direct expansion machine

Abstract

The utility model relates to a kind of direct expansion machines, it includes outer machine component and inner machine component, outer machine component includes inner machine frame body and the compressor and outer machine heat exchanger being set in outer machine frame body;Inner machine component includes inner machine frame body and fan piece and inner machine heat exchanger being set in inner machine frame body;Wherein, outer machine frame body and inner machine frame body are fixed between by outer connecting piece, outer connecting piece includes vertical fixed part and the horizontal fixed part located in the both sides of vertical fixed part, the both ends of vertical fixed part are respectively used to with the vertical beam of outer machine frame body and inner machine frame body Fixed, horizontal fixed part is respectively used to with the two cross beams of outer machine frame body and inner machine frame body adjacent contact Fixed;The structure of outer connecting piece is simple, and assembling and disassembling process is convenient and fast, the structure of outer connecting piece can realize the fixed connection between outer machine component and inner machine component in each direction, and when equipment compartment door body height is insufficient, inner machine component and outer machine component can be disassembled and enter after assembly separately, and the degree of flexibility is stronger.

Description

Technical Field

[0001] This utility model belongs to the field of air conditioning equipment technology, and in particular relates to a direct expansion machine. Background Technology

[0002] A direct expansion compressor is a type of air handling unit that uses direct expansion. It is widely used in air conditioning systems in commercial and industrial environments. Its working principle is to absorb heat through the direct evaporation of refrigerant and exchange heat indirectly with the air. A direct expansion compressor typically consists of an indoor unit and an outdoor unit. The indoor unit is responsible for drawing in air and heating or cooling it, while the outdoor unit delivers refrigerant to the indoor unit through pipes to achieve the function of cooling or heating.

[0003] Currently, the internal and external units of direct expansion machines are usually installed separately. This requires long-distance laying of connecting pipes and lines between the internal and external units, posing safety hazards. Furthermore, the separate installation of the external and internal units results in a large footprint for the direct expansion machine, making installation difficult and transportation inconvenient. While there are existing technologies that integrate the internal and external units, they lack simple, universal, and effective connection and fixing structures. The layout of internal components of the direct expansion machine is also not very rational, making inspection and maintenance inconvenient. Utility Model Content

[0004] The purpose of this utility model is to provide a direct expansion machine to solve the problems of existing direct expansion machines having a split design, long-distance connecting pipes and lines between the inner and outer machine components, low safety, large footprint, and inconvenient maintenance.

[0005] To achieve the above-mentioned objectives, the present invention employs the following technical solution: This utility model proposes a direct expansion machine, which includes: Outdoor unit components, including: The outdoor unit frame, wherein at least a top panel and a side panel are provided on the outdoor unit frame; and The compressor and the outdoor unit heat exchanger are installed inside the outdoor unit frame; Indoor unit components, including: The indoor unit frame, wherein at least an indoor unit base plate and an indoor unit side plate are provided on the indoor unit frame; and The fan components and the indoor unit heat exchanger are installed in the indoor unit frame; The outdoor unit frame and the indoor unit frame are fixed together by an external connector. The external connector includes a vertical fixing part and a horizontal fixing part located on both sides of the vertical fixing part. The two ends of the vertical fixing part are respectively used to fix the upright beams of the outdoor unit frame and the indoor unit frame. The horizontal fixing parts are respectively used to fix the two horizontal beams that are in adjacent contact with the outdoor unit frame and the indoor unit frame.

[0006] In some embodiments of this application, the indoor unit base plate and the outdoor unit top plate are further fixed by an internal connector. The internal connector includes a symmetrically arranged upper connecting plate and a lower connecting plate. The upper connecting plate is located above the indoor unit base plate, and the lower connecting plate is located below the outdoor unit top plate. The internal connector is provided with at least two fasteners. One fastener is used to connect the internal connector, the indoor unit base plate, and the outdoor unit top plate, and the other fastener is used to connect the internal connector, the indoor unit frame, and the indoor unit frame.

[0007] The internal connector further connects and fixes the indoor unit base plate in the indoor unit assembly and the outdoor unit top plate in the outdoor unit assembly. The internal connector is also fixed to the indoor unit frame and the indoor unit frame by fasteners, which further improves the stability of the connection.

[0008] In some embodiments of this application, the indoor unit assembly is further provided with a horizontal partition plate, which divides the indoor unit assembly into a first indoor unit cavity and a second indoor unit cavity arranged vertically. A fan component is provided in the first indoor unit cavity, and an indoor unit heat exchanger is provided in the second indoor unit cavity.

[0009] The partition divides the indoor unit assembly into a first indoor unit cavity and a second indoor unit cavity, which are used to install the fan components and the indoor unit heat exchanger, respectively. The partition plate is also equipped with an air inlet that connects to the air inlet of the fan unit. After heat exchange by the indoor unit heat exchanger, the airflow passes through the air inlet and the fan unit and is output from the top air outlet of the indoor unit assembly.

