Patent Publication Number: US-2022225544-A1

Title: Refrigeration Device and Data Center

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This claims priority to Chinese Patent Application No. 202110032035.3 filed on Jan. 11, 2021, which is hereby incorporated by reference in its entirety. 
     TECHNICAL FIELD 
     This disclosure relates to the field of refrigeration technologies, and in particular, to a refrigeration device and a data center. 
     BACKGROUND 
     Rapid development of fifth generation (5G) and edge computing brings along a burst of deployment of edge node equipment rooms. Devices in edge node equipment rooms cover fields such as access, transmission, and data communication. Cabinet forms vary from one another, for example, a side-exhaust cabinet and a top-exhaust cabinet, leading to different air duct types. In addition, power consumption of cabinets is further increased compared with that in the past, and a thermal design of equipment rooms faces many challenges. A current equipment room constructor usually adopts a solution of an external integrated refrigeration device or a room-level split refrigeration device. For example,  FIG. 1  is a schematic application diagram of refrigeration devices in conventional technologies. Cabinets  3  are disposed side by side in an equipment room  2 . A refrigeration device  1  is fixed to a side wall of the equipment room  2 , and a refrigeration device  2  uses a side-supply side-return air duct form. Therefore, the refrigeration devices are adapted to only a top-exhaust cabinet during air supply, while a problem of compatibility with a side-exhaust cabinet still exists. In an equipment room in the conventional technologies, there are cabinets with different hot air exhausting manners. Therefore, adaptability of the refrigeration device  1  is comparatively poor, affecting normal use of the edge node equipment room. 
     SUMMARY 
     This disclosure provides a refrigeration device and a data center, to adapt to heat dissipation of different types of cabinets. 
     According to a first aspect, a refrigeration device is provided. The refrigeration device is configured to adapt to different heat dissipation requirements of cabinets in a data center. The refrigeration device includes an indoor unit and an outdoor unit. The indoor unit is used for heat exchange with air inside an equipment room. The outdoor unit is used for heat exchange with the indoor unit, to transfer heat inside the equipment room to the outside. Existing cabinets include top-exhaust or side-exhaust cabinets. To adapt to different cabinets, ventilation ducts of the indoor unit in this disclosure are improved. The indoor unit includes a first ventilation duct and a second ventilation duct that are arranged along a direction leaving the top of a cabinet. The first ventilation duct and the second ventilation duct communicate with each other through a first ventilation opening. The indoor unit further includes a first evaporation assembly disposed in the first ventilation duct and a second evaporation assembly disposed in the second ventilation duct. The first evaporation assembly and the second evaporation assembly are respectively disposed on two sides of the first ventilation opening. The indoor unit further includes a baffle assembly for adjusting air intake directions of the first ventilation duct and the second ventilation duct. The baffle assembly is configured to adjust ventilation manners of the first ventilation duct and the second ventilation duct. For example, in a first state, the baffle assembly separates the first ventilation duct from the second ventilation duct, and adjusts the first ventilation duct and the second ventilation duct to supply air in a same direction. In this case, the refrigeration device is applicable to a side-exhaust cabinet. In a second state, the baffle assembly adjusts the first ventilation duct and the second ventilation duct to separately let in air from the middles, and the first ventilation duct and the second ventilation duct to supply air in opposite directions. In this case, the refrigeration device is applicable to a top-exhaust cabinet. To dissipate heat for the first evaporation assembly and the second evaporation assembly, the outdoor unit includes a condenser that performs heat exchange with each of the first evaporation assembly and the second evaporation assembly separately. In the foregoing technical solution, the ventilation ducts of the refrigeration device are reconfigured, and the baffle assembly is disposed to change an air intake manner of the ventilation duct, so that the refrigeration device can be applied to cabinets of different hot air exhausting types, thereby improving universality of the refrigeration device. 
     In a specific implementable solution, the indoor unit further includes a third ventilation duct. The third ventilation duct penetrates the first ventilation duct and the second ventilation duct and connects the first ventilation duct to the second ventilation duct. The first ventilation opening is located in the third ventilation duct. An air intake vent of the third ventilation duct is close to the second ventilation duct. The first ventilation duct is divided into a first subchannel and a second subchannel by the third ventilation duct. The second ventilation duct is divided into a third subchannel and a fourth subchannel by the third ventilation duct. The first subchannel and the fourth subchannel are respectively located on two sides of the third ventilation duct. The first evaporation assembly is located in the first subchannel, and the second evaporation assembly is located in the second subchannel. In the first state, the baffle assembly connects the first subchannel to the second subchannel, connects the second subchannel to the fourth subchannel, and blocks the air intake vent of the third ventilation duct. In the second state, the baffle assembly connects each of the first subchannel and the fourth subchannel to the third ventilation duct, and separates each of the second subchannel and the third subchannel from the third ventilation duct. In addition, the first subchannel and the fourth subchannel both let in air through the third ventilation duct. Through cooperation between the disposed third ventilation duct and the baffle assembly, a ventilation manner of the indoor unit is adjusted, to adapt to different cabinets. 
