A gallery type central air conditioning host equipment platform

Abstract

The present application belongs to the technical field of refrigeration, air conditioning and building design, and discloses a gallery type central air conditioner host equipment platform, which is provided with a plurality of groups of air conditioner host modules in the equipment platform along the transverse direction; the air conditioner host module is composed of a front unit host and a rear unit host in a "back-to-back" longitudinal combination; the air conditioner host modules are connected in series to form a ")(" type air duct; the air outlet of the air exhaust cavity of the air conditioner host module is arranged on the outer facade of the equipment platform, and the area ratio of the air outlet to the air inlet area on the outer facade of the equipment platform is 1:2-4. The present application realizes uniform ventilation and heat exchange of the outer heat exchanger of the air conditioner host under its own environmental pressure, realizes the full-space regional super-high-efficiency development and utilization of the equipment platform, realizes the integration of three channels, and greatly improves the energy density of the equipment platform.

Description

Technical Field

[0001] This invention belongs to the technical field of refrigeration and air conditioning and building design, and particularly relates to an external corridor-type central air conditioning unit platform. Background Technology

[0002] An external corridor-style equipment platform refers to a floor in a high-rise building where all or most of the effective area is used for the installation of equipment such as air conditioners. Currently, the external heat exchanger modules of existing commercial central air conditioning units are mostly configured with "finned tube heat exchangers + top-discharge axial flow fans," such as... Figure 1 As shown.

[0003] Multi-split commercial central air conditioning units used in high-rise or super high-rise buildings are typically located within an external corridor-style equipment platform, such as... Figure 2 As shown, this method utilizes equipment platform space and air energy resources efficiently and intensively, reducing the construction cost of the equipment platform while achieving efficient use of energy resources.

[0004] Existing technology for an equipment room housing an outdoor unit (CN215889470U) discloses the addition of louvers and an air guide hood within the equipment room. The louvers are installed on the windows, the air inlet of the air guide hood is connected to the outdoor unit, and the air outlet of the air guide hood is close to or abuts against the louvers. This solution, through the combined use of louvers and an air guide hood, can directly exhaust the hot air generated by the outdoor unit to the outside of the equipment room, improving the heat exchange performance of the outdoor unit's heat exchanger to some extent. However, it still cannot effectively solve the problems of uneven ventilation and heat exchange inside the equipment platform and excessively high internal ambient temperature.

[0005] The existing technology, a heat dissipation system for the outdoor unit of a variable refrigerant flow (VRF) air conditioner (CN212339468U), discloses a heat dissipation system including inlet louvers, a duct system, exhaust louvers, and an anti-backflow baffle. The outdoor unit is mounted on an equipment platform. The inlet louvers are located on the front of the outdoor unit and directly opposite the air inlet required for heat dissipation. The exhaust louvers are connected to the exhaust outlet of the outdoor unit via the duct system and are located above the inlet louvers. The anti-backflow baffle is located between the inlet and exhaust louvers to prevent short-circuiting of the airflow. This solution improves the heat dissipation effect of the outdoor unit through the anti-backflow baffle, but it still cannot effectively solve the problems of uneven ventilation and heat exchange inside the equipment platform and excessively high ambient temperature inside the equipment platform.

[0006] In summary, existing "top-discharge" commercial central air conditioning units, such as multi-split systems and air-cooled water chiller modules, as well as the structural relationship between these units and the external corridor-style equipment platform, still present many technical challenges, including:

[0007] (1) The external heat exchangers of the two air conditioning units (rear and front) experience uneven ventilation and heat exchange within the equipment platform environment. The internal temperature of the equipment platform is excessively high in summer and excessively low in winter, affecting the heat exchanger performance. Figure 3 As shown.

[0008] The air intake volume varies in different areas of the external heat exchanger of a single air conditioning unit, resulting in poor overall heat exchange performance.

[0009] (2) The utilization rate of the entire equipment platform space is low, especially the upper space of the equipment platform, which is a ventilation blind zone without air duct function from the perspective of ventilation and heat exchange, and is an ineffective space; the shortage of platform area and the idle space on the upper part of the platform coexist, such as Figure 4 As shown.