[0010] In some embodiments of this application, the partition plate is installed on the indoor unit frame by a support member. Each support member includes a support stand and fixed feet located at both ends of the support stand. The support stand is fixed to the inner side of the upright beam of the indoor unit frame by fasteners. The fixed feet located at the upper end of the support stand are fixed below the partition plate, and the fixed feet located at the lower end of the support stand are fixed to the crossbeam of the indoor unit frame.

[0011] The bottom of the partition is equipped with a support component, which is located inside the inner frame of the indoor unit and serves as a support. Both the support component and the upright beam of the inner frame are angle steel structures. The support component is located inside the upright beam to avoid occupying the space of the second inner frame and improve space utilization.

[0012] In some embodiments of this application, an air inlet is formed on the side panel of the indoor unit, an air outlet is provided on the top panel of the indoor unit, the indoor unit heat exchanger is arranged obliquely in the second indoor unit cavity, and the first indoor unit cavity and the second indoor unit cavity are connected so that the airflow input from the air inlet passes through the indoor unit heat exchanger and the fan component, and is output from the air outlet.

[0013] In addition to the indoor unit base plate and indoor unit side plate, the indoor unit assembly also has an indoor unit top plate. An air outlet is provided on the indoor unit top plate, which is connected to the first indoor unit cavity. The indoor unit heat exchanger is arranged at an angle, which is beneficial to increasing the heat exchange area of ​​the airflow.

[0014] In some embodiments of this application, a first water receiving tray is provided at the bottom of the second indoor unit cavity, and a second water receiving tray is provided below the outdoor unit assembly. The first water receiving tray and the second water receiving tray are connected by a drain pipe. The bottom plate of the indoor unit and the top plate of the outdoor unit are provided with through mounting holes for the drain pipe to pass through.

[0015] In some embodiments of this application, the indoor unit base plate and the outdoor unit top plate are further provided with wire harness connectors for power cords and communication lines to pass through.

[0016] The power cord and communication cable are used to connect to the working components such as the fan, and are used to supply power and transmit signals to the working components such as the fan.

[0017] In some embodiments of this application, a first refrigerant pipeline is connected between the outdoor unit heat exchanger and the indoor unit heat exchanger, and a second refrigerant pipeline is connected between the indoor unit heat exchanger and the compressor. Two through holes are also provided on the indoor unit bottom plate and the outdoor unit top plate, respectively for the first refrigerant pipeline and the second refrigerant pipeline to pass through.

[0018] In some embodiments of this application, the front side of the indoor unit assembly is provided with a first maintenance door and a second maintenance door arranged vertically, the first maintenance door corresponding to the position of the first indoor unit cavity; the second maintenance door corresponding to the position of the second indoor unit cavity; The air inlet is positioned opposite the second inspection door, and a filter is also provided on the outside of the air inlet.

[0019] The first inspection door is used to facilitate the inspection and maintenance of the fan components, and the second inspection door is used to facilitate the inspection and maintenance of the indoor unit's heat exchanger.

[0020] In some embodiments of this application, the outdoor unit heat exchanger is a shell-and-tube heat exchanger, and the two ports of the shell-and-tube heat exchanger are fixed to the crossbeam of the indoor unit frame by a support plate. The outdoor unit assembly is also provided with a decorative panel for covering the outside of the supporting upright plate, and the outer wall of the decorative panel is flush with the side plate of the outdoor unit.

[0021] Decorative panels are used to improve the aesthetics of outdoor unit components and enhance their overall appearance.

[0022] Compared with the prior art, the advantages and positive effects of this utility model are: The direct expansion machine involved in this application has an outer unit assembly and an inner unit assembly fixed into an integral structure by an external connector. The external connector is located at the four corners of the outer unit assembly and the inner unit assembly, including a vertical fixing part and a horizontal fixing part located on both sides of the vertical fixing part. The two ends of the vertical fixing part are fixed to the vertical beams of the outer unit assembly and the inner unit assembly respectively. The two horizontal fixing parts are arranged vertically between each other and correspond to the positions of the two horizontal beams adjacent to the outer unit assembly and the inner unit assembly. That is, the horizontal fixing part on one side is fixedly connected to the two horizontal beams on the corresponding side of the outer unit assembly and the inner unit assembly, and the horizontal fixing part on the other side is fixedly connected to the two adjacent horizontal beams. The integrated layout of the direct expansion machine occupies less space, is easy to standardize and assemble, has a simple structure for the external connectors, and is convenient and quick to assemble and disassemble. The structure of the external connectors can achieve fixed connection between the external and internal components in all directions. Moreover, when the height of the equipment room door is insufficient, the internal and external components can be disassembled and installed separately, which is more flexible.

