Nuclear safety class compact packaged split air conditioner

Abstract

This invention discloses a nuclear safety-grade compact unit-type split air conditioner, comprising an indoor unit and an outdoor unit connected to each other. The indoor unit is equipped with a first evaporator and a second evaporator, employing a dual-intake structure, meaning both the front and rear sides of the indoor unit are effective air intake surfaces. Air can be drawn in from the front and rear sides and flow through the first and second evaporators for heat exchange. Without significantly increasing the overall height of the evaporators, the heat exchange efficiency per unit volume is significantly improved, meeting the requirements of compactness and high energy efficiency for the indoor unit. The outdoor unit is equipped with microporous protective grilles on the air intake sides of the first and second condensers and on the exhaust side of the top of the condenser fan. These grilles effectively prevent shock waves and projectiles from entering the second unit casing, effectively protecting the first and second condensers and the condenser fan, significantly improving the operational stability and lifespan of the outdoor unit, and enhancing its safety and reliability under extreme conditions such as typhoons or tornadoes.

Description

Technical Field

[0001] This invention relates to the field of nuclear power technology, and in particular to a nuclear safety grade compact unit-type split air conditioner. Background Technology

[0002] Currently, many special and important process rooms in nuclear power plants (such as the electrical room of the emergency diesel generator room) require air conditioning for cooling. The interior space of the room is relatively tight, requiring compact indoor units. Conventional commercial industrial air conditioners cannot effectively meet the compact requirements.

[0003] Furthermore, the outdoor units of conventional commercial industrial air conditioners are typically used in normal environments. Considering their economic efficiency, they feature a lightweight design with a plastic frame and casing, and a small amount of thin steel plates, with a maximum design life of 10 years. When faced with accident loads such as earthquakes, typhoons, tornadoes, and wind-blown debris, the outdoor unit's outer casing is prone to deformation and cracking. Debris may even directly impact critical components such as internal heat exchanger fins and fan blades, leading to equipment damage or even performance failure, rendering it unable to perform safety functions. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a nuclear safety grade compact unit-type split air conditioner.

[0005] The technical solution adopted by the present invention to solve its technical problem is: to construct a nuclear safety grade compact unit-type split air conditioner, including an indoor unit and an outdoor unit connected to each other; The indoor unit includes a first chassis, which includes a first frame. The first frame has a square columnar structure. The first chassis also includes a first side plate, a second side plate, a third side plate, a fourth side plate, and a top plate disposed on the first frame. The first side plate and the second side plate are opposite to each other, and the third side plate and the fourth side plate are opposite to each other. The first chassis has a first installation space and a second installation space, with the first installation space located below the second installation space. The indoor unit includes a first evaporator and a second evaporator disposed within the first installation space and disposed opposite to each other. The first evaporator is opposite to the first side plate, and the second evaporator is opposite to the second side plate. The second installation space is provided with a blower, and the portion of the first side plate opposite to the air outlet side of the blower is provided with air outlet louvers. The outdoor unit includes a second chassis, which includes a second frame. The second chassis also includes a first panel, a second panel, a first microporous protective grille, and a second microporous protective grille disposed on the second frame. The first panel and the second panel are disposed opposite to each other, and the first microporous protective grille and the second microporous protective grille are disposed opposite to each other. The second chassis is provided with a first condenser and a second condenser disposed opposite to each other. The first condenser is disposed opposite to the first microporous protective grille, and the second condenser is disposed opposite to the second microporous protective grille. A condensing fan is disposed on the top cover of the second chassis, and a third microporous protective grille is disposed on the top of the outer casing of the condensing fan.

[0006] In some embodiments, the first frame is made of stainless steel or carbon steel, and the first side plate, the second side plate, the third side plate, the fourth side plate and the top plate are made of carbon steel.

[0007] In some embodiments, the second frame is made of stainless steel or carbon steel; the first panel, the second panel, the first microporous protective grid, and the second microporous protective grid are made of carbon steel.

[0008] In some embodiments, the first frame is provided with a partition, which is parallel and spaced apart from the top plate. The partition defines a first installation space and a second installation space in the inner cavity of the first chassis. The blower is installed on the partition, and the partition is also provided with air holes that penetrate its upper and lower surfaces.

[0009] In some embodiments, the blower includes a mounting frame, a motor, and a volute-less centrifugal blower; The mounting bracket is installed on the partition plate, the volute-less centrifugal fan is located in the inner cavity of the mounting bracket, and the motor is installed on the mounting bracket and connected to the volute-less centrifugal fan.

[0010] In some embodiments, a heater is further provided in the first installation space, the heater being located above the first evaporator and the second evaporator.

[0011] In some embodiments, the indoor unit further includes a sound-absorbing component installed in the second installation space and disposed opposite to the air supply fan. The sound-absorbing component includes a first sound-absorbing perforated plate, a second sound-absorbing perforated plate, a third sound-absorbing perforated plate and a fourth sound-absorbing perforated plate. The first sound-absorbing perforated plate is disposed opposite to the air outlet louver, the second sound-absorbing perforated plate is disposed opposite to the third sound-absorbing perforated plate, and the fourth sound-absorbing perforated plate is disposed opposite to the top plate.

[0012] In some embodiments, the outdoor unit further includes a first metal filter and a second metal filter, wherein the first metal filter is disposed inside the first microporous protective grille and the second metal filter is disposed inside the second microporous protective grille.

[0013] In some embodiments, the through-hole size of the first microporous protective grid and the second microporous protective grid is 20mm×20mm; The first metal filter and the second metal filter have a mesh size of 20.

[0014] In some embodiments, both the first evaporator and the second evaporator are integral copper heat exchangers composed of copper tubes and copper fins.

[0015] Implementing this invention has the following beneficial effects: the nuclear safety grade compact unit-type split air conditioner includes an indoor unit and an outdoor unit that are connected to each other.