[0010] (3) The air conditioning unit and its layout occupy a large area, resulting in low cooling power density per unit area of ​​the equipment platform. The outer area of ​​the rear panel of the front and rear air conditioning units on the equipment platform is only used for maintenance of the unit modules in case of failure. Between the horizontally arranged air conditioning unit modules, an air intake channel for the rear unit must be provided, such as... Figure 3 As shown. Summary of the Invention

[0011] To address the aforementioned technical problems and achieve uniform ventilation and heat exchange of the external heat exchanger of the air conditioning unit under its own environmental pressure; to develop and utilize the equipment platform in a fully spatial and regionally efficient manner, achieving no blind spots or dead zones; and to significantly improve the energy density of the equipment platform, this invention provides a central air conditioning unit equipment platform.

[0012] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows:

[0013] An external corridor-type central air conditioning unit equipment platform is defined as having a longitudinal direction perpendicular to the outer facade of the external corridor-type equipment platform and a transverse direction parallel to the outer facade of the external corridor-type equipment platform; several sets of air conditioning unit modules are arranged transversely within the equipment platform.

[0014] The air conditioning unit module is composed of a front unit unit and a rear unit unit arranged vertically back to back;

[0015] The air outlet of the air conditioning unit module is located on the outer facade of the equipment platform, and the ratio of the outlet area to the inlet area on the outer facade of the equipment platform is 1:2 to 4.

[0016] Furthermore, the air intake area is the area on the exterior of the equipment platform used for outdoor air to enter the equipment platform; or, the area on the exterior of the equipment platform excluding the area of ​​the exhaust cavity outlet.

[0017] Furthermore, the air conditioning unit module is located on the side close to the outer facade of the equipment platform; the air intake area located at the top of the exhaust cavity connects the upper space of the equipment platform and the inner space of the equipment platform, forming the air intake channel of the rear unit unit.

[0018] Furthermore, the air conditioning unit module is mounted on the mounting bracket and close to the outer side of the equipment platform; the upper edge of the exhaust port is close to or abuts the upper edge of the outer side of the equipment platform; the mounting bracket at the bottom of the air conditioning unit module forms an air intake channel, which, together with the inner space of the equipment platform, constitutes the air intake channel of the rear unit unit.

[0019] Furthermore, an orifice plate is provided on the windward side of the external heat exchanger located on the air inlet channel of the rear unit main unit to improve the vertical uniformity of the air inlet of the external heat exchanger.

[0020] Furthermore, the hole spacing of the perforated plate shown changes gradually in the vertical direction, with the spacing increasing at the top and decreasing at the bottom.

[0021] Furthermore, the external heat exchangers of the front unit host and the rear unit host are horizontal "C"-shaped finned tube heat exchangers. The middle side of the "C"-shaped finned tube heat exchanger is a plane and parallel to the outer facade of the equipment platform. The opening width of the "C"-shaped finned tube heat exchanger is greater than the plane width of the middle side. Adjacent air conditioning host modules form ")(" type air ducts.

[0022] Furthermore, the horizontal cross-section of the external heat exchanger is polygonal, including triangular, pentagonal, or heptagonal shapes; preferably, the external heat exchanger is triangular, and the structure of the “)(” type air duct is adjusted to the “><” type air duct.

[0023] Furthermore, the exhaust outlets of the front unit host and the rear unit host are arranged side by side in the vertical direction on the outer facade of the equipment platform.

[0024] Furthermore, the fans of the front unit host and the rear unit host are respectively located at the air outlet of the exhaust chamber; or, the fans are located on the top of the front unit host and the rear unit host.

[0025] Furthermore, the exterior of the equipment platform is provided with louvers; the exhaust outlet of the exhaust cavity is close to or abuts against the louvers.

[0026] Furthermore, the width d at the narrowest point of the “)(” type air duct formed between adjacent air conditioning unit modules is 20-200mm.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] ① Achieve ultra-high load intensity, significantly reduce the platform area of ​​air conditioning unit, and improve the overall space utilization of the equipment platform.

[0029] This invention transforms the blind spot in the upper space of the equipment platform into an air intake duct for the rear unit host, eliminating the longitudinal air duct between the existing horizontally adjacent air conditioning unit modules. At the same time, by combining the front unit host and the rear unit host back-to-back to form the air conditioning unit module, the ventilation blind spot on the outside of the rear panel of the existing unit host is eliminated, achieving ultra-high load strength of the equipment platform and significantly reducing the area of ​​the equipment platform.