[0023] Other features and advantages of this utility model will become clearer after reading the specific embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is an external structural diagram of a direct expansion machine according to an embodiment; Figure 2 This is a split view of the indoor unit assembly and the outdoor unit assembly according to an embodiment; Figure 3 This is a structural diagram of the internal structure of a direct expansion machine according to an embodiment; Figure 4 This is a structural diagram of the external connector according to an embodiment; Figure 5 This is a schematic diagram of the rear side of the direct expansion machine according to an embodiment; Figure 6 According to the embodiments Figure 5 A magnified diagram of point A in the diagram; Figure 7 This is a diagram showing the internal structure of the internal components according to an embodiment; Figure 8 This is a schematic diagram of the partition plate installation according to an embodiment; Figure 9 This is a structural diagram of the support member according to an embodiment; Figure 10 This is a structural diagram of the base assembly according to an embodiment; Figure 11 This is an exploded view of the base assembly according to an embodiment; Figure 12 This is a bottom view of the base assembly according to an embodiment; Figure 13 This is a structural diagram of the front side of the support base according to an embodiment; Figure 14 This is a structural diagram of the rear side of the support base according to an embodiment; Figure 15 This is an exploded view of the second water receiving tray and the support base according to an embodiment; Figure 16 This is a structural diagram of the forklift component according to an embodiment; Figure 17 This is a structural diagram of the protective component according to an embodiment; Figure label: 10. Vertical beam; 11. Central vertical beam; 20. Horizontal beam; 21. Central horizontal beam; 100. Indoor unit components; 110. Indoor unit frame; 120. Indoor unit side panel; 121. First access door; 122. Second access door; 130. Indoor unit base plate; 131. Indoor unit heat exchanger; 140. Middle partition; 141. Fan component; 150. Indoor unit top panel; 151. Air outlet; 160. Support component; 161. Support upright; 162. Fixing foot; 170. Filter; 200. Outdoor unit components; 210. Outdoor unit frame; 220. Outdoor unit side panel; 221. Third access door; 222. Fourth access door; 230. Outdoor unit top panel; 240. Compressor; 250. Outdoor unit heat exchanger; 260. Electrical control box; 270. Decorative panel; 300. Base assembly; 310. Support base; 311. Front beam; 312. Rear beam; 313. Side beam; 314. Support bottom beam; 315. Clearance slot; 320. Forklift transport; 321. Install crossbeams; 322. Install side frames; 323. Forklift beams; 330. Protective component; 331. Heat dissipation hole; 332. Connecting outer edge; 340. Connecting angle steel; 350. Second water receiving tray; 351. Drainage section; 410. External connector; 411. Vertical fixing part; 412. Horizontal fixing part; 420. Internal connector; 421. Positioning bend. Detailed Implementation

[0026] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0027] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0028] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0029] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0030] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0031] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0032] In this application, the air conditioner performs a refrigeration cycle by using a compressor, condenser, expansion valve, and evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation to cool or heat an indoor space.

[0033] Direct expansion compressors cool or heat air by directly expanding the refrigerant in the evaporator and absorbing heat, making them highly efficient and energy-saving. A typical direct expansion compressor includes core components such as a compressor, condenser, expansion valve, and evaporator, and is suitable for locations requiring precise temperature and humidity control, such as data centers, laboratories, and hospitals.

[0034] The working principle of a direct expansion compressor is that the refrigerant evaporates in the evaporator, absorbing heat from the air and thus achieving a cooling effect. The refrigerant is then compressed into a high-temperature, high-pressure gas by the compressor, releases heat through the condenser, and then passes through the expansion valve to reduce its pressure before re-entering the evaporator for recirculation. This cycle allows the direct expansion compressor to continuously provide a stable amount of cooling or heating.

[0035] refer to Figures 1-3 This utility model proposes a direct expansion machine, which includes an inner machine assembly 100, an outer machine assembly 200 and a base assembly 300 arranged from top to bottom.

[0036] The outdoor unit assembly 200 includes an outdoor unit frame 210 and working components such as a compressor 240 and an outdoor unit heat exchanger 250 disposed in the outdoor unit frame 210.

[0037] The outdoor unit frame 210 is a frame structure, consisting of interconnected vertical beams 10 and horizontal beams 20.

[0038] The outdoor unit frame 210 is provided with at least an outdoor unit top plate 230 and an outdoor unit side plate 220. The outdoor unit top plate 230 is located on the top of the outdoor unit frame 210, and the outdoor unit side plate 220 is located on the periphery of the outdoor unit frame 210.

