Air-cooled air conditioner of modular design

Abstract

This invention belongs to the field of air-cooled air conditioning technology, and particularly relates to a modularly designed air-cooled air conditioner, including a compressor, condenser, circulating pump, cooling tower, expansion valve, evaporator, and air-cooled heat exchanger. The evaporator is designed for sequential expansion through multiple sequential connections. These multiple connected evaporators are connected to a main pipeline for water or refrigerant via the first evaporator. The first heat exchange tube within the evaporator, serving as a refrigerant flow channel, is designed to separate the gas and liquid components when the refrigerant is in a gas-liquid coexisting state. The modular design of the air-cooled heat exchanger in this invention allows for adjusting the number of heat exchangers to meet the cold air volume requirements within the workspace, offering high scalability. Simultaneously, the drum fan assembly in the air-cooled heat exchanger effectively reduces the airflow carried away by the high-speed rotating fan at the air outlet by the blades, effectively improving the overall airflow efficiency of the air-cooled heat exchanger.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of air-cooled air conditioners, and particularly relates to an air-cooled air conditioner with modular design. BACKGROUND

[0002] Large places or data center cabinets or DC warehouses often need refrigeration, which is generally achieved by central air conditioning to cool the internal environment of large places or data center cabinets or DC warehouses. Figure 25 As shown in the figure, the refrigeration system of the central air conditioner includes a chilled water circulation, a refrigeration cycle and a cooling water circulation, and the patent with application number 202410904297.8 discloses this technology.

[0003] The increase of refrigeration space or the increase of the refrigeration space is a factor that needs to be considered for the expandability of the central air conditioner in the later stage. In order to make the central air conditioner have greater expandability after installation, large compressors, evaporators and condensers need to be selected during installation. Even if large compressors, evaporators and condensers are selected, the central air conditioner will still have the problem of low energy efficiency in the early stage of operation due to the idle running of the refrigeration equipment caused by the fact that the refrigeration unit is much larger than the refrigeration capacity demand. Therefore, there is an inevitable contradiction between expandability and low energy efficiency.

[0004] The evaporator or condenser in the refrigeration system is a component for gas-liquid conversion of the refrigerant. When the refrigerant in the evaporator or condenser coexists in gas and liquid, the flow efficiency of the refrigerant is reduced. The gaseous refrigerant will be blocked by the liquid refrigerant, and the liquid refrigerant will be pushed by the gaseous refrigerant to affect its vaporization. In short, the coexistence of gas and liquid in the pipe will affect the efficiency of refrigerant evaporation or condensation.

[0005] The air-cooled heat exchanger uses a drum fan to supply air. During the process of high-speed rotation of the drum fan for air supply, a small amount of air at the air outlet will be reversed to the air inlet along the blades on the impeller, thereby affecting the overall air supply efficiency. The blades of the impeller need to be further improved to improve the air supply efficiency.

[0006] The present application modularly designs the key components such as evaporator, condenser, expansion valve and air-cooled heat exchanger of the air-cooled air conditioning system, so as to effectively meet the expansion demand in the later stage and solve the contradiction between expandability and energy efficiency. SUMMARY

[0007] Based on this, it is necessary to provide a modular design of air-cooled air conditioner for the problems existing in the current air-cooled air conditioner, the adjusting rod for adjusting the size of the throttling port in the expansion valve is connected with the slider-crank mechanism formed by the eighth gear driven by the third rack to greatly reduce the movement amplitude ratio of the adjusting rod and the third rack when the throttling port is adjusted in a small flow, so that the accuracy of the adjusting rod in adjusting the throttling port in a small flow is realized, and when it is necessary to adjust the throttling port in a large flow, the limit movement of the adjusting rod is driven by the crank to meet the large flow adjustment of the throttling port, so that the later expansion demand of the whole refrigeration system is effectively met. The modular design of the evaporator in the application can ensure that the heat conduction area related to the gasification or liquefaction of the refrigerant can be flexibly changed according to the specific expansion demand, and to a certain extent, the contradiction between expandability and energy efficiency is solved. At the same time, the structure of the first heat exchange pipe in the evaporator in the application can improve the gasification efficiency of the refrigerant and the flow efficiency of the gaseous refrigerant by separating gas and liquid when the refrigerant coexists with the pipe. The modular design of the air-cooled heat exchanger in the application can meet the demand of the amount of cold air in the working space by increasing or decreasing the number of air-cooled heat exchangers, and the expandability is high. At the same time, the drum fan assembly in the air-cooled heat exchanger can effectively reduce the amount of air taken away by the leaf plate in the opposite direction with the drum fan assembly rotating at high speed at the air outlet, and effectively improve the overall air outlet efficiency of the air-cooled heat exchanger.

[0008] The above object is achieved by the following technical scheme:

[0009] A modular design of air-cooled air conditioner, comprising a compressor, a condenser, a circulating pump, a cooling tower, an expansion valve, an evaporator and an air-cooled heat exchanger, the evaporator has the characteristics of multiple sequential connection expansion, multiple connected evaporators are connected to the main pipe of water or refrigerant through the first evaporator at the front end, and the first heat exchange pipe in the evaporator for refrigerant flow channel has the characteristics of gas-liquid separation movement when the refrigerant is in the gas-liquid coexistence state.

[0010] The expansion valve has the characteristics of high-precision adjustment of the throttling port by reducing the transmission ratio of the step motor assembly and the adjusting rod in the expansion valve.

[0011] The drum fan assembly in the air-cooled heat exchanger has the characteristics of reducing the loss of cold quantity at the air outlet.

[0012] In one of the embodiments, the evaporator comprises a cuboid first shell, one end of the first shell is provided with a first water inlet pipe and a second water outlet pipe, the other end of the first shell is provided with a first water outlet pipe opposite to the first water inlet pipe and installed with a first switch valve, and a second water inlet pipe opposite to the second water outlet pipe and installed with a second switch valve, a group of first heat exchange pipes are arranged between the first water inlet pipe and the first water outlet pipe and between the second water inlet pipe and the second water outlet pipe, the two groups of first heat exchange pipes are isolated from each other by a partition plate, a water passage is formed in the partition plate near the first water outlet pipe, a first baffle is arranged at the water passage and opens and closes the water passage, the first water outlet pipe and the second water inlet pipe are respectively communicated with the first liquid outlet pipe and the second liquid inlet pipe through the first pipe network near the first water outlet pipe end of the two groups of first heat exchange pipes, the first three-way valve and the second three-way valve are respectively arranged on the first liquid outlet pipe and the second liquid inlet pipe, the first three-way valve is connected with the second three-way valve through a communication pipe, the valve shaft of the first three-way valve is rotatably arranged in a circular hole on the first shell and is in transmission connection with the valve shaft of the second three-way valve and the first baffle, the first liquid inlet pipe corresponding to the first liquid outlet pipe and the second liquid outlet pipe opposite to the second liquid inlet pipe are respectively connected with the first pipe network near the first water inlet pipe end of the two groups of first heat exchange pipes.