[0030] In this invention, the unused space at the top of the equipment platform is developed into the air intake duct of the rear unit host of the air conditioning host module, replacing the original longitudinal air duct between adjacent air conditioning host modules used for the air intake of the external heat exchanger of the rear unit host, thus saving the equipment platform area and the middle and lower space.

[0031] This invention also uses two integrated three-sided central air conditioning unit main units to construct one central air conditioning main unit module "back to back". In essence, the back panels of the two main units in one main unit module are set tightly against each other, reducing the "external heat exchanger ventilation and heat exchange" blind area on the outside of the back panel when the unit main unit is set independently to zero. The two unit main units are directly combined back to back to form a polygonal external heat exchanger horizontal structure. All the areas around the main unit module are ventilation areas, and all the sides of the main unit module are ventilation and heat exchange surfaces.

[0032] For the two reasons mentioned above, the bottom, middle, upper, outer, middle, and inner parts of the equipment platform space in this embodiment are all involved in the construction of the air intake and exhaust air paths of the two unit main units of the air conditioning main unit module, realizing the efficient utilization of the entire space of the module equipment platform without dead angles or blind spots.

[0033] The cooling power density of the air conditioning unit platform of this invention can reach more than 30kw / ㎡, which is 2.7 times the average cooling power density of 11kw / ㎡ of existing equipment platforms. This invention significantly increases the power density of the equipment platform by 170%, that is, under the condition that the total cooling load of the building remains unchanged, the area of ​​the air conditioning unit room is significantly reduced by 63%.

[0034] ② It eliminates uneven ventilation in the external heat exchanger of the main unit module and improves the performance of the air conditioning unit.

[0035] The principle of setting the host module in this embodiment, in which the "back panel of the unit host is parallel to the outer facade of the equipment platform", eliminates the problems of uneven ventilation and uneven fan load on the inner and outer sides of the heat exchanger of the unit host when the back panel is set perpendicular to the outer facade. However, if the problem of "unevenness" is eliminated by increasing the lateral spacing between adjacent host modules and setting up longitudinal air ducts, the area occupied by the equipment platform will be increased, and the power density of the equipment platform will be reduced.

[0036] This invention significantly reduces the number and density of air conditioning unit outlets on the exterior of the equipment platform, and significantly reduces the total perimeter of the outlets, achieving high-speed jet exhaust after the outlets are merged, thus overcoming the long-standing problem of airflow short-circuiting in the air conditioning unit. This invention also increases the effective air intake area and its proportion on the exterior of the equipment platform, achieving low-speed, low-resistance air intake. This establishes a highly efficient heat exchange operation state for the air conditioning unit module's external heat exchanger, characterized by large-area low-speed air intake on the exterior of the corridor-type equipment platform, three-dimensional air supply to the external heat exchanger in the three-dimensional space of the corridor, and concentrated high-speed jet exhaust to the ambient atmosphere from the outlets on the exterior.

[0037] This invention effectively overcomes the long-standing problem of airflow short-circuiting in the external heat exchanger of the air conditioning unit and establishes a highly efficient heat exchange operation state with low-speed air intake on the exterior facade of the equipment platform, three-dimensional air supply from the external heat exchanger, and high-speed jet exhaust from the air outlet on the exterior facade. This improves the evaporation pressure of the external heat exchanger in the heating mode of the air conditioning unit and reduces the condensation pressure of the external heat exchanger in the cooling mode, thereby improving the COP and enhancing the performance of the air conditioning unit.

[0038] ③ Easy to install and maintain

[0039] The inner space of the equipment platform of the present invention serves as the installation channel for the unit host, the air inlet channel for the external heat exchanger of the rear unit host, and the maintenance and replacement space for the air conditioning unit module.

[0040] This invention not only simplifies the installation of the central air conditioning unit module on the equipment platform, but also greatly facilitates the maintenance of the air conditioning unit: by simply disassembling the faulty air conditioning unit module and moving the rear unit unit to the inner space, a temporary maintenance operation space can be established between the front unit unit and the rear unit unit. The back panel of the unit unit can be easily opened, and the main components of the refrigeration system, such as the compressor, four-way valve, solenoid valve, and electrical control box, can be inspected and maintained on-site.

[0041] ④ The air ducts formed between adjacent air conditioning unit modules are of the type “)(”. The front unit unit and the rear unit unit form their own air ducts. The air intake volume of each area of ​​the external heat exchanger of a single air conditioning unit is uniform, ensuring the overall heat exchange effect of the heat exchanger. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the structure of an existing multi-split air conditioning unit;

[0043] Figure 2 A schematic diagram of the air outlet distribution on the exterior facade of an existing corridor-type equipment platform with installed multi-split air conditioning modules.

