable for window air conditioners, and 95% of the existing household air conditioner products are split type air conditioners.

(6) Concentrate the condensed water, and use water. Such as flushing and watering, but this method can not save energy.

(7) Diaphragm humidifier. A multi-layered water sheet layer surrounded by a hydrophobic polytetrafluoroethylene microporous film to form a film bag. The water sheet layer is padded with a corrugated plate to form an air passage. When air flows between the water sheet layers, the water vapor is at its pressure because the water vapor pressure on the water side of the moisture permeable membrane is greater than the water vapor partial pressure on the air side. Under the action of the difference, the air side passes through the membrane hole of the moisture permeable membrane from the water side. For example, "HVAC and Air Conditioning", Volume 2, 2003, Volume 33, "Usage and Energy Saving of Room Air Conditioner Condensate". However, this method will increase the wind resistance of the air conditioning condenser fan, reduce the heat transfer coefficient of the whole machine, and has a complicated structure and high cost.

(8) Add a small water tank to the air conditioner, first make the condensed water flow into the water tank, then use the micro pump to pump the condensed water to the atomizer, and the atomizer sends the atomized water into the room to complete the indoor Humidification; the atomizer is placed at the air supply duct, and the conversion of the condensed water flow direction is completed by a two-way solenoid valve. For example, "Instrument Technology and Sensors", No. 10, 2005, "Research on the technology of drip-free adjustable humidity for household air conditioners". However, this method requires a complex sensor protection system, and the overall cost is high, making the cost of household air conditioners difficult to digest.

(9) The combination of micro-pump and 0.5mm×64-hole copper pipe is the most effective. The energy efficiency ratio is 8.38%, the cooling capacity is increased by 1.58%, and the air-conditioning power is reduced by 6.29%. For example, "Refrigeration and Air Conditioning", No. 2, 2006, "Exploration and Research on Small-scale Split Air Conditioning Condensate Utilization and Energy Saving Experiments". But this method does not work reliably.

In summary, although the existing condensed water is used in many ways, it has the following defects: high cost, poor reliability, complicated structure, or low effective utilization. This is also the reason why the above-mentioned methods have not been installed for more than ten years, and there are no condensed water utilization devices installed in commercial air conditioners.

In addition, there are technologies for directly spraying tap water to the air cooler, such as the air conditioning cooling spray system disclosed in CN 201731590U. The volume is increased greatly, the water consumption is large, and a special water pump is needed, which has high cost and complicated structure, and has not been widely promoted at present.

The capillary principle is also used to enhance heat dissipation, such as the condenser with capillary cooling device disclosed in CN 202281425U, but In the following questions:

First, the capillary structure is directly placed on the surface of the metal fin (fin). The large-area, wet capillary structure is in direct contact with the air, allowing the water to evaporate directly on the surface of the capillary structure. However, since the condenser is installed outdoors, the fan drives a large amount. When the air is blown to the surface of the capillary structure, the dust in the outdoor air will gradually adsorb on the surface of the wet capillary structure, which is easy to block the heat dissipation channel, which not only does not increase the heat dissipation effect but also seriously reduces the heat dissipation performance; and the porous capillary structure adsorbs. It is also difficult to clean after fine dust, and it is difficult to maintain in actual use;

Second, since the surface of one side of the metal fin (fin) piece is substantially covered with a fibrous capillary structure, if it is short of water in use, it is like a layer of heat-insulated cotton on a high-temperature metal fin (wing) piece. This will also greatly reduce the heat dissipation effect of the original fin (wing) sheet, which will damage the air conditioner compressor in severe cases;

Third, the capillary water absorbing layer and the water tank are arranged below the fins (fin) fins, and the water in the water tank is to permeate upward under the capillary force, which is bound to be affected by gravity, and the water is difficult to reach the upper end of the capillary structure in a short time. Therefore, it is necessary to add pre-wet water pipes, solenoid valves and other components to complicate the structure and reduce the reliability of work. At the same time, the dirt formed by the outdoor dust will flow along the capillary water-absorbing layer to the sink below, and the mud will be removed. Will fill the sink and invalidate the entire capillary suction system;