[0013] In one of the embodiments, the first heat exchange pipe comprises a refrigerant liquid pipe communicated with the first liquid outlet pipe and the first liquid inlet pipe or the second liquid inlet pipe and the second liquid outlet pipe at two ends, a communication groove is formed in the top pipe wall of the refrigerant liquid pipe, a refrigerant gas pipe communicated with the communication groove is arranged at the communication groove, a second baffle is arranged in the refrigerant gas pipe and shields the communication groove, and communication holes are uniformly formed in the two sides of the second baffle along the length direction of the second baffle.

[0014] In one of the embodiments, the end of the first water inlet pipe and the second water outlet pipe is respectively rotatably provided with a first screw sleeve and a fourth screw sleeve, the end of the first water outlet pipe and the second water inlet pipe is respectively provided with a second screw sleeve threadedly matched with the first screw sleeve on the adjacent first water inlet pipe and a third screw sleeve threadedly matched with the fourth screw sleeve on the adjacent second water outlet pipe, the end of the first water outlet pipe and the second water inlet pipe is respectively provided with a sealing gasket matched with the first water inlet pipe and the second water outlet pipe, the end of the first liquid inlet pipe and the second liquid outlet pipe is respectively rotatably provided with a sixth screw sleeve and an eighth screw sleeve, the end of the first liquid outlet pipe and the second liquid inlet pipe is respectively provided with a fifth screw sleeve threadedly matched with the sixth screw sleeve on the adjacent first liquid inlet pipe and a seventh screw sleeve threadedly matched with the eighth screw sleeve on the adjacent second liquid outlet pipe, and the end of the first liquid outlet pipe and the second liquid inlet pipe is respectively provided with a sealing gasket matched with the first liquid inlet pipe and the second liquid outlet pipe.

[0015] In one of the embodiments, the first baffle is slidingly arranged in two guide rails on the partition plate, a first rack is arranged on the guide rails, the first rack is slidingly arranged in a first guide seat on the partition plate, the first rack is engaged with a first gear, the first gear is arranged on a shaft sleeve, the shaft sleeve is rotationally arranged on a first fixed shaft on the partition plate, a second gear with a smaller diameter than the first gear is arranged on the shaft sleeve, the second gear is engaged with a second rack slidingly arranged in a second guide seat on the partition plate, a third gear with a larger diameter than the second gear is arranged on a synchronous shaft rotationally arranged in the first housing and engaged with the second gear, the synchronous shaft is provided with a fourth gear and a seventh gear, the fourth gear and the seventh gear are respectively engaged with a fifth gear on a valve shaft of the first three-way valve and a sixth gear on a valve shaft of the second three-way valve.

[0016] In one of the embodiments, the expansion valve comprises a stepper motor assembly, an end of the stepper motor assembly is provided with a third housing, a first guide sleeve is arranged in the third housing, a screw driven by the stepper motor assembly is slidingly arranged in the first guide sleeve, a third rack is arranged at a lower end of the screw, the third rack is engaged with an eighth gear arranged in the third housing, a crank is arranged on an axle of the eighth gear, an end of the crank is hingedly connected with a connecting rod, a distal end of the connecting rod is hingedly connected with an adjusting rod, the adjusting rod is slidingly arranged in a second guide sleeve at a circular hole at an end of the third housing, an end of the second guide sleeve is provided with a third liquid outlet pipe, a throttle is arranged in the third liquid outlet pipe and adjusted by a tapered tip at an end of the adjusting rod, a third liquid inlet pipe is arranged on the third liquid outlet pipe, a communication port of the third liquid inlet pipe and the third liquid outlet pipe is located between the throttle and the second guide sleeve, an end of the third liquid outlet pipe is rotationally provided with a tenth screw sleeve, an end of the third liquid inlet pipe is provided with an eleventh screw sleeve threadedly matched with the tenth screw sleeve on a main pipeline, an end of the third liquid inlet pipe is provided with a sealing washer matched with the main pipeline.

[0017] In one of the embodiments, the stepper motor assembly comprises a second housing connected with the third housing and the first guide sleeve, a stator is arranged in the second housing, a rotor is rotationally arranged in the stator, a ninth screw sleeve threadedly connected with the screw is arranged in the rotor.

[0018] In one of the embodiments, the air-cooled heat exchanger comprises a fourth shell, two mounting cavities arranged at two ends of the fourth shell, an air inlet and an air outlet respectively arranged at two sides of the fourth shell, an upper arc wall and a lower arc wall respectively arranged at upper and lower sides of the fourth shell, a drum fan assembly arranged between the upper arc wall and the lower arc wall of the fourth shell and driven to rotate by a hollow shaft motor mounted on one end of the mounting cavity wall, a plurality of second heat exchange pipes densely arranged between the drum fan assembly and the lower arc wall, the two ends of the second heat exchange pipes being communicated with a third water inlet pipe and a third water outlet pipe through a second pipe network arranged in the corresponding end mounting cavity, a first branch pipe and a second branch pipe respectively arranged on the pipe wall of the third water inlet pipe and the third water outlet pipe and communicated with the third water inlet pipe and the third water outlet pipe, a third switch valve and a fourth switch valve respectively arranged on the first branch pipe and the second branch pipe, and a twelfth screw sleeve and a fourteenth screw sleeve respectively arranged at the end of the third water inlet pipe and the third water outlet pipe, and the end of the first branch pipe and the second branch pipe being respectively rotationally provided with a thirteenth screw sleeve threadedly matched with the twelfth screw sleeve on the adjacent third water inlet pipe and a fifteenth screw sleeve threadedly matched with the fourteenth screw sleeve on the adjacent third water outlet pipe.

[0019] In one of the embodiments, the drum fan assembly comprises two coaxial circular plates and a circular cylinder, one of the circular plates is arranged on the output shaft of the hollow shaft motor, a first ring sleeve is arranged at the center hole of the other circular plate, the first ring sleeve is rotationally arranged in a rotating seat in the corresponding side mounting cavity, the two circular plates are connected through a plurality of connecting rods uniformly distributed in the circumferential direction, a plurality of rotating shafts rotationally matched with the circular holes on the two circular plates are uniformly arranged in the circumferential direction between the two circular plates, a blade plate matched with the upper arc wall at the outer end of the rotating shaft is arranged on the rotating shaft, a vortex spring allowing the blade plate to expand is connected between the rotating shaft and the shaft seat on the circular plate, a second clamping block matched with the first clamping block on the corresponding shaft seat is arranged on the rotating shaft, the circular cylinder is eccentrically arranged between the two circular plates and matched with the inner end of the blade plate, the blade plate swings and contracts under the action of the circular cylinder when passing from the air inlet to the air outlet through the lower arc wall, and the blade plate swings and expands under the action of the circular cylinder when passing from the air outlet to the air inlet through the upper arc wall, two second ring sleeves are arranged at the two ends of the circular cylinder, the second ring sleeves are rotationally arranged on a second fixed shaft fixedly connected with the end wall of the fourth shell through a fixing rod and are in transmission connection with the output shaft of the hollow shaft motor, and the rotating direction of the circular cylinder is the same as the rotating direction of the circular plate.