[0039] The indoor unit assembly 100 includes an indoor unit frame 110 and a fan component 141 and an indoor unit heat exchanger 131 disposed in the indoor unit frame 110.

[0040] The indoor unit frame 110 is a frame structure, consisting of interconnected vertical beams 10 and horizontal beams 20.

[0041] The indoor unit frame 110 is provided with at least an indoor unit bottom plate 130 and an indoor unit side plate 120; the indoor unit bottom plate 130 is located at the bottom of the indoor unit frame 110, and the indoor unit side plate 120 is located on the periphery of the indoor unit frame 110.

[0042] The indoor unit assembly 100 and the outdoor unit assembly 200 are an integral structure arranged vertically, and the base assembly 300 is located below the outdoor unit assembly 200.

[0043] refer to Figure 4 The outdoor unit frame 210 and the indoor unit frame 110 are fixed together by an external connector 410. The external connector 410 includes a vertical fixing part 411 and a horizontal fixing part 412 located on both sides of the vertical fixing part 411.

[0044] Specifically, the two horizontal fixing parts 412 are arranged perpendicularly to each other, the outer connector 410 is an integral structure, and the vertical fixing part 411 and the horizontal fixing parts 412 on both sides are integrally formed.

[0045] The two ends of the vertical fixing part 411 are used to fix the upright beams of the outdoor unit frame 210 and the indoor unit frame 110, respectively, and the horizontal fixing part 412 is used to fix the two horizontal beams 20 that are in adjacent contact with the outdoor unit frame 210 and the indoor unit frame 110, respectively.

[0046] The vertical beams 10 and horizontal beams 20 in the outdoor unit frame 210 and the indoor unit frame 110 are both angle steel to ensure their structural strength.

[0047] The vertical fixing part 411 is an angle steel structure, which is connected to the outside of the outdoor unit frame 210 and the indoor unit frame 110. Fixing holes are provided at both ends of the vertical fixing part 411. Corresponding fixing holes are also provided at the corresponding positions of the vertical fixing parts 411 of the outdoor unit frame 210 and the indoor unit frame 110. The two ends of the vertical fixing part 411 are fixed to the outdoor unit frame 210 and the indoor unit frame 110 by fasteners.

[0048] Specifically, the upper end of the vertical fixing part 411 is fixed to the vertical beam 10 of the indoor unit frame 110 by fasteners, and the lower end of the vertical fixing part 411 is fixed to the vertical beam 10 of the outdoor unit frame 210 by fasteners, so as to realize the vertical connection and fixation of the indoor unit frame 110 and the outdoor unit frame 210.

[0049] The horizontal fixing part 412 is a flat plate structure. The horizontal fixing part 412 on one side of the vertical fixing part 411 is used to connect the outer side of the two crossbeams 20 that are in contact with the outdoor unit frame 210 and the indoor unit frame 110 at the corresponding positions. The other horizontal fixing part 412 is connected to the outer side of another crossbeam 20 of the outdoor unit frame 210 and the indoor unit frame 110.

[0050] The horizontal fixing part 412 is provided with at least one fixing hole at the top and bottom respectively, and the upper and lower fixing holes are connected and fixed to the crossbeams 20 of the inner unit frame 110 and the outer unit frame 210 respectively.

[0051] In other words, in the direct expansion machine involved in this application, the outer unit assembly 200 and the inner unit assembly 100 are fixed into an integral structure by the outer connector 410. The outer connector 410 is provided at the four corners of the outer unit assembly 200 and the inner unit assembly 100, including a vertical fixing part 411 and a horizontal fixing part 412 located on both sides of the vertical fixing part 411. The two ends of the vertical fixing part 411 are respectively fixed to the vertical beams of the outer unit assembly 200 and the inner unit assembly 100. The two horizontal fixing parts 412 are arranged vertically between each other and correspond to the positions of the two crossbeams 20 adjacent to the outer unit assembly 200 and the inner unit assembly 100. That is, the horizontal fixing part 412 on one side is fixedly connected to the two crossbeams 20 on the corresponding side of the outer unit assembly 200 and the inner unit assembly 100, and the horizontal fixing part 412 on the other side is fixedly connected to the two adjacent crossbeams 20. The integrated layout of the direct expansion machine occupies less space and is easy to standardize. The structure of the external connector 410 is simple, and the assembly and disassembly process is convenient and quick. The structure of the external connector 410 can realize the fixed connection between the external unit component 200 and the internal unit component 100 in various positions. Moreover, when the height of the equipment room door is insufficient, the internal unit component 100 and the external unit component 200 can be disassembled and separately installed, which is more flexible.

[0052] refer to Figure 5 , Figure 6 In some embodiments of this application, in order to ensure a stable connection between the indoor unit base plate 130 and the outdoor unit top plate 230, the indoor unit base plate 130 and the outdoor unit top plate 230 are also fixed by an internal connector 420.

