Inter-row dynamic dual-source air conditioning

Abstract

This utility model discloses a dynamic dual-source air conditioner for server racks that improves cooling efficiency and reduces space occupation in the server room. It is used for parallel connection with server racks and includes a chassis and a cooling unit. The cooling unit is housed within the chassis cavity and includes a fan on the supply air side, a compressor, a plate heat exchanger, an electrical control box, and a power supply electrically connected to the control box on the return air side. An evaporator assembly is located between the supply air side and the return air side. The evaporator assembly includes a water coil and a refrigerant coil. The plate heat exchanger has a refrigerant channel and a water channel. One end of the refrigerant channel is connected to the compressor exhaust end, and the other end is connected to the refrigerant coil. The refrigerant coil is connected to the compressor intake end. The water channel inlet end is connected to an external cooling water pipe, and the water channel outlet end is connected to an external cooling device. The water coil inlet end is connected to an external chilled water supply pipe, and the water coil outlet end is connected to an external return water network. The fan and compressor are electrically connected to the electrical control box.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning technology, and in particular to a dynamic dual-source air conditioner between rows. Background Technology

[0002] A dynamic dual-source air conditioner is an air conditioning system that employs two cooling sources working in tandem. It typically consists of two systems: a compressor-driven refrigerant circulation system for heat exchange, and a natural cooling source system using low-temperature circulating water for heat exchange. Both systems are dynamically adjusted and controlled. The core of a dynamic dual-source air conditioner lies in its redundant dual-source architecture and dynamic adjustment algorithm, which includes three main operating modes: fully natural cooling mode, hybrid mode, and full compressor mode. In fully natural cooling mode, chilled water from a cooling tower is used to cool the server room during winter or transitional seasons, achieving ultra-low power consumption. In hybrid mode, when the ambient temperature rises and natural cooling is insufficient, the compressor system supplements the cooling capacity. In this mode, both systems are constantly adjusting, effectively extending the natural cooling time. In full compressor mode, when the ambient temperature rises further and natural cooling becomes completely unusable, the compressor system handles all cooling. Because dynamic dual-source air conditioners involve two refrigeration systems, their control systems are complex, resulting in a complex internal structure. Therefore, the industry generally implements them as room-level air conditioners. Figure 1 The appearance and maintenance space of the room-level dynamic dual-cooling-source air conditioner 1 are shown (the shaded area represents the space required for maintenance). Figure 2 The internal layout of a room-level dynamic dual-source air conditioner 1 is shown. When used as a room-level air conditioner for server room cooling, its large size prevents it from being placed close to the heat source and alongside the server racks, resulting in lower cooling efficiency. Furthermore, the complex control system involves more maintenance components and structures, typically requiring sufficient maintenance space at the front, back, and sides of the air conditioner, and possibly even at the top or bottom. This significant space requirement for air conditioner installation and maintenance increases the difficulty of arranging other server racks within the server room. Utility Model Content

[0003] Therefore, it is necessary to address the above-mentioned shortcomings by providing a dynamic dual-source air conditioning system between rows that can improve the cooling efficiency of server racks and reduce the space occupied by the server room by allowing maintenance from the front and rear sides.

[0004] On one hand, this application provides an inter-row dynamic dual-cooling-source air conditioner for installation between adjacent server racks and connected in parallel with the server racks, comprising:

[0005] The chassis has a front side for air supply and a rear side for air return.

[0006] A refrigeration unit, housed within a chassis cavity, includes a fan on the supply air side, a compressor, a plate heat exchanger, an electrical control box, and a power supply electrically connected to the electrical control box on the return air side, and an evaporator assembly located between the supply air side and the return air side. The evaporator assembly includes a water coil and a refrigerant coil. The plate heat exchanger has a refrigerant channel and a water channel separated by heat exchange plates. One end of the refrigerant channel is connected to the exhaust end of the compressor, and the other end is connected to the refrigerant coil. The refrigerant coil is connected to the inlet end of the compressor. The inlet end of the water channel is connected to an external cooling water pipe, and the outlet end is connected to an external cooling device. The inlet end of the water coil is connected to an external chilled water supply pipe, and the outlet end is connected to an external return water network. The fan and the compressor are respectively electrically connected to the electrical control box.