[0016] The indoor unit includes a first casing, which includes a first frame. The first frame has a square columnar structure. The first casing also includes a first side plate, a second side plate, a third side plate, a fourth side plate, and a top plate disposed on the first frame. The first side plate and the second side plate are disposed opposite each other, and the third side plate and the fourth side plate are disposed opposite each other. The first casing has a first installation space and a second installation space, with the first installation space located below the second installation space. The indoor unit includes a first evaporator and a second evaporator disposed within the first installation space and disposed opposite each other. The first evaporator is disposed opposite to the first side plate, and the second evaporator is disposed opposite to the second side plate. The second installation space is provided with a blower, and the portion of the first side plate opposite to the blower's outlet side is provided with outlet louvers. The indoor unit is provided with a first evaporator and a second evaporator, which adopt a two-sided air intake structure, meaning that both the front and rear sides of the indoor unit are effective air intake surfaces, allowing air to be drawn in from the front and rear sides and flow through the first and second evaporators for heat exchange. Without significantly increasing the overall height of the evaporator, the heat exchange efficiency per unit volume is significantly improved, meeting the requirements of compactness and high energy efficiency of the indoor unit.

[0017] The outdoor unit includes a second enclosure, which includes a second frame. The second enclosure further includes a first panel, a second panel, a first microporous protective grille, and a second microporous protective grille mounted on the second frame. The first panel and the second panel are positioned opposite each other, as are the first and second microporous protective grilles. Inside the second enclosure are a first condenser and a second condenser, both positioned opposite each other. A condensing fan is mounted on the top cover of the second enclosure, and a third microporous protective grille is mounted on the top of the condensing fan's casing. The outdoor unit has microporous protective grilles on the air inlet sides of the first and second condensers and on the top exhaust side of the condensing fan. This effectively prevents shock waves and projectiles from entering the second enclosure, protecting the first and second condensers and the condensing fan, thus improving the outdoor unit's operational stability and lifespan, as well as its safety and reliability under extreme conditions such as typhoons or tornadoes. Attached Figure Description

[0018] To more clearly illustrate the technical solution of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only show some embodiments of the present invention and should not be considered as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort. In the drawings: Figure 1 This is one of the structural schematic diagrams of the indoor unit of a nuclear safety grade compact unit-type split air conditioner in some embodiments of the present invention; Figure 2 This is the second schematic diagram of the indoor unit of the nuclear safety grade compact unit-type split air conditioner in some embodiments of the present invention; Figure 3 This is the third of the structural schematic diagrams of the indoor unit of the nuclear safety grade compact unit-type split air conditioner in some embodiments of the present invention; Figure 4 This is one of the partial structural schematic diagrams of the indoor unit of a nuclear safety grade compact unit-type split air conditioner in some embodiments of the present invention; Figure 5 This is a second schematic diagram of the indoor unit of a nuclear safety grade compact unit-type split air conditioner in some embodiments of the present invention; Figure 6 This is a partial exploded view of the indoor unit of a nuclear safety grade compact modular split air conditioner according to some embodiments of the present invention; Figure 7 This is one of the parameter diagrams of the air outlet louvers of the indoor unit of a nuclear safety grade compact unit-type split air conditioner in some embodiments of the present invention; Figure 8This is the second schematic diagram of the parameters of the air outlet louvers of the indoor unit of the nuclear safety grade compact unit split air conditioner in some embodiments of the present invention; Figure 9 This is the third schematic diagram of the parameters of the air outlet louvers of the indoor unit of the nuclear safety grade compact unit split air conditioner in some embodiments of the present invention; Figure 10 This is one of the structural schematic diagrams of the outdoor unit of the nuclear safety grade compact unit-type split air conditioner in some embodiments of the present invention; Figure 11 This is the second schematic diagram of the outdoor unit of the nuclear safety grade compact unit-type split air conditioner in some embodiments of the present invention; Figure 12 This is the third schematic diagram of the outdoor unit of the nuclear safety grade compact unit-type split air conditioner in some embodiments of the present invention; Figure 13 This is the fourth of the structural schematic diagrams of the outdoor unit of the nuclear safety grade compact unit-type split air conditioner in some embodiments of the present invention; Figure 14 This is one of the partial structural schematic diagrams of the outdoor unit of a nuclear safety grade compact unit-type split air conditioner in some embodiments of the present invention; Figure 15 This is a second schematic diagram of the outdoor unit of a nuclear safety grade compact unit-type split air conditioner in some embodiments of the present invention; Figure 16 This is an exploded view of the outdoor unit of a nuclear safety grade compact modular split air conditioner according to some embodiments of the present invention; Figure 17 This is a partial structural schematic diagram of the outdoor unit of a nuclear safety grade compact unit-type split air conditioner in some embodiments of the present invention; Figure 18 This is a schematic diagram illustrating the working principle of a nuclear safety-grade compact unit-type split air conditioner in some embodiments of the present invention. Detailed Implementation

[0019] To provide a clearer understanding of the technical features, objectives, and effects of this invention, specific embodiments are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientations or positional relationships indicated by terms such as "front," "rear," "upper," "lower," "left," "right," "longitudinal," "horizontal," "vertical," "horizontal," "top," "bottom," "inner," "outer," "head," and "tail" are based on the orientations or positional relationships shown in the accompanying drawings, and are constructed and operated in a specific orientation. They are only for the convenience of describing this technical solution and do not indicate that the device or element referred to must have a specific orientation; therefore, they should not be construed as limitations on this invention.

[0020] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "linking," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. When an component is referred to as being "on" or "below" another component, the component can be located "directly" or "indirectly" on the other component, or there may be one or more intermediary components. The terms "first," "second," "third," etc., are only for the convenience of describing this technical solution and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," "third," etc., may explicitly or implicitly include one or more of that feature. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0021] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of the invention. However, those skilled in the art will understand that the invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of the invention with unnecessary detail.

[0022] Currently, many special and important process rooms in nuclear power plants (such as the electrical room of the emergency diesel generator room) require air conditioning for cooling. The interior space of the room is relatively tight, requiring compact indoor units. Conventional commercial industrial air conditioners cannot effectively meet the compact requirements.