[0044] Figure 3 A schematic diagram of the ventilation blind zone between the back panels of the unit hosts on an existing equipment platform;

[0045] Figure 4A schematic diagram of ineffective spaces that do not contribute to ventilation and heat exchange in the vertical sectional view of the existing equipment platform;

[0046] Figure 5 This is a top view of the air conditioning unit module arrangement in Examples 1-3;

[0047] Figure 6 The following are front views of the exterior facade of the central air conditioning unit platform in Examples 1-3.

[0048] Figure 7 This is a vertical sectional view of the external corridor-type central air conditioning unit platform in Example 1;

[0049] Figure 8 This is a schematic diagram of the air duct of the external corridor-type central air conditioning unit platform in Example 1;

[0050] Figure 9 This is a three-dimensional structural diagram of the pentagonal external heat exchanger in Example 1;

[0051] Figure 10 This is a three-dimensional structural diagram of the triangular external heat exchanger in Example 2;

[0052] Figure 11 This is a vertical sectional view of the external corridor-type central air conditioning unit platform in Example 2;

[0053] Figure 12 This is a schematic diagram of the card plate structure in Example 3;

[0054] Figure 13 This is a vertical sectional view of the external corridor-type central air conditioning unit platform of Example 4;

[0055] Figure 14 This is a schematic diagram of the air duct of the external corridor-type central air conditioning unit platform in Example 4. Detailed Implementation

[0056] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the described embodiments without creative effort are within the scope of protection of this application.

[0057] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0058] In the description of this invention, it should be understood that the terms "lateral", "longitudinal", "length", "up", "down", "left", "right", 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 invention 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 invention.

[0059] Definition: An external corridor-type equipment room platform, defined as the direction perpendicular to the external facade of the external corridor-type equipment platform as longitudinal, and the direction parallel to the external facade of the external corridor-type equipment platform as transverse.

[0060] Example 1

[0061] like Figures 5-9 As shown, an external corridor-type central air conditioning unit equipment platform includes an external facade 1 and an internal wall 2. Several sets of air conditioning unit modules 3 are arranged horizontally within the equipment platform; the air conditioning unit modules 3 are located on the side closest to the external facade 1 of the equipment platform.

[0062] The refrigerant connection pipe 81 or the chilled water connection pipe is installed on the cable tray 8. The air conditioning main unit module is connected to the air conditioning indoor units or fan coil units of each floor and area of ​​the building through the refrigerant connection pipe 81 or the chilled water connection pipe. The air conditioning main unit module works together with the indoor units / fan coil units to cool (heat) the indoor space of the building.

[0063] The air conditioning unit module 3 is composed of a front unit main unit 31 and a rear unit main unit 32 arranged longitudinally back to back; the back panels 39 of both the front unit main unit 31 and the rear unit main unit 32 are parallel to the outer facade 1 of the equipment platform.

[0064] The external heat exchangers 37 of the front unit main unit 31 and the rear unit main unit 32 are horizontal "C"-shaped finned tube heat exchangers. The middle side 371 of the "C"-shaped finned tube heat exchanger is a plane and parallel to the outer facade 1 of the equipment platform. The opening width of the "C"-shaped finned tube heat exchanger is greater than the plane width of the middle side 371. The horizontal cross-section of the external heat exchanger 37 is pentagonal.

[0065] The front unit host 31 and the rear unit host 32 are vertically combined "back to back" to form a polygonal external heat exchanger horizontal structure, so that the adjacent air conditioning host modules 3 form a ")(" type air duct 36; the width d of the narrowest part of the ")(" type air duct formed between the adjacent air conditioning host modules is 20 to 200 mm.

[0066] The area surrounding the air conditioning unit module 3 is a ventilation area, and the sides of the air conditioning unit module are all ventilation and heat exchange surfaces.

[0067] The front unit host 31 and the rear unit host 32 are equipped with a compressor 333 and a gas-liquid separator 334.

[0068] The air outlet 331 of the exhaust chamber 33 of the air conditioning unit module 3 is located on the outer facade 1 of the equipment platform. The air outlet 331 divides the air intake area on the outer facade of the equipment platform into an upper air intake area 34 and a lower air intake area 35.

