CN113482428A - Prefabricated modular unit and data center - Google Patents
Prefabricated modular unit and data center Download PDFInfo
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- CN113482428A CN113482428A CN202110742142.5A CN202110742142A CN113482428A CN 113482428 A CN113482428 A CN 113482428A CN 202110742142 A CN202110742142 A CN 202110742142A CN 113482428 A CN113482428 A CN 113482428A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/348—Structures composed of units comprising at least considerable parts of two sides of a room, e.g. box-like or cell-like units closed or in skeleton form
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/94—Protection against other undesired influences or dangers against fire
- E04B1/941—Building elements specially adapted therefor
- E04B1/942—Building elements specially adapted therefor slab-shaped
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H5/00—Buildings or groups of buildings for industrial or agricultural purposes
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H5/00—Buildings or groups of buildings for industrial or agricultural purposes
- E04H2005/005—Buildings for data processing centers
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Abstract
The application relates to a prefabricated modular unit and a data center. Prefabricated modular unit includes the frame and prevents the wall, prevent that the wall is connected to the wallboard that the frame constitutes prefabricated modular unit, prevent that the wall includes first layer and the second floor of range upon range of setting, the surface that the second floor was kept away from to the first layer is for preventing a surface of wall, the surface that the first layer was kept away from to the second layer is for preventing another surface of wall, the second layer is located one side of the inner space of prefabricated modular unit of first layer orientation, the yield strength of first layer is greater than or equal to the yield strength of second layer, the fire endurance of second layer is greater than or equal to the fire endurance of first layer. The firewall has good fireproof performance and high strength.
Description
Technical Field
The invention relates to the technical field of prefabricated modular data centers, in particular to a prefabricated modular unit and a data center.
Background
The construction requirements of the data center are increased explosively due to the brisk development of the industries such as the internet, big data, cloud computing, the internet of things and artificial intelligence, the requirements of the times cannot be met gradually due to the characteristics of long construction period, poor flexibility, high cost, inconvenience in maintenance and management and the like of the traditional data center construction mode, and the prefabricated modular data center is produced at the same time. The prefabricated modular data center is used as a new mode for data center construction, adopts a modular design concept, overcomes various physical scenes and business scenes which cannot be met by the traditional civil engineering mode data center, can be directly applied outdoors, and has the remarkable advantages of rapid deployment and flexible capacity expansion.
Because prefabricated modular data center adopts the container to pile up, and current container piles up the scheme and does not have the fire prevention and separation heat propagation mode, and the side wall is the plane steel sheet, needs concrete pouring in addition to prevent fires, leads to the engineering time overlength, and can't promote container module intensity.
Therefore, there is a need for a fire wall that can effectively prevent the spread of fire and has high strength characteristics to meet the requirements of transportation and earthquake resistance.
Disclosure of Invention
The embodiment of the application provides a prefabricated modular unit and data center, uses the prefabricated modular unit that this application provided, has the advantage that fire endurance is high, can effectively prevent that the conflagration diffusion from stretching, and has the performance of high strength, can not receive the damage in transportation or earthquake.
In a first aspect, an embodiment of the present application provides a prefabricated modular unit, including a frame and a firewall, where the firewall is connected to a wall panel of the frame constituting the prefabricated modular unit. The frame is usually a container-type structure, and the frame includes bottom layer support body, top layer support body and the stand of connection between bottom layer support body and top layer support body, prevents that hot wall installs to the frame and forms container-type prefabricated modular unit. The firewall comprises a first layer and a second layer which are arranged in a stacked mode, wherein the surface, far away from the second layer, of the first layer is one outer surface of the firewall, the surface, far away from the first layer, of the second layer is the other outer surface of the firewall, the two outer surfaces are opposite to the firewall per se, the surface, far away from the second layer, of the first layer and the surface, far away from the first layer, of the second layer are both surfaces outside the firewall, namely the first layer and the second layer are two outermost layers of the firewall, the surface, far away from the second layer, of the first layer and the surface, far away from the first layer, of the second layer are arranged oppositely, the firewall does not need to be combined with other walls, and the firewall per se has enough strength and can be used as a wall of a prefabricated modular unit to provide protection and sealing effects for the prefabricated modular unit. It is understood that other structural layers may be disposed between the first layer and the second layer to collectively form a firewall. The second layer is positioned on one side of the first layer facing the inner space of the prefabricated module unit, the yield strength of the first layer is greater than or equal to that of the second layer, the fire resistance limit of the second layer is greater than or equal to that of the first layer, the fire resistance limit refers to the period from the time when any building component is subjected to a fire test according to a time-temperature standard curve to the time when the supporting capacity or integrity is lost or the fire-insulating effect is lost, and the fire resistance of the second layer is equal to that of the first layer or better than that of the first layer. The yield strength of the first layer is greater than or equal to that of the second layer, so that the whole firewall is high in strength and not easy to damage in transportation or earthquake.
The frame and the firewall of the application can be pre-integrated in a factory, so that the problem that construction period is long due to field construction is avoided, and the advantage of rapid deployment is achieved. This application is through setting up the structure of preventing hot wall for at least two-layer (first layer and second floor) for prevent hot wall and have good fire behavior and high strength concurrently, the hot wall that prevents of high strength can be used as prefabricated modular unit's wallboard alone, provides the protection and plays sealed effect for the inside functional module of frame, can prevent inside water or other debris get into prefabricated modular unit, influences prefabricated modular unit's normal work and security. The good fireproof performance enables the fireproof wall to play a role in preventing fire from spreading, time is won for rescue, and large-area fire caused by local combustion is prevented. The firewall of the application also has the characteristics of low thickness, light weight and low cost, and can be widely used as a wallboard of a prefabricated module unit.
In a possible embodiment, the frame includes a first end beam, a first upright, a second end beam, and a second upright, which are connected in sequence and form a quadrilateral frame structure, four edges of the firewall are respectively fixed to the first end beam, the first upright, the second end beam, and the second upright, and the firewall fills an inner space defined by the quadrilateral frame structure. The prefabricated modular units are of a container structure, and the firewall can form an external wall panel of the container structure. Illustratively, the frame may be a rectangular parallelepiped frame, and the firewall is mounted to at least one of six outer surfaces of the rectangular parallelepiped frame, and the firewall serves as an exterior wall panel capable of preventing external fire from spreading to the inside of the prefabricated module unit when a fire occurs.
