Air conditioning unit and control method thereof

Abstract

The embodiment of the present application provides an air conditioning unit and a control method thereof, and relates to the field of air conditioners. The air conditioning unit comprises a compressor, a first heat exchanger, a second heat exchanger, a throttling mechanism, a water pump, a fan, a water collecting tray and a water spraying device. The first heat exchanger comprises a heat exchange coil and multiple groups of foil sheets. The foil sheets are provided with through holes, the heat exchange coil passes through the through holes and is connected with the foil sheets, the part of the heat exchange coil passing through the foil sheets is perpendicular to the plane where the foil sheets are located, the heat exchange coil has an inlet and an outlet, the inlet of the heat exchange coil is connected with the exhaust port of the compressor, the outlet of the heat exchange coil is connected with the first port of the throttling mechanism, and an air duct is formed between two adjacent groups of foil sheets. The embodiment of the present application can improve the heat dissipation effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of air conditioners, in particular to an air conditioning unit and a control method thereof. BACKGROUND

[0002] With the large-scale application of air-cooled and water-cooled air conditioners, the application of evaporative cooling air conditioners is also increasing due to their energy-saving characteristics. Conventional evaporative cooling air conditioners mainly adopt tube type and plate type, and need to solve the problems of uniform water distribution on the surface and continuously improve the heat exchange efficiency. SUMMARY

[0003] The purpose of the present application is to provide an air conditioning unit and a control method thereof, which can improve the heat exchange efficiency and heat exchange effect, and make the air conditioning unit run more efficiently.

[0004] Embodiments of the present application are implemented as follows:

[0005] In a first aspect, the present application provides an air conditioning unit, comprising a compressor, a first heat exchanger, a second heat exchanger, a throttling mechanism, a water pump, a fan, a water pan and a water spraying device.

[0006] The exhaust port of the compressor is connected with the inlet of the first heat exchanger, the outlet of the first heat exchanger is connected with the first port of the throttling mechanism, the second port of the throttling mechanism is connected with the inlet of the second heat exchanger, and the outlet of the second heat exchanger is connected with the suction port of the compressor.

[0007] The water pan is arranged below the first heat exchanger, the water pan is connected with a pipeline of the water spraying device, and the water pump is connected with the pipeline for conveying water in the water pan to the water spraying device, so that the water spraying device sprays water to the surface of the first heat exchanger, and the fan is used to drive the gas near the surface of the first heat exchanger to flow.

[0008] The first heat exchanger comprises heat exchange coils and multiple groups of foil sheets, the foil sheets are provided with through holes, the heat exchange coils pass through the through holes and are connected with the foil sheets, the part of the heat exchange coils passing through the foil sheets has an axis perpendicular to the plane where the foil sheets are located, the heat exchange coils have inlets and outlets, the inlets of the heat exchange coils are connected with the exhaust port of the compressor, the outlets of the heat exchange coils are connected with the first port of the throttling mechanism, and air ducts are formed between adjacent two groups of foil sheets.

[0009] The heat exchange coils comprise stainless steel pipes, the foil sheets comprise stainless steel foil or aluminum foil, and the heat exchange coils are connected to the through holes by pipe expansion; or the heat exchange coils comprise carbon steel pipes, the foil sheets comprise steel foil, and the carbon steel pipes and the foil sheets are filled with a zinc layer, a graphene coating or a nano coating.

[0010] Alternatively, the heat exchange coil comprises a copper tube, the foil comprises a steel foil or an aluminum foil or a stainless steel foil, and the heat exchange coil is connected to the through hole by tube expansion.

[0011] In the embodiment of the present application, the water spraying device can spray water on the foil, the foil is connected to the heat exchange coil, the water sprayed by the water spraying device can substantially completely cover the surface of the foil; at the same time, the foil guides the water to the surface of the heat exchange coil, so that the heat exchange coil can substantially completely distribute water, and the heat exchange between the heat exchange coil and the water film on the surface thereof is realized. Further, the fan can directly drive the water on the surface to evaporate, thereby improving the heat exchange efficiency. Further, the water film on the surface of the foil is substantially completely covered, which can improve the heat exchange efficiency of the foil and solve the problem of unstable water film in the conventional evaporative condenser, so that the air conditioning unit has a higher energy efficiency ratio. The corrosion problem of the general copper tube and aluminum fin under the working condition of spraying water can also be solved. The embodiment of the present application adopts the mode of distributing water through the foil and guiding the water to the heat exchange tube, which better solves the problem of water distribution, improves the heat exchange area, and improves the heat exchange effect of the evaporative condenser.

[0012] In an optional embodiment, the distance between two adjacent groups of foils is at least 8 mm.

[0013] In an optional embodiment, a water guiding groove is arranged on the foil and communicates with the through hole, and the water guiding groove is used to guide water to the through hole.

[0014] In an optional embodiment, the water guiding groove comprises at least one first water guiding groove and at least one second water guiding groove, and at least one of the first water guiding groove and the second water guiding groove communicates with the through hole.

[0015] In an optional embodiment, the first water guiding groove extends from top to bottom, and the second water guiding groove comprises a first water guiding part and a second water guiding part at an angle; when the second water guiding groove communicates with the through hole, the first water guiding part and / or the second water guiding part communicate with the through hole.

