WO2014012287A1 - Air conditioning unit with filler coupling coil pipe evaporative type condenser - Google Patents

Description

 The invention relates to the field of air conditioning equipment, in particular to an air conditioning unit of a coil evaporative condenser.

^, using an evaporative condenser to release heat into the outdoor air and applied to the air conditioning unit is an important way to achieve efficient and stable cooling. Compared with water-cooled condensers and air-cooled condensers, the heat exchange efficiency is high. Has significant energy saving and emission reduction prospects. At present, the coil for evaporative condenser used in the air-conditioning unit on the market is a transverse coil, which is cooled by spraying water on the outer surface of the coil, and uses circulating spray water to evaporate air to remove heat. Since the cooling wind direction is perpendicular to the coil (that is, the cooling air passes through the plane space formed by each heat exchange tube and is perpendicular to the straight pipe section of the heat exchange tube), the coil has a windward side and a leeward side, and the leeward side Lack of air convection heat transfer reduces coil heat transfer efficiency. On the other hand, since the effective heat exchange area of the transverse coil is small, the length of the coil to be used needs to be increased. The same as the H inch, due to the misalignment between the tubes and the tubes of the conventional transverse coil, there is no mechanical cleaning operation space, and there is also The disadvantage of being difficult to clean. Therefore, the lack of lateral coils greatly limits the use of evaporative condensers in air conditioning units.

The purpose of the present invention is to overcome the shortcomings of the prior art and to provide an air conditioning unit with a packed coupling coil evaporative condenser to improve heat exchange efficiency.

 The object of the invention is achieved by the following technical solution:

 An air conditioning unit with a packed coupling coil evaporative condenser, comprising a compressor, an evaporative condenser, a throttling device, an evaporator and a fan, the evaporative condenser comprising a coil heat exchanger, a cooling fan, and a cloth a water heater and a sump; the coil heat exchanger is composed of a plurality of heat exchange fins connected through an inlet header and an outlet header; the heat exchange fins include a coil and a filler, and the coil is provided with at least A piece of filler for guiding the spray cooling water from the upper heat exchange tube to the lower heat exchange tube.

Preferably, the coil is longitudinally disposed, that is, the cooling wind blown by the fan is along the straight tube of the coil Further, the heat exchange tubes of the coil are S-shaped; the filler is disposed between the adjacent heat exchange tubes to connect the heat exchange tubes into a continuous water flow surface.

 Further, the straight pipe sections adjacent to the heat exchange tubes are parallel to each other, and the pipe spacing of the straight pipe sections adjacent to the heat exchange pipes is the same, or the pipe spacing is from the upper layer receiving the spray cooling water to the shower cooling. The lower layer of water gradually becomes smaller.

 Preferably, the straight pipe section of the heat exchange tube has a downward slope along the direction of liquid flow in the pipe. Alternatively, the length of the straight pipe section of the heat exchange tube is gradually increased from the upper layer which is first received by the cooling water spray to the lower layer which receives the spray cooling water.

 Further, optionally, the heat exchange tube of the coil is S-shaped, and one or more pieces of the filler are disposed in a plane space formed by the heat exchange tube, and cooperate with the heat exchange tube Fixedly, continuously covering at least a portion of the surface of the plurality of heat exchange tubes.

 Further, the exhaust port of the compressor is connected to the gas pipe of the evaporative condenser, and the liquid pipe of the evaporative condenser is connected to the liquid pipe of the evaporator through the throttling device, and the gas pipe of the evaporator and the suction of the compressor The air outlet unit has a refrigeration cycle mode; the evaporative condenser is one or more parallel.

 Optionally, the exhaust port of the compressor is connected to a gas pipe of the evaporative condenser, and the liquid pipe of the evaporative condenser is connected to the liquid pipe of the evaporator through a throttling device, the gas pipe of the evaporator and the compressor The air inlet unit is connected, so the air conditioning unit has a refrigeration cycle mode and a heat pump cycle mode; the air conditioning unit is provided with a first refrigeration wide, a second refrigeration valve, a first heat pump wide and a second heat pump valve; the first refrigeration valve is disposed at a second refrigeration valve is disposed on a connecting line between the air inlet of the compressor and the gas pipe of the evaporator, and the first heat pump is disposed at the compressor. The second heat pump valve is disposed on the connecting pipe of the gas pipe of the evaporator and the gas pipe of the evaporating condenser.