     In a specific implementable solution, the indoor unit further includes a housing with two ends having openings. A partition board is disposed in the housing, and a cavity in the housing is divided into the first ventilation duct and the second ventilation duct by the partition board. A second ventilation opening is disposed on a first side wall that is of the housing and that faces the cabinet. The first ventilation opening is disposed on the partition board. The second ventilation opening and the first ventilation opening communicate with each other and are located in the third ventilation duct. The second ventilation opening is the air intake vent of the third ventilation duct. The ventilation duct is formed by using the housing and the partition board. 
     In a specific implementable solution, the housing and the partition board may be of an integrated structure. This enhances structural strength of the indoor unit. 
     In a specific implementable solution, the baffle assembly includes a first baffle, a second baffle, and a third baffle. The first baffle and the second baffle are separately connected to the partition board in a rotatable manner. The third baffle is connected to the first side wall and is configured to block the second ventilation opening. In the first state, the first baffle rotates to a first specified position, the second baffle rotates to a second specified position, the first baffle and the second baffle block the first ventilation opening, the first subchannel is connected to the second subchannel, the third subchannel is connected to the fourth subchannel, and the third baffle blocks the second ventilation opening. In the second state, the first baffle rotates to a third specified position, the first baffle separates the third subchannel from the third ventilation duct, the second baffle rotates to a fourth specified position, the second baffle separates the second subchannel from the third ventilation duct, and the third baffle unblocks the second ventilation opening, so that the second ventilation opening is open. A ventilation manner of the ventilation duct is changed by using the disposed first baffle, second baffle, and third baffle. 
     In a specific implementable solution, the baffle assembly further includes a first driving mechanism for driving the first baffle to rotate and be locked in the first specified position or the third specified position, and a second driving mechanism for driving the second baffle to rotate and be locked in the second specified position or the fourth specified position. In this way, the first baffle and the second baffle are controlled. 
     In a specific implementable solution, both the first driving mechanism and the second driving mechanism are stepper motors. 
     In a specific implementable solution, the third baffle is connected to the first side wall in a slidable manner. In addition, in the first state, the third baffle slides to a seventh specified position. The third baffle is connected to the first side wall in a slidable manner. In addition, in the first state, the third baffle slides to a fifth specified position, and the third baffle blocks the second ventilation opening, and in the second state, the third baffle slides to a sixth specified position, and the second ventilation opening is open. The third baffle is connected to the first side wall in the slidable manner, so as to unblock or block the second ventilation opening. 
     In a specific implementable solution, the baffle assembly further includes a third driving mechanism for driving the third baffle to slide and be locked in the fifth specified position or the sixth specified position. The third driving mechanism is used, so that the third baffle is driven to slide and be locked. 
     In a specific implementable solution, the third driving mechanism includes a motor and a transmission assembly, and the transmission assembly may be a lead screw assembly, a gear rack assembly, a transmission belt assembly, or the like. 
     In a specific implementable solution, the third baffle is connected to the first side wall in a rotatable manner. In addition, in the first state, the third baffle rotates to a seventh specified position, and the third baffle blocks the second ventilation opening, and in the second state, the third baffle rotates to an eighth specified position, and the second ventilation opening is open. The third baffle rotates relative to the first side wall, to unblock or block the second ventilation opening. 
     In a specific implementable solution, the first evaporation assembly includes a first evaporator and a first fan that are disposed side by side, and the second evaporation assembly includes a second evaporator and a second fan that are disposed side by side. An air supply effect is improved by using the fan. 
     In a specific implementable solution, the first fan may be located on different sides of the first evaporator, and the second fan may be located on different sides of the second evaporator. 
     In a specific implementable solution, the refrigeration device further includes a controller. In the first state, the controller controls the first fan and the second fan to separately supply air in a same direction. In the second state, the controller controls the first fan and the second fan to supply air in opposite directions. Air supply directions of the first fan and the second fan are controlled by using the controller. 
     According to a second aspect, a data center is provided. The data center includes an equipment room and cabinets disposed in the equipment room, and further includes the refrigeration device configured to dissipate heat for the cabinets according to any one of the foregoing solutions. The refrigeration device is disposed on the top of the equipment room, and is located above the cabinets. In the foregoing technical solution, ventilation ducts of the refrigeration device are reconfigured, and a baffle assembly is disposed to change an air intake manner of the ventilation duct, so that the refrigeration device can be applied to cabinets of different hot air exhausting types, thereby improving universality of the refrigeration device. 
     In a specific implementable solution, the cabinet is a side-intake top-exhaust cabinet, two of the cabinets are disposed side by side, and air intake sides of the two cabinets are disposed oppositely, and the baffle assembly is in a second state, a first ventilation duct and a second ventilation duct let in air from the middles, and an air intake direction of the first ventilation duct faces the tops of the two cabinets. 