[0016] In an optional embodiment, the first water guiding groove communicates with the through hole located on the same straight line; when the number of the first water guiding grooves is plural, at least one of the first water guiding grooves communicates with the through hole located on the same straight line, and at least one of the first water guiding grooves communicates with the second water guiding groove.

[0017] In an optional embodiment, the number of the through holes comprises plural, the number of the second water guiding grooves corresponds to the number of the through holes, and the second water guiding grooves communicate with the through holes one by one.

[0018] In an optional embodiment, the second water guide grooves adjacent in left and right are communicated or not communicated, and the second water guide grooves adjacent in up and down are communicated through the first water guide groove.

[0019] In an optional embodiment, the through holes are arranged in multiple columns, and at least one first water guide groove is arranged between two adjacent columns of the through holes, and the second water guide groove is communicated with the first water guide groove, and the first water guide grooves in the same column are all communicated with the same first water guide groove.

[0020] In an optional embodiment, the heat exchange coil comprises at least one group of first coils and at least one group of second coils, the first coils are used for circulating refrigerant, the second coils are used for circulating chilled water, the inlet of the first coil is connected with the exhaust port of the compressor, the outlet of the first coil is connected with the first port of the throttling mechanism, the inlet of the second coil is connected with the return water port of the chilled water, and the outlet of the second coil is connected with the outlet port of the chilled water; the fan is used for driving gas to flow along the second coil to the first coil; when the compressor works, the water spraying device sprays water to the first coil; when the compressor does not work, the water spraying device sprays water to the second coil.

[0021] In an optional embodiment, the heat exchange coil comprises multiple groups, and the multiple groups of heat exchange coils comprise at least one group of first coils and at least one group of second coils, the first coils and the second coils are arranged in regions, or the first coils and the second coils are arranged in an interlaced manner.

[0022] The first coils are used for circulating refrigerant, the second coils are used for circulating chilled water, the inlet of the first coil is connected with the exhaust port of the compressor, the outlet of the first coil is connected with the first port of the throttling mechanism, the inlet of the second coil is connected with the return water port of the chilled water, and the outlet of the second coil is connected with the outlet port of the chilled water.

[0023] In a second aspect, the present application provides a control method of an air conditioning unit, which is used for controlling the air conditioning unit as described in any one of the preceding embodiments, and the control method comprises the following steps:

[0024] obtaining a control parameter, wherein the control parameter comprises environmental temperature data, a compressor capacity coefficient or exhaust temperature data;

[0025] controlling the working state of the water pump according to the control parameter, wherein the working state of the water pump comprises the rotating speed of the water pump.

[0026] In an optional embodiment, when the control parameter comprises the exhaust temperature data, the step of controlling the working state of the water pump according to the control parameter comprises:

[0027] determining whether the exhaust temperature data is greater than a first preset exhaust temperature or less than a second preset exhaust temperature;

[0028] if the exhaust temperature data is greater than the first preset exhaust temperature, controlling the water pump to increase;

[0029] if the exhaust temperature data is less than the second preset exhaust temperature, controlling the water pump to decrease;

[0030] if the exhaust temperature data is less than or equal to the first preset exhaust temperature and greater than or equal to the second preset exhaust temperature, controlling the water pump to maintain a current working state.

[0031] In an optional embodiment, when the control parameter comprises the exhaust temperature data and the ambient temperature data, the step of controlling the working state of the water pump according to the control parameter comprises:

[0032] obtaining the control parameter according to a first calculation formula, wherein the first calculation formula is:

[0033] T1=a1*Ta+a2*Td

[0034] wherein T1 is the control parameter, Ta is the ambient temperature data, Td is the exhaust temperature data, and a1 and a2 are constants;

[0035] determining whether the control parameter is greater than a first preset control temperature or less than a second preset control temperature;

[0036] if the control parameter is greater than the first preset control temperature, controlling the water pump to increase;

[0037] if the control parameter is less than the second preset control temperature, controlling the water pump to decrease;

[0038] if the control parameter is less than or equal to the first preset control temperature and greater than or equal to the second preset control temperature, controlling the water pump to maintain a current working state.

[0039] In an optional embodiment, when the control parameter comprises the compressor capacity coefficient and the ambient temperature data, the step of controlling the working state of the water pump according to the control parameter comprises:

[0040] obtaining the control parameter according to a second calculation formula, wherein the second calculation formula is:

[0041] Y=b1*Fc*Ta+b2*Ta+b3*Fc

[0042] Wherein, Y is the control parameter, Ta is the ambient temperature data, Fc is the compressor capacity coefficient, b1, b2 are constants;

[0043] determining whether the control parameter is greater than a first preset value or less than a second preset value;

[0044] If the control parameter is greater than the first preset value, the water pump is controlled to increase;

[0045] If the control parameter is less than the second preset value, the water pump is controlled to decrease;

[0046] If the control parameter is less than or equal to the first preset value and greater than or equal to the second preset value, the water pump is controlled to maintain the current working state.