 Optionally, the exhaust port of the compressor is provided with a first commutation width, and the suction port of the compressor is provided with a second commutation width; the two outlets of the first reversing valve are respectively connected with the evaporative condenser The gas pipe is connected to the gas pipe of the evaporator, and the two inlets of the second commutation are respectively connected with the gas pipe of the evaporative condenser and the gas pipe of the evaporator; the first refrigerating valve, the second refrigerating valve, and the first The heat pump and the second heat pump use an electric wide or manual valve; the first and second reversing valves are electric or pneumatic two-position three-way reversing valves.

Optionally, the air conditioning unit is provided with a four-way valve, and the four interfaces of the four-way reversing valve are respectively connected to the compressor exhaust port, the gas pipe of the evaporative condenser, the gas pipe of the evaporator, and the compressor. Suction port Connected.

 Alternatively, the air conditioning unit is set to a split or multiple online mode.

The working principle of the invention: In the refrigeration cycle mode, when the refrigerant is compressed by the compressor into a high temperature and high pressure state, the refrigerant enters the evaporative condenser through the pipeline of the refrigeration system, and after the evaporative condenser, the gas in the high temperature and high pressure state is Cooling into a low-temperature and high-pressure liquid, and forming a low-temperature and low-pressure liquid through a throttling device to enter the evaporator to exchange heat with the air to obtain cold air, and then the refrigerant liquid evaporates and vaporizes in the evaporator and is sucked away by the compressor to complete the refrigeration cycle. Mode; In the heat pump cycle mode, when the refrigerant is compressed by the compressor into a high-temperature and high-pressure gas, the refrigerant enters the evaporator through the pipeline of the refrigeration system, and exchanges heat with the air to obtain hot air. At the same time, the gas in the high-temperature and high-pressure state is cooled. The low temperature and high pressure liquid is passed through a throttling device to form a low temperature and low pressure liquid into the evaporative condenser, and then the refrigerant liquid evaporates and vaporizes in the evaporative condenser and is sucked away by the compressor to complete the heat pump cycle mode.

 The present invention has the following advantages and effects over the prior art:

 1. The invention adopts a packing-coupled serpentine coil evaporating condenser, which replaces the traditional air-cooling and water-cooling modes, and can further improve the heat exchange efficiency;

 2. Longitudinal coil is adopted, the cooling wind direction is consistent with the length of the coil, there is no windward and leeward surface, the windward surface, the leeward surface and the thousand points of the heat exchange coil surface are reduced, and the risk of scaling of the heat exchange coil is reduced;

3. The elbows at both ends of the longitudinal coil are placed in the airflow and cooling water sprinkling space to improve the effective utilization area of the coil;

 4. It is easy to clean with this evaporative condenser, it is convenient to maintain, and the use cost is low;

5. The evaporative condenser adopts a packing coupling longitudinal serpentine coil to make the cooling water flow through the surface of the upper heat exchange tube and then flow to the surface of the lower heat exchange tube under the guidance of the packing to realize the guiding water sowing and reduce the cooling water in the heat exchange. The dwell at the bottom of the tube reduces the phenomenon that the cooling water drifts backward or floats under the blowing of the cooling air, and at the same time increases the surface area of the evaporating heat transfer of the cooling water, thereby improving the heat exchange efficiency and reducing the usage of the heat exchange tubes.