In one possible embodiment, the first layer has a yield strength greater than that of the second layer, which is a fire barrier layer and is used to increase the fire endurance of the fire barrier. In addition to fire protection, fire protection walls also need to have strength properties. The prefabricated module unit is pre-integrated in a factory and then needs to be transported to a field to be stacked and installed to form a data center, the high-strength firewall can prevent the prefabricated module unit from being damaged in the transportation process, the prefabricated module unit can be prevented from being deformed and damaged when an earthquake occurs, and the high-strength firewall has good anti-seismic performance. The first layer that has high yield strength mainly provides intensity and sealing performance for preventing hot wall, and the second floor mainly provides fire behavior for preventing hot wall for this embodiment's prevent hot wall has fire behavior and intensity performance concurrently.
In one possible embodiment, the first layer is a corrugated sheet and the second layer is a rock wool sandwich sheet. The buckled plate can also be the material of other materials for the steel sheet, and the buckled plate has high strength and good leakproofness, can prevent that water from getting into the inside of prefabricated modular unit. Rock wool sandwich panel has good thermal-insulated, fire behavior of keeping warm, and the range upon range of setting up of buckled plate and rock wool sandwich panel prevents that hot wall that forms has good intensity and fire behavior, and the rock wool sandwich panel has good surface properties, and the rock wool sandwich panel is used as preventing hot wall towards inside surface like this, can play the effect of decorating, when field installation, need not carry out extra decoration to preventing hot wall like this, practices thrift manufacturing cost.
In a possible embodiment, the first layer is welded to the frame, the prefabricated modular unit is provided with a connecting piece, the connecting piece comprises a first plate and a second plate which are fixedly connected and arranged at an included angle, specifically, the connecting piece can be an L-shaped structure, the first plate is connected with the second layer, and the second plate is connected with the frame. Corrugated plate and rock wool battenboard all are fixed to the frame as preventing the outermost structure of hot wall, can increase the joint strength who prevents hot wall and frame. It can be understood that the fixing mode of corrugated plate, rock wool battenboard is not limited to the form of welding, connecting piece, also can adopt bolt or other mode fixed connection, and this application does not limit this.
In a possible embodiment, the fire protection wall comprises a polymer foam, the polymer foam being located between the first layer and the second layer, the surface of the first layer comprising alternately connected recesses and protrusions, the polymer foam filling the recesses. When the first layer was the buckled plate, the surface texture of buckled plate was the corrugate, and the buckled plate includes alternate connection's concave part and convex part, and the surface and the convex part contact of other flame retardant coatings are the air between the surface of other flame retardant coatings and the concave part, and the air has reduced firewall's fire prevention ability. Therefore, by filling polymer foam between the corrugated sheet and other fire-retardant layers, air can be prevented from entering the interior of the fire-retardant wall, so that the fire-retardant performance of the fire-retardant wall can be enhanced. The polymer foaming can be polyurethane foaming, and the polymer foaming has good deformability, and filling that can be fine can improve the fire behavior of preventing hot wall at the concave part of buckled plate, and the polymer foaming has good heat-insulating ability, and the polymer foaming still has the characteristics of light, can reduce the quality of preventing hot wall for prefabricated modular unit is convenient for transport and the on-the-spot installation of piling up.
In a possible embodiment, be equipped with gypsum board and rock wool layer between the buckled plate with the rock wool battenboard, the gypsum board be located the rock wool layer with between the rock wool battenboard. In other embodiments, gypsum board may also be located between the corrugated board and the rock wool layer. Gypsum board and rock wool layer have good fire prevention effect, and the stack of multilayer flame retardant coating can effectively increase the fire-proof ability of preventing hot wall.
In one possible embodiment, the firewall is located in the interior space of the prefabricated modular unit and divides the interior space of the prefabricated modular unit into at least two parts. When the fire wall is positioned in the prefabricated module unit, once a fire disaster occurs in the local part of the prefabricated module unit, the fire wall can effectively control the fire behavior within a certain range, and the fire loss is reduced.
In one possible embodiment, the first layer and the second layer are both fire-blocking layers. When the fire wall is positioned in the prefabricated modular unit, the damage to the fire wall is light during transportation or earthquake, so the requirement of the fire wall positioned in the interior on strength is low, and the first layer and the second layer can be fireproof layers with good fireproof performance so as to enhance the fireproof capacity of the fire wall.
In a possible embodiment, the first layer is a first rock wool sandwich panel, the second layer is a second rock wool sandwich panel, a first joint is arranged on the first rock wool sandwich panel, a second joint is arranged on the second rock wool sandwich panel, and the first joint and the second joint are arranged in a staggered manner. The rock wool sandwich board has good fireproof performance and a decorative effect, and when the fireproof wall is positioned in the prefabricated module unit, the rock wool sandwich board can be used as a main fireproof layer. The interior of the rock wool sandwich board is rock wool, and the exterior of the rock wool sandwich board is spliced by one plate-shaped structure, so that the rock wool is packaged in the plate-shaped structure. There is the seam between the adjacent platelike structure, and rock wool battenboard's seam crossing intensity is weak, fire behavior is poor and not waterproof, through setting up two rock wool battenboard, and makes the first seam of first rock wool battenboard and the second seam dislocation set of second rock wool battenboard, can make like this prevent that hot wall holistic intensity and fire behavior strengthen, also can play certain waterproof effect.
In one possible embodiment, the fire protection wall further comprises a gypsum board and a rock wool layer, the gypsum board and the rock wool layer being located between the first rock wool sandwich panel and the second rock wool sandwich panel. In other words, other fireproof layers, such as a gypsum board layer and a rock wool layer, can be arranged between the first rock wool sandwich board and the second rock wool sandwich board, and in addition, other fireproof materials with fireproof performance can also be adopted.