[0047] In an optional embodiment, the control method further comprises a start-up control step; and / or, a shutdown control step;

[0048] The start-up control step comprises:

[0049] receiving a start-up command, and sequentially starting the water pump, the throttling mechanism and the compressor;

[0050] obtaining reference data, wherein the reference data comprises at least one of water temperature, condensing temperature, condensing pressure, compressor capacity coefficient, exhaust temperature or air temperature;

[0051] controlling the working state of the fan according to the reference data;

[0052] The shutdown control step comprises:

[0053] receiving a shutdown command, and sequentially shutting down the compressor, the throttling mechanism and the fan;

[0054] controlling the water pump to operate at maximum capacity;

[0055] after a first preset time, starting the fan and shutting down the water pump;

[0056] after a second preset time, shutting down the fan.

[0057] The beneficial effects of the embodiment of the present application are: through foil water guide, the water film of the heat exchange pipe is fully covered, better evaporation type condensation heat exchange effect is realized, the full coverage design of the water film on the foil further improves the heat exchange efficiency of the foil, the heat exchange efficiency of the heat exchanger of the embodiment is higher, and the air resistance is further reduced, so that the overall energy efficiency ratio of the air conditioning unit is higher, and the operation is more energy-saving. In addition, due to the full coverage of the water film, the risk of scale formation on the surface of the heat exchanger is further reduced, the service life of the product is prolonged, and the corrosion problem of the general copper pipe aluminum fin under the working condition of spraying water is also improved. BRIEF DESCRIPTION OF DRAWINGS

[0058] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0059] Figure 1 The structural schematic diagram of the air conditioning unit provided by the embodiment of the present application is shown in the figure.

[0060] Figure 2 The structural schematic diagram of the first heat exchanger provided by the embodiment of the present application is shown in the figure.

[0061] Figure 3 The structural schematic diagram of the first heat exchanger provided by the embodiment of the present application is shown in the figure.

[0062] Figure 4 The structural schematic diagram of the first water guide groove provided by the embodiment of the present application is shown in the figure.

[0063] Figure 5 The structural schematic diagram of the first water guide groove provided by the embodiment of the present application is shown in the figure.

[0064] Figure 6 The structural schematic diagram of the second water guide groove provided by the embodiment of the present application is shown in the figure.

[0065] Figure 7 The structural schematic diagram of another type of second water guide groove connected with the through hole provided by the embodiment of the present application is shown in the figure.

[0066] Figure 8 The structural schematic diagram of the second water guide groove provided by the embodiment of the present application is shown in the figure.

[0067] Figure 9 The structural schematic diagram of the third water guide groove provided by the embodiment of the present application is shown in the figure.

[0068] Figure 10 The structural schematic diagram of the fourth water guide groove provided by the embodiment of the present application is shown in the figure.

[0069] Figure 11 A fifth structure diagram of the water guide groove according to an embodiment of the present application is provided;

[0070] Figure 12 A sixth structure diagram of the water guide groove according to an embodiment of the present application is provided;

[0071] Figure 13 A seventh structure diagram of the water guide groove according to an embodiment of the present application is provided;

[0072] Figure 14 An eighth structure diagram of the water guide groove according to an embodiment of the present application is provided;

[0073] Figure 15 A flowchart of a control method of an air conditioning unit according to an embodiment of the present application is provided;

[0074] Figure 16 A flowchart of a sub-step of step S200 in Figure 15 is provided;

[0075] Figure 17 A flowchart of another sub-step of step S200 in Figure 15 is provided;

[0076] Figure 18 A flowchart of still another sub-step of step S200 in Figure 15 is provided;

[0077] Figure 19 A flowchart of a start-up control method of an air conditioning unit according to an embodiment of the present application is provided;

[0078] Figure 20 A flowchart of a shut-down control method of an air conditioning unit according to an embodiment of the present application is provided.

[0079] Legend: 100-air conditioning unit; 110-compressor; 120-first heat exchanger; 121-heat exchange coil; 122-foil; 1221-through hole; 123-water guide groove; 1231-first water guide groove; 1232-second water guide groove; 1233-first water guide part; 1234-second water guide part; 130-second heat exchanger; 140-throttling mechanism; 150-water pump; 160-fan; 170-water pan; 180-water spraying device. DETAILED DESCRIPTION

[0080] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0081] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0082] It should be noted that similar reference numerals and letters in the following drawings represent similar items, and therefore, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.

[0083] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present application is usually placed, and are merely for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0084] In addition, the terms "horizontal", "vertical" and the like do not mean that the components must be absolutely horizontal or vertical, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0085] In the description of the present application, it should also be noted that unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0086] Please refer to Figure 1The embodiment of the present application provides an air conditioning unit 100. The air conditioning unit 100 has good heat dissipation effect.

[0087] In the embodiment of the present application, the air conditioning unit 100 comprises a compressor 110, a first heat exchanger 120, a second heat exchanger 130, a throttling mechanism 140, a water pump 150, a fan 160, a water collecting tray 170 and a water spraying device 180.

[0088] The exhaust port of the compressor 110 is connected with the inlet of the first heat exchanger 120, the outlet of the first heat exchanger 120 is connected with the first port of the throttling mechanism 140, the second port of the throttling mechanism 140 is connected with the inlet of the second heat exchanger 130, and the outlet of the second heat exchanger 130 is connected with the suction port of the compressor 110.