[0023] Furthermore, conventional commercial-grade industrial air conditioners are typically used in normal environments. Considering their economic efficiency, they feature a lightweight design with a plastic frame and outer casing, and a small amount of thin steel plates. The heat exchanger fins are usually coated aluminum fins, with a maximum design life of 10 years. The plastic casing of the indoor unit is prone to aging and cracking in a short period of time. Under seismic loads, the thin frame is easily deformed or even collapsed, resulting in loss of functionality. When the outdoor unit faces accident loads such as earthquakes, typhoons, tornadoes, and wind-blown debris, the outer casing is prone to deformation and cracking. Debris may even directly impact critical components such as the internal heat exchanger fins and fan blades, causing equipment damage or even performance failure, rendering it unable to perform safety functions.

[0024] To address the shortcomings of existing technologies, this application discloses a nuclear safety-grade compact unit-type split air conditioner, which belongs to the field of air conditioning technology for special environments. It can meet the requirements of compact structure, long service life, high energy efficiency, high corrosion resistance, and maintaining structural integrity and functionality under accident environments (including but not limited to earthquakes, tornadoes, and explosion shock waves) in special application scenarios of nuclear power plants.

[0025] See Figures 1 to 18 The present invention discloses a nuclear safety grade compact unit-type split air conditioner, including an indoor unit 10 and an outdoor unit 20 connected to each other.

[0026] like Figures 1 to 6 As shown, the indoor unit 10 includes a first casing 11, which may be generally square columnar in shape, such as a rectangular columnar in shape. The first casing 11 may include a first frame 111, which is square columnar in shape, such as a rectangular columnar in shape.

[0027] The first chassis 11 also includes a first side plate 112, a second side plate 113, a third side plate 114, a fourth side plate 115 and a top plate 116 disposed on the first frame 111. The first side plate 112, the second side plate 113, the third side plate 114 and the fourth side plate 115 can be rectangular plates, and the top plate 116 can be a square plate. The first side panel 112 is disposed opposite to the second side panel 113, and the third side panel 114 is disposed opposite to the fourth side panel 115; the first housing 11 has a first installation space and a second installation space, the first installation space being located below the second installation space; the indoor unit 10 includes a first evaporator 12 and a second evaporator 13 disposed in the first installation space and disposed opposite to each other, the first evaporator 12 being disposed opposite to the first side panel 112, and the second evaporator 13 being disposed opposite to the second side panel 113; the second installation space is provided with a blower 14, and the portion of the first side panel 112 opposite to the air outlet side of the blower 14 is provided with an air outlet louver 117.

[0028] In this application, the indoor unit 10 is equipped with a first evaporator 12 and a second evaporator 13, which adopts a dual-side air intake structure. That is, both the front and rear sides of the indoor unit 10 are effective air intake surfaces, allowing air to be drawn in from the front and rear sides and flow through the first evaporator 12 and the second evaporator 13 for heat exchange. Without significantly increasing the overall height of the evaporators, the heat exchange efficiency per unit volume is significantly improved, meeting the requirements of compactness and high energy efficiency of the indoor unit 10.

[0029] like Figures 10 to 17As shown, the outdoor unit 20 includes a second casing 21, which may be generally square columnar in shape, such as a square columnar or rectangular columnar structure. The second casing 21 includes a second frame 211, and further includes a first panel 212, a second panel 213, a first microporous protective grille 214, and a second microporous protective grille 215 disposed on the second frame 211. The first panel 212 and the second panel 213 are disposed opposite to each other, and the first microporous protective grille 214 and the second microporous protective grille 215 are disposed opposite to each other. The second casing 21 contains a first condenser 22 and a second condenser 23 disposed opposite to each other. The first condenser 22 is disposed opposite to the first microporous protective grille 214, and the second condenser 23 is disposed opposite to the second microporous protective grille 215. A condensing fan 24 is disposed on the top cover of the second casing 21, and a third microporous protective grille 25 is disposed on the top of the outer casing of the condensing fan 24. The outdoor unit 20 of the present invention is provided with microporous protective grilles on the air inlet side of the first condenser 22 and the second condenser 23 and on the top exhaust side of the condenser fan 24. These grilles can effectively prevent shock waves and projectiles from entering the interior of the second casing 21, effectively protect the first condenser 22, the second condenser 23 and the condenser fan 24, effectively improve the operational stability and lifespan of the outdoor unit 20, as well as its safety and reliability under extreme conditions such as typhoons or tornadoes.

[0030] The following is a detailed introduction to the indoor unit 10.

[0031] like Figures 1 to 6 As shown, the indoor unit 10 includes a first casing 11, which may be generally square columnar in shape, such as a rectangular columnar in shape. The first casing 11 may include a first frame 111, which is square columnar in shape, such as a rectangular columnar in shape.

[0032] like Figure 16 As shown, the first chassis 11 also includes a first side plate 112, a second side plate 113, a third side plate 114, a fourth side plate 115 and a top plate 116 disposed on the first frame 111. The first side plate 112, the second side plate 113, the third side plate 114 and the fourth side plate 115 can be rectangular plates, and the top plate 116 can be a square plate. The first side panel 112 is disposed opposite to the second side panel 113, and the third side panel 114 is disposed opposite to the fourth side panel 115; the first housing 11 has a first installation space and a second installation space, the first installation space being located below the second installation space; the indoor unit 10 includes a first evaporator 12 and a second evaporator 13 disposed in the first installation space and disposed opposite to each other, the first evaporator 12 being disposed opposite to the first side panel 112, and the second evaporator 13 being disposed opposite to the second side panel 113; the second installation space is provided with a blower 14, and the portion of the first side panel 112 opposite to the air outlet side of the blower 14 is provided with an air outlet louver 117.

[0033] In some embodiments, the first frame 111 is made of stainless steel or carbon steel, and the first side plate 112, the second side plate 113, the third side plate 114, the fourth side plate 115 and the top plate 116 are made of carbon steel. For example, the first frame 111 is made of stainless steel or carbon steel, and the first side plate 112, the second side plate 113, the third side plate 114, the fourth side plate 115 and the top plate 116 are made of carbon steel plates such as Q235B plates. Stainless steel includes, but is not limited to, stainless steel 316L, and carbon steel includes, but is not limited to, Q235B plates.