[0053] The inner connector 420 includes a symmetrically arranged upper connector plate and a lower connector plate. The upper connector plate is located above the indoor unit bottom plate 130, and the lower connector plate is located below the outdoor unit top plate 230. The inner connector 420 is provided with at least two fasteners. One fastener is used to connect the inner connector 420, the indoor unit bottom plate 130, and the outdoor unit top plate 230, and the other fastener is used to connect the inner connector 420, the indoor unit frame, and the outdoor unit frame 210.

[0054] Specifically, both the lower connecting plate and the upper connecting plate are connecting plate structures, and at least one side of them is provided with a positioning bend 421. The positioning bend 421 is used to position the upper connecting plate and the lower connecting plate to improve installation efficiency.

[0055] In some embodiments, the positioning bends 421 are located on two sides perpendicular to each other, one of the positioning bends 421 contacts the inner wall of the crossbeam 20 and is used to position the inner connector 420 on the middle partition 140 along the width direction of the direct expansion machine, and the other positioning bend 421 contacts the wire harness connector and is used to position the inner connector 420 in the length direction of the direct expansion machine.

[0056] In some embodiments of this application, the indoor unit bottom plate 130 and the outdoor unit top plate 230 are provided with connection holes at corresponding positions. One fastener passes through the connecting upper plate, the indoor unit bottom plate 130, the outdoor unit bottom plate and the connecting lower plate in sequence to connect and fix them. Another fastener passes through the connecting upper plate, the indoor unit frame, the outdoor unit frame 210 and the lower connecting plate in sequence to connect and fix them, so as to achieve a stable connection between the indoor unit top plate 150 and the outdoor unit top plate 230 and prevent misalignment.

[0057] The inner connector 420 further connects and fixes the indoor unit base plate 130 in the indoor unit assembly 100 and the outdoor unit top plate 230 in the outdoor unit assembly 200. The inner connector 420 is also fixed to the indoor unit frame and the outdoor unit frame 210 by fasteners, which further improves the stability of the connection.

[0058] refer to Figures 7-9 In some embodiments of this application, the indoor unit assembly 100 is also horizontally provided with a partition 140, which divides the indoor unit assembly 100 into a first indoor unit cavity and a second indoor unit cavity arranged vertically. A fan component 141 is provided in the first indoor unit cavity, and an indoor unit heat exchanger 131 is provided in the second indoor unit cavity.

[0059] To improve the connection stability of the partition plate 140, the indoor unit frame is also provided with a cross beam 21 and a vertical beam 11 arranged in a cross pattern. The partition plate 140 has bends on its periphery, which are connected and fixed to the cross beam 21.

[0060] The partition 140 divides the indoor unit assembly 100 into a first indoor unit cavity and a second indoor unit cavity, which are used to install the fan component 141 and the indoor unit heat exchanger 131, respectively.

[0061] The top of the indoor unit assembly 100 is also provided with an indoor unit top plate 150, on which an air outlet 151 is provided for outputting airflow.

[0062] The partition plate 140 is also provided with an air inlet that communicates with the air inlet of the fan component 141. The airflow after heat exchange by the indoor unit heat exchanger 131 passes through the air inlet and the fan component 141 and is output from the top air outlet 151 of the indoor unit assembly 100.

[0063] In some embodiments of this application, an air inlet is formed on the indoor unit side panel 120. Specifically, the air inlet is formed on the rear side of the indoor unit assembly 100, and a filter 170 is also provided on the outer side of the air inlet.

[0064] The indoor unit heat exchanger 131 is arranged at an angle in the second indoor unit cavity. The airflow filtered by the filter 170 is input from the air inlet to the windward side of the indoor unit heat exchanger 131. The indoor unit heat exchanger 131 is specifically an evaporator. Driven by the fan component 141, the airflow passes through the evaporator for heat exchange and is output from the leeward side of the indoor unit heat exchanger 131, and is input upward through the air outlet into the first indoor unit cavity.

[0065] The first and second indoor unit cavities are connected by an air inlet so that the airflow input from the air inlet passes through the indoor unit heat exchanger 131 and the fan component 141, and is then output from the air outlet 151.

[0066] In other words, in addition to the indoor unit base plate 130 and the indoor unit side plate 120, the indoor unit assembly 100 also has an indoor unit top plate 150 on top of the indoor unit assembly 100. An air outlet 151 is provided on the indoor unit top plate 150, and the air outlet 151 is connected to the first indoor unit cavity. The indoor unit heat exchanger 131 is arranged at an angle, which is beneficial to increasing the heat exchange area of ​​the airflow.

[0067] In some embodiments of this application, the partition 140 is specifically mounted on the indoor unit frame 110 by a support member 160, and the support member 160 is specifically disposed at the four corners of the partition 140.