[0089] The water collecting tray 170 is arranged below the first heat exchanger 120, the water collecting tray 170 is connected with a pipeline of the water spraying device 180, and the water pump 150 is connected with the pipeline, so as to transport the water in the water collecting tray 170 to the water spraying device 180, so that the water spraying device 180 sprays water to the surface of the first heat exchanger 120, and the fan 160 is used for driving the gas near the surface of the first heat exchanger 120 to flow.

[0090] Please refer to Figure 2 and Figure 3 The first heat exchanger 120 can comprise heat exchange coils 121 and multiple groups of foil sheets 122, the foil sheet 122 is provided with a through hole 1221, the heat exchange coil 121 passes through the through hole 1221 and is connected with the foil sheet 122, the part of the heat exchange coil 121 passing through the foil sheet 122 is perpendicular to the plane of the foil sheet 122, the heat exchange coil 121 has an inlet and an outlet, the inlet of the heat exchange coil 121 is connected with the exhaust port of the compressor 110, the outlet of the heat exchange coil 121 is connected with the first port of the throttling mechanism 140, and the air duct is formed between the adjacent two groups of foil sheets 122. The fan 160 can blow air to the air duct, so as to take away the heat on the foil sheets 122 on both sides of the air duct.

[0091] Optionally, the distance between the adjacent two groups of foil sheets 122 is at least 8 mm, so as to ensure the air volume of the foil sheet 122. Of course, it is not limited to this, and in the embodiment of the present application, the distance between the adjacent two groups of foil sheets 122 can also be other values.

[0092] The heat exchange tube can be a stainless steel tube or a carbon steel tube. For example, the heat exchange tube 121 comprises a stainless steel tube, the foil 122 comprises a stainless steel foil or an aluminum foil, and the heat exchange tube 121 is connected to the through hole 1221 by tube expansion. Alternatively, the heat exchange tube 121 comprises a carbon steel tube, the foil 122 comprises a steel foil, and the carbon steel tube and the foil 122 are filled with a zinc layer, a graphene coating or a nano coating. Of course, a positioning structure can also be provided, which includes but is not limited to positioning rods, clamping grooves and the like. In addition, the heat exchange tube can also be a copper tube, in which case the foil 122 comprises a steel foil or an aluminum foil or a stainless steel foil, and the heat exchange tube 121 is connected to the through hole 1221 by tube expansion.

[0093] Referring to Figure 4 In an optional embodiment, the foil 122 is provided with a water guide groove 123 in communication with the through hole 1221, and the water guide groove 123 is used to guide water to the through hole 1221. After the water spraying device 180 sprays water to the first heat exchanger 120, the water guide groove 123 guides water to the position of the through hole 1221 on the foil 122, which is conducive to the guidance of water and improves the heat conduction effect.

[0094] Referring to Figure 5 and Figure 6 In an optional embodiment, the water guide groove 123 described above can comprise at least one first water guide groove 1231 and at least one second water guide groove 1232, at least one of the first water guide groove 1231 and the second water guide groove 1232 being in communication with the through hole 1221. That is, the water guide groove 123 can be composed of at least two parts, wherein the first water guide groove 1231 extends from top to bottom, and the second water guide groove 1232 generally comprises a first water guide part 1233 and a second water guide part 1234 at an angle. When the second water guide groove 1232 is in communication with the through hole 1221, the first water guide part 1233 and / or the second water guide part 1234 are in communication with the through hole 1221.

[0095] It should be noted that the connection mode between the second water guide groove 1232 and the through hole 1221 can refer to Figure 6 and Figure 7 In Figure 6 , the intersection position of the first water guide part 1233 and the second water guide part 1234 is generally opposite to the through hole 1221, and the first water guide part 1233 and the second water guide part 1234 generally form an "X" shape. In Figure 7In the embodiment, the four ends of the first water guide part 1233 and the second water guide part 1234 are communicated with one through hole 1221, at this time, the through holes 1221 in the same column can also be communicated with the first water guide groove 1231, or the first water guide groove 1231 is arranged between the left and right adjacent through holes 1221, and the first water guide groove 1231 is connected with the intersection position of the first water guide part 1233 and the second water guide part 1234.

[0096] As shown in Figure 4 , Figure 5 , the first water guide groove 1231 is communicated with the through hole 1221 in the same straight line; when the number of the first water guide groove 1231 is more than one, at least one first water guide groove 1231 is communicated with the through hole 1221 in the same straight line, and at least one first water guide groove 1231 is communicated with the second water guide groove 1232.

[0097] In the optional embodiment, as shown in Figure 4 , the number of the through hole 1221 includes multiple, the number of the second water guide groove 1232 corresponds to the number of the through hole 1221, and the second water guide groove 1232 is communicated with the through hole 1221 one by one.

[0098] It should be noted that in the embodiment of the present application, the first water guide groove 1231 and the second water guide groove 1232 described above can be combined in any way, including various numbers, various positions and various position relationships. For example, please refer to Figures 8 to 14 , which will be described below.