[0034] Specifically, the first frame 111 is made of stainless steel or carbon steel. It can be composed of multiple horizontal beams and multiple vertical beams connected together, and can be manufactured using an integral welding process, forming a monolithic frame structure and eliminating weak points in the connections. The first side plate 112, the second side plate 113, the third side plate 114, the fourth side plate 115, and the top plate 116 are made of carbon steel and are bolted to the monolithic first frame 111, together forming a complete rigid enclosure (i.e., the first housing 11). This design ensures that the indoor unit 10 can effectively maintain structural integrity and stability when subjected to accidental loads, guaranteeing safety under extreme operating conditions.

[0035] Furthermore, the upper part of the first side panel 112 may be provided with a ventilation cavity, and the air outlet louver 117 may be installed on the inner or outer side of the first side panel 112 and disposed opposite to the ventilation cavity. The overall size of the air outlet louver 117 may be 400mm. 530mm The 30mm louver, made of 316L stainless steel, significantly reduces airflow noise by increasing the vent size and lowering the airflow velocity. The vent dimensions of the 117 louver can be found in [reference needed]. Figures 7 to 9 .

[0036] like Figure 16 As shown, in some embodiments, the first frame 111 is provided with a partition 118. The partition 118 may be welded to the first frame 111 or connected and fixed by fasteners, including but not limited to fastening bolts or fastening screws. Further, the partition 118 is arranged parallel to and spaced apart from the top plate 116. The partition 118 defines a first installation space and a second installation space in the inner cavity of the first housing 11. The blower 14 is installed on the partition 118. The partition 118 is also provided with air holes 1181 penetrating its upper and lower surfaces. The air holes 1181 may be circular holes and are located in the center of the partition 118.

[0037] like Figure 4 and Figure 5 As shown, in some embodiments, the blower 14 includes a mounting bracket 141, a motor 142, and a volute-less centrifugal fan 143. The mounting bracket 141 is mounted on the partition 118 and can be fastened to the partition 118 using fasteners, including but not limited to fastening bolts or screws. The volute-less centrifugal fan 143 is located inside the mounting bracket 141, and the motor 142 is mounted on the mounting bracket 141 and connected to the volute-less centrifugal fan 143. The motor 142 and the volute-less centrifugal fan 143 are directly connected and coaxially connected. This direct connection reduces transmission losses and improves the efficiency of the motor 142. The volute-less design not only saves axial and radial installation space but also increases the utilization rate of the air duct, enabling the unit to deliver a larger air volume with less input power, significantly improving the overall energy efficiency ratio and achieving efficient heat exchange air delivery under limited internal space.

[0038] In this application, the indoor unit 10 is equipped with a first evaporator 12 and a second evaporator 13, which adopts a dual-side air intake structure. That is, both the front and rear sides of the indoor unit 10 are effective air intake surfaces, allowing air to be drawn in from the front and rear sides and flow through the first evaporator 12 and the second evaporator 13 for heat exchange. Without significantly increasing the overall height of the evaporators, the heat exchange efficiency per unit volume is significantly improved, meeting the requirements of compactness and high energy efficiency of the indoor unit 10.

[0039] like Figure 4 and Figure 5 As shown, in some embodiments, a heater 15 is also provided within the first installation space. The heater 15 is located above the first evaporator 12 and the second evaporator 13. The heater 15 can be connected and fixed to the bottom of the partition 118, either through a connecting bracket or through fasteners, including but not limited to fastening bolts or fastening screws. The heater 15 can be used to heat the air in low-temperature weather (such as winter). The heater 15 can be an electric heater.

[0040] like Figure 6As shown, in some embodiments, the indoor unit 10 further includes a sound-absorbing assembly 16 installed in the second installation space and disposed opposite to the blower 14. The sound-absorbing assembly 16 includes a first sound-absorbing perforated plate 161, a second sound-absorbing perforated plate 162, a third sound-absorbing perforated plate 163, and a fourth sound-absorbing perforated plate 164. The first sound-absorbing perforated plate 161 is disposed opposite to the air outlet louver 117, the second sound-absorbing perforated plate 162 is disposed opposite to the third sound-absorbing perforated plate 163, and the fourth sound-absorbing perforated plate 164 is disposed opposite to the top plate 116. The first sound-absorbing perforated plate 161 may be installed on the inner side of the second side plate 113, the second sound-absorbing perforated plate 162 may be installed on the inner side of the third side plate 114, the third sound-absorbing perforated plate 163 may be installed on the inner side of the fourth side plate 115, and the fourth sound-absorbing perforated plate 164 may be installed on the inner side of the top plate 116. It may be fixed by a threaded connection or a snap-fit ​​connection, which is not specifically limited here.

[0041] In this application, to effectively suppress noise generated by air and mechanical vibration, a first sound-absorbing perforated plate 161, a second sound-absorbing perforated plate 162, a third sound-absorbing perforated plate 163, and a fourth sound-absorbing perforated plate 164 are provided around the fan cavity. The first sound-absorbing perforated plate 161, the second sound-absorbing perforated plate 162, the third sound-absorbing perforated plate 163, and the fourth sound-absorbing perforated plate 164 are all perforated metal bent parts filled with fiberglass, absorbing noise to achieve a noise reduction effect, capable of absorbing mid-to-high frequency noise. Simultaneously, the air outlet of the air outlet louver 117 of the indoor unit 10 can be appropriately enlarged; the air outlet parameters of the air outlet louver 117 can be found in [reference missing]. Figures 7 to 9 While maintaining the same airflow volume, the increased flow area can effectively reduce the oncoming wind speed and airflow-generated noise when air flows through the air outlet louvers 117, which is beneficial for reducing low-frequency noise components. This allows the indoor unit 10 to effectively control the overall operating noise level while ensuring high airflow output.