[0007] In one embodiment, the inter-row dynamic dual-source air conditioner further includes a valve assembly disposed on the return air side. The valve assembly includes a first two-way valve, a second two-way valve, and a three-way valve electrically connected to the electrical control box. The two ends of the first two-way valve are respectively connected to the water channel and the external cooling water pipe. The inlet end of the second two-way valve is used to connect to the external chilled water supply pipe. The outlet end of the second two-way valve is connected to the first pipe of the three-way valve. The second pipe of the three-way valve is connected to the water coil. The water coil is connected to the external return water network through the chilled water return pipe. The third pipe of the three-way valve is connected to the chilled water return pipe through a connecting branch pipe.

[0008] In one embodiment, the water coil and the refrigerant coil together form an evaporator assembly with a V-shaped or straight structure.

[0009] In one embodiment, the water coil is disposed on the side of the refrigerant coil near the return air side.

[0010] In one embodiment, the chassis includes a frame, a front panel detachably mounted on the front side of the frame, a rear panel detachably mounted on the rear side of the frame, two side panels detachably mounted on the left and right sides of the frame, a top plate detachably mounted on the top of the frame, and a bottom plate detachably mounted on the bottom of the frame. The frame, the front panel, the rear panel, the two side panels, the top plate, and the bottom plate together form a receiving space for accommodating the refrigeration unit. The front panel has a plurality of exhaust holes communicating with the receiving space, and the rear panel has a plurality of air inlets communicating with the receiving space.

[0011] In one embodiment, the front panel is provided with a display screen that is electrically connected to the electrical control box.

[0012] In one embodiment, the air supply side is provided with a plurality of the fans arranged in an array along the height direction of the front panel.

[0013] In one embodiment, the side panel is provided with a rack-connecting piece for connecting to a server rack.

[0014] In one embodiment, the chassis is provided with a slide rail and a tray slidably disposed on the slide rail, and the compressor is disposed on the tray;

[0015] The chassis is equipped with guide rails, and the electrical control box and the power supply are slidably inserted into the guide rails; or the chassis is equipped with a pull-out tray, and the electrical control box and the power supply are mounted on the tray.

[0016] In one embodiment, the inter-row dynamic dual-source air conditioner further includes a liquid pipe connected to the refrigerant channel and an expansion valve connected to the liquid pipe. The expansion valve is connected to the refrigerant coil, and a sight glass is installed on the liquid pipe.

[0017] The in-row dynamic dual-source air conditioner of this invention places the fan on the supply air side of the chassis, the compressor, plate heat exchanger, electrical control box and power supply on the return air side of the chassis, and the evaporator assembly between the supply air side and the return air side. During equipment maintenance, all components can be replaced and maintained from both the front and rear sides of the chassis. This front-and-rear maintenance method makes it possible to connect the in-row dynamic dual-source air conditioner to the server racks and install it between server racks. The space between server racks can be utilized for installing the in-row dynamic dual-source air conditioner, reducing the space occupied by the air conditioner during installation and maintenance, improving the space utilization rate of the server room, and reducing the layout difficulty of other server racks in the server room. The connection between the in-row dynamic dual-source air conditioner and the server racks allows the air conditioner to be placed closer to personnel, reducing the area requiring temperature regulation and effectively improving the cooling efficiency of the server racks. Attached Figure Description

[0018] Figure 1 A schematic diagram showing the appearance and maintenance space of a room-level dynamic dual-cooling-source air conditioner;

[0019] Figure 2 A schematic diagram of the internal layout of a room-level dynamic dual-cooling-source air conditioner;

[0020] Figure 3 This is a schematic diagram of the structure of an inter-row dynamic dual-cooling-source air conditioner in one embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of the inter-row dynamic dual-cooling-source air conditioner layout in one embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of the structure of the inter-row dynamic dual-cooling-source air conditioner after the front panel has been removed in one embodiment of the present invention;

[0023] Figure 6 This is a front view of an inter-row dynamic dual-cooling-source air conditioner after the front panel has been removed, according to one embodiment of the present invention.