[0099] Please refer to Figure 8 , which shows a column with three through holes 1221, wherein the first water guide groove 1231 is arranged in three, the second water guide groove 1232 is arranged in three up and down, the intersection position of the first water guide part 1233 and the second water guide part 1234 of the second water guide groove 1232 is basically coincided with the through hole 1221, the first water guide groove 1231 in the middle position is connected with the three through holes 1221 respectively, and the two first water guide grooves 1231 on both sides are connected with the second water guide groove 1232 correspondingly.

[0100] Please refer to Figure 9 , which increases one first water guide groove 1231 on both sides compared with Figure 8 .

[0101] Please refer to Figure 10 , which shows the relationship between the water guide groove 123 and the through hole 1221, compared with Figure 8 , Figure 10 , one first water guide groove 1231 is less, and the multiple second water guide grooves 1232 arranged side by side are communicated with the first water guide groove 1231 on the left side.

[0102] Please refer toFigure 11 , and Figure 10 A first water guide groove 1231 is additionally arranged on the left side.

[0103] Please refer to Figure 12 , Figure 13 and Figure 14 In optional embodiments, left and right adjacent second water guide grooves 1232 are communicated or not communicated, and upper and lower adjacent second water guide grooves 1232 are communicated through the first water guide groove 1231. Figure 12 In the third embodiment, upper and lower adjacent second water guide grooves 1232 are communicated through the first water guide groove 1231, and left and right adjacent second water guide grooves 1232 are communicated through the first water guide groove 1231. Figure 13 In the fourth embodiment, upper and lower adjacent second water guide grooves 1232 are communicated through the first water guide groove 1231, and left and right adjacent second water guide grooves 1232 are not communicated. Figure 14 In the fifth embodiment, upper and lower adjacent second water guide grooves 1232 are communicated through the first water guide groove 1231, and left and right adjacent second water guide grooves 1232 are not communicated.

[0104] In the embodiments of the present application, the water guide groove 123 is arranged as described above, so that the water can fully cover the foil 122, and more water is guided to the heat exchange coil 121, so that the water film fully covers the heat exchange coil 121.

[0105] In optional embodiments, the through holes 1221 are arranged in multiple columns, at least one first water guide groove 1231 is arranged between adjacent two columns of through holes 1221, the second water guide groove 1232 is communicated with the first water guide groove 1231, and the first water guide grooves 1231 located in the same column are all communicated with the same first water guide groove 1231.

[0106] In addition, the second heat exchanger 130 can be in water cooling form or in air cooling form. The embodiments of the present application do not have specific requirements for the specific structure form of the second heat exchanger 130.

[0107] In optional embodiments, the heat exchange coil 121 includes at least one group of first coils and at least one group of second coils, the first coils are used for flowing refrigerant, the second coils are used for flowing chilled water, the inlet of the first coil is connected with the exhaust port of the compressor 110, the outlet of the first coil is connected with the first port of the throttling mechanism 140, the inlet of the second coil is connected with the water return port of the chilled water, and the outlet of the second coil is connected with the water outlet port of the chilled water; the fan 160 is used for driving the gas to flow along the second coil to the first coil; when the compressor 110 works, the water spraying device 180 sprays water to the first coil; when the compressor 110 does not work, the water spraying device 180 sprays water to the second coil.

[0108] It should be noted that the heat exchange coil 121 can have multiple groups, and each group of heat exchange coil 121 is independent of each other, that is, the refrigerant or chilled water in each heat exchange coil 121 will not flow into each other. In the embodiment of the present application, the first coil is defined for the flow of refrigerant, and the second coil is defined for the flow of chilled water. The first coil and the second coil can be arranged in different areas, such as the first coil is located below or above, left or right of the second coil, etc.; and the first coil and the second coil can also be arranged in staggered manner, such as in some embodiments, the heat exchange coil 121 is arranged in the following arrangement: … first coil, second coil, first coil, second coil … and so on. Of course, other staggered arrangement methods can also be used.

[0109] In the embodiment of the present application, when the compressor 110 is working, the refrigerant flows in the first coil, and heat exchange can be achieved by the refrigerant. At this time, the water spraying device 180 sprays water to the first coil. When the compressor 110 is not working, the refrigerant does not flow, at this time, the chilled water can flow in the second coil to achieve heat exchange; the fan 160 makes the gas flow from the second coil to the first coil, and the water spraying device 180 sprays water to the second coil. Under the action of the fan 160, the gas flowing to the first coil also contains a large amount of water, which can reduce the dew point temperature of the air near the first coil when flowing to the first coil, thereby helping the heat exchange of the first coil.

[0110] The air conditioning unit 100 provided by the embodiment of the present application: the water spraying device 180 can spray water to the foil 122, the foil 122 is connected with the heat exchange coil 121, and the water sprayed by the water spraying device 180 can basically completely cover the surface of the foil 122; at the same time, the foil 122 guides the water to the surface of the heat exchange coil 121, so that the heat exchange coil 121 can basically fully distribute water, and the heat exchange coil 121 can exchange heat with the water film on the surface thereof. Further, the fan 160 can directly drive the surface water to evaporate, thereby improving the heat exchange efficiency. Further, the water film on the surface of the foil 122 is basically fully covered, which can improve the heat exchange efficiency of the foil 122, and improve the problem of unstable water film of the conventional evaporative condenser, so that the air conditioning unit 100 has higher energy efficiency ratio. The corrosion problem of the general copper tube and aluminum fin under the working condition of spraying water can also be improved.