     In a specific implementable solution, the cabinet is a cabinet that lets in cold air from one side and exhausts hot air from another side, the cabinets are disposed in a single row, and the baffle assembly is in a first state, a ventilation direction of the first ventilation duct is the same as that of the second ventilation duct, and the ventilation direction of the first ventilation duct is the same as that of the cabinet. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  is a schematic application diagram of refrigeration devices in conventional technologies; 
         FIG. 2  is a schematic diagram of a structure of a top-exhaust mechanism; 
         FIG. 3  is a schematic diagram of a structure of a side-exhaust mechanism; 
         FIG. 4  is a schematic diagram of an application scenario of a refrigeration device according to an embodiment of this disclosure; 
         FIG. 5  is a schematic diagram of a structure of a refrigeration device according to an embodiment of this disclosure; 
         FIG. 6  is a schematic diagram of a structure of an indoor unit according to an embodiment of this disclosure; 
         FIG. 7  is a schematic diagram of a structure of a refrigeration device in a first state according to an embodiment of this disclosure; 
         FIG. 8  is a schematic diagram of an application scenario of a refrigeration device in a first state according to an embodiment of this disclosure; 
         FIG. 9  is a schematic diagram of a structure of a refrigeration device in a second state according to an embodiment of this disclosure; 
         FIG. 10  is a schematic diagram of an application scenario of a refrigeration device in a second state according to an embodiment of this disclosure; 
         FIG. 11  is a schematic diagram of another refrigeration device according to an embodiment of this disclosure; 
         FIG. 12  is a schematic diagram of a structure of another refrigeration device in a first state according to an embodiment of this disclosure; and 
         FIG. 13  is a schematic diagram of a structure of another refrigeration device in a second state according to an embodiment of this disclosure. 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     For ease of understanding a refrigeration device provided in embodiments of this disclosure, an application scenario of the refrigeration device provided in the embodiments of this disclosure is first described. The refrigeration device provided in the embodiments of this disclosure is applied to heat dissipation of a cabinet in an equipment room. Based on ventilation manners, cabinets may be classified into top-exhaust cabinets and side-exhaust cabinets. 
       FIG. 2  shows a ventilation manner of a top-exhaust cabinet  200 . Solid-line arrows in  FIG. 2  show an example of air flow directions during heat dissipation of the top-exhaust cabinet  200 . An air intake vent of the top-exhaust cabinet  200  is disposed on one side of the cabinet, and an air exhaust vent of the cabinet is disposed on the top of the cabinet. During heat dissipation, air enters the cabinet from the one side of the cabinet and flows out from the top of the cabinet. When top-exhaust cabinets  200  are disposed in an equipment room  100 , the top-exhaust cabinets  200  may be disposed side by side in a back-to-back manner. 
       FIG. 3  shows a ventilation manner of a side-exhaust cabinet. Solid-line arrows in  FIG. 3  show an example of air flow directions during heat dissipation of the side-exhaust cabinet  300 . An air intake vent and an air exhaust vent of the side-exhaust cabinet  300  are disposed on two opposite sides of the cabinet. During heat dissipation, air enters the cabinet from one side of the cabinet and flows out from a side opposite the side. If side-exhaust cabinets  300  are disposed in an equipment room  100 , the cabinets need to be arranged in a single row, to avoid blocking of an air exhaust vent. 
     During cabinet disposition in an existing equipment room, the top-exhaust cabinet  200  shown in  FIG. 2  may be disposed, and the side-exhaust cabinet  300  shown in  FIG. 3  may also be disposed. However, a refrigeration device in conventional technologies cannot adapt to the foregoing two types of cabinets at the same time. Therefore, the embodiments of this disclosure provide a refrigeration device that can change an air intake manner, to adapt to cabinets with the foregoing two different hot air exhausting manners. The following provides descriptions with reference to specific views. 
       FIG. 4  is a schematic diagram of an application scenario of a refrigeration device  400  according to an embodiment of this disclosure. The refrigeration device  400  is disposed on a top plate of an equipment room  100 . The refrigeration device  400  includes an indoor unit  410  and an outdoor unit  420 . The indoor unit  410  is fixed to the top plate of the equipment room  100  and is located inside the equipment room  100 . The outdoor unit  420  is fixed to the top plate of the equipment room  100  and is located outside the equipment room  100 . When working, the indoor unit  410  performs heat exchange with a cabinet (using the side-exhaust cabinet  300  as an example), to take away heat produced by the cabinet. The outdoor unit  420  performs heat exchange with the indoor unit  410 , and transfers heat of the indoor unit  410  out of the equipment room  100 , to dissipate heat for the cabinet  300 . 
       FIG. 5  is a schematic diagram of a structure of a refrigeration device according to an embodiment of this disclosure. For ease of description, a top plate of an equipment room is introduced as a reference plane, to describe the refrigeration device. 
     An outdoor unit  420  includes a condenser  422  and a fan  421 . The fan  421  and the condenser  422  are disposed in a stacked manner. An air intake channel  423  is disposed below the condenser  422 . The fan  421  drives air to flow through the air intake channel  423  into the condenser  422  for heat exchange. 
     An indoor unit  410  includes ventilation ducts and evaporation assemblies. The ventilation ducts include a first ventilation duct  411  and a second ventilation duct  412 . The evaporation assemblies include a first evaporation assembly  413  and a second evaporation assembly  414 . The first evaporation assembly  413  is disposed in the first ventilation duct  411 , and the second evaporation assembly  414  is disposed in the second ventilation duct  412 . 