Fourth, since the capillary structure is directly on the surface of the metal fin (fin) sheet, and the capillary structure is a loose fibrous structure, and the physical properties of the metal fin (fin) sheet are different, the strength of the contact fit of the two is subject to long-term outdoor High temperature, high humidity, vibration, wind blowing, especially the test of high pressure water cleaning, large area of capillary fiber is easily damaged, easy to peel off with metal fin (wing), there is a matching gap, the service life and heat dissipation effect will be reduced;

Fifth, the patent design only considers how to control the water supply quantity, does not take into account the problem of calcium and magnesium ions in the water, although it can enhance the heat dissipation effect of the condenser in a short time, but as long as it runs for several months, the high temperature condenser fin ( The fins will cause the calcium and magnesium ions in the water to form a lot of hard scale on the surface of the capillary structure, which will gradually reduce the heat dissipation effect and is extremely difficult to clean. At the same time, in order to control the water supply of the tap water, a complex control system is designed. For example, if there is a water level sensor in the water tank, a water stop valve for controlling the water volume, a solenoid valve, etc., the work reliability is lowered;

Sixth, although it can enhance the heat dissipation effect of the outdoor condenser of the air conditioner during air conditioning and cooling in summer, it can be known from the principle of cooling and heating of the air conditioner that the condenser located in the outdoor high temperature heat dissipation in the summer is heated in winter. The low-temperature endothermic evaporator, the water vapor in the air will condense a large amount of condensed water on the low-temperature metal fin (fin) piece, so the fins (fin) of the conventional air conditioner are made into a smooth surface to facilitate the rapid condensation. Downstream, at this time, if a large area of capillary structure is provided on the smooth fin (fin) piece, on the one hand, the speed of the condensed water leaving the metal fin (wing) piece is lowered, and on the other hand, the capillary structure filled with the condensed water will Severely hindering the heat transfer between the air and the metal fins (fin), causing the condensate to freeze rapidly, gradually forming a large area of ice between the fins (wings), blocking the flow of air, forming a vicious circle, making the air conditioner unable to operate normally; At this time, it is also impossible to take the capillary structure from the fins (wings) On-chip removal, its practicality is not as good as the previous direct spray fin patent, which is the basis of the patent can not be practical.

Summary of the invention

The technical problem to be solved by the invention is to overcome the above-mentioned deficiencies of the prior art, and provide a composite structure wet film air cooler with energy saving, low cost, no power, high reliability and simple structure for the air conditioner, which can completely recover the air conditioner. The condensed water can improve the heat dissipation efficiency and energy efficiency ratio of the air conditioner air cooler, reduce the exhaust pressure during cooling of the air conditioner, and prevent the air conditioner air cooler from frosting during heating in winter.

The technical solution adopted by the present invention is: a composite structure wet film air cooler comprising a plurality of fins arranged in parallel and a plurality of heat exchange tubes penetrating the fins, the surface of the fins being provided with A wet film layer extending outwardly from at least one water absorption band for introducing water into the wet film layer, or a drip device disposed on an upper portion of the wet film layer.

Further, the wet film layer is disposed between two adjacent fins to form a tight "sandwich" structure. In this way, the wet film does not directly contact the air in a large area, so that the dust in the air is directly adsorbed on the wet wet film surface, blocking the fins, affecting the heat dissipation effect, and a small amount of dust is easy to be cleaned and maintained even if it is adsorbed on the smooth fins; Thereby, the wet film layer is in close contact with the fins, allowing the water to naturally and uniformly infiltrate the entire surface of each fin without any power.

Further, the water absorption belt is disposed on the side or the top of the wet film layer to ensure that water does not drip from the wet film layer and can be covered with the wet film layer.

Further, the wet film layer is provided on both sides of the fin.