[0024] Figure 7 This is a schematic diagram of the structure of the inter-row dynamic dual-cooling-source air conditioner after the back panel has been removed in one embodiment of the present invention;

[0025] Figure 8 This is a rear view of the inter-row dynamic dual-cooling-source air conditioner after the back panel has been removed in one embodiment of the present invention;

[0026] Figure 9 This is a top view of the inter-row dynamic dual-cooling-source air conditioner after the top plate has been removed in one embodiment of the present invention. Detailed Implementation

[0027] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0028] Please combine Figure 3-9This utility model discloses an inter-row dynamic dual-source air conditioner 10 that can improve the cooling efficiency of server racks and reduce the space occupied in the computer room by allowing maintenance from the front and rear sides. The air conditioner is used to be installed between adjacent server racks 20 and connected in parallel with the server racks 20, thereby shortening the distance between the air conditioner and the heat source. By reducing the size of the area where the air conditioner needs to regulate temperature, the purpose of improving cooling efficiency is achieved. Specifically, the air conditioner in this embodiment includes a chassis 100 and a cooling unit 200. The front side of the chassis 100 is the air supply side 110, and the rear side of the chassis 100 is the air return side 120. In order to facilitate the smooth entry of air in the computer room into the inner cavity of the chassis 100 through the air return side 120 of the chassis 100, and to facilitate maintenance personnel to repair the components inside the chassis 100 from the rear side of the air conditioner, the space between the rear side of the air conditioner and the external fixing parts needs to be sufficient to allow at least one person to enter during installation to ensure smooth maintenance of the air conditioner. In this embodiment, the refrigeration unit 200 is housed within the cavity of the chassis 100. The refrigeration unit 200 includes a fan 210 disposed on the supply air side 110, a compressor 220 disposed on the return air side 120, a plate heat exchanger 230, an electrical control box 240, and a power supply 250 electrically connected to the electrical control box 240. An evaporator assembly 260 is disposed between the supply air side 110 and the return air side 120. The evaporator assembly 260 includes a water coil 261 and a refrigerant coil 262. The plate heat exchanger 230 contains refrigerant separated by heat exchange plates. The refrigerant passage has one end connected to the discharge end of the compressor 220 and the other end connected to the refrigerant coil 262. The refrigerant coil 262 is connected to the intake end of the compressor 220. The water inlet end of the water passage is used to connect to the external cooling water pipe, and the water outlet end of the water passage is used to connect to the external cooling device. The water inlet end of the water coil 261 is used to connect to the external chilled water supply pipe, and the water outlet end of the water coil 261 is used to connect to the external return water network. The fan 210 and the compressor 220 are electrically connected to the electrical control box 240 respectively.

[0029] During air conditioning operation, fan 210 starts under the control of control box 240, agitating the air inside chassis 100 and increasing the airflow velocity inside chassis 100. This reduces the air pressure inside chassis 100, allowing air from the server room to enter the interior of chassis 100 via return air side 120. When the outdoor temperature is low, the air conditioner enters natural cooling mode, and chilled water from the external chilled water supply pipe enters water coil 261, causing the temperature of water coil 261 to drop. Thus, the air entering chassis 100 exchanges heat and cools down through contact with water coil 261. The cooled air is then discharged via supply air side 110 of chassis 100, cooling the server rack 20 next to the air conditioner. When the ambient temperature rises to a point where natural cooling is no longer possible, chilled water is introduced into the water coil 261 to cool the air inside the chassis 100. Simultaneously, high-temperature gaseous refrigerant enters the refrigerant channel of the plate heat exchanger 230 and exchanges heat with the cooling water in the water channel through the heat exchange plates. This causes the high-temperature gaseous refrigerant to cool down and condense into liquid low-temperature refrigerant. The liquid low-temperature refrigerant then enters the refrigerant coil 262, further cooling the air in contact with it. Thus, through the combined action of the water coil 261 and the refrigerant coil 262, the air inside the chassis 100 is cooled, thereby providing cooling for the server rack 20 located next to the chassis 100. When the ambient temperature rises further, rendering natural cooling ineffective, the flow of chilled water into the water coil 261 stops. The electrical control box 240 controls the compressor 220 to operate, and cool water is circulated into the water channels of the plate heat exchanger 230. This cools the refrigerant and further cools the air through the refrigerant in the refrigerant coil 262, achieving the refrigeration purpose. In this embodiment, the temperature of the chilled water connected to the water coil 261 is 5-12°C, and the temperature of the cooling water connected to the plate heat exchanger 230 is 25-35°C.