1 is a schematic view showing the principle of a refrigeration cycle mode of an air conditioning unit of the present invention;

2 is a schematic view of the principle of the air conditioning unit of the present invention; 3 is a schematic view showing the principle of a heat pump cycle mode of the air conditioning unit of the present invention;

 4 is a schematic view showing the principle of using a plurality of evaporators in parallel in the air conditioning unit of the present invention;

 Figure 5 is a schematic view showing the principle of using a two-position three-way reversing valve for the air conditioning unit of the present invention;

 6 is a schematic view showing the principle of using a four-way reversing valve for the air conditioning unit of the present invention;

 Figure 7 is a schematic structural view of Embodiment 1 of the evaporative condenser of the present invention;

 Figure 8 is a partial cross-sectional view showing the A-A of the evaporative condenser of the present invention; the structure of the heat exchanger can be shown in the figure;

 Figure 9 is a schematic structural view of a heat exchange fin in the first embodiment of the evaporative condenser of the present invention; Figure 10 is a cross-sectional view of the heat transfer fin of the first embodiment of the evaporative condenser of the present invention; the cross-sectional direction corresponds to Figure 9 A-A direction;

 Figure! 1 is a cross-sectional view of another heat exchange fin of the first embodiment of the evaporative condenser of the present invention; the cross-sectional direction corresponds to the A-A direction of FIG. 9;

 Figure! 2 is a schematic structural view of Embodiment 2 of the evaporative condenser of the present invention;

 Figure 3 is a schematic structural view of the heat exchange fins in the second embodiment of the evaporative condenser of the present invention; 4 is a cross-sectional view taken along line A-A of the heat transfer fin shown in FIG. 7;

 Figure 15 is a schematic view showing another structure of the coil of the evaporative condenser of the present invention;

 Figure 16 is a schematic view showing another structure of the coil of the evaporative condenser of the present invention;

 Figure 17 is a schematic cross-sectional view showing an embodiment of the evaporative condenser of the present invention;

 Figure 18 is a schematic view showing the structure of the condenser fan placed in the front part of the heat exchanger according to the present invention;

 Figure 19 is a schematic view showing the structure of the condenser fan vertically placed in the present invention;

 Figure 20 is a schematic view showing the structure of a condenser fan placed vertically and using a double-group heat exchanger according to the present invention; Figure 21 is a schematic view showing another structure of the present invention in which a condenser fan is vertically placed and a double-group heat exchanger is used.

The present invention will be further described in detail below with reference to the embodiments and the Pfi drawings, but the embodiments of the present invention are not limited thereto.

 Example 1

1 is a schematic view showing the principle of a refrigeration cycle mode of an air conditioning unit of the present invention. As can be seen from FIG. 1, the air conditioning unit includes a compressor 1, an evaporative condenser 2, a throttling device 3, an evaporator 4, and a fan 5; The exhaust port 8 of the compressor is connected to the gas pipe 2a of the evaporative condenser, and the liquid pipe 2b of the evaporative condenser is connected to the liquid pipe 4a of the evaporator through a throttling device, the gas pipe 4b of the evaporator and the compressor The suction port 9 is connected. The evaporative condenser 2 employs a longitudinally disposed coil of a packing coupling and will not be described in detail herein. The working principle of the invention: When the refrigerant is compressed by the compressor 1 into a high temperature and high pressure state, the refrigerant enters the evaporative condenser 2 through the pipeline of the refrigeration system, and after passing through the evaporative condenser 2, the gas in the high temperature and high pressure state is cooled to a low temperature. The high-pressure liquid is formed into a low-temperature and low-pressure liquid through the throttling device 3 to enter the evaporator 4 to exchange heat with the air to obtain cold air, and then the refrigerant liquid evaporates and vaporizes in the evaporator 4 and is sucked away by the compressor 1 to complete the refrigeration. Loop mode. Example 2