Further, the surface of the fin is provided with a plurality of punches, punches or louvers. A louver is preferred. The slits, punches or blinds are created to allow the moisture in the wet film layer to evaporate, similar to the numerous fine cooling towers on the surface of the fins.

Further, the wet film layer on the surface of the fin is distributed in a whole sheet so that moisture rapidly infiltrates into the entire surface of each fin. The wet film layer may also be partially disposed, and when the wet film layer is partially disposed, it may be distributed in a strip shape or a network.

Further, the surface of all fins or partial fins in the air cooler is provided with a wet film layer to ensure that moisture can infiltrate the entire surface of all the fins.

Further, the fins are made of a metallic material of aluminum, copper or stainless steel.

Further, the wet film layer and the water absorption belt are made of a water absorbing fiber material, or are made of the same material metal material fused with the fin, or the inner layer is a water absorbing fiber material, and the outer layer is fused with the fin. Made of a mixture of metal materials. A water-absorbent fiber material is preferred to ensure rapid and uniform diffusion of moisture within the wet film layer to the surface of the fin. The water absorbing fiber may be fiber paper, glass fiber, etc., has strong hydrophilicity, is resistant to acid and alkali corrosion, is resistant to ultraviolet rays, and is not aging. Under the action of fiber wicking, the water absorbing belt naturally infiltrates the water in the water storage tank to Wet film layer.

Further, a water storage tank located outside the fin to supply water to the water absorbing belt is further provided.

Further, the drip device is provided with a water supply tank for supplying water to the drip pipe of the drip device at the upper part of the fin, and is used for storing condensed water or rainwater generated by the indoor unit of the air conditioner.

Further, in order to prevent scale in the tap water, an ion exchange device may be disposed at the water inlet of the water storage tank or the water supply tank to treat calcium and magnesium ions in the tap water; and a rainwater collecting device may be disposed at the water inlet of the water storage tank or the water supply tank. Obtain soft water with little calcium and magnesium ions; in addition, when the air conditioner is heating in winter, it can also add anti-freezing liquid with a certain concentration to ensure that the fins are not frosted.

The working principle of the invention:

Based on the bionic principle of water movement in plants in nature, on the basis of the simple dry air dissipation of the ordinary surface cooler, the invention combines the wet film layer with the fins and increases the direct evaporation of water on the surface cooler. In the link, the air conditioner dissipates not only the sensible heat transfer when the air flows, but also the latent heat release of the water vaporization phase change (liquid-gas). The invention specifically utilizes the capillary force of the fiber and the transpiration force generated by the evaporation of the moisture in the wet film layer after heating by the surface cooler, similar to the movement principle of the moisture in the plant, so that the water naturally, uniformly and rapidly infiltrates into each fin. The entire surface does not require any power; at the same time, there are a number of punches, punches or blinds on the surface of the fins, which allow the moisture in the wet film layer to evaporate, similar to the numerous cooling towers on the surface of the fins. It achieves the same heat dissipation effect and energy efficiency ratio as the cooling tower + water-cooled air conditioner.

A preferred embodiment of the present invention: two adjacent metal fins press the water-absorbing wet film layer in the middle to form a composite "sandwich" structure, and the moisture in the wet film is punched and punched through the metal fins. Or the louver evaporates, the wet film does not directly contact the air in a large area, avoiding the dust of the air directly adsorbing on the wet wet film surface, blocking the fins, affecting the heat dissipation effect, even if a small amount of dust is adsorbed on the fins, the smoothness thereof The metal surface also facilitates the removal of dust particles, making it easier to clean and maintain. Moreover, since the wet film layer is tightly pressed between the two metal fins, its service life is almost the same as that of the fins, and the water washing during cleaning is also prohibited.

In addition, the composite wet film unit of each "sandwich" structure has the same heat exchange area as the two heat dissipating surfaces of a metal fin, so that the heat dissipating area of the composite wet film cooler can still be compared with the original conventional table. The cooling unit has the same heat dissipation area. In this way, even if the composite wet film lacks water, the surface cooler can directly use the outer surface of the fin to directly dissipate heat from the air, and does not depend on the wet film layer, so that the air conditioner operates normally without any risk.