[0030] The aforementioned inter-row dynamic dual-cooling-source air conditioner 10 places the fan 210 on the supply air side 110 of the casing 100, and places the compressor 220, plate heat exchanger 230, electrical control box 240 and power supply 250 on the return air side 120 of the casing 100. The evaporator assembly 260 is placed between the supply air side 110 and the return air side 120. Dynamic dual-cooling-source control is achieved in the smaller space of the inter-row casing 100, thus optimizing the air conditioning structure layout. During equipment maintenance, all components can be replaced and maintained from both the front and rear sides of the chassis 100. This front and rear maintenance method makes it possible to connect the inter-row dynamic dual-source air conditioner 10 with the server rack 20 and install it between the server racks 20. The space between the server racks 20 can be used to install the inter-row dynamic dual-source air conditioner 10, reducing the space occupied by the inter-row dynamic dual-source air conditioner 10 during installation and maintenance, improving the space utilization rate of the server room, and reducing the layout difficulty of other racks in the server room. The connection between the inter-row dynamic dual-source air conditioner 10 and the server rack 20 allows the air conditioner to be placed closer to the personnel, and the area that needs to be regulated is smaller, which can effectively improve the cooling efficiency of the server rack 20.

[0031] In this embodiment, the air conditioner is at the same height as the server rack 20 to be cooled, to facilitate the modular layout of the data center. The chassis 100 includes a rack 130, a front panel 140 detachably mounted on the front side of the rack 130, a rear panel 150 detachably mounted on the rear side of the rack 130, two side panels 160 detachably mounted on the left and right sides of the rack 130, a top plate 170 detachably mounted on the top of the rack 130, and a bottom plate 180 detachably mounted on the bottom of the rack 130. The rack 130, front panel 140, rear panel 150, two side panels 160, top plate 170, and bottom plate 180 together form a housing space for housing the cooling unit 200. The front panel 140 has several exhaust holes 141 communicating with the housing space, and the rear panel 150 has several air inlets communicating with the housing space. Furthermore, a display screen 142 electrically connected to the electrical control box 240 is provided on the front panel 140. Maintenance personnel can view relevant operating parameters of the air conditioner through the display screen 142, and can also send commands to the electrical control box 240 to adjust the operating parameters of the air conditioner by operating the relevant controls on the display screen 142. The display screen 142 can be installed at any position on the front panel 140. Preferably, the display screen 142 is located in the middle area of ​​the front panel 140 and is at the same height as the electrical control box 240 and the power supply 250 to shorten the wiring distance. The front panel 140 has mounting holes through which the display screen 142 passes and is connected to the electrical control box 240, and the display surface of the display screen 142 is located on the outer side of the front panel 140. The air supply side 110 is provided with a plurality of fans 210 arranged in an array along the height direction of the front panel 140 to increase the power of airflow within the casing 100, thereby enabling the air in the machine room to be quickly drawn into the casing 100 for cooling. In this embodiment, the fan 210 can be an axial fan, a centrifugal fan, or other commonly available fans. Preferably, the fan 210 is an axial fan, which has advantages such as large air volume, compact structure, and low cost. It can allow a large amount of air in the computer room to enter the chassis 100 quickly, be cooled, and then be discharged, so as to quickly cool down the server rack 20.

[0032] In addition, in this embodiment, at least a plurality of annularly distributed exhaust holes 141 are provided on the edge of the front panel 140 to increase the air outlet area. By providing a plurality of annularly distributed exhaust holes 141 on the edge of the front panel 140, compared with a room-level air conditioner, when the air conditioner is placed near the heat source (server rack 20), the distance that the cooling air discharged from the chassis 100 flows to the server rack 20 next to the air conditioner is further shortened, the size of the area that needs to be regulated is reduced, and the cooling efficiency is further improved. Preferably, a plurality of exhaust holes 141 are also provided on the front panel 140 around the display screen 142. In this way, when maintenance personnel operate or view the display screen 142, the cooled air in the chassis 100 is blown towards the maintenance personnel through the exhaust holes 141 around the display screen 142, which can simultaneously cool the maintenance personnel.