[0111] Please refer to Figure 15 The present application provides a control method of the air conditioning unit 100, which is used for controlling the air conditioning unit 100 as described in any one of the preceding embodiments, and the control method comprises the following steps.

[0112] Step S100: acquiring control parameters. The control parameters include at least one of the ambient temperature data, the compressor 110 capacity coefficient and the exhaust temperature data.

[0113] Step S200: controlling the working state of the water pump 150 according to the control parameter. The working state of the water pump 150 includes rotating speed, power, etc., and reflects the start-stop of operation or the size of water supply.

[0114] It should be noted that, in the embodiment of the present application, the risk of scale formation is reduced by controlling the exhaust temperature; at the same time, the water pump 150 is adjusted by controlling the exhaust temperature, thereby affecting the operation state of the compressor 110, so that the total power consumption of the compressor 110, the water pump 150 and the cooling fan 160 is further reduced, and the purpose of improving the energy efficiency ratio of the overall air conditioning unit 100 is achieved.

[0115] Please refer to Figure 16 When the control parameter includes the exhaust temperature data, the step of controlling the working state of the water pump 150 according to the control parameter includes:

[0116] Step S211: judging whether the exhaust temperature data is greater than a first preset exhaust temperature or less than a second preset exhaust temperature;

[0117] Step S212: if the exhaust temperature data is greater than the first preset exhaust temperature, controlling the water pump 150 to increase;

[0118] Step S213: if the exhaust temperature data is less than the second preset exhaust temperature, controlling the water pump 150 to decrease;

[0119] Step S214: if the exhaust temperature data is less than or equal to the first preset exhaust temperature and greater than or equal to the second preset exhaust temperature, controlling the water pump 150 to keep the current working state.

[0120] Please refer to Figure 17 When the control parameter includes the exhaust temperature data and the ambient temperature data, the step of controlling the working state of the water pump 150 according to the control parameter includes:

[0121] Step S221: obtaining the control parameter according to a first calculation formula, wherein the first calculation formula is:

[0122] T1=a1*Ta+a2*Td

[0123] Wherein, T1 is the control parameter, Ta is the ambient temperature data, Td is the exhaust temperature data, a1 and a2 are constants;

[0124] Step S222: judging whether the control parameter is greater than a first preset control temperature or less than a second preset control temperature;

[0125] Step S223: if the control parameter is greater than the first preset control temperature, controlling the water pump 150 to increase;

[0126] Step S224: If the control parameter is less than the second preset control temperature, control the water pump 150 to reduce;

[0127] Step S225: If the control parameter is less than or equal to the first preset control temperature and greater than or equal to the second preset control temperature, control the water pump 150 to keep the current working state.

[0128] The above steps can reduce the risk of scale formation by controlling the exhaust temperature, and adjust the water pump 150 by controlling the exhaust temperature, thereby affecting the operating state of the compressor 110, so that the total power consumption of the compressor 110, the water pump 150 and the cooling fan 160 is further reduced, and the purpose of improving the energy efficiency ratio of the overall air conditioning unit 100 is achieved.

[0129] Please refer to Figure 18 When the control parameter includes the compressor 110 capacity coefficient and the ambient temperature data, the step of controlling the working state of the water pump 150 according to the control parameter includes:

[0130] Step S231: Obtain the control parameter according to the second calculation formula, wherein the second calculation formula is:

[0131] Y = b1*Fc*Ta + b2*Ta + b3*Fc

[0132] Wherein Y is the control parameter, Ta is the ambient temperature data, Fc is the compressor 110 capacity coefficient, b1 and b2 are constants;

[0133] Step S232: Determine whether the control parameter is greater than the first preset value or less than the second preset value;

[0134] Step S233: If the control parameter is greater than the first preset value, control the water pump 150 to increase;

[0135] Step S234: If the control parameter is less than the second preset value, control the water pump 150 to reduce;

[0136] Step S235: If the control parameter is less than or equal to the first preset value and greater than or equal to the second preset value, control the water pump 150 to keep the current working state.

[0137] In the above steps, the risk of scale formation is reduced by controlling the exhaust temperature; at the same time, the water pump 150 is adjusted by controlling the exhaust temperature, thereby affecting the operating state of the compressor 110, so that the total power consumption of the compressor 110, the water pump 150 and the cooling fan 160 is further reduced, and the purpose of improving the energy efficiency ratio of the overall air conditioning unit 100 is achieved.

[0138] Please refer to Figure 19 and Figure 20 In an optional embodiment, the control method further includes: a start-up control step; and / or, a shutdown control step;

[0139] Referring to Figure 19 , the start-up control step comprises:

[0140] Step S10: receiving a start-up command, sequentially starting the water pump 150, the throttling mechanism 140, and the compressor 110;

[0141] Step S20: obtaining reference data, wherein the reference data comprises at least one of water temperature, condensing temperature, condensing pressure, compressor 110 capacity coefficient, discharge temperature, or air temperature;

[0142] Step S30: controlling the working state of the fan 160 according to the reference data.

[0143] The above-mentioned start-up control step can make the start-up more stable and reliable, and is conducive to ensuring stable start-up.