In a possible implementation mode, a third joint is arranged on the gypsum board, the first rock wool sandwich board and the gypsum board are stacked in a first direction, the second direction is perpendicular to the first direction, and the distance between the first joint and the third joint in the second direction is greater than 50 mm. Too close a first seam to a third seam tends to result in fracture of the gypsum board and the first rock wool sandwich panel.
In one possible embodiment, the first layer and the second layer are both inorganic insulating layers. The inorganic heat-insulating layer has good heat-insulating and fireproof effects, avoids the problem of easy aging and has long service life.
In a possible embodiment the thickness of the corrugated sheet in the first direction is 10mm-100mm, which is advantageous for high strength properties of the fire protection wall. The first direction is a stacking direction of the first layer and the second layer. When the thickness of buckled plate on the first direction was less than 10mm, the buckled plate was thin excessively, and the buckled plate can not provide sufficient intensity for preventing hot wall, and the buckled plate is when the thickness on the first direction is greater than 100mm, and the size is too thick, and the quality is big, and has increased material cost.
In one possible embodiment, the thickness of the rock wool sandwich panel in the first direction is 10mm to 200mm, which is advantageous for the excellent fire-proof performance of the fire-proof wall. When the thickness of rock wool battenboard on the first direction was less than 10mm, it was poor to prevent hot wall's fire behavior, and when the thickness of rock wool battenboard on the first direction was greater than 200mm, it was too big to prevent hot wall's thickness, and increased manufacturing cost.
In a possible embodiment, the thickness of the rock wool layer in the first direction is 10mm to 200mm, which is advantageous for a fire protection wall with excellent fire protection properties. When the thickness of rock wool layer on the first direction was less than 10mm, it was poor to prevent hot wall's fire behavior, and when the thickness of rock wool layer on the first direction was greater than 200mm, it was too big to prevent hot wall's thickness, and increased manufacturing cost.
In a second aspect, the present application provides a data center comprising a functional module and the prefabricated modular unit according to any of the foregoing embodiments, wherein the functional module is located inside the prefabricated modular unit. The functional modules comprise an equipment module, a power supply module, a battery module, a corridor module, a stair module, an office module and the like. After the prefabricated module units are configured with the functional modules, the prefabricated module units can be independently transported to a place where a data center needs to be arranged, and then the prefabricated module units are stacked and spliced to form a complete data center.
In a third aspect, the present application provides a data center, including any one of the foregoing embodiments, where the number of the prefabricated modular units is two, and the two prefabricated modular units are a first prefabricated modular unit and a second prefabricated modular unit respectively, the first prefabricated modular unit and the second prefabricated modular unit are spliced together, one of the firewalls of the first modular unit is in butt joint with the second unit and is called a first firewall, one of the firewalls of the second modular unit is in butt joint with the first unit and is called a second firewall, and both the first layer of the first firewall and the first layer of the second firewall are rock wool sandwich panels. When first prefabricated modular unit and the concatenation of the prefabricated modular unit of second set up, in whole data center, first prevent that hot wall and second prevent hot wall for the inside wallboard of data center, and inside wallboard receives the degree of earthquake damage low, consequently can adopt the rock wool battenboard that has good fire behavior but intensity is slightly less than. It will be appreciated that in other embodiments, the second fire wall may not be provided, and only the first fire wall may prevent the spread of fire between the first prefabricated modular unit and the second prefabricated modular unit.
The framework and the firewall of the application can be pre-integrated in a factory, the problem that construction period is long due to field construction is avoided, and the framework and the firewall have the advantage of rapid deployment. The application prevents that hot wall has good fire behavior and high strength characteristic concurrently, can satisfy transportation, antidetonation requirement, can play the effect that prevents the intensity of a fire and spread again, prevents the large tracts of land conflagration that local combustion arouses, reduces the loss. The firewall of the application also has the characteristics of low thickness, light weight and low cost, and can be widely used as a wallboard of a prefabricated module unit.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or the background art of the present invention, the drawings required to be used in the embodiments or the background art of the present invention will be described below.
FIG. 1 is a schematic perspective view of a data center provided in one embodiment of the present application;
FIG. 2 is a block diagram of an arrangement of prefabricated modular units in one of the levels of a data center according to one embodiment of the present application;
FIG. 3 is a schematic diagram of functional modules in a data center provided by one embodiment of the present application;
FIG. 4 is a schematic structural diagram of a data center provided in an embodiment of the present application;
FIG. 5 is a schematic structural diagram of a prefabricated modular unit provided in one embodiment of the present application;
FIG. 6 is a schematic structural diagram of a prefabricated modular unit provided in one embodiment of the present application;
FIG. 7 is a schematic structural view of a firewall provided in accordance with an embodiment of the present application;
FIG. 8 is a schematic structural view of a firewall provided in accordance with another embodiment of the present application;
fig. 8A is a schematic view of a connection structure between a firewall and a frame according to another embodiment of the present application;
FIG. 9 is a schematic structural view of a prefabricated modular unit provided in accordance with an embodiment of the present application;
FIG. 10 is a schematic view of a firewall provided in accordance with an embodiment of the present application;
FIG. 11 is a schematic structural view of a firewall provided in accordance with an embodiment of the present application;
FIG. 12 is a schematic structural view of a firewall provided in accordance with an embodiment of the present application;
FIG. 13 is a schematic diagram of a data center according to an embodiment of the present application;
FIG. 14 is a schematic diagram of a first firewall and a second firewall in a data center according to an embodiment of the present application;
fig. 15 is a schematic structural diagram of a first firewall and a second firewall according to another embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
With the global explosive development of the data center industry and the rapid growth of the social economy, the development and construction of the data center will be in a high-speed period. The data center is an important strategic resource as human resources and natural resources, and in the data center industry in the information age, data can be better understood and applied only by applying data in a large scale and flexibly.