[0069] The air intake area is the area on the outer facade of the equipment platform used for outdoor air to enter the platform, i.e., the area on the outer facade of the equipment platform excluding the area of ​​the exhaust outlet. The ratio of the outlet area to the air intake area on the outer facade 1 of the equipment platform is 1:3. This makes the exhaust velocity of the air conditioning unit module 3 on the outer facade 1 of the equipment platform about 3 times the intake velocity, and the exhaust kinetic energy about 9 times the intake kinetic energy. The exhaust airflow has a long range and good diffusion and dilution effect when injected into the ambient atmosphere, effectively blocking the short circuit between exhaust and intake airflow on the outer facade of the equipment platform.

[0070] The external heat exchanger 37, together with the base plate, rear plate 39, and top plate of the unit main unit, encloses the negative pressure chamber of the external heat exchanger. From the perspective of the airflow direction of the external heat exchanger, the external heat exchanger of the unit main unit is located at the outer edge of the negative pressure chamber before the air intake of the fan 38, so as to implement negative pressure ventilation and heat exchange.

[0071] The exhaust outlets 331 of the front unit host 31 and the rear unit host 32 are arranged side by side in the vertical direction of the outer facade 1 of the equipment platform.

[0072] The fans 38 of the front unit host 31 and the rear unit host 32 are located on top of the front unit host and the rear unit host.

[0073] The outer facade 1 of the equipment platform is equipped with louvers 6; the exhaust outlet 331 of the exhaust cavity is close to or abuts against the louvers 6.

[0074] The air intake area located at the top of the exhaust cavity 33 connects the upper space 4 of the equipment platform and the inner space 5 of the equipment platform, forming one of the air intake channels of the rear unit host 32.

[0075] The upper space 4 and the inner space 5 of the equipment platform serve as the air inlet channels for the external heat exchanger 37 of the rear unit host 32, and are connected to the exhaust cavity 33 to form the air path of the external heat exchanger of the rear unit host.

[0076] The lower air inlet area 35 of the outer facade 1 of the equipment platform serves as the air inlet surface of the external heat exchanger of the front unit host 31, and is connected to the exhaust cavity 33 to form the air path of the external heat exchanger of the front unit host.

[0077] The length of the air supply path from the upper air inlet area 34 and the lower air inlet area 35 of the equipment platform facade 1 to the windward side of the two unit main heat exchangers, and the resulting friction resistance, as well as the airflow bends, airflow cross-section expansion and contraction and the resulting local resistance along the air supply path, all exhibit significant differences, which are mainly manifested as follows:

[0078] ①The resistance before the air inlet of the external heat exchanger 37 of the front unit host 31 is very small and can be regarded as zero. The air inlet pressure is equal to the atmospheric pressure.

[0079] ②Before the air inlet surface of the external heat exchanger of the rear unit host 32, the total air inlet resistance is significantly greater than that of the front unit host 31 because the air supply path is long and has many bends. The absolute pressure on the air inlet surface of the external heat exchanger of the rear unit host 32 is lower than that of the front unit host 32, and it presents a "slight negative pressure" state relative to the "ambient atmospheric pressure".

[0080] Although the upper air inlet area 34 and the lower air inlet area 35 on the outer facade 1 of the equipment platform have significant differences in their total air inlet resistance along the corresponding air paths, these two air inlet areas are independent. Since these two air inlet areas are the air path inlets of the front unit main unit 31 and the rear unit main unit 32 respectively, this significant difference does not prevent the external heat exchangers of the front unit main unit 31 and the rear unit main unit 32 from achieving uniform air intake.

[0081] Among them, the external heat exchanger 37 of the front unit host 31 directly draws fresh air from the atmospheric pressure environment, and the external heat exchanger 37 provides uniform ventilation under the ambient atmospheric pressure conditions.

[0082] The fan 38 of the front unit main unit 31 operates at high speed, generating a negative pressure lower than the ambient atmospheric pressure in the negative pressure chamber of its external heat exchanger 37. This negative pressure draws ambient air through the lower air inlet 35 and across the external heat exchanger 37. After exchanging heat with the refrigerant, the air enters the negative pressure chamber of the external heat exchanger of the front unit main unit 31. The air is then drawn in by the fan 38 and further accelerated by the fan impeller, which pressurizes and sends it into the exhaust chamber 33. Finally, the air is jetted into the ambient atmosphere at high speed at the outlet 331 for diffusion and dilution.