[0020] In one of the embodiments, a ninth gear is arranged on the second ring sleeve, the ninth gear is meshed with a gear ring arranged in the third ring sleeve, and the third ring sleeve is arranged on the output shaft of the hollow shaft motor.

[0021] The beneficial effects of the present application are:

[0022] 1. The adjusting rod for adjusting the size of the throttling port in the expansion valve of the application greatly reduces the motion amplitude ratio of the adjusting rod to the third rack when the adjusting rod is used to adjust the throttling port in a small flow rate, so as to realize the accuracy of the adjusting rod in adjusting the throttling port in a small flow rate, and when it is necessary to adjust the throttling port in a large flow rate, the limit motion of the adjusting rod is driven by the crank to meet the large flow rate adjustment of the throttling port, so as to effectively meet the later expansion demand of the whole refrigeration system.

[0023] 2. The modular design of the evaporator in the application can ensure that the heat conduction area related to the gasification or liquefaction of the refrigerant can be flexibly changed according to the specific expansion demand, and to a certain extent, the contradiction between scalability and energy efficiency is solved. Meanwhile, the structure of the first heat exchange pipe in the evaporator in the application can improve the gasification efficiency of the refrigerant and the flow efficiency of the gaseous refrigerant by means of gas-liquid separation when the refrigerant appears to coexist with the pipe. In addition, the evaporator in the application only connects the main pipeline through the first water inlet pipe, the second water outlet pipe, the first liquid inlet pipe and the second liquid outlet pipe on one end of the evaporator, regardless of the number of connections.

[0024] 3. The modular design of the air-cooled heat exchanger in the application can meet the demand of the amount of cold air in the working space by increasing or decreasing the number of air-cooled heat exchangers, and the scalability is high. Meanwhile, the drum fan assembly in the air-cooled heat exchanger can effectively reduce the amount of air taken away by the leaf plate in the opposite direction with the high-speed rotating drum fan assembly at the air outlet, and effectively improve the overall air outlet efficiency of the air-cooled heat exchanger. In addition, the air-cooled heat exchanger in the application only connects the main pipeline through the third water inlet pipe and the third water outlet pipe on one end of the evaporator, regardless of the number of connections. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a schematic view of an evaporator;

[0026] Figure 2 is a schematic view of an evaporator;

[0027] Figure 3 is a schematic view of the communication structure of two groups of first heat exchange pipes in the evaporator;

[0028] Figure 4 is a schematic view of a first heat exchange pipe and its cross section;

[0029] Figure 5 is a schematic view of the cooperation of the first baffle and the water inlet on the first baffle in the evaporator;

[0030] Figure 6 is a schematic view of the transmission connection of the valve shaft of the first three-way valve and the valve shaft of the second three-way valve in the evaporator;

[0031] Figure 7is a sectional view of the synchronous shaft and the first baffle plate transmission connection in the evaporator;

[0032] Figure 8 is a sectional view of the first rack and the second rack transmission connection structure in the evaporator;

[0033] Figure 9 is a sectional view of two evaporators in series;

[0034] Figure 10 is a sectional view of the first liquid inlet pipe and the first liquid outlet pipe or the second liquid inlet pipe and the second liquid outlet pipe connection;

[0035] Figure 11 is a schematic diagram of the expansion valve;

[0036] Figure 12 is a sectional view of the expansion valve as a whole;

[0037] Figure 13 is a sectional view of the eighth gear and the adjusting rod transmission connection structure in the expansion valve;

[0038] Figure 14 is a schematic diagram of the air-cooled heat exchanger;

[0039] Figure 15 is a transverse sectional view of the air-cooled heat exchanger;

[0040] Figure 16 is a longitudinal sectional view of the air-cooled heat exchanger;

[0041] Figure 17 is a sectional view of the structure at one end of the air-cooled heat exchanger;

[0042] Figure 18 is a schematic diagram of the cooperation between the second clamping block on the rotating shaft of the leaf plate and the first clamping block on the corresponding shaft seat;

[0043] Figure 19 is a sectional view of the structure at the other end of the air-cooled heat exchanger;

[0044] Figure 20 is a schematic diagram of the connection structure between the two ends of the second heat exchange pipe and the third water inlet pipe and the third water outlet pipe;

[0045] Figure 21 is a sectional view of the connection between the third water inlet pipe and the first branch pipe or the third water outlet pipe and the second branch pipe;

[0046] Figure 22 is a fourth shell and its sectional view;

[0047] Figure 23 is a schematic diagram of the connection structure of two circular plates;

[0048] Figure 24 is a schematic diagram of the structure on the leaf plate;

[0049] Figure 25 is a schematic view of a structure of a wind-cooled air conditioner;

[0050] Reference signs in the drawings:

[0051] 100, evaporator; 101, first housing; 102, first water inlet pipe; 103, first screw sleeve; 104, first water outlet pipe; 105, second screw sleeve; 106, first on-off valve; 107, second water inlet pipe; 108, third screw sleeve; 109, second on-off valve; 110, second water outlet pipe; 111, fourth screw sleeve; 112, partition plate; 113, water passage; 114, guide rail; 115, first baffle; 116, first rack; 117, first guide seat; 118, first gear; 119, shaft sleeve; 120, first fixed shaft; 121, second gear; 122, second rack; 123, second guide seat; 124, third gear; 125, synchronizing shaft; 126, fourth gear; 127, fifth gear; 128, first three-way valve; 129, communication pipe; 130, second three-way valve; 131, sixth gear; 132, seventh gear; 133, first liquid outlet pipe; 134, fifth screw sleeve; 135, first pipe network; 136, first liquid inlet pipe; 137, sixth screw sleeve; 138, second liquid inlet pipe; 139, seventh screw sleeve; 140, second liquid outlet pipe; 141, eighth screw sleeve; 142, first heat exchange pipe; 143, refrigerant liquid pipe; 144, communication groove; 145, refrigerant gas pipe; 146, second baffle; 147, communication hole;