In the high-speed development of data centers, prefabricated modular data centers are increasingly widely used, for example, a prefabricated modular data center can be divided into a plurality of prefabricated modular units according to the dimensions of containers, the structural design of each prefabricated modular unit needs to meet the functions of splicing, laminating and free combination, namely, the plurality of prefabricated modular units can be spliced and laminated into a whole to form the prefabricated modular data center. For each prefabricated modular unit, its own structural assembly and integrated prefabrication of internal equipment is done at the factory, for example, each prefabricated modular unit includes the frame and the wallboard of installation to the frame, and wallboard installation frame constitutes the box that is used for holding the functional module, and the wallboard of this application is the firewall that has the fire prevention effect. The functional modules arranged in the box body can be divided into the following parts according to specific functions: equipment module, power module, battery module, corridor module, stair module, office module etc.. After the functional modules are configured on each box body, the box bodies can be independently transported to the site (a place where a data center needs to be arranged, usually outdoors), and then a complete data center (similar to a building of a multi-storey building) can be formed by stacking and splicing.
Fig. 1 is a perspective view of a data center 100 according to an embodiment, in which the data center 100 is a three-layer structure formed by stacking a plurality of prefabricated module units 10, and each layer includes a plurality of prefabricated module units 10. It should be noted that the data center 100 may also be configured as a two-layer architecture, a four-layer architecture, or a five-layer architecture, which is not limited in this application, and fig. 1 only schematically shows that the data center 100 may be a three-layer architecture.
Fig. 2 shows a scheme of arrangement of the prefabricated module units 10 of one of the layers of the data center 100 provided in the embodiment shown in fig. 1, where an equipment module, a power supply module, a stair module and a corridor module are disposed in the layer, where the number of the equipment modules is relatively large (fig. 2 schematically depicts 12 equipment modules), the equipment modules are disposed side by side and centrally arranged in a middle area, the number of the stair modules is two and distributed on two sides of the equipment module, the number of the power supply modules is four, two power supply modules are respectively arranged on one side of the two stair modules away from the equipment module, and the corridor module is arranged on one side of the other three types of function modules and arranged in a row.
Fig. 3 schematically depicts the basic form of several functional modules, including a power module, a battery module, an equipment module, an MEP (Mechanical and Plumbing) module, a corridor module, and a stair module, wherein the power module and the battery module may be the power supply module in the data center 100 shown in fig. 2. The utility model discloses a data center, including power module, equipment, be equipped with battery, transformer, equipment such as medium voltage equipment and uninterrupted power source in the power module usually, be equipped with rack (the inside server that is equipped with of rack) and refrigeration plant etc. in the equipment module usually, be equipped with power supply cable in the MEP module (Mechanical and plumbbig, machinery, electricity and pipeline) module usually, ventilation equipment, fire control pipeline, water pipe etc. the corridor module is equipped with the pavement, the staff gets into the inside transport that carries out equipment of data center through the pavement, the maintenance operation, the stair module is equipped with the stair, be used for the staff to get into and carry between the framework of 100 different layers of data center, the maintenance operation. Fig. 4 is a schematic structural diagram of a data center 100 provided in an embodiment, in which only the frames 11 of the prefabricated module units 10 are retained, the internal functional modules and wall boards are removed, and a plurality of frames 11 are spliced to form the basic architecture of the data center 100.
Referring to fig. 5, 6 and 7, fig. 5 is a schematic structural diagram of the frame 11, fig. 6 is a schematic structural diagram of the prefabricated module unit 10, and fig. 7 is a schematic structural diagram of the firewall 12. The prefabricated modular unit 10 comprises a frame 11 and a firewall 12. The firewall 12 is connected to the frame 11 to form a wall panel of the prefabricated modular unit 10.
The frame 11 includes a top stage body 101, a bottom stage body 102, and a pillar. The pillars are connected between the top stage body 101 and the bottom stage body 102. The number of the upright columns is four, namely a first upright column 103, a second upright column 104, a third upright column 105 and a fourth upright column 106. The top rack body 101 comprises two first end beams 1011 and two first cross beams 1012, the number of the first end beams 1011 and the number of the first cross beams 1012 are both two, the two first cross beams 1012 are arranged at intervals, and the two first end beams 1011 are connected with the two first cross beams 1012 and are positioned at two ends of the first cross beams 1012; the bottom frame body 102 includes a second end beam 1021 and a second cross beam 1022, the number of the second end beam 1021 and the second cross beam 1022 is two, two second cross beams 1022 are arranged at an interval, and the two second end beams 1021 connect the two second cross beams 1022 and are located at two ends of the second cross beam 1022. It can be understood that the first end beam 1011 and the second end beam 1021 are stacked and spaced apart, the first upright post 103 and the second upright post 104 are connected between the first end beam 1011 and the second end beam 1021, and the first end beam 1011, the first upright post 103, the second end beam 1021 and the second upright post 104 are connected in sequence and form the quadrilateral frame structure 107.
The firewall 12 includes a first layer 121 and a second layer 122 stacked in a first direction a1, and a second direction a2 perpendicular to the first direction a 1. The surface 1211 of first layer 121 facing away from second layer 122 is one outer surface of firewall 12, the surface 1221 of second layer 122 facing away from first layer 121 is the other outer surface of firewall 12, and second layer 122 is located on the side of first layer 121 facing toward the interior space of prefabricated modular unit 10, i.e., first layer 121 and second layer 122 are the outermost two layers of firewall 12, and both surface 1211 of first layer 121 facing away from second layer 122 and surface 1221 of second layer 122 facing away from first layer 121 are exposed, firewall 12 need not be combined with other walls, and firewall 12 itself has sufficient strength to serve as a wall of prefabricated modular unit 10 to provide protection and sealing to prefabricated modular unit 10. It is understood that other structural layers may be disposed between the first layer 121 and the second layer 122 to collectively form the firewall 12.