[0042] like Figure 5 As shown, in some embodiments, the first chassis 11 further includes a base 119 connected to the bottom of the first frame 111. The base 119 may include a base plate, a cover plate, and sheet metal parts connected to the base plate and the cover plate. The cover plate is connected to the bottom of the first frame 111. The sheet metal parts may be Q235B sheet metal bending parts with an outer layer thickness of 5.0mm. They are welded with the base plate and the cover plate to form a sealed and stable cavity. The cavity is filled with foam to form a stable base structure to achieve the purpose of shock resistance.

[0043] like Figure 3As shown, in some embodiments, the first chassis 11 further includes a plurality of connecting brackets 1110 connected to the outer side of the second side plate 113. The connecting brackets 1110 may be two oppositely arranged. The connecting brackets 1110 may be made of Q235B carbon steel with a thickness of 3.0mm. Their main function is to connect with the mounting wall and increase the stability of the unit installation.

[0044] like Figures 2 to 4 As shown, in some embodiments, the first side plate 112 is provided with a first air inlet, and the first evaporator 12 is disposed opposite to the first air inlet. Air from the environment enters the first evaporator 12 through the first air inlet for heat exchange. The second side plate 113 is provided with a second air inlet, and the second evaporator 13 is disposed opposite to the second air inlet. Air from the environment enters the second evaporator 13 through the second air inlet for heat exchange and is then discharged by the blower 14 through the air outlet louvers 117. Preferably, both the first air inlet and the second air inlet can be rectangular holes.

[0045] like Figure 2 and Figure 3 As shown, in some embodiments, the indoor unit 10 may further include a first air inlet grille assembly 1112 disposed on the first side panel 112 and covering the first air inlet hole. The first air inlet grille assembly 1112 includes a first air inlet grille and a first filter screen disposed inside the first air inlet grille. The size of the through hole of the first air inlet grille may be 20mm × 20mm. The first air inlet grille may be made of Q235B carbon steel plate with a thickness of 1.0mm. The first filter screen may be made of aluminum alloy filter screen, and the mesh size of the first filter screen may be 20 mesh. The main function of the first air inlet grille assembly 1112 is to filter particulate dust from the gas, preventing particulate dust from entering the first evaporator 12, causing dirt blockage, and thus affecting the heat exchange capacity of the first evaporator 12.

[0046] Similarly, the indoor unit 10 may also include a second air inlet grille assembly 1113 disposed on the second side panel 113 and covering the second air inlet hole. The second air inlet grille assembly 1113 includes a second air inlet grille and a second filter screen disposed inside the second air inlet grille. The second air inlet grille may be made of Q235B carbon steel plate with a thickness of 1.0mm, and the size of the through hole of the second air inlet grille may be 20mm×20mm. The second filter screen may be made of aluminum alloy and the mesh size of the second filter screen may be 20 mesh. The main function of the second air inlet grille assembly 1113 is to filter particulate dust from the gas, preventing particulate dust from entering the second evaporator 13, causing dirt blockage, and thus affecting the heat exchange capacity of the second evaporator 13.

[0047] like Figure 4As shown, in some embodiments, the indoor unit 10 further includes an expansion valve 17 disposed in the first installation space, and the indoor unit 10 further includes a dryer filter 18 disposed in the first installation space. The dryer filter 18 may be disposed upstream of the expansion valve 17. The function of the dryer filter 18 is to prevent impurities or moisture in the refrigeration system pipeline from entering the expansion valve 17, so as to avoid the expansion valve 17 from becoming dirty or iced and thus interrupting the refrigerant flow.

[0048] like Figure 2 As shown, in some embodiments, the fourth side plate 115 may also be provided with a plurality of gland heads 19, which are used for cable entry and exit, and can play the role of fixing the cable to prevent pull-out and sealing protection.

[0049] like Figure 2 As shown, in some embodiments, the lower part of the fourth side plate 115 may also be provided with a first liquid pipe 110, a first gas pipe 120 and a drain pipe 130. The first liquid pipe 110 and the first gas pipe 120 are used for refrigerant exchange between the indoor unit 10 and the outdoor unit 20, and the drain pipe 130 is used for the discharge of condensate from the water collection pan inside the indoor unit 10.

[0050] like Figure 4 and Figure 5 As shown, in some embodiments, both the first evaporator 12 and the second evaporator 13 are integral copper heat exchangers composed of copper tubes and copper fins. Specifically, conventional commercial-grade industrial air conditioners use ordinary aluminum fins or coated aluminum fins. Although coated aluminum fins have a certain degree of corrosion resistance compared to ordinary aluminum fins, the coating on some fins inevitably gets damaged due to the processing technology. In outdoor environments with high salinity, they still suffer from corrosion and powdering, resulting in loss of heat exchange capacity. Therefore, commercial-grade industrial air conditioners cannot meet the design life requirement of 60 years for nuclear power plants, the corrosion resistance requirement of C5, and the requirement to maintain structural integrity and functionality under accident environmental conditions (earthquakes, tornadoes, explosion shock waves, aging). In this application, both the first evaporator 12 and the second evaporator 13 are integral copper heat exchangers composed of copper tubes and copper fins. This not only fundamentally eliminates the risk of electrochemical corrosion that may occur from contact between dissimilar metals, but also fully utilizes the inherent excellent chemical corrosion resistance of copper to ensure that the fins and tube walls of the first evaporator 12 and the second evaporator 13 can still maintain their complete geometry and good thermal conductivity when they are exposed to a highly corrosive factory environment for a long time.

[0051] In some embodiments, the main structural components of the first chassis 11, such as the first frame 111, the first side plate 112, the second side plate 113, the third side plate 114, the fourth side plate 115, and the top plate 116, undergo surface pretreatment such as pickling and rust removal, phosphating, and sandblasting. Then, a multi-coat spraying process is applied, including epoxy zinc-rich primer, epoxy intermediate coat, and polyurethane topcoat. The surface treated by this process can meet the technical requirement of a neutral salt spray test time greater than 2000 hours, satisfying the C5 corrosion resistance rating of the plant and the 60-year design life of the unit.