[0033] In this embodiment, the two side panels 160 on the left and right sides, the top panel 170, and the bottom panel 180 are fixedly connected to the frame 130 by screws or clips. The front panel 140 of the chassis 100 can be a single-door structure or a double-door structure. When the front panel 140 is a single-door structure, one side of the front panel 140 is hinged to the frame 130, and the other side of the front panel 140 is engaged with the frame 130 by a door lock. When the front panel 140 is a double-door structure, the two door panels of the front panel 140 are arranged opposite each other, and the engaging parts of the two door panels are fixed by a door lock. The parts of the two door panels facing away from the door lock are respectively hinged to the frame 130. Similarly, the rear panel 150 of the chassis 100 can be a single-door structure or a double-door structure. When the rear panel 150 is a single-door structure, one side of the rear panel 150 is hinged to the frame 130, and the other side of the rear panel 150 is engaged with the frame 130 via a door lock. When the rear panel 150 is a double-door structure, the two door panels of the rear panel 150 are arranged opposite each other, and the engaging parts of the two door panels are fixed by a door lock. The parts of the two door panels facing away from the door lock are respectively connected to the frame 130 via hinges. Of course, bends or patterns can also be provided on the edges of the front panel 140 and the rear panel 150 to meet the shape requirements of the air conditioner.

[0034] It should be noted that during routine maintenance and use of the air conditioner, the top panel 170, bottom panel 180, and side panels 160 are fixed components and do not need to be removed. Furthermore, since the air conditioner is installed between the server racks 20, the side panels 160 are in contact with the sides of the server racks, making removal of the side panels 160 unnecessary. In this case, please refer to... Figure 4 , Figure 4The shaded area in the diagram represents the maintenance area for the air conditioner. Like the server rack 20, the air conditioner only requires opening the front panel 140 and rear panel from the front and rear sides to access the internal components through the pre-reserved space. The air conditioner and server rack 20 share a common maintenance space, eliminating the need for additional space. Furthermore, in this embodiment, the side panel 160 is equipped with a parallel connection piece 161 for connecting the server rack 20. The side panel 160 is screwed to the server rack 20 via the parallel connection piece 161. This facilitates modular layout of the data center when the air conditioner and server rack 20 are at the same height and connected via the parallel connection piece 161. Additionally, the parallel arrangement of the air conditioner and server rack 20 achieves modular design, adapting the overall size of the server rack 20 to the arrangement of the air conditioners, thus simplifying the layout and construction of the data center.

[0035] In one embodiment, the water coil 261 is disposed on the side of the refrigerant coil 262 near the return air side 120. That is, the water coil 261 is adjacent to the return air side 120, and the refrigerant coil 262 is adjacent to the supply air side 110. In this way, when air enters the chassis 100 from the return air side 120, it first comes into contact with the water coil 261 and is pre-cooled. The cooled air then comes into contact with the refrigerant coil 262 for secondary cooling. The chilled water in the water coil 261 efficiently cools the high-temperature air, and the water coil 261 can handle a large amount of sensible heat load. The refrigerant coil 262 finely handles the remaining load, which can avoid condensation and energy waste. Furthermore, the water coil 261 includes two sets of coils arranged vertically, and the refrigerant coil 262 includes two sets of coils arranged vertically. The two sets of coils of the water coil 261 can be set independently or formed as one piece, and the two sets of coils of the refrigerant coil 262 can be set independently or formed as one piece. The specific choice can be made according to the selection of air conditioning components and cost control, which will not be elaborated here.

[0036] Furthermore, the water coil 261 and the refrigerant coil 262 together form an evaporator assembly 260 with a V-shaped or straight-line structure. Preferably, the water coil 261 and the refrigerant coil 262 together form a V-shaped evaporator assembly 260, with an included angle of 60-90°. By setting the evaporator assembly 260 to a V-shaped structure, i.e., both the water coil 261 and the refrigerant coil 262 are arranged at an angle, the dimensions of the front and rear sides of the air conditioning unit can be reduced while maintaining the same cooling and heat exchange area, thereby achieving a compact layout inside the air conditioner, maximizing the use of space inside the air conditioning unit and reducing the volume of the air conditioner. In addition, when the evaporator assembly 260 is set to a V-shaped structure, the evaporator assembly 260 has a funnel-shaped structure, which can guide the airflow to diffuse naturally to the water coil and refrigerant coil on both sides, avoiding the airflow dead zone of traditional right-angle air intake. Of course, in actual design, the water coil 261 and the refrigerant coil 262 can be arranged in a straight line (arranged along the front and rear sides of the chassis 100) according to the size of the water coil 261 and the refrigerant coil 262 and the width of the chassis 100. Alternatively, the water coil 261 and the refrigerant coil 262 can be combined to form a W-shaped evaporator assembly 260. This will not be elaborated further here.