2 is a schematic view showing the principle of the air conditioning unit of the present invention, which is different from the first embodiment in that the air conditioning unit is provided with a first refrigerating chamber 10, a second refrigerating valve 11, and a first heat pump valve 12. And a second heat pump valve 13; the first refrigerating valve 10 is disposed on a connecting line of the exhaust port 8 of the compressor and the gas pipe 2a of the evaporative condenser, and the second refrigerating valve 11 is disposed at the suction port 9 of the compressor On the connecting line with the gas pipe 4b of the evaporator, the first heat pump valve 12 is disposed on the connecting line of the exhaust port 8 of the compressor and the gas pipe 4b of the evaporator, and the second heat pump valve 13 is disposed at the compressor The suction port 9 is connected to the gas pipe 2a of the evaporative condenser. Therefore, the air conditioning unit has a refrigeration cycle mode and a heat pump cycle mode. Also, the evaporative condenser 2 employs a longitudinally disposed coil of a packing coupling. The working principle of the invention: When the heat pump is in the circulation mode, as shown in FIG. 3, the first heat pump width 12 and the second heat pump valve 13 are opened at this time, and the first cooling width 10 and the second refrigeration valve 11 are closed, and the refrigerant is discharged. When the compressor 1 is compressed into a high-temperature and high-pressure gas, it enters the evaporator 4 from the refrigeration system pipe, exchanges heat with the air to obtain hot air, and then the high-temperature and high-pressure gas is cooled into a low-temperature high-pressure liquid, and is throttled by the throttling device 3 The low-temperature low-pressure liquid is formed into the evaporative condenser 2, and then the refrigerant liquid evaporates and vaporizes in the evaporative condenser 2 and is sucked away by the compressor 1, completing the heat pump circulation mode. Similarly, the evaporative condenser 2 employs a longitudinally disposed coil of filler coupling. Example 3

 Fig. 4 is a schematic view showing the principle of the air conditioning unit of the present invention in which a plurality of evaporators are connected in parallel, which is different from the embodiment i in that the evaporator 4 is connected in parallel by a plurality of evaporators. Also, the evaporative condenser 2 employs a longitudinally disposed coil of a packing coupling. Example 4

 FIG. 5 is a schematic view showing the principle of the ffi two-position three-way reversing valve of the air conditioning unit of the present invention. Compared with the first embodiment, the difference is that the exhaust port 8 of the compressor 1 is provided with the first two. a three-way reversing valve 14 , the suction port 9 of the compressor is provided with a second two-position three-way reversing valve 15; the first two-position three-way reversing the width of the two outlets respectively and the gas of the evaporative condenser The tube 2a is connected to the gas tube 4b of the evaporator, and the two inlets of the second two-position three-way switching valve 15 are connected to the gas tube 2a of the evaporative condenser and the gas tube 4b of the evaporator, respectively. Example 5

 6 is a schematic view showing the principle of using a four-way reversing valve for the air conditioning unit of the present invention. Compared with the first embodiment, the difference is that the four interfaces of the four-way reversing width 16 are respectively arranged with the compressor. The gas port 8, the gas pipe 2a of the evaporative condenser, the gas pipe 4b of the evaporator, and the suction port 9 of the compressor are connected. The evaporative condenser 2 used in the above embodiment will be described in detail below.

 Figure 7 and Figure 8 show the structure of the evaporative condenser 2 of the present invention, including a coil heat exchanger, a cooling fan 21, a water pump 22, a water distributor 23, a sump 24 and a frame 25; The heat exchange fins formed by the plurality of serpentine coils are connected by a mouthpiece header 28 and an outlet header 29. Each of the heat exchange fins includes a longitudinal serpentine (S-shaped) coil 26 and a packing 27 disposed between the planar spaces formed by the serpentine coils, and the packing and the coil form a tight fit structure, that is, the coupling therebetween Connected to form a segment structure. The coil is longitudinally disposed, that is, the cooling wind blown by the fan flows along the approximate length direction of the straight pipe section of the coil (the two do not need to be completely parallel); basically, the cooling wind is from each heat exchange fin The formed planar space is swept flat, and the coil 7 is provided with at least one piece of packing 8 for guiding the spray cooling water from the upper heat exchange tube to the lower heat exchange tube.