[0052] 200, expansion valve; 201, second housing; 202, stator; 203, ninth screw sleeve; 204, screw rod; 205, third rack; 206, eighth gear; 207, crank; 208, connecting rod; 209, adjusting rod; 210, tapered tip; 211, third housing; 212, second guide sleeve; 213, third liquid outlet pipe; 214, throttling opening; 215, tenth screw sleeve; 216, third liquid inlet pipe; 217, eleventh screw sleeve; 218, rotor; 219, first guide sleeve; 220, stepper motor assembly;

[0053] 300, air-cooled heat exchanger; 301, fourth shell; 302, air inlet; 303, air outlet; 304, mounting cavity; 305, lower arc wall; 306, upper arc wall; 307, rotating seat; 308, round plate; 309, first ring sleeve; 310, shaft seat; 311, first clamping block; 312, connecting rod; 313, rotating shaft; 314, second clamping block; 315, leaf plate; 316, vortex spring; 317, fixed rod; 318, second fixed shaft; 319, cylinder; 320, second ring sleeve; 321, ninth gear; 322, gear ring; 323, third ring sleeve; 324, hollow shaft motor; 325, clamping sleeve; 326, second heat exchange pipe; 327, second pipe network; 328, third water inlet pipe; 329, twelfth threaded sleeve; 330, first branch pipe; 331, thirteenth threaded sleeve; 332, third on-off valve; 333, third water outlet pipe; 334, fourteenth threaded sleeve; 335, second branch pipe; 336, fifteenth threaded sleeve; 337, fourth on-off valve; 338, drum fan assembly;

[0054] 401, sealing washer. DETAILED DESCRIPTION

[0055] In order to make the objects, technical solutions and advantages of the present application clearer, the following further describes the present application with reference to the embodiments and the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.

[0056] The serial numbers of components in the present application, such as "first", "second", etc., are only used to distinguish the described objects, and do not have any sequence or technical meaning. The "connection" and "coupling" in the present application include direct and indirect connection (coupling) unless otherwise specified. In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the devices or elements 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.

[0057] In the present invention, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature is "over", "above" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in horizontal height than the second feature. The first feature is "under", "below" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in horizontal height than the second feature.

[0058] As shown in Figures 1-25 A modular design of air-cooled air conditioner, comprising a compressor, a condenser, a circulating pump, a cooling tower, an expansion valve 200, an evaporator 100 and an air-cooled heat exchanger 300, the evaporator 100 has the characteristics of multiple sequential connection expansion, multiple connected evaporators 100 are connected to the main pipeline of water or refrigerant through the first evaporator 100 at the front end, and the first heat exchange pipe 142 in the evaporator 100 for refrigerant flow channel has the characteristics of separating the movement of gas and liquid when the refrigerant is in the state of gas-liquid coexistence in the same pipe.

[0059] The expansion valve 200 has the characteristics of high-precision adjustment of the throttle port 214 in the expansion valve 200 by reducing the transmission ratio of the stepping motor assembly 220 and the adjusting rod 209 in the expansion valve 200.

[0060] The drum fan assembly 338 in the air-cooled heat exchanger 300 has the characteristics of reducing the cold loss of the air outlet 303.

[0061] In further embodiments, as Figures 1-10As shown, the evaporator 100 comprises a cuboid first shell 101, one end of the first shell 101 is provided with a first water inlet pipe 102 and a second water outlet pipe 110, the other end of the first shell 101 is provided with a first water outlet pipe 104 opposite to the first water inlet pipe 102 and installed with a first switch valve 106, and a second water inlet pipe 107 opposite to the second water outlet pipe 110 and installed with a second switch valve 109, a group of first heat exchange pipes 142 are arranged between the first water inlet pipe 102 and the first water outlet pipe 104 and between the second water inlet pipe 107 and the second water outlet pipe 110, two groups of the first heat exchange pipes 142 are isolated from each other by a partition plate 112, a water passage 113 is formed in the partition plate 112 close to the first water outlet pipe 104, a first baffle 115 is arranged at the water passage 113 and opens and closes the water passage 113, the two groups of the first heat exchange pipes 142 close to the first water outlet pipe 104 are respectively communicated with a first liquid outlet pipe 133 and a second liquid inlet pipe 138 through a first pipe network 135, a first three-way valve 128 and a second three-way valve 130 are respectively arranged on the first liquid outlet pipe 133 and the second liquid inlet pipe 138, the first three-way valve 128 is connected with the second three-way valve 130 through a communication pipe 129, a valve shaft of the first three-way valve 128 is rotatably arranged in a circular hole on the first shell 101 and is in transmission connection with valve shafts of the first baffle 115 and the second three-way valve 130, the two groups of the first heat exchange pipes 142 close to the first water inlet pipe 102 are respectively connected with a first liquid inlet pipe 136 corresponding to the first liquid outlet pipe 133 and a second liquid outlet pipe 140 opposite to the second liquid inlet pipe 138 through the first pipe network 135.

[0062] In further embodiments, as shown in Figure 3 、 Figure 4 The first heat exchange pipe 142 comprises a refrigerant liquid pipe 143 communicated with the first liquid outlet pipe 133 and the first liquid inlet pipe 136 or the second liquid inlet pipe 138 and the second liquid outlet pipe 140 at two ends, a communication groove 144 is formed in a top pipe wall of the refrigerant liquid pipe 143, a refrigerant gas pipe 145 communicated with the communication groove 144 is arranged at the communication groove 144, a second baffle 146 is arranged in the refrigerant gas pipe 145 and shields the communication groove 144, and communication holes 147 are uniformly formed in both sides of the second baffle 146 along a length direction of the second baffle 146.

[0063] In further embodiments, as shown in Figure 2 、 Figure 3 、 Figure 9 、 Figure 10As shown, the ends of the first inlet pipe 102 and the second outlet pipe 110 are respectively rotatably provided with a first threaded sleeve 103 and a fourth threaded sleeve 111. The ends of the first outlet pipe 104 and the second inlet pipe 107 are respectively provided with a second threaded sleeve 105 that is threadedly engaged with the first threaded sleeve 103 on the adjacent first inlet pipe 102 and a third threaded sleeve 108 that is threadedly engaged with the fourth threaded sleeve 111 on the adjacent second outlet pipe 110. The ends of the first outlet pipe 104 and the second inlet pipe 107 are respectively provided with sealing washers 4 that mate with the first inlet pipe 102 and the second outlet pipe 110. 01. The ends of the first inlet pipe 136 and the second outlet pipe 140 are respectively provided with a sixth threaded sleeve 137 and an eighth threaded sleeve 141. The ends of the first outlet pipe 133 and the second inlet pipe 138 are respectively provided with a fifth threaded sleeve 134 that is threadedly engaged with the sixth threaded sleeve 137 on the adjacent first inlet pipe 136 and a seventh threaded sleeve 139 that is threadedly engaged with the eighth threaded sleeve 141 on the adjacent second outlet pipe 140. The ends of the first outlet pipe 133 and the second inlet pipe 138 are respectively provided with sealing gaskets 401 that are engaged with the first inlet pipe 136 and the second outlet pipe 140.