       FIG. 6  is a schematic diagram of a structure of an indoor unit. The indoor unit includes a housing  417 . The housing  417  has a cavity extending along a first direction. In addition, two end portions of the housing  417  in the first direction have openings, so that the cavity communicates with the outside of the housing  417 , and ventilation ducts are formed. The first direction is a direction parallel to or approximately parallel to a top plate of an equipment room. 
     A partition board  416  is disposed in the housing  417 . The partition board  416  divides the cavity into a first ventilation duct  411  and a second ventilation duct  412 . The first ventilation duct  411  and the second ventilation duct  412  are disposed along a second direction. The second direction is a direction perpendicular to the top plate of the equipment room, and the first direction is perpendicular to the second direction. A first ventilation opening  4161  is disposed on the partition board  416 . The first ventilation duct  411  and the second ventilation duct  412  communicate with each other through the first ventilation opening  4161 . 
     A manner of connection between the partition board  416  and the housing  417  is not limited in this disclosure. The partition board  416  and the housing  417  may be of an integrated structure. Alternatively, the partition board  416  is fixedly connected to the housing  417  by using a connecting piece (a bolt, a screw, a rivet, or the like). Alternatively, the partition board  416  is fixedly connected to the housing  417  through welding or clamping. 
     The housing  417  has a first side wall facing a cabinet. A second ventilation opening  4171  is disposed on the first side wall. The second ventilation opening  4171  is close to the second ventilation duct  412 . Refer to  FIG. 6 . It can be seen that the second ventilation opening  4171  and the first ventilation opening  4161  are stacked along the second direction. For ease of description, a channel through which the first ventilation opening  4161  communicates with the second ventilation opening  4171  is referred to as a third ventilation duct  415 . The third ventilation duct  415  extends along the second direction. Both the first ventilation opening  4161  and the second ventilation opening  4171  are located in the third ventilation duct  415 , and the second ventilation opening  4171  serves as an air intake vent of the third ventilation duct  415 . 
     It should be understood that, in this embodiment of this disclosure, opening areas and shapes of the first ventilation opening  4161  and the second ventilation opening  4171  are not limited, and the shapes and opening areas of the two ventilation openings may be the same or may be different. For example, both the first ventilation opening  4161  and the second ventilation opening  4171  may be round, rectangular, or the like, or the first ventilation opening  4161  is round and the second ventilation opening  4171  is rectangular. 
     The third ventilation duct  415  penetrates the first ventilation duct  411  and the second ventilation duct  412 , and connects the first ventilation duct  411  to the second ventilation duct  412 . It can be seen from  FIG. 6  that the first ventilation duct  411  and the second ventilation duct  412  extend along the first direction, and the third ventilation duct  415  extends along the second direction, so that a “T”-shaped arrangement pattern is formed. The first ventilation duct  411  is divided into a first subchannel  4111  and a second subchannel  4112  by the third ventilation duct  415 . The second ventilation duct  412  is divided into a third subchannel  4121  and a fourth subchannel  4122  by the third ventilation duct  415 . The first subchannel  4111  and the third subchannel  4121  are located on one side of the third ventilation duct  415 . The second subchannel  4112  and the fourth subchannel  4122  are located on another side of the third ventilation duct  415 . The first subchannel  4111  and the fourth subchannel  4122  are respectively disposed on two opposite sides of the third ventilation duct  415 , and are diagonally arranged. 
     The indoor unit further includes a first evaporation assembly  413  and a second evaporation assembly  414  that are used for heat exchange with the cabinet. The first evaporation assembly  413  is disposed in the first ventilation duct  411 . The second evaporation assembly  414  is disposed in the second ventilation duct  412 . When the first ventilation duct  411  and the second ventilation duct  412  are divided into different subchannels by the third ventilation duct  415 , the first evaporation assembly  413  and the second evaporation assembly  414  are located on two opposite sides of the third ventilation duct  415 , and are diagonally disposed. Further, the first evaporation assembly  413  is located in the first subchannel  4111 , and the second evaporation assembly  414  is located in the fourth subchannel  4122 . 
     For example, the first evaporation assembly  413  includes a first evaporator  4132  and a first fan  4131  that are disposed side by side, and the first evaporator  4132  and the first fan  4131  are arranged along the first direction. A placement direction of the first evaporation assembly  413  shown in  FIG. 6  is used as a reference direction, and the first fan  4131  is located to the left of the first evaporator  4132 . However, relative positions of the first evaporator  4132  and the first fan  4131  are not limited in this disclosure. The first fan  4131  may be alternatively located to the right of the first evaporator  4132 . 
     The second evaporation assembly  414  includes a second evaporator  4142  and a second fan  4141  that are disposed side by side. For an arrangement direction of the second evaporator  4142  and the second fan  4141 , refer to an arrangement direction of the first evaporator  4132  and the first fan  4131 . Details are not described herein again. 