[0068] Each support member 160 includes a support stand 161 and fixed feet 162 located at both ends of the support stand 161. The support stand 161 is fixed to the inner side of the upright beam of the indoor unit frame 110 by fasteners. The fixed feet 162 located at the upper end of the support stand 161 are fixed below the middle partition 140, and the fixed feet 162 located at the lower end of the support stand 161 are fixed to the crossbeam 20 of the indoor unit frame 110.

[0069] Both the support stand 161 and the fixing foot 162 are provided with fixing holes. The support stand 161 is fixed to the inside of the upright beam by fasteners such as fastening screws. The top of the fixing foot 162 is fixed to the upper crossbeam 20, and the bottom of the fixing foot 162 is fixed to the crossbeam 20 at the bottom of the inner unit frame.

[0070] A support member 160 is provided at the bottom of the partition plate 140. The support member 160 is located on the inside of the indoor unit frame and plays a supporting role. Both the support member 160 and the upright beam of the indoor unit frame are angle steel structures. The support member 160 is located on the inside of the upright beam to avoid occupying the space of the second indoor unit cavity and improve the space utilization rate.

[0071] In some embodiments of this application, a first water receiving tray (not shown) is also provided at the bottom of the second indoor unit cavity, and a second water receiving tray 350 is provided below the outdoor unit assembly 200. Specifically, the second water receiving tray 350 is disposed inside the base assembly 300, and the first water receiving tray and the second water receiving tray 350 are connected by a drain pipe. Through mounting holes are provided on the indoor unit bottom plate 130 and the outdoor unit top plate 230 for the drain pipe to pass through.

[0072] In some embodiments of this application, the indoor unit base plate 130 and the outdoor unit top plate 230 are also provided with wire harness connectors for power cords and communication lines to pass through.

[0073] The power cord and communication cable are connected to the working components such as the fan component 141 to supply power and transmit signals to the working components such as the fan component 141.

[0074] In some embodiments of this application, a first refrigerant pipeline is connected between the outdoor unit heat exchanger 250 and the indoor unit heat exchanger 131, and a second refrigerant pipeline is connected between the indoor unit heat exchanger 131 and the compressor 240. Two through holes are also provided on the indoor unit bottom plate 130 and the outdoor unit top plate 230, respectively for the first refrigerant pipeline and the second refrigerant pipeline to pass through.

[0075] Refer again Figure 1 , Figure 2 as well as Figure 5 In some embodiments of this application, the front side of the indoor unit assembly 100 is provided with a first inspection door 121 and a second inspection door 122 arranged vertically, the first inspection door 121 corresponding to the first indoor unit cavity; the second inspection door 122 corresponding to the second indoor unit cavity.

[0076] The first inspection door 121 and the second inspection door 122 are both located on the front side of the indoor unit assembly 100, and the air inlet is located on the rear side of the indoor unit assembly 100, with the air inlet positioned opposite to the second inspection door 122.

[0077] The first inspection door 121 is used to facilitate the maintenance of the fan component 141, and the second inspection door 122 is used to facilitate the maintenance of the indoor unit heat exchanger 131.

[0078] In some embodiments of this application, a third maintenance door 221 is provided on the outdoor unit side panel 220 of the outdoor unit assembly 200. The third maintenance door 221 is also provided on the front side of the outdoor unit assembly 200. A fourth maintenance door 222 is also provided on the rear side of the outdoor unit assembly 200 to facilitate maintenance by operators.

[0079] The outdoor unit heat exchanger 250 and electrical control box 260 in the outdoor unit assembly 200 are arranged side by side along the length of the outdoor unit assembly 200, making it convenient for operators to enter for maintenance through the third access door 221. The compressor 240 is located on the rear side of the electrical control box 260, and the compressor 240 can be accessed for maintenance through the fourth access door 222.

[0080] In some embodiments of this application, the outdoor unit heat exchanger 250 is a shell-and-tube heat exchanger, and the two ports of the shell-and-tube heat exchanger are fixed to the crossbeam 20 of the outdoor unit frame 210 by a support plate. The outdoor unit assembly 200 is also provided with a decorative panel 270, which is used to cover the outside of the support plate. The outer wall of the decorative panel 270 is flush with the side panel 220 of the outdoor unit.

[0081] Decorative panel 270 is used to improve the aesthetics of outdoor unit assembly 200 and enhance its overall appearance.

[0082] refer to Figures 10-12 The base assembly 300 is located below the outdoor unit assembly 200 and provides support for the entire direct expansion machine.

[0083] The four corners of the base assembly 300 are connected and fixed to the four corners of the outdoor unit assembly 200 by connecting angle steel 340.

[0084] The base assembly 300 includes a support base 310, a protective component 330, and a forklift component 320.