[0064] In a further embodiment, such as Figure 5 , Figure 6 , Figure 7 , Figure 8 As shown, the first baffle 115 is slidably disposed within two guide rails 114 on the partition 112. A first rack 116 is disposed on each guide rail 114. The first rack 116 is slidably disposed within a first guide seat 117 on the partition 112. The first rack 116 meshes with a first gear 118. The first gear 118 is disposed on a bushing 119. The bushing 119 is rotatably disposed on a first fixed shaft 120 on the partition 112. A second gear 121 with a diameter smaller than that of the first gear 118 is disposed on the bushing 119. The second gear 121 meshes with the second rack 122, which is slidably disposed in the second guide seat 123 on the partition plate 112. The second rack 122 meshes with the third gear 124, which is rotatably disposed on the synchronous shaft 125 in the first housing 101 and has a diameter larger than that of the second gear 121. The synchronous shaft 125 is provided with a fourth gear 126 and a seventh gear 132. The fourth gear 126 and the seventh gear 132 mesh with the fifth gear 127 on the valve shaft of the first three-way valve 128 and the sixth gear 131 on the valve shaft of the second three-way valve 130, respectively.

[0065] In a further embodiment, such as Figure 11 , Figure 12 , Figure 13As shown, the expansion valve 200 includes a stepper motor assembly 220. A third housing 211 is provided at the end of the stepper motor assembly 220. A first guide sleeve 219 is provided inside the third housing 211. A screw 204 driven by the stepper motor assembly 220 is slidably disposed within the first guide sleeve 219. A third rack 205 is provided at the lower end of the screw 204. The third rack 205 meshes with an eighth gear 206 disposed within the third housing 211. A crank 207 is provided on the axle of the eighth gear 206. A connecting rod 208 is hinged to the end of the crank 207. An adjusting rod 209 is hinged to the end of the connecting rod 208. The adjusting rod 209 is slidably disposed in a circular hole at the end of the third housing 211. Inside the second guide sleeve 212, a third outlet pipe 213 is provided at the end of the second guide sleeve 212. A throttling orifice 214, which is adjusted by the cone tip 210 at the end of the adjusting rod 209, is provided inside the third outlet pipe 213. A third inlet pipe 216, which communicates with the pipe wall of the third outlet pipe 213, is provided. The communication port between the third inlet pipe 216 and the third outlet pipe 213 is located between the throttling orifice 214 and the second guide sleeve 212. A tenth threaded sleeve 215 is rotatably provided at the end of the third outlet pipe 213. An eleventh threaded sleeve 217, which is threadedly engaged with the tenth threaded sleeve 215 on the main pipe, is provided at the end of the third inlet pipe 216. A sealing washer 401, which mates with the main pipe, is provided at the end of the third inlet pipe 216.

[0066] In a further embodiment, such as Figure 12 As shown, the stepper motor assembly 220 includes a second housing 201 connected to a third housing 211 and a first guide sleeve 219. A stator 202 is disposed inside the second housing 201, and a rotor 218 is rotatably disposed inside the stator 202. A ninth threaded sleeve 203 is disposed inside the rotor 218 and is threadedly connected to a screw 204.

[0067] In a further embodiment, such as Figures 14-24As shown, the air-cooled heat exchanger 300 includes a fourth housing 301 and a drum fan assembly 338. The fourth housing 301 has two mounting cavities 304 at both ends. An air inlet 302 and an air outlet 303 are respectively provided on both sides of the fourth housing 301. An upper arc wall 306 and a lower arc wall 305 are respectively provided on the upper and lower sides of the fourth housing 301. The drum fan assembly 338 is disposed between the upper arc wall 306 and the lower arc wall 305 of the fourth housing 301 and is driven to rotate by a hollow shaft motor 324 that is mounted to the wall of one end mounting cavity 304 via a retainer 325. A plurality of second heat exchange tubes 326 are densely arranged between the drum fan assembly 338 and the lower arc wall 305. The two ends of each second heat exchange tube 326 are respectively connected to the mounting cavities 304 at their respective ends. The second pipe network 327 is connected to the third inlet pipe 328 and the third outlet pipe 333. The third inlet pipe 328 and the third outlet pipe 333 are respectively provided with a first branch pipe 330 and a second branch pipe 335 connected to them. The first branch pipe 330 and the second branch pipe 335 are respectively provided with a third switch valve 332 and a fourth switch valve 337. The end of the third outlet pipe 333 of the third inlet pipe 328 is respectively provided with a twelfth threaded sleeve 329 and a fourteenth threaded sleeve 334. The ends of the first branch pipe 330 and the second branch pipe 335 are respectively provided with a thirteenth threaded sleeve 331 that is threaded to the twelfth threaded sleeve 329 on the adjacent third inlet pipe 328 and a fifteenth threaded sleeve 336 that is threaded to the fourteenth threaded sleeve 334 on the adjacent third outlet pipe 333.

[0068] In a further embodiment, such as Figure 17 , Figure 18 , Figure 19 , Figure 23 , Figure 24As shown, the drum fan assembly 338 includes two coaxial circular plates 308 and a cylinder 319. One circular plate 308 is mounted on the output shaft of a hollow shaft motor 324. A first ring 309 is provided at the central circular hole of the other circular plate 308. The first ring 309 is rotatably mounted in a rotating seat 307 within a corresponding side mounting cavity 304. The two circular plates 308 are connected by several circumferentially evenly distributed connecting rods 312. Several rotating shafts 313 are circumferentially evenly arranged between the two circular plates 308, and are rotatably engaged with their circular holes. Each rotating shaft 313 is provided with a blade 315 whose outer end engages with an upper arc wall 306. A spiral spring 316 is connected between the rotating shaft 313 and the bearing seat 310 on the circular plate 308 to unfold the blade 315. The cylinder 319 is provided with a second locking block 314 that cooperates with the first locking block 311 on the corresponding bearing 310. The cylinder 319 is eccentrically positioned between the two circular plates 308 and cooperates with the inner end of the blade 315. When the blade 315 reaches the air outlet 303 from the air inlet 302 via the lower arc wall 305, it swings and contracts under the action of the cylinder 319. When it reaches the air inlet 302 from the air outlet 303 via the upper arc wall 306, it swings and unfolds under the action of the cylinder 319. Two second rings 320 are provided at both ends of the cylinder 319. The second rings 320 are rotatably mounted on the second fixed shaft 318, which is fixed to the end wall of the fourth housing 301 via the fixed rod 317, and is connected to the output shaft of the hollow shaft motor 324. The rotation direction of the cylinder 319 is the same as the rotation direction of the circular plates 308.