The yield strength of the first layer 121 is greater than or equal to the yield strength of the second layer 122 and the fire limit of the second layer 122 is greater than or equal to the fire limit of the first layer 121, it also being understood that the fire-retardant properties of the second layer 122 are the same as the fire-retardant properties of the first layer 121 or that the fire-retardant properties of the second layer 122 are better than the fire-retardant properties of the first layer 121. The frame 11 and the firewall 12 can be pre-integrated in a factory, the problem that field construction causes long construction period is solved, the rapid deployment advantage is achieved, field assembly time can be saved, and construction efficiency is improved. Firewall 12 of this application is equipped with first layer 121 and second floor 122 for firewall 12 has good fire behavior and high strength concurrently, and high strength firewall 12 can be used as prefabricated modular unit 10's wallboard alone, and for the inside functional module of frame 11 provides the protection and plays sealed effect, can prevent inside water or other debris entering prefabricated modular unit 10. The good fire resistance enables the firewall 12 to prevent the fire from spreading, strives for time for rescue, prevents large area fires caused by local combustion, and reduces losses. The fire protection wall 12 of the present application also has the characteristics of low thickness, light weight, convenient transportation and on-site stacking, and the cost of the fire protection wall 12 is low, and can be widely used as a wall panel of the prefabricated modular unit 10.
Both the first layer 121 and the second layer 122 of the present application are inorganic insulating layers. The inorganic heat-insulating layer has good heat-insulating and fireproof effects, avoids the problem of easy aging and has long service life.
The fire rated wall 12 of the present application may be used as an exterior wall panel for prefabricated modular unit 10 and may also be used as an interior wall panel for prefabricated modular unit 10.
First, taking the example of the use of fire-protecting wall 12 as the exterior wall panel of prefabricated modular unit 10, with reference to fig. 6 and 7 in combination, fire-protecting wall 12 in fig. 6 is used as the exterior wall panel of prefabricated modular unit 10, and fig. 7 is a schematic structural view of fire-protecting wall 12 in fig. 6 as the exterior wall panel. The prefabricated modular units 10 are of a container construction with the fire protection wall 12 forming an exterior wall panel of the container construction. Illustratively, the frame 11 may be a rectangular parallelepiped frame, and the firewall 12 is mounted to the frame 11 to form at least one of six outer surfaces of the rectangular parallelepiped frame. In the prefabricated modular unit 10 shown in fig. 6, four edges of the fire-proof wall 12 are fixedly connected with the first end beam 1011, the first upright post 103, the second end beam 1021 and the second upright post 104, respectively, the fire-proof wall 12 fills the inner space defined by the quadrilateral frame structure 107, and the fire-proof wall 12 separates the outside from the inner space of the prefabricated modular unit 10. The firewall 12 is used to prevent external fire from spreading to the inside of the prefabricated modular unit 10 when a fire breaks out.
The fire protection wall 12 is required to have strength properties in addition to fire protection properties. The prefabricated module unit 10 needs to be transported to a field for installation after being pre-integrated in a factory, the high-strength firewall 12 can prevent the prefabricated module unit 10 from being damaged in the transportation process, and can prevent the prefabricated module unit 10 from being deformed and damaged when an earthquake occurs, and the high-strength firewall has good anti-seismic performance. Thus, where the fire protection wall 12 is to be used as an exterior wall panel for prefabricated modular units 10, the first layer 121 may be provided as a reinforcing layer, the yield strength of the first layer 121 being greater than the yield strength of the second layer 122, the second layer 122 being a fire barrier layer, the first layer 121 being provided to enhance the strength of the fire protection wall 12, the fire barrier layer being provided to enhance the fire endurance of the fire protection wall 12. That is, the first layer 121 having increased strength primarily provides strength and sealing properties to the firewall 12, and the second layer 122 primarily provides fire protection properties to the firewall 12.
In one embodiment, referring to fig. 6 and 7, the fire protection wall 12 is provided with corrugated sheeting 123, polyurethane foam 124, rock wool layer 125 and rock wool sandwich panels 126.
The rock wool sandwich panel 126 is a second layer and serves as a fire barrier layer of the fire barrier 12 for enhancing the fire barrier performance of the fire barrier 12. The rock wool sandwich panel 126 is formed by splicing rock wool inside and a plate-shaped structure outside, so that the rock wool is packaged inside the plate-shaped structure, and has better surface performance than the rock wool layer 125. The rock wool sandwich panel 126 has good heat preservation, heat insulation and fire resistance, and the rock wool sandwich panel 126 has good surface performance, so that the rock wool sandwich panel 126 can play a role in decoration when being used as the surface of the firewall 12 facing the inside, so that the firewall 12 does not need to be additionally decorated when being installed on site, the time of site construction is saved, and the manufacturing cost is reduced.
The polyurethane foam 124 is a third layer of the firewall 12, the rock wool layer 125 is a fourth layer of the firewall 12, and both the polyurethane foam 124 and the rock wool layer 125 are fireproof layers sandwiched between the corrugated plate 123 and the rock wool sandwich plate 126, so as to enhance the fireproof performance of the firewall 12.
The polyurethane foam 124 is a type of polymer foam, and a foam made of a material other than polyurethane may be used. The surface of the rock wool layer 125 is in contact with the convex 1232, and if there is no polyurethane foam 124, there is air between the surface of the rock wool layer 125 and the concave 1231, which reduces the fire protection capability of the fire protection wall 12, making the fire protection wall 12 poor in heat insulation performance. The polyurethane foam 124 has good deformation capability, the shape of the polyurethane foam can be changed according to the structure to be filled, the polyurethane foam can be well filled in the concave portions 1231 of the corrugated plate 123, the polyurethane foam 124 has good heat insulation capability, and the fireproof performance of the fireproof wall 12 can be improved. Therefore, by filling the polyurethane foam 124 between the corrugated plate 123 and the rock wool sandwich plate 125 to drive the air between the surface of the rock wool layer 125 and the concave part 1231, it is advantageous to prevent the air from entering the inside of the firewall 12, so as to enhance the fire-proof performance of the firewall 12. The polyurethane foam 124 also has the characteristic of being lightweight, which reduces the mass of the fire wall 12, making the prefabricated modular unit 10 easier to transport and install.