[0083] The external heat exchanger 37 of the rear unit host 32 draws in fresh air in an environment with a slight negative pressure relative to the ambient atmospheric pressure, and the external heat exchanger 37 provides uniform ventilation under the condition of slight negative pressure relative to the ambient atmospheric pressure.

[0084] The fan 38 of the rear unit host 32 operates at high speed, generating a lower negative pressure in the negative pressure chamber of the external heat exchanger 37 than outside the external heat exchanger. This draws ambient air from the upper air intake area 34 of the outer facade 1 of the equipment platform into the upper space 4 of the equipment platform, then downwards through the inner space 5 of the equipment platform and through the external heat exchanger 37. After exchanging heat with the refrigerant, the air enters the negative pressure chamber of the external heat exchanger, is drawn in by the fan 38, and is then accelerated and boosted by the fan impeller before being sent into the exhaust chamber 33 of the rear unit host. At the air outlet 331, the air is jetted into the ambient atmosphere at high speed for diffusion and dilution.

[0085] During operation of this embodiment, the bottom space, inner space 5, and upper space 4 of the equipment platform are all involved in the construction of the air intake and exhaust air paths of the air conditioning unit module 3, realizing efficient utilization of the entire space of the equipment platform without dead angles or blind spots, and significantly improving the cooling (heating) load and cooling (heating) capacity per unit area of ​​the equipment platform.

[0086] Example 2

[0087] This embodiment is similar to the solution in Embodiment 1, except that:

[0088] Figure 10 and 11 As shown, the horizontal cross-section of the external heat exchanger 37 is triangular. The structure of the ")(" type air duct 36 is adjusted to the "><" type air duct 36.

[0089] The exhaust port 331 of the air conditioning unit module 3 is located on the outer facade 1 of the equipment platform, and the ratio of the exhaust port area to the air inlet area on the outer facade 1 of the equipment platform is 1:2.

[0090] The fans 38 of the front unit host 31 and the rear unit host 32 are respectively located at the air outlet 331 of the exhaust cavity.

[0091] Since the fans 38 of the front unit host 31 and the rear unit host 32 are set at the air outlet 331 of the exhaust cavity close to the outer facade 1 of the equipment platform, the negative pressure low-speed air intake section before the air inlet of the fan 38 is lengthened and the length of the high-speed air exhaust section after the air outlet 331 is reduced, the total resistance of the air path is reduced and the power consumption of the fan is reduced. At the same time, the exhaust speed of the fan is high, and the exhaust jet has a long range and good diffusion and dilution effect in the ambient atmosphere.

[0092] Example 3

[0093] This embodiment is similar to the solution in Embodiment 1, except that:

[0094] like Figure 11 and 12 As shown, the air inlet streamline of the lower part of the external heat exchanger of the rear unit host 32 is longer than that of the upper part. This results in a short heat exchange ventilation path with small curvature, low resistance and high ventilation velocity in the upper finned tube, while the heat exchange ventilation path with large curvature, high resistance and low ventilation velocity in the lower finned tube is long. As a result, the ventilation velocity distribution of the external heat exchanger is uneven in the vertical direction, with the upper part being larger than the lower part.

[0095] In this embodiment, an orifice plate 7 is provided on the windward side of the external heat exchanger 37, and the spacing between the orifices of the orifice plate 7 changes gradually from top to bottom: the spacing between the orifices at the top is larger, the spacing between the orifices in the middle and lower parts decreases in turn, and the spacing between the orifices at the bottom is the smallest.

[0096] In this embodiment, the vertical non-uniformity of ventilation of the external heat exchanger of the rear unit host 32 is compensated by the perforation density of the perforation plate 7, which has a sparser upper part and a denser lower part. This reduces the air intake volume at the top of the external heat exchanger 37, gradually decreases the air intake volume at the middle and lower parts, and keeps the air intake volume at the bottom relatively stable. As a result, the ventilation velocity distribution of the external heat exchanger tends to be consistent vertically and uniformly.

[0097] The exhaust port 331 of the air conditioning unit module 3 is located on the outer facade 1 of the equipment platform, and the ratio of the exhaust port area to the air inlet area on the outer facade 1 of the equipment platform is 1:4.