[0037] In one embodiment, the inter-row dynamic dual-source air conditioner 10 further includes a valve assembly 270 disposed on the return air side 120. The valve assembly 270 includes a first two-way valve 271, a second two-way valve 272, and a three-way valve 273 electrically connected to the electrical control box 240. The two ends of the first two-way valve 271 are respectively connected to a water channel and an external cooling water pipe. The inlet end of the second two-way valve 272 is used to connect to an external chilled water supply pipe. The outlet end of the second two-way valve 272 is connected to the first pipe of the three-way valve 273. The second pipe of the three-way valve 273 is connected to a water coil 261. The water coil 261 is connected to an external return water network through a chilled water return pipe. The third pipe of the three-way valve 273 is connected to the chilled water return pipe through a connecting branch pipe. In this embodiment, the first two-way valve 271 is used to control the flow of cooling water into the plate heat exchanger 230, that is, to open in the air conditioner's mixed mode or full compressor 220 cooling mode, so that the cooling water can cool the refrigerant. The second two-way valve 272 and the three-way valve 273 are used together to control the flow of chilled water, that is, to operate in the air conditioner's mixed mode and natural cooling mode, so that chilled water can enter the water coil 261. In addition, in this embodiment, a third pipeline connecting the chilled water return pipe and the three-way valve 273 is connected by a branch pipe, so that the high-temperature return water output from the water coil 261 after heat exchange is mixed with the chilled water at the inlet of the water coil 261, so as to increase the water temperature entering the water coil 261 when the chilled water temperature is too low, and prevent the water coil 261 from freezing and bursting.

[0038] In one embodiment, the chassis 100 is provided with a slide rail 101 and a support plate 102 slidably mounted on the slide rail 101. The compressor 220 is mounted on the support plate 102. A shock-absorbing spring is provided at the connection between the support plate 102 and the compressor 220 to reduce the vibration transmitted to the compressor 220 from the external environment. Furthermore, the slide rail 101 is mounted on the bottom plate 180 of the chassis 100. In this way, the compressor 220 is supported by the bottom plate 180 of the chassis 100, the slide rail 101, and the support plate 102, which can prevent the compressor 220 from falling due to insufficient support. During maintenance, the compressor 220 can be pulled out together with the support plate 102 simply by loosening the union joint and the outer fixing bolts. The chassis 100 is equipped with a guide rail 103, on which the electrical control box 240 and power supply 250 are slidably inserted; or the chassis 100 is equipped with a pull-out tray, on which the electrical control box 240 and power supply 250 are mounted. In other words, the electrical control box 240 and power supply 250 adopt a pull-out design, allowing them to be removed from the chassis 100 for component replacement and control program upgrades during maintenance and repair, thus reducing maintenance difficulty. In this embodiment, the plate heat exchanger 230 is mounted overhead within the chassis 100 and located above the compressor 220. The plate heat exchanger 230 can be removed from the return air side 120 after the interface piping is disconnected, and all its piping can be maintained within the return air side 120 area. The first two-way valve 271, the second two-way valve 272, and the three-way valve 273 are all supported and fixed on the frame 130 of the housing 100. This allows maintenance personnel to access the joints of these valves from the return air side 120 without disassembling other copper pipes or other structures. Since the front panel 140 is hinged to the frame and secured by a door lock, maintenance of the fan 210 and display screen 142 can be performed simply by opening the door lock and rotating the front panel 140 to expose them. This user-friendly front and rear layout design makes maintenance and inspection of the unit equipment much easier.

[0039] In addition, the inter-row dynamic dual-source air conditioner 10 also includes a liquid pipe 300 connected to the refrigerant channel and an expansion valve connected to the liquid pipe 300. The expansion valve is connected to the refrigerant coil 262, and a sight glass 400 is installed on the liquid pipe 300. In this embodiment, the expansion valve is electrically connected to the electrical control box 240. The expansion valve is used to reduce the pressure of the high-pressure liquid refrigerant to a low-temperature, low-pressure two-phase flow by throttling and reducing pressure, so as to control the flow rate of the refrigerant entering the refrigerant coil 262, thereby accurately matching the refrigerant flow rate to the load of the refrigerant coil 262. The sight glass 400 is used to observe the state of the refrigerant in the liquid pipe 300. In this way, maintenance personnel can observe the sight glass 400 and judge the state of the refrigerant based on the liquid fill (presence or absence of bubbles) and color change (indicating the state of the desiccant, such as green indicating that the desiccant is normal and yellow indicating that the desiccant is saturated with moisture) to respond promptly to air conditioning malfunctions.