According to a preferred embodiment of the present invention, the water absorption belt is disposed on the side of the wet film layer: under the action of the capillary principle, the flow direction of the water in the wet film is naturally infiltrated into the upward and downward directions, and the relative relationship between the water storage tank and the wet film layer is adjusted. The height allows the moisture to penetrate quickly and uniformly into the upper and lower parts of the wet film layer (the height of the upward penetration can reach the top of the wet film layer, and it can just balance with the gravity. When it penetrates downward, the gravity will accelerate the water penetration). There is no need for other auxiliary (pre-wet water pipe) devices; in addition, in actual use, the dust on the fins, or the muddy water during cleaning, will fall down naturally along the fins, and will not flow into the side water storage tank.

Further, in the simplified system of the present invention, it is also possible to directly pass the condensed water through the drip device on the top of the wet film and evenly drip onto the wet film to make the structure simpler.

The innovation of the invention is also that the composite wet film air cooler is used for cooling the condenser for cooling in summer, and can be used as an endothermic evaporator for heating in winter. Not only can the condenser's heat dissipation function be enhanced in the summer; but also in the winter air conditioning heating, by adding antifreeze to the storage tank, preventing the fins from frosting, strengthening the winter heating effect, and solving the current air conditioning winter system. When the heat is finned, the heat is inefficient.

Another major feature of the present invention is that, due to the "sandwich" structure, air condensate condenses on the surface of the metal fins on both sides of the "sandwich" composite structure during heating in winter, and falls directly, which is difficult to prevent from the antifreeze in the wet film. contact. When used in large air source heat pump air conditioning units, compared with other heat source towers (such as closed heat source towers) or energy tower air conditioning systems that use antifreeze and air completely mixed, the amount of antifreeze can be greatly reduced, and operating costs can be saved. And make the air conditioning system easier.

Moreover, due to the "sandwich" structure, its appearance is completely smooth, like the conventional surface cooler, without affecting the heat exchange between the outdoor air and the fins, and the elimination of condensed water, and the heat exchange area can also be done. To the full equivalent of the conventional table cooler. Therefore, even if it is not used in the winter heating, it can operate normally.

Finally, the water required for the wet film and the water tank in the present invention is mainly taken from the condensed water generated by the evaporator during cooling, so that the air conditioner saves electricity and saves water; and the condensed water does not contain calcium or magnesium minerals, and does not On the other hand, there is condensation on the surface of the fins; on the other hand, only the air conditioning operation has condensed water, and the amount of condensed water in the air conditioner has a corresponding relationship with the heat dissipation of the air conditioner. By proper matching, the condensed water can be completely evaporated, and no excess water will appear. Outflow, so there is no need to set complicated water level and water flow control system in the system, which is very simple. From the perspective of condensate discharge, it is also an air conditioner with no condensed water, which eliminates the installation of condensate drain pipes and is more convenient for air conditioner installation and use.

In short, the invention can not only enhance the heat dissipation of the air conditioner in summer, but also save energy by more than 20%, and can solve the frosting problem of the air conditioner in winter, improve the heating effect, and has the advantages of simple structure, safety and reliability, and real environmental protection, water saving and energy saving; At the same time, whether it is summer cooling or winter heating, even if the wet film layer in the air cooler is not used, the air conditioner can be operated normally.