The rock wool layer 125 has good heat insulation and fire prevention effects, is very stable in size, cannot deform due to high temperature in a fire disaster, and can also play a role in energy conservation and environmental protection. The rock wool layer 125 is applied by overlapping the corrugated plate 123, the polyurethane foam 124 and the rock wool sandwich plate 126, so that the fire protection capability of the fire protection wall 12 can be effectively increased and the strength of the fire protection wall 12 can be enhanced.
In other embodiments, referring to fig. 8, where the fire wall 12 is used as an exterior wall panel for the prefabricated modular unit 10, a gypsum board 127 may also be provided, the gypsum board 127 being located between the rock wool layer 125 and the rock wool sandwich panel 126, or the gypsum board 127 being located between the corrugated panel 123 and the rock wool layer 125. The gypsum board 127 is a material with light weight, high strength, thin thickness, convenient processing, good performances of sound insulation, heat insulation, fire prevention and the like, and can be used together with the corrugated board 123, the polyurethane foam 124, the rock wool layer 125 and the rock wool sandwich board 126 to effectively increase the fire prevention capability of the firewall 12 and enhance the strength of the firewall 12, so that the firewall 12 has the advantages of light weight, thinness and low cost.
The fire wall 12 in the laminated arrangement is formed by the extrusion combination of the corrugated plate 123, the polyurethane foam 124, the rock wool layer 125, the gypsum board 127 and the rock wool sandwich plate 126, and the polyurethane foam 124 has the adhesive property and can be adhered to the corrugated plate 123 and the rock wool layer 125. Corrugated sheet 123 and rock wool sandwich 126 mechanically compress polyurethane foam 124, rock wool layer 125 and gypsum board 127 to a tight fit to achieve the connection between the layers. It is understood that the various layers of the firewall 12 may be fixedly attached by adhesives or the like.
The corrugated sheet 123 has a thickness in the first direction a1 of 10mm to 100mm, which is advantageous for high strength performance of the firewall 12. When the thickness of buckled plate 123 on first direction A1 is less than 10mm, buckled plate 123 can not provide sufficient intensity for preventing hot wall 12, and when the thickness of buckled plate 123 on first direction A1 was greater than 100mm, the size was too thick, and the quality is big, and has increased material cost.
The thickness of the rock wool sandwich panel 126 in the first direction a1 is 10mm to 200mm, which is advantageous for the excellent fire-proof performance of the fire-proof wall 12. When the thickness of rock wool sandwich panel 126 on first direction A1 is less than 10mm, prevent that fire wall 12's fire behavior is poor, and when the thickness of rock wool sandwich panel 126 on first direction A1 is greater than 200mm, prevent that fire wall 12's thickness is too big, and increased manufacturing cost.
The thickness of the rock wool layer 125 in the first direction a1 is 10mm to 200mm, which is advantageous for the fire protection wall 12 to have excellent fire protection properties. When the thickness of rock wool layer 125 on first direction A1 is less than 10mm, prevent the fire behavior of hot wall 12 poor, when the thickness of rock wool layer 125 on first direction A1 is greater than 200mm, prevent hot wall 12's thickness too big, and increased manufacturing cost.
It should be noted that when the fire protection wall 12 is used as an exterior wall panel of the prefabricated module unit 10, only the corrugated plate 123 and the rock wool sandwich plate 126 may be provided, the corrugated plate 123 mainly provides strength and sealing performance, and the rock wool sandwich plate 126 mainly provides fire protection performance, so as to jointly form the fire protection wall 12 with good strength and fire protection performance.
Referring to fig. 6, 7 and 8A in combination, the firewall 12 is fixed to the frame 11, and four edges of the firewall 12 are fixedly connected to the first end beam 1011, the first upright post 103, the second end beam 1021 and the second upright post 104, specifically, the corrugated plate 123 and the rock wool sandwich plate 126 are fixed to the frame 11, that is, the first layer 121 and the second layer 122 are fixed to the frame 11. The corrugated plate 123 may be welded to the frame 11, and the rock wool sandwich plate 126 may be fixed to the frame 11 by the connection member 15, the connection member 15 being an L-shaped structure. Specifically, the connecting member 15 includes a first plate 151 and a second plate 152 that are fixedly connected and arranged at an included angle, the included angle between the first plate 151 and the second plate 152 may be approximately 90 °, the first plate 151 is attached to the second layer (in this embodiment, the second layer is the rock wool sandwich plate 126) and fixedly connected by a screw 153, and the second plate 152 is attached to the frame 11 and fixedly connected by a screw 153.
The corrugated plate 123 and the rock wool sandwich plate 126, which are outermost structures of the firewall 12, are fixed to the frame 11, so that the connection strength between the firewall 12 and the frame 11 can be increased. It should be understood that the fastening method of the corrugated plate 123 and the rock wool sandwich plate 126 is not limited to the welding and the connecting member, and may also be a bolt or other method, which is not limited in this application. After the four edges of the firewall 12 are fixedly connected with the frame 11, a sealing function can be achieved, and water or other impurities are prevented from entering the interior of the prefabricated modular unit 10.
Taking fire protection wall 12 as an example of an interior wall panel of prefabricated modular unit 10, reference is made to fig. 9 and 10 in combination, where fig. 9 is a schematic view of a structure of prefabricated modular unit 10 and fig. 10 is a schematic view of a structure of fire protection wall 12. The firewall 12 is located in the inner space of the prefabricated modular unit 10 and divides the inner space of the prefabricated modular unit 10 into at least two parts, and particularly, four corners of the firewall 12 are fixed to two first beams 1012 and two second beams 1022, respectively, to divide the prefabricated modular unit 10 into two parts. The fire protection wall 12 is located inside the prefabricated modular unit 10 such that in case of a fire in a part of the prefabricated modular unit 10, the fire protection wall 12 can effectively control the fire to a certain extent, thereby reducing the loss of the fire. For example, in fig. 9, when a fire breaks out in the space on the left side of the firewall 12, the firewall 12 can block the fire in the space on the left side, so as to strive for more time for rescue, prevent the fire from spreading to the space on the right side of the firewall 12, and reduce loss.