     The indoor unit further includes a baffle assembly. The baffle assembly is configured to adjust ventilation directions of the first ventilation duct  411  and the second ventilation duct  412 , to adapt to the two different types of cabinets shown in  FIG. 2  and  FIG. 3 . The baffle assembly includes a first baffle  4181 , a second baffle  4182 , and a third baffle  4183 . To adapt to different types of cabinets, communication manners of the first ventilation duct  411 , the second ventilation duct  412 , and the third ventilation duct  415  are changed through cooperation among the first baffle  4181 , the second baffle  4182 , and the third baffle  4183 , to implement air intake in different directions. The following describes the three baffles one by one. 
     The first baffle  4181  is connected to a first side wall of the first ventilation opening  4161  in a rotatable manner, and the second baffle  4182  is connected to a second side wall of the first ventilation opening  4161  in a rotatable manner. The first side wall of the first ventilation opening  4161  is a side wall, of the first ventilation opening  4161 , close to the first subchannel  4111 . The second side wall is a side wall, of the first ventilation opening  4161 , close to the second subchannel  4112 . The first side wall and the second side wall are oppositely disposed. When the first baffle  4181  and the second baffle  4182  rotate relative to the first ventilation opening  4161 , the first baffle  4181  rotates toward the inside of the second ventilation duct  412 , and the second baffle  4182  rotates toward the inside of the first ventilation duct  411 . When the foregoing structure is used, the first baffle  4181  and the second baffle  4182  may be equivalent to leaves of a double door, and the first ventilation opening  4161  may be equivalent to a door frame. When the first baffle  4181  and the second baffle  4182  rotate relative to the first ventilation opening  4161 , an action similar to door leaf opening/closing is formed, and the first ventilation opening  4161  is opened or closed through rotation of the first baffle  4181  and the second baffle  4182 . 
     Different driving structures may be used to drive the first baffle  4181  to rotate. The baffle assembly further includes a first driving mechanism for driving the first baffle  4181  to rotate and be locked in a specified position. For example, the first driving mechanism may be a stepper motor. The stepper motor may drive the first baffle  4181  to rotate, and lock the first baffle  4181  after the rotation stops. It should be understood that the stepper motor is merely a driving mechanism used as a specific example, and another driving mechanism may be alternatively used to drive the first baffle  4181  to rotate. The second baffle  4182  may be driven in a same manner as the first baffle  4181 . The baffle assembly further includes a second driving mechanism for driving the second baffle  4182  to rotate and be locked in a specified position. For details, refer to the descriptions of the first driving mechanism. Details are not described herein again. 
     The third baffle  4183  is configured to block the second ventilation opening  4171 . Referring to the structure shown in  FIG. 6 , the third baffle  4183  is connected to the first side wall of the housing  417  in a slidable manner. The first side wall is a side wall that faces the cabinet after the indoor unit is installed in the equipment room. The third baffle  4183  is connected to the first sidewall of the housing  417  in a slidable manner, and is configured to block or open the second ventilation opening  4171 . 
     The third baffle  4183  is driven by using a third driving mechanism. The third driving mechanism may be implemented through cooperation between a linear motor, a drive motor, and a transmission assembly. The transmission assembly may be a common transmission assembly such as a gear rack assembly, a lead screw assembly, or a transmission belt assembly. 
     When the first baffle  4181 , the second baffle  4182 , and the third baffle  4183  are in different specified positions, the baffle assembly is correspondingly in different states, and a ventilation direction of the indoor unit is also in different states. The following describes cooperation among the first baffle  4181 , the second baffle  4182 , and the third baffle  4183  in detail with reference to specific accompanying drawings. 
       FIG. 7  is a schematic diagram of the baffle assembly in a first state. When the baffle assembly is in the first state, both the first baffle  4181  and the second baffle  4182  rotate to the first ventilation opening and block the first ventilation opening, and the third baffle  4183  blocks the second ventilation opening. For ease of description, a position of the first baffle  4181  is defined as a first specified position, a position of the second baffle  4182  is defined as a second specified position, and a position of the third baffle  4183  is defined as a fifth specified position. 
     When the first baffle  4181  is in the first specified position and the second baffle  4182  is in the second specified position, the first baffle  4181  and the second baffle  4182  isolate the first ventilation duct  411  from the second ventilation duct  412 . The first subchannel  4111  and the second subchannel  4112  of the first ventilation duct  411  communicate with each other. The third subchannel  4121  and the fourth subchannel  4122  of the second ventilation duct  412  communicate with each other. The third ventilation duct is partitioned by the first baffle  4181  and the second baffle  4182 , and the air intake vent (the second ventilation opening) of the third ventilation duct is shut off by the third baffle  4183 . 
     Lines with arrowheads in  FIG. 7  show air flow directions in the indoor unit. In the first ventilation duct  411 , air flows in a direction from the first subchannel  4111  to the second subchannel  4112 , and heat exchange is performed for the air by using the first evaporation assembly  413 . In the second ventilation duct  412 , air flows in a direction from the third subchannel  4121  to the fourth subchannel  4122 , and heat dissipation is performed for the air by using the second evaporation assembly  414 . 
       FIG. 8  is a schematic diagram of an application scenario of the indoor unit in the state shown in  FIG. 7  in the equipment room. The refrigeration device in the state shown in  FIG. 7  is applicable to the side-exhaust cabinet  300 . 