DRAWINGS

1 is a schematic perspective view of an embodiment of the present invention;

Figure 2 is a plan view showing the structure of the embodiment shown in Figure 1;

Figure 3 is a schematic enlarged plan view of the fin of the embodiment shown in Figure 1;

4 is a schematic enlarged view showing the wet film layer of the embodiment shown in FIG. 1;

Figure 5 is a schematic structural view of a water storage tank according to an embodiment of the present invention;

Figure 6 is a schematic view of the upper drip device of the wet film layer;

Figure 7 is a schematic plan view of the drip device.

detailed description

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

Example 1

Referring to FIG. 1 and FIG. 2, the composite structure wet film cooler provided in this embodiment includes a plurality of fins 1 arranged in parallel and a plurality of heat exchange tubes 2 penetrating through the fins 1, and the heat exchange tubes 2 are contained therein. a flowing refrigerant; a wet film layer 3 is pressed between two adjacent fins 1 to form a "sandwich" structural unit; the outer dimension of the wet film layer 3 is substantially identical to that of the fin 1, so that the fin 1 is wetted Layer 3 is completely covered and intimately contacted to ensure a natural, uniform, and rapid infiltration of moisture to the entire surface of each fin 1 without any power.

Referring to FIGS. 4 and 5, the water supply mode of the wet film layer 3 is a solution in which the water absorption zone 4 is added to the water storage tank 5, and the lower middle side of the wet film layer 3 is outwardly extended to absorb water which is introduced into the wet film layer 3. The belt 4 ensures that the water does not drip from the wet film layer 3 and can be covered with the wet film layer 3 without being turned on. Among them, the fin 1 is made of a metal material aluminum, and the surface of the metal material aluminum can be treated with anti-corrosion and hydrophilic film to resist corrosion; the wet film layer 3 and the water absorption belt 4 are both made of composite glass fiber.

Referring to FIG. 3, the surface of the fin 1 is provided with a plurality of louvers 11, and the louvers 11 are arranged in parallel in a plurality of rows. The louvers 11 are provided with a first through hole 21 through which the heat exchange tubes 2 are disposed. The opening of the louver 11 causes the moisture in the wet film layer 3 to evaporate continuously, similar to the provision of numerous fine cooling towers on the surface of the fin 1.

Referring to FIG. 4, the wet film layer 3 is provided with a second through hole 22 corresponding to the first through hole 21 and which can pass through the heat exchange tube 2.

Referring to Fig. 5, the composite structure wet film cooler further includes a water storage tank 5 provided at the lower middle portion of the fin 1 for collecting condensed water generated by the air conditioner indoor unit. The characteristic of condensed water is: it does not contain calcium and magnesium minerals, and it will not form scale on the surface of fins. If the dosage is increased, it can supplement the ion resin to exchange pure water.

When applied to a large air conditioning unit, tap water can be replenished to the water storage tank 5 when the amount of condensed water is insufficient, depending on the amount of water consumed. In order to prevent scale in the tap water, an ion exchange device may be provided at the water inlet 51 to treat calcium and magnesium ions in the tap water.

Further, in order to save water, rainwater can be used, and a rainwater collecting device is provided at the water inlet 51 of the water storage tank 5 to obtain soft water having little calcium and magnesium ions.

The working principle of this embodiment is as follows:

(1) For air conditioning units, take summer cooling as an example:

All the condensed water is collected into the water storage tank 5, and the water absorbing belt 4 naturally infiltrates the condensed water in the water storage tank 5 to the wet film layer 3 on the fin 1 by the capillary action of the fibers, and the moisture of the wet film layer 3 is uniformly diffused. To the surface of the fin 1. Since the heat exchange tube 2 contains a high-temperature refrigerant, water is evaporated by heating the water adsorbed on the surface of the fin 1 to absorb the condensation heat of a large number of air conditioners, and the energy efficiency ratio of the ordinary air-cooled air conditioning unit is significantly improved, and cooling is achieved. Tower + water-cooled air conditioner has the same heat dissipation effect and energy efficiency ratio, so that the COP of ordinary air-cooled air-conditioning is increased from 3.2 to 4.1, and energy saving is more than 20%.