[0098] Example 4

[0099] This embodiment is similar to the solution in Embodiment 1, except that:

[0100] like Figures 13-14 As shown, an external corridor-type central air conditioning unit equipment platform includes an external facade 1 and an internal wall 2. Several sets of air conditioning unit modules 3 are arranged horizontally within the equipment platform; the air conditioning unit modules 3 are located on the side closest to the external facade 1 of the equipment platform.

[0101] The air conditioning unit module 3 is mounted on the mounting bracket 9.

[0102] The upper edge of the air outlet 331 of the exhaust cavity 33 of the air conditioning unit module 3 is close to or abuts the upper edge of the outer facade of the equipment platform.

[0103] The exhaust outlets 331 of the front unit host 31 and the rear unit host 32 are arranged side by side in the vertical direction of the outer facade 1 of the equipment platform. The outer facade 1 of the equipment platform is provided with louvers 6; the exhaust outlets 331 are close to or abut against the louvers 6.

[0104] The air intake area on the exterior of the equipment platform is divided into an upper air intake area 34 and a lower air intake area 35.

[0105] The mounting bracket 9 at the bottom of the air conditioning unit module forms an air intake channel, which, together with the inner space 5 of the equipment platform, constitutes the air intake channel of the rear unit unit 32.

[0106] The lower air inlet area 35 of the outer facade 1 of the equipment platform serves as the air inlet surface of the external heat exchanger of the rear unit host 32. The air inlet channel of the rear unit host 32 is connected to the exhaust cavity 33 to form the air path of the external heat exchanger of the rear unit host.

[0107] The upper air inlet area 34 of the outer facade 1 of the equipment platform serves as the air inlet surface of the external heat exchanger of the front unit host 31, and is connected to the exhaust cavity 33 to form the air path of the external heat exchanger of the front unit host.

[0108] The length of the air supply path from the upper air inlet area 34 and the lower air inlet area 35 of the equipment platform facade 1 to the windward side of the two unit main heat exchangers, and the resulting friction resistance, as well as the airflow bends, airflow cross-section expansion and contraction and the resulting local resistance along the air supply path, all exhibit significant differences, which are mainly manifested as follows:

[0109] ①The resistance before the air inlet of the external heat exchanger 37 of the front unit host 31 is very small and can be regarded as zero. The air inlet pressure is equal to the atmospheric pressure.

[0110] ②Before the air inlet surface of the external heat exchanger of the rear unit host 32, the total air inlet resistance is significantly greater than that of the front unit host 31 because the air supply path is long and has many bends. The absolute pressure on the air inlet surface of the external heat exchanger of the rear unit host 32 is lower than that of the front unit host 32, and it presents a "slight negative pressure" state relative to the "ambient atmospheric pressure".

[0111] Although the upper air inlet area 34 and the lower air inlet area 35 on the outer facade 1 of the equipment platform have significant differences in their total air inlet resistance along the corresponding air paths, these two air inlet areas are independent. Since these two air inlet areas are the air path inlets of the front unit main unit 31 and the rear unit main unit 32 respectively, this significant difference does not prevent the external heat exchangers of the front unit main unit 31 and the rear unit main unit 32 from achieving uniform air intake.

[0112] Among them, the external heat exchanger 37 of the front unit host 31 directly draws fresh air from the atmospheric pressure environment, and the external heat exchanger 37 provides uniform ventilation under the ambient atmospheric pressure conditions.

[0113] The fan 38 of the front unit main unit 31 operates at high speed, generating a negative pressure lower than the ambient atmospheric pressure in the negative pressure chamber of its external heat exchanger 37. This negative pressure draws ambient air through the upper air inlet 34 and across the external heat exchanger 37. After exchanging heat with the refrigerant, the air enters the negative pressure chamber of the external heat exchanger of the front unit main unit 31. The air is then drawn in by the fan 38 and further accelerated by the fan impeller, which pressurizes and sends it into the exhaust chamber 33. Finally, the air is jetted into the ambient atmosphere at high speed at the outlet 331 for diffusion and dilution.

[0114] The external heat exchanger 37 of the rear unit host 32 draws in fresh air in an environment with a slight negative pressure relative to the ambient atmospheric pressure, and the external heat exchanger 37 provides uniform ventilation under the condition of slight negative pressure relative to the ambient atmospheric pressure.