[0052] Specifically, 1. Before painting, the metal surface must be degreased and derusted. The time after degreasing and derusting should not exceed 24 hours. Sandblasting is also required before painting. Carbon steel materials must be painted within 8 hours after sandblasting, and galvanized materials within 12 hours.

[0053] 2. The surface of the treated carbon steel material should reach Sa2.5 grade, and the galvanized material should be cleaned with sand.

[0054] 3. Spraying methods: air spraying, airless spraying.

[0055] 4. Paint mixing ratio (by weight): Epoxy zinc-rich primer HD-158 (base material): Hardener: Thinner = 10:1:10-20%; Epoxy zinc phosphate primer HD-155 (base material): Hardener: Thinner = 7:1:10-20%; Epoxy micaceous iron oxide intermediate paint (base material): Hardener: Thinner = 7:1:10-20%; Polyurethane enamel (base material): Hardener: Thinner = 6:1:10-20%; Film thickness: Primer: 70~80 micrometers, intermediate coat: 150~160 micrometers, topcoat: 60~70 micrometers, total coating thickness: 280~310 micrometers.

[0056] Of course, this processing technology can be adjusted appropriately according to actual needs, and no specific limitations are made here.

[0057] The following is a detailed introduction to the outdoor unit 20.

[0058] like Figures 10 to 17As shown, the outdoor unit 20 includes a second casing 21, which may be generally square columnar in shape, such as a square columnar or rectangular columnar structure. The second casing 21 includes a second frame 211, and further includes a first panel 212, a second panel 213, a first microporous protective grille 214, and a second microporous protective grille 215 disposed on the second frame 211. The first panel 212 and the second panel 213 are disposed opposite to each other, and the first microporous protective grille 214 and the second microporous protective grille 215 are disposed opposite to each other. The second casing 21 contains a first condenser 22 and a second condenser 23 disposed opposite to each other. The first condenser 22 is disposed opposite to the first microporous protective grille 214, and the second condenser 23 is disposed opposite to the second microporous protective grille 215. A condensing fan 24 is disposed on the top cover plate 2111 of the second casing 21, and a third microporous protective grille 25 is disposed on the top of the outer casing of the condensing fan 24.

[0059] The outdoor unit 20 of the present invention is provided with microporous protective grilles on the air inlet side of the first condenser 22 and the second condenser 23 and on the top exhaust side of the condenser fan 24, which can effectively prevent shock waves and flying objects from entering the interior of the second casing 21.

[0060] like Figures 10 to 17 As shown, in some embodiments, the second frame 211 is made of stainless steel or carbon steel; the first panel 212, the second panel 213, the first microporous protective grille 214, and the second microporous protective grille 215 are made of carbon steel. Stainless steel includes, but is not limited to, 316L stainless steel, and carbon steel includes, but is not limited to, Q235B steel.

[0061] Specifically, the second frame 211 is made of stainless steel or carbon steel. It can be composed of multiple crossbeams and longitudinal beams connected together, and can be manufactured using an integral welding process, forming a monolithic frame structure and eliminating weak points in the connections. The first panel 212, second panel 213, first microporous protective grille 214, and second microporous protective grille 215 are made of carbon steel plate and are bolted to the aforementioned monolithic second frame 211, together forming a complete rigid enclosure (i.e., the second housing 21). This design ensures that the outdoor unit 20 can effectively maintain structural integrity and stability when subjected to accidental loads, guaranteeing safety under extreme operating conditions. Furthermore, the bottom of the second frame 211 is also provided with a base 2112. The base 2112 may include a bottom plate, a cover plate, and sheet metal parts connected to the bottom plate and the cover plate. The cover plate is connected to the bottom of the second frame 211. The sheet metal parts may be Q235B sheet metal bending parts with an outer layer thickness of 5.0mm. They are welded with the bottom plate and the cover plate to form a closed and stable cavity. The cavity is filled with foam to form a stable base structure to achieve the purpose of earthquake resistance.

[0062] like Figure 16 As shown, in some embodiments, the outdoor unit 20 further includes a first metal filter 216 and a second metal filter 217. The first metal filter 216 is disposed inside the first microporous protective grille 214, and the second metal filter 217 is disposed inside the second microporous protective grille 215. The inner first metal filter 216 is attached to the first microporous protective grille 214, effectively strengthening the structural strength of the first microporous protective grille 214 while also blocking individual small objects. Similarly, the inner second metal filter 217 is attached to the second microporous protective grille 215, effectively strengthening the structural strength of the second microporous protective grille 215 while also blocking individual small objects.

[0063] The outdoor unit 20 of the present invention is provided with a double-layer protective structure (microporous protective grille and metal filter screen) on the air inlet side of the first condenser 22 and the second condenser 23, which can effectively resist the intrusion of shock waves and flying objects into the interior of the second casing 21.

[0064] Furthermore, in some embodiments, the outdoor unit 20 also includes a third metal filter screen, which is disposed inside the third microporous protective grille 25. The outdoor unit 20 of the present invention has a double-layer protective structure (third microporous protective grille 25 and third metal filter screen) on the exhaust side at the top of the condenser fan 24, which can effectively resist shock waves and projectiles from entering the interior of the second casing 21. The inner third metal filter screen is fitted to the third microporous protective grille 25, effectively strengthening the structural strength of the third microporous protective grille 25 while also blocking individual small objects.

[0065] In some embodiments, the through-hole size of the first microporous protective grille 214 and the second microporous protective grille 215 is 20mm × 20mm; the mesh size of the first metal filter 216 and the second metal filter 217 is 20 mesh. Similarly, the through-hole size of the third microporous protective grille 25 is 20mm × 20mm; the mesh size of the third metal filter is 20 mesh.

[0066] Preferably, the first microporous protective grille 214 and the second microporous protective grille 215 can be made of Q235B carbon steel plate with a thickness of 3.0mm, and the first metal filter 216 and the second metal filter 217 can be, but are not limited to, aluminum alloy filter or stainless steel filter. The third microporous protective grille 25 can be made of Q235B carbon steel plate with a thickness of 3.0mm, and the third metal filter can be, but is not limited to, aluminum alloy filter or stainless steel filter.