Wherein, the serpentine coil 26 is formed by continuous S-shaped bending of the heat exchange tubes, wherein the straight sections of the heat exchange tubes 261 are substantially parallel. The coil 26 can also be fitted with a packing and suitable for use in other forms within the evaporative condenser. Shape. The heat exchange tube of the serpentine coil 26 may be a copper tube, a stainless steel tube or a galvanized steel tube, etc., and the internal flow passage has a circular, elliptical, spiral, corrugated, and olive shape. As can be understood by those skilled in the art, the inner and outer surfaces of the serpentine coil 26 can adopt a smooth surface, preferably an enhanced heat transfer surface provided with internal and external threads, while the outer surface of the serpentine coil is provided with hydrophilic or anticorrosive. coating. Each serpentine coil has an inlet and an outlet for the flow passage.

 Figures 9 and 10 show the construction of the heat transfer fins, including the coil 26 and the packing 27, having a structure in which a piece of packing 27 is formed in continuous coupling with the coil 26. As shown in the figure, the filler of the one piece corresponds to the heat exchange tube 261 of the corresponding position coil, and a plurality of grooves 271 matched with the size are provided for accommodating the heat pipe. When installing, it is only necessary to directly attach a piece of filler to the surface of the heat exchange tube of the serpentine coil in a snap-fit manner, and of course, it can also assist other fixed connections. After installation, the above-mentioned piece of filler 27 completely covers one side surface of the heat transfer tube of the coil 26. The filler 27 is made of, but not limited to, a rubber material such as rubber (PVC, PP, PE, etc.), paper or aluminum foil, or copper foil. The filler 27 may be a flat plate filler having a smooth surface, or may be a one-way or multi-directional corrugated filler; the cross-sectional shape may be wavy, rectangular or oblong, wherein preferably one or both sides of the filler are formed. The undulating convex and concave surface facilitates the flow of the spray cooling water and increases the residence time of the cooling water on the surface of the filler, and correspondingly increases the evaporation heat exchange area.

 Preferably, another type of filler and coiled structure may be used. The packing 27 is two sheets which are fitted to each other on both side surfaces of the serpentine coil in a snap-fit manner to form a continuous coupling. The two sheets of filler 27 can enclose the heat exchange tubes 261 of the coils, or a certain gap can be left at the joint of the two sheets of filler 27, as shown in Fig. 11, the slit can allow a cooling water to flow through The surface of the heat exchange tube.

 During operation, the high temperature fluid enters the serpentine coil 26 through the inlet header 28, at which time the water pump 22 delivers the low temperature water in the sump 24 to the water distributor 23 at the top of the serpentine coil, and sprays it onto the serpentine tray through the nozzle. The outer surface of the tube forms a very thin water film. At the same time, the fan 21 introduces a wind having a lower temperature and a relative humidity into the space where the evaporative condenser is located, and the heat exchanger and the heat exchanger and the filler 27 are passed through. The cooling water is subjected to sufficient heat exchange: part of the water in the water film absorbs heat and evaporates, and the rest falls into the sump 24, and the water supply pump 22 circulates, and the high temperature fluid is cooled to a low temperature fluid and then flows out from the outlet header 29.

12-14, the present invention may also provide another type of evaporative condenser having a packing structure, including a coil heat exchanger, a fan 21, a water pump 22, a water distributor 23, a sump 24, and a frame 25; The heat exchanger is composed of a plurality of serpentine coils formed by a plurality of serpentine coils connected by an inlet header 28 and an outlet header 29. Each heat exchange fin includes a longitudinal serpentine (S-shaped) coil 26 and a packing 27, and the packing 27 is disposed in the adjacent heat exchange tube Between 20, a gap coupling is formed, that is, the gap between the heat exchange tubes 261 is filled by the filler 27 to connect the coil 26 and the filler 27 into a continuous water flow surface. Regarding the connection method, the above-mentioned filler 27 can be fixed between the coil 26 and the packing 27 by welding, snapping or connecting means between the heat exchange tubes of the coil 26. For example, the connecting member is a strap F, and one or more fixing holes are formed at the edge of the filler 27, and a strap is passed through the fixing hole to securely bind it to the corresponding heat exchange tube 261. If the heat exchange tube of the coil is a circular tube or an elliptical tube, the snapping mode may also be adopted, that is, the edge of the packing is set as a U-shaped groove to securely accommodate the heat exchange tube of the coil. The packing disposed between the adjacent heat exchange tubes may be one piece or a plurality of pieces.