     The first subchannel  4111  and the third subchannel  4121  are close to an air exhaust vent of the cabinet  300 , and the second subchannel  4112  and the fourth subchannel  4122  are close to an air intake vent of the cabinet  300 . During formation of an air cycle, cold air flows out from the second subchannel  4112  and the fourth subchannel  4122 , and then flows into the air intake vent of the cabinet  300 , the cold air exchanges heat with devices in the cabinet  300 , formed hot air flows out of the air exhaust vent of the cabinet  300 , and then flows into the first subchannel  4111  and the third subchannel  4121 , and after heat exchange is performed for the hot air by using the first evaporation assembly  413  and the second evaporation assembly  414 , cold air is formed. In this way, one air cycle is formed. The first evaporation assembly  413  and the second evaporation assembly  414  communicate with the condenser  422 . Liquid flows in a loop formed by the condenser  422  and the evaporators (the first evaporation assembly  413  and the second evaporation assembly  414 ). High-temperature liquid in the first evaporation assembly  413  and the second evaporation assembly  414  flows into the condenser  422 , and exchanges heat with air outside the equipment room to form cold liquid. The cold liquid flows back into the first evaporation assembly  413  and the second evaporation assembly  414 . In this way, one liquid cycle is formed. 
       FIG. 9  is a schematic diagram of the baffle assembly in a second state. When the baffle assembly is in the second state, the first baffle  4181  and the second baffle  4182  rotate relative to the first ventilation opening  4161  to an open state, so that the first ventilation opening  4161  is open. The first baffle  4181  rotates to a position so that the third subchannel  4121  is blocked, to separate the third subchannel  4121  from the third ventilation duct  415 . The second baffle  4182  rotates to a position so that the second subchannel  4112  is blocked, to separate the second subchannel  4112  from the third ventilation duct  415 . In the second state, the third ventilation duct  415  communicates with the first subchannel  4111 , and the third ventilation duct  415  communicates with the fourth subchannel  4122 . In addition, the third baffle  4183  unblocks the second ventilation opening  4171 , so that the second ventilation opening  4171  is connected to the second ventilation duct  412 . For ease of description, the position of the first baffle  4181  is defined as a third specified position, the position of the second baffle  4182  is defined as a fourth specified position, and a position of the third baffle  4183  is defined as a sixth specified position. 
     Lines with arrowheads in  FIG. 9  show an example of air flow directions in the indoor unit. The second ventilation opening  4171  is used as an air intake vent of the indoor unit. Air enters the third ventilation duct  415  from the second ventilation opening  4171 , and then the air is divided. A part of the air enters the fourth subchannel  4122 , and exchanges heat by using the second evaporation assembly  414 . Cooled air flows out of a port of the fourth subchannel  4122  facing away from the third ventilation duct  415 . Another part of the air enters the first subchannel  4111 , and exchanges heat by using the first evaporation assembly  413 . Cooled air flows out of a port of the first subchannel  4111  facing away from the third ventilation duct  415 . From arrows shown in  FIG. 9 , it can be seen that air may flow out separately in two opposite directions when flowing out of the indoor unit. 
       FIG. 10  is a schematic diagram of an application scenario of the indoor unit in the state shown in  FIG. 9  in the equipment room. The refrigeration device in the state shown in  FIG. 9  is applicable to top-exhaust cabinets, and the top-exhaust cabinets are arranged side by side. The second ventilation opening of the indoor unit faces air exhaust vents located at the tops of the two cabinets. For ease of description, the two cabinets are respectively referred to as a first cabinet  201  and a second cabinet  202 . During formation of an air cycle, hot air flowing out of the air exhaust vents at the tops of the first cabinet  201  and the second cabinet  202  enters the third ventilation duct  415  through the second ventilation opening, the first fan  4131  draws air to a side of the first subchannel  4111  facing away from the third ventilation duct  415 , and a part of the hot air is drawn into the first evaporator  4132  for heat exchange, and cold air obtained through heat exchange flows out of the first subchannel  4111 , and the cold air flows into the first cabinet  201 . In this way, one air cycle is formed. Another part of the hot air enters the third ventilation duct  415  through the second ventilation opening, the second fan  4141  draws air to a side of the fourth subchannel  4122  facing away from the third ventilation duct  415 , and the hot air is drawn into the second evaporator  4142  for heat exchange, and cold air obtained through heat exchange flows out of the fourth subchannel  4122 , and the cold air flows into the second cabinet  202 . In this way, one air cycle is formed. For manners of heat exchange of the first evaporator  4132  and the second evaporator  4142  with the condenser  422 , refer to related descriptions in  FIG. 8 . Details are not described herein again. 