[0085] The support base 310 is used to support the working components such as the compressor 240, gas-liquid separator, outdoor unit heat exchanger 250, and electrical control box 260.

[0086] The forklift assembly 320 includes a mounting frame and at least two forklift beams 323 spaced apart along the length of the mounting frame.

[0087] The length of the mounting frame is consistent with the length of the direct expander. The spacing between the forklift beams 323 is consistent with the spacing between the forklift beams on the front side of the forklift. The forklift beams are inserted under the forklift beams 323 for transporting the base assembly 300.

[0088] Along the width of the base assembly 300, the mounting frame is detachably connected to the rear side of the protective component 330.

[0089] A mounting groove is formed between the mounting frame and the support base 310, and the protective component 330 is disposed in the mounting groove.

[0090] Each forklift beam 323 is fixed at one end to the mounting frame, and the other end extends along the width of the mounting frame to below the base assembly 300.

[0091] refer to Figure 13 , Figure 14 In some embodiments of this application, the support base 310 includes a support outer frame and a support bottom beam 314 disposed within the support outer frame. The support bottom beam 314 includes a plurality of interconnected support cross beams and support longitudinal beams.

[0092] The positions of the support beams and support longitudinal beams are determined according to the specific locations of components such as the compressor 240, outdoor unit heat exchanger 250, and electrical control box 260, and they serve to provide support.

[0093] The supporting frame includes a front beam 311, a rear beam 312, and two side beams 313 connecting the front beam 311 and the rear beam 312. The mounting frame can be detachably connected to the rear beam 312 or the side beams 313. The front beam 311 and the rear beam 312 are provided with clearance slots 315 corresponding to the position of the forklift beam 323, for the forklift beam 323 to pass through.

[0094] refer to Figure 16 In some embodiments of this application, the mounting frame includes a mounting crossbeam 321 parallel to the rear beam 312 and mounting side frames 322 located on both sides of the mounting crossbeam 321. The ends of the mounting side frames 322 are detachably connected to the rear beam 312 or the side beam 313.

[0095] One end of the forklift beam 323 is detachably connected to the mounting beam 20, and the other end passes through the clearance slot 315 on the rear beam 312 and is fixed to the front beam 311.

[0096] The mounting beam 20 is also equipped with clearance slots 315 to facilitate forklift transport from the front or rear.

[0097] During installation, the mounting crossbeam 321 and mounting side frame 322 are first connected on the production line by mechanical connection or welding. Then, the forklift beam 323 is fixed on the rear beam 312 to complete the assembly of the mounting frame.

[0098] After the mounting frame is assembled, the forklift beam 323 is connected to the clearance slot 315, and the other end of the forklift beam 323 is fixed to the front beam 311. The mounting side frame 322 is fixed to the rear beam 312 or the side beam 313, thus realizing the connection and fixation between the mounting frame and the support base 310.

[0099] refer to Figure 17 In some embodiments of this application, the protective member 330 is pre-fixed on the mounting frame. Specifically, the protective member 330 is a protective plate structure. A connecting outer edge 332 is formed on the periphery of the protective member 330. The connecting outer edge 332 is specifically formed on the other three sides except for the side connected to the rear beam 312, and is used to connect and fix to the mounting beam 20 and the forklift beam 323 respectively.

[0100] The protective plate has heat dissipation holes 331, and the protective component 330 is fixed to the mounting frame by connecting the outer edge 332.

[0101] The protective plate can be used to prevent foreign objects from entering the base assembly 300, and the heat dissipation holes 331 provided on it help to dissipate heat from the components in the outdoor unit assembly 200.

[0102] In some embodiments of this application, a second water receiving tray 350 is also provided below the support base 310. The second water receiving tray 350 is V-shaped, with high sides and low middle, in order to achieve the purpose of water accumulation.

[0103] Specifically, along the length of the support base 310, the height of the second water receiving tray 350 gradually decreases from both sides to the middle. A drain part 351 is provided on the front beam 311. The position of the drain part 351 corresponds to the middle position of the second water receiving tray 350, and is used to drain the condensate in the second water receiving tray 350.

[0104] The periphery of the second water receiving tray 350 is connected and fixed to the support base 310 by welding to prevent water leakage.

[0105] After welding, each component is powder-coated to prevent rust. Then, an insulation layer is pasted onto the back of the second water receiving tray 350, with a thickness of 5-10mm.

[0106] The bottom of the second water tray 350 is equipped with an insulation layer to prevent condensation.

[0107] During installation, after the support base 310 is assembled, the second water receiving tray 350 is installed at the bottom of the support base 310 by welding. Then, the insulation layer is laid under the second water receiving tray 350 to prevent condensation. Finally, the forklift component 320 is fixed to the support base 310 to complete the assembly of the base assembly 300. The detachable connection between the forklift component 320 and the support base 310 also facilitates the installation of the second water receiving tray 350 and the insulation layer.