[0069] In a further embodiment, such as Figure 19 As shown, the second ring sleeve 320 is provided with a ninth gear 321, which meshes with a gear ring 322 provided in the third ring sleeve 323, which is provided on the output shaft of the hollow shaft motor 324.

[0070] In the expansion valve 200 of the present invention, the adjusting rod 209 used to adjust the size of the throttling orifice 214, through the connecting rod 208 and the crank 207 forming a crank 207 slider structure with the eighth gear 206 driven to rotate by the third rack 205, significantly reduces the ratio of its movement amplitude to that of the third rack 205 when adjusting the throttling orifice 214 by micro-flow. This achieves high precision in adjusting the throttling orifice 214 by the adjusting rod 209. Simultaneously, when large-flow adjustment of the throttling orifice 214 is required, the crank 207 drives the adjusting rod 209 to its limit movement to meet the large-flow adjustment needs of the throttling orifice 214, thereby effectively meeting the future expansion requirements of the entire refrigeration system. The modular design of the evaporator 100 in this invention ensures that the heat conduction area related to refrigerant vaporization or liquefaction can be flexibly changed according to specific expansion requirements, thus resolving the contradiction between scalability and energy efficiency to a certain extent. Meanwhile, the structure of the first heat exchange tube 142 in the evaporator 100 of this invention can improve the vaporization efficiency and flow efficiency of the refrigerant by separating the gas and liquid when refrigerant coexists in the same tube. The modular design of the cold air heat exchanger in this invention can meet the cold air volume requirements in the working space by increasing or decreasing the number of cold air heat exchangers, and its scalability is high. At the same time, the drum fan assembly 338 in the air-cooled heat exchanger 300 can effectively reduce the air volume carried away by the blades 315 at the air outlet 303 due to the high-speed rotation of the drum fan assembly 338, effectively improving the overall air outlet efficiency of the cold air heat exchanger.

[0071] The operation flow of this invention is as follows:

[0072] The first switching valve 106 and the second switching valve 109 in the evaporator 100 are in the closed state, the first three-way valve 128 and the second three-way valve 130 are in the state of connecting the connecting pipe 129 with the first liquid outlet pipe 133 and the second liquid inlet pipe 138, and the first baffle 115 is in the open state for the water inlet 113. In the drum fan assembly 338 of the air-cooled heat exchanger 300, the blades 315 located at the air outlet 303 and abutting against the upper arc wall 306 are in a retracted state under the action of the cylinder 319. The second locking block 314 on the rotating shaft 313 where the retracted blades 315 are located separates from the first locking block 311 on the corresponding shaft seat 310, and the scroll spring 316 is in a compressed state. Meanwhile, the blades 315 located at the air inlet 302 and the lower arc wall 305 do not interact with the cylinder 319 and are in an extended state under the action of the corresponding scroll spring 316. The second locking block 314 on the rotating shaft 313 where the extended blades 315 are located abuts against the first locking block 311 on the corresponding shaft seat 310, and the scroll spring 316 is in a compressed state. The third switching valve 332 and the fourth switching valve 337 in the cold air heat exchanger are in a closed state.

[0073] When no expansion is required, only one evaporator 100 and one condenser are installed on the main pipeline, and a cold air heat exchanger is installed in each workspace.

[0074] Without the need for expansion, water in the chilled water circulation pipes enters the first housing 101 through the first inlet pipe 102, surrounding a corresponding set of first heat exchange tubes 142, and then through the water inlet 113 to another set of first heat exchange tubes 142. Finally, it flows through the second outlet pipe 110 to the third inlet pipe 328 of the cold air heat exchanger. As the water passes through the two sets of first heat exchange tubes 142 sequentially, the refrigerant flowing through the first inlet pipe 136, the first heat exchange tubes 142, and the second outlet pipe 140 circulates within the first housing 101. The water absorbs heat and cools, causing it to vaporize. This makes the water reaching the third inlet pipe 328 of the cold air heat exchanger very cold water. Meanwhile, the vaporized refrigerant in the refrigerant liquid pipe 143 of the first heat exchange pipe 142 enters the refrigerant gas pipe 145 through the connecting groove 144 and the connecting holes 147 on both sides of the second baffle 146. Under the isolation of the second baffle 146, the refrigerant moves along the refrigerant gas pipe 145 with the liquid refrigerant in the refrigerant liquid pipe 143 towards the second outlet pipe 140. This achieves gas-liquid separation when the refrigerant and liquid coexist in the same pipe, improving the refrigerant flow efficiency.

[0075] When it is necessary to expand the evaporator 100, the first inlet pipe 102 and the second outlet pipe 110 of the new evaporator 100 are connected to the first outlet pipe 104 and the second inlet pipe 107 of the evaporator 100 in the main pipeline, respectively. The first liquid inlet pipe 136 and the second liquid outlet pipe 140 of the new evaporator 100 are connected to the first liquid outlet pipe 133 and the second liquid inlet pipe 138 of the evaporator 100 in the main pipeline, respectively. At the same time, ensure that the first switch valve 106 and the second switch valve 109 of the newly connected evaporator 100 are closed, and that the first three-way valve 128 and the second three-way valve 130 of the newly connected evaporator 100 are in the state of connecting the connecting pipe 129 to the first liquid outlet pipe 133 and the second liquid inlet pipe 138. The first baffle 115 of the newly connected evaporator 100 is in the state of opening the water inlet 113 on the corresponding partition 112.

[0076] Then, open the original first switch valve 106 and second switch valve 109 in the main pipeline, and turn the original first three-way valve 128 and second three-way valve 130 of the evaporator 100 in the main pipeline to disconnect the connection between the first liquid outlet pipe 133 and the second liquid inlet pipe 138. While turning the first three-way valve 128 and the second three-way valve 130, the first baffle 115 opens the water inlet 113 on the partition 112.

[0077] After the new evaporator 100 is extended to the original evaporator 100 in the main pipeline through a modular connection, water flows sequentially through the first inlet pipe 102 of the original evaporator 100, the space within the first shell 101 of the original evaporator 100 corresponding to the first inlet pipe 102 and separated by the partition 112, the first outlet pipe 104 of the original evaporator 100, the first inlet pipe 102 of the new evaporator 100, the space within the first shell 101 of the new evaporator 100 corresponding to the first inlet pipe 102 and separated by the partition 112, the connecting pipe 129 of the new evaporator 100, the space within the first shell 101 corresponding to the second outlet pipe 110 of the new evaporator 100 and separated by the partition 112, the second outlet pipe 110 of the new evaporator 100, the second inlet pipe 107 of the original evaporator 100, and the second outlet pipe 110 of the original evaporator 100 to the third inlet pipe 328 of the cold air heat exchanger.

[0078] The newly connected evaporator 100 effectively increases the heat transfer area between the refrigerant and water, thereby improving the efficiency of the evaporator 100 and increasing the cooling capacity.