 The coil in this embodiment can also adopt other structures. For example, in the heat exchange fins shown in FIG. 15, the straight pipe sections of the heat exchange tubes 261 of the coil 26 are parallel to each other, and the pipe pitch is gradually reduced from the upper layer to the lower layer. Accordingly, the radius of curvature of the curved portion of the heat exchange tube 261 is also gradually reduced, and the use of the filler 27 and the manner of connection with the coil 26 can be referred to the above embodiment. In use, the upper heat exchange tube 261 first receives the sprayed cold water, and then flows from top to bottom to the lower heat exchange tube 261; when the high temperature refrigerant enters from the inlet and then flows out from the outlet, due to the upper layer of the in-line refrigeration The temperature of the agent is higher than the temperature of the next layer, so that the temperature of the water passing through the upper heat exchange tube 261 rises higher than the temperature of the water passing through the heat exchange tube 261 of the next layer, so that the filler 27 of the upper layer is lengthened. It is used to extend the heat exchange time of the cooling water in the filler 27. The coil of the structure can reduce the temperature difference between the lower heat exchange tube and the cooling water, thereby improving the heat exchange effect between the heat exchange tube and the cooling water, and is superior. Alternatively, the coil shown in Fig. 16, the straight section of the heat exchange tube 261 of the coil has a downward slope along the direction of liquid flow in the tube, and the liquid in the tube is a high temperature refrigerant. When the high temperature refrigerant enters from the inlet, the refrigerant flows in a downward slope direction until the outlet flows out. Since the heat exchange tube 261 has a certain downward slope in the direction of flow, the coil more prominently reduces the pressure drop of the refrigerant from the inlet to the outlet.

 In order to obtain more cooling water heat exchange area, FIG. 17 is a schematic cross-sectional view showing another condenser of the present invention for adding a heat exchange filler, between the serpentine coils 26 and the heat exchanger in the heat exchanger. One or more pieces of filler 27' may be provided at the top or at the bottom of the heat exchanger.

 18 and 19 show that the evaporative condenser places the fan 21 at the front of the heat exchanger (air inlet) and the fan 21 vertically.

Fig. 20 shows that the evaporative condenser places the fan 21 vertically, and two sets of heat exchangers are disposed in the condenser. Figure 21 also shows another implementation of an evaporative condenser having two sets of heat exchangers. The heat exchange tubes of the heat exchanger used in this embodiment are not equal in length, that is, the length of the straight pipe section of the heat exchange tube 261 of the coil is from The upper layer to the next layer is gradually increased, wherein the upper heat exchange tube 261 first receives the spray cold water, and then flows from the top to the bottom to the lower heat exchange tube 261. The heat exchange fins provided in this embodiment are more suitable for evaporative condensers using two sets of heat exchangers. The difference from the embodiment shown in Fig. 20 is that this embodiment can install a fan of a larger size and horsepower by changing the length of the straight pipe section of the heat exchange pipe 261 without changing the outer dimensions of the condenser. The fan 21 of the solid line part is the heat exchange tube piece provided by the embodiment, and the fan 21' of the broken line part is the heat exchange tube piece of the heat exchange tube of the equal length straight pipe section shown in FIG. In comparison, the fan used in the former (solid line) is larger than the fan (dotted line) used in the latter, which increases the air volume and thus improves the heat exchange effect.