[0067] In this application, driven by the condenser fan 24, external air enters from the first microporous protective grille 214 and the second microporous protective grille 215 on both sides of the outdoor unit 20. The first microporous protective grille 214 and the second microporous protective grille 215 can effectively resist shock wave loads and mechanically block large particles of sand, gravel, and other flying objects. Subsequently, the external air passes through the internal first metal filter 216 and the second metal filter 217, which can efficiently filter out fine particles such as sand and dust, preventing blockage or wear of the fin gaps between the first condenser 22 and the second condenser 23, thus affecting heat dissipation efficiency. On the exhaust side, the third microporous protective grille 25 and the third metal filter on the top of the condenser fan 24 can prevent shock waves and flying objects from invading from the exhaust port in the opposite direction and causing impact damage to the blades of the high-speed rotating condenser fan 24.

[0068] like Figure 15As shown, in some embodiments, both the first condenser 22 and the second condenser 23 are integral copper heat exchangers composed of copper tubes and copper fins. Specifically, conventional commercial-grade industrial air conditioners use ordinary aluminum fins or coated aluminum fins. Although coated aluminum fins have a certain degree of corrosion resistance compared to ordinary aluminum fins, the processing technology inevitably damages some of the coating on the fins. In outdoor environments with high salinity, they still suffer from corrosion and powdering, resulting in a loss of heat exchange capacity. Therefore, commercial-grade industrial air conditioners cannot meet the design life requirement of 60 years for nuclear power plants, the corrosion resistance requirement of C5, and the requirement to maintain structural integrity and functionality under accident environmental conditions (earthquakes, tornadoes, explosion shock waves, aging). In this application, both the first condenser 22 and the second condenser 23 are integral copper heat exchangers composed of copper tubes and copper fins. This not only fundamentally eliminates the risk of electrochemical corrosion that may occur from contact between dissimilar metals, but also fully utilizes the inherent excellent chemical corrosion resistance of copper to ensure that the fins and tube walls of the first condenser 22 and the second condenser 23 can maintain their complete geometric shape and good heat transfer performance when exposed to a highly corrosive factory environment for a long time.

[0069] See Figure 14 and Figure 18 In some embodiments, the outdoor unit 20 further includes a gas-liquid separator 26, a compressor 27, an oil separator 28, and a liquid receiver 29 disposed in the second housing 21. The gas-liquid separator 26, the compressor 27, the oil separator 28, and the liquid receiver 29 are connected in sequence, and their connection method can be found in [reference needed]. Figure 18 .

[0070] The gas-liquid separator 26 is installed in front of the suction port of the compressor 27 to separate the gas and liquid, ensuring that the refrigerant returning to the compressor 27 is pure gas.

[0071] The compressor 27 is used to pressurize the refrigerant so that the refrigerant can circulate within the refrigeration system.

[0072] The oil separator 28 is installed after the discharge pipe of the compressor 27 to separate the refrigeration oil mixed in the gaseous refrigerant and send it back to the compressor 27 to prevent the compressor 27 from running out of oil.

[0073] The receiver 29 can automatically adjust the amount of refrigerant circulating in the system according to the size of the air conditioning load. It is similar to a water storage tank, releasing refrigerant when more refrigerant is needed and storing it when there is excess refrigerant in the system.

[0074] See Figure 14 and Figure 15 In some embodiments, the outdoor unit 20 also includes a power supply box 210 located in the second chassis 21, which safely distributes the main power supply (usually 380V three-phase or 220V single-phase) to various components such as the compressor 27 and the condenser fan 24.

[0075] See Figure 15 In some embodiments, the second chassis 21 may also be provided with a second liquid pipe 2101 and a second gas pipe 2102, which may be mounted on the second panel 213. The second liquid pipe 2101 is connected to the indoor unit 10 via a refrigerant connection pipe, serving to transport liquid refrigerant. The second gas pipe 2102 is connected to the indoor unit 10 via a refrigerant connection pipe, serving to transport gaseous refrigerant.

[0076] In some embodiments, the main structural components of the second chassis 21, such as the second frame 211, the first panel 212, the second panel 213, the first microporous protective grille 214, the second microporous protective grille 215, and the third microporous protective grille 25, undergo surface pretreatment processes such as pickling and rust removal, phosphating, and sandblasting. Then, a multi-coat spraying process is applied, consisting of epoxy zinc-rich primer, epoxy intermediate coat, and polyurethane topcoat. The surface treated by this process can meet the technical requirement of a neutral salt spray test time greater than 2000 hours, satisfying the C5 corrosion resistance rating of the plant and the 60-year design life of the unit.

[0077] Specifically, 1. Before painting, the metal surface must be degreased and derusted. The time after degreasing and derusting should not exceed 24 hours. Sandblasting is also required before painting. Carbon steel materials must be painted within 8 hours after sandblasting, and galvanized materials within 12 hours.

[0078] 2. The surface of the treated carbon steel material should reach Sa2.5 grade, and the galvanized material should be cleaned with sand.

[0079] 3. Spraying methods: air spraying, airless spraying.

[0080] 4. Paint mixing ratio (by weight): Epoxy zinc-rich primer HD-158 (base material): Hardener: Thinner = 10:1:10-20%; Epoxy zinc phosphate primer HD-155 (base material): Hardener: Thinner = 7:1:10-20%; Epoxy micaceous iron oxide intermediate paint (base material): Hardener: Thinner = 7:1:10-20%; Polyurethane enamel (base material): Hardener: Thinner = 6:1:10-20%; Film thickness: Primer: 70~80 micrometers, intermediate coat: 150~160 micrometers, topcoat: 60~70 micrometers, total coating thickness: 280~310 micrometers.

[0081] Of course, this processing technology can be adjusted appropriately according to actual needs, and no specific limitations are made here.