Referring to fig. 10, the rock wool sandwich panel has excellent fire-proof performance and decoration, and when the fire-proof wall 12 is located inside the prefabricated module unit 10, the rock wool sandwich panel may be used as a main fire-proof layer. Specifically, the firewall 12 is provided with a first rock wool sandwich panel 1261, a first gypsum board 1271, a rock wool layer 125, a second gypsum board 1272, and a second rock wool sandwich panel 1262, which are stacked in this order. First rock wool sandwich panel 1261 is the first layer, and second rock wool sandwich panel 1262 is the second layer, and first layer 121 and second layer 122 are the flame retardant coating. In this embodiment, the firewall 12 is used as an interior wall panel of the prefabricated modular unit 10, and is less likely to be damaged and damaged during transportation and earthquakes than an exterior wall panel, and thus, the strength of the firewall 12 can be set to be low. The strength of first rock wool sandwich panel 1261 and second rock wool sandwich panel 1262 is less than buckled plate 123, but has good thermal-insulated, fire behavior, can also set up other fire prevention layers between first rock wool sandwich panel 1261 and the second rock wool sandwich panel 1262, for example, gypsum board, rock wool layer etc.. In the present embodiment, the first rock wool sandwich panel 1261, the first gypsum board 1271, the rock wool layer 125, the second gypsum board 1272, and the second rock wool sandwich panel 1262 are stacked in this order, and the resulting fire wall 12 has excellent fire resistance.
In another embodiment, the first rock wool sandwich panel 1261, the rock wool layer 125 and the second rock wool sandwich panel 1262 may be stacked in this order to form the firewall 12 without providing the first gypsum board 1271 and the second gypsum board 1272 between the first rock wool layer 1261 and the second rock wool layer 1262; alternatively, the firewall 12 is provided with only the first rock wool sandwich panel 1261 and the second rock wool sandwich panel 1262, and is not provided with the first gypsum board 1271, the second gypsum board 1272, and the rock wool layer 125.
As shown in fig. 11, fig. 11 is a schematic structural diagram of a firewall 12. The firewall 12 is provided with only the first rock wool sandwich panel 1261 and the second rock wool sandwich panel 1262, and the first rock wool sandwich panel 1261 and the second sandwich panel 1262 are stacked in the first direction a 1. The rock wool sandwich panels (the first rock wool sandwich panel 1261 and the second rock wool sandwich panel 1262) are formed by splicing a plate-shaped structure with rock wool at the inner part and a plate-shaped structure with a piece at the outer part, so that the rock wool is packaged in the plate-shaped structure. Seams are arranged between adjacent plate-shaped structures, a first seam 1263 is arranged on the first rock wool sandwich plate 1261, a second seam 1264 is arranged on the second rock wool sandwich plate 1262, and the seams of the rock wool sandwich plates are weak in strength, poor in fireproof performance and not waterproof. In this embodiment, by arranging the first seam 1263 of the first rock wool sandwich panel 1261 and the second seam 1264 of the second rock wool sandwich panel 1262 in a staggered manner, it can be understood that the second seam 1264 is located between two adjacent first seams 1263 in the second direction a2, or that the first seam 1263 and the second seam 1264 are not collinear in the first direction a1, so that the overall strength and fire resistance of the firewall 12 can be enhanced, and the first seam 1263 and the second seam 1264 can be prevented from being damaged. Specifically, the distance L1 between the first seam 1263 and the second seam 1264 in the second direction a2 is greater than 50mm, so that the fire protection wall 12 provided with the first rock wool sandwich panel 1261 and the second rock wool sandwich panel 1262 has good strength, and the first seam 1263 and the second seam 1264 are not easy to be damaged and have good fire protection performance.
As shown in fig. 12, fig. 12 is a schematic structural diagram of another firewall 12. The fire protection wall 12 comprises a first rock wool sandwich panel 1261, a gypsum board 127 and a second rock wool sandwich panel 1262 which are arranged one above the other in the first direction a1, wherein a third joint 1273 is arranged on the gypsum board 127, and the distance L2 between the first joint 1263 and the third joint 1273 in the second direction a2 is larger than 50mm, otherwise, the first joint 1263 and the third joint 1273 are too close to cause the gypsum board 127 and the first rock wool sandwich panel 1261 to break, and the fire protection performance at the joints is poor.
It should be noted that the fire protection wall 12 with high strength and good fire protection performance, in which the first layer is the corrugated plate 123 and the second layer is the rock wool sandwich plate 126, can also be used as an internal wall plate of the prefabricated modular unit 10, and is located inside the prefabricated modular unit 10; when the requirement for the external wall panel is not high, the firewall 12 having lower strength and excellent fire-proof performance, in which the first layer is the first rock wool sandwich panel 1261 and the second layer is the second rock wool sandwich panel 1262, may also be used as the external wall panel of the prefabricated modular unit 10, which is not limited in this application.
As shown in fig. 13 and 14, fig. 13 is a schematic structural diagram of the data center 100, and fig. 14 is a schematic structural diagram of the first firewall 12-1 and the second firewall 12-2 in the data center. Data center 100 includes a first prefabricated modular unit 10-1 and a second modular unit 10-2, the first prefabricated modular unit 10-1 and the second modular unit 10-2 are spliced, one of the firewalls of the first prefabricated modular unit 10-1 is interfaced with the second prefabricated modular unit 10-2 and is referred to as a first firewall 12-1, and one of the firewalls of the second prefabricated modular unit 10-2 is interfaced with the first prefabricated modular unit 10-1 and is referred to as a second firewall 12-2. The first layer 121 of the first firewall 12-1 and the first layer 121 of the second firewall 12-2 may both be the second rock wool sandwich panel 1262, and specifically, the first firewall 12-1 and the second firewall 12-2 each include a first rock wool sandwich panel 1261, a rock wool layer 125, and a second rock wool sandwich panel 1262.