     It can be seen from  FIG. 8  and  FIG. 10  that the refrigeration device provided in the embodiments of this disclosure may be applied to different scenarios. During heat dissipation for cabinets with different hot air exhausting manners, the refrigeration device may select different states for the baffle assembly based on the hot air exhausting manners of the cabinets. When the cabinet in the equipment room is changed from the cabinet shown in  FIG. 8  to the cabinet shown in  FIG. 10 , a state of the baffle assembly may be changed from the first state to the second state, to change a ventilation manner of the indoor unit. Further, the first baffle rotates from the first specified position to the third specified position, the second baffle rotates from the second specified position to the fourth specified position, and the third baffle slides from the fifth specified position to the sixth specified position. In this way, the ventilation ducts of the indoor unit form a pattern of letting in cold air from the middle that connects the ducts at the tops of the first cabinet  201  and the second cabinet  202 , and exhausting hot air from two sides. In addition, a rotation direction of the first fan is changed, so that an air exhaust direction of the first fan changes from a direction approaching the first evaporator to a direction leaving the first evaporator. A rotation direction of the second fan remains an original direction. Similarly, when the cabinet in the equipment room is changed from the cabinet shown in  FIG. 10  to the cabinet shown in  FIG. 8 , a state of the baffle assembly may be changed from the second state to the first state, so as to adapt to a ventilation manner of the cabinet shown in  FIG. 8 . Details are not described herein again. 
     It should be understood that, in a rotation process of the first baffle, the first driving mechanism may drive the first baffle to rotate, and may lock the first baffle in the first specified position or the third specified position, in a rotation process of the second baffle, the second driving mechanism may drive the second baffle to rotate, and may lock the second baffle in the second specified position or the fourth specified position, and in a sliding process of the third baffle, the third driving mechanism may lock the third baffle in the fifth specified position or the sixth specified position. 
     For ease of controlling the first fan and the second fan, the refrigeration device provided in the embodiments of this disclosure may further include a controller (not shown), and the controller is configured to control rotation directions of the first fan and the second fan. For example, in the first state, the controller controls the first fan and the second fan to separately supply air in a same direction. As shown in  FIG. 8 , both the first fan and the second fan supply air in a direction from the first subchannel to the second subchannel. In the second state, the controller controls the first fan and the second fan to supply air in opposite directions. As shown in  FIG. 10 , the first fan supplies air in a direction from the second subchannel to the first subchannel, and the second fan supplies air in a direction from the first subchannel to the second subchannel. In this way, the first fan and the second fan can match a disposition manner of the ventilation ducts of the indoor unit. 
     In a solution, the controller may further control the first driving mechanism, the second driving mechanism, and the third driving mechanism, so that linkage is implemented among the first baffle, the second baffle, and the third baffle. For example, when the baffle assembly needs to be in the first state, a control instruction may be issued by using the controller, to control the first driving mechanism to drive the first baffle to rotate to the first specified position and lock the first baffle, control the second driving mechanism to drive the second baffle to rotate to the second specified position and lock the second baffle, and control the third driving mechanism to drive the third baffle to slide to the fifth specified position and lock the third baffle. Similarly, when the baffle assembly needs to be in the second state, control may also be implemented by using an instruction issued by the controller. It should be understood that the controller may be a conventional industrial computer, a programmable logic controller (PLC), or a single-chip microcomputer, and a control component of the controller performs a corresponding action in a conventional control manner. Details are not described herein. 
     It can be learned from the foregoing descriptions that, in the refrigeration device provided in the embodiments of this disclosure, in the first state, the baffle assembly separates the first ventilation duct from the second ventilation duct, and adjusts the first ventilation duct and the second ventilation duct to supply air in a same direction, so that the refrigeration device is applicable to a side-exhaust cabinet, and in the second state, the baffle assembly adjusts the first ventilation duct and the second ventilation duct to separately let in air from the middles, and the first ventilation duct and the second ventilation duct to supply air in opposite directions, so that the refrigeration device is applicable to a top-exhaust cabinet. The refrigeration device is adjusted to be in different states, thereby improving applicability of the refrigeration device. 
       FIG. 11  shows a variant structure that is based on the refrigeration device shown in  FIG. 5 . For some of reference signs in  FIG. 11 , refer to the same reference signs in  FIG. 5 . Based on the refrigeration device shown in  FIG. 5 , the refrigeration device provided in this embodiment of this disclosure may alternatively control opening or closing of the second ventilation opening  4171  in a manner of connecting the third baffle  4183  to the first side wall of the housing  417  in a rotatable manner. 
     For example, when the baffle assembly is in the first state, the third baffle  4183  rotates to a seventh specified position, where the seventh specified position is a position in which the third baffle  4183  blocks the second ventilation opening  4171 , and when the baffle assembly is in the second state, the third baffle  4183  rotates to an eighth specified position, where the eighth specified position is a position in which the third baffle  4183  avoids the second ventilation opening  4171 , and in this state, the third baffle  4183  unblocks the second ventilation opening  4171 , so that the second ventilation opening  4171  is open. During rotation of the third baffle  4183 , a same driving mechanism as that of the first baffle  4181  and the second baffle  4182  may be used, and details are not described herein again. 
     With reference to  FIG. 5  and  FIG. 11 , it can be learned that, in this embodiment of this disclosure, a specific moving manner of the third baffle  4183  is not limited, provided that the third baffle  4183  is connected to the first side wall of the housing  417  and can be used for blocking the second ventilation opening. In addition to the connection manners shown in  FIG. 5  and  FIG. 11 , the third baffle  4183  may be connected to the first side wall of the housing  417  in other manners, which are not enumerated herein. 