[0144] Referring to Figure 20 , the shutdown control step comprises:

[0145] Step S1: receiving a shutdown command, sequentially shutting down the compressor 110, the throttling mechanism 140, and the fan 160;

[0146] Step S2: controlling the water pump 150 to operate at maximum capacity;

[0147] Step S3: after a first preset time, starting the fan 160 and shutting down the water pump 150;

[0148] Step S4: after a second preset time, shutting down the fan 160.

[0149] In the above-mentioned shutdown step, the start-stop of the water pump 150 and the fan 160 reduces the influence of capillary phenomenon of the water film, reduces the risk of scale formation of the final water film on the foil 122 and the heat exchange pipe, and can improve the use energy efficiency and service life of the product.

[0150] The air conditioning unit 100 and the control method thereof provided by the embodiment of the present application: the water spraying device 180 can spray water on the foil 122, the foil 122 is connected with the heat exchange coil 121, the water sprayed by the water spraying device 180 can basically completely cover the surface of the foil 122; at the same time, the foil 122 guides the water to the surface of the heat exchange coil 121, so that the heat exchange coil 121 can basically fully distribute water, and the heat exchange coil 121 and the water film on the surface thereof can realize heat exchange. Further, the fan 160 can directly drive the surface water to evaporate, thereby improving the heat exchange efficiency. Further, the water film on the surface of the foil 122 is basically fully covered, which can improve the heat exchange efficiency of the foil 122, and improves the problem of unstable water film of the conventional evaporative condenser, so that the air conditioning unit 100 has higher energy efficiency ratio. The corrosion problem of the general copper pipe aluminum fin under the working condition of spraying water can also be improved. The embodiment of the present application adopts the mode of distributing water through the foil 122 and guiding to the heat exchange pipe, which better solves the problem of water distribution, improves the heat exchange area, and improves the heat exchange effect of the evaporative condenser.

[0151] The above only is the preferred embodiment of the present application, and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. An air conditioning unit, comprising: The air conditioner comprises a compressor (110), a first heat exchanger (120), a second heat exchanger (130), a throttling mechanism (140), a water pump (150), a fan (160), a water pan (170) and a water spraying device (180); An exhaust port of the compressor (110) is connected with an inlet of the first heat exchanger (120), an outlet of the first heat exchanger (120) is connected with a first port of the throttling mechanism (140), a second port of the throttling mechanism (140) is connected with an inlet of the second heat exchanger (130), and an outlet of the second heat exchanger (130) is connected with a suction port of the compressor (110); The water pan (170) is arranged below the first heat exchanger (120), the water pan (170) is connected with a pipeline of the water spraying device (180), and the water pump (150) is connected with the pipeline to transport water in the water pan (170) to the water spraying device (180) to make the water spraying device (180) spray water on the surface of the first heat exchanger (120), and the fan (160) is used to drive the gas near the surface of the first heat exchanger (120) to flow; The first heat exchanger (120) comprises heat exchange coils (121) and multiple groups of foils (122), the foils (122) are provided with through holes (1221), the heat exchange coils (121) pass through the through holes (1221) and are connected with the foils (122), the axis of the part of the heat exchange coils (121) passing through the foils (122) is perpendicular to the plane where the foils (122) are located, the heat exchange coils (121) have inlets and outlets, the inlets of the heat exchange coils (121) are connected with the exhaust port of the compressor (110), the outlets of the heat exchange coils (121) are connected with the first port of the throttling mechanism (140), and air ducts are formed between adjacent two groups of the foils (122); The heat exchange coils (121) comprise stainless steel pipes, the foils (122) comprise stainless steel foils or aluminum foils, and the stainless steel pipes are connected with the through holes (1221) through pipe expansion; or the heat exchange coils (121) comprise carbon steel pipes, the foils (122) comprise steel foils, and the carbon steel pipes and the foils (122) are filled with zinc layers, graphene coatings or nano coatings; Or the heat exchange coils (121) comprise copper pipes, the foils (122) comprise steel foils, aluminum foils or stainless steel foils, and the copper pipes are connected with the through holes (1221) through pipe expansion; Or the heat exchange coils (121) comprise carbon steel pipes, the foils (122) comprise stainless steel foils, aluminum foils or steel foils, and the carbon steel pipes are connected with the through holes (1221) through pipe expansion; The foils (122) are provided with water guide grooves (123) in communication with the through holes (1221), and the water guide grooves (123) are used to guide water to the through holes (1221). The water guide groove (123) comprises at least one first water guide groove (1231) and at least one second water guide groove (1232), the first water guide groove (1231) extends from top to bottom, and the second water guide groove (1232) comprises a first water guide part (1233) and a second water guide part (1234) at an included angle; the first water guide part (1233) and / or the second water guide part (1234) are in communication with the through hole (1221); The first water guide groove (1231) is in communication with the through hole (1221) located on the same straight line; when the number of the first water guide groove (1231) is plural, at least one first water guide groove (1231) is in communication with the through hole (1221) located on the same straight line, and at least one first water guide groove (1231) is in communication with the second water guide groove (1232); The number of the through hole (1221) is plural, the number of the second water guide groove (1232) corresponds to the number of the through hole (1221), and the second water guide groove (1232) is in one-to-one correspondence with the through hole (1221); the through hole (1221) is arranged in multiple columns, at least one first water guide groove (1231) is arranged between adjacent two columns of the through hole (1221), the second water guide groove (1232) is in communication with the first water guide groove (1231), and the second water guide grooves (1232) located in the same column are in communication with the same first water guide groove (1231).