[0115] The fan 38 of the rear unit host 32 operates at high speed, generating a lower negative pressure in the negative pressure chamber of the external heat exchanger 37 than outside the external heat exchanger. This draws ambient air from the lower air intake area 35 of the outer facade 1 of the equipment platform into the upper space 4 of the equipment platform, then downwards through the inner space 5 of the equipment platform and through the external heat exchanger 37. After exchanging heat with the refrigerant, the air enters the negative pressure chamber of the external heat exchanger, is drawn in by the fan 38, and is then accelerated and boosted by the fan impeller before being sent into the exhaust chamber 33 of the rear unit host. At the air outlet 331, the air is jetted into the ambient atmosphere at high speed for diffusion and dilution.

[0116] During operation of this embodiment, the bottom space and inner space 5 of the equipment platform are fully involved in the construction of the air intake and exhaust air paths of the air conditioning unit module 3, realizing efficient utilization of the entire space of the equipment platform without dead angles or blind spots, and significantly improving the cooling (heating) load and cooling (heating) capacity per unit area of ​​the equipment platform.

[0117] The air intake area is the area on the outer facade of the equipment platform used for outdoor air to enter the platform, i.e., the area on the outer facade of the equipment platform excluding the area of ​​the exhaust outlet. The ratio of the outlet area to the air intake area on the outer facade 1 of the equipment platform is 1:4. This makes the exhaust velocity of the air conditioning unit module 3 on the outer facade 1 of the equipment platform approximately 4 times the intake velocity, and the exhaust kinetic energy approximately 16 times the intake kinetic energy. The exhaust airflow has a long range and good diffusion and dilution effect when injected into the ambient atmosphere, effectively blocking the short circuit between exhaust and intake airflow on the outer facade of the equipment platform.

[0118] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A corridor-type central air conditioning unit platform, characterized in that, The direction perpendicular to the exterior facade of the external corridor equipment platform is defined as longitudinal, and the direction parallel to the exterior facade of the external corridor equipment platform is defined as transverse. Several sets of air conditioning unit modules are arranged horizontally within the equipment platform; The air conditioning unit module is composed of a front unit unit and a rear unit unit arranged vertically back to back; The external heat exchangers of the front unit host and the rear unit host are horizontal "C" type finned tube heat exchangers. The middle side of the "C" type finned tube heat exchanger is a plane and parallel to the outer surface of the equipment platform. The opening width of the "C" type finned tube heat exchanger is greater than the plane width of the middle side. Adjacent air conditioning host modules form a "" type air duct. The horizontal cross-section of the external heat exchanger is polygonal, including triangular, pentagonal, or heptagonal shapes; The exhaust outlet of the air conditioning unit module is located on the outer facade of the equipment platform, and the ratio of the exhaust outlet area to the air inlet area on the outer facade of the equipment platform is 1:2 to 4. The exhaust outlets of the front unit host and the rear unit host are arranged side by side in the vertical direction on the outer facade of the equipment platform. The upper edge of the exhaust outlet of the exhaust chamber is close to or abuts against the upper edge of the outer facade of the equipment platform; The air conditioning unit module is located on the side near the outer facade of the equipment platform; the air intake area located at the top of the exhaust cavity connects the upper space of the equipment platform and the inner space of the equipment platform, forming the air intake channel of the rear unit unit. The air conditioning unit module is mounted on the mounting bracket and is located near the outer facade of the equipment platform. The mounting bracket at the bottom of the air conditioning unit module forms an air intake channel, which, together with the inner space of the equipment platform, constitutes the air intake channel for the rear unit unit.

2. The corridor-type central air conditioning unit platform according to claim 1, characterized in that, An orifice plate is installed on the windward side of the external heat exchanger located on the air inlet channel of the rear unit main unit to improve the vertical uniformity of the air inlet of the external heat exchanger.

3. The corridor-type central air conditioning unit platform according to claim 2, characterized in that, The hole spacing of the perforated plate shown changes gradually in the vertical direction, with the spacing increasing at the top and decreasing at the bottom.

4. The corridor-type central air conditioning unit platform according to claim 1, characterized in that, The external heat exchanger is triangular, and the structure of the "" type air duct is adjusted to the "><" type air duct.

5. The corridor-type central air conditioning unit platform according to claim 1, characterized in that, The fans of the front unit host and the rear unit host are respectively located at the air outlet of the exhaust chamber; or, the fans are located on the top of the front unit host and the rear unit host.

6. The corridor-type central air conditioning unit platform according to claim 1, characterized in that, The width d at the narrowest point of the "("-shaped air duct formed between adjacent air conditioning unit modules is 20-200mm.

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