(2) When using air conditioning units, take winter heating as an example:

A certain concentration of antifreeze liquid is added to the water storage tank 5, and the antifreeze liquid is infiltrated to the surface of the fin 1 through the water absorption belt 4 and the wet film layer 3 in sequence, so that the fin 1 can be prevented from frosting; at the same time, most of the condensed water in the air will be Along the fin 1, the natural downward flow under the action of gravity does not have a great influence on the concentration of the antifreeze in the wet film layer 3, thereby reducing the amount of antifreeze required for the entire system.

Among them, the antifreeze may be glycerin, CaCl ₂ , urea, etc., and has no corrosion to the fins 1 .

In short, the energy saving, low cost, no power, high reliability and simple structure of the embodiment can improve the heat dissipation efficiency and the energy efficiency ratio, reduce the exhaust pressure during cooling of the air conditioner, and ensure the air conditioner cooler on the other hand. No frosting during winter heating.

This embodiment can be used not only for household air conditioners, small commercial air conditioner units, but also for large central air conditioning units.

When used in household air conditioners, the indoor condensate in summer can be completely evaporated through the composite structure wet film cooler, which is a high-efficiency air conditioner without condensation water;

When used in large central air conditioning systems, it is simpler than existing chiller systems, and has higher energy efficiency than existing air-cooled heat pump units. When using a sandwich structure, air condensate condenses on the fin surface and falls directly during heating in winter. Without contacting the antifreeze in the wet film, the air conditioning system of the heat source tower or the energy tower completely mixed with the antifreeze and the air can greatly reduce the amount of the antifreeze added and make the system simpler.

Example 2

The difference from Embodiment 1 is that the wet film layer 3 is uniformly distributed in a strip shape on one side of each fin 1, and the wet film layers 3 of all the fins 1 may be arranged on the same side or on different sides.

Example 3

The difference from Embodiment 1 is that in a part of the fins 1, a wet film layer 3 is pressed between two adjacent fins 1 to form a "sandwich" structure; and in another part of the fins 1, one of each fins 1 The side is pressed with a wet film layer 3.

Example 4

The difference from Embodiment 1 is that, in a part of the fins 1, the outer dimensions of the wet film layer 3 are substantially the same as the size of each of the fins 1, so that the fins 1 are completely covered by the wet film layer 3; in the other part of the fins 1, The wet film layer 3 is evenly distributed on the fins 1 in a strip shape.

Example 5

The difference from Embodiment 1 is that the surface of the fin 1 is provided with a plurality of slits, and the slits are arranged in a plurality of rows in parallel.

Example 6

The difference from Embodiment 1 is that the fin 1, the wet film layer 3, and the water absorbing tape 4 are each made of a metal material aluminum.

Example 7

The difference from Embodiment 1 is that the fins 1 and the wet film layers 3 are each made of a metallic material copper, and the water absorbing tape 4 is made of a composite glass fiber material.

Example 8

The difference from Embodiment 1 is that the fin 1 is made of a metallic material stainless steel, and the inner layers of the wet film layer 3 and the water absorbing tape 4 are both composite glass fiber materials, and the outer layers are plated with a metallic material stainless steel.

Example 9

The difference from the embodiment 1 is that the wet film layer 1 extends outwardly from the two water absorption belts 4, one at the top and one at the middle and lower portions, and two water storage tanks 5 are provided, and one water storage tank 5 is disposed at the outer bottom of the fins 1. One is disposed between the two water absorption bands 4.

Example 10

The difference from Embodiment 1 is:

Referring to Figs. 6 and 7, the water supply method of the wet film layer 3 is a simple drip device 6, and the drip device is provided at the upper portion of the wet film layer 3. The drip device 6 is composed of a water supply tank 61 and a drip pipe 62. One end of the drip pipe 62 extends into the water supply tank 61. The drip pipe 62 has a drip hole 63 at the lower portion thereof, and the number and position of the drip hole 63 and the wet film layer 3 Corresponding. The air-conditioning condensate enters the water supply tank 61 from the water inlet 51, and is dripped from the drip hole 63 uniformly onto the wet film layer 3 through the drip pipe 62.