[0040] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0041] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An inter-row dynamic dual cold source air conditioner for being disposed between and connected to adjacent server cabinets, characterized in that, include: The chassis has a front side for air supply and a rear side for air return. A refrigeration unit, housed within a chassis cavity, includes a fan on the supply air side, a compressor, a plate heat exchanger, an electrical control box, and a power supply electrically connected to the electrical control box on the return air side, and an evaporator assembly located between the supply air side and the return air side. The evaporator assembly includes a water coil and a refrigerant coil. The plate heat exchanger has a refrigerant channel and a water channel separated by heat exchange plates. One end of the refrigerant channel is connected to the exhaust end of the compressor, and the other end is connected to the refrigerant coil. The refrigerant coil is connected to the inlet end of the compressor. The inlet end of the water channel is connected to an external cooling water pipe, and the outlet end is connected to an external cooling device. The inlet end of the water coil is connected to an external chilled water supply pipe, and the outlet end is connected to an external return water network. The fan and the compressor are respectively electrically connected to the electrical control box.

2. The inter-row dynamic dual cold source air conditioner according to claim 1, characterized in that, The inter-row dynamic dual-cooling-source air conditioner also includes a valve assembly disposed on the return air side. The valve assembly includes a first two-way valve, a second two-way valve, and a three-way valve electrically connected to the electrical control box. The two ends of the first two-way valve are respectively connected to the water channel and the external cooling water pipe. The inlet end of the second two-way valve is used to connect to the external chilled water supply pipe. The outlet end of the second two-way valve is connected to the first pipe of the three-way valve. The second pipe of the three-way valve is connected to the water coil. The water coil is connected to the external return water network through the chilled water return pipe. The third pipe of the three-way valve is connected to the chilled water return pipe through a connecting branch pipe.

3. The inter-row dynamic dual cold source air conditioner according to claim 1, characterized in that, The water coil and the refrigerant coil together form an evaporator assembly with a V-shaped or straight structure.

4. The inter-row dynamic dual cold source air conditioner according to claim 1, characterized in that, The water coil is installed on the refrigerant coil on the side near the return air side. 5.The inter-row dynamic dual-cold-source air conditioner according to claim 1, characterized in that, The chassis includes a frame, a front panel detachably mounted on the front side of the frame, a rear panel detachably mounted on the rear side of the frame, two side panels detachably mounted on the left and right sides of the frame, a top plate detachably mounted on the top of the frame, and a bottom plate detachably mounted on the bottom of the frame. The frame, the front panel, the rear panel, the two side panels, the top plate, and the bottom plate together form a housing space for housing the refrigeration unit. The front panel has several exhaust holes communicating with the housing space, and the rear panel has several air inlets communicating with the housing space. 6.The inter-row dynamic dual-cold-source air conditioner according to claim 5, characterized in that, The front panel is equipped with a display screen that is electrically connected to the electrical control box. 7.The inter-row dynamic dual cold-source air conditioner according to claim 5, characterized in that, The air supply side is provided with a plurality of fans arranged in an array along the height direction of the front panel. 8.The inter-row dynamic dual cold-source air conditioner according to claim 5, characterized in that, The side panel is equipped with a cabinet connection piece for connecting to the server rack. 9.The inter-row dynamic dual cold-source air conditioner according to claim 1, characterized in that, The chassis is equipped with slide rails and a tray that is slidably mounted on the slide rails, and the compressor is mounted on the tray. The chassis is equipped with guide rails, and the electrical control box and the power supply are slidably inserted into the guide rails; or the chassis is equipped with a pull-out tray, and the electrical control box and the power supply are mounted on the tray. 10.The inter-row dynamic dual cold-source air conditioner according to claim 1, characterized in that, The inter-row dynamic double cold source air conditioner further comprises a liquid pipe communicated with the refrigerant channel, an expansion valve communicated with the liquid pipe, the expansion valve being communicated with the fluorine coil pipe, and a sight glass being installed on the liquid pipe.

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