[0108] Whenever possible, the various aspects and features described and shown in the specification can be applied individually, and these individual aspects can serve as the subject of a divisional application.

[0109] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0110] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A direct expansion machine, characterized in that, include: Outdoor unit components, including: The outdoor unit frame, wherein at least a top panel and a side panel are provided on the outdoor unit frame; and The compressor and the outdoor unit heat exchanger are installed inside the outdoor unit frame; Indoor unit components, including: The indoor unit frame, wherein at least an indoor unit base plate and an indoor unit side plate are provided on the indoor unit frame; and The fan components and the indoor unit heat exchanger are installed in the indoor unit frame; The outdoor unit frame and the indoor unit frame are fixed together by an external connector. The external connector includes a vertical fixing part and a horizontal fixing part located on both sides of the vertical fixing part. The two ends of the vertical fixing part are respectively used to fix the upright beams of the outdoor unit frame and the indoor unit frame. The horizontal fixing parts are respectively used to fix the two horizontal beams that are in adjacent contact with the outdoor unit frame and the indoor unit frame.

2. The direct expansion machine according to claim 1, characterized in that, The indoor unit base plate and the outdoor unit top plate are also fixed by an internal connector. The internal connector includes a symmetrically arranged upper connecting plate and a lower connecting plate. The upper connecting plate is located above the indoor unit base plate, and the lower connecting plate is located below the outdoor unit top plate. The internal connector is provided with at least two fasteners. One fastener is used to connect the internal connector, the indoor unit base plate, and the outdoor unit top plate, and the other fastener is used to connect the internal connector, the indoor unit frame, and the indoor unit frame.

3. The direct expansion machine according to claim 1, characterized in that, The indoor unit assembly also has a horizontally arranged partition plate, which divides the indoor unit assembly into a first indoor unit cavity and a second indoor unit cavity arranged vertically. A fan component is arranged in the first indoor unit cavity, and an indoor unit heat exchanger is arranged in the second indoor unit cavity.

4. The direct expansion machine according to claim 3, characterized in that, The partition is mounted on the indoor unit frame via support members. Each support member includes a support stand and fixed feet located at both ends of the support stand. The support stand is fixed to the inner side of the vertical beam of the indoor unit frame by fasteners. The fixed feet located at the upper end of the support stand are fixed below the partition, and the fixed feet located at the lower end of the support stand are fixed to the crossbeam of the indoor unit frame.

5. The direct expansion machine according to claim 3, characterized in that, An air inlet is formed on the side panel of the indoor unit, and an air outlet is provided on the top panel of the indoor unit. The heat exchanger of the indoor unit is arranged at an angle in the second indoor unit cavity. The first indoor unit cavity and the second indoor unit cavity are connected so that the airflow input from the air inlet passes through the heat exchanger of the indoor unit and the fan component, and is then output from the air outlet.

6. The direct expansion machine according to claim 3, characterized in that, The bottom of the second indoor unit cavity is provided with a first water receiving tray, and the bottom of the outdoor unit assembly is provided with a second water receiving tray. The first water receiving tray and the second water receiving tray are connected by a drain pipe. The bottom plate of the indoor unit and the top plate of the outdoor unit are provided with through mounting holes for the drain pipe to pass through.

7. The direct expansion machine according to claim 1, characterized in that, The indoor unit base plate and the outdoor unit top plate are also equipped with wire harness connectors for power cords and communication lines to pass through.

8. The direct expansion machine according to claim 1, characterized in that, A first refrigerant line is connected between the outdoor unit heat exchanger and the indoor unit heat exchanger, and a second refrigerant line is connected between the indoor unit heat exchanger and the compressor. Two through holes are also provided on the indoor unit bottom plate and the outdoor unit top plate, respectively for the first refrigerant line and the second refrigerant line to pass through.

9. The direct expansion machine according to claim 5, characterized in that, The front side of the indoor unit assembly is provided with a first maintenance door and a second maintenance door arranged vertically. The first maintenance door corresponds to the position of the first indoor unit cavity; the second maintenance door corresponds to the position of the second indoor unit cavity. The air inlet is positioned opposite the second inspection door, and a filter is also provided on the outside of the air inlet.

10. The direct expansion machine according to claim 1, characterized in that, The outdoor unit heat exchanger is a shell-and-tube heat exchanger, and the two ports of the shell-and-tube heat exchanger are fixed to the crossbeam of the indoor unit frame by a support plate. The outdoor unit assembly is also provided with a decorative panel for covering the outside of the supporting upright plate, and the outer wall of the decorative panel is flush with the side plate of the outdoor unit.

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