When the first prefabricated modular unit 10-1 and the second prefabricated modular unit 10-2 are spliced, in the whole data center, the first firewall 12-1 and the second firewall 12-2 are wall boards inside the data center 100, and the internal wall boards are damaged by earthquake to a low degree, so that rock wool sandwich boards with good fireproof performance but slightly weaker strength can be adopted. It can also be understood that the first firewall 12-1 is an exterior wall panel of the first prefabricated modular unit 10-1 and the second firewall 12-2 is an exterior wall panel of the second prefabricated modular unit 10-2, but after the first prefabricated modular unit 10-1 and the second prefabricated modular unit 10-2 are spliced, the first firewall 12-1 and the second firewall 12-2 are both interior wall panels of the data center 100, so that the first firewall 12-1 and the second firewall 12-2 are not easily damaged even though they have lower strength, and therefore, the first layer and the second layer of the first firewall 12-1 and the second firewall 12-2 can both be rock wool sandwich panels with good fire resistance.
When the first prefabricated modular unit 10-1 and the second prefabricated modular unit 10-2 are spliced, the corners are fixedly connected, and the fixing structures at the corners protrude out of the cross beams of the prefabricated modular units, so that a gap 13 is formed between the first firewall 12-1 and the second firewall 12-2. In other embodiments, there may be no gap 13, and the first firewall 12-1 and the second firewall 12-2 are in close contact.
It is understood that in other embodiments, the second firewall 12-2 may not be present and only the first firewall 12-1 may prevent the spread of a fire between the first prefabricated modular unit 10-1 and the second prefabricated modular unit 10-2.
As shown in fig. 15, fig. 15 is a schematic structural diagram of another first firewall 12-1 and second firewall 12-2. In fig. 14, the first firewall 12-1 and the second firewall 12-2 have the same structure, and in other embodiments, referring to fig. 15, the first firewall 12-1 and the second firewall 12-2 have different structures, specifically, the first firewall 12-1 includes a first rock wool sandwich panel 1261, a rock wool layer 125, and a second rock wool sandwich panel 1262, the second firewall 12-2 includes a corrugated plate 123, a polyurethane foam 124, a rock wool layer 125, and a rock wool sandwich panel 126, and the first firewall 12-1 and the second firewall 12-2 may have other combined structures, which is not limited in this application.
The frame 11 and the firewall 12 can be pre-integrated in a factory, the problem that construction period is long due to field construction is solved, and the rapid deployment method has the advantage of rapid deployment. Firewall 12 of this application has good fire behavior and high strength characteristic concurrently, and firewall 12 of this application still has thickness low, light in weight, characteristic with low costs, can extensively be used as prefabricated modular unit's wallboard.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (14)
1. A prefabricated modular unit comprising a frame and a fire rated wall, said fire rated wall being connected to a wall panel of which the frame forms said prefabricated modular unit, said fire rated wall comprising a first layer and a second layer arranged one above the other, the surface of said first layer remote from said second layer being one external surface of said fire rated wall, the surface of said second layer remote from said first layer being the other external surface of said fire rated wall, said second layer being located on the side of said first layer facing the interior space of said prefabricated modular unit, the yield strength of said first layer being greater than or equal to the yield strength of said second layer, and the fire rating of said second layer being greater than or equal to the fire rating of said first layer.
2. The prefabricated modular unit of claim 1, wherein the frame includes a first end beam, a first upright, a second end beam, and a second upright coupled in series and forming a quadrilateral frame structure, four edges of the firewall being secured to the first end beam, the first upright, the second end beam, and the second upright, respectively, the firewall filling an interior space defined by the quadrilateral frame structure.
3. The prefabricated modular unit of claim 2, wherein said first layer has a yield strength greater than a yield strength of said second layer, said second layer being a fire barrier layer and being configured to enhance a fire endurance of said fire barrier.
4. The prefabricated modular unit of claim 3, wherein the first layer is corrugated and the second layer is a rock wool sandwich panel.
5. The prefabricated modular unit of claim 4, wherein the first layer is welded to the frame, the prefabricated modular unit having a connector comprising a first plate and a second plate fixedly connected and angularly disposed, the first plate being connected to the second layer and the second plate being connected to the frame.
6. The prefabricated modular unit of claim 4 or 5, wherein said fire barrier comprises a polymer foam, said polymer foam being located between said first layer and said second layer, a surface of said first layer comprising alternating recesses and protrusions, said polymer foam filling said recesses.
7. A prefabricated modular unit according to any of claims 4 to 6 wherein a layer of rock wool and a layer of gypsum board are provided between the corrugated sheet and the rock wool sandwich panel, the gypsum board being located between the rock wool layer and the rock wool sandwich panel.
8. The prefabricated modular unit of claim 1, wherein the fire wall is positioned in the interior space of the prefabricated modular unit and divides the interior space of the prefabricated modular unit into at least two portions.
9. The prefabricated modular unit of claim 8, wherein the first layer and the second layer are both fire resistant layers.
10. The precast modular unit of claim 9, wherein the first layer is a first rock wool sandwich panel and the second layer is a second rock wool sandwich panel, the first rock wool sandwich panel having a first seam and the second rock wool sandwich panel having a second seam, the first seam being offset from the second seam.
11. The precast modular unit of claim 10, wherein the fire wall further comprises a gypsum board and a rock wool layer, the gypsum board and the rock wool layer being located between the first rock wool sandwich panel and the second rock wool sandwich panel.
12. The precast modular unit of claim 11, wherein a third joint is provided on the gypsum board, the first rock wool sandwich panel and the gypsum board are stacked in a first direction, the second direction is perpendicular to the first direction, and the first joint is spaced from the third joint by a distance greater than 50mm in the second direction.
13. A data center comprising a functional module and a prefabricated modular unit according to any of claims 1-12, said functional module being located inside said prefabricated modular unit.
14. A data center comprising two prefabricated modular units according to any one of claims 1-2 and 8-12, wherein the number of the prefabricated modular units is a first prefabricated modular unit and a second prefabricated modular unit, the first prefabricated modular unit and the second prefabricated modular unit are spliced together, one of the firewalls of the first modular unit is butted with the second unit and is called a first firewall, one of the firewalls of the second modular unit is butted with the first unit and is called a second firewall, and the first layer of the first firewall and the first layer of the second firewall are rock wool sandwich panels.
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