2. The air conditioning unit of claim 1, wherein The heat exchange coil (121) comprises at least one group of first coils and at least one group of second coils, wherein the first coils are used for flowing refrigerant, the second coils are used for flowing chilled water, the inlet of the first coil is connected with the exhaust port of the compressor (110), the outlet of the first coil is connected with the first port of the throttling mechanism (140), the inlet of the second coil is connected with the return water port of the chilled water, and the outlet of the second coil is connected with the outlet port of the chilled water; The fan (160) is used for driving gas to flow along the second coil to the first coil; When the compressor (110) works, the water spraying device (180) sprays water to the first coil; When the compressor (110) does not work, the water spraying device (180) sprays water to the second coil.

3. The air conditioning unit of claim 1, wherein The heat exchange coil (121) comprises multiple groups, and the multiple groups of heat exchange coils (121) comprise at least one group of first coils and at least one group of second coils, the first coils and the second coils are arranged in regions, or the first coils and the second coils are arranged in an interlaced manner; The first coils are used for flowing refrigerant, the second coils are used for flowing chilled water, the inlet of the first coil is connected with the exhaust port of the compressor (110), the outlet of the first coil is connected with the first port of the throttling mechanism (140), the inlet of the second coil is connected with the return water port of the chilled water, and the outlet of the second coil is connected with the outlet port of the chilled water.

4. A control method of an air conditioning pack for controlling the air conditioning pack according to any one of claims 1 to 3, characterized by, The control method comprises: obtaining a control parameter, wherein the control parameter comprises at least one of ambient temperature data, compressor (110) capacity coefficient and discharge temperature data; controlling the working state of the water pump (150) according to the control parameter, wherein the working state of the water pump (150) comprises the rotating speed of the water pump (150).

5. The control method of an air conditioning unit according to claim 4, characterized by, When the control parameter comprises the discharge temperature data, the step of controlling the working state of the water pump (150) according to the control parameter comprises: judging whether the discharge temperature data is greater than a first preset discharge temperature or less than a second preset discharge temperature; if the discharge temperature data is greater than the first preset discharge temperature, controlling the water pump (150) to increase; if the discharge temperature data is less than the second preset discharge temperature, controlling the water pump (150) to decrease; if the discharge temperature data is less than or equal to the first preset discharge temperature and greater than or equal to the second preset discharge temperature, controlling the water pump (150) to keep the current working state.

6. The control method of an air conditioning unit according to claim 4, wherein When the control parameter comprises the discharge temperature data and the ambient temperature data, the step of controlling the working state of the water pump (150) according to the control parameter comprises: obtaining the control parameter according to a first calculation formula, wherein the first calculation formula is: T1=a1*Ta+a2*Td wherein T1 is the control parameter, Ta is the ambient temperature data, Td is the discharge temperature data, and a1 and a2 are constants; judging whether the control parameter is greater than a first preset control temperature or less than a second preset control temperature; if the control parameter is greater than the first preset control temperature, controlling the water pump (150) to increase; if the control parameter is less than the second preset control temperature, controlling the water pump (150) to decrease; if the control parameter is less than or equal to the first preset control temperature and greater than or equal to the second preset control temperature, controlling the water pump (150) to keep the current working state.

7. The control method of an air conditioning unit according to claim 4, wherein When the control parameter comprises the compressor (110) capacity coefficient and the ambient temperature data, the step of controlling the working state of the water pump (150) according to the control parameter comprises: obtaining the control parameter according to a second calculation formula, wherein the second calculation formula is: Y=b1*Fc*Ta+b2*Ta+b3*Fc wherein Y is the control parameter, Ta is the ambient temperature data, Fc is the compressor (110) capacity coefficient, and b1 and b2 are constants; judging whether the control parameter is greater than a first preset value or less than a second preset value; if the control parameter is greater than the first preset value, controlling the water pump (150) to increase; if the control parameter is less than the second preset value, controlling the water pump (150) to decrease; if the control parameter is less than or equal to the first preset value and greater than or equal to the second preset value, controlling the water pump (150) to keep the current working state.

8. The control method of an air conditioning unit according to any one of claims 4-7, characterized by, The control method further comprises a start-up control step and / or a shutdown control step; the start-up control step comprises: receiving a start command, and sequentially starting the water pump (150), the throttling mechanism (140) and the compressor (110); obtaining reference data, wherein the reference data comprises at least one of water temperature, condensing temperature, condensing pressure, compressor (110) capacity coefficient, discharge temperature or air temperature; controlling the working state of the fan (160) according to the reference data; the shutdown control step comprises: receiving a shutdown command, and sequentially stopping the compressor (110), the throttling mechanism (140) and the fan (160); controlling the water pump (150) to run at maximum capacity; after a first preset time, starting the fan (160) and stopping the water pump (150); after a second preset time, stopping the fan (160).

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