[0079] Without the need for expansion, the refrigerant in the main pipeline of the refrigeration cycle enters the third liquid outlet pipe 213 through the third liquid inlet pipe 216. The refrigerant in the third liquid outlet pipe 213 moves to the evaporator 100 through the throttling orifice 214. The stator 202 in the expansion valve 200 drives the rotor 218 to rotate. The rotor 218 drives the adjusting rod 209 to adjust the throttling orifice 214 through the ninth screw sleeve 203, screw 204, third rack 205, eighth gear 206, crank 207, and connecting rod 208. The movement range of the adjusting rod 209 is much smaller than the movement range of the third rack 205 driven by the stepper motor assembly 220 because it forms a crank 207 slider structure with the connecting rod 208 and the crank 207. This achieves high-precision adjustment of the cooling capacity. When the crank 207 drives the adjusting rod 209 to the limit range and near the limit range, the adjusting rod 209 can meet the adjustment of the large cooling capacity, which is convenient for system expansion.

[0080] Without the need for expansion, the hollow shaft motor 324 in the cold air heat exchanger drives the cylinder 319 and the blades 315 between the two circular plates 308 to move in the same direction at the same linear speed. This causes the blades 315 to oscillate relative to the cylinder 319 during their interaction, effectively reducing the frictional resistance between the blades 315 and the cylinder 319. Air at the inlet 302, driven by the blades 315 in the rotating drum fan assembly 338, moves into the working space through the second heat exchange tube 326 in the lower arc wall 305 and the outlet 303. The air is effectively cooled by absorbing heat as it passes through the second heat exchange tube 326. When the cooled air reaches the outlet 303 with the blades 315, the blades 315, simultaneously reaching the outlet 303, contract under the action of the cylinder 319. The contracted blades 315 significantly reduce the amount of cold air carried away in the reverse direction at the outlet 303, effectively reducing cold air recirculation.

[0081] When it is necessary to expand the cold air heat exchangers in the workspace, the third inlet pipe 328 and the third outlet pipe 333 of the new cold air heat exchanger are connected to the first branch pipe 330 and the second branch pipe 335 of the original cold air heat exchanger on the main pipeline, so that the new cold air heat exchanger is vertically spaced from the original cold air heat exchangers in the workspace. After the third inlet pipe 328 and the third outlet pipe 333 of the new cold air heat exchanger are connected to the first branch pipe 330 and the second branch pipe 335 of the original cold air heat exchanger on the main pipeline, the third switch valve 332 and the fourth switch valve 337 of the original cold air heat exchanger are opened, so that the third... The inlet pipe 328 and the third outlet pipe 333 are connected to the third inlet pipe 328 and the third outlet pipe 333 of the new cold air heat exchanger, respectively. The chilled water entering the original cold air heat exchanger from the main pipeline into the third inlet pipe 328 is split into two and enters the second heat exchange tube 326 of the two cold air heat exchangers. The chilled water entering the second heat exchange tube 326 of the cold air heat exchanger effectively absorbs heat and cools the air passing between the drum fan assembly 338 and the lower arc wall 305. After absorbing heat and heating up, the water in the second heat exchange tube 326 of the two cold air heat exchangers finally converges into the third outlet pipe 333 of the original cold air heat exchanger and flows into the evaporator 100 for circulation.

Claims

1. A modular design air-cooled air conditioner comprising a compressor, a condenser, a circulating pump, a cooling tower, an expansion valve, an evaporator and an air-cooled heat exchanger, characterized in that: the evaporator has the feature of multiple sequential connection expansion, and the multiple connected evaporators are connected to the main pipe of water or refrigerant through the first evaporator at the front end, and the first heat exchange pipe in the evaporator for refrigerant flow channel has the feature of separating the gas-liquid movement when the refrigerant is in the gas-liquid coexistence state; the expansion valve has the feature of high-precision adjustment of the throttle port in the valve by reducing the transmission ratio of the stepper motor assembly and the adjusting rod in the valve; the drum fan assembly in the air-cooled heat exchanger has the features of multiple sequential connection expansion and reducing the cold loss of the air outlet; the air-cooled heat exchanger comprises a fourth shell and a drum fan assembly, two installation cavities are arranged at the two ends of the fourth shell, an air inlet and an air outlet are respectively arranged on the two sides of the fourth shell, an upper arc wall and a lower arc wall are respectively arranged on the upper side and the lower side of the fourth shell, the drum fan assembly is arranged between the upper arc wall and the lower arc wall of the fourth shell and is driven to rotate by a hollow shaft motor installed on one end of the installation cavity wall, a plurality of second heat exchange pipes are densely arranged between the drum fan assembly and the lower arc wall, the two ends of the second heat exchange pipes are respectively communicated with the third water inlet pipe and the third water outlet pipe through the second pipe network arranged in the corresponding end installation cavity, the pipe wall of the third water inlet pipe and the third water outlet pipe is respectively provided with a first branch pipe and a second branch pipe communicated therewith, the first branch pipe and the second branch pipe are respectively provided with a third switch valve and a fourth switch valve, the end of the third water inlet pipe and the third water outlet pipe is respectively provided with a twelfth screw sleeve and a fourteenth screw sleeve, and the end of the first branch pipe and the second branch pipe is respectively provided with a thirteenth screw sleeve threadedly matched with the twelfth screw sleeve on the adjacent third water inlet pipe and a fifteenth screw sleeve threadedly matched with the fourteenth screw sleeve on the adjacent third water outlet pipe; the drum fan assembly comprises two coaxial circular plates and a circular cylinder, one of the circular plates is arranged on the output shaft of the hollow shaft motor, a first ring sleeve is arranged at the center hole of the other circular plate, the first ring sleeve is rotatably arranged in the rotating seat in the corresponding side installation cavity, the two circular plates are connected by a plurality of circumferentially uniformly distributed connecting rods, a plurality of rotating shafts are circumferentially and uniformly arranged between the two circular plates and are rotatably matched with the circular holes on the circular plates, the rotating shafts are provided with blade plates matched with the upper arc wall at the outer end, the rotating shafts and the shaft seats on the circular plates are connected with the vortex springs to make the blade plates expand, the rotating shafts are provided with second clamping blocks matched with the first clamping blocks on the corresponding shaft seats, the circular cylinder is eccentrically arranged between the two circular plates and is matched with the inner end of the blade plate, the blade plate swings and contracts under the action of the circular cylinder when it reaches the air outlet from the air inlet through the lower arc wall, and the blade plate swings and expands under the action of the circular cylinder when it reaches the air inlet from the air outlet through the upper arc wall, and the two ends of the circular cylinder are provided with two second ring sleeves, the second ring sleeves are rotatably arranged on the second fixed shaft fixedly connected with the end wall of the fourth shell by a fixed rod and are in transmission connection with the output shaft of the hollow shaft motor, and the rotating direction of the circular cylinder is the same as that of the circular plate. Without expansion, the hollow shaft motor drives the same direction and the same linear speed movement between the leaf plate and the two circular plates in the cold air heat exchanger, so that the leaf plate swings when interacting with the cylinder; The air at the inlet moves to the working space through the second heat exchange pipe in the lower arc wall and the outlet under the driving of the leaf plate in the rotating drum fan assembly; When the air cooled by heat absorption reaches the outlet, the leaf plate that reaches the outlet at the same time shrinks under the action of the cylinder.