When applied to a large air conditioning unit, tap water can be replenished to the water supply tank 61 when the amount of condensed water is insufficient, depending on the amount of water consumed. In order to prevent scale in the tap water, an ion exchange device may be provided at the water inlet 51 to treat calcium and magnesium ions in the tap water.

Further, in order to save water, rainwater can be used, and a rainwater collecting device is provided at the water inlet 51 of the water supply tank 61 to obtain soft water having little calcium and magnesium ions.

The working principle of this embodiment is as follows:

(1) For air conditioning units, take summer cooling as an example:

The air-conditioning condensate enters the water supply tank 61 through the water inlet 51, passes through the drip pipe 62, and is uniformly dropped from the drip hole 63 onto the wet film layer 3, and the moisture of the wet film layer 3 is uniformly diffused to the surface of the fin 1. Since the heat exchange tube 2 contains a high-temperature refrigerant, water is evaporated by heating the water adsorbed on the surface of the fin 1 to absorb the condensation heat of a large number of air conditioners, and the energy efficiency ratio of the ordinary air-cooled air conditioning unit is significantly improved, and cooling is achieved. Tower + water-cooled air conditioner has the same heat dissipation effect and energy efficiency ratio, so that the COP of ordinary air-cooled air-conditioning is increased from 3.2 to 4.1, and energy saving is more than 20%.

(2) When using air conditioning units, take winter heating as an example:

A certain concentration of antifreeze solution is added to the water supply tank 6, and the antifreeze solution is infiltrated to the surface of the fin 1 through the drip hole 63 and the wet film layer 3 in sequence, thereby ensuring that the fin 1 does not frost; at the same time, most of the condensed water in the air will be Along the fin 1, the natural downward flow under the action of gravity does not have a great influence on the concentration of the antifreeze in the wet film layer 3, thereby reducing the amount of antifreeze required for the entire system.

Since the structures of the composite structure wet film coolers of the above-described Embodiments 2 to 10 are understood by ordinary people, they are not represented by other drawings.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention. It is obvious that those skilled in the art can make various modifications and changes to the invention without departing from the spirit and scope of the invention. Such modifications and variations of the present invention are intended to be included within the scope of the present invention.

Claims

A composite structure wet film cooler comprising a plurality of fins arranged in parallel and a plurality of heat exchange tubes penetrating the fins, wherein a surface of the fins is provided with a wet film layer, The wet film layer extends outwardly from at least one water absorbing tape for introducing water into the wet film layer, or a drip device is disposed on an upper portion of the wet film layer.
The composite structure wet film cooler of claim 1 wherein said wet film layer is disposed between adjacent fins to form a "sandwich" structure.
The composite structure wet film cooler according to claim 1 or 2, wherein the water absorbing tape is disposed on a side or a top of the wet film layer.
The composite structure wet film cooler according to claim 1 or 2, wherein the wet film layer is provided on both sides of the fin.
The composite structure wet film cooler according to any one of claims 1 to 4, wherein the wet film layer on the surface of the fin has a whole sheet distribution, a strip shape or a mesh distribution.
The composite structure wet film cooler according to any one of claims 1 to 5, characterized in that the surface of all the fins or partial fins in the surface cooler is provided with a wet film layer.
The composite structure wet film cooler according to any one of claims 1 to 6, wherein the surface of the fin is provided with a plurality of punches, punches or louvers.
The composite structure wet film cooler according to any one of claims 1 to 7, wherein the fins are made of a metallic material of aluminum, copper or stainless steel.
The composite structure wet film cooler according to any one of claims 1 to 8, wherein the wet film layer and the water absorbing tape are made of a water absorbing fiber material or a metal material of the same material fused with the fins. It is made of a mixture of the same material and a metal material mixed with the fins.
The composite structure wet film air cooler according to any one of claims 1 to 9, further comprising: a water storage tank located outside the fin to supply water to the water absorption belt; or the drip device is provided with the fin The upper water supply tank for supplying water to the drip pipe of the drip device.