       FIG. 12  and  FIG. 13  show another variant structure that is based on the refrigeration device shown in  FIG. 5 . For some of reference signs in  FIG. 12  and  FIG. 13 , refer to the same reference signs shown in  FIG. 5 . 
       FIG. 12  shows a state in which the refrigeration device is applicable to a top-exhaust cabinet. The refrigeration device shown in  FIG. 12  includes a plurality of evaporation assemblies. A first evaporation assembly  413  and a third evaporation assembly  418  are disposed in a first ventilation duct  411 , and the first evaporation assembly  413  and the third evaporation assembly  418  are respectively disposed on two sides of a first ventilation opening  4161 . A fourth evaporation assembly  419  and a second evaporation assembly  414  are disposed in a second ventilation duct  412 , and the second evaporation assembly  414  and the fourth evaporation assembly  419  are respectively disposed on two sides of the first ventilation opening  4171 . 
     A baffle assembly includes a third baffle  4183  and a fourth baffle  4184 . The fourth baffle  4184  is connected to a partition board  416  in a slidable manner, and the third baffle  4183  is connected to a first side wall of a housing  417  in a slidable manner. A fourth driving mechanism drives the fourth baffle  4184  to slide. The fourth driving mechanism may be the same as the foregoing third driving mechanism, and details are not described herein again. 
     In a second state, the fourth driving mechanism drives the fourth baffle  4184  to be located in a position for avoiding the first ventilation opening  4161 , and the third driving mechanism drives the third baffle  4183  to be located in a position for avoiding the second ventilation opening  4171 , so that both the first ventilation opening  4161  and the second ventilation opening  4171  are open. When air flows, ventilation directions of the first evaporation assembly  413  and the third evaporation assembly  418  are opposite, ventilation directions of the fourth evaporation assembly  419  and the second evaporation assembly  414  are opposite, and a ventilation direction of the first evaporation assembly  413  is the same as that of the fourth evaporation assembly  419 . Referring to directions indicated by arrows shown in  FIG. 12 , after entering through the second ventilation opening  4171 , air may be exhausted from two sides of an indoor unit. The refrigeration device in this state may be applied to a top-exhaust cabinet. 
       FIG. 13  shows a state in which the refrigeration device is applicable to a side-exhaust cabinet. The first ventilation opening is blocked by the fourth baffle  4184 , and the second ventilation opening is blocked by the third baffle  4183 . In this state, the fourth driving mechanism drives the fourth baffle  4184  to block the first ventilation opening  4161 , and the third driving mechanism drives the third baffle  4183  to block the second ventilation opening  4171 . During ventilation, as indicated by arrow directions shown in  FIG. 13 , a ventilation direction of the first evaporation assembly  413  is the same as that of the third evaporation assembly  418 , and a ventilation direction of the second evaporation assembly  414  is the same as that of the fourth evaporation assembly  419 . In the state shown in  FIG. 13 , the refrigeration device may be applied to a side-exhaust cabinet. 
     In the refrigeration device shown in  FIG. 12  and  FIG. 13 , although a quantity of evaporation assemblies is increased, a quantity of moving components for changing a ventilation manner of the refrigeration device is decreased (a quantity of baffles is decreased), thereby improving reliability of the refrigeration device during use. 
     An embodiment of this disclosure further provides a data center. The data center includes an equipment room and cabinets disposed in the equipment room, and further includes the refrigeration device configured to dissipate heat for the cabinets according to any one of the foregoing embodiments. The refrigeration device is disposed on the top of the equipment room, and is located above the cabinets. In the foregoing technical solution, ventilation ducts of the refrigeration device are reconfigured, and the baffle assembly is disposed to change an air intake manner of the ventilation duct, so that the refrigeration device can be applied to cabinets of different hot air exhausting types, thereby improving universality of the refrigeration device. 
     Refer to  FIG. 8 . The cabinet is a cabinet that lets in cold air from one side and exhausts hot air from another side, the cabinets are disposed in a single row, and the baffle assembly of the refrigeration device is in the first state, a ventilation direction of the first ventilation duct is the same as that of the second ventilation duct, and the ventilation direction of the first ventilation duct is the same as that of the cabinet. For details, refer to related descriptions of the refrigeration device in the first state. 
     Refer to  FIG. 10 . The cabinet is a side-intake top-exhaust cabinet, two of the cabinets are disposed side by side, and air intake sides of the two cabinets are disposed oppositely, and the baffle assembly is in the second state, the first ventilation duct and the second ventilation duct let in air from the middles, and an air intake direction of the first ventilation duct faces the tops of the two cabinets. For details, refer to related descriptions of the refrigeration device in the second state. 
     It is clear that a person skilled in the art can make various modifications and variations to this disclosure without departing from the spirit and scope of this disclosure. This disclosure is intended to cover these modifications and variations of this disclosure provided that they fall within the scope of the claims of this disclosure and equivalent technologies thereof.