2. The modularly designed air-cooled air conditioner according to claim 1, characterized in that The evaporator comprises a first cuboid shell, one end of the first shell is provided with a first water inlet pipe and a second water outlet pipe, the other end of the first shell is provided with a first water outlet pipe opposite to the first water inlet pipe and installed with a first switch valve and a second water inlet pipe opposite to the second water outlet pipe and installed with a second switch valve, a group of first heat exchange pipes are arranged between the first water inlet pipe and the first water outlet pipe and between the second water inlet pipe and the second water outlet pipe, the two groups of first heat exchange pipes are isolated from each other by a partition plate, a water passage is formed in the partition plate near the first water outlet pipe, a first baffle is arranged at the water passage and opens and closes the water passage, the first water outlet pipe and the second water inlet pipe are respectively communicated with the first liquid outlet pipe and the second liquid inlet pipe through the first pipe network near the first water outlet pipe of the two groups of first heat exchange pipes, a first three-way valve and a second three-way valve are respectively arranged on the first liquid outlet pipe and the second liquid inlet pipe, the first three-way valve is connected with the second three-way valve through a communication pipe, the valve shaft of the first three-way valve is rotatably arranged in a circular hole on the first shell and is in transmission connection with the valve shaft of the second three-way valve and the first baffle, the first liquid inlet pipe corresponding to the first liquid outlet pipe and the second liquid outlet pipe opposite to the second liquid inlet pipe are respectively connected with the first pipe network near the first water inlet pipe of the two groups of first heat exchange pipes.

3. The modularly designed air-cooled air conditioner according to claim 2, characterized in that The first heat exchange pipe comprises refrigerant liquid pipes communicated with the first liquid outlet pipe and the first liquid inlet pipe or the second liquid inlet pipe and the second liquid outlet pipe at two ends, a communication groove is formed in the top pipe wall of the refrigerant liquid pipe, a refrigerant gas pipe communicated with the communication groove is arranged at the communication groove, a second baffle is arranged in the refrigerant gas pipe and shields the communication groove, and communication holes are uniformly formed in the two sides of the second baffle along the length direction of the second baffle.

4. The modularly designed, air-cooled air conditioner according to claim 2, characterized in that First screw sleeves and fourth screw sleeves are rotatably arranged at the ends of the first water inlet pipe and the second water outlet pipe, second screw sleeves and third screw sleeves are arranged at the ends of the first water outlet pipe and the second water inlet pipe and are in threaded connection with the first screw sleeves on the adjacent first water inlet pipe and the fourth screw sleeves on the adjacent second water outlet pipe, sealing gaskets matched with the first water inlet pipe and the second water outlet pipe are arranged at the ends of the first water outlet pipe and the second water inlet pipe, sixth screw sleeves and eighth screw sleeves are rotatably arranged at the ends of the first liquid inlet pipe and the second liquid outlet pipe, fifth screw sleeves and seventh screw sleeves are arranged at the ends of the first liquid outlet pipe and the second liquid inlet pipe and are in threaded connection with the sixth screw sleeves on the adjacent first liquid inlet pipe and the eighth screw sleeves on the adjacent second liquid outlet pipe, and sealing gaskets matched with the first liquid inlet pipe and the second liquid outlet pipe are arranged at the ends of the first liquid outlet pipe and the second liquid inlet pipe.

5. The modularly designed, air-cooled air conditioner according to claim 2, characterized in that The first baffle is slidably arranged in two guide rails on the partition plate, a first rack is arranged on the guide rail, the first rack is slidably arranged in a first guide seat on the partition plate, the first rack is engaged with a first gear, the first gear is arranged on a shaft sleeve, the shaft sleeve is rotatably arranged on a first fixed shaft on the partition plate, a second gear with a smaller diameter than the first gear is arranged on the shaft sleeve, the second gear is engaged with a second rack slidably arranged in a second guide seat on the partition plate, the second rack is engaged with a third gear with a larger diameter than the second gear and rotatably arranged on a synchronous shaft in the first housing, the synchronous shaft is provided with a fourth gear and a seventh gear, the fourth gear and the seventh gear are respectively engaged with a fifth gear on a valve shaft of the first three-way valve and a sixth gear on a valve shaft of the second three-way valve.

6. The modularly designed, air-cooled air conditioner according to claim 1, characterized in that The expansion valve comprises a stepper motor assembly, an end of the stepper motor assembly is provided with a third housing, a first guide sleeve is arranged in the third housing, a screw driven by the stepper motor assembly is slidably arranged in the first guide sleeve, a third rack is arranged at a lower end of the screw, the third rack is engaged with an eighth gear arranged in the third housing, a crank is arranged on an axle of the eighth gear, an end of the crank is hingedly connected with a connecting rod, an end of the connecting rod is hingedly connected with an adjusting rod, the adjusting rod is slidably arranged in a second guide sleeve at a circular hole at an end of the third housing, an end of the second guide sleeve is provided with a third liquid outlet pipe, a throttling opening adjusted by a tapered tip at an end of the adjusting rod is arranged in the third liquid outlet pipe, a third liquid inlet pipe in communication with the third liquid outlet pipe is arranged on a pipe wall of the third liquid outlet pipe, a communication opening of the third liquid inlet pipe with the third liquid outlet pipe is located between the throttling opening and the second guide sleeve, an end of the third liquid outlet pipe is rotatably provided with a tenth screw sleeve, an end of the third liquid inlet pipe is provided with an eleventh screw sleeve threadedly matched with the tenth screw sleeve on a main pipeline, an end of the third liquid inlet pipe is provided with a sealing washer matched with the main pipeline.

7. The modularly designed, air-cooled air conditioner according to claim 6, characterized in that The stepper motor assembly comprises a second housing connected with the third housing and the first guide sleeve, a stator is arranged in the second housing, a rotor is rotatably arranged in the stator, a ninth screw sleeve threadedly connected with the screw is arranged in the rotor.

8. The modularly designed, air-cooled air conditioner according to claim 1, characterized in that A ninth gear is arranged on the second ring sleeve, the ninth gear is engaged with a gear ring arranged in a third ring sleeve, the third ring sleeve is arranged on an output shaft of the hollow shaft motor.

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