 It is to be noted that the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the invention. The invention may also be modified by materials or structures, or replaced by technical equivalents. Therefore, equivalent structural changes made by the description and illustration of the present invention, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

claims 1. An air conditioning unit with a packing-coupled coil evaporative condenser, including a compressor, an evaporative condenser, a throttling device, an evaporator and a fan. The evaporative condenser includes a coil heat exchanger and a cooling fan. , water distributor and water collection tank; The coil heat exchanger is composed of multiple heat exchange segments connected through an inlet header and an outlet header; It is characterized in that the heat exchange segment includes a coil and a filler, The coil is provided with at least one piece of filler for guiding spray cooling water from the upper heat exchange tube to the lower heat exchange tube. 2. The air conditioning unit according to claim 1, wherein the heat exchange tubes of the coil are bent in an S-shape; and the filler is provided between the adjacent heat exchange tubes to separate the heat exchange tubes. The heat pipes are connected into a continuous water surface. 3. The air conditioning unit according to claim 2, wherein the straight pipe sections of the adjacent heat exchange tubes are parallel to each other, and the tube spacing between the straight pipe sections of the adjacent heat exchange tubes is the same, or the tube spacing starts from the previous one. The upper layer receiving spray cooling water gradually becomes smaller to the lower layer receiving spray cooling water. 4. The air conditioning unit according to claim 2, wherein the straight section of the heat exchange tube has a downward slope along the direction of liquid flow in the tube. 5. The air conditioning unit according to claim 1, wherein the coil is arranged longitudinally, that is, the cooling air blown by the fan flows along the approximate length direction of the straight section of the coil. 6. The air conditioning unit according to claim 1, wherein the heat exchange tube of the coil is bent in an S-shape; the coil is arranged longitudinally, that is, the cooling air blown by the fan is along the coil flow along the approximate length direction of the straight pipe section; one or more pieces of the filler are arranged in the plane space formed by the heat exchange tube, and are fixedly connected to the heat exchange tube in a cooperative manner, and continuously cover the multiple heat exchangers. At least a portion of the surface of the heat pipe. 7. The air conditioning unit according to any one of claims 1 to 6, characterized in that the exhaust port of the compressor is connected to the gas pipe of the evaporative condenser, and the liquid pipe of the evaporative condenser passes through the throttling device It is connected to the liquid pipe of the evaporator, and the gas pipe of the evaporator is connected to the suction port of the compressor. The air conditioning unit has a refrigeration cycle mode; one or more of the evaporative condensers are connected in parallel. 8. The air conditioning unit according to any one of claims 1 to 6, characterized in that: the exhaust port of the compressor is connected to the gas pipe of the evaporative condenser, and the liquid pipe of the evaporative condenser is connected to the gas pipe through a throttling device. The liquid pipe of the evaporator is connected, and the gas pipe of the evaporator is connected with the suction port of the compressor, so the air conditioning unit has a refrigeration cycle mode and a heat pump cycle mode; the air conditioning unit is provided with a first refrigeration valve, a second refrigeration valve valve, a first heat pump valve and a second heat pump valve; the first refrigeration valve is arranged on the connecting pipeline between the exhaust port of the compressor and the gas pipe of the evaporative condenser, and the second refrigeration valve is arranged on the suction port of the compressor. The first heat pump valve is arranged on the connecting pipeline between the exhaust port of the compressor and the gas pipe of the evaporator, and the second heat pump valve is arranged on the suction port of the compressor. The connecting pipe to the gas pipe of the evaporative condenser 9. The air conditioning unit according to any one of claims 1 to 6, characterized in that: the exhaust port of the compressor is provided with a first reversing valve, and the suction port of the compressor is provided with a second reversing valve. Wide; The two outlets of the first change valve are respectively connected to the gas pipe of the evaporative condenser and the gas pipe of the evaporator, and the two inlets of the second change valve are respectively connected to the gas pipe of the evaporative condenser and the gas pipe of the evaporator. connection; the first refrigeration valve, the second refrigeration valve, the first heat pump valve and the second heat pump valve are electric valves or manual valves; the first reversing valve and the second reversing valve are electric or pneumatic Two-position three-way directional valve. 10. The air conditioning unit according to any one of claims 1 to 6, characterized in that: the air conditioning unit is provided with a four-way reversing valve, and the four interfaces of the four-way reversing valve are respectively connected to the compressor exhaust port and evaporation port. Connect the gas pipe of the condenser, the gas pipe of the evaporator and the suction port of the compressor. I The air conditioning unit according to any one of claims 1 to 10, characterized in that: the air conditioning unit is set to a split or multi-online mode.