[0082] See Figure 18 The indoor unit 10 and the outdoor unit 20 are connected by a refrigerant connection pipe. The refrigerant connection pipe is generally made of stainless steel or copper and can be welded with a copper socket.

[0083] Working principle: The high-temperature and high-pressure refrigerant gas of the compressor 27 of the outdoor unit 20 is condensed into liquid in the first condenser 22 and the second condenser 23 of the outdoor unit 20. It is then sent to the evaporator of the indoor unit 10 through the liquid pipe. In the first evaporator 12 and the second evaporator 13, it evaporates and absorbs heat, becoming a low-temperature and low-pressure gas. Then it returns to the compressor 27 of the outdoor unit 20 through the gas pipe, and the cycle continues.

[0084] It is understood that the above embodiments only illustrate preferred embodiments of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can freely combine the above technical features without departing from the concept of the present invention, and can also make several modifications and improvements, all of which fall within the protection scope of the present invention. Therefore, all equivalent transformations and modifications made with respect to the scope of the claims of the present invention should fall within the scope of the claims of the present invention.

Claims

1. A nuclear safety-grade compact unit-type split air conditioner, characterized in that, Including an indoor unit (10) and an outdoor unit (20) that are connected to each other; The indoor unit (10) includes a first chassis (11), the first chassis (11) includes a first frame (111), the first frame (111) is a square column structure, the first chassis (11) also includes a first side plate (112), a second side plate (113), a third side plate (114), a fourth side plate (115) and a top plate (116) disposed on the first frame (111), the first side plate (112) and the second side plate (113) are disposed opposite to each other, the third side plate (114) and the fourth side plate (115) are disposed opposite to each other; the first chassis ( 11) It has a first installation space and a second installation space, the first installation space being located below the second installation space; the indoor unit (10) includes a first evaporator (12) and a second evaporator (13) disposed in the first installation space and arranged opposite to each other, the first evaporator (12) being arranged opposite to the first side panel (112), and the second evaporator (13) being arranged opposite to the second side panel (113); the second installation space is provided with a blower (14), and the portion of the first side panel (112) opposite to the air outlet side of the blower (14) is provided with air outlet louvers (117). The outdoor unit (20) includes a second chassis (21), the second chassis (21) includes a second frame (211), the second chassis (21) also includes a first panel (212), a second panel (213), a first microporous protective grille (214) and a second microporous protective grille (215) disposed on the second frame (211), the first panel (212) and the second panel (213) are disposed opposite to each other, the first microporous protective grille (214) and the second microporous protective grille (215) are disposed opposite to each other, the second chassis (21) is provided with a first condenser (22) and a second condenser (23) disposed opposite to each other, the first condenser (22) and the first microporous protective grille (214) are disposed opposite to each other, the second condenser (23) and the second microporous protective grille (215) are disposed opposite to each other, the top cover plate of the second chassis (21) is provided with a condensing fan (24), and the top of the outer shell of the condensing fan (24) is provided with a third microporous protective grille (25).

2. The nuclear safety-grade compact unit-type split air conditioner according to claim 1, characterized in that, The first frame (111) is made of stainless steel or carbon steel, and the first side plate (112), the second side plate (113), the third side plate (114), the fourth side plate (115) and the top plate (116) are made of carbon steel.

3. The nuclear safety-grade compact unit-type split air conditioner according to claim 1, characterized in that, The second frame (211) is made of stainless steel or carbon steel; the first panel (212), the second panel (213), the first microporous protective grid (214) and the second microporous protective grid (215) are made of carbon steel.

4. The nuclear safety-grade compact unit-type split air conditioner according to claim 1, characterized in that, The first frame (111) is provided with a partition (118), which is parallel to and spaced apart from the top plate (116). The partition (118) defines the first installation space and the second installation space in the inner cavity of the first chassis (11). The blower (14) is installed on the partition (118). The partition (118) is also provided with air holes (1181) that penetrate its upper and lower surfaces.

5. The nuclear safety-grade compact unit-type split air conditioner according to claim 4, characterized in that, The blower (14) includes a mounting bracket (141), a motor (142), and a centrifugal fan (143) without a volute. The mounting bracket (141) is mounted on the partition plate (118), the volute-less centrifugal fan (143) is located in the inner cavity of the mounting bracket (141), the motor (142) is mounted on the mounting bracket (141) and the motor (142) is connected to the volute-less centrifugal fan (143).

6. The nuclear safety-grade compact unit-type split air conditioner according to claim 5, characterized in that, A heater (15) is also provided in the first installation space, and the heater (15) is located above the first evaporator (12) and the second evaporator (13).

7. The nuclear safety-grade compact unit-type split air conditioner according to claim 1, characterized in that, The indoor unit (10) further includes a sound-absorbing component (16) installed in the second installation space and disposed opposite to the blower (14). The sound-absorbing component (16) includes a first sound-absorbing perforated plate (161), a second sound-absorbing perforated plate (162), a third sound-absorbing perforated plate (163) and a fourth sound-absorbing perforated plate (164). The first sound-absorbing perforated plate (161) is disposed opposite to the air outlet louver (117), the second sound-absorbing perforated plate (162) is disposed opposite to the third sound-absorbing perforated plate (163), and the fourth sound-absorbing perforated plate (164) is disposed opposite to the top plate (116).

8. The nuclear safety grade compact unit-type split air conditioner according to claim 1, characterized in that, The outdoor unit (20) also includes a first metal filter (216) and a second metal filter (217). The first metal filter (216) is located inside the first microporous protective grille (214), and the second metal filter (217) is located inside the second microporous protective grille (215).

9. The nuclear safety grade compact unit-type split air conditioner according to claim 8, characterized in that, The through-hole size of the first microporous protective grid (214) and the second microporous protective grid (215) is 20mm×20mm; The first metal filter (216) and the second metal filter (217) have a mesh size of 20.

10. The nuclear safety-grade compact unit-type split air conditioner according to claim 1, characterized in that, Both the first evaporator (12) and the second evaporator (13) are integral copper heat exchangers composed of copper tubes and copper fins.

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